1. An access platform for servicing a valve apparatus, the valve apparatus including a valve body having a circular cross-section and a valve member mounted on the valve body, the access platform comprising: the lifting device comprises a workbench, and a turnover assembly and a lifting assembly which are arranged on the workbench;

the overturning assembly comprises an overturning plate, an overturning driving piece, a turntable and a turntable driving piece; the turnover plate is arranged on the workbench and comprises a first position parallel to the workbench and a second position vertical to the workbench; the turnover driving piece can drive the turnover plate to rotate relative to the workbench between the first position and the second position; the turntable is mounted on the roll-over plate and is used for being connected with the first end part of the valve body; the rotary disc driving piece can enable the valve body to rotate around the axis of the valve body relative to the turnover plate;

the hoisting assembly is used for hoisting the valve body and the valve member.

2. The service rack of claim 1, further comprising a support assembly disposed on the table for supporting the second end of the valve body when the roll-over plate is in the second position.

3. The service rack of claim 2, wherein the support assembly comprises: the first carrier roller and the second carrier roller are arranged on the support frame relatively and can move relatively, and the first carrier roller and the second carrier roller support the second end portion of the valve body together.

4. An access platform for servicing valve apparatus as recited in claim 1, further comprising a height adjustable adjustment member disposed on said table for supporting said roll-over plate when said valve body is rotated to have its axis perpendicular to said table.

5. An access platform for servicing valve apparatus as recited in claim 1, further comprising a floating support disposed on said table, said floating support being disposed between said support assembly and said roll-over plate, said floating support being movable up and down relative to said table to provide floating support for said valve body.

6. An access platform for servicing valve apparatus as recited in claim 5, wherein said access platform further comprises a bracket removably attached to said table, said floating support member being attached to said bracket.

7. An access platform for servicing valve installations as defined in claim 1 wherein levels are provided on both adjacent side walls of the roll-over panel.

8. The service rack of claim 1, wherein the lifting assembly comprises: the valve body and the valve component are hoisted by the hoisting piece, and the hoisting piece can slide relative to the cantilever hanging beam; the hanger support is used for supporting one end of the cantilever hanging beam far away from the upright post.

9. The service rack for servicing valve installations of claim 1, further comprising a movable wheel disposed below the table.

10. An access platform for servicing valve apparatus as claimed in claim 1 wherein the side of said roll-over panel on which said turntable is located is provided with a plurality of sets of distance meters.

Background

The main body of the large-scale isolation butterfly valve of the large-scale power station circulating water system and the like has the dead weight of about 2-5 tons generally, and the dead weight of a steam turbine middle connection door (a reheating steam valve and a reheating regulating door) is about 6 tons. When various types of equipment (hereinafter referred to as valve equipment) are overhauled off line, components such as a valve rod, a valve plate and the like in the equipment need to be removed so as to complete all-around overhaul.

The disintegration method comprises the following basic steps:

1) the whole body is hoisted to a maintenance bracket according to the installation posture, and peripheral parts are removed;

2) the valve body is rotated by 90 degrees in the circumferential direction until the valve rod is vertical, and the valve rod is hoisted by a crane to complete disassembly of the valve rod;

3) and axially overturning the valve body by 90 degrees until the axis of the valve body is vertical, and lifting the valve plate by a crane to finish the disassembly and the disassembly of the valve plate and the like.

The method comprises the following basic steps:

1) and (5) lifting the components such as the valve plate and the like by a crane in a vertical state of the valve body to finish the re-assembly of the valve plate and the like. After the valve seat is reinstalled, the valve seat is axially turned by 90 degrees until the axis is horizontal;

2) the valve seat is rotated to the valve rod shaft hole to be vertical, the valve rod and other parts are hoisted by a crane, and the valve rod and other parts are installed;

3) rotating the valve seat by 90 degrees until the valve rod shaft is horizontal, integrally hoisting the valve seat to a maintenance support, and installing peripheral components;

4) and integrally hoisting to an online mounting point for installation.

In the operation, the valve body is hoisted by a crane of a factory building in the prior art, and the crane is matched with the chain block through a plurality of crane lifting hooks. The existing equipment is large in damage risk, long in working period, and difficult to adjust the levelness or the verticality of a related assembly surface after rotation or overturning, occupies a field traveling crane for a long time, is large in required maintenance field, and cannot be carried out simultaneously with other maintenance work, so that the overall progress is influenced.

Disclosure of Invention

The invention aims to provide a valve maintenance rack to solve the technical problems that a vehicle runs on site for a long time, the required site for maintenance is large and the maintenance efficiency is low in the conventional valve maintenance.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a service rack for servicing a valve apparatus including a valve body having a circular cross-section and a valve member mounted on the valve body, the service rack comprising: the lifting device comprises a workbench, and a turnover assembly and a lifting assembly which are arranged on the workbench; the overturning assembly comprises an overturning plate, an overturning driving piece, a turntable and a turntable driving piece; the turnover plate is arranged on the workbench and comprises a first position parallel to the workbench and a second position vertical to the workbench; the turnover driving piece can drive the turnover plate to rotate relative to the workbench between the first position and the second position; the turntable is mounted on the roll-over plate and is used for being connected with the first end part of the valve body; the rotary disc driving piece can enable the valve body to rotate around the axis of the valve body relative to the turnover plate; the hoisting assembly is used for hoisting the valve body and the valve member.

Further, the service rack also comprises a supporting component arranged on the workbench, and when the turnover plate is at the second position, the supporting component is used for supporting the second end part of the valve body.

Further, the support assembly includes: the first carrier roller and the second carrier roller are arranged on the support frame relatively and can move relatively, and the first carrier roller and the second carrier roller support the second end portion of the valve body together.

Furthermore, the maintenance rack still including locating the workstation and height-adjustable's regulating part, when the valve body rotates to its axis with the workstation is perpendicular, the regulating part is used for supporting the returning face plate.

Furthermore, the maintenance rack also comprises a floating support piece arranged on the workbench, the floating support piece is arranged between the support assembly and the turnover plate, and the floating support piece can move up and down relative to the workbench to provide floating support for the valve body.

Further, the maintenance rack further comprises a bracket, the bracket is detachably arranged on the workbench, and the floating supporting piece is arranged on the bracket.

Furthermore, level gauges are arranged on two adjacent side walls of the turnover plate.

Further, the hoist and mount subassembly includes: the valve body and the valve component are hoisted by the hoisting piece, and the hoisting piece can slide relative to the cantilever hanging beam; the hanger support is used for supporting one end of the cantilever hanging beam far away from the upright post.

Further, the maintenance rack also comprises movable wheels, and the movable wheels are arranged below the workbench.

Furthermore, one side of the turnover plate, which is provided with the rotary disc, is provided with a plurality of groups of distance measuring instruments.

Compared with the prior art, the overhauling rack for overhauling the valve equipment, provided by the invention, has the advantages that the first end part of the valve body is fixed on the turntable, the turntable is driven to rotate by the turntable driving part, and the valve body is driven to rotate around the axis of the valve body relative to the turnover plate by the rotation of the turntable, so that the valve components such as the valve rod and the like can be conveniently disassembled and assembled; the turnover plate is driven to turn over from the second position to the first position through the turnover driving piece, and then the valve body is driven to rotate until the axis of the valve body is vertical to the workbench, so that the valve components such as the valve plate and the like can be conveniently disassembled and assembled; the hoisting assembly can be used for hoisting, disassembling and installing the valve body and the valve member. By using the maintenance rack, maintenance work can be completed in vacant places such as stock yards, idle roads and the like outside the equipment factory building, and equipment such as the field of the equipment factory building and travelling cranes are not occupied; and the maintenance work does not need to be coordinated with the field work, the large-scale valve equipment can be maintained after being offline, the time of the valve equipment maintenance is saved by at least 8-48 h, and the maintenance efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a first structural schematic diagram of a valve device mounted on a maintenance rack for valve device maintenance provided in an embodiment of the present invention;

fig. 2 is a structural schematic diagram of a second valve device mounted on a maintenance rack for valve device maintenance provided in the embodiment of the present invention;

fig. 3 is a schematic structural diagram three of a valve device mounted on a maintenance rack for valve device maintenance provided in the embodiment of the present invention;

FIG. 4 is a first schematic structural diagram of a maintenance rack for valve equipment maintenance according to an embodiment of the present invention;

FIG. 5 is a second schematic structural view of a maintenance rack for valve equipment maintenance according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a cantilever hanger of an access rack for servicing a valve installation according to an embodiment of the present invention;

FIG. 7 is a schematic view of a hanger support structure of an access platform for servicing a valve installation provided in an embodiment of the present invention;

FIG. 8 is a first schematic structural diagram of a workbench of an inspection rack for valve equipment inspection provided by an embodiment of the invention;

FIG. 9 is a second schematic structural view of a workbench of an inspection rack for valve equipment inspection according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of the turnover plate of the service rack for servicing the valve equipment, which is provided by the embodiment of the invention, turned to the first position.

Wherein, in the figures, the respective reference numerals:

10-a valve device; 101-a first end portion; 102-a second end; 103-a valve body; 104-a valve member; 1-a workbench; 11-an electric control cabinet; 12-mounting holes; 13-a ground support oil cylinder; 14-a tow bar; 2-overturning the assembly; 21-a turntable; 211-an adapter flange; 212-a chuck clamp; 2121-jaw; 22-a turnover plate; 23-a tumble drive; 24-a turntable drive; 241-a drive gear; 242-a rotating gear motor; 214-a level; 3-a support assembly; 31-a support frame; 32-a first idler; 33-a second idler; 4-hoisting the assembly; 41-cantilever crane; 411-column; 412-cantilever crane beam; 413-hoisting member; 4131-the sled; 4132-hoist; 42-hanger support; 421-guiding positioning pin; 422-support flange; 423-multi-stage oil cylinder; 424-a backplane; 425-a ground support; 426-a caster; 5-an adjusting part; 6-a floating support; 61-a connecting plate; 62-a support plate; 7-a bracket; 8-a movable wheel; 9-a range finder; 40-a height adjustment mechanism; 401-screw rod; 402-a first nut; 403-a second nut; 50-an auxiliary platform; 60-an auxiliary base; 70-a support adjustment mechanism; 80-support; 90-a rotary drive mechanism; 100-a lifting platform; 200-protective fence.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 10, there will now be described an access rack for valve apparatus service provided by the present invention, the valve apparatus 10 including a valve body 103 having a circular cross-section and a valve member 104 mounted on the valve body 103, the access rack for valve apparatus service including: the device comprises a workbench 1, and a turnover assembly 2 and a hoisting assembly 4 which are arranged on the workbench 1; the overturning assembly 2 comprises an overturning plate 22, an overturning driving piece 23, a rotating disc 21 and a rotating disc 21 driving piece 24; the turnover plate 22 is arranged on the workbench 1 and comprises a first position parallel to the workbench 1 and a second position vertical to the workbench 1; the turnover driving piece 23 can drive the turnover plate 22 to rotate between a first position and a second position relative to the workbench 1; the rotary disc 21 is mounted on the turning plate 22 and is used for being connected with the first end part 101 of the valve body 103; the turntable 21 driving part 24 can enable the valve body 103 to rotate around the axis of the valve body 103 relative to the turnover plate 22; the lifting assembly 4 is used to lift the valve body 103 and the valve member 104. In specific implementation, the first end 101 of the valve body 103 may be fixed to the rotary table 21 in various ways, which may be selected according to the diameter and specific structure of the valve body 103, for example, for a valve body 103 with a larger diameter and two flanged ends, referring to fig. 4, the rotary table 21 may be provided with an adapter flange 211, and the valve body 103 may be positioned by a positioning spigot of the adapter flange 211 and then fixed by a fastener; referring to fig. 5, for a valve body 103 with a smaller diameter or an eccentric flange or non-circular flange structure, a chuck clamp 212 may be mounted on the rotary table 21, and the valve body 103 may be clamped and fixed by the jaws 2121 of the chuck clamp 212 and center-adjusted. The turning plate 22 can rotate relative to the workbench 1 in various ways, for example, the turning plate 22 can be hinged to the workbench 1 through a support 80, the turning driving member 23 can be two turning oil cylinders, the fixed ends of the two turning oil cylinders are hinged to the workbench 1 through a pivot, and the movable ends of the two turning oil cylinders are hinged to the turning plate 22 through a pivot; when the oil cylinders of the two groups of turnover plates 22 extend out, the turnover plates 22 are pushed to a second position vertical to the workbench 1, and the axis of the valve body 103 is in a horizontal state at the moment; when the two groups of turnover oil cylinders retract, the turnover plate 22 is gradually turned to a first position parallel to the workbench 1, and the valve body 103 is turned to a state that the axis is vertical to the workbench 1; of course, it is understood that the turning plate 22 may be rotated relative to the working platform 1 in other manners, and the turning plate 22 may be rotated by other driving mechanisms, which may be selected by those skilled in the art according to actual needs. In an embodiment, the driving member 24 of the turntable 21 may include a driving gear 241 and a rotating speed-reducing motor 242, the driving gear 241 is disposed on the flipping board 22, and the driving gear 241 is engaged with the turntable 21, and the rotating speed-reducing motor 242 drives the driving gear 241 to rotate in the forward and reverse directions, so as to drive the turntable 21 to rotate in the forward and reverse directions, and further drive the valve body 103 to rotate around the axis of the valve body 103 relative to the flipping board 22. An electric control cabinet 11 can be arranged on the workbench 1, and the actions of the maintenance rack are controlled through an operation panel or a wire controller.

When valve components 104 such as a valve rod, a valve plate and the like in the valve device 10 need to be removed to overhaul the valve device 10, the valve body 103 is lifted from a transport vehicle through the hoisting assembly 4, the first end part 101 of the valve body 103 is fixed on the turntable 21 of the turnover plate 22, the turntable 21 driving part 24 drives the turntable 21 to rotate, the valve body 103 is further driven to rotate around the axis of the valve body 103 relative to the turnover plate 22, and the hoisting assembly 4 finishes the removal of the valve rod; the turnover driving member 23 drives the turnover plate 22 to rotate relative to the workbench 1, and further drives the valve body 103 to rotate until the axis of the valve body is perpendicular to the workbench 1, and then the valve plate and other valve components 104 are removed through the hoisting assembly 4. After the maintenance is completed, the valve member 104 such as the valve rod and the valve plate can be mounted on the valve body 103 by reversely operating the above steps.

Compared with the prior art, the overhauling rack for overhauling the valve equipment, provided by the invention, has the advantages that the first end part 101 of the valve body 103 is fixed on the turntable 21, the turntable 21 is driven to rotate by the driving part 24 of the turntable 21, and the rotation of the turntable 21 further drives the valve body 103 to rotate around the axis of the valve body 103 relative to the overturning plate 22, so that the valve member 104 such as a valve rod and the like can be conveniently disassembled and assembled; the turnover plate 22 is driven to turn over from the second position to the first position through the turnover driving piece 23, and then the valve body 103 is driven to rotate until the axis of the valve body is vertical to the workbench 1, so that the valve components 104 such as a valve plate and the like can be conveniently detached and installed; the hoisting assembly 4 can realize hoisting, dismounting and mounting of the valve body 103 and the valve member 104. By using the maintenance rack, maintenance work can be completed in vacant places such as stock yards, idle roads and the like outside the equipment factory building, and equipment such as the field of the equipment factory building and travelling cranes are not occupied; and the maintenance work does not need to be coordinated with the field work, the large-scale valve device 10 can be maintained after being offline, the time for maintaining the valve device 10 is saved by at least 8-48 h, and the maintenance efficiency is improved.

Further, as a specific embodiment of the service rack for valve equipment service provided by the present invention, the service rack further comprises a support assembly 3 provided on the working table 1, wherein the support assembly 3 is used for supporting the second end 102 of the valve body 103 when the roll-over plate 22 is in the second position. When the roll-over plate 22 is at the second position, the axis of the valve body 103 is parallel to the workbench 1, and since the valve device generally has a large weight, the second end 102 of the valve body 103 is supported by the support assembly 3, and the second end 102 of the valve body 103 is prevented from deforming due to the weight, so that when the axis of the valve body 103 is parallel to the workbench 1, the valve body 103 is driven by the turntable 21 to rotate along the axis of the valve body 103 more stably.

Further, referring to fig. 4 in combination, as one embodiment of the service rack for servicing the valve apparatus provided by the present invention, the support assembly 3 includes: the valve body 103 comprises a support frame 31, a first carrier roller 32 and a second carrier roller 33, wherein the first carrier roller 32 and the second carrier roller 33 are oppositely arranged on the support frame 31, the first carrier roller 32 and the second carrier roller 33 can relatively move, and the first carrier roller 32 and the second carrier roller 33 jointly support the second end portion 102 of the valve body 103. In specific implementation, the first carrier roller 32 and the second carrier roller 33 may be symmetrically disposed on the support frame 31 relative to a center line of a top end of the support frame 31, the first carrier roller 32 and the second carrier roller 33 may be close to and away from each other under the action of the support adjusting mechanism 70, the support frame 31 is provided with an arc-shaped groove for accommodating the valve body 103, and when the first carrier roller 32 and the second carrier roller 33 support the second end portion 102 of the valve body 103 together, a portion of the valve body 103 located between the first carrier roller 32 and the second carrier roller 33 is accommodated in the arc-shaped groove. Since the first idler 32 and the second idler 33 are movable, the distance between the first idler 32 and the second idler 33 can be adjusted, and thus the levelness of the valve body 103 can be adjusted.

Further, referring to fig. 3 in combination, as one embodiment of the service rack for valve equipment service provided by the present invention, the support frame 31 may be relatively close to and far from the roll-over plate 22. In specific implementation, the support frame 31 may be relatively close to and far from the roll-over plate 22 in various ways, for example, a plurality of mounting holes 12 may be provided on the workbench 1, and the distance between the support frame 31 and the roll-over plate 22 may be adjusted by mounting the support frame 31 in different mounting holes 12; the bottom of the support frame 31 can also be provided with a roller, meanwhile, the support frame 31 can also be provided with a limiting piece, the distance between the support frame 31 and the turnover plate 22 can be adjusted through the roller, and the position of the support frame 31 can be fixed through the limiting piece; the supporting frame 31 can also be slidably arranged on the workbench 1, and is fixed on the workbench 1 through a limiting piece; the skilled person can select the arrangement according to the actual requirement as long as the distance between the supporting frame 31 and the turning plate 22 can be adjusted. The support frame 31 can be relatively close to and far away from the turnover plate 22, so that the maintenance rack can adapt to valve equipment 10 with different lengths, and the application range and flexibility of the maintenance rack are improved.

Further, as a specific embodiment of the service rack for the valve equipment service provided by the present invention, the service rack further comprises an adjusting member 5 which is provided on the working table 1 and is adjustable in height, and when the valve body 103 is rotated to have its axis perpendicular to the working table 1, the adjusting member 5 is used for supporting the roll-over plate 22. During specific implementation, when the returning face plate 22 overturns to be parallel to the workbench 1, the returning face plate 22 is supported by the adjusting part 5, and the adjusting part 5 can be driven by hydraulic pressure, so that the height of the adjusting part 5 can be adjusted, the levelness of the returning face plate 22 can be adjusted, the verticality of the valve body 103 can be adjusted, and meanwhile, the stability of the valve device 10 in the overhauling process can be ensured. Of course, it is understood that the adjusting member 5 may be driven by other structures, as long as the height of the adjusting member 5 is adjustable, and those skilled in the art can select the setting according to actual needs.

Further, referring to fig. 2 and 4 in combination, as an embodiment of the maintenance rack for valve equipment maintenance provided by the present invention, the maintenance rack further includes a floating support 6 disposed on the work table 1, the floating support 6 is disposed between the support assembly 3 and the roll-over plate 22, and the floating support 6 can move up and down relative to the work table 1 to provide floating support for the valve body 103. In specific implementation, the floating support 6 can move up and down relative to the workbench 1 through the height adjusting mechanism 40, the floating support 6 can include a connecting plate 61 and a supporting plate 62 arranged on the connecting plate 61, the height adjusting mechanism 40 can include a screw 401, a first nut 402 and a second nut 403, one end of the screw 401 is fixed on the workbench 1, the other end of the screw 401 passes through the connecting plate 61, the first nut 402 is in threaded connection with the screw 401 and is positioned below the connecting plate 61, the second nut 403 is in threaded connection with the screw 401 and is positioned above the connecting plate 61, the height of the connecting plate 61 can be adjusted by adjusting the connection positions of the first nut 402 and the second nut 403 with the screw 401, and further the height of the supporting plate 62 can be adjusted; it is understood that the height adjusting mechanism 40 may have other structures as long as it can adjust the height of the floating support 6, and those skilled in the art can select the arrangement according to the actual requirement. When the valve body 103 needs to rotate around the axis of the valve body 103 relative to the roll-over plate 22, the floating support 6 is adjusted downward so that the floating support 6 is separated from the outer wall of the valve body 103, and then the valve body 103 rotates around the axis of the valve body 103 relative to the roll-over plate 22; when the valve body 103 needs to be turned over to the position that the axis of the valve body 103 is perpendicular to the workbench 1, the floating support piece 6 is adjusted upwards, so that the floating support piece 6 supports the outer wall of the valve body 103, and the safety and the stability of the valve body 103 in the turning process are guaranteed. Through the setting of floating support piece 6, when overhauing the longer valve equipment 10 of axial length, can guarantee the security and the stability of valve body 103 in the upset in-process.

Further, referring to fig. 2 in combination, as an embodiment of the service rack for valve equipment service provided by the present invention, the service rack further includes a bracket 7, the bracket 7 is detachably provided on the working table 1, and the floating support member 6 is provided on the bracket 7. In specific implementation, since the floating support member 6 is provided on the bracket 7, and the bracket 7 is detachably provided on the table 1, the bracket 7 can be detached from the table 1 when the axial length of the valve apparatus 10 to be overhauled is short, or the like, without using the floating support member 6.

Further, referring to fig. 2 in combination, as one embodiment of the service rack for servicing the valve equipment provided by the present invention, level gauges 214 are provided on two adjacent side walls of the roll-over panel 22. Because the level 214 is arranged on two adjacent side walls of the turnover plate 22, the levelness and the verticality of the valve body 103 can be conveniently known, so that the levelness and the verticality of the valve body 103 can be conveniently adjusted.

Further, referring to fig. 6 and 7 in combination, as a specific embodiment of the service rack for valve equipment service provided by the present invention, the hoisting assembly 4 comprises: the suspension lifting device comprises a cantilever lifting frame 41 and a lifting frame support 42, wherein the cantilever lifting frame 41 comprises an upright column 411, a cantilever lifting beam 412 and a lifting piece 413, the upright column 411 is arranged on the workbench 1, one end of the cantilever lifting beam 412 is rotatably arranged at the top end of the upright column 411, the lifting piece 413 is used for lifting the valve body 103 and the valve member 104, and the lifting piece 413 can slide relative to the cantilever lifting beam 412; the hanger support 42 is used to support the end of the cantilever beam 412 remote from the column 411. In specific implementation, the cantilever hanging beam 412 can be driven to rotate 360 degrees relative to the upright column 411 through the rotation driving mechanism 90, a sliding guide rail can be arranged on the cantilever hanging beam 412, the hoisting piece 413 can comprise a pulley 4131 and a hoist 4132, the pulley 4131 can slide on the sliding guide rail, and the hoist 4132 can be used for hoisting. Through the 360 ° rotation of the cantilever beam 412 and the cooperation of the trolley 4131, the hoist 4132 can reach any position within the range of travel. The hoisting support 42 can be disposed on the working platform 1, or disposed in a space outside the working platform 1, the hoisting support 42 can be provided with casters 426, the hoisting support 42 can be moved by the casters 426, and when a heavy object is hoisted, the hoisting support 42 can be moved to the lower side of the cantilever hanging beam 412 by the casters 426 to support the cantilever hanging beam 412. The hanger support 42 may further include: the multi-stage oil cylinder 423 is arranged on the bottom plate 424, the ground support 425 is arranged below the bottom plate 424, positioning of hoisting support can be achieved through the ground support 425, and the hoisting support 42 is guaranteed to provide stable support for the cantilever hanger 41; when multi-stage cylinder 423 is in the retracted position, the lifting support is moved by casters 426 into substantial alignment with the end of boom hoist 412 remote from column 411, and multi-stage cylinder 423 is then extended, actuating support flange 422 to support the end of boom hoist 412 remote from column 411 and positioned by guide locator pin 421. Through the arrangement of the hoisting support 42, when the cantilever hoisting beam 412 needs to hoist heavy equipment, such as the valve body 103, the cantilever hoisting beam 412 can be supported through the hoisting support 42 to form a door type hoisting structure, so that the bearing capacity and stability of the cantilever hoisting beam 412 are guaranteed.

Further, referring to fig. 1 to 3 in combination, as a specific embodiment of the maintenance platform for valve equipment maintenance provided by the present invention, the maintenance platform further includes a movable wheel 8, and the movable wheel 8 is disposed below the workbench 1. During specific implementation, the movable wheels 8 can be directly arranged below the workbench 1, or the workbench 1 can be assembled on the auxiliary platform 50 or the auxiliary base 60, the auxiliary platform 50 or the auxiliary base 60 can provide operation space support for maintenance work, and the movable wheels 8 are arranged below the auxiliary platform 50 or the auxiliary base 60, so long as the maintenance rack can be moved, and the arrangement can be selected by a person skilled in the art according to needs. A ground support oil cylinder 13 can be arranged below the workbench 1, and after the maintenance rack is moved to a maintenance site to be in place, the levelness of the maintenance rack can be supported and adjusted through the plurality of ground support oil cylinders 13; it is understood that the ground supporting cylinder 13 may be disposed under the auxiliary platform 50 or the auxiliary base 60 if the work table 1 is assembled on the auxiliary platform 50 or the auxiliary base 60. In one embodiment, the traction rod 14 may be provided on the work bench 1, and the maintenance platform may be integrally towed to the maintenance site by a vehicle, and similarly, if the work bench 1 is assembled on the auxiliary platform 50 or the auxiliary base 60, the traction rod 14 may be provided on the auxiliary platform 50 or the auxiliary base 60. In an embodiment, when the working platform 1 is assembled on the auxiliary platform 50 or the auxiliary base 60, the lifting platform 100 may be disposed on the auxiliary platform 50 or the auxiliary base 60, and the lifting platform 100 is driven by a hydraulic cylinder to lift, so that an operator or an inspection machine can reach a proper working height; when the lifting platform 100 is not lifted, the lifting platform is flush with the workbench 1, so that the maintenance work carried out on the auxiliary platform 50 or the auxiliary base 60 is not influenced, and the detachable guard rails can be installed on the periphery of the lifting platform 100 after the lifting platform is lifted.

Further, referring to fig. 2, as a specific embodiment of the maintenance rack for valve equipment maintenance provided by the present invention, a plurality of sets of distance measuring devices 9 are disposed on one side of the turning plate 22 where the rotating disc 21 is disposed. By arranging the distance measuring instrument 9, the information such as the size and the height difference of the installation position of the detected valve device 10 or parts thereof can be measured when the valve device 10 is in the horizontal and vertical maintenance states, and reference data is provided for maintenance work.

Further, as a specific implementation mode of the maintenance rack for valve equipment maintenance provided by the invention, the maintenance rack can be provided with a telescopic airtight canopy so as to adapt to outdoor all-weather maintenance operation and cleanliness control of dust prevention, moisture prevention and the like in the maintenance process.

The invention provides an overhaul rack for valve equipment overhaul, when valve equipment 10 needs to be overhauled, the overhaul rack is pulled to an overhaul site through a traction rod 14, a power supply is switched on, and a ground support oil cylinder 13 extends out and is horizontally adjusted; the hoisting support moves to the end of the cantilever hoisting beam 412 far away from the upright column 411 through the caster 426 to be basically aligned, then the multistage oil cylinder 423 is extended, the support flange 422 is driven to support the end of the cantilever hoisting beam 412 far away from the upright column 411, and the end is positioned through the guide positioning pin 421; the valve body 103 is hoisted to an overhauling rack through a hoisting piece 413, at the moment, an adaptive flange 211 or a chuck clamp 212 is selectively installed on the rotary table 21 according to the structure and the size of the valve body 103, the first end part 101 of the valve body 103 is fixed on the rotary table 21 through the adaptive flange 211 or the chuck clamp 212, the second end part 102 of the valve body 103 is supported through the supporting component 3, and the levelness of the valve body 103 is adjusted by adjusting the distance between the first carrier roller 32 and the second carrier roller 33, so that the axis of the valve body 103 is in the horizontal position; the floating support piece 6 is adjusted downwards, so that the floating support piece 6 is separated from the outer wall of the valve body 103, the rotating speed reduction motor 242 drives the driving gear 241 to rotate, the driving gear 241 drives the rotating disc 21 to rotate, the rotating disc 21 drives the valve body 103 to rotate around the axis of the valve body 103 relative to the turnover plate 22, and the valve rod is dismounted through the hoisting piece 413; the floating support piece 6 is adjusted upwards, the floating support piece 6 is enabled to support the outer wall of the valve body 103, the two groups of overturning oil cylinders retract, the overturning plate 22 is overturned to be parallel to the workbench 1, the adjusting piece 5 is driven by hydraulic pressure, the adjusting piece 5 is enabled to support the overturning plate 22, the verticality of the valve body 103 is adjusted through the height of the hydraulic adjusting piece 5, and the valve plate and the like are disassembled through the hoisting piece 413. After the maintenance is completed, the valve rod and the valve plate can be mounted on the valve body 103 by reversely operating the steps.

The maintenance rack for the valve equipment maintenance provided by the invention has the following advantages:

(1) the maintenance work can be completed in the vacant places such as a stock yard outside the equipment factory building, an idle road and the like, and the equipment factory building field and the equipment such as a travelling crane are not occupied; the maintenance work does not need to be coordinated with the field work, the large valve device 10 can be maintained after being offline, the time for maintaining the valve device 10 is saved by at least 8-48 h, and the maintenance efficiency is improved;

(2) the rotation of the large valve device 10 and the adjustment of the levelness of the axis can be finished within 5min, the overturning of the large valve device 10 and the adjustment of the verticality of the axis can be finished within 10min, and the disassembly or reinstallation operation saves 6-8 h time compared with the traditional overhauling method;

(3) by using the maintenance rack for valve equipment maintenance, the rotation and the overturning of the large valve equipment 10 are controllable, uniform, stable and free of impact, and the damage risk of the equipment is greatly reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.