Withstand voltage testing device and method thereof, and application of withstand voltage testing device and method in current transformer

Abstract

The invention discloses a withstand voltage test device and method and application in a current transformer, and relates to the technical field of current transformer tests.The withstand voltage test device comprises a conveying assembly, a bearing mechanism, a butt joint frame, a connecting seat, a pushing assembly and a supporting box, the butt joint frame comprises a fixing seat, and a telescopic assembly is arranged on the fixing seat; the telescopic assembly comprises a fixed part and a telescopic part, one side of the fixed part and one side of the telescopic part are provided with a first hollow cylinder and a second hollow cylinder respectively, the telescopic part in the telescopic assembly horizontally moves to extrude the elastic bag between the telescopic part and the connecting seat, and the elastic bag generates downward airflow; the heat dissipation efficiency of heat near the current transformer is improved in cooperation with the heat dissipation assembly, when a fire breaks out in a voltage withstanding test of the current transformer, flame-retardant powder is guided into the exhaust hood through the powder supply assembly, and then in the extrusion process of the elastic bag, downward airflow carries the flame-retardant powder to be sprayed to the current transformer to cover a fire breakout point and extinguish the fire breakout point.

Description

Technical Field

[0001] The present invention relates to the technical field of current transformer testing, and specifically to a withstand voltage testing device and method thereof, and an application in a current transformer. Background Technique

[0002] Current transformers are used in power systems to convert large currents into small currents in proportion for use by measuring, protecting and other equipment. The insulation stability during the operation of current transformers is a key factor determining whether the equipment can operate normally and safely. To comply with the safety standards and specifications during the production and use of power equipment, withstand voltage testing should be carried out on current transformers to verify whether the current transformers meet these standards.

[0003] Chinese Patent with publication number CN220323527U discloses a fully automatic insulation withstand voltage testing device for transformers, including a base. A first machine cover is fixedly arranged on the front end face of the base. A first motor is fixedly arranged on the inner bottom of the first machine cover. The output end of the first motor is fixedly provided with a unidirectional threaded rod. A first connecting block is threadedly connected to the outer side of the unidirectional threaded rod. A test bench is fixedly arranged at the top of the first connecting block. A limiting bar is fixedly arranged at the top of the test bench. Two sliders are fixedly arranged at the bottom of the test bench.

[0004] Chinese Patent with publication number CN114289351B discloses a power frequency withstand voltage retest tooling for transformers, including a first conveyor belt, a second conveyor belt and a test bench. A bent arm is installed on the side wall of the test bench through a driving mechanism. Two sliding grooves are symmetrically opened on the side of the bent arm facing the test bench. Two inclined plates are rotatably arranged in the two sliding grooves. The two inclined plates jointly rotatably support a fixed block at the ends away from the bent arm. An electric telescopic rod is installed on the fixed block. The output end of the electric telescopic rod is fixedly connected to a hollow push rod. A second electromagnet is installed in the hollow push rod.

[0005] To ensure the accuracy of the withstand voltage test results of current transformers, the current transformers need to operate under load continuously during the withstand voltage test. During this process, unqualified current transformers are prone to rapid temperature rise. Since the current current transformer withstand voltage testing device lacks the cooling ability for current transformers, the current transformers cannot be effectively cooled after the withstand voltage test, causing the internal components of the current transformers to continuously face the influence of high temperature, accelerating the aging loss of the components in the current transformers. At the same time, the current transformer withstand voltage testing device also lacks the fire extinguishing ability when the current transformer catches fire. When the current transformer accidentally catches fire, it is impossible to extinguish the current transformer in time and effectively, resulting in an increase in the safety risk during the withstand voltage test of the circuit transformer, posing a serious threat to the surrounding environment and personal safety.

[0006] Therefore, a withstand voltage testing device, its method, and its application in a current transformer are proposed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to disclose a withstand voltage testing device, its method, and its application in a current transformer to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: A withstand voltage testing device includes a conveying component, a bearing mechanism, a docking frame, a connecting seat, a pushing component, and a support box; The docking frame includes a fixed seat, on which a telescopic component is provided. The telescopic component includes a fixed part and a telescopic part. On one side of the fixed part and the telescopic part, a first hollow cylinder and a second hollow cylinder are respectively provided. A limiting plate is movably connected inside the first hollow cylinder and the second hollow cylinder, and a first electromagnetic plug and a second electromagnetic plug are respectively provided inside the first hollow cylinder and the second hollow cylinder; One end of the limiting plate is provided with an extension part. Inside the extension part, a connecting seat is provided. At the bottom of the connecting seat, a detection joint is provided. Inside the connecting seat, an elastic bag is provided. At the bottom of the elastic bag, an exhaust pipe is provided. A powder supply component is provided on the elastic bag; The bearing mechanism includes a bearing frame, on which a clamping component is provided. An infrared temperature sensor is provided on the clamping component. The bottom of the bearing frame is movably connected with a lifting component. A heat dissipation component is provided inside the bearing frame.

[0009] Optionally, the conveying component includes a first conveying frame and a second conveying frame. The upper surfaces of the first conveying frame and the second conveying frame are flush. Inside the first conveying frame and the second conveying frame, a conveyor belt is drivingly connected. The conveyor belt in the second conveying frame is flush with the upper surface of the second conveying frame. On the outside of the conveyor belt on the second conveying frame, a baffle is provided. The inner sides of the first conveying frame and the second conveying frame are mutually attached. The bearing mechanism is arranged inside the first conveying frame. On one side of the conveyor belt on the second conveying frame, a baffle is provided. The bottom of the docking frame is fixedly connected to the top of the support box.

[0010] Optionally, the telescopic component is located at one end of the fixed seat close to the first conveying frame. The extension part is located at one end of the limiting plate away from the fixed part. The limiting plate is in an "L" shape structure. Both the first electromagnetic plug and the second electromagnetic plug are used for locking and fixing the limiting plate. The inner side of the elastic bag is fixedly connected to one end of the telescopic part. The pushing component is arranged on the top of the support box and is located directly below the docking frame.

[0011] Optionally, a first control valve is provided on the exhaust pipe. The powder supply assembly includes a powder storage tank provided at the top of the elastic bag. The interior of the powder storage tank is provided with flame-retardant powder. A second control valve is provided at the bottom of the powder storage tank to control the communication between the powder storage tank and the elastic bag. When the second control valve is opened, the flame-retardant powder in the powder storage tank is introduced into the elastic bag. A one-way valve is provided on the elastic bag, and external gas enters the interior of the elastic bag through the one-way valve when the elastic bag is stretched.

[0012] Optionally, the clamping assembly includes a vertical plate. A cylinder is provided in the middle of the vertical plate. A clamping plate is provided at the telescopic end of the cylinder. The infrared temperature sensor is provided on the top of the clamping plate.

[0013] Optionally, the heat dissipation assembly includes an air suction hood and a heat dissipation plate. The heat dissipation plate is provided inside the bearing frame. The air suction hood is provided at the bottom of the bearing frame. A duct is provided at the bottom of the air suction hood. A fan is provided inside the duct. The middle section of the duct is an elastic tube.

[0014] Optionally, there are four lifting assemblies, and the four lifting assemblies are respectively located at the four edges of the lower surface of the bearing frame. The lifting assembly includes a ball joint cylinder, an electric telescopic rod and a rotating ball. The ball joint cylinder is fixedly connected to the lower surface of the bearing frame. A rotating ball is rotatably connected inside the ball joint cylinder. The telescopic end of the electric telescopic rod is fixedly connected to the rotating ball. The fixed end of the electric telescopic rod is provided on the top of the conveyor belt.

[0015] The present invention also provides a voltage withstand test method when the voltage withstand test device as described above is applied in the voltage withstand test of a current transformer, including the following steps: S1. Before the voltage withstand test of the current transformer, first place a plurality of current transformers to be tested on the bearing mechanism, and use the clamping assembly in the bearing mechanism to keep the current transformer stable; S2. Driven continuously by the conveying assembly, the current transformers are successively made to correspond to the docking frame. After the connecting seat is docked with the wiring part of the current transformer, a voltage withstand test is carried out on the current transformer; S3. During the voltage withstand test of the current transformer, the temperature of the current transformer is detected in real time through the infrared temperature sensor. When the temperature of the infrared temperature sensor exceeds the safe range, the heat dissipation assembly is used to cool down the current transformer; S4. The current transformers that pass the voltage withstand test are qualified products, and the current transformers that fail the test are transferred and centrally processed by the pushing assembly.

[0016] The technical effects and advantages of the present invention: 1. The present invention makes the wiring part of the current transformer dock with the detection joint through the lifting component, uses the test system for the withstand voltage test of the current transformer to test the withstand voltage ability of the current transformer, continuously detects the temperature of the current transformer by the infrared temperature sensor, and continuously reduces the temperature of the current transformer in time by using the heat dissipation component, so as to avoid the problem of serious loss due to excessive temperature after the withstand voltage test of the current transformer.

[0017] 2. In the present invention, the horizontal movement of the telescopic part in the telescopic component squeezes the elastic bag between the telescopic part and the connecting seat, and the elastic bag will generate a downward air flow, which cooperates with the heat dissipation component to improve the heat dissipation efficiency near the current transformer. When a fire occurs during the withstand voltage test of the current transformer, the powder supply component is used to introduce the flame retardant powder into the exhaust hood. Then, during the extrusion of the elastic bag, the downward air flow carries the flame retardant powder and sprays it onto the current transformer to cover the ignition point and extinguish the fire at the ignition point.

[0018] 3. After the unqualified current transformer is transferred, in the present invention, the air flow sucked downward by the fan continuously sucks the flame retardant powder on the heat dissipation plate downward. By adjusting the tilt angle and tilt direction of the heat dissipation plate through the change of multiple electric telescopic rods, under the combined action of gravity and the suction force of the fan on the flame retardant powder on the heat dissipation plate, the speed of the flame retardant powder moving downward is accelerated, and the cleaning efficiency of the flame retardant powder is improved to ensure that the subsequent current transformer remains horizontal when positioning and installing on the heat dissipation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the structure of the docking frame of the present invention; Figure 3 is the present invention Figure 1 schematic diagram of the partial structure in; Figure 4 is a schematic diagram of the structure of the bearing mechanism of the present invention; Figure 5 is a schematic diagram of the structure of the lifting component of the present invention.

[0020] In the figure: 1. Conveying component; 101. First conveying rack; 102. Second conveying rack; 103. Conveyor belt; 2. Loading mechanism; 201. Loading frame; 202. Heat dissipation plate; 203. Clamping component; 2031. Vertical plate; 2032. Cylinder; 2033. Clamping plate; 2034. Infrared temperature sensor; 204. Suction hood; 2041. Air duct; 2042. Fan; 2043. Elastic tube; 205. Lifting component; 2051. Ball joint cylinder; 2052. Electric telescopic rod; 2053. Rotating ball; 3. Docking rack; 301. Fixed seat; 302. Telescopic component; 3021. Fixed part; 3022. Telescopic part; 3023. Extension part; 3024. First hollow cylinder; 3025. Second hollow cylinder; 3026. Limiting plate; 4. Connecting seat; 401. Detection joint; 5. Elastic bag; 501. Exhaust pipe; 502. Powder storage tank; 6. Pushing component; 601. Electric push rod; 602. Pushing plate; 7. Support box. Detailed implementation mode

[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0023] Embodiment 1 Please refer to Figures 1-5The present embodiment discloses a pressure test device, including a transmission component 1, a bearing mechanism 2, a docking frame 3, a connecting seat 4, a push-up component 6 and a support box 7, wherein the docking frame 3 is fixedly connected to the top of the support box 7, and a detection joint 401 is provided at the bottom of the connecting seat 4, and the transmission component 1 includes a first transmission frame 101 and a second transmission frame 102, the upper surfaces of the first transmission frame 101 and the second transmission frame 102 are flush, the inner sides of the first transmission frame 101 and the second transmission frame 102 are in contact with each other, and the internal transmission of the first transmission frame 101 and the second transmission frame 102 is connected with a conveyor belt 103, the bearing mechanism 2 is provided inside the first transmission frame 101, and the second transmission frame The conveyor belt 103 in 102 is flush with the upper surface of the second conveyor rack 102. A baffle is provided on the second conveyor rack 102 on the outer side of the conveyor belt 103. The baffle is used to limit the current transformer on the second conveyor rack 102 to prevent the current transformer from falling from the second conveyor rack 102. A test system for the withstand voltage test of the current transformer is provided on the support box 7. The detection connector 401 of the connecting seat 4 is the wiring terminal of the test system. The test system for the withstand voltage test of the current transformer is a prior art and will not be elaborated herein. The current transformers that pass the test are transported on the first conveyor rack 101, and the unqualified current transformers are transported on the second conveyor rack 102.

[0024] Specifically, the docking frame 3 includes a fixed seat 301, and a telescopic assembly 302 is provided at one end of the fixed seat 301 close to the first conveying frame 101. The telescopic assembly 302 includes a fixed portion 3021 and a telescopic portion 3022. A first hollow cylinder 3024 and a second hollow cylinder 3025 are provided on one side of the fixed portion 3021 and the telescopic portion 3022, respectively. A first electromagnetic latch is provided inside the first hollow cylinder 3024, and a second electromagnetic latch is provided inside the second hollow cylinder 3025. The first electromagnetic latch and the second electromagnetic latch are both used to lock and fix the limit plate 3026. The first hollow cylinder 3024 and the second hollow cylinder 3025 are internally movably connected to the limit plate 3026. The limit plate 3026 is in an "L"-shaped structure, and an extension portion 3023 is provided at one end of the limit plate 3026 away from the fixed portion 3021. , the connecting seat 4 is arranged on the inner side of the extension part 3023, and an elastic bag 5 is arranged on the inner side of the connecting seat 4. An exhaust pipe 501 is arranged at the bottom of the elastic bag 5, and a first control valve is arranged on the exhaust pipe 501. The inner side of the elastic bag 5 is fixedly connected to one end of the telescopic part 3022. By locking the first electromagnetic latch in the first hollow cylinder 3024, the relative position of the extension part 3023 and the fixed part 3021 can be fixed. At this time, when the telescopic part 3022 is telescoped back and forth, the extension part 3023 is cooperated to squeeze and stretch the elastic bag 5. When the second electromagnetic latch in the second hollow cylinder 3025 is locked and the first electromagnetic latch in the first hollow cylinder 3024 is unlocked, the relative position of the telescopic part 3022 and the extension part 3023 is fixed. When the telescopic part 3022 moves horizontally, the extension part 3023 moves synchronously.

[0025] A pushing component 6 is provided on the support box 7. The pushing component 6 is located directly below the docking frame 3. After the withstand voltage test of the current transformer is completed, the current transformers that fail the withstand voltage test are pushed from the first conveyor 101 to the second conveyor 102 by the pushing component 6.

[0026] Specifically, the bearing mechanism 2 includes a bearing frame 201. A heat dissipation plate 202 is provided inside the bearing frame 201. Clamping components 203 are provided at the four corners of the bearing frame 201. The clamping component 203 includes a vertical plate 2031. A cylinder 2032 is provided in the middle of the vertical plate 2031. A clamping plate 2033 is provided at the telescopic end of the cylinder 2032. The current transformer is positioned by the clamping component 203. An infrared temperature sensor 2034 is provided at the top of the clamping plate 2033. A high temperature threshold is preset in the infrared temperature sensor 2034. The temperature and temperature distribution on the outer side of the current transformer are detected in real time by the infrared temperature sensor 2034.

[0027] An air suction hood 204 is provided at the bottom of the bearing frame 201. A duct 2041 is provided at the bottom of the air suction hood 204. A fan 2042 is provided inside the top of the duct 2041. A heat dissipation component for cooling the current transformer is constituted by the heat dissipation plate 202, the air suction hood 204, the duct 2041 and the fan 2042.

[0028] A lifting component 205 is provided at the bottom of the bearing frame 201. The middle section of the duct 2041 is an elastic tube 2043. There are four lifting components 205, and the four lifting components 205 are respectively located at the four edges of the lower surface of the bearing frame 201, and the four lifting components 205 are arranged in pairs.

[0029] During use, a plurality of bearing mechanisms 2 are provided on the conveyor belt 103 in the first conveyor rack 101. The clamping plates 2033 are driven by the air cylinders 2032 in the bearing mechanisms 2 to squeeze inward, clamping and positioning the current transformers. Driven by the conveyor belt 103, the current transformers are sequentially conveyed to directly below the connecting seat 4. Before the current transformers correspond to the position of the connecting seat 4, the upper surface of the bearing frame 201 is lower than the upper surface of the first conveyor rack 101. After each current transformer corresponds to the connecting seat 4, driven by the lifting assembly 205, the bearing frame 201 and the current transformer are synchronously lifted, so that the upper surface of the bearing frame 201 is higher than the upper surface of the first conveyor rack 101, and the wiring part for the withstand voltage test of the current transformer is in close contact with the detection joint 401 at the bottom of the connecting seat 4. By starting the test system for the withstand voltage test of the current transformer, it is detected whether the withstand voltage ability of the current transformer is normal. If the withstand voltage test of the current transformer is normal, the test system is powered off. At this time, the temperature of the current transformer is also lower than the preset high temperature threshold in the infrared temperature sensor 2034, and the internal components of the current transformer are not affected at this temperature. Then, the current transformer is driven to move downward by the lifting assembly 205, so that the detection joint 401 is separated from the wiring part for the withstand voltage test of the current transformer. The conveyor belt 103 continues to move forward, and the current transformer moves forward synchronously with the conveyor belt 103 under the clamping action of the clamping plates 2033, completing the separation of the wiring part of the current transformer from the detection joint 401, making the current transformer located at the rear correspond to the detection joint 401, and continuing the withstand voltage test after the docking is completed, thereby realizing the automatic withstand voltage test of the current transformer in this way.

[0030] When the current transformer wiring part contacts the detection joint 401, it is detected that the withstand voltage test of the current transformer is unqualified. Similarly, after the test result is displayed, the test system is powered off. At this time, the temperature measured by the temperature sensor reaches the preset high temperature threshold in the infrared temperature sensor 2034. In this regard, first, the first electromagnetic plug in the first hollow cylinder 3024 is locked, so that the relative position of the extension part 3023 and the fixed part 3021 is fixed. The second electromagnetic plug in the second hollow cylinder 3025 is disconnected. The fixed part 3021 of the telescopic assembly 302 drives the telescopic part 3022 to move horizontally repeatedly. During this process, the first control valve on the exhaust pipe 501 is opened. When the telescopic part 3022 approaches the elastic bag 5, it cooperates with the extension part 3023 to squeeze the elastic bag 5, so that the gas in the elastic bag 5 is discharged downward through the exhaust pipe 501. When the telescopic part 3022 moves away from the elastic bag 5, the telescopic part 3022 will stretch the elastic bag 5. The elastic bag 5 is provided with a one-way valve, and external gas enters the inside of the elastic bag 5 through the one-way valve and the exhaust pipe 501 when the elastic bag 5 is stretched, to supplement the gas in the elastic bag 5. With the repeated horizontal movement of the telescopic part 3022 in the telescopic assembly 302, the gas in the elastic bag 5 acts on the current transformer repeatedly. The air flow squeezed downward through the exhaust pipe 501 blows towards the current transformer, accelerating the heat exchange between the unqualified current transformer and the nearby air. At the same time, the fan 2042 is powered on and started, and the fan 2042 continuously sucks the gas downward, transporting the hot air near the current transformer outward, continuously reducing the temperature of the current transformer. According to the detection of the infrared temperature sensor 2034, when the temperature of the current transformer reaches the normal level, the fan 2042 is powered off and stopped. The lifting assembly 205 drives the current transformer to move downward, so that the upper surface of the bearing frame 201 is flush with the upper surface of the first conveyor rack 101. Then, the electric push rod 601 drives the push plate 602 to extend. When the push plate 602 contacts one side of the current transformer, the air cylinder 2032 drives the clamping plate 2033 to contract, releasing the limit of the clamping plate 2033 on the current transformer. So that the unqualified current transformer is pushed by the push plate 602 and transferred from the top of the first conveyor rack 101 to the top of the second conveyor rack 102. The conveyor belt 103 in the second conveyor rack 102 bears the unqualified current transformer and conveys the unqualified current transformer forward. At the same time, the electric push rod 601 drives the push plate 602 to contract and reset, and the lifting assembly 205 drives the bearing frame 201 to contract and reset. During the forward conveying process of the conveyor belt 103 in the first conveyor rack 101, the subsequent current transformers are tested corresponding to the detection joint 401.

[0031] Embodiment 2 Please refer to Figures 1-5As shown, during the test of unqualified current transformers, after the overall temperature of the current transformer exceeds the safety threshold, a local area with high temperature and high pressure will be formed inside the current transformer, which will increase the risk of equipment fire and pose a serious threat to the surrounding environment and personnel safety. The following embodiments are provided to solve this problem: A powder supply assembly is provided on the elastic bag 5. The powder supply assembly includes a powder storage tank 502 provided at the top of the elastic bag 5. The inside of the powder storage tank 502 is provided with flame retardant powder. A second control valve is provided at the bottom of the powder storage tank 502 to control the communication between the elastic bag 5 and the powder storage tank 502. When the second control valve is opened, the flame retardant powder in the powder storage tank 502 is introduced into the elastic bag 5. When the elastic bag 5 is not squeezed, the flame retardant powder in the elastic bag 5 will not be discharged downward through the exhaust pipe 501. When the elastic bag 5 is squeezed, the flame retardant powder in the elastic bag 5 is sprayed onto the current transformer through the exhaust pipe 501 and covers the surface of the current transformer, and the flame retardant powder is used to extinguish the flame on the current transformer.

[0032] The lifting assembly 205 includes a ball joint cylinder 2051, an electric telescopic rod 2052 and a rotating ball 2053. The ball joint cylinder 2051 is fixedly connected to the lower surface of the bearing frame 201. A rotating ball 2053 is rotatably connected inside the ball joint cylinder 2051. The telescopic end of the electric telescopic rod 2052 is fixedly connected to the rotating ball 2053. The fixed end of the electric telescopic rod 2052 is provided at the top of the conveyor belt 103. Through the cooperation of the electric telescopic rod 2052 and the rotating ball 2053 in the four lifting assemblies 205, the heat dissipation plate 202 and the current transformer are adjusted to present different inclination angles. Specifically, the ball joint cylinder 2051 and the rotating ball 2053 serve as the fulcrums for the bearing frame 201 and the electric telescopic rod 2052 to move and rotate. When the bearing frame 201 sinks and inclines to one side, the electric telescopic rod 2052 close to that side contracts and sinks downward, and the other electric telescopic rods 2052 synchronously make adaptive contractions. Under the action of the rotational cooperation between the rotating ball 2053 and the ball joint cylinder 2051, the inclination angle of the bearing frame 201 is maintained as the fulcrum.

[0033] In use, when the current transformer temperature detected by the infrared temperature sensor 2034 exceeds the preset high-temperature threshold, it indicates that the current transformer catches fire during the withstand voltage test. At this time, the test system is powered off, and the lifting assembly 205 drives the current transformer to move downward so that the upper surface of the bearing frame 201 is flush with the upper surface of the bearing frame 201. Then, according to the surface temperature of the current transformer detected by the infrared temperature sensor 2034, using the telescopic cooperation of the electric telescopic rod 2052 in the lifting assembly 205, the current transformer follows the heat dissipation plate 202 to present an inclined state, making the local fire area of the current transformer exactly correspond to the exhaust pipe 501. During this process, the second electromagnetic plug in the second hollow cylinder 3025 can be locked, and the first electromagnetic plug in the first hollow cylinder 3024 can be unlocked to fix the relative positions of the telescopic part 3022 and the extension part 3023. By synchronously moving the telescopic part 3022 and the extension part 3023 horizontally, the horizontal position of the exhaust pipe 501 can be adjusted to ensure that the exhaust pipe 501 exactly corresponds to the fire area. After the exhaust pipe 501 exactly corresponds to the fire area, the first electromagnetic plug in the first hollow cylinder 3024 is locked, and the second electromagnetic plug in the second hollow cylinder 3025 is unlocked. Then, by opening the second control valve, the flame retardant powder in the powder storage tank 502 is replenished into the elastic bag 5. Subsequently, the second control valve is closed, and the elastic bag 5 is repeatedly squeezed by the repeated horizontal movement of the telescopic part 3022 in the telescopic assembly 302. When the elastic bag 5 is squeezed, the flame retardant powder located in the elastic bag 5 is sprayed onto the fire area of the current transformer. When the elastic bag 5 is stretched, the first control valve at the bottom of the exhaust pipe 501 is closed to prevent the flame retardant powder sprayed downward from the exhaust pipe 501 from being re-sucked into the elastic bag 5, and external gas replenishes the elastic bag 5 through the one-way valve. By the way of fixed-point spraying of the flame retardant powder, the unnecessary consumption of the flame retardant powder can be reduced, and at the same time, the fire extinguishing efficiency of the fire area of the current transformer can be improved. During this process, it is judged whether the fire area of the current transformer is extinguished according to the infrared temperature sensor 2034. After it is determined that the flame of the fire area of the current transformer has been extinguished, the bearing frame 201 and the current transformer are kept horizontal through the cooperation of multiple electric telescopic rods 2052, and then moved upward until the bearing frame 201 is flush with the first conveyor rack 101. The push plate 602 is extended by the electric push rod 601, and the clamping plate 2033 releases the limit on the current transformer, and the fire-extinguished current transformer is transferred from the top of the first conveyor rack 101 to the top of the second conveyor rack 102.

[0034] However, after the flame retardant powder is sprayed onto the surface of the current transformer, some of the flame retardant powder will adhere to the upper surface of the heat dissipation plate 202. The accumulation of the flame retardant powder will cause the current transformer placed on the heat dissipation plate 202 subsequently to be prone to instability and tilt, which will further affect the stable docking of the wiring part of the current transformer with the detection joint 401 at the bottom of the connection seat 4. To solve this problem, the following embodiments are provided: After the unqualified current transformer is transferred from the first conveyor rack 101 to the top of the second conveyor rack 102, at this time, the push plate 602 is located directly above the bearing frame 201 and the heat dissipation plate 202, and there is a gap between the lower surface of the push plate 602 and the heat dissipation plate 202. At this time, by energizing and starting the fan 2042, the fan 2042 sucks the gas downward, and through the gap between the push plate 602 and the heat dissipation plate 202, the airflow generated by the fan 2042 acts more concentratedly on the flame retardant powder on the heat dissipation plate 202. Further, during this process, at the same time, multiple electric telescopic rods 2052 are used to adjust the inclination angle and inclination direction of the heat dissipation plate 202. When the heat dissipation plate 202 is in an inclined state, under the combined action of gravity and the suction force of the fan 2042 on the flame retardant powder on the heat dissipation plate 202, the speed of the flame retardant powder moving downward is accelerated, thereby reducing the residence time of the flame retardant powder on the heat dissipation plate 202, improving the cleaning efficiency of the flame retardant powder, and enabling the subsequent current transformer to be horizontal when positioned and installed on the heat dissipation plate 202.

[0035] Embodiment 3 This embodiment provides a usage method when the above-mentioned withstand voltage test device is applied to a current transformer, including the following steps: S1. Before the current transformer withstand voltage test, first place a plurality of current transformers to be tested on the bearing mechanism 2, and use the clamping assembly 203 in the bearing mechanism 2 to keep the current transformer stable.

[0036] S2. Driven continuously by the transfer assembly 1, the current transformers are successively made to correspond to the docking frame 3. After the connecting seat 4 is docked with the wiring part of the current transformer, a withstand voltage test is performed on the current transformer.

[0037] S3. During the current transformer withstand voltage test, the temperature of the current transformer is detected in real time by the infrared temperature sensor 2034. When the temperature of the infrared temperature sensor 2034 exceeds the safe range, the heat dissipation assembly is used to cool the current transformer.

[0038] S4. The current transformers that pass the withstand voltage test are qualified products, and the unqualified current transformers are transferred by the pushing assembly 6 for centralized processing.

[0039] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A pressure test device, comprising a transmission assembly (1), a bearing mechanism (2), a docking frame (3), a connecting seat (4), an ejection assembly (6) and a support box (7), characterized in that: The docking frame (3) comprises a fixed seat (301), a telescopic assembly (302) is provided on the fixed seat (301), the telescopic assembly (302) comprises a fixed portion (3021) and a telescopic portion (3022), a first hollow cylinder (3024) and a second hollow cylinder (3025) are provided on one side of the fixed portion (3021) and the telescopic portion (3022), the first hollow cylinder (3024) and the second hollow cylinder (3025) are internally movably connected to a limit plate (3026), and a first electromagnetic latch and a second electromagnetic latch are provided inside the first hollow cylinder (3024) and the second hollow cylinder (3025); An extension portion (3023) is provided at one end of the limiting plate (3026), a connecting seat (4) is provided on the inner side of the extending portion (3023), a detection connector (401) is provided at the bottom of the connecting seat (4), an elastic bag (5) is provided on the inner side of the connecting seat (4), an exhaust pipe (501) is provided at the bottom of the elastic bag (5), and a powder supply assembly is provided on the elastic bag (5); The bearing mechanism (2) comprises a bearing frame (201), a clamping assembly (203) is provided on the bearing frame (201), an infrared temperature sensor (2034) is provided on the clamping assembly (203), a lifting assembly (205) is movably connected to the bottom of the bearing frame (201), and a heat dissipation assembly is provided inside the bearing frame (201).

2. The withstand voltage test device according to claim 1, characterized in that: The conveying assembly (1) comprises a first conveying frame (101) and a second conveying frame (102); the upper surfaces of the first conveying frame (101) and the second conveying frame (102) are flush with each other; a conveyor belt (103) is internally connected to the first conveying frame (101) and the second conveying frame (102); the conveyor belt (103) in the second conveying frame (102) is flush with the upper surface of the second conveying frame (102); a baffle is provided on the outer side of the conveyor belt (103) on the second conveying frame (102); the inner sides of the first conveying frame (101) and the second conveying frame (102) are in contact with each other; the bearing mechanism (2) is arranged inside the first conveying frame (101); a baffle is provided on one side of the conveyor belt (103) on the second conveying frame (102); and the bottom of the docking frame (3) is fixedly connected to the top of the supporting box (7).

3. The withstand voltage test device according to claim 1, characterized in that: The telescopic assembly (302) is located at one end of the fixed seat (301) close to the first conveying frame (101), the extending portion (3023) is located at one end of the limiting plate (3026) away from the fixed portion (3021), the limiting plate (3026) is in an "L"-shaped structure, the first electromagnetic latch and the second electromagnetic latch are both used to lock and fix the limiting plate (3026), the inner side of the elastic bag (5) is fixedly connected to one end of the telescopic portion (3022), and the ejecting assembly (6) is arranged on the top of the supporting box (7), and the ejecting assembly (6) is located directly below the docking frame (3).

4. The withstand voltage test device according to claim 1, characterized in that: The exhaust pipe (501) is provided with a first control valve, the powder supply assembly comprises a powder storage tank (502) arranged on the top of the elastic bag (5), the powder storage tank (502) is provided with flame retardant powder inside, and a second control valve is provided at the bottom of the powder storage tank (502), and the communication between the powder storage tank (502) and the elastic bag (5) is controlled by the second control valve. When the second control valve is opened, the flame retardant powder in the powder storage tank (502) is introduced into the elastic bag (5), and a one-way valve is provided on the elastic bag (5), and external gas enters the elastic bag (5) through the one-way valve when the elastic bag (5) is stretched.

5. The withstand voltage test device according to claim 1, characterized in that: The clamping assembly (203) comprises a vertical plate (2031), a cylinder (2032) is provided in the middle of the vertical plate (2031), a clamping plate (2033) is provided at the telescopic end of the cylinder (2032), and the infrared temperature sensor (2034) is provided on the top of the clamping plate (2033).

6. The withstand voltage test device according to claim 1, characterized in that: The heat dissipation component comprises an air suction hood (204) and a heat dissipation plate (202); the heat dissipation plate (202) is arranged on the inner side of a carrying frame (201); the air suction hood (204) is arranged on the bottom of the carrying frame (201); an air guide tube (2041) is arranged on the bottom of the air suction hood (204); a fan (2042) is arranged on the inner side of the air guide tube (2041); and a middle section of the air guide tube (2041) is arranged as an elastic tube (2043).

7. The withstand voltage test device according to claim 1, characterized in that: Four lifting assemblies (205) are provided, and the four lifting assemblies (205) are respectively located at four edges of the lower surface of the carrying frame (201). The lifting assemblies (205) include a ball connection tube (2051), an electric telescopic rod (2052) and a rotating ball (2053). The ball connection tube (2051) is fixedly connected to the lower surface of the carrying frame (201), and the rotating ball (2053) is rotatably connected inside the ball connection tube (2051). The telescopic end of the electric telescopic rod (2052) is fixedly connected to the rotating ball (2053), and the fixed end of the electric telescopic rod (2052) is arranged on the top of the conveyor belt (103).

8. The withstand voltage test method of the withstand voltage test device according to claim 1, characterized in that: The following steps are involved: S1. Before performing a withstand voltage test on an electrical device, firstly, a plurality of electrical devices to be tested are placed on the support mechanism (2), and the clamping assembly (203) in the support mechanism (2) is used to keep the electrical devices stable; S2, under the continuous driving of the transmission component (1), the electrical equipment is sequentially aligned with the docking frame (3), and after the connection seat (4) is docked with the wiring part of the electrical equipment, a withstand voltage test is performed on the electrical equipment; S3. During the withstand voltage test of the electrical equipment, the temperature of the electrical equipment is detected in real time by using the infrared temperature sensor (2034). When the temperature of the infrared temperature sensor (2034) exceeds a safe range, the heat dissipation component is used to cool the electrical equipment; S4. Electrical equipment that passes the withstand voltage test is a qualified product, and electrical equipment that fails the test is transferred by the ejection assembly (6) for centralized processing.

9. Application of the voltage withstand test device according to any one of claims 1 to 7 in the voltage withstand test of a current transformer.

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