1. The utility model provides a top-mounted formula superhigh temperature high pressure ball valve sealed firmly which characterized in that includes: the ball valve comprises a valve body and a ball valve assembly which is detachably and fixedly connected inside the valve body;

the top of the valve body is provided with an opening, and the opening is provided with a valve cover;

the ball valve assembly includes: the sealing valve seat assembly is in threaded fit with the flow channel on one side of the valve body, the upstream valve seat assembly is arranged opposite to the sealing valve seat assembly, and the ball core is connected between the sealing valve seat assembly and the upstream valve seat assembly in a sealing and rotating mode; wherein the content of the first and second substances,

the upstream valve seat assembly is in sealing fit with the flow channel on the other side of the valve body through a locking screw;

an anti-rotation pressing plate for limiting the anti-loosening screw is detachably and fixedly connected to the valve body;

the ball valve assembly further comprises a valve rod which is connected with the anti-rotation pressing plate in a sealing and rotating mode, one end of the valve rod is connected with the ball core, the other end of the valve rod penetrates through the valve cover, and a wear-resistant bushing matched with the valve rod is arranged inside the valve cover.

2. The top-loading superhigh temperature and high pressure hard sealed ball valve as set forth in claim 1, wherein the valve body has a mounting cavity for assembling the ball valve assembly.

3. The top-loading superhigh temperature and pressure hard-sealing ball valve as set forth in claim 2, wherein the valve body has upstream and downstream flow passages on two opposite sides and communicated with the mounting cavity.

4. The top-loading ultra-high temperature and high pressure hard-sealed ball valve of claim 3, wherein the sealing seat assembly comprises: the sealing valve seat is in threaded connection with the downstream flow passage;

the downstream flow channel is provided with a sealing sleeve, and the sealing valve seat is sleeved with a sealing gasket matched with the sealing sleeve.

5. The top-loading superhigh temperature and high pressure hard sealing ball valve as set forth in claim 4, wherein the face of the sealing valve seat facing the ball core is provided with an outer hexagonal sleeve, and the outer hexagonal sleeve is provided with a chamfer matched with the ball core in a sealing way.

6. The top-loading ultra-high temperature and high pressure hard-sealed ball valve of claim 2, wherein the upstream seat assembly comprises: the adjusting tray is assembled on the upstream runner, and an upstream valve seat is sleeved on the adjusting tray through a disc spring;

and a groove for fixing the adjusting tray and the upstream valve seat is formed in the side wall of the anti-loosening screw.

7. The top-loading superhigh temperature and high pressure hard sealed ball valve according to claim 6, wherein the number of the check screws is two, and the two check screws are symmetrically positioned at two sides of the upstream valve seat assembly.

8. The top-mounted superhigh temperature and high pressure hard sealed ball valve according to claim 7, wherein the top of the anti-loosening screw is provided with an outer hexagonal socket head, and the anti-rotation pressing plate is provided with a hexagonal hole matched with the outer hexagonal socket head.

9. The top-mounted superhigh temperature and high pressure hard sealed ball valve according to any one of claims 2 to 8, wherein the anti-rotation pressure plate is connected with the valve seat through a bolt, and seals the mounting cavity.

10. The top-loading superhigh temperature and high pressure hard sealed ball valve as set forth in claim 1, wherein the end of the valve stem far from the ball core is connected with a handle through the valve cover.

Background art:

with the development of industrialization, the requirements on the valve are higher and higher. The ball body for the ball valve is used as an opening and closing part, has the advantages of small flow resistance, small pressure loss, reliable sealing, simple and convenient operation and the like, is trusted by customers, has wide application range, and is particularly applied to industries such as petroleum, chemical engineering, natural gas, electric power, metallurgy, pharmacy, building, water supply and the like more and more. In the ball valve products in the current market, the internal parts are mainly in a side-mounted mode, after the ball valve products are used on line, the internal parts are not easy to maintain and replace, and in order to replace and maintain the internal parts, the valve body must be separated from a pipeline, so that the maintenance is troublesome and the cost is high. The upper-mounted ball valve is simple and rapid to disassemble on a pipeline, and convenient and rapid to maintain. When the valve breaks down on the pipeline and needs to be repaired, the valve does not need to be disassembled from the pipeline, only the flange bolt and the nut need to be disassembled, the valve cover and the valve rod assembly are taken down from the valve body together, and then the ball body and the valve seat assembly are taken out, so that the ball body and the valve seat can be repaired on line. This maintenance saves time and minimizes losses in production.

But the existing metal hard seal ball valve has the defects of high processing difficulty, unreliable assembly seal and poor maintainability.

The invention content is as follows:

in view of this, it is necessary to design a top-mounted ultrahigh-temperature high-pressure hard seal ball valve to meet the requirements of full processing, simple and convenient assembly and online replacement and maintenance of the metal hard seal ball valve.

The utility model provides a top-mounted formula superhigh temperature high pressure ball valve sealed firmly which characterized in that includes: the ball valve comprises a valve body and a ball valve assembly which is detachably and fixedly connected inside the valve body;

the top of the valve body is provided with an opening, and the opening is provided with a valve cover;

the ball valve assembly includes: the sealing valve seat assembly is in threaded fit with the flow channel on one side of the valve body, the upstream valve seat assembly is arranged opposite to the sealing valve seat assembly, and the ball core is connected between the sealing valve seat assembly and the upstream valve seat assembly in a sealing and rotating mode; wherein the content of the first and second substances,

the upstream valve seat assembly is in sealing fit with the flow channel on the other side of the valve body through a locking screw;

an anti-rotation pressing plate for limiting the anti-loosening screw is detachably and fixedly connected to the valve body;

the ball valve assembly further comprises a valve rod which is connected with the anti-rotation pressing plate in a sealing and rotating mode, one end of the valve rod is connected with the ball core, the other end of the valve rod penetrates through the valve cover, and a wear-resistant bushing matched with the valve rod is arranged inside the valve cover.

Preferably, the valve body is internally provided with an installation cavity for assembling the ball valve assembly.

Preferably, an upstream flow channel and a downstream flow channel communicated with the mounting cavity are oppositely arranged on two sides of the valve body.

Preferably, the sealing valve seat assembly comprises: the sealing valve seat is in threaded connection with the downstream flow passage;

the downstream flow channel is provided with a sealing sleeve, and the sealing valve seat is sleeved with a sealing gasket matched with the sealing sleeve.

Preferably, one surface of the sealing valve seat facing the ball core is provided with an outer hexagonal sleeve, and the outer hexagonal sleeve is provided with a chamfer matched with the ball core in a sealing manner.

Preferably, the upstream seat assembly comprises: the adjusting tray is assembled on the upstream runner, and an upstream valve seat is sleeved on the adjusting tray through a disc spring;

and a groove for fixing the adjusting tray and the upstream valve seat is formed in the side wall of the anti-loosening screw.

Preferably, the number of the check screws is two, and the two check screws are symmetrically positioned on two sides of the upstream valve seat assembly.

Preferably, the top of the anti-loosening screw is provided with an outer hexagonal sleeve head, and the anti-rotating pressing plate is provided with a hexagonal hole matched with the outer hexagonal sleeve head.

Preferably, the anti-rotation pressing plate is connected with the valve seat through a bolt, and the anti-rotation pressing plate seals the installation cavity.

Preferably, one end of the valve rod, which is far away from the ball core, penetrates through the valve cover to be connected with a handle.

According to the invention, the inner cavity of the valve body is processed through the upper part, so that the processing difficulty of the valve is reduced, the ball valve assembly is installed from the upper part of the valve body, the assembly and disassembly of parts are simple and convenient, the complete exchange of maintenance is realized, and the maintenance cost is reduced; and the tightness and reliability of the valve can be further ensured by adjusting and matching the sealing valve seat assembly and the upstream valve seat assembly.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a top-mounted superhigh temperature and high pressure hard seal ball valve according to the present invention;

FIG. 2 is a schematic structural view of a valve body provided by the present invention;

fig. 3 is a schematic structural view of a sealing valve seat assembly provided by the present invention;

fig. 4 is a schematic structural diagram of the compression screw provided by the present invention.

In the figure, a valve body 1, a locking screw 2, an adjusting tray 3, a disc spring 4, an upstream valve seat 5, a ball core 6, a sealing gasket 7, a sealing valve seat 8, an anti-rotation pressing plate 9, a valve rod 10, a winding pad 11, a valve cover 12, a first nut 13, a bolt 14, a first inner hexagonal screw 15, a support 16, a stud bolt 17, a second nut 18, a handle 19, a gasket 20, a second inner hexagonal screw 21, a ball bearing 22, a packing pressing plate 23, a packing gland lining ring 24, a packing gland 25, a combined packing 26, a packing lining 27, a wear-resistant lining 28, an installation cavity 29, an upstream flow passage 30 and a downstream flow passage 31.

The specific implementation mode is as follows:

as shown in the attached figures 1-2, the upper-mounted type ultrahigh-temperature high-pressure hard sealing ball valve comprises: valve body 1 and detachable fixed connection are at the inside ball valve subassembly of valve body 1. The valve body 1 in the embodiment of the application adopts an integrated box type design, the top of the valve body 1 is opened, and the installation cavity 29 for assembling the ball valve assembly is arranged in the valve body 1.

The installation cavity 29 of the valve body 1 is processed from the upper part, so that the difficulty of valve processing is reduced, the ball valve assembly is installed from the upper part of the valve body 1, the assembly and the disassembly of parts are simple and convenient, the sealing is reliable, the complete exchange of maintenance is realized, and the maintenance cost of customers is reduced.

The valve body 1 is provided at opposite sides thereof with an upstream flow passage 30 and a downstream flow passage 31 communicating with the mounting cavity 29. The ball valve assembly includes: a sealing valve seat assembly threadably engaged with downstream flow passage 31. As shown in fig. 3, the sealing valve seat assembly is screwed to the downstream flow passage 31, and the position of the sealing valve seat assembly can be adjusted while the downstream flow passage 31 is sealingly connected.

Specifically, the sealing valve holder assembly includes: a seal valve seat 8 screwed to the downstream flow passage 31; the downstream flow channel 31 is provided with a sealing sleeve, and the sealing valve seat 8 is sleeved with a sealing gasket 7 matched with the sealing sleeve. The exposed surface of the sealing valve seat 8 is provided with an outer hexagonal kit, and the outer hexagonal kit is provided with a chamfer. Through threaded connection in the downstream runner 31 inboard, the installation is guaranteed in the design of outer hexagonal external member, dismantles and adjusts simply swiftly.

With continued reference to fig. 1, the ball valve assembly further includes an upstream valve seat assembly disposed opposite the sealing valve seat assembly; the upstream valve seat assembly is in sealing fit with the upstream flow passage 30 through the anti-loose screw 2. The valve body 1 is detachably and fixedly connected with an anti-rotation pressing plate 9 used for limiting the anti-loosening screw 2.

The upstream seat assembly includes: an adjusting tray 3 assembled on the upstream flow passage 30, and an upstream valve seat 5 sleeved on the adjusting tray 3 through a disc spring 4. As shown in fig. 4, the side wall of the locking screw 2 is opened with a groove for fixing the adjustment tray 3 and the upstream valve seat 5.

The number of the check screws 2 is two, and the two check screws 2 are symmetrically arranged on two sides of the upstream valve seat assembly. And the top of the anti-loosening screw 2 is provided with an outer hexagonal sleeve head, and the anti-rotating pressing plate 9 is provided with a hexagonal hole matched with the outer hexagonal sleeve head. The anti-rotation pressure plate 9 is connected with the valve seat through a bolt 14, and the anti-rotation pressure plate 9 is hermetically installed with a cavity 29.

Also included is a core 6 sealingly and rotatably connected between a sealing valve seat 8 and the upstream valve seat 5. The ball core 6 is matched and sealed with a sealing valve seat 8 and a chamfer on the outer hexagonal sleeve.

As can be seen from the above description, the detachable movable sealing valve seat 8 and the sealing gasket 7 are connected to the inner side of the downstream flow channel 31 through threads, and the external hexagonal kit is designed to ensure the installation and is simple and quick to detach; the adjusting tray 3 contains the disc spring 4 and the upstream valve seat 5 inside, and the position of the valve seat can be adjusted from the inside, so that the sealing surface of the valve seat and the sealing surface of the ball core 6 are completely contacted and attached.

The top of the anti-loosening screw 2 is provided with an outer hexagonal sleeve head structure and a groove designed on the side part, so that the adjusting tray 3 and the upstream valve seat 5 can be conveniently and fixedly installed. After the internal part is installed, the anti-loosening screw 2 rotates 90 degrees, and the effect of pressing the internal part from the side face can be achieved, so that the tightness and reliability of sealing are guaranteed. The anti-rotation pressing plate 9 is provided with a hexagonal hole and is installed with the anti-loosening screw 2 from the upper part in a matching way. The anti-rotation pressure plate 9 is fastened on the valve body 1 through screws, so that the anti-loosening screws 2 are prevented from moving up and down, the upstream valve seat 5 is prevented from deviating, and the tightness and reliability of the valve are further guaranteed.

With continuing reference to fig. 1, in addition, the top-mounted superhigh temperature and high pressure hard seal ball valve further comprises a valve cover 12 connected to the valve body 1 through a bolt 14, and a first nut 13 matched with the bolt 14 is used for pressing the valve cover 12. And the surface of the valve cover 12 matched with the valve body 1 is provided with a winding pad 11.

The ball valve assembly also comprises a valve rod 10 which is connected with an anti-rotation pressing plate 9 in a sealing and rotating mode, one end of the valve rod 10 is connected with the ball core 6, the other end of the valve rod 10 penetrates through a valve cover 12, and a packing pressing plate 23 matched with the valve rod 10, a stud bolt 17 used for fixing the packing pressing plate 23 and a second nut 18 matched with the stud bolt 17 are arranged inside the valve cover 12; and, packing gland 25 packing ring 24, packing gland 25, combined packing 26, packing liner 27, wear-resistant bush 28; so that the valve stem 10 is prevented from coming off and wearing while ensuring the airtightness when the valve stem 10 is rotated inside the bonnet 12. Are well known in the art and will not be described in any greater detail herein.

The end of the valve stem 10 remote from the ball core 6 is connected through the bonnet 12 to a handle 19. The handle 19 is connected to the bonnet 12 via a bracket 16, and the bracket 16 and the bonnet 12 are connected by a first socket head cap screw 15. The handle 19 is connected with the valve rod 10 through a second socket head cap screw 21, and the bracket 16 is provided with a gasket 20 for pressing the handle 19 and a ball bearing 22 for sleeving the rotating shaft of the handle 19, so that the handle 19 rotates and simultaneously drives the ball core 6 to rotate.

According to the invention, the inner cavity of the valve body 1 is processed at the upper part, so that the difficulty of valve processing is reduced, and the ball valve assembly is installed from the upper part of the valve body 1, so that the assembly and disassembly of parts are simple and convenient, the complete exchange of maintenance is realized, and the maintenance cost is reduced; and the tightness and reliability of the valve are further ensured by the adjusting and matching between the sealing valve seat 8 component and the upstream valve seat 5 component.