CN203351983U - Low-voltage switch cabinet having automatic pressure relieving function - Google Patents
Low-voltage switch cabinet having automatic pressure relieving function Download PDFInfo
- Publication number
- CN203351983U CN203351983U CN 201320373638 CN201320373638U CN203351983U CN 203351983 U CN203351983 U CN 203351983U CN 201320373638 CN201320373638 CN 201320373638 CN 201320373638 U CN201320373638 U CN 201320373638U CN 203351983 U CN203351983 U CN 203351983U
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- Prior art keywords
- cabinet
- free end
- switch cabinet
- low
- pressure relieving
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- Expired - Lifetime
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Abstract
The utility model discloses a low-voltage switch cabinet having the automatic pressure relieving function. The low-voltage switch cabinet comprises a cabinet body. The top of the cabinet is provided with a rear head cover plate and a front head cover plate which are fixed onto the cabinet body frame through set screws. The front head cover plate and the rear head cover plate are provided with a pressure relieving device respectively. Each pressure relieving device is provided with corresponding pressure relieving openings and sealed through a sealing plate, wherein one end of the sealing plate is fastened through a screw, the opposite end is a free end, and at least one transverse elongated hole or groove is formed between the set screw and the free end. Alternatively, the free end of the sealing plate is pressed and fixed through a pressing plate, wherein one end of the pressing plate is fastened through a screw, the opposite end is a pressing and sealing end which is a free end, and at least one transverse elongated hole or groove is formed between the set screw and the free end. The pressure relieving openings are arranged on the front head cover plate and the rear head cover plate at positions corresponding to front and rear compartments. According to the utility model, when an internal combustion arc fault occurs in the switch cabinet, the generated high-pressure and high-temperature gas can be relieved timely through the pressure relieving openings so as to effectively limit the further upgrade of the internal combustion arc fault (which will lead to serious heat effect).
Description
Technical field
The utility model relates to a kind of low-tension switch cabinet, especially relates to a kind of low-tension switch cabinet that has the releasing pressure automatically function when internal fault generation arcing.
Background technology
In switchgear, internal fault arcing accident seldom occurs, but can not avoid fully.Once it occurs, and will cause great harm to the person and equipment.Fault electric arc can form high pressure and high temperature within very short time.In the low voltage switchgear in sealing, fault electric arc can be elevated to 13000K by temperature in 10ms, in about 15ms, pressure rise is arrived to approximately 2 * 105Pa～3 * 105Pa simultaneously.Parts (as door) in equipment the high pressure effect under can break away from their fixed mechanism and be raised.High temperature also produces fusing and evaporation process in equipment.Result produces poison gas, and poison gas discharges again under pressure.These gases are near staff, with regard to lived danger.More situation is burned skin and makes the people dizzy.Except personal injury, also have the damage of equipment, as the switchgear in building and the secondary part partly or wholly destroyed.Even destructive process is through with, the user also will bear when long and stop production and high accident treatment expense.Therefore, the harm of understanding fault electric arc is also protected, and is the common responsibility of the departments such as switchgear design, manufacture and operation.Existing low-tension switch cabinet is all generally closed but has the cabinet of Qianmen, back door (rear shrouding) and functional unit door, and cabinet is provided with trip bolt and is fixed on back header plate, the front tectal lamina on cabinet body frame.
The utility model content
Technical problem to be solved in the utility model, just be to provide a kind of low-tension switch cabinet with releasing pressure automatically function that can effectively limit the further upgrading of interior arcing fault.
Solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of low-tension switch cabinet with releasing pressure automatically function, comprise cabinet, described cabinet cabinet top is provided with trip bolt and is fixed on back header plate and the front tectal lamina on cabinet body frame, it is characterized in that: described forward and backward lamina tecti is provided with pressure relief device: have corresponding pressure relief opening and sealed with shrouding, one end screw fastening of described shrouding, opposite end is free end, is provided with at least one horizontal elongated hole or groove between hold-down screw and free end.
The free end of described shrouding is fixed by pressing plate, an end screw fastening of described pressing plate, and opposite end is that press seal plate end is free end, is provided with at least one horizontal elongated hole or groove between hold-down screw and free end.
The position of described elongated slot or slotted hole is near the inboard of screw mounting hole.
Described pressure relief opening is located on the position of corresponding front and back compartment on the lamina tecti of front and back.
Beneficial effect: the utility model increases a pressure relief opening by the top at switch cubicle, the high pressure-temperature gas produced during the arcing fault in occurring in switch cubicle can carry out the release of pressure in time by this pressure relief opening, can effectively limit the further upgrading (causing serious thermal effect) of interior arcing fault.
This is simple in structure safe and scientific reliable, for the making of switch cubicle, does not increase great cost.After using this utility model by above-mentioned improvement, when inside switch cabinet generation arcing fault, high temperature and high pressure gas can be washed the lamina tecti shrouding rapidly open, thereby makes the inner air pressure that continues to rise of cabinet obtain discharging timely.The fundamentally further upgrading of arcing fault in the restriction, this device is by the checking of the interior arcing Test to Failure of test institute, and whole structure is good, can reach the purpose of expection.
The accompanying drawing explanation
Fig. 1 is front view of the present utility model;
Fig. 2 is left view of the present utility model;
Fig. 3 is right view of the present utility model;
Fig. 4 is vertical view of the present utility model;
Fig. 5 is shrouding pressure plate structure schematic diagram;
The state diagram of Fig. 6 during for arcing fault in the cup of switch cubicle or the generation of rear chamber.
In figure: 1-cabinet, 2-back door, 3-functional unit door, 4-front tectal lamina, 5-back header plate, 6-side seal board, 7-pressing plate, 8-shrouding, 9-entrance pressure mouth, 10-technique elongated slot.
Embodiment
Below in conjunction with drawings and embodiments, the utility model is further illustrated.
As shown in Figures 1 to 4, low-tension switch cabinet embodiment with releasing pressure automatically function of the present utility model, comprise and have Qianmen, shrouding after the 2(of back door) and the cabinet 1 of functional unit door 3, cabinet 1 is provided with trip bolt and is fixed on back header plate 5 and the front tectal lamina 4 on the upper cabinet body frame in cabinet top, before, back header plate 4, 5 are provided with pressure relief device, the concrete structure of pressure relief device is: have corresponding pressure relief opening, and sealed with shrouding 7, one end screw fastening of shrouding 7, opposite end is free end, be provided with at least one horizontal elongated hole or groove between hold-down screw and free end, the free end of shrouding is fixed by pressing plate 8, an end screw fastening of pressing plate, and opposite end is that press seal plate end is free end, is provided with at least one horizontal elongated hole or groove between hold-down screw and free end.
Rear door of switch cabinet 2 and several functional unit doors 3 have been installed on cabinet 1, have been separated with side seal board 9 between switch cubicle, the degree of protection of the front and back lamina tecti 4,5 on the cabinet top is IP4X.These parts have just formed the low-tension switch cabinet of a group enclosed construction.Before and after corresponding on front and back lamina tecti 4,5 on the position of compartment punching corresponding pressure relief opening, pressure relief opening is sealed with shrouding 8, one end of shrouding 8 carries out fastening with screw, opposite end is by being fixed with pressing plate 7, technique elongated slot or the slotted hole of shrouding 8 and pressing plate 7 equal punching somes, the position of elongated slot or slotted hole is near the inboard of screw mounting hole, and the process structure of these two kinds of parts is shown in Fig. 5,6.
Referring to Fig. 7, in the cup of switch cubicle or rear chamber occur during the arcing fault, the gases at high pressure that moment produces expand rapidly in cabinet, in this case, usually be all that the weakest place is first destroyed or raise, because pressing plate 7 and shrouding 8 all only have an end screw fastening, when gases at high pressure are oppressed to shrouding 8, shrouding 8 not by a fully fastening end can be rapidly pressing plate 7 toward extrapolation because pressing plate 7 and shrouding 8 all punching corresponding technique sulculus, when being subject to impacting with high pressure, can both open outward easily, shrouding 8 also can continue because of the inertia that gases at high pressure impact toward turning up, until translate into maximum deformation limit, now the high temperature and high pressure gas in cabinet has obtained discharging timely, thereby limited the further upgrading of interior arcing fault, this low-tension switch cabinet is by the checking of the interior arcing Test to Failure of test institute, whole structure is good, can reach the purpose of expection.This utility model is economical thus, and simple and safe science is reliable.
The present embodiment is with pressing plate, and what with pressing plate, only do not have shrouding to have a pressure relief opening also can the technical solution problem, and structure is all the same, just repeats no more here.
Claims (5)
1. the low-tension switch cabinet with releasing pressure automatically function, comprise cabinet, described cabinet cabinet top is provided with trip bolt and is fixed on back header plate and the front tectal lamina on cabinet body frame, it is characterized in that: described forward and backward lamina tecti is provided with pressure relief device: have corresponding pressure relief opening and sealed with shrouding, one end screw fastening of described shrouding, another opposite end is free end, is provided with at least one horizontal elongated hole or groove between hold-down screw and free end.
2. the low-tension switch cabinet with releasing pressure automatically function according to claim 1, it is characterized in that: the free end of described shrouding is fixed by pressing plate, one end screw fastening of described pressing plate, another opposite end is that press seal plate end is free end, is provided with at least one horizontal elongated hole or groove between hold-down screw and free end.
3. the low-tension switch cabinet with releasing pressure automatically function according to claim 1 and 2, it is characterized in that: the position of described elongated slot or slotted hole is near the inboard of screw mounting hole.
4. the low-tension switch cabinet with releasing pressure automatically function according to claim 1 and 2, it is characterized in that: described pressure relief opening is located on the position of corresponding forward and backward compartment on forward and backward lamina tecti.
5. the low-tension switch cabinet with releasing pressure automatically function according to claim 3, it is characterized in that: described pressure relief opening is located on the position of corresponding forward and backward compartment on forward and backward lamina tecti.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320373638 CN203351983U (en) | 2013-06-26 | 2013-06-26 | Low-voltage switch cabinet having automatic pressure relieving function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320373638 CN203351983U (en) | 2013-06-26 | 2013-06-26 | Low-voltage switch cabinet having automatic pressure relieving function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203351983U true CN203351983U (en) | 2013-12-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320373638 Expired - Lifetime CN203351983U (en) | 2013-06-26 | 2013-06-26 | Low-voltage switch cabinet having automatic pressure relieving function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203351983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229879A (en) * | 2016-09-14 | 2016-12-14 | 许继集团有限公司 | The substrate of switch cubicle, pressure relief device and pressure relief device and shrouding |
-
2013
- 2013-06-26 CN CN 201320373638 patent/CN203351983U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229879A (en) * | 2016-09-14 | 2016-12-14 | 许继集团有限公司 | The substrate of switch cubicle, pressure relief device and pressure relief device and shrouding |
| CN106229879B (en) * | 2016-09-14 | 2019-05-17 | 许继集团有限公司 | The substrate and sealing plate of switchgear, pressure relief device and pressure relief device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |