Core-pulling core pipe of hollow shear wall

Abstract

The core-pulling core pipe of the hollow shear wall comprises a core body, side face expansion and contraction plates and corner expansion and contraction plates, the side wall of the core body is hinged to the side face expansion and contraction plates through arranged first hinge rods, and the side wall of the core body is hinged to the corner expansion and contraction plates through arranged second hinge rods; the core body is internally provided with a driving assembly for driving the side surface collapsible plates and the corner collapsible plates to move, when the driving assembly drives the side surface collapsible plates to be far away from the core body, the corner collapsible plates are far away from the core body and abut against the two adjacent side surface collapsible plates, and when the driving assembly drives the side surface collapsible plates to be close to the core body, the corner collapsible plates are far away from the core body and abut against the two adjacent side surface collapsible plates. The corner expansion and contraction plate firstly gets close to the core body. According to the core pulling device, by arranging the side face expansion and contraction plate and the corner expansion and contraction plate, when core pulling is conducted after the prefabricated shear wall is formed, under driving of the driving assembly, the corner expansion and contraction plate retracts firstly, then the side face expansion and contraction plate retracts close to the core body, and therefore the appearance of a core pipe is reduced, and direct core pulling can be conveniently conducted.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated component production, in particular to a core-pulling tube of a hollow shear wall. Background Art

[0002] Prefabricated buildings refer to buildings that transfer a large amount of on-site work in traditional construction methods to factories, where building components and accessories are processed and manufactured, transported to the construction site, and assembled and installed on site through reliable connection methods. Among them, hollow shear walls are a common building component, and are currently also widely prefabricated to form prefabricated building components for use.

[0003] Patent document CN219158056U disclosed a prefabricated assembled hollow shear wall on the announcement date of June 9, 2023, including a wall body, in which a plurality of vertical cavities are arranged side by side; a thin-walled core body, which is arranged in contact with the inner wall of the cavity; a steel bar skeleton, which includes a first structural steel bar, a second structural steel bar and a connecting steel bar arranged within the thickness range of the wall body, wherein the first structural steel bar and the second structural steel bar form two steel meshes and are arranged on opposite sides of each thin-walled core body, and the two ends of the connecting steel bar are respectively connected to the two steel meshes. Its beneficial effect is that by setting a thin-walled core body and setting it on the inner side of the steel bar skeleton, when the wall body is prefabricated and poured, the thin-walled core body can isolate a cavity inside the concrete, and after the concrete solidifies, a hollow shear wall can be formed, and the thin-walled core body fits the inner wall of the cavity without removal, realizing the core-pulling-free function, saving the manufacturing process and increasing the manufacturing efficiency.

[0004] In the existing production process of hollow shear walls, there is a process that requires core extraction. When the concrete is poured and initially solidified, the core is extracted. The existing core tube for core extraction is processed by profiles, which is difficult to extract. The core extraction needs to be performed by a winch or a crane. Therefore, a hollow shear wall core tube is urgently needed to solve the above problem. Summary of the invention

[0005] The purpose of the present invention is to provide a core-pulling core tube for a hollow shear wall to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A core-pulling core tube of a hollow shear wall comprises a core body, side expansion and contraction plates and corner expansion and contraction plates, wherein the side walls of the core body are hinged to the side expansion and contraction plates via a first hinge rod, and are also hinged to the corner expansion and contraction plates via a second hinge rod, wherein a driving assembly for driving the side expansion and contraction plates and the corner expansion and contraction plates to move is arranged in the core body, and when the driving assembly drives the side expansion and contraction plates to move away from the core body, the corner expansion and contraction plates move away from the core body later and abut between two adjacent side expansion and contraction plates, and when the driving assembly drives the side expansion and contraction plates to move towards the core body, the corner expansion and contraction plates move towards the core body first.

[0008] Preferably, a first connecting member is fixedly provided on the side wall of the core body, a second connecting member is fixedly provided on the inner side of the side expansion and contraction plate, and two ends of the first hinged rod are hinged to the first connecting member and the second connecting member respectively.

[0009] Preferably, a third connecting member is fixedly provided on the side wall of the core body, a fourth connecting member is fixedly provided on the inner side of the corner expansion and contraction plate, and both ends of the second hinged rod are hinged to the third connecting member and the fourth connecting member respectively.

[0010] Preferably, the driving assembly includes a first driving rod and a second driving rod, one end of which is lifted and lowered in the core body, the other end of the first driving rod movably passes through the side wall of the core body and is fixedly connected to the corner expansion and contraction plate, and the other end of the second driving rod movably passes through the side wall of the core body and is fixedly connected to the side expansion and contraction plate.

[0011] Preferably, a floating block is provided in the core for lifting and lowering, the end of the first driving rod provided in the core is fixedly connected to a sliding block, the side wall of the floating block is provided with a first sliding groove matching the sliding block, the end of the second driving rod provided in the core is in the lower part of the lifting and lowering stroke of the floating block, and an elastic component is provided in the core for maintaining elasticity and pushing the second driving rod upward.

[0012] Preferably, the elastic component includes a sliding sleeve movably connected to the end of the second driving rod arranged in the core, the lower end of the sliding sleeve is fixedly connected to a guide column, the inner wall of the core is fixedly connected to a guide sleeve movably connected to the guide column, and a first elastic member is arranged between the sliding sleeve and the guide sleeve.

[0013] Preferably, a buffer assembly is provided in the floating block, and the buffer assembly is used to offset the relative rise and fall of the floating block and the first driving rod when the first driving rod descends to the limit position and the floating block continues to descend.

[0014] Preferably, the buffer assembly comprises a second slide groove connected to the upper side of the inner end of the first slide groove, and the inner top surface of the second slide groove is connected to a top block movably arranged in the second slide groove through a second elastic member.

[0015] Preferably, a screw is rotatably connected in the core, the upper end of the screw is threadably connected to the floating block, and the lower end of the screw rotatably penetrates the core and is coaxially provided with a torsion piece.

[0016] Preferably, convex plates are evenly arranged on the outer sides of the side expansion and contraction plates.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] The core tube of the hollow shear wall is provided with side expansion and contraction plates and corner expansion and contraction plates. Driven by the driving component, the side expansion and contraction plates first expand and stretch in the direction away from the core body, and then the corner expansion and contraction plates expand and stretch to counteract between two adjacent side expansion and contraction plates, thereby forming a core tube with a stable shape for use. When the core is pulled out after the prefabricated shear wall is formed, the corner expansion and contraction plates are first retracted under the drive of the driving component, and the side expansion and contraction plates are then retracted close to the core body, thereby reducing the shape of the core tube, making it convenient and direct to pull out the core, thereby improving the practicality of the device.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a front cross-sectional structure provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a top cross-sectional structure provided by an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the cross-section structure at AA in the middle;

[0026] Figure 5 The embodiment of the present invention provides Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 6 A schematic diagram of the internal structure provided by an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Core; 2. Side expansion and contraction plates; 3. Corner expansion and contraction plates; 4. First hinged rod; 5. Second hinged rod; 6. First connecting piece; 7. Second connecting piece; 8. Third connecting piece; 9. Fourth connecting piece; 10. First driving rod; 11. Second driving rod; 12. Floating block; 13. Sliding block; 14. First slide groove; 15. Sliding sleeve; 16. Guide column; 17. Guide sleeve; 18. First elastic piece; 19. Second slide groove; 20. Second elastic piece; 21. Top block; 22. Screw rod; 23. Torque piece; 24. Convex plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0031] See also Figure 1-6 A core-pulling core tube of a hollow shear wall provided in an embodiment of the present invention comprises a core body 1, side expansion and contraction plates 2 and corner expansion and contraction plates 3. The side wall of the core body 1 is hinged to the side expansion and contraction plates 2 through a first hinge rod 4, and is also hinged to the corner expansion and contraction plates 3 through a second hinge rod 5. A driving component for driving the side expansion and contraction plates 2 and the corner expansion and contraction plates 3 to move is provided in the core body 1. When the driving component drives the side expansion and contraction plates 2 to move away from the core body 1, the corner expansion and contraction plates 3 move away from the core body 1 later and abut between two adjacent side expansion and contraction plates 2. When the driving component drives the side expansion and contraction plates 2 to approach the core body 1, the corner expansion and contraction plates 3 move closer to the core body 1 first.

[0032] Specifically, the core 1 is in the shape of a hollow tube, and its outer shape is preferably an octagonal prism; there are preferably four side expansion and contraction plates 2, which are arranged in a rectangle on the four sides of the core 1, and there are preferably four corner expansion and contraction plates 3, which are arranged at the four corners of the rectangle surrounded by the side expansion and contraction plates 2; driven by the driving component, the side expansion and contraction plates 2 move closer or farther away in parallel to the side of the core 1, and the corner expansion and contraction plates 3 move closer or farther away from the core 1 along the diagonal direction of the rectangle surrounded by the above side expansion and contraction plates 2; the edges of the side expansion and contraction plates 2 are chamfered, and the chamfered surfaces are parallel to the diagonal of the above rectangle, and also match the sides of the corner expansion and contraction plates 3, thereby achieving the abutment between two adjacent side expansion and contraction plates 2 to maintain the expansion and contraction state of the side expansion and contraction plates 2; the side expansion and contraction plates 2 and the corner expansion and contraction plates 3 can be fully matched after expansion and contraction, and a sealing strip is provided at the matching position, which is used to prevent the penetration of concrete during concrete pouring, thereby increasing the service life of the core tube. Under the traditional production method, the density of concrete can only be detected after the prefabricated components are finalized. When the density does not meet the requirements, the wall panel cannot be used, resulting in waste. Too high density will also cause cost waste. For this reason, a density detection device is fixed on the side expansion and contraction plate 2, which detects the density of concrete through real-time monitoring. In actual use of this technical solution, under the drive of the driving component, the side expansion and contraction plate 2 first expands and stretches away from the core body 1, and the corner expansion and contraction plate 3 then expands and stretches to offset between two adjacent side expansion and contraction plates 2, thereby forming a core tube with a stable shape for use. When the core is pulled out after the prefabricated shear wall is formed, the corner expansion and contraction plate 3 is retracted first under the drive of the driving component, and the side expansion and contraction plate 2 is retracted close to the core body 1, thereby reducing the shape of the core tube, which can be conveniently and directly pulled out.

[0033] Compared with the prior art, the core tube of a hollow shear wall core pulling proposed in an embodiment of the present invention is provided with side expansion and contraction plates 2 and corner expansion and contraction plates 3. Driven by a driving component, the side expansion and contraction plates 2 first expand and stretch in a direction away from the core body 1, and then the corner expansion and contraction plates 3 expand and stretch to counteract each other between two adjacent side expansion and contraction plates 2, thereby forming a core tube with a stable shape for use. When the core is pulled out after the prefabricated shear wall is formed, the corner expansion and contraction plates 3 are first retracted under the drive of the driving component, and then the side expansion and contraction plates 2 are retracted close to the core body 1, thereby reducing the shape of the core tube, making it convenient and direct to pull out the core, thereby improving the practicability of the device.

[0034] As the preferred technical solution of this embodiment, a first connecting member 6 is fixedly provided on the side wall of the core body 1, a second connecting member 7 is fixedly provided on the inner side of the side expansion and contraction plate 2, and both ends of the first hinged rod 4 are hinged to the first connecting member 6 and the second connecting member 7 respectively. Specifically, when the side expansion and contraction plate 2 is away from the core body 1, the first hinged rod 4 and the first connecting member 6 and the second connecting member 7 are in an "I" shape; when the side expansion and contraction plate 2 is close to the core body 1, the first hinged rod 4 and the first connecting member 6 and the second connecting member 7 are in a "Z" shape, thereby satisfying the movement of the side expansion and contraction plate 2.

[0035] As the preferred technical solution of this embodiment, a third connecting member 8 is fixedly provided on the side wall of the core body 1, a fourth connecting member 9 is fixedly provided on the inner side of the corner expansion and contraction plate 3, and both ends of the second hinged rod 5 are hinged to the third connecting member 8 and the fourth connecting member 9 respectively. Specifically, when the corner expansion and contraction plate 3 is away from the core body 1, the second hinged rod 5 and the third connecting member 8 and the fourth connecting member 9 are in a "I" shape; when the corner expansion and contraction plate 3 is close to the core body 1, the second hinged rod 5 and the third connecting member 8 and the fourth connecting member 9 are in a "Z" shape, thereby satisfying the movement of the corner expansion and contraction plate 3.

[0036] As a preferred technical solution of this embodiment, the driving assembly includes a first driving rod 10 and a second driving rod 11, one end of which is lifted and lowered in the core body 1. The other end of the first driving rod 10 can move through the side wall of the core body 1 and is fixedly connected to the corner expansion and contraction plate 3. The other end of the second driving rod 11 can move through the side wall of the core body 1 and is fixedly connected to the side expansion and contraction plate 2. Specifically, the first driving rod 10 moves with the corner expansion and contraction plate 3. When the corner expansion and contraction plate 3 expands and contracts outward, the first driving rod 10 extends outward from the core body 1 and moves upward. When the corner expansion and contraction plate 3 retracts inward, the first driving rod 10 shortens inward from the core body 1 and moves downward. The second driving rod 11 moves with the side expansion and contraction plate 2. When the side expansion and contraction plate 2 expands and contracts outward, the second driving rod 11 extends outward from the core body 1 and moves upward. When the side expansion and contraction plate 2 retracts inward, the second driving rod 11 shortens inward from the core body 1 and moves downward.

[0037] As a preferred technical solution of this embodiment, a floating block 12 is provided in the core body 1 for lifting and lowering, a first driving rod 10 is provided in the core body 1 at the end thereof fixedly connected with a sliding block 13, a first sliding groove 14 matching with the sliding block 13 is provided on the side wall of the floating block 12, an end of the second driving rod 11 provided in the core body 1 is in the lower part of the lifting and lowering stroke of the floating block 12, an elastic component for maintaining elasticity and pushing the second driving rod 11 upward is provided in the core body 1, specifically, the shape of the floating block 12 matches the inside of the core body 1 so as to only perform lifting and lowering movements; the sliding block 13 moves radially along the floating block 12, and the extension and retraction of the first driving rod 10 on the core body 1 drives the sliding block 13 to move radially. The block 13 moves in the first slide groove 14; the second drive rod 11 is pushed upward by the elastic component to make the side expansion and contraction plate 2 automatically maintain an outward expansion and contraction state, and when the floating block 12 descends in the lower part of the lifting stroke, the floating block 12 can press the second drive rod 11 downward to make the second drive rod 11 resist the downward movement of the elastic component, and then make the side expansion and contraction plate 2 retract toward the core body 1, and the floating block 12 has already driven the corner expansion and contraction plate 3 to retract through the first drive rod 10 when it descends before; on the contrary, when the floating block 12 rises again, the second drive rod 11 resumes its rise under the elastic recovery action of the elastic component, so that the side expansion and contraction plate 2 resumes its expansion and contraction state.

[0038] As a further preferred technical solution of this embodiment, the elastic component includes a second driving rod 11 arranged on the end portion of the core body 1, on which a sliding sleeve 15 is movably sleeved, a guide column 16 is fixedly connected to the lower end of the sliding sleeve 15, a guide column 16 is fixedly connected to the inner wall of the core body 1, and a guide column 17 movably sleeved with the guide column 16 is fixedly connected, and a first elastic member 18 is arranged between the sliding sleeve 15 and the guide sleeve 17. Specifically, the arrangement of the guide column 16 and the guide sleeve 17 limits the sliding sleeve 15 to perform lifting and lowering movements in the core body 1; the second driving rod 11 moves relative to the sliding sleeve 15 along the length direction, and moves relative to the core body 1 together with the sliding sleeve 15; the first elastic member 18 can preferably be a spring, which is sleeved on the outside of the guide column 16 to prevent the sliding sleeve 15 from descending close to the guide sleeve 17, that is, to keep the sliding sleeve 15 in the highest position, so that the second driving rod 11 is in the highest position to maintain the expansion and contraction state of the side expansion and contraction plate 2.

[0039] As a further preferred technical solution of this embodiment, a buffer assembly is arranged in the floating block 12, and the buffer assembly is used to offset the relative rise and fall of the floating block 12 and the first driving rod 10 when the first driving rod 10 descends to the limit position and the floating block 12 continues to descend. Specifically, the space between the core body 1 and the side expansion and contraction plate 2 or the corner expansion and contraction plate 3 is usually narrow; the setting of the buffer assembly can make the floating block 12 continue to descend after it descends to a certain height, and after the first driving rod 10 links the corner expansion and contraction plate 3 to a sufficient distance close to the core body 1, so that the corner expansion and contraction plate 3 is no longer driven, and only the side expansion and contraction plate 2 is linked to retract by the second driving rod 11.

[0040] As a further preferred technical solution of this embodiment, the buffer assembly includes a second slide groove 19 connected to the upper side of the inner end of the first slide groove 14, and the inner top surface of the second slide groove 19 is connected to a top block 21 movably arranged in the second slide groove 19 through a second elastic member 20. Specifically, the second elastic member 20 may preferably be a spring, and the second elastic member 20 keeps the top block 21 pushed in the lowermost position. At this time, the bottom surface of the top block 21 is flush with the inner top surface of the first slide groove 14. Preferably, the lower end corners of the top block 21 may be chamfered or rounded to facilitate the movement of the slider 13 in the first slide groove 14 to the corresponding second slide groove 19; the slider 13 is lifted and lowered in the second slide groove 19, and accordingly, a through groove matching the first drive rod 10 is provided on the upper side of the first slide groove 14. In actual use of the present technical solution, the floating block 12 descends from the highest position. At this time, the slider 13 is at the end of the first slide groove 14 away from the second slide groove 19, so that the first drive rod 10 descends together with the floating block 12, and the corner expansion and contraction plate 3 is retracted toward the core body 1 under the hinge function, thereby also making the slider 13 move in the first slide groove 14 close to the second slide groove 19. When the corner expansion and contraction plate 3 is retracted to a sufficient distance and can no longer be retracted, the slider 13 corresponds to the lower end of the second slide groove 19, and the floating block 12 continues to descend. Then, the slider 13 moves toward the upper end of the second slide groove 19 to push the top block 21 and squeeze the second elastic member 20. At the same time, the floating block 12 also begins to press the second drive rod 11 downward to make The side expansion and contraction plate 2 retracts, and the first elastic member 18 is compressed, and the retraction of the side expansion and contraction plate 2 is finally completed; thereafter, when the floating block 12 rises, the elastic potential energy of the first elastic member 18 is released, so that the second drive rod 11 rises with the floating block 12, and the side expansion and contraction plate 2 first expands and contracts away from the core body 1, and at the same time, the elastic potential energy of the second elastic member 20 is released, so that the slider 13 is relatively lowered in the second slide groove 19 until it corresponds to the first slide groove 14, and then, the floating block 12 continues to rise, which drives the first drive rod 10 to rise together, so that the corner expansion and contraction plate 3 is linked to expand and contract in the direction away from the core body 1, that is, it expands and contracts later than the side expansion and contraction plate 2, and finally, the corner expansion and contraction plate 3 can abut between two adjacent side expansion and contraction plates 2.

[0041] As a preferred technical solution of this embodiment, a screw rod 22 is rotatably connected inside the core body 1, the upper end of the screw rod 22 is threadedly connected to the floating block 12, and the lower end of the screw rod 22 is rotatably connected to the core body 1 and is coaxially provided with a torque member 23. Specifically, the screw rod 22 drives the floating block 12 to rise and fall through the thread feeding action; the torque member 23 can be operated by external tools such as wrenches to drive the screw 22 to rotate.

[0042] As a preferred technical solution of this embodiment, convex plates 24 are evenly arranged on the outer sides of the side expansion and contraction plates 2. Specifically, the convex plates 24 are used to increase the internal roughness of the wallboard.

[0043] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A core-pulling core tube for a hollow shear wall, characterized in that: The invention comprises a core body (1), a side expansion and contraction plate (2) and a corner expansion and contraction plate (3); the side wall of the core body (1) is hinged to the side expansion and contraction plate (2) via a first hinge rod (4), and is also hinged to the corner expansion and contraction plate (3) via a second hinge rod (5); a driving component for driving the side expansion and contraction plate (2) and the corner expansion and contraction plate (3) to move is arranged in the core body (1); when the driving component drives the side expansion and contraction plate (2) to move away from the core body (1), the corner expansion and contraction plate (3) moves away from the core body (1) later and abuts between two adjacent side expansion and contraction plates (2); and when the driving component drives the side expansion and contraction plate (2) to move closer to the core body (1), the corner expansion and contraction plate (3) moves closer to the core body (1) first.

2. The core-pulling core tube of the hollow shear wall according to claim 1, characterized in that: A first connecting member (6) is fixedly provided on the side wall of the core body (1), a second connecting member (7) is fixedly provided on the inner side of the side expansion and contraction plate (2), and two ends of the first hinged rod (4) are respectively hinged to the first connecting member (6) and the second connecting member (7).

3. The core-pulling core tube of the hollow shear wall according to claim 1, characterized in that: A third connecting member (8) is fixedly provided on the side wall of the core body (1), a fourth connecting member (9) is fixedly provided on the inner side of the corner expansion and contraction plate (3), and two ends of the second hinged rod (5) are respectively hinged to the third connecting member (8) and the fourth connecting member (9).

4. The core-pulling core tube of the hollow shear wall according to claim 1, characterized in that: The driving assembly comprises a first driving rod (10) and a second driving rod (11) with one end being lifted and lowered in the core body (1); the other end of the first driving rod (10) movably penetrates the side wall of the core body (1) and is fixedly connected to the corner expansion and contraction plate (3); the other end of the second driving rod (11) movably penetrates the side wall of the core body (1) and is fixedly connected to the side expansion and contraction plate (2).

5. The core-pulling core tube of the hollow shear wall according to claim 4, characterized in that: A floating block (12) is provided in the core body (1) for lifting and lowering; the end of the first driving rod (10) provided in the core body (1) is fixedly connected to a sliding block (13); the side wall of the floating block (12) is provided with a first sliding groove (14) matching the sliding block (13); the end of the second driving rod (11) provided in the core body (1) is located in the lower part of the lifting and lowering stroke of the floating block (12); and an elastic component is provided in the core body (1) for maintaining elasticity and pushing the second driving rod (11) upward.

6. The core-pulling core tube of the hollow shear wall according to claim 5, characterized in that: The elastic component comprises a second driving rod (11) arranged on the end of the core body (1) and movably sleeved, a sliding sleeve (15), a guide column (16) being fixedly connected to the lower end of the sliding sleeve (15), a guide sleeve (17) movably sleeved with the guide column (16) being fixedly connected to the inner wall of the core body (1), and a first elastic member (18) being arranged between the sliding sleeve (15) and the guide sleeve (17).

7. The core-pulling core tube of the hollow shear wall according to claim 5, characterized in that: A buffer assembly is arranged in the floating block (12), and the buffer assembly is used to offset the relative rise and fall of the floating block (12) and the first driving rod (10) when the first driving rod (10) descends to the limit position and the floating block (12) continues to descend.

8. The core-pulling core tube of the hollow shear wall according to claim 7, characterized in that: The buffer assembly comprises a second slide groove (19) connected to the upper side of the inner end of the first slide groove (14), and the inner top surface of the second slide groove (19) is connected to a top block (21) movably arranged in the second slide groove (19) through a second elastic member (20).

9. The core-pulling core tube of the hollow shear wall according to claim 5, characterized in that: A screw rod (22) is rotatably connected inside the core body (1), the upper end of the screw rod (22) is threadedly connected to the floating block (12), and the lower end of the screw rod (22) rotatably penetrates the core body (1) and is coaxially provided with a torque piece (23).

10. The core-pulling core tube of the hollow shear wall according to claim 1, characterized in that: The outer sides of the side expansion and contraction plates (2) are evenly provided with convex plates (24).

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