Arc suppression device for electrical distribution box

Abstract

The utility model discloses distribution box fire -proof electric arc suppression device belongs to distribution box technical field, including input, static contact, movable contact, lead arc conductor, output wire, resistance, electric capacity and input wire, and lead arc conductor sets up between static contact and movable contact, and the resistance and electric capacity series connection form resonant circuit, and resonant circuit is connected to output wire, and input wire connects resonant circuit and electrically connected back input. The utility model through resonant circuit consumption electric arc energy, through the sliding fixed mechanism flexible adjustment installation position, solved the slow arc extinguishing in the prior art, energy consumption is not sufficient and the fixed installation structure, and the problem that suitability is not good, has the advantages such as arc -extinguishing fast, high safety, flexible installation.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, and in particular to a fireproof arc suppression device for distribution boxes. Background Technology

[0002] Distribution boxes are important devices in power systems used for power distribution, control, metering, and protection circuits. Inside a distribution box, there are usually circuit breakers and switching elements. When these elements break or close the circuit, especially when carrying large currents or when a short circuit fault occurs, an electric arc will inevitably be generated between their moving and stationary contacts.

[0003] An electric arc is a high-temperature, high-energy plasma discharge phenomenon. The generation and continuous burning of an electric arc can cause severe erosion of the contact surface, shortening the service life of the equipment. More seriously, the large amount of heat released by the electric arc can rapidly increase the internal temperature of the distribution box, damaging the circuit insulation and easily causing electrical fires, posing a huge threat to electrical safety.

[0004] Therefore, how to quickly and effectively suppress and extinguish electric arcs is a key issue in the fire safety technology of distribution boxes. Although existing distribution box devices are equipped with arc-extinguishing structures, such as using air to elongate the arc or simple arc-extinguishing grids, these passive methods have limited speed of energy consumption when the arc energy is large. The arc extinguishing is not fast or thorough enough, and the arc energy is not fully consumed, leaving the risk of arc reignition and continuous heating, resulting in poor fire suppression effect.

[0005] Therefore, this utility model proposes a fireproof arc suppression device for distribution boxes to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems of existing fire-resistant arc suppression devices for distribution boxes, such as insufficient and incomplete arc extinguishing, inadequate energy consumption, safety hazards, fixed installation structure, difficulty in flexible adjustment according to actual installation conditions, and poor applicability, this utility model aims to provide a fire-resistant arc suppression device for distribution boxes with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a fireproof arc suppression device for a distribution box, comprising: an input terminal; a stationary contact electrically connected to the input terminal; a moving contact for detachably contacting the stationary contact; and an output terminal electrically connected to the moving contact.

[0008] The device also includes an arc-starting conductor, output wires, resistors, capacitors, and input wires.

[0009] The arc-initiating conductor is positioned between the stationary and moving contacts to accurately guide the arc when the contacts separate. One end of the output wire is connected to the arc-initiating conductor to draw the arc energy to the arc-extinguishing circuit. A resistor and a capacitor are connected in series to form a resonant circuit, which is connected to the other end of the output wire. The resonant circuit is a structure that consumes arc energy. The input wire is connected to the output end of the resonant circuit and then back to the input end, forming a complete electrical bypass for suppressing the arc.

[0010] Preferably, the fireproof arc suppression device for the distribution box also includes a protective shell, which covers the outside of the output wires and input wires, providing physical protection and insulation for the external wiring of the arc extinguishing circuit, preventing it from being exposed and causing short circuits or damage.

[0011] Preferably, the fireproof arc suppression device for the distribution box also includes a sliding fixing mechanism, which is fixed to the rear side of the input end to enable flexible adjustment of the overall installation position of the device to adapt to different installation environments.

[0012] Furthermore, the sliding fixing mechanism includes a housing, a horizontal plate, and balls disposed between the housing and the horizontal plate. The housing serves as a fixing base and has a groove on it. The balls are rotatably accommodated in the groove. The horizontal plate serves as a load-bearing component and forms a sliding connection with the housing through these balls, so that the horizontal plate can stably slide up and down on the housing within the path defined by the groove.

[0013] Preferably, the sliding fixing mechanism further includes a fixing block, which is fixedly connected to the horizontal plate and moves together with the horizontal plate. The fixing block is used to fix the entire device to the distribution box or other mounting surface.

[0014] Furthermore, the fixing block has holes and a connecting post integrally formed on it. The holes and the connecting post work together to provide a reliable and convenient installation interface, making it easy for users to install and fix the block using bolts or other fasteners.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model, by setting up an arc-initiating conductor, an output wire, a resistor, a capacitor, and an input wire, wherein the resistor and capacitor are connected in series to form a resonant circuit, when an electric arc is generated, the electric arc is introduced into the resonant circuit through the arc-initiating conductor to consume energy, which solves the problems of slow arc extinguishing speed, insufficient energy consumption, and safety hazards in the prior art, and achieves the technical effects of rapidly consuming electric arc energy, accelerating arc extinguishing, and improving the reliability of circuit breaking.

[0017] 2. This utility model, by setting a sliding fixing mechanism, includes a shell with a groove, a ball bearing housed in the groove, and a horizontal plate slidably connected to the shell through the ball bearing. The horizontal plate is also provided with a fixing block. This solves the problem in the prior art that the installation structure of the distribution box device is fixed, and the position cannot be flexibly adjusted according to the actual situation, resulting in low equipment utilization. It achieves the technical effect of enabling the device to slide up and down on the shell, improving the convenience of equipment installation and the flexibility of use. Attached Figure Description

[0018] Figure 1 This is a perspective view of the front side of the protective shell of the fireproof arc suppression device for the distribution box proposed in this utility model;

[0019] Figure 2 This is a partial structural breakdown diagram of the moving contact of the fireproof arc suppression device for distribution boxes proposed in this utility model;

[0020] Figure 3 This is a partial structural diagram of the horizontal plate of the fireproof arc suppression device for the distribution box proposed in this utility model;

[0021] Figure 4 This is a partial structural diagram of the ball bearing of the fireproof arc suppression device for the distribution box proposed in this utility model.

[0022] Legend:

[0023] 1. Input terminal; 2. Sliding fixing mechanism; 201. Housing; 202. Horizontal plate; 203. Fixing block; 204. Hole; 205. Connecting post; 206. Groove; 207. Ball bearing; 3. Stationary contact; 4. Moving contact; 5. Output terminal; 6. Arc ignition conductor; 7. Output wire; 8. Resistor; 9. Capacitor; 10. Input wire; 11. Protective shell. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please refer to Figures 1 to 4 This utility model provides a fireproof arc suppression device for a distribution box, including an input terminal 1 and a stationary contact 3 electrically connected to the input terminal 1. The stationary contact 3 is used to detachably contact a moving contact 4, and the moving contact 4 is electrically connected to an output terminal 5.

[0027] The fireproof arc suppression device for the distribution box also includes an arc-initiating conductor 6, which is located between the stationary contact 3 and the moving contact 4 to guide the arc. One end of the output wire 7 is connected to the arc-initiating conductor 6. The resistor 8 and the capacitor 9 are connected in series to form a resonant circuit. The resonant circuit is connected to the other end of the output wire 7. The input wire 10 is connected to the resonant circuit and electrically connected back to the input terminal 1.

[0028] The fireproof arc suppression device for the distribution box also includes a protective housing 11, which covers the outside of the output wire 7 and the input wire 10.

[0029] Please refer to Figure 3 and Figure 4 The sliding fixing mechanism 2 includes a housing 201, a horizontal plate 202, and a ball 207 disposed between the housing 201 and the horizontal plate 202; a groove 206 is provided on the housing 201, and the ball 207 is rotatably accommodated in the groove 206; the horizontal plate 202 is slidably connected to the housing 201 through the ball 207.

[0030] The sliding fixing mechanism 2 also includes a fixing block 203, which is fixedly connected to the horizontal plate 202; the fixing block 203 has a hole 204; and the fixing block 203 is also integrally provided with a connecting column 205.

[0031] In a preferred embodiment, in order to protect the safety of the internal wiring, the fireproof arc suppression device for the distribution box also includes a protective shell 11, which covers the outside of the output wire 7 and the input wire 10.

[0032] As another preferred embodiment, in order to improve the flexibility and adaptability of installation, the fireproof arc suppression device for the distribution box also includes a sliding fixing mechanism 2, which is fixed to the rear side of the input end 1.

[0033] As a further limitation on the sliding fixing mechanism 2, please refer to Figure 3 and Figure 4 The sliding fixing mechanism 2 includes a housing 201, a horizontal plate 202, and a ball bearing 207 disposed between the housing 201 and the horizontal plate 202; a groove 206 is provided on the housing 201, and the ball bearing 207 is rotatably accommodated in the groove 206; the horizontal plate 202 is slidably connected to the housing 201 through the ball bearing 207, thereby allowing the horizontal plate 202 to slide up and down on the housing 201 for adjustment;

[0034] As a further limitation of the sliding fixing mechanism 2, the sliding fixing mechanism 2 also includes a fixing block 203, which is fixedly connected to the horizontal plate 202; in order to facilitate installation and fixing, the fixing block 203 is provided with a hole 204; and a connecting column 205 is integrally provided on the fixing block 203.

[0035] Working principle: When current enters from input terminal 1 and stationary contact 3 into moving contact 4 and output terminal 5, when stationary contact 3 and moving contact 4 separate, the generated electric arc enters the output wire 7 through the arc-initiating conductor 6. Through the resonant circuit composed of resistor 8 and capacitor 9, the electric arc energy is further consumed, accelerating the extinction of the electric arc. Finally, it is output from input wire 10. The output wire 7 and input wire 10 are protected by a protective shell 11. Their synergistic effect realizes the rapid extinction of the electric arc and the reliable disconnection of the circuit.

[0036] During installation and adjustment, the sliding fixing mechanism 2 is located at the rear of the input end 1. The sliding fixing mechanism 2 includes a housing 201. A ball bearing 207 is placed in a groove 206 on the housing 201. The ball bearing 207 is connected to a horizontal plate 202. There is a fixing block 203 on the horizontal plate 202. The hole 204 and the connecting post 205 on the fixing block 203 are used for fixing. Through the cooperation of the ball bearing 207 and the groove 206, the horizontal plate 202 slides up and down on the housing 201. It can be changed according to the actual situation, which solves the problem of fixed installation structure and poor applicability, and improves the utilization rate of equipment.

Claims

1. A fireproof arc suppression device for a distribution box, comprising: Input terminal (1) and stationary contact (3) are electrically connected to the input terminal (1), moving contact (4) is used to detachably contact the stationary contact (3), and output terminal (5) is electrically connected to the moving contact (4). The fire-resistant arc suppression device for the distribution box is characterized by further comprising: an arc-initiating conductor (6), which is disposed between the stationary contact (3) and the moving contact (4) for guiding the arc; an output wire (7), one end of which is connected to the arc-initiating conductor (6); a resistor (8) and a capacitor (9), which are connected in series to form a resonant circuit, and the resonant circuit is connected to the other end of the output wire (7); An input wire (10) is connected to the resonant circuit and electrically connected back to the input terminal (1).

2. The fireproof arc suppression device for distribution boxes according to claim 1, characterized in that, The fireproof arc suppression device for the distribution box also includes a protective shell (11); The protective shell (11) covers the outside of the output wire (7) and the input wire (10).

3. The fireproof arc suppression device for distribution boxes according to claim 1, characterized in that, The fireproof arc suppression device for the distribution box also includes a sliding fixing mechanism (2); The sliding fixing mechanism (2) is fixed to the rear side of the input end (1).

4. The fireproof arc suppression device for distribution boxes according to claim 3, characterized in that, The sliding fixing mechanism (2) includes a housing (201), a horizontal plate (202), and ball bearings (207) disposed between the housing (201) and the horizontal plate (202).

5. The fireproof arc suppression device for distribution boxes according to claim 4, characterized in that, The outer shell (201) has a groove (206) and the ball (207) is rotatably accommodated in the groove (206); the horizontal plate (202) is slidably connected to the outer shell (201) through the ball (207).

6. The fireproof arc suppression device for distribution boxes according to claim 4, characterized in that, The sliding fixing mechanism (2) further includes a fixing block (203); The fixing block (203) is fixedly connected to the horizontal plate (202).

7. The fireproof arc suppression device for distribution boxes according to claim 6, characterized in that, The fixing block (203) has holes (204).

8. The fireproof arc suppression device for distribution boxes according to claim 7, characterized in that, The fixing block (203) is also integrally provided with a connecting column (205).

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