SF6 gas decomposer photoacoustic spectrum detection device and detection method

Abstract

The invention discloses an SF6 gas decomposer photoacoustic spectrum detection device and method, and belongs to the technical field of detection devices.The detection device comprises a main body shell and a detector body, a baffle is arranged in the main body shell, two sets of protection plates are clamped in the main body shell, and a first protection cavity and a second protection cavity are formed; the detector body is installed in the first protection cavity, an air inlet pipe and an air outlet pipe are arranged on the detector body, an air inlet assembly is arranged in the second protection cavity, and the air inlet pipe is connected with the air inlet assembly; a temperature control assembly is arranged in the first protection cavity and located below the detector body. According to the invention, two groups of relatively closed protection cavities are arranged, various interference factors in an external environment can be effectively blocked through the protection cavities, and the detector body is always in a dry environment; meanwhile, a temperature control device is further arranged in the protection cavity, so that the detector body can work at a proper temperature, normal operation of the detector body is guaranteed, and accuracy and stability of a detection result are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection devices, and more specifically, particularly relates to a photoacoustic spectrum detection device and a detection method for SF6 gas decomposition products. Background Art

[0002] Under certain conditions, SF6 gas will decompose and produce different decomposition products. The appearance of these decomposition products is often related to abnormal conditions inside the power equipment. In the monitoring of power equipment, these decomposition products are detected through photoacoustic spectroscopy detection devices. This can quickly detect the decomposition products of SF6 gas caused by equipment failure, improve the timeliness of fault detection, and provide support for subsequent equipment maintenance and fault diagnosis.

[0003] However, in traditional detection devices, the detector body is directly exposed to the external environment, which makes it easy to be disturbed by external factors. Especially when the temperature changes greatly, the detector body is directly exposed to the outside and lacks effective protection. It is easily affected by temperature fluctuations, which may cause the performance of sensitive elements inside the detector body to change, and may further lead to a reduction in the stability and accuracy of the detection device. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a photoacoustic spectroscopy detection device for SF6 gas decomposition products, so as to solve the technical problem that the traditional photoacoustic spectroscopy detection device is easily affected by external factors such as temperature and humidity, resulting in a decrease in detection accuracy and a decrease in the stability and accuracy of the detection device.

[0005] The present invention adopts the following technical solution.

[0006] The first aspect of the present invention discloses a photoacoustic spectrum detection device for SF6 gas decomposition products, comprising: a main body shell and a detector body, wherein a baffle is arranged in the main body shell, and two sets of protection plates are clamped in the main body shell and located on both sides above the baffle, forming a first protection cavity and a second protection cavity with the main body shell, wherein the protection cavity is used to block interference factors in the external environment and place the detector body in a dry environment;

[0007] The detector body is installed in the first protective cavity, an air inlet pipe and an air outlet pipe are arranged on the detector body, an air inlet assembly is arranged in the second protective cavity, the air inlet pipe is connected to the air inlet assembly, and the air inlet assembly is used to collect and store the detection gas;

[0008] A temperature control component is provided in the first protective cavity. The temperature control component is located below the detector body. The temperature control component is used to control the working temperature of the detector body to ensure the accuracy and stability of the detection result.

[0009] Preferably, the air intake assembly comprises: a collecting pipe and a storage tank, a mounting frame is provided on the main shell, and the collecting pipe is clamped on the mounting frame;

[0010] Both ends of the collecting pipe are provided with card slots, and two groups of dustproof nets are respectively clamped in the two groups of card slots and detachably connected to the collecting pipe; a mounting seat is provided in the main shell, and the storage tank is installed on the mounting seat.

[0011] Preferably, the air intake assembly also includes a first air pump, which is respectively connected to the collecting pipe and the storage tank through connecting pipes, and the collecting pipe is connected and communicated with the storage tank; a first connecting member and a second connecting member are provided on the baffle, and the first connecting member is respectively connected to the air intake pipe and the storage tank through connecting pipes.

[0012] Preferably, a gas injection port is provided on one side of the main shell, and the gas injection port is connected to the first connecting piece through a connecting pipe. Solenoid valves are provided between the first connecting piece, the storage tank and the gas injection port, and the solenoid valve is sleeved on the connecting pipe; an exhaust port is provided on the other side of the main shell, and the second connecting piece is respectively connected to the exhaust port and the exhaust pipe through a connecting pipe.

[0013] Preferably, a second air pump is provided in the second protective cavity, the second air pump is connected to the storage tank and the exhaust port respectively through connecting pipes, and the exhaust port is connected to the second connecting member through the connecting pipe.

[0014] Preferably, the temperature control component includes a heat-insulating layer, a fixing groove is provided in the main shell, the heat-insulating layer is clamped in the fixing groove and contacts with the detector body;

[0015] A heating wire is arranged in the thermal insulation layer, an installation box is arranged in the main shell, a controller and a temperature control module are arranged in the installation box, and the temperature control module is electrically connected to the heating wire; a battery is also arranged in the first protective cavity, and the battery can be connected to an external power supply.

[0016] Preferably, one group of the protective plates is provided with an installation frame, and the operation panel is mounted in the installation frame. The operation panel is electrically connected to the controller and the detector body respectively. A temperature sensor is also provided in the first protective cavity, and the temperature sensor is installed on one side of the baffle.

[0017] Preferably, the temperature control component also includes a semiconductor refrigeration plate, a through slot is provided on the main shell, the semiconductor refrigeration plate is clamped in the through slot, a heat conducting plate is provided on the top of the through slot, and the two sides of the heat conducting plate are respectively in contact with the detector body and the semiconductor refrigeration plate; a mounting plate is provided at the bottom of the through slot, a fan is provided under the main shell, the fan is mounted on the mounting plate, and a heat dissipation groove is also provided on one side of the main shell.

[0018] Preferably, a main body cover is arranged above the main body shell, the main body cover is rotatably connected to the main body shell, a placement box is arranged between the main body cover and the main body shell, and the placement box is clamped in the main body shell.

[0019] The second aspect of the present invention discloses a method for detecting SF6 gas decomposition products, based on the SF6 gas decomposition product photoacoustic spectrum detection device, comprising the following steps:

[0020] Step 1: Preparing the device, place it in a location with a stable environment and no obvious interference source, connect it to an external power source for charging, and check whether the device is operating normally;

[0021] Step 2: Select the gas injection method. Select the method for the decomposition products to enter the detector body according to actual needs. If it is necessary to collect and re-detect through the air intake component, the first air pump can be started to make the collection tube start to collect gas; if a small amount of specific decomposition products need to be detected and analyzed immediately, they can be directly injected through the gas injection port;

[0022] Step 3: Detection is started, and the gas to be detected is guided to the detector body. If the gas is injected through the air intake assembly, the gas enters the detector body from the storage tank through the connecting pipe; if the gas is injected through the gas injection port, it directly enters the detector body; at the same time, the temperature control assembly located in the first protective cavity starts to work, and the temperature sensor monitors the temperature in real time. If the temperature is too low, the heating wire works to increase the temperature; if the temperature is too high, the semiconductor refrigeration plate starts to dissipate heat through the heat conduction plate and the fan;

[0023] Step 4: Reading measurement data. The detector body detects and analyzes the gas. After the detection is completed, the data is transmitted to the controller. The controller processes the signal and transmits the detection result to the operation panel. The user can read and record the detection data on the operation panel.

[0024] Step 5: After the test is completed, shut down all components through the operation panel and keep the device properly.

[0025] Compared with the prior art, the beneficial effects of the present invention include at least:

[0026] 1. The main body shell of the present invention is provided with a baffle, and two groups of protective plates are clamped in the main body shell. The two groups of protective plates are located on both sides of the baffle. The main body shell, the protective plates and the baffle cooperate to form a relatively closed first protective cavity and a second protective cavity. The detector body is installed in the first protective cavity, and the air intake assembly is in the second protective cavity. The protective cavity can provide an independent and stable working environment for both, effectively blocking various interference factors in the external environment, so that the detector body is always in a dry environment, which can ensure its normal operation and ensure the accuracy and stability of the test results. At the same time, the storage tank of the collection pipe in the air intake assembly, with a dustproof net and an air pump, can not only efficiently collect and store the test gas, but also ensure the purity of the gas and avoid the interference of impurities on the test results. An air injection port is provided on one side of the main shell, and the storage tank and the air injection port are connected to the first connector through a connecting pipe. The way in which the decomposition products enter the detector body can be selected according to the use requirements. The decomposition products can be collected through the air intake assembly and then enter the detector body through the air intake assembly; the decomposition products can also be injected through the air injection port, which is more suitable for real-time detection and analysis of a small amount of specific decomposition products. These two optional methods can meet different detection scenarios and requirements, greatly improving the applicability and practicality of the detection device.

[0027] 2. The present invention can control the temperature of the detector body when in use by providing a temperature control component in the first protective cavity. No matter how the external temperature changes, the detector body can be kept at a suitable and stable working temperature, thereby improving the detection accuracy. The insulation layer in the temperature control component is in contact with the detector body, and a heating wire is provided in the insulation layer. When the external temperature is too low, the heating wire can work to increase the temperature around the detector body and maintain it in an ideal working range. At the same time, a semiconductor refrigeration plate is provided in the through groove on the main shell, and is indirectly in contact with the detector body through the heat conducting plate, so that heat can be effectively conducted; when the ambient temperature is too high, the semiconductor refrigeration plate is started, and the heat is quickly conducted out through the heat conducting plate, thereby creating a low temperature and stable working condition for the detector body, ensuring the stable performance of its performance and the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention after assembly;

[0029] Figure 2 It is a schematic diagram of the structure after the disassembly of the first embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the structure after the splitting of the second embodiment of the present invention;

[0031] Figure 4 is a second state diagram of the present invention;

[0032] Figure 5 is a cross-sectional view of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the main shell;

[0034] Figure 7 is a schematic diagram of the top structure of the collecting tube;

[0035] Figure 8 It is a schematic diagram of the structure of the detector body;

[0036] Fig. 9 It is the principle block diagram of the temperature control component.

[0037] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0038] 11. Main body shell; 12. Baffle; 13. Mounting frame; 14. Mounting seat; 15. Air injection port; 16. Exhaust port; 17. Fixing groove; 18. Mounting box; 19. Main body cover; 21. Detector body; 22. Protective plate; 23. Inlet pipe; 24. Exhaust pipe; 25. Controller; 26. Temperature control module; 27. Mounting frame; 28. Operation panel; 29. ​​Temperature sensor; 31. First protective cavity; 32. Second protective cavity; 33. Placement box; 41. Collection tube; 42. Storage tank; 43. Card slot; 44. Dustproof net; 45. First air pump; 46. First connecting piece; 47. Second connecting piece; 48. Second air pump; 51. Insulation layer; 52. Semiconductor refrigeration plate; 53. Through groove; 54. Heat conducting plate; 55. Mounting plate; 56. Fan; 57. Heat dissipation groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0040] Embodiment 1:

[0041] like Figures 1 to 9 As shown, the present invention provides a photoacoustic spectroscopic detection device for SF6 gas decomposition products, including a main housing 11 and a detector body 21. A baffle 12 is arranged in the main housing 11, which plays a partitioning role in the internal space. Two groups of protective plates 22 are clamped in the main housing 11, located on both sides of the baffle 12. Through the cooperation between the main housing 11, the baffle 12 and the two groups of protective plates 22, two independent first protective cavities 31 and second protective cavities 32 are formed.

[0042] The detector body 21 is installed in the first protective cavity 31, and can be free from external interference in this relatively independent space, thereby ensuring the accuracy and stability of the detection work. The detector body 21 is specially provided with an air inlet pipe 23 and an air outlet pipe 24 for the inlet and outlet of gas.

[0043] The air intake assembly in the second protective cavity 32 is connected to the air intake pipe 23, which not only ensures that the gas can be smoothly transmitted from the air intake assembly to the detector body 21, but also realizes functional zoning in the structure, so that the air intake and detection processes do not interfere with each other, thereby improving the operation efficiency and reliability of the entire device. At the same time, a temperature control assembly is also provided in the first protective cavity 31, and the temperature control assembly is located below the detector body 21. The temperature control assembly can directly adjust the temperature of the bottom of the detector body 21, thereby effectively controlling the temperature environment of the detector body 21 when in use. Whether the external temperature is too high or too low, this temperature control assembly can play a key role, ensuring that the detector body 21 is always in a suitable and stable operating temperature range, providing a guarantee for the accuracy of the detection results and the stable operation of the device.

[0044] It is worth noting that the detector body 21 can adopt a Thermo Scientific iCAP 7400ICP-OES detector.

[0045] like Figure 2 , Figures 6 to 8 As shown, the air intake assembly includes a collecting pipe 41 and a storage tank 42. A mounting bracket 13 is provided on the main shell 11, and the collecting pipe 41 is clamped on this mounting bracket 13, thereby ensuring the stability of its position. Slots 43 are provided at both ends of the collecting pipe 41, and two groups of dustproof nets 44 are respectively clamped in these two groups of slots 43, and a detachable connection is adopted between the collecting pipe 41. The cleaning and replacement of the dustproof net 44 is convenient to ensure that it always maintains a good dustproof effect. At the same time, a mounting seat 14 is provided inside the main shell 11, and the storage tank 42 is located in the second protective cavity 32 and is installed on this mounting seat 14, which ensures the stability of the storage tank 42 during operation.

[0046] The air intake assembly also includes a first air pump 45, which is installed in the second protective cavity 32. The first air pump 45 is connected to the collection pipe 41 and the storage tank 42 respectively through a connecting pipe, so that the decomposed product can be smoothly transmitted between them. In addition, the collection pipe 41 and the storage tank 42 are connected and connected to form a continuous gas flow channel. A first connecting member 46 and a second connecting member 47 are arranged on the baffle 12. The first connecting member 46 is connected to the air intake pipe 23 and the storage tank 42 respectively through a connecting pipe, ensuring the smooth transmission of gas from the storage tank 42 to the detector body 21. A gas injection port 15 is arranged on one side of the main housing 11, and the gas injection port 15 is connected to the first connecting member 46 through a connecting pipe. In addition, solenoid valves are arranged between the first connecting member 46 and the storage tank 42 and the gas injection port 15, and these solenoid valves are sleeved on the connecting pipe to control the flow and on-off of the gas. When the first air pump 45 is running, the decomposed products are collected through the collection pipe 41 and transported to the storage tank 42, the solenoid valve between the storage tank 42 and the first connecting member 46 is opened, and the solenoid valve between the gas injection port 15 and the first connecting member 46 is closed, so that the decomposed products in the storage tank 42 can smoothly enter the detector body 21. When the decomposed products are injected directly through the gas injection port 15, it is opposite to the above-mentioned solenoid valve opening state. An exhaust port 16 is provided on the other side of the main housing 11, and the second connecting member 47 is respectively connected to the exhaust port 16 and the gas outlet pipe 24 through a connecting pipe, thereby forming a complete gas inlet and outlet circulation system, ensuring the control of the intake and exhaust processes, and improving the operating efficiency and accuracy of the entire detection device.

[0047] like Figure 2 , Figure 6 , Fig. 9 As shown, the temperature control component includes a heat preservation layer 51, a fixing groove 17 is provided in the main shell 11, and the heat preservation layer 51 is stuck in the fixing groove 17 and is in direct contact with the detector body 21, which helps to minimize heat loss and improve the heat preservation effect. A heating wire is arranged inside the heat preservation layer 51, which can generate heat to provide a warm working environment for the detector body 21. At the same time, an installation box 18 is also arranged inside the main shell 11, and a controller 25 and a temperature control module 26 are arranged in this installation box 18. The controller 25 can adopt the STM32F4 series controller; the temperature control module 26 and the heating wire are electrically connected to realize temperature control, and the temperature control module 26 can adopt the MAX1978 temperature control module.

[0048] In addition, the first protective cavity 31 is also equipped with a battery. The battery has a flexible power supply mode. It can not only work independently, but also be connected to an external power supply to meet the power requirements in different scenarios. A mounting frame 27 is provided on one set of protective plates 22, and an operation panel 28 is mounted in this mounting frame 27. The operation panel 28 is electrically connected to the controller 25 and the detector body 21, respectively, so that the user can conveniently operate and monitor the device. A temperature sensor 29 is also provided in the first protective cavity 31. It is installed on one side of the baffle 12 and can sense the internal temperature changes in real time, providing key data support for temperature control. The temperature sensor 29 can use a TMP117 temperature sensor.

[0049] The temperature control component also includes a semiconductor refrigeration plate 52. A through slot 53 is provided on the main shell 11. The semiconductor refrigeration plate 52 is stuck in this through slot 53. A heat conducting plate 54 is provided on the top of the through slot 53. The two sides of the heat conducting plate 54 are in contact with the detector body 21 and the semiconductor refrigeration plate 52 respectively, ensuring that the heat can be quickly conducted. A mounting plate 55 is provided at the bottom of the through slot 53. A fan 56 is provided below the main shell 11. The fan 56 is installed on the mounting plate 55. When the semiconductor refrigeration plate 52 is working, the heat generated can be discharged quickly by the fan 56. A heat dissipation groove 57 is also provided on one side of the main shell 11, which further enhances the heat dissipation effect, ensures that the device can operate stably in a high temperature environment, and maintains the detector body 21 in a suitable operating temperature range, thereby ensuring the accuracy of the detection results and the reliability of the device.

[0050] like Figure 4 As shown, a main body cover plate 19 is arranged above the main body shell 11, and the main body cover plate 19 is rotatably connected to the main body shell 11, so that the opening and closing operation of the main body cover plate 19 is flexible and convenient. A placement box 33 is arranged between the main body cover plate 19 and the main body shell 11. The placement box 33 is stuck in the main body shell 11, and its position is stable and not easy to shake. The placement box 33 can be used to store some small tools, spare parts or related test record cards that may be used in the detection process. When these items need to be used, they can be quickly taken out from the placement box 33, which improves work efficiency. At the same time, the existence of the placement box 33 also enables the relevant items to be properly stored and managed, avoiding loss or confusion.

[0051] Embodiment 2:

[0052] Based on the SF6 gas decomposition product photoacoustic spectroscopic detection device provided in the first embodiment of the present application, the second embodiment of the present application proposes a SF6 gas decomposition product photoacoustic spectroscopic detection device. This second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment. The second embodiment of the present invention will be further described below.

[0053] like Figure 3 As shown, a gas injection port 15 is provided on one side of the main shell 11, and a gas exhaust port 16 is correspondingly provided on the other side of the main shell 11. The gas injection port 15 is connected to the first connecting member 46 through a connecting pipe, thereby constructing a gas injection channel. A solenoid valve is provided between the first connecting member 46, the storage tank 42 and the gas injection port 15, and the solenoid valve is sleeved on the connecting pipe. The existence of the solenoid valve plays a key role in the flow control of the gas. They can be opened or closed according to actual needs, thereby effectively adjusting the injection amount and injection timing of the gas.

[0054] A second air pump 48 is also provided in the second protection chamber 32, and the second air pump 48 is connected to the storage tank 42 and the exhaust port 16 respectively through a connecting pipe. It can provide power for the discharge of gas, ensure that the gas can flow smoothly from the storage tank 42 to the exhaust port 16, and can extract the decomposition products in the storage tank 42 cleanly to avoid the mixing of multiple decomposition products. In addition, the exhaust port 16 is also connected to the second connecting member 47 through a connecting pipe, forming a complete gas circulation path, making the flow of gas inside the device more orderly and controllable.

[0055] The difference between the second embodiment and the first embodiment is that a second air pump 48 is provided in the second protection cavity 32, and the second air pump 48 connects the storage tank 42 and the exhaust port 16 respectively through a connecting pipe, so that the storage tank 42 and the exhaust port 16 are connected. When the second air pump 48 is running, the decomposition products in the storage tank 42 can be extracted and transported to the exhaust port 16, and then discharged from the exhaust port 16 to the outside of the equipment, which can effectively avoid the residue of various decomposition products in the storage tank 42, ensure that the decomposition products can be discharged as thoroughly as possible, keep the inside of the storage tank 42 clean and unobstructed, not only improve the use efficiency of the storage tank 42, but also provide good basic conditions for the next detection and collection work, and ensure the accuracy and stability of the entire detection process. The remaining conditions are consistent with those of the first embodiment, so this embodiment will not be repeated.

[0056] The present invention also provides a method for using a photoacoustic spectrum detection device for SF6 gas decomposition products, comprising the following steps:

[0057] Step 1: Preparing the device, place it in a location with a stable environment and no obvious interference source, connect it to an external power source for charging, and check whether the device is operating normally;

[0058] Step 1 specifically includes: First, place the device in a suitable location. This location should ensure that the surrounding environment is stable and there are no obvious interference sources. Before testing, it is necessary to carefully check each component of the device. If the battery in the device is low, the battery can be connected to an external power source for charging. This can ensure that the device can operate normally without an external power source, relying on the power stored in the battery, and provide reliable power guarantee for the testing work;

[0059] Step 2: Select the gas injection method. Select the method for the decomposition products to enter the detector body 21 according to actual needs. If it is necessary to collect and re-detect through the air intake component, the first air pump 45 can be started to make the collection tube 41 start to collect gas; if a small amount of specific decomposition products need to be detected and analyzed immediately, they can be directly injected through the gas injection port 15;

[0060] Step 2 specifically includes: according to the actual detection needs, flexibly select the way for the decomposition products to enter the detector body 21; if it is necessary to collect and then detect through the air intake component, the first air pump 45 can be started. When the first air pump 45 is started, the collection tube 41 begins to collect gas efficiently; in the process of the gas entering the collection tube 41, it will first be filtered by the dustproof net 44, which can effectively remove impurities in the gas and ensure the purity of the gas entering the storage tank 42. The filtered gas smoothly enters the storage tank 42 for storage; if a small amount of specific decomposition products need to be immediately detected and analyzed, they can be directly injected through the gas injection port 15. In this case, it is necessary to carefully adjust the state of the solenoid valve between the gas injection port 15 and the storage tank 42 and the first connecting piece 46 to ensure that the gas can be smoothly injected to prepare for subsequent detection work;

[0061] Step 3: Start the test;

[0062] The gas to be detected is guided to the detector body 21. If the gas is injected through the air intake assembly, when the gas in the storage tank 42 is ready, the solenoid valve between the storage tank 42 and the first connecting piece 46 is opened, and the solenoid valve between the gas injection port 15 and the first connecting piece 46 is closed at the same time, so that the gas can smoothly enter the detector body 21 from the storage tank 42 through the connecting pipe; if the gas is injected through the gas injection port 15, it can directly enter the detector body 21; at this time, the temperature control component located in the first protective cavity 31 begins to play an important role, and the temperature sensor 29 will monitor the temperature in real time. Once the temperature is too low, the heating wire will work immediately to increase the temperature of the surrounding environment and create a suitable working temperature for the detector body 21; if the temperature is too high, the semiconductor refrigeration plate 52 will start, and the heat will be quickly transferred out through the heat conduction plate 54. At the same time, the fan 56 accelerates the heat dissipation to ensure that the detector body 21 is always at a suitable and stable working temperature, thereby ensuring the accuracy and stability of the detection results;

[0063] Step 4: Read the measurement data;

[0064] The detector body 21 performs comprehensive detection and analysis on the gas. After the detection is completed, the data will be transmitted to the controller 25. The controller 25 will accurately process the received signal and transmit the processed detection result to the operation panel 28. The user can conveniently read and record the detection data on the operation panel 28, providing accurate data support for subsequent data analysis and processing;

[0065] Step 5: Detection completed;

[0066] When the inspection work is completed, the operation panel 28 is used to shut down the operation of all components and the device enters the standby state. In order to ensure the proper storage of the device, some small tools, spare parts, etc. can be placed in the placement box 33 between the main cover 19 and the main shell 11. This not only facilitates the quick finding of the required tools and parts when used next time, but also avoids the loss or damage of these items, so as to be fully prepared for the next inspection work.

[0067] Compared with the prior art, the beneficial effects of the present invention include at least:

[0068] 1. A baffle is provided in the main shell, and two sets of protective plates are provided in the main shell. The two sets of protective plates are located on both sides of the baffle. The main shell, the protective plate and the baffle cooperate to form a relatively closed first protective cavity and a second protective cavity. The detector body is installed in the first protective cavity, and the air intake assembly is located in the second protective cavity. The protective cavity can provide an independent and stable working environment for both, effectively blocking various interference factors in the external environment, so that the detector body is always in a dry environment, which can ensure its normal operation and ensure the accuracy and stability of the test results. At the same time, the storage tank of the collection pipe in the air intake assembly, with a dustproof net and an air pump, can not only efficiently collect and store the test gas, but also ensure the purity of the gas and avoid the interference of impurities on the test results. An injection port is provided on one side of the main shell. The storage tank and the injection port are connected to the first connector through a connecting pipe. The way in which the decomposition product enters the detector body can be selected according to the use requirements. The decomposition product can be collected through the air intake assembly and then enters the detector body through the air intake assembly; the decomposition product can also be injected through the injection port, which is more suitable for real-time detection and analysis of a small amount of specific decomposition products. These two optional methods can meet different detection scenarios and needs, greatly improving the applicability and practicality of the detection device.

[0069] 2. A temperature control component is provided in the first protective cavity, which can control the temperature of the detector body when in use. No matter how the external temperature changes, the detector body can be kept at a suitable and stable working temperature, thereby improving the detection accuracy. The insulation layer in the temperature control component is in contact with the detector body, and a heating wire is provided in the insulation layer. When the external temperature is too low, the heating wire can work to increase the temperature around the detector body and maintain it in the ideal working range. At the same time, a semiconductor refrigeration plate is provided in the through groove on the main shell, and is indirectly in contact with the detector body through the heat conducting plate, which can effectively conduct heat; when the ambient temperature is too high, the semiconductor refrigeration plate starts, and the heat is quickly conducted out through the heat conducting plate, thereby creating a low temperature and stable working condition for the detector body, ensuring the stable performance of its performance and the accuracy of the detection results.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. Photoacoustic spectrum detection device for SF6 gas decomposition products, including: The main housing (11) and the detector body (21) are characterized in that: A baffle (12) is arranged in the main housing (11), and two sets of protective plates (22) are clamped in the main housing (11) and located on both sides above the baffle (12), forming a first protective cavity (31) and a second protective cavity (32) with the main housing (11), wherein the protective cavity is used to block interference factors in the external environment and place the detector body (21) in a dry environment; The detector body (21) is a photoacoustic spectrum detector, which is installed in the first protective cavity (31). The detector body (21) is provided with an air inlet pipe (23) and an air outlet pipe (24). The second protective cavity (32) is provided with an air inlet assembly, the air inlet pipe (23) is connected to the air inlet assembly, and the air inlet assembly is used to collect and store the detection gas; A temperature control component is provided in the first protection cavity (31), the temperature control component is located below the detector body (21), and the temperature control component is used to control the working temperature of the detector body (21).

2. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: The air intake assembly comprises: a collecting pipe (41) and a storage tank (42); a mounting frame (13) is provided on the main housing (11), and the collecting pipe (41) is clamped on the mounting frame (13); Both ends of the collecting pipe (41) are provided with slots (43), and two groups of dustproof nets (44) are respectively mounted in the two groups of slots (43) and are detachably connected to the collecting pipe (41); a mounting seat (14) is provided in the main shell (11), and the storage tank (42) is mounted on the mounting seat (14).

3. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 2, characterized in that: The air intake assembly further comprises a first air pump (45), the first air pump (45) being connected to the collecting pipe (41) and the storage tank (42) respectively through connecting pipes, the collecting pipe (41) and the storage tank (42) being connected and interlinked; the baffle (12) is provided with a first connecting member (46) and a second connecting member (47), the first connecting member (46) being connected to the air intake pipe (23) and the storage tank (42) respectively through connecting pipes.

4. The SF6 gas decomposition product photoacoustic spectrometer detection device according to claim 1 or 3, characterized in that: A gas injection port (15) is provided on one side of the main shell (11), and the gas injection port (15) is connected to a first connecting piece (46) via a connecting pipe. A solenoid valve is provided between the first connecting piece (46), the storage tank (42) and the gas injection port (15), and the solenoid valve is sleeved on the connecting pipe. An exhaust port (16) is provided on the other side of the main shell (11), and the second connecting piece (47) is respectively connected to the exhaust port (16) and the exhaust pipe (24) via a connecting pipe.

5. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: A second air pump (48) is arranged in the second protection cavity (32); the second air pump (48) is connected to the storage tank (42) and the exhaust port (16) respectively through connecting pipes, and the exhaust port (16) is connected to the second connecting member (47) through the connecting pipe.

6. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: The temperature control component comprises a heat-insulating layer (51), a fixing groove (17) is provided in the main shell (11), and the heat-insulating layer (51) is clamped in the fixing groove (17) and contacts the detector body (21); A heating wire is arranged in the thermal insulation layer (51), an installation box (18) is arranged in the main shell (11), a controller (25) and a temperature control module (26) are arranged in the installation box (18), and the temperature control module (26) is electrically connected to the heating wire; a battery is also arranged in the first protective cavity (31), and the battery can be connected to an external power source.

7. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: A mounting frame (27) is provided on one group of the protective plates (22), an operating panel (28) is mounted in the mounting frame (27), the operating panel (28) is electrically connected to the controller (25) and the detector body (21), respectively, and a temperature sensor (29) is also provided in the first protective cavity (31), the temperature sensor (29) is mounted on one side of the baffle (12).

8. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: The temperature control component also includes a semiconductor refrigeration plate (52). A through slot (53) is provided on the main shell (11). The semiconductor refrigeration plate (52) is clamped in the through slot (53). A heat conducting plate (54) is provided on the top of the through slot (53). Both sides of the heat conducting plate (54) are in contact with the detector body (21) and the semiconductor refrigeration plate (52) respectively. A mounting plate (55) is provided at the bottom of the through slot (53). A fan (56) is provided below the main shell (11). The fan (56) is mounted on the mounting plate (55). A heat dissipation groove (57) is also provided on one side of the main shell (11).

9. The SF6 gas decomposition product photoacoustic spectrum detection device according to claim 1, characterized in that: A main body cover plate (19) is arranged above the main body shell (11), and the main body cover plate (19) is rotatably connected to the main body shell (11). A placement box (33) is arranged between the main body cover plate (19) and the main body shell (11), and the placement box (33) is clamped in the main body shell (11).

10. A method for detecting SF6 gas decomposition products, based on the SF6 gas decomposition product photoacoustic spectroscopic detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Preparing the device for operation, connect the device to an external power source for charging, and check whether the device is operating normally; Step 2: Select the gas injection method. Select the method for the decomposition products to enter the detector body (21) according to actual needs. If it is necessary to collect and then detect through the air intake component, the first air pump (45) can be started to make the collection tube (41) start to collect gas; if there are decomposition products that need to be detected and analyzed immediately, they can be directly injected through the gas injection port (15); Step 3: Detection is started, and the gas to be detected is guided to the detector body (21). If the gas is injected through the gas inlet assembly, the gas enters the detector body (21) from the storage tank (42) through the connecting pipe; if the gas is injected through the gas injection port (15), the gas directly enters the detector body (21); at the same time, the temperature control assembly located in the first protective cavity (31) starts to work, and the temperature sensor (29) monitors the temperature in real time; Step 4: reading the measurement data. The detector body (21) detects and analyzes the gas. After the detection is completed, the data is transmitted to the controller (25). The controller (25) processes the signal and transmits the detection result to the operation panel (28). The user can read and record the detection data on the operation panel (28); Step 5: After the test is completed, all components are shut down through the operation panel (28) and the device is stored.

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