A relay tester

Abstract

The present invention relates to the field of electrical device measurement technology, and in particular to a relay tester. Its technical solution includes: a protective box, a power supply box, and a locking block. The power supply box is slidably mounted inside the protective box via a slider. A relay tester body is fixedly mounted on the top of the power supply box. A relay body is fixedly mounted on the top of the relay tester body. The relay body and the relay tester body are electrically connected via a wire. A cover is movably mounted on the top of the protective box. The present invention utilizes the power supply box, the relay tester body, and the coordination between the relay body and the SA transfer switch to inspect and repair the automatic system through the relay body. Inspection and repair time can be greatly reduced, fault points can be quickly identified, and repair efficiency is improved. This effectively avoids replacing a large number of relays and causing spare parts losses.

Description

Technical Field

[0001] The invention relates to the technical field of electrical device measurement, in particular to a relay tester. Background Art

[0002] Automation equipment accounts for a huge proportion in modern dust removal equipment. A large number of PLCs are used in automation equipment, and their output is generally 24-volt relays. The failure rate of this relay is relatively high. Whenever a fault occurs, it is difficult to find the fault point. In the past, all relay bodies in the control cabinet were directly replaced with new relay bodies. Although this can quickly handle the fault, it is time-consuming. In addition, except for some faulty relays, the rest of the replaced relays are fine, resulting in serious waste. Therefore, in order to quickly check and repair and avoid wasting spare parts, this 24-volt relay tester has been specially developed. It can quickly find the faulty relay for replacement and shorten equipment downtime. Therefore, a relay tester is needed.

[0003] After searching, the patent announcement number CN210199261U discloses a relay board tester. The invention discloses a relay board tester, which is characterized by: including a box body, on which a socket, a relay working power supply, a relay control power supply and a signal output display circuit are installed; a socket is provided on the outer surface of the box body; the relay working power supply is used to power the induction coils of each relay on the relay board, and the relay control power supply is used to power the base of the transistor in the control circuit of each relay on the relay board; the signal output display circuit includes a signal output power supply, and the signal output power supply is connected to a contact of each relay through a socket, and the other contact of each relay is located on the output circuit; the signal output display circuit also includes a light-emitting tube that corresponds to each relay one by one and is provided on the output circuit of each relay.

[0004] The defects of existing relay testers are:

[0005] 1. In the process of using the existing relay tester, modern dust removal equipment widely applies automatic control technology, and more uses PLC output to relay execution. Since the relay contacts directly carry loads, they are frequently damaged. The existing detection is mostly carried out by multimeter, which cannot accurately judge in a short time. It is inconvenient to judge the quality of internal contacts and it is impossible to quickly find the relay with damaged internal contacts at the fault site, which reduces convenience and increases the workload of staff.

[0006] 2. General relay testers lack protective structures. During use, the tester needs to be carried to the working area. During the carrying process, the tester may be damaged by collision, which makes it less convenient to carry. Therefore, we propose a relay tester to solve the existing problem. Summary of the Invention

[0007] The object of the present invention is to provide a relay tester to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a relay tester, comprising a protective box, a power box and a locking block, the power box being slidably installed inside the protective box through a slider, the relay tester body being fixedly installed on the top of the power box, the relay body being fixedly installed on the top of the relay tester body, the relay body and the relay tester body being electrically connected through a wire, a cover being movably installed on the top of the protective box, a control panel being fixedly installed on the top of the relay tester body at the front end of the relay body, an SA switching switch being movably installed on the top of the control panel, a mounting plate corresponding to the protective box being fixedly installed on the front end of the power box, and heat dissipation holes and exhaust holes being provided at the bottom of the power box.

[0009] By inspecting the automatic system through the relay body, the inspection and maintenance time can be greatly reduced, the fault point can be quickly determined, the maintenance efficiency is improved, and the replacement of a large number of relays and the loss of spare parts can be effectively avoided.

[0010] Preferably, the inner walls of the protection box are provided with grooves that cooperate with the slider, and the protection box and the cover plate are movably mounted via a rotating shaft, so that the cover plate and the protection box can be flipped more conveniently to close the cover plate and provide better protection.

[0011] Preferably, the protective box and the slider are fixed by a fixing knob, and docking holes that cooperate with the fixing knobs are provided on both sides of the slider. By docking the fixing knobs with the docking holes, the power box can be conveniently fixed in position inside the protective box, making it safer during use.

[0012] Preferably, the top of the protective box is provided with an observation window, and the control panel is provided with an indicator bar that cooperates with the SA switch. The observation window allows for convenient observation of the relay body inside the protective box, allowing for more intuitive operation of the interior, making use more convenient.

[0013] Preferably, a snap-fit ​​block for cooperating with the SA switch is movably mounted on the top of the protection box, and a rotating block is fixedly mounted on the top of the snap-fit ​​block. The snap-fit ​​block can be conveniently connected to both sides of the SA switch, and the SA switch can be easily rotated by rotating the rotating block, making control more convenient.

[0014] Preferably, an indicator board is fixedly mounted on the top of the relay tester body at the rear end of the relay body, and a light emitting diode is fixedly mounted on the top of the indicator board. The light emitting diode can facilitate circuit maintenance, thereby increasing convenience.

[0015] Preferably, a handle is fixedly mounted on the front end of the mounting plate, and an anti-slip pad is fixedly mounted on the outside of the handle. The mounting plate can be easily pulled by the handle, making it more efficient when used.

[0016] Preferably, a docking block is fixedly mounted on the front end of the cover plate, and a docking groove is provided on the rear end of the mounting plate to cooperate with the docking block. By flipping the cover plate, the docking block can be conveniently docked with the docking groove, so that the mounting plate can conveniently limit and fix the cover plates.

[0017] Preferably, a cushion corresponding to the cover is fixedly mounted on the top of the protective box, and a ventilation hole is provided at the bottom of the protective box to match the heat dissipation hole and the exhaust hole, so as to better dissipate heat from the power box and prevent the internal stability from being too high and causing damage to the internal circuit.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By setting up the power box, relay tester body, relay body and SA transfer switch to cooperate with each other, the automatic system can be inspected and repaired through the relay body, which can greatly reduce the inspection and maintenance time, quickly determine the fault point, improve the maintenance efficiency, and effectively avoid replacing a large number of relays and causing spare parts loss.

[0020] 2. By cooperating with each other, the power box can be slidably installed inside the protective box through the cover, the top of the relay tester body can be covered by the cover, and the cover and the mounting plate can be conveniently fixed by docking with the docking block. The power box can be fixed inside the protective box by the fixing knob, making the protection process more efficient and preventing the relay body from being damaged by collision during carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a first three-dimensional front view of the present invention;

[0022] Figure 2 This is a second three-dimensional front view of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the electric chute portion of the present invention;

[0024] Figure 4 It is a schematic diagram of the partial structure of the power box of the present invention;

[0025] Figure 5 It is a schematic diagram of the partial structure of the protection box of the present invention;

[0026] Figure 6 This is a circuit diagram of the working principle of the present invention;

[0027] Figure 7 This is a schematic diagram of the top view of the main body of the relay tester of the present invention.

[0028] In the figure: 1. Protective box; 101. Cover plate; 102. Observation window; 103. Rotating block; 104. Mounting plate; 105. Grip; 106. Anti-slip pad; 107. Fixing knob; 108. Buffer pad; 109. Docking slot; 2. Power box; 201. Relay tester body; 202. Relay body; 203. Wire; 204. Indicator board; 205. Light-emitting diode; 206. Docking block; 207. Control panel; 208. SA switch; 209. Indicator bar; 3. Engaging block; 301. Rotating shaft; 302. Slide groove; 303. Slider; 304. Docking hole; 305. Ventilation hole; 306. Heat dissipation hole; 307. Exhaust hole. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1-7As shown, a relay tester proposed in the present invention includes a protective box 1, a power box 2 and a locking block 3. The power box 2 is slidably installed inside the protective box 1 through a slider 303. The relay tester body 201 is fixedly installed on the top of the power box 2. The relay body 202 is fixedly installed on the top of the relay tester body 201. The relay body 202 and the relay tester body 201 are electrically connected through a wire 203. A cover plate 101 is movably installed on the top of the protective box 1. A control panel 207 is fixedly installed on the top of the relay tester body 201 at the front end of the relay body 202. An SA conversion switch 208 is movably installed on the top of the control panel 207. A mounting plate 104 corresponding to the protective box 1 is fixedly installed on the front end of the power box 2. Heat dissipation holes 306 and exhaust holes 307 are provided at the bottom of the power box 2. Slide grooves 302 cooperating with the slider 303 are provided on both sides of the inner wall of the protective box 1, and the protective box 1 and the cover plate 101 are movably connected through the rotating shaft 301 The protective box 1 and the slider 303 are fixed by a fixed knob 107, and the two sides of the slider 303 are provided with docking holes 304 that cooperate with the fixed knob 107. The control panel 207 is provided with an indicator bar 209 that cooperates with the SA switch 208. The top of the protective box 1 is movably installed with a snap-fit ​​block 3 that cooperates with the SA switch 208, and the top of the snap-fit ​​block 3 is fixedly installed with a rotating block 103. The top of the relay tester body 201 at the rear end of the relay body 202 An indicator plate 204 is fixedly mounted on the top, and a light-emitting diode 205 is fixedly mounted on the top of the indicator plate 204, a handle 105 is fixedly mounted on the front end of the mounting plate 104, and a non-slip pad 106 is fixedly mounted on the outside of the handle 105, a docking block 206 is fixedly mounted on the front end of the cover 101, a docking groove 109 is provided at the rear end of the mounting plate 104 for cooperating with the docking block 206, and an air vent 305 is provided at the bottom of the protective box 1 for cooperating with the heat dissipation hole 306 and the exhaust hole 307.

[0032] The working principle of the relay tester based on Example 1 is as follows: the relay body 202 is 24V, and when the AC power passes through the DC power supply T, it is converted into 24V DC power output positive and negative poles, and the positive pole is sent to pins 1, 3, 5 and 7 of the SA conversion switch 208. When the SA conversion switch 208 is in the power-off position, pins 1 and 2 are closed, so that 24V power passes through the current limiting resistor R1 to LED1, making it light up in the power-off indication state, and pins 5 and 6 are closed. 24V DC passes through the normally closed contacts 1 and 9, 2 and 3 of the relay body 202 under test. Pin 10, pin 3 and pin 11, pin 4 and pin 12 reach R3, R4, R5, and R6 respectively, and then supply power to LED3, LED4, LED5, and LED6 of light-emitting diode 205 respectively. If the four normally closed contacts are in good contact, the four light-emitting diodes 205 will light normally. If any of the contacts is in poor contact, the corresponding light-emitting diode 205 will not light up. When the SA switch 208 is in the power supply position, pins 3 and 4 are closed, so that 24V electricity passes through the current-limiting resistor R2 to LED2, causing it to light up and indicate the power supply state.

[0033] Pins 7 and 8 are closed, and 24V DC is supplied to the relay body 202K under test through pins 7 and 8, causing it to attract and all normally open contacts to close. At the same time, 24V DC is supplied to R3, R4, R5, and R6 through the normally open contacts 5 and 9, 6 and 10, 7 and 11, and 8 and 12 of the relay body 202 under test, respectively, and then supplies power to LED3, LED4, LED5, and LED6 of the light-emitting diode 205, respectively. If the four normally open contacts are in good contact after closing, the four light-emitting diodes 205 will light up normally. If any of the contacts is in poor contact, the corresponding diode will not light up.

[0034] When the SA transfer switch 208 is in the power-off state and the power-on state, the corresponding four diodes all light up normally, proving that the relay body 202 under test is in good condition and can be used. If any of the diodes lights up abnormally, it proves that the contacts of the relay body 202 under test are damaged and cannot be used. When the relay body 202 in the automation control system fails, the PLC can normally issue an operating instruction, but the equipment on site cannot operate. The relay body 202 in the automatic control box can be removed and tested with the relay tester body 201. When the unqualified relay body 202 is found, it is replaced with a new one, and the fault is eliminated.

[0035] At the same time, when the relay body 202 is carried, it slides between the slider 303 and the slide groove 302, so that during use, the power box 2 can be limited and fixed inside the protective box 1, and the docking block 206 can be conveniently docked with the docking groove 109 by flipping the cover 101, so that the mounting plate 104 can conveniently limit and fix the cover 101, and the two sides of the SA conversion switch 208 can be conveniently docked by the locking block 3. The SA conversion switch 208 can be conveniently driven to rotate by rotating the rotating block 103, making it more convenient to use. The surface of the relay tester body 201 is covered by the cover 101, so that it can be better protected during the carrying and transfer process, preventing the instrument from being damaged by external collisions, and increasing its service life.

[0036] Example 2

[0037] like Figure 1-7 As shown, the relay tester proposed by the present invention, compared with the first embodiment, further includes: an observation window 102 is provided on the top of the protection box 1, and a buffer pad 108 corresponding to the cover 101 is fixedly installed on the top of the protection box 1.

[0038] In this embodiment, the relay body 202 inside the protective box 1 can be conveniently observed through the observation window 102, and the internal operation can be more intuitive, making it more convenient to use. The buffer pad 108 can conveniently buffer the cover 101 and the protective box 1 during the closing process to prevent damage caused by excessive downward pressure, thereby increasing practicality.

[0039] The above specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A relay tester, comprising a protection box (1), a power supply box (2) and a locking block (3), characterized in that: A power supply box (2) is slidably mounted inside the protection box (1) via a slider (303); a relay tester body (201) is fixedly mounted on the top of the power supply box (2); a relay body (202) is fixedly mounted on the top of the relay tester body (201); the relay body (202) and the relay tester body (201) are electrically connected via a wire (203); a cover plate (101) is movably mounted on the top of the protection box (1); a control panel (207) is fixedly mounted on the top of the relay tester body (201) at the front end of the relay body (202); an SA switching switch (208) is movably mounted on the top of the control panel (207); a mounting plate (104) corresponding to the protection box (1) is fixedly mounted on the front end of the power supply box (2); and a heat dissipation hole (306) and an exhaust hole (307) are provided at the bottom of the power supply box (2); The top of the protection box (1) is provided with an observation window (102), and the control panel (207) is provided with an indicator bar (209) that cooperates with the SA conversion switch (208); A snap-fit ​​block (3) cooperating with the SA switch (208) is movably mounted on the top of the protection box (1), and a rotating block (103) is fixedly mounted on the top of the snap-fit ​​block (3); A buffer pad (108) corresponding to the cover plate (101) is fixedly mounted on the top of the protection box (1), and a vent hole (305) cooperating with the heat dissipation hole (306) and the exhaust hole (307) is provided on the bottom of the protection box (1); The relay body is 24V. When the AC power passes through the DC power supply T, it is converted into 24V DC power output positive and negative poles. The positive pole is sent to pins 1, 3, 5 and 7 of the SA transfer switch. When the SA transfer switch is in the power-off position, pins 1 and 2 are closed, so the 24V power is sent to LED1 through the current limiting resistor R1, making it light up in the power-off indication state. Pins 5 and 6 are closed, and 24V DC is sent to R3, R4, R5, and R6 through the normally closed contacts 1 and 9, 2 and 10, 3 and 11, and 4 and 12 of the relay body under test, respectively. Then, power is supplied to the LEDs LED3, LED4, LED5 and LED6 respectively. If the four normally closed contacts are in good contact, the four LEDs will light up normally. If any of the contacts is in poor contact, the corresponding LED will not light up. When the SA transfer switch is in the power-on position, pins 3 and 4 are closed, so the 24V power is sent to LED2 through the current limiting resistor R2, making it light up in the power-on indication state. Pins 7 and 8 are closed, and 24V DC is supplied to the relay body 202K under test through pins 7 and 8, causing it to close and all normally open contacts to close. At the same time, 24V DC is supplied to R3, R4, R5, and R6 through the normally open contacts of the relay body under test (pins 5 and 9, pins 6 and 10, pins 7 and 11, and pins 8 and 12), and then to the light-emitting diodes LED3, LED4, LED5, and LED6, respectively. If the four normally open contacts are in good contact after closing, the four light-emitting diodes will light up normally. If any of the contacts is in poor contact, the corresponding diode will not light up. When the SA transfer switch is in the power-off state and the power-on state, the corresponding four diodes all light up normally, proving that the relay body under test is in good condition and can be used. If any one of the diodes lights up abnormally, it proves that the contacts of the relay body under test are damaged and cannot be used. When the relay body in the automation control system fails, the PLC can normally issue operating instructions, but the on-site equipment cannot operate. The relay body in the automatic control box can be removed and tested with a relay tester. When the unqualified relay body is found, it is replaced with a new one and the fault is eliminated.

2. A relay tester according to claim 1, characterized in that: Slide grooves (302) cooperating with the slider (303) are provided on both sides of the inner wall of the protection box (1), and the protection box (1) and the cover plate (101) are movably mounted via a rotating shaft (301).

3. A relay tester according to claim 1, characterized in that: The protection box (1) and the slider (303) are fixed via a fixing knob (107), and docking holes (304) that cooperate with the fixing knob (107) are provided on both sides of the slider (303).

4. A relay tester according to claim 1, characterized in that: An indicator board (204) is fixedly mounted on the top of the relay tester body (201) at the rear end of the relay body (202), and a light emitting diode (205) is fixedly mounted on the top of the indicator board (204).

5. A relay tester according to claim 1, characterized in that: A handle (105) is fixedly mounted on the front end of the mounting plate (104), and an anti-slip pad (106) is fixedly mounted on the outer side of the handle (105).

6. A relay tester according to claim 1, characterized in that: A docking block (206) is fixedly mounted on the front end of the cover plate (101), and a docking groove (109) matching with the docking block (206) is provided on the rear end of the mounting plate (104).

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