Electrical equipment gas insulation detection equipment based on photoacoustic spectrum technology

Abstract

The invention discloses electrical equipment gas insulation detection equipment based on a photoacoustic spectrometry technology, and relates to the technical field of gas detection.The electrical equipment gas insulation detection equipment comprises a machine body assembly and a top cover assembly, a detection bin is embedded in the top of the machine body assembly, and the detection bin comprises a bin body, a detection element, sound insulation cotton and a vacuum layer; and a detection element is fixedly mounted on the inner surface of the bin body. According to the electrical equipment gas insulation detection equipment based on the photoacoustic spectrometry technology, the detection bin is arranged, the interior of the detection bin is divided into four independent and non-interfering detection spaces, and after to-be-detected gas of electrical equipment is pumped into the bin body through a sucking pump, the gas in the four spaces can be detected respectively through detection elements; according to the improved detection equipment, the characteristic absorption spectrums of different gases are accurately measured and analyzed, so that the concentration information of various fault gases can be simultaneously obtained in one detection process, and richer data basis is provided for comprehensively evaluating the insulation state of electrical equipment.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection, and in particular to a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology. Background Art

[0002] Photoacoustic spectroscopy is a spectral technique based on the photoacoustic effect. As early as 1880, Bell discovered the photoacoustic effect through communication experiments, but it was not until the advent of lasers that the application of the photoacoustic effect developed rapidly. As an important branch of spectroscopy, photoacoustic spectroscopy is different from traditional spectroscopy in that it detects acoustic signals instead of optical signals after the interaction between light and tissue, thus overcoming many difficulties in sample analysis with traditional spectroscopy. Compared with traditional spectroscopy, photoacoustic spectroscopy detects ultrasonic signals generated by tissue absorption of light energy, and its strength directly reflects the amount of light energy absorbed by the material, thereby avoiding signal interference caused by reflection and scattering of light in the sample; at the same time, the irradiation power of the incident light can be appropriately increased for weakly absorbing samples to improve the signal-to-noise ratio.

[0003] Since photoacoustic spectroscopy has extremely high detection sensitivity, it can detect extremely low concentrations of gas. Therefore, in the prior art, photoacoustic spectroscopy is used to detect insulating gases in electrical equipment, because in electrical equipment, changes in the concentration of insulating gases often indicate the operating status or potential failures of the equipment. Photoacoustic spectroscopy can accurately measure the concentration of insulating gases and detect abnormal conditions in a timely manner, thereby avoiding equipment failures or accidents. The principle is: by irradiating the gas to be detected with a monochromatic modulated laser, the gas absorbs light energy, generates excitation and releases heat energy, thereby inducing periodic oscillations of the surrounding gas to form a photoacoustic signal; a weak sound signal detector is used to detect the sound signal to determine the concentration of the gas.

[0004] For example, the patent document with the publication number CN218938123U discloses a gas detection device based on photoacoustic spectroscopy, which is provided with a laser emission component, a first photoacoustic cell, an acoustic signal detection component, a signal amplification component, a phase detection component and a visible light emission component; the output end of the laser emission component is aligned with the incident end of the first photoacoustic cell; the acoustic signal detection component is accommodated in the first photoacoustic cell, and its output end is connected to the input end of the signal amplification component; the output end of the signal amplification component is connected to the input end of the phase detection component; the output end of the phase detection component is connected to the laser emission component; and the visible light emission component is used to emit visible light to the exit end of the first photoacoustic cell. By setting the visible light emission component to emit visible light to the exit end of the first photoacoustic cell, the visible light propagates to the laser emission component after passing through the first photoacoustic cell, forming a calibration optical path that coincides with the standard detection optical path, and adjusting the positions of the laser emission component and the first photoacoustic cell according to the calibration optical path, the calibration of the detection optical path can be achieved.

[0005] However, in actual use, due to the limitations of technical principles, existing gas insulation detection equipment can only detect multiple fault gases one by one when they exist at the same time, so as to avoid mutual interference between different gas signals, resulting in inaccurate detection results. This means that it is impossible to obtain the concentration information of multiple fault gases at the same time during a single detection process. Instead, multiple tests are required to obtain the concentration information of all fault gases, which seriously affects the detection efficiency of electrical equipment.

[0006] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing structure and shortcomings, and provides an electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology. Summary of the invention

[0007] The purpose of the present invention is to provide a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology, comprising a body assembly and a top cover assembly, a detection chamber is embedded on the top of the body assembly, and the detection chamber comprises a chamber body, a detection element, sound insulation cotton and a vacuum layer, a detection element is fixedly installed on the inner surface of the chamber body, and sound insulation cotton is fixed to the inner wall of the chamber body, and a vacuum layer is arranged inside the chamber body, an installation groove is opened inside the body assembly, and an exhaust assembly is arranged inside the installation groove, a protective net is fixedly connected to the inner wall of the installation groove, and one side of the protective net is flush with the back of the body assembly, the top cover assembly is fixedly installed on the top of the body assembly, and a hose assembly is fixedly connected to the top of the top cover assembly.

[0009] Furthermore, the body assembly includes a main body, a touch screen, a knob and a display light. The touch screen is fixedly installed on the front of the main body, and the knob is arranged on the front of the main body. The display light is embedded in the front of the main body, and the display light is located on the left side of the touch screen.

[0010] Furthermore, the body component also includes control keys, which are arranged on the front side of the main body, and the number of the control keys is ten, and the ten control keys are divided into two columns, and each column of the control keys includes five control keys arranged equidistantly.

[0011] Furthermore, the vacuum assembly includes a vacuum pump, a main ventilation pipe and an air bin, the air inlet of the vacuum pump is fixedly connected to the main ventilation pipe, and one end of the main ventilation pipe is fixedly connected to the air bin, and the air bin is fixedly installed on the inner top wall of the mounting groove by bolts.

[0012] Furthermore, the vacuum assembly also includes a branch ventilation pipe and an air control valve, one end of the branch ventilation pipe is connected to the outer wall of the air bin, and the other end of the branch ventilation pipe passes through the bottom of the detection bin and extends to the interior of the detection bin, and the other end of the branch ventilation pipe is fixedly connected to the air control valve.

[0013] Furthermore, the number of the branch ventilation pipes is four, and the four branch ventilation pipes are arranged in a circular array on the outside of the air bin with the top center of the air bin as the center.

[0014] Furthermore, the top cover assembly includes a sealing cover, a vacuum cover block, an air control valve 2 and a fastening bolt. The bottom of the sealing cover is fixedly connected to the main ventilation pipe, and the bottom center of the vacuum cover block is penetrated by an air control valve 2. A fastening bolt is provided at the top dead corner of the sealing cover, and the sealing cover is fixedly connected to the top of the body assembly through the fastening bolt.

[0015] Furthermore, the number of the vacuum cover blocks is four, and the four vacuum cover blocks are arranged in a rectangular array at the bottom of the sealing cover, and the sealing cover and the detection chamber form a mosaic structure through the vacuum cover blocks, and the shape and size of the vacuum cover blocks match the shape and size of the detection chamber.

[0016] Furthermore, the hose assembly includes an exhaust hose, an air control valve three, a suction nozzle and a micro suction cup, one end of the exhaust hose is fixedly connected to the air control valve two, and the other end of the exhaust hose is fixedly connected to the air control valve three, and the bottom of the air control valve three is fixedly connected to the suction nozzle, and micro suction cups are evenly arranged on the bottom of the suction nozzle.

[0017] Furthermore, pipe-wrapped piles are welded to the left and right outer walls of the body assembly, and rubber holders are fixedly installed to the left and right outer walls of the body assembly.

[0018] The present invention provides a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology, which has the following beneficial effects:

[0019] 1. The present invention is provided with a detection chamber, and the detection chamber is composed of a chamber body, a detection element, sound insulation cotton and a vacuum layer, and its interior is divided into four independent and non-interfering detection spaces. After the gas to be detected of the electrical equipment is pumped into the chamber body by a vacuum pump, the detection element can be used to detect the gas in the four spaces separately. The improved detection equipment can obtain the concentration information of multiple fault gases simultaneously in a single detection process by accurately measuring and analyzing the characteristic absorption spectra of different gases, thereby providing richer data basis for comprehensive evaluation of the insulation status of the electrical equipment.

[0020] 2. The present invention is provided with a hose assembly, and the suction nozzle can be placed at a specific sampling position according to the needs of use. With the help of the vacuum hose, the operator can simultaneously perform gas sampling on different positions of the electrical equipment, so as to facilitate targeted sampling as needed, or to avoid accidental errors, so as to improve the applicability and accuracy of the device. At the same time, the suction nozzle is partially adhered to the electrical equipment by using the micro suction cup at the bottom of the suction nozzle, which frees the operator's hands and avoids the position movement of the suction nozzle during use. In addition, since the hose assembly and the four spaces inside the detection chamber are arranged one by one, it is convenient for the operator to choose which hose assemblies to use according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology of the present invention;

[0022] Figure 2 It is a schematic diagram of the disassembly of the body component-top cover component structure of an electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology of the present invention;

[0023] Figure 3 It is a schematic diagram of a top cover assembly of a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to the present invention;

[0024] Figure 4 The present invention is a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology Figure 3 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 5 It is a schematic diagram of the side cross-sectional structure of a body component of a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology of the present invention;

[0026] Figure 6 The present invention is a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology Figure 5 Enlarged schematic diagram of the structure at point B in the middle.

[0027] In the figure: 1. Body assembly; 11. Main body; 12. Touch screen; 13. Knob; 14. Display light; 15. Control key; 2. Detection chamber; 21. Chamber body; 22. Detection element; 23. Sound insulation cotton; 24. Vacuum layer; 3. Installation slot; 4. Exhaust assembly; 41. Exhaust pump; 42. Main ventilation pipe; 43. Air chamber; 44. Branch ventilation pipe; 45. Air control valve one; 5. Protection net; 6. Top cover assembly; 61. Sealing cover; 62. Vacuum cover block; 63. Air control valve two; 64. Fastening bolt; 7. Hose assembly; 71. Exhaust hose; 72. Air control valve three; 73. Suction nozzle; 74. Micro suction cup; 8. Pipe pile; 9. Rubber holder. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology includes a body component 1 and a top cover component 6. A detection chamber 2 is embedded on the top of the body component 1, and the detection chamber 2 includes a chamber body 21, a detection element 22, sound insulation cotton 23 and a vacuum layer 24. The detection element 22 is fixedly installed on the inner surface of the chamber body 21, and the sound insulation cotton 23 is fixed to the inner wall of the chamber body 21, and the interior of the chamber body 21 is provided with a vacuum layer 24. The interior of the body component 1 is provided with a mounting groove 3, and the interior of the mounting groove 3 is provided with an exhaust component 4. The air extraction component 4 includes an air extraction pump 41, a main ventilation pipe 42 and an air bin 43. The air inlet of the air extraction pump 41 is fixedly connected to the main ventilation pipe 42, and one end of the main ventilation pipe 42 is fixedly connected to the air bin 43, and the air bin 43 is fixedly installed on the inner top wall of the installation groove 3 by bolts. The air extraction component 4 also includes a branch ventilation pipe 44 and an air control valve 45. One end of the branch ventilation pipe 44 is connected to the outer wall of the air bin 43, and the other end of the branch ventilation pipe 44 passes through the bottom of the detection bin 2 and extends to the inside of the detection bin 2, and the other end of the branch ventilation pipe 44 is connected to the outer wall of the detection bin 2. The end is fixedly connected with an air control valve 1 45, the number of branch ventilation pipes 44 is four, and the four branch ventilation pipes 44 are arranged in a circular array on the outside of the air bin 43 with the top circle center of the air bin 43 as the center, the inner wall of the mounting groove 3 is fixedly connected with a protective net 5, and one side of the protective net 5 is flush with the back of the body component 1, the top cover component 6 is fixedly installed on the top of the body component 1, and the top cover component 6 includes a sealing cover 61, a vacuum cover block 62, an air control valve 2 63 and a fastening bolt 64, the bottom of the sealing cover 61 is fixedly connected with the main ventilation pipe 42, and the vacuum cover block The bottom center of the sealing cover 62 is penetrated by an air control valve 2 63, the top dead corner of the sealing cover 61 is provided with a fastening bolt 64, and the sealing cover 61 is fixedly connected to the top of the body assembly 1 through the fastening bolt 64, the number of vacuum cover blocks 62 is four, and the four vacuum cover blocks 62 are arranged in a rectangular array at the bottom of the sealing cover 61, and the sealing cover 61 forms a chimeric structure with the detection chamber 2 through the vacuum cover block 62, and the shape and size of the vacuum cover block 62 match the shape and size of the detection chamber 2, and the top of the top cover assembly 6 is fixedly connected with a hose assembly 7;

[0030] The specific operation is as follows: the operator determines the number of gas types to be detected, and places one end of the hose assembly 7 required for detection on the electrical equipment to be detected in turn, then operates the body assembly 1 to start the air pump 41, and simultaneously opens the corresponding air control valve 1 45 and air control valve 2 63, the air flow will enter the detection chamber 2 from the electrical equipment along the hose assembly 7 and through the opened air control valve 2 63, the original air in the detection chamber 2 will pass through the air control valve 1 45 and along the branch ventilation pipe 44 into the air chamber 43, and then be extracted along the main ventilation pipe 42 The air pump 41 extracts and discharges, and after the gas from the electrical equipment enters the detection chamber 2, the air pump 41 is stopped, and the air control valve 1 45 and the air control valve 2 63 are closed at the same time, the gas is sealed in the chamber body 21, and the gas is detected by the detection element 22. During the detection process, the sound insulation cotton 23 and the vacuum layer 24 can have a good sound insulation effect, so that the four spaces inside the chamber body 21 can be independent and non-interfering during detection, thereby achieving the purpose of synchronous detection, so that the concentration information of multiple fault gases can be obtained simultaneously during one detection process.

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, the body assembly 1 includes a main body 11, a touch screen 12, a knob 13 and a display light 14. The touch screen 12 is fixedly installed on the front of the main body 11, and the knob 13 is arranged on the front of the main body 11. The display light 14 is embedded and installed on the front of the main body 11, and the display light 14 is located on the left side of the touch screen 12. The body assembly 1 also includes a control key 15, which is arranged on the front of the main body 11, and the number of the control keys 15 is ten, and the ten control keys 15 are divided into two columns, each column of the control keys 15 includes five equidistantly arranged control keys 15, and the interior of the body assembly 1 is opened The mounting groove 3 is provided with an air extraction component 4 inside the mounting groove 3, the top of the top cover component 6 is fixedly connected with a hose component 7, the hose component 7 includes an air extraction hose 71, an air control valve 3 72, a suction nozzle 73 and a micro suction cup 74, one end of the air extraction hose 71 is fixedly connected with the air control valve 2 63, and the other end of the air extraction hose 71 is fixedly connected with the air control valve 3 72, and the bottom of the air control valve 3 72 is fixedly connected with the suction nozzle 73, and the bottom of the suction nozzle 73 is evenly provided with micro suction cups 74, the left and right outer walls of the body component 1 are welded with pipe piles 8, and the left and right outer walls of the body component 1 are fixedly installed with rubber holders 9;

[0032] The specific operation is as follows. After the operator determines the gas sampling position of the electrical equipment, the operator can take out the air control valve 3 72 from the rubber holder 9 and place the suction nozzle 73 at the specific sampling position. The operator can also use the micro suction cup 74 at the bottom of the suction nozzle 73 to partially adhere the suction nozzle 73 to the electrical equipment according to the needs of use. While freeing the operator's hands, the design of the air extraction hose 71 also enables the operator to simultaneously perform gas sampling on different positions of the electrical equipment, so as to facilitate targeted sampling as needed, or to avoid accidental errors, thereby further improving the applicability and accuracy of the device. The hose assembly 7 is arranged one-to-one with the four spaces inside the detection chamber 2, so that the operator can choose which hose assemblies 7 to use according to needs. With the pipe pile 8 and the rubber holder 9 around the outer wall of the body assembly 1, the hose assembly 7 can be quickly stored after use. At the same time, by arranging the touch display screen 12, the knob 13, the display light 14 and the control key 15 on the front of the main body 11, the entire device is easy to operate and use.

[0033] In summary, combined Figure 1-Figure 6 As shown, the working principle of the electrical equipment gas insulation detection equipment based on photoacoustic spectroscopy technology is as follows: first, the operator needs to determine the number of gas types to be detected and the specific gas sampling position, and then choose which hose assemblies 7 to use, and take out the gas control valve three 72 from the rubber holder 9, and then place the suction nozzle 73 at the specific sampling position. At the same time, according to the needs of use, the suction nozzle 73 is partially adhered to the electrical equipment using the micro suction cup 74 at the bottom of the suction nozzle 73, and then the body assembly 1 is operated. By operating the touch display screen 12, knob 13, display light 14 and control key 15 on the front of the main body 11, the air pump 41 is started, and the corresponding gas control valve one 45 and gas control valve two 63 are opened at the same time, and the air flow will be from The electrical equipment enters the detection chamber 2 along the hose assembly 7 and through the opened air control valve 2 63. The original air in the detection chamber 2 will pass through the air control valve 1 45 and along the branch ventilation pipe 44 into the gas chamber 43, and then be extracted and discharged by the vacuum pump 41 along the main ventilation pipe 42. After the gas from the electrical equipment enters the detection chamber 2, the vacuum pump 41 is stopped, and the air control valve 1 45 and the air control valve 2 63 are closed at the same time to seal the gas in the chamber body 21, and the gas is detected by the detection element 22. During the detection process, the four spaces inside the chamber body 21 are separated by the sound insulation cotton 23 and the vacuum layer 24, so that each space can be detected independently and synchronously without interfering with each other, so as to obtain the concentration information of multiple fault gases at the same time.

[0034] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology, comprising a body component (1) and a top cover component (6), characterized in that: A detection chamber (2) is embedded on the top of the body component (1), and the detection chamber (2) includes a chamber body (21), a detection element (22), sound insulation cotton (23) and a vacuum layer (24); the detection element (22) is fixedly mounted on the inner surface of the chamber body (21), and the sound insulation cotton (23) is fixedly mounted on the inner wall of the chamber body (21), and a vacuum layer (24) is arranged inside the chamber body (21); a mounting groove (3) is opened inside the body component (1), and an exhaust assembly (4) is arranged inside the mounting groove (3); a protective net (5) is fixedly connected to the inner wall of the mounting groove (3), and one side of the protective net (5) is flush with the back of the body component (1); the top cover assembly (6) is fixedly mounted on the top of the body component (1), and a hose assembly (7) is fixedly connected to the top of the top cover assembly (6).

2. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 1 is characterized in that: The body assembly (1) comprises a main body (11), a touch screen (12), a knob (13) and a display light (14); the touch screen (12) is fixedly mounted on the front of the main body (11), and the knob (13) is arranged on the front of the main body (11); the display light (14) is embedded and mounted on the front of the main body (11), and the display light (14) is located on the left side of the touch screen (12).

3. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 2 is characterized in that: The body component (1) also includes control keys (15), which are arranged on the front side of the main body (11). The number of the control keys (15) is ten, and the ten control keys (15) are divided into two columns, and each column of the control keys (15) includes five control keys (15) arranged at equal intervals.

4. The electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology according to claim 1 is characterized in that: The air extraction assembly (4) comprises an air extraction pump (41), a main ventilation pipe (42) and an air bin (43); an air inlet of the air extraction pump (41) is fixedly connected to the main ventilation pipe (42), and one end of the main ventilation pipe (42) is fixedly connected to the air bin (43); and the air bin (43) is fixedly mounted on the inner top wall of the mounting groove (3) by means of bolts.

5. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 4 is characterized in that: The air extraction assembly (4) further comprises a branch ventilation pipe (44) and an air control valve (45); one end of the branch ventilation pipe (44) is connected to the outer wall of the gas chamber (43); the other end of the branch ventilation pipe (44) passes through the bottom of the detection chamber (2) and extends to the interior of the detection chamber (2); and the other end of the branch ventilation pipe (44) is fixedly connected to the air control valve (45).

6. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 5, characterized in that: The number of the branch ventilation pipes (44) is four, and the four branch ventilation pipes (44) are arranged in a circular array outside the air bin (43) with the top circle center of the air bin (43) as the center.

7. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 1 is characterized in that: The top cover assembly (6) comprises a sealing cover (61), a vacuum cover block (62), a second air control valve (63) and a fastening bolt (64); the bottom of the sealing cover (61) is fixedly connected to the main ventilation pipe (42), and the center of the bottom of the vacuum cover block (62) is provided with the second air control valve (63); the top dead corner of the sealing cover (61) is provided with a fastening bolt (64), and the sealing cover (61) is fixedly connected to the top of the machine body assembly (1) via the fastening bolt (64).

8. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 7 is characterized in that: The number of the vacuum cover blocks (62) is four, and the four vacuum cover blocks (62) are arranged in a rectangular array at the bottom of the sealing cover (61), and the sealing cover (61) and the detection chamber (2) form a chimeric structure through the vacuum cover blocks (62), and the shape and size of the vacuum cover blocks (62) match the shape and size of the detection chamber (2).

9. The electrical equipment gas insulation detection device based on photoacoustic spectroscopy technology according to claim 8, characterized in that: The hose assembly (7) comprises an air extraction hose (71), a third air control valve (72), a suction nozzle (73) and a micro suction cup (74); one end of the air extraction hose (71) is fixedly connected to the second air control valve (63), and the other end of the air extraction hose (71) is fixedly connected to the third air control valve (72); the bottom of the third air control valve (72) is fixedly connected to the suction nozzle (73), and the bottom of the suction nozzle (73) is evenly provided with micro suction cups (74).

10. The gas insulation detection device for electrical equipment based on photoacoustic spectroscopy technology according to claim 1, characterized in that: Pipe piles (8) are welded to the left and right outer walls of the body component (1), and rubber clamping seats (9) are fixedly installed to the left and right outer walls of the body component (1).

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