Stop log gate

Abstract

The utility model relates to a stoplog gate, and belongs to the field of hydraulic engineering gates, the stoplog gate comprises two gate groove frames, a gate mechanism is arranged between the inner walls of the opposite sides of the two gate groove frames, a taking and placing mechanism is arranged on the opposite sides of the two gate groove frames, and the gate mechanism comprises a lower gate blade, two middle gate blades, an upper gate blade and four hanging rings. According to the stoplog gate, the stoplog gate is designed to be of a stoplog structure, the gate mechanism allows rapid assembly and disassembly, the efficiency of water retaining or overhauling operation in a water conservancy project is remarkably improved, the elastic sealing strips on the two sides of the gate blade and the foaming rubber layer at the bottom provide a better sealing effect, the water leakage problem is reduced, and the water retaining performance of the gate is improved; through the design of the positioning columns and the positioning holes, correct alignment of the brake blades during stacking is ensured, the stability of the whole structure is improved, the special-shaped steel pipes are continuously arranged and welded, the durability of the brake blades is improved, and inspection and maintenance are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of sluice gates in water conservancy projects, and specifically relates to a multi-layer flap gate. Background Art

[0002] As a simple water retaining structure, the multi-layer flap gate has a wide range of applications in water conservancy projects. It has the characteristics of simple structure, light self-weight, small lifting force, and convenient handling. The multi-layer flap gate uses multiple separate beams, which are placed horizontally into the gate slot one by one to form a flat water retaining structure; its structure is simple, with light self-weight, small lifting force, and convenient handling. However, since the water stop between the beams depends only on the self-weight or buoyancy of the beams to be stacked tightly, and the integrity of the water retaining structure is poor, and it seals by the water level difference, the water leakage is worse than that of the steel gate. Therefore, the multi-layer flap gate is suitable for use as a temporary water retaining or maintenance gate.

[0003] For example, a multi-layer flap gate with good sealing effect disclosed in the Chinese Patent Publication No. (CN211596676U) relates to the technical field of multi-layer flap gates, including a gate slot frame, a gate panel, and a lifting pulley. A sealing baffle is installed inside the gate slot frame, a sealing slide bar is installed on the back of the sealing baffle, a sealing layer is installed on the back of the sealing slide bar, a gate panel inlet is opened at the top of the gate slot frame, a lifting ring block is installed on the top of the gate panel, a lifting ring hole is opened inside the lifting ring block, a sealing chute is opened on the front of the gate panel, a rectangular groove is opened at the bottom of the gate panel, a sealing clamping groove is opened at the bottom of the gate panel, sealing clamping blocks are installed on the top of the gate panel, a sealing ring is installed on the top of the sealing clamping block, and the lifting pulley is installed directly above the gate slot frame. This multi-layer flap gate with good sealing effect has the advantage of strong sealing effect. The sealing clamping blocks of different gate panels can be inserted into the sealing clamping grooves to enhance the sealing between the gate panels, and the sealing slide bar can be inserted into the sealing chute to improve the overall sealing performance of the gate.

[0004] However, in the prior art exemplified by the above-mentioned disclosed patent, there is still a problem of poor convenience in taking and placing the gate leaves of the multi-layer flap gate. In the prior art, the structure of multiple gate leaves is used, and the gate leaves are taken and placed by pulling the lifting rings. In this solution, the gate leaves are placed in the gate slot frame, and the gate leaves also slide outside the sealing baffle to form a clamping structure, which may cause the gate to be easily impacted by water flow, resulting in misalignment and jamming at the clamping position, thus making it inconvenient to take out the gate leaves. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the present application provides a multi-layer flap gate, which has the advantages of high convenience in taking and placing the gate leaves, and solves the problem of poor convenience in taking and placing the gate leaves of the multi-layer flap gate.

[0006] To achieve the above object, the present application provides the following technical solution: A multi-layer flap gate, including two gate slot frames, a gate mechanism is provided between the inner walls of the opposite sides of the two gate slot frames, and a taking and placing mechanism is provided on the opposite sides of the two gate slot frames;

[0007] The gate mechanism includes a lower gate leaf, two middle gate leaves, an upper gate leaf and four lifting rings. The lower gate leaf is slidably connected between the opposite inner walls of two gate slot frames. Both of the two middle gate leaves are slidably connected between the opposite inner walls of two gate slot frames and are located above the lower gate leaf. The upper gate leaf is slidably connected between the opposite inner walls of two gate slot frames and is located above the middle gate leaves. The four lifting rings are respectively fixed to the fronts of the lower gate leaf, the two middle gate leaves and the upper gate leaf. Elastic sealing strips are fixed to the left and right sides of the lower gate leaf, the two middle gate leaves and the upper gate leaf.

[0008] The picking and placing mechanism includes a gantry, a rotating frame, rubber wheels, cables, a connecting frame, a fixed insertion block, a picking and placing clamping block, an insertion post, a cylinder and a positioning member. The inner walls on both sides of the gantry are respectively fixed to the opposite sides of the two gate slot frames. The rotating frame is fixed to the middle of the lower surface of the gantry. The rubber wheels are rotatably connected between the inner walls on the left and right sides of the rotating frame. The cables are wound around the outer sides of the rubber wheels, and the bottom ends of the cables are fixed to the connecting frame. The fixed insertion block is fixed to the right side of the lower surface of the connecting frame. A sliding opening is formed in the inner bottom wall of the connecting frame, and the picking and placing clamping block is slidably connected between the opposite inner walls of the sliding opening. The insertion post is horizontally fixed to the right side of the picking and placing clamping block. The cylinder is fixed to the inner bottom wall of the connecting frame, and the outer side of the output shaft of the cylinder is fixed to the outer side of the picking and placing clamping block. The positioning member is arranged on the left and right sides of the connecting frame to quickly position the positions of the lifting rings on different gate leaves.

[0009] By adopting this technical solution, by arranging the gate mechanism between the opposite inner walls of the gate slot frames and arranging the picking and placing mechanism on the opposite sides, the optimization of the structure and the effective utilization of space are realized. The design of the lifting rings of the gate mechanism facilitates the quick lifting and moving of the gate leaves, improving the convenience of operation.

[0010] Further, the positioning member includes two sliding clamps, two guide rails and four position sensors. The two sliding clamps are respectively fixed to the left and right sides of the connecting frame. The two guide rails are respectively vertically fixed to the fronts of the two gate slot frames, and the two sliding clamps are respectively slidably connected to the outer sides of the two guide rails. The four position sensors are all fixed to the front of the right gate slot frame and correspond to the positions of the four lifting rings respectively.

[0011] By adopting this technical solution, through the cooperation of the sliding clamps, the guide rails and the position sensors, the quick and accurate positioning of the positions of the lifting rings is realized, improving the accuracy and reliability of the picking and placing mechanism.

[0012] Further, a position induction receiver is fixed to the right side of the right sliding clamp, and the sliding clamp is in a U shape.

[0013] By adopting this technical solution, the setting of the position sensing receiver makes the positioning process more intelligent and improves the automation level of operation.

[0014] Furthermore, foamed rubber layers are fixed at the bottoms of the lower gate leaf, the two middle gate leaves and the upper gate leaf, and cross handles are welded on the outer sides of the lower gate leaf and the two middle gate leaves.

[0015] By adopting this technical solution, the foamed rubber layer at the bottom provides a better sealing effect, and the cross handle on the outer side enhances the convenience of manual operation.

[0016] Furthermore, the lower gate leaf, the two middle gate leaves and the upper gate leaf are all made of several continuously arranged and welded special-shaped steel pipes without interruption.

[0017] By adopting this technical solution, the continuous arrangement and welding of the special-shaped steel pipes enhance the structural strength and durability of the gate leaf.

[0018] Furthermore, positioning columns are fixed on the left and right sides of the upper surfaces of the lower gate leaf and the two middle gate leaves, and positioning holes corresponding to the positions of the positioning columns are provided on the lower surfaces of the upper gate leaf and the two middle gate leaves.

[0019] By adopting this technical solution, the design of the positioning columns and the positioning holes ensures the precise fit of the gate leaves when stacked and improves the stability of the overall structure.

[0020] Furthermore, a limiting plate is horizontally fixed on the outer side of the pick-and-place clamp block, and the length of the limiting plate is greater than the distance between the inner walls on the front and rear sides of the sliding opening.

[0021] By adopting this technical solution, the setting of the limiting plate effectively controls the moving range of the pick-and-place clamp block, prevents excessive movement, and ensures the safety of operation.

[0022] Furthermore, a connection hole for inserting the insertion post is provided on the left side of the fixed insertion block, and the diameter of the insertion post is equal to the inner diameter of the lifting ring cavity.

[0023] By adopting this technical solution, the design with the same inner diameter of the insertion post and the lifting ring cavity simplifies the connection operation and improves the working efficiency of the pick-and-place mechanism.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] 1. The laminated beam gate, designed as a laminated beam structure, allows for rapid assembly and disassembly of the gate mechanism, significantly improving the efficiency of water retaining or maintenance operations in water conservancy projects. The elastic sealing strips on both sides of the gate leaf and the foamed rubber layer at the bottom provide better sealing effects, reducing water leakage problems and enhancing the water retaining performance of the gate. Through the design of positioning columns and positioning holes, the correct alignment of the gate leaf during stacking is ensured, increasing the stability of the overall structure. The continuous and uninterrupted arrangement and welding of special-shaped steel pipes improve the durability of the gate leaf and facilitate inspection and maintenance.

[0026] 2. For this laminated beam gate, the picking and placing mechanism, driven by cylinders and with an automatic grasping mechanism, realizes the automatic picking and placing of the gate leaf, reducing the labor intensity of manual operation. The application of the split-type position sensing structure and the position sensing receiver ensures the precise positioning between the insertion post and the lifting ring, improving the accuracy of operation. The picking and placing mechanism can pick and place different gate leaves separately or connect the lower gate leaf for overall removal, providing operational flexibility and the ability to adapt to different working conditions. The automated picking and placing process reduces the risk of manual direct contact with heavy objects and improves the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the present application;

[0028] Figure 2 It is a schematic diagram of the gate mechanism of the present application;

[0029] Figure 3 It is a schematic diagram of the gate leaf of the present application;

[0030] Figure 4 It is a schematic diagram of the picking and placing mechanism of the present application.

[0031] In the figure: 1. Gate groove frame; 2. Gate mechanism; 21. Lower gate leaf; 22. Middle gate leaf; 23. Upper gate leaf; 24. Lifting ring; 25. Elastic sealing strip; 26. Foamed rubber layer; 27. Cross handle; 28. Positioning column; 3. Picking and placing mechanism; 31. Gantry; 32. Rotating frame; 33. Rubber wheel; 34. Cable; 35. Connecting frame; 36. Fixed insertion block; 37. Picking and placing clamping block; 38. Insertion post; 39. Cylinder; 310. Positioning part; 3101. Sliding clamp; 3102. Guide rail; 3103. Position sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0033] Please refer to Figure 1 , a stoplog gate in this embodiment includes two gate slots 1, a gate mechanism 2 is arranged between the inner walls on the opposite sides of the two pick-and-place clamping block gate slots 1, and a pick-and-place mechanism 3 is arranged on the opposite sides of the two pick-and-place clamping block gate slots 1.

[0034] Please refer to Figures 2 to 3 , for the convenience of assembling and using the stoplog gate, the pick-and-place clamping block gate mechanism 2 in this embodiment includes a lower gate leaf 21, two middle gate leaves 22, an upper gate leaf 23 and four lifting rings 24. The pick-and-place clamping block lower gate leaf 21 is slidably connected between the inner walls on the opposite sides of the two gate slots 1. The two pick-and-place clamping block middle gate leaves 22 are both slidably connected between the inner walls on the opposite sides of the two gate slots 1 and are located above the lower gate leaf 21. The pick-and-place clamping block upper gate leaf 23 is slidably connected between the inner walls on the opposite sides of the two gate slots 1 and is located above the middle gate leaf 22. The four pick-and-place clamping block lifting rings 24 are respectively fixed to the fronts of the lower gate leaf 21, the two middle gate leaves 22 and the upper gate leaf 23. The gate mechanism is composed of the lower gate leaf 21, the two middle gate leaves 22, the upper gate leaf 23 and the four lifting rings 24. These gate leaves are slidably connected between the inner walls on the opposite sides of the two gate slots 1 to form a vertically stacked structure. Elastic sealing strips 25 are fixed to the left and right sides of the pick-and-place clamping block lower gate leaf 21, the two middle gate leaves 22 and the upper gate leaf 23.

[0035] In this embodiment, foamed rubber layers 26 are fixed to the bottoms of the pick-and-place clamping block lower gate leaf 21, the two middle gate leaves 22 and the upper gate leaf 23. Elastic sealing strips 25 are fixed to the left and right sides of the gate leaves to ensure the sealing performance when blocking water. Cross handles 27 are welded to the outsides of the pick-and-place clamping block lower gate leaf 21 and the two middle gate leaves 22. The pick-and-place clamping block lower gate leaf 21, the two middle gate leaves 22 and the upper gate leaf 23 are all made of a number of continuously arranged and welded special-shaped steel pipes. Positioning columns 28 are fixed to the left and right sides of the upper surfaces of the pick-and-place clamping block lower gate leaf 21 and the two middle gate leaves 22. During installation, the positioning columns 28 and positioning holes ensure the accurate alignment of the gate leaves when stacked. The lifting rings 24 are fixed to the fronts of the gate leaves and are used to lift and move the gate leaves through the pick-and-place mechanism 3. Positioning holes corresponding to the positions of the positioning columns 28 are opened on the lower surfaces of the pick-and-place clamping block upper gate leaf 23 and the two middle gate leaves 22.

[0036] Please refer to Figure 4, in order to improve the picking and placing efficiency of the gate leaf, the picking and placing clamp block mechanism 3 in this embodiment includes a gantry 31, a rotating frame 32, rubber wheels 33, a cable 34, a connecting frame 35, a fixed insertion block 36, a picking and placing clamp block 37, an insertion post 38, a cylinder 39 and a positioning member 310. The inner walls on both sides of the picking and placing clamp block gantry 31 are respectively fixed to the opposite sides of the two gate slot frames 1. The picking and placing clamp block rotating frame 32 is fixed to the middle of the lower surface of the gantry 31. The picking and placing clamp block rubber wheels 33 are rotatably connected between the inner walls on the left and right sides of the rotating frame 32. The picking and placing clamp block cable 34 is wound around the outside of the rubber wheels 33, and the bottom end of the cable 34 is fixed to the connecting frame 35. The picking and placing clamp block fixed insertion block 36 is fixed to the right side of the lower surface of the connecting frame 35. A sliding opening is formed in the inner bottom wall of the picking and placing clamp block connecting frame 35, and the picking and placing clamp block 37 is slidably connected between the inner walls on the front and back sides of the sliding opening. The picking and placing clamp block insertion post 38 is horizontally fixed to the right side of the picking and placing clamp block 37. The picking and placing clamp block cylinder 39 is fixed to the inner bottom wall of the connecting frame 35, and the outside of the output shaft of the cylinder 39 is fixed to the outside of the picking and placing clamp block 37. The picking and placing clamp block positioning member 310 is arranged on the left and right sides of the connecting frame 35 to quickly locate the positions of the lifting rings 24 on different gate leaves. Through the cooperation of the sliding clamp 3101, the guide rail 3102 and the position sensor 3103, the quick and accurate positioning of the position of the lifting ring 24 is realized, and the accuracy and reliability of the picking and placing mechanism 3 are improved.

[0037] The picking and placing clamp block positioning member 310 includes two sliding clamps 3101, two guide rails 3102 and four position sensors 3103. The two picking and placing clamp block sliding clamps 3101 are respectively fixed to the left and right sides of the connecting frame 35. The two picking and placing clamp block guide rails 3102 are respectively vertically fixed to the fronts of the two gate slot frames 1, and the two sliding clamps 3101 are respectively slidably connected to the outsides of the two guide rails 3102. The four picking and placing clamp block position sensors 3103 are all fixed to the front of the right gate slot frame 1 and respectively correspond to the positions of the four lifting rings 24, ensuring that all components of the picking and placing mechanism 3, including the gantry 31, the rotating frame 32, the rubber wheels 33, the cable 34, the connecting frame 35, etc., are in good condition. Using the positioning member 310, including the sliding clamp 3101, the guide rail 3102 and the position sensor 3103, it moves above the target gate leaf. The four position sensors 3103 correspond to the positions of the four lifting rings 24, forming a split-type position sensing structure.

[0038] In this embodiment, a position sensing receiver is fixed on the right side of the right pick-and-place clamping block slider 3101. The shape of the pick-and-place clamping block slider 3101 is U-shaped, which is aligned with the position of the lifting ring 24. The cable 34 is released through the rubber wheel 33, so that the connecting frame 35 can be lowered above the gate leaf. The connecting frame 35 maintains a linear motion under the cooperation of the sliding block 3101 and the guide rail 3102. A limiting plate is horizontally fixed on the outside of the pick-and-place clamping block 37, and the length of the limiting plate is greater than the distance between the inner walls on both sides of the sliding opening. A connecting hole for inserting the insertion post 38 is opened on the left side of the pick-and-place clamping block fixed insertion block 36. When the connecting frame 35 moves to an appropriate position and the position sensing receiver is flush with the position sensor 3103, the receiver will receive the positioning information, remotely start the output shaft of the cylinder 39, drive the pick-and-place clamping block 37 and the insertion post 38 to move, so that the insertion post 38 passes through the lifting ring 24 and is inserted into the fixed insertion block 36 to achieve automatic clamping. The diameter of the pick-and-place clamping block insertion post 38 is equal to the inner diameter of the lifting ring 24. The cable 34 is pulled back to drive the gate leaf for pick-and-place operations. As needed, different gate leaves can be picked and placed separately, or the lower gate leaf 21 can be connected and taken out as a whole.

[0039] It should be noted that the position sensor 3103 is a layered acoustic sensor. Acoustic sensors are installed at different heights. When the receiver moves to a specific height, it will receive the acoustic wave signals at the corresponding height, and the height position is determined by calculating the time or phase difference of the acoustic wave propagation.

[0040] The working principle of the above embodiment is as follows:

[0041] (1) The gate mechanism is composed of a lower gate leaf 21, two middle gate leaves 22, an upper gate leaf 23 and four lifting rings 24. These gate leaves are slidably connected between the inner walls on the opposite sides of the two gate slots 1 to form a vertically stacked structure. During installation, the positioning posts 28 and positioning holes ensure the accurate alignment of the gate leaves during stacking. The lifting rings 24 are fixed on the front of the gate leaves and are used to lift and move the gate leaves through the pick-and-place mechanism 3. Elastic sealing strips 25 are fixed on the left and right sides of the gate leaves to ensure the sealing performance when blocking water.

[0042] (2) Ensure that all components of the picking and placing mechanism 3, including the gantry 31, the rotating frame 32, the rubber wheels 33, the cable 34, the connecting frame 35, etc., are in good condition. Use the positioning member 310, including the sliding clamp 3101, the guide rail 3102, and the position sensor 3103, to align with the position of the lifting ring 24. Release the cable 34 through the rubber wheels 33 so that the connecting frame 35 can be lowered above the gate leaf. The connecting frame 35 maintains a linear motion under the cooperation of the sliding clamp 3101 and the guide rail 3102 and moves above the target gate leaf. The four position sensors 3103 correspond to the positions of the four lifting rings 24 to form a split-type position sensing structure. When the connecting frame 35 moves to an appropriate position and the position sensing receiver is flush with the position sensor 3103, the receiver will receive the positioning information, remotely start the output shaft of the cylinder 39, drive the picking and placing clamp block 37 and the insertion post 38 to move, so that the insertion post 38 passes through the lifting ring 24 and inserts into the fixed insertion block 36 to achieve automatic clamping. The cable 34 is pulled back to drive the gate leaf for picking and placing operations. As needed, different gate leaves can be picked and placed separately, or the lower gate leaf 21 can be connected for overall removal.

Claims

1. A stoplog gate, comprising two gate slot frames (1), characterized in that: A gate mechanism (2) is provided between the inner walls of the two gate slot frames (1) on the opposite side, and a pick-and-place mechanism (3) is provided on the opposite side of the two gate slot frames (1); The gate mechanism (2) comprises a lower gate leaf (21), two middle gate leaves (22), an upper gate leaf (23) and four lifting rings (24); the lower gate leaf (21) is slidably connected between inner walls of two gate slot frames (1) on opposite sides; the two middle gate leaves (22) are slidably connected between inner walls of two gate slot frames (1) on opposite sides and are located above the lower gate leaf (21); the upper gate leaf (23) is slidably connected between inner walls of two gate slot frames (1) on opposite sides and is located above the middle gate leaf (22); the four lifting rings (24) are respectively fixed to the front sides of the lower gate leaf (21), the two middle gate leaves (22) and the upper gate leaf (23); elastic sealing strips (25) are fixed to the left and right sides of the lower gate leaf (21), the two middle gate leaves (22) and the upper gate leaf (23); The pick-and-place mechanism (3) comprises a gantry (31), a rotating frame (32), a rubber wheel (33), a cable (34), a connecting frame (35), a fixed plug block (36), a pick-and-place clamp block (37), a plug column (38), a cylinder (39) and a positioning member (310). The inner walls on both sides of the gantry (31) are respectively fixed to the opposite sides of the two gate slot frames (1). The rotating frame (32) is fixed to the middle part of the lower surface of the gantry (31). The rubber wheel (33) is rotatably connected between the inner walls on the left and right sides of the rotating frame (32). The cable (34) is wound around the outer side of the rubber wheel (33), and the cable (34) The bottom end is fixed to the connecting frame (35), the fixed plug block (36) is fixed to the right side of the lower surface of the connecting frame (35), the inner bottom wall of the connecting frame (35) is provided with a sliding opening, and the pick-up and placement clamp block (37) is slidably connected between the inner walls on both sides of the sliding opening, the plug column (38) is horizontally fixed to the right side of the pick-up and placement clamp block (37), the cylinder (39) is fixed to the inner bottom wall of the connecting frame (35), and the outer side of the output shaft of the cylinder (39) is fixed to the outer side of the pick-up and placement clamp block (37), and the positioning member (310) is arranged on the left and right sides of the connecting frame (35) to quickly locate the position of the lifting ring (24) on different gate blades.

2. A stoplog gate according to claim 1, characterized in that: The positioning member (310) comprises two sliding clamps (3101), two guide rails (3102) and four position sensors (3103); the two sliding clamps (3101) are respectively fixed to the left and right sides of the connecting frame (35); the two guide rails (3102) are respectively vertically fixed to the front sides of the two gate slot frames (1); and the two sliding clamps (3101) are respectively slidably connected to the outsides of the two guide rails (3102); and the four position sensors (3103) are all fixed to the front side of the right gate slot frame (1) and respectively correspond to the positions of the four lifting rings (24).

3. A stoplog gate according to claim 2, characterized in that: A position sensing receiver is fixed to the right side of the sliding clamp (3101) on the right side, and the shape of the sliding clamp (3101) is U-shaped.

4. A stoplog gate according to claim 1, characterized in that: A foam rubber layer (26) is fixed to the bottom of the lower gate leaf (21), the two middle gate leaves (22) and the upper gate leaf (23), and a cross handle (27) is welded to the outer side of the lower gate leaf (21) and the two middle gate leaves (22).

5. A stoplog gate according to claim 1, characterized in that: The lower gate blade (21), the two middle gate blades (22) and the upper gate blade (23) are all a plurality of special-shaped steel pipes that are continuously and uninterruptedly arranged and welded.

6. A stoplog gate according to claim 1, characterized in that: Positioning columns (28) are fixed on both left and right sides of the upper surfaces of the lower gate leaf (21) and the two middle gate leaves (22), and positioning holes corresponding to the positions of the positioning columns (28) are opened on the lower surfaces of the upper gate leaf (23) and the two middle gate leaves (22).

7. A stoplog gate according to claim 1, characterized in that: A limit plate is horizontally fixed on the outer side of the pick-and-place clamp block (37), and the length of the limit plate is greater than the distance between the inner walls on both sides of the sliding opening.

8. A stoplog gate according to claim 1, characterized in that: A connection hole for inserting a column (38) is provided on the left side of the fixed plug block (36), and the diameter of the column (38) is equal to the hole diameter of the inner cavity of the lifting ring (24).

Images