Suspension type buffer anti-falling device for inspection well

Abstract

This invention provides a suspended buffer anti-fall device for inspection wells, belonging to the technical field of anti-fall devices. It solves the problems of current commercially available anti-fall devices requiring drilling into the well wall, leading to installation difficulties, inconvenient maintenance, incompatibility between buffer performance and structural strength, and poor versatility. This suspended buffer anti-fall device for inspection wells includes an inspection well, a load-bearing component, and a buffer anti-fall component. The load-bearing component includes a load-bearing ring and a lead screw. Multiple bases are fixed to the top of the load-bearing ring, and hollow sleeves are fixed to the top of the bases via connectors. A buffer structure is provided at the top of the hollow sleeve, including a first return spring. The buffer anti-fall component includes a connecting ring, with a receiving plate fixed inside the connecting ring. The tops of the multiple first return springs are fixed to the bottom of the connecting ring, and the lead screw passes through and extends to the top of the receiving plate. This invention has the advantages of simple installation, convenient maintenance, good buffer performance, certain structural strength, and high versatility.

Description

Technical Field

[0001] This invention belongs to the technical field of fall protection devices, and relates to a suspended buffer fall protection device, particularly a suspended buffer fall protection device for inspection wells. Background Technology

[0002] Inspection wells are installed for the maintenance of urban underground infrastructure, typically at pipe junctions, bends, and straight sections. However, accidents involving falls into wells due to missing, damaged, or loosely installed covers occur frequently, posing a serious threat to pedestrian safety.

[0003] Currently, fall arrest devices on the market mainly fall into two categories: flexible nylon fall arrest nets and rigid composite material fall arrest grids. Whether it is a fall arrest net fixed with expansion bolts or a fall arrest grid with a structure with pre-embedded hooks, holes need to be drilled in the well wall. This is not only cumbersome to construct, but also makes the metal parts prone to rusting and "locking up" in humid environments, resulting in the need for destructive removal during replacement and low maintenance efficiency. At the same time, fall arrest grids are mostly rigid connections, which, although strong, lack cushioning. When falling, the impact force acts directly on the fixing point and the well wall, which can easily cause structural damage. Flexible nets, although they have a certain degree of elasticity, have uncontrollable cushioning, and their strength decreases significantly after aging. They also cannot adapt to well openings of different sizes, resulting in poor versatility. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a suspended buffer anti-fall device for inspection wells. The technical problem to be solved by this invention is: how to make the buffer anti-fall device simple to install, easy to maintain, and with good buffering performance, while also having a certain structural strength and high versatility.

[0005] The objective of this invention can be achieved through the following technical solutions: A suspended buffer anti-fall device for inspection wells includes an inspection well, a load-bearing component, and a buffer anti-fall component. The load-bearing component includes a load-bearing ring and a lead screw. Multiple bases are fixedly provided at the top of the load-bearing ring, and hollow sleeves are fixedly provided at the top of the bases through connectors. A buffer structure is provided at the top of the hollow sleeves, and the buffer structure includes a first return spring. The buffer anti-fall assembly includes a connecting ring, a receiving plate is fixed inside the connecting ring, the top ends of a plurality of first reset springs are fixed to the bottom end of the connecting ring, and the lead screw passes through and extends to the top end of the receiving plate; The outer wall of the bearing ring has multiple through holes, and the inner wall of the bearing ring is fixed with multiple limiting plates. The limiting plates have limiting holes inside, and the limiting holes have through grooves inside. The limiting holes communicate with the through holes. The outer wall of the lead screw is threaded with an internal threaded ring. The internal threaded ring has a rotating groove inside, and the outer wall of the rotating groove has an annular groove. Multiple sliding rods are rotatably connected inside the rotating groove. A connecting frame is fixed on one side of the sliding rod. The connecting frame is slidably connected to the annular groove. A rotating frame is rotatably connected to the other end of the connecting frame, and a moving block is rotatably connected to the other end of the rotating frame. An abutment foot is fixed to the other end of the moving block. The abutment foot is frictionally fixed to the inner wall of the inspection well. The moving block is slidably connected inside the limiting holes and through holes.

[0006] The working principle of this invention is as follows: During installation, the bearing ring is placed inside the inspection well, 10-20 cm away from the well opening. Then, the screw is rotated to make the internal threaded ring rotate and move downward along the screw. Then, with the cooperation of the annular groove and the rotating groove, the sliding rod and the connecting frame move vertically downward. The downward movement of the connecting frame pushes the rotating frame to rotate and move downward, which in turn pushes the moving block to move forward along the limiting hole and the through hole. This pushes the contact foot to press and fix it to the inner wall of the inspection well, completing the suspension fixation. It is suitable for inspection wells of different diameters. The same principle applies to maintenance and disassembly. When a person or object falls into the manhole, it first impacts the receiving plate. At this time, the receiving plate moves downward under the force, which in turn moves the connecting ring downward. The downward movement of the connecting ring compresses the buffer structure. Under the action of the buffer structure, the impact force is absorbed and eliminated. Thus, this suspended buffer anti-fall device for the manhole is simple to install, easy to maintain, has good buffering performance, has a certain structural strength, and is highly versatile.

[0007] A piston is fixed at the bottom end of the first reset spring, and a first positioning rod is fixed at the top end of the piston. The top end of the first positioning rod is fixed to the bottom end of the connecting ring, and the piston is slidably connected inside the hollow sleeve.

[0008] With the above structure, the connecting ring moves down and squeezes the first return spring. The first return spring absorbs part of the force and contracts, while the other part of the force is transmitted to the inside of the piston. At this time, the piston moves down under force, and the first positioning rod limits the contraction position of the first return spring to prevent the first return spring from twisting or deforming when it contracts, thereby increasing the service life of the first return spring.

[0009] The piston has a piston rod fixed at its bottom end, and the piston rod is slidably connected to the inside of the hollow sleeve, which is filled with inert gas.

[0010] With the above structure, the piston moves down and compresses the inert gas inside the hollow sleeve. At this time, the inert gas is compressed by the force and converts mechanical energy into heat energy, further increasing the buffering effect.

[0011] The base has a friction groove inside, and the cross-section of the friction groove is trapezoidal. A connecting block is fixed at the bottom of the piston rod. A second positioning rod is slidably connected around the connecting block. A friction block is fixed at the other end of the second positioning rod. A second return spring is fixed between the friction block and the connecting block.

[0012] Using the above structure, the piston moves downward, pushing the piston rod downward, which in turn drives the connecting block downward. The downward movement of the connecting block causes the friction block to squeeze and rub against the friction groove, absorbing the impact force again and thus stabilizing the buffering effect. At this time, the friction block moves backward under force, pushing the second return spring to absorb energy and contract, which in turn causes the friction force between the friction block and the friction groove to increase smoothly until the impact force is completely absorbed, thereby increasing its smoothness, completing a stable buffering and anti-fall, and increasing safety and comfort.

[0013] The cross-section of the receiving plate is an isosceles right triangle, and multiple water passage grooves are provided inside the receiving plate. A protective sleeve is movably snapped onto the top of the receiving plate.

[0014] With the above structure, the protective sleeve can easily protect the lead screw, and the water channel can be used in conjunction with the receiving plate to prevent water accumulation and siltation.

[0015] The receiving plate is made of carbon fiber reinforced polyurethane composite material, and the protective sleeve is also made of carbon fiber reinforced polyurethane composite material.

[0016] With the above structure, carbon fiber reinforced polyurethane composite material has the characteristics of high strength and light weight, and is easy to install and disassemble.

[0017] The bottom end of the bearing ring is fixedly provided with a fixed frame, and the top end of the fixed frame is fixedly provided with a limiting rod. The bottom end of the lead screw is rotatably connected to the limiting rod, and the top end of the lead screw is fixedly connected with a turntable.

[0018] The above structure, with the cooperation of the fixing frame and the limiting rod, limits the position of the lead screw to prevent it from deviating during rotation, and the turntable makes it easy for the user to rotate the lead screw.

[0019] Multiple rubber blocks are fixed on the side of the contact foot near the inner wall of the inspection well, and multiple anti-slip grooves are opened on the side of the contact foot near the inner wall of the inspection well. Multiple ground-inserting rods are fixed inside the anti-slip grooves.

[0020] The above structure, with the use of anti-slip grooves, grounding rods and rubber blocks, increases the surface friction of the contact foot, further increasing the connection stability between the contact foot and the inner wall of the inspection well.

[0021] Compared with existing technologies, this suspended buffer anti-fall device for inspection wells has the following advantages: This invention utilizes a rotating screw to cause the internal threaded ring to rotate and move downwards along the screw. This, in turn, with the cooperation of the annular groove and the rotating groove, drives the sliding rod and connecting frame to move vertically downwards. The downward movement of the connecting frame pushes the rotating frame to rotate downwards, which in turn pushes the moving block forward along the limiting hole and through hole. This pushes the contact foot to press and fix against the inner wall of the inspection well, completing the suspended fixation. This method is suitable for inspection wells of different diameters. The same principle applies during maintenance and disassembly. When a person or object falls into the inspection well, it first impacts the receiving plate. At this time, the receiving plate is subjected to force and moves downwards, which in turn drives the connecting ring downwards. The downward movement of the connecting ring presses against the buffer structure. Under the action of the buffer structure, the impact force is absorbed and eliminated. Therefore, this suspended buffer anti-fall device for inspection wells is simple to install, easy to maintain, has good buffering performance, and possesses a certain structural strength and high versatility.

[0022] In this invention, the connecting ring moves downward to compress the first return spring. The first return spring absorbs part of the force and contracts, while the other part of the force is transmitted to the inside of the piston. At this time, the piston moves downward under force, compressing the inert gas inside the hollow sleeve. The inert gas contracts under force, converting mechanical energy into heat energy, further increasing the buffering effect.

[0023] This invention uses a piston to move downwards, pushing the piston rod downwards, which in turn moves the connecting block downwards. The downward movement of the connecting block causes the friction block to squeeze and rub against the friction groove, absorbing the impact force again and thus stabilizing the buffering effect. At this time, the friction block moves backwards under force, pushing the second return spring to absorb energy and contract, thereby making the friction between the friction block and the friction groove rise smoothly until the impact force is completely absorbed, thus increasing its smoothness, completing a stable buffering and anti-fall, and increasing safety and comfort. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a diagram showing the positional relationship between the bearing ring and the lead screw in this invention.

[0026] Figure 3 This is an exploded view of the internal threaded ring and slide bar in this invention.

[0027] Figure 4 This is the present invention. Figure 3 Enlarged view of the structure at point A in the middle.

[0028] Figure 5 This is a schematic diagram of the structure of the bearing ring in this invention.

[0029] Figure 6 This is a schematic diagram of the connecting ring in this invention.

[0030] Figure 7 This is the present invention. Figure 6 Enlarged view of the structure at point B In the diagram, 101 is the bearing ring; 102 is the fixing frame; 103 is the limiting rod; 104 is the limiting plate; 105 is the limiting hole; 106 is the through groove; 107 is the through hole; 108 is the base; 109 is the friction groove; 110 is the hollow sleeve; 201 is the lead screw; 202 is the internal threaded ring; 203 is the annular groove; 204 is the rotating groove; 205 is the connecting frame; 206 is the sliding rod; 207 is the rotating frame; and 208 is the moving block. 209. Contact foot; 210. Rubber block; 220. Anti-slip groove; 230. Grounding rod; 240. Turntable; 301. Connecting ring; 302. Support plate; 303. Water channel; 304. Protective sleeve; 305. First positioning rod; 306. First return spring; 307. Piston; 308. Piston rod; 309. Connecting block; 310. Second positioning rod; 320. Second return spring; 330. Friction block. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] like Figures 1-7 As shown, this suspended buffer anti-fall device for inspection wells includes an inspection well, a load-bearing component, and a buffer anti-fall component. The load-bearing component includes a load-bearing ring 101 and a lead screw 201. Multiple bases 108 are fixedly provided at the top of the load-bearing ring 101, and hollow sleeves 110 are fixedly provided at the top of the bases 108 through connectors. A buffer structure is provided at the top of the hollow sleeve 110, and the buffer structure includes a first return spring 306. The buffer anti-fall assembly includes a connecting ring 301, a receiving plate 302 is fixed inside the connecting ring 301, the top ends of a plurality of first return springs 306 are fixed to the bottom end of the connecting ring 301, and a lead screw 201 passes through and extends to the top end of the receiving plate 302. The outer wall of the bearing ring 101 has multiple through holes 107, and the inner wall of the bearing ring 101 is fixed with multiple limiting plates 104. Limiting holes 105 are formed inside the limiting plates 104, and through grooves 106 are formed inside the limiting holes 105. The limiting holes 105 communicate with the through holes 107. An internal threaded ring 202 is threadedly connected to the outer wall of the lead screw 201. A rotating groove 204 is formed inside the internal threaded ring 202, and an annular groove 203 is formed on the outer wall of the rotating groove 204. Multiple slide rods 206 are rotatably connected internally. A connecting frame 205 is fixed on one side of the slide rod 206. The connecting frame 205 is slidably connected to the annular groove 203. A rotating frame 207 is rotatably connected to the other end of the connecting frame 205. A moving block 208 is rotatably connected to the other end of the rotating frame 207. An abutment foot 209 is fixed to the other end of the moving block 208. The abutment foot 209 is rubbed and fixed to the inner wall of the inspection well. The moving block 208 is slidably connected inside the limiting hole 105 and the through hole 107.

[0033] During installation, place the bearing ring 101 inside the inspection well, 10-20 cm away from the well opening. Then rotate the screw 201 to make the internal threaded ring 202 rotate and move downward along the screw 201. Then, with the cooperation of the annular groove 203 and the rotating groove 204, the sliding rod 206 and the connecting frame 205 move vertically downward. The downward movement of the connecting frame 205 pushes the rotating frame 207 to rotate and move downward, which in turn pushes the moving block 208 to move forward along the limiting hole 105 and the through hole 107, which in turn pushes the contact foot 209 to press and fix it to the inner wall of the inspection well, thus completing the suspension fixation. This method is suitable for inspection wells of different diameters. The same principle applies to maintenance and disassembly. When a person or object falls into the manhole, it first impacts the receiving plate 302. At this time, the receiving plate 302 moves downward under force, which in turn drives the connecting ring 301 to move downward. The downward movement of the connecting ring 301 compresses the buffer structure. Under the action of the buffer structure, the impact force is absorbed and eliminated. Thus, the suspended buffer anti-fall device for the manhole is simple to install, easy to maintain, has good buffering performance, has a certain structural strength, and is highly versatile.

[0034] A piston 307 is fixed at the bottom of the first reset spring 306, and a first positioning rod 305 is fixed at the top of the piston 307. The top of the first positioning rod 305 is fixed to the bottom of the connecting ring 301, and the piston 307 is slidably connected inside the hollow sleeve 110.

[0035] In this embodiment, the connecting ring 301 moves down to compress the first return spring 306. The first return spring 306 absorbs part of the force and contracts, while the other part of the force is transmitted to the piston 307. At this time, the piston 307 moves down under the force, and the first positioning rod 305 limits the contraction position of the first return spring 306 to prevent the first return spring 306 from twisting or deforming when it contracts, thereby increasing the service life of the first return spring 306.

[0036] The piston 307 has a piston rod 308 fixed at its bottom end, and the piston rod 308 is slidably connected to the inside of the hollow sleeve 110, and the inside of the hollow sleeve 110 is filled with inert gas.

[0037] In this embodiment, the piston 307 moves downward to compress the inert gas inside the hollow sleeve 110. At this time, the inert gas is compressed by the force and converts mechanical energy into heat energy, further increasing the buffering effect.

[0038] The base 108 has a friction groove 109 inside, and the cross-section of the friction groove 109 is trapezoidal. The bottom end of the piston rod 308 is fixed with a connecting block 309. The connecting block 309 is slidably connected with a second positioning rod 310 around its perimeter. The other end of the second positioning rod 310 is fixed with a friction block 330. A second return spring 320 is fixed between the friction block 330 and the connecting block 309.

[0039] In this embodiment, the piston 307 moves downward, pushing the piston rod 308 downward, which in turn drives the connecting block 309 downward. The downward movement of the connecting block 309 causes the friction block 330 to squeeze and rub against the friction groove 109, absorbing the impact force again and thus stabilizing the buffering effect. At this time, the friction block 330 moves backward under force, pushing the second return spring 320 to absorb energy and contract, thereby making the friction between the friction block 330 and the friction groove 109 rise smoothly until the impact force is completely absorbed, thus increasing its smoothness, completing a stable buffering and anti-fall, and increasing safety and comfort.

[0040] The cross-section of the receiving plate 302 is an isosceles right triangle, and multiple water passage grooves 303 are provided inside the receiving plate 302. A protective sleeve 304 is movably snapped onto the top of the receiving plate 302.

[0041] In this embodiment, the protective sleeve 304 is convenient for protecting the lead screw 201, and the water channel 303 is convenient for use with the receiving plate 302 to prevent water accumulation and siltation.

[0042] The receiving plate 302 is made of carbon fiber reinforced polyurethane composite material, and the protective sleeve 304 is made of carbon fiber reinforced polyurethane composite material.

[0043] In this embodiment, the carbon fiber reinforced polyurethane composite material has the characteristics of high strength and light weight, making it easy to install and disassemble.

[0044] A fixed frame 102 is fixedly provided at the bottom end of the bearing ring 101, and a limiting rod 103 is fixedly provided at the top end of the fixed frame 102. The bottom end of the lead screw 201 is rotatably connected to the limiting rod 103, and a turntable 240 is fixedly connected to the top end of the lead screw 201.

[0045] In this embodiment, the position of the lead screw 201 is limited by the cooperation of the fixing frame 102 and the limiting rod 103 to prevent the lead screw 201 from deviating when rotating, and the turntable 240 makes it convenient for the user to rotate the lead screw 201.

[0046] Multiple rubber blocks 210 are fixed on the side of the contact foot 209 near the inner wall of the inspection well, and multiple anti-slip grooves 220 are opened on the side of the contact foot 209 near the inner wall of the inspection well. Multiple grounding rods 230 are fixed inside the anti-slip grooves 220.

[0047] In this embodiment, the anti-slip groove 220, the grounding rod 230 and the rubber block 210 are used together to increase the surface friction of the contact foot 209, thereby further increasing the connection stability between the contact foot 209 and the inner wall of the inspection well.

[0048] Working principle of the invention: During installation, place the bearing ring 101 inside the inspection well, 10-20 cm away from the well opening. Then, rotate the screw 201 to make the internal threaded ring 202 rotate and move downward along the screw 201. Then, with the cooperation of the annular groove 203 and the rotating groove 204, the sliding rod 206 and the connecting frame 205 move vertically downward. The downward movement of the connecting frame 205 pushes the rotating frame 207 to rotate and move downward, which in turn pushes the moving block 208 to move forward along the limiting hole 105 and the through hole 107, which in turn pushes the contact foot 209 to press and fix it to the inner wall of the inspection well, thus completing the suspension fixation. This method is suitable for inspection wells of different diameters. The same principle applies to maintenance and disassembly. When a person or object falls into the inspection well, it first impacts the receiving plate 302. At this time, the receiving plate 302 moves downward under force, which in turn drives the connecting ring 301 to move downward. The downward movement of the connecting ring 301 compresses the first return spring 306. The first return spring 306 absorbs part of the force and contracts, while the other part of the force is transmitted to the piston 307. At this time, the piston 307 moves downward under force, which pushes the piston rod 308 to move downward, which in turn drives the connecting block 309 to move downward. The downward movement of the connecting block 309 causes the friction block 330 to squeeze and rub against the friction groove 109, absorbing the impact force again and thus stabilizing the buffering effect. At this time, the friction block 330 moves backward under force, pushing the second return spring 320 to absorb energy and contract, thereby making the friction between the friction block 330 and the friction groove 109 increase smoothly.

[0049] In summary, by setting up a suspended compression fixed bearing component with an adjustable fixing structure, and combining it with a multi-level smooth buffer anti-fall component, this inspection well suspended buffer anti-fall device is formed. It is simple to install, easy to maintain, has good buffering performance, has a certain structural strength, and is highly versatile.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A suspended buffer anti-fall device for inspection wells, comprising an inspection well, characterized in that, It also includes a load-bearing component and a buffer anti-fall component. The load-bearing component includes a load-bearing ring (101) and a lead screw (201). The top of the load-bearing ring (101) is fixed with a plurality of bases (108), and the top of the bases (108) is fixed with a hollow sleeve (110) through a connector. The top of the hollow sleeve (110) is provided with a buffer structure, and the buffer structure includes a first return spring (306). The buffer anti-fall assembly includes a connecting ring (301), a receiving plate (302) is fixed inside the connecting ring (301), the top ends of a plurality of first reset springs (306) are fixed to the bottom end of the connecting ring (301), and the lead screw (201) passes through and extends to the top end of the receiving plate (302); The outer wall of the bearing ring (101) is provided with multiple through holes (107), and the inner wall of the bearing ring (101) is fixed with multiple limiting plates (104). The limiting plates (104) are provided with limiting holes (105), and the limiting holes (105) are provided with through grooves (106). The limiting holes (105) communicate with the through holes (107). The outer wall of the lead screw (201) is threaded with an internal thread ring (202). The internal thread ring (202) is provided with a rotating groove (204), and the outer wall of the rotating groove (204) is provided with an annular groove (203). 04) Multiple sliding rods (206) are rotatably connected inside. A connecting frame (205) is fixed on one side of the sliding rod (206). The connecting frame (205) is slidably connected to the annular groove (203). A rotating frame (207) is rotatably connected to the other end of the connecting frame (205). A moving block (208) is rotatably connected to the other end of the rotating frame (207). A contact foot (209) is fixed to the other end of the moving block (208). The contact foot (209) is rubbed and fixed to the inner wall of the inspection well. The moving block (208) is slidably connected inside the limiting hole (105) and the through hole (107).

2. The suspended buffer anti-fall device for inspection wells according to claim 1, characterized in that, A piston (307) is fixed at the bottom end of the first reset spring (306), and a first positioning rod (305) is fixed at the top end of the piston (307). The top end of the first positioning rod (305) is fixed to the bottom end of the connecting ring (301), and the piston (307) is slidably connected to the inside of the hollow sleeve (110).

3. The suspended buffer anti-fall device for inspection wells according to claim 2, characterized in that, The piston (307) has a piston rod (308) fixed at its bottom end, and the piston rod (308) is slidably connected to the inside of the hollow sleeve (110), and the inside of the hollow sleeve (110) is filled with inert gas.

4. A suspended buffer anti-fall device for inspection wells according to claim 3, characterized in that, The base (108) has a friction groove (109) inside, and the cross-section of the friction groove (109) is trapezoidal. The bottom end of the piston rod (308) is fixed with a connecting block (309). The connecting block (309) is slidably connected with a second positioning rod (310) around its perimeter. The other end of the second positioning rod (310) is fixed with a friction block (330). A second return spring (320) is fixed between the friction block (330) and the connecting block (309).

5. A suspended buffer anti-fall device for inspection wells according to claim 1, characterized in that, The cross-section of the receiving plate (302) is an isosceles right triangle, and multiple water passage grooves (303) are provided inside the receiving plate (302). A protective sleeve (304) is movably snapped onto the top of the receiving plate (302).

6. A suspended buffer anti-fall device for inspection wells according to claim 5, characterized in that, The receiving plate (302) is made of carbon fiber reinforced polyurethane composite material, and the protective sleeve (304) is made of carbon fiber reinforced polyurethane composite material.

7. A suspended buffer anti-fall device for inspection wells according to claim 1, characterized in that, The bottom end of the bearing ring (101) is fixedly provided with a fixing frame (102), and the top end of the fixing frame (102) is fixedly provided with a limiting rod (103). The bottom end of the screw (201) is rotatably connected to the limiting rod (103), and the top end of the screw (201) is fixedly connected with a turntable (240).

8. A suspended buffer anti-fall device for inspection wells according to claim 1, characterized in that, The contact foot (209) has multiple rubber blocks (210) fixed on the side near the inner wall of the inspection well, and multiple anti-slip grooves (220) are opened on the side of the contact foot (209) near the inner wall of the inspection well. Multiple grounding rods (230) are fixed inside the anti-slip grooves (220).

Images