CN202125422U - Electric butterfly valve control device for vacuum pump inlet valve - Google Patents
Electric butterfly valve control device for vacuum pump inlet valve Download PDFInfo
- Publication number
- CN202125422U CN202125422U CN2011202142460U CN201120214246U CN202125422U CN 202125422 U CN202125422 U CN 202125422U CN 2011202142460 U CN2011202142460 U CN 2011202142460U CN 201120214246 U CN201120214246 U CN 201120214246U CN 202125422 U CN202125422 U CN 202125422U
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- CN
- China
- Prior art keywords
- vacuum pump
- butterfly valve
- electric butterfly
- control circuit
- pressure switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an electric butterfly valve control device for a vacuum pump inlet valve, which comprises an electric power supply, a hand switch, a pressure switch and a vacuum pump control circuit. The hand switch, the pressure switch and the vacuum pump control circuit are in series connection to be connected with two ends of the electric power supply, the pressure switch is connected with an electric butterfly valve control circuit, and a vacuum pump overload protecting circuit is in series connection with a delay circuit and then connected with the vacuum pump control circuit. The electric butterfly valve control device is simple in structure, convenient to use and free of machine halt accidents due to the fact that an electric butterfly valve of the inlet valve can be closed when a vacuum pump trips, thereby greatly improving safety and stability of operation of a generator set and being capable of guaranteeing safe and stable operation of an electrical power system.
Description
Technical field
The utility model belongs to the vacuum pump technology field, especially relates to a kind of vacuum pump intake valve electric butterfly valve control gear.
Background technique
That Nash hytor has is simple in structure, use characteristics easy to maintenance; Obtained extensive use in all trades and professions; In power industry, become indispensable equipment especially; Vacuum pump all should carry out total group test before putting into operation and before and after the overhaul, to prevent causing catastrophe failures such as Turbo-generator Set shutdown in normal emerged in operation fault.At present; Controlling method to vacuum pump intake valve electric butterfly valve is to adopt to bleed separately just to control the open and close of electric butterfly valve according to pressure; This controlling method is simple to operate, and the maintenance man understands easily, but trips at the normal vacuum pump that occurs easily in service; But the situation that the electric butterfly valve of intake valve does not cut out can cause steam turbine generator to reduce stopping accident fast because of vacuum.
Summary of the invention
For addressing the above problem, the purpose of the utility model provides a kind of vacuum pump intake valve electric butterfly valve control gear.
For realizing the foregoing invention purpose, the utility model adopts following technological scheme:
A kind of vacuum pump intake valve electric butterfly valve control gear; It comprises power supply, hand switch, pressure switch and vacuum pump control circuit; Be connected on the power supply two ends after hand switch, pressure switch and the series connection of vacuum pump control circuit; Pressure switch is connected with the electric butterfly valve control circuit, and the vacuum pump overload protecting circuit is connected with the vacuum pump control circuit with delay circuit series connection back.
Owing to adopt aforesaid technological scheme, the utlity model has following superiority:
This vacuum pump intake valve electric butterfly valve control gear, it is simple in structure, and is with low cost; Easy to use, save human and material resources and time, the electric butterfly valve of intake valve can cut out when vacuum pump trips; Stopping accident can not occur, improved Security, the stability of generator set operation greatly, and safety be accurately high; Speed is fast, can guarantee the safe and stable operation of electric power system.
Description of drawings
Fig. 1 is the theory structure schematic representation of the utility model.
Embodiment
Through accompanying drawing and embodiment the technological scheme of the utility model is done further explain below.
As shown in Figure 1; This vacuum pump intake valve electric butterfly valve control gear; It comprises power supply, hand switch, pressure switch and vacuum pump control circuit, and power supply adopts direct current 220V power supply, is connected on the power supply two ends after hand switch, pressure switch and the series connection of vacuum pump control circuit; Pressure switch is connected with the electric butterfly valve control circuit, and the vacuum pump overload protecting circuit is connected with the vacuum pump control circuit with delay circuit series connection back.
Start hand switch, make the energising of vacuum pump control circuit, vaccum pump motor M operation begins to vacuumize, and when the vacuum pressure in the pipeline reached the setting value of pressure switch, pressure switch provided signal to the electric butterfly valve control circuit, and the control electric butterfly valve is opened; Stop hand switch, make the outage of vacuum pump control circuit, vaccum pump motor M is out of service; Start the electric butterfly valve control circuit simultaneously; Before vaccum pump motor M is out of service, electric butterfly valve cuts out, remain enough degree of vacuum in the generator, can not make generator outage to reach.
After vacuum pump is because of the relay protection would trip; The DCS supervisory system, promptly Distributed Control System can be received a vacuum pump trip signal; After receiving trip signal; The DCS supervisory system can issue an instruction out of service, should instruct and send the pulse command that stops the vaccum pump motor operation through the about 3s of delay circuit time-delay (time is too short easily because of signal interference generation misoperation, the oversize definite value that makes degree of vacuum be reduced to the jumping machine easily of time); The intake valve electric butterfly valve cuts out, can not occur the accident of the machine of jumping again.
Claims (1)
1. vacuum pump intake valve electric butterfly valve control gear; It is characterized in that: it comprises power supply, hand switch, pressure switch and vacuum pump control circuit; Be connected on the power supply two ends after hand switch, pressure switch and the series connection of vacuum pump control circuit; Pressure switch is connected with the electric butterfly valve control circuit, and the vacuum pump overload protecting circuit is connected with the vacuum pump control circuit with delay circuit series connection back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202142460U CN202125422U (en) | 2011-06-23 | 2011-06-23 | Electric butterfly valve control device for vacuum pump inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202142460U CN202125422U (en) | 2011-06-23 | 2011-06-23 | Electric butterfly valve control device for vacuum pump inlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125422U true CN202125422U (en) | 2012-01-25 |
Family
ID=45488490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202142460U Expired - Fee Related CN202125422U (en) | 2011-06-23 | 2011-06-23 | Electric butterfly valve control device for vacuum pump inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125422U (en) |
-
2011
- 2011-06-23 CN CN2011202142460U patent/CN202125422U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20120623 |