Counterweight flip cap emergency relief manhole

Abstract

This utility model relates to the field of emergency relief manhole technology, and in particular to a counterweight flip-top type emergency relief manhole, comprising: a flange, one end of which is fixedly connected to a manhole body, a cover plate provided on one side of the top of the manhole body, an air valve connected to one side of the top of the cover plate, a protective component provided at the bottom of the air valve, the protective component including a protective cover, an exhaust hole opened in the middle of one side of the protective cover, and two ends of one side of the protective cover fixedly connected to a sliding groove, a slider slidably connected inside the sliding groove, a scraper fixedly connected to one end of the slider, the scraper sliding on one side of the exhaust hole, the protective cover covering the bottom of the air valve and the exhaust hole to prevent external impurities (such as dust, rainwater) from entering the pressure relief channel, the slider can be manually driven to realize the reciprocating motion of the scraper, the scraper slides close to the edge of the exhaust hole to scrape off the attached crystals, viscous media or particulate impurities such as rust, polymers, to prevent the exhaust hole from being blocked and causing the air valve to fail.

Description

Technical Field

[0001] This utility model relates to the field of emergency release manhole technology, and in particular to a counterweight flip-top emergency release manhole. Background Technology

[0002] Vent manholes are important functional components on industrial equipment (such as storage tanks, pipelines, and reactors). Their function is involved in multiple aspects of equipment operation, maintenance, and safety. They are used to discharge residual media (such as liquids, gases, and solid particles) before equipment maintenance and cleaning, so as to prevent residual media from affecting maintenance safety or polluting the environment.

[0003] In the existing technology, the valve disc of the counterweight flip-top emergency relief manhole is prone to blockage and may be slightly open, resulting in slow leakage of the medium (such as the release of trace amounts of toxic gas), or the material inside the equipment may be forced to be discharged through other unsafe channels (such as the breather valve or the gap in the manhole cover) due to poor pressure relief, which causes material waste and environmental pollution. Therefore, a counterweight flip-top emergency relief manhole is provided. Utility Model Content

[0004] To address the shortcomings of existing technologies, the utility model provides the following technical solution: a counterweight flip-top emergency vent manhole, comprising: a flange, one end of which is fixedly connected to a manhole body, a cover plate provided on one side of the top of the manhole body, an air valve connected to one side of the top of the cover plate, and a protective component provided at the bottom of the air valve.

[0005] The protective component includes a protective cover with an exhaust hole in the middle of one side. Both ends of one side of the protective cover are fixedly connected to a sliding groove, and a slider is slidably connected inside the sliding groove. A scraper is fixedly connected to one end of the slider and slides on one side of the exhaust hole.

[0006] As an improvement to the above technical solution, a positioning plate is fixedly connected to one side of the manhole body, and a connecting plate is hinged to one side of the positioning plate.

[0007] As an improvement to the above technical solution, two sets of limiting plates are fixedly connected to the top of the connecting plate, and the bottom ends of the two sets of limiting plates are fixedly connected to the top of the positioning plate.

[0008] As an improvement to the above technical solution, an adjusting rod is provided at the junction of the connecting plate and the limiting plate.

[0009] As an improvement to the above technical solution, L-shaped connecting plates are fixedly connected to both sides of the protective cover, and the side of the L-shaped connecting plate away from the protective cover is fixedly connected to the bottom end of the cover plate.

[0010] As an improvement to the above technical solution, a rubber pad is fixedly connected to the side of the scraper near the exhaust hole, and a screw is provided at the junction of the scraper and the slider.

[0011] As an improvement to the above technical solution, a protective pad is provided on the periphery of the chute, and the protective pad is fixedly connected to one end of the protective cover.

[0012] The beneficial effects of this utility model are as follows: As a two-stage pressure relief device, the air valve opens first to relieve pressure when the equipment pressure rises slowly but does not reach the opening pressure of the cover plate, thus avoiding frequent operation of the cover plate. The air valve relieves pressure before the cover plate, which can reduce the pressure impact when the cover plate opens, reduce the wear between the cover plate and the sealing surface, and extend the service life of the device. The protective cover covers the bottom of the air valve and the exhaust hole to prevent external impurities (such as dust and rainwater) from entering the pressure relief channel. At the same time, it plays a buffering role on the high-speed airflow discharged by the air valve, reducing noise and impact. The slide groove is fixed on both sides of the protective cover to provide a linear sliding track for the slider, ensuring that the scraper moves accurately along the edge of the exhaust hole. The slider can be manually driven to realize the reciprocating motion of the scraper. The scraper slides close to the edge of the exhaust hole to scrape off the attached crystals, viscous media or particulate impurities (such as rust and polymers), preventing the exhaust hole from being blocked and causing the air valve to fail. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3 This is a top view of the installation structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the installation of the protective component structure of this utility model.

[0018] Reference numerals: 1. Flange; 11. Manhole body; 12. Cover plate; 14. Connecting plate; 16. Positioning plate; 17. Limiting plate; 18. Adjusting rod; 19. Air valve; 2. Protective component; 21. Protective cover; 22. L-shaped connecting plate; 23. Slide groove; 24. Sliding block; 25. Scraper; 26. Exhaust port; 27. Protective pad. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] See appendix Figure 1-4 As shown, to solve the above problems, a counterweight flip-top emergency release manhole is provided, including: a flange 1, one end of which is fixedly connected to a manhole body 11, a cover plate 12 is provided on one side of the top of the manhole body 11, an air valve 19 is connected to one side of the top of the cover plate 12, and a protective component 2 is provided at the bottom of the air valve 19.

[0024] The protective component 2 includes a protective cover 21. An exhaust hole 26 is provided in the middle of one side of the protective cover 21. Both ends of one side of the protective cover 21 are fixedly connected to a slide groove 23. A slider 24 is slidably connected inside the slide groove 23. A scraper 25 is fixedly connected to one end of the slider 24. The scraper 25 slides on one side of the exhaust hole 26.

[0025] The flange 1 serves as the installation interface, and the device is bolted to the flange face of the equipment (such as a storage tank or reactor) to ensure reliable sealing and construct the main pressure relief channel. The manhole body 11 connects the inside of the equipment to the external atmosphere. When the cover plate 12 is opened, the medium is quickly discharged through the manhole body 11. When the pressure inside the equipment exceeds the counterweight setting value, the gas pressure pushes up the cover plate 12, opening the pressure relief channel. After the pressure decreases, the cover plate 12 automatically resets under gravity. The air valve 19 serves as a secondary pressure relief device. When the equipment pressure slowly rises but does not reach the opening pressure of the cover plate 12, the air valve 19 opens first to relieve pressure, avoiding frequent operation of the cover plate 12. The air valve 19 relieves pressure before the cover plate 12, which can reduce the pressure when the cover plate 12 opens. Pressure impact reduces wear between the cover plate 12 and the sealing surface, extending the service life of the device. The protective cover 21 encloses the bottom of the air valve 19 and the exhaust port 26, preventing external impurities (such as dust and rainwater) from entering the pressure relief channel. At the same time, it buffers the high-speed airflow discharged from the air valve 19, reducing noise and impact. The slide groove 23 is fixed on both sides of the protective cover 21, providing a linear sliding track for the slider 24, ensuring that the scraper 25 moves accurately along the edge of the exhaust port 26. The slider 24 can be manually driven to realize the reciprocating motion of the scraper 25. The scraper 25 slides close to the edge of the exhaust port 26, scraping off attached crystals, viscous media or particulate impurities (such as rust and polymers), preventing the exhaust port 26 from becoming blocked and causing the air valve 19 to fail.

[0026] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, a positioning plate 16 is fixedly connected to one side of the manhole body 11, and a connecting plate 14 is hinged to one side of the positioning plate 16.

[0027] The positioning plate 16 is fixed to the side of the manhole body 11, and a hinge hole (such as a pin hole) is opened on one side to provide a rotation fulcrum for the connecting plate 14, ensuring that the connecting plate 14 can rotate stably around the positioning plate 16 when subjected to force, and avoiding connection failure caused by shaking.

[0028] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, the top of the connecting plate 14 is fixedly connected to two sets of limiting plates 17, and the bottom of the two sets of limiting plates 17 is fixedly connected to the top of the positioning plate 16.

[0029] The inner sidewall of the limiting plate 17 is in close contact with both sides of the connecting plate 14 to prevent it from wobbling in the horizontal direction, ensuring that the connecting plate 14 rotates along the fixed axis and avoiding force transmission failure due to offset.

[0030] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, an adjusting rod 18 is provided at the junction of the connecting plate 14 and the limiting plate 17.

[0031] The adjusting rod 18 is usually a screw structure, with one end hinged or fixed to the inside of the limiting plate 17, and the other end can be rotated to extend and retract (such as by thread adjustment) to change its extension length. Rotating the adjusting rod 18 clockwise increases its extension length → the connecting plate 14 contacts the adjusting rod 18 earlier → the opening angle of the cover plate 12 decreases; rotating the adjusting rod 18 counterclockwise shortens its extension length → the connecting plate 14 can rotate to a larger angle → the opening angle of the cover plate 12 increases.

[0032] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, both sides of the protective cover 21 are fixedly connected to L-shaped connecting plates 22, and the side of the L-shaped connecting plate 22 away from the protective cover 21 is fixedly connected to the bottom end of the cover plate 12.

[0033] The right-angle design of the L-shaped connecting plate 22 allows it to fit the bottom and side (or vertical) surfaces of the cover plate 12 simultaneously. After being fixed by bolts or welding, it forms a stable structure of "surface contact + right-angle support", preventing the protective cover 21 from shaking or falling off during airflow impact or vibration.

[0034] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, a rubber pad is fixedly connected to the side of the scraper 25 near the exhaust port 26, and a screw is provided at the junction of the scraper 25 and the slider 24.

[0035] By using a rubber pad, direct contact between the scraper 25 and the exhaust hole 26 can be avoided, thereby reducing friction on the exhaust hole 26.

[0036] For specific implementation details, please refer to [link / reference]. Figure 1-4 Specifically, a protective pad 27 is provided around the circumference of the slide 23, and the protective pad 27 is fixedly connected to one end of the protective cover 21.

[0037] The protective pad 27 is in close contact with the inner wall of the slide groove 23 and the outer periphery of the slider 24, forming a "flexible sealing layer" to prevent dust, liquid or corrosive media from entering the manhole body 11 through the gap of the slide groove 23.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A counterweight flip cover emergency relief manhole characterized by, include: A flange (1) is fixedly connected to a manhole body (11) at one end. A cover plate (12) is provided on one side of the top of the manhole body (11). A gas valve (19) is connected to one side of the top of the cover plate (12). A protective component (2) is provided at the bottom of the gas valve (19). The protective component (2) includes a protective cover (21), with an exhaust hole (26) in the middle of one side of the protective cover (21). Both ends of one side of the protective cover (21) are fixedly connected to a sliding groove (23). A slider (24) is slidably connected inside the sliding groove (23). A scraper (25) is fixedly connected to one end of the slider (24). The scraper (25) slides on one side of the exhaust hole (26).

2. The counterweight flip manhole emergency relief according to claim 1, wherein: A positioning plate (16) is fixedly connected to one side of the manhole body (11), and a connecting plate (14) is hinged to one side of the positioning plate (16).

3. The counterweight flip manhole emergency relief according to claim 2, wherein: The top of the connecting plate (14) is fixedly connected to two sets of limiting plates (17), and the bottom ends of the two sets of limiting plates (17) are fixedly connected to the top of the positioning plate (16).

4. The counterweight flip manhole emergency relief according to claim 3, wherein: An adjusting rod (18) is provided at the junction of the connecting plate (14) and the limiting plate (17).

5. The counterweight flip manhole emergency relief according to claim 4, wherein: Both sides of the protective cover (21) are fixedly connected to L-shaped connecting plates (22), and the side of the L-shaped connecting plate (22) away from the protective cover (21) is fixedly connected to the bottom end of the cover plate (12).

6. The counterweight flip manhole emergency relief according to claim 1, wherein: A rubber pad is fixedly connected to the side of the scraper (25) near the exhaust hole (26), and a screw is provided at the junction of the scraper (25) and the slider (24).

7. The counterweight flip manhole emergency relief according to claim 5, wherein: The circumference of the slide (23) is provided with a protective pad (27), which is fixedly connected to both ends of one side of the protective cover (21).

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