Electrical insulation switch

Abstract

The utility model discloses an electrical insulation switch, which relates to the technical field of electrical switches and comprises a shell, the rear end of the inner side of the shell is fixedly connected with a mounting frame, the front side of the mounting frame is fixedly connected with a plurality of uniformly distributed arc extinguishing plates, every two adjacent arc extinguishing plates are connected through a copper sheet, and the bottom end of the inner side of the shell is provided with a telescopic groove. A plurality of evenly-distributed first springs are fixedly connected into the telescopic groove, the other end of each first spring is fixedly connected with a limiting block, the limiting blocks are slidably connected into the telescopic groove, a supporting plate is fixedly connected to the inner wall of the front side of the shell, and an electromagnetic coil is arranged at the upper end of the supporting plate; according to the utility model, through the arrangement of the arc extinguishing plate, the generation of electric arcs can be effectively inhibited when a circuit is disconnected, so that the risk of injury of the electric arcs to equipment and personnel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical switch technical field, concretely relates to a kind of electrical insulation switch. BACKGROUND

[0002] Electrical switch refers to the switch device that can be closed, load and open the current under normal circuit conditions, can automatically cut off the circuit when serious overload or short circuit and under-voltage fault occurs, and common switch includes lighting switch, push button switch, knife switch, iron shell switch and combination switch etc.

[0003] The pressure resistance of the insulating material used in traditional electrical switch is limited, which can easily lead to insulation damage, and further cause electric leakage and short circuit. Meanwhile, the fault current value can still be very large after power failure, which can discharge to air, and high fault current can cause spark or arc, increasing the risk of fire of surrounding combustible materials. Therefore, the electrical insulation switch is proposed to solve the above problems. SUMMARY

[0004] To solve the above technical problems, the electrical insulation switch is provided, which solves the problem of limited pressure resistance of the insulating material used in traditional electrical switch, which can easily lead to insulation damage, and further cause electric leakage and short circuit. Meanwhile, the fault current value can still be very large after power failure, which can discharge to air, and high fault current can cause spark or arc, increasing the risk of fire of surrounding combustible materials.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] An electrical insulation switch includes a housing, a mounting bracket is fixedly connected to the inner side of the rear end of the housing, a plurality of evenly distributed arc extinguishing plates are fixedly connected to the front side of the mounting bracket, two adjacent arc extinguishing plates are connected by a copper sheet, an expansion slot is formed in the inner bottom end of the housing, a plurality of evenly distributed first springs are fixedly connected inside the expansion slot, a limiting block is fixedly connected to the other end of the first spring, the limiting block is slidingly connected inside the expansion slot, a support plate is fixedly connected to the inner wall of the front side of the housing, an electromagnetic coil is arranged on the upper end of the support plate, a metal cylinder is arranged on the inner side of the upper end of the support plate, a connecting rod is fixedly connected to the lower end of the metal cylinder, a U-shaped push rod is fixedly connected to the other end of the connecting rod and penetrates through the upper end of the support plate, the end of the U-shaped push rod away from the connecting rod is fixedly connected to the upper end of the limiting block, a second spring is sleeved on the outer surface of the connecting rod, a second conductive block and a first terminal are fixedly connected to the inner wall of the front and rear of the housing respectively, a first terminal and a second terminal are arranged on the front end and the rear end of the housing respectively, the first terminal is electrically connected to the second conductive block, a first conductive block is electrically connected to one end of the electromagnetic coil, and the other end of the electromagnetic coil is electrically connected to the second terminal.

[0007] Preferably, the front end of the shell is fixedly connected with a telescopic cylinder, the inside of the telescopic cylinder is slidably connected with a pressing block, the front end of the pressing block is fixedly connected with a first button, the rear end of the first button is fixedly connected with a first pressing rod on the inside of the pressing block, the other end of the first pressing rod penetrates through the front end of the shell and is fixedly connected with a third conductive block, and the outer surface of the first pressing rod is sleeved with a third spring between the pressing block and the shell.

[0008] Preferably, the cross section of the first pressing rod is square.

[0009] Preferably, the upper end of the metal cylinder is fixedly connected with a second pressing rod, and the other end of the second pressing rod penetrates through the upper end of the shell and is fixedly connected with a second button.

[0010] Preferably, the shell is made of epoxy resin and glass fiber.

[0011] Preferably, the connecting rod and the U-shaped push rod are made of epoxy resin, and the pressing block, the first pressing rod, the second pressing rod, the supporting plate, the limiting block, the first button and the second button are all made of polyamide.

[0012] Preferably, the rear end of the shell is fixedly connected with a base, and mounting holes are formed through the front end of the base at the four corners.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses an electrical insulation switch, through setting up arc extinguishing plate, can effectively inhibit the generation of electric arc when circuit disconnects, thereby reducing the harm risk of electric arc to equipment and personnel, and button switch design is more labor saving, and use is more convenient, and the on-off of circuit can be realized quickly through pressing first button and second button, and the design of electromagnetic coil and metal cylinder can provide additional protection when short circuit, and automatic circuit is disconnected, and the damage to circuit is reduced, and the shell is made of epoxy resin and glass fiber composite material, has high strength insulation effect, helps to reduce the generation of electric leakage and short circuit phenomenon, and the pressing block, first pressing rod, second pressing rod, supporting plate, limiting block, first button and second button made of polyamide have better electric insulation performance, can improve the withstand voltage capacity of switch whole, and polyamide has higher mechanical strength and wear resistance, can bear greater pressure and impact, can ensure that switch is not easy to be damaged in frequent operation, and then the service life of switch is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2 It is the structural schematic diagram of the inside of the shell in the utility model;

[0017] Figure 3 It is the structure schematic view of metal cylinder in the utility model;

[0018] Figure 4 It is the structure schematic view of first conductive block and second conductive block in the utility model.

[0019] The figure mark is:

[0020] 1, shell;2, mounting frame;3, arc extinguishing plate;4, expansion slot;5, first spring;6, limit block;7, support plate;8, electromagnetic coil;9, metal cylinder;10, connecting rod;11, U-shaped push rod;12, second spring;13, first conductive block;14, second conductive block;15, first terminal;16, second terminal;17, telescopic cylinder;18, pressing block;19, first button;20, first pressing rod;21, third conductive block;22, third spring;23, second pressing rod;24, second button;25, base;26, mounting hole. Specific implementation

[0021] The following description is used to disclose the utility model so that those skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be thought of by those skilled in the art.

[0022] Referring to Figures 1-4 As shown in the figure, an electrical insulation switch includes a shell 1, the inner side rear end of the shell 1 is fixedly connected with a mounting frame 2, the front side of the mounting frame 2 is fixedly connected with a plurality of evenly distributed arc extinguishing plates 3, the adjacent two arc extinguishing plates 3 are connected through a copper sheet, the inner side bottom end of the shell 1 is provided with an expansion slot 4, the inside of the expansion slot 4 is fixedly connected with a plurality of evenly distributed first springs 5, the other end of the first spring 5 is fixedly connected with a limit block 6, the limit block 6 is slidingly connected in the inside of the expansion slot 4, the inner wall of the front side of the shell 1 is fixedly connected with a support plate 7, the upper end of the support plate 7 is provided with an electromagnetic coil 8, the upper end of the support plate 7 is provided with a metal cylinder 9 on the inner side of the electromagnetic coil 8, the lower end of the metal cylinder 9 is fixedly connected with a connecting rod 10, the other end of the connecting rod 10 penetrates through the upper end of the support plate 7 and is fixedly connected with a U-shaped push rod 11, the end of the U-shaped push rod 11 away from the connecting rod 10 is fixedly connected with the upper end of the limit block 6, the outer surface of the connecting rod 10 is sleeved with a second spring 12, the front and rear inner walls of the shell 1 are fixedly connected with a second conductive block 14 and a first terminal 15 respectively, the front end and the rear end of the shell 1 are provided with a first terminal 15 and a second terminal 16 respectively, the first terminal 15 is electrically connected with the second conductive block 14, the first conductive block 13 is electrically connected with one end of the electromagnetic coil 8, the other end of the electromagnetic coil 8 is electrically connected with the second terminal 16.

[0023] Further, the first connecting terminal 15 is an input terminal, and the second connecting terminal 16 is an output terminal.

[0024] Further, the front end of the shell 1 is fixedly connected with a telescopic cylinder 17, the inside of the telescopic cylinder 17 is slidably connected with a pressing block 18, the front end of the pressing block 18 is fixedly connected with a first button 19, the rear end of the first button 19 is fixedly connected with a first pressing rod 20 on the inside of the pressing block 18, the other end of the first pressing rod 20 penetrates through the front end of the shell 1 and is fixedly connected with a third conductive block 21, and the outer surface of the first pressing rod 20 is sleeved with a third spring 22 between the pressing block 18 and the shell 1.

[0025] Further, by pressing the first button 19, the first pressing rod 20 can push the third conductive block 21 to extrude the limiting block 6, so that the first spring 5 is compressed, when the third conductive block 21 moves to the rear end of the limiting block 6, the third conductive block 21 is in contact with the first conductive block 13 and the second conductive block 14, the circuit is in communication, and at the same time, the limiting block 6 will rebound and be clamped on the front side of the third conductive block 21 to limit the third conductive block 21.

[0026] Further, the two arc extinguishing plates 3 on the outside are respectively electrically connected with the first conductive block 13 and the second conductive block 14, when the electromagnetic coil 8 is in a short circuit state, the current generated will suddenly increase, at this time, the electromagnetic coil 8 will generate a magnetic force, thereby pushing the metal cylinder 9 to press down, and then pushing the limiting block 6 through the U-shaped push rod 11 to extrude the first spring 5, so that the limiting block 6 releases the limiting of the third conductive block 21, at this time, the third conductive block 21 will rebound under the action of the third spring 22, thereby breaking the circuit, at the moment when the circuit is broken, the released current is in contact with the air through the arc extinguishing plate 3, the arc extinguishing plate 3 quickly suppresses and extinguishes the arc by increasing the arc path and the cooling effect, thereby preventing the continuous generation of the arc and causing other safety hazards.

[0027] Further, the cross section of the first pressing rod 20 is a square, which can limit the third conductive block 21, so as to avoid the rotation of the third conductive block 21 during movement, thereby ensuring the smooth communication of the circuit.

[0028] Further, the upper end of the metal cylinder 9 is fixedly connected with a second pressing rod 23, the other end of the second pressing rod 23 penetrates through the upper end of the shell 1 and is fixedly connected with a second button 24, by pressing the second button 24, the metal cylinder 9 can be pushed to press down, thereby manually breaking the circuit.

[0029] Further, the shell 1 is made of epoxy resin and glass fiber, the composite material of the epoxy resin and the glass fiber has high mechanical strength, can withstand external pressure and impact, protects the internal components, and at the same time provides high insulation performance, which is helpful to prevent current leakage and ensure safe operation.

[0030] Further, the connecting rod 10 and the U-shaped push rod 11 are made of epoxy resin, the pressing block 18, the first pressing rod 20, the second pressing rod 23, the supporting plate 7, the limiting block 6, the first button 19 and the second button 24 are made of polyamide, the pressing block 18, the first pressing rod 20, the second pressing rod 23, the supporting plate 7, the limiting block 6, the first button 19 and the second button 24 made of polyamide have good electrical insulation performance, which can improve the voltage resistance of the switch as a whole, meanwhile, polyamide has high mechanical strength and wear resistance, can withstand large pressure and impact, can ensure that the switch is not easy to be damaged in frequent operation, thereby prolonging the service life of the switch.

[0031] Further, the rear end of the shell 1 is fixedly connected with a base 25, and mounting holes 26 are formed in the front end of the base 25.

[0032] Working principle: first, the base 25 is fixed in the predetermined mounting position through the threaded connecting piece, then the first wiring terminal 15 and the second wiring terminal 16 are connected with the power supply and the load respectively, when the equipment needs to be started, the first button 19 is pressed to make the first pressing rod 20 push the third conductive block 21 to extrude the limiting block 6, so that the first spring 5 is compressed, when the third conductive block 21 moves to the rear end of the limiting block 6, the third conductive block 21 is in contact with the first conductive block 13 and the second conductive block 14, the circuit is connected, and the limiting block 6 will rebound and be clamped on the front side of the third conductive block 21 to limit the third conductive block 21, in the normal working state, the current passes through the switch to supply power to the load, the electromagnetic coil 8 passes through the uniform current, if the circuit is short-circuited, the current will increase sharply, the electromagnetic coil 8 will generate strong magnetic force, thereby pushing the metal cylinder 9 to press down, and then pushing the limiting block 6 to extrude the first spring 5 through the U-shaped push rod 11, so that the limiting block 6 releases the limiting of the third conductive block 21, under the action of the third spring 22, the third conductive block 21 rebounds rapidly to disconnect the circuit, and the current is cut off, at this time, the released current passes through the arc extinguishing plate 3 and contacts with the air, the arc extinguishing plate 3 quickly suppresses and extinguishes the electric arc through increasing the electric arc path and the cooling effect, prevents further safety hazards, in the use process, the user can manually press the second button 24 to push the metal cylinder 9 to press down, so as to directly cut off the circuit without relying on the short-circuit protection mechanism.

[0033] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, the above examples and descriptions in the specification are only the principles of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims

1. An electrical insulation switch, characterized in that, The enclosure includes an outer shell (1), with a mounting bracket (2) fixedly connected to the rear end of the inner side of the outer shell (1). Several evenly distributed arc-extinguishing plates (3) are fixedly connected to the front side of the mounting bracket (2). Two adjacent arc-extinguishing plates (3) are connected by copper sheets. A telescopic groove (4) is provided at the bottom inner side of the outer shell (1). Several evenly distributed first springs (5) are fixedly connected inside the telescopic groove (4). The other end of the first spring (5) is fixedly connected to a limit block (6). The limit block (6) is slidably connected inside the telescopic groove (4). A support plate (7) is fixedly connected to the inner wall of the front side of the outer shell (1). An electromagnetic coil (8) is provided at the upper end of the support plate (7). A metal cylinder (9) is provided at the upper end of the support plate (7) inside the electromagnetic coil (8). The lower end of the metal cylinder (9) is fixed. A connecting rod (10) is connected, and the other end of the connecting rod (10) passes through the upper end of the support plate (7) and is fixedly connected to a U-shaped push rod (11). The end of the U-shaped push rod (11) away from the connecting rod (10) is fixedly connected to the upper end of the limiting block (6). A second spring (12) is sleeved on the outer surface of the connecting rod (10). A second conductive block (14) and a first terminal (15) are fixedly connected to the front and rear inner walls of the outer shell (1), respectively. A first terminal (15) and a second terminal (16) are respectively provided at the front and rear ends of the outer shell (1). The first terminal (15) is electrically connected to the second conductive block (14). The first conductive block (13) is electrically connected to one end of the electromagnetic coil (8). The other end of the electromagnetic coil (8) is electrically connected to the second terminal (16).

2. The electrical insulation switch according to claim 1, characterized in that: The front end of the outer shell (1) is fixedly connected to a telescopic cylinder (17), and a pressing block (18) is slidably connected inside the telescopic cylinder (17). The front end of the pressing block (18) is fixedly connected to a first button (19), and the rear end of the first button (19) is located inside the pressing block (18) and is fixedly connected to a first pressing rod (20). The other end of the first pressing rod (20) passes through the front end of the outer shell (1) and is fixedly connected to a third conductive block (21). The outer surface of the first pressing rod (20) is fitted with a third spring (22) between the pressing block (18) and the outer shell (1).

3. An electrical insulation switch according to claim 2, characterized in that: The first pressing rod (20) has a square cross-section.

4. An electrical insulation switch according to claim 1, characterized in that: The upper end of the metal cylinder (9) is fixedly connected to a second pressing rod (23), and the other end of the second pressing rod (23) passes through the upper end of the outer shell (1) and is fixedly connected to a second button (24).

5. An electrical insulation switch according to claim 1, characterized in that: The outer shell (1) is made of epoxy resin and glass fiber composite.

6. An electrical insulation switch according to claim 1, characterized in that: The connecting rod (10) and the U-shaped push rod (11) are made of epoxy resin, and the pressing block (18), the first pressing rod (20), the second pressing rod (23), the support plate (7), the limiting block (6), the first button (19), and the second button (24) are all made of polyamide.

7. An electrical insulation switch according to claim 1, characterized in that: The rear end of the outer shell (1) is fixedly connected to a base (25), and mounting holes (26) are provided through the four corners of the front end of the base (25).

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