An RPA-based insulating oil micro-water automatic testing device and system

Abstract

This invention relates to the field of insulating oil moisture testing, and discloses an automatic testing device and system for insulating oil moisture based on RPA, comprising: a carrier unit; a drive unit disposed on the carrier unit; and a sampling unit including a sampling component disposed on the carrier unit, wherein the sampling component is provided with a pushing component; wherein, the distance between the pushing component and the sampling component is adjusted by driving the drive unit; it can realize the automatic standardized process of oil sample extraction, injection, and waste discharge, which is easy to operate, effectively improves the detection efficiency, and can realize quantitative sample injection and quantitative injection, improve the accuracy of test data, and effectively avoid the problem of quantity difference between different operators and different injection times.

Description

Technical Field

[0001] This invention relates to the field of insulating oil moisture testing, and in particular to an automatic testing device and system for insulating oil moisture based on RPA. Background Technology

[0002] Insulating oil moisture testing is a crucial step in ensuring the safe operation of oil-based equipment such as transformers and station service transformers, and extending their service life. It is the most direct and effective method to determine the internal insulation operating condition and moisture status of transformers. However, currently, insulating oil moisture testing mostly relies on manual operations such as oil sample extraction, injection, and waste removal. This method is cumbersome, has low testing efficiency, and the sample volume varies with each injection and the individual sample volume, resulting in significant dispersion in the analysis results and directly affecting the test data. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention is proposed.

[0004] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes an automatic testing device and system for insulating oil micro-water based on RPA, which includes a carrier part; a driving part disposed on the carrier part; and a sampling part including a sampling component disposed on the carrier part, wherein the sampling component is provided with a pushing component; wherein, the distance between the pushing component and the sampling component is adjusted by driving the driving part.

[0005] In a preferred embodiment of the RPA-based automatic testing device and system for insulating oil moisture as described in this invention: the bearing part includes a bearing seat, a support seat is provided on the bearing seat, a groove is provided on the support seat, a fixing plate is provided on the support seat, a fixing seat is provided on the side wall of the bearing seat, two fixing rods are provided between the support seat and the fixing seat, a power supply system is provided on the side wall of the bearing seat, and a zero-value limit switch is provided on the support seat; wherein, the fixing plate and the support seat are detachably connected.

[0006] In a preferred embodiment of the RPA-based automatic testing device and system for micro-water in insulating oil described in this invention: the driving unit includes a driving component and a controller mounted on a fixed base; the output end of the driving component is provided with a lead screw; the controller is provided with a touch screen; and the fixed base is provided with an extreme value limit switch.

[0007] In a preferred embodiment of the RPA-based automatic testing device and system for micro-moisture in insulating oil described in this invention: the sampling component includes an injection cylinder disposed in a groove, a piston rod is provided inside the injection cylinder, a liquid level valve, a waste discharge valve and a recovery valve are sealed and connected to the injection cylinder, a first filter element is sealed and connected to both the liquid level valve and the recovery valve, a second filter element is sealed and connected to both the waste discharge valve and the recovery valve, a liquid level bottle and a sample injection tube are respectively provided on the two first filter elements, a waste liquid bottle and a recovery bottle are respectively provided on the two second filter elements, a sample injection needle is provided on the sample injection tube, and a liquid volume sensor is provided on the liquid level valve.

[0008] In a preferred embodiment of the RPA-based automatic testing device and system for insulating oil micro-water as described in this invention: the first filter element includes a first sleeve disposed on the constant liquid valve and the recovery valve, the first sleeve is provided with a sample inlet filter and an injection filter, the sidewalls of the sample inlet filter and the injection filter are provided with two Y-shaped tubes, and the first sleeve is provided with a first protective adhesive; wherein, the two corresponding Y-shaped tubes are respectively connected to the sample injection tube and the constant liquid bottle.

[0009] In a preferred embodiment of the RPA-based automatic testing device and system for insulating oil micro-water as described in this invention: the second filter element includes a second sleeve disposed on the waste discharge valve and the recovery valve, the second sleeve is provided with a one-way filter, the one-way filter is provided with two conduits, and the second sleeve is provided with a second protective adhesive; wherein, the two conduits are respectively connected to the waste liquid bottle and the recovery bottle.

[0010] In a preferred embodiment of the RPA-based automatic testing device and system for insulating oil micro-water as described in this invention: the pushing member includes a pushing plate disposed on a piston rod, the side wall of the pushing plate is provided with a pushing seat, and the side wall of the pushing seat is provided with a connecting plate; wherein, the pushing seat is threadedly connected to the lead screw.

[0011] In a preferred embodiment of the RPA-based automatic testing device and system for micro-water in insulating oil according to the present invention: a detection unit includes a liquid level sensing module and a detection module connected in sequence, wherein the liquid level sensing module is connected to a liquid volume sensor; a control unit includes a main control module, a communication adapter, a drive component control module, a drive module, and a relay control module, wherein the main control module is connected to a touch screen, the drive module is connected to a drive component, and the relay control module is connected to a recovery valve, a waste discharge valve, and a constant liquid valve.

[0012] In a preferred embodiment of the RPA-based automatic testing device and system for micro-water in insulating oil described in this invention: the drive control module, the relay control module, and the detection module all interact with the main control module through a communication adapter.

[0013] In a preferred embodiment of the RPA-based automatic testing device and system for insulating oil moisture as described in this invention: the drive control module is connected to the zero-value limit switch, the extreme-value limit switch, and the drive module.

[0014] The beneficial effects of this invention are as follows: by setting up a support unit, a drive unit, and a sampling unit, an automated and standardized process for oil sample extraction, injection, and waste discharge can be realized. The operation is simple, the detection efficiency is effectively improved, and quantitative injection and quantitative sampling can be realized, thereby improving the accuracy of test data and effectively avoiding the problem of quantity difference between different operators and different injection times. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of an RPA-based automatic testing device for micro-water in insulating oil is shown. Figure 2 A schematic diagram of the first filter element of the RPA-based automatic testing device for micro-water in insulating oil is shown. Figure 3 A cross-sectional view of an RPA-based automatic testing device for micro-moisture in insulating oil is shown. Figure 4 A schematic diagram of the second filter element of the RPA-based automatic testing device for micro-water in insulating oil is shown. Figure 5 A cross-sectional view of an RPA-based automatic testing device for micro-moisture in insulating oil is shown. Figure 6 A schematic diagram of an RPA-based automatic testing system for micro-moisture in insulating oil is shown. Figure 7 A flowchart of an RPA-based automatic testing system for micro-water in insulating oil is shown. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0018] Example 1 Reference Figure 1 This embodiment provides an automatic testing device and system for micro-water in insulating oil based on RPA, including a support unit 1; a driving unit 2, which is disposed on the support unit 1; and a sampling unit 3, which includes a sampling element 31 disposed on the support unit 1, and a pushing element 32 disposed on the sampling element 31; wherein, the distance between the pushing element 32 and the sampling element 31 is adjusted by driving the driving unit 2.

[0019] Specifically, the device is deployed at the insulating oil testing station, and is provided with stable support by the bearing part 1. When the distance between the pushing part 32 and the sampling part 31 increases, the oil sample is extracted. When the distance between the pushing part 32 and the sampling part 31 decreases, the oil sample is injected, thus realizing the automated processing of the oil sample without manual operation.

[0020] Example 2 Reference Figures 1 to 5 This embodiment differs from the first embodiment in that the supporting part 1 includes a supporting seat 11, a support seat 12 is provided on the supporting seat 11, a groove 13 is provided on the support seat 12, a fixing plate 14 is provided on the support seat 12, a fixing seat 15 is provided on the side wall of the supporting seat 11, two fixing rods 16 are provided between the support seat 12 and the fixing seat 15, a power system 17 is provided on the side wall of the supporting seat 11, and a zero-value limit switch 18 is provided on the support seat 12; wherein, the fixing plate 14 and the support seat 12 are detachably connected.

[0021] Specifically, the bearing seat 11 is arranged in an inverted T shape, the support seat 12 is fixedly connected to the bearing seat 11, the support seat 12 is arranged in a U shape, the groove 13 is arranged in an arc shape, the fixed seat 15 is fixedly connected to the bearing seat 11, the two fixed rods 16 are arranged symmetrically, and the two fixed rods 16 are fixedly connected to the support seat 12 and the fixed seat 15. The power system 17 is fixedly connected to the bearing seat 11, the zero limit switch 18 is fixedly installed on the support seat 12, the fixed plate 14 is arranged in a concave shape, and the concave part of the fixed plate 14 and the groove 13 form a circular structure. The fixed plate 14 is detachably connected to the support seat 12 by bolts.

[0022] The drive unit 2 includes a drive component 21 and a controller 22 mounted on a fixed base 15. The output end of the drive component 21 is provided with a lead screw 23, the controller 22 is provided with a touch screen 24, and the fixed base 15 is provided with an extreme limit switch 25.

[0023] Specifically, the drive component 21 is a stepper motor, the lead screw 23 is rotatably connected to the support base 12 and the fixed base 15, the controller 22 is fixedly installed on the fixed base 15, the controller 22 is connected to the power system 17, the extreme value limit switch 25 is fixedly installed on the fixed base 15, and the zero value limit switch 18 is symmetrically arranged with the extreme value limit switch 25.

[0024] The sampling component 31 includes an injection cylinder 311 disposed in the groove 13. A piston rod 312 is disposed inside the injection cylinder 311. A liquid setter valve 3111, a waste discharge valve 3112, and a recovery valve 3113 are sealed and connected to the injection cylinder 311. A first filter element 313 is sealed and connected to both the liquid setter valve 3111 and the recovery valve 3113. A second filter element 314 is sealed and connected to both the waste discharge valve 3112 and the recovery valve 3113. A liquid setter bottle 315 and a sample injection tube 316 are respectively disposed on the two first filter elements 313. A waste liquid bottle 317 and a recovery bottle 318 are respectively disposed on the two second filter elements 314. A sample injection needle 3161 is disposed on the sample injection tube 316. A liquid volume sensor 319 is disposed on the liquid setter valve 3111.

[0025] Specifically, the recess of the fixing plate 14 and the groove 13 form a circular structure that is adapted to the injection cylinder 311, so that when the fixing plate 14 is fixedly connected to the support base 12 by bolts, the injection cylinder 311 is fixed. The piston rod 312 is connected to the injection cylinder 311. The liquid level valve 3111, the waste discharge valve 3112 and the recovery valve 3113 are all three-way solenoid valves. The liquid level bottle 315 is sealed to one of the first filter elements 313. The injection tube 316 is sealed to the other first filter element 313. The liquid volume sensor 319 is connected to the liquid level valve 3111 for real-time acquisition of the liquid volume signal of the oil sample.

[0026] The first filter element 313 includes a first sleeve 3131 disposed on the liquid set valve 3111 and the recovery valve 3113. The first sleeve 3131 is provided with a sample injection filter 3132 and an injection filter 3133. The side walls of the sample injection filter 3132 and the injection filter 3133 are provided with two Y-shaped tubes 3134. The first sleeve 3131 is provided with a first protective adhesive 3135. The two Y-shaped tubes 3134 are respectively connected to the sample injection tube 316 and the liquid set bottle 315.

[0027] Specifically, the corresponding first sleeve 3131 is sealed to the liquid settling valve 3111 and the liquid settling bottle 315 via the Y-shaped tube 3134. The corresponding first sleeve 3131 is also sealed to the recovery valve 3113 and the injection tube 316 via the Y-shaped tube 3134. The Y-shaped tube 3134 is sealed to the injection filter 3132 and the injection filter 3133. The injection filter 3132 and the injection filter 3133 are 5μm small round liquid degassing one-way filters. The injection filter 313... 2 and injection filter 3133 are configured for reverse unidirectional flow, allowing the oil sample to pass through the corresponding filter during the sampling and injection stages respectively. The first protective adhesive 3135 fills the gap in the first sleeve 3131, which serves to protect the sampling filter 3132 and injection filter 3133 and fix the sampling filter 3132 and injection filter 3133 to the first sleeve 3131.

[0028] The second filter element 314 includes a second sleeve 3141 disposed on the waste discharge valve 3112 and the recovery valve 3113. A one-way filter 3142 is disposed inside the second sleeve 3141. Two conduits 3143 are disposed on the one-way filter 3142. A second protective adhesive 3144 is disposed inside the second sleeve 3141. The two conduits 3143 are respectively connected to the waste liquid bottle 317 and the recovery bottle 318.

[0029] Specifically, the corresponding second sleeve 3141 is sealed to the waste discharge valve 3112 and the waste liquid bottle 317 via the conduit 3143. The corresponding second sleeve 3141 is sealed to the recovery valve 3113 and the recovery bottle 318 via the conduit 3143. The conduit 3143 is sealed to the one-way filter 3142. The one-way filter 3142 is a 5μm small round liquid de-aeration one-way filter. The second protective adhesive 3144 is filled in the gaps inside the second sleeve 3141 to protect the one-way filter 3142 and fix the one-way filter 3142 to the second sleeve 3141.

[0030] It should be noted that backflow is effectively prevented by using the injection filter 3132, the injection filter 3133, and the one-way filter 3142.

[0031] The pusher 32 includes a pusher plate 321 disposed on the piston rod 312, a pusher seat 322 disposed on the side wall of the pusher plate 321, and a connecting plate 323 disposed on the side wall of the pusher seat 322; wherein, the pusher seat 322 is threadedly connected to the lead screw 23.

[0032] Specifically, the push plate 321 is fixedly connected to the piston rod 312, and the connecting plate 323 is detachably connected to the push seat 322 by bolts. The push seat 322 has a groove that matches the fixed rod 16, so that the push seat 322 is slidably connected to the fixed rod 16 through the groove. The fixed rod 16 and the groove play a limiting role, so that when the lead screw 23 rotates, the push seat 322 can move left and right under the action of the fixed rod 16 and the lead screw 23. The push plate 321 is located between the connecting plate 323 and the push seat 322. When the connecting plate 323 is fixed to the push seat 322 by bolts, the push plate 321 is fixed between the push seat 322 and the connecting plate 323 so that the piston rod 312 can be moved when the push seat 322 moves.

[0033] In use, the device is deployed at the insulating oil testing station. The syringe 311 is sealed and connected to the liquid leveling valve 3111 and placed in the groove 13. The fixing plate 14 is then fixed to the support base 12 with bolts to fix the syringe 311. After that, the connecting plate 323 is fixed to the push base 322 with bolts. The recovery bottle 318 and the waste liquid bottle 317 are sealed and connected to the recovery valve 3113 and the waste discharge valve 3112 respectively through the second filter element 314. The injection tube 316 and the liquid leveling bottle 315 are sealed and connected to the injection needle 3161 and the liquid leveling valve 3111 respectively through the first filter element 313. After assembly, the injection needle 3161 is inserted into the insulating oil sample to be tested. Then, test parameters such as the number of rinses and the quantitative injection volume are set via the touch screen 24. After starting the device, the drive unit 21 is activated, driving the lead screw 23 to rotate, causing the push seat 322 to move to the right, which in turn drives the piston rod 312 to move to the right. The volume of the injection cylinder 311 increases, the pressure decreases, and a negative pressure is formed. Under the action of the negative pressure, a small amount of the insulating oil sample to be tested passes sequentially through the injection needle 3161, the injection tube 316, one of the first filters 313, and the recovery valve 3113. The waste discharge valve 3112 and the recovery valve 3113 finally enter the syringe 311 to complete the extraction of the washing oil sample. Then, the waste discharge valve 3112 opens, the liquid settling valve 3111 and the recovery valve 3113 close, the screw 23 rotates in the opposite direction, and the push seat 322 drives the piston rod 312 to move to the left, so that the washing oil sample in the syringe 311 is discharged into the waste liquid bottle 317 through the waste discharge valve 3112 and one of the second filter elements 314 until the zero value limit switch 18 is triggered, the drive element 21 stops, and one washing process is completed. The above operation is repeated three times to realize the washing operation. After rinsing, the drive unit 21 is activated, the lead screw 23 rotates, and the push seat 322 drives the piston rod 312 to move to the right to extract the oil sample. At the same time, the liquid volume sensor 319 collects the oil volume in real time to achieve accurate quantitative extraction of the oil sample. When the push seat 322 moves to the right and triggers the extreme value limit switch 25, the drive unit 21 stops. Then, the injection needle 3161 is inserted into the reagent pool of the micro water analyzer. The lead screw 23 rotates in the opposite direction, and the push seat 322 drives the piston rod 312 to move to the left to allow the oil sample in the injection cylinder 311 to enter the reagent pool of the micro water analyzer through the liquid set valve 3111, the waste discharge valve 3112, the recovery valve 3113, the liquid injection tube, and the liquid injection needle. At the same time, the liquid volume sensor 319 achieves quantitative injection of 1 ml, and the micro water content of the oil sample is detected by the reagent pool of the micro water analyzer. After the oil sample injection is completed and the micro-moisture detection is completed, the waste discharge valve 3112 is closed and the recovery valve 3113 is opened. The drive component 21 is started and the lead screw 23 rotates in the reverse direction. The residual oil sample is pushed into the recovery bottle 318 after the air bubbles are filtered out by the recovery valve 3113 and the second filter 314. After the recovery is completed, the drive component 21 drives the push seat 322 to reset to the zero value limit switch 18. After the switch is triggered, the equipment stops operating, completing a complete detection process. The recovered oil sample can be used again for the rinsing operation of the same batch of insulating oil, reducing oil sample waste. The recovery valve 3113 and the one-way filter 3142 work together to achieve one-way recovery, preventing the oil sample in the recovery bottle 318 from flowing back and contaminating the pipeline. In summary, it can realize an automated and standardized process of rinsing, quantification, injection, recovery, and waste discharge. It is easy to operate, improves detection efficiency, and can realize quantitative injection and quantitative sampling, thereby improving the accuracy of test data and effectively avoiding the problem of volume difference between different operators and different injection times.

[0034] Example 3 Reference Figures 6 to 7 This embodiment differs from the first embodiment in that the detection unit 4 includes a liquid level sensing module and a detection module connected in sequence, with the liquid level sensing module connected to the liquid volume sensor 319; the control unit 5 includes a main control module, a communication adapter, a drive component control module, a drive module, and a relay control module, with the main control module connected to the touch screen 24, the drive module connected to the drive component 21, and the relay control module connected to the recovery valve 3113, the waste discharge valve 3112, and the constant liquid valve 3111; the drive component control module, the relay control module, and the detection module all interact with the main control module through the communication adapter; the drive component control module is connected to the zero-value limit switch 18, the extreme-value limit switch 25, and the drive module.

[0035] Specifically, the drive module, relay control module, and drive component control module are all connected to the power supply system 17. The liquid level sensing module collects the real-time liquid volume signal transmitted by the liquid volume sensor 319, converts it into a digital signal, and transmits it to the detection module. The detection module filters, amplifies, and processes the received liquid volume signal to eliminate external interference signals and ensure the accuracy of the liquid volume data. At the same time, it transmits the processed signal to the main control module through a communication adapter. The communication adapter is a 485 communication adapter, which enables stable and efficient signal interaction between the main control module, drive component control module, relay control module, and detection module, ensuring the timeliness of command transmission and data feedback. The main control module is the core control unit module of the system, which can receive test parameter commands input from the touch screen 24 and analyze the signals fed back by each module. Precise motion control commands are issued to each execution module. After receiving the commands from the main control module, the drive component control module issues drive commands to the drive module. At the same time, the drive component control module is also independent and can directly issue drive commands to the drive module based on the switching signals of the zero limit switch 18 and the extreme limit switch 25, so as to realize the precise start and stop, speed adjustment and stroke control of the drive component 21. The relay control module receives the commands from the main control module and controls the on / off and switching of the constant liquid valve 3111, the waste discharge valve 3112 and the recovery valve 3113, so as to cooperate with the drive component 21 to complete the entire process of oil sample extraction, rinsing, sample injection, liquid discharge and recovery. At the same time, the relay control module is also an independent module integrating the relay and the control module. The relay control module can independently control the constant liquid valve 3111, the waste discharge valve 3112 and the recovery valve 3113.

[0036] In use, in conjunction with Example 2, after the injection needle 3161 is inserted into the insulating oil sample to be tested, the core parameters such as the number of rinses, quantitative injection volume, and test duration are input to the main control module via the touch screen 24. After the main control module completes parameter initialization, it sends a start command to each module of the system, and the device enters the fully automatic detection state. First, the main control module sends a rinse command to the drive component control module and the relay control module via the communication adapter. The drive component control module controls the drive module to start the drive component 21, which drives the lead screw 23 to rotate, causing the push seat 322 and the piston rod 312 to move to the right, and the injection cylinder 311... A negative pressure is formed, and the insulating oil sample to be tested enters the injection cylinder 311 through the injection needle 3161, the injection tube 316, and the corresponding first filter element 313 to complete the extraction of the washing oil sample. Subsequently, the relay control module controls the waste discharge valve 3112 to open and the constant liquid valve 3111 and recovery valve 3113 to close. The drive component control module controls the drive component 21 to start, causing the lead screw 23 to rotate in the opposite direction, pushing the piston rod 312 to move to the left, and discharging the washing oil sample through the waste discharge valve 3112 and the corresponding second filter element 314 into the waste liquid bottle 317. The above actions are repeated until the preset number of washing cycles are completed to complete the washing of the pipeline and the injection cylinder 311. After rinsing, the main control module issues a quantitative command. The relay control module controls the waste discharge valve 3112 to close, and the drive component control module controls the output of the drive component 21 to rotate forward, extracting a quantitative oil sample to be tested. The liquid volume sensor 319 collects the liquid volume signal in real time, which is processed by the liquid level sensor module and the detection module and then fed back to the main control module. When the oil sample volume reaches the preset value, the main control module controls the drive component 21 to stop, completing the quantitative injection. Subsequently, the main control module controls the constant liquid valve 3111 to open and the waste discharge valve 3112 and the recovery valve 3113 to close. The drive component control module controls the output of the drive component 21 to rotate in the reverse direction, driving the lead screw 23 to rotate in the reverse direction, injecting the quantitative oil sample into the micro-water analyzer reagent pool through the constant liquid valve 3111 and the corresponding first filter element 313. The micro-water content of the oil sample is then detected through the micro-water analyzer reagent pool. After the test is completed, the main control module controls the waste discharge valve 3112 to close and the recovery valve 3113 to open. The drive component control module controls the output end of the drive component 21 to rotate in the opposite direction, pushing the residual oil sample into the recovery bottle 318 through the recovery valve 3113 and the corresponding second filter element 314 to complete the oil sample recovery. After the recovery is completed, the drive component control module controls the drive component 21 to start, so as to drive the push seat 322 to reset until the zero value limit switch 18 is triggered, and the drive component 21 stops running. During the entire process, if the push seat 322 moves to the limit position and triggers the zero limit switch 18 or the extreme limit switch 25, the drive component control module will immediately control the drive component 21 to stop running, thereby achieving travel limit protection.

[0037] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An automatic testing device for trace moisture in insulating oil based on RPA, characterized in that: include, Supporting part (1); The drive unit (2) is disposed on the support unit (1); The sampling unit (3) includes a sampling member (31) disposed on the support unit (1), and the sampling member (31) is provided with a pushing member (32). The distance between the pusher (32) and the sampling member (31) is adjusted by driving the action of the drive unit (2).

2. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 1, characterized in that: The bearing part (1) includes a bearing seat (11), a support seat (12) is provided on the bearing seat (11), a groove (13) is provided on the support seat (12), a fixing plate (14) is provided on the support seat (12), a fixing seat (15) is provided on the side wall of the bearing seat (11), two fixing rods (16) are provided between the support seat (12) and the fixing seat (15), a power system (17) is provided on the side wall of the bearing seat (11), and a zero-value limit switch (18) is provided on the support seat (12). The fixing plate (14) and the support base (12) are detachably connected.

3. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 2, characterized in that: The drive unit (2) includes a drive component (21) and a controller (22) mounted on a fixed base (15). The output end of the drive component (21) is provided with a lead screw (23). The controller (22) is provided with a touch screen (24). The fixed base (15) is provided with an extreme value limit switch (25).

4. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 2 or 3, characterized in that: The sampling component (31) includes an injection cylinder (311) disposed in a groove (13). The injection cylinder (311) is provided with a piston rod (312). A liquid-fixing valve (3111), a waste discharge valve (3112), and a recovery valve (3113) are sealed and connected to the injection cylinder (3111). A first filter element (313) is sealed and connected to both the liquid-fixing valve (3111) and the recovery valve (3113). A second filter element (314) is sealed and connected to both the waste discharge valve (3112) and the recovery valve (3113). A liquid-fixing bottle (315) and a sample injection tube (316) are respectively provided on the two first filters (313). A waste liquid bottle (317) and a recovery bottle (318) are respectively provided on the two second filters (314). A sample injection needle (3161) is provided on the sample injection tube (316). A liquid volume sensor (319) is provided on the liquid-fixing valve (3111).

5. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 4, characterized in that: The first filter element (313) includes a first sleeve (3131) disposed on the constant liquid valve (3111) and the recovery valve (3113). The first sleeve (3131) is provided with a sample injection filter (3132) and an injection filter (3133). The side walls of the sample injection filter (3132) and the injection filter (3133) are provided with two Y-shaped tubes (3134). The first sleeve (3131) is provided with a first protective adhesive (3135). The two Y-shaped tubes (3134) are respectively connected to the injection tube (316) and the liquid fixation bottle (315).

6. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 5, characterized in that: The second filter element (314) includes a second sleeve (3141) disposed on the waste discharge valve (3112) and the recovery valve (3113), a one-way filter (3142) is disposed inside the second sleeve (3141), two conduits (3143) are disposed on the one-way filter (3142), and a second protective adhesive (3144) is disposed inside the second sleeve (3141). The two conduits (3143) are respectively connected to the waste liquid bottle (317) and the recycling bottle (318).

7. The RPA-based automatic testing device for trace moisture in insulating oil according to claim 4 or 6, characterized in that: The pusher (32) includes a pusher plate (321) disposed on the piston rod (312), the pusher plate (321) has a pusher seat (322) on its side wall, and the pusher seat (322) has a connecting plate (323) on its side wall. The push seat (322) is threadedly connected to the lead screw (23).

8. An automatic testing system for trace moisture in insulating oil based on RPA, characterized in that: Including the RPA-based automatic testing device for trace moisture in insulating oil as described in any one of claims 1 to 7, and The detection unit (4) includes a liquid level sensing module and a detection module connected in sequence, wherein the liquid level sensing module is connected to the liquid volume sensor (319); The control unit (5) includes a main control module, a communication adapter, a drive component control module, a drive module and a relay control module. The main control module is connected to the touch screen (24), the drive module is connected to the drive component (21), and the relay control module is connected to the recovery valve (3113), the waste discharge valve (3112) and the constant liquid valve (3111).

9. The RPA-based automatic testing system for trace moisture in insulating oil according to claim 8, characterized in that: The drive component control module, relay control module, and detection module all interact with the main control module through a communication adapter.

10. The RPA-based automatic testing system for trace moisture in insulating oil according to claim 8 or 9, characterized in that: The drive control module is connected to the zero-value limit switch (18), the extreme-value limit switch (25), and the drive module.

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