A well chamber exhaust device for a direct-buried heat supply pipeline network

Abstract

The utility model discloses a kind of well room exhaust devices for direct-burial heating pipeline network, including two exhaust ports respectively connected on water supply pipeline and return water pipeline, exhaust primary valve connected in the end of exhaust port, exhaust secondary valve connected in the end of exhaust primary valve by pipeline, exhaust hose connected in the end of exhaust secondary valve;Operating port is opened in the surface of wellhead cover for exhaust hose subsequent lead-out, mouth cover plate is covered in the top of operating port;The design of the application is innovatively adopted hose to lead exhaust outlet in well room to outside of well room, completely solve the security risk existed in traditional exhaust device, in the process of exhaust operation, gas in pipeline is directly discharged to outdoor environment through hose, avoid the accumulation of gas in well room, thereby effectively prevent personal injury accident caused by gas poisoning, coma or asphyxia of staff, simultaneously, after exhaust, hose can be conveniently put back in well room.

Description

Technical Field

[0001] This utility model belongs to the field of heating pipeline network technology, specifically relating to a well chamber exhaust device for directly buried heating pipeline networks. Background Technology

[0002] In northern my country, winter heating is an important livelihood project to ensure the quality of life of residents and maintain social stability. With the accelerated urbanization process and the continuous improvement of national environmental protection requirements, large-scale centralized heating enterprises have emerged. Their heating scale has continued to expand, with the heating area generally exceeding 10 million square meters and the length of a single main heating pipeline network reaching more than 20 kilometers. This development trend has put forward higher requirements for the stability and safety of the heating system. Currently, due to the limitations of municipal public works projects in various regions, direct burial has become the main method of laying urban heating pipelines. In direct burial heating pipeline systems, in order to ensure the efficient operation of the heating network and avoid problems such as reduced heating efficiency and accelerated pipeline corrosion caused by residual air or insufficient water injection in the pipeline, design specifications usually require the installation of air vents at the highest points of the pipeline to release the gas accumulated during pipeline operation. At the same time, to prevent the air vents from freezing and cracking due to exposure to the outdoor environment, which could lead to pipeline leaks and other safety accidents, and to facilitate the daily inspection and maintenance of the air venting device, the air vents are usually installed separately in a dedicated air venting well.

[0003] However, as an underground enclosed space, the exhaust manhole has a unique internal environment. Actual testing has revealed that the gas composition inside the manhole is complex, generally containing a mixture of one or more gases such as hydrogen, oxygen, carbon dioxide, hydrogen sulfide, and nitrogen. Moreover, the concentration of some gases often exceeds safety limits. This gas environment in a confined space not only poses a corrosion risk to the exhaust device itself but also poses a serious threat to personnel operating inside the manhole. In the design of traditional exhaust devices, the exhaust outlet is directly located inside the manhole. When the exhaust valve is not operated properly, the high-pressure gas in the pipeline may quickly fill the manhole, causing a sharp drop in the oxygen content and an increase in the concentration of toxic and harmful gases. This can easily lead to safety accidents such as unconsciousness and suffocation among personnel. According to statistics, there are frequent accidents in my country every year caused by improper operation of exhaust in the manhole of the heating pipeline network, which has become a safety hazard that urgently needs to be addressed in the heating industry. Therefore, this utility model proposes an exhaust device for the manhole of directly buried heating pipeline networks. Utility Model Content

[0004] The purpose of this utility model is to provide a manhole exhaust device for directly buried heating pipeline networks, in order to solve the problem mentioned in the background art that the traditional exhaust device is directly installed in the manhole, and when the exhaust valve is not operated properly, the high-pressure gas in the pipeline may quickly fill the manhole, causing the oxygen content in the manhole to drop sharply and the concentration of toxic and harmful gases to rise, which can easily cause safety accidents such as coma and suffocation of the staff.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a manhole exhaust device for directly buried heating pipeline networks, comprising... Two vents are connected to the water supply pipe and the return pipe respectively; a primary vent valve is connected to the end of the vent; a secondary vent valve is connected to the end of the primary vent valve via a pipe; and a vent hose is connected to the end of the secondary vent valve. An operating port is opened on the surface of the wellhead cover, from which the air supply and exhaust hose is subsequently extended, and a cover plate is placed over the top of the operating port.

[0006] Preferably, it also includes two winding structures disposed at the bottom of the cover plate, and the top end of the exhaust hose is wound and stored at the bottom of the cover plate through the winding structures.

[0007] Preferably, the winding structure includes a winding post fixed to the bottom surface of the cover plate and a circular tray fixed to the bottom surface of the winding post.

[0008] Preferably, the winding structure further includes a limiting component for compressing and limiting the exhaust hose, the limiting component being disposed on one side of the circular tray.

[0009] Preferably, the limiting component includes a support rod fixed to the side of the circular tray, a movable pressure plate movably sleeved on the support rod, an end plate fixed to the end surface of the movable pressure plate, and a spring sleeved on the surface of the support rod and located between the movable pressure plate and the end plate.

[0010] Preferably, the top surface of the movable pressure plate is also fixed with an anti-slip pressure block, and the anti-slip pressure block is pressed into contact with the exhaust hose.

[0011] Preferably, the bottom surface of the movable pressure plate has a through hole for the support rod to pass through.

[0012] Preferably, one end of the spring abuts against the side of the movable pressure plate, and the other end of the spring abuts against the side of the end plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The manhole exhaust device for directly buried heating pipeline networks proposed in this application, through the innovative design of using a flexible hose to lead the exhaust outlet from the manhole to the outside of the manhole, completely solves the safety hazards of traditional exhaust devices. During the exhaust operation, the gas in the pipeline is directly discharged to the outdoor environment through the flexible hose, avoiding the accumulation of gas in the manhole, thereby effectively preventing personal injury accidents caused by gas poisoning, coma, or suffocation of workers. At the same time, after the exhaust is completed, the flexible hose can be easily put back into the manhole, which not only avoids the risk of freezing and cracking caused by long-term exposure of the pipeline to the outdoors, but also maintains the cleanliness and order of the manhole. Compared with the prior art, this application significantly improves operational safety while ensuring exhaust efficiency, optimizes the exhaust safety risk management system of large-scale heating systems, and creates a safer and more reliable working environment for workers, with significant economic benefits and social value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This utility model Figure 2 A magnified view of a portion of region B in the middle; Figure 4 This is a perspective view of the winding structure of this utility model; Figure 5 This utility model Figure 4 A magnified view of a portion of region C in the middle; In the diagram: 1. Primary exhaust valve; 2. Secondary exhaust valve; 3. Outlet cover; 4. Exhaust hose; 5. Winding structure; 51. Winding column; 52. Circular tray; 53. Limiting component; 531. Support rod; 532. Movable pressure plate; 5321. Rod hole; 533. Spring; 534. End plate; 535. Anti-slip pressure block; 6. Exhaust chamber; 7. Wellhead cover; 8. Operating port; 9. Water supply pipe; 10. Return water pipe; 11. Exhaust port. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example Please see Figures 1 to 5This is an embodiment of the present utility model, which provides the following technical solution: a manhole exhaust device for a directly buried heating pipeline network, comprising... Two vents 11 are connected to the water supply pipe 9 and the return pipe 10 respectively by flanges, a primary vent valve 1 is connected to the end of the vent 11 by flanges, a secondary vent valve 2 is connected to the end of the primary vent valve 1 by pipes and flanges, and a vent hose 4 is connected to the end of the secondary vent valve 2. The operator can open the primary vent valve 1 and the secondary vent valve 2 in sequence so that the gas in the water supply pipe 9 and the return pipe 10 can be discharged through the vent hose 4. An operating port 8 is provided on the surface of the well cover 7, from which the air supply and exhaust hose 4 extends. A cover plate 3 is provided on the top of the operating port 8. The cover plate 3 can close the operating port 8 on the well cover 7 during daily use, and can be easily removed when external exhaust operation is required.

[0017] In this embodiment, preferably, it also includes two winding structures 5 disposed at the bottom of the cover plate 3, and the top end of the exhaust hose 4 is wound and stored at the bottom of the cover plate 3 through the winding structures 5.

[0018] In this embodiment, preferably, the winding structure 5 includes a winding column 51 welded and fixed to the bottom surface of the cover plate 3 and a circular tray 52 fixed to the bottom surface of the winding column 51. After the exhaust is completed, the exhaust hose 4 can be wound around the winding column 51 for storage, and then the cover plate 3 can be covered and fixed on the top of the operating port 8, so that the exhaust hose 4 can be stored in the exhaust well chamber 6.

[0019] In this embodiment, preferably, the winding structure 5 further includes a limiting component 53 that can compress and limit the exhaust hose 4, and the limiting component 53 is disposed on one side of the circular tray 52.

[0020] In this embodiment, preferably, the limiting component 53 includes a support rod 531 welded and fixed to the side of the circular tray 52, a movable pressure plate 532 movably sleeved on the support rod 531, an end plate 534 welded and fixed to the end surface of the movable pressure plate 532, and a spring 533 sleeved on the surface of the support rod 531 and located between the movable pressure plate 532 and the end plate 534.

[0021] In this embodiment, preferably, the top surface of the movable pressure plate 532 is also fixed with an anti-slip pressure block 535, and the anti-slip pressure block 535 is pressed and contacted with the exhaust hose 4, which can realize the pressing and limiting of the winding part of the exhaust hose 4.

[0022] In this embodiment, preferably, the bottom surface of the movable pressure plate 532 is provided with a rod hole 5321 through which the support rod 531 passes.

[0023] In this embodiment, preferably, one end of the spring 533 abuts against the side of the movable pressure plate 532, and the other end of the spring 533 abuts against the side of the end plate 534.

[0024] In summary, before the exhaust operation, the movable pressure plate 532 is first moved to the side, compressing the spring 533 and preventing the anti-slip block 535 from pressing the wound portion of the exhaust hose 4. Then, the movable pressure plate 532 is rotated 180 degrees around the support rod 531, causing the anti-slip block 535 to rotate to the bottom of the circular tray 52, no longer pressing or obstructing the exhaust hose 4. At this point, the exhaust hose 4 can be unwound from the winding column 51. Then, the cover plate 3 is opened and removed, exposing the operating port 8. The exhaust hose 4 is then led out through the operating port 8 to an open area outside the exhaust chamber 6. First, the primary exhaust valve 1 is slowly opened, and then the secondary exhaust valve 2 is slowly opened, allowing the exhaust hose 4 to pass through. Regarding the gas output at the end, adjust the valve openings of the primary exhaust valve 1 and the secondary exhaust valve 2 according to the gas output. After the gas output medium at the end of the exhaust hose 4 changes from "large amount of gas - small amount of gas - small amount of discontinuous clean water - small amount of continuous clean water - large amount of continuous clean water", close the primary exhaust valve 1 and the secondary exhaust valve 2 respectively. Then put the exhaust hose 4 into the winding structure 5 to complete the exhaust operation. Cover the top of the operating port 8 with the cover plate 3 and fix it. Finally, wrap the exhaust hose 4 around the bottom of the cover plate 3 through the winding structure 5 and store it inside the winding structure 5. This avoids the risk of freezing and cracking caused by long-term exposure of the pipeline to the outdoors, and also keeps the interior of the exhaust well chamber 6 clean and orderly.

[0025] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manhole exhaust device for directly buried heating pipeline networks, characterized in that: include Two vents (11) are connected to the water supply pipe (9) and the return pipe (10) respectively, a primary vent valve (1) is connected to the end of the vent (11), a secondary vent valve (2) is connected to the end of the primary vent valve (1) through a pipe, and a vent hose (4) is connected to the end of the secondary vent valve (2). An operating port (8) is opened on the surface of the wellhead cover (7) and a cover plate (3) is placed on top of the operating port (8).

2. A well chamber exhaust device for a directly buried heating pipeline network according to claim 1, characterized in that: It also includes two winding structures (5) set at the bottom of the cover plate (3), and the top of the exhaust hose (4) is wrapped and stored at the bottom of the cover plate (3) by the winding structures (5).

3. A well chamber exhaust device for a directly buried heating pipeline network according to claim 2, characterized in that: The winding structure (5) includes a winding post (51) fixed to the bottom surface of the cover plate (3) and a circular tray (52) fixed to the bottom surface of the winding post (51).

4. A well chamber exhaust device for a directly buried heating pipeline network according to claim 3, characterized in that: The winding structure (5) also includes a limiting component (53) for pressing and limiting the exhaust hose (4), the limiting component (53) being disposed on one side of the circular tray (52).

5. A well chamber exhaust device for a directly buried heating pipeline network according to claim 4, characterized in that: The limiting component (53) includes a support rod (531) fixed to the side of the circular tray (52), a movable pressure plate (532) movably sleeved on the support rod (531), an end plate (534) fixed to the end surface of the movable pressure plate (532), and a spring (533) sleeved on the surface of the support rod (531) and located between the movable pressure plate (532) and the end plate (534).

6. A well chamber exhaust device for a directly buried heating pipeline network according to claim 5, characterized in that: The top surface of the movable pressure plate (532) is also fixed with an anti-slip pressure block (535), and the anti-slip pressure block (535) is pressed into contact with the exhaust hose (4).

7. A well chamber exhaust device for a directly buried heating pipeline network according to claim 5, characterized in that: The bottom surface of the movable pressure plate (532) is provided with a rod hole (5321) through which the support rod (531) passes.

8. A well chamber exhaust device for a directly buried heating pipeline network according to claim 5, characterized in that: One end of the spring (533) abuts against the side of the movable pressure plate (532), and the other end of the spring (533) abuts against the side of the end plate (534).

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