CN210628901U - Low-voltage switch cabinet - Google Patents

Abstract

A low-voltage switch cabinet belongs to the technical field of low-voltage electrical appliances. Including the cabinet body, the cabinet body is circuit breaker room and bottom air chamber including the generating line room that is located cabinet body upper portion, the front side of generating line room below, the bottom air chamber is located the below of circuit breaker room, the rear side of generating line room below is the cable chamber, cable chamber and circuit breaker room, bottom air chamber is adjacent around all, the front side air intake has been seted up to the lower part position of bottom air chamber front side, be equipped with back compartment board between bottom air chamber and the cable chamber, the lower part rear side of cable chamber is equipped with the rear side air inlet, characteristics: the rear compartment plate is provided with compartment vent holes, so that external air enters the bottom cavity from the front side air inlet and enters the bottom cavity from the rear side air inlet through the compartment vent holes, the air in the bottom cavity then passes through the breaker chamber and enters the bus chamber, and finally the air is discharged out of the cabinet body. The advantages are that: through increasing rear side inlet air channel, increase the air circulation volume to improve low-voltage switchgear's radiating effect.

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 more than 0.8 or even under the condition that the capacity reduction is not allowed, the drawer loop of the drawer type low-voltage switch cabinet provided by the prior art is affected by the large ventilation wind resistance of the original drawer structure, so that the ventilation and the heat dissipation are not smooth. The concrete conditions are as follows: the front side air intake has generally been seted up to current low-voltage switchgear's front side, and in order to satisfy shell protection level's requirement, the air intake generally sets up to the bridging hole or sets up other holes, but need cover the welding steel wire net in the inboard installation of front side cabinet board, and this kind of structure makes the intake of front side air intake limited to lead to the temperature rise in the drawer return circuit great, hardly satisfy the standard specified value.

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 switch cabinet, it is through increasing rear side inlet channel, increases the air current volume to improve low-voltage switch cabinet'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 breaker chamber and a bottom empty chamber positioned at the front side below the bus chamber, the bottom empty chamber is positioned below the breaker chamber, a cable chamber is positioned at the rear side below the bus chamber, the cable chamber and the breaker chamber and the bottom empty chamber are both adjacent in the front and back direction, a front air inlet is arranged at the lower part of the front side of the bottom empty chamber, a rear partition plate is arranged between the bottom empty chamber and the cable chamber, a rear air inlet is arranged at the rear side of the lower part of the cable chamber, a partition air vent is arranged on the rear partition plate, so that external air enters the bottom empty chamber from the front air inlet and enters the bottom empty chamber through the partition air inlet, air in the bottom empty chamber enters the bus chamber through the breaker chamber, and finally, discharging the waste water out of the cabinet body.

In a specific embodiment of the present invention, the switch cabinet further includes a drawer, the breaker chamber is divided into a plurality of stacked unit chambers, the unit chambers are used for accommodating the drawer, the drawer has a drawer bottom plate, and a first vent hole is formed in the drawer bottom plate; a drawer chamber supporting plate is arranged between the upper unit chamber and the lower unit chamber, and a supporting plate vent hole is formed in the drawer chamber supporting plate; the pallet vent hole on the drawer chamber pallet is aligned with the front-back direction hole cavity of the first vent hole on the drawer bottom plate.

In another specific embodiment of the present invention, the top and the bottom of the breaker chamber are both provided with a partition board, a partition board vent hole is provided on each partition board, and the partition board vent hole of the bottom partition board is aligned with the front and rear holes of the first vent hole on the drawer bottom board.

In another specific embodiment of the present invention, the first ventilation hole on the bottom plate of the drawer is a "T" shaped hole.

In another specific embodiment of the present invention, the drawer bottom plate is further provided with a second vent hole.

The utility model discloses a still have a concrete embodiment, the front side of the cabinet body still is equipped with the air compartment room, the air compartment room be located one side of circuit breaker room and bottom air compartment, and be located the below of generating line room, set up the lateral wall air vent on the lateral wall adjacent with the air compartment room of drawer for the indoor air current of circuit breaker gets into the air compartment room through this lateral wall air vent, discharges the heat outside the cabinet by the air current in the air compartment again.

The utility model discloses a further concrete embodiment, the cabinet back door is installed to the rear side of the cabinet body, the cabinet back door including the last cabinet back door that corresponds to the generating line room and the lower cabinet back door that corresponds to the cable chamber last cabinet back door on seted up the rear side air outlet, and the rear side air inlet has been seted up to the lower part of lower cabinet back door, the front side at generating line room top is equipped with the venthole, the rear side at generating line room top still is equipped with back top air outlet.

In a more specific embodiment of the present invention, two sides of the drawer chamber supporting plate are provided with supporting plate bending edges, and the supporting plate bending edges are used for installing the drawer chamber supporting plate on a corresponding cross beam in the cabinet body; bottom plate edges of bending are arranged on two sides of the bottom plate of the drawer, and the bottom plate edges of bending are used for installing side plates of the drawer.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: firstly, as the rear compartment plate is provided with the compartment vent holes, the drawer at the front side of the low-voltage switch cabinet has air flowing in from the front side and air flowing in from the rear side, so that the air input of cooling air flow is increased, and the heat dissipation effect is improved; secondly, the pallet vent hole on the pallet of the drawer chamber is aligned with the front-back hole cavity in the first vent hole on the drawer bottom plate, and the clapboard vent hole of the clapboard is aligned with the front-back hole cavity in the first vent hole on the drawer bottom plate, so that the circulation of air flow is accelerated, and the resistance of the air flow is reduced.

Drawings

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

Fig. 2 is the rear side structure schematic diagram of the low-voltage switch cabinet of the utility model.

Fig. 3 is the top structure schematic diagram of the low-voltage switch cabinet of the present invention.

Fig. 4 is the side structure schematic diagram of the low-voltage switch cabinet of the utility model.

Fig. 5 is a schematic diagram of a drawer bottom plate of the low-voltage switch cabinet of the present invention.

Fig. 6 is a schematic side view of the drawer bottom plate of the low-voltage switch cabinet of the present invention.

Fig. 7 is the schematic view of the upper and lower partition boards of the breaker chamber of the low-voltage switch cabinet.

Fig. 8 is a schematic diagram of a drawer chamber supporting plate in a breaker chamber of a low-voltage switch cabinet.

Fig. 9 is a schematic side view of a drawer chamber support plate in a breaker chamber of a low-voltage switch cabinet.

Fig. 10 is a schematic view of a lower rear compartment plate of the low-voltage switchgear of the present invention.

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

10. a column; 20. a cross beam; 30. a baffle plate 301, a baffle plate vent hole; 40. a drawer chamber supporting plate, 401 supporting plate vent holes, 402 supporting plate bending edges; 50. a cabinet rear door 501, an upper cabinet rear door 502, a lower cabinet rear door; 60. a rear compartment plate, 601. compartment vents;

100. a front side air inlet; 200. an air outlet; 300. a rear air inlet, a 400 rear air outlet and a 500 rear top air outlet;

2. the drawer comprises a drawer, 21, a drawer bottom plate, 211, a first vent hole, 212, a second vent hole and 22, a bottom plate bent edge; 3. a bus bar clamp; 4. and (4) a conductive bar.

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 4, the low-voltage switch cabinet includes a cabinet body 1, the cabinet body 1 is generally formed by a frame of the cabinet body 1 by columns 10 and beams 20, various cabinet plates 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 top of the cabinet body 1, and a circuit breaker chamber 12 and a bottom empty chamber 13 are arranged below the bus chamber 11. The bus chamber 11 is located at the top of the cabinet body 1 and used for installing the bus clamp 3 and the conductive bar 4, and the conductive bar 4 extends outwards after being fixed by the bus clamp 3 and is used for wiring of a low-voltage switch cabinet. The breaker chamber 12 is located in the middle of the cabinet 1, and is divided into a plurality of stacked unit chambers 121 for accommodating drawers 2 of the breaker, and the drawers 2 can be pushed in or pulled out, so as to realize the connection or disconnection of the breaker. The bottom space 13 is typically a hollow space and is not equipped with components for the inlet air of the low-voltage switchgear cabinet, i.e. the inflow of air outside the low-voltage switchgear cabinet. The front side of the cabinet body 1 is further provided with an empty compartment 14, and the empty compartment 14 is located on one side of the breaker chamber 12 and the bottom empty chamber 13 and is located below the bus chamber 11.

As shown in fig. 1, a front air inlet 100 is opened on a lower cabinet plate at the front side of the cabinet body 1, and the front air inlet 100 is located below the front side of the bottom empty chamber 13. In order to meet the requirement of the shell protection grade IP40, the front air inlet 100 needs to be provided with a bridge hole or other holes, and a cover-welded steel wire mesh is installed inside the front air inlet 100. As shown in fig. 3, an air outlet 200 is provided at the front side of the top of the bus bar room 11, that is, the front side of the top of the cabinet 1, and a ventilation grid is usually installed on the air outlet 200 to meet the requirement of the protection grade of the outer shell. As shown in fig. 3 and 7, the breaker chamber 12 has partitions 30 mounted on the top and bottom thereof, and each partition 30 has a partition vent 301. Typically, the baffle vent holes 301 are formed by a plurality of rows of elongated holes. As shown in fig. 8 and 9, a drawer chamber supporting plate 40 is disposed between adjacent upper and lower unit chambers 121 of the breaker chamber 12, a supporting plate vent hole 401 is formed in the drawer chamber supporting plate 40, and supporting plate bending edges 402 are disposed at two sides of the drawer chamber supporting plate 40, and the supporting plate bending edges 402 are used for mounting the drawer chamber supporting plate 40 on a corresponding cross beam 20 in the cabinet 1. In the case of the drawer 2 disposed in the unit chamber 121 of the breaker chamber 12, the drawer 2 may be understood as a single unit module in which the circuit breaker and other necessary parts are installed, forming an independent unit module that can be drawn out and pushed in. As shown in fig. 5 and 6, the drawer 2 has a drawer bottom 21, and the drawer bottom 21 is provided with a first ventilation hole 211 and a second ventilation hole 212. Preferably, the first ventilation holes 211 are T-shaped holes, and the second ventilation holes 212 are strip-shaped holes. Two sides of the drawer bottom plate 21 are provided with bottom plate bending edges 22, and the bottom plate bending edges 22 are used for installing side plates of the drawer 2.

As shown in fig. 2 to 4, the rear side of the breaker chamber 12 is a cable chamber 15, the cable chamber 15 is located below the bus bar chamber 11, and the breaker chamber 12 and the cable chamber 15 are adjacent to each other in the front-rear direction. The cable chamber 15 is intended to accommodate the conductor bar 4. A cabinet rear door 50 is installed at the rear side of the cabinet body 1. The cabinet rear door 50 in the present embodiment includes an upper cabinet rear door 501 corresponding to the bus bar compartment 11 and a lower cabinet rear door 502 corresponding to the cable compartment 15. The opened cabinet back door 50 is the cable chamber 15 and the bus bar chamber 11, specifically, the opened lower cabinet back door 502 is the cable chamber 15, and the opened upper cabinet back door 501 is the bus bar chamber 11. 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. it is composed of two symmetrical doors. The upper cabinet rear door 501 is provided with a rear side air outlet 400, the lower part of the lower cabinet rear door 502 is provided with a rear side air inlet 300, and the rear side of the top of the cabinet body 1 is also provided with a rear top air outlet 500. Namely, the rear side of the top of the bus bar room 11 is provided with a top air outlet 500. The airflow path at the rear side of the low-voltage switch cabinet is as follows: the outside air flows into the rear space of the cabinet 1 from the rear air inlet 300, moves upward, enters the bus bar room 11, and flows outside the cabinet. Specifically, the airflow flows out of the cabinet 1 through the air outlet 200, the rear side air outlet 400 or the rear top air outlet 500 in the bus chamber 11, and flows through the conductive bar 4 located at the rear side of the cabinet 1, so that the heat dissipation effect of the conductive bar 4 is improved.

As shown in fig. 4 and 10, a rear compartment plate 60 is disposed between the bottom empty chamber 13 and the cable chamber 15 of the low-voltage switch cabinet, and a compartment vent 601 is disposed on the rear compartment plate 60, preferably, the compartment vent 601 is a strip-shaped hole. The compartment vents 601 allow air entering the cable compartment 15 from the rear side air intake 300 to enter the bottom plenum 13 through the compartment vents 601.

As shown in fig. 4, the airflow path at the front side of the low-voltage switch cabinet is: outside air enters the bottom hollow chamber 13 from the front side air inlet 100, meanwhile, outside air on the rear side also enters the bottom hollow chamber 13 through the rear side air inlet 300 and the isolation vent holes 601 on the rear compartment plate 60, the air in the bottom hollow chamber 13 flows upwards, enters the breaker chamber 12 after passing through the partition plate 30 at the bottom of the breaker chamber 12, then flows through the plurality of drawer bottom plates 21 and the drawer chamber supporting plates 40, finally enters the bus chamber 11 after passing through the partition plate 30 at the top of the breaker chamber 12, and finally flows to the outside of the cabinet body 1. In the air duct, because the compartment vent holes 601 are formed in the rear compartment plate 60, the drawer 2 at the front side of the low-voltage switch cabinet is cooled by the inflow air at the front side and the inflow air at the rear side, so that the air inflow of cooling air flow is increased, the heat dissipation effect is improved, and the heat generated by the circuit breaker in the circuit breaker chamber 12 can be quickly discharged outside the cabinet.

With continued reference to fig. 4, to better increase the airflow capacity of the air duct, the tray vent 401 on the drawer chamber tray 40 is aligned with the front-to-back aperture in the first vent 211 on the drawer bottom panel 21. Since a drawer bottom 21 and drawer compartment tray 40 are located between adjacent unit compartments 121, the tray vent 401 of the drawer compartment tray 40 is aligned with the front-to-back aperture of the first vent 211 of the drawer bottom 21 so that the airflow can pass directly and quickly through the drawer bottom 21 and drawer compartment tray 40 as it flows through the adjacent unit compartments 121. Similarly, at the bottom of the breaker chamber 12, since the partition 30 is adjacent to the drawer bottom 21, the partition ventilation holes 301 are aligned with the front-rear direction holes in the first ventilation holes 211 on the drawer bottom 21, which can also accelerate the circulation of the airflow and reduce the resistance to the airflow.

With continued reference to fig. 1, since the compartment 14 is a cavity and is adjacent to the breaker chamber 12 and the bottom compartment 13, a sidewall vent is opened on a sidewall of the drawer 2 adjacent to the compartment 14, so that the airflow in the breaker chamber 12 can enter the compartment 14 through the sidewall vent, and the airflow in the compartment 14 can exhaust heat to the outside of the cabinet.

Claims (8)

1. The utility model provides a low-voltage switch cabinet, includes cabinet body (1), the front side of the cabinet body (1) below bus-bar room (11), bus-bar room (11) that are located cabinet body (1) upper portion is circuit breaker room (12) and bottom dead space (13), and bottom dead space (13) are located the below of circuit breaker room (12), and the rear side of bus-bar room (11) below is cable chamber (15), cable chamber (15) with circuit breaker room (12), bottom dead space (13) all around adjacent, front side air intake (100) have been seted up to the lower part position of bottom dead space (13) front side, be equipped with back compartment board (60) between bottom dead space (13) and cable chamber (15), the lower part rear side of cable chamber (15) is equipped with rear side air intake (300), its characterized in that: the rear compartment plate (60) is provided with compartment vent holes (601), so that external air enters the bottom hollow chamber (13) from the front side air inlet (100), enters the bottom hollow chamber (13) from the rear side air inlet (300) and then enters the bottom hollow chamber (13) through the compartment vent holes (601), and then enters the bus chamber (11) after passing through the breaker chamber (12) and finally is discharged out of the cabinet body (1).

2. A low-voltage switchgear cabinet as claimed in claim 1, characterized in that said switchgear cabinet further comprises a drawer (2), said circuit breaker chamber (12) being divided into a plurality of stacked unit chambers (121), said unit chambers (121) being adapted to receive said drawer (2), said drawer (2) having a drawer bottom (21), said drawer bottom (21) being provided with a first vent hole (211); a drawer chamber supporting plate (40) is arranged between the upper unit chamber (121) and the lower unit chamber (121), and a supporting plate vent hole (401) is formed in the drawer chamber supporting plate (40); the pallet vent hole (401) on the drawer chamber pallet (40) is aligned with the front-back direction bore of the first vent hole (211) on the drawer bottom plate (21).

3. A low-voltage switchgear cabinet as claimed in claim 2, characterized in that the breaker chamber (12) is provided with partitions (30) at the top and bottom, each partition (30) being provided with a partition vent (301), the partition vents (301) of the bottom partition (30) being aligned with the front-rear holes of the first vents (211) in the drawer bottom (21).

4. A low-voltage switchgear cabinet according to claim 2, characterized in that the first ventilation hole (211) in the drawer bottom (21) is a "T" shaped hole.

5. The low-voltage switch cabinet according to claim 2, wherein the drawer bottom plate (21) is further provided with a second vent hole (212).

6. A low-voltage switchgear cabinet as claimed in claim 2, wherein the front side of the cabinet body (1) is further provided with a compartment (14), the compartment (14) is located at one side of the breaker chamber (12) and the bottom compartment (13) and below the bus bar chamber (11), and a side wall vent hole is formed in a side wall of the drawer (2) adjacent to the compartment (14), so that the airflow in the breaker chamber (12) enters the compartment (14) through the side wall vent hole, and the airflow in the compartment (14) discharges heat to the outside of the cabinet.

7. The low-voltage switch cabinet according to claim 1, characterized in that a cabinet back door (50) is installed at the back side of the cabinet body (1), the cabinet back door (50) comprises an upper cabinet back door (501) corresponding to the bus bar room (11) and a lower cabinet back door (502) corresponding to the cable room (15), a back side air outlet (400) is formed in the upper cabinet back door (501), a back side air inlet (300) is formed in the lower portion of the lower cabinet back door (502), an air outlet hole (200) is formed in the front side of the top of the bus bar room (11), and a back top air outlet (500) is formed in the back side of the top of the bus bar room (11).

8. The low-voltage switch cabinet according to claim 2, wherein two sides of the drawer chamber supporting plate (40) are provided with supporting plate bending edges (402), the supporting plate bending edges (402) are used for installing the drawer chamber supporting plate (40) on corresponding cross beams (20) in the cabinet body (1); two sides of the drawer bottom plate (21) are provided with bottom plate bending edges (22), and the bottom plate bending edges (22) are used for installing side plates of the drawer (2).

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