Electrical cabinet capable of preventing high-temperature fire

Abstract

The utility model discloses an electrical cabinet capable of preventing high-temperature fire, which relates to the field of electrical cabinet structures and comprises a cabinet body with heat dissipation holes, a carbon dioxide generating mechanism is arranged on the cabinet body, and the carbon dioxide generating mechanism is provided with air outlet holes communicated with the inside of the cabinet body; the carbon dioxide generating mechanism comprises a sliding cavity and a reaction cavity, the sliding cavity and the reaction cavity are communicated through a communicating hole, and the communicating hole is sealed by a sealing piece with opening pressure; an extrusion plate is connected in the sliding cavity, an acid solution is stored in the sliding cavity between the extrusion plate and the sealing piece, and calcium carbonate particles are stored in the reaction cavity; the air outlet communicates with the reaction cavity; a smoke detector electrically connected with the controller is arranged in the cabinet body, and the controller is electrically connected with the carbon dioxide generating mechanism or / and the alarm. According to the utility model, the oxygen content in the electrical cabinet can be rapidly reduced at the beginning of combustion, so that combustion is prevented, continuous proceeding and aggravation of combustion are avoided, the damage amount of electrical components in the electrical cabinet is reduced, and the purpose of reducing economic loss is achieved.

Description

Technical Field

[0001] The utility model relates to the field of electrical cabinet structures, in particular to an electrical cabinet capable of preventing high-temperature fires. Background Art

[0002] There are many types of electrical equipment, among which electrical cabinets are made of steel to protect the normal operation of components. Electrical cabinets are often used to place various types of electrical components, which are connected to each other to achieve corresponding control purposes.

[0003] When the components inside the electrical cabinet are working, a large amount of heat is generated. When the heat accumulates to a certain level, it will cause the electrical components inside the electrical cabinet to burn. In order to solve this problem, the current method is to improve the heat dissipation efficiency inside the electrical cabinet to avoid heat accumulation. However, if the electrical cabinet is used for a long time or in hot weather, there is still a risk of combustion.

[0004] If the electrical components inside the electrical cabinet are on fire, they need to be put out in time to avoid the burning from getting worse and reduce economic losses. Therefore, an electrical cabinet capable of preventing high temperature fire is provided. Summary of the invention

[0005] The purpose of the utility model is to provide an electrical cabinet that can prevent high-temperature fires in response to the above-mentioned problems, and can rapidly reduce the oxygen content inside the electrical cabinet at the beginning of combustion, thereby preventing combustion, avoiding continued and intensified combustion, and reducing the amount of damage to electrical components inside the electrical cabinet, thereby achieving the purpose of reducing economic losses.

[0006] The technical solution adopted by the utility model is as follows: an electrical cabinet capable of preventing high-temperature fires, comprising a cabinet body with heat dissipation holes, the heat dissipation holes connecting the inside and outside of the cabinet body, a carbon dioxide generating mechanism being arranged on the cabinet body, and the carbon dioxide generating mechanism having an air outlet connected to the inside of the cabinet body.

[0007] Furthermore, a smoke detector is provided in the cabinet, and the electrical signal of the smoke detector is connected to a controller, and the controller is electrically connected to a carbon dioxide generating mechanism and / or an alarm.

[0008] Furthermore, the carbon dioxide generating mechanism includes a sliding chamber and a reaction chamber, the sliding chamber is connected to the reaction chamber through a connecting hole, and the connecting hole is closed by a sealing member with an opening pressure; an extrusion plate acted upon by a driving mechanism is sealed and slidably connected in the sliding chamber, and an acidic solution is stored in the sliding chamber between the extrusion plate and the sealing member, and calcium carbonate particles are stored in the reaction chamber; the gas outlet is connected to the reaction chamber.

[0009] Furthermore, the air outlet is arranged on the air outlet pipe, the air inlet of the air outlet pipe is connected to the top of the reaction chamber, and the air outlet pipe is installed in the cabinet.

[0010] Furthermore, the air outlet pipe is installed on the top of the cabinet.

[0011] Furthermore, the driving mechanism is a second fan, which is mounted on the cabinet, and the wind direction of the second fan is toward the side of the extrusion plate away from the acid solution.

[0012] Furthermore, the driving mechanism is a linear telescopic mechanism, a fixed end of the linear telescopic mechanism is connected to the cabinet, and a movable end of the linear telescopic mechanism is connected to the extrusion plate.

[0013] Furthermore, the driving mechanism is electrically connected to a controller.

[0014] Furthermore, an elastic member is arranged between a side of the extrusion plate away from the acid solution and an inner wall of the sliding cavity.

[0015] Furthermore, the closing member is a diaphragm or a safety valve.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model can generate a large amount of carbon dioxide at the beginning of combustion inside the electrical cabinet to replace the original air in the cabinet, discharge oxygen and increase the heat dissipation speed, so as to rapidly reduce the oxygen content inside the electrical cabinet, thereby preventing combustion, avoiding continuous and intensified combustion, reducing the amount of damage to electrical components inside the electrical cabinet, and thus achieving the purpose of reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of an implementation of the cross-sectional structure disclosed in the utility model;

[0020] Figure 2 It is a schematic diagram of another embodiment of the cross-sectional structure disclosed in the utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of the utility model;

[0022] Markings in the figure: 1-cabinet; 11-heat dissipation hole; 2-sliding cavity; 21-extrusion plate; 22-acid solution; 3-reaction cavity; 31-calcium carbonate particles; 4-driving mechanism; 41-second fan; 42-linear telescopic mechanism; 5-elastic member; 6-exhaust pipe; 61-exhaust hole; 7-connecting hole; 71-closing member. DETAILED DESCRIPTION

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0024] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0025] Example 1

[0026] like Figure 1-Figure 3 As shown, an electrical cabinet capable of preventing high-temperature fires comprises a cabinet 1 having a heat dissipation hole 11, wherein the heat dissipation hole 11 connects the inside and outside of the cabinet 1, and the heat and gas inside the cabinet 1 can be dissipated outside the cabinet 1 through the heat dissipation hole 11, thereby avoiding heat accumulation inside the cabinet 1; a carbon dioxide generating mechanism is arranged on the cabinet 1, and the carbon dioxide generating mechanism can generate a large amount of carbon dioxide at the beginning of combustion inside the electrical cabinet, and the carbon dioxide generating mechanism has an air outlet 61 connected to the inside of the cabinet 1, and the carbon dioxide generated by the carbon dioxide generating mechanism enters the inside of the cabinet 1, and the original air inside the cabinet 1 is expelled to the outside of the cabinet 1, and the original air in the cabinet 1 is replaced, thereby realizing a rapid reduction in the oxygen content inside the electrical cabinet, thereby preventing combustion, avoiding continuous and aggravated combustion, and reducing the amount of damage to electrical components inside the electrical cabinet, thereby achieving the purpose of reducing economic losses.

[0027] It should be noted that after the carbon dioxide generated by the carbon dioxide generating mechanism enters the cabinet 1, on the one hand, it displaces the original air inside the cabinet 1, reducing the oxygen content while taking away a large amount of heat; on the other hand, it increases the air flow inside the cabinet 1, flows out from the heat dissipation holes 11, takes out the heat inside the cabinet 1, increases the heat dissipation speed, reduces the internal temperature of the cabinet 1, and further achieves the purpose of flame retardancy.

[0028] Example 2

[0029] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0030] A smoke detector is arranged in the cabinet 1. The smoke detector is a sensor known in the art and can detect smoke. When the electrical components inside the electrical cabinet initially burn, a large amount of smoke will be generated without obvious open flames. The smoke detector detects the inside of the cabinet 1 through smoke, so as to timely obtain whether the inside of the cabinet 1 is in the initial state of combustion; the electrical signal of the smoke detector is connected to the controller, and the controller is electrically connected to the carbon dioxide generating mechanism or the alarm, that is, after the controller obtains the signal of the smoke detector, it controls the carbon dioxide generating mechanism to generate carbon dioxide, or / and the controller controls the alarm to sound, so as to remind people to manually start the carbon dioxide generating mechanism to generate carbon dioxide.

[0031] Furthermore, the controller is connected to an external power supply or an internal power supply of an electrical cabinet, and the smoke detector and the carbon dioxide generating mechanism obtain working electrical energy through the controller; the purpose of setting up the controller is to improve its automation capability and response speed, so as to achieve the purpose of timely eliminating the risk of combustion inside the cabinet 1.

[0032] Furthermore, the controller is preferably a compilable controller such as a PLC or a single-chip microcomputer.

[0033] Of course, in another implementation mode, smoke detectors and controllers are not provided, and human patrols and observations can be performed to know that the interior of the electrical cabinet is in a burning state, thereby manually turning on the carbon dioxide generating mechanism.

[0034] Example 3

[0035] Based on any one of the implementations in Examples 1-2, a specific implementation method that can be implemented is further proposed.

[0036] In a feasible implementation, the carbon dioxide generating mechanism comprises a sliding chamber 2 and a reaction chamber 3, the sliding chamber 2 and the reaction chamber 3 are connected through a connecting hole, and the connecting hole is closed by a sealing member 71 having an opening pressure; the sliding chamber 2 is sealed and slidably connected with an extrusion plate 21 acted upon by a driving mechanism 4, and an acidic solution 22 is stored in the sliding chamber 2 between the extrusion plate 21 and the sealing member 71, and the acidic solution is preferably a hydrogen chloride solution, and calcium carbonate particles 31 are stored in the reaction chamber 3; the gas outlet 61 is connected to the reaction chamber 3. The specific manner in which the carbon dioxide generating mechanism generates carbon dioxide is as follows.

[0037] When combustion occurs inside the cabinet 1 and smoke is generated, the driving mechanism 4 works on the extrusion plate 21, driving the extrusion plate 21 to slide in the sliding chamber 2 toward the closing piece 71, thereby reducing the space between the extrusion plate 21 and the closing piece 71 and squeezing the acid solution 22 in the space; as the extrusion plate 21 moves, the pressure on the closing piece 71 gradually increases until the opening pressure is reached, the closing piece 71 opens, and the acid solution 22 enters the reaction chamber 3 from the connecting hole to chemically react with the calcium carbonate particles 31 to produce carbon dioxide, and the carbon dioxide flows out of the reaction chamber 3 from the air outlet 61 and enters the interior of the cabinet 1.

[0038] In this embodiment, an annular groove may be provided on the side walls of the extrusion plate 21, and a sealing ring is sleeved in the annular groove, and the outer wall of the sealing ring is in close contact with the inner wall of the sliding cavity 2 to achieve sealing. The purpose of the sealing is to ensure that when the extrusion plate 21 is acted upon by the driving mechanism 4, the pressure can be fully transmitted to the acid solution 22, and then to the sealing member 71.

[0039] In this embodiment, the closure member 71 is a diaphragm, and when the diaphragm is subjected to a sufficiently large pressure (limit pressure), the diaphragm ruptures and the connection hole 7 opens. Alternatively, the closure member 71 is a safety valve, and the safety valve has an opening pressure. When the pressure on the safety valve reaches the opening pressure, the safety valve opens and the connection hole 7 opens.

[0040] Example 4

[0041] Based on Example 3, a specific implementation method that can be implemented is further proposed.

[0042] A feasible implementation manner, the air outlet hole 61 is arranged on the air outlet pipe 6, the air inlet of the air outlet pipe 6 is connected to the top of the reaction chamber 3, and the air outlet pipe 6 is installed in the cabinet 1; the carbon dioxide generated in the reaction chamber 3 enters the air outlet pipe 6 from the air inlet of the air outlet pipe 6, and then flows out from the air outlet hole 61 into the interior of the cabinet 1; the purpose of setting the air outlet pipe 6 is to be able to arrange multiple and even air outlet holes 61, avoid opening the air outlet holes 61 on the reaction chamber 3, and reduce the manufacturing difficulty; the air inlet of the air outlet pipe 6 is connected to the top of the reaction chamber 3, the purpose of which is to prevent calcium carbide particles and acidic solution 22 from clogging the air outlet pipe 6, and to prevent the acidic solution 22 from entering the interior of the cabinet 1 through the air outlet pipe 6.

[0043] A feasible implementation manner is that a desiccant is arranged at the air inlet of the air outlet pipe 6, inside the air outlet pipe 6 or / and at the air outlet to dry the water vapor entrained in the carbon dioxide, prevent the water vapor from entering the cabinet 1, and prevent the water vapor from corroding the electrical components in a high temperature environment.

[0044] A feasible implementation method is that the air outlet pipe 6 is installed on the top of the cabinet 1, and the physical density of carbon dioxide is greater than the average density of air, and the density of hot air is lower than the average density of air, so as to achieve counterflow, ensure the temperature difference in the gas flow process, increase the amount of heat obtained by carbon dioxide, and thus improve the heat dissipation efficiency.

[0045] Example 5

[0046] On the basis of any one of the implementations described in Examples 3-4, a specific implementation of the "driving mechanism 4" is further proposed.

[0047] The first implementation method, such as Figure 1 , Figure 3 As shown, the driving mechanism 4 is a second fan 41, which is installed on the cabinet 1, and the wind direction of the second fan 41 is toward the side of the extrusion plate 21 away from the acid solution 22. The second fan 41 draws air from outside the cabinet 1 and inputs it into the sliding cavity 2, acting on the extrusion plate 21, so that the extrusion plate 21 squeezes the sealing member 71 through the acid solution 22.

[0048] The second implementation method, such as Figure 2As shown, the driving mechanism 4 is a linear telescopic mechanism 42, such as a pneumatic telescopic rod, a hydraulic telescopic rod or a linear motor, preferably a linear motor, to reduce the arrangement of the cylinder or the hydraulic cylinder; the fixed end of the linear telescopic mechanism 42 is connected to the cabinet 1, and the movable end of the linear telescopic mechanism 42 is connected to the extrusion plate 21, that is, the linear telescopic mechanism 42 can be arranged in a cavity without the acidic solution 22 in the sliding cavity 2, the linear telescopic mechanism 42 is extended, the extrusion plate 21 slides, and the closure 71 is squeezed by the acidic solution 22.

[0049] Based on the above two implementations in this embodiment, the driving mechanism 4 is electrically connected to the controller. According to whether the smoke detector obtains a smoke signal, the controller controls whether the driving mechanism 4 works; if the driving mechanism 4 is a pneumatic telescopic rod or a hydraulic telescopic rod, the controller can control the valves of the pneumatic telescopic rod and the hydraulic telescopic rod.

[0050] In a feasible implementation manner, an elastic member 5 is arranged between the side of the extrusion plate 21 away from the acidic solution 22 and the inner wall of the sliding chamber 2. The elastic member 5 has elastic deformation and is preferably a compression spring. The extrusion plate 21 will continue to be subjected to the elastic force of the elastic member 5. After the acidic solution 22 is completely squeezed and discharged into the reaction chamber 3, the extrusion plate 21 is subjected to the elastic force of the elastic member 5 to close the connecting hole 7 to prevent the carbon dioxide generated in the reaction chamber 3 from entering the sliding chamber 2. Of course, the sealing member 71 can also be a one-way sealing member 71 to further prevent the carbon dioxide generated in the reaction chamber 3 from entering the sliding chamber 2, such as a diaphragm of a one-way valve, a one-way valve combined with a safety valve.

[0051] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An electrical cabinet capable of preventing high temperature fire, characterized in that: The invention comprises a cabinet (1) having a heat dissipation hole (11), wherein the heat dissipation hole (11) communicates with the inside and outside of the cabinet (1); a carbon dioxide generating mechanism is arranged on the cabinet (1), and the carbon dioxide generating mechanism has an air outlet (61) communicated with the inside of the cabinet (1); the carbon dioxide generating mechanism comprises a sliding chamber (2) and a reaction chamber (3), the sliding chamber (2) and the reaction chamber (3) are communicated with each other through a communication hole, and the communication hole is closed by a sealing member (71) having an opening pressure; an extrusion plate (21) acted upon by a driving mechanism (4) is sealingly and slidably connected in the sliding chamber (2), an acid solution (22) is stored in the sliding chamber (2) between the extrusion plate (21) and the sealing member (71), and calcium carbonate particles (31) are stored in the reaction chamber (3); the air outlet (61) communicates with the reaction chamber (3); a smoke detector is arranged in the cabinet (1), and the smoke detector is electrically connected to a controller, and the controller is electrically connected to the carbon dioxide generating mechanism and / or an alarm.

2. The electrical cabinet according to claim 1, characterized in that: The air outlet hole (61) is arranged on the air outlet pipe (6), the air inlet of the air outlet pipe (6) is connected to the top of the reaction chamber (3), and the air outlet pipe (6) is installed in the cabinet (1).

3. The electrical cabinet according to claim 2, characterized in that: The air outlet pipe (6) is installed on the top of the cabinet (1).

4. The electrical cabinet according to claim 1, characterized in that: The driving mechanism (4) is a second fan (41), which is mounted on the cabinet (1), and the wind direction of the second fan (41) is toward a side of the extrusion plate (21) away from the acid solution (22).

5. The electrical cabinet according to claim 1, characterized in that: The driving mechanism (4) is a linear telescopic mechanism (42), the fixed end of the linear telescopic mechanism (42) is connected to the cabinet (1), and the movable end of the linear telescopic mechanism (42) is connected to the extrusion plate (21).

6. The electrical cabinet according to claim 4 or 5, characterized in that: The driving mechanism (4) is electrically connected to the controller.

7. The electrical cabinet according to claim 1, characterized in that: An elastic member (5) is provided between a side of the extrusion plate (21) away from the acid solution (22) and an inner wall of the sliding cavity (2).

8. The electrical cabinet according to claim 1, characterized in that: The closing member (71) is a diaphragm or a safety valve.

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