Multifunctional fuse

Abstract

The utility model relates to the technical field of fuses, and particularly discloses a multifunctional fuse, which comprises a packaging shell, a fuse packaged in the packaging shell, a slide rheostat and an electromagnet, the slide rheostat comprises a support, a polished rod, a resistance adjusting copper sheet, a constantan wire coil, a connector A and a connector B, wherein the connector A and the connector B are connected to the head end and the tail end of the constantan wire coil. According to the device, the fuse is connected with the slide rheostat in series, the surge current can be reduced by using the large resistance value of the slide rheostat at the starting moment of equipment, the surge current is well inhibited, the slide rheostat reduces the resistance value of the slide rheostat after the equipment is started, unnecessary power loss is reduced, and meanwhile the electromagnet loses power when the equipment is shut down. The resilience force of the spring drives the magnetic metal plate and the resistance adjusting copper sheet to integrally return to the initial position, manual resistance adjustment is not needed, and the automation effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of fuses, and more specifically, to multifunctional fuses. Background Technology

[0002] Currently, a surge current is generated when the equipment is first started. Although the current will stabilize after the equipment stabilizes, the surge current at the moment of startup can easily cause the fuse in the equipment to trip accidentally. To avoid this situation, a set of high-value resistors is connected in series in front of the fuse to reduce the impact of surge current on the fuse. However, after the equipment is running normally, the current is basically stable, and the high-value resistor will continue to consume power, which undoubtedly increases the loss. Therefore, we propose a multi-functional fuse. Utility Model Content

[0003] In view of the above-mentioned technical problems in related technologies, this utility model provides a multifunctional fuse that can solve the above problems.

[0004] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0005] The multi-functional fuse includes a housing, a fuse encapsulated inside the housing, a sliding rheostat, and an electromagnet. The fuse and the sliding rheostat are connected in series. The sliding rheostat includes a bracket, a guide rod, a resistance adjustment copper strip, a constantan wire roll, and connectors A and B connected to the two ends of the constantan wire roll. A magnetic metal plate is provided at one end of the resistance adjustment copper strip. The top of the magnetic metal plate is connected to the top of the bracket via a spring. The electromagnet is fixed to one side of the bottom of the bracket and is located directly below the magnetic metal plate.

[0006] Furthermore, electrodes A and B are respectively provided at the top and bottom of the fuse. Electrode B is connected to the connector at the top of the optical rod. Connector A is located directly above connector B. Electrode C is fixedly installed on connector B. Electrode A extends out of the top of the encapsulation shell, and electrode C extends out of the bottom of the encapsulation shell.

[0007] Furthermore, a bushing is fitted in the middle of the rod, and there are two resistance adjustment copper plates. Both resistance adjustment copper plates are fixed to the surface of the bushing, and the two resistance adjustment copper plates are respectively attached to the front and rear sides of the constantan wire coil.

[0008] Furthermore, the magnetic metal plate and the resistance adjustment copper sheet are symmetrically arranged about the left and right sides of the bushing, and the large-area end face of the magnetic metal plate is horizontally arranged.

[0009] Furthermore, the electromagnet is electrically connected to a power line, which extends out of the bottom of the package.

[0010] Furthermore, both connector A and the connector at the bottom of the bare rod are fitted with insulating sleeves.

[0011] The beneficial effects of this utility model are as follows: The fuse of this application device is connected in series with the sliding rheostat. At the moment of device startup, the large resistance value of the sliding rheostat can be used to reduce the surge current, effectively suppressing the surge current. After startup, the electromagnet will also be energized and obtain magnetic force. The position of the resistance adjustment copper sheet is adjusted by the electromagnet attracting the magnetic metal plate. Thus, after the surge current is eliminated when the device is powered on, the resistance value of the sliding rheostat is reduced, reducing unnecessary power loss. At the same time, when the device is powered off, the electromagnet is de-energized, and the spring return force drives the magnetic metal plate and the resistance adjustment copper sheet to return to their initial positions as a whole. There is no need for manual adjustment of the resistance value, achieving an automated effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of a multi-functional fuse when the encapsulation shell is removed;

[0015] Figure 2 This is a cross-sectional view of a multi-functional fuse.

[0016] In the picture:

[0017] 1. Fuse; 2. Sliding rheostat; 201. Bracket; 202. Smooth rod; 203. Resistance adjustment copper strip; 204. Constantan wire coil; 205. Connector A; 206. Connector B; 3. Spring; 4. Magnetic metal plate; 5. Electromagnet; 501. Power cord; 6. Electrode C; 7. Encapsulation shell. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0019] like Figure 1-2As shown, this utility model discloses a multifunctional fuse, including a housing 7, a fuse 1 encapsulated inside the housing, a sliding rheostat 2, and an electromagnet 5. The fuse 1 and the sliding rheostat 2 are connected in series. The sliding rheostat 2 includes a bracket 201, a guide rod 202, a resistance adjustment copper strip 203, a constantan wire roll 204, and connectors A205 and B206 connected to the two ends of the constantan wire roll 204. The guide rod 202 is a conductive rod. The two ends of the constantan wire roll 204 are fixed to the inside of the bracket 201 by ceramic pillars. A magnetic metal plate 4 is provided at one end of the resistance adjustment copper strip 203. The top end of the magnetic metal plate 4 is connected to the top end of the bracket 201 by a spring 3. The electromagnet 5 is fixed to one side of the bottom end of the bracket 201. The bracket 201 is made of polyamide (PA) material, and the electromagnet 5 is located directly below the magnetic metal plate 4.

[0020] Example 1: Fuse 1 is an existing glass fuse tube. The overall function and structure of the sliding rheostat 2 are the same as the existing sliding rheostat, except that the constantan wire coil 204 is designed to be flat. Thus, the resistance adjustment copper plate 203 can be moved up and down a short distance to switch between large and small resistance values. The electromagnet 5 gains magnetic force when energized and loses magnetic force when de-energized. The distance from the top of the electromagnet 5 to the magnetic metal plate 4 is set to 10mm. The spring force coefficient of the spring 3 is determined through experiments to ensure that the electromagnet 5 can attract the magnetic metal plate 4 when energized, and the spring 3 can pull the resistance adjustment copper plate 203 to lift and reset when the electromagnet 5 is de-energized.

[0021] In the preferred technical solution, the fuse 1 is provided with electrode A and electrode B at the top and bottom respectively. Electrode B is connected to the connector at the top of the light rod 202. Connector A205 is located directly above connector B206. Electrode C6 is fixedly installed on connector B206. Electrode A extends out of the top of the encapsulation shell 7, and electrode C6 extends out of the bottom of the encapsulation shell 7. The electrodes extending from the top and bottom of the encapsulation shell 7 are used to be connected in series in the circuit.

[0022] In the preferred technical solution, a bushing is fitted in the middle of the optical rod 202, and there are two resistance adjustment copper plates 203. Both resistance adjustment copper plates 203 are fixed to the surface of the bushing, and the two resistance adjustment copper plates 203 are respectively attached to the front and rear sides of the constantan wire roll 204. The two resistance adjustment copper plates 203 can improve the stability of contact on the surface of the constantan wire roll 204.

[0023] In the preferred technical solution, the magnetic metal plate 4 and the resistance adjustment copper sheet 203 are symmetrically arranged about the left and right sides of the bushing. The connection between the magnetic metal plate 4 and the bushing is insulated. For example, the side of the bushing facing the magnetic metal plate 4 is hot-melted to form an insulating adhesive layer, and the side of the magnetic metal plate 4 is also hot-melted to form an insulating adhesive layer. The large end face of the magnetic metal plate 4 is horizontally arranged to facilitate magnetic attraction with the electromagnet 5.

[0024] In the preferred technical solution, the electromagnet 5 is electrically connected to a power line 501, which extends out of the bottom of the encapsulation shell 7 to facilitate connection of the circuit of the electromagnet 5.

[0025] In the preferred technical solution, both the connector A205 and the connector at the bottom of the bare rod 202 are fitted with insulating sleeves to avoid short-circuit contact problems.

[0026] In practical use, the electrodes at the top and bottom of the encapsulation shell 7 are connected in series in the circuit. The electromagnet 5 is powered on when the equipment is turned on and off when the equipment is turned off. When the equipment is turned off, the magnetic metal plate 4 is in the high position. At this time, the resistance of the sliding rheostat 2 is the section from connector B206 to the resistance adjustment copper piece 203, which has a relatively large resistance. This is used to reduce the impact of surge current on the fuse when the equipment is turned on. Since the electromagnet 5 is also powered on when the equipment is turned on, but the response time of the electromagnet 5 is longer than the generation time of the surge current. Because of its long resistance, after the electromagnet 5 is energized and started, the surge current in the circuit has been consumed by the high-resistance sliding rheostat 2. Subsequently, the electromagnet 5 attracts the magnetic metal plate 4, causing the resistance adjustment copper strip 203 to drop, thereby reducing the resistance of the sliding rheostat 2 and reducing unnecessary energy consumption. In other words, this fuse integrated structure can keep the sliding rheostat at a high resistance when the equipment is turned on, reducing the impact of surge current. In avoiding surge current problems, it can reduce the resistance of the sliding rheostat when the equipment is stable, reducing unnecessary energy consumption.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-functional fuse, characterized in that, The device includes a housing (7), a fuse (1) encapsulated inside the housing, a sliding rheostat (2) and an electromagnet (5). The fuse (1) is connected in series with the sliding rheostat (2). The sliding rheostat (2) includes a bracket (201), a rod (202), a resistance adjustment copper plate (203), a constantan wire roll (204) and connectors A (205) and B (206) connected to the two ends of the constantan wire roll (204). A magnetic metal plate (4) is provided at one end of the resistance adjustment copper plate (203). The top of the magnetic metal plate (4) is connected to the top of the bracket (201) by a spring (3). The electromagnet (5) is fixed to one side of the bottom end of the bracket (201). The electromagnet (5) is located directly below the magnetic metal plate (4).

2. The multifunctional fuse according to claim 1, characterized in that, The fuse (1) is provided with electrodes A and B at its top and bottom respectively. Electrode B is connected to the connector at the top of the light rod (202). Connector A (205) is located directly above connector B (206). Electrode C (6) is fixedly installed on connector B (206). Electrode A extends out of the top of the encapsulation shell (7), and electrode C (6) extends out of the bottom of the encapsulation shell (7).

3. The multifunctional fuse according to claim 1, characterized in that, The optical rod (202) is fitted with a bushing in the middle. There are two resistance adjustment copper plates (203). Both resistance adjustment copper plates (203) are fixed to the surface of the bushing. The two resistance adjustment copper plates (203) are respectively attached to the front and rear sides of the constantan wire roll (204).

4. The multifunctional fuse according to claim 3, characterized in that, The magnetic metal plate (4) and the resistance adjustment copper sheet (203) are symmetrically arranged about the bushing, and the large-area end face of the magnetic metal plate (4) is horizontally arranged.

5. The multifunctional fuse according to claim 1, characterized in that, The electromagnet (5) is electrically connected to a power line (501), which extends out of the bottom of the encapsulation shell (7).

6. The multifunctional fuse according to claim 1, characterized in that, Both the connector A (205) and the connector at the bottom of the bare rod (202) are fitted with insulating sleeves.

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