Self-extinguishing electric control box

Abstract

The utility model provides a kind of self-extinguishing electric cabinet, including the box body with electronic component inside installation, the box body both sides are opened with air vent, box body one end is rotatably connected with driving gear, driving gear both ends are respectively engaged with driving rack one and driving rack two, driving rack one and driving rack two one side are slidably connected in box body top inner wall, driving rack one and driving rack two one end are respectively rotatably connected with closed assembly, box body one end is fixedly connected with heat conduction rod, heat conduction rod lower end is fixedly connected with bimetallic strip, bimetallic strip other end is fixedly connected with positioning buckle two;With when the high temperature of box body inside or outside, heat conduction rod passes heat to bimetallic strip, makes it bend downward, let positioning buckle separate from positioning groove, trigger driving gear rotation.This drives driving rack to move outward, sealing baffle is pressed down by connecting rod and closes air vent, cut off oxygen supply, effectively prevent the advantage that arc or high temperature causes rekindling.

Description

Technical Field

[0001] This utility model relates to the field of electrical control box technology, and in particular to a self-extinguishing electrical control box. Background Technology

[0002] An electrical control box, also known as a power distribution control box or electrical control cabinet, is a metal or non-metal enclosure device that integrates various electrical components such as circuit breakers, contactors, relays, frequency converters, and PLCs. It is used for centralized power distribution, protection, monitoring, and control of industrial equipment or building electrical systems. Widely used in production lines, machinery, building automation, and various infrastructures, electrical control boxes contain a large number of wires, terminals, switching elements, and semiconductor devices. Aging and damaged wiring, loose connections (leading to increased contact resistance and heat generation), overload operation, short circuits in components, or quality defects (such as relay arcing) can all generate high temperatures, electrical sparks, or even continuous arcs. These abnormalities can easily ignite accumulated dust, lint, or the plastic insulation material of the components themselves. Once ignited internally, the heat is difficult to dissipate within the confined space, and limited oxygen leads to incomplete combustion, producing large amounts of high-temperature, toxic, and dense smoke. Although the metal enclosure itself is non-combustible, the accumulated heat inside can quickly bake and ignite nearby cable sheaths, insulation materials, or other flammable materials in the workshop / building (such as lubricating oil, wood products, cardboard boxes, etc.), causing internal smoldering or external flame spray. Therefore, a self-extinguishing electrical control box is needed. Utility Model Content

[0003] In view of this, the present invention aims to provide a self-extinguishing fire control box to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial alternative.

[0004] The technical solution of this utility model embodiment is implemented as follows: It includes a box housing with electronic components installed inside. Ventilation openings are opened on both sides of the box housing. A drive gear is rotatably connected to one end of the box housing. Drive gear 1 and drive gear 2 are respectively meshed at both ends of the drive gear. Drive gear 1 and drive gear 2 are slidably connected to the inner wall of the top of the box housing on one side. A sealing component is rotatably connected to one end of drive gear 1 and drive gear 2 respectively. A heat-conducting rod is fixedly connected to one end of the box housing. A bimetallic strip is fixedly connected to the lower end of the heat-conducting rod. A positioning buckle 2 is fixedly connected to the other end of the bimetallic strip. A positioning groove 2 is opened below drive gear 2. The positioning buckle 2 is inserted into the inner side of the positioning groove 2.

[0005] In some embodiments, the sealing assembly includes a limiting groove, a sealing baffle, a pressing rod, and a connecting rod. The two connecting rods are respectively rotatably connected to either a first driving rack or a second driving rack. One end of the pressing rod is rotatably connected to the other end of the connecting rod. The sealing baffle is fixedly connected below the pressing rod. The limiting groove is fixedly connected to one side of the housing. The sealing baffle is slidably connected between the limiting groove and the housing.

[0006] In some embodiments, a rotating plate is fixedly connected above the drive gear, and a spring is fixedly connected between the rotating plate and the top of the housing.

[0007] In some embodiments, a fire extinguisher bottle is fixedly connected to the top of the box, a fire extinguishing nozzle is fixedly connected to one end of the fire extinguisher bottle, the other end of the fire extinguishing nozzle is fixedly connected to the inside of the box, a squeeze valve is fixedly connected to one end of the fire extinguishing nozzle, and a squeeze rod is fixedly connected to one end of each of the drive rack one and drive rack two.

[0008] In some embodiments, an upper cover is fixedly connected to the top of the box, and an inner cover is fixedly connected to the inner wall of the top of the box.

[0009] In some embodiments, filter plates are fixedly connected to both sides of the housing.

[0010] In some embodiments, one end of the drive rack has a positioning groove, one end of the housing is slidably connected to a lifting rod, one end of the lifting rod is fixedly connected to a positioning buckle, and the top of the positioning buckle is slidably connected to the bottom of the drive rack.

[0011] In some embodiments, a spring is fixedly connected to one end of the lifting rod and the inner wall of the top of the housing.

[0012] The present invention has the following advantages due to the adoption of the above technical solution:

[0013] 1. A self-extinguishing electrical control box, characterized in that when the internal or external temperature of the box is high, the heat-conducting rod transfers heat to the bimetallic strip, causing it to bend downwards, disengaging the positioning buckle from the positioning groove, and triggering the drive gear to rotate. This drives the drive rack to move outwards, pressing down the sealing baffle through the connecting rod to close the ventilation opening, cutting off the oxygen supply and effectively preventing reignition caused by electric arc or high temperature.

[0014] 2. A self-extinguishing fire control box, wherein during the movement of the drive rack, the squeezing rod presses the squeezing valve button, releasing carbon dioxide from the fire extinguisher cylinder to fill the box interior. This achieves rapid automatic fire extinguishing and reduces the risk of fire spreading.

[0015] 3. A self-extinguishing electrical control box, wherein when the drive rack moves horizontally, a spring drives the lifting rod to move upward, so that the positioning buckle is inserted into the positioning groove to fix the position, preventing shaking and ensuring that the extinguishing agent is continuously sprayed and the sealing state is not loose.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is the main view of the present invention.

[0019] Figure 2 This is a diagram of the internal structure of the present invention;

[0020] Figure 3 For the present utility model Figure 2 Structural diagram at point A;

[0021] Figure 4 This is a partial cross-sectional view of the drive rack of this utility model;

[0022] Figure 5 This is a cross-sectional view of the external protective shell of this utility model;

[0023] Figure 6 This is a diagram showing the mounting structure of the second spring of this utility model;

[0024] Figure 7 This is an installation structure diagram of positioning buckle one and positioning buckle two of this utility model.

[0025] Figure label:

[0026] 1. Housing; 2. Electronic components; 3. Filter plate; 4. Top cover; 5. Inner top cover; 6. Ventilation opening; 7. Limiting groove; 8. Sealing baffle; 9. Downward pressure rod; 10. Connecting rod; 11. Drive gear; 12. Drive rack one; 13. Drive rack two; 14. Heat-conducting rod; 15. Positioning groove one; 16. Bimetallic strip; 17. Positioning buckle one; 18. Lifting rod; 19. Extrusion valve; 20. Fire extinguishing nozzle; 21. Extrusion rod; 22. Positioning buckle two; 23. Positioning groove two; 24. Spring one; 25. Fire extinguisher bottle; 26. Rotating plate; 27. Spring two. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] Example 1:

[0030] like Figure 1-7 As shown, a self-extinguishing fire control box includes a box body 1 with electronic components 2 installed inside. Ventilation openings 6 are located on both sides of the box body 1, allowing airflow in and out. A drive gear 11 is rotatably connected to one end of the box body 1. Drive rack 12 and drive rack 2 13 are respectively meshed at both ends of the drive gear 11. Drive rack 12 and drive rack 2 13 are slidably connected to the inner top wall of the box body 1 on one side. A sealing assembly is rotatably connected to one end of each drive rack 12 and drive rack 2 13. A heat-conducting rod 14 is fixedly connected to one end of the box body 1, and a bimetallic strip is fixedly connected to the lower end of the heat-conducting rod 14. 16; The bimetallic strip 16 is a sensing element that utilizes the thermal expansion characteristics of metals. It is made of two metal sheets with different coefficients of thermal expansion tightly bonded together. When the temperature rises, the metal sheet with the larger coefficient of thermal expansion elongates more, while the metal sheet with the smaller coefficient of thermal expansion elongates less. This uneven expansion causes the entire metal sheet to bend towards the side with the smaller coefficient of thermal expansion. After cooling, the bimetallic strip 16 will return to flatness. The other end of the bimetallic strip 16 is fixedly connected to a positioning buckle 22. A positioning groove 23 is opened below the drive rack 23, and the positioning buckle 22 is inserted into the inside of the positioning groove 23.

[0031] The enclosure assembly includes a limiting groove 7, a sealing baffle 8, a pressing rod 9, and a connecting rod 10. The two connecting rods 10 are respectively rotatably connected to a first driving rack 12 or a second driving rack 13. One end of the pressing rod 9 is rotatably connected to the other end of the connecting rod 10. The sealing baffle 8 is fixedly connected below the pressing rod 9. The limiting groove 7 is fixedly connected to one side of the housing 1. The sealing baffle 8 is slidably connected between the limiting groove 7 and the housing 1.

[0032] When in use, the heat-conducting rod 14 will transfer the heat inside and outside the box 1 to the bimetallic strip 16. When the box 1 is on fire and generates high temperature, one end of the bimetallic strip 16 will rotate downward, thereby causing the positioning buckle 22 to disengage from the positioning groove 23. After the drive rack 23 is no longer fixed, the drive gear 11 will rotate, causing the drive rack 12 and drive rack 23 to move outward. At this time, the connecting rod 10 will press the pressing rod 9 to press the sealing baffle 8 downward, thereby inserting it into the bottom of the limiting groove 7 and sealing the ventilation openings 6 on both sides. At this time, air cannot enter the box 1. Because electrical fires are special in that the ignition source is often a continuous electric arc, and even if the power is cut off, there may still be residual high temperature. Therefore, the oxygen supply must be cut off at the same time. Without fresh air entering, reignition can be quickly prevented.

[0033] In this embodiment, a rotating plate 26 is fixedly connected above the drive gear 11, and a spring 27 is fixedly connected between the rotating plate 26 and the top of the housing 1. The spring 27 can cause the drive gear 11 to rotate quickly after the positioning buckle 22 is disengaged from the positioning groove 23, thereby driving the sealing baffle 8 to move downward.

[0034] In this embodiment, a fire extinguisher bottle 25 is fixedly connected to the top of the box 1. The fire extinguisher bottle 25 is preferably a carbon dioxide fire extinguisher. One end of the fire extinguisher bottle 25 is fixedly connected to a fire extinguishing nozzle 20, and the other end of the fire extinguishing nozzle 20 is fixedly connected to the inside of the box 1. One end of the fire extinguishing nozzle 20 is fixedly connected to a squeeze valve 19, and one end of the drive rack 12 and the drive rack 23 are respectively fixedly connected to squeeze rods 21.

[0035] When the drive rack 12 and drive rack 23 move outward under the drive of the drive gear 11, they can drive the squeeze rod 21 to move and press the button end of the squeeze valve 19. When the button is pressed down, the squeeze valve 19 will release carbon dioxide from the fire extinguisher bottle 25 to fill the inside of the box 1 for fire extinguishing.

[0036] In this embodiment, the top of the box 1 is fixedly connected to the top cover 4, and the inner wall of the top of the box 1 is fixedly connected to the inner cover 5. The top cover 4 can protect the fire extinguisher bottle 25 from the outside, and the inner cover 5 is made of insulating material to protect the drive gear 11, drive gear 12 and drive gear 13 and prevent them from contacting the electronic components 2.

[0037] In this embodiment, filter plates 3 are fixedly connected to both sides of the housing 1. The filter plates 3 can reduce the entry of dust and reduce the probability of fire.

[0038] In this embodiment: When in use, the heat-conducting rod 14 will transfer the heat inside and outside the box 1 to the bimetallic strip 16. When the inside or outside of the box 1 catches fire and generates high temperature, one end of the bimetallic strip 16 will rotate downward, thereby causing the positioning buckle 22 to disengage from the positioning groove 23. After the drive rack 23 loses its fixation, the drive gear 11 will rotate, causing the drive rack 12 and drive rack 23 to move outward. At this time, the connecting rod 10 will press the pressing rod 9 to press the sealing baffle 8 downward, thereby inserting it into the bottom of the limiting groove 7 and sealing the ventilation openings 6 on both sides. At this time, air cannot enter the box 1. Because electrical fires are special in that the ignition source is often a continuous electric arc, and even if the power is cut off, there may still be residual high temperature. Therefore, the oxygen supply must be cut off at the same time. Without fresh air entering, reignition can be quickly prevented.

[0039] Spring 27 can cause the drive gear 11 to rotate rapidly after the positioning buckle 22 disengages from the positioning groove 23, driving the sealing baffle 8 to move downward. When the drive rack 12 and drive rack 23 move outward under the drive of the drive gear 11, they can drive the squeezing rod 21 to move and press the button end of the squeezing valve 19. The squeezing valve 19, with the button pressed down, will release carbon dioxide from the fire extinguisher bottle 25 to fill the inside of the box 1 for fire extinguishing.

[0040] The top cover 4 can protect the fire extinguisher bottle 25 from the outside, and the inner top cover 5 is made of insulating material to protect the drive rack 11, drive rack one 12 and drive rack two 13, preventing contact with electronic components 2. The filter plate 3 can reduce dust entry and reduce the probability of fire.

[0041] Example 2:

[0042] A self-extinguishing fire control box, this embodiment is based on embodiment 1 with the following improvements, such as... Figure 1-7 As shown,

[0043] In this embodiment, one end of the drive rack 13 has a positioning groove 15, one end of the housing 1 is slidably connected to a lifting rod 18, one end of the lifting rod 18 is fixedly connected to a positioning buckle 17, and the top of the positioning buckle 17 is slidably connected to the bottom of the drive rack 13; one end of the lifting rod 18 and the top inner wall of the housing 1 are fixedly connected to a spring 24.

[0044] To prevent the squeezing rod 21 at one end of the drive rack 12 and drive rack 23 from shaking when pressing the squeezing valve 19, which would cause the carbon dioxide to be interrupted and unable to extinguish the fire;

[0045] During the translation of drive rack 12 and drive rack 23, spring 24 will drive lifting rod 18 to move upward. This will cause positioning buckle 17 to insert into positioning groove 15, which can prevent drive rack 12 and drive rack 23 from moving, prevent carbon dioxide from being interrupted, and prevent sealing baffle 8 from moving upward.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A self-extinguishing fire control box, comprising a box (1) with electronic components (2) installed inside, characterized in that: Ventilation openings (6) are provided on both sides of the box (1). A drive gear (11) is rotatably connected to one end of the box (1). Drive gear (11) is meshed with drive rack one (12) and drive rack two (13) at both ends. Drive rack one (12) and drive rack two (13) are slidably connected to the inner wall of the top of the box (1) on one side. A sealing component is rotatably connected to one end of drive rack one (12) and drive rack two (13). A heat-conducting rod (14) is fixedly connected to one end of the box (1). A bimetallic strip (16) is fixedly connected to the lower end of the heat-conducting rod (14). The other end is fixedly connected to a positioning buckle two (22), and a positioning groove two (23) is opened below the drive gear two (13). The positioning buckle two (22) is inserted into the inner side of the positioning groove two (23); a fire extinguisher bottle (25) is fixedly connected above the box (1). A fire extinguisher nozzle (20) is fixedly connected to one end of the fire extinguisher bottle (25), and the other end of the fire extinguisher nozzle (20) is fixedly connected to the inside of the box (1). A squeeze valve (19) is fixedly connected to one end of the fire extinguisher nozzle (20), and a squeeze rod (21) is fixedly connected to one end of the drive gear one (12) and the drive gear two (13).

2. The self-extinguishing fire control box according to claim 1, characterized in that: The sealing assembly includes a limiting groove (7), a sealing baffle (8), a pressing rod (9), and a connecting rod (10). The two connecting rods (10) are rotatably connected to either the first driving rack (12) or the second driving rack (13). One end of the pressing rod (9) is rotatably connected to the other end of the connecting rod (10). The sealing baffle (8) is fixedly connected below the pressing rod (9). The limiting groove (7) is fixedly connected to one side of the housing (1). The sealing baffle (8) is slidably connected between the limiting groove (7) and the housing (1).

3. The self-extinguishing fire control box according to claim 1, characterized in that: A rotating plate (26) is fixedly connected above the drive gear (11), and a spring (27) is fixedly connected to the top of the rotating plate (26) and the housing (1).

4. A self-extinguishing fire control box according to claim 2, characterized in that: The top of the box (1) is fixedly connected to the top cover (4), and the inner wall of the top of the box (1) is fixedly connected to the inner cover (5).

5. A self-extinguishing fire control box according to claim 1, characterized in that: Filter plates (3) are fixedly connected to both sides of the box (1).

6. A self-extinguishing fire control box according to claim 4, characterized in that: The drive rack 2 (13) has a positioning groove 1 (15) at one end, and a lifting rod (18) is slidably connected to one end of the housing (1). A positioning buckle 1 (17) is fixedly connected to one end of the lifting rod (18), and the top of the positioning buckle 1 (17) is slidably connected to the bottom of the drive rack 2 (13).

7. A self-extinguishing fire control box according to claim 6, characterized in that: One end of the lifting rod (18) is fixedly connected to the inner wall of the top of the box (1) by a spring (24).

Images