Isolating switch

Abstract

The utility model relates to the technical field of switches, in particular to an isolating switch. According to the technical scheme, the switch comprises a switch shell and four sleeves, and the four sleeves are installed on four line plugging ports in the switch shell respectively; and the four flame-retardant mechanisms are respectively arranged at one end, which is positioned in the switch shell, of the sleeve. According to the utility model, in the process that the hot melting film is firstly melted by high temperature generated in the switch shell, the shape of the shape memory alloy is restored by the high temperature, and then the isolating film is punctured, so that the compressed inert gas in the isolating film rapidly breaks through the isolating film, and flame-retardant powder on the isolating film is sprayed out from the strip-shaped through groove; the circuit in the switch shell is quickly covered by the cover, so that the effect of extinguishing flames is achieved, fire hazards caused by combustion of the switch shell are avoided, and finally the effects of quickly extinguishing the flames and reducing the risk of the fire hazards are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a disconnector. Background Art

[0002] A disconnector is a common switch used to protect circuits. Generally, by toggling an external switch, the internal circuit can be controlled to be turned on and off. When a disconnector is used at some outdoor construction sites, it is generally installed in a simple electrical box. When the box body is damaged or the box door fails to close tightly, the internal disconnector is very likely to come into contact with external rainwater or other water sources, which may lead to a short circuit, posing a great danger. Compared with an air switch, the disconnector lacks an arc extinguishing device, overload protection, and overheat protection. Therefore, when a short circuit occurs in the circuit, the disconnector cannot quickly disconnect the circuit, which is very likely to cause the circuit to overheat or even generate sparks, thus causing a fire.

[0003] The structure of the traditional disconnector is too simple. When high temperature or sparks are caused by a short circuit problem inside the switch, the internal high temperature and sparks cannot be quickly handled, which is very likely to cause a fire problem. Summary of the Invention

[0004] The purpose of the utility model is to address the problem in the background art that the structure of the traditional disconnector is too simple, and when high temperature or sparks are caused by a short circuit problem inside the switch, the internal high temperature and sparks cannot be quickly handled, which is very likely to cause a fire, and to propose a disconnector.

[0005] The technical solution of the utility model: A disconnector includes a switch housing, and also includes four sleeves, and the four sleeves are respectively installed on four line sockets on the switch housing; two flame retardant mechanisms, and the four flame retardant mechanisms are respectively installed on one end of the sleeves located inside the switch housing.

[0006] Optionally, the flame retardant mechanism includes a baffle, the baffle is fixedly connected to one end of two adjacent sleeves located inside the switch housing, a flame retardant box is fixedly connected to the center of the end of the baffle opposite to the sleeve, an isolation film is arranged inside the flame retardant box, compressed gas is filled inside the isolation film, and the compressed gas is an inert gas. Flame retardant powder is filled between the top of the isolation film and the inner wall of the flame retardant box. A strip-shaped through groove is opened on the side of the flame retardant box opposite to the baffle, and a heat-melting film is fixedly connected inside the strip-shaped through groove. A heat conduction block is fixedly connected to the top of the inner wall of the flame retardant box, and a plurality of shape memory alloys in a bent state are fixedly connected to the bottom of the heat conduction block.

[0007] Optionally, a plurality of heat conduction shafts are fixedly connected to the top of the heat conduction block, and the heat conduction shafts penetrate through the flame retardant box and extend outside the flame retardant box.

[0008] Optionally, two limiting rings are fixedly connected to the sleeve in a sleeved manner, and the two limiting rings are respectively in fitting connection with the inner wall and the outer wall of the switch housing.

[0009] Optionally, a water stop strip is arranged between the two limiting rings. The water stop strip is sleeved on the sleeve and is in fitting connection with the circuit insertion interface on the switch housing.

[0010] Optionally, a heat shrinkable film is bonded inside the sleeve, and both ends of the heat shrinkable film respectively extend outside both ends of the sleeve.

[0011] Optionally, a mounting seat is installed on the outer side of the switch housing. A protective shell is hinged to the top of the mounting seat, and a transparent observation area is arranged in the middle of the protective shell.

[0012] Optionally, two through holes corresponding to the circuit insertion interfaces on the switch housing are opened on both the upper and lower sides of the mounting seat, and a plurality of rubber sheets adapted to the through holes are arranged in the through holes.

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

[0014] During the process that the high temperature generated inside the switch housing first melts the heat fusion film, the high temperature will cause the shape memory alloy to restore its shape, and then pierce the isolation film, so that the compressed inert gas in the isolation film quickly breaks through the isolation film, and sprays the flame retardant powder on the isolation film out of the strip-shaped through groove, so that it quickly covers the circuit inside the switch housing, achieving the effect of extinguishing the flame, avoiding the switch housing from burning and causing a fire, and finally achieving the effect of quickly extinguishing the flame and reducing the fire risk. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 The structural schematic diagram of the mounting seat and the protective shell of the utility model is given;

[0017] Figure 3 The structural schematic diagram of the switch housing and the mounting seat of the utility model is given;

[0018] Figure 4 The structural schematic diagram of the flame retardant mechanism and the collar of the utility model is given;

[0019] Figure 5 The structural sectional view of the flame retardant box of the utility model is given.

[0020] Reference numerals: 1, switch housing; 2, mounting base; 3, protective housing; 4, flame retardant mechanism; 5, sleeve; 6, limiting ring; 7, water stop strip; 8, heat shrinkable film; 9, baffle; 10, flame retardant box; 11, heat conducting shaft; 12, heat conducting block; 13, shape memory alloy; 14, isolation film; 15, hot melt film; 16, rubber sheet. Detailed implementation manners

[0021] The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Embodiment

[0022] As Figures 1-5 shown, the present utility model provides a disconnect switch, which includes a switch housing 1, and further includes four sleeves 5, and the four sleeves 5 are respectively installed on four line sockets of the switch housing 1; two flame retardant mechanisms 4, and the four flame retardant mechanisms 4 are respectively installed on one ends of the sleeves 5 located inside the switch housing 1.

[0023] In this embodiment, the flame retardant mechanism 4 in the disconnect switch includes a baffle 9, the baffle 9 is fixedly connected to one ends of two adjacent sleeves 5 located inside the switch housing 1, and a flame retardant box 10 is fixedly connected to the center of one end of the baffle 9 opposite to the sleeve 5. An isolation film 14 is arranged in the flame retardant box 10, and compressed gas is filled in the isolation film 14, and the compressed gas is an inert gas. Flame retardant powder is filled between the top of the isolation film 14 and the inner wall of the flame retardant box 10. A strip-shaped through groove is formed in one side of the flame retardant box 10 opposite to the baffle 9, and a hot melt film 15 is fixedly connected in the strip-shaped through groove. A heat conducting block 12 is fixedly connected to the top of the inner wall of the flame retardant box 10, and a plurality of shape memory alloys 13 in a bent state are fixedly connected to the bottom of the heat conducting block 12. Through the above settings, when a short circuit occurs in the switch housing 1, the high temperature generated inside will first melt the hot melt film 15, and at the same time, the high temperature will cause the shape memory alloy 13 to restore its shape, thereby piercing the isolation film 14, so that the compressed inert gas in the isolation film 14 quickly breaks through the isolation film 14, and sprays the flame retardant powder on the isolation film 14 out of the strip-shaped through groove, so that it quickly covers the lines inside the switch housing 1, achieving the effect of extinguishing the flame and preventing the switch housing 1 from burning and causing a fire.

[0024] In addition, a plurality of heat conducting shafts 11 are fixedly connected to the top of the heat conducting block 12, the heat conducting shafts 11 penetrate through the flame retardant box 10 and extend outside the flame retardant box 10. By contacting one end of the plurality of heat conducting shafts 11 with the flame retardant box 10 and the other end extending to the outside, the heat can be guided to accelerate the shape restoration of the heat conducting block 12 on the flame retardant box 10, thereby piercing the isolation film 14, facilitating the spraying of the compressed gas in the isolation film 14, driving the flame retardant powder, and physically extinguishing the flame in the switch housing 1, reducing the fire risk.

[0025] Among them, two limiting rings 6 are fixedly connected to the sleeve 5 by sleeving. The two limiting rings 6 are respectively in fitting connection with the inner wall and the outer wall of the switch housing 1. By arranging the two limiting rings 6 on both sides of the circuit socket on the switch housing 1, the stability of the sleeve 5 in the socket can be improved, and at the same time, the risk of foreign objects entering the switch housing 1 from the outside and causing a short circuit in the circuit can be reduced.

[0026] Furthermore, a water-stop strip 7 is arranged between the two limiting rings 6. The water-stop strip 7 is sleeved on the sleeve 5 and is in fitting connection with the circuit socket on the switch housing 1. By arranging the water-stop strip 7, when the circuit socket of the switch housing 1 encounters water, the water-stop strip 7 can absorb the water and expand. On the one hand, the sealing performance between the socket and the sleeve 5 is enhanced, and on the other hand, the continuous infiltration of water is avoided, greatly reducing the risk of short circuit caused by water seepage in the switch housing 1.

[0027] Even further, a heat-shrinkable film 8 is bonded inside the sleeve 5. Both ends of the heat-shrinkable film 8 extend outside both ends of the sleeve 5. By arranging the heat-shrinkable film 8 inside the sleeve 5, according to the properties of the heat-shrinkable film 8, when encountering high temperature, it can quickly shrink, tighten and protect the circuit, and at the same time, minimize the risk of outside air entering the switch housing 1 through the gaps between the circuits and providing oxygen required for the spread of fire.

[0028] In addition, a mounting seat 2 is installed on the outside of the switch housing 1. A protective shell 3 is hinged to the top of the mounting seat 2. A transparent observation area is arranged in the middle of the protective shell 3. Through the above settings, on the one hand, the protection effect on the switch housing 1 can be improved, greatly reducing the interference from the outside to the switch housing 1, and at the same time, it does not affect the observation of the state of the switch housing 1 by personnel.

[0029] Among them, two through holes corresponding to the circuit sockets on the switch housing 1 are opened on both the upper and lower sides of the mounting seat 2, and a plurality of rubber sheets 16 adapted to the through holes are arranged in the through holes. Through this setting, it is convenient for the circuit to pass through the mounting seat 2, and at the same time, foreign objects are prevented from entering the mounting seat 2 from the connection between the mounting seat 2 and the circuit, improving the protection effect on the switch housing 1.

[0030] The flame-retardant powder in this article is composed of potassium nitrate powder and quartz crystal particles. The potassium nitrate powder can react with water and quickly absorb the surrounding heat, thereby reducing the surrounding temperature, while the quartz particles can quickly extinguish the open flame and block the continuous contact between the flame and the air.

[0031] Working principle: When a short circuit occurs in the switch housing 1, the high temperature generated inside will first melt the heat-melting film 15. At the same time, the high temperature will cause the shape memory alloy 13 to restore its shape, and then pierce the isolation film 14, so that the compressed inert gas in the isolation film 14 quickly breaks through the isolation film 14, and sprays the flame-retardant powder on the isolation film 14 out of the strip-shaped through groove, so that it quickly covers the circuit inside the switch housing 1, achieving the effect of extinguishing the flame and preventing the switch housing 1 from burning and causing a fire;

[0032] Among them, when the water stop strip 7 encounters water at the circuit insertion interface of the switch housing 1, it absorbs the water body and expands. On the one hand, it enhances the sealing performance between the insertion interface and the sleeve 5. On the other hand, it prevents the water body from continuing to penetrate, greatly reducing the risk of short circuit caused by water seepage in the switch housing 1. When the heat-shrinkable film 8 encounters high temperature, it can quickly shrink, tighten and protect the circuit, and at the same time minimize the risk of external air entering the switch housing 1 through the gaps between the circuits to provide oxygen required for expanding the fire.

[0033] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An isolating switch, comprising a switch housing (1), characterized in that, Further comprising: Four sleeves (5), and the four sleeves (5) are respectively installed on four line insertion interfaces of the switch housing (1); Two flame-retardant mechanisms (4), and the four flame-retardant mechanisms (4) are respectively installed on one ends of the sleeves (5) located inside the switch housing (1). The flame-retardant mechanism (4) includes a baffle (9), and the baffle (9) is fixedly connected to one ends of two adjacent sleeves (5) located inside the switch housing (1). At the center of one end of the baffle (9) facing away from the sleeve (5), a flame-retardant box (10) is fixedly connected. An isolation film (14) is arranged inside the flame-retardant box (10), and a compressed gas is filled inside the isolation film (14), and the compressed gas is an inert gas. A flame-retardant powder is filled between the top of the isolation film (14) and the inner wall of the flame-retardant box (10). A strip-shaped through groove is formed on one side of the flame-retardant box (10) facing away from the baffle (9), and a heat-melting film (15) is fixedly connected inside the strip-shaped through groove. A heat-conducting block (12) is fixedly connected to the top of the inner wall of the flame-retardant box (10), and a plurality of shape memory alloys (13) in a bent state are fixedly connected to the bottom of the heat-conducting block (12).

2. The disconnector according to claim 1, characterized in that, A plurality of heat-conducting shafts (11) are fixedly connected to the top of the heat-conducting block (12), and the heat-conducting shafts (11) penetrate through the flame-retardant box (10) and extend outside the flame-retardant box (10).

3. An isolating switch according to claim 1, characterized in that, Two limiting rings (6) are fixedly sleeved on the sleeve (5), and the two limiting rings (6) are respectively in close contact with the inner wall and the outer wall of the switch housing (1).

4. The disconnector according to claim 3, characterized in that, A water-stop strip (7) is arranged between the two limiting rings (6), and the water-stop strip (7) is sleeved on the sleeve (5) and is in close contact with the line insertion interface on the switch housing (1).

5. A disconnector according to claim 1, characterized in that, A heat-shrinkable film (8) is adhered inside the sleeve (5), and both ends of the heat-shrinkable film (8) respectively extend outside both ends of the sleeve (5).

6. A disconnector according to claim 1, characterized in that, An installation seat (2) is installed on the outer side of the switch housing (1), a protective shell (3) is hinged to the top of the installation seat (2), and a transparent observation area is arranged in the middle of the protective shell (3).

7. The disconnector according to claim 6, characterized in that, Two through holes corresponding to the line insertion interfaces on the switch housing (1) are respectively formed on the upper and lower sides of the installation seat (2), and a plurality of rubber sheets (16) adapted to the through holes are arranged inside the through holes.

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