Clamping device for hoisting fabricated concrete prefabricated component

Abstract

The invention relates to the field of prefabricated part hoisting, in particular to a clamping device for hoisting an assembly type concrete prefabricated part, the clamping device comprises two hoisting plates, a driving assembly and a clamping assembly, lifting lugs are arranged on the hoisting plates, and the clamping assembly comprises a clamping seat internally provided with a cavity, a clamping rod installed on the clamping seat and used for abutting against the prefabricated part, and a pneumatic assembly. A straight groove allowing the clamping rods to slide is formed in the side wall of one side of the cavity, the multiple clamping rods are arranged in a rectangular array mode and slidably connected into the straight groove, one end of each clamping rod is located in the cavity, and the other end of each clamping rod is located outside the clamping base. By the adoption of the technical scheme, the prefabricated part to be hoisted is placed between the two hoisting plates, the clamping rods make contact with the prefabricated part, and then the two hoisting plates are driven by the driving assembly to be close to each other till clamping force is exerted on the prefabricated part. And then the pneumatic assembly drives the clamping rod to move outwards until the clamping rod is attached to the outer wall of the prefabricated part, and therefore the hoisting device can be suitable for hoisting concrete members of various shapes.

Description

Technical Field

[0001] The present application relates to the field of prefabricated component hoisting, and in particular to a clamping device for hoisting assembled concrete prefabricated components. Background Art

[0002] Precast concrete components refer to concrete components that are prefabricated in a factory or prefabrication site through standardized and mechanized production methods. Common precast concrete components include precast panels, precast beams, precast columns, precast walls, precast stairs, etc.

[0003] At present, the steps for hoisting concrete components are usually as follows: use appropriate slings or slings to tie the concrete components firmly, and ensure that the contact parts of the slings or slings and the components are properly protected to prevent the components from being damaged during the hoisting process. Then, the slings or slings are connected to the hook of the crane.

[0004] However, concrete components have irregular shapes, such as columns, plates, etc. Therefore, the same lifting device cannot be adapted to concrete components of various shapes. Therefore, how to make the lifting device applicable to the lifting of concrete components of various shapes is a problem that technicians in this field need to solve urgently. Summary of the invention

[0005] In order to adapt to the hoisting of concrete components of various shapes, the present application provides a clamping device for hoisting prefabricated concrete components.

[0006] The present application provides a clamping device for hoisting prefabricated concrete components, which adopts the following technical solution: The camming assembly is configured to move the two ends of the camming member toward each other, the camming member being arranged on the camming plate to move the two ends of the camming member toward each other, and the camming member being arranged on the camming plate to move the two ends of the camming member toward each other.

[0007] By adopting the above technical solution, the prefabricated component to be hoisted is placed between the two hoisting plates so that the clamping rod contacts the prefabricated component, and then the two hoisting plates are driven close together by the driving assembly until there is a clamping force on the prefabricated component. Then the clamping rod is driven outward by the pneumatic assembly so that part of the clamping rod presses against the side wall of the prefabricated component and part of the clamping rod is supported on the outer wall of the prefabricated component, thereby further limiting the position of the prefabricated component so that the prefabricated component is stably clamped and can be stably hoisted. Since the driving assembly can adjust the distance between the two hoisting plates, and the clamping rod can move outward with the pneumatic force until it fits against the outer wall of the prefabricated component, it can adapt to the hoisting of concrete components of various shapes, thereby improving the hoisting efficiency.

[0008] Optionally, at least four clamping seats are provided and distributed at the four corners of the hanging plate.

[0009] By adopting the above technical solution, at least four points of the prefabricated component can be limited and clamped, so that the prefabricated component can be more stably fixed between the two hanging plates.

[0010] Optionally, the two hanging plates are respectively a first hanging plate and a second hanging plate, the clamping seat on the first hanging plate is located on a side of the first hanging plate facing the second hanging plate, and the clamping seat is positioned and slidably connected to the first hanging plate.

[0011] By adopting the above technical solution, the position of the clamping rod can be adjusted according to the specific shape and size of the prefabricated component, so that a sufficient part of the prefabricated component is clamped and supported by the clamping rod, so that the clamping device can adapt to the lifting of concrete components of various shapes.

[0012] Optionally, the first hanging plate includes two first cross bars and two first vertical bars, the two ends of the first cross bars are respectively fixedly connected to a first vertical bar, the two first cross bars and the two first vertical bars form a rectangle, the clamping seat is positioned and slidably connected to the first cross bars, and the first vertical bars are telescopically arranged.

[0013] By adopting the above technical solution, the position of the clamping seat in the X direction can be adjusted by sliding the clamping seat on the first crossbar, and the first vertical rod is extended and retracted, so that the position of the clamping seat can be adjusted on the entire horizontal plane of the hanging plate.

[0014] Optionally, the first hanging plate further includes a first airbag, four ends of the first airbag are respectively connected to four clamping seats of the first hanging plate, and the first airbag covers the installation space surrounded by the four clamping seats.

[0015] By adopting the above technical solution, the first airbag can provide better covering and clamping and limiting for the prefabricated component, thereby reducing damage to the prefabricated component during the lifting process.

[0016] Optionally, the clamping seat of the second hanging plate is located on a side of the second hanging plate away from the first hanging plate, and a through hole for the clamping rod to pass through is formed on the second hanging plate.

[0017] By adopting the above technical solution, the second hanging plate is placed under the first hanging plate during hanging, and the clamping seat is located on the side of the second hanging plate away from the first hanging plate, so that the clamping seat will not interfere with the direct contact between the prefabricated component and the second hanging plate, so that the prefabricated component is better supported.

[0018] Optionally, the second lifting plate includes a mounting plate and four support rods, the four support rods form a rectangle and are fixed to each other in pairs, the mounting plate is provided with four clamping seats, one mounting plate corresponds to one clamping seat, the mounting plate is fixedly connected to the angle formed by two support rods, the clamping seat is installed on the mounting plate, and the support rod is retractable.

[0019] By adopting the above technical solution, by adjusting the length of the bracket rod, the clamping seat can be adjusted in position on the entire horizontal plane of the lifting plate, so that the clamping device can adapt to the lifting of concrete components of various shapes.

[0020] Optionally, the support rod includes a movable rod and a fixed rod, two fixed rods are provided and are respectively threadedly connected to both ends of the movable rod, the threading direction of the movable rod is opposite to that of the two fixed rods, and the second hanging plate also includes a reinforcement member, which is cross-shaped and directly connected to the movable rod.

[0021] By adopting the above technical solution, the prefabricated components are further supported so that the prefabricated components can be hoisted more stably.

[0022] Optionally, the reinforcement comprises a cross-shaped center rod and sliding rods slidably sleeved on four ends of the center rod, one end of the sliding rod is connected to the movable rod, and a second airbag is provided between the sliding rods.

[0023] By adopting the above technical solution, the second airbag can provide better covering and clamping for the prefabricated component, thereby reducing damage to the prefabricated component during the lifting process.

[0024] Optionally, the driving assembly includes an adjusting screw passing through the first hanging plate and the second hanging plate, and a driving motor for driving the adjusting screw to rotate, the driving motor is installed on the second hanging plate, the adjusting screw includes a first screw threadedly connected to the first hanging plate, a first rotating rod rotatably connected to the first screw, a second rotating rod rotatably connected to the first rotating rod, and a second screw rotatably connected to the second rotating rod, the second screw and the first screw are coaxially arranged, and the second screw is connected to the output end of the driving motor, and an adjusting assembly for adjusting the clamping between the first rotating rod and the second rotating rod is provided between the first hanging plate and the second hanging plate.

[0025] By adopting the above technical solution, after the prefabricated component is hoisted to a suitable floor position, the angles of the first rotating rod and the second rotating rod are increased, so that the distance between the two hoisting plates becomes larger, so that the prefabricated component can be taken out more easily.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. It can be adapted to the hoisting of prefabricated concrete components of various shapes, thus improving the hoisting efficiency; 2. The prefabricated components can be supported and clamped more stably, making the lifting more stable; 3. Reduce the damage caused by clamping of prefabricated components; 4. The prefabricated components hoisted to the corresponding floors can be unloaded conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of Example 1.

[0028] Figure 2 It is a structural schematic diagram of the first hanging plate in Example 1.

[0029] Figure 3 It is a structural schematic diagram of the second hanging plate in Example 1.

[0030] Figure 4 It is a structural schematic diagram of Example 3.

[0031] Figure 5 It is a structural schematic diagram of Example 4.

[0032] Figure 6 It is a schematic diagram of the structure of the fixed component in Example 4.

[0033] Figure 7 It is a schematic diagram of the structure of the adjustment component in Example 4.

[0034] Description of the accompanying drawings: 1. first hanging plate; 11. first cross bar; 12. first vertical bar; 121. first movable vertical bar; 122. first fixed vertical bar; 13. first airbag; 2. second hanging plate; 21. mounting plate; 22. bracket rod; 221. movable rod; 222. fixed rod; 23. reinforcement; 231. center rod; 232. sliding rod; 24. second airbag; 3. driving assembly; 31. adjusting screw rod; 311. first screw rod; 312. first rotating rod; 313. second rotating rod; 314. second screw rod; 32. driving motor; 4. clamping assembly; 41. clamping seat; 411. cavity; 412. limiting groove; 42. clamping rod; 421. limiting block; 43. fixing bolt; 5. Lifting ear; 6. Adjustment assembly; 61. First rod; 62. Active rod; 63. Driven rod; 64. Second rod; 65. Rotating sleeve; 651. Second transmission gear; 66. Push rod; 7. Fixing assembly; 71. Fixing seat; 72. Fixing block; 721. Force transmission rod; 7211. Third transmission gear; 73. Force screw rod; 731. First section; 732. Second section; 7321. First transmission gear; 733. Spring jumping bean; 74. Force handle. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 This application is described in further detail.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The embodiment of the present application discloses a clamping device for hoisting assembled prefabricated concrete components.

[0039] Example 1 Please refer to Figure 1 In one embodiment of the present application, a clamping device for hoisting prefabricated concrete components includes a hoisting plate, a driving assembly 3 and a clamping assembly 4. There are two hoisting plates, and the hoisting plates are provided with lifting ears 5. The driving assembly 3 is used to drive the two hoisting plates to move closer to or away from each other. The clamping assembly 4 is arranged on the hoisting plate, and is used for fixed-point clamping and supporting the prefabricated component to be hoisted. The clamping assembly 4 includes a clamping seat 41, a clamping rod 42, and a pneumatic assembly. There are at least four clamping seats 41 and they are distributed at the four corners of the hoisting plate. The clamping rod 42 is slidably connected to the clamping seat 41 along the thickness direction of the hoisting plate. The pneumatic assembly is used to drive the clamping rod 42 to slide relative to the clamping seat 41.

[0040] During hoisting, the prefabricated component to be hoisted is placed between two hoisting plates. At this time, one of the hoisting plates supports the prefabricated component. Then, the two hoisting plates are driven close together by the driving component 3 until the two hoisting plates have a clamping force on the prefabricated component. Then, the clamping rod 42 is driven outward by the pneumatic component, so that part of the clamping rod 42 presses against the side wall of the prefabricated component, and part of the clamping rod 42 is supported on the outer wall of the prefabricated component, thereby further limiting the position of the prefabricated component, so that the prefabricated component is stably clamped and can be hoisted stably. Since the driving component 3 can adjust the distance between the two hoisting plates, and the clamping rod 42 can move outward with the pneumatic force until it fits with the outer wall of the prefabricated component, it can adapt to the hoisting of concrete components of various shapes.

[0041] Specifically, refer to Figure 1 A cavity 411 is provided in the clamping seat 41, and a straight groove for sliding the clamping rod 42 is provided on one side wall of the cavity 411, and the straight groove is connected to the outer wall of one side of the clamping seat 41. The clamping rod 42 is slidably connected in the straight groove, and one end of the clamping rod 42 is located in the cavity 411 and the other end is located outside the clamping seat 41. A plurality of clamping rods 42 are provided and arranged in a rectangular array. The pneumatic component includes an air pump and an output pipe for connecting the output end of the air pump to the cavity 411. The air pressure in the cavity 411 is controlled by the pneumatic component, thereby driving the clamping rod 42 to slide in the straight groove. It should be noted that the pneumatic component is not shown in the figure.

[0042] Reference Figure 1 In order to prevent the clamping rod 42 from being separated from the clamping seat 41 , a limiting groove 412 is provided on the side wall of the straight groove, and a limiting block 421 is provided at one end of the clamping rod 42 , and the limiting block 421 is slidably connected in the limiting groove 412 .

[0043] Specifically, the drive assembly 3 is provided with four and corresponds to the four corners of the hanging plate respectively. The drive assembly 3 includes an adjustment screw rod 31 passing through the two hanging plates, and a drive motor 32 for driving the adjustment screw rod 31 to rotate. The drive motor 32 is rotated to drive the adjustment screw rod 31 to rotate, thereby driving the upper hanging plate to approach or move away from the lower hanging plate to adjust the distance between the two hanging plates.

[0044] Further, refer to Figure 1 , the two hanging plates are respectively the first hanging plate 1 and the second hanging plate 2, and the first hanging plate 1 is located above the second hanging plate 2. The clamping seat 41 on the first hanging plate 1 is located on the side of the first hanging plate 1 facing the second hanging plate 2, and the clamping seat 41 of the second hanging plate 2 is located on the side of the second hanging plate 2 away from the first hanging plate 1, and a through hole for the clamping rod 42 to pass through is provided on the second hanging plate 2. Before clamping, the prefabricated component is placed on the second hanging plate 2, and the clamping rod 42 does not contact the prefabricated component, so that the prefabricated component can be placed on the second hanging plate 2 more stably, rather than being pushed away from the second hanging plate 2 by the clamping rod 42. After the first hanging plate 1 exerts a force on the prefabricated component, the clamping rod 42 is driven to move relative to the clamping seat 41, so that the prefabricated component is better clamped.

[0045] Furthermore, the clamping seat 41 on the first hanging plate 1 is positioned and slidably connected to the first hanging plate 1. According to the different shapes of the prefabricated components, the clamping seat 41 can be slid to a suitable position, so that the prefabricated components can be clamped more stably.

[0046] Specifically, refer to Figure 2 The first hanging plate 1 includes two first cross bars 11 and two first vertical bars 12, and the two ends of the first cross bar 11 are respectively fixedly connected to a first vertical bar 12, and the two first cross bars 11 and the two first vertical bars 12 form a rectangle. The clamping seat 41 is sleeved and slidably connected to the first cross bar 11. The clamping seat 41 is threadedly connected with a fixing bolt 43 for tightening the first cross bar 11. When the clamping seat 41 needs to be adjusted, it is only necessary to loosen the fixing bolt 43 to drive the clamping seat 41 to slide on the first cross bar 11. The first vertical bar 12 includes a first movable vertical bar 121 and a first fixed vertical bar 122. There are two first fixed vertical bars 122, one of which is threadedly connected to the first movable vertical bar 121, and the other first fixed vertical bar 122 is threadedly connected to the first movable vertical bar 121. The first fixed vertical bar 122 is fixedly connected to the first cross bar 11 at one end away from the first movable vertical bar 121. The length of the first vertical rod 12 can be changed by screwing the first movable vertical rod 121. By changing the length of the first vertical rod 12 and sliding the clamping seat 41 on the first crossbar 11, the position of the clamping seat 41 can be adjusted on the entire horizontal plane of the hoisting plate, so that the clamping device can be adapted to hoist concrete components of various shapes.

[0047] Specifically, refer to Figure 1 The lifting lug 5 is installed on the clamping seat 41 corresponding to the first lifting plate 1, so as to facilitate better force application on the prefabricated component to be lifted.

[0048] Further, see Figure 2 The first hanging plate 1 also includes a first airbag 13, the four ends of which are respectively connected to the four clamping seats 41 of the first hanging plate 1, and the first airbag 13 covers the installation space surrounded by the four clamping seats 41. The first airbag 13 can press against the prefabricated component when the two hanging plates are close to each other, so that the prefabricated component is fixed more stably.

[0049] Further, refer to Figure 3 The second hoisting plate 2 includes a mounting plate 21 and four support rods 22. The four support rods 22 form a rectangle and are fixed to each other in pairs. The mounting plate 21 is provided with four clamping seats 41, and one mounting plate 21 corresponds to one clamping seat 41. The mounting plate 21 is fixedly connected to the angle formed by the two support rods 22, and the clamping seat 41 is installed on the mounting plate 21. The support rods 22 are retractable. Through the extension and retraction of the support rods 22, the clamping seat 41 can be adjusted in position on the entire horizontal plane of the hoisting plate, so that the clamping device can adapt to the hoisting of concrete components of various shapes.

[0050] Specifically, refer to Figure 3 The support rod 22 includes a movable rod 221 and a fixed rod 222. The fixed rod 222 is provided with two rods, one of which is threadedly connected to the movable rod 221, and the other fixed rod 222 is threadedly connected to the movable rod 221. The length of the support rod 22 can be changed by screwing the movable rod 221, so that the support rod 22 can be extended or retracted.

[0051] Further, refer to Figure 3 The second hoisting plate 2 also includes a reinforcing member 23, which includes a cross-shaped central rod 231 and sliding rods 232 slidably sleeved on the four ends of the central rod 231. The sliding rod 232 is connected to the movable rod 221 at one end of the central rod 231, and a second air bag 24 is provided between the sliding rods 232. The reinforcing member 23 is used to provide rigid support for the prefabricated component, and the second air bag 24 is used to provide flexible wrapping support for the prefabricated component, thereby reducing the clamping damage to the prefabricated component under the premise of stably clamping the prefabricated component, so as to better hoist the prefabricated component.

[0052] Example 2 The difference between Example 2 and Example 1 is that a first connecting pipe is provided between the clamping seat 41 corresponding to the first hanging plate 1 and the first airbag 13, and a second connecting pipe is provided between the clamping seat 41 corresponding to the second hanging plate 2 and the second airbag 24. The first connecting pipe connects the first airbag 13 and the cavity 411 in the clamping seat 41 corresponding to the first hanging plate 1. The second connecting pipe connects the second airbag 24 and the cavity 411 in the clamping seat 41 corresponding to the second hanging plate 2. An inflation valve is provided on both the first airbag 13 and the second airbag 24. When clamping the prefabricated component, the output pipe of the air pump is connected to the inflation valve, so as to inflate the first airbag 13, the second airbag 24 and the cavity 411, so that the clamping rod 42, the first airbag 13 and the second airbag 24 are pressed against the prefabricated component. Then the inflation valve is closed and the pneumatic component is removed. At this time, there is no need to synchronously hoist the pneumatic component, making the hoisting easier.

[0053] Example 3 The difference between Example 3 and Example 1 is that, referring to Figure 4 The adjusting screw rod 31 includes a first screw rod 311 threadedly connected to the first hanging plate 1, a first rotating rod 312 rotatably connected to the first screw rod 311, a second rotating rod 313 rotatably connected to the first rotating rod 312, and a second screw rod 314 rotatably connected to the second rotating rod 313. The second screw rod 314 is coaxially arranged with the first screw rod 311, and the second screw rod 314 is connected to the output end of the driving motor 312.

[0054] An adjustment assembly 6 for adjusting the clamping between the first rotating rod 312 and the second rotating rod 313 is provided between the first hanging plate 1 and the second hanging plate 2. The adjustment assembly 6 includes a first rod 61 fixedly connected to the first hanging plate 1, an active rod 62 rotatably connected to the first rod 61, a driven rod 63 rotatably connected to the active rod 62, and a second rod 64 rotatably connected to the driven rod 63. The second rod 64 is coaxially arranged with the first rod 61, and the second rod 64 is fixedly connected to the second hanging plate 2. The active rod 62 and the driven rod 63 are arranged at an angle. The active rod 62 and the driven rod 63 are rotationally connected by bolts and nuts. When it is necessary to fix the angle between the active rod 62 and the driven rod 63, it is only necessary to tighten the nut. When adjusting the distance between the two hanging plates, the nut can be loosened so that the active rod 62 can rotate relative to the driven rod 63 until the clamping is completed, and then the nut can be tightened.

[0055] After the prefabricated component is hoisted to a suitable floor position, the nut is loosened and the angle between the active rod 62 and the driven rod 63 is increased, thereby increasing the angle between the first rotating rod 312 and the second rotating rod 313 and increasing the distance between the two hoisting plates, so that the prefabricated component can be taken out more easily.

[0056] Example 4 The difference between Example 4 and Example 3 is that, referring to Figure 5 , Figure 6 and Figure 7 , the active rod 62 and the driven rod 63 are rotationally connected by a pin shaft. A fixing assembly 7 is also provided on one side of the second hanging plate 2. The fixing assembly 7 includes a fixing seat 71 fixedly connected to the lower end surface of the first hanging plate 1, a fixing block 72 slidably connected to the fixing seat 71, a force screw 73 and a force handle 74. The fixing block 72 is provided with two pieces, and the force screw 73 passes through the fixing block 72 and the fixing seat 71 and is rotationally connected to the fixing seat 71. The force screw 73 is threadedly connected to the fixing block 72. One end of the force screw 73 passes out of the fixing seat 71, and the force handle 74 is fixedly installed on the section. The distance between the fixing blocks 72 can be changed by screwing the force handle 74. In other embodiments, the force handle 74 can be a motor.

[0057] After the prefabricated components are hoisted to a suitable floor position, the floor slab enters between the two fixing blocks 72, and manually twisting the force application handle 74 can make the fixing blocks 72 clamp the floor slab, thereby making the unloading more stable.

[0058] Further, the force application screw rod 73 includes a first section 731 for connecting with the fixing block 72, and a second section 732 sleeved outside the first section 731. The first section 731 is provided with a spring jumping bean 733, and the inner wall of the second section 732 is provided with an embedding groove for accommodating the spring jumping bean 733.

[0059] The adjustment assembly 6 also includes a rotating sleeve 65 rotatably connected to the second hanging plate 2, and a push rod threadedly connected to the rotating sleeve 65 and passing through the second hanging plate 2. The rotating sleeve 65 is fixedly connected to the second hanging plate 2 along its axial direction. The push rod is circumferentially fixed relative to the second hanging plate 2. The second section 732 is sleeved with a first transmission gear 7321, and the rotating sleeve 65 is outerly provided with a second transmission gear 651. A force transmission rod 721 is rotatably connected to one of the fixed blocks 72, and a third transmission gear 7211 is provided on the force transmission rod 721. When the fixed block 72 clamps the floor slab, the first section 731 can no longer rotate. At this time, continuing to screw the second section 732 will cause the spring jumping bean 733 to leave the embedded groove, and the second section 732 can rotate relative to the first section 731. At this time, the third transmission gear 7211 enters between the first transmission gear 7321 and the second transmission gear 651, so that the driving force of the first transmission gear 7321 can be transmitted to the second transmission gear 651. At this time, the second section 732 continues to rotate, so that the rotating sleeve 65 can rotate and the push rod moves upward, thereby pushing the driven rod 63 upward, so that the distance between the two lifting plates becomes larger, so that the prefabricated component can be taken out more easily.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A clamping device for hoisting assembled prefabricated concrete components, characterized in that: The invention comprises two hanging plates, a driving assembly (3) arranged between the two hanging plates and used to drive the two hanging plates to move closer to or farther from each other, and a clamping assembly (4) arranged on the hanging plates, wherein the hanging plates are provided with hanging ears (5), and the clamping assembly (4) comprises a clamping seat (41) installed on the hanging plates and provided with a cavity (411) inside, a clamping rod (42) installed on the clamping seat (41) and used to press against the prefabricated component, and a pneumatic assembly for controlling the air pressure in the cavity (411), wherein the clamping seat (41) is provided with at least two pneumatic assemblies distributed on the hanging plates. At both ends of the mounting plate, a side wall of one side of the cavity (411) is provided with a straight groove for sliding a clamping rod (42), the straight groove being connected to an outer wall of one side of the clamping seat (41), a plurality of clamping rods (42) are provided and arranged in a rectangular array, the clamping rods (42) are slidably connected in the straight groove, one end of the clamping rod (42) is located in the cavity (411) and the other end is located outside the clamping seat (41); when hoisting the prefabricated component, part of the clamping rod (42) presses against the side wall of the prefabricated component, and part of the clamping rod (42) is supported on the outer wall of the prefabricated component.

2. The clamping device for hoisting assembled prefabricated concrete components according to claim 1 is characterized in that: At least four clamping seats (41) are provided and are distributed at the four corners of the hanging plate.

3. The clamping device for hoisting assembled prefabricated concrete components according to claim 2 is characterized in that: The two hanging plates are respectively a first hanging plate (1) and a second hanging plate (2); the clamping seat (41) on the first hanging plate (1) is located on a side of the first hanging plate (1) facing the second hanging plate (2); the clamping seat (41) is positioned and slidably connected to the first hanging plate (1).

4. The clamping device for hoisting assembled prefabricated concrete components according to claim 3 is characterized in that: The first hanging plate (1) comprises two first cross bars (11) and two first vertical bars (12), the two ends of the first cross bars (11) are respectively fixedly connected to a first vertical bar (12), the two first cross bars (11) and the two first vertical bars (12) form a rectangle, the clamping seat (41) is positioned and slidably connected to the first cross bars (11), and the first vertical bars (12) are telescopically arranged.

5. The clamping device for hoisting prefabricated concrete components according to claim 4 is characterized in that: The first hanging plate (1) further comprises a first airbag (13), the four ends of the first airbag (13) being respectively connected to four clamping seats (41) of the first hanging plate (1), and the first airbag (13) covers the installation space surrounded by the four clamping seats (41).

6. The clamping device for hoisting prefabricated concrete components according to claim 3 is characterized in that: The clamping seat (41) of the second hanging plate (2) is located on a side of the second hanging plate (2) away from the first hanging plate (1), and a through hole for the clamping rod (42) to pass through is provided on the second hanging plate (2).

7. The clamping device for hoisting prefabricated concrete components according to claim 6 is characterized in that: The second hanging plate (2) comprises a mounting plate (21) and four support rods (22); the four support rods (22) form a rectangle and are fixed to each other in pairs; the mounting plate (21) is provided with four clamping seats (41) corresponding to one mounting plate (21); the mounting plate (21) is fixedly connected to the angle formed by two support rods (22); the clamping seat (41) is mounted on the mounting plate (21); and the support rods (22) are telescopically arranged.

8. The clamping device for hoisting assembled prefabricated concrete components according to claim 7 is characterized in that: The support rod (22) comprises a movable rod (221) and a fixed rod (222); two fixed rods (222) are provided and are respectively threadedly connected to two ends of the movable rod (221); the movable rod (221) and the two fixed rods (222) are threadedly connected in opposite directions; the second hanging plate (2) further comprises a reinforcing member (23); the reinforcing member (23) is cross-shaped and is directly connected to the movable rod (221).

9. The clamping device for hoisting assembled prefabricated concrete components according to claim 8, characterized in that: The reinforcing member (23) comprises a cross-shaped central rod (231) and sliding rods (232) slidably sleeved on four ends of the central rod (231); one end of the sliding rod (232) is connected to the movable rod (221) through the central rod (231); and a second airbag (24) is provided between the sliding rods (232).

10. The clamping device for hoisting prefabricated concrete components according to claim 3, characterized in that: The driving assembly (3) comprises an adjusting screw (31) passing through the first hanging plate (1) and the second hanging plate (2), and a driving motor (32) for driving the adjusting screw (31) to rotate. The driving motor (32) is mounted on the second hanging plate (2). The adjusting screw (31) comprises a first screw (311) threadedly connected to the first hanging plate (1), a first rotating rod (312) rotatably connected to the first screw (311), a second rotating rod (313) rotatably connected to the first rotating rod (312), and a second screw (314) rotatably connected to the second rotating rod (313). The second screw (314) and the first screw (311) are coaxially arranged, and the second screw (314) is connected to the output end of the driving motor (32). An adjusting assembly (6) for adjusting the clamping between the first rotating rod (312) and the second rotating rod (313) is provided between the first hanging plate (1) and the second hanging plate (2).

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