CN213937198U - Novel inflatable low-voltage cabinet - Google Patents

Abstract

The utility model relates to the field of low-voltage cabinets, in particular to a novel inflatable low-voltage cabinet, which comprises a low-voltage cabinet body filled with sulfur hexafluoride gas; the sealing device is arranged at the joint of the low-voltage cabinet door and the low-voltage cabinet body and is used for preventing sulfur hexafluoride gas in the low-voltage cabinet body from leaking; a bus used for connecting an electric appliance in the low-voltage cabinet body is integrally cast, and the joint of the bus and the electric appliance is welded and fixed; the sulfur hexafluoride gas is filled in the gas-filled cabinet, and the sulfur hexafluoride gas is prevented from leaking out through the sealing device, so that the equipment is fully-closed gas insulation equipment, the resistance of electric appliance connection is small, and the reliability of the electric appliance is greatly improved compared with the traditional switch cabinet; aerify the interior generating line that is used for connecting electrical apparatus of cabinet and adopt integrative casting shaping, its and need assemble the generating line that forms through the bolt among the prior art and compare, resistance is little, can not appear crimping department insecure problem moreover, and after the generating line circular telegram, self electric conductivity is reliable.

Description

Novel inflatable low-voltage cabinet

Technical Field

The utility model relates to a low-voltage board field especially relates to a novel aerify low-voltage board.

Background

The low-voltage cabinet is mainly used for opening and closing, controlling and protecting electric equipment in the process of generating electricity, transmitting electricity, distributing electricity and converting electric energy of an electric power system. The components in the low-voltage cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. The device is mainly suitable for various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, industrial and mining enterprises, residential districts, high-rise buildings, marine electrical equipment and the like;

however, the existing low-voltage cabinet has the following problems;

firstly, the electrical equipment of the prior common low-voltage switch cabinet is exposed in the air, and the moisture, dust and harmful chemical components in the air influence the insulation performance of the equipment, so that electrical accidents such as short circuit and discharge and mechanical accidents such as mechanical failure occur easily.

Secondly, in the existing low-voltage cabinet (as shown in figure 1), the buses are assembled by bolts, and the connection between the buses and equipment is also realized by bolt compression. The connection mode has large connection resistance; the temperature change can cause looseness, the virtual connection phenomenon occurs, the self conductive reliability is influenced, and the connection resistance is increased; the electric energy is wasted, and accidents (bus overheating or poor connection at a compression joint, electric sparks occur, and the fire is generated in the cabinet body) can also happen when the electric energy is serious.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a novel aerify low-voltage cabinet solves above-mentioned problem.

A novel inflatable low-voltage cabinet comprises a low-voltage cabinet body filled with sulfur hexafluoride gas; the sealing device is arranged at the joint of the low-voltage cabinet door and the low-voltage cabinet body and is used for preventing sulfur hexafluoride gas in the low-voltage cabinet body from leaking; the bus used for connecting the electric appliance in the low-voltage cabinet body is integrally cast and formed, and the joint of the bus and the electric appliance is welded and fixed.

And only two wiring through grooves serving as a cabinet inlet wire port and a cabinet outlet wire port are formed in the low-voltage cabinet body.

The device also comprises a wiring busbar; the female one end of arranging of wiring passes through the wiring and leads to the internal portion of low-voltage cabinet, and its other end leads to the groove through the wiring and extends to the external portion of low-voltage cabinet.

The part of the wiring busbar exposed outside the low-voltage cabinet body is covered with an insulating material.

And insulating sealant is filled at the joint of the wiring busbar and the wiring through groove.

The sealing device comprises a sealing gasket I which is embedded in the edge of the inner side of the low-voltage cabinet body in a surrounding manner, and a sealing gasket II is embedded in the position, corresponding to the low-voltage cabinet body, of the low-voltage cabinet door in a surrounding manner;

the sealing gasket I is provided with a square groove, and the sealing gasket II is provided with a sealing convex strip wedged with the square groove.

The inner wall of the square-shaped groove is relatively provided with an inflatable strip which is used for filling a gap reserved after the sealing convex strip is wedged with the groove.

Compared with the prior art, the utility model discloses the beneficial effect of equipment is:

1. the utility model discloses the equipment aerifys the cabinet intussuseption and is filled with sulfur hexafluoride gas to prevent through sealing device that sulfur hexafluoride gas from leaking, it is internal to have avoided the outside air to get into the low-voltage cabinet, and for totally enclosed gas-insulated equipment, the resistance that the electrical apparatus is connected is little, compares the electrical apparatus reliability with traditional cubical switchboard and improves greatly.

2. The utility model discloses equipment, the generating line that is used for connecting electrical apparatus in the gas charging cabinet adopts integrative casting shaping, and it is compared with the generating line that needs to be assembled through the bolt in the prior art, and resistance is little, and can not appear the insecure problem of crimping department, and after the generating line circular telegram, self electric conductivity is reliable; in addition, the floor area of the low-pressure cabinet body is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a conventional bus bar.

Fig. 2 is a schematic structural diagram of a low-voltage cabinet body in a novel inflatable low-voltage cabinet.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is an enlarged view of fig. 2 at B.

Fig. 5 is a schematic structural diagram of a low-voltage cabinet door in a novel inflatable low-voltage cabinet.

Fig. 6 is an enlarged view of fig. 5 at C.

Fig. 7 is a schematic structural view of the air inlet fan, the air outlet fan, and the air deflector.

Fig. 8 is a sectional view of a novel inflatable low-pressure tank.

In the drawings: the low-voltage cabinet comprises a low-voltage cabinet body 1, a low-voltage cabinet door 2, a bus 3, a wiring busbar 4, a sealing gasket I5, a sealing gasket II6, a groove 7, a sealing convex strip 8, an air inflation strip 9, a wiring through groove 10, a heat dissipation chamber, an air inlet fan 12, an air outlet fan 13 and a guide plate 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

A novel inflatable low-voltage cabinet comprises a low-voltage cabinet body 1 filled with sulfur hexafluoride gas; a sealing device is arranged at the joint of the low-voltage cabinet door 2 and the low-voltage cabinet body 1 and is used for preventing sulfur hexafluoride gas in the low-voltage cabinet body 1 from leaking; a bus 3 used for connecting an electric appliance in the low-voltage cabinet body 1 is integrally cast, and the joint of the bus 3 and the electric appliance is welded and fixed; it compares with the generating line that forms through the bolt assembly among the prior art, and resistance is little, and the insecure problem in crimping department can not appear in integrative casting moreover, and 3 circular telegrams backs of generating line, self electric conductivity is reliable.

Specifically, the equipment further comprises a vacuum air extractor and an air injection machine, wherein the output ends of the vacuum air extractor and the air injection machine extend to the interior of the low-voltage cabinet body 1 through a two-way pipe, when the low-voltage cabinet door 2 and the low-voltage cabinet body 1 are closed, the vacuum air extractor is started to extract air in the low-voltage cabinet body 1, then the air injection machine is started to inject sulfur hexafluoride insulating gas with micro-positive pressure, so that external pollution is avoided, and the insulating property is improved; preferably, the sulfur hexafluoride gas after temperature reduction is adopted, and the sulfur hexafluoride gas after temperature reduction is adopted for circulation, so that the temperature of equipment can be reduced, and the overload capacity of the switch cabinet is improved. The connection form of the bus and the equipment is improved by adopting the modes of integral casting, welding and the like, so that the connection resistance is reduced to the minimum, the heating is reduced, the purposes of saving energy and improving the reliability are achieved, and the insulation level is improved;

in addition, the design that at least two groups of buses are fixedly connected through bolts after being pressed together is cancelled, the distance between electrical appliances is reduced, and the volume of the low-voltage cabinet body 1 is reduced, so that the purpose of reducing occupied space is achieved.

Specifically, only two wiring through grooves 10 serving as a cabinet inlet wire port and a cabinet outlet wire port are formed in the low-voltage cabinet body 1;

the existing low-voltage cabinet is at least provided with two groups of cabinet inlet wire ports and cabinet outlet wire ports, external connecting wires are led into the cabinet body, and the design has the disadvantage that the cabinet outlet wire ports are not connected with the cabinet inlet wire ports; the excessive ports can affect the sealing performance of the low-voltage cabinet body 1, so that sulfur hexafluoride gas leakage and external air entering are caused, the insulation effect in the cabinet body is reduced, and the excessive external connection wire interfaces are troublesome in wiring and are easy to cause wrong connection;

therefore, in the embodiment, only two wiring through grooves 10 serving as the cabinet inlet wire port and the cabinet outlet wire port are formed, so that the formed ports are reduced;

specifically, the device also comprises a wiring busbar 4; one end of the wiring busbar 4 extends into the low-voltage cabinet body 1 through the wiring through groove 10 and is used for connecting the electric wires inside the low-voltage cabinet body 1, and if the electric wires are more, one end of the wiring busbar 4 inside the low-voltage cabinet body 1 can be connected with a deconcentrator; the other end of the wiring busbar 4 extends to the outside of the low-voltage cabinet body 1 through the wiring through groove 10 and is used for connecting a wiring wire outside the low-voltage cabinet body 1; an external wiring busbar 4 is fixed on the insulating sleeper;

specifically, considering that the external wiring busbar 4 is exposed in the external air and is prone to causing electric shock when being powered on, the wiring busbar 4 is exposed at the part outside the low-voltage cabinet body 1, and the surface of the wiring busbar is covered with an insulating material.

Specifically, an insulating sealant is filled at the joint of the wiring busbar 4 and the wiring through groove 10; the insulating sealant is used for plugging a gap at the joint of the wiring busbar 4 and the wiring through groove 10, leakage of sulfur hexafluoride gas and entrance of external air are prevented, and the insulating sealant is not conductive, so that the problem of electric shock is avoided.

Specifically, the sealing device comprises a sealing gasket I5 which is embedded in a surrounding manner at the edge of the inner side of the low-voltage cabinet body 1, and a sealing gasket II6 is embedded in a surrounding manner at the position of the low-voltage cabinet door 2 corresponding to the low-voltage cabinet body 1;

specifically, when the seal I5 is in contact with the seal II6, the seal I5 plays a role of double sealing;

specifically, the sealing gasket I5 is provided with a square groove 7, the sealing gasket II6 is provided with a sealing convex strip 8 wedged with the square groove 7, and when the sealing convex strip 8 is embedded into the square groove 7, a labyrinth-shaped sealing space is formed to play a role of double sealing;

the mouth font is installed relatively on the 7 inner walls of recess and is aerifyd strip 9, the inlet end of aerifing strip 9 is connected with the breather pipe, and the inflator is connected to the breather pipe, aerifys the clearance that leaves after expanding aerify strip 9 crowd sealed sand grip 8 and recess 7 and carve and close, plays triple sealed effect.

Further, in the prior art, when electrical appliances such as a transformer and a compensation capacitor in the cabinet operate with high power current, high heat can be emitted, so that the temperature inside the low-voltage cabinet body 1 is raised too high, and the normal operation of low-voltage equipment and components in the low-voltage cabinet body 1 is affected; therefore, the equipment provides the following two heat dissipation modes;

a first heat dissipation embodiment;

a hollow heat dissipation chamber is formed in the top of the inner side of the low-voltage cabinet body 1, heat conduction fins are installed in the heat dissipation chamber in a surrounding mode, and the other ends of the heat conduction fins extend to the outside of the low-voltage cabinet body 1;

specifically, the heat conduction fins are arranged on the part inside the low-voltage cabinet body 1 and connected with a cooling chamber through heat conduction pipes, the cooling chamber is filled with refrigerating fluid, and the cooling chamber is arranged on the outer side of the low-voltage cabinet body 1, provided with a liquid injection port and plugged through a sealing plug;

specifically, a plurality of room-entering through grooves are formed in the end face, facing the transformer and the compensation capacitor, of the heat dissipation room 1, and air inlet fans 12 or air outlet fans 13 are installed in the room-entering through grooves; the air inlet fan 12 or the air outlet fan 13 is connected with the wiring busbar 4 through a wire, and the wiring busbar 4 is electrically connected with an external power supply device;

specifically, considering that the heat generated by the transformer and the compensation capacitor is high in the low-voltage cabinet body 1, the air inlet fan 12 is installed above the equipment with high heat generation, such as the transformer and the compensation capacitor, and the air outlet fan 13 is installed above the electrical equipment with low heat generation;

specifically, the rotation directions of the inlet fan 12 and the outlet fan 13 are opposite, and the design is used for promoting the air flow in the low-pressure cabinet 1;

specifically, considering that the higher heating area is the position of a transformer and a compensating capacitor in the box, the equipment arranges the high-heating electric appliances such as the transformer and the compensating capacitor at the middle position of the low-voltage cabinet body 1, and arranges the low-heating electric appliances at the two sides of the low-voltage cabinet body 1, so that the air inlet fan 12 is designed at the middle of the heat dissipation chamber, and the air outlet fan 13 is arranged at the two sides of the heat dissipation chamber; when the temperature in the low-voltage cabinet body 1 rises, the gas is heated, the heated gas rises and enters the inside of the heat dissipation chamber through the air inlet fan 12, after the heat of the gas is absorbed by the heat conduction fins, part of the heat is transmitted to the outside of the low-voltage cabinet body 1 through the part of the heat conduction fins exposed out of the low-voltage cabinet body 1 for air cooling and heat dissipation, and the other part of the heat enters the cooling chamber filled with the refrigerant through the heat conduction pipes on the heat conduction fins for heat dissipation; the temperature of the radiated gas is reduced, the gas is cooled and reduced, and the cooled gas is discharged into the low-voltage cabinet body 1 through the air outlet fan 13, so that a circulating bad radiating air duct system is formed;

furthermore, because the transformer and the compensation capacitor are arranged in the middle of the low-voltage cabinet body 1, and the low-heat electric appliances are arranged on two sides of the low-voltage cabinet body 1, the cooled gas emitted by the air outlet fan 13 moves downwards and passes through the area where the low-heat electric appliances are located, and thus, the heat dissipation of the middle of the low-voltage cabinet body 1 is not facilitated;

therefore, a guide plate 14 is further arranged, one end of the guide plate 14 is installed on the outer side of the air outlet fan 13, and the other end of the guide plate 14 extends to the middle position of the low-voltage cabinet body 1; the cooled gas moves to the middle position of the low-voltage cabinet body 1 through the guide plate 14, and is used for cooling high-heat-generating electric appliances such as a transformer, a compensation capacitor and the like.

A second heat dissipation embodiment;

in the embodiment, an air outlet pipe is arranged, one end of the air outlet pipe is communicated with the low-voltage cabinet body 1, one end of the air outlet pipe is connected with a gas cooler, the gas cooler is connected with a circulating fan through a connecting pipe, and the circulating fan is connected with the gas injection machine through a circulating air outlet pipe;

the sulfur hexafluoride gas enters the low-voltage cabinet body 1 through the gas injection machine and then enters the gas cooler through the gas outlet pipe for cooling, in order to enhance the flowability of the gas, the cooled gas enters the circulating fan through the connecting pipe, enters the gas injection machine through the circulating fan, enters the low-voltage cabinet body 1 through the gas injection machine, and is forcedly circulated and cooled, so that the flowability of the sulfur hexafluoride gas in the cabinet is accelerated, the heat generated by high-heating electric appliances in the low-voltage cabinet body 1 can be rapidly taken away, the heated sulfur hexafluoride gas circularly enters the low-voltage cabinet body 1 after being weakened through the gas cooler, and the temperature inside the low-voltage cabinet body 1 is continuously reduced.

The working principle is as follows:

the connecting part of the low-voltage cabinet door 2 and the low-voltage cabinet body 1 is sealed through a sealing device, sulfur hexafluoride gas is injected into the low-voltage cabinet body 1, so that the low-voltage cabinet body 1 is in an insulating environment, the external air is prevented from entering and the sulfur hexafluoride gas is prevented from leaking, and the short circuit of the electric appliance in the low-voltage cabinet body 1 is prevented;

outside electrical connection wire is arranged 4 through the wiring and is entered into the internal portion of low-voltage cabinet 1 to through the internal cast generating line 4 of low-voltage cabinet 1, the electrical equipment of the internal portion of low-voltage cabinet is connected to the electricity, for the needs through the bolt assemble the generating line that forms compare, resistance is little, the insecure problem of crimping department can not appear moreover, behind the generating line circular telegram, self electric conductivity is reliable.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims (5)

1. A novel inflatable low-voltage cabinet is characterized in that; comprises a low-pressure cabinet body (1) filled with sulfur hexafluoride gas; a sealing device is arranged at the joint of the low-voltage cabinet door (2) and the low-voltage cabinet body (1), and is used for preventing sulfur hexafluoride gas in the low-voltage cabinet body (1) from leaking; a bus (3) used for connecting an electric appliance in the low-voltage cabinet body (1) is integrally cast and formed, and the joint of the bus (3) and the electric appliance is welded and fixed.

2. The novel inflatable low-pressure cabinet as claimed in claim 1, wherein; the low-voltage cabinet body (1) is only provided with two wiring through grooves (10) which are used as an inlet cabinet wire port and an outlet cabinet wire port.

3. A novel inflatable low-pressure cabinet as claimed in claim 2, wherein; the device also comprises a wiring busbar (4); one end of the wiring busbar (4) extends to the interior of the low-voltage cabinet body (1) through the wiring through groove (10), and the other end of the wiring busbar extends to the exterior of the low-voltage cabinet body (1) through the wiring through groove (10).

4. A novel inflatable low-pressure cabinet as claimed in claim 3, wherein; the wiring busbar (4) is exposed out of the low-voltage cabinet body (1), and the surface of the wiring busbar is covered with an insulating material.

5. The novel inflatable low-pressure cabinet as claimed in claim 4, wherein; and insulating sealant is filled at the joint of the wiring busbar (4) and the wiring through groove (10).

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