CN208203424U - A kind of dual-fuel diesel engine liquefied natural gas supplying system control device - Google Patents
A kind of dual-fuel diesel engine liquefied natural gas supplying system control device Download PDFInfo
- Publication number
- CN208203424U CN208203424U CN201820340342.1U CN201820340342U CN208203424U CN 208203424 U CN208203424 U CN 208203424U CN 201820340342 U CN201820340342 U CN 201820340342U CN 208203424 U CN208203424 U CN 208203424U
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- China
- Prior art keywords
- immersed pump
- dual
- natural gas
- frequency converter
- diesel engine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model discloses a kind of dual-fuel diesel engine liquefied natural gas supplying system control devices, include: immersed pump pond, and for exporting LNG, the immersed pump pond is equipped with immersed pump；Pressure transmitter is set to the exit in immersed pump pond, is converted to current signal for acquiring the pressure in immersed pump pond exit, and pressure signal；Frequency converter, input terminal are connected to pressure transmitter, and output end is connected to immersed pump, for the actual pressure value in collected immersed pump pond exit to compare with preset target pressure value, adjust the revolving speed of immersed pump.The utility model control principle is simple, can make immersed pump under output flow situation of change, and the variation of quick, stable response traffic keeps its output pressure constant.
Description
Technical field
The utility model relates in environment peculiar to vessel, applied to a kind of control method of liquefied natural gas supplying system, especially
It is related to dual-fuel diesel engine liquefied natural gas supplying system control device.
Background technique
With the reinforcement of global environmental consciousness, ship discharge pollution on the environment has been attracted extensive attention, in order to full
Sufficient effluent specification, ship, which must adopt an effective measure, reduces the discharge of self-pollution gas.Dual fuel engine using diesel oil and
Two kinds of fuel of natural gas, more environmentally friendly compared to previous diesel engine, more economically, it will be the following marine diesel mainstream
Development stream direction.It therefore, is vital for the control method of liquefied natural gas supplying system.Due to liquefied natural gas
Characteristic, the immersed pump output flow under conventional control methods changes, and the pressure of output also can be unstable, is unable to satisfy
Use demand.
Utility model content
The purpose of the utility model is to provide a kind of dual-fuel diesel engine liquefied natural gas supplying system control device, controls
Principle processed is simple, can make immersed pump under output flow situation of change, and the variation of quick, stable response traffic makes its output
Pressure is constant.
In order to achieve the goal above, the utility model is achieved through the following technical solutions:
A kind of dual-fuel diesel engine liquefied natural gas supplying system control device, its main feature is that, include:
Immersed pump pond, for exporting LNG, the immersed pump pond is equipped with immersed pump；
Pressure transmitter is set to the exit in immersed pump pond, for acquiring the pressure in immersed pump pond exit, and handle
Pressure signal is converted to current signal；
Frequency converter, input terminal are connected to pressure transmitter, and output end is connected to immersed pump, are used for collected latent liquid
The actual pressure value in pond exit is pumped compared with preset target pressure value, adjusts the revolving speed of immersed pump.
The frequency converter is arranged inside or outside frequency converter control cabinet, is additionally provided in the frequency converter control cabinet:
One switch, is connected with the power supply of frequency converter；
One relay obtains the contact closure of electric control relay, so that the frequency converter operation/stopping.
The relay is controlled on the spot by a button.
The relay is also attached to a remote control terminal, for remotely controlling operation/stopping of frequency converter.
The switch is breaker or disconnecting switch.
The current signal is the 4-20mA current signal of standard.
The utility model compared with prior art, has the advantage that
The utility model control principle is simple, can make immersed pump under output flow situation of change, quick, stable response
The variation of flow keeps its output pressure constant.
Detailed description of the invention
Fig. 1 is a kind of structural representation of dual-fuel diesel engine liquefied natural gas supplying system control device of the utility model
Figure.
Specific embodiment
The utility model is done and is further explained by the way that a preferable specific embodiment is described in detail below in conjunction with attached drawing
It states.
As shown in Figure 1, a kind of dual-fuel diesel engine liquefied natural gas supplying system control device, includes:
Immersed pump pond 1, for exporting LNG, the immersed pump pond is equipped with immersed pump 11；
Pressure transmitter 2 is set to the exit in immersed pump pond 1, for acquiring the pressure in immersed pump pond exit, and
Pressure signal is converted to current signal；
Frequency converter 3, input terminal are connected to pressure transmitter 2, and output end is connected to immersed pump 11, and being used for will be collected
The actual pressure value in immersed pump pond exit adjusts the revolving speed of immersed pump compared with preset target pressure value.
The frequency converter 3 is arranged inside or outside frequency converter control cabinet 4, also sets in the frequency converter control cabinet
Have:
One switch, is connected with the power supply of frequency converter, which is breaker or disconnecting switch；
One relay K, obtains the contact closure of electric control relay K, so that the frequency converter operation/stopping.
The relay 41 is controlled on the spot by a button 43.
The relay 41 is also attached to a remote control terminal 44, for remotely controlling operation/stopping of frequency converter 3.
The current signal is the 4-20mA current signal of standard.
Continuing with cooperation referring to Fig. 1, when the utility model is applied: the pressure in the acquisition of pressure transmitter 21 exit of immersed pump pond
Power, and pressure signal is converted to the 4-20mA current signal of standard, current signal input converter, the frequency converter 3 is equipped with PID
Module presets the parameter of PID module, the actual pressure value and preset mesh that frequency converter exports collected immersed pump pond
Mark pressure value compares, if the actual pressure value of immersed pump pond outlet is greater than the pressure value of setting, reduces turning for immersed pump
Speed reduces the output pressure in immersed pump pond, if the actual pressure value that immersed pump pond 1 exports is less than the pressure value of setting, increases
Add the revolving speed of immersed pump, increase the output pressure in immersed pump pond 1, the reality output pressure to achieve the purpose that immersed pump is constant.
The utility model has local and remote two kinds of control methods.Button is installed on control cabinet panel of frequency converter, it can be with
The coil on-off of relay is controlled by button, and the operation and stopping of frequency converter are controlled by relay contact；Long-range control
Method can control frequency converter by the signal of remote control terminal (such as central station of floating dock) sending in the position far from immersed pump pond
Operation and stopping.
In conclusion a kind of the utility model dual-fuel diesel engine liquefied natural gas supplying system control device, control
Principle is simple, can make immersed pump under output flow situation of change, the variation of quick, stable response traffic, makes its output pressure
Power is constant.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended
Claim limit.
Claims (6)
1. a kind of dual-fuel diesel engine liquefied natural gas supplying system control device, characterized by comprising:
Immersed pump pond, for exporting LNG, the immersed pump pond is equipped with immersed pump；
Pressure transmitter is set to the exit in immersed pump pond, for acquiring the pressure in immersed pump pond exit, and pressure
Signal is converted to current signal；
Frequency converter, input terminal are connected to pressure transmitter, and output end is connected to immersed pump, are used for collected immersed pump pond
The actual pressure value in exit adjusts the revolving speed of immersed pump compared with preset target pressure value.
2. dual-fuel diesel engine as described in claim 1 liquefied natural gas supplying system control device, which is characterized in that institute
The frequency converter stated is arranged inside or outside frequency converter control cabinet, is additionally provided in the frequency converter control cabinet:
One switch, is connected with the power supply of frequency converter；
One relay obtains the contact closure of electric control relay, so that the frequency converter operation/stopping.
3. dual-fuel diesel engine as claimed in claim 2 liquefied natural gas supplying system control device, which is characterized in that institute
The relay stated is controlled on the spot by a button.
4. dual-fuel diesel engine as claimed in claim 2 liquefied natural gas supplying system control device, which is characterized in that institute
The relay stated is also attached to a remote control terminal, for remotely controlling operation/stopping of frequency converter.
5. dual-fuel diesel engine as claimed in claim 2 liquefied natural gas supplying system control device, which is characterized in that institute
The switch stated is breaker or disconnecting switch.
6. dual-fuel diesel engine as described in claim 1 liquefied natural gas supplying system control device, which is characterized in that institute
The current signal stated is the 4-20mA current signal of standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820340342.1U CN208203424U (en) | 2018-03-13 | 2018-03-13 | A kind of dual-fuel diesel engine liquefied natural gas supplying system control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820340342.1U CN208203424U (en) | 2018-03-13 | 2018-03-13 | A kind of dual-fuel diesel engine liquefied natural gas supplying system control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208203424U true CN208203424U (en) | 2018-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820340342.1U Active CN208203424U (en) | 2018-03-13 | 2018-03-13 | A kind of dual-fuel diesel engine liquefied natural gas supplying system control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN208203424U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483883A (en) * | 2019-09-12 | 2021-03-12 | 安瑞科(廊坊)能源装备集成有限公司 | LNG gas station |
-
2018
- 2018-03-13 CN CN201820340342.1U patent/CN208203424U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483883A (en) * | 2019-09-12 | 2021-03-12 | 安瑞科(廊坊)能源装备集成有限公司 | LNG gas station |
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