A novel flexible gas sampling head

Abstract

This utility model discloses a novel flexible gas sampling head, relating to the field of gas sampling technology. The novel flexible gas sampling head includes a handle, a connector threaded to the inner wall of the handle, an outlet pipe inserted into the inner wall of the connector, the outer wall of the outlet pipe fixedly connected to the inner wall of the handle, a sealing block fixedly connected to the inner wall of the connector, the inner wall of the sealing block threadedly connected to the outer wall of the outlet pipe, a fixing frame threadedly connected to the outer wall of the connector, and a connecting pipe fixedly connected to the inner wall of the fixing frame. This utility model, through its sampling mechanism, achieves convenient sampling in complex environments. During sampling, the universal joint designed in the sampling mechanism allows the sampling pipe to be twisted in any direction, thereby facilitating sampling of leak points.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, specifically a novel flexible gas sampling head. Background Technology

[0002] Currently, the primary leak detection method in the petrochemical industry is LDAD (Low-Low Gas Detection and Analysis) technology. This method involves personnel carrying a portable gas analyzer and using its sampling device to take samples from valves, flanges, connectors, and open pipe sections in the pipeline for analysis. This technology is widely used in petrochemical enterprises, natural gas transmission and storage, and city gas industries. However, due to the complex structures of these components, such as various irregularly shaped valves, flanges, and pipeline joints, gas sampling is significantly affected. Furthermore, while the sampling head of the device is generally fixed, the complex structure of the components in actual testing conditions makes it difficult to accurately locate the leak when it is behind an obstruction or other interference, thus interfering with the analysis results.

[0003] Based on this, a new type of flexible gas sampling head is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0004] The purpose of this invention is to provide a novel flexible gas sampling head to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel flexible gas sampling head includes a handle, a connector threaded to the inner wall of the handle, an outlet tube inserted into the inner wall of the connector, an outer wall of the outlet tube fixedly connected to the inner wall of the handle, a sealing block fixedly connected to the inner wall of the connector, an inner wall of the sealing block threadedly connected to the outer wall of the outlet tube, a fixing frame threadedly connected to the outer wall of the connector, a connecting tube fixedly connected to the inner wall of the fixing frame, one end of the connecting tube fixedly connected to the outer wall of the sealing block, and the outlet tube and the connecting tube communicating with each other, a fixing mechanism provided on the outer wall of the fixing frame, and a sampling mechanism provided on the inner wall of the fixing frame.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0008] Preferably, the fixing mechanism includes a fixing ring, the inner wall of the fixing ring is fixedly connected to the outer wall of the fixing frame, a connecting frame is fixedly connected to the outer wall of the fixing ring, a rotating shaft is rotatably connected to the inner wall of the connecting frame, a gear is fixedly connected to the outer wall of the rotating shaft, a first spring is fixedly connected to the inner wall of the rotating shaft, a sliding rod is fixedly connected to the end of the first spring, and the outer wall of the sliding rod is slidably connected to the inner wall of the rotating shaft.

[0009] Preferably, a pull plate is fixedly connected to the end of the slide rod, and positioning rods are evenly distributed on the outer wall of the pull plate. The outer wall of the positioning rods is inserted into the inner wall of the connecting frame.

[0010] Preferably, the slide bar is T-shaped, consisting of a rectangular block and a cylinder, and the inner wall of the rotating shaft has a groove that matches the rectangular block.

[0011] Preferably, the bottom of the gear is engaged with a gear ring, the outer wall of the gear ring is fixedly connected to a limiting ring, the outer wall of the limiting ring is slidably connected to the inner wall of the fixed ring, the inner side wall of the gear ring is symmetrically fixedly connected to a protrusion, the outer wall of the protrusion contacts a limiting rod, the outer wall of the limiting rod is inserted into the inner wall of the fixed frame, and a second spring is sleeved on the outer wall of the limiting rod, one end of the second spring is fixedly connected to the outer wall of the limiting rod, and the other end is fixedly connected to the outer wall of the fixed frame.

[0012] Preferably, the sampling mechanism includes a first steering knuckle, the outer wall of the first steering knuckle being inserted into the inner wall of the fixed frame, a slot on the outer wall of the first steering knuckle being inserted into the outer wall of the limiting rod, the inner wall of the first steering knuckle being inserted into the outer wall of the connecting tube, a second steering knuckle being movably connected to the outer wall of the first steering knuckle, and a rubber tube being fixedly connected to the inner walls of the first and second steering knuckles. The rubber tube is made of polytetrafluoroethylene, and the inner wall of the rubber tube is inserted into the outer wall of the connecting tube. A sample suction tube connector is movably connected to the outer wall of the second steering knuckle.

[0013] Preferably, a metal inner liner is fixedly connected to the inner wall of the sampling tube connector, the outer wall of the metal inner liner is fixedly connected to the inner wall of the rubber tube, and a sampling tube is fixedly connected to the end of the sampling tube connector, with the inner wall of the sampling tube inserted into the outer wall of the metal inner liner.

[0014] Preferably, a sealing ring is fixedly connected to the outer wall of the sample suction tube connector, and the outer wall of the sealing ring is in contact with the inner wall of the adjacent component.

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

[0016] 1. This utility model achieves the effect of conveniently replacing the sampling mechanism through the fixing mechanism. Before sampling, the sampling mechanism can be replaced as needed. By removing the restriction between the fixing frame and the sampling mechanism by the fixing mechanism, the sampling mechanism can be removed and replaced, making the replaced sampling mechanism more suitable for the current environment, and thus making the sampling operation more convenient.

[0017] 2. This utility model achieves the effect of convenient sampling in complex environments through the sampling mechanism. During sampling, the universal joint designed in the sampling mechanism allows the sampling tube to be twisted in any direction, thereby facilitating the sampling mechanism to sample the leak point. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model.

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] Figure 5 This is a schematic diagram of the sampling mechanism of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the steering knuckle of this utility model.

[0024] Figure reference numerals: 1. Handle; 11. Connector; 12. Air outlet pipe; 13. Sealing block; 14. Fixing frame; 15. Connecting pipe; 2. Fixing mechanism; 201. Fixing ring; 202. Connecting frame; 203. Pull plate; 204. Gear; 205. Positioning rod; 206. Slide rod; 207. First spring; 208. Rotating shaft; 209. Gear ring; 210. Limiting ring; 211. Protrusion; 212. Limiting rod; 213. Second spring; 3. Sampling mechanism; 301. First steering knuckle; 302. Second steering knuckle; 303. PTFE hose; 304. Sampling tube connector; 305. Metal inner liner tube; 306. Sealing ring; 307. Sampling tube. Detailed Implementation

[0025] 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.

[0026] In one embodiment, such as Figures 1-5As shown, a novel flexible gas sampling head includes a handle 1, a connector 11 threadedly connected to the inner wall of the handle 1, an outlet pipe 12 inserted into the inner wall of the connector 11, the outer wall of the outlet pipe 12 fixedly connected to the inner wall of the handle 1, a sealing block 13 fixedly connected to the inner wall of the connector 11, the inner wall of the sealing block 13 threadedly connected to the outer wall of the outlet pipe 12, a fixing frame 14 threadedly connected to the outer wall of the connector 11, a connecting pipe 15 fixedly connected to the inner wall of the fixing frame 14, one end of the connecting pipe 15 fixedly connected to the outer wall of the sealing block 13, and the outlet pipe 12 and the connecting pipe 15 are connected in communication, a fixing mechanism 2 is provided on the outer wall of the fixing frame 14, and a sampling mechanism 3 is provided on the inner wall of the fixing frame 14.

[0027] In this embodiment, as summarized above, the air outlet pipe 12 and the sampling mechanism 3 can be used to sample parts with complex environments. Furthermore, the sampling mechanism 3 can be replaced by the fixing mechanism 2, allowing the device to be adapted to different environments by changing the sampling mechanism 3.

[0028] In an optional embodiment, such as Figures 2-4 As shown, the fixing mechanism 2 includes a fixing ring 201. The inner wall of the fixing ring 201 is fixedly connected to the outer wall of the fixing frame 14. A connecting frame 202 is fixedly connected to the outer wall of the fixing ring 201. A rotating shaft 208 is rotatably connected to the inner wall of the connecting frame 202. A gear 204 is fixedly connected to the outer wall of the rotating shaft 208. A first spring 207 is fixedly connected to the inner wall of the rotating shaft 208. A sliding rod 206 is fixedly connected to the end of the first spring 207. The outer wall of the sliding rod 206 is slidably connected to the inner wall of the rotating shaft 208. By pulling the pull plate 203, the sliding rod 206 is driven to slide on the inner wall of the rotating shaft 208, causing the first spring 207 to extend. This causes the outer wall of the positioning rod 205 to no longer be inserted into the inner wall of the connecting frame 202, after which the gear 204 can be rotated.

[0029] In an optional embodiment, such as Figures 2-4 As shown, a pull plate 203 is fixedly connected to the end of the slide rod 206. Positioning rods 205 are evenly distributed on the outer wall of the pull plate 203. The outer wall of the positioning rod 205 is inserted into the inner wall of the connecting frame 202. When the outer wall of the positioning rod 205 is inserted into the positioning block opened on the outer wall of the connecting frame 202, the pull plate 203 and the slide rod 206 are locked and cannot be rotated.

[0030] In an optional embodiment, such as Figures 2-4 As shown, the slide bar 206 is T-shaped, consisting of a rectangular block and a cylinder, and the inner wall of the rotating shaft 208 is provided with a groove that matches the rectangular block, so that when the gear 204 is rotated, the slide bar 206 needs to be driven to rotate synchronously.

[0031] In an optional embodiment, such as Figure 2 and Figure 3As shown, a gear ring 209 meshes with the bottom of gear 204. A limiting ring 210 is fixedly connected to the outer wall of gear ring 209. The outer wall of limiting ring 210 is slidably connected to the inner wall of fixed ring 201. Protrusions 211 are symmetrically fixedly connected to the inner side wall of gear ring 209. The outer wall of protrusion 211 contacts limiting rod 212. The outer wall of limiting rod 212 is inserted into the inner wall of fixed frame 14. A second spring 213 is sleeved on the outer wall of limiting rod 212. One end of the second spring 213 is fixedly connected to the outer wall of limiting rod 212, and the other end is fixedly connected to... The outer wall of the fixed frame 14 is fixedly connected. The gear 204 is rotated so that the gear 204 meshes with the gear ring 209. The gear ring 209 drives the limiting ring 210 to rotate synchronously. The limiting ring 210 limits and guides the gear ring 209. At the same time, the gear ring 209 drives the protrusion 211 to rotate, so that the outer wall of the protrusion 211 gradually moves away from the limiting rod 212. Meanwhile, under the action of the second spring 213, the limiting rod 212 gradually moves out from the inner wall of the first steering knuckle 301, thereby removing the restriction between the first steering knuckle 301 and the fixed frame 14.

[0032] In an optional embodiment, such as Figure 2 , Figure 5 and Figure 6 As shown, the sampling mechanism 3 includes a first steering knuckle 301. The outer wall of the first steering knuckle 301 is inserted into the inner wall of the fixed frame 14. A slot on the outer wall of the first steering knuckle 301 is inserted into the outer wall of the limiting rod 212. The inner wall of the first steering knuckle 301 is inserted into the outer wall of the connecting pipe 15. A second steering knuckle 302 is movably connected to the outer wall of the first steering knuckle 301. A rubber tube 303, made of polytetrafluoroethylene, is fixedly connected to the inner walls of the first steering knuckle 301 and the second steering knuckle 302. The inner wall of the rubber tube 303 is inserted into the outer wall of the connecting pipe 15. A sampling tube connector 304 is movably connected to the outer wall of the second steering knuckle 302. A sealing ring 306 is fixedly connected to the outer wall of the sampling tube connector 304. The outer wall of the sealing ring 306 is connected to the outer wall of the connecting pipe 15. Contact the inner wall of the adjacent component, hold the handle 1, and then extend the sampling tube 307 to the location where leak detection is needed. During the leak detection process, the connection between the first steering knuckle 301 and the second steering knuckle 302 can be rotated as needed to change the position of the sampling tube 307. Through the rubber tube 303 in the first steering knuckle 301 and the second steering knuckle 302, in conjunction with the metal inner liner tube 305 and the sealing ring 306, air leakage can be avoided when changing the position of the sampling tube 307. When the sampling tube 307 reaches the appropriate position, if there is a gas leak, the gas enters the sampling tube 307, passes through the suction tube connector 304, the rubber tube 303 and the connecting tube 15, and is finally discharged through the gas outlet tube 12, thus completing the sampling.

[0033] In an optional embodiment, such as Figure 2 and Figure 5As shown, a metal inner liner tube 305 is fixedly connected to the inner wall of the sampling tube connector 304. The outer wall of the metal inner liner tube 305 is fixedly connected to the inner wall of the rubber tube 303. A sampling tube 307 is fixedly connected to the end of the sampling tube connector 304. The inner wall of the sampling tube 307 is inserted into the outer wall of the metal inner liner tube 305. The sampling tube 307 is connected to the metal inner liner tube 305, so that the shape of the sampling head is fixed and will not change shape with the rotation of the first steering knuckle 301 and the second steering knuckle 302, thereby ensuring the stability during the sampling process.

[0034] The above embodiment discloses a novel flexible gas sampling head. In use, the handle 1 is held by hand, and the sampling tube 307 is extended to the location where leak detection is needed. During leak detection, the connection between the first steering knuckle 301 and the second steering knuckle 302 can be rotated as needed to change the position of the sampling tube 307. The rubber tube 303 inside the first and second steering knuckles 301, along with the metal inner liner 305 and the sealing ring 306, prevents air leakage when changing the position of the sampling tube 307. When the sampling tube 307 reaches the appropriate position, if there is a gas leak, the gas enters the sampling tube 307, passes through the suction tube connector 304, the rubber tube 303, and the connecting tube 15, and is finally discharged through the outlet tube 12, thus completing the sampling. Furthermore, different sampling mechanisms 3 can be replaced as needed before testing by pulling... The movable pull plate 203 drives the slide rod 206 to slide on the inner wall of the rotating shaft 208, causing the first spring 207 to extend and the outer wall of the positioning rod 205 to no longer be inserted into the inner wall of the connecting frame 202. Then the gear 204 can be rotated, causing the gear 204 to mesh with the gear ring 209, driving the protrusion 211 to rotate, causing the outer wall of the protrusion 211 to gradually move away from the limiting rod 212. At the same time, under the action of the second spring 213, the limiting rod 212 gradually moves out from the inner wall of the first steering knuckle 301, thereby removing the restriction between the first steering knuckle 301 and the fixed frame 14. Then the first steering knuckle 301 can be removed and replaced with a sampling mechanism 3 adapted to the current environment. In summary, through the air outlet pipe 12 and the sampling mechanism 3, sampling can be performed on parts with relatively complex environments. Furthermore, through the fixing mechanism 2, the sampling mechanism 3 can be replaced, allowing the device to be replaced with a suitable sampling mechanism 3 according to different environments.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A novel flexible gas sampling head, comprising a handle (1), wherein a connector (11) is threadedly connected to the inner wall of the handle (1), and an outlet pipe (12) is inserted into the inner wall of the connector (11), wherein the outer wall of the outlet pipe (12) is fixedly connected to the inner wall of the handle (1), characterized in that, A sealing block (13) is fixedly connected to the inner wall of the connector (11). The inner wall of the sealing block (13) is threadedly connected to the outer wall of the air outlet pipe (12). A fixing frame (14) is threadedly connected to the outer wall of the connector (11). A connecting pipe (15) is fixedly connected to the inner wall of the fixing frame (14). One end of the connecting pipe (15) is fixedly connected to the outer wall of the sealing block (13), and the air outlet pipe (12) and the connecting pipe (15) are connected. A fixing mechanism (2) is provided on the outer wall of the fixing frame (14), and a sampling mechanism (3) is provided on the inner wall of the fixing frame (14).

2. The novel flexible gas sampling head according to claim 1, characterized in that, The fixing mechanism (2) includes a fixing ring (201), the inner wall of the fixing ring (201) is fixedly connected to the outer wall of the fixing frame (14), the outer wall of the fixing ring (201) is fixedly connected to a connecting frame (202), the inner wall of the connecting frame (202) is rotatably connected to a rotating shaft (208), the outer wall of the rotating shaft (208) is fixedly connected to a gear (204), the inner wall of the rotating shaft (208) is fixedly connected to a first spring (207), the end of the first spring (207) is fixedly connected to a sliding rod (206), and the outer wall of the sliding rod (206) is slidably connected to the inner wall of the rotating shaft (208).

3. A novel flexible gas sampling head according to claim 2, characterized in that, The end of the slide bar (206) is fixedly connected to a pull plate (203), and the outer wall of the pull plate (203) is evenly distributed with positioning rods (205), and the outer wall of the positioning rods (205) is inserted into the inner wall of the connecting frame (202).

4. A novel flexible gas sampling head according to claim 2, characterized in that, The slide bar (206) is T-shaped, consisting of a rectangular block and a cylinder, and the inner wall of the rotating shaft (208) is provided with a groove that matches the rectangular block.

5. A novel flexible gas sampling head according to claim 2, characterized in that, The bottom of the gear (204) is engaged with a gear ring (209). A limiting ring (210) is fixedly connected to the outer wall of the gear ring (209). The outer wall of the limiting ring (210) is slidably connected to the inner wall of the fixed ring (201). A protrusion (211) is symmetrically fixedly connected to the inner side wall of the gear ring (209). The outer wall of the protrusion (211) contacts a limiting rod (212). The outer wall of the limiting rod (212) is inserted into the inner wall of the fixed frame (14). A second spring (213) is sleeved on the outer wall of the limiting rod (212). One end of the second spring (213) is fixedly connected to the outer wall of the limiting rod (212), and the other end is fixedly connected to the outer wall of the fixed frame (14).

6. A novel flexible gas sampling head according to claim 1, characterized in that, The sampling mechanism (3) includes a first steering knuckle (301), the outer wall of the first steering knuckle (301) is inserted into the inner wall of the fixed frame (14), the slot opened on the outer wall of the first steering knuckle (301) is inserted into the outer wall of the limiting rod (212), the inner wall of the first steering knuckle (301) is inserted into the outer wall of the connecting pipe (15), the outer wall of the first steering knuckle (301) is movably connected to a second steering knuckle (302), the inner walls of the first steering knuckle (301) and the second steering knuckle (302) are fixedly connected to a rubber tube (303), the rubber tube (303) is made of polytetrafluoroethylene, the inner wall of the rubber tube (303) is inserted into the outer wall of the connecting pipe (15), and the outer wall of the second steering knuckle (302) is movably connected to a sampling tube connector (304).

7. A novel flexible gas sampling head according to claim 6, characterized in that, The inner wall of the sampling tube connector (304) is fixedly connected to a metal inner liner tube (305), the outer wall of the metal inner liner tube (305) is fixedly connected to the inner wall of the rubber tube (303), and the end of the sampling tube connector (304) is fixedly connected to a sampling tube (307), the inner wall of the sampling tube (307) is inserted into the outer wall of the metal inner liner tube (305).

8. A novel flexible gas sampling head according to claim 6, characterized in that, A sealing ring (306) is fixedly connected to the outer wall of the sample suction tube connector (304), and the outer wall of the sealing ring (306) is in contact with the inner wall of the adjacent component.

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