Gas-insulated metal-enclosed switchgear
By designing a low-boiling refrigerant circulation system in a gas-insulated metal-enclosed switchgear, efficient cooling is achieved using the principles of evaporation and condensation, the problem of excessive temperature inside the equipment is solved and the normal operating efficiency of the equipment is improved.
Patent Information
- Application Number
- CN202420982029.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-08
AI Technical Summary
During use, the gas insulated metal sealed switch equipment uses normal ventilation and heat dissipation mechanism during use, resulting in high internal temperature of the equipment and poor cooling effect, which affects the normal operating efficiency of the equipment.
A system including cabinets, refrigeration bins, heat dissipation fans, drainage air ducts, convergence tanks, diversion tubes, collection tanks, return tubes and evaporation tubes were designed, and the low boiling point refrigerant (Freon) was used to evaporate and condense the flower. The fan blows in cold air for circulation and cools down.
It achieves a more efficient cooling effect, reduces the internal temperature of the equipment, improves the normal operating efficiency of the equipment, and does not require frequent replacement of the heat dissipation material.
Smart Images
Figure CN222261913U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power equipment, and in particular to a gas-insulated metal-enclosed switchgear. Background Art
[0002] Gas-insulated metal-enclosed switchgear is a metal-enclosed switchgear and control equipment that uses gas at a pressure higher than atmospheric pressure as the insulating medium in at least part of its structure. Gas-insulated metal-enclosed switchgear consists of circuit breakers, disconnectors, earthing switches, transformers, lightning arresters, busbars, connectors and outgoing line terminals. All of these devices or components are enclosed in a metal grounded casing, which is filled with SF6 insulating gas at a certain pressure, so it is also called SF6 fully enclosed combination electrical equipment.
[0003] Compared with the actual use process, the existing gas-insulated metal-enclosed switchgear, one of the heat dissipation mechanisms during use adopts normal ventilation heat dissipation. Since the internal flow of the gas-insulated metal-enclosed switchgear is high pressure, this leads to a high temperature inside the equipment. The ventilation cooling method will reduce the cooling effect, thereby affecting the normal operating efficiency of the equipment.
[0004] Therefore, in order to solve the above problems, the present application provides a gas-insulated metal-enclosed switchgear.
[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0006] In order to solve the problem of heat dissipation difficulty of equipment, the present application provides a gas-insulated metal-enclosed switchgear.
[0007] A gas-insulated metal-enclosed switchgear provided in the present application comprises a cabinet, a refrigeration bin is welded on the top of the cabinet, a heat dissipation fan is installed on the top of the refrigeration bin through a base, drainage ducts are welded on both ends of the outer side of the refrigeration bin, a confluence tank is welded on one end of the inner side of the refrigeration bin through a bracket, a plurality of guide pipes are connected to the outer side of one end of the confluence tank, liquid outlet ends of the plurality of guide pipes are connected to a confluence tank, both ends of the outer side of the confluence tank are connected to a return pipe, and an evaporation tube is connected to the top of the confluence tank;
[0008] An evaporation bin is welded at the bottom of the cabinet, storage boxes are welded at both ends of the inner side of the evaporation bin, a plurality of single-piece square tubes are clamped and connected between the two storage boxes, and an evaporation collection square tube is connected between the plurality of single-piece square tubes.
[0009] Preferably, the air inlet ends of the two air guide ducts extend to the inner top of the refrigeration compartment, and the air outlet ends of the two air guide ducts extend to the inner top of the cabinet.
[0010] Preferably, the vertical height of the confluence tank compared to the bottom end of the inner side of the refrigeration warehouse is greater than the vertical height of the collection tank compared to the bottom end of the inner side of the refrigeration warehouse.
[0011] Preferably, the vertical height of the liquid outlet end of the return pipe relative to the inner side of the refrigeration bin is smaller than that of the liquid inlet end thereof, and both liquid outlet ends of the return pipes pass through the refrigeration bin and the evaporation bin and are connected to one end of the two storage boxes.
[0012] Preferably, the liquid inlet end of the evaporation tube passes through the evaporation bin and is connected to one end of the evaporation collecting square tube.
[0013] Preferably, two drain pipes are connected to both ends of the outer side of the refrigeration bin.
[0014] In summary, this application includes the following beneficial technical effects:
[0015] 1. Taking advantage of the low boiling point of the refrigerant, an evaporation mechanism is set at the bottom of the cabinet to evaporate and absorb heat. The refrigerant after evaporation condenses and absorbs heat. The fan blows the cold air at the condensation end into the cabinet, and the refrigerant is recycled through the pipeline mechanism. Compared with the existing technology, it has a more efficient cooling method, is more affordable, and does not need to be replaced frequently. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the cabinet installation structure in the first embodiment of the present application;
[0017] Figure 2 This is a schematic diagram of the installation structure of the evaporation bin in Example 1 of the present application;
[0018] Figure 3 It is a schematic diagram of the storage box installation structure in Example 1 of the present application.
[0019] Explanation of the reference numerals: 1. Cabinet; 2. Refrigeration compartment; 3. Cooling fan; 4. Drainage duct; 5. Converging tank; 6. Guide pipe; 7. Collecting tank; 8. Reflux pipe; 9. Evaporation pipe; 10. Evaporation compartment; 11. Storage box; 12. Single-piece square tube; 13. Evaporation and collecting square tube; 14. Drain pipe. DETAILED DESCRIPTION
[0020] The following is combined with Figure 1-Figure 3 This application is described in further detail.
[0021] Embodiment 1
[0022] Reference Figure 1-Figure 3A gas-insulated metal-enclosed switchgear comprises a cabinet 1, a refrigeration bin 2 is welded on the top of the cabinet 1, a heat dissipation fan 3 is installed on the top of the refrigeration bin 2 through a base, in order to blow the cold air generated by the refrigeration mechanism so that it can enter the cabinet 1, drainage ducts 4 are welded on both ends of the outer side of the refrigeration bin 2, the air inlet ends of the two drainage ducts 4 extend through the inner top of the refrigeration bin 2, and the air outlet ends of the two drainage ducts 4 extend through the inner top of the cabinet 1, and a confluence tank 5 is welded on one end of the inner side of the refrigeration bin 2 through a bracket, in order to realize the condensation phenomenon, heat absorption is performed Refrigeration, a plurality of guide tubes 6 are connected to the outer side of one end of the confluence tank 5, and the liquid outlet ends of the plurality of guide tubes 6 are connected to the confluence tank 7. The vertical height of the confluence tank 5 compared to the inner bottom end of the refrigeration bin 2 is greater than the vertical height of the confluence tank 7 compared to the inner bottom end of the refrigeration bin 2. In order to facilitate the refrigeration of the refrigerant, the refrigerant is Freon, which has an extremely low boiling point. The heat absorption phenomenon of the condensation of the steam after the boiling of Freon is used for refrigeration, thereby achieving the effect of rapid heat dissipation. The two ends of the outer side of the confluence tank 7 are connected to the return pipe 8, and the top of the confluence tank 5 is connected to the evaporation tube 9, in order to realize the recycling of the refrigerant;
[0023] An evaporation bin 10 is welded to the bottom end of the cabinet 1, and the liquid outlet end of the return pipe 8 is smaller than the liquid inlet end thereof at a vertical height relative to the inner side of the refrigeration bin 2. The liquid outlet ends of the two refrigeration pipes 8 pass through the refrigeration bin 2 and the evaporation bin 10 and are connected to one end of two storage boxes 11. Storage boxes 11 are welded to both ends of the inner side of the evaporation bin 10, and a plurality of single-piece square tubes 12 are clamped and connected between the two storage boxes 11. In order to fully receive hot air and allow the refrigerant liquid inside the two storage boxes 11 to fully absorb heat, an evaporation collecting square tube 13 is connected between the plurality of single-piece square tubes 12. In order to allow multiple single-piece square tubes 12 to evaporate through the same output end after being heated and boiled, the liquid inlet end of the evaporation tube 9 passes through the evaporation bin 10 and is connected to one end of the evaporation collecting square tube 13. Two drain pipes 14 are connected to both ends of the outer side of the refrigeration bin 2.
[0024] Working principle: First, the operator starts the cabinet 1. During the operation of the cabinet 1, the temperature inside the cabinet 1 will rise sharply due to the continuous passage of high voltage electricity, and this temperature will be maintained all year round. If there is no human intervention, the cabinet 1 will not be able to work normally. After the temperature inside the cabinet 1 rises, the storage box 11 inside the evaporation bin 10 installed at the bottom of the cabinet 1 will absorb heat from the cabinet 1, because Freon is stored in the storage box 11. Due to the low boiling point of Freon, when the temperature of the cabinet 1 rises slightly, the Freon inside the storage box 11 will absorb Heat, as the heat of the storage box 11 increases, the Freon inside it will boil, and then evaporate through the evaporation tube 9 connected to one end of the evaporation collection square tube 13, and the Freon gas will enter the refrigeration warehouse 2 at the top of the cabinet 1 along the evaporation tube 9, and first the gas will enter the inside of the confluence tank 5 installed inside the refrigeration warehouse 2, and after entering the confluence tank 5, the Freon gas will condense and sublimate due to the low temperature inside the confluence tank 5, during which the gas will absorb a lot of heat, and the condensed Freon will enter the inside of the confluence tank 7 along the several guide tubes 6 connected to the liquid outlet end of the confluence tank 5;
[0025] Then it will flow back to the storage box 11 through the two return pipes 8 connected to the liquid outlet end of the collecting tank 7. During this period, the temperature of the collecting tank 5, the guide pipe 6 and the collecting tank 7 will decrease due to condensation. At that time, the operator will start the heat dissipation fan 3 installed on the top of the cabinet 1. At that time, the heat dissipation fan 3 will blow air into the refrigeration warehouse 2, and the collecting tank 5, the guide pipe 6 and the collecting tank 7 will cool the wind flowing through their outer surfaces. The wind will enter the cabinet 1 along the drainage ducts 4 welded at both ends of the outer side of the refrigeration warehouse 2, and cool the devices inside the cabinet 1. Then the wind will pass through the bottom of the cabinet 1 again Enter the interior of the evaporation bin 10 and blow through the surfaces of several single-piece square tubes 12 welded between the two storage boxes 11, and reheat the Freon that flows back into the single-piece square tube 12 to make it continue to boil. In this way, the cabinet 1 can be continuously cooled down by repeating the cycle. Since the interior of the refrigeration bin 2 will continue to undergo an endothermic reaction and the temperature will decrease, two drain pipes 14 are welded at both ends of the outer side of the cabinet 1 to prevent water mist from condensing inside the refrigeration bin 2, so as to prevent the moisture inside the refrigeration bin 2 from affecting the cabinet 1. This design enables the cabinet 1 to continuously dissipate heat with extremely high heat dissipation efficiency.
[0026] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A gas-insulated metal-enclosed switchgear, comprising a cabinet (1), characterized in that: A refrigeration bin (2) is welded to the top of the cabinet (1), a heat dissipation fan (3) is installed on the top of the refrigeration bin (2) through a base, drainage ducts (4) are welded to both ends of the outer side of the refrigeration bin (2), a confluence tank (5) is welded to one end of the inner side of the refrigeration bin (2) through a bracket, a plurality of guide pipes (6) are connected to the outer side of one end of the confluence tank (5), the liquid outlet ends of the plurality of guide pipes (6) are connected to a collection tank (7), both ends of the outer side of the collection tank (7) are connected to a return pipe (8), and an evaporation tube (9) is connected to the top of the confluence tank (5); An evaporation bin (10) is welded to the bottom of the cabinet (1), storage boxes (11) are welded to both ends of the inner side of the evaporation bin (10), a plurality of single-piece square tubes (12) are clamped and connected between the two storage boxes (11), and an evaporation collection square tube (13) is connected between the plurality of single-piece square tubes (12).
2. A gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The air inlet ends of the two drainage air ducts (4) extend through the inner top of the refrigeration bin (2), and the air outlet ends of the two drainage air ducts (4) extend through the inner top of the cabinet (1).
3. The gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The vertical height of the confluence tank (5) compared to the inner bottom end of the refrigeration bin (2) is greater than the vertical height of the collection tank (7) compared to the inner bottom end of the refrigeration bin (2).
4. The gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The liquid outlet end of the return pipe (8) is at a smaller vertical height relative to the inner side of the refrigeration bin (2) than the liquid inlet end thereof, and the two liquid outlet ends of the return pipe (8) both pass through the refrigeration bin (2) and the evaporation bin (10) and are connected to one end of the two storage boxes (11).
5. The gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The liquid inlet end of the evaporation tube (9) passes through the evaporation bin (10) and is connected to one end of the evaporation collecting square tube (13).
6. The gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: Two drainage pipes (14) are connected to both ends of the outer side of the refrigeration bin (2).