CN116316153A - Marine medium-voltage power distribution cabinet - Google Patents

Abstract

The invention provides a marine medium voltage power distribution cabinet, comprising: the device comprises a bottom frame, a top frame, a left side plate, a right side plate, a front door, a rear door and an installation space formed by surrounding the bottom frame, the top frame, the left side plate, the right side plate, the front door and the rear door, wherein the installation space comprises a bus chamber, a cable chamber, a switch chamber, an instrument chamber and a small bus chamber; the tops of the bus chamber, the cable chamber and the switch chamber are respectively provided with a bus chamber pressure relief cover, a cable chamber pressure relief cover and a switch chamber pressure relief cover; the bus room relief cover the cable room relief cover the switch room relief cover forms first pressure release passageway with headspace, compares land medium voltage distribution switch cabinet, the height of first pressure release passageway with little bus room flushes, has both improved marine medium voltage distribution cabinet's security, does not increase the height and the degree of depth of switch cabinet again, and economic input is little, and the effect is obvious.

Description

Marine medium-voltage power distribution cabinet

Technical Field

The embodiment of the invention relates to the technical field of electrical equipment, in particular to a marine medium-voltage power distribution cabinet.

Background

The existing ship medium-voltage distribution device has a small application range, and the current ship distribution is generally low-voltage distribution and is generally under 1kV alternating current.

In recent years, with the popularization of full electrification of ships and the improvement of the capacity of electric loads, particularly the rising of special ships with large capacity electric loads, the voltage level of ship power distribution is increased. With the accelerated development of medium-voltage distribution on ships, the alternating current is required to be 3.6-12 kV.

The current medium voltage power distribution device of the ship is mostly directly applied from a mature land medium voltage power distribution switch cabinet, is of an armored and draw-out structure, and is of a type that metal plates are bent and spliced and a main switch can be pushed and pulled out. The marine medium voltage distribution equipment also needs to face adaptive upgrades to cope with a large number of popular applications in marine environments.

The design of the land medium voltage power distribution switch cabinet is designed aiming at land scenes, however, the space on the ship is limited, the external dimension of the power distribution device needs to be controlled in a smaller range as far as possible under the condition of meeting the use requirement as far as possible, and the safety requirement on the power distribution device is more severe because the space on the ship is smaller, if the land medium voltage power distribution switch cabinet is directly used, the functions of the land medium voltage power distribution device are completely realized, and the external dimension and the safety of the power distribution device are difficult to balance.

Referring now to fig. 1 and 2, fig. 1 is a schematic structural view of a land-based flat top power distribution cabinet in the prior art, and fig. 2 is a schematic structural view of a land-based high-low top power distribution cabinet in the prior art. Fig. 1 is an existing land flat top type power distribution cabinet with overall height of 2360mm and depth of 1500mm, and fig. 2 is an existing land high and low top type power distribution cabinet with overall height of 2360mm and depth of 1500mm. The land-based power distribution cabinets in fig. 1 and 2 include a land-based power distribution cabinet bus bar chamber 1011, a land-based power distribution cabinet cable chamber 1012, a land-based power distribution cabinet small bus bar chamber 1013, a land-based power distribution cabinet instrument chamber 1014, a land-based power distribution cabinet switch chamber 1015, an oval insulating sleeve 1016, and a cable chamber upward gas discharge passage 1017, respectively. After internal faults are burnt, the land power distribution cabinet only needs to discharge generated impact waves and gas out of the top of the cabinet, and operators are not injured. However, the marine power distribution cabinet is required to be provided with a pressure relief channel for leading generated shock waves and gas out of the cabin, and due to the narrow space of the ship, even a small amount of substances such as high-temperature gas and molten metal, which are impacted by the marine power distribution cabinet, can easily hurt operators once faults such as arcing occur. In addition, land-based power distribution cabinets are fixedly mounted on the ground, and when the ship is used, the service life of the device is inevitably affected by directly using the land-based power distribution cabinets due to the fact that vibration is aggravated and shaking is accompanied.

Therefore, there is a need to provide a marine medium voltage power distribution cabinet to effectively solve the above problems.

Disclosure of Invention

The invention provides a marine medium voltage power distribution cabinet, which improves the safety of the marine medium voltage power distribution cabinet by forming a first pressure relief channel and a second pressure relief channel.

The embodiment of the invention provides a marine medium-voltage power distribution cabinet, which comprises a bottom frame, a top frame, a left side plate, a right side plate, a front door, a rear door and an installation space formed by surrounding the bottom frame, wherein the installation space comprises a bus chamber, a cable chamber, a switch chamber, an instrument chamber and a small bus chamber;

the tops of the bus chamber, the cable chamber and the switch chamber are respectively provided with a bus chamber pressure relief cover, a cable chamber pressure relief cover and a switch chamber pressure relief cover;

the bus chamber pressure relief cover, the cable chamber pressure relief cover, the switch chamber pressure relief cover and the top space form a first pressure relief channel;

the height of the first pressure relief channel is flush with the busbar chamber.

Preferably, the bus room large bent plate, the rear door, the left side plate, the right side plate, the bottom frame and the cable room pressure release cover are surrounded to form a second pressure release channel.

Preferably, the left side plate comprises a left front side plate and a left rear side plate, the right side plate comprises a right front side plate and a right rear side plate, the front door comprises a front instrument door, a front middle door and a front lower door, and the rear door comprises a rear upper door and a rear lower door;

the front middle door is provided with a front middle door handrail, and the rear lower door is provided with a rear lower door handrail;

the front instrument door, the front middle door and the front lower door are sequentially arranged on the door hinges of the left front side plate from top to bottom.

Preferably, the front middle door is provided with a front middle door explosion-proof plate, the rear upper door is provided with a rear upper door explosion-proof plate, and the rear lower door is provided with a rear lower door explosion-proof plate;

the left front side plate and the right front side plate are provided with a first transverse group of studs, and the front middle door explosion-proof plate is hung on the first group of studs through corresponding screws by using L-shaped mounting holes;

the left rear side plate and the right rear side plate are provided with a second group of transverse studs and a third group of transverse studs, and the rear upper door explosion-proof plate and the rear lower door explosion-proof plate are hung on the second group of studs and the third group of studs through corresponding screws by using L-shaped mounting holes.

Preferably, a plurality of cushion pads are arranged at the bottom of the bottom frame, and the cushion pads are made of rubber supporting materials or spring cushioning supporting materials.

Preferably, the power distribution cabinet further comprises two L-shaped upright posts, wherein a first middle partition plate, a contact box mounting plate and a second middle partition plate are sequentially arranged on the two L-shaped upright posts from top to bottom, and the first middle partition plate, the contact box mounting plate and the second middle partition plate divide the power distribution cabinet into a front area and a rear area;

the front region includes the bus bar compartment, the cable compartment, the first pressure relief channel, and the second pressure relief channel;

the rear region includes the busbar compartment, the meter compartment, and the switch compartment.

Preferably, the device further comprises a first guide rail and a second guide rail, wherein the first guide rail and the second guide rail are symmetrically and fixedly arranged on the left front side plate and the right front side plate respectively, and a switch is inserted between the first guide rail and the second guide rail;

the first guide rail and the second guide rail are provided at lower portions thereof with a withdrawable partition plate for closing the front center door and the front lower door and supporting the left front side plate and the right front side plate.

Preferably, the switch chamber is formed by the extractable partition, the contact box mounting plate, the top frame, the instrument room bent plate, the front center door and the front center door explosion-proof plate.

Preferably, the instrument room is formed by enclosing an instrument room bent plate, an instrument room top cover, the front instrument door, the left side plate and the right side plate.

Preferably, the small bus bar chamber is formed by surrounding an instrument room top cover, a small bus bar chamber cover plate, an eyebrow, the left side plate and the right side plate, and the small bus bar chamber is positioned at the upper part of the instrument room.

Preferably, the bus bar chamber is formed by surrounding the bus bar chamber large bent plate, the top frame, the first middle partition plate, the left side plate and the right side plate, and the bus bar chamber is positioned at the upper rear part of the switch chamber;

the bus room comprises a plurality of circular insulating sleeves, and the main bus bar in the horizontal direction passes through the circular insulating sleeves;

the bus chamber is in circuit connection with the switch chamber through a branch bus, the branch bus is installed on the contact box, and the contact box is installed on the contact box installation plate.

Preferably, the cable chamber is formed by surrounding the rear upper door, the rear lower door, the bottom frame, the second middle partition plate, the bus chamber large bending plate, the left side plate and the right side plate.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the marine medium-voltage power distribution cabinet comprises a bottom frame, a top frame, a left side plate, a right side plate, a front door, a rear door and an installation space formed by surrounding the bottom frame, wherein the installation space comprises a bus chamber, a cable chamber, a switch chamber, an instrument chamber and a small bus chamber; the tops of the bus chamber, the cable chamber and the switch chamber are respectively provided with a bus chamber pressure relief cover, a cable chamber pressure relief cover and a switch chamber pressure relief cover; the bus chamber pressure relief cover, the cable chamber pressure relief cover, the switch chamber pressure relief cover and the top space form a first pressure relief channel, compared with a land medium-voltage power distribution switch cabinet, the height of the first pressure relief channel is flush with the small bus chamber, so that the safety of the marine medium-voltage power distribution cabinet is improved, the height and depth of the power distribution cabinet are not increased, the economic investment is small, and the effect is obvious;

further, the bus room large bending plate, the rear door, the left side plate, the right side plate, the bottom frame and the cable room pressure release cover are surrounded to form a second pressure release channel, and the safety of the cable room is improved by forming the second pressure release channel;

further, the front middle door is provided with a front middle door handrail, and the rear lower door is provided with a rear lower door handrail, so that an operator can conveniently patrol and simply maintain the equipment when the ship body shakes;

further, the front middle door is provided with a front middle door explosion-proof plate, the rear upper door is provided with a rear upper door explosion-proof plate, and the rear lower door is provided with a rear lower door explosion-proof plate, so that pressure gas does not leak or overflows in a very small amount to the extent that personnel injury cannot be achieved;

further, a plurality of buffer pads are arranged at the bottom of the bottom frame, and the buffer pads are made of rubber supporting materials or spring buffer supporting materials, so that the influence of ship vibration on a power distribution device is reduced;

further, the land medium voltage power distribution switch cabinet is relatively large in size of horizontal buses and corresponding oval insulating bushings for bearing total current of the power distribution system due to the fact that total capacity of the power distribution system is considered, the cross section area of the horizontal buses is large or a plurality of horizontal buses are used in parallel, and the total capacity of ship power distribution is far smaller than that of land power distribution, so that the depth of a bus chamber can be compressed by using the circular insulating bushings with smaller size and the horizontal buses with smaller cross section, a second pressure release channel of a cable chamber is enlarged, gas and pressure after the cable chamber is smoothly and rapidly discharged, and therefore the power distribution device has better internal arcing fault tolerance capability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the prior art, a brief description of the drawings is provided below, wherein it is apparent that the drawings in the following description are some, but not all, embodiments of the present invention. Other figures may be derived from these figures without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural view of a land-based flat-top power distribution cabinet in the prior art;

fig. 2 is a schematic structural view of a land-based high-low top power distribution cabinet in the prior art;

fig. 3 is one of exploded schematic views of a front view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 4 is a second exploded schematic view of a front view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 5 is a three-dimensional exploded schematic view of a front view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 6 is one of exploded schematic views of another front view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 7 is a second exploded view of another front view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 8 is one of exploded schematic views of a side view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention;

fig. 9 is a second exploded view of a side view of a marine medium voltage power distribution cabinet according to an embodiment of the present invention.

Reference numerals illustrate:

1011-land-used power distribution cabinet bus-bar chamber 1012-land-used power distribution cabinet cable chamber 1013-land-used power distribution cabinet small bus-bar chamber

1014-land-used power distribution cabinet instrument room 1015-land-used power distribution cabinet switch room 1016-elliptical insulating sleeve

1017-Cable Chamber upward gas exhaust channel 1-bus Chamber 2-Cable Chamber

3-busbar chamber 4-instrument chamber 5-switch chamber

6-bottom frame 7-top frame 8-first pressure relief channel

9-second pressure relief channel 11-left front side plate 12-left rear side plate

21-right front side plate 22-right rear side plate 23-sleeve mounting plate

231-insulating sleeve 232-insulator 24-horizontal bus

25-bus room large bent plate 31-front instrument door 311-instrument room bent plate

32-front center door 321-front center door armrest 322-front center door explosion-proof panel

33-front lower door 34-instrument room top cover 35-small bus room cover plate

36-eyebrow 37-door hinge 38-switch

41-rear upper door 411-rear upper door explosion-proof plate 42-rear lower door

421-rear lower door explosion-proof plate 422-rear lower door supporting plate 43-rear door

44-cable connection 511-cable chamber pressure relief cap 512-bus chamber pressure relief cap

513-switch chamber relief cover 61-buffer pad 62-grounded copper bar

71-first intermediate partition 72-contact box mounting plate 73-contact box

74-L-shaped upright 75-second intermediate partition 81-extractable partition

821-first rail 83-shutter mechanism 84-L-shaped mounting aperture

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Based on the problems existing in the prior art, the embodiment of the invention provides a marine medium voltage power distribution cabinet, and the safety of the marine medium voltage power distribution cabinet is improved by forming a first pressure relief channel and a second pressure relief channel.

Referring now to fig. 3 to 9, an embodiment of the present invention provides a marine medium voltage power distribution cabinet, comprising a bottom frame 6, a top frame 7, left side plates 11 and 12, right side plates 21 and 22, front doors 31 and 32 and 33, rear doors 41 and 42, and an installation space formed by surrounding the same, wherein the installation space comprises a bus bar chamber 1, a cable chamber 2, a switch chamber 5, an instrument chamber 4 and a small bus bar chamber 3;

bus-bar chamber pressure relief cover 512, cable-chamber pressure relief cover 511 and switch-chamber pressure relief cover 513 are respectively arranged at the tops of bus-bar chamber 1, cable-chamber 2 and switch-chamber;

the bus-bar chamber pressure relief cover 512, the cable-chamber pressure relief cover 511, the switch-chamber pressure relief cover 513 and the top space form a first pressure relief channel 8;

the bus-compartment large bent plate 25, the rear doors 41 and 42, the left side plates 11 and 12, the right side plates 21 and 22, the bottom frame 6, and the cable-compartment pressure release cover 511 are surrounded to form a second pressure release passage 9.

In some embodiments, the left side panels 11 and 12 include a left front side panel 11 and a left rear side panel 12, the right side panels 21 and 22 include a right front side panel 21 and a right rear side panel 22, the front doors 31 and 32 and 33 include a front instrument door 31, a front middle door 32 and a front lower door 33, and the rear doors 41 and 42 include a rear upper door 41 and a rear lower door 42. The front side plate 11, the left rear side plate 12, the right front side plate 21 and the right rear side plate 22 are spliced on the bottom frame 6.

The front center door 32 is mounted with a front center door armrest 321, and the rear lower door 42 is mounted with a rear lower door armrest 421.

The front instrument door 31, the front middle door 32, and the front lower door 33 are mounted on the door hinges 37 of the left front side plate 21 in this order from top to bottom.

Specifically, the marine medium voltage power distribution cabinet provided by the embodiment of the invention comprises a bus bar chamber 1, a cable chamber 2, a switch chamber 5, an instrument chamber 4 and a small bus bar chamber 3 according to functional partitions.

In some embodiments, the switch cabinet 5 is defined by a retractable bulkhead 81, a contact box mounting plate 72, a top frame 7, an instrument room bent plate 311, a front center door 32, and a front center door explosion proof plate 322.

In some embodiments, instrument room 4 is formed by the surrounding instrument room bent plate 311, instrument room top cover 34, front instrument door 31, left side panels 11 and 12, and right side panels 21 and 22.

In some embodiments, the buscouple chamber 3 is formed by the enclosure of the buscouple chamber top cover 34, buscouple chamber cover 35, eyebrows 36, left side panels 11 and 12, right side panels 21 and 22, and buscouple chamber 3 is located in the upper portion of the buscouple chamber 4. The devices of the small bus room 3 are communicated, and only one end is closed when the bus room is installed close to the edge.

In some embodiments, the cable compartment 2 is defined by a rear upper door 41, a rear lower door 42, a bottom frame 6, a second intermediate partition 75, a bus compartment large bent plate 25, left side plates 11 and 12, and right side plates 21 and 22.

In some embodiments, the bus bar compartment 1 is formed by surrounding the bus bar compartment large bent plate 25, the top frame 7, the first middle partition plate 71, the left side plates 11 and 12, and the right side plates 21 and 22, and the bus bar compartment 1 is located at the rear upper portion of the switch compartment 5.

The bus bar compartment 1 includes a plurality of circular insulating bushings 231, and a horizontal bus bar 24, which is a main bus bar in a horizontal direction, passes through the plurality of circular insulating bushings 231. The horizontal bus bars 24 are copper bars with rectangular cross sections or D-shaped copper tubes, and the number of the horizontal bus bars 24 can be configured according to the needs of the person in the field, for example, the number can be 3, which is not described herein. The horizontal bus 24 is secured to the bus-room large bent plate 25 and the first intermediate partition 71 by insulators 232. The busbar chamber 1 and the switch chamber 5 are electrically connected by a branch busbar (not shown in the figure), which is a rectangular copper bar mounted on a contact box 73, and the contact box 73 is mounted on a contact box mounting plate 72. The left rear side plate 12 and the right rear side plate 22 are provided with reserved holes on the two sides of the bus bar chamber 1, namely, the upper parts of the left rear side plate 12 and the right rear side plate 22 are provided with sleeve mounting plates 23, the sleeve mounting plates 23 are provided with circular insulating sleeves 231, and the horizontal bus bars 24 penetrate through the circular insulating sleeves 231 and are connected with other power distribution devices, so that all the devices of the bus bar chamber 1 are penetrated through, and only one end is closed when the devices are close to the side.

Specifically, the busbar chamber 1 is electrically connected to the switch chamber 5 through a branch busbar, the branch busbar being mounted on the contact box 73, the contact box 73 being mounted on the contact box mounting plate 72. Specifically, the horizontal bus bar 24 is connected with a branch bus bar in a downward direction, and then connected to an upper end of the switch 38 of the switch room 5 via the insulating contact box 73 in the bus bar room 1, a lower end of the switch 38 is connected with a branch bus bar of the cable room 1 via the insulating contact box 73 of the cable room 2, a cable connected to a terminal device is connected to the branch bus bar of the cable room 1, the switch 38 can open and close a circuit, and the switch 38 can be drawn out in a sliding manner through the first rail 821 and the second rail (not shown in the drawing) so as to be separated from the live circuit, and the switch 38 includes a breaker cart, a contactor cart, an isolation cart, and the like. The instrument room 4 is provided with various display instruments for measuring and displaying parameters such as voltage and current of a main circuit, and is provided with a button, a relay protection device and other control switches for switching on and off, so that a complete control circuit is formed from a horizontal bus of a power supply to terminal equipment, and the function of the medium-voltage power distribution cabinet is realized.

In some embodiments, front center door 32 is fitted with front center door explosion vent panel 322, rear upper door 41 is fitted with rear upper door explosion vent panel 411, and rear lower door 42 is fitted with rear lower door explosion vent panel 421;

the left front side plate 11 and the right front side plate 21 are provided with a first transverse group of studs, and the front middle door explosion-proof plate 322 is hung on the first group of studs through corresponding screws by using L-shaped mounting holes 84;

the left and right rear side panels 12 and 22 are mounted with transverse second and third sets of studs, and the rear upper and lower door explosion panels 411 and 421 are hung on the second and third sets of studs by corresponding screws using the L-shaped mounting apertures 84. The front middle door explosion-proof plate 322, the rear upper door explosion-proof plate 411 and the rear lower door explosion-proof plate 421 are provided with L-shaped holes, so that the rear middle door explosion-proof plate is convenient to hang on screws and convenient to take down from the screws. A rear door support plate 43 is attached to the rear door intermediate the left and right rear side plates 12, 22, and the rear door support plate 43 serves to support the left and right rear side plates 12, 22 and to close the rear upper and lower doors 41, 42.

In some embodiments, a plurality of cushion pads 61 are mounted on the bottom of the bottom frame 6, and the cushion pads 61 are made of rubber supporting materials or spring cushioning supporting materials.

In some embodiments, the power distribution cabinet further comprises two L-shaped upright posts 74 spliced on the bottom frame 6, wherein the two L-shaped upright posts 74 are sequentially provided with a first middle partition plate 71, a contact box mounting plate 72 and a second middle partition plate 75 from top to bottom, and the first middle partition plate 71, the contact box mounting plate 72 and the second middle partition plate 75 divide the power distribution cabinet into a front area and a rear area; the front region comprises the busbar chamber 1, the cable chamber 2, a first pressure relief channel 8 and a second pressure relief channel 9; the rear area comprises the busbar compartment 3, the meter compartment 4 and the switching compartment 5.

In some embodiments, the first guide rail 821 and the second guide rail 821 are symmetrically and fixedly installed on the left front side plate 11 and the right front side plate 21, respectively, and the switch 38 is inserted between the first guide rail 821 and the second guide rail. The upper parts of the first rail 821 and the second rail are provided with a shutter mechanism 83 for closing and opening a shutter on the contact box 73 for blocking the high-voltage live conductor when the switch 38 is withdrawn and inserted.

The first rail 821 and the second rail lower portion are installed with a withdrawable partition 81, and the withdrawable partition 81 serves to close the front middle door 32 and the front lower door 33 and support the left front side plate 11 and the right front side plate 21.

In some embodiments, after the explosion of the arcing fault is generated in the switching chamber 5, the blast and the explosion gas are perforated at the corresponding positions of the top frame 5, the switching chamber pressure release cover 513 is opened, only one side of the switching chamber pressure release cover 513 is provided with a metal fixing screw, and the other side is provided with a nylon fixing screw, the nylon fixing screw is broken after being subjected to the force of the blast and the explosion gas, the blast and the explosion gas are flushed into the first pressure release channel 8, and are discharged out of the cabin to the left or right direction through the first pressure release channel 8, so that the whole pressure release and explosion discharge process is completed, and the pressure gas is not leaked or overflowed in a very small amount to the extent that personnel on the front operation surface of the equipment cannot be injured due to the sealing of the front middle door 32 and the reinforcement of the front middle door explosion plate 322. After the bus-bar chamber 1 generates arcing fault explosion, the shock wave and the explosion gas are opened through the openings at the corresponding positions of the top frame 5, and the bus-bar chamber pressure release cover 512 is opened to be flushed into the first pressure release channel 8 and discharged out of the cabin. When the cable chamber 2 is subjected to arcing fault explosion, the shock wave and the explosion gas are blown into the first pressure relief channel 8 and discharged out of the cabin through the second pressure relief channel 9 with the enlarged cross section, and the pressure gas is not leaked or overflowed in a very small amount due to the sealing of the rear upper door 41 and the rear lower door 42 and the reinforcement of the rear upper door explosion-proof plate 411 and the rear lower door explosion-proof plate 421, so that the injury degree of personnel on the front operation surface of the equipment is not reached. By additionally installing the rear upper door explosion-proof plate 411 and the rear lower door explosion-proof plate 421, the cross section of the second pressure relief channel 9 upwards of the cable chamber 2 is enlarged, and the power distribution cabinet is improved in safety.

In summary, the marine medium-voltage power distribution cabinet provided by the embodiment of the invention comprises a bottom frame, a top frame, a left side plate, a right side plate, a front door, a rear door and an installation space formed by surrounding the bottom frame, wherein the installation space comprises a bus chamber, a cable chamber, a switch chamber, an instrument chamber and a small bus chamber; the tops of the bus chamber, the cable chamber and the switch chamber are respectively provided with a bus chamber pressure relief cover, a cable chamber pressure relief cover and a switch chamber pressure relief cover; the bus chamber pressure relief cover, the cable chamber pressure relief cover, the switch chamber pressure relief cover and the top space form a first pressure relief channel, compared with a land medium-voltage power distribution switch cabinet, the height of the first pressure relief channel is flush with the small bus chamber, so that the safety of the marine medium-voltage power distribution cabinet is improved, the height and depth of the power distribution cabinet are not increased, the economic investment is small, and the effect is obvious;

further, the bus room large bending plate, the rear door, the left side plate, the right side plate, the bottom frame and the cable room pressure release cover are surrounded to form a second pressure release channel, and the safety of the cable room is improved by forming the second pressure release channel;

further, the front middle door is provided with a front middle door handrail, and the rear lower door is provided with a rear lower door handrail, so that an operator can conveniently patrol and simply maintain the equipment when the ship body shakes;

further, the front middle door is provided with a front middle door explosion-proof plate, the rear upper door is provided with a rear upper door explosion-proof plate, and the rear lower door is provided with a rear lower door explosion-proof plate, so that pressure gas does not leak or overflows in a very small amount to the extent that personnel injury cannot be achieved;

further, a plurality of buffer pads are arranged at the bottom of the bottom frame, and the buffer pads are made of rubber supporting materials or spring buffer supporting materials, so that the influence of ship vibration on a power distribution device is reduced;

further, the land medium voltage power distribution switch cabinet is relatively large in size of horizontal buses and corresponding oval insulating bushings for bearing total current of the power distribution system due to the fact that total capacity of the power distribution system is considered, the cross section area of the horizontal buses is large or a plurality of horizontal buses are used in parallel, and the total capacity of ship power distribution is far smaller than that of land power distribution, so that the depth of a bus chamber can be compressed by using the circular insulating bushings with smaller size and the horizontal buses with smaller cross section, a second pressure release channel of a cable chamber is enlarged, gas and pressure after the cable chamber is smoothly and rapidly discharged, and therefore the power distribution device has better internal arcing fault tolerance capability.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (12)

1. The marine medium-voltage power distribution cabinet is characterized by comprising a bottom frame, a top frame, a left side plate, a right side plate, a front door, a rear door and an installation space formed by surrounding the bottom frame, wherein the installation space comprises a bus chamber, a cable chamber, a switch chamber, an instrument chamber and a small bus chamber;

the tops of the bus chamber, the cable chamber and the switch chamber are respectively provided with a bus chamber pressure relief cover, a cable chamber pressure relief cover and a switch chamber pressure relief cover;

the bus chamber pressure relief cover, the cable chamber pressure relief cover, the switch chamber pressure relief cover and the top space form a first pressure relief channel;

the height of the first pressure relief channel is flush with the busbar chamber.

2. The marine medium voltage power distribution cabinet of claim 1, wherein the bus-bar compartment large bent plate, the back door, the left side plate, the right side plate, the bottom frame and the cable compartment pressure relief cover are surrounded to form a second pressure relief channel.

3. The marine medium voltage power distribution cabinet of claim 2, wherein the left side panel comprises a left front side panel and a left rear side panel, the right side panel comprises a right front side panel and a right rear side panel, the front door comprises a front instrument door, a front middle door and a front lower door, and the rear door comprises a rear upper door and a rear lower door;

the front middle door is provided with a front middle door handrail, and the rear lower door is provided with a rear lower door handrail;

the front instrument door, the front middle door and the front lower door are sequentially arranged on the door hinges of the left front side plate from top to bottom.

4. A marine medium voltage power distribution cabinet as claimed in claim 3 wherein the front middle door is provided with a front middle door explosion-proof plate, the rear upper door is provided with a rear upper door explosion-proof plate, and the rear lower door is provided with a rear lower door explosion-proof plate;

the left front side plate and the right front side plate are provided with a first transverse group of studs, and the front middle door explosion-proof plate is hung on the first group of studs through corresponding screws by using L-shaped mounting holes;

the left rear side plate and the right rear side plate are provided with a second group of transverse studs and a third group of transverse studs, and the rear upper door explosion-proof plate and the rear lower door explosion-proof plate are hung on the second group of studs and the third group of studs through corresponding screws by using L-shaped mounting holes.

5. The marine medium voltage power distribution cabinet according to claim 1, wherein a plurality of cushion pads are installed at the bottom of the bottom frame, and the cushion pads are made of rubber supporting materials or spring cushioning supporting materials.

6. The marine medium voltage power distribution cabinet of claim 3, further comprising two L-shaped columns, wherein a first intermediate partition, a contact box mounting plate and a second intermediate partition are sequentially installed on the two L-shaped columns from top to bottom, and the first intermediate partition, the contact box mounting plate and the second intermediate partition divide the power distribution cabinet into a front area and a rear area;

the front region includes the bus bar compartment, the cable compartment, the first pressure relief channel, and the second pressure relief channel;

the rear region includes the busbar compartment, the meter compartment, and the switch compartment.

7. The marine medium voltage power distribution cabinet of claim 6, further comprising a first guide rail and a second guide rail, wherein the first guide rail and the second guide rail are symmetrically and fixedly mounted on the left front side plate and the right front side plate, respectively, and a switch is inserted between the first guide rail and the second guide rail;

the first guide rail and the second guide rail are provided at lower portions thereof with a withdrawable partition plate for closing the front center door and the front lower door and supporting the left front side plate and the right front side plate.

8. The marine medium voltage power distribution cabinet of claim 7, wherein the switch cabinet is defined by the extractable partition, the contact box mounting plate, the top frame, the instrument room bent plate, the front center door, and the front center door explosion proof plate.

9. A marine medium voltage power distribution cabinet as claimed in claim 3 wherein the meter compartment is formed by a meter compartment bent plate, a meter compartment top cover, the front meter door, the left side plate, the right side plate.

10. The marine medium voltage power distribution cabinet of claim 1, wherein the small bus bar chamber is formed by surrounding an instrument room top cover, a small bus bar chamber cover plate, an eyebrow, the left side plate and the right side plate, and the small bus bar chamber is positioned at the upper part of the instrument room.

11. The marine medium voltage power distribution cabinet of claim 6, wherein the bus bar chamber is formed by surrounding the bus bar chamber large bent plate, the top frame, the first middle partition plate, the left side plate and the right side plate, and the bus bar chamber is positioned at the rear upper part of the switch chamber;

the bus room comprises a plurality of circular insulating sleeves, and the main bus bar in the horizontal direction passes through the circular insulating sleeves;

the bus chamber is in circuit connection with the switch chamber through a branch bus, the branch bus is installed on the contact box, and the contact box is installed on the contact box installation plate.

12. The marine medium voltage power distribution cabinet of claim 6, wherein the cable chamber is defined by the rear upper door, the rear lower door, the bottom frame, the second intermediate partition, the bus bar chamber large bent plate, the left side plate, the right side plate.

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