CN205277774U - Energy -saving CNG gas substation compressor controlling means - Google Patents
Energy -saving CNG gas substation compressor controlling means Download PDFInfo
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- CN205277774U CN205277774U CN201520995368.6U CN201520995368U CN205277774U CN 205277774 U CN205277774 U CN 205277774U CN 201520995368 U CN201520995368 U CN 201520995368U CN 205277774 U CN205277774 U CN 205277774U
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Abstract
The utility model discloses an energy -saving CNG gas substation compressor controlling means, including the cabinet body the internal portion of cabinet sets up converter, PLC control module, analog input/output module and auxiliary relay, PLC control module is connected with the analog input/output module, and through auxiliary relay to the converter sends to open and stops the signal, also receives converter current signal feedback simultaneously, PLC control module still is connected with valve door module through auxiliary relay, the converter is connected with the compressor, carries out PID according to compressor host computer electric current and adjusts, through converter control compressor revolution. The utility model discloses in providing an energy -saving CNG gas substation compressor controlling means, reduce CNG gas substation's energy consumption and tolerance loss, provide the work efficiency of compressor.
Description
Technical field
The utility model relates to a kind of compressor control device, particularly relates to a kind of energy-saving CNG air entraining substation compression control device.
Background technology
Sweet natural gas (abbreviation CNG) is more and more paid attention in communications and transportation as a kind of high-efficiency cleaning type energy, and is used widely in all parts of the country. For the place in not gas source, some localities, it is necessary to set up CNG air entraining substation, rely on tank car to transport the gas-holder being full of Sweet natural gas from mother station, after being compressed by sub-station compressor, directly it is charged to accumulator unit in vehicle reservation steel cylinder or station. Owing to operating pressure scope (3.0MPa-20MPa) change is big, air entraining substation energy consumption of compressor is big, tolerance loss is big, therefore develops the extensive accreditation that a kind of energy-saving CNG air entraining substation compressor variable frequency Controlling System must obtain market.
Practical novel content
The purpose of this utility model is to provide a kind of energy-saving CNG air entraining substation compressor control device, reduces energy consumption and the tolerance loss of CNG air entraining substation, it is provided that the working efficiency of compressor.
The technical solution adopted in the utility model is:
A kind of energy-saving CNG air entraining substation compressor control device, comprises cabinet, arranges frequency transformer, PLC control module, analog input and output module and intermediate relay in described cabinet inside;
Described PLC control module and analog input and output model calling, and send start and stop signal by intermediate relay to described frequency transformer, also receive inverter current signal feedback simultaneously;
Described PLC control module is also connected with valve module by intermediate relay;
Described frequency transformer is connected with compressor, carries out PID adjustment according to compressor host electric current, by Frequency Converter Control compressor host rotating speed.
Further, described PLC control module is also connected with aerating utility appliance by intermediate relay and alternating current contactor.
Further, described aerating utility appliance comprises cooling blower, cooling-water pump, pre-lubrication oil pump and oil heater.
Further, described analog input and output module is also connected with safety barrier and spot sensor, and the field data of spot sensor collection is sent to analog input and output module through safety barrier, carries out data processing by PLC control.
Further, described valve module being provided with valve position feedback module, described PLC control module is by intermediate relay and described valve position feedback model calling.
The beneficial effects of the utility model are:
1) in the utility model, CNG air entraining substation compressor is divided into two stages of compression by intake pressure, normal play machine after intake pressure be more than or equal to switching value and carry out one stage of compression, when intake pressure is less than switching pressure, valve module is closed and is carried out two grades of compressions, when intake pressure is less than minimum pressure of inspiration(Pi), compressor emergency shutdown; Carry out PID adjustment according to main frame electric current, by Frequency Converter Control engine speed, can regulate according to actual demand, avoid doing without diligent, reduce energy loss.
2) PID adjustment is carried out according to main frame electric current. Current PI D control can avoid load on host computers to change the impact brought, and its algorithm is simple, reliability height, stability height.
3) the utility model starting current is low, and voltage fluctuation is little, working efficiency height, and energy consumption reduces by more than 40%, and system pid algorithm is simple, reliability height, stability height, can extend compressor work-ing life, reduce maintenance cost and running cost.
Accompanying drawing explanation
Fig. 1 is practical novel system general diagram.
Embodiment
In order to make the advantage of the purpose of this utility model and technical scheme clearly understand, below in conjunction with accompanying drawing and example, the utility model is further elaborated.
As shown in Figure 1, a kind of energy-saving CNG air entraining substation compressor control device, comprises cabinet, arranges frequency transformer, PLC control module, analog input and output module and intermediate relay in described cabinet inside;
PLC control module and analog input and output model calling, and send start and stop signal by intermediate relay to described frequency transformer, also receive inverter current signal feedback simultaneously;
PLC control module is also connected with valve module by intermediate relay;
Frequency transformer is connected with compressor, carries out PID adjustment according to compressor host electric current, by Frequency Converter Control compressor host rotating speed.
PLC control module is also connected with aerating utility appliance by intermediate relay and alternating current contactor.
Aerating utility appliance comprises cooling blower, cooling-water pump, pre-lubrication oil pump and oil heater.
Analog input and output module is also connected with safety barrier and spot sensor, and the field data of spot sensor collection is sent to analog input and output module through safety barrier, carries out data processing by PLC control.
Being provided with valve position feedback module on valve module, described PLC control module is by intermediate relay and described valve position feedback model calling.
Principle of work of the present utility model is:
The aerating compressor host electric current signal that PLC control module is fed back according to frequency transformer carries out PID adjustment, control compressor host rotating speed. When intake pressure is greater than number of compression stages switching pressure, valve module is opened, and Sweet natural gas can directly be filled with gas-holder or vehicle reservation steel cylinder after first-stage cylinder is compressed; When intake pressure is less than or equal to number of compression stages switching pressure, valve module closes, and Sweet natural gas after first-stage cylinder and secondary cylinder are compressed, just need to can be filled with gas-holder or vehicle reservation steel cylinder.
Claims (5)
1. an energy-saving CNG air entraining substation compressor control device, comprises cabinet, it is characterised in that: in described cabinet inside, frequency transformer, PLC control module, analog input and output module and intermediate relay are set;
Described PLC control module and analog input and output model calling, and send start and stop signal by intermediate relay to described frequency transformer, also receive inverter current signal feedback simultaneously;
Described PLC control module is also connected with valve module by intermediate relay;
Described frequency transformer is connected with compressor, for carrying out PID adjustment and then control compressor host rotating speed according to compressor host electric current.
2. energy-saving CNG air entraining substation compressor control device according to claim 1, it is characterised in that: described PLC control module is also connected with aerating utility appliance by intermediate relay and alternating current contactor.
3. energy-saving CNG air entraining substation compressor control device according to claim 2, it is characterised in that: described aerating utility appliance comprises cooling blower, cooling-water pump, pre-lubrication oil pump and oil heater.
4. energy-saving CNG air entraining substation compressor control device according to claim 1 and 2, it is characterized in that: described analog input and output module is also connected with safety barrier and spot sensor, the field data of spot sensor collection is sent to analog input and output module through safety barrier, carries out data processing by PLC control.
5. energy-saving CNG air entraining substation compressor control device according to claim 1 and 2, it is characterised in that: being also provided with valve position feedback module on described valve module, described PLC control module is by intermediate relay and described valve position feedback model calling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995368.6U CN205277774U (en) | 2015-12-07 | 2015-12-07 | Energy -saving CNG gas substation compressor controlling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995368.6U CN205277774U (en) | 2015-12-07 | 2015-12-07 | Energy -saving CNG gas substation compressor controlling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205277774U true CN205277774U (en) | 2016-06-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520995368.6U Expired - Fee Related CN205277774U (en) | 2015-12-07 | 2015-12-07 | Energy -saving CNG gas substation compressor controlling means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205277774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382458A (en) * | 2016-10-11 | 2017-02-08 | 诺威尔（天津）能源装备股份有限公司 | Closed-loop control based LNG immersed pump control system and control method thereof |
-
2015
- 2015-12-07 CN CN201520995368.6U patent/CN205277774U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382458A (en) * | 2016-10-11 | 2017-02-08 | 诺威尔（天津）能源装备股份有限公司 | Closed-loop control based LNG immersed pump control system and control 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20171207 |