Raft outer circle shear wall upper mold plate reinforcing structure and construction method thereof

Abstract

The application relates to a raft outer circle shear wall upturned formwork reinforcing structure and a construction method thereof. The raft outer circle shear wall upturned formwork reinforcing structure comprises a plurality of groups of clamping rods and clamping heads matched with the clamping rods, the clamping rods are in an overall L shape, the vertical rod end of the L-shaped clamping rod is provided with a hook-shaped structure, the clamping head is slidably sleeved on the surface of the horizontal rod of the clamping rod; one end of the clamping head is also provided with a hook-shaped structure, the hook-shaped structures of the clamping head and the clamping rod are oppositely arranged, a cushion plate is arranged between the hook-shaped structure of the clamping rod and the surface of the brick mold, and a wooden square is arranged between the hook-shaped structure of the clamping head and the surface of the brick mold; the raft outer circle shear wall upturned formwork reinforcing structure is reinforced on the brick mold through the mutual cooperation of the clamping rod and the clamping head, is simple to operate, is convenient for on-site operation, the cushion plate is placed between the clamping rod and the brick mold, the wooden square is placed between the clamping head and the brick mold, and the waterproof coiled material can be protected from being damaged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of shear wall upturning formwork reinforcement, and particularly relates to a raft outer ring shear wall upturning formwork reinforcement structure and a construction method thereof. BACKGROUND

[0002] The raft outer ring shear wall upturning formwork needs to be reinforced during construction, and conventional reinforcement methods include diagonal bracing reinforcement using peripheral soil, but in actual use, soil disturbance can easily lead to insecure reinforcement and formwork deformation; conventional reinforcement methods also include reinforcement using steel bars welded to raft steel bars or wood battens, but steel bars need to be cut after pouring, which can cause seepage hazards; conventional reinforcement methods also include directly nailing wood battens to brick membranes with iron nails, which can easily damage upturning waterproof rolls. SUMMARY

[0003] The application aims to provide a raft outer ring shear wall upturning formwork reinforcement structure and a construction method thereof, which are simple in structure and reasonable in design.

[0004] The application achieves the above-mentioned purpose through the following technical solutions.

[0005] The application provides a raft outer ring shear wall upturning formwork reinforcement structure, which includes a plurality of sets of clamping rods and clamping heads matched with the clamping rods, the clamping rods are in the shape of L as a whole, the vertical rod end of the L-shaped clamping rod is provided with a hook-shaped structure, and the clamping head is slidingly sleeved on the surface of the horizontal rod of the clamping rod; one end of the clamping head is also provided with a hook-shaped structure, the hook-shaped structures of the clamping head and the clamping rod are oppositely arranged, a pad is arranged between the hook-shaped structure of the clamping rod and the surface of the brick membrane, and a wood batten is arranged between the hook-shaped structure of the clamping head and the surface of the brick membrane.

[0006] As a further optimization scheme of the application, the application includes a liftable pressing plate and a pushing plate, the pressing plate is arranged above the clamping rod, one end of the pressing plate and the pushing plate is rotationally connected, and the other end of the pushing plate is in contact with the clamping head.

[0007] As a further optimization scheme of the application, the application includes a moving piece, a limiting piece and an elastic rope, the moving piece and the limiting piece are both slidingly installed above the clamping rod, the moving piece and the limiting piece both reciprocate along the length direction of the clamping rod, the friction force between the limiting piece and the clamping rod is greater than the friction force between the moving piece and the clamping rod, the moving piece is connected with the limiting piece through the elastic rope, the limiting piece is in contact with the clamping head, the limiting piece is hingedly connected with the pushing plate, the moving piece is below the pressing plate, and a telescopic structure is arranged between the moving piece and the pressing plate.

[0008] As a further optimization scheme of the present application, the telescopic structure comprises a sleeve, a connecting plate and a second spring, the connecting plate is slidingly inserted into the interior of the sleeve, the connecting plate ascends and descends along the height direction of the sleeve, the connecting plate is fixedly connected with the pressing plate, the sleeve is arranged in the interior of the moving piece, the second spring is movably inserted into the interior of the sleeve, and the second spring is in contact with the connecting plate.

[0009] As a further optimization scheme of the present application, the interior of the moving piece is provided with a cavity, a limiting plate is slidingly inserted into the interior of the cavity, the limiting plate ascends and descends in the interior of the cavity, the limiting plate is fixedly connected with the sleeve, and a first spring is connected between the limiting plate and the moving piece.

[0010] As a further optimization scheme of the present application, a plurality of protrusions are arranged below the limiting plate, the protrusions are in contact with the clamping rod, and the protrusions are made of rubber.

[0011] As a further optimization scheme of the present application, a plurality of rolling balls are arranged between the upper surface of the moving piece and the clamping rod, the rolling balls are movably connected with the moving piece, and the rolling balls are in contact with the clamping rod.

[0012] As a further optimization scheme of the present application, a rotating shaft is rotatably inserted into the interior of the limiting piece, the axial direction of the rotating shaft is parallel to the length direction of the clamping rod, two groups of supporting plates are symmetrically rotatably arranged on the exterior of the rotating shaft, the two groups of supporting plates form an X shape, clamping plates are fixedly arranged below the two groups of supporting plates, the clamping plates are in contact with the clamping rod, a return spring is arranged on the exterior of the rotating shaft, the return spring is in contact with the supporting plates, wedge blocks are fixedly arranged at the upper ends of the two groups of supporting plates, and the wedge blocks are in contact with the pushing plate.

[0013] The present application also provides a raft outer circle shear wall upturned formwork reinforcing structure construction method.

[0014] A pad is arranged on one side of the brick mold, and a wood square is arranged on the other side of the brick mold.

[0015] The hook-shaped structure of the clamping rod and the clamping head is arranged corresponding to the pad and the wood square.

[0016] The clamping head is struck from the side to shorten the distance between the hook-shaped structure of the clamping rod and the clamping head, and the brick mold is tightened.

[0017] The present application also provides another raft outer circle shear wall upturned formwork reinforcing structure construction method.

[0018] A pad is arranged on one side of the brick mold, and a wood square is arranged on the other side of the brick mold.

[0019] The hook-shaped structure of the clamping rod and the clamping head is arranged corresponding to the pad and the wood square.

[0020] The end surface of the clamping rod is arranged on the liftable pressing plate and the inclined pushing plate, one end of the pushing plate is in contact with the side surface of the clamping head, the pressing plate is knocked downward, the pushing plate abuts against the clamping head, the distance between the clamping rod and the hook-shaped structure of the clamping head is shortened, and the brick membrane is tightened.

[0021] The application has the beneficial effects that: the application reinforces the brick membrane through the cooperation of the clamping rod and the clamping head, is simple to operate, is convenient for on-site operation, places the cushion plate between the clamping rod and the brick membrane, places the batten between the clamping head and the brick membrane, can protect the waterproof roll from being damaged, thereby being beneficial to guaranteeing the quality of construction, the reinforcing mode is simple and economical, can reduce the construction procedure, and is beneficial to improving the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the structural installation effect schematic diagram of the application;

[0023] Figure 2 is the overall structure schematic diagram of the application;

[0024] Figure 3 is the partial structure sectional view of the application;

[0025] Figure 4 is the local structure sectional view of the application.

[0026] In the figure: 1, clamping rod; 2, clamping head; 301, cushion plate; 302, batten; 401, pressing plate; 402, pushing plate; 5, moving piece; 501, cavity; 502, first spring; 503, limiting plate; 601, protruding block; 602, ball; 701, sleeve; 702, connecting plate; 703, second spring; 8, limiting piece; 801, rotating shaft; 802, supporting plate; 803, clamping plate; 804, return spring; 805, wedge; 9, elastic rope. DETAILED DESCRIPTION

[0027] It is necessary to point out here that the following specific embodiments are only used to further illustrate the application, and cannot be understood as limiting the protection scope of the application, and the skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content. Example one

[0028] As Figure 1As shown, a raft foundation outer ring shear wall upturned formwork reinforcement structure includes several sets of clamping rods 1 and clamping heads 2 that cooperate with the clamping rods 1. The clamping rods 1 are generally L-shaped, and the vertical ends of the L-shaped clamping rods 1 are provided with hook-shaped structures. The clamping heads 2 are slidably sleeved on the surface of the horizontal rods of the clamping rods 1. One end of the clamping heads 2 is also provided with hook-shaped structures. The hook-shaped structures of the clamping heads 2 and the clamping rods 1 are arranged facing each other. A pad 301 is provided between the hook-shaped structure of the clamping rods 1 and the surface of the brick formwork. A wooden block 302 is provided between the hook-shaped structure of the clamping heads 2 and the surface of the brick formwork.

[0029] In this embodiment, the clamping rod 1 is placed above the brick formwork, the pad 301 is placed on the side of the brick formwork near the raft slab, and the wooden block 302 is placed on the other side of the brick formwork. The hooked end of the clamping rod 1 is hooked onto the pad 301. Then, a small hammer is used to strike the clamping head 2 towards the hook-shaped structure of the clamping rod 1. Because the gap between the hole in the clamping head 2 and the clamping rod 1 is very small, it has a self-locking function. This self-locking function can resist the expansion force generated after the formwork is subjected to force. With continuous striking of the clamping head 2, the clamping head 2 can be locked tightly with the clamping rod 1. It is beneficial to reinforce the existing brick formwork, reduce construction procedures, and improve construction efficiency. The pad 301 and the wooden block 302 can increase the friction between the clamping rod 1 and the clamping head 2 and the brick formwork, and can also reduce the damage caused to the brick formwork by the clamping rod 1 and the clamping head 2. It should be noted that the pad 301 and the wooden block 302 can be small pieces of wood or long strips of wood. To prevent the pad 301 and the wooden block 302 from being poured into the raft slab, they can be removed in advance after the guide wall is poured and stabilized, or raised during the brick formwork construction to facilitate construction operations. Example 2

[0030] In this embodiment, as Figure 2 As shown, a raft foundation outer ring shear wall upturn template reinforcement structure is provided, including a liftable pressure plate 401 and a push plate 402. The pressure plate 401 is set above the clamping rod 1. One end of the pressure plate 401 and the push plate 402 are rotatably connected, and the other end of the push plate 402 is in contact with the clamping head 2.

[0031] In this embodiment, unlike in embodiment 1, the clamping head 2 can be moved by striking from above, without needing to strike it horizontally. When the pressure plate 401 is struck, the pressure plate 401 moves toward the clamping rod 1. At this time, the angle between the pressure plate 401 and the push plate 402 increases, and the pressure plate 401 does not undergo horizontal displacement on the clamping rod 1. Therefore, the push plate 402 can push the clamping head 2 toward the hook-shaped structure of the clamping rod 1, and then drive the push plate 402 to move toward the clamping head 2. Thus, the clamping head 2 can be pushed toward the hook-shaped structure of the clamping rod 1 again by striking, so that the clamping head 2 can be clamped with the clamping rod 1.

[0032] In the embodiment, when the reinforcing structure is used, the surface of the clamping rod 1 can be stepped on by feet, which is the surface of the other side of the push plate 402 relative to the liftable pressing plate 401 of the clamping head 2. Embodiment three

[0033] In the embodiment, as shown in Figure 3 and Figure 4 a raft outer circle shear wall formwork reinforcing structure is provided, which comprises a moving piece 5, a limiting piece 8 and an elastic rope 9. The moving piece 5 and the limiting piece 8 are both slidingly installed above the clamping rod 1, and reciprocally move along the length direction of the clamping rod 1. The friction between the limiting piece 8 and the clamping rod 1 is greater than the friction between the moving piece 5 and the clamping rod 1. The moving piece 5 is connected with the limiting piece 8 through the elastic rope 9. The limiting piece 8 is in contact with the clamping head 2. The limiting piece 8 is hinged with the push plate 402. The moving piece 5 is below the pressing plate 401. A telescopic structure is arranged between the moving piece 5 and the pressing plate 401.

[0034] Specifically, the telescopic structure comprises a sleeve 701, a connecting plate 702 and a second spring 703. The connecting plate 702 is slidingly inserted into the inside of the sleeve 701 and is lifted along the height direction of the sleeve 701. The connecting plate 702 is fixedly connected with the pressing plate 401. The sleeve 701 is arranged in the inside of the moving piece 5. The second spring 703 is movably inserted into the inside of the sleeve 701 and is in contact with the connecting plate 702.

[0035] Specifically, the inside of the moving piece 5 is provided with a cavity 501. A limiting plate 503 is slidingly inserted into the inside of the cavity 501 and is lifted in the inside of the cavity 501. The limiting plate 503 is fixedly connected with the sleeve 701. A first spring 502 is connected between the limiting plate 503 and the moving piece 5.

[0036] Further, a plurality of protrusions 601 are arranged below the limiting plate 503. The protrusions 601 are in contact with the clamping rod 1. The protrusions 601 are made of rubber.

[0037] Further, a plurality of balls 602 are arranged between the upper surface of the moving piece 5 and the clamping rod 1. The balls 602 are movably connected with the moving piece 5 and are in contact with the clamping rod 1.

[0038] Specifically, the inside of the limiting piece 8 is rotatably inserted with a rotating shaft 801, the axial direction of the rotating shaft 801 is parallel to the length direction of the clamping rod 1, the outside of the rotating shaft 801 is rotatably installed with two groups of supporting plates 802, the two groups of supporting plates 802 are in X shape, the lower part of each of the two groups of supporting plates 802 is fixedly installed with a clamping plate 803, the clamping plate 803 is in contact with the clamping rod 1, the outside of the rotating shaft 801 is sleeved with a return spring 804, the return spring 804 is in contact with the supporting plate 802, the upper end of each of the two groups of supporting plates 802 is fixedly installed with a wedge block 805, the wedge block 805 is in contact with the push plate 402.

[0039] In use, the pressing plate 401 moves downwards, it should be noted that the elastic force of the first spring 502 is smaller than that of the second spring 703, so the pressing plate 401 first drives the limiting plate 503 to move downwards to press the first spring 502, the limiting plate 503 moves downwards in the inside of the cavity 501, the limiting plate 503 is in contact with the upper surface of the clamping rod 1, the protrusion 601 arranged below the limiting plate 503 can increase the friction between the limiting plate 503 and the clamping rod 1, so as to fix the moving piece 5 on the clamping rod 1.

[0040] The pressing plate 401 continues to move downwards, the pressing plate 401 drives the connecting plate 702 to move synchronously, the connecting plate 702 presses the second spring 703 to move downwards in the sleeve 701, since the pressing plate 401 is rotatably connected with the push plate 402, when the pressing plate 401 moves downwards, the angle between the pressing plate 401 and the push plate 402 gradually increases, the distance between the other end of the push plate 402 and the pressing plate 401 increases, so the push plate 402 can drive the limiting piece 8 to move in the direction away from the pressing plate 401 on the clamping rod 1, so as to drive the clamping head 2 to move to the hook structure of the clamping rod 1.

[0041] It should be noted that when the pressing plate 401 moves downward, it can drive the push plate 402 to rotate, and the push plate 402 contacts the wedge block 805 when rotating, and the push plate 402 extrudes the wedge block 805 to push the upper ends of the two groups of supporting plates 802 away from each other, since the two groups of supporting plates 802 rotate around the rotating shaft 801, and the two groups of supporting plates 802 are combined into an X shape, therefore, when the two groups of supporting plates 802 move away from each other, the lower ends of the two groups of supporting plates 802 can be driven to move away from each other, thereby driving the two groups of clamping plates 803 to move away from each other, and in the initial state, under the elastic force of the back spring 804, the two groups of clamping plates 803 clamp the clamping rod 1, after the two groups of clamping plates 803 move away from each other, the two groups of clamping plates 803 no longer clamp the clamping rod 1, so that the push plate 402 can push the limiting piece 8 to move, and when the pressing plate 401 no longer moves downward, under the elastic force of the first spring 502 and the second spring 703, the pressing plate 401 can be reset, at the same time, the back spring 804 can drive the two groups of clamping plates 803 to move close to each other, and the two groups of clamping plates 803 clamp the clamping rod 1 again, thereby limiting the clamp head 2, so that the clamp head 2 cannot slide back on the outside of the clamping rod 1.

[0042] The specific embodiment of the present application is that the clamping rod 1 is placed above the brick membrane, the backing plate 301 is placed on one side of the brick membrane close to the raft, and the batten 302 is placed on the other side of the brick membrane, the clamping rod 1 is hooked on the backing plate 301 with the hook-shaped structure, and then the clamp head 2 is knocked in the direction of the hook-shaped structure of the clamping rod 1 with a small hammer, since the gap between the hole of the clamp head 2 and the clamping rod 1 is very small, it has a self-locking function, and this self-locking function can resist the expansion force generated after the formwork is stressed, with the continuous knocking of the clamp head 2, the clamp head 2 can be clamped with the clamping rod 1, which is beneficial to reinforce the existing brick membrane, reduce the construction procedure, and improve the construction efficiency, the backing plate 301 and the batten 302 can increase the friction between the clamping rod 1, the clamp head 2 and the brick membrane, and can reduce the damage of the clamping rod 1 and the clamp head 2 to the brick membrane, it should be noted that the backing plate 301 and the batten 302 can be small pieces of wood or long strips of wood.

[0043] Knocking from above drives the clamp head 2 to move, it is not necessary to knock the clamp head 2 from the horizontal direction, when the pressing plate 401 is knocked, the pressing plate 401 moves in the direction of the clamping rod 1, at this time, the angle between the pressing plate 401 and the push plate 402 increases, and the pressing plate 401 does not horizontally displace on the clamping rod 1, therefore, the push plate 402 can drive the clamp head 2 to move in the direction of the hook-shaped structure of the clamping rod 1, and then drive the push plate 402 to move in the direction of the clamp head 2, thereby driving the clamp head 2 to move in the direction of the hook-shaped structure of the clamping rod 1 again, so that the clamp head 2 can be clamped with the clamping rod 1.

[0044] The pressing plate 401 moves downwards, and it is to be noted that the elastic force of the first spring 502 is smaller than that of the second spring 703, so the pressing plate 401 first drives the limiting plate 503 to move downwards, and the first spring 502 is pressed. The limiting plate 503 moves downwards in the cavity 501, the limiting plate 503 contacts the upper surface of the clamping rod 1, the protrusion 601 arranged below the limiting plate 503 can increase the friction between the limiting plate 503 and the clamping rod 1, so as to fix the moving piece 5 on the clamping rod 1.

[0045] The pressing plate 401 continues to move downwards, and the pressing plate 401 drives the connecting plate 702 to move synchronously, the connecting plate 702 presses the second spring 703 to move downwards in the sleeve 701. Since the pressing plate 401 is rotationally connected with the push plate 402, when the pressing plate 401 moves downwards, the angle between the pressing plate 401 and the push plate 402 gradually increases, and the distance between the other end of the push plate 402 and the pressing plate 401 increases, so that the push plate 402 can push the limiting piece 8 to move in the direction away from the pressing plate 401 on the clamping rod 1, thereby pushing the clamping head 2 to move to the hook structure of the clamping rod 1.

[0046] It is to be noted that when the pressing plate 401 moves downwards, the push plate 402 can be driven to rotate, and the push plate 402 contacts the wedge block 805 when rotating, and the push plate 402 presses the wedge block 805 to push the upper ends of the two groups of support plates 802 away from each other. Since the two groups of support plates 802 are rotationally connected around the rotating shaft 801, and the two groups of support plates 802 are combined into an X shape, when the two groups of support plates 802 move away from each other, the lower ends of the two groups of support plates 802 can be driven to move away from each other, thereby driving the two groups of clamping plates 803 to move away from each other. In the initial state, the two groups of clamping plates 803 clamp the clamping rod 1 under the elastic force of the return spring 804, and after the two groups of clamping plates 803 move away from each other, the two groups of clamping plates 803 no longer clamp the clamping rod 1, so that the push plate 402 can push the limiting piece 8 to move. When the pressing plate 401 no longer moves downwards, the pressing plate 401 can be reset under the elastic force of the first spring 502 and the second spring 703, and at the same time, the return spring 804 can drive the two groups of clamping plates 803 to move close to each other, and the two groups of clamping plates 803 clamp the clamping rod 1 again, thereby limiting the clamping head 2, so that the clamping head 2 cannot slide back on the outside of the clamping rod 1.

[0047] The embodiment provides a raft outer ring shear wall upward formwork reinforcing structure construction method, which comprises the following steps:

[0048] A pad 301 is arranged on one side of the brick mold, and a batten 302 is arranged on the other side of the brick mold;

[0049] The hook structure of the clamping rod 1 and the clamping head 2 is arranged corresponding to the pad 301 and the batten 302;

[0050] Side of the chuck 2, shorten the distance between the hook structure of the card bar 1 and the chuck 2, tighten the brick membrane.

[0051] The embodiment also provides a raft outer ring shear wall upturning formwork reinforcing structure construction method, which comprises the following steps:

[0052] A base plate 301 is placed on one side of the brick membrane, and a wood batten 302 is placed on the other side of the brick membrane;

[0053] The hook structure of the card bar 1 and the chuck 2 is arranged corresponding to the base plate 301 and the wood batten 302;

[0054] The end surface of the card bar 1 is placed on a liftable pressing plate 401 and an inclined pushing plate 402, one end of the pushing plate 402 is in contact with the side of the chuck 2, the pressing plate 401 is knocked downward, the pushing plate 402 is in contact with the chuck 2, the distance between the hook structure of the card bar 1 and the chuck 2 is shortened, and the brick membrane is tightened.

[0055] The above embodiment only expresses several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A raft outer circle shear wall formwork reinforcement structure, characterized by: The application relates to a carding device, which comprises a plurality of carding rods and card heads matched with the carding rods, the carding rods are L-shaped as a whole, the vertical rod end of the L-shaped carding rod is provided with a hook structure, the card head is slidably sleeved on the surface of the horizontal rod of the carding rod, one end of the card head is also provided with a hook structure, the hook structures of the card head and the carding rod are oppositely arranged, a cushion plate is arranged between the hook structure of the carding rod and the surface of the brick mold, and a wooden square is arranged between the hook structure of the card head and the surface of the brick mold. The application relates to a carding device, which comprises a moving piece, a limiting piece and an elastic rope, the moving piece and the limiting piece are slidably arranged above the carding rod, the moving piece and the limiting piece reciprocate along the length direction of the carding rod, the friction force between the limiting piece and the carding rod is greater than the friction force between the moving piece and the carding rod, the moving piece is connected with the limiting piece through the elastic rope, the limiting piece is in contact with the card head, the limiting piece is hingedly connected with a push plate, the moving piece is arranged below a pressing plate, and a telescopic structure is arranged between the moving piece and the pressing plate.

2. The raft outer circle shear wall formwork reinforcing structure according to claim 1, wherein: The application relates to a carding device, which comprises a lifting pressing plate and a push plate, the pressing plate is arranged above the carding rod, one end of the pressing plate and the push plate is rotationally connected, and the other end of the push plate is in contact with the card head.

3. A raft outer circle shear wall formwork reinforcing structure according to claim 2, wherein: The telescopic structure comprises a sleeve, a connecting plate and a second spring, the connecting plate is slidably inserted into the sleeve, the connecting plate ascends and descends along the height direction of the sleeve, the connecting plate is fixedly connected with the pressing plate, the sleeve is arranged in the moving piece, the second spring is movably inserted into the sleeve, and the second spring is in contact with the connecting plate.

4. The raft outer circle shear wall formwork reinforcing structure according to claim 3, wherein: The moving piece is internally provided with a cavity, a limiting plate is slidably inserted into the cavity, the limiting plate ascends and descends in the cavity, the limiting plate is fixedly connected with the sleeve, and a first spring is arranged between the limiting plate and the moving piece.

5. The raft outer circle shear wall formwork reinforcing structure according to claim 3, wherein: A plurality of convex blocks are arranged below the limiting plate, the convex blocks are in contact with the carding rod, and the convex blocks are made of rubber.

6. The raft outer circle shear wall formwork reinforcing structure according to claim 3, wherein: A plurality of rolling balls are arranged between the upper surfaces of the moving piece and the carding rod, the rolling balls are movably connected with the moving piece, and the rolling balls are in contact with the carding rod.

7. The raft outer circle shear wall formwork reinforcing structure according to claim 3, wherein: A rotating shaft is rotatably inserted into the limiting piece, the rotating shaft is parallel to the length direction of the carding rod, two groups of supporting plates are rotationally arranged on the outer portion of the rotating shaft in a symmetrical mode, the two groups of supporting plates are X-shaped, clamping plates are fixedly arranged below the two groups of supporting plates, the clamping plates are in contact with the carding rod, a return spring is sleeved on the outer portion of the rotating shaft, the return spring is in contact with the supporting plates, wedge blocks are fixedly arranged at the upper ends of the two groups of supporting plates, and the wedge blocks are in contact with the push plate.

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