CN219498648U

CN219498648U - Special high-capacity explosion-proof pressure relief box-type substation for nuclear power station

Info

Publication number: CN219498648U
Application number: CN202320617878.4U
Authority: CN
Inventors: 杨雄; 徐策; 梁钜锋; 邓文凯
Original assignee: Hainan Jinpan Intelligent Technology Co ltd; Guilin Juntaifu Electric Co ltd
Current assignee: Hainan Jinpan Intelligent Technology Co ltd; Guilin Juntaifu Electric Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-08-08
Anticipated expiration: 2033-03-27

Abstract

The utility model relates to the technical field of transformer substations. The large-capacity explosion-proof pressure relief box-type substation special for the nuclear power station comprises a box body, wherein an installation seat is arranged at the bottom of the inner side of the box body, a transformer is arranged on the installation seat, a partition plate is arranged on the inner side of the box body, and two switch cabinets which are arranged side by side are arranged in the box body; the top of the inner side of the box body is provided with an arcing pressure relief channel above the switch cabinet, the arcing pressure relief channel comprises a top pressure relief channel arranged on the top of the switch cabinet, a directional pressure relief channel arranged at the outlet of the top pressure relief channel and an outdoor pressure relief channel arranged on the top of a box wall on one side of the box body, and the top pressure relief channel is arranged on the upper side of the corresponding position of a pressure relief port of the switch cabinet; and an explosion-proof membrane is arranged at the outlet end of the outdoor pressure relief channel. The utility model has good safety performance, can prevent the top of the transformer substation box body from being damaged, and can also avoid the harm of toxic gas to operators.

Description

Special high-capacity explosion-proof pressure relief box-type substation for nuclear power station

Technical Field

The utility model relates to the technical field of substations, in particular to a high-capacity explosion-proof pressure relief box-type substation special for a nuclear power station.

Background

The box-type transformer substation (simply called box transformer) is a novel power supply and distribution device, the box body of the box-type transformer substation is generally designed by adopting an integral structure, and the inside of the box-type transformer substation comprises a high-voltage unit, a transformer and a low-voltage unit; the high-voltage unit is a high-voltage switch cabinet combination of various schemes; the transformer adopts a low-loss, low-temperature-rise, low-noise, fully-sealed maintenance-free oil immersed or epoxy resin insulation dry type transformer; the low-voltage unit is a low-voltage switch combination of various schemes. The box-type transformer substation has the characteristics of small volume, compact structure, simple installation, rapid power supply and the like, gradually replaces the civil transformer substation, and is widely applied to mines, factory enterprises, oil-gas fields and residential communities. However, the present utility model is not particularly suitable for a tank transformer installed in a nuclear power plant. At present, the market of China nuclear power is vigorous, the conventional box transformer is insufficient to meet the market demand, and the research and development and production of the large-capacity box transformer applied to the nuclear power station have very important significance for expanding the market share. But the high-capacity box becomes outdoor electrical equipment generally, has the insolation to increase equipment operating temperature factor, and the high-capacity box becomes the compact design of integration in addition, and after the switch cabinet gas box of transformer substation inside and cable chamber take place inside arcing trouble, the energy and the inflation gas of electric arc, because box-type substation inner space is narrow, can discharge to the box top through the pressure relief mouth of cabinet top, can have to cause certain destructiveness to the box top to bring certain damage to box top structure, bring hidden danger for operating personnel's personal safety. Because no arcing pressure relief channel is arranged in the box body, once the transformer substation has internal faults, the pressure which is rapidly increased in the transformer substation cannot be released, and the accident is easily enlarged; in addition, the gas generated by the arcing is likely to have partial toxic gas, when an operator opens the transformer substation box body, the toxic gas can bring great harm to the operator, the personal safety of the operator is seriously influenced, and the defect brings great adverse factors to the discharging work of the gas generated by the arcing. In addition, the heat generated by components in the existing box-type transformer substation cannot be timely dissipated, so that the temperature of the inner space of the box-type transformer substation is too high, faults are easy to cause, and the safe operation of a power distribution system of a nuclear power station is affected.

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the background art, and provides the special high-capacity explosion-proof pressure relief box-type substation for the nuclear power station, which has reasonable structure and good safety performance, can prevent the top of the box body of the substation from being damaged, and can also avoid the harm of toxic gas to operators.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the large-capacity explosion-proof pressure relief box-type substation special for the nuclear power station comprises a box body, wherein an installation seat is arranged at the bottom of the inner side of the box body, a transformer is arranged on the installation seat, a partition plate is arranged on the inner side of the box body, and the partition plate is positioned on one side of the transformer; two switch cabinets which are arranged side by side are arranged in the box body, and the switch cabinets are positioned on one side of the partition board, which is far away from the transformer; the top of the inner side of the box body is provided with an arcing pressure relief channel above the switch cabinet, the arcing pressure relief channel comprises a top pressure relief channel arranged on the top of the switch cabinet, a directional pressure relief channel arranged at the outlet of the top pressure relief channel and an outdoor pressure relief channel arranged on the top of a box wall on one side of the box body, and the top pressure relief channel is arranged on the upper side of the corresponding position of a pressure relief port of the switch cabinet; the inlet end of the outdoor pressure relief channel is in butt joint with the outlet end of the directional pressure relief channel; and an explosion-proof membrane is arranged at the outlet end of the outdoor pressure relief channel.

As a further improvement of the utility model, the upper part of the inner side of the box body is provided with an air conditioner, and the air outlet of the air conditioner is arranged downwards; a centrifugal fan is arranged below the mounting seat, and an air outlet of the centrifugal fan faces the transformer; a plurality of ventilation openings are formed in the side face or the top face of the box body; thus being beneficial to ventilation and heat dissipation of the box body and ensuring normal and stable operation of equipment in the box body.

As a further improvement of the utility model, the arcing pressure relief channel is surrounded by a top plate, a bottom plate, a front baffle plate, a rear shielding plate, a left side plate and a right side plate, and an opening corresponding to a pressure relief opening of the switch cabinet is arranged at the lower part of the top pressure relief channel.

As a further improvement of the utility model, one side of the arcing pressure relief channel provided with the front baffle is attached to the rear end of the gas tank of the switch cabinet.

As a further improvement of the utility model, the two opposite sides of the box body are provided with access doors; the bottom of the box body is provided with a base.

As a further improvement of the utility model, the clapboard is provided with copper bar wire passing holes; the cables connected with the wire inlet end and the wire outlet end of the switch equipment of the switch cabinet pass through the copper bar wire through hole and are connected with the transformer.

As a further improvement of the utility model, the top of the box body is provided with an inclined top cover; the wall of the box body adopts a groove type bulkhead structure.

By adopting the technical scheme, the special high-capacity explosion-proof pressure relief box-type transformer substation for the nuclear power station has the following beneficial effects:

on the basis of keeping a miniaturized preassembled transformer substation to realize standardized design of the whole transformer substation and factory processing, an arcing pressure relief channel is additionally arranged above the switch cabinet on the top of the inner side of the box body, when an arcing fault occurs in the switch cabinet, air pressure in the switch cabinet enters the arcing pressure relief channel from a pressure relief port and is discharged out of the box body, so that the directional flow of high-pressure high-temperature air generated by the switch cabinet in the arcing fault is realized, the influence on the switch cabinet body and surrounding switch equipment is reduced, the effective pressure relief is conveniently carried out when the internal arcing fault occurs in the switch cabinet of the transformer substation, and the operation safety and personal safety of the whole equipment of the transformer substation are effectively ensured; the switch cabinet can fully release pressure and electric arc when arcing faults, and meanwhile, the direction of pressure release is the direction of the ceiling at the top of the box body, so that the damage to people is avoided, and the accident expansion is avoided.

According to the high-capacity explosion-proof pressure relief box-type substation special for the nuclear power station, the centrifugal fan and the air conditioner are arranged, so that the heat dissipation in the box body can be accelerated through the centrifugal fan, and if the temperature is too high, the centrifugal fan and the air conditioner can be simultaneously started for cooling and heat dissipation.

The transformer substation is particularly suitable for being installed in a nuclear power station, has the characteristics of convenience in installation and good ventilation and heat dissipation, and meanwhile, the arcing pressure relief channel ensures the arcing safety and ensures the use safety.

Drawings

Fig. 1 is a schematic diagram of the external structure of a special high-capacity explosion-proof pressure relief box-type substation for a nuclear power station;

fig. 2 is a schematic structural diagram of a large-capacity explosion-proof pressure relief box-type substation special for a nuclear power station when an access door is opened;

FIG. 3 is a plan view of the interior of the case according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an arcing pressure relief channel of the present utility model;

FIG. 5 is a schematic diagram of the structure of two switch cabinets of the present utility model;

wherein, the reference numerals in the drawings are as follows: 1. a case; 2. a mounting base; 3. a transformer; 4. a partition plate; 5. a switch cabinet; 6. an arcing pressure relief channel; 601. a top pressure relief channel; 602. a directional pressure relief channel; 603. an outdoor pressure relief channel; 7. a pressure release port; 8. an explosion-proof membrane; 9. air-conditioning; 10. a centrifugal fan; 11. an access door; 12. a base; 13. copper bar wire passing holes; 14. and an inclined top cover.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-5, a special high-capacity explosion-proof pressure relief box-type substation for a nuclear power station comprises a box body 1, wherein an installation seat 2 is arranged at the bottom of the inner side of the box body 1, a transformer 3 is arranged on the installation seat 2, a partition board 4 is arranged on the inner side of the box body 1, and the partition board 4 is positioned on one side of the transformer 3; two switch cabinets 5 arranged side by side are arranged in the box body 1, and the switch cabinets 5 are positioned on one side of the partition board 4 far away from the transformer 3; the top of the inner side of the box body 1 is positioned above the switch cabinet 5 and is provided with an arcing pressure relief channel 6, the arcing pressure relief channel 6 comprises a top pressure relief channel 601 arranged on the top of the switch cabinet 5, a directional pressure relief channel 602 arranged at the outlet of the top pressure relief channel 601 and an outdoor pressure relief channel 603 arranged on the top of a box wall on one side of the box body 1, and the top pressure relief channel 601 is arranged on the upper side of the corresponding position of a pressure relief port 7 of the switch cabinet 5; the pressure release port 7 is movably provided with a pressure release cover plate through a hinge, when high-pressure arc gas is generated in the switch cabinet 5, the gas is discharged out of the switch cabinet 5 from the pressure release cover plate at the upper part of the switch cabinet 5 and enters the top pressure release channel 601, and is discharged after sequentially passing through the directional pressure release channel 602 and the outdoor pressure release channel 603, so that the internal pressure of the switch cabinet 5 can be reduced, the switch cabinet 5 is protected from being damaged, and the inlet end of the outdoor pressure release channel 603 is butted with the outlet end of the directional pressure release channel 602; an explosion-proof membrane 8 is arranged at the outlet end of the outdoor pressure relief channel 603. The size of the explosion-proof membrane 8 is matched with the size of the outlet end of the outdoor pressure relief channel 603, the explosion-proof membrane 8 is mounted on the outlet end of the outdoor pressure relief channel 603 by bolts in a detachable mounting mode, and the explosion-proof membrane can be replaced for a plurality of times after being blasted, so that the explosion-proof membrane is safe to use.

Due to the adoption of the technical scheme, the utility model only carries out the optimal design on the cabinet top structure on the premise of not changing the gas tank and cabinet body structure of the switch cabinet 5 so as to realize an arcing pressure relief channel 6, and then the arcing pressure relief channel is connected with the prefabricated cabinet body 1, when the arcing fault occurs in the switch cabinet 5, the internal gas pressure of the switch cabinet 5 enters the arcing pressure relief channel 6 from the pressure relief port 7 and is discharged out of the cabinet body 1, so that the directional flow of high-pressure high-temperature gas generated by the switch cabinet 5 in the arcing fault is realized, the top of the substation cabinet body 1 can be prevented from being damaged, and the harm to operators caused by toxic gas can be avoided.

An air conditioner 9 is arranged at the upper part of the inner side of the box body 1, and an air outlet of the air conditioner 9 is arranged downwards; it is to be understood that the air conditioner 9 internal unit is arranged at the upper part of the inner side of the box body 1, and the air conditioner 9 external unit is arranged outside the box body 1; a centrifugal fan 10 is arranged below the mounting seat 2, and an air outlet of the centrifugal fan 10 faces the transformer 3; the inside of the box body 1 is also provided with a centrifugal fan 10 with an air outlet facing the switch cabinet 5, and a plurality of ventilation openings are arranged on the side surface or the top surface of the box body 1. The number of the air conditioners 9 and the centrifugal fans 10 is designed according to actual needs, and in addition, a distribution box and a temperature control box are arranged in the box body 1, and the box body is also provided with the existing systems such as a direct current screen and the like; according to the utility model, natural ventilation and cooling can be realized when the load of the transformer 3 is not high, and the centrifugal fan 10 and the air conditioner 9 can be simultaneously started to cool and dissipate heat when the load of the transformer 3 is high, so that the problems of high-current heating and outdoor anti-insolation of a large-capacity box-type transformer substation are effectively solved, and serious equipment faults caused by further temperature rise are avoided.

As a further improvement of the utility model, the arcing pressure relief channel 6 is surrounded by a top plate, a bottom plate, a front baffle plate, a rear shielding plate, a left side plate and a right side plate, and the lower part of the top pressure relief channel 601 is provided with openings corresponding to the pressure relief openings 7 of the two switch cabinets 5. The arcing channel is arranged above the switch cabinet 5 and is effectively connected with the pressure release channels of the functional compartments, and the pressure release openings are arranged outside the box body 1 so as to ensure personal safety under the condition of electrical faults.

As a further improvement of the utility model, one side of the arcing pressure relief channel 6 provided with a front baffle is attached to the rear end of the gas tank of the switch cabinet 5.

As a further improvement of the utility model, the two opposite sides of the box body 1 are provided with access doors 11, and the access doors 11 are provided with handles; the bottom of the box body 1 is provided with a base 12.

As a further improvement of the utility model, the clapboard 4 is provided with copper bar wire passing holes 13; the cables connected with the wire inlet end and the wire outlet end of the switch equipment of the switch cabinet 5 pass through the copper bar wire through hole 13 and are connected with the transformer 3, so that the optimization of the wiring path is facilitated. In this embodiment, the switch cabinet includes a switch cabinet of 35kV and a switch cabinet of 10kV, and the voltage of 35kV is converted into the voltage of 10kV by the transformer 3.

In one embodiment of the utility model, the transformer 3 weighs up to 2.87 meters and is 24.5 tons, the overall height of the box transformer is 3.5 meters, the top of the box body 1 is provided with an inclined top cover 14, and the inclined top cover 14 is designed to be favorable for water dispersion; the inclined top cover 14 of the utility model can be composed of a color steel tile top cover and a color steel composite board top cover, wherein the color steel composite board top cover is paved on the lower layer to play a role in heat insulation, and the color steel tile top cover is paved on the color steel composite board top cover to play a role in water resistance; the wall of the box body 1 adopts a groove type bulkhead structure. The bending strength of the box body 1 can be enhanced, so that the surface of the box body 1 is not easy to deform when being extruded or impacted; the outer shell of the box body 1 is made of galvanized steel plates or stainless steel plates, and a radiation heat dissipation cooling paint layer is arranged on the outer surface of each galvanized steel plate or each stainless steel plate.

According to the utility model, the arcing pressure relief channel 6 is additionally arranged above the switch cabinet 5 at the top of the inner side of the box body 1, when the arcing fault occurs in the switch cabinet 5, the internal air pressure of the switch cabinet 5 enters the arcing pressure relief channel 6 from the pressure relief port 7 and is discharged out of the box body 1, so that the directional flow of high-pressure high-temperature air generated by the switch cabinet 5 in the arcing fault is realized, the influence on the switch cabinet 5 and surrounding switch equipment is reduced, the effective pressure relief is conveniently carried out when the internal arcing fault occurs in the switch cabinet 5 of the transformer substation, and the operation safety and personal safety of the whole equipment of the transformer substation are effectively ensured; the switch cabinet 5 can fully release pressure and electric arc when arcing faults, and meanwhile, the direction of pressure release is the ceiling direction at the top of the box body 1, so that the damage to people is avoided, and the accident expansion is avoided.

The foregoing description is directed to the preferred embodiments of the present utility model, but the embodiments are not intended to limit the scope of the utility model, and all equivalent changes or modifications made under the technical spirit of the present utility model should be construed to fall within the scope of the present utility model.

Claims

1. The utility model provides a special large capacity explosion-proof pressure release box-type substation of nuclear power station, includes box (1), its characterized in that: the transformer is characterized in that an installation seat (2) is arranged at the bottom of the inner side of the box body (1), a transformer (3) is arranged on the installation seat (2), a partition board (4) is arranged on the inner side of the box body (1), and the partition board (4) is positioned on one side of the transformer (3); two switch cabinets (5) which are arranged side by side are arranged in the box body (1), and the switch cabinets (5) are positioned on one side, far away from the transformer (3), of the partition board (4); the top of the inner side of the box body (1) is positioned above the switch cabinet (5) and provided with an arcing pressure relief channel (6), the arcing pressure relief channel (6) comprises a top pressure relief channel (601) arranged on the top of the switch cabinet (5), a directional pressure relief channel (602) arranged at the outlet of the top pressure relief channel (601) and an outdoor pressure relief channel (603) arranged on the top of one side wall of the box body (1), and the top pressure relief channel (601) is arranged on the upper side of the corresponding position of a pressure relief port (7) of the switch cabinet (5); the inlet end of the outdoor pressure relief channel (603) is in butt joint with the outlet end of the directional pressure relief channel (602); an explosion-proof membrane (8) is arranged at the outlet end of the outdoor pressure relief channel (603).

2. The high-capacity explosion-proof pressure relief box-type substation special for nuclear power plants as claimed in claim 1, wherein: an air conditioner (9) is arranged at the upper part of the inner side of the box body (1), and an air outlet of the air conditioner (9) is arranged downwards; a centrifugal fan (10) is arranged below the mounting seat (2), and an air outlet of the centrifugal fan (10) faces the transformer (3); the side surface or the top surface of the box body (1) is provided with a plurality of ventilation openings.

3. The high-capacity explosion-proof pressure relief box-type substation special for nuclear power plants as claimed in claim 1, wherein: the arcing pressure relief channel (6) is formed by enclosing a top plate, a bottom plate, a front baffle plate, a rear shielding plate, a left side plate and a right side plate, and an opening corresponding to a pressure relief opening (7) of the switch cabinet (5) is arranged at the lower part of the top pressure relief channel (601).

4. A high capacity explosion proof pressure relief box substation dedicated for nuclear power plants as defined in claim 3, wherein: one side of the arcing pressure relief channel (6) provided with a front baffle is attached to the rear end of the gas tank of the switch cabinet (5).

5. The high-capacity explosion-proof pressure relief box-type substation special for nuclear power plants as claimed in claim 1, wherein: access doors (11) are arranged on two opposite side surfaces of the box body (1); the bottom of the box body (1) is provided with a base (12).

6. The high-capacity explosion-proof pressure relief box-type substation special for nuclear power plants as claimed in claim 1, wherein: copper bar wire passing holes (13) are formed in the partition plates (4); a cable connected with the wire inlet end and the wire outlet end of the switch equipment of the switch cabinet (5) passes through the copper bar wire through hole (13) and is connected with the transformer (3).

7. The high-capacity explosion-proof pressure relief box-type substation special for nuclear power plants as claimed in claim 1, wherein: an inclined top cover (14) is arranged at the top of the box body (1); the tank wall of the tank body (1) adopts a groove type bulkhead structure.