Novel high-voltage auxiliary switch

Abstract

The utility model discloses a novel high-voltage auxiliary switch, which relates to the technical field of switches and comprises a shell, an upper cover, a push rod, a binding post, a reset spring, a static contact, a touch assembly, a pin shaft and the like. When the moving contact and the static contact are in a disconnected state, the switch can form a dual-port structure between the two static contacts. The unique design can effectively improve the power frequency withstand voltage value of the port between the two static contacts under the condition of a small structural volume. Compared with a traditional high-voltage auxiliary switch, the high-voltage auxiliary switch has the advantages that the risks of insulation breakdown and arc reignition are reduced due to the larger contact breaking distance, the stable and reliable electrical performance in a high-voltage environment is ensured, the safety and stability of equipment operation are greatly improved, and the conditions of equipment damage and production interruption caused by electrical faults are reduced.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, and in particular to a novel high-voltage auxiliary switch. Background Technology

[0002] High-voltage auxiliary switches are key equipment in power systems and many industrial fields, playing an indispensable role in the connection and disconnection control of circuits. Their applications are wide-ranging, covering many important industries such as power systems, petroleum, chemical, coal mining, metallurgy, and electrified railways.

[0003] In power systems, high-voltage auxiliary switches are used to control the switching on and off of high-voltage circuits, ensuring stable power transmission and distribution, and are crucial for the safe operation of the power grid. In the petrochemical industry, production processes involve numerous high-voltage, flammable, and explosive environments; the reliable operation of high-voltage auxiliary switches directly affects the continuity and safety of production. In coal mines, due to the complex underground environment and the presence of flammable and explosive gases such as methane, the safety requirements for electrical equipment are extremely high; the performance of high-voltage auxiliary switches directly impacts safe production in the mine. In the metallurgical and electrified railway sectors, high-voltage auxiliary switches are also core components ensuring the normal operation of equipment and the effective supply of power.

[0004] However, existing high-voltage auxiliary switches on the market have significant defects. Among these, insufficient contact disconnection distance is particularly prominent. The small contact disconnection distance limits the power frequency withstand voltage between the two stationary contacts. Under high-voltage conditions, this can easily lead to serious faults such as insulation breakdown and arc reignition. Once these faults occur, they will not only damage equipment and disrupt normal production, but may also cause safety accidents, threatening personnel lives and company property.

[0005] Furthermore, existing high-voltage auxiliary switches often have complex structural designs and large sizes to meet basic electrical performance requirements. This not only increases the manufacturing cost of the equipment but also brings many inconveniences in terms of installation space. In some places with stringent space requirements, such as compact substations and narrow underground spaces, traditional high-voltage auxiliary switches are difficult to meet the actual needs.

[0006] To address the aforementioned issues, meet the higher requirements of various industries for high-voltage auxiliary switches in terms of performance, structure, and safety, and fill the gap in the industry for high-voltage auxiliary switches with large contact disconnection distances, it is imperative to develop a new type of high-voltage auxiliary switch. Summary of the Invention

[0007] The purpose of this invention is to provide a new type of high-voltage auxiliary switch in order to solve the above-mentioned problems.

[0008] To address the aforementioned problems, this utility model provides a technical solution: a novel high-voltage auxiliary switch, comprising a housing, a top cover, a push rod, terminals, a return spring, a stationary contact, an actuating component, and a pin; the top cover is fixedly connected to the side of the housing; two terminals are fixedly connected to the top cover; a stationary contact is fixedly connected below the terminals, and the stationary contact is located inside the cavity of the housing; a push rod is slidably connected to the cavity of the housing, and the top end of the push rod extends out of the housing; a return spring is fixedly connected to the bottom end of the push rod, and the return spring is engaged in a pre-set groove in the housing; an actuating component is movably connected to the push rod via a pin.

[0009] Preferably, the specific structure of the actuation component includes a moving contact, a guide shaft, and a compression spring; there are two moving contacts arranged in a fan shape; the ends of the moving contacts are all hinged to the middle position of the push rod by pins; compression springs are provided on both sides of the ends of the moving contacts, and the compression springs are covered and connected to the outer surface of the pins; guide shafts are provided in the guide grooves preset at the lower end of the moving contacts, and the two sides of the guide shafts are slidably connected to the rectangular sliding grooves preset on both sides of the middle position of the push rod.

[0010] Preferably, the specific structure of the actuation component includes a moving contact and a guide shaft; the terminal block and the stationary contact are integrally formed together; the moving contact is a single unit and is straight; the middle end of the moving contact is movably connected to the middle position of the push rod by a pin; a guide shaft is provided in a guide hole preset in the middle position of the moving contact, and the two ends of the guide shaft are slidably connected in rectangular grooves preset on both sides of the middle position of the push rod.

[0011] Preferably, the top of the push rod is umbrella-shaped.

[0012] Preferably, the housing is an insulating housing.

[0013] Preferably, the push rod is an insulated push rod.

[0014] The beneficial effects of this utility model are as follows: (1) Improved electrical performance: When the moving and stationary contacts are in the open state, the switch can form a double-port structure between the two stationary contacts. This unique design can effectively improve the power frequency withstand voltage value between the two stationary contacts in a smaller structural volume. Compared with traditional high-voltage auxiliary switches, the larger contact disconnection distance reduces the risk of insulation breakdown and arc reignition, ensures stable and reliable electrical performance under high-voltage conditions, greatly improves the safety and stability of equipment operation, and reduces equipment damage and production interruption caused by electrical faults.

[0015] (2) Optimize structural design: On the one hand, the housing and push rod made of insulating materials enclose the live conductor in the housing, which not only reduces the overall volume of the auxiliary switch, but also has the advantages of moisture-proof and pollution-proof, which improves the adaptability of the equipment in harsh environments, reduces maintenance costs, and extends service life; on the other hand, the reasonable structural design makes the overall structure of the product compact and the layout reasonable. For example, the umbrella-shaped design at the top of the push rod may be easier to operate or play a certain functional advantage in specific environments, while simplifying the manufacturing process and thus reducing production costs.

[0016] (3) Expanding Functional Applications: This technical solution has strong flexibility and expandability. By moving the terminal block and stationary contact to the lower side of the housing, the normally open auxiliary switch can be easily converted into a normally closed auxiliary switch to meet the diverse needs of different circuit systems. After adding mechanical structures and electromagnetic mechanisms to one side of the switch operation end, it can be combined into a disconnecting switch and a relay, realizing the integration and expansion of functions, enabling the product to play a greater role in different power systems and industrial scenarios, and improving the versatility and practicality of the equipment.

[0017] (4) Enhanced safety performance: The design of the insulating shell and push rod not only effectively prevents operators from accidentally getting electric shocks, but also reduces the impact of external environmental factors on internal live parts, further improving the safety of the product. This is especially important in dangerous environments such as petroleum, chemical, and coal mines where there are flammable and explosive gases or dust, reducing the risk of safety accidents caused by electrical equipment failures and providing strong protection for personnel safety and enterprise property safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0019] Figure 2 This is a diagram showing the internal structure of the switch when it is turned on in Embodiment 1 of this utility model.

[0020] Figure 3 This is a diagram of the internal structure of Embodiment 1 of this utility model when the switch is off.

[0021] Figure 4 This is a partial structural diagram of Embodiment 1 of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] 1-Housing; 2-Top cover; 3-Push rod; 4-Terminal; 5-Reset spring; 6-Stationary contact; 7-Contact; 8-Guide shaft; 9-Compression spring; 10-Pin. Detailed Implementation Example

[0024] like Figures 1 to 4 As shown, this specific embodiment adopts the following technical solution: A novel high-voltage auxiliary switch includes a housing 1, a top cover 2, a push rod 3, a terminal block 4, a return spring 5, a stationary contact 6, an actuating component, and a pin 10; the top cover 2 is fixedly connected to the side of the housing 1; two terminal blocks 4 are fixedly connected to the top cover 2; a stationary contact 6 is fixedly connected below the terminal block 4, and the stationary contact 6 is located inside the cavity of the housing 1; the push rod 3 is slidably connected to the cavity of the housing 1, and the top end of the push rod 3 extends out of the housing 1; a return spring 5 is fixedly connected to the bottom end of the push rod 3, and the return spring 5 is engaged in a pre-set groove in the housing 1; an actuating component is movably connected to the push rod 3 through the pin 10.

[0025] like Figures 1 to 4 As shown, the specific structure of the actuation component includes a moving contact 7, a guide shaft 8, and a compression spring 9; there are two moving contacts 7 arranged in a fan shape; the ends of the moving contacts 7 are hinged to the middle position of the push rod 3 by a pin 10; compression springs 9 are provided on both sides of the ends of the moving contacts 7, and the compression springs 9 are wrapped and connected to the outer surface of the pin 10; the guide shafts 8 are provided in the guide grooves preset at the lower end of the moving contacts 7, and the two sides of the guide shafts 8 are slidably connected to the rectangular sliding grooves preset on both sides of the middle position of the push rod 3.

[0026] The top of the push rod 3 is umbrella-shaped; the housing 1 is an insulating housing; and the push rod 3 is an insulating push rod.

[0027] The usage state of Embodiment 1 of this utility model is as follows:

[0028] (1) Connected State: When the circuit needs to be connected, the operator pushes the push rod 3. Since the push rod 3 is movably connected to the moving contact 7 through the pin 10, and the moving contact 7 is arranged in a fan shape, under the push of the push rod 3, the two moving contacts 7 swing around the pin 10 at a certain angle. As the moving contact 7 swings, its end gradually approaches and eventually contacts the stationary contact 6. At this time, the circuit forms a path through the terminal 4, the stationary contact 6, and the moving contact 7, realizing the connection of the circuit and ensuring the transmission of power in the circuit. For details, please refer to Figure 2 .

[0029] (2) Disconnected State: When it is necessary to disconnect the circuit, the operator releases the push rod 3. At this time, the return spring 5 installed in the circular groove at the lower end of the push rod 3 functions, generating an upward elastic force that pushes the push rod 3 upward to reset. The reset of the push rod 3 causes the moving contact 7 connected to it to move synchronously, separating the moving contact 7 from the stationary contact 6, thereby cutting off the circuit and completing the circuit disconnection operation. Figure 3Throughout the process, the guide shaft 8 cooperates with the guide hole on the moving contact 7 and the rectangular groove on the push rod 3 to ensure the stability and accuracy of the moving contact 7 during movement, enabling it to reliably contact and separate from the stationary contact 6. Example

[0030] like Figure 5 As shown, this specific embodiment adopts the following technical solution: A novel high-voltage auxiliary switch includes a housing 1, a top cover 2, a push rod 3, a terminal block 4, a return spring 5, a stationary contact 6, an actuating component, and a pin 10; the top cover 2 is fixedly connected to the side of the housing 1; two terminal blocks 4 are fixedly connected to the top cover 2; a stationary contact 6 is fixedly connected below the terminal block 4, and the stationary contact 6 is located inside the cavity of the housing 1; the push rod 3 is slidably connected to the cavity of the housing 1, and the top end of the push rod 3 extends out of the housing 1; a return spring 5 is fixedly connected to the bottom end of the push rod 3, and the return spring 5 is engaged in a pre-set groove in the housing 1; an actuating component is movably connected to the push rod 3 through the pin 10.

[0031] like Figure 5 As shown, the specific structure of the actuation component includes a moving contact 7 and a guide shaft 8; the terminal 4 and the stationary contact 6 are integrally formed together; the moving contact 7 is a single unit and is straight; the middle end of the moving contact 7 is movably connected to the middle position of the push rod 3 through a pin 10; the guide shaft 8 is provided in the guide hole preset in the middle position of the moving contact 7, and the two ends of the guide shaft 8 are slidably connected to the rectangular grooves preset on both sides of the middle position of the push rod 3.

[0032] The top of the push rod 3 is umbrella-shaped; the housing 1 is an insulating housing; and the push rod 3 is an insulating push rod.

[0033] The usage state of Embodiment 2 of this utility model is as follows: The working state of the novel high-voltage auxiliary switch in Embodiment 2 is the opposite of that in Embodiment 1, and it is a normally closed auxiliary open type. The specific working process is as follows:

[0034] (1) Connected State: In the initial state, push rod 3 is in its natural position. Under the action of return spring 5, push rod 3 is pushed upward. The moving contact 7, which is movably connected to the middle part of push rod 3 through pin 10, also moves upward. The moving contact 7 contacts terminal 4 (at this time, terminal 4 is both a terminal and a stationary contact), so that the two terminals are connected and the circuit is in a conductive state. During this process, guide shaft 8 passes through the guide hole preset in the middle position of moving contact 7, and its two ends slide in the rectangular grooves preset on both sides of the middle position of push rod 3, which plays a role in stabilizing the movement trajectory of moving contact 7, ensuring that moving contact 7 can accurately contact terminal 4, and ensuring the reliability of circuit connection. For reference, see below. Figure 5 The state when the push rod is released at position 3.

[0035] (2) Disconnected State: When it is necessary to disconnect the circuit, the operator pushes the push rod 3 downwards. The push rod 3 moves downwards, causing the moving contact 7 to rotate around the pin 10 and move downwards, separating the moving contact 7 from the terminal 4, thereby cutting off the circuit. At this time, the circuit is in the disconnected state, completing the circuit disconnection operation, i.e. Figure 5 The image shows the state where the contact is disconnected when push rod 3 is pushed down.

[0036] In addition, this technical solution can move the terminal 4 and the stationary contact 6 to the lower side inside the housing 1, so that the normally open auxiliary switch of Embodiment 1 can be changed into a normally closed auxiliary switch.

[0037] In addition, by adding a mechanical structure and an electromagnetic mechanism to the switch operation end side of this technical solution, it can be combined into an isolating switch and a relay.

[0038] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model, which is defined by the appended claims and their equivalents.

[0041] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

Claims

1. A novel high-voltage auxiliary switch, characterized in that: Includes housing (1), top cover (2), push rod (3), terminal block (4), reset spring (5), stationary contact (6), actuation assembly and pin (10); A top cover (2) is fixedly connected to the side of the housing (1); Two terminals (4) are fixedly connected to the upper cover (2); A stationary contact (6) is fixedly connected below the terminal block (4), and the stationary contact (6) is located inside the cavity of the housing (1); A push rod (3) is slidably connected in the cavity of the housing (1), and the top end of the push rod (3) extends out of the housing (1). The bottom end of the push rod (3) is fixedly connected to a reset spring (5), which is snapped into a pre-set groove in the housing (1); The push rod (3) is movably connected to an actuating component via a pin (10).

2. The novel high-voltage auxiliary switch according to claim 1, characterized in that: The specific structure of the actuation component includes a moving contact (7), a guide shaft (8), and a compression spring (9). The moving contact (7) consists of two parts, arranged in a fan shape; The ends of the moving contacts (7) are all hinged to the middle of the push rod (3) by pins (10); Both sides of the end of the moving contact (7) are provided with compression springs (9), and the compression springs (9) are wrapped around and connected to the outer surface of the pin (10); The lower end of the moving contact (7) is provided with a guide shaft (8), and the two sides of the guide shaft (8) are slidably connected to the rectangular sliding grooves on both sides of the middle end of the push rod (3).

3. The novel high-voltage auxiliary switch according to claim 1, characterized in that: The specific structure of the actuation component includes a moving contact (7) and a guide shaft (8). The terminal block (4) and the stationary contact (6) are integrally formed together; The moving contact (7) is a single unit and is linear; The middle end of the moving contact (7) is movably connected to the middle end of the push rod (3) via a pin (10); The guide shaft (8) is provided in the guide hole at the middle position of the moving contact (7), and the two ends of the guide shaft (8) are slidably connected in the rectangular grooves at the middle position of the push rod (3).

4. The novel high-voltage auxiliary switch according to claim 1, characterized in that: The top of the push rod (3) is umbrella-shaped.

5. The novel high-voltage auxiliary switch according to claim 1, characterized in that: The housing (1) is an insulating housing.

6. The novel high-voltage auxiliary switch according to claim 1, characterized in that: The push rod (3) is an insulated push rod.

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