CN217783004U - Strutting arrangement is used in construction of prefabricated interior shear force wall - Google Patents

Description

A support device for prefabricated internal shear wall construction

technical field

The utility model relates to the technical field of building construction, in particular to a support device for construction of a prefabricated inner shear wall.

Background technique

Supporting devices for prefabricated internal shear wall construction have been widely used in the field of building construction; shear walls are also called wind-resistant walls, earthquake-resistant walls or structural walls. Load and vertical load (gravity) walls to prevent structural shear (shear) damage, also known as seismic walls, generally made of reinforced concrete, prefabricated internal shear walls are made of reinforced concrete in advance outside the main body of the building , the overall building component that is installed inside the main body of the building and plays the role of the shear wall during construction. The existing support devices for the construction of the prefabricated internal shear wall include positioning angle brackets and diagonal support rods. During the construction of the force wall, first set the positioning corner code at the designated position in the main body of the building, hoist the prefabricated inner shear wall and vertically place it in the positioning corner code, and install it using the embedded bolts on the prefabricated wall board and the expansion bolts on the ground For the inclined support rod, use the inspection ruler to detect the verticality of the prefabricated wall and re-measure the elevation of the top of the wall, use the diagonal support rod to adjust the verticality of the wall, loosen the hook, and check the wall again after adjusting the diagonal support rod The horizontal position, elevation, verticality, and the flatness of adjacent walls, but in actual construction, it is found that the existing positioning corner codes and inclined support rods are better for the positioning, horizontal position and verticality of the prefabricated inner shear wall. The ability to adjust, but the ability to adjust the flatness between adjacent walls is poor. When the flatness between adjacent walls is not good, it is necessary to use tools such as inverted chains to fine-tune the walls. Use The chain-winding tool needs to install additional stress points on the ground and walls, and the stress points must be removed after adjustment. The operation is complicated, time-consuming and laborious, resulting in reduced work efficiency.

Utility model content

In order to solve the above technical problems, the utility model provides a prefabricated internal shear wall construction support device that can be easily and quickly adjusted the flatness of adjacent walls without additional tools and stress points, and improves work efficiency.

A support device for prefabricated inner shear wall construction of the present utility model, comprising a slanting support rod, a base plate, a vertical plate, a ratchet reducer, a plug joint and a transmission mechanism, and a vertical plate is vertically installed at the front end of the base plate; it also includes a plurality of Nuts, mounting plates, two cams and wheel shafts, the two ends of the inclined support rods are respectively screwed to the wall and the ground, the bottom plate is placed on the ground, the vertical plate is provided with multiple mounting holes, and the embedded bolts of the wall are inserted into the vertical In the multiple mounting holes of the plate, multiple nuts are screwed to multiple embedded bolts to fasten the vertical plate on the wall, the rear end of the upper end surface of the bottom plate is installed with a mounting plate, and the ratchet reducer is installed on the side of the mounting plate On the wall, there is a ratchet assembly inside the ratchet reducer, the input shaft of the ratchet reducer is concentrically installed with a plug joint, and the two cams are respectively symmetrically installed at the left and right ends of the wheel shaft, and a part of the cam surface is set as a protruding wheel surface , the protruding wheel surface protrudes from the lower end surface of the base plate and is in frictional contact with the ground, the other part of the round wheel surface of the cam is higher than the lower end surface of the base plate and does not contact the ground, and the rear end of the base plate is equipped with two mounting seats through bolts , the wheel shaft is rotated and installed in the two mounting seats, and the output shaft of the ratchet reducer and the wheel shaft are connected through a transmission mechanism; Screwed on the wall, the lower end of the bottom plate is in contact with the ground, and the plug joint is moved back and forth with tools such as iron rods, the plug joint drives the input shaft of the ratchet reducer to rotate back and forth, and the ratchet assembly of the ratchet reducer runs, making the ratchet reducer The output shaft of the ratchet reducer rotates in one direction, and the output shaft of the ratchet reducer drives the wheel shaft and two cams to rotate through the transmission mechanism. The height of the same prefabricated inner shear wall is also raised to a slight height, so that the prefabricated inner shear wall is separated from the ground, and the two cams continue to rotate forward, which can drive the bottom plate, vertical plate and prefabricated inner shear wall to Slightly move forward or backward to realize the fine adjustment of the position of the prefabricated internal shear wall, and then adjust the flatness between adjacent prefabricated internal shear walls. After the flatness adjustment is completed, if the cam faces of the two cams touch the ground, loosen the axle The prefabricated inner shear wall can be placed on the ground without any other tools, and there is no need to install and remove additional stress points, and the operation is simple. Since the prefabricated inner shear wall is separated from the ground, the frictional resistance is small. Therefore, the adjustment speed is fast and the time is short, which improves work efficiency.

Preferably, it also includes an adjustment knob, the ratchet reducer is provided with an adjustment knob, and the adjustment knob is connected to the ratchet assembly inside the ratchet reducer; by turning the adjustment knob, the rotation direction of the output shaft of the ratchet reducer is changed, so that the bottom plate and the vertical Installing the plate on one side of the wall can fine-tune the prefabricated inner shear wall forward and backward, with higher adjustment accuracy, simplify construction steps, shorten time-consuming, and improve work efficiency.

Preferably, the transmission mechanism includes a driving sprocket, a chain and a driven sprocket, the driving sprocket is concentrically installed on the output shaft of the ratchet reducer, the driven sprocket is concentrically installed on the wheel shaft, and the chain is respectively sleeved and linked on the driving sprocket and the driven sprocket. On the driven sprocket; the output shaft of the ratchet reducer drives the driving sprocket to rotate, the driving sprocket drives the driven sprocket to rotate through the chain, and the driven sprocket drives the wheel shaft to rotate, so that the two cams drive the bottom plate and the vertical plate to move forward and backward. The structure is mature and simple, and the transmission efficiency is high.

Preferably, it also includes two bearings, the two bearings are respectively installed in the two mounting seats of the bottom plate, and the left and right ends of the wheel shaft are connected concentrically with the inner rings of the two bearings respectively; by installing the two bearings, the smooth rotation of the wheel shaft can be improved Sex, reduce the friction of the axle and improve the service life.

Preferably, it also includes a plurality of gear teeth, and the protruding wheel surfaces of the two cams are provided with a plurality of gear teeth, and the plurality of gear teeth are hardened; by arranging a plurality of gear teeth, the protruding wheel surfaces of the two cams are improved. The friction between the ground and the hardened teeth reduces the wear rate and improves the service life.

Preferably, the oblique support rod includes a lead screw, a socket, a base plate and a push wall plate, the lead screw is provided with an intermediate sleeve and two threaded rods, and the two threaded rods are provided with external threads with opposite directions of rotation, and the inner wall of the intermediate sleeve The two ends are respectively provided with internal threads with opposite directions of rotation, and the two screw rods are respectively connected to the middle sleeve by rotation. The middle sleeve of the lead screw is provided with a socket, and the upper end surface of the foot plate is connected to the lower threaded rod of the lead screw by rotation. , the push wall board is rotationally connected with the upper end threaded rod of the lead screw, and both the push wall board and the foot plate are provided with multiple bolt holes; the expansion bolts on the ground are passed through the bolt holes of the foot plate, and the prefabricated inner shear wall The pre-embedded bolts pass through the bolt holes of the push wall plate, use multiple nuts to fasten the base plate and the push wall plate to the ground and the wall, use tools such as iron rods to insert into the socket, turn the middle sleeve of the screw, The two threaded rods are extended or shortened along the two ends of the middle casing, the base plate is fixed, and the push wall plate pushes the prefabricated internal shear wall to swing, thereby adjusting the verticality of the prefabricated internal shear wall and adjusting the prefabricated internal shear wall. Shear wall for support, good practicability.

Compared with the prior art, the utility model has the beneficial effects that: when it is necessary to adjust the flatness between adjacent walls, the vertical plate is screwed to the wall through a plurality of nuts, and the lower end surface of the bottom plate is in contact with the ground. Tools such as iron bars pull the plug joint back and forth, the plug joint drives the input shaft of the ratchet reducer to rotate back and forth, and the ratchet assembly of the ratchet reducer runs, making the output shaft of the ratchet reducer rotate in one direction, and the output shaft of the ratchet reducer passes through the transmission The mechanism drives the wheel shaft and two cams to rotate. When the cams of the two cams are in contact with the ground, the two cams lift the bottom plate and the vertical plate to a small height through the wheel shaft, and the same prefabricated inner shear wall is also lifted by a small amount. height, so that the prefabricated inner shear wall is separated from the ground, and the two cams continue to rotate forward, which can drive the bottom plate, vertical plate and prefabricated inner shear wall to move forward or backward slightly, and realize the fine adjustment of the position of the prefabricated inner shear wall , and then adjust the flatness between the adjacent prefabricated inner shear walls. After the flatness adjustment is completed, if the cam faces of the two cams touch the ground, loosen the bolts of the mounting seats of the axles, and place the prefabricated inner shear walls on the ground , no other tools are needed, and no additional stress points need to be installed and removed, and the operation is simple. Since the prefabricated inner shear wall is separated from the ground, the frictional resistance is small, so the adjustment speed is fast and the time is short, improving work efficiency.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a side view structural representation of the utility model;

Fig. 3 is a schematic diagram of the axonometric structure of the utility model;

Fig. 4 is the enlarged structure schematic diagram of base plate and riser and parts thereof;

Fig. 5 is a structural schematic view of the transmission mechanism, ratchet reducer, cam and wheel shaft;

Marks in the accompanying drawings: 1, inclined support rod; 2, bottom plate; 3, vertical plate; 4, nut; 5, mounting plate; 6, ratchet reducer; 7, plug joint; 8, cam; 9, axle; 10, Adjusting knob; 11, driving sprocket; 12, chain; 13, driven sprocket; 14, bearing; 15, gear teeth; 16, leading screw; 17, jack; 18, base plate;

Detailed ways

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

Example 1

A support device for prefabricated internal shear wall construction, comprising an oblique support rod 1, a bottom plate 2, a vertical plate 3, a ratchet reducer 6, a plug joint 7 and a transmission mechanism, and a vertical plate 3 is installed vertically on the front end of the bottom plate 2; It includes a plurality of nuts 4, a mounting plate 5, two cams 8 and a wheel shaft 9. The two ends of the inclined support rod 1 are respectively connected to the wall and the ground by rotation and screw connection. The bottom plate 2 is placed on the ground, and the vertical plate 3 is provided with multiple installation Holes, the embedded bolts of the wall are inserted into multiple installation holes of the vertical plate 3, and multiple nuts 4 are screwed on the multiple embedded bolts to fasten the vertical plate 3 on the wall, and the rear end of the upper end surface of the bottom plate 2 A mounting plate 5 is installed, and the ratchet reducer 6 is installed on the side wall of the mounting plate 5. The inside of the ratchet reducer 6 is provided with a ratchet assembly. Symmetrically installed on the left and right ends of the wheel shaft 9, a part of the wheel surface of the cam 8 is set as a protruding wheel surface. The wheel surface is higher than the lower end surface of the base plate 2 and does not contact the ground. The rear end of the base plate 2 is equipped with two mounting seats through bolts, and the wheel shaft 9 is rotatably installed in the two mounting seats. The wheel shafts 9 are connected by a transmission mechanism; when the flatness between adjacent walls needs to be adjusted, the vertical plate 3 is screwed to the wall through a plurality of nuts 4, and the lower end surface of the bottom plate 2 is in contact with the ground, and iron is used to A tool such as a stick pulls the plug joint 7 back and forth, and the plug joint 7 drives the input shaft of the ratchet reducer 6 to rotate back and forth, and the ratchet assembly of the ratchet reducer 6 runs, so that the output shaft of the ratchet reducer 6 rotates in one direction, and the ratchet reducer 6 rotates in one direction. The output shaft drives the wheel shaft 9 and the two cams 8 to rotate through the transmission mechanism. When the cams of the two cams 8 are in contact with the ground, the two cams 8 lift the bottom plate 2 and the vertical plate 3 to a slight height through the wheel shaft 9. The prefabricated inner shear wall is also lifted to a slight height, so that the prefabricated inner shear wall is separated from the ground, and the two cams 8 continue to rotate forward, which can drive the bottom plate 2, the vertical plate 3 and the prefabricated inner shear wall forward Or slightly move backward to realize the fine adjustment of the position of the prefabricated inner shear wall, and then adjust the flatness between adjacent prefabricated inner shear walls. After the flatness adjustment is completed, if the cam surfaces of the two cams 8 touch the ground, loosen the axle 9 bolts of the mounting seat, put the prefabricated inner shear wall on the ground, no other tools are needed, and no additional stress points need to be installed and removed, and the operation is simple, because the prefabricated inner shear wall is separated from the ground, the frictional resistance is small , so the adjustment speed is fast and the time is short, improving work efficiency.

Example 2

A support device for prefabricated internal shear wall construction, comprising an oblique support rod 1, a bottom plate 2, a vertical plate 3, a ratchet reducer 6, a plug joint 7 and a transmission mechanism, and a vertical plate 3 is installed vertically on the front end of the bottom plate 2; It includes a plurality of nuts 4, a mounting plate 5, two cams 8 and a wheel shaft 9. The two ends of the inclined support rod 1 are respectively connected to the wall and the ground by rotation and screw connection. The bottom plate 2 is placed on the ground, and the vertical plate 3 is provided with multiple installation Holes, the embedded bolts of the wall are inserted into multiple installation holes of the vertical plate 3, and multiple nuts 4 are screwed on the multiple embedded bolts to fasten the vertical plate 3 on the wall, and the rear end of the upper end surface of the bottom plate 2 A mounting plate 5 is installed, and the ratchet reducer 6 is installed on the side wall of the mounting plate 5. The inside of the ratchet reducer 6 is provided with a ratchet assembly. Symmetrically installed on the left and right ends of the wheel shaft 9, a part of the wheel surface of the cam 8 is set as a protruding wheel surface. The wheel surface is higher than the lower end surface of the base plate 2 and does not contact the ground. The rear end of the base plate 2 is equipped with two mounting seats through bolts, and the wheel shaft 9 is rotatably installed in the two mounting seats. The axles 9 are connected through a transmission mechanism; an adjustment knob 10 is also included, and the ratchet reducer 6 is provided with an adjustment knob 10, and the adjustment knob 10 is connected with the ratchet assembly inside the ratchet reducer 6; the transmission mechanism includes a driving sprocket 11, The chain 12 and the driven sprocket 13, the driving sprocket 11 is concentrically installed on the output shaft of the ratchet reducer 6, the driven sprocket 13 is concentrically installed on the wheel shaft 9, and the chain 12 is respectively set and linked on the driving sprocket 11 and the driven sprocket. On the sprocket 13; also include two bearings 14, the two bearings 14 are respectively installed in the two mounts of the base plate 2, and the left and right ends of the wheel shaft 9 are concentrically connected with the inner rings of the two bearings 14 respectively; Gear teeth 15, the protruding wheel surfaces of the two cams 8 are provided with a plurality of gear teeth 15, and the plurality of gear teeth 15 are hardened; by installing two bearings 14, the smoothness of the rotation of the wheel shaft 9 is improved, and the friction of the wheel shaft 9 is reduced. friction, turn the adjustment knob 10 according to the connection of the adjacent wall, change the rotation direction of the output shaft of the ratchet reducer 6, and rotate the plug joint 7 back and forth, so that the output shaft of the ratchet reducer 6 drives the driving sprocket 11 to rotate, and the driving sprocket 11 Drive the driven sprocket 13 to rotate through the chain 12, the driven sprocket 13 drives the wheel shaft 9 to rotate, and the wheel shaft 9 drives the two cams 8 to rotate. When the protruding wheel surfaces of the two cams 8 contact the ground, multiple gear teeth 15 grips the ground with high friction, and the hardened multiple gear teeth 15 reduce the wear speed and increase the service life.

Example 3

A support device for prefabricated internal shear wall construction, comprising an oblique support rod 1, a bottom plate 2, a vertical plate 3, a ratchet reducer 6, a plug joint 7 and a transmission mechanism, and a vertical plate 3 is installed vertically on the front end of the bottom plate 2; It includes a plurality of nuts 4, a mounting plate 5, two cams 8 and a wheel shaft 9. The two ends of the inclined support rod 1 are respectively connected to the wall and the ground by rotation and screw connection. The bottom plate 2 is placed on the ground, and the vertical plate 3 is provided with multiple installation Holes, the embedded bolts of the wall are inserted into multiple installation holes of the vertical plate 3, and multiple nuts 4 are screwed on the multiple embedded bolts to fasten the vertical plate 3 on the wall, and the rear end of the upper end surface of the bottom plate 2 A mounting plate 5 is installed, and the ratchet reducer 6 is installed on the side wall of the mounting plate 5. The inside of the ratchet reducer 6 is provided with a ratchet assembly. Symmetrically installed on the left and right ends of the wheel shaft 9, a part of the wheel surface of the cam 8 is set as a protruding wheel surface. The wheel surface is higher than the lower end surface of the base plate 2 and does not contact the ground. The rear end of the base plate 2 is equipped with two mounting seats through bolts, and the wheel shaft 9 is rotatably installed in the two mounting seats. The axles 9 are connected by a transmission mechanism; the oblique support rod 1 includes a lead screw 16, a socket 17, a base plate 18 and a push wall plate 19, and the lead screw 16 is provided with an intermediate casing and two threaded rods, and the two threaded rods External threads with opposite rotation direction are provided, and internal threads with opposite rotation directions are respectively provided at both ends of the inner wall of the intermediate sleeve, and the two screw rods are respectively screwed with the intermediate sleeve, and the intermediate sleeve of the lead screw 16 is provided with a socket 17 , the upper end surface of the base plate 18 is rotatably connected with the lower end threaded rod of the leading screw 16, and the push wall plate 19 is rotatably connected with the upper end threaded rod of the lead screw 16, and the push wall plate 19 and the base plate 18 are all provided with a plurality of bolt holes; The expansion bolts on the ground pass through the bolt holes of the base plate 18, and the embedded bolts on the prefabricated inner shear wall pass through the bolt holes of the push wall plate 19, and a plurality of nuts 4 are used to tighten the base plate 18 and the push wall plate 19. Fixed on the ground and the wall, use tools such as iron rods to insert into the socket 17, turn the middle casing of the lead screw 16, so that the two threaded rods are extended or shortened along the two ends of the middle casing, and the foot plate 18 is Fixed, the push wall panel 19 pushes the prefabricated inner shear wall to swing, and then adjusts the verticality of the prefabricated inner shear wall, and supports the prefabricated inner shear wall, which belongs to the mature prior art.

As shown in Figures 1 to 5, a support device for prefabricated internal shear wall construction of the present utility model, when it is working, firstly connects the vertical plate 3 to the wall body through a plurality of nuts 4, and the bottom plate 2 The lower end surface is in contact with the ground, turn the adjustment knob 10 to adjust the output direction of the ratchet reducer 6, and then use tools such as iron rods to pull the plug connector 7 back and forth, and the plug connector 7 drives the input shaft of the ratchet reducer 6 to rotate back and forth, and the ratchet reducer The ratchet assembly of 6 runs, so that the output shaft of the ratchet reducer 6 rotates in one direction, and the output shaft of the ratchet reducer 6 drives the wheel shaft 9 and the two cams 8 to rotate through the transmission mechanism, and then when the cams of the two cams 8 contact the ground At the same time, the two cams 8 lift the bottom plate 2 and the vertical plate 3 to a slight height through the wheel shaft 9, and the same prefabricated inner shear wall is also lifted to a slight height, so that the prefabricated inner shear wall is separated from the ground, and the two When the cam 8 continues to rotate forward, it can drive the bottom plate 2, the vertical plate 3 and the prefabricated inner shear wall to move slightly, so as to realize the fine adjustment of the position of the prefabricated inner shear wall, and then adjust the flatness between adjacent prefabricated inner shear walls After the flatness adjustment is completed, if the cam faces of the two cams 8 land on the ground at last, loosen the bolts of the mounting seats of the axle 9, and put the prefabricated inner shear wall on the ground.

The main functions realized by the utility model are: the operation is simple and fast to adjust the flatness of the adjacent wall surface, without additional tools and stress points, and the work efficiency is improved.

A support device for prefabricated inner shear wall construction of the utility model, its installation method, connection method or setting method are all common mechanical methods, as long as it can achieve its beneficial effect, it can be implemented; a prefabricated structure of the utility model The oblique support rod 1, bottom plate 2, vertical plate 3, nut 4, ratchet reducer 6, driving sprocket 11, chain 12, driven sprocket 13, and lead screw 16 of the support device for internal shear wall construction are purchased from the market , technical personnel in the industry only need to install and operate according to the accompanying instruction manual, without creative work by technical personnel in the field.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the present invention. The terms used herein in the description of the utility model are only for the purpose of describing specific embodiments, and are not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And modification should also be regarded as the protection scope of the present utility model.

Claims (6)

1. A supporting device for construction of a prefabricated inner shear wall comprises an inclined supporting rod (1), a bottom plate (2), a vertical plate (3), a ratchet reducer (6), a plug connector (7) and a transmission mechanism, wherein the vertical plate (3) is vertically installed at the front end of the bottom plate (2); the vertical plate type ratchet wheel speed reducer is characterized by further comprising a plurality of nuts (4), a mounting plate (5), two cams (8) and a wheel shaft (9), wherein two ends of an inclined supporting rod (1) are rotatably screwed with a wall body and the ground respectively, the bottom plate (2) is placed on the ground, a plurality of mounting holes are formed in the vertical plate (3), embedded bolts of the wall body are inserted into the mounting holes of the vertical plate (3), the plurality of nuts (4) are screwed on the plurality of embedded bolts to fasten the vertical plate (3) on the wall body, the mounting plate (5) is installed at the rear end of the upper end face of the bottom plate (2), the ratchet wheel speed reducer (6) is installed on the side wall of the mounting plate (5), a ratchet wheel assembly is arranged inside the ratchet wheel speed reducer (6), a plug-in head (7) is concentrically installed on an input shaft of the ratchet wheel speed reducer (6), the two cams (8) are symmetrically installed at the left end and the right end of the wheel shaft (9) respectively, one part of the cam (8) is set to be a convex wheel face, the convex wheel face extends out of the lower end face of the bottom plate (2) and is in frictional contact with the ground, the other part of the circular wheel (8) which is higher than the lower end face of the bottom plate (2), an output shaft (9) and is installed in a transmission mechanism, and an output shaft seat of the mounting mechanism, and an output shaft (9) are installed in the transmission mechanism, and an output shaft seat of the transmission mechanism are installed in the transmission mechanism.

2. The supporting device for the construction of the prefabricated inner shear wall as claimed in claim 1, further comprising an adjusting knob (10), wherein the ratchet reducer (6) is provided with the adjusting knob (10), and the adjusting knob (10) is in transmission connection with a ratchet assembly inside the ratchet reducer (6).

3. The precast inner shear wall construction supporting device according to claim 1, wherein the transmission mechanism comprises a driving sprocket (11), a chain (12) and a driven sprocket (13), the driving sprocket (11) is concentrically installed on the output shaft of the ratchet reducer (6), the driven sprocket (13) is concentrically installed on the wheel shaft (9), and the chain (12) is respectively sleeved and connected on the driving sprocket (11) and the driven sprocket (13).

4. The precast inner shear wall construction supporting device as defined in claim 1, further comprising two bearings (14), wherein the two bearings (14) are respectively installed in two installation seats of the bottom plate (2), and the left and right ends of the wheel shaft (9) are respectively concentrically connected with the inner rings of the two bearings (14).

5. The precast inner shear wall construction supporting device as recited in claim 1, further comprising a plurality of gear teeth (15), wherein a plurality of gear teeth (15) are provided on the convex wheel surfaces of the two cams (8), and the plurality of gear teeth (15) are hardened.

6. The supporting device for the construction of the prefabricated inner shear wall as claimed in claim 1, wherein the inclined supporting rod (1) comprises a screw rod (16), a jack (17), a bottom plate (18) and a pushing wall plate (19), the screw rod (16) is provided with a middle sleeve and two threaded rods, the two threaded rods are provided with external threads with opposite rotation directions, two internal threads with opposite rotation directions are respectively arranged at two ends of the inner wall of the middle sleeve, the two threaded rods are respectively in rotary threaded connection with the middle sleeve, the jack (17) is arranged on the middle sleeve of the screw rod (16), the upper end surface of the bottom plate (18) is in rotary connection with the lower end threaded rod of the screw rod (16), the pushing wall plate (19) is in rotary connection with the upper end threaded rod of the screw rod (16), and the pushing wall plate (19) and the bottom plate (18) are both provided with a plurality of bolt holes.

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