CN85205165U - Explosion protection, dust proof and moisture proof cabinet for low voltage electric appliances - Google Patents
Explosion protection, dust proof and moisture proof cabinet for low voltage electric appliances Download PDFInfo
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- CN85205165U CN85205165U CN 85205165 CN85205165U CN85205165U CN 85205165 U CN85205165 U CN 85205165U CN 85205165 CN85205165 CN 85205165 CN 85205165 U CN85205165 U CN 85205165U CN 85205165 U CN85205165 U CN 85205165U
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- cabinet
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- low voltage
- voltage electric
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Abstract
Disclosed is an explosion proof, dust proof and moisture proof novel cabinet for low voltage electric appliances, and the utility model has the advantages of simple structure and convenient use. The utility model is characterized in that a low voltage electric appliance is fixed in a sealed cabinet body; A gas source with a gas valve fills pressurized safe gas in the cabinet via the gas valve to make the air pressure in the cabinet higher than the air pressure outside constantly. An air pressure regulating relay is arranged in a circuit in the cabinet to cut the circuit in time when air leak happens in the cabinet body to make the air pressure in the cabinet too low.
Description
The utility model be a kind of can be explosive, carry out novel electrical installation---the low-voltage electrical cabinet of work in many dust, the malaria environment safely and reliably.
In the production process of industrial departments such as coal, oil, weaving, chemistry, can produce flammable explosion hazard gases (or dust).The air of this class production unit often has flammable explosion hazard gases or dust to have explosivity because of mixing, and promptly heavy explosion takes place and causes a serious accident in case lighted by naked light; Be in the electric spark that the electric equipment of working in the above-mentioned environment produces and also can cause this class explosion accident in running.Generally speaking, Wai Jie flammable explosion hazard gases can infiltrate electric equipment inside by the slit of electrical equipment shell; Electric equipment is in running as superheating phenomenon takes place, and decomposites flammable explosion hazard gases in insulating oil that also can be from electric equipment and other organic insulation substrate.So, in case electric equipment produces electric spark, the damp of enclosure just may be detonated, and also might ignite the flammable explosion hazard gases of space outerpace simultaneously and causes disaster.
Generation for fear of above-mentioned disaster accident, be in the electrical equipment of working in the flammable explosive atmosphere, its shell must have explosion-proof, the present explosion-proof electric apparatus that uses, its shell all stipulates to have anti-quick-fried property, and promptly in case in the inner generation of electrical equipment gas burst, electric appliance casing must not ftracture, clearly this shell must use the high-strength material manufacturing, and needs thickening.Abundant shell makes the compact electric apparatus cabinet become heavy, and large electric appliances equipment becomes heavy more and is difficult to move, and has promptly wasted material inconvenience use again.
In addition, the electrical equipment of working in explosive environments is often also because of the invasion and attack that suffer humid air and dust cause the element corrosion, makes the decreasing insulating of electrical equipment might cause the equipment short circuit, the corresponding danger that has increased blast.Therefore, a kind of safely and reliably explosive, the electrical equipment of working in moist and many dust atmospheres is current the urgent need.
The low-voltage electrical cabinet of (explosion-proof, dustproof, protection against the tide) performance that the utility model provides a kind of to have " three is anti-", and simple in structure, dependable performance, easy to use.
The utility model is to realize like this, low-voltage electrical apparatus (being generally used for 380 volts or 660 volts of circuit) is placed the casing of sealing, use a small-sized source of the gas (for example gas cylinder of 1 liter) that has air valve simultaneously, the fail safe gas (not having blast, flammable, combustion-supporting, corrosive chemically inactive gas) of pressurization is provided in casing by air valve.The effect of air valve is to make the air pressure in the cabinet keep a certain force value that is higher than external pressure consistently.The gas pressure regulating relay is housed in the circuit in cabinet, can comes the connection and the cut-out of control circuit according to the air pressure change in the cabinet.Above-mentioned compressed air source unit cabinet inside and outside all can, device is convenient in cabinet outside change.
After in low-voltage electrical apparatus places the cabinet that causes envelope,,, played " three is anti-" effect so stoped the intrusion of outside flammable explosion hazard gases, dust, moisture fully because the air pressure that source of the gas provides is higher than external atmospheric pressure.Even the electric equipment once in a while in the cabinet decomposites flammable explosion hazard gases because the overheated insulating material that makes takes place, but, do not have combustion-supporting property, still can suppress blast because envelope filled what go into is fail safe gas.In case cabinet leaks gas and causes cabinet internal gas pressure deficiency, gas pressure regulating relay promptly to cut off circuit, thereby eliminate explosion hazard.Meanwhile, the staff can find the out-of-control condition of low-voltage electrical cabinet immediately, in time takes reclamation activities or other countermeasure.Therefore, this novel low-voltage electrical cabinet shell need not be made and the thickening processing of special material.
The advantage of this " three is anti-" low-voltage electrical apparatus case is: easily manufactured, the ordinary maintenance maintenance is simple and easy to do.Existing general low-voltage electrical cabinet also can repack into comparalive ease with reference to the principle of above narration has " three is anti-" performance.Cost is all quite cheap.
" three anti-" low-voltage electrical cabinet is used in the distribution work of equipment such as the water pump that needs to take " three is anti-" measure in the production scene, winch.
Be an application example of " three is anti-" low-voltage electrical cabinet below:
Accompanying drawing is the front (office is cutd open) of this Electric Appliance Cabinet of expression.
Wherein 1 is the cabinet shell, liner air-tight membrane bag 9, the gas cylinder 8 of band air valve, numerical value.The gas cylinder (8) of liner air-tight membrane bag (9), band air valve and High-Voltage Electrical Appliances (10) (signal is not specifically drawn) are enclosed in the bag film, and the bag film seal form can adopt glue envelope or press seal, take apart along seam during maintenance electrical equipment.(2), (3) each part also encloses in the bag film, so bag film should be transparent.(4) be the parameter selector switch of digital display board, (5) are push-button switch.(4), (5) each part places outside the bag film circuit in bag film.For alleviating the wearing and tearing of film, also can adopt not must pressure can work the Contact Sensor switch.(6) be cabinet door (side is opened) handle.(7) be the Electric Appliance Cabinet starting handle, this handle also must place in the film, so bag film must be made the projection that adapts with handle shape when making in advance.
Claims (1)
1, a kind of low-voltage electrical cabinet that can be explosion-proof, dustproof, moistureproof is characterized in that:
A, low-voltage electrical apparatus device charge into the fail safe gas of pressurization in cabinet by the source of the gas of a band air valve among the cabinet of a sealing.
In the circuit gas pressure regulating relay is housed in b, the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205165 CN85205165U (en) | 1985-12-03 | 1985-12-03 | Explosion protection, dust proof and moisture proof cabinet for low voltage electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205165 CN85205165U (en) | 1985-12-03 | 1985-12-03 | Explosion protection, dust proof and moisture proof cabinet for low voltage electric appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85205165U true CN85205165U (en) | 1986-12-03 |
Family
ID=4800301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85205165 Ceased CN85205165U (en) | 1985-12-03 | 1985-12-03 | Explosion protection, dust proof and moisture proof cabinet for low voltage electric appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85205165U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455393A (en) * | 2016-08-31 | 2017-02-22 | 王轶珂 | ''Three without'' explosion prevention method for explosion-proof cabinet of electric equipment |
| CN107065958A (en) * | 2017-05-27 | 2017-08-18 | 深圳市禾望电气股份有限公司 | A kind of current transformer and its dehumanization method |
-
1985
- 1985-12-03 CN CN 85205165 patent/CN85205165U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455393A (en) * | 2016-08-31 | 2017-02-22 | 王轶珂 | ''Three without'' explosion prevention method for explosion-proof cabinet of electric equipment |
| CN107065958A (en) * | 2017-05-27 | 2017-08-18 | 深圳市禾望电气股份有限公司 | A kind of current transformer and its dehumanization method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right | ||
| CE01 | Termination of patent right |