CN105468048A - Automatic start and stop device of electric heater - Google Patents
Automatic start and stop device of electric heater Download PDFInfo
- Publication number
- CN105468048A CN105468048A CN201510719947.2A CN201510719947A CN105468048A CN 105468048 A CN105468048 A CN 105468048A CN 201510719947 A CN201510719947 A CN 201510719947A CN 105468048 A CN105468048 A CN 105468048A
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- Prior art keywords
- electric heater
- differential pressure
- signal
- orifice
- orifice plate
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- Control Of Fluid Pressure (AREA)
Abstract
The invention provides a control device for automatic start and stop of an pressure regulating system electric heater in a gas transmission field, and automatic control of processing equipment is realized. According to the embodiment, an orifice plate sensor is installed on the downstream of pressure regulating equipment, and a pressure difference signal of the orifice sensor is used as a control command signal for the start of the electric heater. When a pressure regulating valve starts to work, gas flows in a pipeline, a static pressure difference is generated between two sides of an orifice plate; a differential pressure transmitter collects the differential pressure value, converts the differential pressure value into a 4-20 mA signal and uploads the signal to an electric heater control system; and when the differential pressure value reaches or exceeds a set value, the electric heater automatically starts. The electric heater control system carries out PID automatic control according to a heater outlet temperature feedback signal, and a stable gas temperature required by the gas transmission process is ensured. The scheme provided by the invention solves the following problems that: (1) automatic control of the processing equipment in the gas transmission station is realized, the performance is stable, and the operation is safe and reliable; and (2) unattended operation of the gas transmission station is realized, and the efficiency and the management level are improved.
Description
Technical field
This device is the control device as the electric heater automatic start-stop in skid pressure regulation metering system, realizes Gas Stations process equipment Automated condtrol and unmanned, raises the efficiency and management level; Its advantage stable performance, safe and reliable.
Background technology
In Gas Stations, the throttling temperature drop effect occurred in pressure regulation process because of rock gas easily produces ice and blocks up, and gas equipment (as compressor) is to the requirement with temperature degree, so usually adopt electrically heated mode to preheat entering the gas before pressure regulation, the natural gas temperature after throttling is made to meet gas transmission technological requirement; But the start and stop of electric heater carry out Non-follow control by operating personnel in pulpit or scene, cannot Automated condtrol be carried out, add human input and handling cost.
Summary of the invention
This device is the control device of the electric heater automatic start-stop in skid pressure regulation metering system, and building form is: orifice transducer+differential pressure transmitter composition (accompanying drawing 1), system schematic is shown in accompanying drawing 2.Innovation is to install orifice transducer for controlling the start and stop of electric heater in the downstream line of pressure regulator valve, and the function of realization is:
The control command signal that the differential pressure signal of orifice transducer starts as electric heater, namely when in voltage-regulating system, pressure regulator valve is started working, make in pipeline, have gas to flow, local contraction is caused near orifice transducer throttling, flow velocity increases, static pressure is produced poor in orifice plate both sides, differential pressure value is installed in the differential pressure transmitter collection on sensor and is converted to corresponding 4 ~ 20mA current signal and is uploaded to electric heater control system, when the signal index of differential pressure value reach or higher than setting value time, electric heater automatically starts and starts working.Electric heater control system is carried out PID according to heater outlet temperature feedback signal to well heater and is automatically controlled, and ensures to use gas temperature stabilization needed for gas transmission technique.During stopping transportation, the signal index of differential pressure value is zero, and electric heater then quits work automatically.
This programme solves following problem:
(1) Gas Stations process equipment Automated condtrol is realized, stable performance, safe and reliable to operation.
(2) realize Gas Stations unmanned, reduce the workload of operating personnel, increase work efficiency and management level.
Accompanying drawing 1 is orifice transducer+differential pressure transmitter.
Accompanying drawing 2 is system schematic.
Claims (2)
1. this device is the control device as the electric heater automatic start-stop in skid pressure regulation metering system, is made up of orifice transducer+differential pressure transmitter, and is arranged on the downstream line of pressure regulator valve.
2. this programme practical function: install orifice transducer in pressure regulator valve downstream line, because the aperture of orifice plate is less than internal diameter of the pipeline, when fluid flow through orifices plate, the sudden contraction of a fluid stream cross section, flow velocity is accelerated, the static pressure of orifice plate rear end fluid reduces, so produce static pressure difference before and after orifice plate, by the differential pressure before and after differential pressure transmitter measuring diaphragm, and be converted to corresponding 4 ~ 20mA current signal and be uploaded to electric heater control system, when the signal index of differential pressure value reach or higher than setting value time, electric heater automatically starts and starts working, during stopping transportation, without the signal index of differential pressure value, electric heater then quits work automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510719947.2A CN105468048A (en) | 2015-10-30 | 2015-10-30 | Automatic start and stop device of electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510719947.2A CN105468048A (en) | 2015-10-30 | 2015-10-30 | Automatic start and stop device of electric heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105468048A true CN105468048A (en) | 2016-04-06 |
Family
ID=55605851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510719947.2A Pending CN105468048A (en) | 2015-10-30 | 2015-10-30 | Automatic start and stop device of electric heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105468048A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102679151A (en) * | 2012-03-30 | 2012-09-19 | 蚌埠高科能源装备有限公司 | Movable skid-mounted type oilfield associated gas pressure regulating device |
| US20120288625A1 (en) * | 2011-05-10 | 2012-11-15 | Tokyo Electron Limited | Gas supply apparatus, thermal treatment apparatus, gas supply method, and thermal treatment method |
| CN202580622U (en) * | 2012-03-30 | 2012-12-05 | 蚌埠高科能源装备有限公司 | Movable skid-mounted oil field associated gas pressure regulation device |
| CN103256482A (en) * | 2013-05-24 | 2013-08-21 | 重庆明珠机电有限公司 | Electric heating type oil gas mixed transmission intelligent integrated system and control method thereof |
| CN203240280U (en) * | 2013-04-26 | 2013-10-16 | 中国石油集团安全环保技术研究院 | Pressure regulating metering sledge of fuel gas station yard |
-
2015
- 2015-10-30 CN CN201510719947.2A patent/CN105468048A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120288625A1 (en) * | 2011-05-10 | 2012-11-15 | Tokyo Electron Limited | Gas supply apparatus, thermal treatment apparatus, gas supply method, and thermal treatment method |
| CN102679151A (en) * | 2012-03-30 | 2012-09-19 | 蚌埠高科能源装备有限公司 | Movable skid-mounted type oilfield associated gas pressure regulating device |
| CN202580622U (en) * | 2012-03-30 | 2012-12-05 | 蚌埠高科能源装备有限公司 | Movable skid-mounted oil field associated gas pressure regulation device |
| CN203240280U (en) * | 2013-04-26 | 2013-10-16 | 中国石油集团安全环保技术研究院 | Pressure regulating metering sledge of fuel gas station yard |
| CN103256482A (en) * | 2013-05-24 | 2013-08-21 | 重庆明珠机电有限公司 | Electric heating type oil gas mixed transmission intelligent integrated system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |
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| WD01 | Invention patent application deemed withdrawn after publication |