Automatic detection device for high-voltage insulation of product

Abstract

A product high-voltage insulation automatic detection device is characterized in that a movable plate is in sliding fit with a guide rail of a rack of a line production conveying line, the movable plate is provided with a fixed plate, the fixed plate is provided with a tested product, the movable plate is provided with a power socket and a signal socket which are respectively connected with a test port of the tested product, and the movable plate is provided with a first insulation box; the first insulation box is provided with a plurality of installation grooves, copper sheets are arranged in the grooves and correspondingly connected with a power source and a signal socket respectively, a proximity switch is arranged on a guide rail of the detection station, a plurality of cams corresponding to the copper sheets in position are installed on the guide rail through a support, each cam is connected with a test socket arranged on the support, and the detection station is provided with a jacking air cylinder. An insulating tray is arranged at the upper end of the jacking air cylinder, the rack is provided with a limiting mechanism and a proximity switch, the jacking air cylinder and the limiting mechanism are electrically connected with a control cabinet, and the control cabinet is provided with a PLC control system, a withstand voltage detector and an insulating resistance detector and is connected with a power supply test socket and a signal test socket through control cables.

Description

Technical Field

[0001] The utility model relates to the field of product performance testing, in particular to an automatic detection device for high-voltage insulation of a product. Background Art

[0002] High voltage (withstand voltage) testing is one of the most common safety tests. Through the withstand voltage tester, a high voltage of the same frequency (usually AC withstand voltage not exceeding 5000V, DC withstand voltage not exceeding 6000V) is applied between the power supply terminal and the exposed metal conductor of the tested electrical product to check whether the electrical product has insulation collapse and whether the product has sufficient insulation. The insulation resistance value is the most basic insulation indicator of electrical circuits. The insulation condition of electrical products is reflected by measuring the insulation resistance value of electrical products. Through the insulation resistance tester, a DC voltage (usually 500V or 2500V) is applied between the power supply terminal and the exposed metal conductor (safe ground) of the tested electrical product and its insulation resistance value is measured. The numerical value is used to judge whether the electrical appliance is partially or completely damp and dirty, as well as insulation breakdown and severe overheating and aging. This is a test to confirm the insulation performance of electrical products.

[0003] At present, the withstand voltage test and insulation resistance test of electrical products usually require the assistance of staff to manually connect the multiple connection wires of each test equipment to the test interfaces of the tested product before the test can be carried out. Since the withstand voltage test and insulation resistance test need to be carried out successively, the test equipment and wiring lines need to be replaced after one test is completed. However, there are many test ports and wiring, and the manual operation is slow, inefficient, and time-consuming, which affects the production rhythm. Especially in the detection of assembly line conveyor lines, low manual efficiency will seriously affect the automation productivity. Moreover, both tests are carried out under high voltage, and manual operation has safety hazards. To solve these problems, a safe and efficient product high-voltage insulation automatic detection device is needed. Summary of the invention

[0004] The purpose of the utility model is to provide a high-voltage insulation automatic detection device in view of the shortcomings of the prior art. The PLC control system is connected with a withstand voltage tester and an insulation resistance tester, and can automatically perform two performance tests. The tested product can be connected to the PLC control system for detection by moving the copper sheet on the plate and the cam on the bracket, thereby solving the problems of low efficiency of high voltage and insulation resistance detection and potential safety hazards in assembly line conveyor lines.

[0005] The purpose of the utility model is to adopt the following scheme to achieve: a product high-voltage insulation automatic detection device, including a flow conveyor line, and a plurality of mobile plates, the mobile plates are slidably matched on the guide rails of the frame of the flow conveyor line, the mobile plate is provided with a fixed plate, the fixed plate is used to install the product to be tested, the mobile plate is provided with a power socket and a signal socket, the power socket and the signal socket are respectively connected to the test port of the product to be tested, a first insulating box is provided on the mobile plate, the first insulating box is provided with a plurality of mounting grooves, each mounting groove is provided with a copper sheet, the copper sheet is respectively connected to the power socket and the signal socket, and a connection is provided on the guide rail of the detection station of the flow conveyor line A proximity switch is provided, and a plurality of cams corresponding to the positions of the copper sheets are installed on the guide rail through a bracket, and each cam is respectively connected to a power supply test socket and a signal test socket arranged on the bracket. A lifting cylinder is arranged at the lower end of the detection station, and an insulating tray is arranged at the upper end of the lifting cylinder. A limit mechanism driven by a driving cylinder is arranged at the front side of the detection station on the frame. The proximity switch, the lifting cylinder and the limit mechanism are electrically connected to a control cabinet. A PLC control system, a withstand voltage tester and an insulation resistance tester are arranged in the control cabinet. The PLC control system is electrically connected to the withstand voltage tester and the insulation resistance tester, and the PLC control system is respectively connected to the power supply test socket and the signal test socket through control cables.

[0006] Preferably, the lifting cylinder is installed on the detection station through a support seat, a magnetic ring is arranged at the lower end of the push rod of the lifting cylinder, a first magnetic switch and a second magnetic switch are arranged on the cylinder body of the lifting cylinder, and the first magnetic switch and the second magnetic switch are electrically connected to the PLC control system.

[0007] Preferably, the limiting mechanism includes a support arm and a blocking member, both ends of the support arm are fixedly connected to the frame of the detection station, a driving cylinder is installed in the middle of the support arm, a mounting seat is arranged at the upper end of the driving cylinder, and the blocking member is rotatably mounted on the mounting seat.

[0008] Preferably, a protective cover is provided on the detection station, a photoelectric sensor is provided between the protective cover and the frame of the assembly line, and the photoelectric sensor is electrically connected to the PLC control system.

[0009] Preferably, the control cable includes a signal test cable and a power test cable. The signal test cable is connected to a signal test socket via a signal connection aviation plug provided at the end, and the power test cable is connected to a power test socket via a power connection aviation plug provided at the end.

[0010] Preferably, the main control unit of the PLC control system is provided with an ascending control port and a descending control port for controlling the lifting cylinder, and a first relay and a second relay are respectively provided between the ascending control port, the descending control port and the lifting cylinder, the first relay is used to control the ascending of the push rod of the lifting cylinder, and the second relay is used to control the descending of the push rod of the lifting cylinder.

[0011] Preferably, the main control unit of the PLC control system is provided with a limit mechanism control port, and a third relay is provided between the limit mechanism control port and the limit mechanism.

[0012] Preferably, the main control unit of the PLC control system is provided with a high-voltage detector control port, an insulation resistance detector control port, a first detection port, a second detection port, and a third detection port, and a relay is set on the control line of each port to control on and off. The first detection port is used to control the detection between the power line and the signal line, the second detection port is used to control the detection between the power supply and the casing, and the third detection port is used to control the detection between the signal and the casing.

[0013] Preferably, the PLC control system and the withstand voltage tester and the insulation resistance tester are all transmitted via RS485 communication signals.

[0014] By adopting the above scheme, multiple copper sheets are arranged on the movable plate through the first insulating box, and the copper sheets are connected to the power socket and the signal socket accordingly. Multiple cams are arranged on the bracket and connected to the power test socket and the signal test socket via control cables. The positions of the cams and the copper sheets correspond to each other. When testing the product, the connection between the PLC control system and the product under test is completed by connecting the cams and the copper sheets. No manual wiring is required, which effectively improves the detection efficiency. By connecting the PLC control system with the withstand voltage tester and the insulation resistance tester, the withstand voltage performance and insulation resistance performance of the product can be automatically tested. There is no need to manually replace the detection equipment, thus avoiding the occurrence of safety accidents.

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of point A;

[0018] Figure 3 It is a front view of the utility model;

[0019] Figure 4This is a schematic diagram of the connection relationship between the voltage withstand tester, insulation resistance tester, and switching power supply and the mains power of the utility model;

[0020] Figure 5 This is a connection diagram of the PLC control system and the relay of the utility model. DETAILED DESCRIPTION

[0021] See also Figures 1 to 5, a product high-voltage insulation automatic detection device, including a flow conveyor line, and a plurality of mobile boards 2, and a control cabinet 12. The control cabinet 12 is provided with a PLC control system, a withstand voltage tester, and an insulation resistance tester. The PLC control system is electrically connected to the withstand voltage tester and the insulation resistance tester. The withstand voltage tester and the insulation resistance tester are electrically connected to the mains respectively. The PLC control system is connected to the mains through a switch power supply. The PLC control system and the withstand voltage tester and the insulation resistance tester are transmitted through RS485 communication signals. The mobile board 2 is slidably matched on the guide rail 7 of the frame 71 of the flow conveyor line. The mobile board 2 is provided with a fixed plate 19, and the fixed plate 19 is used to install the product 1 to be tested. The mobile board 2 is provided with a power socket 81 and a signal socket 8. The power socket 81 and the signal socket 8 are respectively connected to the test port of the product 1 to be tested. The mobile board 2 is provided with a first insulation box 92, and the first insulation box 92 is provided with a plurality of installation slots, and a copper sheet is provided in each installation slot, and the copper sheet is respectively connected to the power socket 81 and the signal socket 8. A proximity switch 11 is provided on the guide rail 7 of the detection station of the assembly line for detecting the position of the moving plate 2 on which the product to be tested is installed. When the moving plate 2 reaches the specified position, the proximity switch 11 transmits the information to the PLC control system; and a plurality of cams 9 corresponding to the position of the copper sheet are installed on the guide rail 7 through a bracket 17, and each cam 9 is respectively connected to a power test socket 18 and a signal test socket provided on the bracket 17. A lifting cylinder 3 is provided at the lower end of the detection station, and an insulating tray 33 is provided at the upper end of the lifting cylinder 3. The lifting cylinder 3 is installed on a support seat 13 located at the detection station through a mounting plate 5. A magnetic ring is provided at the lower end of the push rod of the lifting cylinder 3. A first magnetic switch 31 and a second magnetic switch 32 are provided on the cylinder body of the lifting cylinder 3. The first magnetic switch 31 and the second magnetic switch 32 are electrically connected to the PLC control system. The frame 71 is located at the front side of the detection station and is provided with a limit mechanism driven by a driving cylinder. The limit mechanism includes a support arm 6 and a blocking member 4. The two ends of the support arm 6 are fixedly connected to the frame 71 of the detection station. The driving cylinder is installed in the middle of the support arm 6. A mounting seat is provided at the upper end of the driving cylinder. The blocking member 4 can be rotatably installed on the mounting seat. When the moving plate 2 approaches the designated detection position, the driving cylinder of the limit mechanism is activated to rotate the blocking member 4 upward to prevent the moving plate 2 from moving excessively. Through the proximity switch 11 and the limit mechanism, it is ensured that the moving plate 2 stops steadily at the detection station, and that the cam corresponds to the position of the copper sheet for easy connection. The proximity switch 11, the lifting cylinder 3, and the limit mechanism are all electrically connected to the control cabinet 12.The PLC control system is connected to the power test socket 18 and the signal test socket respectively through control cables. The control cables include a signal test cable and a power test cable. The signal test cable is connected to the signal test socket through a signal connection aviation plug set at the end, and the power test cable is connected to the power test socket 18 through a power connection aviation plug set at the end.

[0022] A protective cover 10 is arranged on the detection station to prevent the staff from touching the detection mechanism during the test and causing electric shock, which may lead to safety accidents. A photoelectric sensor is arranged between the protective cover 10 and the frame 71 of the assembly line conveyor. The photoelectric sensor is electrically connected to the PLC control system. When the high-voltage insulation performance of the product under test is tested, the photoelectric sensor determines whether the protective cover is installed in place by collecting photoelectric information in the protective cover 10, thereby preventing the high voltage at the detection station from causing harm to the staff.

[0023] The main control unit of the PLC control system is provided with an ascending control port and a descending control port for controlling the jacking cylinder 3. A first relay K5 and a second relay K6 are respectively provided between the ascending control port, the descending control port and the jacking cylinder 3. The first relay K5 is used to control the ascending of the push rod of the jacking cylinder 3, and the second relay K6 is used to control the descending of the push rod of the jacking cylinder 3.

[0024] The main control unit of the PLC control system is provided with a limit mechanism control port, and a third relay K7 is provided between the limit mechanism control port and the limit mechanism. When the product under test is tested, the PLC control system controls the third relay K7 to close, and releases the movable plate 2 to enter the next process.

[0025] In this embodiment, the main control unit of the PLC control system is provided with a withstand voltage tester control port, an insulation resistance tester control port, a first detection port, a second detection port, and a third detection port. Relays are provided on the control lines of each port to control on and off. The first detection port is used to control the detection between the power line and the signal line, the second detection port is used to control the detection between the power supply and the housing, and the third detection port is used to control the detection between the signal and the housing. The relays provided in each port are specifically connected as follows: the fourth relay K13 and the fifth relay K12 are connected in parallel between the high voltage tester control port and the ground, the sixth relay K11 and the seventh relay K1 are connected in parallel between the insulation resistance tester control port and the ground, the eighth relay K2 and the ninth relay K8 are connected in parallel between the first detection port and the ground, the tenth relay K9 and the eleventh relay K3 are connected in parallel between the second detection port and the ground, and the twelfth relay K4 and the thirteenth relay K10 are connected in parallel between the third detection port and the ground. The moving contacts of the eighth relay K2 and the thirteenth relay K10 are connected in parallel, one end of which is connected to the signal connection aviation plug, and the other end is connected to the positive input terminal of the withstand voltage tester through the moving contact of the fourth relay K13 and the positive input terminal of the insulation resistance tester through the moving contact of the sixth relay K11; the moving contacts of the ninth relay K8 and the tenth relay K9 are connected in parallel, one end of the connection end is connected to the power connection aviation plug, and the other end is connected to the negative input terminal of the withstand voltage tester through the moving contact of the fifth relay K12 and the positive input terminal of the insulation resistance tester through the moving contact of the seventh relay K1 The moving contact of the twelfth relay K4 is connected to the negative input terminal of the insulation resistance tester; one end of the moving contact of the eleventh relay K3 is connected to the power supply connection aviation plug, and the other end is connected to the positive input terminal of the withstand voltage tester and the positive input terminal of the insulation resistance tester through the moving contacts of the fourth relay K13 and the sixth relay K11 respectively; one end of the moving contact of the twelfth relay K4 is connected to the power supply connection aviation plug, and the other end is connected to the negative input terminal of the withstand voltage tester and the negative input terminal of the insulation resistance tester through the moving contacts of the fifth relay K12 and the seventh relay K1 respectively.

[0026] When using the present embodiment, the movable plate 2 moves along with the assembly line. When the proximity switch 11 detects that the movable plate 2 arrives at the detection station, it transmits a signal to the PLC control system, and the blocking member 4 of the limit mechanism arranged in front of the detection station limits the movable plate 2, and the PLC control system controls the lifting cylinder 3 to rise through the first relay K5, driving the movable plate 2 to move up, and the cam on the detection station is connected to the copper sheet. When the first magnetic switch on the lifting cylinder 3 detects that the push rod moves up to the specified position, the push rod in place signal is transmitted to the PLC control system, completing the wiring of the control cabinet and the product under test. After completing the wiring, the test is carried out. First, the withstand voltage test is carried out. The PLC control system first controls the fourth relay K13 and the fifth relay K12 to be closed, and the sixth relay K11 and the seventh relay K1 are disconnected, so that the input end of the withstand voltage tester is connected, and then the tested product is tested according to the regulations. Step 1: The eighth relay K2 and the ninth relay K8 are closed, and the tenth relay K9, the eleventh relay K3, the twelfth relay K4, and the thirteenth relay K10 are disconnected to detect the withstand voltage performance between the power cord and the signal line of the product. The PLC control system sends a start detection instruction and a loaded voltage value to the withstand voltage tester through 485 communication. After the detection is completed, a stop detection instruction is sent to disconnect the eighth relay K2 and the ninth relay K8 to isolate the high voltage, and record the detection result one; Step 2: The tenth relay K9 and the eleventh relay K3 are closed, and the eighth relay K2, the ninth relay K3, the eighth relay K4, and the ninth relay K10 are disconnected. The electrical appliance K8, the twelfth relay K4, and the thirteenth relay K10 are disconnected, and the withstand voltage performance between the product power cord and the shell is tested. The PLC control system sends a start detection instruction and a loading voltage value to the withstand voltage tester through 485 communication. After the detection is completed, a stop detection instruction is sent to disconnect the tenth relay K9 and the eleventh relay K3 to isolate the high voltage, and record the second detection result; Step three: The twelfth relay K4 and the thirteenth relay K10 are closed, the eighth relay K2, the ninth relay K8, the tenth relay K9, and the eleventh relay K3 are disconnected, and the withstand voltage performance between the signal line and the shell is tested. The PLC control system sends a start detection instruction and a loading voltage value to the withstand voltage tester through 485 communication. After the detection is completed, a stop detection instruction is sent to close and disconnect the twelfth relay K4 and the thirteenth relay K10 to isolate the high voltage, and record the third detection result.Then, the insulation resistance test is performed. The PLC control system controls the sixth relay K11 and the seventh relay K1 to close, and the fourth relay K13 and the fifth relay K12 to disconnect, so that the input end of the insulation resistance tester is connected, and then the product under test is tested according to regulations. Step 1: The PLC control system controls the eighth relay K2 and the ninth relay K8 to close, and the tenth relay K9, the eleventh relay K3, the twelfth relay K4, and the thirteenth relay K10 to disconnect, and the insulation resistance performance between the product signal line and the power line is tested. The PLC control system sends a start detection instruction and a loading voltage value to the insulation resistance tester through 485 communication. After the detection is completed, the PLC control system sends an instruction to stop the detection, so that the eighth relay K2 and the ninth relay K8 are disconnected to isolate the high voltage, and the detection result four is recorded; Step 2: The tenth relay K9 and the eleventh relay K3 are closed, the eighth relay K2, the ninth relay K8 are disconnected to isolate the high voltage, and the detection result four is recorded. K8, the twelfth relay K4, and the thirteenth relay K10 are disconnected to detect the insulation resistance performance between the product power line and the shell. The PLC control system sends a start detection instruction and a loading voltage value to the insulation resistance tester through 485 communication. After the detection is completed, the PLC control system sends a stop detection instruction to disconnect the tenth relay K9 and the eleventh relay K3 to isolate the high voltage, and record the detection result five; Step three: the twelfth relay K4 and the thirteenth relay K10 are closed, the eighth relay K2, the ninth relay K8, the tenth relay K9, and the eleventh relay K3 are disconnected, and the insulation resistance performance between the signal line and the shell of the product is tested. The PLC control system sends a start detection instruction and a loading voltage value to the insulation resistance tester through 485 communication. After the detection is completed, a stop detection instruction is sent to disconnect the twelfth relay K4 and the thirteenth relay K10 to isolate the high voltage, and record the detection result six. After all the above test items are completed, the PLC control system controls the fourth relay K13, the fifth relay K12, the sixth relay K11, the seventh relay K1, the eighth relay K2, the ninth relay K8, the tenth relay K9, the eleventh relay K3, the twelfth relay K4, and the thirteenth relay K10 to be disconnected. During the test process, the host computer connected to the PLC control system reads and displays all test results in real time and stores the test data. After the storage is completed, the PLC control system controls the jacking cylinder 5 to descend through the second relay K6, and the copper sheet on the moving plate is separated from the cam. The PLC control system controls the blocking member 4 of the limit mechanism to descend through the third relay K7 to release the tooling plate to enter the next process. The high-voltage insulation test of this process is completed, waiting for the next product to be tested to enter, and repeat the above actions.

[0027] Compared with the prior art, the utility model controls the withstand voltage tester and the insulation resistance tester through the PLC control system to automatically detect the withstand voltage performance and insulation resistance performance of the product. The tested product can be connected to the PLC control system for detection by moving the copper sheet on the plate and the cam on the bracket. There is no need for manual equipment replacement and wiring, so the utility model is safe to use and has high detection efficiency.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A product high voltage insulation automatic detection device, comprising an assembly line and a plurality of movable plates (2), characterized in that: The movable plate (2) is slidably engaged on a guide rail (7) of a frame (71) of an assembly line conveyor. The movable plate (2) is provided with a fixed plate (19). The fixed plate (19) is used to install the product (1) under test. The movable plate (2) is provided with a power socket (81) and a signal socket (8). The power socket (81) and the signal socket (8) are respectively connected to the test port of the product (1) under test. A first insulating box (92) is provided on the movable plate (2). The first insulating box (92) is provided with a plurality of mounting grooves. A copper sheet is provided in each mounting groove. The copper sheet is respectively connected to the power socket (81) and the signal socket (8). A proximity switch (11) is provided on the guide rail (7) of the detection station of the assembly line conveyor. The guide rail (7) is connected to the test port of the product (1) under test through a bracket (17). A plurality of cams (9) corresponding to the positions of the copper sheets are installed, and each cam (9) is respectively connected to a power supply test socket (18) and a signal test socket arranged on a bracket (17); a lifting cylinder (3) is arranged at the lower end of the detection station, and an insulating tray (33) is arranged at the upper end of the lifting cylinder (3); a limit mechanism driven by a driving cylinder is arranged at the front side of the detection station on the frame (71); the proximity switch (11), the lifting cylinder (3), and the limit mechanism are electrically connected to a control cabinet (12); a PLC control system, a withstand voltage tester, and an insulation resistance tester are arranged on the control cabinet (12); the PLC control system is electrically connected to the withstand voltage tester and the insulation resistance tester; and the PLC control system is respectively connected to the power supply test socket (18) and the signal test socket through control cables.

2. The product high voltage insulation automatic detection device according to claim 1 is characterized in that: The lifting cylinder (3) is installed on the detection station via a support seat (13); a magnetic ring is arranged at the lower end of the push rod of the lifting cylinder (3); a first magnetic switch (31) and a second magnetic switch (32) are arranged on the cylinder body of the lifting cylinder (3); and the first magnetic switch (31) and the second magnetic switch (32) are electrically connected to a PLC control system.

3. The product high voltage insulation automatic detection device according to claim 1 is characterized in that: The limiting mechanism comprises a support arm (6) and a blocking member (4); both ends of the support arm (6) are fixedly connected to a frame (71) of the detection station; a driving cylinder is installed in the middle of the support arm (6); a mounting seat is provided at the upper end of the driving cylinder; and the blocking member (4) is rotatably mounted on the mounting seat.

4. The product high voltage insulation automatic detection device according to claim 1 is characterized in that: A protective cover (10) is arranged on the detection station, a photoelectric sensor is arranged between the protective cover (10) and the frame (71) of the assembly line, and the photoelectric sensor is electrically connected to the PLC control system.

5. The product high voltage insulation automatic detection device according to claim 1 is characterized in that: The control cable comprises a signal test cable and a power test cable. The signal test cable is connected to a signal test socket via a signal connection aviation plug provided at the end, and the power test cable is connected to a power test socket (18) via a power connection aviation plug provided at the end.

6. The product high voltage insulation automatic detection device according to claim 1 is characterized by: The main control unit of the PLC control system is provided with an ascending control port and a descending control port for controlling the jacking cylinder (3); a first relay (K5) and a second relay (K6) are respectively provided between the ascending control port, the descending control port and the jacking cylinder (3); the first relay (K5) is used to control the ascending of the push rod of the jacking cylinder (3); and the second relay (K6) is used to control the descending of the push rod of the jacking cylinder (3).

7. The product high voltage insulation automatic detection device according to claim 1 is characterized in that: The main control unit of the PLC control system is provided with a limit mechanism control port, and a third relay (K7) is provided between the limit mechanism control port and the limit mechanism.

8. The product high voltage insulation automatic detection device according to claim 1 is characterized by: The main control unit of the PLC control system is provided with a high-voltage detector control port, an insulation resistance detector control port, a first detection port, a second detection port, and a third detection port. Relays are provided on the control lines of each port to control on and off. The first detection port is used to control the detection between the power line and the signal line, the second detection port is used to control the detection between the power supply and the casing, and the third detection port is used to control the detection between the signal and the casing.

9. The product high voltage insulation automatic detection device according to claim 1 is characterized by: The PLC control system and the withstand voltage tester and the insulation resistance tester are all transmitted via RS485 communication signals.

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