Gas leakage detection device for urban gas buried pipeline

Abstract

The utility model discloses a gas leakage detection device for an urban gas buried pipeline, which comprises a gas pipe, a connecting flange is arranged on the outer surface of the gas pipe, a lower shield is arranged on the outer surface of the gas pipe, a fixed seat is fixedly connected to the rear surface of the lower shield, and a rotating shaft is fixedly connected to the inner surface of the fixed seat. By arranging a lower protective cover, an upper protective cover, a first sealing ring, a first sealing gasket, a second sealing gasket, a third sealing gasket and a fourth sealing gasket, a connecting flange on a gas pipe can be located in a sealed space, so that the situation that leakage detection is inconvenient due to the fact that gas is rapidly evacuated in air is avoided; the gas leakage prevention device is simple in structure and convenient to use, leaked gas can be trapped in the sealed space, so that the possibility of gas overflow is reduced, the box body formed by the lower protective cover and the upper protective cover can be conveniently mounted and dismounted by arranging the fixing base, the rotating shaft, the overturning base, the buckle base and the fixing assembly, tools are not needed, and the using effect is better.

Description

Technical Field

[0001] This utility model relates to the technical field of gas leak detection devices, and in particular to a gas leak detection device for buried gas pipelines in urban areas. Background Technology

[0002] With the rapid development of urbanization in my country, the scale of urban gas pipeline construction has been continuously expanding, and gas pipelines have become an important part of urban energy supply. However, during long-term use, gas pipelines are prone to leaks due to aging, corrosion, and external damage, especially at flange connections where the possibility of leaks is higher. Therefore, workers usually use gas leak detectors regularly to check for gas leaks at flange connections.

[0003] However, existing gas leak detection devices still have certain shortcomings. For example, the detection probe of the device needs to be placed at the gas leak location at all times. However, the gas pipe is usually exposed during detection. Once the gas leaks, it will directly disperse into the air and cannot be detected by the detection probe well, resulting in poor actual performance. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a gas leak detection device for buried gas pipelines in urban areas. This device can keep the connecting flange on the gas pipe inside a sealed space, thereby avoiding the situation where it is inconvenient to detect leaks due to the rapid dissipation of gas in the air. It can also trap the leaked gas inside the sealed space, thereby reducing the possibility of gas overflow.

[0005] This utility model also provides a gas leak detection device for buried urban gas pipelines, comprising:

[0006] A gas pipe has a connecting flange on its outer surface and a lower protective cover. A fixing seat is fixedly connected to the rear surface of the lower protective cover. A rotating shaft is fixedly connected to the inner surface of the fixing seat. A flip seat is rotatably connected to the outer surface of the rotating shaft. An upper protective cover is fixedly connected to the front surface of the flip seat. A gas leak detector is fixedly connected to the upper surface of the upper protective cover. A connecting pipe is provided at the output end of the gas leak detector. A detection probe is provided at the end of the connecting pipe away from the gas leak detector. A first sealing ring is provided between the lower protective cover and the rotating shaft. A first sealing gasket is provided on the inner surface of the lower protective cover. A second sealing gasket is provided on the inner surface of the upper protective cover. A third sealing gasket is provided on the inner surface of the lower protective cover. A fourth sealing gasket is provided on the inner surface of the upper protective cover. A snap-fit ​​seat is fixedly connected to the front surface of the upper protective cover.

[0007] A fixing assembly includes a fixing box, a sliding rod, a pressure plate, a limiting ring, a first spring, a U-shaped inclined block, a triangular block, a second spring, and a U-shaped insert. The inner surface of the fixing box is slidably connected to the sliding rod, the lower end of the sliding rod is fixedly connected to the pressure plate, the upper surface of the limiting ring is fixedly connected to the first spring, the outer surface of the U-shaped inclined block is slidably connected to the triangular block, the inner surface of the fixing box is fixedly connected to the second spring, and the upper surface of the triangular block is fixedly connected to the U-shaped insert.

[0008] According to the aforementioned gas leak detection device for buried urban gas pipelines, the side surface of the buckle seat is provided with an insertion hole, and the inner surface of the insertion hole is adapted to the U-shaped insertion block to facilitate the closure of the upper protective cover.

[0009] According to the aforementioned gas leak detection device for buried urban gas pipelines, the end of the connecting pipe furthest from the gas leak detector extends into the interior of the upper protective cover, and the detection probe is located inside the upper protective cover, which facilitates the detection of gas leaks at the connecting flange.

[0010] According to the aforementioned gas leak detection device for buried urban gas pipelines, the end of the first sealing gasket contacts the second sealing gasket, and the end of the third sealing gasket contacts the fourth sealing gasket, which is used to improve the sealing performance at the interface between the upper and lower protective covers.

[0011] According to the aforementioned gas leak detection device for buried urban gas pipelines, the front surface of the lower protective cover is fixedly connected to the fixing box, and the lower surface of the limiting ring is in contact with the fixing box.

[0012] According to the aforementioned gas leak detection device for buried urban gas pipelines, the outer surface of the slide rod is fixedly connected to the limiting ring, and the first spring is slidably sleeved on the outer surface of the slide rod.

[0013] According to the aforementioned gas leak detection device for buried urban gas pipelines, the end of the first spring away from the limiting ring is fixedly connected to the fixed box, and the upper end of the slide rod is fixedly connected to the U-shaped inclined block.

[0014] According to the aforementioned gas leak detection device for buried urban gas pipelines, the side surface of the triangular block is fixedly connected to the second spring, the outer surface of the U-shaped insert is slidably connected to the fixing box, and the gas leak detector is electrically connected to an external power source.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting a lower cover, an upper cover, a first sealing ring, a first sealing gasket, a second sealing gasket, a third sealing gasket, and a fourth sealing gasket, the connecting flange on the gas pipe can be placed inside the sealed space, thereby avoiding the situation where it is inconvenient to detect leaks due to the rapid dissipation of gas in the air, and trapping the leaked gas inside the sealed space, thereby reducing the possibility of gas overflow.

[0017] 2. By setting up a fixed base, a rotating shaft, a flip base, a snap-on base, and a fixing component, the box formed by the lower and upper protective covers can be easily installed and removed without the need for tools, resulting in better performance.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is a schematic diagram of the overall structure of a gas leak detection device for buried urban gas pipelines according to the present invention.

[0021] Figure 2 This is a schematic diagram of the back of the overall structure of the gas leak detection device for buried urban gas pipelines according to this utility model;

[0022] Figure 3 This is a cross-sectional view of the overall structure of a gas leak detection device for buried urban gas pipelines according to this utility model;

[0023] Figure 4 This is a cross-sectional view of the internal structure of a gas leak detection device for buried urban gas pipelines according to this utility model.

[0024] Legend:

[0025] 1. Gas pipe; 2. Connecting flange; 3. Lower cover; 4. Fixing seat; 5. Rotating shaft; 6. Flip seat; 7. Upper cover; 8. Gas leak detector; 9. Connecting pipe; 10. Detection probe; 11. First sealing ring; 12. First sealing gasket; 13. Second sealing gasket; 14. Third sealing gasket; 15. Fourth sealing gasket; 16. Snap-fit ​​seat; 17. Insertion hole; 18. Fixing assembly; 19. Fixing box; 20. Slide rod; 21. Pressure plate; 22. Limiting ring; 23. First spring; 24. U-shaped inclined block; 25. Triangular block; 26. Second spring; 27. U-shaped insert block. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] Reference Figure 1-4 This utility model discloses a gas leak detection device for buried urban gas pipelines, comprising: a gas pipe 1, a connecting flange 2 on the outer surface of the gas pipe 1, a lower protective cover 3 on the outer surface of the gas pipe 1, a fixed base 4 fixedly connected to the rear surface of the lower protective cover 3, a rotating shaft 5 fixedly connected to the inner surface of the fixed base 4, a flipping base 6 rotatably connected to the outer surface of the rotating shaft 5, an upper protective cover 7 fixedly connected to the front surface of the flipping base 6, a gas leak detector 8 fixedly connected to the upper surface of the upper protective cover 7, a connecting pipe 9 at the output end of the gas leak detector 8, a detection probe 10 at the end of the connecting pipe 9 away from the gas leak detector 8, and a first... A sealing ring 11 is provided. The inner surface of the lower cover 3 is provided with a first sealing gasket 12, the inner surface of the upper cover 7 is provided with a second sealing gasket 13, the inner surface of the lower cover 3 is provided with a third sealing gasket 14, the inner surface of the upper cover 7 is provided with a fourth sealing gasket 15, the front surface of the upper cover 7 is fixedly connected with a buckle seat 16, the side surface of the buckle seat 16 is provided with an insertion hole 17, the end of the connecting pipe 9 away from the gas leak detector 8 extends into the interior of the upper cover 7, the detection probe 10 is located inside the upper cover 7, the end of the first sealing gasket 12 is in contact with the second sealing gasket 13, the end of the third sealing gasket 14 is in contact with the fourth sealing gasket 15, and the gas leak detector 8 is electrically connected to an external power supply.

[0028] The fixing assembly 18 includes a fixing box 19, a slide rod 20, a pressure plate 21, a limiting ring 22, a first spring 23, a U-shaped inclined block 24, a triangular block 25, a second spring 26, and a U-shaped insert 27. The inner surface of the fixing box 19 is slidably connected to the slide rod 20, the lower end of the slide rod 20 is fixedly connected to the pressure plate 21, the upper surface of the limiting ring 22 is fixedly connected to the first spring 23, the outer surface of the U-shaped inclined block 24 is slidably connected to the triangular block 25, the inner surface of the fixing box 19 is fixedly connected to the second spring 26, and the upper surface of the triangular block 25 is fixedly connected to the U-shaped insert 27. The inner surface of the socket 17 is adapted to the U-shaped plug 27, the front surface of the lower cover 3 is fixedly connected to the fixing box 19, the lower surface of the limiting ring 22 is in contact with the fixing box 19, the outer surface of the slide rod 20 is fixedly connected to the limiting ring 22, the first spring 23 is slidably sleeved on the outer surface of the slide rod 20, the end of the first spring 23 away from the limiting ring 22 is fixedly connected to the fixing box 19, the upper end of the slide rod 20 is fixedly connected to the U-shaped inclined block 24, the side surface of the triangular block 25 is fixedly connected to the second spring 26, and the outer surface of the U-shaped plug 27 is slidably connected to the fixing box 19.

[0029] Working principle: In use, press the pressure plate 21 on the fixing assembly 18 upwards, driving the slide rod 20 to slide the U-shaped inclined block 24 along the inclined surface on the triangular block 25, and compressing the first spring 23 and the second spring 26. This allows the U-shaped inserts 27 on both sides to disengage from the insertion holes 17, thereby releasing the restriction on the buckle seat 16. Then, use the rotating shaft 5 to flip and open the upper cover 7, and then put the lower cover 3 on the outside of the connecting flange 2. Then, flip the upper cover 7 around the rotating shaft 5 again. When the insertion holes 17 on both sides of the buckle seat 16 correspond to the U-shaped inserts 27, release the pressure plate 21. Under the rebound force of the first spring 23 and the second spring 26, the U-shaped inserts 27 will automatically snap into the insertion holes 17, thus completing the connection between the upper cover 7 and the lower cover 3. The gas pipe is closed, and then the interface between the lower cover 3 and the upper cover 7 is sealed by the first sealing ring 11, the first sealing gasket 12, the second sealing gasket 13, the third sealing gasket 14, and the fourth sealing gasket 15. This places the connecting flange 2 on the gas pipe 1 in the sealed space formed by the lower cover 3 and the upper cover 7. Then, the external power supply is turned on, and the gas leak detector 8 is started. The gas leak is detected inside the sealed space formed by the lower cover 3 and the upper cover 7 through the connecting pipe 9 and the detection probe 10. When there is a gas leak at the connecting flange 2 on the gas pipe 1, the gas will first leak into the sealed space formed by the lower cover 3 and the upper cover 7, thereby reducing the possibility of gas overflow and avoiding the situation where it is inconvenient to detect leaks due to the rapid dissipation of gas into the air.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A gas leak detection device for buried urban gas pipelines, characterized in that, include: A gas pipe (1) is provided with a connecting flange (2) on its outer surface. A lower protective cover (3) is provided on the outer surface of the gas pipe (1). A fixed seat (4) is fixedly connected to the rear surface of the lower protective cover (3). A rotating shaft (5) is fixedly connected to the inner surface of the fixed seat (4). A flip seat (6) is rotatably connected to the outer surface of the rotating shaft (5). An upper protective cover (7) is fixedly connected to the front surface of the flip seat (6). A gas leak detector (8) is fixedly connected to the upper surface of the upper protective cover (7). The output end of the gas leak detector (8) is provided with a connecting flange (2). The connecting pipe (9) is provided with a detection probe (10) at one end of the connecting pipe (9) away from the gas leak detector (8). A first sealing ring (11) is provided between the lower cover (3) and the rotating shaft (5). A first sealing gasket (12) is provided on the inner surface of the lower cover (3). A second sealing gasket (13) is provided on the inner surface of the upper cover (7). A third sealing gasket (14) is provided on the inner surface of the lower cover (3). A fourth sealing gasket (15) is provided on the inner surface of the upper cover (7). A buckle seat (16) is fixedly connected to the front surface of the upper cover (7). The fixing component (18) includes a fixing box (19), a slide rod (20), a pressure plate (21), a limiting ring (22), a first spring (23), a U-shaped inclined block (24), a triangular block (25), a second spring (26), and a U-shaped insert (27). The inner surface of the fixing box (19) is slidably connected to the slide rod (20), the lower end of the slide rod (20) is fixedly connected to the pressure plate (21), the upper surface of the limiting ring (22) is fixedly connected to the first spring (23), the outer surface of the U-shaped inclined block (24) is slidably connected to the triangular block (25), the inner surface of the fixing box (19) is fixedly connected to the second spring (26), and the upper surface of the triangular block (25) is fixedly connected to the U-shaped insert (27).

2. The gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The side surface of the buckle seat (16) is provided with a socket (17), and the inner surface of the socket (17) is adapted to the U-shaped plug (27).

3. The gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The end of the connecting pipe (9) away from the gas leak detector (8) extends into the interior of the upper cover (7), and the detection probe (10) is located inside the upper cover (7).

4. A gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The end of the first sealing gasket (12) is in contact with the second sealing gasket (13), and the end of the third sealing gasket (14) is in contact with the fourth sealing gasket (15).

5. A gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The front surface of the lower cover (3) is fixedly connected to the fixed box (19), and the lower surface of the limiting ring (22) is in contact with the fixed box (19).

6. A gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The outer surface of the slide rod (20) is fixedly connected to the limiting ring (22), and the first spring (23) is slidably sleeved on the outer surface of the slide rod (20).

7. A gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The end of the first spring (23) away from the limiting ring (22) is fixedly connected to the fixed box (19), and the upper end of the slide rod (20) is fixedly connected to the U-shaped inclined block (24).

8. A gas leak detection device for buried urban gas pipelines according to claim 1, characterized in that, The side surface of the triangular block (25) is fixedly connected to the second spring (26), the outer surface of the U-shaped insert (27) is slidably connected to the fixed box (19), and the gas leak detector (8) is electrically connected to an external power source.

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