CN202906205U - A positive-pressure explosion-proof power distribution cabinet - Google Patents
A positive-pressure explosion-proof power distribution cabinet Download PDFInfo
- Publication number
- CN202906205U CN202906205U CN 201220590217 CN201220590217U CN202906205U CN 202906205 U CN202906205 U CN 202906205U CN 201220590217 CN201220590217 CN 201220590217 CN 201220590217 U CN201220590217 U CN 201220590217U CN 202906205 U CN202906205 U CN 202906205U
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- valve
- main chamber
- power distribution
- air inlet
- air
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- Expired - Fee Related
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Abstract
Provided is a positive-pressure explosion-proof power distribution cabinet which mainly resolves a problem of frequent start and stop of an air incoming solenoid valve, an air supplementing solenoid valve, and an air exhausting solenoid valve of a present positive-pressure explosion-proof power distribution cabinet is the using process. The positive-pressure explosion-proof power distribution cabinet is characterized in that an air incoming pipe (3) is equipped with a manual air inlet valve (8) and an adjusting flowmeter (9), that the manual air inlet valve (8) is connected with the adjusting flowmeter (9) in parallel and then is connected with an air incoming solenoid valve (5) and an air supplementing solenoid valve (6) in parallel, that an air exhausting pipe (4) is equipped with a manual air outlet valve (10), and that the manual air outlet valve (10) is connected with an air exhausting solenoid valve (7) in parallel. The positive-pressure explosion-proof power distribution cabinet effectively prevents frequent start and stop of the air incoming solenoid valve, the air supplementing solenoid valve, and the air exhausting solenoid valve.
Description
Technical field
The utility model relates to the power distribution cabinet that a kind of explosive hazardous area mounting electrical element, automatic instrument(s) are used, and is specifically related to a kind of positive pressure type explosion-proof power distribution cabinet.
Background technology
The explosion-proof principle of positive pressure type explosion-proof power distribution cabinet mainly is to adopt the explosion precaution of medium isolation ignition source, the all electric elements of user are installed in the housing that is full of the clean medium of pressure, make mixed gases inflammable and explosive in the external environment condition can't touch electric spark or dangerous temperature that electric elements produce when normal operation, thereby reach the explosion-proof purpose of electrical equipment.Existing positive pressure type explosion-proof power distribution cabinet mainly is comprised of main chamber and secondary cavity, and the required electric elements of user are installed in the main chamber, and air-channel system, air filtration decompression (pressure regulation) system, ventilating system and automatic control system etc. are installed in the secondary cavity; Main chamber is pure air or the inert gas of 0.4MPa～0.7Mpa for chamber and its interior charged pressure of sealing, and main chamber is the malleation chamber.Air-channel system comprises air inlet pipe and the blast pipe that communicates with main chamber, air inlet electromagnetic valve and tonifying Qi electromagnetically operated valve have been installed in parallel on the air inlet pipe, exhaust solenoid valve is installed on the blast pipe, when normal operation, when inner with the extraneous pressure reduction of main chamber is lower than 100Pa, automatic control system is set immediately and is reported to the police, and indicator light is bright, simultaneously explosion-proof electric bell caution; When inner with the extraneous pressure reduction of main chamber is lower than 50Pa, in time cut off working power in the main chamber by automatic controlling system, avoid electric equipment under dangerous situation, to move, when inner with the extraneous pressure reduction of main chamber is higher than 500Pa, the autoshutdown air inlet electromagnetic valve; If air pressure hinders rising for some reason, during greater than 1000Pa, main chamber is provided with the timely exhaust of mechanical emergency valve, guarantees cabinet safety.In order to guarantee that contained gas is pure air or inert gas in the main chamber, need in use to take a breath, pressurize and tonifying Qi operation, because the pressure in the main chamber mainly is by air inlet electromagnetic valve and tonifying Qi electromagnetically operated valve air inlet control, controlled by the exhaust solenoid valve exhaust, in use the pressure in the main chamber is lower than the startup of 100Pa tonifying Qi electromagnetically operated valve, the beginning tonifying Qi; Pressure in the main chamber is greater than or equal to 500Pa tonifying Qi electromagnetically operated valve to be stopped, and stops tonifying Qi, ventilation and tonifying Qi process caused air inlet electromagnetic valve, tonifying Qi electromagnetically operated valve and exhaust solenoid valve frequent starting, stop, lacking useful life, be prone to fault and have an accident.
The utility model content
In use can cause the frequent starting of air inlet electromagnetic valve, tonifying Qi electromagnetically operated valve and exhaust solenoid valve, the deficiency that stops in order to overcome existing positive pressure type explosion-proof power distribution cabinet, the utility model provides a kind of positive pressure type explosion-proof power distribution cabinet, this positive pressure type explosion-proof power distribution cabinet effectively avoided air inlet electromagnetic valve, tonifying Qi electromagnetically operated valve and exhaust solenoid valve frequent starting, stop.
The technical solution of the utility model is: this positive pressure type explosion-proof power distribution cabinet comprises main chamber and secondary cavity, main chamber is the chamber of sealing, be provided with air inlet pipe and the blast pipe of the main chamber that communicates in the secondary cavity, air inlet electromagnetic valve and tonifying Qi electromagnetically operated valve have been installed in parallel on the air inlet pipe, exhaust solenoid valve is installed on the blast pipe, manual intake valve and adjust flux meter are installed on the air inlet pipe, manually intake valve be in parallel with air inlet electromagnetic valve, tonifying Qi electromagnetically operated valve again after the adjust flux meter is in parallel; Manual exhaust valve is installed on the blast pipe, and manual exhaust valve is in parallel with exhaust solenoid valve.
Described air inlet pipe is provided with pressure-regulating valve, pneumatic filter and Pressure gauge.
Described main chamber is provided with mechanical emergency valve.
Described blast pipe is provided with the anti-explosion fire-retardant Ventilated cap.
Described blast pipe is provided with flow controller, the pure air in the flow controller control main chamber or the flow of inert gas, if flow is undesirable, the circuit in the main chamber can not be switched on.
The utlity model has following beneficial effect: owing to take such scheme, owing to increased manual intake valve, manual exhaust valve and adjust flux meter, when malleation cabinet pneumatic system ventilation flow 〉=8m/h, can put into operation, beginning to arrange 30 minutes time of exchanging gas (mixes up, if time of exchanging gas is inadequate, can arbitrarily adjust, but minimum time must not be less than 30 minutes, after 30 minutes, before switch transition is controlled gear automatically, turn down immediately manual exhaust valve, (otherwise the excessive damage micromanometer of inlet pressure), regulate simultaneously inlet pressure adjusting valve, after air inflow is controlled at minimum zone, at this moment close manual exhaust valve, again regulate the air inflow of manual air inlet ball valve, after the adjustable flow meter makes it air inflow and rises to 400Pa～450Pa, can stop the adjustment of manual intake valve, that is to say, malleation cabinet main chamber tiny leakage gas flow just in time equals the air inflow of manual intake valve and the adjustment of adjustable flow meter, at this moment just think relative equilibrium, can guarantee that the relative surrounding environment gas differential pressure of gas differential pressure in the main chamber is 350Pa～450Pa, reaching leakage flow equates with flow of air supply, drop into the rear air inlet electromagnetic valve of automatically operation, tonifying Qi electromagnetically operated valve and exhaust solenoid valve all are in the outage closed condition, have effectively avoided air inlet electromagnetic valve, the frequent starting of tonifying Qi electromagnetically operated valve and exhaust solenoid valve, stop.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model.
1-main chamber among the figure, 2-secondary cavity, 3-air inlet pipe, the 4-blast pipe, 5-air inlet electromagnetic valve, 6-tonifying Qi electromagnetically operated valve, the 7-exhaust solenoid valve, the manual intake valve of 8-, 9-adjust flux meter, the 10-manual exhaust valve, 11-pressure-regulating valve, 12-machinery emergency valve, the 13-pneumatic filter, the 14-Pressure gauge, 15-anti-explosion fire-retardant Ventilated cap, 16-flow controller.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
By shown in Figure 1, this positive pressure type explosion-proof power distribution cabinet comprises main chamber 1 and secondary cavity 2, main chamber 1 is the chamber of sealing, be provided with air inlet pipe 3 and the blast pipe 4 of the main chamber 1 that communicates in the secondary cavity 2, air inlet electromagnetic valve 5 and tonifying Qi electromagnetically operated valve 6 have been installed in parallel on the air inlet pipe 3, exhaust solenoid valve 7 is installed on the blast pipe 4, manual intake valve 8 and adjust flux meter 9 are installed on the air inlet pipe 3, manually intake valve 8 and adjust flux meter 9 are in parallel with air inlet electromagnetic valve 5, tonifying Qi electromagnetically operated valve 6 again after in parallel; Manual exhaust valve 10 is installed on the blast pipe 4, and manual exhaust valve 10 is in parallel with exhaust solenoid valve 7.Owing to increased manual intake valve 8, manual exhaust valve 10 and adjust flux meter 9, when malleation cabinet pneumatic system ventilation flow 〉=8m/h, can put into operation, beginning to arrange 30 minutes time of exchanging gas (mixes up, if time of exchanging gas is inadequate, can arbitrarily adjust, but minimum time must not be less than 30 minutes, after 30 minutes, before switch transition is controlled gear automatically, turn down immediately manual exhaust valve 10, (otherwise the excessive damage micromanometer of inlet pressure), regulate simultaneously inlet pressure adjusting valve 11, after air inflow is controlled at minimum zone, at this moment close manual exhaust valve 10, again regulate the air inflow of manual air inlet ball valve 8, after adjustable flow meter 9 makes it air inflow rising 400-450Pa, can stop the adjustment of manual intake valve 8, that is to say, malleation cabinet main chamber 1 tiny leakage gas flow just in time equals the air inflow of manual intake valve 8 and 9 adjustment of adjustable flow meter, at this moment just think relative equilibrium, can guarantee that the relative surrounding environment gas differential pressure of gas differential pressure in the main chamber 1 is 350Pa～450Pa, reaching leakage flow equates with flow of air supply, drop into the rear air inlet electromagnetic valve 5 of automatically operation, tonifying Qi electromagnetically operated valve 6 and exhaust solenoid valve 7 all are in the outage closed condition, have effectively avoided air inlet electromagnetic valve 5, the frequent starting of tonifying Qi electromagnetically operated valve 6 and exhaust solenoid valve 7, stop.
By shown in Figure 1, described air inlet pipe 3 is provided with pressure-regulating valve 11, pneumatic filter 13 and Pressure gauge 14.Can control like this pure air in the main chamber 1 or the pressure of inert gas, guarantee that the gas in the main chamber 1 reaches the requirement of clean gas substantially, see intuitively force value in the main chamber 1 from the Pressure gauge 14 regulating manual intake valve 8.
By shown in Figure 1, described main chamber 1 is provided with mechanical emergency valve 12.If the air pressure in the main chamber 1 hinders rising for some reason, during greater than 1000Pa, by mechanical emergency valve 12 timely exhausts, guarantee cabinet safety.
By shown in Figure 1, described blast pipe 4 is provided with anti-explosion fire-retardant Ventilated cap 15.The dangerous grit of fatal atmosphere band of avoiding cementing out discharges on the spot.Avoid red-hot, fiery dirt particle to enter the hazardous area, cause contingency, guarantee safety.
By shown in Figure 1, described blast pipe 4 is provided with flow controller 16, the pure air in the flow controller 16 control main chamber 1 or the flow of inert gas, if flow is undesirable, the circuit in the main chamber 1 can not be switched on.The flow of the pure air in the control displacement main chamber 1 or inert gas can guarantee that the gas in the main chamber 1 reaches the requirement of clean gas substantially like this.
Claims (5)
1. positive pressure type explosion-proof power distribution cabinet, comprise main chamber (1) and secondary cavity (2), main chamber (1) is the chamber of sealing, be provided with air inlet pipe (3) and the blast pipe (4) of the main chamber that communicates (1) in the secondary cavity (2), air inlet electromagnetic valve (5) and tonifying Qi electromagnetically operated valve (6) have been installed in parallel on the air inlet pipe (3), exhaust solenoid valve (7) is installed on the blast pipe (4), it is characterized in that: manual intake valve (8) and adjust flux meter (9) are installed on the air inlet pipe (3), manually intake valve (8) with after adjust flux meter (9) is in parallel again with air inlet electromagnetic valve (5), tonifying Qi electromagnetically operated valve (6) is in parallel; Manual exhaust valve (10) is installed on the blast pipe (4), and manual exhaust valve (10) is in parallel with exhaust solenoid valve (7).
2. positive pressure type explosion-proof power distribution cabinet according to claim 1, it is characterized in that: described air inlet pipe (3) is provided with pressure-regulating valve (11), pneumatic filter (13) and Pressure gauge (14).
3. positive pressure type explosion-proof power distribution cabinet according to claim 1 and 2, it is characterized in that: main chamber (1) is provided with mechanical emergency valve (12).
4. positive pressure type explosion-proof power distribution cabinet according to claim 1 and 2, it is characterized in that: described blast pipe (4) is provided with anti-explosion fire-retardant Ventilated cap (15).
5. positive pressure type explosion-proof power distribution cabinet according to claim 1 and 2, it is characterized in that: described blast pipe (4) is provided with flow controller (16), pure air in flow controller (16) the control main chamber (1) or the flow of inert gas, if flow is undesirable, the circuit in the main chamber (1) can not be switched on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220590217 CN202906205U (en) | 2012-11-09 | 2012-11-09 | A positive-pressure explosion-proof power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220590217 CN202906205U (en) | 2012-11-09 | 2012-11-09 | A positive-pressure explosion-proof power distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906205U true CN202906205U (en) | 2013-04-24 |
Family
ID=48126831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220590217 Expired - Fee Related CN202906205U (en) | 2012-11-09 | 2012-11-09 | A positive-pressure explosion-proof power distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202906205U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305275A (en) * | 2014-05-30 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Double-box type substation |
| CN105807819A (en) * | 2014-12-31 | 2016-07-27 | 长春北方化工灌装设备有限公司 | High-capacity, explosion-proof and positive-pressure cabinet having self-cooling function |
| CN108758344A (en) * | 2018-05-31 | 2018-11-06 | 二工防爆科技股份有限公司 | A kind of exhaust apparatus for explosion-proof positive pressure cabinet |
| CN108770246A (en) * | 2018-05-31 | 2018-11-06 | 二工防爆科技股份有限公司 | A kind of explosion-proof positive pressure cabinet of intelligent micro-pressure |
| CN113198650A (en) * | 2021-05-25 | 2021-08-03 | 伯朗特机器人股份有限公司 | Spraying robot and positive pressure explosion-proof method thereof |
-
2012
- 2012-11-09 CN CN 201220590217 patent/CN202906205U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305275A (en) * | 2014-05-30 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Double-box type substation |
| CN105305275B (en) * | 2014-05-30 | 2017-06-06 | 国网山西省电力公司电力科学研究院 | A kind of binary box-type substation |
| CN105807819A (en) * | 2014-12-31 | 2016-07-27 | 长春北方化工灌装设备有限公司 | High-capacity, explosion-proof and positive-pressure cabinet having self-cooling function |
| CN108758344A (en) * | 2018-05-31 | 2018-11-06 | 二工防爆科技股份有限公司 | A kind of exhaust apparatus for explosion-proof positive pressure cabinet |
| CN108770246A (en) * | 2018-05-31 | 2018-11-06 | 二工防爆科技股份有限公司 | A kind of explosion-proof positive pressure cabinet of intelligent micro-pressure |
| CN108758344B (en) * | 2018-05-31 | 2020-03-27 | 二工防爆科技股份有限公司 | Exhaust device for explosion-proof positive pressure cabinet |
| CN108770246B (en) * | 2018-05-31 | 2020-05-19 | 二工防爆科技股份有限公司 | Explosion-proof malleation cabinet of intelligence minute-pressure |
| CN113198650A (en) * | 2021-05-25 | 2021-08-03 | 伯朗特机器人股份有限公司 | Spraying robot and positive pressure explosion-proof method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20141109 |
|
| EXPY | Termination of patent right or utility model |