A gas sampling device for use within a pipeline

Abstract

The utility model relates to gas sampling device technical field, and disclose a kind of for pipeline internal gas sampling device, including being equipped in the gas detection device of pipeline body side, pipeline body one side is equipped with sampling unit, and sampling unit includes the communication pipe of being equipped in the side of pipeline body and extending to the inside of pipeline body, and the side of communication pipe is equipped with a plurality of first air holes, and the one end of communication pipe located outside is inserted and rotationally connected with the rotating pipe extending to the inside of communication pipe, and the side of rotating pipe is provided with a plurality of second air holes, and the sampling tube extending to the inside of rotating pipe is inserted in the one end of rotating pipe. In the utility model, sampling is sampled to the gas detection device in the detection, and the gas detection device is conveniently installed in the side of pipeline body by fixed unit, and the pipeline body is conveniently detected in movable mode, improves the convenience of detection and the gas sampling efficiency in pipeline body.

Description

Technical Field

[0001] This utility model relates to the technical field of gas sampling devices, specifically a gas sampling device for use in pipelines. Background Technology

[0002] In scenarios such as industrial production monitoring, environmental emission detection, and municipal pipeline safety operation and maintenance, it is necessary to sample and analyze the gases (such as harmful gases, combustible gases, and process gases) inside the pipeline to determine whether the pipeline's operating status or pollutant emissions meet the standards.

[0003] A search revealed a patent, CN211179719U, which discloses a pipeline gas sampling and detection device. This device is convenient for detecting pipeline gases, is low-cost, and safe and reliable. It includes a main pipeline with a bypass outlet and a bypass inlet on its side wall. The bypass outlet is connected to one end of a gas detection chamber via an inlet branch pipe, and the bypass inlet is connected to the other end of the gas detection chamber via an outlet branch pipe. An industrial gas detector is mounted on the outer surface of the gas detection chamber with screws. The gas detection chamber has a detection port, and the probe of the industrial gas detector extends into the gas detection chamber through the detection port.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] The aforementioned comparative documents describe a method where a bypass outlet and a bypass inlet are provided on the side of the main pipeline to guide the gas in the main pipeline into a gas detection chamber, and the gas is sampled and detected by an industrial gas detector. However, in reality, to reduce the cost of gas detection in pipelines, some pipelines do not require long-term monitoring; only periodic spot checks of the main pipeline are necessary. In such cases, a mobile gas detection device can be used to sample and detect the gas inside the pipeline. However, the gas detection device in the aforementioned comparative documents is fixed, which is not convenient for mobile detection. Therefore, there is an urgent need in the art to improve the gas sampling device for pipelines to overcome the shortcomings of the prior art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a gas sampling device for pipelines, which improves the efficiency of gas sampling within pipelines and the convenience of detection.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gas sampling device for pipelines, comprising a gas detection device disposed on the side of a pipeline body, a sampling unit disposed on one side of the pipeline body, the sampling unit comprising a connecting pipe disposed on the side of the pipeline body and extending into the pipeline body, the connecting pipe having a plurality of first vent holes on its side, a rotating pipe having one end extending into the connecting pipe inserted into and rotatably connected to the external end of the connecting pipe, the rotating pipe having a plurality of second vent holes adapted to the first vent holes on its side, the rotating pipe having a plurality of elastic sealing strips having a plurality of elasticity capable of completely sealing the plurality of first vent holes on its side, a sampling tube extending into the rotating pipe being inserted into one end of the rotating pipe, a connecting flexible tube being fixedly installed between the sampling tube and the gas detection device, a threaded connector connected to the connecting pipe being rotatably connected to the side of the rotating pipe, a plurality of elastic rings having a plurality of elasticity adapted to the sampling tube being disposed inside the rotating pipe, and a fixing unit for installation being disposed on one side of the gas detection device.

[0008] Preferably, a snap-fit ​​plate is fixedly installed on the outer side of the rotating tube, and a first limiting nut adapted to the threaded connector is threadedly connected to the outer side of the rotating tube, and the threaded connector is threadedly connected to the outer end of the connecting tube.

[0009] Preferably, a rotating ring is fixedly installed on the side of the rotating tube, and a rotating groove adapted to the rotating ring is provided on the inner wall of the threaded connector. An elastic first sealing ring is embedded in the rotating groove.

[0010] Preferably, the snap-fit ​​plate is polygonal in shape, and the side of the snap-fit ​​plate is provided with an indicator mark that is compatible with the elastic sealing strip.

[0011] Preferably, a connector strip is fixedly installed on one side of the elastic sealing strip, and the side of the rotating tube is provided with a plurality of connector grooves that are adapted to the connector strip.

[0012] Preferably, the fixing unit includes a connecting seat fixedly installed on one side of the gas detection device. Two symmetrical clamping frames adapted to the pipe body are provided on one side of the connecting seat. A sliding block is fixedly installed at one end of the clamping frame. A sliding groove adapted to the sliding block is provided on one side of the connecting seat. An adjusting threaded rod extending into the sliding groove passes through the end of the connecting seat. The adjusting threaded rod rotates to drive the two sliding blocks to move synchronously towards each other. A second limiting nut is threadedly connected to the outer side of the adjusting threaded rod.

[0013] Preferably, a connecting ring adapted to the connecting pipe is fixedly installed on the side of the pipe body, and a connecting flange adapted to the connecting ring is fixedly installed on the side of the connecting pipe. The connecting flange is connected to the connecting ring by bolts, and a second sealing ring adapted to the connecting pipe is embedded in the inner wall of the connecting ring.

[0014] To address the shortcomings of existing technologies, this utility model provides a gas sampling device for pipelines, overcoming the deficiencies of the prior art. The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, the sampling tube is inserted into the rotating tube. When the rotating tube is rotated, the elastic sealing strip is misaligned with the first vent hole. The gas in the pipeline passes through the first vent hole and the second vent hole, and is sampled into the gas detection device through the sampling tube for detection. The gas detection device is easy to install on the side of the pipeline through the fixing unit, which facilitates mobile detection of the pipeline and improves the efficiency of gas sampling and the convenience of detection in the pipeline.

[0016] 2. In this utility model, by setting a connector strip to be inserted into the connector groove on the side of the rotating tube, it is convenient to install or replace the elastic sealing strip later.

[0017] 3. In this utility model, by setting several elastic rings, when detecting the gas in the pipeline, the sampling tube is directly inserted into the rotating tube, and the several elastic rings play a sealing role. After sampling is completed, the sampling tube can be directly pulled out, which facilitates sampling of the gas in the pipeline.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of the gas detection device installed on the side of the pipeline body in this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the pipe body in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the present invention, in which the connecting tube, rotating tube, and sampling tube are separated.

[0023] Figure 4 This is a cross-sectional structural diagram of the rotating tube in this utility model;

[0024] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 for Figure 2 Enlarged structural diagram at point B;

[0026] Figure 7 for Figure 3 Enlarged structural diagram at point C;

[0027] Figure 8 for Figure 4 Enlarged structural diagram at point D;

[0028] Figure 9 for Figure 4 Enlarged structural diagram at point E in the middle.

[0029] In the diagram: 1. Pipe body; 2. Gas detection device; 3. Sampling unit; 4. Connecting pipe; 5. First vent; 6. Rotating pipe; 7. Second vent; 8. Elastic sealing strip; 9. Sampling tube; 10. Connecting hose; 11. Elastic ring; 12. Threaded connector; 13. Clip plate; 14. First limit nut; 15. Rotating ring; 16. Rotating groove; 17. First sealing ring; 18. Indicator mark; 19. Insertion strip; 20. Insertion groove; 21. Connecting seat; 22. Clamping frame; 23. Sliding block; 24. Sliding groove; 25. Adjusting threaded rod; 26. Second limit nut; 27. Connecting ring; 28. Connecting flange; 29. ​​Second sealing ring. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] Please see Figures 1-9A gas sampling device for pipelines includes a gas detection device 2 disposed on the side of a pipeline body 1. A sampling unit 3 is provided on one side of the pipeline body 1. The sampling unit 3 includes a connecting pipe 4 disposed on the side of the pipeline body 1 and extending into the pipeline body 1. The connecting pipe 4 has a plurality of first vent holes 5 on its side. A rotating pipe 6, one end of which extends into the connecting pipe 4, is inserted into and rotatably connected to the external end of the connecting pipe 4. The rotating pipe 6 has a plurality of second vent holes 7 adapted to the first vent holes 5 on its side. The rotating pipe 6 has a plurality of elastic sealing strips 8 on its side that are elastic and can completely seal the plurality of first vent holes 5. A sampling tube 9, extending into the rotating pipe 6, is inserted into one end of the rotating pipe 6. A connecting hose 10 is fixedly installed between the sampling tube 9 and the gas detection device 2. The rotating pipe 6 rotates... The rotating tube 6 is connected to a threaded connector 12 that is connected to the connecting tube 4. The rotating tube 6 is provided with several elastic rings 11 that are elastic and adapted to the sampling tube 9. The gas detection device 2 is provided with a fixing unit for installation on one side. A snap-fit ​​plate 13 is fixedly installed on the outer side of the rotating tube 6. A first limiting nut 14 adapted to the threaded connector 12 is threadedly connected to the outer side of the rotating tube 6. The threaded connector 12 is threadedly connected to the outer end of the connecting tube 4. A rotating ring 15 is fixedly installed on the side of the rotating tube 6. A rotating groove 16 adapted to the rotating ring 15 is provided on the inner side wall of the threaded connector 12. An elastic first sealing ring 17 is embedded in the rotating groove 16. The snap-fit ​​plate 13 is polygonal in shape. An indicator mark 18 adapted to the elastic sealing strip 8 is provided on the side of the snap-fit ​​plate 13.

[0033] In this embodiment, the specific implementation is as follows: When it is necessary to sample and detect the gas inside the pipe body 1, the gas detection device 2 is fixedly installed on the side of the pipe body 1 using a fixing unit. The sampling tube 9 is inserted into the rotating tube 6 and inserted between several elastic rings 11. The elastic rings 11 are snapped onto the side of the sampling tube 9 to seal the side of the sampling tube 9. The rotating tube 6 is rotated by snapping the snap plate 13 with a wrench. The position of the elastic sealing strip 8 is identified by the indicator mark 18. Several elastic sealing strips 8 are misaligned with several first vent holes 5. The gas inside the pipe body 1 enters the connecting pipe 4 through the first vent holes 5 and enters the rotating tube 6 through the second vent hole 7 on the side of the rotating tube 6. It flows through the sampling tube 9 to the connecting hose 10 and the gas detection device 2, thus achieving the effect of sampling the gas inside the pipe body 1. After the gas enters the gas detection device 2, the snap plate 13 is rotated in the opposite direction, and several elastic sealing strips 8 seal the connecting pipe 4. The first vent 5 is sealed, and then the gas is detected by the gas detection device 2. The gas detection device 2 is a known prior art device, such as the TY-mAIR12B volatile organic compound detection device, and is equipped with a PID sensor. The sealed sensor provides a good detection environment. The gas detection device 2 is equipped with a fan and a condenser tube, a chemical power source and a main controller. The side of the gas detection device 2 has a human-machine interface for real-time gas detection. After the detection is completed, the sampling tube 9 can be pulled out directly. The gas detection device 2 is removed by the fixing unit and transferred to the lower detection point for continued detection. This facilitates mobile detection of the pipeline body 1, improves the gas sampling efficiency and detection convenience of the pipeline body 1. When the rotating tube 6 is installed, the threaded connector 12 is threaded to one end of the connecting tube 4. When the rotating tube 6 rotates, the rotating ring 15 rotates in the rotating groove 16, and the first sealing ring 17 provides a sealing effect.

[0034] Example 2

[0035] Please see Figure 5 , Figure 6 and Figure 9 This embodiment includes the above embodiment, and further includes: a plug strip 19 is fixedly installed on one side of the elastic sealing strip 8, and a plurality of plug grooves 20 adapted to the plug strip 19 are provided on the side of the rotating tube 6. The elastic sealing strip 8 is inserted into the plug groove 20 through the plug strip 19, which facilitates the installation or later replacement of the elastic sealing strip 8.

[0036] The fixing unit includes a connecting seat 21 fixedly installed on one side of the gas detection device 2. Two symmetrical clamping brackets 22 adapted to the pipe body 1 are provided on one side of the connecting seat 21. A sliding block 23 is fixedly installed at one end of each clamping bracket 22. A sliding groove 24 adapted to the sliding block 23 is provided on one side of the connecting seat 21. An adjusting threaded rod 25 extending into the sliding groove 24 passes through the end of the connecting seat 21. The rotation of the adjusting threaded rod 25 drives the two sliding blocks 23 to move synchronously towards each other. A second limiting nut 26 is threadedly connected to the outer side of the adjusting threaded rod 25. The gas detection device 2 needs to be temporarily... When fixedly installed on the side of the pipe body 1, the two clamping brackets 22 are positioned on opposite sides of the pipe body 1. The adjusting threaded rod 25 is rotated. The threads of the adjusting threaded rod 25 on the inner side of the sliding groove 24 are symmetrical and opposite. When the adjusting threaded rod 25 is rotated, it drives the two sliding blocks 23 to move towards each other in the sliding groove 24. The two sliding blocks 23 drive the two clamping brackets 22 to move towards each other. The two clamping brackets 22 are clamped on the side of the pipe body 1. The adjusting threaded rod 25 and the second limit nut 26 are locked to facilitate the fixation of the gas detection device 2, thereby facilitating the sampling and detection of gas in the pipe body 1.

[0037] A connecting ring 27 adapted to the connecting pipe 4 is fixedly installed on the side of the pipe body 1. A connecting flange 28 adapted to the connecting ring 27 is fixedly installed on the side of the connecting pipe 4. The connecting flange 28 is connected to the connecting ring 27 by bolts. A second sealing ring 29 adapted to the connecting pipe 4 is embedded in the inner wall of the connecting ring 27. The connecting pipe 4 is inserted into the side of the pipe body 1 and is connected to the connecting flange 28 by bolts, and the bolts are threaded to the side of the connecting ring 27. The second sealing ring 29 provides a sealing effect between the connecting pipe 4 and the connecting ring 27, making it easy to install the connecting pipe 4 on the side of the pipe body 1.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas sampling device for pipelines, comprising a gas detection device (2) disposed on the side of the pipeline body (1), characterized in that, A sampling unit (3) is provided on one side of the pipe body (1). The sampling unit (3) includes a connecting pipe (4) located on the side of the pipe body (1) and extending into the interior of the pipe body (1). The connecting pipe (4) has several first vent holes (5) on its side. One end of the connecting pipe (4) is inserted into and rotatably connected to a rotating pipe (6) extending into the connecting pipe (4). The rotating pipe (6) has several second vent holes (7) on its side that are adapted to the first vent holes (5). The rotating pipe (6) also has several flexible vent holes (7) on its side that can be completely vented. The rotating tube (6) is fully sealed with an elastic sealing strip (8) for several first vent holes (5). One end of the rotating tube (6) is inserted with a sampling tube (9) extending into the rotating tube (6). A connecting hose (10) is fixedly installed between the sampling tube (9) and the gas detection device (2). A threaded connector (12) connected to the connecting tube (4) is rotatably connected to the side of the rotating tube (6). Several elastic rings (11) that are elastic and adapted to the sampling tube (9) are provided inside the rotating tube (6). A fixing unit for installation is provided on one side of the gas detection device (2).

2. The gas sampling device for pipelines according to claim 1, characterized in that, A snap-fit ​​plate (13) is fixedly installed on one side of the rotating tube (6) located on the outside. A first limiting nut (14) adapted to the threaded connector (12) is threadedly connected to one side of the rotating tube (6) located on the outside. The threaded connector (12) is threadedly connected to one side of the connecting tube (4) located on the outside.

3. A gas sampling device for pipelines according to claim 1, characterized in that, A rotating ring (15) is fixedly installed on the side of the rotating tube (6), and a rotating groove (16) adapted to the rotating ring (15) is provided on the inner wall of the threaded connector (12). A first sealing ring (17) with elasticity is embedded in the rotating groove (16).

4. A gas sampling device for pipelines according to claim 2, characterized in that, The snap-fit ​​plate (13) is polygonal in shape, and the side of the snap-fit ​​plate (13) is provided with an indicator mark (18) that is compatible with the elastic sealing strip (8).

5. A gas sampling device for pipelines according to claim 1, characterized in that, A plug strip (19) is fixedly installed on one side of the elastic sealing strip (8), and a number of plug grooves (20) adapted to the plug strip (19) are provided on the side of the rotating tube (6).

6. A gas sampling device for pipelines according to claim 1, characterized in that, The fixing unit includes a connecting seat (21) fixedly installed on one side of the gas detection device (2). The connecting seat (21) has two symmetrical clamping frames (22) adapted to the pipe body (1) on one side. A sliding block (23) is fixedly installed at one end of the clamping frame (22). A sliding groove (24) adapted to the sliding block (23) is provided on one side of the connecting seat (21). An adjusting threaded rod (25) extending into the sliding groove (24) passes through the end of the connecting seat (21). The adjusting threaded rod (25) rotates to drive the two sliding blocks (23) to move synchronously towards each other. A second limiting nut (26) is threadedly connected to the outer side of the adjusting threaded rod (25).

7. A gas sampling device for pipelines according to claim 1, characterized in that, A connecting ring (27) adapted to the connecting pipe (4) is fixedly installed on the side of the pipe body (1). A connecting flange (28) adapted to the connecting ring (27) is fixedly installed on the side of the connecting pipe (4). The connecting flange (28) is connected to the connecting ring (27) by bolts. A second sealing ring (29) adapted to the connecting pipe (4) is embedded in the inner wall of the connecting ring (27).

Images