CN202943055U - Motor positive pressure purging control device - Google Patents
Motor positive pressure purging control device Download PDFInfo
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- CN202943055U CN202943055U CN 201220667121 CN201220667121U CN202943055U CN 202943055 U CN202943055 U CN 202943055U CN 201220667121 CN201220667121 CN 201220667121 CN 201220667121 U CN201220667121 U CN 201220667121U CN 202943055 U CN202943055 U CN 202943055U
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Abstract
The utility model relates to a motor positive pressure purging control device. The motor positive pressure purging control device comprises a pneumatic sensing controller, a pneumatic timer and a blow down valve, which are mounted in a pneumatic control box, and further comprises a safety exhaust device mounted on an explosion-proof motor outer casing; and the motor positive pressure purging control device is used for pre-purging before starting an explosion-proof motor and maintaining positive pressure during the running process, and can achieve the effect of total replacement of inflammable gas in a motor and keeping the positive pressure all the time during the running process. The motor positive pressure purging control device has the advantages that the device has a comprehensive function of purging and positive pressure maintaining, and can automatically adjust the compensation flow to reach pressure balance and stability; the structure is compact, safe and reliable, consists of pneumatic elements only and does not have any active electrical element; and the requirement of explosion prevention can be met.
Description
Technical field
The utility model belongs to the fire-proof motor blow device, relates in particular to a kind of motor malleation and purges control device.
Background technology
Have that fire-proof motor that the gas explosion danger occasion uses and explosion-proof electric apparatus can adopt positive pressure air to carry out internal sweep usually, the gas that makes motor and electrical equipment inside with interior and keep air positive pressure, ignites damp to prevent the spark that electrical equipment produces in safe range.Need to be communicated with gas circuit and electrical equipment by valve inner when purging, need safety valve that the air pressure of electrical equipment inside is controlled at below safety value when keeping the electrical equipment internal positive pressure; Present purging and safety device mostly are the discrete device, function singleness, and integrated level is low, does not possess automatic detection and controls function.
Summary of the invention
The purpose of this utility model is to propose the technical scheme that a kind of motor malleation purges control device, and integrated level is high, possesses automatic detection and controls function.
To achieve these goals, the technical solution of the utility model is: a kind of motor malleation purges control device, the work source of the gas connects external air source by filtering pressure reducer, comprises being arranged on Pneumatic sensing controller, Pneumatic timer device, the blow down valve in the pneumatic control case and being arranged on safety exhaust unit on explosion-proof motor shell; Be provided with positive pressure air interface, pressure detecting interface, steam vent on the shell of described fire-proof motor, described blow down valve is a pneumatic control valve that comprises two air inlets, gas outlet and pneumatic control mouth, and the pneumatic control mouth of described blow down valve connects the Pneumatic timer device by gas circuit; An air inlet of blow down valve is connected with the work source of the gas by the gas circuit that is provided with a choke valve, the gas circuit of another air inlet of blow down valve by being provided with a precise pressure-reducing valve is connected with the work source of the gas, and the gas outlet of blow down valve is connected with positive pressure air interface on described explosion-proof motor shell by gas circuit; Described Pneumatic sensing controller connects the pressure detecting interface of described Pneumatic timer device, precise pressure-reducing valve, safety exhaust unit, explosion-proof motor shell as pneumatic control component.
Further, described Pneumatic sensing controller is an integrated pneumatic power controller that comprises diaphragm valve and logic control valve, can realize many gas circuits controls; The gas circuit of Pneumatic sensing controller by being provided with logic gas pressure-reducing valve is connected with the work source of the gas, and the Pneumatic sensing controller connects by gas circuit and receives the force value that the pressure detecting interface from the explosion-proof motor shell sends; The Pneumatic sensing controller connects and controls the aperture of described precise pressure-reducing valve by gas circuit.
Further, described safety exhaust unit is an integrating device that comprises pneumatic air bleeding valve, safety valve, flow measurement orifice plate, described pneumatic air bleeding valve and safety valve are connected with described steam vent on explosion-proof motor shell, and pneumatic air bleeding valve is provided with the pneumatic control interface that is used for driving pneumatic air bleeding valve action that is connected with described Pneumatic sensing controller by gas circuit; Be provided with the measurement mouth that is used for transmitting air pressure signal that is connected with the Pneumatic sensing controller by gas circuit in the both sides of described flow-through orifice.
Further, described Pneumatic timer device comprises the rotary cylinder of mechanical timer, driving device timer, the switch valve of output pressure signal; The access port that described rotary cylinder obtains operating pressure is connected with described Pneumatic sensing controller by gas circuit, and the gas outlet of described switch valve is connected with the pneumatic control mouth of described blow down valve by gas circuit.
Further, the pressure of described work source of the gas is 0.5MPa～1.0MPa.。
The beneficial effects of the utility model are: possess the comprehensive function that purging and malleation keep; It is stable that automatic adjusting compensating flowrate reaches pressure balance; Compact conformation, safe and reliable, all consisted of by pneumatic element, without any active electrical equipment, can satisfy requirement of explosion proof.
Below in conjunction with drawings and Examples, the utility model being done one describes in detail.
Description of drawings
Fig. 1 is the utility model structure chart.
The specific embodiment
As Fig. 1, a kind of motor malleation purges control device, the work source of the gas connects external air source 1 by filtering pressure reducer 1-1, comprises being arranged on Pneumatic sensing controller 2, Pneumatic timer device 3, the blow down valve 4 in the pneumatic control case and being arranged on safety exhaust unit 5 on explosion-proof motor shell; Be provided with positive pressure air interface 6, pressure detecting interface 7, steam vent 8 on the shell of described fire-proof motor, described blow down valve is a pneumatic control valve that comprises two air inlets, gas outlet and pneumatic control mouth, and the pneumatic control mouth of described blow down valve connects the Pneumatic timer device by gas circuit P1; An air inlet of blow down valve is connected with the work source of the gas by the gas circuit P2 that is provided with a choke valve 9, the gas circuit P3 of another air inlet of blow down valve by being provided with a precise pressure-reducing valve 10 is connected with the work source of the gas, and the gas outlet of blow down valve is passed through gas circuit P4 and is connected with positive pressure air interface on described explosion-proof motor shell; Described Pneumatic sensing controller connects the pressure detecting interface of described Pneumatic timer device, precise pressure-reducing valve, safety exhaust unit, explosion-proof motor shell as pneumatic control component.
Described Pneumatic sensing controller is an integrated pneumatic power controller that comprises diaphragm valve and logic control valve, can realize many gas circuits controls; The gas circuit P5 of Pneumatic sensing controller by being provided with logic gas pressure-reducing valve 11 is connected with the work source of the gas, and the Pneumatic sensing controller connects by gas circuit P6 and receives the force value that the pressure detecting interface from the quick-fried motor housing sends; The Pneumatic sensing controller connects and controls the aperture of described precise pressure-reducing valve by gas circuit P7.
Described safety exhaust unit is an integrating device that comprises pneumatic air bleeding valve, safety valve, flow measurement orifice plate, described pneumatic air bleeding valve and safety valve are connected with described steam vent on explosion-proof motor shell, and pneumatic air bleeding valve is provided with the pneumatic control interface that is used for driving pneumatic air bleeding valve action that is connected with described Pneumatic sensing controller by gas circuit P8; Be provided with the measurement mouth that is used for transmitting air pressure signal that is connected with the Pneumatic sensing controller by gas circuit P9, P10 in the both sides of described flow-through orifice.
Described Pneumatic timer device comprises the rotary cylinder of mechanical timer, driving device timer, the switch valve of output pressure signal; The access port that described rotary cylinder obtains operating pressure is connected with described Pneumatic sensing controller by gas circuit P11, and the gas outlet of described switch valve is connected with the pneumatic control mouth of described blow down valve by gas circuit P1.
The pressure of described work source of the gas is 0.5MPa～1.0MPa.
In a specific embodiment: use rated pressure as 0.6MPa, latus rectum as the work source of the gas, adopts AW60-F10 type filtering pressure reducer as the DN25 compressed air line; Adopt the normally-closed pneumatic two-position three-way valve as blow down valve, source purge gas pipeline P2 connects the normally closed air inlet of blow down valve, and what pressure kept that source of the gas pipeline P3 connects blow down valve often drives gas port into.
When motor malleation purging control device is started working, the Pneumatic sensing controller drives the rotary cylinder action of Pneumatic timer device by gas circuit P11, rotary cylinder driving device timer begins timing and the switch valve of Pneumatic timer device is opened, the pneumatic control mouth of blow down valve produces pressure, and the normally closed air inlet of blow down valve is communicated with the gas outlet; The Pneumatic sensing controller is opened by the pneumatic air bleeding valve that gas circuit P8 drives safety exhaust unit simultaneously, make and form the gas circuit of opening in motor housing, compressed air enters, discharges from steam vent 8 from positive pressure air interface 6 by gas circuit P2, the purging of realization to fire-proof motor inside, choke valve 9 is controlled the sweep gas flow.After the Pneumatic timer device is completed timing, the switch valve of Pneumatic timer device cuts out, and blow down valve resets, and the gas port that often drives into of blow down valve is communicated with the gas outlet, compressed air keeps source of the gas by gas circuit P3 for explosion-proof motor shell provides pressure, and precise pressure-reducing valve 10 provides stable pressure for pressure keeps source of the gas; The Pneumatic sensing controller cuts out the gas circuit P8 that is connected with the pneumatic air bleeding valve of safety exhaust unit simultaneously, makes the pneumatic exhaust valve closure of safety exhaust unit, and explosion-proof motor shell enters the pressure hold mode.
When explosion-proof motor shell was in the pressure hold mode, the Pneumatic sensing controller was controlled the aperture of described precise pressure-reducing valve by gas circuit P7, made explosion-proof motor shell inside be in stable force value; During higher than the safe pressure value set, the safety valve in safety exhaust unit is opened exhaust automatically, makes the pressure decreased in explosion-proof motor shell when the pressure accident in explosion-proof motor shell.
Described logic gas pressure-reducing valve 11 provides the work source of the gas for the Pneumatic sensing controller; The Pneumatic sensing controller is sent air pressure signal according to the measurement mouth of the both sides of flow-through orifice by gas circuit P9, P10 and is calculated extraction flow; The force value that the Pneumatic sensing controller detects in explosion-proof motor shell according to the pressure detecting interface 7 on explosion-proof motor shell.
Prepurge and the malleation in running that the utility model is mainly used in before fire-proof motor starts keep, reach to keep malleation in the whole displacements of the imflammable gas of motor internal and running always, be motor internal pressure higher than external environment condition pressure, but be unlikely to too high to safety valve action.Can before electric motor starting, motor internal gas be gone out according to the time rapid purging of setting, in keeping the malleation process, can reach the stable effect of pressure balance along with the automatic compensating flowrate of regulating of the size of amount of leakage.
The utility model can utilize pneumatic transmitter to detect the interior pressure of motor pressurized enclosure, utilize pneumatic controller to control the aperture of pressure-reducing valve to guarantee the gas compensation flow, and it is chain to utilize pneumatic contact to realize with the start and stop of motor, the system compact conformation, safe and reliable, and without any active electrical equipment, can easily satisfy requirement of explosion proof.
Claims (5)
1. a motor malleation purges control device, and the work source of the gas connects external air source by filtering pressure reducer, comprises being arranged on Pneumatic sensing controller, Pneumatic timer device, the blow down valve in the pneumatic control case and being arranged on safety exhaust unit on explosion-proof motor shell; It is characterized in that, be provided with positive pressure air interface, pressure detecting interface, steam vent on the shell of described fire-proof motor, described blow down valve is a pneumatic control valve that comprises two air inlets, gas outlet and pneumatic control mouth, and the pneumatic control mouth of described blow down valve connects the Pneumatic timer device by gas circuit; An air inlet of blow down valve is connected with the work source of the gas by the gas circuit that is provided with a choke valve, the gas circuit of another air inlet of blow down valve by being provided with a precise pressure-reducing valve is connected with the work source of the gas, and the gas outlet of blow down valve is connected with positive pressure air interface on described explosion-proof motor shell by gas circuit; Described Pneumatic sensing controller connects the pressure detecting interface of described Pneumatic timer device, precise pressure-reducing valve, safety exhaust unit, explosion-proof motor shell as pneumatic control component.
2. a kind of motor malleation according to claim 1 purges control device, it is characterized in that, described Pneumatic sensing controller is an integrated pneumatic power controller that comprises diaphragm valve and logic control valve, can realize many gas circuits controls; The gas circuit of Pneumatic sensing controller by being provided with logic gas pressure-reducing valve is connected with the work source of the gas, and the Pneumatic sensing controller connects by gas circuit and receives the force value that the pressure detecting interface from the explosion-proof motor shell sends; The Pneumatic sensing controller connects and controls the aperture of described precise pressure-reducing valve by gas circuit.
3. a kind of motor malleation according to claim 1 purges control device, it is characterized in that, described safety exhaust unit is an integrating device that comprises pneumatic air bleeding valve, safety valve, flow measurement orifice plate, described pneumatic air bleeding valve and safety valve are connected with described steam vent on explosion-proof motor shell, and pneumatic air bleeding valve is provided with the pneumatic control interface that is used for driving pneumatic air bleeding valve action that is connected with described Pneumatic sensing controller by gas circuit; Be provided with the measurement mouth that is used for transmitting air pressure signal that is connected with the Pneumatic sensing controller by gas circuit in the both sides of described flow-through orifice.
4. a kind of motor malleation according to claim 1 purges control device, it is characterized in that, described Pneumatic timer device comprises the rotary cylinder of mechanical timer, driving device timer, the switch valve of output pressure signal; The access port that described rotary cylinder obtains operating pressure is connected with described Pneumatic sensing controller by gas circuit, and the gas outlet of described switch valve is connected with the pneumatic control mouth of described blow down valve by gas circuit.
5. a kind of motor malleation according to claim 1 purges control device, it is characterized in that, the pressure of described work source of the gas is 0.5MPa～1.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667121 CN202943055U (en) | 2012-12-07 | 2012-12-07 | Motor positive pressure purging control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667121 CN202943055U (en) | 2012-12-07 | 2012-12-07 | Motor positive pressure purging control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202943055U true CN202943055U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220667121 Expired - Lifetime CN202943055U (en) | 2012-12-07 | 2012-12-07 | Motor positive pressure purging control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202943055U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423496A (en) * | 2013-08-09 | 2013-12-04 | 南阳市华业防爆仪表有限公司 | Positive pressure type explosion-proof control system |
| CN103553079A (en) * | 2013-10-30 | 2014-02-05 | 天津市化工设计院 | Explosion-proof treatment method of bared conductor of sodium cyanide cracking furnace |
| CN109724805A (en) * | 2018-12-09 | 2019-05-07 | 西安航天动力试验技术研究所 | A kind of purging system of air heating apparatus and blow down method |
| CN113472144A (en) * | 2021-08-09 | 2021-10-01 | 盾石磁能科技有限责任公司 | Generator positive pressure protection system and power generation device |
| CN114076421A (en) * | 2022-01-19 | 2022-02-22 | 浙江飞旋科技有限公司 | Protection method and system for refrigeration system adopting magnetic suspension refrigeration compressor |
-
2012
- 2012-12-07 CN CN 201220667121 patent/CN202943055U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423496A (en) * | 2013-08-09 | 2013-12-04 | 南阳市华业防爆仪表有限公司 | Positive pressure type explosion-proof control system |
| CN103423496B (en) * | 2013-08-09 | 2015-12-23 | 南阳市华业防爆仪表有限公司 | Positive pressure type explosion-proof control system |
| CN103553079A (en) * | 2013-10-30 | 2014-02-05 | 天津市化工设计院 | Explosion-proof treatment method of bared conductor of sodium cyanide cracking furnace |
| CN109724805A (en) * | 2018-12-09 | 2019-05-07 | 西安航天动力试验技术研究所 | A kind of purging system of air heating apparatus and blow down method |
| CN113472144A (en) * | 2021-08-09 | 2021-10-01 | 盾石磁能科技有限责任公司 | Generator positive pressure protection system and power generation device |
| CN114076421A (en) * | 2022-01-19 | 2022-02-22 | 浙江飞旋科技有限公司 | Protection method and system for refrigeration system adopting magnetic suspension refrigeration compressor |
| CN114076421B (en) * | 2022-01-19 | 2022-03-29 | 浙江飞旋科技有限公司 | Protection method and system for refrigeration system adopting magnetic suspension refrigeration compressor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |