A well pit anti-falling device for urban safety engineering

Abstract

The utility model discloses a kind of sewage well anti-falling devices for urban safety engineering, including well body and the well seat located at the top of well body, further including the anti-falling mechanism located in the inside of well seat, the inside of well seat is provided with a ring of annular shoulder, and the anti-falling mechanism includes left frame and right frame slidingly connected in the inside of left frame, left frame and right frame are all clamped on shoulder by quick-connect mechanism, left frame is made of two parallel long bars one and multiple cross bars fixedly connected between the two, one end of long bar one is provided with slot hole, and the inside of this end is provided with inner cavity communicated with slot hole, and long bar one is provided with bolt threadedly connected above slot hole;The utility model has the function of flexible adaptation to different specifications wellhead and the function of quick installation and disassembly, alleviate the problem that anti-falling device can not be flexibly adapted, and the problem that general-purpose is not strong, while improving security, significantly reduce the procurement, warehousing and maintenance cost of municipal department.

Description

Technical Field

[0001] This utility model relates to the field of sewage well safety protection technology, and in particular to a sewage well anti-fall device for urban safety engineering. Background Technology

[0002] Sewage manholes, also known as sewer manholes, are an important part of urban safety engineering. They are mainly used for inspecting and cleaning sewer pipes. Sewage manholes are usually equipped with manhole covers, which can be opened when it is necessary to go down into the pipes for inspection. With the frequent occurrence of accidents involving falling into manholes, anti-fall devices have gradually been installed in sewage inspection manholes. These devices are placed below the manhole cover, so that even if the manhole cover is not covered, people will not fall directly into the sewer pipes.

[0003] For example, patent number CN222976052U discloses a fall-prevention device for sewage wells used in urban safety engineering. It includes a well body and a well cover at the top of the well body. Fall-prevention components are installed on the stepped surface of the well body. These components include a support ring and a fall-prevention plate, which are movably connected by multiple snap-fit ​​components. The snap-fit ​​components are movably installed on the support ring and include a fixing block, a pin, and a fixing rod. One end of the pin and one end of the fixing rod are fixedly connected to the bottom surface of the fixing block, while the other end of the pin and the other end of the fixing rod extend downwards and slides onto the support ring. By pulling the fixing block upwards, the fixing block causes the fixing rod and the pin to slide upwards along the second and first insertion holes, respectively. The bottom end of the pin is pulled out of the snap-fit ​​hole and positioned in the first insertion hole, allowing the fall-prevention plate to be removed from the support ring. This method is convenient and quick, reducing construction hazards, minimizing damage to the well body, and extending the service life of the well body.

[0004] For example, patent number CN218346259U discloses a well inspection anti-fall device, relating to the field of well inspection technology. This device includes an anti-fall net, multiple mounting seats on the well wall, and a support block fixedly connected to one end of each mounting seat near the bottom of the well. The anti-fall net is placed on the support block, with its periphery abutting against the support block. The mounting seats are equipped with fasteners for securing the anti-fall net. With this well inspection anti-fall device, when it is necessary to remove the anti-fall net's fixed connection, the connection is rotated so that the clearance groove is directly below the bolted connection, allowing the anti-fall net to be lifted. The process of removing the anti-fall net is relatively simple.

[0005] Regarding the above description, the applicant believes that the following problems exist: Although the existing sewage well anti-fall device reduces construction risks and damage to the well body, the fixed anti-fall device may not be flexible and adaptable due to the different sizes of sewage well openings, and its versatility is not strong. Although the anti-fall rope can adapt to well openings of different sizes, the aging of the material can easily lead to structural damage and create safety hazards. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a sewage well anti-fall device for urban safety engineering, which has the functions of flexibly adapting to different specifications of well openings and quick installation and disassembly, alleviating the problem that the anti-fall device may not be flexible and adaptable and has poor versatility. While improving safety, it significantly reduces the procurement, storage and maintenance costs of municipal departments.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A fall prevention device for sewage wells used in urban safety engineering includes a well body and a well base located at the top of the well body, and also includes a fall prevention mechanism located inside the well base. A ring-shaped shoulder platform is provided on the inner side of the well base. The fall prevention mechanism includes a left frame and a right frame slidably connected inside the left frame. Both the left frame and the right frame are snapped onto the shoulder platform by a quick-connect mechanism.

[0009] In one optional embodiment, the left frame consists of two parallel long rods and multiple crossbars fixedly connected between them. One end of the long rod has a slot, and the interior of that end has an inner cavity communicating with the slot. A bolt is threaded onto the long rod above the slot, and the end of the bolt can be screwed into the inner cavity.

[0010] In one optional embodiment, the right frame consists of two parallel long rods and multiple crossbars fixedly connected between them. One end of each long rod is fixedly connected to a connecting block, and the end of the connecting block is fixedly connected to a slider.

[0011] In one optional embodiment, the quick-connect mechanism includes an upper locking block and a lower locking block, with a gap between the upper locking block and the lower locking block. The upper locking block is fixedly connected to one end of a long rod, and a groove is provided on the outside of the upper rod. The lower locking block is slidably connected in the groove. A spring is provided between the lower locking block and the inner wall of the groove. One end of the connecting rod passes through the end of the groove and is connected to the lower locking block, and the other end is fixedly connected to the synchronizing rod.

[0012] In one alternative embodiment, the cross-section of the slider is larger than that of the connecting block, and it is slidably disposed in and fitted with the inner cavity with a larger cross-section, while the connecting block is slidably disposed in and fitted with the slot with a smaller cross-section, so that the connecting block can pass through the slot while the slider is limited in the inner cavity, thereby forming an anti-detachment structure.

[0013] In one alternative embodiment, when the bolt is screwed in, its end extends into the inner cavity and presses its bottom against the top of the connecting block to achieve locking; when the bolt is screwed out, its end exits the inner cavity to release the pressure on the connecting block and achieve unlocking.

[0014] In one optional embodiment, a set of quick-connect mechanisms is provided at one end of both the left and right frames. Each set contains two quick-connect mechanisms, and the two quick-connect mechanisms in the same set are synchronized through a synchronizing rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By using a sliding connection structure between the right frame and the left frame, and by using bolts to lock the overall length, the fall arrestor can be flexibly adapted to different sizes of well openings, effectively improving its versatility and alleviating the problem that fall arrestors may not be flexible and have poor versatility. While improving safety, it significantly reduces the procurement, storage and maintenance costs for municipal departments.

[0017] 2. The structure of directly snapping and fixing the fall arrestor to the well seat shoulder through the quick-connect mechanism enables rapid installation and disassembly, and is easy to operate. This fixing method does not require drilling holes or installing bolts on the well body, avoiding damage to the well body structure and providing good structural protection.

[0018] 3. Due to its rigid frame structure, the device has higher mechanical strength and durability, effectively mitigating the risk of structural failure caused by material aging and fatigue damage in flexible fall protection nets, thereby significantly improving the safety and reliability of long-term use. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a sewage well anti-fall device for urban safety engineering;

[0020] Figure 2 A schematic diagram of the anti-fall mechanism of a sewage well anti-fall device for urban safety engineering;

[0021] Figure 3 A schematic diagram of the internal cross-sectional structure of the long rod of a fall-prevention device for sewage wells used in urban safety engineering.

[0022] Figure 4 This is a schematic diagram of the quick-connect mechanism of a sewage well anti-fall device for urban safety engineering.

[0023] In the diagram: 1. Well body; 2. Well base; 201. Shoulder platform; 3. Fall protection mechanism; 4. Left frame; 401. Long rod one; 402. Slot; 403. Inner cavity; 404. Bolt; 5. Right frame; 501. Long rod two; 502. Connecting block; 503. Sliding block; 6. Crossbar; 7. Quick-connect mechanism; 701. Upper locking block; 702. Slide groove; 703. Lower locking block; 704. Spring; 705. Connecting rod; 706. Synchronizing rod. Detailed Implementation

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] Please refer to Figure 1-4 A fall prevention device for sewage wells used in urban safety engineering includes a well body 1 and a well base 2 located at the top of the well body 1, and also includes a fall prevention mechanism 3 located inside the well base 2. A ring-shaped shoulder platform 201 is provided on the inner side of the well base 2. The fall prevention mechanism 3 includes a left frame 4 and a right frame 5 slidably connected inside the left frame 4. Both the left frame 4 and the right frame 5 are snapped onto the shoulder platform 201 by a quick-connect mechanism 7.

[0026] In a preferred embodiment of this utility model, the left frame 4 is composed of two parallel long rods 401 and multiple crossbars 6 fixedly connected between them. One end of the long rod 401 has a slot 402, and the inside of this end has an inner cavity 403 that communicates with the slot 402. A bolt 404 is threadedly connected to the long rod 401 above the slot 402, and the end of the bolt 404 can be screwed into the inner cavity 403. The right frame 5 is inserted into the inner cavity 403 and the slot 402 of the left frame 4 through a slider 503 and a connecting block 502, realizing a seamless sliding connection between the two frames. This allows the device to flexibly adapt to wellheads of different diameters, significantly improving the versatility of the product.

[0027] In a preferred embodiment of this utility model, the right frame 5 is composed of two parallel long rods 501 and multiple crossbars 6 fixedly connected between them. One end of the long rod 501 is fixedly connected to a connecting block 502, and the end of the connecting block 502 is fixedly connected to a slider 503. The right frame 5 is inserted into the inner cavity 403 and slot 402 of the left frame 4 through the slider 503 and the connecting block 502, realizing a seamless sliding connection between the two frames. This allows the device to flexibly adapt to wellheads of different diameters, significantly improving the versatility of the product.

[0028] In a preferred embodiment of this utility model, the quick-connect mechanism 7 includes an upper locking block 701 and a lower locking block 703, with a gap between the upper locking block 701 and the lower locking block 703. The upper locking block 701 is fixedly connected to one end of a long rod 401, and a groove 702 is provided on the outside of this end. The lower locking block 703 is slidably connected in the groove 702. A spring 704 is provided between the lower locking block 703 and the inner wall of the groove 702. One end of the connecting rod 705 passes through the end of the groove 702 and is connected to the lower locking block 703, and the other end is fixedly connected to the synchronizing rod 706. This facilitates the quick connection of the fall arrest mechanism 3 to the shoulder platform 201 by pulling the synchronizing rod 706.

[0029] In a preferred embodiment of this utility model, the cross-section of the slider 503 is larger than that of the connecting block 502, and it is slidably disposed in and fitted with the inner cavity 403 with a larger cross-section. The connecting block 502 is slidably disposed in and fitted with the slot 402 with a smaller cross-section, so that the connecting block 502 can pass through the slot 402 while the slider 503 is limited in the inner cavity 403, thereby forming an anti-detachment structure. This allows the frame to extend and retract freely, but effectively prevents the right frame 5 from completely detaching from the left frame 4, ensuring the integrity and safety during use.

[0030] In a preferred embodiment of this utility model, when the bolt 404 is screwed in, its end extends into the inner cavity 403 and its bottom presses against the top of the connecting block 502 to achieve locking. When the bolt 404 is screwed out, its end exits the inner cavity 403, thereby releasing the pressure on the connecting block 502 and achieving unlocking. This is beneficial for controlling the locking and fixing of the frame's extension and retraction.

[0031] In a preferred embodiment of this utility model, a set of quick-connect mechanisms 7 is provided at one end of both the left frame 4 and the right frame 5. Each set contains two quick-connect mechanisms 7, and the two quick-connect mechanisms 7 in the same set are synchronously controlled by a synchronizing rod 706, which is beneficial for synchronously controlling the synchronous movement of the quick-connect mechanisms 7 on one side.

[0032] In a preferred embodiment of this utility model, the left frame 4 and the right frame 5 are made of stainless steel or high-strength aluminum alloy and are subjected to surface anodizing or powder coating treatment. The slider 503 is made of copper-based alloy with embedded solid lubricant to ensure smooth sliding even in a dirty environment. The spring 704 is made of stainless steel and is subjected to stress-relief annealing and surface passivation treatment to maximize resistance to corrosion and fatigue.

[0033] In a preferred embodiment of this utility model, the fall arrestor 3 is designed to bear a load of not less than 150 kg. Long rod 1 401 and long rod 2 501 are made of square or rectangular high-strength aluminum alloy tubing or stainless steel tubing with a wall thickness of not less than 2.5 mm. Multiple crossbars 6 are made of tubing of the same or slightly smaller specifications. The upper locking block 701 and lower locking block 703 are both made of heat-treated 45# steel or equivalent strength material with a thickness of not less than 8 mm. The cross-sectional dimensions of the slider 503 are designed for high-precision sliding fit with the inner cavity 403, with a single-sided gap controlled at 0.1-0.3 mm. The thickness of the slider 503 is not less than 10 mm to ensure sufficient contact area to effectively transfer force to the left frame 4 when subjected to fall impact, avoiding stress concentration.

[0034] During installation, the operator first loosens bolt 404 (left frame 4), opens the well cover, and places the fall arrest mechanism 3 (left frame 4) above the well opening. Based on the sliding connection structure formed by the right frame 5 (left frame 4) and the connecting block 502 (left frame 4) inserted into the inner cavity 403 (left frame 4) and the slot 402 (left frame 4), the fall arrest mechanism 3 (left frame 4) can be adjusted to a suitable size along the well opening shoulder 201 (left frame 4). Then, bolt 404 (left frame 4) is tightened to fix the length. Next, the entire structure is placed on the shoulder 201 (left frame 4), and the left frame 4 and right frame 5 are operated sequentially. Synchronous rod 706 left frame 4: Pulling synchronous rod 706 left frame 4 causes lower locking block 703 left frame 4 to retract, lowering the frame so that upper locking block 701 left frame 4 is close to the upper surface of shoulder platform 201 left frame 4. After releasing synchronous rod 706 left frame 4, spring 704 left frame 4 pushes lower locking block 703 left frame 4 back to below shoulder platform 201 left frame 4, forming a clamping structure with upper locking block 701 left frame 4, thereby realizing quick locking and fixing of fall protection mechanism 3 left frame 4. When disassembling, simply pull both sides of synchronous rod 706 left frame 4 to retract lower locking block 703 left frame 4, and the fall protection mechanism 3 left frame 4 can be lifted out as a whole.

[0035] Although only certain components and embodiments of this application have been illustrated and described, many modifications and alterations (e.g., variations in the size, dimensions, structure, shape and proportion of the various elements, installation arrangement, material use, color, orientation, etc.) will be conceived by those skilled in the art without actually departing from the scope and spirit of the claims.

[0036] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A fall prevention device for sewage wells used in urban safety engineering, characterized in that: It includes a well body (1) and a well seat (2) located at the top of the well body (1), and also includes a fall protection mechanism (3) located inside the well seat (2). A ring-shaped shoulder platform (201) is provided on the inner side of the well seat (2). The fall protection mechanism (3) includes a left frame (4) and a right frame (5) slidably connected inside the left frame (4). The left frame (4) and the right frame (5) are both snapped onto the shoulder platform (201) by a quick-connect mechanism (7).

2. The anti-fall device for sewage wells in urban safety engineering according to claim 1, characterized in that: The left frame (4) consists of two parallel long rods (401) and multiple crossbars (6) fixedly connected between them. One end of the long rod (401) is provided with a slot (402), and the inside of this end is provided with an inner cavity (403) that communicates with the slot (402). A bolt (404) is threadedly connected to the long rod (401) above the slot (402), and the end of the bolt (404) can be screwed into the inner cavity (403).

3. The anti-fall device for sewage wells in urban safety engineering according to claim 1, characterized in that: The right frame (5) consists of two parallel long rods (501) and multiple crossbars (6) fixedly connected between them. One end of the long rod (501) is fixedly connected to a connecting block (502), and the end of the connecting block (502) is fixedly connected to a slider (503).

4. The anti-fall device for sewage wells in urban safety engineering according to claim 1, characterized in that: The quick-connect mechanism (7) includes an upper locking block (701) and a lower locking block (703). There is a gap between the upper locking block (701) and the lower locking block (703). The upper locking block (701) is fixedly connected to one end of a long rod (401). A groove (702) is provided on the outside of this end. The lower locking block (703) is slidably connected in the groove (702). A spring (704) is provided between the lower locking block (703) and the inner wall of the groove (702). One end of the connecting rod (705) passes through the end of the groove (702) and is connected to the lower locking block (703). The other end is fixedly connected to the synchronizing rod (706).

5. A sewage well anti-fall device for urban safety engineering according to claim 2 or 3, characterized in that: The cross-section of the slider (503) is larger than that of the connecting block (502), and it is slidably disposed in the inner cavity (403) with a larger cross-section and fits therewith. The connecting block (502) is slidably disposed in the slot (402) with a smaller cross-section and fits therewith, so that the connecting block (502) can pass through the slot (402) and the slider (503) is limited in the inner cavity (403), thereby forming an anti-detachment structure.

6. A sewage well anti-fall device for urban safety engineering according to claim 2 or 3, characterized in that: When the bolt (404) is screwed in, its end extends into the inner cavity (403) and presses its bottom against the top of the connecting block (502) to lock it. When the bolt (404) is screwed out, its end exits the inner cavity (403) to release the pressure on the connecting block (502) and unlock it.

7. A sewage well anti-fall device for urban safety engineering according to claim 1 or 4, characterized in that: A set of quick-connect mechanisms (7) is provided at one end of the left frame (4) and the right frame (5). Each set contains two quick-connect mechanisms (7), and the two quick-connect mechanisms (7) in the same set are synchronized through a synchronizing rod (706).

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