CN217536520U - Concrete railway channel beam support convenient to dismantle - Google Patents

Abstract

The utility model provides a concrete railway channel beam support convenient to dismantle belongs to railway channel beam technical field, and it has solved current stability in order to guarantee to support, and the structure is all bigger, at the inconvenient scheduling problem of dismantling and shifting ten minutes. This concrete railway channel type beam support convenient to dismantle, which comprises a base, the upside of base is fixed with a plurality of supporting components, supporting component includes support column and lift post, the lift chamber has been seted up to the inside of support column, the lower extreme in lift chamber is embedded to have first motor, the output shaft end of first motor is fixed with the threaded rod, the lower extreme of lift post stretches into the lift intracavity, the threaded cavity has been seted up to the inside of lift post, the upper end of threaded rod stretch into the threaded cavity and with threaded cavity threaded connection, the annular that is located lift chamber periphery is seted up to the inside of support column consolidates the chamber, the periphery of lift post is fixed with the annular and consolidates a section of thick bamboo. The utility model has the advantages of when guaranteeing to groove type roof beam stabilizing support for the support is convenient for dismantle and shift.

Description

Concrete railway channel beam support convenient to dismantle

Technical Field

The utility model belongs to the technical field of railway channel beam, a support, especially a concrete railway channel beam support convenient to dismantle is related to.

Background

At present, railway track traffic is built in a large area, and construction contradictory nodes with double requirements on rail surface elevation and overpass clearance are often met under site terrain conditions in the actual construction process. Therefore, the channel beam is a beam shape which can solve the contradiction between the two. The channel beam is a beam slab space combined prestressed structure, belonging to a through bridge, and is formed from the portions of traffic lane bed plate, main beam and end cross beam. The channel beam has the characteristics of large size change of the cross section, thin and high web, dense arrangement of reinforcing steel bars and corrugated pipes, complex bidirectional prestress tensioning technology of a beam body and the like.

When the existing construction is carried out, steel dies are usually adopted by the inner side and the outer side of the channel beam as dies, the channel beam needs to be temporarily erected and fixed relative to a construction position through a temporary support, after the prestress tension of the cast-in-place track beam is finished, the temporary support is dismantled, the channel beam falls to a specified position to complete construction, and the existing temporary support is huge in general structure and inconvenient to dismantle and transfer in order to guarantee the stability of support when in use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a concrete railway trough beam support convenient to dismantle, the to-be-solved technical problem of this utility model is: how to realize when guaranteeing to support the channel beam steady for the support is convenient for dismantle and shift.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a concrete railway channel type roof beam support convenient to dismantle, which comprises a base, the upside of base is fixed with a plurality of supporting components, supporting component includes support column and lift post, the lift chamber has been seted up to the inside of support column, the lower extreme in lift chamber is embedded to have first motor, the output shaft end of first motor is fixed with the threaded rod, the lower extreme of lift post stretches into the lift intracavity, the screw thread chamber has been seted up to the inside of lift post, the upper end of threaded rod stretches into the screw thread intracavity and with screw thread chamber threaded connection, the annular that is located lift chamber periphery is seted up to the inside of support column is consolidated, the periphery of lift post is fixed with annular and consolidates a section of thick bamboo, the lower extreme that the annular was consolidated a section of thick bamboo stretches into annular and consolidates the intracavity, the upper end in annular is provided with the inlet pipe, the lower extreme in annular is consolidated the chamber and is provided with row material pipe, the upper end of lift post is fixed with the mounting panel, install the template mount pad on the mounting panel, both ends are fixed with the supporting seat about the upside of base, the upper end of supporting seat is fixed with the lift cylinder, the backup pad.

The utility model discloses a theory of operation is: when the sand reinforcing device is used, the template mounting seat is mounted on the mounting plate, then the threaded rod is driven to rotate through the first motor, the lifting column is driven to ascend under the matching of the threaded rod and the threaded cavity, the lifting column is driven to drive the template mounting seat to ascend to a specified position, then the material pipe adds sand into the annular reinforcing cavity, the annular reinforcing cylinder is supported through the sand, the pressure borne by the threaded rod is reduced, the stability of the device support is improved, the threaded rod is protected, the filling amount of the sand can be adjusted according to the required height, different use requirements are met, when the sand reinforcing device is required to be dismounted, the sand is discharged through the discharging pipe, the first motor is driven to rotate reversely, the lifting column is driven to descend through the threaded rod, the groove beam slowly falls, the template supporting seat is in contact with the supporting plate after the groove beam falls to a certain height, the groove beam is supported through the lifting cylinder, the supporting plate is small in stress and not high in height, a worker can conveniently dismount the bracket, the groove beam is lowered through the lifting cylinder, the lifting cylinder continues to descend, the supporting plate is separated from the groove beam, and the fixing position of the device can be removed.

All be provided with seal assembly on inlet pipe and the row's of arranging the material pipe, seal assembly includes sealed lid, and the equal interval distribution in periphery that inlet pipe and row expect the pipe has a plurality of locating pieces, and the opening part of sealed lid is provided with a plurality of dogs, is formed with the space that supplies the locating piece to pass through between the adjacent dog.

Structure more than adopting, when using, can cover sealed lid in the outer end of inlet pipe and row material pipe for the locating piece passes through the inside that sealed lid was entered into in the clearance between the dog, then rotatory sealed lid, makes the dog rotate the outside to the locating piece, utilizes the cooperation of dog and locating piece to fix a position sealed lid, and the installation is dismantled conveniently, and has guaranteed the intensity that sealed lid is connected.

All seted up the locating hole on sealed lid, dog and the locating piece, sealed lid, dog and locating piece are connected through the cooperation of locating hole and locating pin.

Structure more than adopting, after sealed lid installation is accomplished, can utilize the cooperation of locating pin and locating hole, carry on spacingly to locating piece and dog, prevent when using, make sealed lid rotate because of other factors, cause locating piece and dog to break away from for sealed lid breaks away from row material pipe or inlet pipe, guarantees the security of shutoff.

The equipment chamber has been seted up to the inside of base, and the inside upper end in equipment chamber is fixed with a plurality of first flexible subassemblies, and the lower extreme of first flexible subassembly is fixed with the lift seat, is provided with the base between the lift seat, and the downside of base is provided with a plurality of removal wheels.

Structure more than adopting, when the device removes, can utilize first flexible subassembly to drive the base and descend to make the removal wheel stretch out the base, make the device can utilize the removal wheel to shift, when unmovable, can utilize the base to support the device so that the removal wheel receives into the equipment intracavity, not only can protect the removal wheel, can improve the stability when the device supports moreover.

The upside of base is provided with a plurality of reference columns, and both ends are rotated with the lift seat through the pivot about the base and are connected, and the one end of keeping away from the base of pivot is located the one side that the base was kept away from to the lift seat, and the one end that the base was kept away from in the pivot is fixed with the drive seat, and the left and right sides in equipment chamber is fixed with the flexible subassembly of second, is fixed with the second motor on the flexible subassembly of second, and the output of second motor is fixed with the drive block.

Structure more than adopting, after removing the supporting location, can be so that remove the wheel and receive into the equipment intracavity, and make the drive seat aim at with the drive block, then the flexible subassembly of drive second drives the second motor and removes, make the drive block on the second motor insert in the drive seat, open the second motor, make the second motor rotatory 180 degrees, overturn the base, make the reference column exchange with the position that removes the wheel, then drive the drive block through the flexible subassembly of second and shift out the drive seat, open first flexible subassembly again, make the reference column insert ground, thereby further improvement the stability of device.

A plurality of sliding cavities are formed in the left side and the right side of the base, springs are fixed inside the sliding cavities, the other ends of the springs are fixedly connected with limiting columns, driving sleeves are fixed to the middle portions of the peripheries of the limiting columns, the other ends of the limiting columns are in sliding fit with limiting holes in the lifting seat, L-shaped rods are fixed to the lower ends of the driving sleeves, guide wheels are arranged at the other ends of the L-shaped rods, and guide seats matched with the guide wheels are arranged on the left side and the right side of the equipment cavity.

Structure more than adopting, can utilize spacing post to carry on spacingly to the horizontal position of base when the device removes and supports, prevent to produce and rock, when the base rises, the leading wheel removes along the guide holder, under the effect of guide holder, the leading wheel drives spacing post through L type pole and drive sleeve and keeps away from the seat that goes up and down, thereby remove the spacing to the base, make the base can rotate, realize operating condition's switching, after the switching is accomplished, the base descends, under the effect of spring, spacing post gets into spacing downthehole spacing base again and carries on spacingly.

Compared with the prior art, this concrete railway channel beam support convenient to dismantle has following advantage:

1. when the lifting cylinder is used, the template mounting seat is mounted on the mounting plate, the threaded rod is driven to rotate through the first motor, the lifting column is driven to ascend under the matching of the threaded rod and the threaded cavity, the lifting column drives the template mounting seat to ascend to a specified position, then the feeding pipe adds sand into the annular reinforcing cavity, the annular reinforcing cylinder is supported through the sand, the pressure on the threaded rod is reduced, the stability of the device support is improved, the threaded rod is protected, the filling amount of the sand can be adjusted according to the required height, different use requirements are met, when the lifting cylinder is required to be dismounted, the sand is discharged through the discharging pipe, the first motor is driven to rotate reversely, the lifting column is driven to descend through the threaded rod, the groove beam slowly fall is achieved, the template supporting seat is in contact with the supporting plate after the supporting seat falls to a certain height, the groove beam is supported through the lifting cylinder, the supporting plate is small in stress and not high in height, a worker can conveniently dismount the support, the groove beam descends through the lifting cylinder, the groove beam can be separated from the fixed position, and the device can be removed.

2. The sealing assembly is arranged, the mounting and the dismounting are convenient, and the matching of the positioning block, the stop block and the bolt is utilized, so that the connection strength and the connection stability of the sealing cover are improved.

3. The arrangement of the movable wheels and the positioning columns not only facilitates the movement of the device, but also improves the stability of the device when the device is used.

4. The setting of spacing post, leading wheel and guide holder when guaranteeing that the position of removing wheel and reference column can be exchanged, can guarantee the level of base to guarantee the stability that the base supported.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the middle support assembly of the present invention.

Fig. 3 is a schematic structural diagram of the middle sealing assembly of the present invention.

Fig. 4 is a schematic view of the internal structure of the base of the present invention.

Fig. 5 is a schematic view of the connection structure of the middle base and the lifting seat of the present invention.

In the figure, 1, a base; 2. a support assembly; 3. a reinforcement column; 4. mounting a plate; 5. a template mounting seat; 6. a supporting seat; 7. a lifting cylinder; 8. a support plate; 9. a support pillar; 10. a lifting column; 11. a lifting cavity; 12. a first motor; 13. a threaded rod; 14. a threaded cavity; 15. an annular reinforcement cylinder; 16. an annular reinforcement cavity; 17. a feed pipe; 18. a discharge pipe; 19. positioning blocks; 20. a sealing cover; 21. a stopper; 22. positioning pins; 23. a first telescoping assembly; 24. a lifting seat; 25. a second telescoping assembly; 26. a second motor; 27. a drive block; 28. a driving seat; 29. a base; 30. a moving wheel; 31. a positioning column; 32. a drive sleeve; 33. an L-shaped rod; 34. a guide wheel; 35. a guide seat; 36. a rotating shaft; 37. a limiting column; 38. a limiting hole; 39. a slide chamber; 40. a spring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-5, this concrete railway channel beam support convenient to dismantle, including base 1, the upside of base 1 is fixed with a plurality of supporting components 2, supporting components 2 include support column 9 and lift post 10, adjacent support column 9 direct fixation has a plurality of reinforcement post 3, lift chamber 11 has been seted up to the inside of support column 9, lift chamber 11's lower extreme is embedded to have first motor 12, the output shaft end of first motor 12 is fixed with threaded rod 13, the lower extreme of lift post 10 stretches into lift chamber 11, threaded chamber 14 has been seted up to the inside of lift post 10, the upper end of threaded rod 13 stretches into threaded chamber 14 and is connected with threaded chamber 14 screw thread, the inside of support column 9 is seted up and is located the annular reinforcement chamber 16 of lift chamber 11 periphery, the periphery of lift post 10 is fixed with annular reinforcement section of thick bamboo 15, the lower extreme of annular reinforcement section of thick bamboo 15 stretches into annular reinforcement chamber 16, the upper end of annular reinforcement chamber 16 is provided with inlet pipe 17, the lower extreme of annular reinforcement chamber 16 is provided with row's material pipe 18, the upper end of lift post 10 is fixed with mounting panel 4, install template mount 5 on the mounting panel 4, the upside of base 1 is fixed with the upper end of both ends of support base 6, there is fixed with lift cylinder 7, there is fixed with the upper end of lift cylinder 7.

When the formwork mounting seat 5 is used, the formwork mounting seat 5 is mounted on the mounting plate 4, the threaded rod 13 is driven to rotate through the first motor 12, the lifting column 10 is driven to ascend under the matching of the threaded rod 13 and the threaded cavity 14, the lifting column 10 drives the formwork mounting seat 5 to ascend to a specified position, then the feeding pipe 17 adds sand into the annular reinforcing cavity 16, the annular reinforcing cylinder 15 is supported through the sand, the pressure on the threaded rod 13 is reduced, the stability of device supporting is improved, the threaded rod 13 is protected, the filling amount of the sand can be adjusted according to the required height, different use requirements are met, when the formwork is required to be dismounted, the sand is discharged through the discharging pipe 18, the first motor 12 is driven to rotate reversely, the lifting column 10 is driven to descend through the threaded rod 13, the groove-shaped beam slowly fall is achieved, after the formwork falls to a certain height, the formwork supporting seat 6 is in contact with the supporting plate 8, the lifting cylinder 7 is used for supporting the groove-shaped beam, the supporting plate 8 is small in stress and not high in height, workers can dismount the supporting the formwork from the groove-shaped beam conveniently, then the lifting cylinder 7 is lowered to a fixed position, and the lifting cylinder 7 can be removed continuously.

All be provided with seal assembly on inlet pipe 17 and the row material pipe 18, seal assembly includes sealed lid 20, and the equal interval distribution in periphery of inlet pipe 17 and row material pipe 18 has a plurality of locating pieces 19, and the opening part of sealed lid 20 is provided with a plurality of dogs 21, is formed with the space that supplies locating piece 19 to pass through between the adjacent dog 21.

Structure more than adopting, when using, can cover sealed lid 20 in the outer end of inlet pipe 17 with row material pipe 18 for locating piece 19 enters into the inside of sealed lid 20 through the clearance between dog 21, then rotatory sealed lid 20, makes dog 21 rotatory to the outside of locating piece 19, utilizes dog 21 and locating piece 19's cooperation to fix a position sealed lid 20, and the installation is dismantled conveniently, and has guaranteed the intensity that sealed lid 20 connects.

The sealing cover 20, the stop block 21 and the positioning block 19 are all provided with positioning holes, and the sealing cover 20, the stop block 21 and the positioning block 19 are connected through the matching of the positioning holes and the positioning pins 22.

Structure more than adopting, after sealed lid 20 installation is accomplished, can utilize the cooperation of locating pin 22 and locating hole, carry on spacingly to locating piece 19 and dog 21, prevent when using, make sealed lid 20 rotate because of other factors, cause locating piece 19 and dog 21 to break away from for sealed lid 20 breaks away from row material pipe 18 or inlet pipe 17, guarantees the security of shutoff.

The equipment chamber has been seted up to the inside in base 1, and the inside upper end in equipment chamber is fixed with a plurality of first flexible subassemblies 23, and the lower extreme of first flexible subassembly 23 is fixed with lift seat 24, is provided with base 29 between the lift seat 24, and the downside of base 29 is provided with a plurality of removal wheels 30.

By adopting the structure, when the device moves, the first telescopic assembly 23 can be utilized to drive the base 29 to descend, so that the moving wheel 30 extends out of the base 1, the device can be transferred by utilizing the moving wheel 30, when the device does not move, the moving wheel 30 can be retracted into the equipment cavity, the device is supported by utilizing the base 1, the moving wheel 30 can be protected, and the stability of the device during supporting can be improved.

The upside of base 29 is provided with a plurality of reference columns 31, and both ends are rotated with lift seat 24 through pivot 36 about base 29 and are connected, and the one end of keeping away from base 29 of pivot 36 is located lift seat 24 and keeps away from one side of base 29, and the one end that base 29 was kept away from to pivot 36 is fixed with drive seat 28, and the left and right sides in equipment chamber is fixed with the flexible subassembly 25 of second, is fixed with second motor 26 on the flexible subassembly 25 of second, and the output of second motor 26 is fixed with drive block 27.

By adopting the structure, after the movable wheel 30 is moved to the supporting position, the movable wheel 30 can be retracted into the equipment cavity, the driving seat 28 is aligned to the driving block 27, then the second telescopic assembly 25 is driven to drive the second motor 26 to move, the driving block 27 on the second motor 26 is inserted into the driving seat 28, the second motor 26 is started, the second motor 26 rotates 180 degrees, the base 29 is turned over, the position of the positioning column 31 and the movable wheel 30 is exchanged, then the driving block 27 is driven to move out of the driving seat 28 through the second telescopic assembly 25, the first telescopic assembly 23 is started again, the positioning column 31 is inserted into the ground, and the stability of the device is further improved.

A plurality of sliding cavities 39 are formed in the left side and the right side of the base 29, springs 40 are fixed inside the sliding cavities 39, limiting columns 37 are fixedly connected to the other ends of the springs 40, driving sleeves 32 are fixed in the middle of the peripheries of the limiting columns 37, the other ends of the limiting columns 37 are in sliding fit with limiting holes 38 in the lifting seat 24, L-shaped rods 33 are fixed to the lower ends of the driving sleeves 32, guide wheels 34 are arranged at the other ends of the L-shaped rods 33, and guide seats 35 matched with the guide wheels 34 are arranged on the left upper side and the right upper side of the equipment cavity.

Structure more than adopting, can utilize spacing post 37 to carry on spacingly to the horizontal position of base 29 when the device removes and supports, prevent to produce and rock, when base 29 rose, leading wheel 34 removed along guide holder 35, under the effect of guide holder 35, leading wheel 34 drove spacing post 37 through L type pole 33 and drive sleeve 32 and keeps away from lift seat 24, thereby relieve the spacing to base 29, make base 29 can rotate, realize operating condition's switching, after the switching is accomplished, base 29 descends, under the effect of spring 40, spacing post 37 gets into spacing downthehole 38 again and carries on spacingly to base 29.

The utility model discloses a theory of operation: when in use, the first telescopic assembly 23 drives the base 29 to descend, so that the movable wheel 30 extends out of the base 1, so that the device can be transferred by using the movable wheel 30, after moving to the supporting position, the movable wheel 30 can be retracted into the equipment cavity, and the driving seat 28 is aligned with the driving block 27, then the second telescopic assembly 25 is driven to drive the second motor 26 to move, so that the driving block 27 on the second motor 26 is inserted into the driving seat 28, the second motor 26 is started, so that the second motor 26 rotates 180 degrees, the base 29 is turned over, so that the positioning column 31 is exchanged with the position of the movable wheel 30, then the driving block 27 is driven by the second telescopic assembly 25 to move out of the driving seat 28, then the first telescopic assembly 23 is started, so that the positioning column 31 is inserted into the ground, the template mounting seat 5 is mounted on the mounting plate 4, then the threaded rod 13 is driven to rotate by the first motor 12, under the cooperation of the threaded rod 13 and the threaded cavity 14, the lifting column 10 is driven to ascend, so that the lifting column 10 drives the template mounting seat 5 to ascend to descend to a reinforcing pipe, thereby increasing the height of the reinforcing pipe supporting plate 16, and lowering the reinforcing pipe by using the threaded rod 13, thereby increasing the supporting plate 13, and increasing the supporting pressure of the reinforcing pipe supporting plate 13, and increasing the supporting plate can be supported by using the reinforcing pipe supporting plate 13, and increasing pressure of the reinforcing pipe supporting plate, thereby, the reinforcing pipe supporting plate 8, the reinforcing pipe supporting plate, the reinforcing pipe supporting plate 13, and increasing pressure of the reinforcing pipe supporting plate can be increased by using the reinforcing pipe supporting plate, and increasing pressure of the reinforcing pipe supporting plate 7, the backup pad 8 atress is less and be in height not high this moment, and the staff of being convenient for dismantles the support, then utilizes lift cylinder 7 to make the channel beam descend to fixed position, and lift cylinder 7 continues to descend for backup pad 8 breaks away from the channel beam, can remove the device.

To sum up, through the structure setting of supporting component 2 and base 1, realize guaranteeing when the stable support of cell-type roof beam for the support is convenient for dismantle and the function of shifting.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. The utility model provides a concrete railway channel beam support convenient to dismantle, including base (1), a serial communication port, the upside of base (1) is fixed with a plurality of supporting components (2), supporting component (2) include support column (9) and lift post (10), lift chamber (11) have been seted up to the inside of support column (9), the lower extreme of lift chamber (11) is embedded to have first motor (12), the output shaft end of first motor (12) is fixed with threaded rod (13), the lower extreme of lift post (10) stretches into in lift chamber (11), threaded chamber (14) have been seted up to the inside of lift post (10), the upper end of threaded rod (13) stretches into in threaded chamber (14) and with threaded chamber (14) threaded connection, the inside of support column (9) is seted up and is located the annular reinforcement chamber (16) of lift chamber (11) periphery, the periphery of lift post (10) is fixed with annular reinforcement section of thick bamboo (15), the lower extreme of annular reinforcement section of thick bamboo (15) stretches into in annular reinforcement chamber (16), the upper end of annular reinforcement chamber (16) is provided with the inlet pipe (17), the fixed mounting panel (4) of upper end of the upper mounting panel (4), the fixed mould board (4) of the upper end of the base has left and right sides, there is equipped with the discharge tube (6), a lifting cylinder (7) is fixed at the upper end of the supporting seat (6), and a supporting plate (8) is fixed at the upper end of the lifting cylinder (7).

2. The concrete railway channel beam support convenient to disassemble as claimed in claim 1, wherein the feeding pipe (17) and the discharging pipe (18) are respectively provided with a sealing assembly, each sealing assembly comprises a sealing cover (20), a plurality of positioning blocks (19) are respectively distributed on the peripheries of the feeding pipe (17) and the discharging pipe (18) at intervals, a plurality of stop blocks (21) are arranged at the opening of each sealing cover (20), and a gap for the positioning blocks (19) to pass through is formed between every two adjacent stop blocks (21).

3. The concrete railway channel beam bracket convenient to disassemble as claimed in claim 2, wherein the sealing cover (20), the stop block (21) and the positioning block (19) are all provided with positioning holes, and the sealing cover (20), the stop block (21) and the positioning block (19) are connected with the positioning pin (22) through the matching of the positioning holes.

4. The concrete railway channel beam bracket convenient to disassemble as claimed in claim 1, wherein the base (1) is internally provided with an equipment cavity, a plurality of first telescopic assemblies (23) are fixed at the upper ends of the inside of the equipment cavity, lifting seats (24) are fixed at the lower ends of the first telescopic assemblies (23), a base (29) is arranged between the lifting seats (24), and a plurality of moving wheels (30) are arranged at the lower side of the base (29).

5. The concrete railway channel beam support convenient to disassemble as claimed in claim 4, wherein a plurality of positioning columns (31) are arranged on the upper side of the base (29), the left end and the right end of the base (29) are rotatably connected with the lifting seat (24) through rotating shafts (36), one end, far away from the base (29), of each rotating shaft (36) is located on one side, far away from the base (29), of the lifting seat (24), a driving seat (28) is fixed to one end, far away from the base (29), of each rotating shaft (36), second telescopic assemblies (25) are fixed to the left side and the right side of the equipment cavity, second motors (26) are fixed to the second telescopic assemblies (25), and driving blocks (27) are fixed to the output ends of the second motors (26).

6. The concrete railway channel beam support convenient to disassemble as claimed in claim 5, wherein a plurality of sliding cavities (39) are formed in the left side and the right side of the base (29), springs (40) are fixed inside the sliding cavities (39), limiting columns (37) are fixedly connected to the other ends of the springs (40), driving sleeves (32) are fixed in the middle of the peripheries of the limiting columns (37), the other ends of the limiting columns (37) are in sliding fit with limiting holes (38) in the lifting seat (24), L-shaped rods (33) are fixed at the lower ends of the driving sleeves (32), guide wheels (34) are arranged at the other ends of the L-shaped rods (33), and guide seats (35) matched with the guide wheels (34) are arranged on the left upper side and the right upper side of the equipment cavity.

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