Method, device and system for monitoring gas component polymerization curve of closed switch equipment

Abstract

The invention provides a method, a device and a system for monitoring a gas component polymerization curve of closed switch equipment, and belongs to the technical field of monitoring. Comprising the steps that an SF6 gas decomposition product sample is collected and sent into a monitoring device, and the sample is mixed gas collected after a fault event is simulated in a fault generation device filled with SF6 gas and a conventional inner insulating medium; analyzing decomposition components of each sample of a single fault event, determining concentration values of SO2, H2S and CO, and obtaining a decomposition component data time sequence; respectively carrying out curve polymerization to obtain an SO2 polymerization curve, an H2S polymerization curve and a CO polymerization curve; establishing a corresponding relation between the change condition of the slope k of the curve along with time and fault features, and storing the corresponding relation as a diagnosis reference model; and collecting a gas sample of the detected equipment, sending the gas sample into a monitoring device, analyzing decomposed components, performing curve polymerization, and comparing the obtained polymerization curve with each stored diagnosis reference model to obtain the fault type of the detected equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of gas insulation equipment monitoring, and in particular to a method, device and system for monitoring gas component polymerization curve of enclosed switchgear. Background Art

[0002] SF6 gas has good chemical stability, excellent insulation and isolation performance, and is suitable as an insulating gas for filling enclosed switchgear GIS. Due to some uncertainties in the design, material, process and maintenance of the equipment, there may be some defects inside the equipment. Under the action of heat and electricity, the defects continue to expand, the insulation continues to decline, and until a failure occurs, affecting the safety of power production. In the case of partial discharge, overheating, poor contact, etc. inside the SF6 gas-insulated equipment, the SF6 in the gas chamber will decompose and combine to produce various types of gases. The type and generation rate of the decomposition products are often closely related to the type of internal fault. Since the diffusion coefficients of different gases are significantly different, the SF6 component detection results can often characterize the status and fault conditions of the enclosed switchgear.

[0003] Real-time detection of SF6 components can be carried out by chemical analysis. Accurate chemical detection requires sampling on site and sending to the laboratory for inspection. Sampling and analysis usually still take some time after the fault is confirmed. The time and space difference between the time when the fault occurs and the time when the sample is inspected causes the components in the SF6 gas to change, affecting the accuracy of the test results. Due to the long analysis time, the real-time nature of the data is also greatly reduced. At the same time, the inspection process is also very inconvenient. Summary of the invention

[0004] In view of this, the present invention provides a method, device and system for monitoring the gas component polymerization curve of enclosed switchgear, which supports on-site inspection and rapid detection of the content of SF6 gas decomposition products in the equipment, and can further rapidly diagnose latent faults of the equipment according to the diagnostic model, thereby effectively improving the accuracy and efficiency of latent fault diagnosis of SF6 electrical equipment.

[0005] The technical solution adopted by the embodiment of the present invention to solve the technical problem is: A closed switchgear gas component polymerization curve monitoring device comprises a top cover (2), an equipment box (1), and a base (3) which are connected in sequence; the equipment box (1) comprises a U-shaped sheet metal frame (11), an embedded box (12), an auxiliary heat sink (15), a monitoring module (124), a detection module (125), and a gas path module (126); the U-shaped sheet metal frame (11), the auxiliary heat sink (15), and the embedded box (12) are arranged in sequence from the outside to the inside and are all fixedly installed on the base (3); the gas path module (126), the detection module (125), and the monitoring module (124) are connected in sequence and are all installed in the embedded box (12); One end of the gas path module (126) is connected to the charging and discharging port of the device under test through an adapter, and the other end is connected to the detection module, so as to collect gas samples in the device under test and pump them into the detection module (125); A gas sensor is provided in the detection module (125) for detecting decomposition component data of the gas sample; and the detection data is sent to the monitoring module (124); the decomposition component data includes SO2, H2S, and CO concentration values; The monitoring module (124) is used to record the time series of decomposition component data of the detected equipment, and further use the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to perform curve aggregation to obtain a SO2 aggregation curve, a H2S aggregation curve, and a CO aggregation curve; compare the obtained aggregation curve with each stored diagnostic reference model to obtain the fault type of the detected equipment; The monitoring module (124), the detection module (125), and the gas path module (126) generate a large amount of heat during operation. The auxiliary heat dissipation device (15) is used to dissipate heat for the monitoring module (124), the detection module (125), and the gas path module (126), thereby preventing the gas sensor from having a reduced sensitivity due to heat and improving the accuracy of data collected by the sensor.

[0006] 2. The gas component polymerization curve monitoring device for enclosed switchgear according to claim 1, wherein the monitoring module (124) is used for: Analyze the decomposition components of each sample of a single fault event, determine the concentration values ​​of SO2, H2S, and CO, and obtain a time series of decomposition component data; the sample is a mixed gas collected after simulating a fault event in a fault generating device filled with SF6 gas and a conventional internal insulating medium based on a preset fault feature, and the fault event includes different types of discharge faults at different voltage levels and overheating faults at different temperatures; periodically collect samples of a single fault event, wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Further, with the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis, curve polymerization is performed to obtain the SO2 polymerization curve, the H2S polymerization curve, and the CO polymerization curve; Obtain the decomposed component data time series; establish the corresponding relationship between the change of the slope k of the curve over time and the fault characteristics, and store it as a diagnostic reference model.

[0007] Preferably, the U-shaped sheet metal frame (11) comprises a left limit plate, a rear heat dissipation hole plate (16), and a right limit plate which are connected in sequence, and the rear heat dissipation hole plate (16) has a heat dissipation hole structure; The auxiliary heat dissipation device (15) comprises a left inner frame plate fixedly mounted on the inner surface of the left limit plate, a right inner frame plate mounted on the inner surface of the right limit plate, a heat exhaust component support frame, and a heat exhaust component (154); The heat dissipation component (154) comprises a fixed plate (1541), a rotating shaft (1543) fixedly connected to the upper left and right sides of the fixed plate (1541), a connecting block (1544) rotatably connected to the lower left and right sides of the fixed plate (1541), and an adjusting hole rod (1545) connected to the end of the connecting block (1544); the adjusting hole rod (1545) is provided with a group of limit jacks, and a guide slider (1549) is fixedly installed on the adjusting hole rod (1545); N2 air guide grooves (1546) are provided on the fixed plate (1541); a dust cover (1542) is installed at the opening of one side of the air guide groove (1546) facing the rear heat dissipation hole plate (16), and a fixing frame (1547) is installed at the opening of the side facing the embedded box (12), and an electric control fan (1548) is installed on each fixing frame (1547); The heat removal component support frame is fixedly installed between the left inner frame plate and the right inner frame plate; the heat removal component support frame is a hollow structure, and N1 heat removal component installation grooves are provided in the middle from top to bottom for installing N1 heat removal components (154); a pair of rotating shaft holes are provided on the upper part of the inner surface of the left and right sides of the heat removal component installation groove, and the two rotating shafts (1543) of the heat removal component (154) are located on the same axis, and the ends are respectively rotatably connected to the rotating shaft holes of the heat removal component installation groove; N1 through grooves (153) are provided on the left and right hollow cylinders (155) of the heat removal component support frame, and the through grooves (153) Located on the left and right sides of the heat exhaust component installation groove; the through groove (153) is opened along the front-to-back direction; a latch hole is opened on the upper inner wall of the through groove (153); a guide slide groove is opened on each of the left and right inner walls of the through groove (153), and the shape of the guide slide groove is set according to the movement trajectory of the guide slider (1549), and the two adjustment hole rods (1545) are respectively placed in the through groove (153) on the left and right sides of the heat exhaust component installation groove, and the two ends of the guide slider (1549) are respectively slidably connected to the two guide slide grooves of the through groove (153); a limit pull rod (152) is installed in each of the two hollow cylinders (155); The limiting pull rod (152) comprises a pull ring (1521), a bending rod (1522) in a continuous right-angle shape, and a latch assembly (1523); the pull ring (1521) is connected to the top of the bending rod (1522) and is located outside the hollow cylinder (155); the bending rod (1522) comprises a vertical structure and a horizontal structure that are repeatedly connected in a circular shape, the vertical structure is located on the side of the through groove (153), and the horizontal structure is located below the through groove (153), and the through groove (153) is used to limit and prevent the limiting pull rod (152) from being dislocated from the hollow cylinder (155); the latch fixing part in the latch assembly (1523) is fixedly installed on the vertical structure of the bending rod (1522), and the latch fixing part fixes the direction of the latch to be vertically downward and facing the latch through hole, and the latch (1523) is used to insert into the limiting plug hole of the adjustment hole rod (1545) to play a limiting role; The limit rod (152) is lifted upwards to disengage each latch (1523) from the adjustment hole rod (1545); after each fixed plate (1541) is adjusted to a desired angle, the limit rod (152) is lowered to engage each latch (1523) with the adjustment hole rod (1545) again, thereby achieving the aligned output of the fan (1548); each fan (1548) is connected to a sub-controller and is individually controlled by the sub-controller; the sub-controller is mounted on the fixed plate (1541); each sub-controller is connected to a monitoring module (124) and is centrally controlled by the monitoring module (124).

[0008] Preferably, the number N1 of the heat dissipation components (154) is ≥5, one side corresponds to the heat dissipation holes opened on the box body (121), and the other side corresponds to the rear heat dissipation hole plate (16), forming a pumping external discharge to achieve the effect of quickly dissipating heat; the number N2 of the electronically controlled fans (1548) on the fixed plate (1541) is ≥3.

[0009] Preferably, N3 slide rails (13) are horizontally installed on the inner surface of the left support plate and the inner surface of the right support plate of the auxiliary heat sink (15), and a sliding member (14) is slidably connected to the slide rail (13); The built-in box (12) is composed of a box body (121) and a sinking carrier (123) for placing each module; the front side of the built-in box (12) is open, and the rear side plate has ventilation holes; wherein: N3-1 harness reserved partitions (127) are installed from top to bottom in the box body (121) to form N3 placement slots for placing the sinking rack (123), and the left and right inner walls of each placement slot are provided with side slide slots (1211); a slideway (122) is installed on the inner walls of the two placement slots and at positions corresponding to the side slide slots (1211); the anti-slip slider (1212) sequentially penetrates and is slidably connected to the side slide slots (1211), the slideway (122), and the auxiliary transfer rail (1232); The sinking carrier (123) comprises a U-shaped groove frame (1231) having an outer platform structure, and the auxiliary shift rails (1232) are horizontally installed on the left and right sides of the U-shaped groove frame (1231) and are located below the outer platform structure; the rear sides of the two outer walls of the U-shaped groove frame (1231) are fixedly connected to connecting rods (1234), and the connecting rods (1234) pass through the slideway (122) and are fixedly connected to the surface of the sliding member (14); the U-shaped groove frame (1231) is provided with a wire clamping groove (1233); From top to bottom, a monitoring module (124) is installed in the first sinking carrier, a detection module (125) is installed in the second sinking carrier, and a gas path module (127) is installed in the third sinking carrier; the gas path module (127) and the detection module (125) are connected by a wire harness and a gas path, and the detection module (125) and the monitoring module (124) are connected by a wire harness; A groove (1271) is provided on the reserved partition (127) for wiring harnesses, a group of threading holes (1272) are provided on the surface of the groove (1271), a group of wire clamp frames (1273) are correspondingly provided next to each threading hole (1272), and a group of reset tension springs (1274) are fixedly installed on the side wall of the groove (1271); a group of wire clamp frames (1273) are composed of a fixed wire clamp frame and a movable wire clamp frame; the wire harness or gas pipeline is wound in the reserved partition (127) for wiring harnesses by sequentially passing through the wire clamp frames from the bottom. The wire threading hole (1272), the anti-stripping clamp frame, the movable end of the reset tension spring (1274), and the movable wire clamp frame are formed into a U shape, and then connected to the device through the wire clamp slot (1233) or enter the upper wire harness reserved partition (127), wherein the anti-stripping clamp frame is used to fix the wire harness or the air pipeline to keep it from being dislocated, and the movable wire clamp frame is used to fix the wire harness or the air pipeline but allow the wire harness or the air pipeline to be dislocated under the action of external force; the air pipeline used for air path connection is inserted in and out of the wire threading hole (1272); When the sinking carrier (123) is pushed or pulled inwards or outwards by external force, the connecting rod (1234) drives the sliding member (14) to move in the horizontal direction under the support of the auxiliary moving rail (1232), the slideway (122) and the anti-slip slider (1212), so that the sinking carrier (123) is displaced and extended out of the placement groove or reset; when the sinking carrier (123) extends out of the placement groove, the wire harness or the air path pipeline falls off from the movable wire clamp frame, and the reset tension spring (1274) extends; when the sinking carrier (123) is reset into the placement groove, the reset tension spring (1274) is reset, and the wire harness or the air path pipeline is clamped into the movable wire clamp frame by external force, so that the monitoring module (124), the detection module (125) and the air path module (126) can be observed, inspected and maintained.

[0010] Preferably, the adapter has two interconnected quick interfaces, one of which is connected to the gas inlet of the gas path module (126), and the other is connected to the charging and exhaust outlet of the device under test through an adapter, and a filter is installed in the adapter, and the filter is used to filter foreign particles; The gas circuit module (126) has an air pump and an electric control switch; the electric control switch is connected to the detection module (125), is controlled by the detection module (125), is located at the connection of the detection module (125), and is used to control the on-off of the gas circuit between the gas circuit module (126) and the detection module (125); the air pump is used to pump the gas in the gas circuit into the detection module (125).

[0011] Preferably, a roller with a brake is installed on the lower surface of the base (3), and the roller type is a one-way wheel or a universal wheel; and the electric control switch adopts a solenoid valve.

[0012] The present invention provides a method for monitoring the polymerization curve of gas components in a closed switchgear, the implementation subject is the aforementioned closed switchgear gas decomposition product polymerization curve monitoring device, and the steps include: Step S1, the gas path module collects the gas in the device under test and sends the collected samples to the detection module; wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Step S2, the detection module analyzes the decomposition components of each sample, determines the concentration values ​​of SO2, H2S, and CO, and obtains the decomposition component data time series sequence which is input into the monitoring module; Step S3, the monitoring module uses the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to perform curve polymerization to obtain a SO2 polymerization curve, a H2S polymerization curve, and a CO polymerization curve; Step S4: the monitoring module compares the obtained aggregation curve with each of the stored diagnostic reference models to obtain the fault type of the device under inspection.

[0013] Preferably, before step S1, the method further includes: Step S5, collecting samples of SF6 gas decomposition products; the samples are mixed gases collected after simulating a fault event in a fault generating device filled with SF6 gas and a conventional internal insulating medium based on preset fault characteristics, wherein the fault event includes different types of discharge faults at different voltage levels and overheating faults at different temperatures; periodically collecting samples of single fault events, wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Step S6, analyzing the decomposition components of each sample of a single fault event, determining the concentration values ​​of SO2, H2S, and CO, and obtaining a decomposition component data time series sequence; Step S7, taking the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis, respectively, curve polymerization is performed to obtain a SO2 polymerization curve, a H2S polymerization curve, and a CO polymerization curve; Step S8, establishing a corresponding relationship between the change of the slope k of the curve over time and the fault characteristics, and storing it as a diagnostic reference model.

[0014] The present invention provides a closed switchgear gas component polymerization curve monitoring system, comprising the aforementioned closed switchgear gas component polymerization curve monitoring device and a device to be inspected, wherein a gas circuit module (126) in the closed switchgear gas component polymerization curve monitoring device is connected to the charging and exhausting ports of the device to be inspected via an adapter, and the closed switchgear gas component polymerization curve monitoring device periodically collects mixed gas in the device to be inspected for component analysis, and analyzes the fault type of the device to be inspected in real time.

[0015] It can be seen from the above technical scheme that the closed switchgear gas component polymerization curve monitoring method, device and system provided by the embodiment of the present invention first collect SF6 gas decomposition product samples and send them to the monitoring device, the sample is a mixed gas collected after simulating a fault event in a fault occurrence device filled with SF6 gas and conventional internal insulating medium; analyze the decomposition components of each sample of a single fault event, determine the concentration values ​​of SO2, H2S, and CO, and obtain the decomposition component data time series sequence; perform curve polymerization respectively to obtain SO2 polymerization curve, H2S polymerization curve, and CO polymerization curve; establish a corresponding relationship between the slope k of the curve and the fault characteristics over time, and store it as a diagnostic reference model; collect gas samples of the inspected equipment and send them to the monitoring device, analyze the decomposition components and perform curve polymerization, and compare the obtained polymerization curve with each stored diagnostic reference model to obtain the fault type of the inspected equipment. The device of the present invention supports on-site inspection, quickly detects the content of SF6 gas decomposition product components of the equipment, and can further quickly diagnose the latent fault of the equipment according to the diagnostic model, which can effectively improve the accuracy and efficiency of SF6 electrical equipment fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0017] Figure 2 It is a schematic diagram of the top view of the structure of the equipment box in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0018] Figure 3 It is a front view structural schematic diagram of the embedded box in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0019] Figure 4It is a schematic diagram of the top view of the structure of the sinking carrier in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0020] Figure 5 The diagram is a top view of the structure of a reserved partition for a wiring harness in a gas component polymerization curve monitoring device of the present invention.

[0021] Figure 6 It is a schematic diagram of the side structure of the box in the closed switchgear gas component polymerization curve monitoring device of the present invention.

[0022] Figure 7 It is a front view structural schematic diagram of the auxiliary heat dissipation device in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the limit pull rod in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the heat removal component in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0025] Fig.10 It is a schematic diagram of the rear structural view of the fixed plate in the gas component polymerization curve monitoring device of the enclosed switchgear of the present invention.

[0026] Fig.11 It is a schematic diagram of the detection principle structure of the closed switchgear gas component polymerization curve monitoring method of the present invention.

[0027] Fig.12 This is an example of a graph of the aggregation of decomposition products.

[0028] In the figure: equipment box-1, top cover-2, base-3, U-shaped sheet metal frame-11, embedded box-12, slide rail-13, sliding member-14, auxiliary heat dissipation device-15, rear heat dissipation hole plate-16, box body-121, slide-122, sinking rack-123, monitoring module-124, detection module-125, air path module-126, wire harness reserved partition-127, side slide groove-1211, anti-drop slider-1212, U-shaped groove frame-1231, auxiliary sliding rail-1232, wire clamp groove-1233, connecting rod-1234, groove -1271, threading hole -1272, wire clamp frame -1273, reset spring -1274, left inner frame plate -151, limit rod -152, through slot -153, heat dissipation component -154, hollow cylinder 155, pull ring -1521, bending rod -1522, latch -1523, fixing plate -1541, dust cover -1542, rotating shaft -1543, connecting block -1544, adjusting hole rod -1545, air guide slot -1546, fixing frame -1547, electric control fan -1548, guide slider -1549. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not used to limit the present invention.

[0030] The present invention provides a gas component polymerization curve monitoring device for enclosed switchgear, which can perform on-site monitoring and can monitor the equipment status by using the polymerization curve of decomposition products of high-voltage SF6 circuit breakers; at the same time, when the existing SF6 circuit breaker decomposition product polymerization curve monitoring equipment needs to be inspected and maintained during use, due to the small space in the embedded box, it is not possible to better observe and inspect the internal modules and systems, thereby causing inconvenience in inspection and maintenance; in addition, high temperature will affect the sensitivity of the gas sensor, and the device of the present invention provides a specific solution in terms of ventilation and heat dissipation.

[0031] refer to Figure 1-10 As shown, the gas component polymerization curve monitoring device for enclosed switchgear provided by the present invention comprises a top cover 2, an equipment box 1, and a base 3 connected in sequence, wherein the equipment box 1 is composed of a U-shaped sheet metal frame 11, an embedded box 12, an auxiliary heat sink 15, a monitoring module 124, a detection module 125, and a gas path module 126. Figure 1As shown, the U-shaped sheet metal frame 11, the auxiliary heat sink 15, and the embedded box 12 are arranged from the outside to the inside and are all fixedly installed on the base 3. The gas path module 126, the detection module 125, and the monitoring module 124 are connected in sequence and are all installed in the embedded box 12; the lower surface of the base 3 is equipped with a brake roller, and the roller type can be a one-way wheel or a universal wheel to achieve the corresponding auxiliary displacement to the specified area or position. The device provides a power module for powering each module, which will not be described in detail here.

[0032] One end of the gas circuit module 126 is connected to the charging and discharging port of the device under test through an adapter, and the other end is connected to the detection module, so as to collect gas samples in the device under test and pump them into the detection module 125; The detection module 125 provides a gas sensor for detecting the decomposition component data of the gas sample; and sends the detection data to the monitoring module 124; the decomposition component data includes the concentration values ​​of SO2, H2S, and CO; The monitoring module 124 is used to record the time series of the decomposed component data of the inspected equipment, and further perform curve aggregation with the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to obtain the SO2 aggregation curve, the H2S aggregation curve, and the CO aggregation curve; compare the obtained aggregation curve with each stored diagnostic reference model to obtain the fault type of the inspected equipment; The monitoring module 124, the detection module 125, and the gas path module 126 generate a large amount of heat during operation. The auxiliary heat dissipation device 15 is used to dissipate heat for the monitoring module 124, the detection module 125, and the gas path module 126 to avoid a decrease in sensitivity of the gas sensor due to heat and to improve the accuracy of the sensor data collection.

[0033] The monitoring module 124 is also used to: The decomposed components of each sample of a single fault event are analyzed to determine the concentration values ​​of SO2, H2S, and CO, and obtain a time series sequence of decomposed component data; the sample is a mixed gas collected after simulating a fault event in a fault generating device filled with SF6 gas and conventional internal insulating medium based on a preset fault feature, and the fault event includes different types of discharge faults at different voltage levels and overheating faults at different temperatures; samples of a single fault event are collected periodically, wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; further, with the number of cycles n as the horizontal axis and the concentration values ​​of the three components as the vertical axis, curve aggregation is performed respectively to obtain a SO2 aggregation curve, a H2S aggregation curve, and a CO aggregation curve; a time series sequence of decomposed component data is obtained; a corresponding relationship between the change of the slope k of the curve over time and the fault feature is established, and stored as a diagnostic reference model.

[0034] In terms of structure, refer to Figure 2As shown, the U-shaped sheet metal frame 11 includes a left limit plate, a rear heat dissipation hole plate 16, and a right limit plate connected in sequence, and the rear heat dissipation hole plate 16 has a heat dissipation hole structure; the rear heat dissipation hole plate of an integrated structure arranged on the rear wall of the sheet metal frame mainly serves to dissipate the electronic equipment in the embedded box accordingly, thereby ensuring the normal operation of the electronic equipment, and at the same time, the slide rail fixed on the inner wall of the auxiliary heat dissipation device serves to provide displacement of the structure in the embedded box.

[0035] The auxiliary heat dissipation device 15 includes a left inner frame plate fixedly mounted on the inner surface of the left limit plate, a right inner frame plate mounted on the inner surface of the right limit plate, a heat exhaust component support frame, and a heat exhaust component 154; The heat dissipation component 154 includes a fixed plate 1541, a rotating shaft 1543 fixedly connected to the upper left and right sides of the fixed plate 1541, a connecting block 1544 rotatably connected to the lower left and right sides of the fixed plate 1541, and an adjusting hole rod 1545 connected to the end of the connecting block 1544; the adjusting hole rod 1545 is provided with a group of limit jacks, and a guide slider 1549 is fixedly installed on the adjusting hole rod 1545; N2 air guide grooves 1546 are provided on the fixed plate 1541; a dust cover 1542 is installed at the opening of the air guide groove 1546 facing the rear heat dissipation hole plate 16, and a fixing frame 1547 is installed at the opening of the side facing the embedded box 12, and an electric control fan 1548 is installed on each fixing frame 1547; the electric control fan is mainly installed on the fixing frame and faces the box body, so that when the heat dissipation holes on the box body are used to discharge heat, heat extraction is completed, thereby ensuring the normal operation of the structure inside the box.

[0036] The heat removal component support frame is fixedly installed between the left inner frame plate and the right inner frame plate; the heat removal component support frame is a hollow structure, and N1 heat removal component installation grooves are provided in the middle from top to bottom for installing N1 heat removal components 154; a pair of rotating shaft holes are provided on the upper part of the inner surface of the left and right sides of the heat removal component installation groove, and the two rotating shafts 1543 of the heat removal component 154 are located on the same axis, and the ends are respectively rotatably connected to the rotating shaft holes of the heat removal component installation groove; N1 through grooves 153 are provided on the left and right hollow cylinders 155 of the heat removal component support frame, and the through grooves 153 are located The heat dissipation component installation slot is on the left and right sides; the through slot 153 is opened along the front-back direction; the upper inner wall of the through slot 153 is opened with a latch hole; a guide slot is opened on each of the left and right inner walls of the through slot 153, and the shape of the guide slot is set according to the movement trajectory of the guide slider 1549, and the two adjustment hole rods 1545 are respectively placed in the through slot 153 on the left and right sides of the heat dissipation component installation slot, and the two ends of the guide slider 1549 are respectively slidably connected to the two guide slots of the through slot 153; a limit pull rod 152 is installed in each of the two hollow cylinders 155; The limiting pull rod 152 comprises a pull ring 1521, a bending rod 1522 in a continuous right-angle return shape, and a latch assembly 1523; the pull ring 1521 is connected to the top of the bending rod 1522 and is located outside the hollow cylinder 155; the bending rod 1522 comprises a vertical structure and a horizontal structure that are repeatedly connected in a return shape in sequence, the vertical structure is located on the side of the through groove 153, and the horizontal structure is located below the through groove 153, and the through groove 153 is used to limit and prevent the limiting pull rod 152 from being dislocated from the hollow cylinder 155, so as to achieve the function of auxiliary fixation and adjustment; the latch fixing part in the latch assembly 1523 is fixedly installed on the vertical structure of the bending rod 1522, and the latch fixing part fixes the direction of the latch to be vertically downward and facing the latch through hole, and the latch 1523 is used to be inserted into the limiting plug hole of the adjustment hole rod 1545 to play a limiting role; The fixed plate is connected to the through slot through the adjusting hole rods on the connecting blocks at both ends, and the adjusting hole rod is engaged with the latch, which is moved up and down by the bending rod and the pull ring. The electric control fan is directly opposite to the heat dissipation slot at the rear of the box, and the front of the dust cover is directly opposite to the rear heat dissipation hole plate. The two ends of the fixed plate are connected to the side wall of the inner frame plate through the rotating shaft, and can be hinged and swung. The fixed plate can change the air suction angle of the electric control fan through the adjusting hole rod. The fixed plate can form an articulated swing through the rotating shafts at both ends, and the limit pull rod 152 is lifted upward to make each latch 1523 disengage from the adjusting hole rod 1545. After each fixed plate 1541 is adjusted to the desired angle, the inclination angle of the fixed plate is changed, and the limit pull rod 152 is dropped to make each latch 1523 engage with the adjusting hole rod 1545 again, so as to achieve the alignment output of the fan 1548 and better heat dissipation of the box. Each fan 1548 is connected to a sub-controller and is controlled individually by the sub-controller, and the sub-controller is installed on the fixed plate 1541; each of the sub-controllers is connected to the monitoring module 124 and is centrally controlled by the monitoring module 124, that is, the heat exhaust component 154 can be turned on and off individually by manual control, and can also be directly automatically controlled by the monitoring module 124. As an implementation method, a temperature sensor can be installed in the embedded box 12 (or in each placement slot), and the temperature sensor is connected to the monitoring module 124. The monitoring module 124 controls the number of fans to work according to the interval where the temperature sensor data is located.

[0037] The number N1 of the heat dissipation components 154 is ≥5, one side corresponds to the heat dissipation holes opened on the box body 121, and the other side corresponds to the rear heat dissipation hole plate 16, forming a pumping external discharge to achieve the effect of quickly dissipating heat; the number N2 of the electronically controlled fans 1548 on the fixed plate 1541 is ≥3.

[0038] N3 slide rails 13 are horizontally installed on the inner surface of the left support plate and the inner surface of the right support plate of the auxiliary heat sink 15, and a sliding member 14 is slidably connected to the slide rail 13; The built-in box 12 is composed of a box body 121 and a sinking carrier 123 for placing each module; the front side of the built-in box 12 is open, and the rear side plate has ventilation holes; wherein: N3-1 harness reserved partitions 127 are installed from top to bottom in the box body 121 to form N3 placement slots for placing the sinking rack 123. The left and right inner walls of each placement slot are provided with side slide slots 1211, and the side slide slots 1211 are slidably connected with the anti-slip slider 1212; a slideway 122 is installed on the inner walls of the two placement slots and at the positions corresponding to the side slide slots 1211, and the anti-slip slider 1212 sequentially penetrates and is slidably connected to the side slide slots 1211, the slideway 122, and the auxiliary shift rail 1232; The sinking carrier 123 includes a U-shaped groove frame 1231 with an outer platform structure, and the auxiliary moving rails 1232 are horizontally installed on the left and right sides of the U-shaped groove frame 1231 and are located below the outer platform structure; the rear sides of the two outer walls of the U-shaped groove frame 1231 are fixedly connected to the connecting rods 1234, and the connecting rods 1234 pass through the slideway 122 and are fixedly connected to the surface of the sliding member 14; the U-shaped groove frame 1231 is provided with a wire clamping groove 1233; From top to bottom, the monitoring module 124 is installed in the first sinking carrier, the detection module 125 is installed in the second sinking carrier, and the gas path module 127 is installed in the third sinking carrier; the gas path module 127 and the detection module 125 are connected by a wire harness and a gas path, and the detection module 125 and the monitoring module 124 are connected by a wire harness; A groove 1271 is provided on the wire harness reserved partition 127, and a group of threading holes 1272 are provided on the surface of the groove 1271. A group of wire clamp racks 1273 are correspondingly arranged next to each threading hole 1272, and a plurality of reset tension springs 1274 are fixedly installed on the side wall of the groove 1271; the wire clamp rack is mainly used for the nesting and clamping of wire harnesses or pipelines. When the wire harnesses or pipelines are nested and penetrated during use, the clamp rack on the side completes the clamping of the wire harnesses or pipelines, so that the wire harnesses form a "U" shape to complete the reservation of the wire harnesses or pipelines. A set of wire clamp racks 1273 is composed of a fixed wire clamp rack and a movable wire clamp rack; the wire harness or gas pipeline is wound in the wire harness reserved partition 127 in the following manner: the wire harness or gas pipeline is passed through the threading hole 1272, the anti-slip wire clamp rack, the movable end of the reset tension spring 1274, and the movable wire clamp rack from the bottom in sequence to form a U shape, and then connected to the device through the wire clamp slot 1233 or enters the upper wire harness reserved partition 127, wherein the anti-slip wire clamp rack is used to fix the wire harness or gas pipeline to keep it from being dislocated, and is used for the penetration of the wire harness; the movable wire clamp rack is used to fix the wire harness or gas pipeline but allows the wire harness or gas pipeline to be dislocated under the action of external force, and is used for the clamping of the wire harness; the gas pipeline for gas connection passes through the threading hole 1272; When the sinking carrier 123 is pushed and pulled inward and outward by external force, the connecting rod 1234 drives the sliding member 14 to move in the horizontal direction under the support of the auxiliary moving rail 1232, the slide 122, and the anti-slip slider 1212, so that the sinking carrier 123 is displaced and extended out of the placement slot or reset; when the sinking carrier 123 extends out of the placement slot, the wiring harness or the air pipeline falls off the movable wire clamp frame, and the reset tension spring 1274 extends; when the sinking carrier 123 is reset to the placement slot, the reset tension spring 1274 is reset, and the wiring harness or the air pipeline enters and engages with the movable wire clamp frame through external force; the frame body is mainly matched with the external sliding member through the auxiliary moving rails and the connecting rod on both sides, so that the frame body is displaced and extended out of the box body, so that the system, modules, etc. installed above the frame body can be correspondingly expanded out of the narrow box body to complete maintenance and inspection.

[0039] The adapter has two interconnected quick interfaces, one of which is connected to the gas inlet of the gas path module 126, and the other is connected to the charging and exhaust outlet of the device under test through an adapter. A filter is installed in the adapter, and the filter is used to filter foreign particles; The gas circuit module 126 has an air pump and an electric control switch; the electric control switch is connected to the detection module 125, is controlled by the detection module 125, is located at the connection of the detection module 125, and is used to control the on-off of the gas circuit between the gas circuit module 126 and the detection module 125. The air pump is used to pump the gas in the gas circuit into the detection module 125. The electric control switch can be a solenoid valve.

[0040] The specific working principle is as follows: The present invention forms an equipment box 1 by combining a U-shaped sheet metal frame 11 with an embedded box 12 and an auxiliary heat dissipation device 15, and then installs a top cover 2 and a base 3, and corresponds to a rear heat dissipation hole plate 16 at the rear of the embedded box 12. After the front cover door of the box body 121 is opened, the sliding piece 14 passing through the slide 122 is connected to the built-in connecting rod 1234, and the end of the connecting rod 1234 is fixed to the side wall of the frame 1231, and then the monitoring modules 124 are installed one by one. The detection module 125 and the gas path module 126 are installed on the surface of the sinking carrier 123, and the above three are connected by a wire harness or a pipe. The connected pipe or wire harness is first inserted into the threading hole 1272 in the groove 1271, and then passed into the wire clamp 1273 and the reset spring 1274, and then clamped on another clamp frame on the wire clamp frame 1273, and finally clamped in the wire clamp slot 1233 to connect with the system or module, forming a pipeline or wire harness reservation. When the corresponding maintenance is required, it can be opened by opening the box door in front of the box body 121. The frame 1231 is extended out of the box with the cooperation of the air drying 1234 and the anti-detachment slider 1212, so that the monitoring module 124, the detection module 125, and the air path module 126 are presented outside for easy penetration or inspection and maintenance. When the frame 1231 is displaced, the wiring harness is disengaged from one of the engaged wire clamp racks, and the reserved pipes and wiring harnesses are extended outward with the assistance of the reset spring 1274, which can also prevent the wiring harness from falling off, effectively avoiding the inconvenience of inspection and maintenance in the narrow space inside the box.

[0041] The bending rod 1522 is made of unmodified material, with a pull ring 1521 on the top, embedded in the inner frame plate 151, and the center of the inner frame plate 151 on which the bending rod 1522 is installed is hollowed out, with at least five groups of through grooves 153 on the surface.

[0042] The heat dissipation assembly 154 is provided with at least five groups, one for each of the heat dissipation holes opened on the box body, and the other side corresponds to the rear heat dissipation hole plate, forming a pumping external discharge to achieve the effect of quickly dissipating heat.

[0043] At least three sets of electrically controlled fans 1548 are installed on the fixing plate 1541 , and heat extraction is achieved through the electrically controlled fans 1548 , thereby ensuring that the heat generated by the internal electronic components is discharged.

[0044] Furthermore, the two ends of the fixing plate 1541 are connected by a rotating shaft 1543, and the rotating shaft 1543 is nested in the side wall of the inner clamping plate 151, and the front and rear adjustment of the adjusting hole rod 1545 can realize the alignment output of the electric control fan 1548.

[0045] Further, the through groove 153 is as follows Figure 7In the locally enlarged position, the side wall of the through groove 153 is provided with an inclined slide groove, which is mainly used for the sliding block of the integrated structure on the adjustment hole rod 1545 to slide obliquely, so as to form a restriction while ensuring that the adjustment hole rod 1545 maintains parallel movement to match the swing adjustment of the fixed plate 1541.

[0046] The specific working principle is as follows: The present invention fixes the inner frame plate 151 to the inner wall of the U-shaped sheet metal frame 11 and nests with the limiting pull rod 152, and at the same time, the adjustment hole rod 1545 fixed by the connecting block 1544 on the fixing plate 1541 passes through the through-groove 153, and the slider of the integrated structure on the adjustment hole rod 1545 slides obliquely in the inclined groove on the side wall of the through-groove 153, so as to form a restriction while ensuring that the adjustment hole rod 1545 maintains parallel movement, so as to match the swing adjustment of the fixing plate 1541, and complete the adjustment of the heat dissipation alignment. When adjustment is needed, the pull ring 1 521 is pulled up, so that the pin 1523 on the bending rod 1522 is disengaged from the penetration of the adjustment hole rod 1545, and then a hinged swing is formed with the assistance of the rotating shafts 1543 at both ends of the fixing plate 1541, so as to change the direction of its electric control fan 1548. When the heat of the box body 121 is discharged from the rear hole, the electric control fan 1548 on the fixing frame 1547 is twitched, so that the heat is output from the dust cover 1542 in the air guide groove 1546, and then the heat is directly accelerated from the rear heat dissipation hole plate 16 to achieve an efficient heat dissipation effect.

[0047] Furthermore, the present invention provides a closed switchgear gas component polymerization curve monitoring system, comprising Figure 1-10 The gas component polymerization curve monitoring device for enclosed switchgear and the equipment under test are shown. The gas circuit module 126 in the gas component polymerization curve monitoring device for enclosed switchgear is connected to the filling and exhaust port of the equipment under test through an adapter. The gas component polymerization curve monitoring device for enclosed switchgear periodically collects the mixed gas in the equipment under test for component analysis, and analyzes the fault type of the equipment under test in real time.

[0048] First, by building a fault model to collect data for analysis, a diagnostic reference model is built and integrated into the monitoring module 124. The specific process is as follows: Step 1: simulate different types of discharge faults at different voltage levels and overheating faults at different temperatures in a fault generating device filled with SF6 gas and conventional internal insulating medium; Step 2: Periodically monitor the decomposition components in the SF6 gas in the fault simulation device, mainly monitoring the concentration values ​​of SO2, H2S, and CO; Step 3: The cycle number n of the above SO2, H2S, CO monitoring data is greater than 300, and the cycle interval time is 1h≤t≤2h, where n is a natural number; Step 4: SO2, H2S, and CO monitoring data are aggregated into a curve with the cycle number n as the horizontal axis and the monitoring concentration value as the vertical axis; Step 5: Establish the corresponding relationship between the slope k of the curve changing with time and the voltage level and fault type, and store it as a diagnostic reference model; The specific process of the monitoring module analyzing equipment failure is as follows: Step S1, the gas path module collects the gas in the device under test and sends the collected samples to the detection module; wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Step S2, the detection module analyzes the decomposition components of each sample, determines the concentration values ​​of SO2, H2S, and CO, and obtains the decomposition component data time series sequence which is input into the monitoring module; Step S3, the monitoring module uses the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to perform curve polymerization to obtain the SO2 polymerization curve, the H2S polymerization curve, and the CO polymerization curve; In step S4, the monitoring module compares the obtained aggregation curve with each stored diagnostic reference model to obtain the fault type of the device under inspection.

[0049] Among them, the reference model is built by establishing the corresponding relationship between the slope k of the curve changing with time and the voltage level and fault type, and storing it as a diagnostic reference model. This step is to establish the diagnostic standard. The data detected on site is analyzed using this model to determine whether the equipment has a fault, the fault type, etc. The implementation scheme of using the corresponding relationship between the slope k changing with time and the voltage level and fault type as a model and performing real-time slope k change comparison can refer to the existing technology, such as curve similarity. When the similarities of the three aggregate curves in the device under test are all higher than the threshold, it is considered that the current fault condition meets the model, and the fault characteristics corresponding to the model are used as the current fault condition of the device under test.

[0050] For example, if the decomposition product monitoring is carried out on the gas chamber of a circuit breaker, the monitoring period is 2 hours, and the monitoring aggregation diagram is as follows: Fig.12As shown: the SO2 concentration value increases slowly over time, and then the concentration value increases significantly. After 5 monitoring cycles, the SO2 concentration value fluctuates in a relatively stable range. At the same time, the H2S concentration value is zero, and the CO concentration value is relatively stable without detailed changes. After comparison with the reference fault model, it can be analyzed as follows: This is a suspended potential discharge fault. In the initial stage of the suspended potential discharge fault, the total amount of SO2 produced by decomposition is small. After diffusion and dissolution and the adsorption of the sample gas by the sampling system, the concentration of the decomposed component SO2 monitored is low. As the fault continues to develop, the amount of SO2 produced also increases accordingly. At this time, the diffusion of SO2 intensifies, and the SO2 monitoring value rises rapidly and reaches a relatively stable value, that is, the production, diffusion and adsorption of SO2 reach a relatively balanced state, but its SO2 concentration is still generally within a small range, indicating that the fault energy is small and it is a continuous or intermittent discharge fault. The H2S concentration value is zero, and the CO value has been stable, indicating that the decomposition of the internal insulating material is not involved. The above phenomenon is consistent with the suspended potential discharge fault.

[0051] The connection process of SF6 circuit breaker decomposition products; by connecting the adapter of the quick interface to the filling and exhaust port of the equipment under test, and the adapter is equipped with a filter, and the other end is connected to the back of the gas circuit module through the quick interface, and the doctor holds the back of the connector and pushes it forward in the direction of the panel quick connector. When the doctor hears a "click", he can judge that the connection is complete. If no gas is discharged from the exhaust port of the equipment under test during the connection process, the top screw of the adapter can be raised with a flat-blade screwdriver to achieve the interconnection between the gas under test and the gas circuit module. Finally, a comparison is formed in cooperation with the detection module and the monitoring module above to complete the analysis of the high-voltage SF6 circuit breaker decomposition product polymerization curve.

[0052] Specifically, the fault simulation device is used to simulate various discharge faults, such as corona discharge, suspended potential discharge, conductive metal to ground discharge, and decomposition faults of insulating materials in the equipment caused by different temperature conditions. Due to the different types of faults, the components and concentrations of the decomposition products produced are clearly different. Due to its chemical properties, SF6 decomposition products continue to diffuse and adsorb inside the equipment, and their concentration changes with time with obvious regularity. Aggregating the monitoring data into a curve can visualize the law and serve as a reference model for fault analysis.

[0053] For example, if the decomposition product monitoring is carried out on the gas chamber of a circuit breaker, the monitoring period is 2 hours, and the monitoring aggregation diagram is as follows Figure 2As shown in the figure: the SO2 concentration value increases slowly over time, and then the concentration value increases significantly. After 5 monitoring cycles, the SO2 concentration value fluctuates in a relatively stable range. At the same time, the H2S concentration value is zero, and the CO concentration value is relatively stable without detailed changes. After comparing with the reference fault model, it can be analyzed as follows: This is a suspended potential discharge fault. In the initial stage of the suspended potential discharge fault, the total amount of SO2 produced by decomposition is small. After diffusion and dissolution and the adsorption of the sample gas by the sampling system, the concentration of the decomposed component SO2 monitored is low. As the fault continues to develop, the amount of SO2 produced also increases accordingly. At this time, the diffusion of SO2 intensifies, and the SO2 monitoring value rises rapidly and reaches a relatively stable value, that is, the production, diffusion and adsorption of SO2 reach a relatively balanced state, but its SO2 concentration is still in a relatively small range, indicating that the fault energy is small and it is a continuous or intermittent discharge fault. The H2S concentration value is zero, and the CO value has been stable, indicating that the decomposition of the internal insulating material is not involved. The above phenomenon is consistent with the suspended potential discharge fault.

[0054] Compared with the prior art, the solution of the present invention has the following beneficial effects: 1. The present invention effectively improves the detection rate of latent faults. Compared with routine on-site inspections, the present invention has a large amount of detection sample data, reduces the discreteness of detection data caused by objective factors, and greatly improves the data reliability of fault detection; enriches the diagnostic model of equipment fault types, and compared with existing diagnostic technologies and corresponding standard regulations, can accurately diagnose fault types under different voltage levels.

[0055] 2. The present invention embeds the embedded box between the auxiliary heat sink devices, and the slide rails on the inner wall of the auxiliary heat sink device together with the sliding parts can allow the sinking carrier in the box to perform corresponding displacement, so that when corresponding maintenance and inspection are required, the frame can be moved out of the box, thereby indirectly completing the expansion of its space, which is convenient for subsequent observation, inspection and maintenance.

[0056] 3. The present invention installs auxiliary heat dissipation devices on both sides of the embedded box, and installs the heat dissipation component on the composed inner frame plate. At the same time, with the cooperation of the fixed plate in the heat dissipation component, it can be driven by the rotating shaft to swing in an articulated manner, and the adjustment hole rod fixed on the connecting block passes through the through groove. With the assistance of the limit pull rod, the pin and the hole are penetrated to form a positioning, thereby achieving an adjustable angle of the fixed plate, adapting to the heat conduction position in the box, and realizing efficient heat dissipation.

[0057] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0060] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0061] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0062] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present invention. However, those skilled in the relevant art will understand that the present invention can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A closed switchgear gas component polymerization curve monitoring device, characterized in that: The device comprises a top cover (2), an equipment box (1), and a base (3) which are connected in sequence. The equipment box (1) is composed of a U-shaped sheet metal frame (11), an embedded box (12), an auxiliary heat sink (15), a monitoring module (124), a detection module (125), and an air path module (126). The U-shaped sheet metal frame (11), the auxiliary heat sink (15), and the embedded box (12) are arranged in sequence from the outside to the inside and are all fixedly installed on the base (3). The air path module (126), the detection module (125), and the monitoring module (124) are connected in sequence and are all installed in the embedded box (12). One end of the gas path module (126) is connected to the charging and discharging port of the device under test through an adapter, and the other end is connected to the detection module, so as to collect gas samples in the device under test and pump them into the detection module (125); A gas sensor is provided in the detection module (125) for detecting decomposition component data of the gas sample; and the detection data is sent to the monitoring module (124); the decomposition component data includes SO2, H2S, and CO concentration values; The monitoring module (124) is used to record the time series of decomposition component data of the detected equipment, and further use the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to perform curve aggregation to obtain a SO2 aggregation curve, a H2S aggregation curve, and a CO aggregation curve; compare the obtained aggregation curve with each stored diagnostic reference model to obtain the fault type of the detected equipment; The monitoring module (124), the detection module (125), and the gas path module (126) generate a large amount of heat during operation. The auxiliary heat dissipation device (15) is used to dissipate heat for the monitoring module (124), the detection module (125), and the gas path module (126), thereby preventing the gas sensor from having a reduced sensitivity due to heat and improving the accuracy of data collected by the sensor.

2. The closed switchgear gas component polymerization curve monitoring device according to claim 1, characterized in that: The monitoring module (124) is used to: Analyze the decomposition components of each sample of a single fault event, determine the concentration values ​​of SO2, H2S, and CO, and obtain a time series of decomposition component data; the sample is a mixed gas collected after simulating a fault event in a fault generating device filled with SF6 gas and a conventional internal insulating medium based on a preset fault feature, and the fault event includes different types of discharge faults at different voltage levels and overheating faults at different temperatures; periodically collect samples of a single fault event, wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Further, with the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis, curve polymerization is performed to obtain the SO2 polymerization curve, the H2S polymerization curve, and the CO polymerization curve; Obtain the decomposed component data time series; establish the corresponding relationship between the change of the slope k of the curve over time and the fault characteristics, and store it as a diagnostic reference model.

3. The closed switchgear gas component polymerization curve monitoring device according to claim 1, characterized in that: The U-shaped sheet metal frame (11) comprises a left limit plate, a rear heat dissipation hole plate (16), and a right limit plate which are connected in sequence, and the rear heat dissipation hole plate (16) has a heat dissipation hole structure; The auxiliary heat dissipation device (15) comprises a left inner frame plate fixedly mounted on the inner surface of the left limit plate, a right inner frame plate mounted on the inner surface of the right limit plate, a heat exhaust component support frame, and a heat exhaust component (154); The heat dissipation component (154) comprises a fixed plate (1541), a rotating shaft (1543) fixedly connected to the upper left and right sides of the fixed plate (1541), a connecting block (1544) rotatably connected to the lower left and right sides of the fixed plate (1541), and an adjusting hole rod (1545) connected to the end of the connecting block (1544); the adjusting hole rod (1545) is provided with a group of limit jacks, and a guide slider (1549) is fixedly installed on the adjusting hole rod (1545); N2 air guide grooves (1546) are provided on the fixed plate (1541); a dust cover (1542) is installed at the opening of one side of the air guide groove (1546) facing the rear heat dissipation hole plate (16), and a fixing frame (1547) is installed at the opening of the side facing the embedded box (12), and an electric control fan (1548) is installed on each fixing frame (1547); The heat removal component support frame is fixedly installed between the left inner frame plate and the right inner frame plate; the heat removal component support frame is a hollow structure, and N1 heat removal component installation grooves are provided in the middle from top to bottom for installing N1 heat removal components (154); a pair of rotating shaft holes are provided on the upper part of the inner surface of the left and right sides of the heat removal component installation groove, and the two rotating shafts (1543) of the heat removal component (154) are located on the same axis, and the ends are respectively rotatably connected to the rotating shaft holes of the heat removal component installation groove; N1 through grooves (153) are provided on the left and right hollow cylinders (155) of the heat removal component support frame, and the through grooves (153) Located on the left and right sides of the heat exhaust component installation groove; the through groove (153) is opened along the front-to-back direction; a latch hole is opened on the upper inner wall of the through groove (153); a guide slide groove is opened on each of the left and right inner walls of the through groove (153), and the shape of the guide slide groove is set according to the movement trajectory of the guide slider (1549), and the two adjustment hole rods (1545) are respectively placed in the through groove (153) on the left and right sides of the heat exhaust component installation groove, and the two ends of the guide slider (1549) are respectively slidably connected to the two guide slide grooves of the through groove (153); a limit pull rod (152) is installed in each of the two hollow cylinders (155); The limiting pull rod (152) comprises a pull ring (1521), a bending rod (1522) in a continuous right-angle shape, and a latch assembly (1523); the pull ring (1521) is connected to the top of the bending rod (1522) and is located outside the hollow cylinder (155); the bending rod (1522) comprises a vertical structure and a horizontal structure that are repeatedly connected in a circular shape, the vertical structure is located on the side of the through groove (153), and the horizontal structure is located below the through groove (153), and the through groove (153) is used to limit and prevent the limiting pull rod (152) from being dislocated from the hollow cylinder (155); the latch fixing part in the latch assembly (1523) is fixedly installed on the vertical structure of the bending rod (1522), and the latch fixing part fixes the direction of the latch to be vertically downward and facing the latch through hole, and the latch (1523) is used to insert into the limiting plug hole of the adjustment hole rod (1545) to play a limiting role; The limit rod (152) is lifted upwards to disengage each latch (1523) from the adjustment hole rod (1545); after each fixed plate (1541) is adjusted to a desired angle, the limit rod (152) is lowered to engage each latch (1523) with the adjustment hole rod (1545) again, thereby achieving the aligned output of the fan (1548); each fan (1548) is connected to a sub-controller and is individually controlled by the sub-controller; the sub-controller is mounted on the fixed plate (1541); each sub-controller is connected to a monitoring module (124) and is centrally controlled by the monitoring module (124).

4. The closed switchgear gas component polymerization curve monitoring device according to claim 3, characterized in that: The number N1 of the heat dissipation components (154) is ≥5, one side of which corresponds to the heat dissipation holes opened on the box body (121), and the other side corresponds to the rear heat dissipation hole plate (16), forming a pumping external discharge to achieve the effect of quickly dissipating heat; the number N2 of the electric control fan machines (1548) on the fixed plate (1541) is ≥3.

5. The closed switchgear gas component polymerization curve monitoring device according to claim 4, characterized in that: N3 slide rails (13) are horizontally installed on the inner surface of the left support plate and the inner surface of the right support plate of the auxiliary heat sink (15), and a sliding member (14) is slidably connected to the slide rail (13); The built-in box (12) is composed of a box body (121) and a sinking carrier (123) for placing each module; the front side of the built-in box (12) is open, and the rear side plate has ventilation holes; wherein: N3-1 harness reserved partitions (127) are installed from top to bottom in the box body (121) to form N3 placement slots for placing the sinking rack (123), and the left and right inner walls of each placement slot are provided with side slide slots (1211); a slideway (122) is installed on the inner walls of the two placement slots and at positions corresponding to the side slide slots (1211); the anti-slip slider (1212) sequentially penetrates and is slidably connected to the side slide slots (1211), the slideway (122), and the auxiliary transfer rail (1232); The sinking carrier (123) comprises a U-shaped groove frame (1231) having an outer platform structure, and the auxiliary shift rails (1232) are horizontally installed on the left and right sides of the U-shaped groove frame (1231) and are located below the outer platform structure; the rear sides of the two outer walls of the U-shaped groove frame (1231) are fixedly connected to connecting rods (1234), and the connecting rods (1234) pass through the slideway (122) and are fixedly connected to the surface of the sliding member (14); the U-shaped groove frame (1231) is provided with a wire clamping groove (1233); From top to bottom, a monitoring module (124) is installed in the first sinking carrier, a detection module (125) is installed in the second sinking carrier, and a gas path module (127) is installed in the third sinking carrier; the gas path module (127) and the detection module (125) are connected by a wire harness and a gas path, and the detection module (125) and the monitoring module (124) are connected by a wire harness; A groove (1271) is provided on the reserved partition (127) for wiring harnesses, a group of threading holes (1272) are provided on the surface of the groove (1271), a group of wire clamp frames (1273) are correspondingly provided next to each threading hole (1272), and a group of reset tension springs (1274) are fixedly installed on the side wall of the groove (1271); a group of wire clamp frames (1273) are composed of a fixed wire clamp frame and a movable wire clamp frame; the wire harness or gas pipeline is wound in the reserved partition (127) for wiring harnesses by sequentially passing through the wire clamp frames from the bottom. The wire threading hole (1272), the anti-stripping clamp frame, the movable end of the reset tension spring (1274), and the movable wire clamp frame are formed into a U shape, and then connected to the device through the wire clamp slot (1233) or enter the upper wire harness reserved partition (127), wherein the anti-stripping clamp frame is used to fix the wire harness or the air pipeline to keep it from being dislocated, and the movable wire clamp frame is used to fix the wire harness or the air pipeline but allow the wire harness or the air pipeline to be dislocated under the action of external force; the air pipeline used for air path connection is inserted in and out of the wire threading hole (1272); When the sinking carrier (123) is pushed or pulled inwards or outwards by external force, the connecting rod (1234) drives the sliding member (14) to move in the horizontal direction under the support of the auxiliary moving rail (1232), the slideway (122) and the anti-slip slider (1212), so that the sinking carrier (123) is displaced and extended out of the placement groove or reset; when the sinking carrier (123) extends out of the placement groove, the wire harness or the air path pipeline falls off from the movable wire clamp frame, and the reset tension spring (1274) extends; when the sinking carrier (123) is reset into the placement groove, the reset tension spring (1274) is reset, and the wire harness or the air path pipeline is clamped into the movable wire clamp frame by external force, so that the monitoring module (124), the detection module (125) and the air path module (126) can be observed, inspected and maintained.

6. The closed switchgear gas component polymerization curve monitoring device according to claim 5, characterized in that: The adapter has two interconnected quick interfaces, one of which is connected to the gas inlet of the gas path module (126), and the other is connected to the charging and exhaust outlet of the device under test through an adapter, wherein a filter is installed in the adapter, and the filter is used to filter foreign particles; The gas circuit module (126) has an air pump and an electric control switch; the electric control switch is connected to the detection module (125), is controlled by the detection module (125), is located at the connection of the detection module (125), and is used to control the on-off of the gas circuit between the gas circuit module (126) and the detection module (125); the air pump is used to pump the gas in the gas circuit into the detection module (125).

7. The closed switchgear gas component polymerization curve monitoring device according to claim 6, characterized in that: A roller with a brake is installed on the lower surface of the base (3), and the roller type is a one-way wheel or a universal wheel; and the electric control switch adopts a solenoid valve.

8. A method for monitoring the polymerization curve of gas components in a closed switchgear, characterized in that: The implementation subject is the closed switching gas decomposition product polymerization curve monitoring device according to claims 1 to 7, and the steps include: Step S1, the gas path module collects the gas in the device under test and sends the collected samples to the detection module; wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Step S2, the detection module analyzes the decomposition components of each sample, determines the concentration values ​​of SO2, H2S, and CO, and obtains the decomposition component data time series sequence which is input into the monitoring module; Step S3, the monitoring module uses the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis to perform curve polymerization to obtain a SO2 polymerization curve, a H2S polymerization curve, and a CO polymerization curve; Step S4: the monitoring module compares the obtained aggregation curve with each of the stored diagnostic reference models to obtain the fault type of the device under inspection.

9. The method for monitoring the gas component polymerization curve of a closed switchgear according to claim 8, characterized in that: Before step S1, the method further includes: Step S5, collecting samples of SF6 gas decomposition products; the samples are mixed gases collected after simulating a fault event in a fault generating device filled with SF6 gas and a conventional internal insulating medium based on preset fault characteristics, wherein the fault event includes different types of discharge faults at different voltage levels and overheating faults at different temperatures; periodically collecting samples of single fault events, wherein the number of collection cycles n>300, and the cycle interval time 1h≤t≤2h; Step S6, analyzing the decomposition components of each sample of a single fault event, determining the concentration values ​​of SO2, H2S, and CO, and obtaining a decomposition component data time series sequence; Step S7, taking the cycle number n as the horizontal axis and the three component concentration values ​​as the vertical axis, respectively, curve polymerization is performed to obtain a SO2 polymerization curve, a H2S polymerization curve, and a CO polymerization curve; Step S8, establishing a corresponding relationship between the change of the slope k of the curve over time and the fault characteristics, and storing it as a diagnostic reference model.

10. A closed switchgear gas component polymerization curve monitoring system, comprising a closed switchgear gas component polymerization curve monitoring device as described in any one of claims 1 to 7, and a device under test, wherein the gas circuit module (126) in the closed switchgear gas component polymerization curve monitoring device is connected to the charging and exhausting ports of the device under test via an adapter, and the closed switchgear gas component polymerization curve monitoring device periodically collects mixed gas in the device under test for component analysis, and analyzes the fault type of the device under test in real time.

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