A protective device for electric high-voltage switch

Abstract

The invention discloses a protective device for a high-voltage electric switch, comprising a base, a cover body, an air pump, a high-voltage switch and an electric push rod fixedly mounted on the top of the base, an arc extinguishing cover fixedly mounted on the inner wall of the cover body, a high-voltage nozzle connected and mounted on the top of the arc extinguishing cover, a first electromagnetic relay electrically mounted on the outside of the air pump, and a second electromagnetic relay electrically mounted on the outside of the electric push rod. The invention can realize the on-off control of the high-voltage switch by a small circuit through a connecting rod in conjunction with a ceramic sleeve, which not only controls safety but also solves the problem that it is inconvenient to control the on-off of the high-voltage switch when the cover body covers the high-voltage switch. When the ceramic sleeve turns on and off the high-voltage switch, the air pump can be controlled to start through the first electromagnetic relay, and the high-voltage nozzle can spray a high-speed airflow to blow out the arc on the high-voltage switch. The arc extinguishing cover can ensure the safety of the high-voltage switch when it is on and off, which is more practical and suitable for wide promotion and use.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage switches, and in particular, relates to a protective device for a high-voltage power switch. Background Art

[0002] High-voltage switches are a type of component that switches high-voltage circuits on and off. Most of them are installed on the main routes of high-voltage circuits. Generally speaking, high-voltage circuits do not need to be powered off, but for safety reasons, high-voltage circuits need to be disconnected during construction to ensure the personal safety of power personnel. High-voltage switches will generate large arc sparks during the power-on and power-off process, and high-voltage switches are generally equipped with protective covers, which cannot safely handle arc sparks. Therefore, we propose a protective device for electric high-voltage switches.

[0003] After searching CN212485197U, a protective device for a high-voltage electric switch is disclosed, including a high-voltage electric switch body and a mounting plate, the high-voltage electric switch body is mounted on the mounting plate, a protective shell is arranged on the outside of the high-voltage electric switch body, a protective top plate is arranged on the top of the protective shell, the protective top plate and the protective shell are an integrated structure, connecting blocks are integrally formed at the four corners of the bottom side of the protective shell, a positioning block is fused under the connecting block, a through groove matching the positioning block is opened at a position corresponding to the positioning block in the mounting plate, and the positioning block and the mounting plate are fixedly connected by a fixing member.

[0004] However, the inventors have discovered that the technical solution still has at least the following defects: the above-mentioned device provides external protection for the high-voltage switch through a cover, but it is not convenient to perform on-off operations on the high-voltage switch, and the cover of the above-mentioned device has a heat dissipation port, through which rainwater can easily enter the interior of the cover.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a high-voltage power switch protection device. To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A protective device for a high-voltage electric switch comprises a base, a cover body, an air pump, a high-voltage switch and an electric push rod are fixedly installed on the top of the base, an arc-extinguishing cover is fixedly installed on the inner wall of the cover body, a high-voltage nozzle is connected and installed on the top of the arc-extinguishing cover, a first electromagnetic relay is electrically installed on the outside of the air pump, a second electromagnetic relay is electrically installed on the outside of the electric push rod, a connecting rod is hingedly installed on the top of the electric push rod, a ceramic sleeve is hingedly installed on the outside of the connecting rod, U-shaped pipes are connected and installed on both sides of the outside of the cover body, and an exhaust fan is fixedly installed on the inner wall of the output end of the U-shaped pipe.

[0008] Furthermore, fixed frames are fixedly installed on both sides of the outside of the cover body, and the U-shaped pipe is located inside the fixed frame.

[0009] Furthermore, a pipe body is installed on the outside of the air pump, and the pipe body is connected to the high-pressure nozzle.

[0010] Furthermore, the ceramic sleeve is embedded and connected with the knife rod of the high-voltage switch.

[0011] Furthermore, the high voltage switch is located inside the arc extinguishing cover.

[0012] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0013] 1. The present invention can control the electric push rod to lift the connecting rod through the low-voltage control circuit through the second electromagnetic relay. The connecting rod can cooperate with the ceramic sleeve to realize the small circuit control of the high-voltage switch. Not only is the control safe, but also solves the problem that the cover body covers the high-voltage switch and it is inconvenient to control the on and off of the high-voltage switch. When the ceramic sleeve turns on and off the high-voltage switch, the air pump can be controlled to start through the first electromagnetic relay, and the high-pressure nozzle can spray high-speed airflow to blow out the arc on the high-voltage switch. In combination with the arc extinguishing cover, the safety of the high-voltage switch when it is turned on and off can be ensured.

[0014] 2. The present invention connects the outside with the inside of the cover through a U-shaped pipe, and quickly extracts the heat inside the cover through an exhaust fan to ensure that the internal environment of the cover is at a safe temperature. The U-shaped pipe is curved and the output direction of the U-shaped pipe is downward, which can greatly reduce the probability of external rainwater entering the inside of the cover through the U-shaped pipe.

[0015] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 It is a front view of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the U-shaped pipeline of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the electric push rod of the present invention.

[0020] In the figure: 1-hood; 2-fixed frame; 3-U-shaped pipe; 4-exhaust fan; 5-arc extinguishing hood; 6-high-pressure nozzle; 7-ceramic sleeve; 8-tube body; 9-air pump; 10-first electromagnetic relay; 11-high-voltage switch; 12-base; 13-electric push rod; 14-second electromagnetic relay; 15-connecting rod.

[0021] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0023] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] like Figures 1 to 3As shown, a protective device for a high-voltage electric switch described in this embodiment includes a base 12, a cover body 1, an air pump 9, a high-voltage switch 11 and an electric push rod 13 are fixedly installed on the top of the base 12, an arc extinguishing cover 5 is fixedly installed on the inner wall of the cover body 1, and the arc extinguishing cover 5 can shield the arc generated by the high-voltage switch 1, and a high-pressure nozzle 6 is installed on the top of the arc extinguishing cover 5. The high-pressure nozzle 6 cooperates with the air pump 9 to spray high-pressure airflow to blow out the arc, and a first electromagnetic relay 10 is electrically installed on the outside of the air pump 9, and the first electromagnetic relay 10 can control the start and stop of the air pump 9. A second electromagnetic relay 14 is electrically installed on the outside of the push rod 13, and the second electromagnetic relay 14 can extend and retract the electric push rod 13. A connecting rod 15 is hingedly installed on the top of the electric push rod 13, and a ceramic sleeve 7 is hingedly installed on the outside of the connecting rod 15. The electric push rod 13 cooperates with the connecting rod 15 to control the lifting and lowering of the ceramic sleeve 7. U-shaped pipes 3 are installed on both sides of the outside of the cover body 1. The U-shaped pipe 3 connects the outside with the inside of the cover body 1. An exhaust fan 4 is fixedly installed on the inner wall of the output end of the U-shaped pipe 3. After the exhaust fan 4 is started, the heat inside the cover body 1 can be extracted.

[0027] The second electromagnetic relay 14 controls the electric push rod 13 to lift the connecting rod 15. The connecting rod 15 cooperates with the ceramic sleeve 7 to drive the knife rod of the high-voltage switch 11 to lift. The ceramic sleeve 7 can slide on the outer wall of the knife rod. The ceramic sleeve 7 has a high degree of insulation. After the knife rod is separated, an arc will be generated. The air pump 9 can be controlled by the first electromagnetic relay 10 to start. The high-pressure nozzle 6 can spray a high-speed airflow to blow out the arc of the high-voltage switch 11. The arc extinguishing cover 5 can ensure the safety of the high-voltage switch 11 when it is turned on and off. The second electromagnetic relay 14 controls the electric push rod 13 The connecting rod 15 is sunk, and the ceramic sleeve 7 can drive the knife rod to close and cooperate with the high-voltage switch 11 to realize the power-on of the high-voltage switch 11. When a lot of heat is generated inside the cover body 1, the exhaust fan 4 is in a long-term open state. The U-shaped pipe 3 connects the outside with the inside of the cover body 1, and the heat inside the cover body 1 is quickly extracted through the exhaust fan 4 to ensure that the internal environment of the cover body 1 is at a safe temperature. The U-shaped pipe 3 is bent and the output direction of the U-shaped pipe 3 is downward, which can greatly reduce the probability of external rainwater entering the cover body 1 through the U-shaped pipe 3.

[0028] Fixed frames 2 are fixedly installed on both sides of the outside of the cover body 1, and the U-shaped pipe 3 is located inside the fixed frame 2. Furthermore, the fixed frame 2 can fix the U-shaped pipe 3 to ensure the stability of the U-shaped pipe 3.

[0029] The air pump 9 is connected to the outside thereof and is provided with a pipe body 8 , which is connected to the high-pressure nozzle 6 . Furthermore, after the air pump 9 is started, the high-pressure nozzle 6 can spray a high-speed airflow to blow out the arc of the high-voltage switch 11 .

[0030] The ceramic sleeve 7 is embedded and connected with the knife rod of the high-voltage switch 11 . Furthermore, the ceramic sleeve 7 has a high degree of insulation, which can prevent the high-voltage current of the knife rod from being transmitted through the ceramic sleeve 7 .

[0031] The high-voltage switch 11 is located inside the arc-extinguishing cover 5. Furthermore, the high-voltage nozzle 6 can spray high-speed airflow to blow out the arc on the high-voltage switch 11, and cooperate with the arc-extinguishing cover 5 to ensure the safety of the high-voltage switch 11 when it is turned on and off.

[0032] Principle: The second electromagnetic relay 14 controls the electric push rod 13 to lift the connecting rod 15. The connecting rod 15 cooperates with the ceramic sleeve 7 to drive the knife rod of the high-voltage switch 11 to lift. The ceramic sleeve 7 can slide on the outer wall of the knife rod. The ceramic sleeve 7 has a high degree of insulation. An arc will be generated after the knife rod is separated. The air pump 9 can be started by the first electromagnetic relay 10. The high-pressure nozzle 6 can spray a high-speed airflow to blow out the arc on the high-voltage switch 11. The second electromagnetic relay 14 controls the electric push rod 13 to sink the connecting rod 15. The ceramic sleeve 7 can drive the knife rod to close and cooperate with the high-voltage switch 11 to realize the power-on of the high-voltage switch 11. When more heat is generated inside the cover body 1, the U-shaped pipe 3 connects the outside world with the inside of the cover body 1, and the heat inside the cover body 1 is quickly extracted by the exhaust fan 4. The U-shaped pipe 3 is curved and the output direction of the U-shaped pipe 3 is downward, which can greatly reduce the probability of external rainwater entering the cover body 1 through the U-shaped pipe 3.

[0033] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A protective device for a high-voltage power switch, comprising a base (12), characterized in that: A cover body (1), an air pump (9), a high-voltage switch (11) and an electric push rod (13) are fixedly mounted on the top of the base (12); an arc extinguishing cover (5) is fixedly mounted on the inner wall of the cover body (1); a high-voltage nozzle (6) is installed on the top of the arc extinguishing cover (5); a first electromagnetic relay (10) is electrically mounted on the outside of the air pump (9); a second electromagnetic relay (14) is electrically mounted on the outside of the electric push rod (13); and a connecting rod (15) is hingedly mounted on the top of the electric push rod (13). A ceramic sleeve (7) is hingedly mounted on the outside of the connecting rod (15), and the ceramic sleeve (7) is slidably sleeved and connected to the knife rod of the high-voltage switch (11). The ceramic sleeve (7) can slide on the outer wall of the knife rod. U-shaped pipes (3) are installed on both sides of the outside of the cover body (1). The U-shaped pipe (3) connects the outside with the inside of the cover body (1). The U-shaped pipe (3) is bent and the output direction of the U-shaped pipe (3) is downward. An exhaust fan (4) is fixedly mounted on the inner wall of the output end of the U-shaped pipe (3).

2. A power high voltage switch protection device according to claim 1, characterized in that: Fixed frames (2) are fixedly mounted on both sides of the exterior of the cover body (1), and the U-shaped pipe (3) is located inside the fixed frame (2).

3. The protective device for a high-voltage power switch according to claim 1, characterized in that: The air pump (9) is connected to the outside and is provided with a pipe body (8), and the pipe body (8) is connected to the high-pressure nozzle (6).

4. The protective device for a high-voltage power switch according to claim 1, characterized in that: The high-voltage switch (11) is located inside the arc extinguishing hood (5).

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