CN113541030A

CN113541030A - Low-voltage complete switch cabinet

Info

Publication number: CN113541030A
Application number: CN202010307110.8A
Authority: CN
Inventors: 吴来顺; 南添; 刘万里; 姚伟; 罗沈; 徐胜; 刘刚; 罗宇敏; 刘毅; 王雷; 南寅
Original assignee: Sooar Tianjin Electrical Equipment Co ltd
Current assignee: Sooar Tianjin Electrical Equipment Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2021-10-22
Anticipated expiration: 2040-04-17
Also published as: CN113541030B

Abstract

A low-voltage complete switch cabinet at least comprises a cabinet body, a drawer chamber at the front part of the switch cabinet, a bus chamber at the rear part of the switch cabinet and a bus, wherein the drawer chamber comprises at least one drawer device, a partition plate is arranged between the drawer chamber and the bus chamber, a plurality of through holes are also arranged on the partition plate, the addition area of the through holes is not less than 5 percent of the total area of the partition plate, the drawer device comprises a left side plate, a right side plate, a front baffle plate, a rear baffle plate and a bottom plate, a plurality of through holes are arranged on the left side plate and the right side plate, a plurality of through holes are also arranged on the rear baffle plate, a plurality of through holes arranged on the partition plate and a plurality of through holes arranged on the rear baffle plate are just opposite or staggered, and the high-temperature gas in the drawer chamber passes through the circulation convection of the through holes and low-temperature gas outside the cabinet by utilizing the principle of multiple circulation convection, thereby reducing the temperature in the drawer chamber, the safety and the reliability of the operation of the low-voltage complete switch cabinet are improved.

Description

Low-voltage complete switch cabinet

Technical Field

The application belongs to the technical field of low-voltage power distribution, and particularly relates to a low-voltage complete switch cabinet.

Background

Each cabinet body of the low-voltage switch cabinet set is divided into three chambers, namely a bus chamber (at the rear part of the cabinet), a drawer chamber (at the front part of the cabinet) and a cable chamber. The chambers are separated from each other by steel plates or high-strength flame-retardant plastic functional plates, and the upper drawer and the lower drawer are isolated by metal plates with ventilation holes, so that the accidents caused by flashover of the switching elements due to faults or short circuit of buses and other lines are effectively prevented.

As shown in FIG. 1, the ventilation principle of the existing switch cabinet has a great technical problem, that is, the drawer chamber in the front of the switch cabinet is formed by stacking a plurality of drawers up and down, the upper and lower drawers are partially separated by a metal plate with ventilation holes, the temperature of the air in the cabinet is high by utilizing the heat generated by the switch electric appliance in the drawer during operation, a pressure difference is formed by the temperature difference with the air outside the cabinet, the air with low outside temperature and high specific gravity is sucked from the bottom of the switch cabinet, after the air enters the drawer and is heated, the specific gravity of the air is reduced and rises, and the air passes through a plurality of drawers and then is discharged from the upper air opening of the switch cabinet, so that a chimney effect is formed, that is, the hot pressure causes natural ventilation, the excessive heat in the drawer is expected to be taken away by the chimney effect to ensure that the temperature in the drawer is at a normal level, but in the practical application, the electrical appliance elements installed in the drawer cabinet are many, and the ventilation holes between the upper and lower drawers are easy to block, the heat generated in the lower drawer is easy to gather in the upper drawer and cannot be discharged in time, so that the temperature in the upper drawer is quickly raised just like a steamer; the heat generated in the lowest drawer is blocked by the heat above, and the heat cannot be released upwards, so that the temperature in the lowest drawer is too high; in a word, once the temperature in the drawer is too high, insulation damage or internal electrical components are burnt, and great hidden danger is left for the stable operation of the complete switch cabinet.

In view of the above problems, it is necessary to develop a low-voltage switchgear assembly based on the multi-cycle convection ventilation principle.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a low-voltage complete switch cabinet based on a multi-cycle convection ventilation principle, so that the potential safety hazard of insulation damage or burning of internal electrical components caused by overhigh temperature in a drawer is avoided.

The specific technical scheme of the invention is as follows:

the utility model provides a low pressure complete set cubical switchboard, includes the cabinet body, the anterior drawer room of cabinet, cabinet rear portion bus-bar room and generating line at least, the drawer room includes at least one drawer device, the drawer room with be provided with an at least baffle between the bus-bar room, be provided with at least tripolar socket device that power supply connection used with insulating passage device and power supply connection usefulness on the baffle at least, still be provided with a plurality of through-holes on the baffle, the area that adds of a plurality of through-holes is no less than 5% of baffle total area.

Preferably, a plurality of through holes are formed in two side plates of the drawer device, at least a circuit breaker operating device and an instrument device are arranged on a front baffle plate of the drawer device, at least a device electrically connected with the bus and a device connected with the socket device are arranged on a rear baffle plate of the drawer device, a plurality of through holes are further formed in the rear baffle plate, and the sum area of the through holes is not less than 5% of the total area of the rear baffle plate.

Preferably, the through holes arranged on the partition board are opposite to or staggered with the through holes arranged on the rear baffle board. By utilizing the multiple circulation convection principle, high-temperature gas in the drawer chamber passes through the through holes to be in circulation convection with low-temperature gas outside the cabinet, so that the temperature in the drawer chamber is reduced, and the operation safety and reliability of the low-voltage complete switch cabinet are improved.

Preferably, a ventilation groove C1 or a hole C2 is provided around or/and in any one of the insulating passageway device, the socket device, the device electrically connected to the bus bar and the device connected to the socket device. Preferably, at least a circuit breaker operating device or/and a meter device is arranged on the front baffle of the drawer device, and ventilation grooves C3 or holes C4 are reserved on the peripheries of the circuit breaker operating device and the meter device.

Preferably, a circuit breaker is arranged in the drawer device, and a plurality of ventilation grooves C5 and/or holes C6 are arranged on a bottom plate of the drawer device below the circuit breaker.

Preferably, the area of the ventilation groove C1 and the hole C2 added together is not included in the area of the through hole provided in the partition or the through hole provided in the tailgate.

Preferably, the through hole arranged on the partition plate and the through hole arranged on the rear baffle plate do not allow objects with the diameter larger than 12.5mm to pass through, and the ventilation groove C3 or the hole C4 do not allow objects with the diameter larger than 2.5mm to pass through.

Preferably, the tailgate comprises at least one flap.

Preferably, the rear baffle comprises a first baffle and a second baffle, and the number or the area of the through holes arranged on the second baffle is more than that of the through holes arranged on the first baffle.

Preferably, the rear baffle comprises a first baffle and a second baffle, and the through holes are all arranged on the second baffle.

Preferably, the partition comprises at least one partition.

Preferably, the partition plates include a first partition plate and a second partition plate, and the number or area of the through holes provided in the second partition plate is greater than the number or area of the through holes provided in the first partition plate.

Preferably, the partition plate comprises a first partition plate and a second partition plate, and the through holes are all arranged on the second partition plate.

Borrow by above technical scheme, the beneficial effect of this application lies in:

1. the invention provides a low-voltage complete switch cabinet, which can realize circulating convection between hot air in the switch cabinet and air outside the cabinet through grooves or holes additionally arranged on a cabinet body and drawers, realize circulating convection between the hot air in the drawer and bus chamber air at the rear part of the cabinet through a vent hole on a rear baffle plate, solve the problem of poor ventilation only by the chimney effect in the up-down direction by means of measures such as enlarging the area of through holes among drawers, reduce the temperature in a drawer device, further reduce the consumption of copper materials, reduce the temperature rise of 1 ℃ or 1 percent by tests and after the measures are implemented, reduce the temperature rise of 5 ℃, reduce the consumption of copper of about 4.9kG by calculating the consumption of the copper of six drawers with 2500A buses as 98kG, reduce the consumption of the copper with the price of about 45 yuan per kilogram of T2 copper materials, and add up 220 yuan per set of switch cabinet, the annual consumption of the national grid low-voltage complete switch cabinets is 30 ten thousand, and not less than 5000 ten thousand yuan is saved each year; meanwhile, the emission of carbon dioxide is reduced, the greenhouse effect and the environmental pollution are reduced, the protection grade of the low-voltage complete switch cabinet is improved, and the operation safety and reliability of the low-voltage complete switch cabinet are improved.

2. According to the low-voltage complete switch cabinet, the plurality of ventilation holes are reserved in the drawer device and do not allow objects with the diameter larger than 12.5mm to pass through, so that the protection level inside the low-voltage complete switch cabinet reaches IP20, the plurality of ventilation grooves are formed in the front baffle of the drawer and do not allow objects with the diameter larger than 2.5mm to pass through, the protection level outside the low-voltage complete switch cabinet reaches IP30, and the safety of an operator is greatly guaranteed.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for assisting the understanding of the present application, and are not particularly limited to the shapes, the proportional sizes, and the like of the respective members in the present application. Those skilled in the art, having the benefit of the teachings of this application, may select various possible shapes and proportional sizes to implement the present application, depending on the particular situation. In the drawings:

fig. 1 is a schematic diagram of a chimney effect ventilation principle of a conventional switch cabinet.

Fig. 2 is a schematic view of the overall structure of the low-voltage switchgear assembly of the present invention.

Fig. 3 is a schematic structural diagram of a partition board according to an embodiment of the invention.

Fig. 4 is a schematic structural diagram of a drawer device and a partition according to an embodiment of the invention.

Fig. 5 is a schematic structural diagram of a front baffle according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a base plate according to an embodiment of the invention.

Fig. 7 is a schematic view of the multi-cycle convection ventilation principle of the switchgear of the present invention.

Fig. 8 is a schematic structural diagram of a drawer device and a partition according to another embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a drawer device and a partition according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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

As shown in fig. 2, the present invention provides a low voltage switchgear assembly 100, which at least comprises a cabinet body 110, a front drawer chamber 10 of the switchgear, a rear bus bar chamber 20 of the switchgear, and a bus bar 30 disposed in the bus bar chamber 20. Specifically, in the present embodiment, the front drawer chamber 10 of the switch cabinet includes 6 drawer devices 11, and a partition 12 is disposed between each drawer device 11 and the bus bar chamber 20. In other embodiments, the switch cabinet front drawer compartments 10 may be in other numbers, and are not limited herein.

As shown in fig. 3, the partition 12 is provided with an insulating passage device 12A for power supply connection and a three-pole socket device 12B for power supply connection, the partition 12 is further provided with a plurality of through holes 200, specifically, the through holes 200 are circular through holes with a diameter of phi 5mm and a center distance of 20mmX20mm, an added area of the through holes 200 is not less than 5% of a total area of the partition 12, a ventilation groove C1 or a hole C2 is provided around or/and in the insulating passage device 12A, a ventilation groove C1 or a hole C2 is provided around or/and in the three-pole socket device 12B for power supply connection, and an area of the ventilation groove C1 or the hole C2 is not included in the added area of the through holes 200.

As shown in fig. 4, the drawer device 11 includes a left side plate 111, a front baffle 112, a rear baffle 113, a right side plate 114 and a bottom plate 115, the left side plate 111 and the right side plate 114 are disposed oppositely, and two ends of the left side plate 111 and the right side plate 114 are respectively connected to the front baffle 112 and the rear baffle 113, the front baffle 112 and the rear baffle 113 are disposed oppositely, and the left side plate 111, the front baffle 112, the rear baffle 113, the right side plate 114 and the bottom plate 115 together enclose a containing space for containing the circuit breaker 10D and other electrical appliances. The left side plate 111 and the right side plate 114 are respectively provided with a plurality of through holes 300, and specifically, the through holes 300 are circular through holes with the diameter of phi 5mm and the center distance of 20mmX20 mm. The rear baffle 113 is provided with a device 11A electrically connected with the bus bar 30 and a device 11B electrically connected with the three-pole socket device 12B, the rear baffle 113 is provided with a plurality of through holes 400, specifically, the through holes 400 are circular through holes with the diameter of 5mm and the center distance of 20mmX20mm, the addition area of the through holes 200 is not less than 5% of the total area of the rear baffle 113, ventilation grooves C1 or holes C2 are also arranged around or/and in the device 11A electrically connected with the bus bar 30, ventilation grooves C1 or holes C2 are arranged around or/and in the device 11B electrically connected with the three-pole socket device 12B, and the area of the ventilation grooves C1 or holes C2 is not included in the addition area of the through holes 400. The through holes 200 arranged on the partition board 12 and the through holes 400 arranged on the rear baffle 113 are arranged just opposite or in a staggered mode, the through holes 200 and the through holes 400 do not allow objects with the diameter larger than 12.5mm to pass through, and the protection grade inside the switch cabinet is guaranteed to reach IP 20.

As shown in fig. 5, be provided with circuit breaker operating means 10E and instrument device 10F on the preceding baffle 112, circuit breaker operating means 10E is used for control circuit breaker 10D closes the separating brake operation, instrument device 10F is the instrument that is arranged in measuring line electric energy, circuit breaker operating means 10E is provided with air duct C3 or hole C4 all around, and is concrete, air duct C3 be 2 mm's width square groove or ventilation hole C4 be the circular through-hole of diameter phi 2mm, instrument device 10F is provided with air duct C3 or hole C4 all around, and is concrete, and air duct C3 is that 2 mm's width square groove or ventilation hole C4 is the circular through-hole of diameter phi 2mm for the diameter, and air duct C3 or hole C4 do not let the diameter be greater than 2.5 mm's object to pass, guarantees that cubical switchboard external grade reaches IP 30.

As shown in fig. 6, the bottom plate 115 is disposed below the circuit breaker 10D, a plurality of ventilation grooves C5 or holes C6 are disposed on the bottom plate 115, specifically, the ventilation grooves C6 are rectangular grooves with a length of 40mmX and a width of 5mm or circular through holes C6 with a diameter of phi 5mm and a center distance of 20mmX20mm, and the added area of the ventilation grooves C5 or the holes C6 is increased by nearly 30% compared with the ventilation area of the original T-shaped grooves, thereby greatly increasing the ventilation efficiency between the upper drawer and the lower drawer.

As shown in fig. 7, the high-temperature gas in the drawer chamber 10 flows into the bus bar chamber 20 through the through hole 200 of the rear baffle 113, the through hole 400 of the partition plate 12, the ventilation groove C1 and the ventilation hole C2, and then flows out of the switch cabinet 100 through the ventilation hole 21 at the upper portion of the bus bar chamber 20, so that one-cycle convection of the high-temperature gas in the drawer chamber 10 and the low-temperature gas outside the cabinet is realized, the high-temperature gas in the drawer chamber 10 flows out of the switch cabinet 100 through the ventilation groove C3 or the hole C4 of the front baffle 112 and the low-temperature gas outside the cabinet is realized, the high-temperature gas in the drawer chamber 10 flows out of the switch cabinet 100 through the ventilation hole 21 at the top after passing through a plurality of drawers upwards through the ventilation grooves C5 or the hole C6 below the circuit breaker 10D, so that three-cycle convection of the high-temperature gas in the drawer chamber 10 and the low-temperature gas outside the cabinet are realized, and the multiple-cycle ventilation convection reduces the temperature in the drawer chamber 10, thereby improving the safety and reliability of the operation of the low-voltage complete switch cabinet 100.

In another preferred embodiment, as shown in fig. 8, a plurality of through holes 200 are provided on the partition plate 12, the partition plate 12 is composed of a partition plate 12H and a partition plate 12K, an insulating passage device 12A for power supply connection and a three-pole socket device 12B for power supply connection are provided on the partition plate 12K, a plurality of through holes 200 are further provided on the partition plate 12K, specifically, the through holes 200 are circular through holes with a diameter of phi 5mm and a center distance of 20mmX20mm, the partition plate 12H is also provided with a plurality of through holes 200, specifically, the through holes 200 are circular through holes with a diameter of phi 5mm and a center distance of 20mmX20mm, and the number or area of the through holes 200 provided on the partition plate 12H is greater than the number or area of the through holes 200 provided on the partition plate 12K.

Be provided with a plurality of through-holes 400 on the backplate 113, the backplate 113 includes baffle 113A and baffle 113B, be provided with on the baffle 113A with device 11A that the generating line 30 is electrically connected and device 11B with three-pole socket device 12B is electrically connected, baffle 113A still is provided with a plurality of through-holes 400, and is specific, through-hole 400 is diameter 5mm, and the centre-to-centre spacing is the circular through-hole of 20mmX20mm, baffle 113B also is provided with a plurality of through-holes 400, and is specific, through-hole 400 is diameter 5mm, and the centre-to-centre spacing is the circular through-hole of 20mmX20mm, the quantity or the area of the through-hole 400 that sets up on the baffle 113B are more than the quantity or the area of the through-hole 400 that set up on the baffle 113A.

In a further preferred embodiment, as shown in fig. 9, a plurality of through holes 200 are provided on the partition plate 12, the partition plate 12 includes a partition plate 12H and a partition plate 12K, an insulating passage device 12A for power supply connection and a three-pole socket device 12B for power supply connection are provided on the partition plate 12K, the partition plate 12H is provided with a plurality of through holes 200, specifically, the through holes 200 are circular through holes with a diameter of phi 5mm and a center distance of 20mmX20mm, and the partition plate 12 is provided with a plurality of through holes 200 all provided on the partition plate 12H.

Be provided with a plurality of through-holes 400 on the backplate 113, the backplate 113 comprises baffle 113A and baffle 113B, be provided with on the baffle 113A with device 11A that the generating line 30 is connected electrically and the device 11B that is connected with tripolar socket device 12B electricity, baffle 113B is provided with a plurality of through-holes 400, and is specific, through-hole 400 is diameter 5mm, and the centre-to-centre spacing is the circular through-hole of 20mmX20mm, be provided with on the backplate 113 that a plurality of through-holes 400 are all set up on the baffle 113B.

According to the low-voltage complete switch cabinet, the plurality of ventilation holes or grooves are additionally arranged on the front baffle and the rear baffle of the drawer device, the ventilation grooves on the front baffle can enable hot air in the drawer and air outside the cabinet to realize circulating convection, the ventilation holes on the rear baffle can enable the hot air in the drawer and bus chamber air at the rear part of the cabinet to realize circulating convection, and the problem of poor ventilation caused by chimney effect only in the up-and-down direction in the prior art is solved by means of measures such as enlarging the area of through holes between the drawers, realizing multiple circulating convection ventilation and the like, so that the temperature in the drawer device is reduced, and the safety and reliability of the operation of the low-voltage complete switch cabinet are improved.

The above are only some embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a low pressure complete set cubical switchboard (100), includes the cabinet body (110), cabinet front portion drawer room (10), cabinet rear portion bus-bar room (20) and generating line (30) at least, drawer room (10) include at least one drawer device (11), drawer room (10) with be provided with at least a baffle (12) between bus-bar room (20), be provided with at least three pole socket device (12B) that power supply connection used insulating passage device (12A) and power supply connection used on baffle (12) at least, its characterized in that, be provided with a plurality of through-holes (200) on baffle (12), the area that adds of a plurality of through-holes (200) is no less than 5% of baffle (12) total area.

2. A low-voltage switchgear assembly (100) as claimed in claim 1, wherein a plurality of through holes (300) are provided on two side panels (111) of said drawer device (11), at least a circuit breaker operating device (10E) and a meter device (10F) are provided on a front panel (112) of said drawer device (11), at least a device (11A) electrically connected to said bus bar (30) and a device (11B) connected to said socket device (12B) are provided on a rear panel (113) of said drawer device (11), said rear panel (113) is provided with a plurality of through holes (400), and the sum of said plurality of through holes (400) is not less than 5% of the total area of said rear panel (113).

3. The switchgear cabinet (100) as claimed in claim 2, wherein said plurality of through holes (200) provided in said partition (12) are aligned with or staggered with respect to said plurality of through holes (400) provided in said back plate (113).

4. Low voltage switchgear cabinet assembly (100) according to claim 2, wherein ventilation slots (C1) or holes (C2) are provided around and/or in any of the insulating channel means (12A), the outlet means (12B), the means (11A) for electrical connection to the busbar (30) and the means (11B) for connection to the outlet means (12B).

5. Low-voltage switchgear assembly (100) according to claim 2, characterized in that at least a circuit breaker operating device (10E) and/or a meter device (10F) are provided on the front panel (112) of the drawer device (11), and ventilation slots (C3) or holes (C4) are left around the circuit breaker operating device (10E) and the meter device (10F).

6. Low-voltage switchgear cabinet kit (100) according to claim 1, characterized in that a circuit breaker (10D) is arranged in the drawer arrangement (11), and the floor (115) of the drawer arrangement (11) below the circuit breaker (10D) is provided with a plurality of ventilation slots (C5) and/or holes (C6).

7. Low-voltage switchgear assembly (100) according to claim 4, characterized in that the combined area of the ventilation slot (C1) and the aperture (C2) is not included in the area of the through-hole (200) or the through-hole (400).

8. Low-voltage switchgear cabinet set (100) according to claim 5, characterized in that said through holes (200) and (400) do not let through objects with a diameter greater than 12.5mm, and said ventilation slots (C3) or holes (C4) do not let through objects with a diameter greater than 2.5 mm.

9. Low-voltage switchgear assembly (100) according to claim 2, characterized in that said rear panel (113) comprises at least one panel.

10. The low-voltage switchgear assembly (100) as claimed in claim 9, wherein the rear panel (113) comprises a panel (113A) and a panel (113B), and the number or area of the through holes (400) formed in the panel (113B) is greater than the number or area of the through holes (400) formed in the panel (113A).

11. A low-voltage switchgear assembly (100) according to claim 9, wherein said rear panel (113) comprises a panel (113A) and a panel (113B), said through holes (400) being entirely provided in said panel (113B).

12. Low-voltage switchgear assembly (100) according to claim 1, characterized in that said partition (12) comprises at least one partition.

13. The low-voltage switchgear assembly (100) as claimed in claim 12, wherein the partition (12) comprises a partition (12K) and a partition (12H), and the number or area of the through holes (200) provided in the partition (12H) is greater than the number or area of the through holes (200) provided in the partition (12K).

14. Low-voltage switchgear assembly (100) according to claim 12, characterized in that said partition (12) comprises a partition (12K) and a partition (12H), said through holes (200) being all provided on said partition (12H).