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 in particular to a withstand voltage testing device and method thereof, and applications thereof in current transformers. Background Art

[0002] Current transformers are used in power systems to convert large currents into small currents in proportion for use in measurement, protection and other equipment. The insulation stability of current transformers during operation is a key factor in determining whether the equipment can operate normally and safely. In order to comply with safety standards and specifications for the production and use of power equipment, current transformers should be subjected to voltage withstand tests to verify whether they meet these standards.

[0003] A Chinese patent with announcement number CN220323527U discloses a fully automatic transformer insulation withstand voltage test device, including a base, a first hood is fixedly provided on the front end face of the base, a first motor is fixedly provided on the inner bottom of the first hood, a one-way threaded rod is fixedly provided on the output end of the first motor, a first connecting block is threadedly connected to the outer side of the one-way threaded rod, a test bench is fixedly provided on the top end of the first connecting block, a limit fence is fixedly provided on the top end of the test bench, and two sliders are fixedly provided on the bottom end of the test bench.

[0004] A Chinese patent with announcement number CN114289351B discloses a transformer power frequency withstand voltage retest tooling, including a first conveyor belt, a second conveyor belt and a test bench, a bending arm is installed on the side wall of the test bench through a driving mechanism, and two sliding grooves are symmetrically opened on the side of the bending arm facing the test bench, and inclined plates are rotatably arranged in the two sliding grooves, and the ends of the two inclined plates away from the bending arm are jointly rotatably supported by a fixed block, an electric telescopic rod is installed on the fixed block, and the output end of the electric telescopic rod is fixedly connected to a hollow push rod, and a second electromagnet is installed in the hollow push rod.

[0005] To ensure the accuracy of the current transformer withstand voltage test results, the current transformer withstand voltage test needs to be continuously operated under load. During this process, unqualified current transformers are prone to rapid temperature increases. Since the current current transformer withstand voltage test device lacks the ability to cool the current transformer, the current transformer cannot effectively dissipate heat after the withstand voltage test, causing the internal components of the current transformer to continue to face high temperature effects, accelerating the aging and loss of components in the current transformer. At the same time, the current transformer withstand voltage test device also lacks the ability to extinguish fire when the current transformer catches fire. When the current transformer accidentally catches fire, the current transformer cannot be effectively extinguished in time, resulting in increased safety risks during the circuit transformer withstand voltage test, posing a serious threat to the surrounding environment and personnel safety.

[0006] Therefore, a withstand voltage test device and method thereof, and application of the device 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 test device and method thereof, and application of the device in a current transformer, so as to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pressure test device, including a transmission component, a bearing mechanism, a docking frame, a connecting seat, an ejection component and a support box; The docking frame comprises a fixed seat, a telescopic assembly is arranged on the fixed seat, the telescopic assembly comprises a fixed part and a telescopic part, a first hollow cylinder and a second hollow cylinder are respectively arranged on one side of the fixed part and the telescopic part, the first hollow cylinder and the second hollow cylinder are internally movably connected to a limit plate, and a first electromagnetic latch and a second electromagnetic latch are respectively arranged inside the first hollow cylinder and the second hollow cylinder; An extension portion is provided at one end of the limit plate, a connecting seat is provided inside the extension portion, a detection joint is provided at the bottom of the connecting seat, an elastic bag is provided inside the connecting seat, an exhaust pipe is provided at the bottom of the elastic bag, and a powder supply assembly is provided on the elastic bag; The bearing mechanism comprises a bearing frame, a clamping assembly is arranged on the bearing frame, an infrared temperature sensor is arranged on the clamping assembly, a lifting assembly is movably connected to the bottom of the bearing frame, and a heat dissipation assembly is arranged inside the bearing frame.

[0009] Optionally, the conveying assembly 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, the first conveying frame and the second conveying frame are internally connected with a conveyor belt, the conveyor belt in the second conveying frame is flush with the upper surface of the second conveying frame, a baffle is provided on the outer side of the conveyor belt on the second conveying frame, the inner sides of the first conveying frame and the second conveying frame are in contact with each other, the bearing mechanism is arranged inside the first conveying frame, a baffle is provided on one side of the conveyor belt on the second conveying frame, and the bottom of the docking frame is fixedly connected to the top of the support box.

[0010] Optionally, the telescopic assembly is located at one end of the fixed seat close to the first conveying frame, the extension portion is located at one end of the limit plate away from the fixed portion, the limit plate is an L-shaped structure, the first electromagnetic latch and the second electromagnetic latch are both used to lock and fix the limit plate, the inner side of the elastic bag is fixedly connected to one end of the telescopic portion, the ejection assembly is arranged on the top of the support box, and the ejection assembly is located directly below the docking frame.

[0011] Optionally, a first control valve is provided on the exhaust pipe, and the powder supply assembly includes a powder storage tank arranged on the top of the elastic bag, and flame retardant powder is provided inside the powder storage tank. A second control valve is provided at the bottom of the powder storage tank, and the connection between the powder storage tank and the elastic bag is controlled by the second control valve. 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, and 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 arranged on the inner side of the carrying frame, the air suction hood is arranged on the bottom of the carrying frame, an air duct is arranged at the bottom of the air suction hood, a fan is arranged on the inner side of the air duct, and the middle section of the air duct is arranged as an elastic tube.

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

[0015] The present invention also provides a withstand voltage test method when the withstand voltage test device as described above is used in a withstand voltage test of a current transformer, comprising the following steps: S1. Before the current transformer withstand voltage test, firstly 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. Under the continuous driving of the transmission assembly, the current transformer is sequentially aligned with the docking frame, and after the connection seat is docked with the connection part of the current transformer, a withstand voltage test is performed on the current transformer; S3. During the current transformer withstand voltage test, the temperature of the current transformer is detected in real time by an infrared temperature sensor. When the temperature of the infrared temperature sensor exceeds the safe range, the heat dissipation component is used to cool the current transformer; S4. Current transformers that pass the withstand voltage test are qualified products, and current transformers that fail the test are transferred by the push-pull assembly for centralized processing.

[0016] Technical effects and advantages of the present invention: 1. The present invention connects the wiring part of the current transformer with the detection connector through a lifting component, uses a current transformer withstand voltage test system to test the withstand voltage capability of the current transformer, uses an infrared temperature sensor to continuously detect the temperature of the current transformer, and uses a heat dissipation component to continuously reduce the temperature of the current transformer in time to avoid the problem of severe loss due to excessive temperature after the current transformer withstand voltage test.

[0017] 2. In the present invention, the horizontal movement of the telescopic part in the telescopic assembly squeezes the elastic bag between the telescopic part and the connecting seat. The elastic bag will generate a downward airflow, and cooperate with the heat dissipation component to improve the heat dissipation efficiency of the heat near the current transformer. When the current transformer catches fire during the withstand voltage test, the powder supply component is used to introduce the flame retardant powder into the exhaust hood. Then, during the squeezing process of the elastic bag, the downward airflow carries the flame retardant powder and sprays it onto the current transformer, covering the fire point and extinguishing the fire at the fire point.

[0018] 3. After the unqualified current transformer is transferred, the present invention uses the airflow attracted downward by the fan to continuously attract the flame retardant powder on the heat sink downward, and uses multiple electric telescopic rods to adjust the inclination angle and inclination direction of the heat sink, so that the flame retardant powder on the heat sink is accelerated to move to a lower place under the combined action of gravity and the suction force of the fan, thereby improving the removal efficiency of the flame retardant powder and ensuring that the subsequent current transformer remains horizontal when positioned and installed on the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the docking frame structure of the present invention; Figure 3 For the present invention Figure 1 Schematic diagram of the local structure; Figure 4 It is a schematic diagram of the bearing mechanism structure of the present invention; Figure 5 It is a schematic diagram of the lifting assembly structure of the present invention.

[0020] In the figure: 1. conveying assembly; 101. first conveying frame; 102. second conveying frame; 103. conveyor belt; 2. carrying mechanism; 201. carrying frame; 202. heat sink; 203. clamping assembly; 2031. vertical plate; 2032. cylinder; 2033. clamping plate; 2034. infrared temperature sensor; 204. air suction hood; 2041. air guide tube; 2042. fan; 2043. elastic tube; 205. lifting assembly; 2051. ball joint; 2052 , electric telescopic rod; 2053, rotating ball; 3, docking frame; 301, fixed seat; 302, telescopic assembly; 3021, fixed part; 3022, telescopic part; 3023, extension part; 3024, first hollow cylinder; 3025, second hollow cylinder; 3026, limit plate; 4, connecting seat; 401, detection joint; 5, elastic bag; 501, exhaust pipe; 502, powder storage tank; 6, push-up assembly; 601, electric push rod; 602, push plate; 7, support box. DETAILED DESCRIPTION

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

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0023] Embodiment 1 See also Figure 1-Figure 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 conveyed on the first conveyor rack 101, and the unqualified current transformers are conveyed 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 telescopic part 3022 and the extension part 3023 are fixed in relative position. When the telescopic part 3022 moves horizontally, the extension part 3023 moves synchronously.

[0025] The support box 7 is provided with a push-up assembly 6 , which is located directly below the docking rack 3 . After the withstand voltage test of the current transformer is completed, the current transformer that fails the withstand voltage test is pushed from the first conveying rack 101 to the second conveying rack 102 by the push-up assembly 6 .

[0026] Specifically, the supporting mechanism 2 includes a supporting frame 201, a heat sink 202 is provided on the inner side of the supporting frame 201, a clamping assembly 203 is provided at the four corners of the supporting frame 201, the clamping assembly 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 clamping assembly 203 is used to position the current transformer, an infrared temperature sensor 2034 is provided on the top of the clamping plate 2033, a high temperature threshold is preset in the infrared temperature sensor 2034, and the temperature and temperature distribution of the outside of the current transformer are detected in real time through the infrared temperature sensor 2034.

[0027] An air suction hood 204 is provided at the bottom of the supporting frame 201, an air duct 2041 is provided at the bottom of the air suction hood 204, and a fan 2042 is provided on the inner side of the top of the air duct 2041. The heat dissipation plate 202, the air suction hood 204, the air duct 2041 and the fan 2042 constitute a heat dissipation component for cooling the current transformer.

[0028] A lifting assembly 205 is provided at the bottom of the carrying frame 201 , the middle section of the air guide tube 2041 is provided as an elastic tube 2043 , four lifting assemblies 205 are provided, and the four lifting assemblies 205 are respectively located at the four edges of the lower surface of the carrying frame 201 , and the four lifting assemblies 205 are arranged in pairs.

[0029] When in use, a plurality of bearing mechanisms 2 are provided on the conveyor belt 103 in the first conveyor frame 101, and the cylinder 2032 in the bearing mechanism 2 drives the clamping plate 2033 to squeeze inward to clamp and position the current transformer. Driven by the conveyor belt 103, the current transformer is sequentially transported to the bottom of the connecting seat 4. Before the current transformer corresponds 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 frame 101. After each current transformer corresponds to the connecting seat 4, the lifting component 205 is used to drive the bearing frame 201 and the current transformer to move up synchronously, so that the upper surface of the bearing frame 201 is higher than the upper surface of the first conveyor frame 101, and the wiring part of the current transformer withstand voltage test is tightly in contact with the detection connector 401 at the bottom of the connecting seat 4, and the current transformer withstand voltage test is started. The test system detects whether the withstand voltage capability 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 high temperature threshold preset in the infrared temperature sensor 2034. At this temperature, the internal components of the current transformer are not affected. Then, the current transformer is driven downward by the lifting component 205 to separate the detection connector 401 from the wiring part of the withstand voltage test of the current transformer. The conveyor belt 103 continues to be transported forward. The current transformer moves forward synchronously with the conveyor belt 103 under the clamping action of the clamping plate 2033, and the separation of the wiring part of the current transformer and the detection connector 401 is completed, so that the current transformer located at the rear side corresponds to the detection connector 401. After the docking is completed, the withstand voltage test is continued. In this way, the automated withstand voltage test of the current transformer is realized.

[0030] When the current transformer wiring part contacts the detection joint 401, it is detected that the current transformer withstand voltage test fails. Similarly, after the test result is displayed, the test system is powered off. At this time, the temperature tested by the temperature sensor reaches the high temperature threshold preset in the infrared temperature sensor 2034. In this regard, the first electromagnetic latch 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, and the second electromagnetic latch in the second hollow cylinder 3025 is disconnected. The fixed part 3021 of the telescopic assembly 302 repeatedly drives the telescopic part 3022 to move horizontally. In this process, the first control valve on the exhaust pipe 501 is opened, and the telescopic part 3022 is moved horizontally. When the telescopic portion 3022 approaches the elastic bag 5, the extension portion 3023 cooperates 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 portion 3022 moves away from the elastic bag 5, the telescopic portion 3022 stretches the elastic bag 5. A one-way valve is provided on the elastic bag 5. When the elastic bag 5 is stretched, the external gas enters the elastic bag 5 through the one-way valve and the exhaust pipe 501 to replenish the gas in the elastic bag 5. With the repeated horizontal movement of the telescopic portion 3022 in the telescopic assembly 302, the gas in the elastic bag 5 repeatedly acts downward on the current transformer, and the airflow squeezed downward through the exhaust pipe 501 blows toward the current transformer. The fan 2042 is powered on to start the heat exchange between the unqualified current transformer and the nearby air. At the same time, the fan 2042 continuously draws the gas downward to transport the hot air near the current transformer outward to continuously reduce the temperature of the current transformer. According to the detection of the infrared temperature sensor 2034, when the temperature of the current transformer reaches a 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 carrier frame 201 is flush with the upper surface of the first conveying 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 cylinder 2032 drives the clamp 2033 to retract, releasing the limit of the current transformer by the clamp 2033, so that the unqualified current transformer is transferred from the top of the first conveyor rack 101 to the top of the second conveyor rack 102 under the push of the push plate 602, and the conveyor belt 103 in the second conveyor rack 102 carries the unqualified current transformer and transports it forward. At the same time, the electric push rod 601 drives the push plate 602 to retract and reset, and the lifting assembly 205 drives the carrying frame 201 to retract and reset. During the forward transportation of the conveyor belt 103 in the first conveyor rack 101, the subsequent current transformers are tested corresponding to the detection connector 401.

[0031] Embodiment 2 See also Figure 1-Figure 5As shown, during the test of unqualified current transformers, after the overall temperature of the current transformer exceeds the safety threshold, a local area of ​​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, and the powder supply assembly includes a powder storage tank 502 arranged on the top of the elastic bag 5, and flame retardant powder is provided inside the powder storage tank 502. A second control valve is provided at the bottom of the powder storage tank 502, and the connection between the elastic bag 5 and the powder storage tank 502 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. 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 toward the current transformer through the exhaust pipe 501 and covers the surface of the current transformer, and the flame on the current transformer is extinguished by the flame retardant powder.

[0032] The lifting assembly 205 includes a ball joint 2051, an electric telescopic rod 2052 and a rotating ball 2053. The ball joint 2051 is fixedly connected to the lower surface of the carrier frame 201. The rotating ball 2053 is rotatably connected inside the ball joint 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 arranged on the top of the conveyor belt 103. The electric telescopic rod 2052 and the rotating ball 2053 in the four lifting assemblies 205 cooperate to adjust the lifting position. The heat sink 202 and the current transformer present different tilt angles. Specifically, the ball joint 2051 and the rotating ball 2053 serve as fulcrums for the movable rotation of the supporting frame 201 and the electric telescopic rod 2052. When the supporting frame 201 sinks and tilts to one side, the electric telescopic rod 2052 close to that side shrinks and sinks downward, and the remaining electric telescopic rods 2052 shrink adaptively at the same time, and under the action of the rotating ball 2053 and the ball joint 2051 rotating in coordination, they serve as fulcrums to maintain the tilt angle of the supporting frame 201.

[0033] During use, when the infrared temperature sensor 2034 detects that the temperature of the current transformer exceeds the preset high temperature threshold, it indicates that the current transformer has caught fire during the withstand voltage test. At this time, the test system is powered off, and the lifting component 205 drives the current transformer to move downward so that the upper surface of the carrier frame 201 is flush with the upper surface of the carrier frame 201. Then, according to the surface temperature of the current transformer detected by the infrared temperature sensor 2034, the electric telescopic rod 2052 in the lifting component 205 is telescopically coordinated to make the current transformer follow the heat sink 202 and present an inclined state, so that the local fire area of ​​the current transformer is aligned with the exhaust gas. During this process, the second electromagnetic latch in the second hollow cylinder 3025 can be locked, and the first electromagnetic latch in the first hollow cylinder 3024 can be unlocked, so that the relative position of the telescopic part 3022 and the extension part 3023 is fixed, and the horizontal position of the exhaust pipe 501 is adjusted by synchronous horizontal movement of the telescopic part 3022 and the extension part 3023 to ensure that the exhaust pipe 501 is in correspondence with the fire area. After the exhaust pipe 501 is in correspondence with the fire area, the first electromagnetic latch in the first hollow cylinder 3024 is locked, and the second electromagnetic latch in the second hollow cylinder 3025 is unlocked, and then the second electromagnetic latch in the second hollow cylinder 3025 is locked. The second control valve is opened to add the flame retardant powder in the powder storage tank 502 into the elastic bag 5, and then the second control valve is closed. The elastic bag 5 is repeatedly squeezed by repeatedly moving the telescopic part 3022 in the telescopic assembly 302 horizontally. When the elastic bag 5 is squeezed, the flame retardant powder in the elastic bag 5 is sprayed toward 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-absorbed into the elastic bag 5. External gas is replenished into the elastic bag 5 through the one-way valve. The unnecessary consumption of flame retardant powder is reduced by spraying the flame retardant powder at fixed points. Improve the fire extinguishing efficiency in the fire area of ​​the current transformer. In this process, determine whether the fire area of ​​the current transformer is extinguished based on the infrared temperature sensor 2034. After determining that the flames in the fire area of ​​the current transformer are extinguished, the support frame 201 and the current transformer are kept horizontal through the cooperation of multiple electric telescopic rods 2052, and then move upward until the support frame 201 is flush with the first conveying 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 current transformer after the fire is extinguished is transferred from the top of the first conveying rack 101 to the top of the second conveying rack 102.

[0034] However, after the flame retardant powder is sprayed onto the surface of the current transformer, part of the flame retardant powder will adhere to the upper surface of the heat sink 202. The aggregation of the flame retardant powder will cause the current transformer subsequently placed on the heat sink 202 to be easily unstable and tilted, thereby affecting the stable docking of the current transformer wiring part with the detection connector 401 at the bottom of the connection seat 4. In this regard, the following embodiments are provided to solve the problem: After the unqualified current transformer is transferred from the first conveyor rack 101 to the top of the second conveyor rack 102, the push plate 602 is located directly above the carrier frame 201 and the heat sink 202, and there is a gap between the lower surface of the push plate 602 and the heat sink 202. At this time, the fan 2042 is powered on to start the fan 2042, so that the fan 2042 draws the gas downward, and the airflow generated by the fan 2042 acts more concentratedly on the flame retardant powder on the heat sink 202 through the gap between the push plate 602 and the heat sink 202, thereby In this process, multiple electric telescopic rods 2052 are used to adjust the inclination angle and inclination direction of the heat sink 202 at the same time. When the heat sink 202 is in an inclined state, the flame retardant powder on the heat sink 202 is accelerated to move to a lower place under the combined action of gravity and the attraction of the fan 2042, thereby reducing the residence time of the flame retardant powder on the heat sink 202, improving the removal efficiency of the flame retardant powder, and allowing the subsequent current transformer to remain horizontal when positioned and installed on the heat sink 202.

[0035] Embodiment 3 This embodiment provides a method for using the above withstand voltage test device when it is applied in a current transformer, comprising the following steps: S1. Before the current transformer withstand voltage test, a plurality of current transformers to be tested are first placed on the support mechanism 2, and the clamping components 203 in the support mechanism 2 are used to keep the current transformers stable.

[0036] S2. Under the continuous driving of the transmission component 1, the current transformer is sequentially made to correspond to the docking frame 3. After the connection seat 4 is docked with the connection 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 a safe range, the heat dissipation component is used to cool the current transformer.

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

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also 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 ejection assembly (6) is arranged on the top of the support box (7), and the ejection 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. A withstand voltage test method, the method utilizing the withstand voltage test device according to claim 1 to implement the withstand voltage test of a current transformer, 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.

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