Protective knife switch capable of being automatically switched off

Abstract

The utility model relates to the technical field of knife switches, and discloses a protective knife switch capable of being automatically switched off, which comprises a bottom plate, a cover plate and a plurality of groups of moving contact blades positioned between the bottom plate and the cover plate, the bottom plate comprises an adjusting groove and a mounting groove which are arranged in the bottom plate, a push block is arranged in the adjusting groove, a servo motor is arranged in the mounting groove, and the push block is connected with the servo motor. The output end of the servo motor is connected with a screw rod penetrating into the push block; a trapezoid block is arranged on one side, close to the bottom plate, of the moving contact blade. The pushing block is adjusted up and down in the bottom plate through the adjusting groove, power is provided for up-down adjustment of the pushing block through the servo motor and the screw rod, and the inclined face structure on one side of the pushing block makes contact with the inclined face structure of the trapezoidal block to extrude the trapezoidal block; therefore, the push block upwards pushes the trapezoidal block to separate the moving contact blade from the conductive clamping opening, so that the knife switch is automatically switched off, and the use protection performance of the knife switch is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of knife switches, and in particular relates to a protective knife switch which can be automatically disconnected. Background Art

[0002] Electrical equipment is a general term for generators, transformers, power lines, circuit breakers and other equipment in the power system, and knife switches are one of the main components of electrical equipment. They are suitable for complete sets of distribution devices with AC frequencies up to 50Hz, AC voltages up to 380V, DC up to 440V, and rated currents up to 1500A. They are used for frequent manual connection and disconnection of AC and DC circuits or as isolating switches.

[0003] Application number CN202223058585.1 discloses a knife switch, which includes: a base plate and a current transformer, the base plate is provided with an incoming static contact, an outgoing static contact and a moving contact blade, the base plate is provided with a fixed slot, and the current transformer is installed in the fixed slot through the static contact. This patent collects the current signal of the knife switch by installing a current transformer on the base plate of the knife switch, so that it is not limited by the space and product size requirements of the knife switch box, and increases the convenience of measuring current; when this type of knife switch is used, when leakage occurs and the knife switch needs to be disconnected, it still needs to be manually operated, which is easy to cause harm to the staff, resulting in poor protection of the knife switch and inconvenience in the use of the knife switch. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a protective knife switch which can be automatically disconnected, so as to improve the safety and protection of the knife switch.

[0005] The technical scheme of the utility model is a protective knife switch capable of automatically disconnecting, comprising a bottom plate, a cover plate located at one side of the bottom plate and a plurality of groups of moving contact blades located between the bottom plate and the cover plate.

[0006] The bottom plate includes an adjustment slot and a mounting slot arranged inside the bottom plate, and a servo motor arranged inside the mounting slot, a push block is arranged inside the adjustment slot, and a screw rod penetrating into the push block is connected to the output end of the servo motor. The end surface of the push block close to the moving contact blade is an inclined surface.

[0007] Furthermore, a trapezoidal block is provided on one side of the moving contact blade close to the bottom plate.

[0008] Preferably, the top and bottom ends of the base plate are both provided with fixing grooves, the bottom end of the base plate is provided with a plurality of groups of outgoing static contacts, and the ends of the outgoing static contacts close to the moving contact blades are provided with mounting blocks.

[0009] Preferably, a plurality of groups of incoming line static contacts are arranged at the top of the bottom plate, and a conductive clamp is arranged on one side of the incoming line static contacts close to the moving contact blade.

[0010] Preferably, a plurality of groups of movable grooves are provided on the top of the cover plate, and the movable grooves facilitate the rotation of the movable contact blades.

[0011] Preferably, a plurality of groups of mounting bolts are provided on both sides of the cover plate, and grooves penetrating into the interior of the bottom plate are provided on the inner sides of the mounting bolts.

[0012] Preferably, the push block is movably connected to the bottom plate via an adjustment slot.

[0013] Preferably, the servo motor is detachably connected to the mounting slot via fixing bolts.

[0014] Preferably, a bearing is provided at the bottom end of the adjusting groove, and the bottom end of the screw rod passes through the inside of the bearing.

[0015] Preferably, a threaded hole matching the screw rod is provided inside the push block, and the push block is threadedly connected to the screw rod through the threaded hole.

[0016] Preferably, the outgoing line static contact and the incoming line static contact are fixedly connected to the bottom plate through fixing grooves respectively, and a plurality of wiring holes are provided on the top and the bottom of the bottom plate.

[0017] Preferably, a rotating shaft is provided at the bottom end of the moving contact blade, and both ends of the rotating shaft respectively penetrate into the interior of the mounting block.

[0018] Preferably, a push handle is provided at the top end of the moving contact blade.

[0019] Preferably, a clamping slot is provided on one side of the conductive clamp close to the movable contact blade, and the movable contact blade is detachably connected to the conductive clamp via the clamping slot.

[0020] Preferably, both the outgoing line static contact and the incoming line static contact are provided with fastening bolts.

[0021] Preferably, arc grooves are provided on the top and the bottom of the cover plate.

[0022] Preferably, threaded holes matching the grooves are provided on both sides of the base plate, and the cover plate is detachably connected to the base plate via mounting bolts.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model can adjust the push block up and down inside the bottom plate through the adjustment groove, and the servo motor and the screw rod provide power for the up and down adjustment of the push block. The inclined surface structure on one side of the push block contacts the inclined surface structure of the trapezoidal block to squeeze the trapezoidal block, so that the push block moves upward and pushes the trapezoidal block to separate the moving contact blade from the conductive clamping mouth, thereby realizing the automatic disconnection of the knife switch and making the knife switch more protective when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 It is a cross-sectional view of the utility model.

[0028] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0029] Explanation of the reference numerals: base plate 1, mounting slot 101, adjustment slot 102, push block 103, servo motor 104, screw 105, trapezoidal block 106, moving contact blade 2, fixing slot 201, outgoing static contact 202, mounting block 203, incoming static contact 204, conductive clamp 205, push handle 206, cover plate 3, movable slot 301, mounting bolt 302, groove 303. DETAILED DESCRIPTION

[0030] like Figure 1-3 As shown, the protective knife switch capable of automatically disconnecting provided by the utility model comprises a base plate 1, a cover plate 3 and a plurality of groups of moving contact blades 2 located between the base plate 1 and the cover plate 3. The base plate 1 comprises: a mounting groove 101, an adjustment groove 102 and a servo motor 104 arranged inside the mounting groove 101. A push block 103 is arranged inside the adjustment groove 102; the output end of the servo motor 104 is connected to a screw rod 105 penetrating into the inside of the push block 103, and the screw rod 105 is driven to rotate by the servo motor 104, so as to provide power for the up and down movement of the push block 103; the end surface of the push block 103 close to the moving contact blade is an inclined surface. A trapezoidal block 106 is arranged on the side of the moving contact blade 2 close to the base plate, and the moving contact blade 2 can be pushed to rotate by the mutual cooperation between the push block 103 and the trapezoidal block 106.

[0031] like Figure 2As shown, the top and bottom ends of the base plate 1 are both provided with fixing grooves 201, and the outgoing line static contacts 202 and the incoming line static contacts 204 are fixedly installed inside the base plate 1 through the fixing grooves 201. A plurality of groups of outgoing line static contacts 202 are provided at the bottom end inside the base plate 1, and mounting blocks 203 are provided at the ends of the outgoing line static contacts 202 close to the moving contact blades, and a plurality of groups of incoming line static contacts 204 are provided at the top end inside the base plate 1, and a conductive clamp 205 is provided at the end of the moving contact blade of the incoming line static contact 204, and the moving contact blade 2 can be clamped by the conductive clamp 205.

[0032] like Figure 1 and Figure 3 As shown, a plurality of movable grooves 301 are provided on the top of the cover plate 3, and the movable grooves 301 can prevent the movable contact blade 2 from affecting the disassembly and assembly of the cover plate 3. A plurality of mounting bolts 302 are provided on both sides of the cover plate 3. The interior of the mounting bolts 302 is provided with grooves 303 that penetrate into the interior of the base plate 1. The mounting bolts 302 are used for fixed connection between the cover plate 3 and the base plate 1 to facilitate disassembly and assembly.

[0033] like Figure 2 and Figure 3 As shown, the push block 103 is movably connected to the bottom plate 1 through the adjustment slot 102, and the servo motor 104 drives the screw 105 to rotate, so that the push block 103 in the adjustment slot 102 moves up and down inside the bottom plate 1. The servo motor 104 is detachably connected to the mounting slot 101 through a fixing bolt, and a bearing is provided at the bottom end of the adjustment slot 102, and the bottom end of the screw 105 penetrates into the bearing, and the bearing makes the rotation of the screw 105 more stable. The side of the push block 103 close to the moving contact blade is a slope structure. Through the mutual cooperation of the push block 103 and the trapezoidal block 106, the moving contact blade 2 is pushed to rotate, and the moving contact blade 2 is automatically separated from the conductive clamp 205. A threaded hole matching the screw 105 is provided inside the push block 103, and the push block 103 is threadedly connected to the screw 105 through the threaded hole, which plays a role in limiting adjustment and provides power for the adjustment of the push block 103.

[0034] like Figure 1 and Figure 3As shown, the outgoing static contact 202 and the incoming static contact 204 are fixedly connected to the bottom plate 1 through the fixing groove 201, and the outgoing static contact 202 and the incoming static contact 204 are installed and fixed at the top and bottom of the bottom plate 1 through the fixing groove 201. The top and bottom of the bottom plate 1 are both provided with multiple groups of wiring holes for connecting the cable to the knife switch. The bottom end of the moving contact blade 2 is provided with a rotating shaft, and the two ends of the rotating shaft are respectively penetrated into the interior of the mounting block 203, so that the moving contact blade 2 and the mounting block 203 can rotate. The top of the moving contact blade 2 is provided with a push handle 206, and the conductive clamp 205 is close to the moving contact blade 2. A card slot is provided on one side of the contact blade, and the moving contact blade 2 is detachably connected to the conductive clamp 205 through the card slot. The moving contact blade 2 and the conductive clamp 205 can be disassembled and assembled through the card slot. A fastening bolt is provided on one side of the outgoing static contact 202 and the incoming static contact 204 to facilitate the connection and fixation of the cables. Arc grooves are provided on the top and bottom of the cover plate 3 to achieve a better installation effect of the cables. Threaded holes matching the grooves 303 are provided on both sides of the base plate 1. The cover plate 3 is detachably connected to the base plate 1 through the mounting bolts 302, and the cover plate 3 and the base plate 1 can be disassembled and assembled through the mounting bolts 302.

[0035] Working principle: Before use, the utility model installs the knife switch and then connects the cable to the knife switch. When in use, turn on the power supply. When leakage occurs and the knife switch needs to be disconnected urgently, start the servo motor 104, and the screw 105 is driven to rotate by the servo motor 104. The screw 105 cooperates with the threaded hole inside the push block 103, so that the push block 103 in the adjustment groove 102 moves upward inside the base plate 1, and the inclined surface of the push block 103 contacts the inclined surface of the trapezoidal block 106, thereby pushing the trapezoidal block 106 upward to the side away from the base plate, so that the moving contact blade 2 is separated from the conductive clamp 205, so that the knife switch can be automatically disconnected without manual intervention, making the knife switch safer and more protective.

Claims

1. A protective knife switch capable of automatically disconnecting, characterized in that: It comprises a base plate (1), a cover plate (3) located on one side of the base plate (1), and a plurality of groups of moving contact blades (2) located between the base plate (1) and the cover plate (3); The base plate (1) comprises: an adjustment slot (102) arranged inside the base plate (1), a mounting slot (101) arranged inside the base plate (1), and a servo motor (104) arranged inside the mounting slot (101); A push block (103) is arranged inside the adjustment groove (102), and the end surface of the push block (103) close to the moving contact blade is an inclined surface; The output end of the servo motor (104) is connected to a screw rod (105) that penetrates into the interior of the push block (103); A trapezoidal block (106) is provided on one side of the moving contact blade (2) close to the bottom plate.

2. The protective knife switch according to claim 1, characterized in that: The top and bottom of the base plate (1) are both provided with fixing grooves (201); the bottom of the base plate (1) is provided with a plurality of groups of outgoing static contacts (202); ends of the outgoing static contacts (202) close to the moving contact blades are provided with mounting blocks (203); the top of the base plate (1) is provided with a plurality of groups of incoming static contacts (204); and a conductive clamp (205) is provided on one side of the incoming static contacts (204) close to the moving contact blades.

3. The protective knife switch according to claim 2, characterized in that: The conductive clamp (205) is provided with a clamping slot, and the movable contact blade (2) is detachably connected to the conductive clamp (205) via the clamping slot.

4. The protective knife switch according to claim 3, characterized in that: A rotating shaft is provided at the bottom end of the moving contact blade (2), and both ends of the rotating shaft respectively penetrate into the interior of the mounting block (203).

5. The protective knife switch according to claim 4, characterized in that: The push block (103) is movably connected to the bottom plate (1) via the adjustment slot (102).

6. The protective knife switch according to claim 4, characterized in that: A bearing is provided at the bottom end of the adjustment groove (102), and the bottom end of the screw rod (105) penetrates into the interior of the bearing.

7. The protective knife switch according to claim 4, 5 or 6, characterized in that: A threaded hole matching the screw rod (105) is provided inside the push block (103), and the push block (103) is threadedly connected to the screw rod (105) via the threaded hole.

8. The protective knife switch according to claim 7, characterized in that: The top of the cover plate (3) is provided with a plurality of groups of movable grooves (301).

9. The protective knife switch according to claim 2 or 3 or 4 or 5 or 6 or 8, characterized in that: The outgoing line static contact (202) and the incoming line static contact (204) are respectively fixedly connected to the bottom plate (1) via the fixing grooves (201).

10. The protective knife switch according to claim 9, characterized in that: A push handle (206) is provided at the top end of the moving contact blade (2).

Images