Anti-falling net structure of inspection well

Abstract

The invention relates to an inspection well anti-falling net structure and relates to the technical field of anti-falling nets, the inspection well anti-falling net structure comprises an anti-falling net, a plurality of fixing pieces and a plurality of bearing hooks, the fixing pieces are fixed to the inner side wall of an inspection well, and the bearing hooks and the fixing pieces are arranged in a one-to-one correspondence mode; the bearing hook comprises a connecting rod and a connecting hook, the connecting rod is horizontally arranged, one end of the connecting rod is connected with the connecting hook, the other end of the connecting rod is matched with the corresponding fixing piece in an inserted mode, and the connecting length between the fixing piece and the connecting rod is adjustable. The connecting hooks are arranged around the anti-falling net and connected with the anti-falling net in a hanging mode. According to the anti-falling net mounting structure, the fixing pieces are matched with the bearing hooks, so that the anti-falling nets of different sizes can be conveniently mounted, and after the anti-falling nets are mounted, the bearing hooks can tension the anti-falling nets, so that the mounting stability of the anti-falling nets can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of anti-fall nets, and in particular to an anti-fall net structure for an inspection well. Background Art

[0002] With the development of cities and the continuous improvement of municipal facilities, inspection wells have become an indispensable part of underground pipeline systems such as urban water supply, drainage, and communications. In order to ensure the normal operation of the underground pipeline system, it is necessary to conduct regular inspections and maintenance of the underground pipeline system, which requires the reasonable installation of inspection wells on the main pipelines, branch pipelines, and branch pipelines in the underground pipeline system.

[0003] Manhole covers are often installed on inspection wells to prevent pedestrians from falling into them. However, manhole covers do not always close the inspection wells. When the manhole covers are stolen or used for underground pipeline system maintenance or when the manhole covers are displaced in extreme weather, the corresponding inspection wells are in an open state, and pedestrians may be at risk of falling. Based on this problem, anti-fall nets are often pre-installed in existing inspection wells, which can protect pedestrians from falling when the inspection wells are open.

[0004] At present, the anti-fall net is mainly made of nylon fiber rope, fine steel wire and other materials, which has the characteristics of easy installation, low cost and wide application scenarios. When installing the anti-fall net, it is necessary to install several load-bearing hooks on the inner wall of the inspection well in advance, and then hang the anti-fall net hooks on the surrounding load-bearing hooks, and then the installation of the anti-fall net is realized.

[0005] With regard to the above-mentioned related technologies, when the size of the anti-fall net is large, after the anti-fall net hook is hung on the load-bearing hook, the connection between the load-bearing hook and the anti-fall net is relatively loose. At this time, the anti-fall net is easy to fall off from the corresponding load-bearing hook, which results in poor installation stability of the anti-fall net. Summary of the invention

[0006] The present application provides a manhole anti-fall net structure, the purpose of which is to improve the stability of the anti-fall net installation.

[0007] The anti-fall net structure for the inspection well provided in this application adopts the following technical solution: A fall prevention net structure for an inspection well comprises an anti-fall net, a plurality of fixing parts and a plurality of load-bearing hooks, wherein the plurality of fixing parts are fixed on the inner wall of the inspection well, and the load-bearing hooks are arranged in a one-to-one correspondence with the fixing parts; the load-bearing hooks comprise a connecting rod and a connecting hook, the connecting rod is arranged horizontally, one end of the connecting rod is connected to the connecting hook, and the other end is plugged into and matched with the corresponding fixing part, and the connection length between the fixing part and the connecting rod is adjustable; a plurality of connecting hooks are arranged around the anti-fall net, and the connecting hooks are hung with the anti-fall net.

[0008] By adopting the above technical solution, the anti-fall net, the fixing parts and the load-bearing hooks are arranged in coordination, so that the anti-fall net can be fixed in the inspection well, thereby satisfying the function of the anti-fall net.

[0009] In addition, the load-bearing hook is connected to the fixing piece through a connecting rod, and the connection length between the connecting rod and the fixing piece can be adjusted. Therefore, when installing the anti-fall net, the connection length between the connecting rod and the fixing piece can be shortened. At this time, the connecting hook will move toward the inside of the inspection well, which is convenient for the installation of the anti-fall net; after the anti-fall net is installed, the connection length between the connecting rod and the fixing piece is lengthened. At this time, the connecting hook will move toward the direction of the corresponding fixing piece, and the load-bearing hook will tighten the anti-fall net.

[0010] The cooperation between the fixing parts and the load-bearing hooks facilitates the installation of anti-fall nets of different sizes, and after the anti-fall net is installed, the load-bearing hooks can tighten the anti-fall net, thereby improving the stability of the anti-fall net installation.

[0011] Optionally, the fixing member is threadedly connected to the connecting rod.

[0012] By adopting the above technical solution, the fixing member and the connecting rod are connected by threads, and the connection length between the fixing member and the connecting rod can be adjusted by twisting the connecting rod, which meets the connection requirements between the fixing member and the load-bearing hook.

[0013] Optionally, the connecting rod is slidably connected to the fixing member along its own axial direction.

[0014] By adopting the above technical solution, the fixing member and the connecting rod are connected by sliding, and the connection length between the fixing member and the connecting rod can be adjusted by pushing and pulling the connecting rod along its own axial direction, which meets the connection requirements between the fixing member and the load-bearing hook.

[0015] Optionally, a tension spring is provided on the fixing member, and the length direction of the tension spring is arranged along the axial direction of the connecting rod. One end of the tension spring is connected to the connecting rod, and the other end is connected to the fixing member.

[0016] By adopting the above technical solution and setting the tension spring, when installing the anti-fall net, pull the load-bearing hook, the connecting rod slides on the corresponding fixing piece, the tension spring is compressed, and the load-bearing hook moves toward the middle of the inspection well, which makes it easier for the anti-fall net to be hung on the load-bearing hook; after the anti-fall net is hung with the corresponding load-bearing hook, release the load-bearing hook, and under the action of the tension spring, the load-bearing hook automatically resets, and at this time the load-bearing hook tightens the anti-fall net to achieve reinforcement of the anti-fall net. Therefore, the setting of the tension spring makes it easier for the weighing hook to automatically tighten the anti-fall net.

[0017] Optionally, a connecting hole is provided on the fixing part, the connecting rod is plugged into the connecting hole, and the connecting rod is slidably connected to the inner wall of the connecting hole along its own axial direction; a sliding ring groove is provided on the inner wall of the connecting hole, the sliding ring groove is coaxially arranged with the connecting hole, a reinforcement slip ring is sleeved on the connecting rod, the reinforcement slip ring is plugged into the sliding ring groove, and the reinforcement slip ring is slidably connected to the inner wall of the sliding ring groove along its own axial direction.

[0018] By adopting the above technical solution, the connection hole is opened to realize the sliding connection between the fixing member and the connecting rod. The matching arrangement of the reinforcing slip ring and the sliding ring groove can improve the sliding stability between the connecting rod and the fixing member on the one hand, and prevent the connecting rod from slipping out of the connection hole on the other hand.

[0019] Optionally, the tension spring is located in the sliding ring groove, the tension spring is sleeved on the outside of the connecting rod, one end of the tension spring is connected to the reinforcement sliding ring, and the other end is connected to the axial inner wall of the sliding ring groove.

[0020] By adopting the above technical solution, since the tension spring is sleeved on the outside of the connecting rod, the stability of the elastic force applied by the tension spring on the connecting rod can be improved, thereby improving the stability of the movement of the connecting rod. In addition, the tension spring is located in the sliding ring groove, which can reduce the impact of the environment on the tension spring and increase the service life of the tension spring.

[0021] Optionally, a locking mechanism is provided on the fixing member, and the locking mechanism includes a locking block and a resistance spring. A locking groove is provided on the inner side wall of the connecting hole, and the depth direction of the locking groove is arranged along the radial direction corresponding to the connecting hole. The locking block is plugged into and matched with the locking groove, and the locking block is slidingly connected to the inner side wall of the locking groove along the depth direction of the locking groove; the resistance spring is located in the locking groove, and the length direction of the resistance spring is arranged along the depth direction of the locking groove, one end of the resistance spring is connected to the locking block, and the other end is connected to the bottom of the groove of the locking groove; a slot is provided on the outer side wall of the connecting rod, and when the slot is connected to the slot, the locking block is plugged into and matched with the slot.

[0022] By adopting the above technical solution, the locking mechanism is arranged through the cooperation of the locking block and the resistance spring. The resistance spring will drive the locking block to resist the outer wall of the connecting rod. During the axial sliding process of the connecting rod, the locking groove can be connected with the corresponding slot. The locking block is automatically inserted into the slot under the action of the resistance spring, which can achieve the locking of the connecting rod position and increase the stability of the connection between the connecting rod and the fixing part.

[0023] After the load-bearing hook is hooked with the anti-fall net, the spring is tightened so that the load-bearing hook automatically tightens the anti-fall net. At this time, if the anti-fall net needs to be further tightened, the load-bearing hook is pushed further away from the anti-fall net. At this time, after the load-bearing hook continues to move for a distance, the slot is connected with the card slot, and the card block is plugged into the slot to achieve locking of the load-bearing hook, which can increase the stability of the fixation of the load-bearing hook and the stability of the fixation of the anti-fall net.

[0024] Optionally, an unlocking mechanism is provided on the fixing member, the unlocking mechanism is connected to the clamping block, and the unlocking mechanism is used to drive the clamping block to move in a direction away from the connecting rod along the depth direction of the clamping slot.

[0025] By adopting the above technical solution and setting the unlocking mechanism, when the unlocking mechanism drives the card block to move in the direction of the resisting spring, the card block can be pulled out of the corresponding slot, thereby releasing the locking mechanism from locking the connecting rod.

[0026] Optionally, a limiting tube is provided on the fixing member, and the limiting tube is detachably connected to the fixing member; the limiting tube is sleeved on the outside of the connecting rod, the connecting hook is located in the limiting tube, and the limiting tube closes the opening of the connecting hook.

[0027] By adopting the above technical solution, the limiting tube and the fixing part can be detachably connected, so after the anti-fall net is hung with the corresponding connecting hook, the limiting tube is installed on the corresponding fixing part, which can close the opening of the connecting hook, and then can effectively prevent the anti-fall net from detaching from the opening of the connecting hook, thereby improving the stability of the connection between the load-bearing hook and the anti-fall net.

[0028] Optionally, the limiting tube is sleeved on the fixing member, and the limiting tube is threadedly connected to the fixing member.

[0029] By adopting the above technical solution, the limiting tube and the fixing piece are connected by threads, which makes it possible for the limiting tube to adjust the length of the limiting tube extending out of the fixing piece along its own axial direction, so that the limiting tube can be adjusted to close the opening of the connecting hook, and also enables the limiting tube to release the closure of the connecting hook, thereby facilitating the disassembly and installation of the load-bearing hook and the anti-fall net.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cooperation between the fixing parts of the present application and the load-bearing hook facilitates the installation of anti-fall nets of different sizes, and after the anti-fall net is installed, the load-bearing hook can tighten the anti-fall net, thereby improving the stability of the anti-fall net installation.

[0031] 2. The present application provides a locking mechanism, which can lock the load-bearing hook after the anti-fall net is installed, thereby increasing the stability of the load-bearing hook fixation and at the same time increasing the stability of the anti-fall net fixation.

[0032] 3. The present application can close the opening of the connecting hook by setting a limiting tube, thereby effectively preventing the anti-fall net from detaching from the opening of the connecting hook, thereby improving the stability of the connection between the load-bearing hook and the anti-fall net. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the inspection well anti-fall net structure of Example 1 of the present application.

[0034] Figure 2 It is a schematic cross-sectional structure diagram of the anti-fall net structure of the inspection well in Example 1 of the present application.

[0035] Figure 3 It is a schematic diagram of the overall structure of the fixing part of Example 2 of the present application.

[0036] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixing part of Example 2 of the present application.

[0037] Figure 5 yes Figure 4 Schematic diagram of the local enlarged structure of part A.

[0038] Figure 6 It is a schematic diagram of the overall structure of the card block of Example 2 of the present application.

[0039] In the figure, 1. anti-fall net; 2. fixing piece; 21. expansion bolt; 22. fixing shaft; 221. connecting hole; 222. sliding ring groove; 3. load-bearing hook; 31. connecting rod; 311. reinforcement sliding ring; 32. connecting hook; 4. tensioning spring; 5. locking mechanism; 51. clamping block; 511. reset groove; 512. first inclined surface; 52. clamping groove; 53. resistance spring; 54. slot; 6. unlocking mechanism; 61. unlocking rod; 62. unlocking hole; 63. second inclined surface; 7. triggering mechanism; 71. triggering ring; 72. mounting ring groove; 73. retaining spring; 8. limiting tube; 100. inspection well. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0041] Example 1: A manhole anti-fall net structure, refer to Figure 1 and Figure 2, including an anti-fall net 1, a plurality of fixing parts 2 and a plurality of load-bearing hooks 3, the plurality of fixing parts 2 are all fixed on the inner wall of the inspection well 100, the plurality of fixing parts 2 are located on the same horizontal plane, and the plurality of fixing parts 2 are arranged around the anti-fall net 1, the load-bearing hooks 3 are arranged correspondingly to the fixing parts 2, the load-bearing hooks 3 are connected to the corresponding fixing parts 2, and the anti-fall net 1 is hung with the load-bearing hooks 3.

[0042] In this embodiment, refer to Figure 1 and Figure 2 The fixing member 2 includes an expansion bolt 21, and the expansion bolt 21 is fixed to the inner wall of the inspection well 100 in the horizontal direction. The load-bearing hook 3 includes a connecting rod 31 and a connecting hook 32. The connecting rod 31 is horizontally arranged, and the connecting rod 31 is located between the corresponding expansion bolt 21 and the anti-fall net 1 along its own axial direction. One end of the connecting rod 31 is plug-fitted with the corresponding expansion bolt 21, and the connecting rod 31 is connected to the expansion bolt 21 by a thread, and the end of the connecting rod 31 away from the expansion bolt 21 is connected to the connecting hook 32, and the connecting hook 32 is hung with the anti-fall net 1.

[0043] In this embodiment, in addition to using the expansion bolt 21 to directly connect with the connecting rod 31 through a thread, in order to ensure the connection stability of the load-bearing hook 3, the expansion bolt 21 can also be used to fix the threaded seat to the inner wall of the inspection well 100, and then realize the threaded connection with the connecting rod 31 through the threaded seat.

[0044] In this embodiment, the load-bearing hook 3 is made of 304 stainless steel, the closing degree of the connecting hook 32 is 330 degrees, and the overall length of the load-bearing hook 3 is 100 mm.

[0045] In this embodiment, the expansion bolts 21 are 25 cm away from the manhole cover along the depth direction of the inspection well 100. The number of the expansion bolts 21 is not less than 8.

[0046] In this embodiment, the net rope of the anti-fall net 1 is supported by high-strength polyethylene or nylon material, the diameter of the net rope of the anti-fall net 1 is 8mm, and the net rope of the anti-fall net 1 is supported by at least three strands of single ropes, and the tension of each strand of single rope is greater than 1600N. The diameter of the anti-fall net 1 is 600mm to 800mm, the mesh length of the anti-fall net 1 is not more than 10cm, the weighing capacity is not less than 300kg, and the breaking strength of the anti-fall net 1 is not less than 3000N, and the impact resistance is not less than 500J.

[0047] Reference Figure 1 and Figure 2, the connection rod 31 and the fixing member 2 are matched and arranged, and the connection rod 31 is screwed, and the connection length between the connection rod 31 and the corresponding fixing member 2 can be adjusted through the threaded connection between the connection rod 31 and the fixing member 2. Therefore, when installing the anti-falling net 1, the connection length between the connection rod 31 and the corresponding fixing member 2 is shortened by screwing the connection rod 31, which facilitates the installation of the anti-falling net 1; after the anti-falling net 1 is installed, the connection length between the connection rod 31 and the corresponding fixing member 2 is lengthened by screwing the connection rod 31, and the load-bearing hook 3 can tighten the anti-falling net 1, thereby increasing the stability of the fixing of the anti-falling net 1.

[0048] The implementation principle of the embodiment of the present application is: the setting of the fixing member 2, the load-bearing hook 3 and the anti-fall net 1 can install the anti-fall net 1 in the inspection well 100.

[0049] During the installation of the anti-fall net 1, the load-bearing hook 3 is first loosened. At this time, the connection length between the connecting rod 31 and the corresponding fixing piece 2 becomes shorter, which facilitates the hanging of the anti-fall net 1 and the connecting hook 32; after the anti-fall net 1 is installed, the load-bearing hook 3 is tightened. At this time, the connection length between the connecting rod 31 and the corresponding fixing piece 2 becomes longer. During this process, the load-bearing hook 3 will tighten the anti-fall net 1, thereby improving the stability of the installation of the anti-fall net 1.

[0050] Example 2: A manhole anti-fall net structure, refer to Figure 1 and Figure 3 The difference between this embodiment and embodiment 1 is that the fixing member 2 includes a fixing shaft 22 , one end of the fixing shaft 22 is fixed to the inner wall of the inspection well 100 , and the other end is connected to the load-bearing hook 3 .

[0051] Reference Figure 3 and Figure 4 A connecting hole 221 is provided at one end of the fixed shaft 22, and the connecting hole 221 is coaxially arranged with the fixed shaft 22. The connecting rod 31 is plugged into the connecting hole 221, and the connecting rod 31 is slidably connected with the corresponding inner wall of the connecting hole 221 along its own axial direction. The opening of the connecting hole 221 realizes the sliding connection between the connecting rod 31 and the fixing member 2, and further the connection length between the connecting rod 31 and the fixing member 2 can be adjusted.

[0052] Reference Figure 4A sliding ring groove 222 is provided on the inner wall of the connecting hole 221, and the sliding ring groove 222 is coaxially arranged with the connecting hole 221. A reinforcing slip ring 311 is sleeved on the outer side of the connecting rod 31, and the reinforcing slip ring 311 is coaxially arranged with the connecting rod 31 and fixedly connected. The reinforcing slip ring 311 is plug-fitted with the sliding ring groove 222, and the reinforcing slip ring 311 is slidably connected with the inner wall of the sliding ring groove 222 along its own axis. The cooperation between the sliding ring groove 222 and the reinforcing slip ring 311 improves the sliding stability between the connecting rod 31 and the fixing member 2, and can prevent the connecting rod 31 from slipping out of the connecting hole 221.

[0053] Reference Figure 4 A tensioning spring 4 is sleeved on the outside of the connecting rod 31, and the tensioning spring 4 is located in the sliding ring groove 222. The tensioning spring 4 is located on the side of the reinforcement slip ring 311 facing the connecting hook 32 along the axial direction of the connecting rod 31, and one end of the tensioning spring 4 is connected to the reinforcement slip ring 311, and the other end is connected to the axial inner wall of the sliding ring groove 222.

[0054] Reference Figure 3 and Figure 4 When installing the anti-fall net 1, pull the load-bearing hook 3, the connecting rod 31 slides on the corresponding fixing piece 2, the tensioning spring 4 is compressed, and the load-bearing hook 3 moves toward the middle of the inspection well 100, which makes it easy for the anti-fall net 1 to be hung on the load-bearing hook 3; after the anti-fall net 1 is hung with the corresponding load-bearing hook 3, release the load-bearing hook 3, and under the action of the tensioning spring 4, the load-bearing hook 3 automatically resets. At this time, the load-bearing hook 3 tightens the anti-fall net 1 to reinforce the anti-fall net 1.

[0055] Reference Figure 4 and Figure 5 A locking mechanism 5 is arranged between the fixed shaft 22 and the corresponding load-bearing hook 3, and the locking mechanism 5 includes a locking block 51. A locking groove 52 is opened on the inner wall of the connecting hole 221. The depth direction of the locking groove 52 is arranged along the radial direction corresponding to the connecting hole 221, and the length direction of the locking block 51 is arranged along the depth direction of the locking groove 52. The locking block 51 is plugged into the locking groove 52, and the locking block 51 is slidably connected with the inner wall of the locking groove 52 along its own length direction.

[0056] Reference Figure 5 The locking mechanism 5 also includes a resistance spring 53, which is located in the locking groove 52, and the resistance spring 53 is located on the side of the block 51 away from the connecting rod 31, and the length direction of the resistance spring 53 is arranged along the length direction of the block 51, one end of the resistance spring 53 is connected to the block 51, and the other end is connected to the bottom of the slot 52, and the side of the block 51 away from the resistance spring 53 is in resistance with the outer wall of the connecting rod 31.

[0057] Reference Figure 5The outer wall of the connecting rod 31 is provided with a slot 54. When the connecting rod 31 moves along its own axial direction, when the slot 54 is directly opposite to the card slot 52, the slot 54 is connected with the card slot 52, and one end of the card block 51 is plugged into the slot 54.

[0058] Reference Figure 4 and Figure 5 After the load-bearing hook 3 is hooked with the anti-falling net 1, the spring 4 is tightened so that the load-bearing hook 3 automatically tightens the anti-falling net 1. At this time, if the anti-falling net 1 needs to be further tightened, the load-bearing hook 3 is pushed in the direction away from the anti-falling net 1. At this time, after the load-bearing hook 3 continues to move for a distance, the slot 54 is connected with the card slot 52, and the card block 51 is plugged and matched with the slot 54 to achieve the locking of the load-bearing hook 3. At this time, the stability of the fixing of the load-bearing hook 3 can be increased, and the stability of the fixing of the anti-falling net 1 can also be increased.

[0059] In this embodiment, refer to Figure 4 There are several locking mechanisms 5, and the several locking mechanisms 5 are arranged in sequence along the circumference of the connecting rod 31. The cooperation of the several locking mechanisms 5 can further improve the stability of the locking of the load-bearing hook 3 and the fixing member 2.

[0060] Reference Figure 4 and Figure 5 An unlocking mechanism 6 is also provided on the fixed shaft 22 . In the present embodiment, a plurality of unlocking mechanisms 6 are provided, and the unlocking mechanisms 6 and the locking mechanisms 5 are provided in a one-to-one correspondence.

[0061] Reference Figure 4 and Figure 5 The unlocking mechanism 6 includes an unlocking rod 61, and an unlocking hole 62 is opened on the side of the fixed shaft 22 facing the anti-fall net 1. The axis of the unlocking hole 62 is arranged along the axis of the fixed shaft 22. One end of the unlocking hole 62 is connected with the card slot 52. The unlocking rod 61 is plugged into the unlocking hole 62, and the unlocking rod 61 is slidably connected to the inner wall of the unlocking hole 62 along its own axis.

[0062] Reference Figure 5 and Figure 6 A reset groove 511 is provided on the side wall of the block 51, and the reset groove 511 is connected to the unlocking hole 62. A first inclined surface 512 is provided at the bottom of the reset groove 511, and a second inclined surface 63 is provided on the side of the unlocking rod 61 facing the block 51. The first inclined surface 512 is inclined along the length direction of the block 51 and is close to the connecting rod 31 and is arranged in a direction away from the connecting hook 32. One end of the unlocking rod 61 is plugged into the reset groove 511, and the unlocking rod 61 is slidably connected to the inner side wall of the reset groove 511, and the first inclined surface 512 is in contact with the second inclined surface 63.

[0063] Reference Figure 5 and Figure 6When the unlocking rod 61 moves along its own axial direction toward the block 51, the second inclined surface 63 abuts against the first inclined surface 512. Under the cooperation of the first inclined surface 512 and the second inclined surface 63, the block 51 moves along its own length direction in a direction away from the connecting rod 31. Therefore, after the block 51 is inserted into the slot 54, the unlocking rod 61 can be driven to move, so that the block 51 can be driven to be withdrawn from the corresponding slot 54, and then the locking mechanism 5 on the connecting rod 31 can be released.

[0064] Reference Figure 4 and Figure 5 , a trigger mechanism 7 is also provided on the fixed shaft 22, and the trigger mechanism 7 includes a trigger ring 71. A mounting ring groove 72 is provided on the side of the fixed shaft 22 facing the connecting hook 32. The mounting ring groove 72 is coaxially arranged with the fixed shaft 22, and a plurality of unlocking holes 62 are provided at the bottom of the mounting ring groove 72. The trigger ring 71 is plug-fitted with the mounting ring groove 72, and the trigger ring 71 is slidably connected with the inner side wall of the mounting ring groove 72 along its own axial direction. One end of a plurality of unlocking rods 61 is connected to the trigger ring 71. When the trigger ring 71 is pushed to move in the mounting ring groove 72, the unlocking rod 61 can be driven to move, thereby realizing the unlocking of a plurality of stuck mechanisms 5.

[0065] Reference Figure 4 and Figure 5 The trigger mechanism 7 further includes a plurality of retaining springs 73, which are arranged one by one with the unlocking rods 61, and are sleeved on the outside of the corresponding unlocking rods 61. The retaining springs 73 are located in the mounting ring groove 72, and one end of the retaining spring 73 is connected to the trigger ring 71, and the other end is connected to the bottom of the mounting ring groove 72. With the cooperation of the plurality of retaining springs 73, under normal circumstances, the trigger ring 71 can protrude from the end surface of the fixed shaft 22, which makes it easy to drive the trigger ring 71 to move and realize the unlocking of the plurality of stuck mechanisms 5.

[0066] Reference Figure 3 and Figure 4 The fixing member 2 further includes a limiting tube 8, which is coaxially arranged with the fixed shaft 22, and one end of the limiting tube 8 is sleeved outside the fixed shaft 22, and the other end extends toward the anti-fall net 1, and the limiting tube 8 is connected to the fixed shaft 22 by threads. The limiting tube 8 is coaxially arranged with the connecting rod 31, and the connecting hook 32 is located in the corresponding limiting tube 8, and the limiting tube 8 closes the opening of the corresponding connecting hook 32.

[0067] Reference Figure 3 and Figure 4After the connecting hook 32 is hung with the anti-fall net 1, the limiting tube 8 is turned to adjust the length of the limiting tube 8 extending out of the corresponding fixed shaft 22, so that the corresponding connecting hook 32 is located in the limiting tube 8, and then the limiting tube 8 closes the opening of the connecting hook 32, which can prevent the anti-fall net 1 from detaching from the opening of the connecting hook 32, so this can effectively increase the stability of the load-bearing hook 3 hanging on the anti-fall net 1.

[0068] The implementation principle of the embodiment of the present application is: when installing the anti-fall net 1, the anti-fall net 1 is sequentially hooked with a plurality of load-bearing hooks 3. Since the load-bearing hooks 3 can slide toward the direction of the anti-fall net 1, this facilitates the installation of the anti-fall net 1.

[0069] After the anti-fall net 1 is installed, each load-bearing hook 3 is automatically reset under the action of the corresponding tensioning spring 4, which can tighten the anti-fall net 1 and improve the stability of the connection between the anti-fall net 1 and the load-bearing hook 3.

[0070] If the anti-fall net 1 is still not installed tightly enough, the corresponding load-bearing hook 3 is pushed toward the fixing member 2. After the load-bearing hook 3 moves a certain distance, the locking mechanisms 5 will lock the load-bearing hook 3, which enables the load-bearing hook 3 to further tighten the anti-fall net 1, thereby further improving the stability of the connection between the anti-fall net 1 and the load-bearing hook 3. After that, the limiting tube 8 is installed so that the limiting tube 8 closes the corresponding load-bearing hook 3, which can effectively prevent the anti-fall net 1 from being separated from the load-bearing hook 3.

[0071] When the anti-fall net 1 needs to be replaced or disassembled, the limit tube 8 is rotated to open, the trigger ring 71 is pressed, and the several locking mechanisms 5 are automatically unlocked. The tensioning spring 4 drives the load-bearing hook 3 to automatically reset in the direction of the anti-fall net 1. At this time, the anti-fall net 1 can be easily removed by pulling the load-bearing hook 3.

[0072] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A manhole anti-fall net structure, characterized in that: include: An anti-fall net (1), a plurality of fixing members (2) and a plurality of load-bearing hooks (3), wherein the plurality of fixing members (2) are all fixed on the inner wall of the inspection well (100), and the load-bearing hooks (3) are arranged in a one-to-one correspondence with the fixing members (2); The load-bearing hook (3) comprises a connecting rod (31) and a connecting hook (32); the connecting rod (31) is arranged horizontally; one end of the connecting rod (31) is connected to the connecting hook (32); the other end of the connecting rod (31) is plugged into and matched with the corresponding fixing member (2); and the connection length between the fixing member (2) and the connecting rod (31) is adjustable; A plurality of connecting hooks (32) are arranged around the anti-falling net (1), and the connecting hooks (32) are hooked to the anti-falling net (1).

2. The anti-fall net structure for inspection well according to claim 1 is characterized in that: The fixing member (2) is threadedly connected to the connecting rod (31).

3. The anti-fall net structure for inspection well according to claim 1 is characterized in that: The connecting rod (31) is slidably connected to the fixing member (2) along its own axial direction.

4. The anti-fall net structure for inspection well according to claim 3 is characterized in that: The fixing member (2) is provided with a tension spring (4), the length direction of the tension spring (4) being arranged along the axial direction of the connecting rod (31), one end of the tension spring (4) being connected to the connecting rod (31), and the other end being connected to the fixing member (2).

5. The anti-fall net structure for inspection well according to claim 4 is characterized in that: The fixing member (2) is provided with a connecting hole (221), the connecting rod (31) is plugged into and matched with the connecting hole (221), and the connecting rod (31) is slidably connected to the inner wall of the connecting hole (221) along its own axial direction; The inner wall of the connecting hole (221) is provided with a sliding ring groove (222), the sliding ring groove (222) being coaxially arranged with the connecting hole (221), the connecting rod (31) being sleeved with a reinforcing slip ring (311), the reinforcing slip ring (311) being plug-fitted with the sliding ring groove (222), and the reinforcing slip ring (311) being slidably connected with the inner wall of the sliding ring groove (222) along its own axial direction.

6. The anti-fall net structure for inspection well according to claim 5 is characterized in that: The tension spring (4) is located in the sliding ring groove (222), and the tension spring (4) is sleeved on the outside of the connecting rod (31). One end of the tension spring (4) is connected to the reinforcement sliding ring (311), and the other end is connected to the axial inner wall of the sliding ring groove (222).

7. The anti-fall net structure for inspection well according to claim 5 is characterized in that: The fixing member (2) is provided with a locking mechanism (5), the locking mechanism (5) comprising a locking block (51) and a resisting spring (53); the inner side wall of the connecting hole (221) is provided with a locking groove (52); the depth direction of the locking groove (52) is arranged along the radial direction corresponding to the connecting hole (221); the locking block (51) is plug-fitted with the locking groove (52); the locking block (51) is slidably connected with the inner side wall of the locking groove (52) along the depth direction of the locking groove (52); The resisting spring (53) is located in the clamping slot (52), the length direction of the resisting spring (53) is arranged along the depth direction of the clamping slot (52), one end of the resisting spring (53) is connected to the clamping block (51), and the other end is connected to the bottom of the clamping slot (52); A slot (54) is provided on the outer side wall of the connecting rod (31); when the slot (54) is connected to the clamping slot (52), the clamping block (51) is plugged into and matched with the slot (54).

8. The anti-fall net structure for inspection well according to claim 7 is characterized in that: An unlocking mechanism (6) is provided on the fixing member (2), the unlocking mechanism (6) is connected to the clamping block (51), and the unlocking mechanism (6) is used to drive the clamping block (51) to move in a direction away from the connecting rod (31) along the depth direction of the clamping slot (52).

9. The anti-fall net structure for inspection well according to claim 1 is characterized in that: A limiting tube (8) is provided on the fixing member (2), and the limiting tube (8) is detachably connected to the fixing member (2); the limiting tube (8) is sleeved on the outside of the connecting rod (31), the connecting hook (32) is located in the limiting tube (8), and the limiting tube (8) closes the opening of the connecting hook (32).

10. The anti-fall net structure for inspection well according to claim 9, characterized in that: The limiting tube (8) is sleeved on the fixing member (2), and the limiting tube (8) is threadedly connected to the fixing member (2).

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