Active automatic AC / DC relay return coefficient and contact resistance detection device

Abstract

The invention discloses an active automatic AC / DC relay return coefficient and contact resistance detection device, which comprises a first mounting bottom plate, a second mounting bottom plate, a contact piece and an electric hydraulic rod, and is characterized in that a detector body is fixedly mounted on the outer side of the upper end of the first mounting bottom plate, and a display module is arranged in the detector body; the right side of the display module is provided with a rectification module which is also located in the detector body, and the rear end of the detector body is internally provided with a control module. And a second mounting bottom plate is arranged on the outer side of the right end of the first mounting bottom plate. The invention belongs to the technical field of relay detection, and aims to solve the problems that a return coefficient and a contact resistance value cannot be detected at the same time and a relay base cannot be stored when detection is not performed in the prior art. The device has the advantages that the return coefficient and the contact resistance value can be detected at the same time, storage is convenient, the overall size is reduced, and carrying is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of relay detection, and in particular to a device for detecting return coefficient and contact resistance of an active automatic AC / DC relay. Background Art

[0002] Active automatic AC / DC relay is a kind of relay that can work under AC and DC power supply. It contains a control circuit composed of one or more electronic components. These electronic components can amplify, process and convert the input signal to control the output state of the relay. Before using the relay, a detection device is required. The main function of the detection device is to measure the return coefficient and contact resistance of the relay. The return coefficient is an important parameter to measure the stability of the relay operation, and the contact resistance reflects the contact quality of the relay contact.

[0003] The detection of the return coefficient usually adopts the pulse method or the DC method. The pulse method observes the action of the relay by applying a series of pulse voltages to determine the return coefficient. The DC method tests the pull-in voltage and release voltage of the relay by slowly adjusting the voltage of the voltage regulator. The detection of the contact resistance usually adopts the four-wire Kelvin test method. This method can effectively eliminate the influence of the internal resistance and contact resistance of the test system, thereby obtaining more accurate measurement results.

[0004] However, most detection devices have a limited detection range and only have a single function detection. They are unable to detect both the return coefficient and the contact resistance at the same time, which reduces the detection efficiency. At the same time, the relay base cannot be stored when not being detected, so it is exposed to the outside and easily accumulates dust and other pollutants, thereby affecting the accuracy and reliability of the detection, and thus there are certain defects. Summary of the invention

[0005] To this end, the present invention provides a device for detecting the return coefficient and contact resistance of an active automatic AC / DC relay to solve the above problems in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An active automatic AC / DC relay return coefficient and contact resistance detection device comprises a first mounting base plate, a second mounting base plate, a contact sheet and an electric hydraulic rod, a detector body is fixedly mounted on the outer side of the upper end of the first mounting base plate, a display module is arranged inside the detector body, a rectifier module which is also located inside the detector body is installed on the right side of the display module, and a control module is arranged inside the rear end of the detector body;

[0008] A second mounting base is arranged on the outer side of the right end of the first mounting base, and a relay base is fixedly installed on the outer side of the upper end of the second mounting base, a detection head is installed on the inner middle part of the relay base, and a pin hole is opened inside the detection head, a relay body is placed in the middle part of the upper end of the relay base, and a pin body is arranged at the lower end of the relay body;

[0009] A contact sheet is provided inside the relay base, and a contact head is inserted and provided outside the lower end of the contact sheet, a resistance detection module located inside the relay base is provided on the left side of the contact head, and a transformer module is connected to the outer side of the left end of the resistance detection module through a wire;

[0010] An electric hydraulic rod is fixedly installed in the middle of the rear side of the detector body, and a sealing cover is connected to the output end of the electric hydraulic rod. The size of the sealing cover is compatible with the size of the upper end of the relay base.

[0011] Furthermore, a reinforcement plate is welded and fixed to the left side of the rear end of the first installation base plate, and a support plate is fixedly installed on the outer side of the rear end of the first installation base plate.

[0012] Furthermore, positioning rods are fixedly installed on the outer sides of both left and right ends of the detection head, and the lower ends of the positioning rods extend and are inserted into the interior of the relay base.

[0013] Furthermore, a first magnetic block located directly below the detection head is embedded inside the relay base, and a second magnetic block corresponding to the first magnetic block is disposed inside the lower end of the detection head.

[0014] Furthermore, a prefabricated groove compatible with the support plate is opened inside the lower end of the second mounting base plate, and a ball is embedded in the middle of the bottom of the second mounting base plate. Threaded holes are opened through the front end of the second mounting base plate and the left side of the rear end of the first mounting base plate.

[0015] Furthermore, an electric hydraulic rod is fixedly installed in the middle of the rear side of the detector body, and the output end of the electric hydraulic rod is connected to a sealing cover, and the size of the sealing cover is compatible with the size of the upper end of the relay base.

[0016] Furthermore, a connecting plate is integrally fixedly installed on the outer side of the left end of the second mounting base plate, and the connecting plate extends and rotates inside the right rear end of the first mounting base plate.

[0017] Furthermore, a rectangular rod is inserted into the rear end of the first mounting base plate, and the rectangular rod runs through the interior of the connecting plate.

[0018] Furthermore, anti-slip sheets are attached to the outer sides of the lower ends of the first mounting base plate and the support plate.

[0019] Furthermore, a display screen is disposed at the front end of the detector body, and control buttons which are also located at the front side of the detector body are disposed outside the display screen.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. By controlling the normally open or normally closed state of the relay body, then, under the control of the control module, the voltage gradually decreases to below the return voltage of the relay body, and the relay body returns to the initial state. The control module analyzes and calculates the relationship between the input signal and the output state to determine the return coefficient of the relay. During the action and return of the relay body, the resistance detection module measures the resistance value of the normally open or normally closed contact, and transmits the measurement result to the control module for processing. After processing and analyzing the measurement data, the control module obtains various performance indicators of the relay, including action voltage, return voltage, return coefficient, action time and contact resistance value, and displays the results on the display screen for users to view and record, so as to achieve the purpose of detecting the return coefficient and contact resistance value at the same time, thereby improving the detection efficiency;

[0022] 2. By matching the size of the sealing cover with the size of the upper end of the relay base, start the electric hydraulic rod to extend the electric hydraulic rod and drive the sealing cover to move downward. At this time, the sealing cover is covered on the outer side of the upper end of the relay base, so that the upper end of the relay base is sealed, thereby preventing dust and other pollutants from gathering in the relay base and the detection head, effectively preventing dust and pollutants from affecting the accuracy and reliability of the detection;

[0023] 3. A connecting plate is integrally fixedly installed on the outer side of the left end of the second mounting base plate, and the connecting plate extends and rotates inside the right rear end of the first mounting base plate, so that the second mounting base plate and the relay base can be conveniently rotated counterclockwise to the rear end of the detector body through the connecting plate to achieve the purpose of storage, reduce the overall volume, and facilitate carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units based on the technical concepts and exemplary drawings disclosed in the present application.

[0025] Figure 1 A front cross-sectional view of a device for detecting return coefficient and contact resistance of an active automatic AC / DC relay provided in some embodiments of the present invention.

[0026] Figure 2A side cross-sectional view of the connection between a support plate and a second mounting base plate of an active automatic AC / DC relay return coefficient and contact resistance detection device provided in some embodiments of the present invention.

[0027] Figure 3 A front cross-sectional view of the connection between a first mounting base plate and a connecting plate of an active automatic AC / DC relay return coefficient and contact resistance detection device provided in some embodiments of the present invention.

[0028] Figure 4 A top cross-sectional view of the connection between a relay base and a detection head of an active automatic AC / DC relay return coefficient and contact resistance detection device provided in some embodiments of the present invention.

[0029] Figure 5 A top view of a cross-sectional view of a second mounting base plate of an active automatic AC / DC relay return coefficient and contact resistance detection device in a stored state provided in some embodiments of the present invention.

[0030] Figure 6 An active automatic AC / DC relay return coefficient and contact resistance detection device provided in some embodiments of the present invention Figure 1 Enlarged view of point A in the middle.

[0031] Description of reference numerals:

[0032] 1. First mounting base plate; 2. Detector body; 3. Display screen; 4. Control button; 5. Reinforcement plate; 6. Support plate; 7. Second mounting base plate; 8. Relay base; 9. Detection head; 10. Pin hole; 11. Relay body; 12. Plug pin body; 13. Contact piece; 14. First magnetic block; 15. Positioning rod; 16. Second magnetic block; 17. Contact head; 18. Threading tube; 19. Connecting plate; 20. Rectangular rod; 21. Threaded hole; 22. Prefabricated groove; 23. Ball; 24. Anti-slip sheet; 25. Display module; 26. Rectifier module; 27. Electric hydraulic rod; 28. Sealing cover; 29. ​​Heat sink; 30. Control module; 31. Transformer module; 32. Resistance detection module. DETAILED DESCRIPTION

[0033] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0034] like Figures 1 to 6As shown, an active automatic AC / DC relay return coefficient and contact resistance detection device in an embodiment of the first aspect of the present invention includes: a first mounting base plate 1, a second mounting base plate 7 and a contact sheet 13, a detector body 2 is fixedly mounted on the outer side of the upper end of the first mounting base plate 1, and anti-slip sheets 24 are pasted on the outer sides of the lower ends of the first mounting base plate 1 and the support plate 6, a second mounting base plate 7 is arranged on the outer side of the right end of the first mounting base plate 1, and a relay base 8 is fixedly mounted on the outer side of the upper end of the second mounting base plate 7, the first mounting base plate 1 and the second mounting base plate 7 are stably placed on a designated plane, and at this time, the display screen 3 and the relay base 8 are arranged in parallel on the left and right, which is convenient for the subsequent installation of the relay body 11 and the viewing of the detection data.

[0035] A detection head 9 is installed in the middle of the inner side of the relay base 8, and a pin hole 10 is opened inside the detection head 9. A relay body 11 is placed in the middle of the upper end of the relay base 8, and a pin body 12 is provided at the lower end of the relay body 11. The detection head 9 and the pin hole 10 play a good detection role on the relay body 11. Positioning rods 15 are fixedly installed on the outer sides of the left and right ends of the detection head 9, and the lower end of the positioning rod 15 extends and is inserted into the interior of the relay base 8. A first magnetic block 14 located directly below the detection head 9 is inlaid inside the relay base 8, and a second magnetic block 16 corresponding to the first magnetic block 14 is provided inside the lower end of the detection head 9;

[0036] A contact piece 13 is provided inside the relay base 8, and a contact head 17 is plugged into the outer side of the lower end of the contact piece 13. Before detection, an appropriate detection head 9 is selected according to the model of the relay body 11 and the number of the plug-in pin body 12, and the detection head 9 is inserted into the inner middle part of the relay base 8. At this time, the positioning rod 15 is inserted into the interior of the relay base 8, which plays a good positioning role for the detection head 9 and improves the accuracy of the installation of the detection head 9. With the insertion of the detection head 9, the lower end of the contact piece 13 is inserted into the interior of the contact head 17 so as to transmit the detection signal to the contact head 17. At the same time, the detection head 9 is tightly installed in the interior of the relay base 8 under the action of the magnetic connection between the first magnetic block 14 and the second magnetic block 16. The magnetic connection can improve the convenience of subsequent replacement of the detection head 9. After the detection head 9 is installed, the relay body 11 to be detected is placed in the upper end of the relay base 8, so that the plug-in pin body 12 is inserted into the corresponding pin hole 10 and contacts with the contact piece 13.

[0037] A resistance detection module 32 located in the relay base 8 is provided on the left side of the contact head 17, and the outer side of the left end of the resistance detection module 32 is connected to the transformer module 31 through a wire, and the contact head 17 is respectively connected to the transformer module 31 and the resistance detection module 32 through wires to transmit detection signals, wherein the resistance detection module 32 is used to measure the resistance value of the relay contact, and the output signal of the resistance detection module 32 is connected to the control module 30, and the measurement result is transmitted to the control module 30 for processing, and the transformer module 31 receives the direct current provided by the rectifier module 26 through the guide, and adjusts the output voltage as needed, and the output end of the transformer module 31 is connected to the contact head 17 to provide the required voltage for the contact head 17;

[0038] A display screen 3 is provided at the front end of the detector body 2, and a control button 4 which is also located at the front side of the detector body 2 is provided on the outside of the display screen 3. A display module 25 is provided inside the detector body 2, and a rectifier module 26 which is also located in the detector body 2 is installed on the right side of the display module 25. A control module 30 is provided inside the rear end of the detector body 2. The rectifier module 26 is responsible for converting AC power into DC power, and its output end is connected to the input end of the transformer module 31 to provide a stable DC power supply for it. The control module 30 is based on PLC control technology, and the detection process and related calculation processes are set at the factory. As the core of the detection device, it is responsible for receiving instructions input by the user, controlling the working status of each module, and processing detection data. The display module 25 is connected to the control module 30, receives and displays the processed data sent by the control module 30, and the display module 25 is connected to the display screen 3. The user can view various performance indicators of the detection through the display screen 3, including action voltage, return voltage, return coefficient, action time, and contact resistance value;

[0039] The lower right end of the detector body 2 and the lower left end of the relay base 8 are both provided with a threading tube 18 to facilitate insertion of various connecting wires;

[0040] During the detection, after the plug pin body 12 is stably inserted into the plug pin hole 10, the user inputs the basic information such as the model and voltage level of the relay body 11 through the display screen 3 and the control button 4. After the control module 30 receives the instruction input by the user, it controls the working state of each module according to the instruction. The rectifier module 26 converts the input AC power into DC power and outputs it to the transformer module 31. The transformer module 31 outputs the corresponding voltage value according to the voltage level set by the user and transmits it to the plug pin body 12 through the contact head 17 and the contact piece 13. Under the action of the voltage, the relay body 11 switches to the corresponding normally open or normally closed state. Subsequently, under the control of the control module 30, the voltage gradually decreases to below the return voltage of the relay body 11, and the relay body 11 returns to the initial state. The control module 30 analyzes and calculates the relationship between the input signal and the output state to determine the return coefficient of the relay.

[0041] During the action and return of the relay body 11, the resistance detection module 32 measures the resistance value of the normally open or normally closed contact, and transmits the measurement result to the control module 30 for processing. The control module 30 processes and analyzes the measurement data to obtain various performance indicators of the relay, including action voltage, return voltage, return coefficient, action time and contact resistance value, etc., and displays the results on the display screen 3 for users to view and record, so as to achieve the purpose of simultaneously detecting the return coefficient and contact resistance value, thereby improving the detection efficiency.

[0042] A connecting plate 19 is integrally fixedly installed on the outer side of the left end of the second mounting base plate 7, and the connecting plate 19 extends and rotates inside the right rear end of the first mounting base plate 1. A rectangular rod 20 is inserted and provided inside the rear end of the first mounting base plate 1, and the rectangular rod 20 penetrates the inside of the connecting plate 19. After the inspection is completed, the relay body 11 and the plug body 12 are removed, and then the rectangular rod 20 is pulled out from the connecting plate 19 and the first mounting base plate 1, so that the rectangular rod 20 loses its fixing effect on the connecting plate 19;

[0043] A reinforcing plate 5 is welded and fixed to the left side of the rear end of the first mounting base plate 1, and a supporting plate 6 is fixedly installed on the outer side of the rear end of the first mounting base plate 1. A prefabricated groove 22 adapted to the supporting plate 6 is opened inside the lower end of the second mounting base plate 7. The curvature of the supporting plate 6 is adapted to the rotation curvature of the relay base 8, which is the central axis circle to avoid affecting the rotation and storage of the relay base 8, and a ball 23 is inlaid at the middle end of the bottom of the second mounting base plate 7. Threaded holes 21 are opened through the inside of the front end of the second mounting base plate 7 and the left side of the rear end of the first mounting base plate 1. The relay base 8 is rotated counterclockwise to make the ball 23 roll with the plane to ensure the stability of the relay base 8 when it is stored. As the relay base 8 rotates, the relay base 8 moves to the rear end of the detector body 2. At this time, the second mounting base plate 7 is located on the outer side of the upper end of the supporting plate 6, so that the supporting plate 6 can better support the second mounting base plate 7 and the relay base 8, which is convenient for subsequent carrying.

[0044] Threaded holes 21 are provided inside the front end of the second mounting base plate 7 and on the left side of the rear end of the first mounting base plate 1. When the relay base 8 is completely rotated to the rear end of the detector body 2, bolts can be selectively inserted into the threaded holes 21 inside the second mounting base plate 7 and the first mounting base plate 1 to facilitate fixing the relay base 8 and improve the storage effect.

[0045] An electric hydraulic rod 27 is fixedly installed in the middle of the rear side of the detector body 2, and a sealing cover 28 is connected to the output end of the electric hydraulic rod 27. The size of the sealing cover 28 is adapted to the size of the upper end of the relay base 8. The electric hydraulic rod 27 is started to extend the electric hydraulic rod 27 and drive the sealing cover 28 to move downward. At this time, the sealing cover 28 covers the outer side of the upper end of the relay base 8, so that the upper end of the relay base 8 is sealed, thereby preventing dust and other pollutants from gathering in the relay base 8 and the detection head 9, and effectively preventing dust and pollutants from affecting the accuracy and reliability of the detection;

[0046] Heat dissipation slots 29 are provided at equal intervals on the outer side of the detector body 2 to improve the heat dissipation effect.

[0047] The technical features of the above embodiments can be combined arbitrarily as long as there is no contradiction in the combination of these technical features. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A device for detecting return coefficient and contact resistance of an active automatic AC / DC relay, comprising a first mounting base plate (1), a second mounting base plate (7), a contact sheet (13) and an electric hydraulic rod (27), characterized in that: A detector body (2) is fixedly mounted on the outer side of the upper end of the first mounting base plate (1), and a display module (25) is arranged inside the detector body (2), a rectifier module (26) which is also located inside the detector body (2) is installed on the right side of the display module (25), and a control module (30) is arranged inside the rear end of the detector body (2); A second mounting base plate (7) is arranged on the outer side of the right end of the first mounting base plate (1), and a relay base (8) is fixedly mounted on the outer side of the upper end of the second mounting base plate (7), a detection head (9) is mounted on the middle part of the inner side of the relay base (8), and a pin hole (10) is provided inside the detection head (9), a relay body (11) is placed on the middle part of the upper end of the relay base (8), and a pin body (12) is arranged on the lower end of the relay body (11); A contact sheet (13) is provided inside the relay base (8), and a contact head (17) is inserted and provided on the outer side of the lower end of the contact sheet (13); a resistance detection module (32) located inside the relay base (8) is provided on the left side of the contact head (17), and a transformer module (31) is connected to the outer side of the left end of the resistance detection module (32) via a wire; An electric hydraulic rod (27) is fixedly mounted in the middle of the rear side of the detector body (2), and a sealing cover (28) is connected to the output end of the electric hydraulic rod (27), wherein the size of the sealing cover (28) matches the size of the upper end of the relay base (8).

2. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: A reinforcing plate (5) is welded and fixed on the left side of the rear end of the first installation base plate (1), and a supporting plate (6) is fixedly installed on the outer side of the rear end of the first installation base plate (1).

3. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: Positioning rods (15) are fixedly mounted on the outer sides of both left and right ends of the detection head (9), and the lower ends of the positioning rods (15) extend and are inserted into the interior of the relay base (8).

4. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 3, characterized in that: The relay base (8) is embedded with a first magnetic block (14) located directly below the detection head (9), and a second magnetic block (16) corresponding to the first magnetic block (14) is arranged inside the lower end of the detection head (9).

5. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: A prefabricated groove (22) adapted to the support plate (6) is provided inside the lower end of the second mounting base plate (7), and a ball bearing (23) is embedded in the middle of the bottom of the second mounting base plate (7). A threaded hole (21) is provided through the inside of the front end of the second mounting base plate (7) and the left side of the rear end of the first mounting base plate (1).

6. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: A connecting plate (19) is integrally fixedly mounted on the outer side of the left end of the second mounting base plate (7), and the connecting plate (19) extends and rotates inside the right rear end of the first mounting base plate (1).

7. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 6, characterized in that: A rectangular rod (20) is inserted into the rear end of the first mounting base plate (1), and the rectangular rod (20) passes through the interior of the connecting plate (19).

8. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: Anti-slip sheets (24) are glued to the outer sides of the lower ends of the first mounting base plate (1) and the support plate (6).

9. The active automatic AC / DC relay return coefficient and contact resistance detection device according to claim 1, characterized in that: A display screen (3) is arranged at the front end of the detector body (2), and a control button (4) is arranged on the outside of the display screen (3) and is also located on the front side of the detector body (2).

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