CN210608130U

CN210608130U - Low-voltage switch cabinet

Info

Publication number: CN210608130U
Application number: CN201922138869.3U
Authority: CN
Inventors: 龚进; 胡建刚; 马健
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-05-22
Anticipated expiration: 2029-12-03

Abstract

A low-voltage switch cabinet comprises a cabinet body, the cabinet body comprises a bus chamber positioned at the upper part of the cabinet body, a circuit breaker chamber positioned at the front side of the switch cabinet and a cable chamber positioned at the rear side of the switch cabinet are arranged below the bus chamber, the circuit breaker chamber and the cable chamber are adjacent in the front and back directions, a channel block is arranged in the cable chamber, a partition plate between the circuit breaker chamber and the cable chamber and the channel block enclose a vertical bus channel, a vertical conductive bar is arranged in the vertical bus channel, an upper insulating sealing plate and a lower insulating sealing plate are arranged on the upper end surface and the lower end surface of the vertical bus channel, a rear-side air inlet is arranged below the cable chamber, a first heat dissipation hole is arranged on the upper insulating sealing plate, a second heat dissipation hole is arranged on the lower insulating sealing plate, air flows into the lower part of the cable chamber from the rear-side air inlet, enters the vertical bus channel through the second heat dissipation hole of the, and finally, discharging the waste water to the outside of the cabinet body. The air flow flux is increased by increasing the heat dissipation holes on the upper and lower insulating seal plates, and the heat dissipation effect is improved.

Description

Low-voltage switch cabinet

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to low-voltage switch cabinet.

Background

The low-voltage switch cabinet is widely applied to power distribution and control centers in the fields of large power generation plants, petroleum and petrochemical industry, national power grids and the like. When a user requires equipment to meet the requirement of a higher protection level IP40 and above, and the capacity reduction coefficient is greater than 0.8 or even under the condition that the capacity reduction is not allowed, the vertical bus duct of the drawer type low-voltage switch cabinet provided by the prior art is blocked by the upper and lower insulating sealing plates, ventilation and heat dissipation are not smooth, so that the temperature rise in the vertical bus duct is large, and the standard specified value is difficult to meet.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the structure of the existing low-voltage switchgear. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The task of the utility model is to provide a low-voltage switchgear, its air current volume that increases among the perpendicular busway through set up the louvre on the upper and lower insulating shrouding of perpendicular busway in the low-voltage switchgear to improve perpendicular busway's radiating effect.

The utility model aims to solve the problem, and provides a low-voltage switch cabinet, which comprises a cabinet body, wherein the cabinet body comprises a bus chamber positioned at the upper part of the cabinet body, a circuit breaker chamber positioned at the front side of the switch cabinet and a cable chamber positioned at the rear side of the switch cabinet are arranged below the bus chamber, the circuit breaker chamber and the cable chamber are adjacent in the front and back directions, a channel block is arranged in the cable chamber, a partition plate between the circuit breaker chamber and the cable chamber and the channel block enclose a vertical bus channel, a vertical conductive bar is arranged in the vertical bus channel, an upper insulating seal plate and a lower insulating seal plate are respectively arranged on the upper end surface and the lower end surface of the vertical bus channel, a rear side air inlet is arranged below the cable chamber, a first heat dissipation hole is arranged on the upper insulating seal plate, a second heat dissipation hole is arranged on the lower insulating seal plate, and air flows into the lower part of the cable chamber from the rear, and the second heat dissipation holes passing through the lower insulating sealing plate enter the vertical bus channel and continue to flow upwards, and the second heat dissipation holes passing through the upper insulating sealing plate flow into a bus chamber above the switch cabinet and are finally discharged to the outside of the cabinet body.

In a specific embodiment of the present invention, the top of the bus bar chamber is provided with a first air outlet and a second air outlet, the first air outlet is located at the front side of the top of the cabinet body, the second air outlet is located at the rear side of the top of the cabinet body, and the internal airflow of the bus bar chamber can be discharged out of the cabinet through the first air outlet and the second air outlet.

In another specific embodiment of the present invention, the channel block is placed in the cable chamber in a three-sided surrounding manner.

In another specific embodiment of the present invention, the channel block is in a "U" shape.

In another specific embodiment of the present invention, the channel block comprises a ventilation hood and a pair of supporting plates, the ventilation hood is opposite to the partition plate, and the pair of supporting plates are located on both sides of the ventilation hood.

In yet another specific embodiment of the present invention, the ventilation hood of the channel block is provided with air holes.

In yet another specific embodiment of the present invention, the first heat dissipation hole is a round hole or a square hole.

In a more specific embodiment of the present invention, the second heat dissipation holes are bar-shaped holes.

In yet another specific embodiment of the present invention, the diameter of the first heat dissipation hole is 2mm to 6 mm.

In a more specific embodiment of the present invention, the second heat dissipation holes have a length of 10mm to 50mm and a width of 2mm to 6 mm.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: firstly, a first heat dissipation hole and a second heat dissipation hole are respectively formed in an upper insulating sealing plate and a lower insulating sealing plate of a vertical bus duct, so that air flow in the vertical bus duct is smooth, and the heat dissipation effect is improved; secondly, a first air outlet hole and a second air outlet hole are formed in the top of the bus chamber, so that the air outlet quantity of an air passage in the bus chamber is increased, and the heat dissipation effect is improved; thirdly, because the ventilation hood for sealing the channel is provided with the air holes, when the air in the vertical bus channel is heated and rises, the air in the cabinet positioned outside the ventilation hood can be rapidly supplemented, thereby increasing the flow of the air flow and increasing the heat dissipation effect.

Drawings

Fig. 1 is the utility model discloses a low-voltage switchgear front side structure schematic diagram.

Fig. 2 is the perspective structure schematic diagram of the low-voltage switch cabinet of the present invention.

Fig. 3 is the rear side structure schematic diagram of the low-voltage switch cabinet of the utility model.

Fig. 4 is the inside rear view schematic diagram of the low-voltage switch cabinet of the utility model.

Fig. 5 is the inside of low-voltage switchgear looks sideways at the schematic diagram.

Fig. 6 is a schematic view of the interior of the low-voltage switchgear of the present invention.

Fig. 7 is the interior perpendicular busway of low-voltage switchgear goes up insulating shrouding schematic diagram.

Fig. 8 is the interior vertical bus duct of low-voltage switchgear is insulating shrouding schematic down.

Fig. 9 is the utility model discloses a top shrouding schematic diagram in the low-voltage switchgear.

In the figure: 1. the bus-bar cabinet comprises a cabinet body, 11 bus-bar chambers, 12 breaker chambers, 121 unit chambers, 13 cable chambers, 14 empty compartments and 15 vertical bus-bar channels;

10. a column; 20. a cross beam; 30. the cabinet comprises a partition plate, 40 parts of a top sealing plate, 401 parts of sealing plate vent holes, 402 parts of matching notches, 50 parts of a cabinet rear door, 501 parts of an upper cabinet rear door and 502 parts of a lower cabinet rear door;

100. the air conditioner comprises a first air outlet hole, a second air outlet hole 200, a rear air inlet 300, and a rear air outlet 400;

2. a drawer; 3. a first connection end; 4. a second connection end; 5. the heat dissipation structure comprises a channel block, a ventilation cover 51, a support plate 52, an upper insulating sealing plate 53, a first heat dissipation hole 531, a through hole 532, a lower insulating sealing plate 54, a second heat dissipation hole 541; 6. vertical conductive bar, 7 bus clip.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position shown in fig. 1, and thus, should not be interpreted as a specific limitation to the technical solution provided by the present invention.

As shown in fig. 1 and 2, the present invention relates to a low-voltage switchgear for low-voltage power distribution, in which a low-voltage circuit breaker (not shown in the figure) existing in the market is installed. After the low-voltage switch cabinet is connected to a power grid and a load, when a current fault occurs in a loop, the low-voltage circuit breaker can protect the load from being damaged by the fault current.

As shown in fig. 1 to 5, the low-voltage switch cabinet includes a cabinet body 1, the cabinet body 1 is usually formed by a frame of the cabinet body 1 formed by columns 10 and beams 20, various boards or cabinet doors are mounted on the frame to form the cabinet body 1 of the low-voltage switch cabinet, and a conductive bar, a circuit breaker and the like are mounted in the cabinet body 1 to form a complete low-voltage switch cabinet. The cabinet body 1 comprises a bus chamber 11 positioned at the upper part of the cabinet body 1, a function chamber and a cable chamber 13 are arranged below the bus chamber 11, the function chamber is positioned at the front side of the switch cabinet, and the cable chamber 13 is positioned at the rear side of the switch cabinet. The functional chamber includes a breaker chamber 12, that is, the breaker chamber 12 is adjacent to a cable chamber 13 in front and rear. The breaker chamber 12 is used for accommodating a breaker, and the bus chamber 11 and the cable chamber 13 are used for accommodating a conductive bar. When the circuit breaker is electrically connected with the conducting bar, the circuit breaker is connected into the power supply loop. And when the breaker is electrically disconnected with the conducting bar, the breaker exits from the power supply loop. The conductive bar extends out of the cabinet to form a first connecting end 3 and a second connecting end 4, and the first connecting end 3 and the second connecting end 4 are used for wiring of the switch cabinet. The front side of the cabinet body 1 is further provided with an empty compartment 14, and the empty compartment 14 is adjacent to the breaker chamber 12 and is located below the bus chamber 11. The breaker chamber 12 is divided into a plurality of stacked unit chambers 121 for installing a drawer 2 carrying the breaker, and the drawer 2 can be pushed in or pulled out, thereby realizing the work or overhaul of the breaker.

As shown in fig. 4 to 8, a channel block 5 is disposed in the cable chamber 13, and the channel block 5 is placed in the cable chamber 13 in a three-sided surrounding manner, specifically, the channel block 5 is "U" shaped. The baffle 30 between circuit breaker room 12 and cable chamber 13 with passageway block 5 enclose into a vertical bus duct 15, vertical bus duct 15 in install and lead electrical drainage 6 perpendicularly, vertical electrical drainage 6 fixed by bus-bar clamp 7, vertical bus duct 15 from the top down extend. The passage block 5 includes a ventilation hood 51 and a pair of support plates 52, the ventilation hood 51 is opposite to the partition plate 30, and the pair of support plates 52 are located at both sides of the ventilation hood 51. The ventilation hood 51 is provided with air holes, while the support plate 52 is usually not provided with air holes, i.e. the support plate 52 is a sealing plate. Specifically, the upper end of the vertical bus duct 15 is connected to the bus chamber 11, and the lower end of the vertical bus duct 15 is close to the bottom of the switchgear, but is spaced apart from the bottom of the switchgear. More specifically, the lower end of the vertical busbar channel 15 can cover at least the vertical conductor bar 6 corresponding to the lowermost drawer 2. An upper insulating seal plate 53 and a lower insulating seal plate 54 are respectively mounted on the upper end surface and the lower end surface of the vertical bus duct 15. As shown in fig. 7, the upper insulating sealing plate 53 is provided with a first heat dissipation hole 531 and a through hole 532 for passing the vertical conductive bar 6. The first heat dissipation hole 531 is used for air flow, and the shape of the passing hole 532 matches the shape of the vertical conductive bar 6. As shown in fig. 8, the lower insulating sealing plate 54 is provided with a second heat dissipation hole 541. Preferably, the first heat dissipation hole 531 may be a circular hole or a square hole, and the second heat dissipation hole 541 is a strip hole. More specifically, the aperture of the first heat dissipation hole 531 is 2mm to 6mm, and the length of the second heat dissipation hole 541 is 10mm to 50mm and the width thereof is 2mm to 6 mm. The air in the vertical bus duct 15 flows in through the second heat dissipation holes 541 of the lower insulating cover plate 54 and flows out into the bus bar room 11 through the first heat dissipation holes 531 of the upper insulating cover plate 53.

As shown in fig. 2 and 5, a first air outlet hole 100 is formed in the top of the bus bar room 11, that is, the top of the switch cabinet, and a ventilation fence is installed on the air outlet hole 100, so that the requirement of the enclosure protection grade IP40 is met. In this embodiment, the top of the bus bar chamber 11 is further opened with a second air outlet 200. The first air outlet 100 is located at the front side of the top of the cabinet 1, the second air outlet 200 is located at the rear side of the top of the cabinet 1, and the second air outlet 200 may be a bridge-shaped hole or other structures meeting the requirements. Due to the fact that the second air outlet hole 200 is additionally arranged, the air outlet quantity of the air channel in the bus chamber 11 is increased, and the heat dissipation effect is improved.

As shown in fig. 5 and 9, a top sealing plate 40 is further disposed between the cable chamber 13 and the bus bar chamber 11, the top sealing plate 40 is provided with a sealing plate vent hole 401 and a fitting notch 402, an air flow below the top sealing plate 40 can flow into the bus bar chamber 11 through the sealing plate vent hole 401, and the fitting notch 402 can be connected to the upper insulating sealing plate 53 to form a partition plate between the cable chamber 13 and the bus bar chamber 11.

As shown in fig. 3, a rear cabinet door 50 is installed at the rear side of the cabinet body 1 of the low-voltage switch cabinet. The cable compartment 13 and the bus bar compartment 11 are defined by opening the cabinet back door 50. In the present embodiment, the rear cabinet door 50 includes an upper rear cabinet door 501 located at an upper portion of the cabinet body 1 and a lower rear cabinet door 502 located below the upper rear cabinet door 501. Preferably, the upper cabinet back door 501 is a single-door, i.e. the door hinge is located at one side, and the lower cabinet back door 502 is a split-door, i.e. two symmetrical doors are formed. A rear side air outlet 400 is formed in the upper cabinet rear door 501, and the rear side air outlet 400 corresponds to the bus bar room 11. And the lower part of the lower cabinet back door 502 is provided with a back side air inlet 300, and the back side air inlet 300 corresponds to the cable chamber 3.

As shown in fig. 5, the airflow path at the rear side of the low-voltage switch cabinet is: the air flows into the lower part of the cable chamber 13 from the rear air inlet 300, moves upwards, enters the vertical bus duct 15 through the second heat dissipation holes 541 of the lower insulation sealing plate 54, continues to flow upwards, flows into the bus chamber 11 above the switch cabinet through the first heat dissipation holes 531 of the upper insulation sealing plate 53, and can be discharged outside the cabinet through the rear air outlet 400, the first air outlet 100 and the second air outlet 200 in the bus chamber 11. Because the ventilating hood 51 of the channel block 5 is provided with the air holes, when the air in the vertical bus duct 15 is heated and rises, the air in the cabinet positioned outside the ventilating hood 51 can be quickly supplemented, thereby increasing the flow of the air flow and increasing the heat dissipation effect.

Claims

1. A low-voltage switch cabinet comprises a cabinet body (1), wherein the cabinet body (1) comprises a bus chamber (11) positioned on the upper part of the cabinet body (1), a circuit breaker chamber (12) positioned on the front side of the switch cabinet and a cable chamber (13) positioned on the rear side of the switch cabinet are arranged below the bus chamber (11), the circuit breaker chamber (12) and the cable chamber (13) are adjacent in the front and at the back, a channel block (5) is arranged in the cable chamber (13), a partition plate (30) between the circuit breaker chamber (12) and the cable chamber (13) and the channel block (5) enclose a vertical bus channel (15), a vertical conductive bar (6) is arranged in the vertical bus channel (15), an upper insulating sealing plate (53) and a lower insulating sealing plate (54) are respectively arranged on the upper end face and the lower end face of the vertical bus channel (15), and a rear-side air inlet (300) is arranged below the cable chamber (13), the method is characterized in that: the upper insulation sealing plate (53) is provided with a first heat dissipation hole (531), the lower insulation sealing plate (54) is provided with a second heat dissipation hole (541), air flows into the lower portion of the cable chamber (13) from the rear side air inlet (300), enters the vertical bus duct (15) through the second heat dissipation hole (541) of the lower insulation sealing plate (54) and continues to flow upwards, flows into the bus chamber (11) above the switch cabinet through the first heat dissipation hole (531) of the upper insulation sealing plate (53), and is finally discharged out of the cabinet body (1).

2. The low-voltage switch cabinet according to claim 1, wherein the top of the bus bar chamber (11) is provided with a first air outlet hole (100) and a second air outlet hole (200), the first air outlet hole (100) is located at the front side of the top of the cabinet body (1), the second air outlet hole (200) is located at the rear side of the top of the cabinet body (1), and air flow in the bus bar chamber (11) can be discharged out of the cabinet through the first air outlet hole (100) and the second air outlet hole (200) upwards.

3. Low-voltage switchgear cabinet according to claim 1, characterized in that the channel closure (5) is placed in the cable compartment (13) in a three-sided surround.

4. Low-voltage switchgear cabinet according to claim 3, characterized in that said channel closure (5) is "U" -shaped.

5. Low-voltage switchgear cabinet according to claim 1, characterized in that said access barrier (5) comprises a cowling (51) and a pair of support plates (52), said cowling (51) being opposite said partition (30), and said pair of support plates (52) being located on either side of said cowling (51).

6. Low-voltage switchgear cabinet according to claim 5, characterized in that the ventilation hood (51) of the passage closure (5) is provided with air holes.

7. The low-voltage switchgear cabinet according to claim 1, wherein the first heat dissipation hole (531) is a round hole or a square hole.

8. The low-voltage switchgear cabinet according to claim 1, wherein said second heat dissipation hole (541) is a strip hole.

9. The low-voltage switchgear cabinet as claimed in claim 7, wherein said first heat dissipation hole (531) has an aperture of 2mm to 6 mm.

10. The low-voltage switchgear cabinet according to claim 8, wherein said second heat dissipation hole (541) has a length of 10mm to 50mm and a width of 2mm to 6 mm.