SF6 gas leak detector

Abstract

The utility model relates to a kind of SF6 gas leak detection gas collection detector, belong to sulfur hexafluoride leakage detection technical field.The SF6 gas leak detection gas collection detector, including: mobile cabinet, cable is fixedly installed in the inside of mobile cabinet, the output end of cable is fixedly installed with detector;Detection gas collection mechanism is used to the SF6 gas detected in detection is recovered and the detection gas collection mechanism is set on the side of detection gas collection mechanism;Wherein, the detection gas collection mechanism includes the detection rod fixedly installed in the side of detector;Detection component has guiding and air suction function, can actively inhale ambient gas in detection process, form stable concentrated detection flow field, significantly improve gas sampling efficiency, reduce the signal error caused by wind interference or environmental dilution, enhance the stability and reliability of detection process, detector outside is provided with gas collection component, gas collection component is communicated with detection channel, can be sampled while after detection SF6-containing gas is guided into recovery.

Description

Technical Field

[0001] This utility model relates to the field of sulfur hexafluoride leak detection technology, and in particular to an SF6 gas leak detection and collection instrument. Background Technology

[0002] SF6 gas, as a highly efficient insulating and arc-quenching medium, is widely used in high-voltage electrical equipment, such as gas-insulated metal-enclosed switchgear (GIS), high-voltage circuit breakers, and instrument transformers. During the operation and maintenance of power systems, SF6 gas poses a risk of leakage due to seal aging, structural loosening, or installation issues. Once leaked, it not only leads to a decline in equipment insulation performance and safety hazards but also pollutes the environment due to its strong greenhouse effect. Therefore, accurate detection and timely recovery of SF6 gas leaks are crucial measures to ensure equipment safety and environmental compliance.

[0003] Existing SF6 gas leak detection methods mainly use handheld infrared sensors or electronic nose detection devices, relying on inspectors to scan suspicious areas point by point to determine whether there is a leak. Since the concentration of leaked gas is often extremely low, and most detection environments are located outdoors or in semi-enclosed spaces, air convection can cause the gas to spread rapidly, making it difficult for the sensor to accurately capture the target gas signal, thus affecting the detection sensitivity and accuracy. Utility Model Content

[0004] Therefore, it is necessary to address the existing SF6 gas leak detection methods, which mainly rely on handheld infrared sensors or electronic nose detection devices, and depend on inspectors scanning suspicious areas point by point to determine whether a leak exists. Since the concentration of leaking gas is often extremely low, and most detection environments are outdoors or in semi-enclosed spaces, air convection causes the gas to diffuse rapidly, making it difficult for sensors to accurately capture the target gas signal, thus affecting detection sensitivity and accuracy. To address this issue, an SF6 gas leak detection and collection device is provided, comprising: a mobile cabinet, with a cable fixedly installed inside the cabinet, and the detector fixedly installed at the output end of the cable; a detection and collection mechanism, used to collect and recover the detected SF6 gas during detection, located on one side of the detection and collection device; wherein the detection and collection mechanism includes a detection rod fixedly installed on one side of the detector, a detection component disposed on the outer side of the detection rod, and a collection component disposed on the outer side of the detector.

[0005] The detection assembly includes a gas collection hood disposed on the outside of the detection rod, the gas collection hood being located outside the detection end of the detection rod, and a vacuum pump being fixedly installed at the bottom of the detector, the vacuum pump being fixedly connected to the gas collection hood through an absorption pipe.

[0006] The gas collecting hood is shaped like a horn, and a guide ring is fixedly installed inside the gas collecting hood. The guide ring is shaped like a funnel and is located outside the detection end of the detection rod.

[0007] A sealing ring is fixedly installed on one side of the gas collection hood, and one side of the sealing ring extends into the interior of the gas collection hood.

[0008] A fixing ring is fixedly installed on the surface of the detection rod. The fixing ring is located on one side of the gas collection hood, and the fixing ring and the gas collection hood are fixedly connected by a spring.

[0009] The gas collection assembly includes a storage tank located at the bottom of the detector, and one side of the storage tank is fixedly connected to the output end of the air pump.

[0010] Both ends of the storage tank are fixedly equipped with telescopic bladders, and both telescopic bladders are connected to the storage tank.

[0011] A screw is fixedly installed at the bottom of the detector, and a connecting ring is rotatably installed at the top of the storage tank. The connecting ring is threadedly connected to the screw. A connecting pipe is rotatably installed on one side of the storage tank, and the connecting pipe is threadedly connected to the output end of the air pump.

[0012] Beneficial effects

[0013] 1. The detection component has guiding and air intake functions. During the detection process, it can actively draw in the surrounding gas to form a stable and concentrated detection flow field, which significantly improves the gas sampling efficiency, reduces signal errors caused by wind interference or environmental dilution, and enhances the stability and reliability of the detection process. A gas collection component is set on the outside of the detector. The gas collection component is connected to the detection channel and can introduce the detected SF6-containing gas into the recovery system at the same time as sampling.

[0014] 2. During the testing process, the air pump draws in the test gas through the test rod and the gas collection hood, and finally delivers the residual gas to the storage tank for collection and storage. During the SF6 gas recovery process, the expansion bladder can automatically expand or contract according to the change in the amount of gas entering, thereby dynamically adjusting the gas pressure balance and storage space inside the tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the gas collection and detection mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the detection component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the gas collection component structure of this utility model.

[0020] Figure label:

[0021] 100. Mobile cabinet; 200. Cable; 210. Detector; 300. Detection and gas collection mechanism; 310. Detection rod; 320. Detection assembly; 321. Gas collection hood; 322. Air pump; 323. Absorption pipe; 324. Guide ring; 325. Sealing ring; 326. Fixing ring; 327. Spring; 330. Gas collection assembly; 331. Storage tank; 332. Telescopic bladder; 333. Screw; 334. Connecting ring; 335. Connecting pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] The following is combined with Figures 1-4 This invention describes an SF6 gas leak detection and collection instrument.

[0028] In one embodiment, an SF6 gas leak detection and collection device includes: a mobile cabinet 100, a cable 200 fixedly installed inside the mobile cabinet 100, and a detector 210 fixedly installed at the output end of the cable 200; a detection and collection mechanism 300, which is disposed on one side of the detection and collection mechanism 300 for collecting and recovering the detected SF6 gas during detection; wherein the detection and collection mechanism 300 includes a detection rod 310 fixedly installed on one side of the detector 210, a detection component 320 disposed on the outer side of the detection rod 310, and a collection component 330 disposed on the outer side of the detector 210.

[0029] In this embodiment, the detection component 320 has the functions of guiding and absorbing air. It can actively guide and sample the surrounding gas during detection to form a stable detection flow field, avoid signal distortion caused by wind or environmental disturbance, and improve detection stability and anti-interference ability. At the same time, a gas collection component 330 is set on the outside of the detector 210. The gas collection component 330 is connected to the detection channel and can synchronously recover the SF6-containing gas absorbed during the detection process, so as to avoid the gas being directly discharged into the atmosphere after the detection is completed, and effectively reduce the amount of SF6 gas emissions.

[0030] It should be noted that the basic components of the existing detection device mainly include: a sensor unit for detecting the concentration of SF6 gas in the detector 210, a cable 200, and a detection rod 310 located on one side of the detector 210. The detection component 320 is located on the outside of the detection rod 310 and forms a gas guiding connection with the sampling port of the detector 210. In the actual detection process, it only guides the external ambient gas and will not cause adverse effects such as blockage, back pressure, or backflow to the sensor sampling system. The gas collection component 330 is located on the other side of the detector 210 and is connected to the end of the detection channel. Its function is to collect excess gas after sampling and will not change the original structure, function, or usage of the detector 210.

[0031] like Figure 2 , Figure 3 and Figure 4 As shown, the detection assembly 320 includes a gas collection hood 321 disposed on the outside of the detection rod 310. The gas collection hood 321 is located on the outside of the detection end of the detection rod 310. A vacuum pump 322 is fixedly installed at the bottom of the detector 210. The vacuum pump 322 and the gas collection hood 321 are fixedly connected through an absorption pipe 323.

[0032] In this embodiment, by setting a gas collection hood 321 on the outside of the detection end of the detection rod 310, a local semi-enclosed gas collection space can be formed during the detection process, which enhances the ability to gather leaked SF6 gas, avoids the gas in the detection area from being disturbed by wind or diluted by the environment, and improves the stability of the sampling concentration. The suction pump 322 is connected to the gas collection hood 321 through the absorption pipe 323, which can form a continuous negative pressure suction effect inside the gas collection hood 321 during the detection, so as to realize the active guidance sampling of SF6 gas in the detection target area.

[0033] The gas collection hood 321 is shaped like a horn, and a guide ring 324 is fixedly installed inside the gas collection hood 321. The guide ring 324 is shaped like a funnel and is located outside the detection end of the detection rod 310.

[0034] In this embodiment, the gas collection hood 321 is configured in the shape of a horn, with its opening facing outward and close to the detection area, which can expand the gas collection range during the detection operation. The guide ring 324 is generally funnel-shaped and is installed on the outer front end of the detection rod 310 to further concentrate the gas flow in the gas collection path. The guide ring 324 directs the gas collected at the horn opening to the sampling end of the detection rod 310, thereby forming a stable flow field when the air pump 322 is working.

[0035] A sealing ring 325 is fixedly installed on one side of the gas collection hood 321, and one side of the sealing ring 325 extends into the interior of the gas collection hood 321.

[0036] In this embodiment, the sealing ring 325 fits against the detection surface to form a stable gas collection space, preventing external airflow disturbance and gas diffusion, and improving the stability of gas concentration; the material is soft and has strong conformity, adapting to different detection area shapes, enhancing detection accuracy without affecting the use of the main equipment.

[0037] A fixing ring 326 is fixedly installed on the surface of the detection rod 310. The fixing ring 326 is located on one side of the gas collection hood 321, and the fixing ring 326 and the gas collection hood 321 are fixedly connected by a spring 327.

[0038] In this embodiment, the air collection hood 321 is elastically connected to the spring 327, which allows the air collection hood 321 to float or buffer relative to the detection rod 310 in a certain range in the axial direction. This allows the hood 321 to automatically adjust its position when it is attached to the detection surface or encounters external disturbances, thereby enhancing the device's fit adaptability and impact resistance.

[0039] like Figure 2 , Figure 3 and Figure 4 As shown, the gas collection assembly 330 includes a storage tank 331 disposed at the bottom of the detector 210, and one side of the storage tank 331 is fixedly connected to the output end of the air pump 322.

[0040] In this embodiment, during the detection process, the vacuum pump 322 draws in the detection gas through the detection rod 310 and the gas collection hood 321, and finally transports the residual gas to the storage tank 331 for collection and storage.

[0041] Both ends of the storage tank 331 are fixedly installed with telescopic bladders 332, and both telescopic bladders 332 are connected to the storage tank 331.

[0042] In this embodiment, during the SF6 gas recovery process, the telescopic bladder 332 can automatically expand or contract according to the change in the amount of gas entering, thereby dynamically adjusting the gas pressure balance and storage space inside the tank.

[0043] A screw 333 is fixedly installed at the bottom of the detector 210, a connecting ring 334 is rotatably installed on the top of the storage tank 331, the connecting ring 334 is threadedly connected to the screw 333, and a connecting pipe 335 is rotatably installed on one side of the storage tank 331, the connecting pipe 335 is threadedly connected to the output end of the vacuum pump 322.

[0044] In this embodiment, a connecting ring 334 is rotatably mounted on the top of the storage tank 331 and is threadedly connected to the screw 333 through the connecting ring 334, which enables the storage tank 331 to be detachably fixed, facilitating the replacement, maintenance or cleaning of the tank after use. At the same time, a connecting pipe 335 is provided on one side of the storage tank 331 and is threadedly connected to the output end of the air pump 322, which has strong sealing and anti-loosening performance, ensuring that the gas recovery channel will not leak or loosen under high-frequency air pumping operation.

[0045] Working Principle: During use, the operator pushes the device near the equipment to be tested using the mobile cabinet 100. The detector 210 starts up with power and signal connection via the cable 200. The front end of the detection rod 310 has a horn-shaped gas collection hood 321, which, with the sealing ring 325 in place, forms a locally sealed space with the area being tested. The suction pump 322 starts working, creating a continuous negative pressure inside the gas collection hood 321 through the absorption pipe 323. This guides the leaked SF6 gas along the funnel-shaped flow channel of the guide ring 324 into the sampling end. The detection component 320 actively samples the gas in this flow field, stabilizing the airflow path and improving the gas concentration response efficiency. After analysis by the sensors inside the detector 210, the extracted gas is further transported by the suction pump 322 in the gas collection component 330 to the storage tank 331 located at the bottom. When gas enters storage tank 331, the expansion bladder 332 automatically inflates to regulate the internal gas pressure, maintain the stability of the tank structure, and prevent internal pressure fluctuations from affecting the sealing performance. Simultaneously, it is threadedly connected to the output end of the vacuum pump 322 via connecting pipe 335 to ensure the airtightness of the delivery path. Storage tank 331 is threadedly connected to the screw 333 at the bottom of detector 210 via a connecting ring 334 at the top, facilitating future disassembly, replacement, cleaning, and maintenance.

[0046] It should be noted that the detector and air pump mentioned above are all devices with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the detector and air pump can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An SF6 gas leak detection and collection instrument, characterized in that, include: A mobile cabinet (100) is provided, with a cable (200) fixedly installed inside the mobile cabinet (100), and a detector (210) is fixedly installed at the output end of the cable (200). A gas collection mechanism (300) for collecting and recovering the detected SF6 gas during detection is provided on one side of the gas collection mechanism (300); The detection gas collection mechanism (300) includes a detection rod (310) fixedly installed on one side of the detector (210), a detection component (320) is provided on the outside of the detection rod (310), and a gas collection component (330) is provided on the outside of the detector (210).

2. The SF6 gas leak detection and collection instrument according to claim 1, characterized in that, The detection assembly (320) includes a gas collection hood (321) disposed on the outside of the detection rod (310). The gas collection hood (321) is located on the outside of the detection end of the detection rod (310). A vacuum pump (322) is fixedly installed at the bottom of the detector (210). The vacuum pump (322) and the gas collection hood (321) are fixedly connected through an absorption pipe (323).

3. The SF6 gas leak detection and collection instrument according to claim 2, characterized in that, The gas collection hood (321) is configured in the shape of a horn, and a guide ring (324) is fixedly installed inside the gas collection hood (321). The guide ring (324) is configured in the shape of a funnel and is located outside the detection end of the detection rod (310).

4. The SF6 gas leak detection and collection instrument according to claim 2, characterized in that, A sealing ring (325) is fixedly installed on one side of the gas collection hood (321), and one side of the sealing ring (325) extends into the interior of the gas collection hood (321).

5. The SF6 gas leak detection and collection instrument according to claim 2, characterized in that, A fixing ring (326) is fixedly installed on the surface of the detection rod (310). The fixing ring (326) is located on one side of the gas collection hood (321). The fixing ring (326) and the gas collection hood (321) are fixedly connected by a spring (327).

6. The SF6 gas leak detection and collection instrument according to claim 1, characterized in that, The gas collection assembly (330) includes a storage tank (331) disposed at the bottom of the detector (210), and one side of the storage tank (331) is fixedly connected to the output end of the air pump (322).

7. The SF6 gas leak detection and collection instrument according to claim 6, characterized in that, Both ends of the storage tank (331) are fixedly installed with telescopic bladders (332), and both telescopic bladders (332) are connected to the storage tank (331).

8. The SF6 gas leak detection and collection instrument according to claim 7, characterized in that, A screw (333) is fixedly installed at the bottom of the detector (210), and a connecting ring (334) is rotatably installed at the top of the storage tank (331). The connecting ring (334) is threadedly connected to the screw (333), and a connecting pipe (335) is rotatably installed on one side of the storage tank (331). The connecting pipe (335) is threadedly connected to the output end of the air pump (322).

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