Fixing device for anti-falling net of inspection well

Abstract

The utility model relates to the technical field of municipal engineering, and discloses an inspection well anti-falling net fixing device which comprises a main body, an anti-skid ring is fixedly installed on one side of the main body, a plurality of installation holes used for installation are formed in the main body in a penetrating mode, and hooks used for hanging a net are further fixedly installed on the main body. The supporting assembly is detachably connected with the main body and used for expanding the main body to abut against the inner wall of the inspection well, the anti-falling net can be installed by hooking the anti-falling net through a plurality of hooks on the inner wall of the main body, and the installation main body can be installed and fixed to the inner wall of the inspection well in the mode that expansion bolts penetrate through the installation holes. The main body formed by strip-shaped bending can adapt to the diameter of a circular inspection well within a certain range, so that the mounting adaptability is improved, the antiskid ring made of rubber is matched with a plurality of deformation grooves, when the main body is fixed to the inner wall of the inspection well, the antiskid ring is extruded and forms good adhesive force with the inner wall of the inspection well, and the service life of the inspection well is prolonged. The multiple deformation grooves can improve the deformation amplitude of the anti-skid ring to adapt to concave-convex of the inner wall of the inspection well.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering technology, and in particular to a manhole anti-fall net fixing device. Background Technology

[0002] Drainage is part of municipal engineering. As the entrance to the underground drainage network, manholes need to be equipped with fall protection devices to reduce the risk of people falling into manholes due to lost manhole covers.

[0003] A search revealed a prior art disclosure of a municipal manhole anti-fall structure (publication number: CN112962673B), which relates to a manhole that reduces the safety hazards posed by a lost manhole cover. The structure includes a manhole base and a manhole cover. The manhole base has a circular ring structure, and its inner wall has a stepped groove circumferentially provided for manhole cover installation. An anti-fall mechanism is installed in the manhole base, comprising a disc-shaped load-bearing plate and a support ring seat located around the load-bearing plate for fixed connection. The load-bearing plate has evenly distributed water-permeable holes.

[0004] Existing technology mainly uses a circular ring structure on which a fall-prevention net is installed. Manholes are mainly constructed of building materials such as red bricks or cast in concrete, and their overall structure is a cylinder. However, the inner wall is not a regular circumference. Using a circular ring for installation makes it difficult to ensure that the outer wall of the ring fits snugly against the inner wall of the manhole, resulting in an uneven installation position. At the same time, the diameter of the ring is fixed, making it difficult to install on manholes with diameter deviations. The installation adaptability is poor, leaving room for optimization.

[0005] Therefore, we propose a manhole safety net fixing device. Utility Model Content

[0006] The present invention mainly addresses the technical problem of poor adaptability of the above-mentioned installation and provides a manhole anti-fall net fixing device.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a manhole anti-fall net fixing device, comprising:

[0008] The main body forms an open ring structure. An anti-slip ring is fixedly installed on one side of the main body. The main body has several mounting holes for installation. The main body is also fixedly installed with hooks for hanging nets.

[0009] The support component is detachably connected to the main body and is used to prop the main body open to contact the inner wall of the manhole.

[0010] In a preferred embodiment of this utility model, the main body is formed by bending a rectangular metal strip into a C-shaped annular structure, and the anti-slip ring is fixedly installed on the outer circumference of the main body.

[0011] In a preferred embodiment of this utility model, the anti-slip ring is provided with a plurality of deformation grooves, which are quadrilateral grooves that extend obliquely from the top to the bottom of the anti-slip ring.

[0012] In a preferred embodiment of this utility model, a plurality of mounting holes are equidistantly provided on the inner circumferential surface of the main body, and the mounting holes penetrate the main body.

[0013] In a preferred embodiment of this utility model, the hook is fixedly installed on the inner circumferential surface of the main body, the hook is integrally formed with the main body, and the hook forms a bent rod.

[0014] In a preferred embodiment of this utility model, the support assembly includes an internal threaded sleeve and a threaded rod, wherein the threaded rod is threadedly connected to the internal threaded sleeve, and the inner wall of the main body is provided with an anti-disengagement groove for limiting the internal threaded sleeve.

[0015] As a preferred embodiment of this utility model, at least two sets of anti-detachment grooves are provided on the inner wall of the main body. The two anti-detachment grooves in the same set are used to limit the ends of the internal threaded sleeve and the threaded rod, respectively. The two sets of anti-detachment grooves are staggered and close to the upper and lower end faces of the main body.

[0016] This utility model provides a manhole safety net fixing device. It has the following beneficial effects:

[0017] 1. This manhole fall prevention net fixing device allows for the installation of the fall prevention net by hooking it with multiple hooks on the inner wall of the main body. The main body can be fixed to the inner wall of the manhole by using expansion bolts passing through the mounting holes. The main body, formed by a strip-shaped bend, can adapt to the diameter of a circular manhole within a certain range, thereby improving the adaptability of the installation. With the use of rubber anti-slip rings and multiple deformation grooves, when the main body is fixed to the inner wall of the manhole, the anti-slip rings are compressed and form good adhesion with the inner wall of the manhole. The multiple deformation grooves can increase the deformation range of the anti-slip rings to adapt to the unevenness of the inner wall of the manhole, thus improving the adaptability of the installation.

[0018] 2. This manhole anti-fall net fixing device forms an adjustable-length support rod by rotating an internal threaded sleeve and a threaded rod. The two ends of the support rod are inserted into two anti-detachment grooves in the same group. The anti-detachment grooves push the main body, causing the anti-slip ring to contact the inner wall of the manhole, thus installing the main body. Taking a 90-degree angle between the two sets of anti-detachment grooves as an example, one support rod is installed in each of the two sets of anti-detachment grooves. The two support rods are distributed at a 90-degree angle, thus ensuring that the main body has at least four stress points. The internal threaded sleeve, in conjunction with the deformable anti-slip ring, supports and limits the main body, making the installation method more flexible and adaptable without sacrificing load-bearing capacity. Attached Figure Description

[0019] Figure 1 This is a perspective view of the entire utility model;

[0020] Figure 2 This is a schematic diagram showing the installation of hooks and anti-slip rings on the main body of this utility model;

[0021] Figure 3 This is a perspective view of the support component of this utility model;

[0022] Figure 4 This is a three-dimensional view of the anti-slip ring of this utility model;

[0023] Figure 5 This is a three-dimensional view of the main body of this utility model.

[0024] Legend: 10. Main body; 11. Hook; 12. Mounting hole; 13. Anti-slip ring; 14. Deformation groove; 15. Anti-detachment groove; 20. Internal threaded sleeve; 21. Threaded rod. Detailed Implementation

[0025] A manhole safety net fixing device, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, it includes:

[0026] The main body 10 forms an open annular structure. An anti-slip ring 13 is fixedly installed on one side of the main body 10. The main body 10 has several mounting holes 12 for installation. The main body 10 also has hooks 11 for hanging nets. The main body 10 is formed by bending a rectangular metal strip into an annular structure with a horizontal cross section of C. The anti-slip ring 13 is fixedly installed on the outer circumferential surface of the main body 10. The anti-slip ring 13 has several deformation grooves 14. The deformation grooves 14 are quadrilateral grooves that extend obliquely from the top to the bottom of the anti-slip ring 13. Several mounting holes 12 are equidistantly opened on the inner circumferential surface of the main body 10. The mounting holes 12 penetrate the main body 10. The hooks 11 are fixedly installed on the inner circumferential surface of the main body 10. The hooks 11 are integrally formed with the main body 10 and form a bent rod.

[0027] It should be noted that the main body 10 in this solution is applicable to municipal drainage projects and the installation of anti-fall nets for manholes. Taking a nylon rope woven net as an example, the anti-fall net can be installed by hanging it with multiple hooks 11 on the inner wall of the main body 10. The main body 10 can be installed and fixed to the inner wall of the manhole by using expansion bolts through the mounting holes 12. The main body 10, which is formed by a strip bend, can adapt to the diameter of a circular manhole within a certain range, thereby improving the adaptability of the installation. With the rubber anti-slip ring 13 and multiple deformation grooves 14, when the main body 10 is fixed to the inner wall of the manhole, the anti-slip ring 13 is squeezed and forms good adhesion with the inner wall of the manhole. The multiple deformation grooves 14 can increase the deformation range of the anti-slip ring 13 to adapt to the unevenness of the inner wall of the manhole.

[0028] like Figure 1 and Figure 3 As shown, the support assembly is detachably connected to the main body 10 to prop the main body 10 open to contact the inner wall of the manhole;

[0029] The support assembly includes an internal threaded sleeve 20 and a threaded rod 21. The threaded rod 21 is threadedly connected to the internal threaded sleeve 20. The inner wall of the main body 10 is provided with a non-detachment groove 15 for limiting the internal threaded sleeve 20. At least two sets of non-detachment grooves 15 are provided on the inner wall of the main body 10. The two non-detachment grooves 15 in the same set are respectively used to limit the ends of the internal threaded sleeve 20 and the threaded rod 21. The two sets of non-detachment grooves 15 are staggered and close to the upper and lower end faces of the main body 10 respectively.

[0030] To enhance installation flexibility, an adjustable-length support rod is formed by rotating the internal threaded sleeve 20 and the threaded rod 21. The two ends of the support rod are inserted into two anti-slip grooves 15 of the same group. The anti-slip grooves 15 push the main body 10, causing the anti-slip ring 13 to contact the inner wall of the manhole, thus installing the main body 10. Taking a 90-degree angle between the two sets of anti-slip grooves 15 as an example, a support rod is installed in each of the two sets of anti-slip grooves 15, with the two support rods intersecting at a 90-degree angle. This ensures that the main body 10 has at least four stress points. Rotating the internal threaded sleeve 20 in conjunction with the deformable anti-slip ring 13 provides support and limits for the main body 10, making the installation of the main body 10 more flexible and adaptable without sacrificing load-bearing capacity.

[0031] The working principle of this utility model is as follows: The fall protection net can be installed by hooking it with multiple hooks 11 on the inner wall of the main body 10. The main body 10 can be installed and fixed to the inner wall of the manhole by using expansion bolts passing through the mounting holes 12. The main body 10, formed by a strip-shaped bend, can adapt to the diameter of a circular manhole within a certain range, thereby improving the adaptability of the installation. Through the anti-slip ring 13 made of rubber material and multiple deformation grooves 14, when the main body 10 is fixed to the inner wall of the manhole, the anti-slip ring 13 is compressed and forms a good adhesion with the inner wall of the manhole. By rotating the internal threaded sleeve 20 and the screw... The threaded rod 21 forms an adjustable-length support rod. The two ends of the support rod are inserted into the two anti-detachment grooves 15 of the same group. The anti-detachment grooves 15 push the main body 10 so that the anti-slip ring 13 abuts against the inner wall of the manhole to install the main body 10. Taking the included angle of the two sets of anti-detachment grooves 15 as 90 degrees as an example, a support rod is installed in each of the two sets of anti-detachment grooves 15. The two support rods are distributed at a 90-degree angle, so that the main body 10 has at least four force points. By rotating the internal threaded sleeve 20 in conjunction with the deformable anti-slip ring 13, the support and limit of the main body 10 can be achieved, and the installation and fixation of the main body can also be achieved.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A manhole safety net fixing device, characterized in that, include: The main body (10) forms an open ring structure. An anti-slip ring (13) is fixedly installed on one side of the main body (10). The main body (10) has several mounting holes (12) for installation. The main body (10) is also fixedly installed with hooks (11) for hanging nets. The support component is detachably connected to the main body (10) for opening the main body (10) to contact the inner wall of the manhole.

2. The manhole anti-fall net fixing device according to claim 1, characterized in that: The main body (10) is formed by bending a rectangular metal strip to form a ring structure with a horizontal cross section of C. The anti-slip ring (13) is fixedly installed on the outer circumference of the main body (10).

3. The manhole anti-fall net fixing device according to claim 1, characterized in that: The anti-slip ring (13) has several deformation grooves (14), which are quadrilateral grooves that extend obliquely from the top to the bottom of the anti-slip ring (13).

4. The manhole anti-fall net fixing device according to claim 1, characterized in that: The inner circumferential surface of the main body (10) is provided with a plurality of mounting holes (12) at equal intervals, and the mounting holes (12) penetrate the main body (10).

5. The manhole anti-fall net fixing device according to claim 1, characterized in that: The hook (11) is fixedly installed on the inner circumferential surface of the main body (10). The hook (11) is integrally formed with the main body (10) and forms a bent rod.

6. The manhole anti-fall net fixing device according to claim 1, characterized in that: The support assembly includes an internal threaded sleeve (20) and a threaded rod (21). The threaded rod (21) is threadedly connected to the internal threaded sleeve (20). The inner wall of the main body (10) is provided with an anti-dislodgement groove (15) for limiting the internal threaded sleeve (20).

7. The manhole anti-fall net fixing device according to claim 6, characterized in that: The inner wall of the main body (10) has at least two sets of anti-detachment grooves (15). The two anti-detachment grooves (15) in the same set are used to limit the ends of the internal thread sleeve (20) and the threaded rod (21), respectively. The two sets of anti-detachment grooves (15) are staggered and close to the upper and lower end faces of the main body (10).

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