CN215448974U - Gas detection device capable of being pumped back - Google Patents

Abstract

The utility model relates to a gas detection device capable of being pumped back, which comprises a detection pool, a light source, a spectrometer and a telescopic motor, wherein the light source and the spectrometer are oppositely arranged at two ends of the detection pool; a piston is arranged in the detection pool, the piston is in sliding fit with the inner wall of the detection pool, and the piston is fixedly connected with a push rod of a telescopic motor; one side of the detection pool, which deviates from the telescopic motor, is provided with an air pipe, the air pipe is communicated with an air source, and the air pipe is provided with a regulating valve. After the tested gas is sampled and detected, the tested gas can be pumped back into the original gas container, and the tested gas does not escape in the detection process, so that the environment is protected.

Description

Gas detection device capable of being pumped back

Technical Field

The utility model relates to the technical field of gas detection, in particular to a gas detection device capable of being pumped back.

Background

With the rapid development of economy and the great increase of power load, the requirements on the power supply level and the operation performance of a power grid are higher and higher. GIS equipment is widely applied due to small volume, small occupied area, high reliability, good fireproof performance and short construction period of the complete equipment. Meanwhile, the monitoring of the running state and the fault diagnosis of the GIS equipment of the power system also become important work related to the running safety of the power grid. By detecting gas components generated by decomposing the GIS gas insulating medium, the fault type and the defect development trend caused by different insulation defects are judged.

According to national standards, SF6 belongs to the greenhouse gas. In the field detection of the SF6 gas at the present stage, the extracted sample gas is directly discharged or collected for post-treatment. With the popularization of GIS equipment of a power system, SF6 gas is widely applied. The tail gas treatment mode at the present stage is not beneficial to the targets of carbon neutralization and carbon peak reaching in China. Therefore, the method has important significance in measuring various greenhouse gases (such as SF6 gas) and pumping the detected gas back to the power cabinet.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pumpable gas detection device aiming at the technical problems in the prior art, which can pump the detected gas back into the original gas container after sampling and detecting the detected gas, and has no escape of the detected gas in the detection process, thereby protecting the environment.

The technical scheme for solving the technical problems is as follows:

a gas detection device capable of being pumped back comprises a detection cell, a light source, a spectrometer and a telescopic motor, wherein the light source and the spectrometer are oppositely arranged at two ends of the detection cell; a piston is arranged in the detection pool, the piston is in sliding fit with the inner wall of the detection pool, and the piston is fixedly connected with a push rod of a telescopic motor; one side of the detection pool, which deviates from the telescopic motor, is provided with an air pipe, the air pipe is communicated with an air source, and the air pipe is provided with a regulating valve.

On the basis of the technical scheme, the utility model can be further improved as follows.

Preferably, the both ends in detection pond are equipped with the window respectively, window and detection pond be airtight connection, the one end that is close to the spectrum appearance on the detection pond is equipped with the focusing mirror, the light of light source arrives in the spectrum appearance after passing through first window, detection pond, second window and focusing mirror in proper order.

Preferably, the focusing mirror is a convex lens, and the surface of the focusing mirror facing the light source is a convex surface.

Preferably, the light source is a xenon lamp.

Preferably, the regulating valve is arranged on the air pipe and close to the detection pool.

Preferably, the regulating valve is a pressure reducing valve.

The utility model has the beneficial effects that: the device is communicated with a tested electric cabinet through an air pipe, the regulating valve is opened, the tested SF6 gas enters the detection chamber through the air pipe, the piston is pushed to slide towards the direction of the telescopic motor, and the detection light source and the spectrometer are started to detect after the tested gas fills the detection chamber. After the detection is finished, the telescopic motor is started to push the piston to pump the detected gas back to the electric cabinet. The detected gas does not escape in the detection process, so that the environmental pollution caused by the escape of SF6 gas and decomposition products thereof into the air is avoided. After the device carries out sampling detection on the detected gas, the detected gas can be pumped back to the original gas container, the detected gas does not escape in the detection process, and the environment is protected.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a detection pool, 2, a light source, 3, a spectrometer, 4, a telescopic motor, 401, a push rod, 5, a piston, 6, an air pipe, 7, a regulating valve, 8, a window sheet, 9, a focusing mirror, 10 and an electric cabinet.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, the present embodiment provides a pumpable gas detection apparatus, which includes a detection cell 1, a light source 2, a spectrometer 3, and a telescopic motor 4. The light source 2 and the spectrometer 3 are oppositely arranged at two ends of the detection cell 1 respectively, so that the spectrometer 3 can receive the light emitted by the light source 2 through the detection cell 1. The telescopic motor 4 is arranged on the outer side of the detection cell 1, the push rod 401 of the telescopic motor vertically penetrates through the side wall of the detection cell 1, and the end part of the push rod 401 can perform telescopic motion in the detection cell 1, so that the telescopic direction of the push rod 401 is perpendicular to the shortest light path between the light source 2 and the spectrometer 3. Be equipped with piston 5 in the detection pond 1, piston 5 and detection pond 1's inner wall sliding fit, and piston 5 seals the inner wall of detection pond 1, piston 5 and telescopic motor 4's push rod 401 mutually perpendicular and fixed connection. One side that deviates from flexible motor 4 on the detection pond 1 is equipped with trachea 6, trachea 6 and air supply intercommunication, be equipped with governing valve 7 on the trachea 6. In the usage scenario of this embodiment, the gas source is SF6 gas in the power cabinet 10, and the pressure of the gas is higher than atmospheric pressure.

When the gas detection device is used, the gas pipe 6 is communicated with the power cabinet 10, the regulating valve 7 is opened, under the action of gas pressure difference, SF6 gas enters the detection chamber and pushes the piston 5 to slide, and the SF6 gas to be detected is filled in the detection chamber. At this time, the light source 2 is turned on, and the detection light emitted from the light source 2 irradiates the decomposition products such as SF6 gas and SO2 and H2S generated by decomposition of SF6 gas in the detection chamber, and then enters the spectrometer 3, and the detection light is subjected to spectral analysis, whereby the decomposition condition of the SF6 gas to be measured can be obtained. After the detection is finished, the telescopic motor 4 is started to push the piston 5 to move, the detected gas is pumped back to the electric cabinet 10, and the detected gas is prevented from escaping into the air. Since SF6 gas is greenhouse gas, decomposition products SO2, H2S and the like also have certain destructive effect on the atmosphere, and SF6 gas detection of the power cabinet 10 is periodic inspection, SO that the device is used for detecting the power cabinet 10, the greenhouse gas release caused by multiple detections is avoided, and the atmospheric environment is protected.

On the basis of the above technical solution, the present embodiment can be further improved as follows.

In this embodiment, be equipped with transparent window 8 on the both ends of detection cell 1 respectively, window 8 and the tip sealing connection of detection cell 1, the one end that is close to spectrum appearance 3 on the detection cell 1 is equipped with focusing mirror 9, focusing mirror 9 is convex lens, and its one side towards light source 2 is the convex surface. The light of the light source 2 sequentially passes through the first window sheet 8, the detection cell 1, the second window sheet 8 and the focusing lens 9 and then reaches the spectrometer 3.

The window sheet 8 on the detection cell 1 is made of transparent JGS1 quartz glass, which is beneficial to the detection light of the light source 2 to irradiate the detected gas in the detection chamber to the maximum extent; and in the detection process, the window sheet 8, the detection chamber 1 and the piston 5 can form sealing to prevent gas leakage. The focusing mirror 9 focuses the detection light in the detection chamber, so that the spectrometer 3 can obtain the detection light to the maximum extent, and a more accurate detection result can be achieved.

In this embodiment, the light source 2 is a xenon lamp, which emits ultraviolet light as detection light.

Since the decomposition products such as SO2 and H2S generated by decomposition of SF6 gas have ultraviolet absorption characteristics, the detection principle of the present embodiment is to detect the decomposition products such as SO2 and H2S generated by decomposition of SF6 gas by using an ultraviolet difference method. The xenon lamp emits ultraviolet rays, the ultraviolet rays pass through the gas in the detection chamber and enter the spectrometer 3, and the change of the concentration of the SF6 gas can be obtained by analyzing the spectrum of the ultraviolet rays, so that the decomposition condition of the SF6 gas can be known.

In this embodiment, the regulating valve 7 is disposed on the air pipe 6 near the detection cell 1. In order to further evacuate the gas in the detection chamber after the detection is completed, the length of the gas pipe 6 can be reduced as appropriate, and the regulating valve 7 can be arranged to be as close to the detection chamber as possible, so that the gas after the detection is prevented from remaining in the gas pipe 6 and interfering with the next detection.

In this embodiment, a pressure reducing valve is used as the regulating valve 7. Before detection, the pressure reducing valve is released, and since the air pressure in the power cabinet 10 is higher than the air pressure in the detection chamber, the air in the power cabinet 10 enters the detection chamber through the pressure reducing valve. Due to the action of the pressure, the piston 5 is pushed to slide, so that the push rod 401 of the telescopic motor 4 retracts until reaching the maximum stroke of the piston 5 or the telescopic motor 4. At this time, the gas in the electric cabinet 10 is filled in the detection chamber, and the gas pressure in the detection chamber is the same as the gas pressure in the electric cabinet 10, so that the xenon lamp and the spectrometer 3 can be started for testing.

The working principle is as follows:

because the device is designed to prevent the measured gas from escaping to cause environmental pollution, the device can be connected with the detected electric cabinet 10 through the air pipe 6 for a long time. When the preliminary detection is carried out, the pressure reducing valve is opened firstly, so that the gas in the electric cabinet 10 enters the detection chamber through the gas pipe 6 and the pressure reducing valve, and the detected gas pushes the piston 5 to slide along the inner wall of the detection chamber until the SF6 gas to be detected is filled in the detection chamber because the gas pressure in the electric cabinet 10 is higher than the voltage in the detection chamber. Then, the xenon lamp and the spectrometer 3 are started, the xenon lamp emits ultraviolet light, the ultraviolet light irradiates the gas to be detected through the window 8, and then the ultraviolet light in the detection chamber is absorbed into the detection point of the spectrometer 3 through the focusing function of the focusing lens 9. In the embodiment, the decomposition product of the SF6 gas is detected by using the ultraviolet difference principle, and since the decomposition product of the SF6 gas, such as SO2, H2S and the like, has ultraviolet absorption characteristics, when the decomposition amount of the SF6 gas is increased, the decomposition condition of the SF6 gas can be detected by spectral analysis, SO that the condition of the insulating gas SF6 in the power cabinet 10 can be estimated. After the detection is finished, the push rod 401 of the telescopic motor 4 is driven to extend out, the push rod pushes the piston 5 to pump the detected gas in the detection chamber back to the electric cabinet 10, then the pressure reducing valve is closed, and the whole detection process is finished. Since the detection of the insulating gas in the power cabinet 10 is a periodic detection, the above detection process is repeated when the next period needs to be tested. The device does not discharge the gas to be tested before, during and after detection, and prevents SF6 gas and decomposition products thereof from dissipating into the air to cause environmental pollution.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The gas detection device capable of being pumped back is characterized by comprising a detection cell (1), a light source (2), a spectrometer (3) and a telescopic motor (4), wherein the light source (2) and the spectrometer (3) are oppositely arranged at two ends of the detection cell (1), the telescopic motor (4) is arranged at the outer side of the detection cell (1), and a push rod (401) of the telescopic motor vertically penetrates through the detection cell (1); a piston (5) is arranged in the detection pool (1), the piston (5) is in sliding fit with the inner wall of the detection pool (1), and the piston (5) is fixedly connected with a push rod (401) of a telescopic motor (4); one side that deviates from flexible motor (4) on detecting pond (1) is equipped with trachea (6), trachea (6) and air supply intercommunication are equipped with governing valve (7) on trachea (6).

2. The gas detection device that can pump back according to claim 1, characterized in that, the both ends of detecting cell (1) are equipped with window (8) respectively, window (8) and detecting cell (1) be airtight connection, the one end that is close to spectrum appearance (3) on detecting cell (1) is equipped with focusing mirror (9), the light of light source (2) arrives in spectrum appearance (3) after passing through first window (8), detecting cell (1), second window (8) and focusing mirror (9) in proper order.

3. A pumpable gas detection apparatus according to claim 2, wherein the focusing lens (9) is a convex lens, the side facing the light source (2) being convex.

4. The pumpable gas detection apparatus of claim 1, wherein the light source (2) is a xenon lamp.

5. A pumpable gas detection apparatus according to claim 1, wherein the regulating valve (7) is arranged on the gas pipe (6) close to the detection cell (1).

6. A pumpable gas detection apparatus according to claim 1, wherein the regulating valve (7) is a pressure reducing valve.

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