1. A grinding machine for a steel template of a railway prefabricated box girder comprises a main truss and a power control system, wherein the main truss is used for copying the steel template and stretching across the steel template, the section shape of the main truss is basically consistent with that of the box girder and is bilaterally symmetrical, and the lower edge line of the section of the main truss is basically parallel and relatively inosculated with that of the steel template; the travelling mechanism comprises travelling wheels arranged at the bottom of the door-shaped frame, and the travelling wheels fall on rails on two sides of the top of the pouring pedestal of the box girder; the surface of the steel template is divided into seven sections of surfaces, namely a flange plate side surface, an upper flange plate surface, a lower flange plate surface, an external corner circular arc surface, a web surface, an internal corner circular arc surface and a bottom template surface, wherein a first polishing roller mechanism, a second polishing roller mechanism, a third polishing roller mechanism, a fourth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a third polishing roller mechanism, a fourth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a third polishing roller mechanism and a third polishing roller mechanism are symmetrically arranged along the lower edge of the main truss from the end of the main truss, are opposite to the flange plate side surface and used for polishing the flange plate side surface, and are respectively and symmetrically arranged along the upper edge of the main truss, the upper flange plate surface, and the lower edge of the main truss, and are opposite to the upper edge, the lower edge of the main truss, the lower edge, the end of the lower edge of the main truss, the main truss is opposite to the upper edge, the lower edge, the end of the upper edge, the lower edge, the end of the lower edge, the upper edge of the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower, The seventh grinding roller mechanism is correspondingly matched with the bottom template surface and is used for grinding the bottom template surface; the grinding rollers of adjacent grinding roller mechanisms are parallel to each other in the front and back direction along the movement direction of the grinding machine and are provided with staggered overlapping sections.

2. A grinding machine for steel templates of railway precast box girders according to claim 1, characterized in that: the first grinding roller of the first grinding roller mechanism is vertical and is attached to the flange plate surface, the included angle between the second grinding roller of the second grinding roller mechanism and the horizontal plane is 4 degrees and is attached to the upper flange plate surface, the included angle between the third grinding roller of the third grinding roller mechanism and the horizontal plane is 10 degrees and is attached to the lower flange plate surface, the fourth grinding roller of the fourth grinding roller mechanism is made into a waist drum shape with a concave arc surface and is attached to the external corner arc surface, the fifth grinding roller of the fifth grinding roller mechanism is 76 degrees and is attached to the flange plate surface, the sixth grinding roller of the sixth grinding roller mechanism is made into a cylinder shape with a convex arc surface and is attached to the concave corner arc surface, and the seventh grinding roller of the seventh grinding roller mechanism is made into a horizontal cylinder shape and is fully attached to the bottom template surface.

3. A grinding machine for steel templates of railway precast box girders according to claim 1, characterized in that: the two ends of the cantilever frame are both provided with lifting brackets, sliding grooves are formed on the inner sides of the vertical frames on the two sides of the portal frame, and the two sides of each lifting bracket are embedded into the sliding grooves; a screw rod is arranged at the top of the lifting bracket in a penetrating way; one end of the screw rod is fixed to the top of the portal frame, the other end of the screw rod is in threaded connection with the thread driver, and the thread driver and the fixing seat of the thread driver are fixed to the two vertical inner side walls of the lifting support.

4. A grinding machine for steel templates of railway precast box girders according to claim 1, characterized in that: the polishing roller mechanisms respectively comprise a hanging plate connected to the lower edge of the main truss, a rotating shaft arranged on the hanging plate, a polishing driving device, a driver and a polishing roller sleeved on the rotating shaft, and abrasive materials are attached to the surface of the polishing roller.

5. A grinding machine for steel templates of railway precast box girders according to claim 4, characterized in that: still including setting up the dust collector on the main part truss, power control system includes external power supply's electric cabinet, running gear is still including the base of locating door type frame bottom, locating driver and the walking motor on the base, grinding driving device is grinding motor, the driver is the chain, dust collector includes fan, pipeline and suction opening, the electric cabinet with grinding motor, walking motor and fan pass through the cable and form automatically controlled connection.

6. A grinding machine for steel molding plates of precast box girders for railways according to any one of claims 1 to 5, characterized in that: the horizontal chord member, vertical chord member, pole setting and bracing of main part truss adopt square pipe to weld each other and form, the top of main part truss is laid by the steel sheet.

7. A grinding machine for steel templates of railway precast box girders according to claim 4, characterized in that: and a jacking screw rod and a compression spring are arranged at the two ends of the hanging plate and the grinding roller.

Background

The construction of the high-speed railway mainly takes a prestressed concrete simply-supported box girder bridge and a continuous box girder bridge as main parts, and the prefabrication construction technology of the railway standard span simply-supported box girder is mature along with the rapid development and the improvement of the mechanization degree of a national railway system. At present, the prefabricated box girders for railways are all formed by pouring concrete through steel templates, and after one box girder is poured, condensed concrete always remains on the surfaces of the steel templates, so that the surfaces of the steel templates need to be polished to repeatedly use the steel templates for pouring the next box girder. The surface of the steel template of the railway precast box girder mainly comprises a pair of flange plate surfaces, a pair of side template surfaces and a bottom template surface which are bilaterally symmetrical, wherein the area of the side template is the largest, the surface area of the side template is about 540 square meters according to the size of the box girder of 32 meters commonly used for the high-speed railway, and the workload is huge if the side template is completely polished once by manpower.

For example, chinese patent publication No. CN 109318354A discloses an integrated device for automatically polishing, dedusting and spraying a box girder template, which adopts a frame for profiling the surface of the steel template, and a plurality of polishing wire heads (about hundreds) are arranged on the frame, and each polishing wire head is provided with a driving motor, and thus, a large number of motors and cables for the motors are required, so that the device is very complicated in production, manufacture, operation, replacement and maintenance, and is difficult to popularize in practice. In addition, the device is provided with four groups of travelling wheel mechanisms, wherein two groups of travelling wheel mechanisms fall on the bottom die surface of the steel template, so that the partial surface of the inner die covered by the travelling wheel cannot be polished, and the local abrasion leakage of the surface of the steel template is formed. In addition, the pressure of hundreds of grinding steel wire ends is not easy to be kept consistent, so that the grinding quantity of the surface of the steel template is different in depth.

Further, chinese patent publication No. CN203418396U discloses an integral box girder grinding machine, which is provided with an electromagnetic grinding template matching the radial cross-sectional shape of the box girder, wherein the grinding template is provided with a plurality of grinding holes uniformly distributed, and grinding wheels (the number of which is also large) are disposed in the grinding holes. Although the grinding machine has a plurality of holes and grinding wheels, the parts between the holes cannot be contacted and ground by the grinding wheels, so that the surface of the steel template is partially abraded. In addition, the grinding pressure provided by the grinding template by utilizing the electromagnetic principle is not clear, and in addition, the quantity of the grinding wheels is large, so that the uniformity of the grinding quantity of the surface of the steel template is difficult to ensure.

The excessive or insufficient condition of volume of polishing all appears easily at the in-process of polishing in above-mentioned prior art, produces adverse effect to the efficiency of construction of railway precast box girder and the appearance quality control of precast box girder.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the steel formwork surface of the railway precast box girder is not missed and accurately polished by using fewer polishing wheels.

The technical scheme provided by the invention for solving the technical problems is as follows: a grinding machine for a steel template of a railway prefabricated box girder comprises a main truss and a power control system, wherein the main truss is used for profiling the steel template and stretching across the steel template, the section shape of the main truss is basically consistent with that of the box girder and is bilaterally symmetrical, the lower edge line of the section of the main truss is basically parallel and relatively inosculated with that of the steel template, the upper half part of the main truss forms a cantilever frame extending towards two ends, the lower half part of the main truss forms a trapezoidal frame, and two ends of the cantilever frame are respectively provided with two identical travelling mechanisms, a door-shaped frame and a lifting mechanism; the travelling mechanism comprises travelling wheels arranged at the bottom of the door-shaped frame, and the travelling wheels fall on rails on two sides of the top of the pouring pedestal of the box girder; the surface of the steel template is divided into seven sections of surfaces, namely a flange plate side surface, an upper flange plate surface, a lower flange plate surface, an external corner circular arc surface, a web surface, an internal corner circular arc surface and a bottom template surface, wherein a first polishing roller mechanism, a second polishing roller mechanism, a third polishing roller mechanism, a fourth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a third polishing roller mechanism, a fourth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a fifth polishing roller mechanism, a sixth polishing roller mechanism, a third polishing roller mechanism and a third polishing roller mechanism are symmetrically arranged along the lower edge of the main truss from the end of the main truss, are opposite to the flange plate side surface and used for polishing the flange plate side surface, and are respectively and symmetrically arranged along the upper edge of the main truss, the upper flange plate surface, and the lower edge of the main truss, and are opposite to the upper edge, the lower edge of the main truss, the lower edge, the end of the lower edge of the main truss, the main truss is opposite to the upper edge, the lower edge, the end of the upper edge, the lower edge, the end of the lower edge, the upper edge of the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower edge, the upper edge, the lower, The seventh grinding roller mechanism is correspondingly matched with the bottom template surface and is used for grinding the bottom template surface; the grinding rollers of adjacent grinding roller mechanisms are parallel to each other in the front and back direction along the movement direction of the grinding machine and are provided with staggered overlapping sections.

The invention has the beneficial effects that: 1) the upper half part of the main truss of the grinding machine forms a cantilever frame extending towards two ends, and the two ends of the cantilever frame are provided with the travelling mechanism and the lifting mechanism, so that the whole grinding machine can be suspended on rails on two sides of the top of a pouring pedestal of a railway prefabricated box girder, all the surfaces of the steel template can be covered by all the grinding roller mechanisms arranged from the lower edge to the two ends of the cross section of the main truss, and all the grinding roller mechanisms can form uniform pressure on all the surfaces of the steel template through the integral lifting of the main truss, so that all the surfaces of the steel template can be precisely ground; 2) the surface of the steel template is divided into seven sections of surfaces of the flange plate side surface, the upper flange plate surface, the lower flange plate surface, the external corner circular arc surface, the web surface, the internal corner circular arc surface and the bottom template surface, particularly, the side template surfaces are divided in sections, and then seven grinding roller mechanisms which can be relatively matched with the seven sections of surfaces are correspondingly arranged, so that compared with the existing grinding machine, the quantity of the grinding roller mechanisms can be greatly reduced on the basis of covering all the surfaces of the steel template, and the seven grinding roller mechanisms are mutually parallel front and back and form a staggered and overlapped length, so that all the surfaces of the steel template can be covered by the grinding rollers, and the condition that all the surfaces of the steel template are polished without omission is ensured.

Further, a first polishing roller of the first polishing roller mechanism is vertical and is attached to the flange plate surface, a second polishing roller of the second polishing roller mechanism has an included angle of 4 degrees with a horizontal plane and is attached to the upper flange plate surface, a third polishing roller of the third polishing roller mechanism has an included angle of 10 degrees with the horizontal plane and is attached to the lower flange plate surface, a fourth polishing roller of the fourth polishing roller mechanism is made into a waist drum shape with a concave arc surface and is attached to the external corner arc surface, a fifth polishing roller of the fifth polishing roller mechanism has an included angle of 76 degrees with the horizontal plane and is attached to the flange plate surface, a sixth polishing roller of the sixth polishing roller mechanism is made into a cylinder shape with a convex arc surface and is attached to the concave corner arc surface, and a seventh polishing roller of the seventh polishing roller mechanism is cylindrical and is fully attached to the bottom template surface.

Furthermore, two ends of the cantilever frame are respectively provided with a lifting support, sliding grooves are formed on the inner sides of the vertical frames on two sides of the portal frame, and two sides of the lifting support are embedded into the sliding grooves; a screw rod is arranged at the top of the lifting bracket in a penetrating way; one end of the screw rod is fixed to the top of the portal frame, the other end of the screw rod is in threaded connection with the thread driver, and the thread driver and the fixing seat of the thread driver are fixed to the two vertical inner side walls of the lifting support.

Furthermore, the grinding roller mechanisms respectively comprise a hanging plate connected to the lower edge of the main truss, a rotating shaft arranged on the hanging plate, a grinding driving device, a driver and a grinding roller sleeved on the rotating shaft, and grinding materials are attached to the surface of the grinding roller.

Further, still including setting up the dust collector on the main part truss, power control system includes external power supply's electric cabinet, running gear is still including the base of locating door type frame bottom, locating driver and the walking motor on the base, the drive arrangement that polishes is grinding motor, the driver is the chain, dust collector includes fan, pipeline and suction opening, the electric cabinet with grinding motor, walking motor and fan pass through the cable and form automatically controlled connection.

Further, the transverse chord, the longitudinal chord, the vertical rod and the inclined strut of the main truss are formed by welding square pipes, and a steel plate is laid on the top of the truss.

Furthermore, the two ends of the hanging plate and the grinding roller are provided with a jacking screw rod and a compression spring.

Drawings

The steel form of the railway precast box girder of the present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a general schematic perspective view of a grinder for a steel form of a precast box girder for a railway according to an embodiment.

FIG. 2 is a general schematic view of a plane structure of a grinding machine for a steel form of a precast box girder for a railway in the embodiment.

Fig. 3 is a schematic structural view of a third sharpening roller mechanism in the embodiment.

Fig. 4 is a schematic structural view of the first sharpening roller mechanism in the embodiment.

Fig. 5 is a schematic structural view of a fourth sharpening roller mechanism in the embodiment.

Fig. 6 is a schematic structural view of a sixth sharpening roller mechanism in the embodiment.

Detailed Description

Examples

The grinding machine for the steel template of the railway precast box girder comprises a main truss 1 and a power control system, wherein the main truss 1 is used for profiling the steel template 5 and spans the steel template 5, the power control system is used for controlling the main truss 1, the section shape of the main truss 1 is basically consistent with that of the box girder and is in bilateral symmetry, the lower edge of the section of the main truss 1 is basically in relative parallel and consistent with that of the steel template, the upper half of the main truss 1 forms a cantilever frame extending towards two ends, the lower half of the main truss 1 forms a trapezoidal frame, and two identical travelling mechanisms 4, a door-shaped frame 3-1 and a lifting mechanism 3 are arranged at two ends of the cantilever frame; the walking mechanism 4 comprises a walking wheel 4-1 arranged at the bottom of the door-shaped frame 3-1, a base, a transmission mechanism arranged on the base and a walking motor 4-2, and the walking wheel 4-1 falls on rails on two sides of the top of the pouring pedestal of the box girder.

As shown in fig. 2, in this embodiment, the steel form 5 is divided into seven sections, which are a flange plate side section 5-1, an upper flange plate section 5-2, a lower flange plate section 5-3, an internal corner circular arc section 5-4, a web plate section 5-5, an internal corner circular arc section 5-6 and a bottom form section 5-7, and the corresponding surface of the steel form 5 is divided into seven sections of surfaces, i.e., a flange plate side surface, an upper flange plate surface, a lower flange plate surface, an external corner circular arc surface, a web plate surface, an internal corner circular arc surface and a bottom form plate surface. As shown in fig. 1 and 2, first grinding roller mechanisms 2-1 which are oppositely matched with the side surfaces of the flange plates and are used for grinding the side surfaces of the flange plates are symmetrically arranged along the lower edge of the main body truss 1 from the end part of the main body truss 1, the second polishing roller mechanism 2-2 is relatively inosculated with the upper flange plate surface and is used for polishing the upper flange plate surface, the third polishing roller mechanism 2-3 is relatively inosculated with the lower flange plate surface and is used for polishing the lower flange plate surface, the fourth polishing roller mechanism 2-4 is relatively inosculated with the external corner circular arc surface and is used for polishing the external corner circular arc surface, the fifth polishing roller mechanism 2-5 is relatively inosculated with the web plate surface and is used for polishing the web plate surface, the sixth polishing roller mechanism 2-6 is relatively inosculated with the internal corner circular arc surface and is used for polishing the internal corner circular arc surface, and the seventh polishing roller mechanism 2-7 is relatively inosculated with the bottom formwork surface and is used for polishing the bottom formwork surface. The four grinding roller mechanisms of the second grinding roller mechanism 2-2, the third grinding roller mechanism 2-3, the fifth grinding roller mechanism 2-5 and the seventh grinding roller mechanism 2-7 are basically the same in shape, and only have different length sizes.

As shown in fig. 3, taking the third grinding roller mechanism 2-3 as an example, the seven grinding roller mechanisms each include a hanging plate 15 connected to the lower edge of the main truss 1, a rotating shaft 7 mounted on the hanging plate 15, a grinding motor 8, a driver (chain) 9, and a grinding roller 10 sleeved on the rotating shaft 7, and a wire abrasive is attached to the surface of the grinding roller 10. In addition, a jacking screw rod and a compression spring are arranged at the two ends of the hanging plate 15 and the grinding roller 10. Seven kinds of grinding roller mechanisms are respectively arranged on the hanging plate 15 and the grinding roller 10, so that the hanging plate and the grinding roller mechanisms respectively correspond to the seven kinds of grinding roller mechanisms.

As shown in figure 4, the first polishing roller 10-1 of the first polishing roller mechanism 2-1 is vertical and can be attached to the side face of a flange plate in use, the bottom of the first polishing roller 10-1 is designed to be conical, and the conical convex angle 11 can better polish the corner part of the side face of the flange plate of the steel template.

As shown in fig. 1 and 2, the second grinding roller of the second grinding roller mechanism 2-2 has an included angle of 4 degrees with the horizontal plane, and can be attached to the upper flange plate surface of the steel moulding plate when in use.

As shown in fig. 1 and 2, the third grinding roller of the third grinding roller mechanism 2-3 has an included angle of 10 degrees with the horizontal plane, and can be attached to the lower flange plate surface of the steel formwork when in use.

As shown in FIG. 5, the fourth grinding roller 10-4 of the fourth grinding roller mechanism 2-4 is made into a waist drum shape with a concave arc surface and can be attached to the external corner arc surface of the steel template when in use.

As shown in fig. 1 and 2, the fifth grinding roller of the fifth grinding roller mechanism 2-5 has an angle of 76 degrees with the horizontal plane, and can be attached to the web surface of the steel molding plate when in use.

As shown in fig. 6, the sixth grinding roller 10-6 of the sixth grinding roller mechanism 2-6 is made into a cylindrical shape with a convex arc surface, and can be attached to the internal corner arc surface of the steel template when in use.

As shown in fig. 1 and 2, the seventh grinding roller of the seventh grinding roller mechanism 2-7 is horizontal and can be fully attached to the bottom formwork surface of the steel formwork when in use.

The respective grinding rollers of the seven grinding roller mechanisms adjacent to each other are parallel to each other back and forth in the direction of movement of the grinding machine and form a section which is overlapped alternately, and the length of the section which is overlapped alternately is generally 10-30 cm.

The sander of this embodiment also includes a dust removal device, and the dust removal device includes fan 12, pipeline and suction opening. The power control system of this embodiment includes the above-mentioned travel motor 4-2, a plurality of grinding motors 8 and fan 12, etc. that the electric cabinet 6 controls with it.

As shown in fig. 1, the lifting mechanism 3 is that two ends of a cantilever bracket of a main truss 1 are both provided with a lifting support 3-3, sliding grooves are formed on the inner sides of vertical frames at two sides of a door type frame 3-1, and two sides of the lifting support 3-3 are embedded into the sliding grooves; a screw rod is arranged at the top of the lifting bracket 3-3 in a penetrating way; one end of the screw rod is fixed on the top of the portal frame 3-1, the other end of the screw rod is in threaded connection with the thread driver 3-2, and the thread driver 3-2 and the fixed seat thereof are fixed on two vertical inner side walls of the lifting support 3.

As shown in fig. 1 and 2, the transverse chords, the longitudinal chords, the vertical struts and the diagonal braces of the main truss 1 are formed by welding square pipes, and a steel plate and a fan 12 are laid on the top of the main truss 1. The fan 12 connects the seven branch air pipes and the seven groups of air suction openings to the positions near the seven grinding roller mechanisms respectively through the main air pipe. The electric cabinet 6 is electrically connected with the plurality of grinding motors 8, the walking motor 4-2 and the fan 12 through cables, and is externally connected with a power supply.

When the steel formwork polishing machine is used, after the polishing machine is in place, polishing roller motors of seven polishing roller mechanisms are started through the electric cabinet, the running states of the seven polishing roller mechanisms are checked, and the contact degree between the polishing rollers of the polishing roller mechanisms and seven sections of steel formworks is adjusted by adjusting the height of the main truss 1 through the lifting mechanism 3;

after preparation is finished, starting a walking motor through an electric cabinet, enabling a grinding machine to start to move and walk along rails on two sides of the top of a pouring pedestal of a box girder on two sides of a steel template, and thoroughly grinding the whole surface of the steel template by seven grinding rollers in the moving and walking process;

in the polishing process, the polishing roller can always keep the pressure on the surface of the steel template through the compression spring; in addition, the power condition of each grinding roller mechanism is judged according to the current of the grinding roller motor, and the distance between the grinding roller and the surface of the steel formwork is adjusted through the jacking screw rod according to the design power requirement. In addition, in the polishing process, a fan is started to remove dust in real time;

and after polishing, performing other procedures such as subsequent dust removal, mold release agent coating and the like.

The above description is only for the preferred embodiment of the present invention, but the present invention is not limited thereto, for example: 1) the grinding roller mechanism can adopt other structures besides the structure of the embodiment; 2) the lifting mechanism 3 may have other configurations than the above-described embodiment; 3) the structure of the main truss may be other structures than the above-described embodiments and the illustrated structures; 4) the power control system and the motors controlled by the power control system can also be replaced by a hydraulic motor and a hydraulic controller, namely, electric control is replaced by hydraulic control; 5) the chain can also be replaced by a belt or other transmission; and so on. All equivalents and modifications of the inventive concept and its technical solutions are intended to be included within the scope of the present invention.