A helium-nitrogen mixed gas pipeline leak detection device

Abstract

This invention relates to the technical field of pipeline leak detection devices, specifically a helium-nitrogen mixed gas pipeline leak detection device. It mainly includes a main body, with a flexible hose connected to the air inlet of the main body, and a connecting pipe connected to the other end of the hose. It also includes: a filter mechanism disposed inside the connecting pipe; an adjustment mechanism disposed below the connecting pipe; and a cleaning mechanism disposed inside the connecting pipe. When detecting a pipeline leak by bringing the suction tube close to the outer wall of the pipeline, the suction tube draws in the gas from the outer wall of the pipeline. The gas enters the main body for detection through the connecting pipe, connecting sleeve, connecting pipe, and flexible hose. As the gas passes through the connecting pipe, it is filtered by the filter cartridge and filter frame. These dust particles will not enter the mass spectrometry analysis chamber of the main body and will not interfere with the detection of helium ions. Even minor leaks in the pipeline can be accurately identified, thereby improving the accuracy of the detection.

Description

Technical Field

[0001] This invention relates to the field of pipeline leak detection devices, specifically a helium-nitrogen mixed gas pipeline leak detection device. Background Technology

[0002] The helium-nitrogen mixed gas pipeline leak detection device is a specialized instrument that uses a helium-nitrogen mixed gas as a tracer medium, combined with a high-sensitivity helium mass spectrometer leak detector, to intelligently detect leaks in pipeline systems. Its working principle involves injecting a mixture of helium and nitrogen in a specific ratio into the pipeline and pressurizing it to the test pressure. If a leak is found, the helium will escape and be captured by the leak detector. The intelligent sensor on the leak detector uses thermal conductivity and mass spectrometry analysis to accurately quantify the leakage amount and locate the leak point. This device boasts extremely high detection sensitivity, and helium is chemically stable, non-toxic, and non-flammable, ensuring high safety. It is widely used in high-pressure oil and gas pipelines, semiconductor manufacturing, and other fields.

[0003] When detecting pipeline leaks, a suction gun is moved along the outer wall of the pipeline to capture helium gas at the leak point, thereby detecting the leak. When inspecting outdoor pipelines, the presence of dust particles on the pipeline can cause these particles to enter the mass spectrometry analysis chamber of the leak detector through the suction gun during the leak detection process. This can interfere with the detection of helium ions, increase background noise, reduce detection sensitivity, and make it difficult to accurately identify even minor leaks in the pipeline, thus affecting the accuracy of the detection. Summary of the Invention

[0004] The purpose of this invention is to provide a helium-nitrogen mixed gas pipeline leakage detection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A helium-nitrogen mixed gas pipeline leak detection device includes: a main body, a touch screen, a switch button, and indicator lights mounted on the top surface of the main body; a flexible hose connected to the air inlet of the main body; a connecting pipe connected to the other end of the flexible hose; a connecting sleeve bolted to the bottom of the connecting pipe; a connecting tube rotatably connected to the inner wall of the connecting sleeve via a bearing; and a suction tube installed at the lower end of the connecting tube. The device also includes: The filter mechanism is located inside the connecting pipe. The filter mechanism includes a filter cylinder that is slidably installed on the inner wall of the connecting pipe, and a filter frame that is fixedly installed through the inner wall of the filter cylinder. The adjustment mechanism is located below the connecting pipe. The adjustment mechanism includes three L-shaped strips fixedly installed on the outer wall of the connecting pipe. An adjustment frame is fixedly installed at the other end of the L-shaped strips. Several slots are provided on the top surface of the adjustment frame. The cleaning mechanism is located inside the connecting pipe. The cleaning mechanism includes a rotating shaft located inside the connecting pipe, and a scraper is fixedly installed on the upper outer wall of the rotating shaft.

[0006] Preferably, a rubber sleeve is fixedly installed on the outer wall of the connecting pipe, a groove is provided on the bottom surface of the connecting pipe, a sealing groove is provided on the inner wall of the groove, and a sealing ring is installed on the inner wall of the sealing groove.

[0007] Preferably, the outer wall of the filter cartridge is bolted to the inner wall of the tank, and the filter cartridge is integrally provided with a raised frame. The outer wall of the raised frame is movably connected to the inner wall of the sealing groove, and the top surface of the raised frame abuts against the bottom surface of the sealing ring.

[0008] Preferably, the outer wall of the connecting sleeve is provided with a limiting groove, the inner wall of the limiting groove is rotatably connected to the inner wall of the adjusting frame, and the outer wall of the adjusting frame is provided with a friction groove.

[0009] Preferably, the outer wall of the connecting sleeve is provided with a T-shaped groove, a T-shaped block is slidably installed on the inner wall of the T-shaped groove, and a retaining strip is fixedly installed on the bottom surface of the T-shaped block, with the lower end of the retaining strip engaging with the retaining groove.

[0010] Preferably, an elastic element is fixedly installed on the top surface of the T-shaped block, and the upper end of the elastic element is fixedly connected to the inner wall of the T-shaped groove.

[0011] Preferably, a raised ring is fixedly installed on the bottom surface of the filter cartridge, a second sealing groove is provided on the outer wall of the raised ring, a second sealing ring is fixedly installed on the inner wall of the second sealing groove, the inner wall of the connecting pipe is slidably connected to the outer wall of the raised ring, and the inner wall of the connecting pipe abuts against the outer wall of the second sealing ring.

[0012] Preferably, the scraper bar is slidably connected to the outer wall of the filter frame, a fixing bar is fixedly installed on the inner wall of the filter cylinder, and the lower end of the rotating shaft rotates through the fixing bar via a bearing and extends to the bottom of the fixing bar.

[0013] Preferably, an installation strip is fixedly installed on the inner wall of the connecting pipe, a support column is fixedly installed on the top surface of the installation strip, and a locking block is fixedly installed on the upper end of the support column.

[0014] Preferably, a retaining box is fixedly installed at the lower end of the rotating shaft, and the outer wall of the retaining block is engaged with the inner wall of the retaining box.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention detects pipeline leaks by using an suction tube close to the outer wall of the pipeline. The suction tube draws in gas from the outer wall of the pipeline. The gas then enters the machine body for detection through a connecting tube, connecting sleeve, connecting pipe, and flexible hose. As the gas passes through the connecting pipe, it is filtered by a filter cartridge and filter frame to remove dust. The filter frame is a downward-facing cone. When dust is blocked by the filter cartridge, it accumulates on the top inner wall of the cartridge and blocks the filter holes. However, the gas can continue to be transported through the filter holes on the side of the filter frame. This ensures that the gas can be transported quickly while preventing these dust particles from entering the mass spectrometry analysis chamber of the machine body and interfering with the detection of helium ions. Even minor pipeline leaks can be accurately identified, thereby improving the accuracy of the detection. By pulling the T-block, the T-block squeezes the elastic element and moves the locking strip. The locking strip moves out of the slot, and the adjusting frame rotates a certain angle. The adjusting frame drives the L-shaped strip and the connecting pipe to rotate a certain angle. The inner wall of the connecting pipe abuts against the sealing ring, ensuring that the connecting pipe and the filter cartridge can rotate relative to each other while ensuring a seal. After the connecting pipe drives the suction pipe to rotate a certain angle, the T-block is loosened, and the elastic element pushes the T-block to move. The T-block drives the locking strip to engage with the slot to fix the adjusting frame, further fixing the suction pipe. When inspecting pipes in some narrow areas, the angle of the suction pipe can be adjusted to improve the flexibility of the inspection. After prolonged use, pulling the T-block separates the locking strip from the slot. Moving the adjustment frame causes the L-shaped strip and connecting pipe to rotate, which in turn rotates the mounting strip and support column. The support column then rotates the locking block and housing, which in turn rotates the rotating shaft and scraper. As the scraper rotates, it removes dust from the outer wall of the filter frame. The removed dust falls and is discharged through the suction pipe, ensuring the filter frame remains clean and does not obstruct gas from entering the machine. This allows for rapid gas entry into the machine for testing during subsequent use, thereby improving the accuracy and quality of the tests. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the connecting pipe of the present invention; Figure 3 This is a schematic cross-sectional view of the three-dimensional structure of the connecting pipe of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is an exploded view of the three-dimensional structure of the connecting pipe of the present invention; Figure 6 This is an exploded view of the three-dimensional structure of the connecting sleeve of the present invention; Figure 7 This is an exploded view of the three-dimensional structure of the filter cartridge of the present invention; Figure 8 This is an exploded view of the three-dimensional structure of the connecting pipe of the present invention; Figure 9 This is a schematic cross-sectional view of the three-dimensional structure of the filter cartridge of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of section B in the middle.

[0017] In the picture: 1. Main body; 101. Touch screen; 102. Power button; 103. Indicator light; 104. Hose; 105. Connecting tube; 106. Rubber sleeve; 107. Connecting sleeve; 108. Connecting tube; 109. Suction tube; 2. Filtration mechanism; 201. Tank; 202. Sealing groove one; 203. Sealing ring one; 204. Filter cartridge; 205. Raised frame; 206. Filter frame; 3. Adjustment mechanism; 301. L-shaped strip; 302. Adjustment frame; 303. Limiting groove; 304. Slot; 305. T-shaped groove; 306. T-shaped block; 307. Slot strip; 308. Elastic element; 309. Raised ring; 310. Sealing groove two; 311. Sealing ring two; 4. Cleaning mechanism; 401. Fixing strip; 402. Rotating shaft; 403. Scraper; 404. Clamp; 405. Mounting strip; 406. Support column; 407. Clamping block. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] like Figures 1-10 As shown, this application provides a helium-nitrogen mixed gas pipeline leak detection device, including: a body 1, a touch screen 101, a switch button 102 and an indicator light 103 installed on the top surface of the body 1, a hose 104 connected to the air inlet of the body 1, a connecting pipe 105 connected to the other end of the hose 104, a connecting sleeve 107 connected to the bottom surface of the connecting pipe 105 by bolts, a connecting pipe 108 rotatably connected to the inner wall of the connecting sleeve 107 by a bearing, and a suction pipe 109 installed at the lower end of the connecting pipe 108.

[0021] The filter mechanism 2 is located inside the connecting pipe 105. The filter mechanism 2 includes a filter cylinder 204 that is slidably installed on the inner wall of the connecting pipe 105. A filter frame 206 is fixedly installed through the inner wall of the filter cylinder 204. The filter frame 206 is set in a conical shape. Specifically, such as Figures 4-7 As shown, a rubber sleeve 106 is fixedly installed on the outer wall of the connecting pipe 105, a groove 201 is provided on the bottom surface of the connecting pipe 105, a sealing groove 202 is provided on the inner wall of the groove 201, and a sealing ring 203 is installed on the inner wall of the sealing groove 202.

[0022] In this embodiment: the rubber sleeve 106 increases the friction of the handheld connecting tube 105, ensuring the stability of picking up the handle; the sealing groove 202 fixes the sealing ring 203.

[0023] Specifically, such as Figures 4-7 As shown, the outer wall of the filter cartridge 204 is fixedly connected to the inner wall of the tank 201 by bolts. The filter cartridge 204 is integrally provided with a raised frame 205. The outer wall of the raised frame 205 is movably connected to the inner wall of the sealing groove 202. The top surface of the raised frame 205 abuts against the bottom surface of the sealing ring 203.

[0024] In this embodiment: the raised frame 205 is provided, and the top surface of the raised frame 205 abuts against the bottom surface of the sealing ring 203, ensuring the seal between the filter cartridge 204 and the connecting pipe 105, so that the gas will not leak.

[0025] The adjustment mechanism 3 located below the connecting pipe 105 includes three L-shaped strips 301 fixedly installed on the outer wall of the connecting pipe 108. An adjustment frame 302 is fixedly installed at the other end of the L-shaped strips 301. Several slots 304 are provided on the top surface of the adjustment frame 302. Specifically, such as Figures 4-8 As shown, the outer wall of the connecting sleeve 107 is provided with a limiting groove 303, the inner wall of the limiting groove 303 is rotatably connected to the inner wall of the adjusting frame 302, and the outer wall of the adjusting frame 302 is provided with a friction groove.

[0026] In this embodiment: the adjustment frame 302 is limited by the limiting groove 303, and the adjustment frame 302 can rotate inside the limiting groove 303. The friction groove allows the adjustment frame 302 to rotate manually.

[0027] Specifically, such as Figures 4-8 As shown, the outer wall of the connecting sleeve 107 is provided with a T-shaped groove 305, and a T-shaped block 306 is slidably installed on the inner wall of the T-shaped groove 305. A retaining strip 307 is fixedly installed on the bottom surface of the T-shaped block 306, and the lower end of the retaining strip 307 is engaged with the retaining groove 304.

[0028] In this embodiment: the T-shaped groove 305 limits the T-shaped block 306, making the movement of the T-shaped block 306 more stable. The T-shaped block 306 drives the locking strip 307 to move, so that the locking strip 307 engages with the locking groove 304, thereby fixing the adjustment frame 302.

[0029] Specifically, such as Figures 4-8 As shown, an elastic element 308 is fixedly installed on the top surface of the T-shaped block 306, and the upper end of the elastic element 308 is fixedly connected to the inner wall of the T-shaped groove 305.

[0030] In this embodiment: the elastic element 308 applies elastic force to the T-block 306, and applies continuous thrust to the T-block 306.

[0031] Specifically, such as Figures 4-8 As shown, a raised ring 309 is fixedly installed on the bottom surface of the filter cartridge 204. A sealing groove 310 is provided on the outer wall of the raised ring 309. A sealing ring 311 is fixedly installed on the inner wall of the sealing groove 310. The inner wall of the connecting pipe 108 is slidably connected to the outer wall of the raised ring 309, and the inner wall of the connecting pipe 108 abuts against the outer wall of the sealing ring 311.

[0032] In this embodiment: the raised ring 309, the second sealing groove 310, the second sealing ring 311 and the connecting pipe 108 are provided so that the connecting pipe 108 and the filter cartridge 204 can rotate relative to each other while sealing is performed.

[0033] The cleaning mechanism 4 is located inside the connecting pipe 105. The cleaning mechanism 4 includes a rotating shaft 402 located inside the connecting pipe 105. A scraper 403 is fixedly installed on the outer wall of the upper end of the rotating shaft 402.

[0034] Specifically, such as Figures 9-10 As shown, the scraper 403 is slidably connected to the outer wall of the filter frame 206, and a fixing strip 401 is fixedly installed on the inner wall of the filter cylinder 204. The lower end of the rotating shaft 402 rotates through the fixing strip 401 via a bearing and extends to the bottom of the fixing strip 401.

[0035] In this embodiment: the scraper 403 can scrape off dust particles on the outer wall of the filter frame 206, ensuring that gas can quickly enter the machine body 1 from the filter frame 206, thereby improving the accuracy of detection.

[0036] Specifically, such as Figure 8 As shown, an installation strip 405 is fixedly installed on the inner wall of the connecting pipe 108, a support column 406 is fixedly installed on the top surface of the installation strip 405, and a locking block 407 is fixedly installed on the upper end of the support column 406.

[0037] In this embodiment: the support column 406 is fixed by the installation strip 405, and the locking block 407 is further supported and fixed.

[0038] Specifically, such as Figure 4 As shown, a retaining box 404 is fixedly installed at the lower end of the rotating shaft 402, and the outer wall of the retaining block 407 is engaged with the inner wall of the retaining box 404.

[0039] In this embodiment: the outer wall of the locking block 407 is engaged with the inner wall of the housing 404. The locking block 407 limits the housing 404. When the locking block 407 rotates, it drives the housing 404, the rotating shaft 402 and the scraper 403 to rotate and remove dust from the outer wall of the filter frame 206. At the same time, when the locking block 407 moves downward, it can separate from the housing 404.

[0040] Specifically, the solution is as follows: Pulling the T-block 306 causes it to press against the elastic element 308 and move the retaining strip 307. The retaining strip 307 moves out of the slot 304. The adjusting frame 302 rotates a certain angle, causing the L-shaped strip 301 and the connecting pipe 108 to rotate a certain angle. The inner wall of the connecting pipe 108 abuts against the sealing ring 311, ensuring relative rotation between the connecting pipe 108 and the filter cartridge 204 while maintaining a seal. After the connecting pipe 108 rotates the suction pipe 109 a certain angle, the T-block 306 is loosened. The elastic element 308 pushes the T-block 306 to move, causing the T-block 306 to move against the retaining strip 307 and the slot 304. 04. Secure the adjusting frame 302 with the snap-fit ​​connector to further secure the suction tube 109. When inspecting pipes in confined areas, the angle of the suction tube 109 can be adjusted for inspection. Press the switch button 102 to turn on the machine body 1; the indicator light 103 will turn green. Hold the rubber sleeve 106 and bring the suction tube 109 close to the outer wall of the pipe for leak detection. The suction tube 109 draws in gas from the outer wall of the pipe. The gas enters the machine body 1 through the connecting pipe 108, connecting sleeve 107, connecting pipe 105, and hose 104 for inspection. If a leak is detected, the indicator light 103 changes from green to red; otherwise, it remains unchanged. When passing through the connecting pipe 105, the gas is filtered by the filter cartridge 204 and filter frame 206, which filters out dust in the gas. The filter frame 206 is a downward-facing cone. When dust is blocked by the filter cartridge 204, it accumulates on the top inner wall of the filter cartridge 204 and blocks the filter holes on the filter cartridge 204. The gas can continue to be transported through the filter holes on the side of the filter frame 206, ensuring that the gas can be transported quickly. At the same time, these dust particles will not enter the mass spectrometry analysis chamber of the machine body 1 and will not interfere with the detection of helium ions. Even in the event of a small leak in the pipeline, it can be accurately identified, thereby improving the accuracy of the detection. After long-term use, pulling the T-shaped block 306 can drive... The locking strip 307 separates from the locking slot 304. The adjusting frame 302 is moved, which drives the L-shaped strip 301 and the connecting pipe 108 to rotate. The connecting pipe 108 drives the mounting strip 405 and the support column 406 to rotate. The support column 406 drives the locking block 407 and the locking case 404 to rotate, which in turn drives the rotating shaft 402 and the scraper 403 to rotate. While the scraper 403 is rotating, it scrapes off the dust on the outer wall of the filter frame 206. The scraped dust falls and is discharged from the suction pipe 109, ensuring that the cleanliness of the filter frame 206 will not block the gas from entering the machine body 1. In subsequent use, this ensures that the gas can quickly enter the machine body 1 for detection, thereby improving the accuracy and quality of the detection.

[0041] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0042] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A helium-nitrogen gas pipeline leak detection apparatus comprising: The body (1), the top surface of the body (1) is provided with a touch screen (101), a switch button (102) and an indicator light (103), the air inlet of the body (1) is connected with a hose (104), the other end of the hose (104) is connected with a connecting pipe (105), the bottom surface of the connecting pipe (105) is connected with a connecting sleeve (107) through bolts, the inner wall of the connecting sleeve (107) is rotatably connected with a communication pipe (108) through a bearing, and the lower end of the communication pipe (108) is provided with a suction pipe (109), characterized by further comprising: A filtering mechanism (2) is arranged in the connecting pipe (105), the filtering mechanism (2) comprises a filter cartridge (204) slidably mounted on the inner wall of the connecting pipe (105), and the inner wall of the filter cartridge (204) is fixedly provided with a filter frame (206); An adjusting mechanism (3) is arranged below the connecting pipe (105), the adjusting mechanism (3) comprises three L-shaped strips (301) fixedly mounted on the outer wall of the communication pipe (108), the other end of the L-shaped strip (301) is fixedly provided with an adjusting frame (302), and the top surface of the adjusting frame (302) is provided with a plurality of clamping grooves (304); A cleaning mechanism (4) is arranged in the connecting pipe (105), the cleaning mechanism (4) comprises a rotating shaft (402) located in the connecting pipe (105), and the outer wall of the upper end of the rotating shaft (402) is fixedly provided with a scraping strip (403).

2. The helium-nitrogen gas pipeline leak detection apparatus according to claim 1, wherein The outer wall of the connecting pipe (105) is fixedly provided with a rubber sleeve (106), the bottom surface of the connecting pipe (105) is provided with a groove (201), the inner wall of the groove (201) is provided with a sealing groove (202), and the inner wall of the sealing groove (202) is provided with a sealing ring (203).

3. The helium-nitrogen gas pipeline leak detection apparatus according to claim 2, wherein The outer wall of the filter cartridge (204) is fixedly connected with the inner wall of the groove (201) through bolts, the filter cartridge (204) is integrally provided with a protruding frame (205), the outer wall of the protruding frame (205) is movably connected with the inner wall of the sealing groove (202), and the top surface of the protruding frame (205) abuts against the bottom surface of the sealing ring (203).

4. The helium-nitrogen gas pipeline leak detection apparatus according to claim 1, wherein The outer wall of the connecting sleeve (107) is provided with a limiting groove (303), the inner wall of the limiting groove (303) is rotatably connected with the inner wall of the adjusting frame (302), and the outer wall of the adjusting frame (302) is provided with a friction groove.

5. The helium-nitrogen gas pipeline leak detection apparatus according to claim 4, wherein The outer wall of the connecting sleeve (107) is provided with a T-shaped groove (305), the inner wall of the T-shaped groove (305) is slidably provided with a T-shaped block (306), the bottom surface of the T-shaped block (306) is fixedly provided with a clamping strip (307), and the lower end of the clamping strip (307) is clamped with the clamping groove (304).

6. The helium-nitrogen gas pipeline leak detection apparatus according to claim 5, wherein The top surface of the T-shaped block (306) is fixedly provided with an elastic member (308), and the upper end of the elastic member (308) is fixedly connected with the inner wall of the T-shaped groove (305).

7. The helium-nitrogen gas pipeline leak detection apparatus according to claim 6, wherein The bottom surface of the filter cartridge (204) is fixedly installed with a raised ring (309). The outer wall of the raised ring (309) is provided with a sealing groove (310). The inner wall of the sealing groove (310) is fixedly installed with a sealing ring (311). The inner wall of the connecting pipe (108) is slidably connected to the outer wall of the raised ring (309). The inner wall of the connecting pipe (108) abuts against the outer wall of the sealing ring (311).

8. The helium-nitrogen gas pipeline leak detection apparatus according to claim 1, wherein The scraper (403) is slidably connected to the outer wall of the filter frame (206). A fixing strip (401) is fixedly installed on the inner wall of the filter cylinder (204). The lower end of the rotating shaft (402) rotates through the fixing strip (401) via a bearing and extends to the bottom of the fixing strip (401).

9. The helium-nitrogen gas pipeline leak detection apparatus according to claim 8, wherein An installation strip (405) is fixedly installed on the inner wall of the connecting pipe (108), a support column (406) is fixedly installed on the top surface of the installation strip (405), and a locking block (407) is fixedly installed on the upper end of the support column (406).

10. The helium-nitrogen gas pipeline leak detection apparatus according to claim 9, wherein A retainer (404) is fixedly installed at the lower end of the rotating shaft (402), and the outer wall of the retainer block (407) is engaged with the inner wall of the retainer (404).

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