SF6 gas recovery device for infrared leak detection

Abstract

The present invention relates to an SF6 gas recovery device for infrared leak detection, which is used to be installed on one side of an infrared imaging leak detector. The SF6 gas recovery device for infrared leak detection includes a carrier, and the carrier includes a substrate, a first side plate connected to one side of the substrate, a second side plate connected to the other side of the substrate, and a leakage plate connected to the top of the second side plate; the leakage plate and the second side plate are arranged at an angle; the leakage plate is provided with leakage holes at intervals, and the intersection between the extension line of the leakage hole and the first side plate is located on the first side plate. The above-mentioned SF6 gas recovery device for infrared leak detection has a simple structure and is easy to use. The leakage plate is installed at an angle on the carrier so that the infrared imaging leak detector can detect the gas concentration by detecting the leakage hole to ensure the accuracy of the detection result. At the same time, the first side plate is used to block the gas to facilitate subsequent recovery and prevent pollution.

Description

Technical Field

[0001] The invention relates to the technical field of electrical testing, and in particular to a SF6 gas recovery device for infrared leak detection. Background Art

[0002] SF6 (sulfur hexafluoride) gas is a colorless, odorless, non-toxic, non-flammable stable gas with a density of about five times that of air. It has excellent arc extinguishing and insulating properties and good chemical stability. Therefore, it has been used as an arc extinguishing medium for high-voltage circuit breakers since the late 1950s. In ultra-high voltage and UHV circuit breakers, SF6 has replaced oil as an arc extinguishing medium and has largely replaced compressed air.

[0003] With the development of modern science and technology and people's attention to environmental issues, the greenhouse effect of SF6 has received more and more attention, and the diffusion of SF6 gas into the air will threaten the health of workers, so it is necessary to detect the leakage of SF6 in electrical equipment. With the continuous development of modern live detection technology, infrared imaging technology has been gradually applied to the leakage detection of SF6 gas because it can detect the leakage of live SF6 gas-filled equipment non-contact and at a long distance, so that the leakage in electrical equipment can be found in real time and intuitively without power outage, and the source of SF6 gas leakage can be accurately determined. In order to facilitate the observation of infrared imaging leak detectors, the leakage point of SF6 gas needs to be exposed to the air, and the SF6 gas released from the leakage point cannot be effectively recovered. Therefore, in order to further solve the problem that SF6 gas cannot be recovered, it can be considered to put the SF6 infrared imaging leak detector sensitivity evaluation system and the SF6 infrared imaging leak detector into a closed device. However, when using an infrared imaging leak detector to detect SF6 gas leakage on site, it is necessary to be able to visually detect and locate the SF6 leakage source and accurately find the leakage point when it is at a certain distance from the equipment being tested. Therefore, when the SF6 infrared imaging leak detector sensitivity evaluation system is used as a trace leakage source of SF6, the infrared imaging leak detector being tested should maintain a certain distance from the standard source. According to the "Appendix 10: SF6 Infrared Imaging Leak Detector Performance Testing Technical Scheme" in the "Performance Testing Scheme for Power Equipment Live Detection Instruments of State Grid Corporation of China": a standard leakage source is used, and its flow rate is controlled to 0.06ml / min, and the distance between the instrument being tested and the standard leakage source is 3m (±0.1m). Therefore, in order to maintain the distance between the infrared imaging leak detector and the sensitivity evaluation system, it is not convenient to arrange the above instruments together in a closed device.

[0004] The common solution at this stage is to place the infrared imaging leak detector sensitivity evaluation system in the fume hood and use the infrared imaging leak detector to detect the leak location through the glass of the fume hood. However, glass, film, etc. placed in the path of infrared light will cause refraction and reflection of light, causing the detection results to deviate from the actual situation. Summary of the invention

[0005] Based on this, the present invention provides an SF6 gas recovery device for infrared leak detection, which has a simple structure and is easy to use. It does not affect the accuracy requirements of infrared leak detection and ensures the accuracy of the detection results. It can also effectively recover SF6 gas and prevent pollution caused by SF6 gas.

[0006] In order to achieve the purpose of the present invention, the present invention adopts the following technical solution:

[0007] A SF6 gas recovery device for infrared leak detection is used to be installed on one side of an infrared imaging leak detector. The SF6 gas recovery device for infrared leak detection includes a carrier, the carrier includes a substrate, a first side plate connected to one side of the substrate, a second side plate connected to the other side of the substrate, and a leakage plate connected to the top of the second side plate; the leakage plate and the second side plate are arranged at an angle; the leakage plate is provided with leakage holes at intervals, and the intersection between the extension line of the leakage hole and the first side plate is located on the first side plate.

[0008] The above-mentioned SF6 gas recovery device for infrared leak detection has a simple structure and is easy to use. The leakage plate is installed at an angle on the carrier to facilitate the infrared imaging leak detector to detect the leakage hole and detect the gas concentration, thereby ensuring the accuracy of the detection result. At the same time, the first side plate is used to block the gas to facilitate subsequent recovery and prevent pollution.

[0009] In one embodiment, the angle between the leakage plate and the second side plate is an obtuse angle.

[0010] In one of the embodiments, the horizontal plane where the air outlet end of the leakage port is located is lower than or equal to the horizontal plane where the external infrared imaging leak detector is located.

[0011] In one embodiment, the carrier further includes a temperature regulating plate installed on the inner surface of the second side plate.

[0012] In one of the embodiments, the adjustment range of the temperature adjustment plate is 0°C-50°C.

[0013] In one of the embodiments, the SF6 gas recovery device for infrared leak detection also includes a recovery component connected to the carrier; the recovery component includes an air groove and an air pump installed at the bottom of the air groove; the opposite sides of the air groove are respectively connected to the substrate, and a accommodating cavity is formed between the air groove and the substrate.

[0014] In one embodiment, the air groove is arranged in a concave shape.

[0015] In one embodiment, the substrate is provided with air holes at intervals, and the air holes penetrate through the plate body of the substrate; the air holes are connected to the accommodating cavity.

[0016] In one of the embodiments, a through hole is formed at the bottom of the air groove, and the through hole is used to connect to the air inlet of the air pump.

[0017] In one embodiment, the height of the first side panel is smaller than the height of the second side panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of an SF6 gas recovery device for infrared leak detection according to one embodiment of the present invention;

[0019] Figure 2 for Figure 1 An exploded schematic diagram of an SF6 gas recovery device for infrared leak detection is shown;

[0020] Figure 3 for Figure 1 The schematic diagram of the detection principle of the SF6 gas recovery device used for infrared leak detection is shown.

[0021] Notes on the attached drawings:

[0022] 10-carrier, 11-substrate, 110-air hole, 12-first side plate, 13-second side plate, 14-leakage plate, 140-leakage hole, 15-temperature regulating plate;

[0023] 20-recovery component, 21-air tank, 22-air pump, 23-accommodating cavity, 24-through hole;

[0024] 30-Infrared imaging leak detector. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] See also Figures 1 to 3 , is an SF6 gas recovery device for infrared leak detection according to an embodiment of the present invention, which is used to be installed on one side of an infrared imaging leak detector 30. The SF6 gas recovery device for infrared leak detection includes a carrier 10 and a recovery assembly 20 connected to the bottom of the carrier 10.

[0029] The carrier 10 includes a substrate 11, a first side plate 12 connected to one side of the substrate 11, a second side plate 13 connected to the other side of the substrate 11, and a leakage plate 14 connected to the top of the second side plate 13. In this embodiment, the substrate 11 is evenly spaced with a plurality of gas holes 110, which penetrate the body of the substrate 11 so that the top space and the bottom space of the substrate 11 are connected. The leakage plate 14 is spaced with leakage holes 140, which are used to allow SF6 gas to escape evenly and stably.

[0030] The height of the first side plate 12 is smaller than that of the second side plate 13, and the second side plate 13 and the leakage plate 14 are arranged at an angle. Furthermore, the angle formed between the second side plate 13 and the leakage plate 14 is an obtuse angle. Figure 3 As shown, the intersection of the extension line of the leakage hole 140 and the first side plate 12 is located on the first side plate 12, that is, the SF6 gas escaping from the leakage hole 140 will be blocked by the first side plate 12. Since the density of SF6 gas is greater than that of air, the SF6 gas will sink after being blocked by the first side plate 12 and then be recovered by the recovery assembly 20, which can effectively prevent the SF6 gas from leaking into the atmosphere and improve safety.

[0031] Since SF6 gas is released from the outlet of the leak hole 140 and diffuses to the surroundings, the farther away from the leak hole 140, the lower its concentration, so the SF6 gas concentration at the outlet of the leak hole 140 is the concentration set by the actual simulation, and the SF6 gas concentration far away from the outlet of the leak hole 140 is lower than the simulation value. It can be seen that when the leak hole 140 cannot be observed by the infrared imaging leak detector 30, the infrared imaging leak detector 30 cannot detect the SF6 gas of the actual simulation concentration value, and its detection result is unreliable, so it is necessary to set the second side plate 13 and the leak plate 14 at an obtuse angle, and further, the horizontal plane where the outlet of the leak hole 140 is located is lower than or equal to the horizontal plane where the infrared imaging leak detector 30 is located, so as to better detect the outlet of the leak hole 140.

[0032] Furthermore, the carrier 10 also includes a temperature regulating plate 15 installed on the inner surface of the second side plate 13 for regulating the temperature at the outlet end of the leakage hole 140. Specifically, in this embodiment, the regulating range of the temperature regulating plate 15 is 0°C-50°C.

[0033] The recovery component 20 includes an air groove 21 and an air pump 22 installed at the bottom of the air groove 21; the air pump 22 is used to connect to the recovery container to collect the leaked SF6 gas in the recovery container. In the present embodiment, the air groove 21 is roughly in a concave shape, and the opposite sides of the air groove 21 are respectively connected to the substrate 11, and a receiving cavity 23 is formed between the air groove 21 and the substrate 11. The air hole 110 is connected to the receiving cavity 23, so that the leaked SF6 gas passes through the air hole 110 and is deposited in the receiving cavity 23. Furthermore, in the present embodiment, a through hole 24 is opened at the bottom of the air groove 21, and the through hole 24 is used to connect to the air inlet of the air pump 22. Starting the air pump 22 can transport the SF6 gas deposited in the receiving cavity 23 to the recovery container.

[0034] The above-mentioned SF6 gas recovery device for infrared leak detection has a simple structure and is easy to use. The leakage plate 14 is installed obliquely on the carrier 10 to facilitate the infrared imaging leak detector 30 to detect the leakage hole 140 to detect the SF6 gas concentration, thereby ensuring the accuracy of the detection result. At the same time, the first side plate 12 is used to block the SF6 gas to facilitate subsequent recovery and prevent SF6 from causing pollution.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A SF6 gas recovery device for infrared leak detection, used to be installed on one side of an infrared imaging leak detector, characterized in that: The SF6 gas recovery device for infrared leak detection comprises a carrier, the carrier comprises a base plate, a first side plate connected to one side of the base plate, a second side plate connected to the other side of the base plate, and a leakage plate connected to the top of the second side plate, wherein the height of the first side plate is less than the height of the second side plate; The leakage plate and the second side plate are arranged obliquely, and the angle between the leakage plate and the second side plate is an obtuse angle; The leakage plate is provided with leakage holes at intervals, the intersection of the extended line of the leakage hole and the first side plate is located on the first side plate, and the horizontal plane where the gas outlet end of the leakage hole is located is lower than or equal to the horizontal plane where the infrared imaging leak detector is located; The SF6 gas recovery device for infrared leak detection also includes a recovery component connected to the carrier; the recovery component includes an air tank and an air pump installed at the bottom of the air tank; opposite sides of the air tank are respectively connected to the substrate, and a receiving cavity is formed between the air tank and the substrate; The substrate is provided with air holes at intervals, and the air holes penetrate through the plate body of the substrate; the air holes are connected to the accommodating cavity.

2. The SF6 gas recovery device for infrared leak detection according to claim 1 is characterized in that: The carrier also includes a temperature regulating plate installed on the inner surface of the second side plate.

3. The SF6 gas recovery device for infrared leak detection according to claim 2 is characterized in that: The adjustment range of the temperature adjustment plate is 0°C-50°C.

4. The SF6 gas recovery device for infrared leak detection according to claim 1, characterized in that: The air groove is arranged in a concave shape.

5. The SF6 gas recovery device for infrared leak detection according to claim 1, characterized in that: A through hole is provided at the bottom of the air groove, and the through hole is used to connect to the air inlet of the air pump.

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