Isolation switch cabinet

Abstract

The invention discloses an isolation switch cabinet which comprises a cabinet body, a plurality of air cooling devices connected in series through air supply pipes are arranged on the inner wall of the cabinet body, each air cooling device comprises a shell, the shell is provided with a penetrating vertical pipe, the two ends of the vertical pipe are connected with the air supply pipes, a piston pipe is arranged on the side, located on the vertical pipe, in the shell, and a piston is arranged in the piston pipe. The space, corresponding to the lower side of the piston, in the piston pipe is a sealing cavity, inert gas with the large expansion coefficient is arranged in the sealing cavity, air in the air supply pipe passes through the first air outlet pipe and the second air outlet pipe and then is jetted to parts in the cabinet body, and internal cooling is carried out. At the moment, the piston and the pull rod move upwards to limit positions, the ellipsoid plug seals the second gas outlet pipe, oxygen is prevented from entering, the piston is matched with the inclined face of the inner end of the pricking needle to push the pricking needle towards the high-pressure gas bag to pierce the high-pressure gas bag, and the function of automatically spraying a fire extinguishing agent to extinguish fire when the temperature is too high is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation of switch cabinets, and in particular to an isolating switch cabinet. Background Art

[0002] The switch cabinet is an electrical equipment. The external line of the switch cabinet first enters the main control switch inside the cabinet, and then enters the sub-control switch. Each branch is set according to its needs. The main function of the switch cabinet is to open and close, control and protect electrical equipment during the power generation, transmission, distribution and energy conversion of the power system. The components in the switch cabinet mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protective devices; various electrical equipment will generate heat in the switch cabinet. Excessive heat that cannot be dissipated will easily age the equipment and reduce its service life. Local high temperature can also easily cause fires, resulting in serious consequences. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an isolating switch cabinet with heat dissipation function.

[0004] To solve the above technical problems, the present invention includes a cabinet, wherein a plurality of air-cooling devices connected in series through air supply ducts are arranged on the inner wall of the cabinet, the air-cooling device includes a shell, a vertical pipe is arranged running through the shell, both ends of the vertical pipe are connected to the air supply duct, a piston tube is arranged on one side of the vertical pipe in the shell, a piston is arranged in the piston tube, a lower space corresponding to the piston in the piston tube is a sealed chamber, an inert gas with a large expansion coefficient is arranged in the sealed chamber, a rack is fixedly installed on the upper end of the piston, the upper end of the rack extends out from the upper end of the piston tube, a first air outlet pipe is arranged on one side of the vertical pipe corresponding to the direction of the rack, a second air outlet pipe coaxial with the first air outlet pipe is arranged on the side of the shell, the ends of the first air outlet pipe and the second air outlet pipe that are close to each other are jointly covered with a sleeve, the first air outlet pipe and the second air outlet pipe are both connected to the sleeve by threads, a plurality of long teeth are arranged in a ring shape on the outer side of the sleeve, the rack is meshed with the long teeth, an ellipsoid plug is arranged at the close end of the first air outlet pipe and the second air outlet pipe, and the side of the ellipsoid plug is fixedly connected to the inner wall of the sleeve by a connecting piece.

[0005] In order to improve the sealing effect when in contact with the ellipsoid plug, sealing rings are provided at the ends of the first air outlet pipe and the second air outlet pipe that are close to each other.

[0006] In order to improve the heat conduction effect, a heat conduction component is arranged at the lower part of the sealed cavity, a part of the heat conduction component is located outside the shell, and the other part is located inside the sealed cavity.

[0007] In order to improve the heat conduction effect, the heat conduction component includes a first heat conduction fin outside the shell and a second heat conduction fin in the sealed cavity, and the first heat conduction fin and the second heat conduction fin are connected through a heat conduction plate.

[0008] In order to realize the fire extinguishing function if there is a flame, a fire extinguishing agent container is embedded in the side of the shell, the opening of the fire extinguishing agent container faces outward and the opening is sealed by a diaphragm, a high-pressure gas bag is arranged on the inside of the fire extinguishing agent container, and the fire extinguishing agent is filled between the corresponding high-pressure gas bag and the diaphragm in the fire extinguishing agent container. A stinging needle is movably arranged between the piston tube and the fire extinguishing agent container, one end of the stinging needle extends into the piston tube, and the piston moves up to the extreme position to push the stinging needle to move toward the high-pressure gas bag.

[0009] Preferably, the needle penetrates the upper part of the piston tube and can slide along the through hole, one end of the needle is located in the piston tube and is provided with a downward inclined surface, and the other end of the needle with a needle tip extends into the fire extinguishing agent container and is in sliding contact with the side wall of the fire extinguishing agent container.

[0010] Preferably, a pull rod is provided at the bottom of the piston, and the lower end of the pull rod passes through the lower end of the piston tube and the bottom of the shell and is connected to a sealing block. The sealing block is made of plastic material, and the sealing block seals the penetration point between the pull rod and the shell. A sealing tube is provided at the bottom of the piston tube and is sleeved on the lower end of the pull rod. The pull rod and the inner wall of the sealing tube are sealed and fit together.

[0011] Preferably, the sealing block is made of polypropylene.

[0012] Preferably, the heat conducting plate is made of copper.

[0013] To sum up, when the present invention is used, at room temperature, the temperature in the sealed cavity is low and the inert gas does not expand. When the temperature in the cabinet rises, the heat is transferred to the sealed cavity through the heat-conducting component. At this time, the inert gas heats up and expands, driving the piston to move upward, and the rack moves upward to drive the sleeve to rotate. The sleeve drives the ellipsoid plug to move and open the first air outlet pipe. At this time, the air in the air supply pipe passes through the first air outlet pipe and the second air outlet pipe and is sprayed onto the components in the cabinet to cool the inside. If a fire occurs and the temperature exceeds the specified temperature, the piston and the pull rod move up to the extreme position. At this time, the ellipsoid plug seals the second air outlet to prevent oxygen from entering. The piston cooperates with the inclined surface of the inner end of the needle to push the needle in the direction of the high-pressure gas bag, puncture the high-pressure gas bag, and realize the automatic spraying of fire extinguishing agent to extinguish the fire when the temperature is too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1 It is a schematic diagram of the internal structure of the cabinet of the present invention; Figure 2 It is a schematic diagram of the external structure of the cabinet of the present invention; Figure 3 for Figure 1 Schematic diagram of the structure of part I; Figure 4 for Figure 3 Schematic diagram of the structure of part II; Figure 5 for Figure 3 Schematic diagram of the structure of part III; Figure 6 for Figure 3 Schematic diagram of the structure of Part IV. DETAILED DESCRIPTION

[0015] Referring to the accompanying drawings, the isolating switch cabinet includes a cabinet body 1, and a plurality of air cooling devices are arranged on the inner wall of the cabinet body 1. The air cooling device includes a shell 2, and the shell 2 is provided with a vertical pipe 3 penetrating therethrough. Both ends of the vertical pipe are connected to the air supply pipe. A piston tube 4 is arranged on one side of the vertical pipe in the shell, and a piston 5 is arranged in the piston tube. The lower space of the piston tube corresponding to the piston 5 is a sealed chamber 6, and an inert gas with a large expansion coefficient, such as helium and argon, is arranged in the sealed chamber 6. A rack 7 is fixedly installed on the upper end of the piston, and the upper end of the rack is connected to the piston tube. The upper end of the vertical pipe extends out, a first air outlet pipe 8 is arranged on one side of the vertical pipe 3 corresponding to the direction of the rack, a second air outlet pipe 9 coaxial with the first air outlet pipe is arranged on the side of the shell body, and the ends of the first air outlet pipe and the second air outlet pipe 9 that are proximal to each other are jointly covered with a sleeve 10, the first air outlet pipe and the second air outlet pipe 9 are connected to the sleeve by threads, a plurality of long teeth are arranged in a ring shape on the outer side of the sleeve, the rack is meshed with the long teeth, an ellipsoid plug 11 is arranged at the proximal end of the first air outlet pipe and the second air outlet pipe, and the side of the ellipsoid plug is fixedly connected to the inner wall of the sleeve by a connecting piece.

[0016] The ellipsoid plug moves laterally with the sleeve to seal the first air outlet pipe or the second air outlet pipe. A sealing ring 12 is provided at one end of the first air outlet pipe and the second air outlet pipe. This design can improve the sealing effect when in contact with the ellipsoid plug.

[0017] When the piston moves up and down, the rack and the long teeth cooperate to drive the sleeve to rotate. At this time, the sleeve moves along the length direction of the first air outlet pipe and the second air outlet pipe. When the ellipsoid plug is close to the first air outlet pipe, the first air outlet pipe can be blocked. When the ellipsoid plug is close to the second air outlet pipe, the second air outlet pipe can be blocked.

[0018] A heat-conducting component is arranged at the lower part of the sealing cavity, a part of which is located outside the shell, and the other part is located inside the sealing cavity. The heat outside the shell can be transferred to the sealing cavity in time through the heat-conducting component, thereby improving the reaction time of the piston movement.

[0019] The heat conducting component includes a first heat conducting fin 13 outside the shell and a second heat conducting fin 14 in the sealed cavity. The first heat conducting fin 13 and the second heat conducting fin 14 are connected by a heat conducting plate 15. The heat conducting plate is preferably made of a material with a high thermal conductivity, preferably silver or copper.

[0020] The side of the shell is embedded with a fire extinguishing agent container 16, the opening of the fire extinguishing agent container 16 faces outward and is sealed by a diaphragm 17. A high-pressure gas bag 18 is arranged inside the fire extinguishing agent container, and a fire extinguishing agent 19 is filled between the corresponding high-pressure gas bag and the diaphragm 17 in the fire extinguishing agent container. The fire extinguishing agent is preferably dry powder. A puncture needle 20 is arranged between the piston tube and the fire extinguishing agent container. When the temperature in the cabinet is too high and exceeds the warning value, the piston moves up to the limit position to push the puncture needle to move toward the high-pressure gas bag and puncture it. At this time, the high-pressure gas in the high-pressure gas bag instantly releases the pressure to spray the fire extinguishing agent from the opening of the fire extinguishing agent container. If there is a flame, the fire is extinguished. If there is no flame, the surface of the parts is covered with fire extinguishing agent to suppress the possibility of combustion.

[0021] A needle that can slide along the through hole is arranged through one side of the upper part of the piston tube, one end of the needle is located in the piston tube and is provided with an inclined surface obliquely downward, the other end of the needle with a needle tip extends into the fire extinguishing agent container and is in sliding contact with the side wall of the fire extinguishing agent container, the needle is set with a spring 21, one end of the spring is fixedly connected to the side of the needle, and the other end of the spring is fixedly connected to the side of the piston tube.

[0022] A pull rod 22 is arranged at the bottom of the piston, and the lower end of the pull rod 22 passes through the lower end of the piston tube and the bottom of the shell and is connected to a sealing block 24. The sealing block is made of plastic material, preferably polypropylene. Under normal circumstances, the sealing block seals the penetration of the pull rod and the shell. A sealing tube 23 is arranged at the bottom of the piston tube and is sleeved on the lower end of the pull rod. The pull rod and the inner wall of the sealing tube are sealed and fitted. When the temperature in the cabinet is too high, the temperature in the sealed cavity is higher. At this time, the internal gas pressure is greater. When the external temperature exceeds the melting point of the sealing block, the sealing block begins to melt and releases the fixation of the pull rod. At this time, the piston and the pull rod move up to the limit position. At this time, the ellipsoid plug seals the second outlet pipe to prevent oxygen from entering. The piston cooperates with the inclined surface of the inner end of the puncture needle to push the puncture needle toward the high-pressure gas bag and puncture the high-pressure gas bag. Automatically spraying the fire extinguishing agent when the temperature is too high.

[0023] Working principle: Each air cooling device serves as a heat dissipation module and can be set at the position of important parts in the cabinet that are prone to high temperature, so that the air outlet of the second air outlet pipe is aimed at the important parts. Multiple air cooling devices can be connected in series through the air supply pipe. When in use, under normal temperature, the temperature in the sealed cavity is low and the inert gas does not expand. When the temperature in the cabinet rises, the heat is transferred to the sealed cavity through the heat-conducting component. At this time, the inert gas heats up and expands, driving the piston to move up, and the rack moves up to drive the sleeve to rotate. The sleeve drives the ellipsoid plug to move and open the first air outlet. At this time, the air in the air supply pipe passes through the first air outlet pipe and the second air outlet pipe and is sprayed onto the parts in the cabinet to cool the inside. If a fire occurs and the temperature exceeds the specified temperature, the piston and the pull rod move up to the limit position. At this time, the ellipsoid plug seals the second air outlet to prevent oxygen from entering. The piston cooperates with the inclined surface of the inner end of the needle to push the needle toward the high-pressure gas bag and puncture the high-pressure gas bag, so as to realize the automatic spraying of fire extinguishing agent for fire extinguishing when the temperature is too high.

[0024] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An isolating switch cabinet, characterized in that: The invention comprises a cabinet body, wherein a plurality of air-cooling devices connected in series through air supply pipes are arranged on the inner wall of the cabinet body, the air-cooling device comprises a shell body, a vertical pipe is arranged running through the shell body, both ends of the vertical pipe are connected to the air supply pipes, a piston tube is arranged on one side of the vertical pipe in the shell body, a piston is arranged in the piston tube, a lower space corresponding to the piston in the piston tube is a sealed chamber, an inert gas with a large expansion coefficient is arranged in the sealed chamber, a rack is fixedly installed on the upper end of the piston, the upper end of the rack extends out from the upper end of the piston tube, a first air outlet pipe is arranged on one side of the vertical pipe in the direction corresponding to the rack, a second air outlet pipe coaxial with the first air outlet pipe is arranged on the side of the shell body, ends of the first air outlet pipe and the second air outlet pipe are jointly covered with a sleeve, the first air outlet pipe and the second air outlet pipe are both connected to the sleeve by threads, a plurality of long teeth are arranged in a ring shape on the outer side of the sleeve, the rack is meshed with the long teeth, an ellipsoid plug is arranged at the proximal end of the first air outlet pipe and the second air outlet pipe, and the side of the ellipsoid plug is fixedly connected to the inner wall of the sleeve by a connecting piece.

2. The isolating switch cabinet according to claim 1, characterized in that : Sealing rings are provided at the ends close to the first air outlet pipe and the second air outlet pipe.

3. The isolating switch cabinet according to claim 1, characterized in that : A heat-conducting component is arranged at the lower part of the sealed cavity, a part of the heat-conducting component is located outside the shell, and the other part is located inside the sealed cavity.

4. The isolating switch cabinet according to claim 1, characterized in that : The heat-conducting component includes a first heat-conducting fin outside the shell and a second heat-conducting fin in the sealed cavity, and the first heat-conducting fin and the second heat-conducting fin are connected through a heat-conducting plate.

5. The isolating switch cabinet according to claim 1, characterized in that : A fire extinguishing agent container is embedded in the side of the shell, the opening of the fire extinguishing agent container faces outward and is sealed by a diaphragm, a high-pressure gas bag is arranged on the inner side of the fire extinguishing agent container, and the fire extinguishing agent is filled between the corresponding high-pressure gas bag and the diaphragm in the fire extinguishing agent container, a needle is movably arranged between the piston tube and the fire extinguishing agent container, one end of the needle extends into the piston tube, and the piston moves up to the limit position to push the needle to move toward the high-pressure gas bag.

6. The isolating switch cabinet according to claim 5, characterized in that : The puncture needle penetrates the upper part of the piston tube and can slide along the through hole. One end of the puncture needle is located in the piston tube and is provided with a downward inclined surface. The other end of the puncture needle with a needle tip extends into the fire extinguishing agent container and is in sliding contact with the side wall of the fire extinguishing agent container.

7. The isolating switch cabinet according to claim 6, characterized in that : A pull rod is arranged at the bottom of the piston, and the lower end of the pull rod passes through the lower end of the piston tube and the bottom of the shell and is connected to a sealing block. The sealing block is made of plastic material, and the sealing block seals the penetration point between the pull rod and the shell. A sealing tube is arranged at the bottom of the piston tube and is sleeved on the lower end of the pull rod. The pull rod and the inner wall of the sealing tube are sealed and fit together.

8. The isolating switch cabinet according to claim 1, characterized in that : Sealing block is made of polypropylene.

9. The isolating switch cabinet according to claim 4, characterized in that : The heat conducting plate is made of copper.

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