Novel insulation switch
By sealing the grounding switch inside an insulating housing and using indicator lights to indicate when it is in operation, the problem of poor contact caused by dust and harmful gases in existing insulating switches is solved, and safe and reliable residual current release is achieved.
Patent Information
- Application Number
- CN202520010237.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-03
AI Technical Summary
The existing grounding switch of the insulated switch is installed in an unsealed distribution cabinet, which allows dust and harmful gases to enter, causing poor contact of the contacts and posing a safety hazard. In addition, improper operation can affect the release of residual current.
All grounding switches of the insulating switch are sealed and installed in an insulating housing, and an indicator light indicates that the operation is in place. The status indication of the operating lever is achieved by the cooperation of a reed switch and a magnet, ensuring that the contacts of the grounding switch and the insulating switch are not affected by oxidation and dust, and preventing poor contact.
It effectively prevents poor contact problems caused by oxidation and dust in the contacts of grounding switches and insulation switches, ensuring that residual current can be safely released after proper operation and reducing safety hazards.
Smart Images
Figure CN223858082U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of switchgear technology, and in particular to a novel insulating switch. Background Technology
[0002] A vacuum arc-extinguishing insulated switch (hereinafter referred to as an insulated switch) is a switching device that uses vacuum as the insulating medium. It is mainly used to disconnect and connect circuits in high-voltage, high-current power systems. Its core component is the vacuum interrupter, also known as a vacuum switch tube or vacuum bulb. Through a pair of electrodes (contacts) sealed in a vacuum and other parts, when current passes through the vacuum interrupter, the electric arc extinguishes itself in the vacuum, thus achieving circuit disconnection and closure. This design allows the vacuum interrupter to quickly extinguish the arc and suppress current after power is cut off, preventing accidents and incidents. In specific operation, when the operator pulls the operating lever outward, the insulated switch stops outputting power; when the operator pushes the operating lever inward, the insulated switch outputs power outward.
[0003] While existing insulating switches meet practical control needs to some extent, their structural limitations also present the following technical problems: Their associated grounding switches (whose main function is to discharge residual current from the load cable to ground when the insulating switch and load are disconnected, reducing the risk of electric shock to maintenance personnel) are installed in unsealed distribution cabinets. This allows dust and harmful gases in the air to enter the grounding switch, the contacts of the insulating switch, and the grounding switch contacts, causing poor contact and adversely affecting the discharge of residual current. This also poses a safety hazard to maintenance personnel. Therefore, providing an insulating switch that effectively ensures residual current discharge to ground is particularly necessary. Utility Model Content
[0004] To overcome the shortcomings of existing insulating switches due to structural limitations, as described in the background, this utility model provides a novel insulating switch in which the matching grounding switch is completely sealed and installed inside an insulating housing. This prevents poor contact between the grounding switch, the insulating switch contacts, and the grounding switch points. Furthermore, after the insulating switch and the grounding switch operating rods are operated to their respective positions, indicator lights can prompt the operator, preventing improper operation from adversely affecting power supply and the release of residual current.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A novel insulating switch includes a vacuum arc-extinguishing insulating switch body with a matching grounding switch, a housing, a battery, a capacitor, a current transformer, a bridge rectifier, and an indicating circuit. The vacuum arc-extinguishing insulating switch body and the grounding switch are respectively installed at the rear end of the housing, and the front end of the housing has at least two guide tubes. The operating rods of the vacuum arc-extinguishing insulating switch body and the grounding switch are respectively located inside the two guide tubes. Fixed handles are respectively installed on the front side of the operating rods of the vacuum arc-extinguishing insulating switch body and the grounding switch. The contacts of the grounding switch are installed at the front inner end of the housing, and the front end of the grounding switch terminal block is electrically connected to the grounding stake. The upper and lower ends of the housing are respectively led-in tubes, and the inlet end of the vacuum arc-extinguishing insulating switch body and the outlet end of the grounding switch are led outward through the upper and lower lead-in tubes, respectively. The vacuum arc-extinguishing insulation switch body's inlet terminal, the grounding switch's outlet terminal, and the inner side of the lead tube are encapsulated with insulating epoxy resin. The indicator circuit has at least one circuit, each equipped with a reed switch and a magnet. Two magnets are respectively installed at one end of the operating rod of the vacuum arc-extinguishing insulation switch body and one end of the operating rod of the grounding switch. Two reed switches are respectively installed outside the front end of the vacuum arc-extinguishing chamber and inside the front end of the outer casing of the vacuum arc-extinguishing insulation switch body. The battery, capacitor, current transformer, indicator circuit, and bridge rectifier are installed inside the outer casing. One contact arm of the grounding switch has its inlet terminal passing through the center hole of the current transformer. The power output terminal of the current transformer is electrically connected to the power input terminal of the bridge rectifier, and the power output terminal of the bridge rectifier is electrically connected to both ends of the capacitor and the power input terminals of the two indicator circuits.
[0007] Furthermore, the moving contacts of the first reed switch and the second reed switch are located at the rear and front, respectively, and the reed switches are normally open contact reed switches.
[0008] Furthermore, when the operating rod of the vacuum arc-extinguishing insulation switch body is in the rear stop position and the operating rod of the grounding switch is in the front stop position, the magnetic force of the two permanent magnet plates acts on the two reed switches respectively, and the internal contacts of the two reed switches close.
[0009] Furthermore, the indicator circuit includes an electrically connected resistor and a light-emitting diode, and is connected to a reed switch. One end of the reed switch is connected to one end of the resistor, and the other end of the resistor is connected to the positive terminal of the light-emitting diode.
[0010] Furthermore, a sealing tube is installed inside the guide tube, and the vacuum arc-extinguishing insulation switch body, the operating rod of the grounding switch, and the inner side of the guide tube are in a sealed sliding contact structure.
[0011] The utility model has the advantages that compared with the prior art, the utility model is based on the insulation switch body, and all the matched grounding switches are sealedly installed in the insulation shell, so that the contacts of the grounding switches and the insulation switches and the grounding switch contacts are prevented from being affected by oxidation and dust and from causing poor contact; in actual application, after the staff respectively operates the insulation switch and the grounding switch operating rods to be in place and closed, the staff can be respectively prompted by the indicator lights, and the adverse effects of operation out of place on power supply and release of residual current are prevented. BRIEF DESCRIPTION OF DRAWINGS
[0012] The utility model will be further explained in connection with the drawings and examples.
[0013] Figure 1 Is the whole section structure schematic diagram of the utility model.
[0014] Figure 2 Is the circuit diagram of the utility model.
[0015] Figure 3 Is the actual product diagram of the utility model. DETAILED DESCRIPTION
[0016] Figure 1 、 2As shown in the figure, a new type of insulation switch includes a vacuum arc-extinguishing insulation switch body 2 with a matching ground switch 1, a shell 3, a battery G1, a capacitor C1, a current transformer M, a bridge W1, and an indicating circuit 6; the vacuum arc-extinguishing insulation switch body 2 is longitudinally installed in the middle of the upper end of the shell 3, the ground switch 1 is longitudinally installed in the middle of the lower end of the shell 3, and the middle of the front end of the shell 3 has two guide tubes 31 spaced apart from top to bottom; the operating rods of the vacuum arc-extinguishing insulation switch body 2 and the ground switch 3 are respectively located in the upper end and lower end guide tubes 31, and the front ends of the operating rods of the vacuum arc-extinguishing insulation switch body 1 and the ground switch 2 are respectively installed with a fixed handle 4 (for easy operation), the middle of the front end of the shell is transversely distributed with an opening, the three contacts 101 of the ground switch are sealingly installed in the opening, and the front end of the terminal block 102 of the ground switch is located outside the end of the shell 3, and the front ends of the three terminal blocks 102 and three ground stakes (not shown in the figure, inserted below the ground) are connected through wires; the middle of the upper end and the middle of the lower end of the shell 3 are respectively provided with a lead tube 32 communicating with the inside thereof, the incoming line end of the vacuum arc-extinguishing insulation switch body 2 and the outgoing line end of the ground switch 1 are respectively led out through the upper end and lower end lead tubes 32, and the inside of the lead tube 32 between the incoming line end of the vacuum arc-extinguishing insulation switch body 2 and the outgoing line end of the ground switch 1 is filled with insulating epoxy resin 5 (for sealing and insulating); the indicating circuit 1 has three paths, each path of the indicating circuit 1 is matched with a dry reed tube GH1 (GH2) and a magnet CT1 (CT2), the two magnets CT1 and CT2 are respectively adhered to the middle of the lower end of the operating rod 21 of the vacuum arc-extinguishing insulation switch body and the middle of the lower end of the operating rod 104 of the ground switch, and the two dry reed tubes GH1 and GH2 are respectively fixedly installed at the front lower end outside of the vacuum arc-extinguishing chamber of the vacuum arc-extinguishing insulation switch body 2 and the middle of the front lower end of the shell 3; the battery G1, the capacitor C1, the current transformer M, the indicating circuit 6, and the bridge W1 are installed on the circuit board at the front lower end of the shell 3.
[0017] Figure 1 、 2As shown in the figure, the movable contact of the two dry reed switches GH1 and GH2 are located at the rear and front respectively, and the dry reed switches GH1 and GH2 are normally open contact dry reed switches. When the operating rod of the vacuum arc-extinguishing insulation switch body 2 and the grounding switch 1 are located at the rear and front dead point state respectively (the vacuum arc-extinguishing insulation switch body is closed, and the contact arm and the contact of the grounding switch are closed), the rear end and the front end of the two permanent magnet pieces CT1 and CT2 are located at the front and rear outer side end of the two dry reed switches GH1 and GH2 respectively, and the internal contact of the two dry reed switches GH1 and GH2 is closed. The first indicating circuit includes the resistance R1 and the light-emitting diode VL1 connected by the circuit board wiring, and is connected with the dry reed switch GH1 by the wire, one end of the dry reed switch GH1 is connected with one end of the resistance R1, and the other end of the resistance R1 is connected with the positive electrode of the light-emitting diode VL1; the second indicating circuit includes the resistance R2 and the light-emitting diode VL2 connected by the circuit board wiring, and is connected with the dry reed switch GH2 by the wire, one end of the dry reed switch GH2 is connected with one end of the resistance R2, and the other end of the resistance R2 is connected with the positive electrode of the light-emitting diode VL2; the light-emitting surface of the light-emitting diodes VL1 and VL2 of the two indicating circuits are located outside the two holes at the front end of the shell 3 respectively. The inner side of the guide pipe is tightly sleeved with a sealing rubber pipe 7, and the operating rod of the vacuum arc-extinguishing insulation switch body, the grounding switch and the inner side of the guide rubber pipe 7 are in a sealed sliding contact structure. One of the contact arms (with the contact at the upper end) of the grounding switch 1 passes through the center hole of the current transformer M; the power output terminals 3 and 4 of the current transformer M and the power input terminals 1 and 2 of the bridge W1 are connected by wires respectively, the power output terminals 3 and 4 of the bridge W1 and the two ends of the capacitor C1, the power input terminals of the two indicating circuits, the other end of the dry reed switch GH1 and GH2 and the negative electrode power input terminals of the light-emitting diodes VL1 and VL2 are connected by wires.
[0018] Figure 1 、 2 As shown in the figure, the new type is based on the insulation switch body 2, and the grounding switch 1 matched with the insulation switch body 2 is completely sealed and installed in the insulation shell 3, so that the contact of the grounding switch 1 and the contact of the insulation switch 2 are prevented from being affected by oxidation and dust, and the problem of poor contact caused by the oxidation and dust is solved. In practical application, after the operating rod 21 of the insulation switch body 2 is pushed to the rear position, the internal contact of the insulation switch body 2 is closed to supply power to the electrical load, and after the operating rod 21 of the insulation switch body 2 is pulled to the front position, the internal contact of the insulation switch body 2 is opened to stop supplying power to the electrical load. After the operating rod of the grounding switch 1 is pushed to the rear position, the upper contacts of the three contact arms of the grounding switch are closed with the three contacts of the insulation switch body respectively, and the insulation switch body can supply power to the electrical load; after the operating rod of the grounding switch 1 is pulled to the front position, the upper contacts of the three contact arms of the grounding switch are in contact with the upper end of the three contacts 101 respectively, so that after the total input power is turned off, the residual current is discharged to the ground, and the safety hazard of the residual current to the workers is prevented.
[0019] Figure 1 、 2 As shown in the figure, when the phase line flows through the current during the normal power supply of the insulation switch body 2, the secondary side of the current transformer M outputs about 6V AC power to the power input end of the bridge W1, the 3, 4 feet of the bridge W1 output DC power through the capacitor C1 to charge the battery G1, and the battery G1 supplies power to the indicating circuit. Thus, the new type does not need external power line and charger, and is more convenient to use. When the operating rod of the insulation switch body is pushed to the rear, the magnet CT1 approaches the reed tube GH1, the internal contact of the reed tube GH1 is closed, the power output by the battery G1 is reduced through the resistor R1 and then flows into the positive power input end of the light emitting diode VL1, so that the light emitting diode VL1 is electrified to emit light and prompt the operating rod of the insulation switch body to be operated to the position, and the insulation switch body outputs power to the outside. When the operating rod of the grounding switch is pulled to the front, the magnet CT1 approaches the reed tube GH2, the internal contact of the reed tube GH2 is closed, so that the power output by the battery G1 is reduced through the resistor R2 and then flows into the positive power input end of the light emitting diode VL2, so that the light emitting diode VL2 is electrified to emit light and prompt the operating rod of the grounding switch to be operated to the position, and the grounding switch releases the remaining current to the ground. The adverse effects of the operation not to the position on the power supply and the release of the remaining current are prevented. Figure 2 In the embodiment, the resistance R1 and R2 are 500Ω respectively; the light emitting diodes VL1 and VL2 are red light emitting diodes; the battery G1 is 6V / 10Ah; the capacitor C1 is 470μF / 25V; the bridge W1 is KBP301; and the current transformer M is DL-CT1005A. The vacuum arc-extinguishing insulation switch body and the grounding switch are the existing basis, and the working principle thereof is not described herein.
[0020] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and it is obvious for those skilled in the art that the utility model is limited to the details of the above-described exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.
[0021] Furthermore, it should be understood that, although the specification is described in terms of embodiments, the embodiments do not include only singular implementations, but that the specification can include plural implementations of individual systems, other combined systems, and methods described herein.
Claims
1. A new type of insulated switch comprising a vacuum arc-extinguishing insulated switch body with a matching ground switch, a housing, a battery, a capacitor, a current transformer, a bridge stack, characterized in that, The vacuum arc-extinguishing insulated switch body and the grounding switch are respectively installed at the rear end of the shell, and the front end of the shell has at least two guide tubes; the operating rods of the vacuum arc-extinguishing insulated switch body and the grounding switch are respectively located in the two guide tubes, and fixed handles are respectively installed on the front sides of the operating rods of the vacuum arc-extinguishing insulated switch body and the grounding switch; the contact of the grounding switch is installed at the front inner end of the shell, and the front end of the wiring seat of the grounding switch is electrically connected with the grounding stake; the upper end and the lower end of the shell are respectively provided with lead-out tubes, the incoming line end of the vacuum arc-extinguishing insulated switch body and the outgoing line end of the grounding switch are respectively led out through the upper end and the lower end lead-out tubes, and the incoming line end of the vacuum arc-extinguishing insulated switch body and the outgoing line end of the grounding switch are filled with insulating epoxy resin between the inner sides of the lead-out tubes; the indicating circuit has at least two paths, each path of the indicating circuit is matched with a reed tube and a magnet, the two magnets are respectively installed at one end of the operating rods of the vacuum arc-extinguishing insulated switch body and the grounding switch, and the two reed tubes are respectively installed at the front end outside of the vacuum arc-extinguishing chamber of the vacuum arc-extinguishing insulated switch body and the front end inside of the shell; the battery, the capacitor, the current transformer, the indicating circuit and the bridge are installed in the shell, one of the contact arms of the grounding switch passes through the center hole of the current transformer; the power output end of the current transformer is electrically connected with the power input end of the bridge, the power output end of the bridge is electrically connected with the capacitor and the power input end of the two paths of the indicating circuit.
2. A novel insulated switch as claimed in claim 1, wherein, The moving contacts of the first reed tube and the second reed tube are respectively located at the rear part and the front part, and the reed tube is a normally open contact reed tube.
3. A novel insulated switch as claimed in claim 1, wherein, When the operating rod of the vacuum arc-extinguishing insulated switch body is located at the rear dead point state and the operating rod of the grounding switch is located at the front dead point state, the magnetic forces of the two permanent magnets act on the two reed tubes respectively, and the internal contacts of the two reed tubes are closed.
4. A novel insulated switch as claimed in claim 1, wherein, The indicating circuit comprises a resistance and a light-emitting diode which are electrically connected and connected with the reed tube, one end of the reed tube is connected with one end of the resistance, and the other end of the resistance is connected with the anode of the light-emitting diode.
5. A novel insulated switch as claimed in claim 1, wherein, The inner sides of the guide tubes are provided with sealing rubber tubes, and the operating rods of the vacuum arc-extinguishing insulated switch body and the grounding switch are in sealed sliding contact structure with the inner sides of the guide rubber tubes.