Power-off device based on fusible metal temperature sensing

Abstract

The utility model discloses a power-off device based on fusible metal temperature sensing, which comprises a shell arranged on an electric wire, a grain groove used for fixing a fire extinguishing agent grain is arranged in the shell, the top of the grain groove is open, the electric wire is positioned above the grain groove, the fire extinguishing agent grain is contacted with an electronic ignition head, the electronic ignition head is connected with one end of a starting wire harness, and the other end of the starting wire harness is connected with a power supply. The other end of the starting wire harness is connected with a power supply, the surface of the shell is provided with a blow-off port, a circuit of the starting wire harness in the temperature sensing area is disconnected, and fusible metal in contact with the wire is arranged above the circuit; according to the utility model, when a fire occurs, the fire extinguishing agent grain is ignited through the melting process of the fusible metal, so that the circuit breaking process of the electric wire can be quickly carried out, and no danger exists in the circuit breaking process, so that the life safety is ensured, and the timely and effective power failure can be realized; and meanwhile, the fire extinguishing substance can be sprayed out from the spraying opening to extinguish the fire in the peripheral area of the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of power-off devices, in particular to a power-off device based on fusible metal temperature sensing. Background Art

[0002] At present, after an electrical fire occurs, people often have accidents in operation due to tension and panic. For fires with small fires and small fire areas, fire-fighting equipment can be used on the spot to extinguish the fire and disconnect the power supply close to the fire source. When disconnecting the power supply, the circuit breaker must be cut off first, and then the isolating switch or knife switch is cut off. The steps are relatively cumbersome and dangerous. When the fire is very fierce, there is no time to cut off the power supply with a switch. At this time, the wires can be cut short or the wires can be made to have an effect of no power. However, there will be greater danger in the process of cutting off the power supply. Therefore, how to relatively ensure life safety and be able to cut off the power supply in a timely and effective manner is a big problem.

[0003] With the continuous development of society, the types and quantity of various electrical appliances are gradually increasing. Most electrical appliances need to be kept in a long-term standby state when working. Electrical appliances will generate high temperatures when powered on. As electrical appliances age, they are very likely to cause electrical fires due to short circuit problems. In addition to timely extinguishing the fire after an electrical appliance catches fire, the power supply should be cut off immediately. If the fire is extinguished when the electrical equipment is powered on, it will be difficult to extinguish the fire, and it is easy for people to get electric shocks and electrical appliances to explode during the rescue process.

[0004] In actual scenarios, electrical fires may cause large fires, making it difficult or impossible to cut off power in time, which greatly increases the difficulty of firefighting. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a power-off device based on fusible metal temperature sensing to solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a power-off device based on fusible metal temperature sensing, including a shell arranged on the electric wire, a powder column groove for fixing the fire extinguishing agent column is provided in the shell, the top of the powder column groove is open and the electric wire is located above the powder column groove, the fire extinguishing agent column is in contact with the electronic ignition head, the electronic ignition head is connected to one end of the starting harness, and the other end of the starting harness is connected to the power supply, a discharge port is provided on the surface of the shell, the line of the starting harness located in the temperature sensing area is disconnected, and a fusible metal in contact with the electric wire is provided above.

[0007] Preferably, the housing comprises an upper shell and a lower shell, and one side of the upper shell is hinged to one side of the lower shell.

[0008] Preferably, a groove matching the electric wire is provided at the contact position between the upper shell and the lower shell.

[0009] Preferably, a rubber layer is fixedly provided at the groove position.

[0010] Preferably, a positioning groove matching the electric wire is provided at the top of the drug column groove.

[0011] Preferably, the fire extinguishing agent charge is a charge structure formed by pressing aerosol generating agent powder.

[0012] Preferably, the space between the shell and the drug column groove is also filled with a coolant.

[0013] Preferably, a charge column groove is provided in the upper shell, a base is provided in the lower shell, a stepped groove is opened inside the base, the fusible metal is limited at the top of the stepped groove, and a starting harness for line disconnection is provided at the bottom of the stepped groove.

[0014] Preferably, a cavity for installing a power source is provided between the bottom of the base and the bottom of the lower shell.

[0015] Preferably, a threading hole for threading electric wires is provided inside the fusible metal.

[0016] Beneficial effects of the utility model:

[0017] When a fire occurs, the utility model device can ignite the fire extinguishing agent column through the melting process of the fusible metal, so that the electric wire can be quickly disconnected, and there will be no danger during the disconnection process, thereby ensuring life safety and being able to cut off the power in a timely and effective manner; at the same time, the fire extinguishing material can be sprayed out from the discharge port to extinguish the fire in the outer area of ​​the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a power-off device based on fusible metal temperature sensing;

[0019] Figure 2 for Figure 1 A front view schematic diagram of the structure of the upper shell and the lower shell in cooperation;

[0020] Figure 3 for Figure 1 A right view structural diagram of ;

[0021] Figure 4 It is a schematic diagram of the installation structure of the drug column groove in the upper shell;

[0022] Figure 5 It is a schematic diagram of the installation structure of the fusible metal in the lower shell;

[0023] Figure 6This is a schematic diagram of the circuit structure where the start harness is located;

[0024] Figure 7 Schematic diagram of the structure of fusible metal. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1-7 As shown, a power-off device based on fusible metal temperature sensing includes a shell 1 arranged on an electric wire 2, a powder column groove 4 for fixing a fire extinguishing agent column 3 is provided in the shell 1, the top of the powder column groove 4 is open and the electric wire 2 is located above the powder column groove 4, the fire extinguishing agent column 3 is in contact with an electronic ignition head, the electronic ignition head is connected to one end of a starting harness 6, and the other end of the starting harness 6 is connected to a power source 8, a discharge port 5 is provided on the surface of the shell 1, the line of the starting harness 6 located in the temperature sensing area is disconnected, and a fusible metal 9 in contact with the electric wire 2 is provided above.

[0027] Preferably, the housing 1 comprises an upper housing 1.1 and a lower housing 1.2, and one side of the upper housing 1.1 is hinged to one side of the lower housing 1.2. This split hinge structure can simplify the installation or removal process of the housing 1 on the surface of the wire 2; more preferably, one side of the upper housing 1.1 is hinged to one side of the lower housing 1.2 via a spring hinge.

[0028] Preferably, a groove 1.3 matching the wire 2 is provided at the contact position between the upper shell 1.1 and the lower shell 1.1. The position of the housing 1 on the surface of the wire 2 can be limited by the groove 1.3.

[0029] Preferably, if Figure 2 As shown, a rubber layer 1.4 is fixedly disposed at the position of the groove 1.3. The rubber layer 1.4 can increase the friction between the wire 2 and the groove 1.3, so that the housing 1 will not slide along the direction where the wire 2 is located.

[0030] Preferably, a positioning groove 4.1 matching with the electric wire 2 is provided at the top of the drug column groove 4. The positioning groove 4.1 can make the electric wire 2 contact well with the drug column groove 4, ensuring that the electric wire 2 is located above the drug column groove 4.

[0031] Preferably, the fire extinguishing agent charge 3 is a charge structure formed by pressing aerosol generating agent powder. When the aerosol generating agent burns, it releases a large amount of aerosol fire extinguishing substances and also generates heat. The high temperature brought by the heat can burn the wire 2, and the released aerosol fire extinguishing substances can be sprayed out from the spray port 5 to extinguish the fire in the outer area of ​​the shell 1.

[0032] Preferably, if Figure 4As shown, the gap between the shell 1 and the charge column groove 4 is also filled with a coolant 7. The coolant 7 can be a physical coolant and / or a chemical coolant, wherein the physical coolant can be one or more combinations of iron cuttings, ceramic balls, and goose warm stones, and the chemical coolant can be one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene. The coolant 7 can prevent the heat generated by the wire 2 and the heat generated by the combustion of the fire extinguishing agent charge column 3 from being released to the outside of the shell 1.

[0033] Preferably, if Figure 5 As shown, a charge column groove 4 is provided in the upper shell 1.1, and a base 10 is provided in the lower shell 1.2. A stepped groove 11 is provided inside the base 10. A fusible metal 9 is limited to the top of the stepped groove 11, and a line-disconnected starting harness 6 is provided at the bottom of the stepped groove 11. In this embodiment, when the electric wire 2 generates high temperature due to excessive current, the fusible metal 9 melts and flows from the top of the stepped groove 11 to the bottom, thereby connecting the line-disconnected area of ​​the starting harness 6, and the power supply 8 smoothly supplies power to the electronic ignition head, so that the electronic ignition head ignites, and then the fire extinguishing agent charge column 3 is ignited. In this embodiment, as Figure 6 As shown, the fusible metal 9 actually acts as a temperature-sensitive switch.

[0034] Preferably, a cavity for installing the power supply 8 is provided between the bottom of the base 10 and the bottom of the lower shell 1.2.

[0035] Preferably, the fusible metal 9 is provided with a threading hole 12 for threading the electric wire 2. Figure 7 As shown, by this penetration method, the fusible metal 9 and the wire 2 can be in close contact, ensuring the reliability of heat conduction, while also playing a certain limiting role on the wire 2.

[0036] Preferably, the fusible metal 9 is a bismuth-tin low melting point alloy. The bismuth-tin low melting point alloy has a melting point of only 70-160° C., is easily melted by heat, and is conductive.

[0037] The working principle of this embodiment is as follows: when the wire 2 generates high temperature due to excessive current, the fusible metal 9 melts and flows from the top of the stepped groove 11 to the bottom, thereby connecting the line disconnection area of ​​the starting harness 6, and the power supply 8 smoothly supplies power to the electronic ignition head, so that the electronic ignition head ignites, and then the fire extinguishing agent column 3 (taking the aerosol generating agent column as an example) is ignited, releasing a large amount of heat and aerosol fire extinguishing substances. The high temperature brought by the heat can burn the wire 2 and quickly disconnect the wire; and the released aerosol fire extinguishing substances can be sprayed out from the spray port 5 to extinguish the fire in the outer area of ​​the shell 1.

[0038] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A power-off device based on fusible metal temperature sensing, comprising a housing (1) arranged on an electric wire (2), characterized in that: The shell (1) is provided with a charge column groove (4) for fixing the fire extinguishing agent charge column (3), the top of the charge column groove (4) is open and the electric wire (2) is located above the charge column groove (4), the fire extinguishing agent charge column (3) is in contact with the electronic ignition head, the electronic ignition head is connected to one end of the starting wire harness (6), the other end of the starting wire harness (6) is connected to the power supply (8), the surface of the shell (1) is provided with a discharge port (5), the line of the starting wire harness (6) located in the temperature sensing area is disconnected, and a fusible metal (9) in contact with the electric wire (2) is provided above.

2. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: The housing (1) comprises an upper housing (1.1) and a lower housing (1.2), and one side of the upper housing (1.1) is hinged to one side of the lower housing (1.2).

3. A power-off device based on fusible metal temperature sensing according to claim 2, characterized in that: A groove (1.3) matching the electric wire (2) is provided at the contact position between the upper shell (1.1) and the lower shell (1.2).

4. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: A rubber layer (1.4) is also fixedly provided at the position of the groove (1.3).

5. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: A positioning groove (4.1) matching the electric wire (2) is provided at the top of the drug column groove (4).

6. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: The fire extinguishing agent column (3) is a column structure formed by pressing aerosol generating agent powder.

7. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: The gap between the shell (1) and the charge groove (4) is also filled with a coolant (7).

8. A power-off device based on fusible metal temperature sensing according to claim 2, characterized in that: A charge column groove (4) is provided in the upper shell (1.1), a base (10) is provided in the lower shell (1.2), a stepped groove (11) is provided inside the base (10), the fusible metal (9) is limited at the top of the stepped groove (11), and a line-disconnecting starting harness (6) is provided at the bottom of the stepped groove (11).

9. A power-off device based on fusible metal temperature sensing according to claim 8, characterized in that: A cavity for installing a power source (8) is also provided between the bottom of the base (10) and the bottom of the lower shell (1.2).

10. A power-off device based on fusible metal temperature sensing according to claim 1, characterized in that: A wire threading hole (12) for threading an electric wire (2) is provided inside the fusible metal (9).

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