CN219695278U - Detection device for auxiliary switch node and switch equipment - Google Patents

Abstract

The utility model relates to a detection device of a switch auxiliary node and switch equipment. The detection device of the auxiliary switch node comprises a node series connection module, a voltage dividing element and voltage detection equipment; at least two closed auxiliary nodes of the switches connected in series are connected between the first end and the second end of the node serial module, the first end of the node serial module is connected with the first end of the voltage dividing element, and the second end of the node serial module is connected with the second end of the voltage dividing element; the voltage detection device is connected with the first end and the second end of the voltage division element and detects voltages at two ends of the voltage division element. The detection device adopting the switch auxiliary node can finish the detection of a plurality of closed auxiliary nodes by one-time operation, and has high detection efficiency.

Description

Detection device for auxiliary switch node and switch equipment

Technical Field

The present utility model relates to the technical field of electrical devices, and in particular, to a detection apparatus for a switch auxiliary node and a switch device.

Background

Auxiliary nodes matched with the opening and closing of the electrical switching equipment are used for reflecting the state of the switch and carrying out on-site display/remote logic operation and control of the switch. If the auxiliary node is in abnormal contact, the display of the switch equipment is affected slightly, and the switching on/off of the switch equipment is affected heavily, so that faults such as misoperation or refusal are caused, and therefore, the reliability of the auxiliary node needs to be detected regularly.

At present, the auxiliary node detection is to measure the direct current resistance of the auxiliary node through a universal meter, and if the measured resistance value is larger, the auxiliary node is judged to be abnormal. However, one switch device is provided with a plurality of groups of auxiliary nodes, and the method is characterized in that a worker holds a multimeter to detect one by one, and the whole detection process is long in time consumption and low in efficiency.

Disclosure of Invention

Based on this, it is necessary to provide a detection device and a switching device for switching an auxiliary node in order to solve the problem of low detection efficiency of the auxiliary node.

A detection apparatus for a switch auxiliary node, comprising: the node series module, the voltage dividing element and the voltage detection equipment;

at least two closed auxiliary nodes of switches connected in series are connected between the first end and the second end of the node series connection module, the first end of the node series connection module is connected with the first end of the voltage dividing element, and the second end of the node series connection module is connected with the second end of the voltage dividing element; the voltage detection device is connected with the first end and the second end of the voltage division element and detects voltages at two ends of the voltage division element.

In one embodiment, the node concatenation module includes a first connector and at least one lead;

each pin of the first connector is used for being correspondingly connected with two ends of each closing auxiliary node;

each lead wire is connected with two pins of the first connector, and in the first connector, at least two pins of two serially connected closing auxiliary nodes are connected as a first end and a second end of the node serial module.

In one embodiment, the first connector is an aerial plug.

In one embodiment, the detection device further comprises a vibration module for driving the closure assistance node to vibrate.

In one embodiment, the detection device of the auxiliary switch node further comprises an air switch, and the voltage dividing element is connected with a power supply through the air switch.

In one embodiment, the detection device of the auxiliary switch node further includes a detection base, where the detection base is provided with a first detection terminal seat and a second detection terminal seat, and the first detection terminal seat and the second detection terminal seat are respectively connected with the first end and the second end of the voltage dividing element; the first detection terminal seat and the second detection terminal seat are both connected with the voltage detection equipment.

In one embodiment, the voltage detection device is an oscilloscope.

A switching device comprises a switch and a detection means of a switch auxiliary node as described above.

In one embodiment, the switch comprises a second connector and an auxiliary node, and the detection device of the auxiliary node of the switch is connected with the auxiliary node through the second connector.

The detection device and the switch equipment of the switch auxiliary node comprise: the node series module, the voltage dividing element and the voltage detection equipment; at least two closed auxiliary nodes of the switches connected in series are connected between the first end and the second end of the node serial module, the first end of the node serial module is connected with the first end of the voltage dividing element, and the second end of the node serial module is connected with the second end of the voltage dividing element; the voltage detection device is connected with the first end and the second end of the voltage division element and detects voltages at two ends of the voltage division element. The to-be-detected closed auxiliary nodes in the switch are connected between the first end and the second end of the node series connection module, so that series connection of a plurality of closed auxiliary nodes is realized, whether abnormal nodes exist in the series connection closed auxiliary nodes or not is judged through the voltage at the two ends of the voltage dividing element detected by the voltage detection equipment, if the voltage at the two ends of the voltage dividing element is normal, the detected closed auxiliary nodes are normal, and if the voltage at the two ends of the voltage dividing element is abnormal, the abnormal closed auxiliary nodes can be determined. Therefore, the detection of a plurality of closed auxiliary nodes can be completed by one operation, and the detection efficiency is remarkably improved.

Drawings

FIG. 1 is a schematic diagram of a detection device for a switch auxiliary node in an embodiment;

FIG. 2 is a schematic diagram of a detection device for a switch auxiliary node according to another embodiment;

FIG. 3 is a schematic circuit diagram of a detection device of a switch auxiliary node in an embodiment;

FIG. 4 is a block diagram of a switching device in one embodiment;

fig. 5 is a schematic block diagram of a switching device according to another embodiment.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the utility model. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In one embodiment, a detection apparatus 100 for a switch auxiliary node is provided for detecting an auxiliary node in a switch 200. Types of switches 200 may include, but are not limited to, circuit breakers, contactors, emergency diesel inlet switches, service power switches, auxiliary power switches, and the like. Switch 200 includes a plurality of closed auxiliary nodes and open auxiliary nodes. Under the normal state, the closed auxiliary node is in a closed state, and the resistance value of the closed auxiliary node is zero or a tiny value close to zero; the disconnection auxiliary node is in a disconnection state, and the resistance value is very large. When an abnormality occurs, the closed auxiliary node is in an open state, and the resistance value is no longer zero; the open auxiliary node exhibits a closed state with a resistance value of zero. At present, when an abnormality of a certain auxiliary node is detected, all (or all the same type) auxiliary nodes are replaced, so that the switch 200 is recovered for use as soon as possible, and then all the replaced auxiliary nodes are subjected to fault removal and maintenance.

As shown in fig. 1, the detection apparatus 100 for a switch auxiliary node includes a node series module 110, a voltage dividing element 120, and a voltage detection device 130. At least two closed auxiliary nodes of the switches 200 connected in series are connected between the first end and the second end of the node serial module 110, the first end of the node serial module 110 is connected with the first end of the voltage dividing element 120, and the second end of the node serial module 110 is connected with the second end of the voltage dividing element 120. The voltage detection device 130 is connected to the first end and the second end of the voltage division element 120, and is used for detecting the voltage across the voltage division element 120.

The voltage dividing element 120 may be used in combination with a component with a fixed resistance value, such as a resistor or a coil of a relay, which is required to be selected from a test environment. The voltage detection device 130 may be an oscilloscope, a voltmeter, or the like that can be used to detect a voltage.

The node concatenation module 110 may be connected to each auxiliary node of the switch 200 to draw each auxiliary node out of the switch 200. When two or more auxiliary nodes are connected, the respective auxiliary nodes can be connected in series outside the switch 100.

In the embodiment shown in fig. 1, each pin (pins J1-Jn) of the node-series module 110 is connected to two ends of n/2 auxiliary nodes, and after the connection ends of the auxiliary nodes are led out from the switch 200, the node-series module 110 realizes the series connection of the auxiliary nodes. The first end and the second end of the node serial module 110 are the pin J1 and the pin Jn, respectively, and the pin J1 may be used as the first end and the pin Jn may be used as the second end, or the pin Jn may be used as the first end and the pin J1 may be used as the second end.

It will be appreciated that in the embodiment shown in fig. 1, the number of pins of the node concatenation module 110 corresponds to the number of endpoints of the auxiliary nodes in the switch 200. In actual design, the number of pins of the node-series module 110 may be greater than the number of endpoints of the auxiliary nodes in the switch 200. The auxiliary node connected between the first end and the second end of the node concatenation module 110 is an auxiliary node to be detected. In one detection operation, all or part of the closed auxiliary nodes in the switch 200 may be detected.

When the to-be-detected closing assistance in the switch 200 needs to be detected, the node series module 110 is first connected with each to-be-detected closing assistance node, so as to realize the series connection of each closing assistance node. And then the electric energy is connected to enable stable current to flow through the voltage dividing element 120 and each closed auxiliary node after being connected in series. Since the resistance of the voltage dividing element 120 is determined, it is possible to determine the normal voltage across the voltage dividing element 120 when all the closed auxiliary nodes are normal. Therefore, if the voltage value detected by the voltage detection device 130 is equal to the normal voltage or the difference value is within an acceptable error range, it may be determined that the detected closed auxiliary nodes are all normal; if the voltage value detected by the voltage detection device 130 is greater than the normal voltage, it may be determined that an abnormal node exists in the detected closed auxiliary node.

It should be further noted that a plurality of disconnection assistance nodes may be further connected between the first end and the second end of the node concatenation module 110, so as to connect the plurality of disconnection assistance nodes in series. The detection device 100 of the switching auxiliary node can detect whether or not all the disconnection auxiliary nodes connected in series are abnormal.

Only one closed auxiliary node or open auxiliary node can be connected between the first end and the second end of the node concatenation module 110, and the auxiliary node can be detected separately.

In the above detection device 100 for auxiliary nodes of a switch, the node series connection module 110 is provided to connect the auxiliary nodes to be detected in the switch 200 in series, and the voltage at the two ends of the voltage division element 120 detected by the voltage detection device 130 is used to determine whether there is an abnormal node in the auxiliary nodes connected in series, if the voltage at the two ends of the voltage division element 120 is normal, it is indicated that each detected auxiliary node is normal, and if the voltage at the two ends of the voltage division element 120 is abnormal, it is determined that there is an abnormal auxiliary node. Therefore, the detection of a plurality of closed auxiliary nodes to be detected can be completed by one operation, and the detection efficiency is obviously improved.

Further, when fault processing is performed based on the detection result, whether the wire pressing of each connecting terminal is firm or not can be checked, whether the size of the connecting nose is bigger or not, a certain movable space still exists after plugging, and finally whether the internal structure of the auxiliary node is broken or not is checked, and the pressing force of the pressing mechanism is insufficient. Processing according to the fault phenomenon, ensuring reliable nodes, stable waveforms and no fluctuation.

In one embodiment, the node-series module 110 includes a first connector 111 and at least one lead 112. Each pin of the first connector 111 is used for being correspondingly connected with two ends of each closing auxiliary node; each lead 112 connects two pins of the first connector 111, and at least two pins of two serially connected closing auxiliary nodes are connected in the first connector 111 as a first end and a second end of the node concatenation module 110.

As shown in fig. 1, the first connector 111 includes pins J1 to Jn, each of which is connected to two ends of the closing auxiliary node of the switch 200, respectively, and both ends of each of the closing auxiliary nodes are led out of the switch 200. Meanwhile, each lead 112 is correspondingly connected to two pins of the first connector 111, so that the respective closing auxiliary nodes are connected in series.

When the detection is needed, pins connected with two ends of the to-be-detected closed auxiliary joint are used as a first end and a second end of the node series connection module 110, for example, closed auxiliary nodes connected with the pin J1 and the pin J2, and when the closed auxiliary nodes connected with the pin J3 and the pin J4 are to-be-detected joints, two auxiliary nodes connected in series are included between the pin J1 and the pin J4, and then the pin J1 and the pin J4 are used as the first end and the second end of the node series connection module 110.

It will be appreciated that when a closed auxiliary node is detected, two pins connected to both ends of the closed auxiliary node serve as the first and second ends of the node concatenation module 110.

Further, the number of the leads 112 may be plural, and the first connector 111 and the plurality of leads 112 may be integrally designed as a special test plug, which is convenient for installation and storage.

Further, the plurality of leads 112 may be detachably connected to the pins of the first connector 111, and in the testing process, the connection is performed by a tester as required, so that the connection relationship between the closed auxiliary nodes can be flexibly adjusted, and the use flexibility of the detecting device is improved.

In one embodiment, the first connector 111 is an aerial plug. Because aviation plug has characteristics such as connection is firm, signal transmission is stable, can ensure the detection accuracy in the testing process.

In one embodiment, the detection device 100 further comprises a vibration module for driving the closure assistance node to be detected to vibrate. It should be noted that, the conventional detection method only can reflect the static condition of the auxiliary node, and if the internal mechanism or wiring of the auxiliary node of the switch 200 is not firm, the abnormality cannot be found during the static measurement. In the normal operation process, the vibration of the switch 200 under the action of electric force may cause the instant poor contact of the auxiliary node, at this time, an alarm is triggered or the switch 200 is in misoperation/data movement, and the problem cannot be found by performing static auxiliary node direct current resistance measurement again after the switch 200 is stopped (for example, a 10kV breaker of an energy storage power plant).

Therefore, in order to ensure the comprehensiveness of the detection, the detection device 100 further includes a vibration module, so that each auxiliary node to be detected is in a vibration state. The voltage detection device 130 monitors whether the voltage waveform at both ends of the voltage dividing element 120 has jitter during the vibration of the auxiliary node, and if so, indicates that an abnormal node exists. At this time, in order to ensure the detection reliability, the voltage detection device 130 may select a detection device with a higher sampling rate, such as an oscilloscope, and the sampling rate of the oscilloscope should be set to be higher, for example, not lower than 1KSa/s (1000 points are sampled per second) so as to collect more comprehensive data.

It will be appreciated that in other detection scenarios, a tool such as a screwdriver may be used to strike the auxiliary node body of the switch 200 to be in a vibrating state. And the oscillograph is used for monitoring whether the voltage waveforms at the two ends of the voltage dividing element 120 shake or not in the knocking process, so that the detection comprehensiveness can be ensured.

In one embodiment, the detection device 100 further includes a power source, which is connected to the voltage dividing element 120. The power supply is used for providing stable electric energy for the detection circuit in the detection process. The power supply can be a direct current power supply, and the size of the power supply can be selected according to actual test requirements, for example, the power supply is a 125V direct current power supply. The specific connection is not limited, for example, the voltage dividing element 120 is connected to the first end of the node series module 110 through a power supply, or the voltage dividing element 120 is connected to the second end of the node series module 110 through a power supply.

In one embodiment, the detection device 100 further includes an air switch, through which the voltage dividing element 120 is connected to a power source.

An air switch, also called an air circuit breaker, is a switch which automatically opens whenever the current in the circuit exceeds the rated current, and opens the circuit if a short circuit or the like occurs. In this embodiment, by providing the air switch in the detection device 100, the use safety of the detection device can be improved, and the detection safety can be further ensured.

In one embodiment, the detection device 100 further includes a detection base, where the detection base is provided with a first detection terminal seat and a second detection terminal seat, and the first detection terminal seat and the second detection terminal seat are respectively connected to a first end and a second end of the voltage dividing element 120; the first detection terminal block and the second detection terminal block are also respectively used for connecting the voltage detection device 130.

The detection base in this embodiment facilitates the installation and fixation of the voltage dividing element 120 on the one hand, and the connection of the voltage detecting device 130 on the other hand. Still taking the voltage detection device 130 as an oscilloscope, two test probes of the oscilloscope need to be connected to two ends of the voltage dividing element 120 during the detection process. Through setting up first detection terminal seat and second detection terminal seat, two test probes of oscilloscope are fixed in corresponding detection terminal seat, can be connected with the both ends of bleeder element 120, need not the tester and hold, convenient operation. Wherein, the material, shape and structure of the detection base are not limited.

For a better understanding of the above embodiments, the following detailed explanation is made in connection with a specific embodiment. In one embodiment, the detection device 100 for auxiliary nodes of the switch is a device capable of connecting auxiliary nodes of the switch 200 in series, and rapidly checking whether abnormal nodes exist in all closed auxiliary nodes by monitoring voltages. Specifically, the detection device 100 for a switching auxiliary node includes a node concatenation device 110, a voltage dividing element 120, and a voltage detection apparatus 130. Referring to fig. 2, in the detection device 100 of the auxiliary switch node, the node serial device 110 is a dedicated test plug integrated with a first connector and a plurality of leads 112. The voltage dividing element 120 employs a coil of a 125V relay. Correspondingly, the detection base can adopt a base special for the relay, and the detection terminal base A and the detection terminal base B of the base special for the relay are respectively used as a first detection terminal base and a second detection terminal base of the detection base. The power supply adopts a 125V direct current power supply. The voltage detection device 130 employs an oscilloscope.

During detection, a special test plug is used for leading out the auxiliary node of the switch 200 and connecting normally closed auxiliary nodes in series. One of two outgoing lines (corresponding to the first end and the second end) of the special test plug is inserted into a detection terminal seat A of the special base of the relay, and the other outgoing line is connected with the anode of the 125V direct current power supply. The negative pole of 125V DC power supply inserts the detection terminal seat B of the special base of relay through the air switch (not shown). Two detection probes of the oscilloscope are inserted into two detection terminal seats.

For a specific circuit, referring to fig. 3, each of the closing auxiliary nodes (illustrated as node K1, node K2, node K3, and node K4) in the switch 200 is correspondingly connected to each pin of the dedicated test plug, and each of the closing auxiliary nodes is connected to each of the pins 20, 21, 24, 25, 28, 29, 32, and 33 of the dedicated test plug. The pin 21 is connected to the detection terminal base B, and the detection terminal base A is connected to the anode of the 125V direct current power supply through an air switch. Pin 20 is connected to pin 24 through a lead, pin 25 is connected to pin 29 through a lead, pin 28 is connected to pin 32 through a lead, and pin 33 is connected to the negative pole of the 125V dc power supply through an air switch, so as to realize the serial connection of the closed auxiliary nodes. And then vibrating all the closed auxiliary nodes, and monitoring and detecting the voltages at the two ends of the terminal seat A and the terminal seat B through an oscilloscope, namely, the voltages at the two ends of the relay coil, so that the dynamic detection of all the closed auxiliary nodes is realized, the reliability of each node is ensured, and the accidental poor contact of the nodes is avoided.

The detection device for the auxiliary nodes of the switch can complete detection and detection of all the closed auxiliary nodes which need to be detected in the switch by one-time operation, and has high detection efficiency. Through making auxiliary node be in vibration state in the testing process, can detect the hidden danger that can't discover when static detection, improve the reliability of detection, in time discover the hidden danger of switch, avoid causing malfunction or refusing to move the trouble such as.

In one embodiment, as shown in fig. 4, a switching device is provided, including a switch 200 and a detection device 100 for a switch auxiliary node, where the detection device 100 for a switch auxiliary node is used for detecting an auxiliary node in the switch, and the structure of the detection device 100 for a switch auxiliary node may be set with reference to the above embodiments, which is not repeated.

In one embodiment, as shown in fig. 5, the switch 200 includes a second connector 210 and an auxiliary node 220, and the detection device 100 of the switch auxiliary node is connected to the auxiliary node 220 through the second connector 210.

Specifically, the number of the auxiliary nodes 220 may be plural, and each pin of the second connector 210 is correspondingly connected to each end of each auxiliary node 220, so that each end of each auxiliary node 220 is led out to a position where the detection device 100 for switching the auxiliary node is connected, thereby facilitating detection.

In one embodiment, each pin of the first connector 111 in the detection device 100 of the auxiliary node of the switch is used for each pin of the second connector 210 correspondingly connected to the switch 200, so that two ends of each auxiliary node to be detected are led out of the switch 200 through the second connector 210. In the detection, the first connector 111 and the second connector 210 may be connected to each other. Wherein, each pin of the second connector 210 may be correspondingly connected to both ends of all the auxiliary nodes 220 in the switch 200, so as to lead all the auxiliary nodes 220 out of the switch 200. When the connector is led out, each pin of the second connector 210 corresponds to two ends of each auxiliary node 210 in a fixed sequence, and each pin of the first connector 111 corresponds to each pin of the second connector in a sequence, so that the auxiliary nodes 220 can be connected in series when the two connectors are in butt joint, and further the dynamic conditions of a plurality of closed auxiliary nodes can be monitored once.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (9)

1. A detection apparatus for a switching auxiliary node, comprising: the node series module, the voltage dividing element and the voltage detection equipment;

at least two closed auxiliary nodes of switches connected in series are connected between the first end and the second end of the node series connection module, the first end of the node series connection module is connected with the first end of the voltage dividing element, and the second end of the node series connection module is connected with the second end of the voltage dividing element; the voltage detection device is connected with the first end and the second end of the voltage division element and detects voltages at two ends of the voltage division element.

2. The device for detecting a switching auxiliary node according to claim 1, wherein the node concatenation module includes a first connector and at least one lead;

each pin of the first connector is used for being correspondingly connected with two ends of each closing auxiliary node;

each lead wire is connected with two pins of the first connector, and in the first connector, at least two pins of two serially connected closing auxiliary nodes are connected and serve as a first end and a second end of the node serial connection module.

3. The device for detecting a switching auxiliary node according to claim 2, wherein the first connector is an aviation plug.

4. A detection arrangement for a switching aid node according to any of claims 1-3, characterized in that the detection arrangement further comprises a vibration module for driving the closing aid node in vibration.

5. The device for detecting a switching aid node according to claim 1, further comprising an air switch, wherein the voltage dividing element is connected to a power supply via the air switch.

6. The detection device of a switch auxiliary node according to claim 1, further comprising a detection base provided with a first detection terminal block and a second detection terminal block, the first detection terminal block and the second detection terminal block being connected to a first end and a second end of the voltage dividing element, respectively; the first detection terminal seat and the second detection terminal seat are both connected with the voltage detection equipment.

7. The apparatus for detecting a switching auxiliary node according to claim 1, wherein the voltage detecting device is an oscilloscope.

8. A switching device comprising a switch and a detection means of a switching auxiliary node according to any of claims 1-7.

9. The switching device according to claim 8, wherein the switch comprises a second connector and an auxiliary node, the detection means of the switch auxiliary node being connected to the auxiliary node via the second connector.