Oil-immersed transformer oil level gauge pressure test device based on mechanical sensor

Abstract

The invention relates to the technical field of oil level gauge pressure test devices, and discloses an oil-immersed transformer oil level gauge pressure test device based on a mechanical sensor, which comprises a test box, the inner wall of the test box is fixedly connected with an elastic telescopic rod I, and the elastic telescopic end of the elastic telescopic rod I is fixedly connected with a placement plate. The oil-immersed transformer oil pressure test device comprises a test box, a placement plate is fixedly connected to the top of the test box, a connecting rod is hinged to the top of the placement plate, a fixed plate is fixedly connected to the inner wall of the test box, and a rotating plate is rotatably connected to the top of the fixed plate. The sealing performance deviation caused by the test posture deviation is avoided, meanwhile, the situation that the transformer shakes in the detection process, and the result deviation is large is prevented, the stability of equipment detection is improved, the mechanical sensor at the bottom of the placement plate can reduce the detection error of workers, and the equipment can detect the internal oil pressure more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of oil level gauge pressure testing devices, in particular to an oil-immersed transformer oil level gauge pressure testing device based on a mechanical sensor. Background Art

[0002] Oil-immersed transformers are core equipment in power systems. Accurate monitoring of the internal oil level is directly related to the safe operation of the equipment. The oil level gauge is a key component used to measure the oil level of the transformer, and manual detection is prone to deviations.

[0003] The patent with publication number CN218271331U relates to an oil-immersed transformer oil level gauge pressure test device based on a mechanical sensor, comprising a base and an air inlet pipe, a limit rod connected to the top of the base, and the limit rod is connected to a slot, while the slot is opened at the bottom of the side wall of the protective cover, a pressure test box is provided in the protective cover, and a top plate is connected to the top of the protective cover, while a pressure gauge is connected to the top of the pressure test box, the air inlet pipe is connected to a side wall of the pressure test box, and an oil level gauge connector is provided on the top of the pressure test box, a valve is provided on the air inlet pipe, and the end of the air inlet pipe away from the pressure test box is connected to the pipe connector, while the pipe The road connecting piece is arranged on the outside of the protective cover. In this patent, the protective cover and the top plate can cover the pressure test box on the base, so as to protect the inspection personnel when an inspection accident occurs, that is, the oil level gauge fails to release the pressure and the oil tank ruptures, thereby improving the safety of the device. However, when the device performs a pressure test on the oil level gauge of the oil-immersed transformer, it is easy to cause the transformer to shake, and it is difficult to ensure the stability of the test, which is easy to cause detection deviation. At the same time, it is difficult to ensure the accuracy of the oil pressure detection in the device, which reduces the efficiency of the equipment test. Therefore, a pressure test device for an oil-immersed transformer oil level gauge based on a mechanical sensor is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide an oil-immersed transformer oil level gauge pressure testing device based on a mechanical sensor.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pressure test device for an oil-immersed transformer oil level gauge based on a mechanical sensor, comprising a test box, an oil inlet is opened on the inner wall of the test box, an air valve is fixedly connected to the inner wall of the test box, an elastic telescopic rod 1 is fixedly connected to the inner wall of the test box, the elastic telescopic end of the elastic telescopic rod 1 is fixedly connected to a placement plate, a connecting rod is hinged on the top of the placement plate, the inner wall of the test box is fixedly connected to a fixed plate, the top of the fixed plate is rotatably connected to a rotating plate, and the side of the rotating plate away from the fixed plate is fixedly connected to an elastic telescopic rod 2. The elastic telescopic end of the elastic telescopic rod second is fixedly connected to the pressure plate one. When the pressure test is performed, the placement plate is first moved downward to drive the pressure plate to press the two sides of the oil-immersed transformer oil, thereby avoiding the deviation of the sealing performance caused by the deviation of the test posture. At the same time, it prevents the transformer from shaking during the test, which leads to a large deviation in the result, improves the stability of the equipment for testing, reduces the time for manual installation, and saves the cost of testing; the inner wall of the placement plate is slidably connected to the telescopic movable frame, the top of the telescopic movable frame is fixedly connected to the movable plate, and the side of the movable plate close to the placement plate is fixedly connected to the elastic telescopic rod Third, the elastic telescopic end of the elastic telescopic rod three is fixedly connected with a pressure plate two, rollers are arranged on both sides of the telescopic movable frame, and the inner wall of the test box is fixedly connected with a guide plate; while the transformer is pressed, the placement plate moves to drive the pressure plate two to center the transformer, preventing the transformer from deviating when fixed, resulting in inaccurate test results, reducing the shaking of the transformer during the test, improving the stability of the test, and avoiding the deviation of the oil level gauge reading due to incorrect position, thereby ensuring accurate measurement of the oil level; the inner wall of the test box is provided with a bubble elimination mechanism for eliminating foam or bubbles, The inner wall of the test box is provided with a temperature control mechanism for controlling the oil temperature; the placement plate is in contact with the outer surface of the fixed plate, the top of the connecting rod is hinged to the side of the rotating plate close to the placement plate, the inner wall of the guide plate is provided with an inclined groove, and the circumferential surface of the roller is in contact with the inclined groove of the inner wall of the guide plate. The inner wall of the test box is installed with an oil-immersed transformer oil level gauge for detecting the internal oil pressure, and the bottom of the placement plate is provided with a mechanical sensor for pressure detection, wherein the mechanical sensor at the bottom of the placement plate can reduce the detection error of the staff, so that the equipment can detect the internal oil pressure more accurately.

[0006] Preferably, the bubble elimination mechanism includes a clamping block, the top of the clamping block is fixedly connected with a connecting plate, the front and rear sides of the rotating plate are fixedly connected with buckles, when being pressed, the rotating plate rotates to drive the clamping block to cooperate with the buckles to limit the rotating plate, the limiting reduces the risk of movement or accidental tilting of the transformer during operation, thereby enhancing the safety of the staff, providing additional safety protection, and improving the stability of equipment testing; the inner wall of the test box is rotationally connected with a reciprocating screw rod one, the circumferential surface of the reciprocating screw rod one is movably connected with a capture box, the inner wall of the capture box is rotationally connected with a reciprocating screw rod two, the left side of the reciprocating screw rod two is fixedly connected with a gear one, the inner wall of the test box is fixedly connected with a rack one, the circumferential surface of the reciprocating screw rod one is movably connected with a defoaming plate, when the oil level gauge is pressure tested, the defoaming plate is driven by the reciprocating screw rod one to move reciprocally, further eliminating bubbles in the capture box, which helps to maintain the good insulation performance of the oil, ensures the safe and stable operation of the transformer, avoids overheating of the transformer, prolongs the service life of the equipment, reduces these adverse phenomena, improves the operation stability and comfort of the transformer, and makes the equipment testing more stable; the inner wall of the fixed plate is slidably connected with the clamping block, the connecting plate is slidably connected with the inner wall of the fixed plate through a spring, the buckle is in contact with the front and rear sides of the fixed plate, the front side of the test box is fixedly connected with a motor, the output end of the motor is fixedly connected with the front end of the reciprocating screw rod one, the inner wall of the test box is provided with a sliding groove, the inner wall sliding groove of the test box is slidably connected with the capture box, the defoaming plate is in contact with the inner wall of the capture box, the circumferential surface of the gear one is engaged with the top of the rack one, and the gear one moves along the movement track of the rack one.

[0007] Preferably, the temperature control mechanism comprises a blocking plate, the rear side of the blocking plate is fixedly connected with a long plate, the front side of the capture box is fixedly connected with a clamping plate, when the bubbles are eliminated, the capture box releases the limiting of the blocking plate, the blocking plate is contacted and limited to move downward by the spring to block the air outlet of the air valve, thereby realizing the effect of preventing leakage, effectively preventing external pollutants, moisture, gas and the like from entering the inside of the equipment, maintaining the insulation performance, internal cleanliness and stability of the equipment, enhancing the safety of the equipment, reducing the risk of failure, and improving the overall reliability and service life of the equipment, further making the test more stable, preventing internal air pressure instability, improving the accuracy of the test; the bottom of the capture box is fixedly connected with a fixed block, the inner wall of the fixed block is rotatably connected with a rotating rod, the two ends of the rotating rod are fixedly connected with a second gear, the circumferential surface of the rotating rod is fixedly connected with a temperature controller, the inner wall of the test box is fixedly connected with a second rack, while eliminating the foam, the capture box drives the temperature controller to rotate and control the temperature, reduces the oil deterioration process, prolongs the service life of the equipment, helps to ensure the fluidity of the oil, enhances the heat transfer effect, improves the stability, safety, efficiency of the equipment, at the same time prolongs the service life of the equipment, reduces the maintenance cost, and improves the reliability of the overall system.

[0008] The technical scheme disclosed in the present application can bring the following beneficial effects:

[0009] 1. The oil level gauge pressure testing device for oil-immersed transformer based on a mechanical sensor, through the cooperation and operation between the test box, the oil level gauge connecting port, the air valve, the elastic expansion rod one, the mounting plate, the connecting rod, the fixed plate, the rotating plate, the elastic expansion rod two, the pressing plate one, the moving frame, the moving plate, the elastic expansion rod three, the pressing plate two, the guide plate and the roller, when pressure testing, the mounting plate is first moved downward to drive the pressing plate one to press the two sides of the oil-immersed transformer oil tightly, avoids the deviation of the sealing performance caused by the deviation of the test posture, prevents the transformer from shaking during detection, reduces the deviation of the test results, improves the stability of the equipment during detection, reduces the installation time of the workers, saves the detection cost; while pressing the transformer, the mounting plate is moved to drive the pressing plate two to centrally position the transformer, prevents the deviation of the transformer during fixing, causes the test results to be inaccurate, reduces the shaking of the transformer during testing, improves the stability of the test, avoids the deviation of the oil level gauge reading caused by the incorrect position, thereby ensuring the accurate measurement of the oil level, wherein the mechanical sensor at the bottom of the mounting plate can reduce the detection error of the workers, makes the detection of the internal oil pressure of the equipment more accurate.

[0010] 2、The oil-immersed transformer oil level meter pressure testing device based on a mechanical sensor, through the cooperation operation between the buckle, the clamping block and the connecting plate, when being pressed, the rotating plate rotates to drive the clamping block and the buckle to cooperate to limit the rotating plate, the limiting reduces the risk of movement or accidental tilting of the transformer during operation, thereby enhancing the safety of the staff, providing additional safety protection, and improving the stability of equipment testing.

[0011] 3、The oil-immersed transformer oil level meter pressure testing device based on a mechanical sensor, through the cooperation operation between the capture box, the reciprocating screw rod one, the gear one, the rack one, the defoaming plate and the reciprocating screw rod two, when the oil level meter is pressure tested, the defoaming plate is driven by the reciprocating screw rod one to move reciprocally, further eliminating the bubbles in the capture box, which is helpful to maintain the good insulation performance of the oil, ensure the safe and stable operation of the transformer, avoid overheating of the transformer, prolong the service life of the equipment, reduce these adverse phenomena, improve the operation stability and comfort of the transformer, and make the equipment testing more stable.

[0012] 4、The oil-immersed transformer oil level meter pressure testing device based on a mechanical sensor, through the cooperation operation between the blocking plate, the long plate and the clamping plate, when the bubbles are eliminated, the capture box releases the limiting of the blocking plate, the blocking plate contacts the limiting and moves downward through the spring to block the gas outlet of the gas valve, thereby realizing the effect of preventing leakage, effectively preventing external pollutants, moisture and gas from entering the equipment, maintaining the insulation performance, internal cleanliness and stability of the equipment, enhancing the safety of the equipment, reducing the risk of failure, and improving the overall reliability and service life of the equipment, further making the testing more stable, preventing internal air pressure from being unstable, and improving the accuracy of the testing.

[0013] 5、The oil-immersed transformer oil level meter pressure testing device based on a mechanical sensor, through the cooperation operation between the fixing block, the rotating rod, the gear two, the rack two and the temperature controller, while eliminating the foam, the capture box drives the temperature controller to rotate and control the temperature, reduces the degradation process of the oil, prolongs the service life of the equipment, helps to ensure the fluidity of the oil, enhances the heat transfer effect, improves the stability, safety and efficiency of the equipment, prolongs the service life of the equipment, reduces the maintenance cost, and improves the reliability of the overall system. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 It is a schematic diagram of the pressing plate one structure of the present application;

[0016] Figure 3 It is a schematic diagram of the pressing plate two structure of the present application;

[0017] Figure 4 For the application Figure 3 Enlarged view of structure at A in the application;

[0018] Figure 5 For the application card block structure schematic;

[0019] Figure 6 For the application Figure 5 Enlarged view of structure at B in the application;

[0020] Figure 7 For the application capture box structure schematic;

[0021] Figure 8 For the application Figure 7 Enlarged view of structure at C in the application;

[0022] Figure 9 For the application temperature controller structure schematic;

[0023] Figure 10 For the application Figure 9 Enlarged view of structure at D in the application.

[0024] In the figure: 1, test box; 2, oil inlet; 3, gas valve; 4, bubble elimination mechanism; 41, buckle; 42, card block; 43, connecting plate; 44, capture box; 45, reciprocating screw rod one; 46, gear one; 47, rack one; 48, defoaming plate; 49, reciprocating screw rod two; 5, temperature control mechanism; 51, barrier plate; 52, long plate; 53, clamping plate; 54, fixed block; 55, rotating rod; 56, gear two; 57, rack two; 58, temperature controller; 6, elastic telescopic rod one; 7, setting plate; 8, connecting rod; 9, fixed plate; 10, rotating plate; 11, elastic telescopic rod two; 12, pressing plate one; 13, telescopic moving frame; 14, moving plate; 15, elastic telescopic rod three; 16, pressing plate two; 17, guide plate; 18, roller. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0026] Please refer to Figures 1-10One embodiment of the application is: a mechanical sensor-based oil-immersed transformer oil level gauge pressure testing device, comprising a test box 1, an oil inlet 2 is formed in the inner wall of the test box 1, a gas valve 3 is fixedly connected to the inner wall of the test box 1, an elastic telescopic rod 6 is fixedly connected to the inner wall of the test box 1, an elastic telescopic end of the elastic telescopic rod 6 is fixedly connected to a placement plate 7, a connecting rod 8 is hingedly connected to the top of the placement plate 7, a fixed plate 9 is fixedly connected to the inner wall of the test box 1, a rotating plate 10 is rotatably connected to the top of the fixed plate 9, an elastic telescopic rod 11 is fixedly connected to the side of the rotating plate 10 away from the fixed plate 9, and an elastic telescopic end of the elastic telescopic rod 11 is fixedly connected to a pressing plate 12;

[0027] When the oil-immersed transformer oil level gauge is detected, the oil-immersed transformer is first placed into the test box 1 by the staff, and then the top cover is sealed. At this time, the internal air pressure is controlled through the gas valve 3. After the control is completed, oil can be poured into the test box 1 through the oil inlet 2. At the same time, when the oil-immersed transformer is placed on the placement plate 7, the placement plate 7 will be driven to move downward due to the heavy weight of the oil-immersed transformer. The downward movement of the placement plate 7 will drive the connecting rod 8 to move downward through the hinge point. The downward movement of the connecting rod 8 will drive the rotating plate 10 to rotate through the hinge point. The rotating plate 10 drives the elastic telescopic rod 11 to rotate. The elastic telescopic rod 11 drives the pressing plate 12 to rotate. The rotation of the pressing plate 12 will press the two sides of the oil-immersed transformer oil tightly, avoiding the deviation of the sealing performance caused by the deviation of the test posture. At the same time, it prevents the transformer from shaking during detection, resulting in a large deviation. The stability of the equipment for detection is improved, the time for manual installation is reduced, and the cost of detection is saved. The mechanical sensor at the bottom of the placement plate 7 during detection of the oil level gauge can reduce the detection error of the staff, making the detection of the internal oil pressure of the equipment more accurate.

[0028] The inner wall of the placement plate 7 is slidably connected to a telescopic moving frame 13, the top of the telescopic moving frame 13 is fixedly connected to a moving plate 14, one side of the moving plate 14 close to the placement plate 7 is fixedly connected to an elastic telescopic rod 15, an elastic telescopic end of the elastic telescopic rod 15 is fixedly connected to a pressing plate 16, two sides of the telescopic moving frame 13 are provided with rollers 18, and the inner wall of the test box 1 is fixedly connected to a guide plate 17; the inner wall of the test box 1 is provided with a bubble elimination mechanism 4 for eliminating bubbles or gas, and the inner wall of the test box 1 is provided with a temperature control mechanism 5 for controlling the oil temperature; the outer surfaces of the placement plate 7 and the fixed plate 9 are in contact, the top of the connecting rod 8 is hingedly connected to one side of the rotating plate 10 close to the placement plate 7, the inner wall of the guide plate 17 is provided with an inclined groove, the circumferential surface of the roller 18 is in contact with the inclined groove of the inner wall of the guide plate 17, the inner wall of the test box 1 is provided with an oil-immersed transformer oil level gauge for detecting the internal oil pressure, and the bottom of the placement plate 7 is provided with a mechanical sensor for pressure detection;

[0029] When the transformer is pressed, the setting plate 7 moves to drive the telescopic moving frame 13 to move, the telescopic moving frame 13 drives the roller 18 to move, the circumferential surface of the roller 18 is in contact with the inner wall of the guide plate 17, so that the roller 18 moves along the inclined groove of the inner wall of the guide plate 17, the roller 18 moves to drive the telescopic moving frame 13 to gather in the middle, the telescopic moving frame 13 drives the elastic telescopic rod three 15 to gather in the middle, the elastic telescopic rod three 15 drives the pressing plate two 16 to gather in the middle through the elastic telescopic end, so that the transformer is centrally positioned, the deviation of the transformer during fixing is prevented, the test result is not accurate, the shaking of the transformer during testing is reduced, the stability of the test is improved, the reading deviation of the oil level meter due to the incorrect position is avoided, and the accurate measurement of the oil level is ensured.

[0030] Working principle: when pressure test, first through the setting plate 7 down drive pressing plate one 12 to the both sides of the oil-immersed transformer oil is pressed tightly, avoid due to the test posture deviation leads to the sealing performance appears deviation, improve the stability of the equipment detection;When the transformer is pressed, the setting plate 7 moves to drive the pressing plate two 16 to centrally position the transformer, prevent the transformer from deviating during fixing, improve the stability of the test.

[0031] Please refer to Figures 1-10 On the basis of the above embodiment, in another embodiment of the present application, the bubble eliminating mechanism 4 comprises a clamping block 42, the top of the clamping block 42 is fixedly connected with a connecting plate 43, and the front and rear sides of the rotating plate 10 are fixedly connected with buckles 41;

[0032] When the transformer is pressed, the rotating plate 10 rotates to drive the buckle 41 to rotate, the buckle 41 rotates to contact the inclined surface of the clamping block 42 through the inclined surface, so as to drive the clamping block 42 to move, the clamping block 42 drives the connecting plate 43 to move, when the buckle 41 enters the inner wall of the clamping block 42, the connecting plate 43 will be reset through the spring, the connecting plate 43 drives the clamping block 42 to move, the rotating plate 10 is limited through the cooperation of the clamping block 42 and the buckle 41, the risk of movement or accidental tilting of the transformer during operation is reduced, the safety of the staff is enhanced, additional safety protection is provided, and the stability of the equipment test is improved;

[0033] The inner wall of the test box 1 is rotationally connected with a reciprocating wire rod one 45, the circumferential surface of the reciprocating wire rod one 45 is movably connected with a capture box 44, the inner wall of the capture box 44 is rotationally connected with a reciprocating wire rod two 49, the left side of the reciprocating wire rod two 49 is fixedly connected with a gear one 46, the inner wall of the test box 1 is fixedly connected with a rack one 47, the circumferential surface of the reciprocating wire rod one 45 is movably connected with a defoaming plate 48; the inner wall of the fixed plate 9 is slidably connected with the clamping block 42, the connecting plate 43 is slidably connected with the inner wall of the fixed plate 9 through a spring, the buckle 41 is in contact with the front and rear sides of the fixed plate 9, the front side of the test box 1 is fixedly connected with a motor, the output end of the motor is fixedly connected with the front end of the reciprocating wire rod one 45, the inner wall of the test box 1 is provided with a sliding groove, the inner wall sliding groove of the test box 1 is slidably connected with the capture box 44, the defoaming plate 48 is in contact with the inner wall of the capture box 44, the circumferential surface of the gear one 46 is meshed with the top of the rack one 47, and the gear one 46 moves along the movement track of the rack one 47;

[0034] When the oil level gauge is pressure tested, the staff starts the motor to work, the motor works to drive the reciprocating wire rod one 45 to rotate, the reciprocating wire rod one 45 rotates to contact the capture box 44 through the reciprocating sliding groove on the circumferential surface, so as to drive the capture box 44 to reciprocate, the capture box 44 drives the reciprocating wire rod two 49 to reciprocate, the reciprocating wire rod two 49 drives the gear one 46 to reciprocate, the gear one 46 moves to mesh with the top teeth of the rack one 47 through the teeth on the circumferential surface, so as to drive the gear one 46 to rotate, the gear one 46 drives the reciprocating wire rod two 49 to rotate, the reciprocating wire rod two 49 rotates to contact the inner wall of the defoaming plate 48 through the reciprocating sliding groove on the circumferential surface, so as to drive the defoaming plate 48 to reciprocate, further eliminating the bubbles in the capture box 44, which helps to maintain the good insulation performance of the oil, ensures the safe and stable operation of the transformer, avoids the overheating of the transformer, prolongs the service life of the equipment, reduces these adverse phenomena, improves the operation stability and comfort of the transformer, and makes the equipment test more stable.

[0035] Working principle: when the pressing is performed, the rotating plate 10 rotates to drive the clamping block 42 and the buckle 41 to cooperate to limit the rotating plate 10, the limiting reduces the risk of movement or accidental tilting of the transformer in the operation process, and improves the stability of the equipment test; when the oil level gauge is pressure tested, the reciprocating wire rod one 45 drives the defoaming plate 48 to reciprocate, further eliminating the bubbles in the capture box 44, which helps to maintain the good insulation performance of the oil, ensures the safe and stable operation of the transformer, improves the operation stability and comfort of the transformer, and makes the equipment test more stable.

[0036] The temperature control mechanism 5 comprises a blocking plate 51, the rear side of the blocking plate 51 is fixedly connected with a long plate 52, the front side of the capture box 44 is fixedly connected with a clamping plate 53;

[0037] When the bubbles are eliminated, the capture box 44 moves the card plate 53 to move, the card plate 53 moves to no longer contact the bottom of the long plate 52, thereby releasing the blocking of the blocking plate 51, the blocking plate 51 is contacted and limited to be moved downward by the spring, the blocking plate 51 is moved downward to block the air outlet of the air valve 3, thereby realizing the effect of preventing leakage, effectively preventing external pollutants, moisture, gas and the like from entering the inside of the equipment, maintaining the insulation performance, internal cleanliness and stability of the equipment, enhancing the safety of the equipment, reducing the risk of failure, and improving the overall reliability and life of the equipment, further making the test more stable, preventing internal air pressure instability, and improving the accuracy of the test.

[0038] The bottom of the capture box 44 is fixedly connected with a fixed block 54, the inner wall of the fixed block 54 is rotatably connected with a rotating rod 55, both ends of the rotating rod 55 are fixedly connected with a gear two 56, the circumferential surface of the rotating rod 55 is fixedly connected with a temperature controller 58, and the inner wall of the test box 1 is fixedly connected with a rack two 57; the blocking plate 51 is slidably connected with the inner wall of the test box 1 through the spring, and the blocking plate 51 moves on the movement track of the air outlet of the air valve 3, the long plate 52 is in contact with the inner wall of the test box 1, the bottom of the long plate 52 is in contact with the top of the card plate 53, the circumferential surface of the gear two 56 is engaged with the top of the rack two 57, and the gear two 56 will move along the movement track of the rack two 57, and the temperature controller 58 is used for controlling the internal oil temperature of the test box 1.

[0039] When the bubbles are eliminated, the capture box 44 moves the card plate 53 to move, the card plate 53 moves to no longer contact the bottom of the long plate 52, thereby releasing the blocking of the blocking plate 51, the blocking plate 51 is contacted and limited to be moved downward by the spring, the blocking plate 51 is moved downward to block the air outlet of the air valve 3, thereby realizing the effect of preventing leakage, effectively preventing external pollutants, moisture, gas and the like from entering the inside of the equipment, maintaining the insulation performance, internal cleanliness and stability of the equipment, enhancing the safety of the equipment, reducing the risk of failure, and improving the overall reliability and life of the equipment, further making the test more stable, preventing internal air pressure instability, and improving the accuracy of the test.

[0040] Working principle: when the bubbles are eliminated, the capture box 44 releases the blocking of the blocking plate 51, the blocking plate 51 is contacted and limited to be moved downward by the spring to block the air outlet of the air valve 3, thereby realizing the effect of preventing leakage, preventing internal air pressure instability, and improving the accuracy of the test; when the bubbles are eliminated, the capture box 44 drives the temperature controller 58 to rotate and control the temperature, reduces the deterioration process of the oil, prolongs the service life of the equipment, helps to ensure the fluidity of the oil, enhances the heat transfer effect, improves the stability, safety, efficiency and service life of the overall system, reduces the maintenance cost, and improves the reliability of the overall system.

[0041] The application provides a mechanical sensor-based oil-immersed transformer oil level gauge pressure testing device, and there are many methods and approaches to specifically realize the technical scheme. The above description is only the preferred embodiment of the application, and it should be pointed out that, for ordinary skilled in the art, several improvements and refinements can be made without departing from the principle of the application, and these improvements and refinements should also be regarded as the protection scope of the application. The components not explicitly described in the embodiment can be realized by using the prior art.

Claims

1. A pressure test device for an oil-immersed transformer oil level gauge based on a mechanical sensor, comprising a test box (1), characterized in that: The inner wall of the test box (1) is provided with an oil inlet (2), the inner wall of the test box (1) is fixedly connected to an air valve (3), the inner wall of the test box (1) is fixedly connected to an elastic telescopic rod (6), the elastic telescopic end of the elastic telescopic rod (6) is fixedly connected to a placement plate (7), the top of the placement plate (7) is hinged with a connecting rod (8), the inner wall of the test box (1) is fixedly connected to a fixed plate (9), the top of the fixed plate (9) is rotatably connected to a rotating plate (10), and the side of the rotating plate (10) away from the fixed plate (9) is fixedly connected to an elastic telescopic rod (11). The elastic telescopic end of the second elastic telescopic rod (11) is fixedly connected to the first pressure plate (12), the inner wall of the placement plate (7) is slidably connected to the telescopic movable frame (13), the top of the telescopic movable frame (13) is fixedly connected to the movable plate (14), the side of the movable plate (14) close to the placement plate (7) is fixedly connected to the third elastic telescopic rod (15), the elastic telescopic end of the third elastic telescopic rod (15) is fixedly connected to the second pressure plate (16), rollers (18) are arranged on both sides of the telescopic movable frame (13), and the inner wall of the test box (1) is fixedly connected to the guide plate (17).

2. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 1, characterized in that: The inner wall of the test box (1) is provided with a bubble elimination mechanism (4) for eliminating floating foam or bubbles, and the inner wall of the test box (1) is provided with a temperature control mechanism (5) for controlling the oil temperature.

3. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 2, characterized in that: The placement plate (7) contacts the outer surface of the fixed plate (9), the top of the connecting rod (8) is hinged to the side of the rotating plate (10) close to the placement plate (7), the inner wall of the guide plate (17) is provided with an inclined groove, the circumferential surface of the roller (18) contacts the inclined groove of the inner wall of the guide plate (17), the inner wall of the test box (1) is installed with an oil-immersed transformer oil level gauge for detecting the internal oil pressure, and the bottom of the placement plate (7) is provided with a mechanical sensor for pressure detection.

4. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 3, characterized in that: The bubble elimination mechanism (4) comprises a clamping block (42), the top of the clamping block (42) is fixedly connected to a connecting plate (43), and the front and rear sides of the rotating plate (10) are fixedly connected to buckles (41).

5. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 4, characterized in that: The inner wall of the test box (1) is rotatably connected to a reciprocating screw rod 1 (45), the circumferential surface of the reciprocating screw rod 1 (45) is movably connected to a capture box (44), the inner wall of the capture box (44) is rotatably connected to a reciprocating screw rod 2 (49), the left side of the reciprocating screw rod 2 (49) is fixedly connected to a gear rod 1 (46), the inner wall of the test box (1) is fixedly connected to a rack rod 1 (47), and the circumferential surface of the reciprocating screw rod 1 (45) is movably connected to a defoaming plate (48).

6. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 5, characterized in that: The inner wall of the fixed plate (9) is slidably connected to the block (42), the connecting plate (43) is slidably connected to the inner wall of the fixed plate (9) through a spring, the buckle (41) contacts the front and rear sides of the fixed plate (9), the front side of the test box (1) is fixedly connected to a motor, the output end of the motor is fixedly connected to the front end of the reciprocating screw rod (45), the inner wall of the test box (1) is provided with a slide groove, the inner wall slide groove of the test box (1) is slidably connected to the capture box (44), the defoaming plate (48) contacts the inner wall of the capture box (44), the circumferential surface of the gear (46) is meshed with the top of the rack (47), and the gear (46) will move along the motion trajectory of the rack (47).

7. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 6, characterized in that: The temperature control mechanism (5) comprises a baffle plate (51), a long plate (52) is fixedly connected to the rear side of the baffle plate (51), and a clamping plate (53) is fixedly connected to the front side of the capture box (44).

8. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 7, characterized in that: The bottom of the capture box (44) is fixedly connected to a fixed block (54), the inner wall of the fixed block (54) is rotatably connected to a rotating rod (55), both ends of the rotating rod (55) are fixedly connected to a second gear (56), the circumferential surface of the rotating rod (55) is fixedly connected to a temperature controller (58), and the inner wall of the test box (1) is fixedly connected to a second rack (57).

9. The oil level gauge pressure test device for an oil-immersed transformer based on a mechanical sensor according to claim 8, characterized in that: The baffle plate (51) is slidably connected to the inner wall of the test box (1) through a spring, and the baffle plate (51) moves on the motion trajectory of the air outlet of the air valve (3). The long plate (52) contacts the inner wall of the test box (1), and the bottom of the long plate (52) contacts the top of the clamping plate (53). The circumferential surface of the gear 2 (56) is engaged with the top of the rack 2 (57), and the gear 2 (56) will move along the motion trajectory of the rack 2 (57). The temperature controller (58) is used to control the internal oil temperature of the test box (1).

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