An integrated testing device for a relay protection device

Abstract

This invention discloses an integrated testing device for relay protection equipment, belonging to the field of relay performance testing equipment. The invention includes a main body with a testing instrument mounted on top for electrical testing, a testing chamber with a drawer structure in the middle for negative pressure airtightness testing, and a positive pressure treatment chamber on top for tracer gas pretreatment. The invention first tests the electrical performance of the relay using the testing instrument. Then, relays that pass the test are placed in the positive pressure treatment chamber for a period of time, removed, and left to stand in the environment for a period before being placed back into the drawer structure for negative pressure testing. The positive pressure treatment facilitates the injection of tracer gas into damaged relays. When a relay filled with tracer gas is placed in the drawer structure for negative pressure testing, the presence of tracer gas indicates a damaged relay; conversely, if the negative pressure test fails to detect tracer gas, the relay is intact.

Description

Technical Field

[0001] This invention relates to the field of relay performance testing equipment, and in particular to an integrated testing device for relay protection equipment. Background Technology

[0002] As a core actuator and signal conversion component in relay protection systems and industrial automation control circuits, the reliability, accuracy, and sealing performance of relays directly affect the safe and stable operation of the entire system. Therefore, a series of rigorous performance tests must be performed on relays before equipment leaves the factory, during installation and commissioning, and during regular maintenance.

[0003] Traditional testing methods include: measuring coil parameters using a multimeter or dedicated coil resistance tester; manually testing its operation / return value using an adjustable DC power supply with a voltmeter and ammeter; checking contact resistance using a continuity tester; and for relays with sealing requirements (such as sealed relays used in harsh environments), airtightness is a critical indicator. However, conventional electrical performance testing equipment does not have airtightness testing capabilities. Airtightness testing requires the use of a dedicated negative pressure leak detector.

[0004] However, existing testing equipment has limited and scattered testing functions, making it impossible to complete all the above-mentioned testing items, including negative pressure leak detection and contact resistance, with a single device. Summary of the Invention

[0005] This invention provides an integrated testing device for relay protection equipment, which can solve the problem that existing technologies cannot use a single device to complete all the above-mentioned testing items, including negative pressure leak detection and contact resistance.

[0006] An integrated testing device for relay protection equipment includes a main body with a detection cavity inside. The main body also has a mounting cavity one and a mounting cavity two located above and below the detection cavity, respectively. A tester is mounted on the top of the main body. The tester includes a housing and a detection circuit disposed inside the housing. The housing has multiple sockets for inserting pins of the relay under test, and the electrical contacts of the sockets are all connected to the detection circuit. Drawer slides are mounted on opposite side walls of the detection cavity, and the device also includes a drawer structure. The drawer slides have a fixed rail and a movable rail. The rails are respectively installed on the detection chamber and the drawer structure; the drawer structure is provided with several negative pressure detection cylinders, and the second installation chamber is provided with a drive mechanism to drive the negative pressure detection cylinders to move up and down. The top of the detection chamber is provided with several sealed air inlet and outlet structures that cooperate with the negative pressure detection cylinders one by one. A gas sensor connected to the detection circuit is installed in the sealed air inlet and outlet structure; the sealed air inlet and outlet structure is connected to a negative pressure pump; the top of the main body of the equipment is also installed with a positive pressure processing box. During processing, the positive pressure processing box introduces tracer gas and pressurizes it to at least 1.2 standard atmospheres.

[0007] Furthermore, the housing is also equipped with a display screen and a main test button electrically connected to the detection circuit; the control circuit is based on a microcontroller and integrates a pin scanning and recognition circuit, a programmable linear power drive circuit, a high-precision signal measurement circuit, and a contact impedance measurement circuit; the control circuit pre-stores the typical resistance range and operating voltage range of common relay coils. The testing steps are as follows: After inserting the relay into any socket, operate the main test button one, and the instrument will automatically perform the full-process test; first, the relay type is identified by pin scanning, and then a driving voltage that gradually increases from 0V is automatically applied until the relay is energized, the energizing voltage is recorded and held; then the status of all contacts is detected; finally, the voltage is reduced until the relay is released, and the release voltage is recorded; the results of the entire process are displayed on the display within a few seconds.

[0008] Furthermore, a negative pressure pipeline system is provided inside the installation cavity, and the sealed air inlet and outlet structure includes an opening in the top side wall of the detection cavity. The negative pressure pipeline system and the opening are connected by a branch pipe, and a solenoid valve connected to the microcontroller is provided on the branch pipe. A status indicator light that cooperates with the negative pressure detection cylinder is also installed on the housing.

[0009] Furthermore, a sleeve is provided on the top side of the detection cavity located at the opening, which guides and cooperates with the end of the negative pressure detection cylinder. The end of the negative pressure detection cylinder is inserted into the sleeve. A convex ring is provided on the inner wall of the sleeve. A sealing ring is provided on one side of the convex ring, which abuts against the end face of the negative pressure detection cylinder. A bracket is provided inside the convex ring, and the gas sensor is mounted on the bracket.

[0010] Furthermore, the driving mechanism includes a telescopic cylinder vertically mounted on the bottom side of the second mounting cavity. The top of the telescopic cylinder is connected to a movable frame, and a guide telescopic sleeve rod is connected between the movable frame and the bottom side of the second mounting cavity. The top of the movable frame is connected to a top rod that penetrates the top of the second mounting cavity and extends into the detection cavity. An opening is opened on one side of the detection cavity, and a drawer structure is installed at the opening. The drawer structure includes an end plate with a handle, and a box with an open top is connected to one side of the end plate. A guide sleeve is fixed on the box, and the negative pressure detection cylinder is placed inside the guide sleeve. A through hole for the top rod is opened on the bottom side of the box located at the guide sleeve.

[0011] Furthermore, an equipment cavity is provided inside the main body of the equipment located directly below the second mounting cavity, and the negative pressure pump is installed inside the equipment cavity; a high-pressure gas storage tank is also fixed inside the equipment cavity, and the high-pressure gas storage tank stores tracer gas.

[0012] Furthermore, the positive pressure treatment box contains multiple independent positive pressure treatment chambers. The top of each positive pressure treatment chamber is provided with a stepped portion, and the stepped portion is fitted with a top cover. An air inlet pipe is connected to the bottom or side wall of each positive pressure treatment chamber. The air inlet pipe is connected to a distribution valve, and the distribution valve is connected to a high-pressure gas storage tank.

[0013] Furthermore, a U-shaped handle is provided on the top of the top cover; a fixing structure for fastening the top cover is also provided, the fixing structure including a horizontal beam placed above the top cover, the two ends of the beam being connected to two opposite outer walls of the positive pressure treatment box respectively; the bottom side of the beam is provided with several grooves, and a movable column that slides along the inner wall of the groove is connected by a spring in the groove, the movable column abutting against the upper surface of the top cover, and the end face of the movable column is a smooth surface.

[0014] Furthermore, it also includes two fixing blocks respectively fixed on the two outer walls of the positive pressure treatment box. The fixing blocks are provided with through holes for the crossbeam to pass through. One of the fixing blocks is provided with a pin or locking bolt at the top, and one end of the crossbeam is provided with a limiting block that abuts against the other fixing block.

[0015] Furthermore, four casters are installed on the bottom side of the main body of the equipment, and a handrail is installed on the top of the main body of the equipment.

[0016] 1. This invention highly integrates core functions into the main body of the device. The top of the main body is equipped with a detector for electrical testing, the middle is a detection chamber with a drawer structure for negative pressure airtightness testing, and the top is equipped with a positive pressure treatment box for tracer gas pretreatment; electrical testing and negative pressure airtightness testing are completed on one device.

[0017] 2. This device features a positive pressure processing chamber at the top. The relay under test is placed inside, and tracer gases such as helium are introduced and pressurized to over 2 atmospheres, maintained for a period of time. This forces the tracer gas to seep into the relay housing, where leaks may exist. The processed relay is then transferred to a negative pressure detection cylinder in the lower drawer structure. A drive mechanism lifts the negative pressure detection cylinder upwards, ensuring its port is tightly aligned with the sealed inlet / outlet structure at the top of the detection chamber. The negative pressure pump is then activated, creating a vacuum in the detection cylinder. If a leak is present in the relay, the pre-infiltrated tracer gas will be drawn into the negative pressure detection cylinder. The integrated gas sensor within the negative pressure detection cylinder can detect the tracer gas with high precision, thus determining the relay as unqualified. Attached Figure Description

[0018] Figure 1 A schematic diagram of the testing device structure is provided for this invention; Figure 2 This invention provides a schematic diagram of the test device in the open state. Figure 3Provided for the present invention Figure 1 The main view; Figure 4 Provided for the present invention Figure 3 Sectional view at point AA; Figure 5 Provided for the present invention Figure 4 Enlarged view of a section at point B in the middle; Figure 6 Provided for the present invention Figure 4 Enlarged view of a portion of point A in the middle.

[0019] Explanation of reference numerals in the attached figures: 1-Main body of equipment, 2-Drawer structure, 3-Positive pressure treatment box, 4-Detector, 10-Detection chamber, 11-Equipment chamber, 12-Installation chamber two, 13-Installation chamber one, 14-Opening, 15-Modible frame, 16-Telescopic cylinder, 17-Roller, 18-Negative pressure pump, 19-High pressure storage tank, 20-End plate, 21-Box body, 22-Guide sleeve, 23-Through hole, 24-Negative pressure detection cylinder, 31-Positive pressure treatment chamber, 32-Top cover, 33-Fixing block, 34-Horizontal Beam, 35-U-shaped handle, 44-Status indicator light, 101-Drawer slide, 102-Arm handle, 131-Negative pressure piping system, 132-Branch pipe, 133-Solenoid valve, 134-Opening, 136-Sleeve, 137-Protruding ring, 138-Sealing ring, 139-Gas sensor, 151-Top rod, 161-Guide telescopic sleeve rod, 311-Step section, 331-Through hole, 332-Locking bolt or pin, 341-Limit block, 1371-Bracket. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 6 As shown in the figure, an integrated testing device for relay protection equipment provided in this embodiment of the invention mainly includes a device body 1, a detector 4, a drawer structure 2, and a positive pressure processing box 3. The positive pressure processing box 3 and the detector 4 are both installed on the top of the device body 1, and four rollers 17 are installed on the bottom side of the device body 1. A handrail 102 is installed on the top of the device body 1.

[0022] To automate the electrical performance testing of relays, the present invention's tester 4 includes a housing and an internal testing circuit. The housing has multiple sockets 41 for inserting relay pins, a display screen 42 for displaying parameters, and a main test button 43 for controlling the testing process. The testing circuit is based on a microcontroller and integrates a pin scanning and recognition circuit, a programmable linear power drive circuit, a high-precision signal measurement circuit, and a contact impedance measurement circuit. It also pre-stores parameters for common relays.

[0023] To achieve rapid, automatic, and one-button testing of relay electrical performance, this invention employs an intelligent detection circuit and a standardized socket 41. The user simply inserts the relay into any socket 41 and presses the main test button 43, and the microcontroller automatically performs the following: identifying the relay type through pin scanning, then automatically applying a drive voltage that gradually increases from 0V until the relay is engaged, recording the engagement voltage, detecting the status of all contacts, including continuity and contact resistance, and finally reducing the voltage until the relay is released and recording the release voltage.

[0024] The main body 1 of the device of the present invention is provided with an installation cavity 13, a detection cavity 10, an installation cavity 2 12 and a device cavity 11 in sequence from top to bottom; the drawer structure 2 is installed at the opening 14 of the detection cavity 10 via a drawer slide rail 101, and the fixed rail and the moving rail of the drawer slide rail 101 are respectively installed on the detection cavity 10 and the drawer structure 2.

[0025] Among them, such as Figure 5 The drawer structure 2 includes an end plate 20 with a handle, and a box 21 with an open top is connected to one side of the end plate 20. A guide sleeve 22 is fixed on the box 21, and a negative pressure detection cylinder 24 is placed inside each guide sleeve 22.

[0026] The top of the detection chamber 10 is equipped with multiple sealed air inlet and outlet structures, such as... Figure 6 The sealed inlet / outlet structure and the negative pressure detection cylinder 24 are fitted together. Each sealed inlet / outlet structure includes an opening 134, a branch pipe 132, a solenoid valve 133, a sleeve 136, a sealing ring 138, and a gas sensor 139. The two ends of the branch pipe 132 are respectively connected to the opening 134 and the negative pressure pipeline system 131 installed in the installation cavity 13. The negative pressure pipeline system 131 is connected to the negative pressure pump 18 installed in the equipment cavity 11. The solenoid valve 133 is installed on the branch pipe 132. The sleeve 136 is located outside the opening 134 on the top side of the detection cavity 10. The convex ring 137 is located on the inner wall of the sleeve 136. The sealing ring 138 is located on one side of the convex ring 137. A bracket 1371 is installed inside the convex ring 137. The gas sensor 139 is installed on the bracket 1371. During detection, the end of the negative pressure detection cylinder 24 is inserted into the sleeve 136, and the sealing ring 138 abuts against the end face of the negative pressure detection cylinder 24 to form a seal.

[0027] A driving mechanism is provided in the second mounting cavity 12 to drive the negative pressure detection cylinder 24 to move up and down along the axial direction of the guide sleeve 22. The driving mechanism includes a telescopic cylinder 16 vertically mounted on the bottom side of the second mounting cavity 12. The top of the telescopic cylinder 16 is connected to a movable frame 15. A guide telescopic sleeve rod 161 is connected between the movable frame 15 and the bottom side of the second mounting cavity 12. The top of the movable frame 15 is connected to a push rod 151 that penetrates the top of the second mounting cavity 12 and can extend into the detection cavity 10. A through hole 23 is opened on the bottom side of the box 21 located at the guide sleeve 22. When the push rod 151 is pushed upward, it passes through the through hole 23 and abuts against the outer bottom side of the negative pressure detection cylinder 24, and drives the negative pressure detection cylinder 24 to move upward in the vertical direction until the end face of the negative pressure detection cylinder 24 abuts against the sealing ring 138 to form a seal.

[0028] After the negative pressure detection cylinder 24 is sealed and connected, the microcontroller controls the solenoid valve 133 of the corresponding branch to open, the negative pressure pump 18 to work, and evacuate the negative pressure detection cylinder 24. The gas sensor 139 monitors in real time whether there is a tracer gas leak. If there is a leak, the sensor sends a signal, and the corresponding status indicator light 44 on the housing of the detector 4 can indicate the detection result of the station.

[0029] like Figure 1-2 During processing, the positive pressure treatment chamber 3 introduces tracer gas and pressurizes it to 2 standard atmospheres. Multiple independent positive pressure treatment chambers 31 are formed inside the positive pressure treatment chamber 3. The top of the positive pressure treatment chamber 31 is provided with a step 311, and the step 311 is fitted with a top cover 32. An air inlet pipe is connected to the bottom or side wall of the positive pressure treatment chamber 31. The air inlet pipe is connected to a distribution valve. The distribution valve is connected to a high-pressure gas storage tank 19 installed in the equipment chamber 11. The high-pressure gas storage tank 19 stores tracer gas.

[0030] The housing is also equipped with a second main test button 45 and a third main test button 46 that are connected to the microcontroller. The second main test button 45 starts the drive mechanism and the negative pressure pump 18 with one key; the third main test button 46 starts the distribution valve with one key.

[0031] To ensure the positive pressure effect and prevent excessive pressure in the positive pressure treatment chamber 31 from opening the top cover 32, such as... Figure 1 It also includes a fixing structure for fastening the top cover 32. The fixing structure includes a horizontal beam 34 placed above the top cover 32. The two ends of the beam 34 are respectively connected to the two opposite outer walls of the positive pressure treatment box 3. The bottom side of the beam 34 is provided with several grooves. The grooves are connected by springs to movable columns that slide along the inner wall. The movable columns abut against the upper surface of the top cover 32. The end face of the movable columns is a smooth surface. It also includes two fixing blocks 33 respectively fixed on the two outer walls of the positive pressure treatment box 3. The fixing blocks 33 are provided with through holes 331 for the beam 34 to pass through. The top of one fixing block 33 is provided with a pin or locking bolt 332. One end of the beam 34 is provided with a limiting block 341 that abuts against the other fixing block 33.

[0032] The relay requiring a leak test is placed in the positive pressure chamber 31, the top cover 32 is closed, and it is locked with a fixing structure. Tracer gas is then introduced from the high-pressure gas tank 19 and pressurized to at least 1.2 atmospheres. This is maintained for a period of time, allowing the tracer gas to permeate into the relay where leaks may exist. This prepares the ground for subsequent high-sensitivity negative pressure leak detection.

[0033] The present invention features a movable column connected to the bottom of the crossbeam 34 by a spring. This allows the movable column to press down on the top cover 32 under the action of the spring when the crossbeam 34 is supported above the positive pressure treatment box 3 by the fixing blocks 33 at both ends, providing uniform clamping force and adapting to minor unevenness. The locking bolt 332 is used to lock the position of the crossbeam and prevent it from loosening. The U-shaped handle 35 facilitates opening and closing the top cover.

[0034] The overall testing process includes: first, testing the electrical performance of the relay using the testing instrument 4; then, placing the qualified relays into the positive pressure treatment chamber 3 for a period of time, removing them and letting them stand in the environment for a period of time, and then placing them into the drawer structure 2 for negative pressure testing. The positive pressure treatment facilitates the injection of tracer gas into the damaged relay. When the relay filled with tracer gas is placed into the drawer structure 2 for negative pressure testing, if the negative pressure test detects the presence of tracer gas, it indicates that the relay is damaged; conversely, if the negative pressure test fails to detect the presence of tracer gas, it indicates that the relay is intact.

[0035] When helium is selected as the tracer gas, the gas sensor 139 is a helium mass spectrometer sensor.

[0036] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. An integrated testing device for relay protection equipment, characterized in that, The device includes a main body (1), a detection cavity (10) is provided inside the main body (1), and the main body (1) located above and below the detection cavity (10) is also provided with a first installation cavity (13) and a second installation cavity (12). The device body (1) is equipped with a detector (4) on its top. The detector (4) includes a housing and a detection circuit inside the housing. The housing is provided with multiple sockets for inserting the pins of the relays to be tested. The electrical contacts of the sockets are all connected to the detection circuit. The detection cavity (10) is equipped with drawer slides (101) on its opposite side walls, and also includes a drawer structure (2). The fixed rail and the moving rail of the drawer slide (101) are respectively installed on the detection cavity (10) and the drawer structure (2). The drawer structure (2) is provided with several negative pressure detection cylinders (24), and the mounting cavity (12) is provided with a driving mechanism that drives the negative pressure detection cylinders (24) to move up and down. The top of the detection cavity (10) is provided with several sealed air inlet and outlet structures that cooperate with the negative pressure detection cylinders (24). A gas sensor (139) connected to the detection circuit is installed in the sealed air inlet and outlet structure. The sealed air inlet and outlet structure is connected to the negative pressure pump (18). The top of the main body (1) of the device is also equipped with a positive pressure treatment box (3), which introduces tracer gas and pressurizes it to at least 1.2 standard atmospheres during the treatment.

2. The integrated testing device for relay protection equipment as described in claim 1, characterized in that, The housing is also equipped with a display screen and a main test button that are electrically connected to the detection circuit; The control circuit is based on a microcontroller and integrates a pin scanning and recognition circuit, a programmable linear power drive circuit, a high-precision signal measurement circuit, and a contact impedance measurement circuit. The control circuit has pre-stored the typical resistance range and operating voltage range of common relay coils. The testing steps are as follows: After inserting the relay into any socket, operate the main test button one, and the instrument will automatically perform the full-process test; first, the relay type is identified by pin scanning, and then a driving voltage that gradually increases from 0V is automatically applied until the relay is energized, the energizing voltage is recorded and held; then the status of all contacts is detected; finally, the voltage is reduced until the relay is released, and the release voltage is recorded; the results of the entire process are displayed on the display within a few seconds.

3. The integrated testing device for relay protection equipment as described in claim 2, characterized in that, The installation cavity (13) is provided with a negative pressure pipeline system (131). The sealed air inlet and outlet structure includes an opening (134) on the top side wall of the detection cavity (10). The negative pressure pipeline system (131) and the opening (134) are connected by a branch pipe (132). A solenoid valve (133) connected to the microcontroller is provided on the branch pipe (132). The housing is also equipped with status indicator lights (44) that work in conjunction with the negative pressure detection cylinder (24).

4. The integrated testing device for relay protection equipment as described in claim 3, characterized in that, The top side of the detection cavity (10) located at the opening (134) is provided with a sleeve (136) that guides and cooperates with the end of the negative pressure detection cylinder (24), and the end of the negative pressure detection cylinder (24) is inserted into the sleeve (136); The inner wall of the sleeve (136) is provided with a protruding ring (137), and a sealing ring (138) is provided on one side of the protruding ring (137) to abut against the end face of the negative pressure detection cylinder (24). A bracket (1371) is provided inside the protruding ring (137), and the gas sensor (139) is mounted on the bracket (1371).

5. An integrated testing device for relay protection equipment as described in any one of claims 2-4, characterized in that, The drive mechanism includes a telescopic cylinder (16) vertically mounted on the bottom side of the mounting cavity two (12), the top of the telescopic cylinder (16) is connected to a movable frame (15), and a guide telescopic sleeve rod (161) is connected between the movable frame (15) and the bottom side of the mounting cavity two (12); the top of the movable frame (15) is connected to a top rod (151) that penetrates the top of the mounting cavity two (12) and can extend into the detection cavity (10); an opening (14) is opened on one side of the detection cavity (10), and the drawer structure (2) is installed at the opening (14); The drawer structure (2) includes an end plate (20) with a handle, and a box body (21) with an open top is connected to one side of the end plate (20). A guide sleeve (22) is fixed on the box body (21), and the negative pressure detection cylinder (24) is placed inside the guide sleeve (22). A through hole (23) for the top rod (151) is opened on the bottom side of the box body (21) located at the guide sleeve (22).

6. The integrated testing device for relay protection equipment as described in claim 1, characterized in that, An equipment cavity (11) is provided inside the equipment body (1) located directly below the second mounting cavity (12), and the negative pressure pump (18) is installed inside the equipment cavity (11); A high-pressure gas storage tank (19) is also fixed inside the equipment cavity (11), and the high-pressure gas storage tank (19) stores tracer gas.

7. The integrated testing device for relay protection equipment as described in claim 6, characterized in that, The positive pressure treatment box (3) has multiple independent positive pressure treatment chambers (31) inside. The top of the positive pressure treatment chamber (31) is provided with a step (311), and the step (311) is fitted with a top cover (32). An air inlet pipe is connected to the bottom or side wall of the positive pressure treatment chamber (31), the air inlet pipe is connected to a distribution valve, and the distribution valve is connected to a high-pressure storage tank (19).

8. The integrated testing device for relay protection equipment as described in claim 7, characterized in that, The top of the top cover (32) is provided with a U-shaped handle (35); It is also provided with a fixing structure for fastening the top cover (32), the fixing structure including a horizontal beam (34) placed above the top cover (32), the two ends of the horizontal beam (34) being connected to the two opposite outer walls of the positive pressure treatment box (3); The bottom side of the crossbeam (34) is provided with several grooves, and a movable column that slides along the inner wall of the groove is connected by a spring. The movable column abuts against the upper surface of the top cover (32), and the end face of the movable column is a smooth surface.

9. The integrated testing device for relay protection equipment as described in claim 8, characterized in that, It also includes two fixing blocks (33) respectively fixed on the two outer walls of the positive pressure treatment box (3). The fixing blocks (33) are provided with through holes (331) for the crossbeam (34) to pass through. One of the fixing blocks (33) is provided with a pin or locking bolt (332) at the top, and one end of the crossbeam (34) is provided with a limiting block (341) that abuts against the other fixing block (33).

10. The integrated testing device for relay protection equipment as described in claim 1, characterized in that, Four rollers (17) are installed on the bottom side of the main body of the equipment (1), and a handrail (102) is installed on the top of the main body of the equipment (1).

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