A magnetic induction double-confirmation device for isolating switch and isolating switch

Abstract

This utility model provides a magnetic induction dual-confirmation device for disconnecting switches and a disconnecting switch, belonging to the field of intelligent detection technology for high-voltage electrical switchgear. It includes an induction box mounted on an induction box tray, with reed switches installed at both the open and closed positions inside the induction box. A magnet is mounted on the outside of the induction box and installed on the equipment's crank arm. When the switch is closed or opened, the crank arm moves the magnet, triggering the reed switch sensor. The beneficial effect of this utility model is that the closing action moves the crank arm, which in turn moves the magnet, causing one end of the magnet to reach the reed switch sensor position at the open or closed position. The magnetic force of the magnet triggers the reed switch sensor to send a signal to the control room, allowing staff to confirm the closed status without needing to go to the site. This also avoids errors in judging the closed status, resulting in good overall performance.

Description

Technical Field

[0001] This utility model belongs to the field of intelligent detection technology for electrical high-voltage switchgear, specifically relating to a magnetic induction dual-confirmation device for disconnecting switches and a disconnecting switch. Background Technology

[0002] The disconnecting switch has the following functions: 1) Status monitoring and feedback, which can monitor the opening and closing status of the disconnecting switch in real time and accurately. When the disconnecting switch is operated, the magnetic steel component in the magnetic induction device moves with the knife switch crank arm. The magnetic induction device senses the change in magnetic field and converts the magnetic signal into an electrical signal, sending an opening or closing signal, so that the operator can remotely understand the actual status of the disconnecting switch in the control room; 2) Realize "one-button sequential control" and intelligent operation. It is a key component of the "one-click sequential control" technology in substations. After the operator clicks the "one-click sequential control" command on the computer, the system automatically completes the state transition of primary equipment such as disconnect switches based on the signal feedback from the magnetic induction sensor, reducing manual operation steps, improving operational efficiency and accuracy, and promoting the development of substations towards intelligence; 3) Improve operational safety and prevent misoperation. When performing switching operations, the magnetic induction device accurately judges the position status of the disconnect switch and interlocks it with the operation logic of other equipment to ensure that other related operations can only be performed when the disconnect switch is in the correct position, avoiding serious accidents such as load-bearing disconnection or accidental closing caused by incorrect disconnect switch position, and ensuring the safety of the power system and operators; 4) Fault diagnosis and early warning. It helps to discover potential faults in the disconnect switch in a timely manner. If the signal feedback from the magnetic induction device does not match the actual operation command, or if an abnormal signal occurs, it can quickly determine that the disconnect switch may have problems such as incomplete opening and closing, mechanical jamming, or poor electrical connection, and issue an early warning in advance, so that maintenance personnel can carry out timely inspection and maintenance, reducing power outage time and fault losses.

[0003] Currently, the success rate of disconnecting switch closing is less than 100%. The success of disconnecting switch closing directly affects the normal operation of the power grid system and even the personal safety of operators. Therefore, it is necessary to confirm the closing status of disconnecting switches to avoid operational accidents caused by incomplete closing. In existing technologies, substation monitoring of disconnecting switch closing success relies on single-dimensional information from auxiliary contact switches. In the event of a fault or false alarm, the status of the disconnecting switch cannot be accurately reflected. Furthermore, unattended substation switching operations require remote control. To ensure the correctness and success of remote operations, manual on-site confirmation of equipment operation is necessary. This prolongs equipment operation time, reduces operating efficiency, and fails to embody true unattended operation, thus hindering the development of intelligent substation control. Utility Model Content

[0004] The purpose of this invention is to address the problems that existing disconnect switches require personnel to confirm the closing status after closing, and that existing remote monitoring devices are not accurate enough. This invention proposes a magnetic induction dual confirmation device for disconnect switches and a disconnect switch to solve the above problems.

[0005] To achieve the above objectives, this utility model proposes a magnetic induction dual-confirmation device for isolating switches. It includes an induction box bracket vertically mounted on the equipment, an induction box support plate horizontally connected to the upper part of the bracket, an induction box mounted on the support plate, and reed switch sensors installed at both the open and closed positions inside the induction box. A magnet is mounted on the outside of the induction box and installed on the equipment's crank arm. When the switch is closed or opened, the crank arm moves the magnet, triggering the reed switch sensors. When closing is required, the closing action moves the crank arm, which in turn moves the magnet, causing one end of the magnet to the reed switch sensor position at the open or closed position. The magnetic force of the magnet triggers the reed switch sensor to send a signal to the control room, allowing staff to confirm the closed status without needing to go to the site, reducing their workload. This also avoids errors in judging the closed status, resulting in good overall performance.

[0006] Furthermore, a sensor box cover is installed on the top of the sensor box, which can seal the sensor box and prevent foreign objects from entering the sensor box.

[0007] Furthermore, the inner top of the sensor box is higher than the outer top. This design prevents rainwater and dew from entering the sensor box and avoids short circuits.

[0008] Furthermore, a rain cover is installed on the sensor box tray, located above the sensor box, which further improves the waterproof effect of the sensor box.

[0009] Furthermore, a wiring terminal is located in the center of the sensor box, and a wire outlet hole is provided on the sensor box. The wiring terminal facilitates the connection of wires, and the wire outlet hole facilitates the management of wires.

[0010] Furthermore, the outlet hole is sealed with potting compound to further improve the waterproof effect of the sensor box.

[0011] Furthermore, the magnetic steel component is convex in shape, with a groove on one side that is engaged and fixed on the crank arm of the equipment, and the other side is on the outside of the sensing box. The magnetic force emitted by the magnetic steel component itself can penetrate the sensing box and trigger the reed switch sensor.

[0012] Furthermore, the side of the induction box closest to the magnet has an inwardly concave arc shape, and the side of the magnet closest to the induction box moves along the arc surface.

[0013] On the other hand, a magnetic induction double-confirmation disconnect switch is proposed, including any of the disconnect switch magnetic induction double-confirmation devices described above, and also including a disconnect switch. An induction box bracket is mounted on the disconnect switch. At least two U-shaped grooves are opened at the bottom of the induction box bracket. The U-shaped grooves are located above the flange holes of the disconnect switch. The induction box bracket and the disconnect switch are fixed together by bolts. The magnet is mounted on the equipment crank arm of the disconnect switch by bolts.

[0014] As can be seen from the above technical solutions, this utility model has the following advantages:

[0015] When closing is required, the closing action drives the equipment's crank arm, which in turn moves the magnetic steel component. One end of the magnetic steel component moves to the reed switch sensor position at the opening or closing point. The magnetic force of the magnetic steel component triggers the reed switch sensor to send a signal to the control room, allowing staff to confirm the closing status without needing to go to the site, reducing their workload. This also avoids errors in judging the closing status, resulting in better overall performance. It improves accuracy, enabling more precise judgment of the disconnector's open / closed status and preventing operational errors due to misinterpretation of a single signal; it reduces the risk of misjudgment, ensuring accurate judgment of the disconnector's status and decreasing the probability of misjudgment; it enhances safety, preventing misoperation and providing a more reliable basis for switching operations. Subsequent operations can only be performed when all confirmation signals indicate the disconnector is in the correct position, effectively preventing serious accidents such as load-bearing disconnection and accidental closing, ensuring the safety of the power system and operators; it improves system stability, preventing power system failures caused by disconnector malfunctions and ensuring stable power system operation; and it increases operational efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] In the diagram: 1. Sensor box bracket; 2. Sensor box tray; 3. Sensor box; 4. Magnet; 5. Reed switch sensor; 6. Wiring terminal; 7. Outlet hole; 8. Equipment crank arm; 9. Rain cover; 10. Sensor box cover. Detailed Implementation

[0020] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0021] Example 1

[0022] like Figure 1-2 As shown, this embodiment provides a magnetic induction dual-confirmation device for isolating switches, including an induction box bracket 1 vertically mounted on the equipment. An induction box support plate 2 is horizontally connected to the upper part of the induction box bracket 1, and an induction box 3 is mounted on the induction box support plate 2. Reed switch sensors 5 are installed at both the open and closed positions inside the induction box 3. A magnet 4 is provided on the outside of the induction box 3 and is mounted on the equipment crank arm 8. The magnet 4 is convex in shape, with a groove on one side that is engaged and fixed to the equipment crank arm 8, and the other side is on the outside of the induction box 3. The magnetic force emitted by the magnet 4 can penetrate the induction box 3 and trigger the reed switch sensor 5. The side of the induction box 3 near the magnet 4 is concave. The magnet 4 moves along an arc surface on the side closest to the induction box 3. When the circuit is closed or opened, the device crank arm 8 drives the magnet 4 to move. After the magnet 4 moves, it triggers the reed switch sensor 5. When the circuit needs to be closed, the closing action drives the device crank arm 8 to move, which in turn drives the magnet 4 to move. This causes one end of the magnet 4 to move to the position of the reed switch sensor 5 at the opening or closing position. The magnetic force of the magnet 4 triggers the reed switch sensor 5 to send a signal to the control room, allowing the staff to confirm the closing status without having to go to the site to confirm, reducing the workload of the staff. At the same time, it avoids the situation of misjudging the closing status, and the overall use effect is good.

[0023] Specifically, the top of the sensor box 3 is equipped with a sensor box cover 10, which seals the sensor box 3 to prevent debris from entering. The inner side of the top of the sensor box 3 is higher than the outer side, which prevents rainwater and dew from entering and causing short circuits. A rain cover 9 is installed on the sensor box support plate 2, located above the sensor box 3, further improving its waterproof performance. A terminal block 6 is located in the center of the interior of the sensor box 3, and a wire outlet hole 7 is provided. The terminal block 6 facilitates wire connection, and the wire outlet hole 7 facilitates wire management. The wire outlet hole 7 is sealed with glue to further improve the waterproof performance. The sensor box 3 is fixed to the sensor box support plate 2 with bolts. The bolt holes on the sensor box 3 are elongated holes, which allow adjustment of the sensor box 3's position to accommodate different equipment specifications, thus broadening its applicability.

[0024] The working principle of this utility model is as follows: When the closing operation of the disconnecting switch is involved, the operator issues a closing command in the control room. This command will drive the crank arm connected to the disconnecting switch to start moving. Since the magnetic steel component is installed on the crank arm, the movement of the crank arm will drive the magnetic steel component to move synchronously. Reed switches are installed inside the sensing box at both the opening and closing positions. As the crank arm moves, the magnetic steel component moves closer to the reed switch sensor at the corresponding position. When the magnetic steel component moves to the reed switch sensor position at the opening or closing position, the magnetic force generated by the magnetic steel component will trigger the reed switch sensor. Once the reed switch sensor is triggered, it will immediately send a signal to the control room. In this way, the staff can obtain the closing status of the disconnecting switch in real time in the control room without having to go to the site to confirm, which greatly reduces the labor intensity and effectively avoids the possibility of errors in judging the closing status due to manual on-site judgment.

[0025] The process is similar during the gate opening operation. The operator issues the gate opening command, and the equipment crank arm moves in the opposite direction, causing the magnetic steel component to move away from its original position and away from the previously triggered reed switch sensor. When the magnetic steel component moves to the reed switch sensor at the corresponding gate opening position, the reed switch sensor at that position is triggered and sends a signal to the control room, informing the staff that the isolating switch is in the gate opening state.

[0026] To ensure stable operation of the device in various environments, numerous protective designs have been incorporated. A cover is installed on the top of the sensor box, sealing it tightly and effectively preventing debris from entering and interfering with or damaging the internal precision components. The inner side of the top of the sensor box is higher than the outer side; this sloping design guides rainwater, dew, and other liquids down the outer side of the top, preventing liquid from entering the sensor box and eliminating the risk of short circuits caused by liquid ingress. A rain cover is also installed on the sensor box tray, located directly above the sensor box, further enhancing its waterproof capabilities and allowing it to function normally in harsh weather conditions.

[0027] In terms of electrical connections, a terminal block is located in the center of the induction box, which facilitates the connection of wires by the staff and ensures that the electrical connection between the circuits is solid and reliable. The wire outlet hole on the induction box serves to organize the wires, allowing them to pass through the induction box in an orderly manner and avoiding tangling. The potting seal on the wire outlet hole further enhances the waterproof performance of the induction box, ensuring that even in humid environments, water ingress through the wire outlet hole will not affect the normal operation of the device.

[0028] In terms of installation and adjustment, the sensor box is fixed to the sensor box support plate by bolts. The holes on the sensor box for bolts are designed as elongated holes. When facing equipment of different specifications, the operator can flexibly adjust the position of the sensor box through the elongated holes, so that the device can be widely used in a variety of equipment, greatly expanding its application range and improving the versatility and practicality of the device.

[0029] Example 2

[0030] This embodiment proposes a magnetic induction double-confirmation disconnect switch, including the disconnect switch magnetic induction double-confirmation device described above, and also includes a disconnect switch. An induction box bracket 1 is installed on the disconnect switch. At least two U-shaped grooves are opened at the bottom of the induction box bracket 1. The U-shaped grooves are located above the flange holes of the disconnect switch. The induction box bracket 1 and the disconnect switch are fixed together by bolts. The magnet 4 is installed on the equipment crank arm 8 of the disconnect switch by bolts.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic induction dual-confirmation device for an isolating switch, comprising an induction box bracket (1) capable of being vertically mounted on the device, characterized in that, The upper part of the sensor box bracket (1) is horizontally connected to the sensor box tray (2), and the sensor box (3) is installed on the sensor box tray (2). Reed switch sensors (5) are installed at the opening and closing positions inside the sensor box (3). A magnet (4) is provided on the outside of the sensor box (3). The magnet (4) can be installed on the equipment crank arm (8). When the gate is closed or opened, the equipment crank arm (8) drives the magnet (4) to move. After the magnet (4) moves, it triggers the reed switch sensor (5).

2. The magnetic induction dual verification device for isolating switch according to claim 1, characterized in that, The top of the sensor box (3) is fitted with a sensor box cover (10).

3. The magnetic induction dual verification device for isolating switches according to claim 1, characterized in that, The inner top of the sensor box (3) is higher than the outer top.

4. The magnetic induction dual verification device for isolating switches according to claim 1, characterized in that, A rain cover (9) is installed on the sensor box tray (2), and the rain cover (9) is located above the sensor box (3).

5. The magnetic induction dual verification device for isolating switches according to claim 1, wherein, The sensor box (3) has a wiring terminal (6) in the center of its interior and a wire outlet hole (7) on its surface.

6. The magnetic induction dual verification device for isolating switches according to claim 5, characterized in that, The outlet hole (7) is provided with a glue seal.

7. The magnetic induction dual verification device for isolating switches according to claim 1, wherein, The magnet (4) is convex in shape, with a slot on one side. The slot is engaged and fixed on the device crank arm (8), and the other side is on the outside of the sensing box (3). The magnetic force emitted by the magnet (4) can penetrate the sensing box (3) and trigger the reed switch sensor (5).

8. The magnetic induction dual verification device for isolating switches according to claim 7, characterized in that, The side of the induction box (3) near the magnet (4) is concave arc-shaped, and the side of the magnet (4) near the induction box (3) moves along the arc surface.

9. A magnetically induced dual confirmation disconnector, characterized in that The device includes the magnetic induction double confirmation device for disconnecting switch as described in any one of claims 1-8, and also includes a disconnecting switch, an induction box bracket (1) mounted on the disconnecting switch, at least two U-shaped grooves are provided at the bottom of the induction box bracket (1), the U-shaped grooves are located above the flange hole of the disconnecting switch, the induction box bracket (1) is fixed to the disconnecting switch by bolts, and the magnetic steel part (4) is mounted on the equipment crank arm (8) of the disconnecting switch by bolts.

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