Anti-falling net fixing device for wellhead
By changing the stress direction of the anti-fall net body from the inclined direction of the hook and the screw to the vertical direction in the wellhead anti-fall net fixing device, the problems of stress concentration and load-bearing capacity in the prior art are solved, and more stable and Efficient fixing effect.
Patent Information
- Application Number
- CN202421020658.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The load bearing of the existing anti-fall net is mainly concentrated at the connection point between the hook and the screw, which leads to stress concentration, fatigue and damage of the hook. At the same time, the load bearing capacity in the vertical direction is weak and prone to deformation or damage.
A wellhead anti-fall net fixing device is designed. By uniformly fixing the screw on the inner surface of the shaft, and the anti-fall net body is snapped on the screw, including a fixing ring, base and groove, to ensure the main force of the anti-fall net body. The direction changes to the vertical direction, and more efficient load-bearing distribution is achieved through the screw.
It improves load-bearing capacity, reduces stress concentration, enhances structure stability, extends service life, and simplifies the installation and disassembly process.
Smart Images
Figure CN222227374U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-falling nets, in particular to an anti-falling net fixing device for a wellhead. Background Art
[0002] There are many underground pipelines in urban construction, such as sewers, underground gas pipelines, water pipelines, power pipelines, communication pipelines, national defense pipelines, etc. These pipelines must have an exit to the ground at intervals. The section from the pipeline to the ground is called a manhole. The manhole opening is usually flush with the ground. The cover used to cover the manhole is called a manhole cover or a manhole cover. When the manhole cover is damaged or lost, it will cause passers-by to fall into the well and cause danger. To solve this problem, anti-fall nets are usually installed inside the well. At present, the main installation method of the anti-fall net is to first drive several screws into the interior of the well to fix them, and then fix several hooks on the anti-fall net, and then hang several hooks on the corresponding screws one by one to achieve the fixed installation of the anti-fall net;
[0003] However, when the anti-fall net is fixed in the above manner, the load-bearing of the anti-fall net is mainly concentrated on the connection point between the hook and the screw, which is prone to stress concentration and causes fatigue and damage to the hook. At the same time, when the force direction of the anti-fall net is transmitted through the inclined direction of the hook and the screw, the load-bearing capacity of this structure in the vertical direction is weak. When the anti-fall net is subjected to a large weight or external force, it is prone to deformation or damage, posing certain safety hazards. Therefore, a wellhead anti-fall net fixing device is proposed in view of the above situation. Utility Model Content
[0004] The purpose of the utility model is to solve the problem in the prior art that the load-bearing of the anti-fall net is mainly concentrated on the connection point between the hook and the screw, which is prone to stress concentration and causes fatigue and damage to the hook. At the same time, when the force direction of the anti-fall net is transmitted through the inclined direction of the hook and the screw, the load-bearing capacity of this structure in the vertical direction is weak. When the anti-fall net is subjected to a large weight or external force, it is easy to be deformed or damaged. A fixing device for an anti-fall net for a wellhead is proposed to solve the problem.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A fall prevention net fixing device for a wellhead comprises a wellway and screw rods, wherein a plurality of screw rods are evenly fixed on the inner surface of the wellway, and a fall prevention net body is commonly clamped on the plurality of screw rods, and the fall prevention net body comprises a fixing ring, a fall prevention net body, a base and a groove, a plurality of bases are evenly fixed on the bottom of the fixing ring, and a groove is penetrated on one side of the outside of the plurality of bases, and the groove is clamped with the corresponding screw rods.
[0007] Preferably, the fixing ring is in the shape of a circular ring, and the anti-falling net body is fixed to the inner ring of the fixing ring.
[0008] Preferably, the diameter of the fixing ring is smaller than the inner diameter of the well.
[0009] Preferably, the other end of the screw rod is threadedly connected to a limiting block.
[0010] Preferably, a rubber pad is provided on the top surface inside the groove, and an anti-slip pattern is provided on the bottom surface of the rubber pad.
[0011] Preferably, the limiting block is circular in shape, and a threaded hole is formed through the middle of the limiting block, and the diameter of the threaded hole matches the diameter of the screw.
[0012] The utility model has the following beneficial effects:
[0013] The utility model adopts the structural design of the fixing ring, the base and the groove. When using the device, the screw is first installed inside the wellbore in the same manner as the prior art. When installing the anti-fall net body, the installation of the anti-fall net body can be achieved by clamping the groove and the corresponding screw. By changing the main force direction of the anti-fall net body from the original inclined direction of the hook and the screw to the vertical direction, more effective load distribution is achieved through the screw. This design not only improves the load-bearing capacity, but also reduces stress concentration, enhances the stability of the structure, and prolongs the service life of the device. In addition, by directly clamping the anti-fall net body onto the screw, the original process of installing the hooks one by one is simplified, and the speed of installation and disassembly is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the assembly structure proposed by the utility model;
[0015] Figure 2 This is a schematic diagram of the main structure proposed by the utility model;
[0016] Figure 3 This is a schematic diagram of the overall structure of the anti-falling net body proposed by the utility model;
[0017] Figure 4 The utility model proposed Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.
[0018] In the figure: 1, shaft; 2, screw; 201, limit block; 3, anti-fall net body; 301, fixing ring; 302, anti-fall net body; 303, base; 304, groove. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Reference Figure 1-4 , a wellhead anti-falling net fixing device, including a well 1 and a screw 2, a plurality of screws 2 are evenly fixed on the inner surface of the well 1, and an anti-falling net body 3 is commonly clamped on the plurality of screws 2, the anti-falling net body 3 includes a fixing ring 301, an anti-falling net body 302, a base 303 and a groove 304, the fixing ring 301 is in the shape of a circular ring, and the inner ring of the fixing ring 301 is fixed with the anti-falling net body 302, the anti-falling net body 302 is made of polyester fiber material, the diameter of the fixing ring 301 is smaller than the inner diameter of the well 1, further, the fixing ring 301 is a metal steel ring, and the bottom of the fixing ring 301 is evenly clamped on the inner surface of the well 1, and the anti-falling net body 302 is uniformly clamped on the inner surface of the well 1, and the anti-falling net body 302 is uniformly clamped on the inner surface of the well 1, and the anti-falling net body 302 is uniformly clamped on the inner surface of the well 1, Several bases 303 are evenly fixed, and one side of the outside of several bases 303 is penetrated with a groove 304, the top surface of the inside of the groove 304 is provided with a rubber pad, and the bottom surface of the rubber pad is provided with an anti-slip pattern, the groove 304 is clamped with the corresponding screw 2, and the other end of the outside of the screw 2 is threadedly connected to the limiting block 201, the shape of the limiting block 201 is circular, and a threaded hole is penetrated in the middle position of the limiting block 201, and the diameter of the threaded hole is adapted to the diameter of the screw 2. Through the design of the limiting block 201, the position of the base 303 clamped on the screw 2 can be limited to ensure stability after installation.
[0021] The use method and advantages of the utility model: When the anti-falling net fixing device for the wellhead is used, the working process is as follows:
[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, when using the present device, a plurality of screw rods 2 are first installed inside the well 1 in the same manner as in the prior art, and then a limit block 201 is threadedly sleeved on the other end of each screw rod 2. When installing the anti-falling net body 3, the groove 304 is connected to the corresponding screw rod 2 by clamping, so that the base 303 is clamped on the screw rod 2 located between the inner surface of the well 1 and the limit block 201. At this time, the force direction of the anti-falling net body 3 is vertical. By changing the main force direction of the anti-falling net body 3 from the original inclined direction of the hook and the screw rod 2 to the vertical direction, a more effective load distribution is achieved through the screw rod 2. This design not only improves the load-bearing capacity, but also reduces stress concentration, enhances the stability of the structure, and extends the service life of the device. In addition, by directly clamping the anti-falling net body 3 on the screw rod 2, the original process of installing the hooks one by one is simplified, and the speed of installation and disassembly is greatly improved.
[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A wellhead anti-falling net fixing device, comprising a wellway (1) and a screw (2), characterized in that: A plurality of screw rods (2) are evenly fixed on the inner surface of the shaft (1), and a fall prevention net body (3) is commonly clamped on the plurality of screw rods (2), the fall prevention net body (3) comprises a fixing ring (301), a fall prevention net body (302), a base (303) and a groove (304), a plurality of bases (303) are evenly fixed on the bottom of the fixing ring (301), and a groove (304) is penetrated on one side of the outside of the plurality of bases (303), and the groove (304) is clamped with the corresponding screw rod (2).
2. A wellhead anti-falling net fixing device according to claim 1, characterized in that: The fixing ring (301) is in the shape of a circular ring, and the anti-falling net body (302) is fixed to the inner ring of the fixing ring (301).
3. A wellhead anti-falling net fixing device according to claim 1, characterized in that: The diameter of the fixing ring (301) is smaller than the inner diameter of the well (1).
4. The anti-falling net fixing device for a wellhead according to claim 1, characterized in that: The other end of the outside of the screw rod (2) is threadedly connected to a limiting block (201).
5. The anti-falling net fixing device for wellhead according to claim 1 is characterized in that: The top surface inside the groove (304) is provided with a rubber pad, and the bottom surface of the rubber pad is provided with anti-slip grooves.
6. A wellhead anti-falling net fixing device according to claim 4, characterized in that: The limiting block (201) is circular in shape, and a threaded hole is provided through the middle of the limiting block (201), wherein the diameter of the threaded hole matches the diameter of the screw rod (2).