CN217561667U - Relay life testing device - Google Patents
Relay life testing device Download PDFInfo
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- CN217561667U CN217561667U CN202221470057.4U CN202221470057U CN217561667U CN 217561667 U CN217561667 U CN 217561667U CN 202221470057 U CN202221470057 U CN 202221470057U CN 217561667 U CN217561667 U CN 217561667U
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Abstract
The utility model discloses a relay life testing device, two input ends of a timing driving circuit are correspondingly connected with a first output end and a second output end of an external power supply, the first output end of the timing driving circuit is connected with the second output end of the external power supply, the second output end of the timing driving circuit is connected with a first power supply end of a tested relay, and a second power supply end of the tested relay is connected with the first output end of the external power supply; the capacitive load circuit is respectively connected with the voltage counter and the discharge circuit in parallel; the first end of the capacitive load circuit is connected with the first end of the relay to be tested, and the second end of the capacitive load circuit is connected with a zero line of an external test power supply; and the second end of the tested relay is connected with a live wire of an external test power supply. Through using capacitive load circuit, it is bigger to the surge impulse current of being surveyed the relay, more presses close to reality and more harsher relay life test dynamics to the test of relay.
Description
Technical Field
The utility model relates to a relay technical field, concretely relates to relay life test device.
Background
With the development of science and technology, the application fields of relays are increasingly wider, including signal relays for communication and signal control, power relays for household, industrial control and power control, power relays for power control and automobile relays for the automobile field. In order to ensure the reliability and durability of the relay, a special device is required to carry out a service life test on the relay contact under a large current. Most of the existing relay service life testing devices in the market test the relay pins through a large-current loop formed by connecting a power supply, a tested relay and a load in series. The existing testing device mostly uses resistive load and inductive load, the maximum impact current is only 5-10 times of steady-state current, the impact on the pins of the relay is not enough, and the surge impact current possibly suffered by the relay in the actual use process cannot be completely simulated.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the relay life-span testing arrangement who uses resistive load and inductive load more among the prior art, can not simulate the defect of the surge impulse current that probably receives in the relay in-service use completely to a relay life-span testing arrangement is provided.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an embodiment of the utility model provides a relay life test device, include: the device comprises a timing driving circuit, a capacitive load circuit, a discharge circuit and a voltage counter, wherein two input ends of the timing driving circuit are correspondingly connected with a first output end and a second output end of an external power supply; the capacitive load circuit is respectively connected with the voltage counter and the discharge circuit in parallel; the first end of the capacitive load circuit is connected with the first end of the relay to be tested, and the second end of the capacitive load circuit is connected with a zero line of an external test power supply; and the second end of the tested relay is connected with a live wire of an external test power supply.
In one embodiment, a timing driving circuit includes: a time relay; the first power supply end of the time relay is connected with the first output end of the external power supply, the second power supply end of the time relay is connected with the second output end of the external power supply, and the first output end of the time relay is connected with the first power supply end of the relay to be tested.
In one embodiment, the timing driving circuit further includes: a reset button; the first end and the second end of the reset button are correspondingly connected with the two reset ends of the time relay.
In one embodiment, the timing driving circuit further includes: a pause button; the first end and the second end of the pause button are correspondingly connected with the two pause control ends of the time relay.
In one embodiment, a capacitive load circuit includes: at least one capacitive load branch, wherein, when the capacitive load circuit comprises at least two capacitive load branches, all capacitive load branches are connected in parallel; each capacitive load branch is formed by connecting a capacitor and a control switch in series.
In one embodiment, a discharge circuit includes: at least one discharge resistor.
In one embodiment, the relay life testing apparatus further includes: a count zero clearing button; the first end and the second end of the counting zero clearing button are correspondingly connected with the two zero clearing control ends of the voltage counter.
In one embodiment, the relay life testing apparatus further includes: an indicator light; the first end of pilot lamp passes through the voltage counter and is connected with the first end of relay under test, and the second end of pilot lamp is connected with external test power supply's zero line.
In one embodiment, the relay life testing apparatus further includes: a circuit breaker; the first input end of the circuit breaker is connected with the live wire of the external test power supply, the second input end of the circuit breaker is connected with the zero line of the external test power supply, the first output end of the circuit breaker is connected with the second end of the tested relay, and the second end of the circuit breaker is connected with the second end of the indicator light and the second end of the capacitive load circuit.
In one embodiment, the relay life testing apparatus further includes: testing the power supply; the first power supply end of the test power supply is connected with the first input end of the circuit breaker, and the second power supply end of the test power supply is connected with the second input end of the circuit breaker.
The utility model discloses technical scheme has following advantage:
the utility model provides a relay life test device, two input ends of timing drive circuit correspond with external power supply's first output, second output and are connected, and timing drive circuit's first output is connected with external power supply's second output, and timing drive circuit's second output is connected with the first feed end of relay under test, and the second feed end of relay under test is connected with external power supply's first output; the capacitive load circuit is respectively connected with the voltage counter and the discharge circuit in parallel; the first end of the capacitive load circuit is connected with the first end of the relay to be tested, and the second end of the capacitive load circuit is connected with a zero line of an external test power supply; and the second end of the tested relay is connected with a live wire of an external test power supply. Through using capacitive load circuit, it is bigger to the surge impulse current of being surveyed the relay, more presses close to reality and more harsher relay life test dynamics to the test of relay.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Drawings
Fig. 1 is a composition diagram of a specific example of a relay life testing apparatus provided in an embodiment of the present invention;
fig. 2 is a composition diagram of another specific example of a relay life testing apparatus according to an embodiment of the present invention;
fig. 3 is a composition diagram of another specific example of a relay life testing apparatus according to an embodiment of the present invention;
fig. 4 is a composition diagram of another specific example of the relay life testing apparatus according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Examples
An embodiment of the utility model provides a relay life-span testing arrangement, as shown in fig. 1, include: a timing drive circuit 1, a capacitive load circuit 2, a discharge circuit 3, and a voltage counter 4.
As shown in fig. 1, two input terminals of the timing driving circuit 1 are correspondingly connected to a first output terminal and a second output terminal of the external power supply, the first output terminal of the timing driving circuit 1 is connected to the second output terminal of the external power supply, the first output terminal of the timing driving circuit 1 is connected to a first power supply terminal of the relay to be tested, and the second power supply terminal of the relay to be tested is connected to the first output terminal of the external power supply; the capacitive load circuit 2 is respectively connected with the voltage counter 4 and the discharge circuit 3 in parallel; the first end of the capacitive load circuit 2 is connected with the first end of the relay to be tested, and the second end of the capacitive load circuit 2 is connected with a zero line of an external test power supply; and the second end of the tested relay is connected with the live wire of the external test power supply.
Specifically, the timing driving circuit 1 of the embodiment of the present invention will control the on/off of the relay to be tested in a timing manner, for example: after the tested relay is continuously controlled to be closed for the first preset time, the tested relay is continuously controlled to be opened for the second preset time, then the tested relay is continuously controlled to be closed for the first preset time, and the operation is repeated in such a cycle, wherein the first preset time and the second preset time are set according to actual needs without limitation.
Further, the timing drive circuit 1 controls the on time of the relay to be measured based on the charging time of the capacitive load circuit 2, and controls the off time of the relay to be measured based on the discharging time of the capacitive load circuit 2. Specifically, when the relay to be tested is closed, since the capacitive reactance of the capacitive load circuit 2 is much smaller than the resistance of the discharge circuit 3, the external test power supply will charge the capacitive load circuit 2 first, thereby generating a large surge current; after the capacitive load circuit 2 is charged, the timing driving circuit 1 controls the relay to be tested to be switched off, and at the moment, the capacitive load circuit 2 finishes discharging through the discharging circuit 3; after the capacitive load circuit 2 finishes discharging, the timing driving circuit 1 controls the relay to be tested to be closed again, and the capacitive load circuit 2 is charged again. The method is repeated, so that the surge large current impact and the service life test of the relay to be tested can be realized.
Further, the count on the voltage counter 4 reflects the life of the relay under test. Specifically, in a cycle in which the relay to be tested is closed and then opened, after the voltage of the capacitive load circuit 2 rises first and then falls to 0, the voltage counter 4 counts once based on the voltage change of the capacitive load circuit 2; alternatively, in one cycle in which the relay to be tested is opened and then closed, when the voltage of the capacitive load circuit 2 is first decreased and then increased, the voltage counter 4 counts once based on the voltage change of the capacitive load circuit 2. When the relay to be tested is continuously closed and is not disconnected any more, or is continuously opened and is not closed any more, the voltage of the capacitive load circuit 2 does not change to rise first and then fall or to fall first and then rise, the voltage counter 4 does not count any more, and the relay to be tested is damaged at the moment, so the service life of the relay to be tested can be reflected by the count of the voltage counter 4.
Note that, the timing method of the timing driving circuit 1 according to the embodiment of the present invention is a method commonly used in the prior art, for example: timer timing, etc., which will not be described herein.
In one embodiment, as shown in fig. 2, the timing driving circuit 1 includes: a time relay; the first power supply end of the time relay is connected with the first output end of the external power supply, the second power supply end of the time relay is connected with the second output end of the external power supply, and the first output end of the time relay is connected with the first power supply end of the relay to be tested.
Specifically, the utility model discloses timing drive circuit 1 of embodiment mainly uses time relay as the main, and this time relay is one kind and utilizes electromagnetic principle or mechanical principle to realize time delay control's automatic switch device. When the input action signal is added (or removed), the output circuit of the relay needs to generate jump change (or contact action) after a specified accurate time. The time relay is not limited to a specific type, and may be of an air damping type, an electric type, an electronic type, or the like.
Specifically, the utility model discloses time relay is through timing control quilt survey relay and is got electric for the quilt is surveyed the relay closure, wherein, based on capacitive load circuit 2's the charge time, the closing time of time relay control quilt survey relay, based on capacitive load circuit 2's the discharge time, the off-time of time relay control quilt survey relay.
Further, the utility model discloses timing drive circuit 1 can also the timer combine controllable switch's method control by survey relay timing break-make, specifically, can be connected the first feeder ear of the relay of being surveyed with external power supply's first end through controllable switch, the second feeder ear of the relay of being surveyed is connected with external power supply's second end, controllable switch's control end is connected with the timer, closure through timing control controllable switch, it is closed that control is surveyed the relay and is got the electricity, timing control controllable switch's disconnection, control is surveyed the relay and loses the disconnection of electricity.
In an embodiment, as shown in fig. 2, the timing driving circuit 1 further includes: a reset button S6; the first end and the second end of the reset button S6 are correspondingly connected with the two reset ends of the time relay. When the reset button S6 is pressed, the time relay restarts timing and controls the on-off of the relay to be tested.
In a specific embodiment, the timing driving circuit 1 further includes: a pause button S5; the first end and the second end of the pause button S5 are correspondingly connected with the two pause control ends of the time relay. When the pause button S5 is pressed, the time relay controls the tested relay to be opened, and when the pause button S5 is released, the time relay controls the tested relay to be closed again.
In one embodiment, as shown in fig. 2, the capacitive load circuit 2 includes: at least one capacitive load branch, wherein, when the capacitive load circuit 2 comprises at least two capacitive load branches, all capacitive load branches are connected in parallel; each capacitive load branch is formed by connecting a capacitor and a control switch in series.
In fig. 2, the number of capacitive load branches is 4 branches as an example, but the number is not limited. S1 and C1, S2 and C2, S3 and C3, S4 and C4 respectively form a capacitive load branch. Specifically, when control switch closed, this control switch place capacitive load branch road inserts, based on this, the embodiment of the utility model provides a can be through control switch's break-make, the control is surveyed the maximum load electric current of relay, wherein, maximum load electric current I can be by I = U/Xc, xc =1/2 pi fC, obtains I =2 pi fCU, and wherein U is the voltage of external test power supply, and Xc is capacitive reactance of capacitive load circuit 2, and f is the voltage frequency of test power supply. Therefore, the embodiment of the utility model provides a through the access quantity of control capacitive load branch road, control capacitive load circuit 2's capacitive reactance to control maximum load current.
In one embodiment, as shown in fig. 2, the discharge circuit 3 includes: at least one discharge resistor, R1 and R2 in fig. 2 are discharge resistors, and the number and the resistance value of the discharge resistors may be determined according to the discharge current of the capacitive load circuit 2, which is not limited herein.
In an embodiment, as shown in fig. 2, the relay life testing apparatus further includes: a count clear button S7; the first end and the second end of the count clear button S7 are correspondingly connected to the two clear control ends of the voltage counter 4. When the count clear button S7 is pressed, the voltage counter 4 counts to clear.
In an embodiment, as shown in fig. 2, the relay life testing apparatus further includes: an indicator light 5; the first end of the indicator light 5 is connected with the first end of the relay to be tested through the voltage counter 4, and the second end of the indicator light 5 is connected with the zero line of the external test power supply.
Specifically, after the relay to be tested is closed, the indicator lamp 5 is turned on; when the relay to be tested is disconnected, the indicator lamp 5 is turned off; when the indicator light 5 is normally on, the detected relay is always in a closed state, and the detected relay is damaged; when the indicator light 5 is normally off, the tested relay is always in an off state, and the tested relay is damaged.
Furthermore, the embodiment of the utility model can utilize the buzzer to replace the indicator light, and when the relay to be tested is closed, the buzzer buzzes; when the relay to be tested is disconnected, the buzzer stops buzzing; when the buzzer buzzes all the time, the fact that the relay to be tested is always in a closed state is shown, and the relay to be tested is damaged; when the buzzer does not buzz any more, the fact that the relay to be tested is always in the off state is shown, and the relay to be tested is damaged.
In an embodiment, as shown in fig. 3, the relay life testing apparatus further includes: a circuit breaker 6; the first input end of circuit breaker 6 is connected with external test power supply's live wire, and the second input end of circuit breaker 6 is connected with external test power supply's zero line, and the first output end of circuit breaker 6 is connected with the second end of being surveyed the relay, and the second end of circuit breaker 6 is connected with the second end of pilot lamp, the second end of capacitive load circuit 2.
In an embodiment, as shown in fig. 4, the relay life testing apparatus further includes: a test power supply 7; the first power supply end of the test power supply 7 is connected with the first input end of the circuit breaker, and the second power supply end of the test power supply 7 is connected with the second input end of the circuit breaker.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A relay life testing device, comprising: a timing driving circuit, a capacitive load circuit, a discharge circuit and a voltage counter, wherein,
the two input ends of the timing driving circuit are correspondingly connected with a first output end and a second output end of an external power supply, the first output end of the timing driving circuit is connected with the second output end of the external power supply, the second output end of the timing driving circuit is connected with a first power supply end of a relay to be tested, and the second power supply end of the relay to be tested is connected with the first output end of the external power supply;
the capacitive load circuit is connected with the voltage counter and the discharge circuit in parallel respectively;
the first end of the capacitive load circuit is connected with the first end of the relay to be tested, and the second end of the capacitive load circuit is connected with a zero line of an external test power supply;
and the second end of the tested relay is connected with a live wire of an external test power supply.
2. The relay life test device according to claim 1, wherein the timing driving circuit includes:
a time relay;
the first power supply end of the time relay is connected with the first output end of the external power supply, the second power supply end of the time relay is connected with the second output end of the external power supply, and the first output end of the time relay is connected with the first power supply end of the relay to be tested.
3. The relay life test apparatus according to claim 2, wherein the timing drive circuit further comprises:
a reset button;
and the first end and the second end of the reset button are correspondingly connected with the two reset ends of the time relay.
4. The relay life testing apparatus according to claim 2, wherein the timing driving circuit further comprises:
a pause button;
and the first end and the second end of the pause button are correspondingly connected with the two pause control ends of the time relay.
5. The relay life testing apparatus of claim 1, wherein the capacitive load circuit comprises: at least one capacitive load branch, wherein,
when the capacitive load circuit comprises at least two capacitive load branches, all capacitive load branches are connected in parallel;
each capacitive load branch is formed by connecting a capacitor and a control switch in series.
6. The relay life testing device according to claim 1, wherein the discharge circuit includes: at least one discharge resistor.
7. The relay life testing apparatus according to claim 1, further comprising:
a count zero clearing button;
and the first end and the second end of the counting zero clearing button are correspondingly connected with the two zero clearing control ends of the voltage counter.
8. The relay life testing apparatus according to claim 1, further comprising:
an indicator light;
the first end of the indicator light is connected with the first end of the tested relay through the voltage counter, and the second end of the indicator light is connected with a zero line of the external test power supply.
9. The relay life testing apparatus according to claim 8, further comprising:
a circuit breaker;
the first input end of the circuit breaker is connected with the live wire of the external test power supply, the second input end of the circuit breaker is connected with the zero line of the external test power supply, the first output end of the circuit breaker is connected with the second end of the tested relay, and the second end of the circuit breaker is connected with the second end of the indicator light and the second end of the capacitive load circuit.
10. The relay life testing apparatus according to claim 9, further comprising:
testing the power supply;
the first power supply end of the test power supply is connected with the first input end of the circuit breaker, and the second power supply end of the test power supply is connected with the second input end of the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221470057.4U CN217561667U (en) | 2022-06-10 | 2022-06-10 | Relay life testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221470057.4U CN217561667U (en) | 2022-06-10 | 2022-06-10 | Relay life testing device |
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| Publication Number | Publication Date |
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| CN217561667U true CN217561667U (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221470057.4U Active CN217561667U (en) | 2022-06-10 | 2022-06-10 | Relay life testing device |
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| CN (1) | CN217561667U (en) |
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- 2022-06-10 CN CN202221470057.4U patent/CN217561667U/en active Active
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