A bridge inspection hanger

Abstract

This invention discloses a bridge inspection bracket, relating to the field of bridge engineering technology. It includes a suspended platform (first type), with a stabilizing arm fixedly installed on one side and a channel stabilizing arm fixedly connected to the upper surface of the other side. A fixing plate is fixedly connected to the upper surface of the channel stabilizing arm. The invention works by movably fitting the right end of a second suspended platform into the inner cavity of the first suspended platform, causing the outer wall of the fixing plate to movably engage with the inner cavity of the first suspended platform. By rotating a turntable, gear one rotates, causing gears two and three to rotate under the action of a rotating rod. Gear three then rotates gear four, causing a ring gear to rotate. The ring gear then rotates a threaded rod, causing a fixed square column to move upwards into the inner cavity of the fixing plate under the action of a sliding rod. The fixing square column then fixes the fixing plate within the inner cavity of the first suspended platform.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and specifically to a bridge inspection bracket. Background Technology

[0002] In bridge construction, after the precast beams are installed and erected, there are many procedures that need to be carried out under the bridge, such as grouting the bottom of hollow slab beams, removing temporary supports for simple beams and connecting beams, and prestressing under the negative bending tendons of T-beams. At this time, bridge inspection hangers are required.

[0003] The existing technology has the following problems:

[0004] When in use, the existing bridge inspection brackets cannot safely cross the span according to different situations, and they sway significantly when moving. Summary of the Invention

[0005] The present invention provides a bridge inspection bracket to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A bridge inspection bracket includes a basket, a stabilizing arm is fixedly installed on one side of the basket, a channel stabilizing arm is fixedly connected to the upper surface of the other side of the basket, and a fixing plate is fixedly connected to the upper surface of the channel stabilizing arm.

[0008] A second suspended platform is movably fitted into the inner cavity of the first suspended platform. One side of the second suspended platform overlaps with one side of the first suspended platform. A counterweight mounting frame is fixedly connected to the second suspended platform. A turntable is movably fitted into the second suspended platform, with its upper end positioned above the second suspended platform. A gear 1 is fixedly connected to the lower surface of the turntable, meshing with a gear 2. A rotating rod is fixedly connected to one side of the gear 2, its outer wall movably fitted into the inner cavity of the second suspended platform. A gear 3 is fixedly connected to the other side of the rotating rod, meshing with a gear 4. The outer wall of the gear 4 movably fitted into the inner cavity of the second suspended platform. A ring gear meshes with the other side of the gear 4, its outer wall movably fitted into the inner cavity of the first suspended platform. A threaded rod is fixedly fitted into the ring gear, its outer wall movably fitted into the inner cavity of the first suspended platform.

[0009] A crossbeam walkway is fixedly connected to one side of the channel stabilizing arm. A suspended platform lift is fixedly connected to the lower surface of the crossbeam walkway. A support frame is fixedly connected to the lower surface of the suspended platform lift. A guide rod is movably sleeved in the inner cavity of the support frame. A support circular plate is fixedly sleeved on the outer wall of the guide rod. The outer wall of the support circular plate is movably sleeved with the inner cavity of the support frame.

[0010] A further improvement of the technical solution of the present invention is that: a fixed square column is threadedly sleeved on the outer wall of the threaded rod, the outer wall of the fixed square column is movably sleeved with the inner cavity of the first suspended basket, a sliding rod is slidably connected to the fixed square column, and the upper and lower sides of the sliding rod are fixedly connected to the inner cavity of the first suspended basket.

[0011] A further improvement of the technical solution of the present invention is that: a fixed insert plate is movably sleeved on the outer wall of the fixed square column, the outer wall of the fixed insert plate is movably sleeved with the inner cavity of the first suspended basket, and the other side of the fixed insert plate is fixedly connected to one side of the second suspended basket.

[0012] A further improvement of the technical solution of the present invention is as follows: a shock absorber is fixedly connected to the upper surface of the supporting circular plate and to one side of the guide rod; the upper end of the shock absorber is fixedly connected to the inner cavity of the support frame; a spring is fixedly connected to the lower surface of the supporting circular plate; the inner cavity of the spring is movably sleeved with the outer wall of the guide rod; a connecting rod is fixedly connected to the lower surface of the spring; the upper surface of the connecting rod is fixedly connected to the lower surface of the guide rod; the outer wall of the connecting rod is movably sleeved with the inner cavity of the support frame; a sealing ring is movably sleeved on the outer wall of the connecting rod; and a traveling mechanism for walking on the bridge body is connected to the bottom of the connecting rod and the stabilizing arm.

[0013] A further improvement of the technical solution of the present invention is that: the outer wall of the sealing ring is fixedly connected to the inner cavity of the support frame, the walking mechanism includes an electric walking chassis, the connecting rod is fixedly connected to the electric walking chassis, and the electric walking chassis is used to walk on the bridge body.

[0014] A further improvement of the technical solution of the present invention is that: a fixed cylinder is fixedly connected to the fixed plate, a sliding plate is movably sleeved on the outer wall of the fixed cylinder, the outer wall of the sliding plate is movably sleeved with the inner cavity of the fixed plate, and a spring is movably sleeved on the portion of the fixed cylinder above the sliding plate.

[0015] A further improvement of the technical solution of the present invention is that: the lower end of the second spring is fixedly connected to the slide plate, and connecting plates are fixedly connected to both sides of the slide plate.

[0016] A further improvement of the technical solution of the present invention is that: a steel rope is fixedly connected to the connecting plate, a lifting ring is fixedly connected to the steel rope, and the lower end of the lifting ring is fixedly connected to the connecting plate.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0018] 1. This invention provides a bridge inspection bracket, comprising a suspended basket 1, a turntable, a suspended basket 2, a counterweight mounting frame, gear 1, gear 2, a rotating rod, gear 3, gear 4, a ring gear, a threaded rod, a fixed square column, a sliding rod, and a fixed insert plate, which work together. The right end of the suspended basket 2 is movably fitted into the inner cavity of the suspended basket 1, causing the outer wall of the fixed insert plate to movably fit into the inner cavity of the suspended basket 1. Rotating the turntable causes gear 1 to rotate, which in turn causes gears 2 and 3 to rotate under the action of the rotating rod. Gear 3, in turn, causes gear 4 to rotate, which in turn causes the ring gear to rotate. The ring gear, in turn, causes the threaded rod to rotate, thus causing the fixed square column to move under the sliding rod. Under the action of the lifting device, the suspension basket moves upward into the inner cavity of the fixed plate. Through the action of the fixed square column, the fixed plate is fixed in the inner cavity of the first suspension basket, thereby fixing the second suspension basket to the left side of the first suspension basket. When it is necessary to cross the span, the stabilizing arm is disassembled, so that the first suspension basket and the channel stabilizing arm are kept stable under the balance of the counterweight mounting frame. Thus, the first suspension basket moves to the left to one side of the bridge body under the action of the lifting device. Through the movement of the lifting device, the first suspension basket and the stabilizing arm move across the span, so that the device is balanced and lifted across the span under the action of the lifting device. If the ground under the bridge is flat, the under-bridge transfer equipment can also be used to cross the span, thereby achieving the goal of crossing the span according to different situations, with lower operating costs and more outstanding benefits.

[0019] 2. This invention provides a bridge inspection bracket, which employs the cooperation of a support frame, guide rod, support circular plate, shock absorber, spring 1, connecting rod, and electric travel chassis. Through the action of spring 1 and guide rod, a certain buffer is provided between the connecting rod and the support frame, thereby providing a certain buffer for the electric travel chassis during use. At the same time, through the action of the shock absorber fixedly connected to the upper surface of the support circular plate, vibration is reduced between the support circular plate and the support frame, so that the electric travel chassis will not affect the bridge inspection bracket when moving, thereby achieving the purpose of shock absorption and reducing shaking during movement.

[0020] 3. This invention provides a bridge inspection hanger, which employs the cooperation of a fixed cylinder, a sliding plate, a second spring, a connecting plate, a steel rope, a lifting ring, and a fixed plate. Through the action of the fixed cylinder and the second spring, the sliding plate has a certain buffer space within the cavity of the fixed plate. Through the action of the connecting plate and the steel rope, the lifting ring is fixed above the fixed plate. Through the lifting device, the lifting ring is moved upward, thereby moving the bridge inspection hanger upward. During the movement, through the action of the second spring and the fixed cylinder, the bridge inspection hanger can have a certain buffer during movement, thereby reducing large swaying and achieving the purpose of buffering during lifting. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2This is a cross-sectional structural diagram of the present invention;

[0023] Figure 3 This is an enlarged structural diagram of point A in the present invention;

[0024] Figure 4 This is an enlarged structural diagram of section B in the present invention;

[0025] Figure 5 This is an enlarged structural diagram at point C of the present invention;

[0026] Figure 6 This is an enlarged structural diagram of point D in the present invention.

[0027] In the diagram: 1. Suspended platform one; 2. Stabilizing arm; 3. Channel stabilizing arm; 4. Fixed plate; 11. Turntable; 12. Suspended platform two; 13. Counterweight mounting frame; 14. Gear one; 15. Gear two; 16. Rotating rod; 17. Gear three; 18. Gear four; 19. Ring gear; 110. Threaded rod; 111. Fixed square column; 112. Slide rod; 113. Fixed insert plate; 31. Crossbeam walkway; 32. Suspended platform lift; 33. Support frame; 34. Guide rod; 35. Support circular plate; 36. Shock absorber; 37. Spring one; 38. Connecting rod; 39. Sealing ring; 310. Electric walking chassis; 311. Bridge body; 41. Fixed column; 42. Slide plate; 43. Spring two; 44. Connecting plate; 45. Steel rope; 46. Lifting ring. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to embodiments:

[0029] Example 1

[0030] like Figure 1-6As shown, the present invention provides a bridge inspection hanger, including a first basket 1, a stabilizing arm 2 fixedly installed on one side of the first basket 1, a channel stabilizing arm 3 fixedly connected to the upper surface of the other side of the first basket 1, a fixing plate 4 fixedly connected to the upper surface of the channel stabilizing arm 3, a second basket 12 movably sleeved in the inner cavity of the first basket 1, one side of the second basket 12 overlapping with one side of the first basket 1, a counterweight mounting frame 13 fixedly connected to the second basket 12, a turntable 11 movably sleeved in the second basket 12, the upper end of the turntable 11 being located above the second basket 12, a gear 14 fixedly connected to the lower surface of the turntable 11, the gear 14 meshing with a gear 2 15, a rotating rod 16 fixedly connected to one side of the gear 2 15, the outer wall of the rotating rod 16 movably sleeved in the inner cavity of the second basket 12, and the other side of the rotating rod 16... A gear 317 is fixedly connected to one side, and a gear 418 meshes with the gear 317. The outer wall of the gear 418 is movably sleeved with the inner cavity of the second basket 12. A ring gear 19 meshes with the other side of the gear 418. The outer wall of the ring gear 19 is movably sleeved with the inner cavity of the first basket 1. A threaded rod 110 is fixedly sleeved with the ring gear 19. The outer wall of the threaded rod 110 is movably sleeved with the inner cavity of the first basket 1. A crossbeam walkway 31 is fixedly connected to one side of the channel stabilizing arm 3. A basket lift 32 is fixedly connected to the lower surface of the crossbeam walkway 31. A support frame 33 is fixedly connected to the lower surface of the basket lift 32. A guide rod 34 is movably sleeved with the inner cavity of the support frame 33. A support circular plate 35 is fixedly sleeved with the outer wall of the guide rod 34. The outer wall of the support circular plate 35 is movably sleeved with the inner cavity of the support frame 33.

[0031] In this embodiment, the right end of the second suspended basket 12 is movably fitted into the inner cavity of the first suspended basket 1, so that the outer wall of the fixed insert plate 113 is movably fitted into the inner cavity of the first suspended basket 1. By rotating the turntable 11, the first gear 14 is rotated, thereby causing the second gear 15 and the third gear 17 to rotate under the action of the rotating rod 16. Through the action of the third gear 17, the fourth gear 18 is rotated, thereby causing the ring gear 19 to rotate. Through the action of the ring gear 19, the threaded rod 110 is rotated, thereby causing the fixed square column 111 to move upward into the inner cavity of the fixed insert plate 113 under the action of the sliding rod 112. Through the action of the fixed square column 111, the fixed insert plate 113 is fixed in the inner cavity of the first suspended basket 1, thereby fixing the second suspended basket 12 to the left side of the first suspended basket 1. Through the action of the counterweight mounting frame 13, the device is balanced and lifted across the span under the action of the lifting device. If the site under the bridge is flat, the under-bridge transfer equipment can also be used to cross the span.

[0032] Example 2

[0033] like Figure 1-6As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a fixed square column 111 is threadedly sleeved on the outer wall of the threaded rod 110, the outer wall of the fixed square column 111 is movably sleeved with the inner cavity of the first suspended basket 1, a sliding rod 112 is slidably connected to the fixed square column 111, the upper and lower sides of the sliding rod 112 are fixedly connected with the inner cavity of the first suspended basket 1, a fixed insert plate 113 is movably sleeved on the outer wall of the fixed square column 111, the outer wall of the fixed insert plate 113 is movably sleeved with the inner cavity of the first suspended basket 1, and the other side of the fixed insert plate 113 is fixedly connected with one side of the second suspended basket 12.

[0034] In this embodiment, the right end of the second suspended basket 12 is movably fitted into the inner cavity of the first suspended basket 1, so that the outer wall of the fixed insert plate 113 is movably fitted into the inner cavity of the first suspended basket 1. By rotating the turntable 11, the first gear 14 is rotated, thereby causing the second gear 15 and the third gear 17 to rotate under the action of the rotating rod 16. Through the action of the third gear 17, the fourth gear 18 is rotated, thereby causing the ring gear 19 to rotate. Through the action of the ring gear 19, the threaded rod 110 is rotated, thereby causing the fixed square column 111 to move upward into the inner cavity of the fixed insert plate 113 under the action of the sliding rod 112. The function of the device is to fix the fixed plate 113 in the inner cavity of the first suspended basket 1, thereby fixing the second suspended basket 12 to the left side of the first suspended basket 1. The stabilizing arm 2 is disassembled, so that the first suspended basket 1 and the channel stabilizing arm 3 are kept stable under the balance of the counterweight mounting frame. This allows the first suspended basket 1 to move to the left to one side of the bridge body 311 under the action of the lifting device. By moving the lifting device, the first suspended basket 1 and the stabilizing arm 2 are moved across the span, so that the device is balanced and lifted across the span under the action of the lifting device. If the ground under the bridge is flat, the under-bridge transfer equipment can also be used to cross the span, thereby achieving the goal of crossing the span according to different situations with lower operating costs and more outstanding benefits.

[0035] Example 3

[0036] like Figure 1-6As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a shock absorber 36 is fixedly connected to the upper surface of the supporting circular plate 35 and to one side of the guide rod 34. The upper end of the shock absorber 36 is fixedly connected to the inner cavity of the support frame 33. A spring 37 is fixedly connected to the lower surface of the supporting circular plate 35. The inner cavity of the spring 37 is movably sleeved with the outer wall of the guide rod 34. A connecting rod 38 is fixedly connected to the lower surface of the spring 37. The upper surface of the connecting rod 38 is fixedly connected to the lower surface of the guide rod 34. The outer wall of the connecting rod 38 is movably sleeved with the inner cavity of the support frame 33. A sealing ring 39 is movably sleeved with the outer wall of the connecting rod 38. A traveling mechanism for traveling on the bridge body 311 is connected to the bottom of the connecting rod 38 and the stabilizing arm 2. The outer wall of the sealing ring 39 is fixedly connected to the inner cavity of the support frame 33. The traveling mechanism includes an electric traveling chassis 310. The connecting rod 38 is fixedly connected to the electric traveling chassis 310. The electric traveling chassis 310 is used to travel on the bridge body 311.

[0037] In this embodiment, the spring 37 and the guide rod 34 provide a certain buffer between the connecting rod 38 and the support frame 33, thus providing a certain buffer for the electric walking chassis 310 during use. At the same time, the shock absorber 36, which is fixedly connected to the upper surface of the support plate 35, reduces vibration between the support plate 35 and the support frame 33, so that the electric walking chassis 310 will not affect the bridge inspection bracket when moving, thereby achieving the purpose of shock absorption and reducing shaking during movement.

[0038] Example 4

[0039] like Figure 1-6 As shown, based on Embodiment 1, the present invention provides a technical solution: Preferably, a fixed cylinder 41 is fixedly connected to a fixed plate 4, a sliding plate 42 is movably sleeved on the outer wall of the fixed cylinder 41, the outer wall of the sliding plate 42 is movably sleeved with the inner cavity of the fixed plate 4, a second spring 43 is movably sleeved on the portion of the fixed cylinder 41 above the sliding plate 42, the lower end of the second spring 43 is fixedly connected to the sliding plate 42, connecting plates 44 are fixedly connected to both sides of the sliding plate 42, steel ropes 45 are fixedly connected to the connecting plates 44, lifting rings 46 are fixedly connected to the steel ropes 45, and the lower end of the lifting rings 46 is fixedly connected to the connecting plates 44.

[0040] In this embodiment, the fixed cylinder 41 and the second spring 43 provide a certain buffer space for the slide plate 42 within the inner cavity of the fixed plate 4. The connecting plate 44 and the steel rope 45 fix the lifting ring 46 above the fixed plate 4. The lifting device moves the lifting ring 46 upward, thereby moving the bridge inspection bracket upward. During the movement, the second spring 43 and the fixed cylinder 41 provide a certain buffer, thereby reducing large swaying and facilitating buffering during lifting.

[0041] The working principle of this bridge inspection bracket will be explained in detail below.

[0042] like Figure 1-6 As shown, after completing the lower part of the current span construction, the scaffolding needs to be switched to the previous span for operation. This is achieved by movably connecting the right end of the second suspended platform 12 into the inner cavity of the first suspended platform 1, thus movably connecting the outer wall of the fixed insert plate 113 with the inner cavity of the first suspended platform 1. Rotating the turntable 11 causes the first gear 14 to rotate, which in turn causes the second gear 15 and the third gear 17 to rotate under the action of the rotating rod 16. The action of the third gear 17 causes the fourth gear 18 to rotate, which in turn causes the ring gear 19 to rotate. The action of the ring gear 19 causes the threaded rod 110 to rotate, thereby causing the fixed square column 111 to... Under the action of the sliding rod 112, it moves upward into the inner cavity of the fixed insert plate 113. Through the action of the fixed square column 111, the fixed insert plate 113 is fixed in the inner cavity of the first suspended basket 1, thereby fixing the second suspended basket 12 to the left side of the first suspended basket 1. When it is necessary to cross the span, the stabilizing arm 2 is disassembled, so that the first suspended basket 1 and the channel stabilizing arm 3 are kept stable under the balance of the counterweight mounting frame, thereby allowing the first suspended basket 1 to move to the left side of the bridge body 311 under the action of the lifting device. Through the movement of the lifting device, the first suspended basket 1 and the stabilizing arm 2 move across the span, thereby allowing the device to move under the action of the lifting device. The balanced lifting process involves moving the lifting basket 1 below 311 using a lifting device. The fixed cylinder 41 and spring 43 provide a buffer space for the sliding plate 42 within the cavity of the fixed plate 4. The connecting plate 44 and steel cable 45 fix the lifting ring 46 above the fixed plate 4. The lifting device then moves the lifting ring 46 upwards, thereby moving the bridge inspection frame upwards. During this movement, the spring 43 and fixed cylinder 41 provide cushioning, reducing large swaying. If the area under the bridge is flat, this process can also be achieved... When using under-bridge transport equipment to cross the span, the electric hoist on the upper part of the hanging frame is used to lower the construction hanging frame and transport it to the front span by transport vehicles or excavators. At this time, there is no need to add a counterweight section. Through the action of spring 37 and guide rod 34, there is a certain buffer between the connecting rod 38 and the support frame 33, so that the electric walking chassis 310 can have a certain buffer during use. At the same time, through the action of the shock absorber 36 fixedly connected to the upper surface of the support circular plate 35, the support circular plate 35 and the support frame 33 can be damped, so that the electric walking chassis 310 will not affect the bridge inspection hanging frame when moving.

[0043] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A bridge inspection bracket, comprising a suspended basket (1), characterized in that: A stabilizing arm (2) is fixedly installed on one side of the suspended basket (1), and a channel stabilizing arm (3) is fixedly connected to the upper surface of the other side of the suspended basket (1). A fixing plate (4) is fixedly connected to the upper surface of the channel stabilizing arm (3). The inner cavity of the first suspended basket (1) is movably fitted with a second suspended basket (12). One side of the second suspended basket (12) overlaps with one side of the first suspended basket (1). A counterweight mounting bracket (13) is fixedly connected to the second suspended basket (12). A turntable (11) is movably fitted to the second suspended basket (12). The upper end of the turntable (11) is located above the second suspended basket (12). A gear (14) is fixedly connected to the lower surface of the turntable (11). The gear (14) meshes with a gear (15). A rotating rod (16) is fixedly connected to one side of the gear (15). The outer wall of the rotating rod (16) is movably connected to the inner cavity of the second (12) of the basket. The other side of the rotating rod (16) is fixedly connected to the gear three (17). The gear three (17) meshes with the gear four (18). The outer wall of the gear four (18) is movably connected to the inner cavity of the second (12) of the basket. The other side of the gear four (18) meshes with the ring gear (19). The outer wall of the ring gear (19) is movably connected to the inner cavity of the first (1) of the basket. The ring gear (19) is fixedly connected to the threaded rod (110). The outer wall of the threaded rod (110) is movably connected to the inner cavity of the first (1) of the basket. A crossbeam walkway (31) is fixedly connected to one side of the channel stabilizing arm (3). A suspended platform lift (32) is fixedly connected to the lower surface of the crossbeam walkway (31). A support frame (33) is fixedly connected to the lower surface of the suspended platform lift (32). A guide rod (34) is movably sleeved in the inner cavity of the support frame (33). A support circular plate (35) is fixedly sleeved on the outer wall of the guide rod (34). The outer wall of the support circular plate (35) is movably sleeved with the inner cavity of the support frame (33). The outer wall of the threaded rod (110) is threaded with a fixed square column (111), the outer wall of the fixed square column (111) is movably sleeved with the inner cavity of the first hanging basket (1), the fixed square column (111) is slidably connected with a sliding rod (112), the upper and lower sides of the sliding rod (112) are fixedly connected with the inner cavity of the first hanging basket (1); the outer wall of the fixed square column (111) is movably sleeved with a fixed insert plate (113), the outer wall of the fixed insert plate (113) is movably sleeved with the inner cavity of the first hanging basket (1), the other side of the fixed insert plate (113) is fixedly connected with one side of the second hanging basket (12); a shock absorber is fixedly connected to the upper surface of the supporting circular plate (35) and one side of the guide rod (34). 36), the upper end of the shock absorber (36) is fixedly connected to the inner cavity of the support frame (33), the lower surface of the support circular plate (35) is fixedly connected to a spring (37), the inner cavity of the spring (37) is movably sleeved with the outer wall of the guide rod (34), the lower surface of the spring (37) is fixedly connected to a connecting rod (38), the upper surface of the connecting rod (38) is fixedly connected to the lower surface of the guide rod (34), the outer wall of the connecting rod (38) is movably sleeved with the inner cavity of the support frame (33), the outer wall of the connecting rod (38) is movably sleeved with a sealing ring (39), and the bottom of the connecting rod (38) and the stabilizing arm (2) are connected to a walking mechanism for walking on the bridge body (311); The outer wall of the sealing ring (39) is fixedly connected to the inner cavity of the support frame (33). The walking mechanism includes an electric walking chassis (310). The connecting rod (38) is fixedly connected to the electric walking chassis (310). The electric walking chassis (310) is used to walk on the bridge body (311). The fixed plate (4) is fixedly connected to a fixed cylinder (41). The outer wall of the fixed cylinder (41) is movably sleeved with a sliding plate (42). The outer wall of the sliding plate (42) is movably sleeved with the inner cavity of the fixed plate (4). The part of the fixed cylinder (41) above the sliding plate (42) is movably sleeved with a spring (43). The lower end of the second spring (43) is fixedly connected to the slide plate (42), and the two sides of the slide plate (42) are fixedly connected to the connecting plates (44). The connecting plate (44) is fixedly connected to a steel rope (45), and the steel rope (45) is fixedly connected to a lifting ring (46). The lower end of the lifting ring (46) is fixedly connected to the connecting plate (44).

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