CN104481739A - Pressurizing system mounted on LNG (Liquefied Natural Gas) liquid supplying pipeline and control method of pressurizing system - Google Patents
Pressurizing system mounted on LNG (Liquefied Natural Gas) liquid supplying pipeline and control method of pressurizing system Download PDFInfo
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- CN104481739A CN104481739A CN201410705342.3A CN201410705342A CN104481739A CN 104481739 A CN104481739 A CN 104481739A CN 201410705342 A CN201410705342 A CN 201410705342A CN 104481739 A CN104481739 A CN 104481739A
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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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Abstract
The invention discloses a pressurizing system mounted on an LNG (Liquefied Natural Gas) liquid supplying pipeline and a control method of the pressurizing system. A pressure sensor of the pressurizing system is arranged on a pipeline between a vaporizer and a pressure maintaining valve; the pressure sensor is further connected with the input end of a pressure control unit; the output end of the pressure control unit is connected with the input end of a pipeline pressurizing pump driving device; the output end of the pipeline pressurizing pump driving device is connected with a pipeline pressurizing pump; a liquid inlet end of the pipeline pressurizing pump is communicated with a liquid outlet end of a throttling valve; the liquid outlet end of the pipeline pressurizing pump is connected with the liquid inlet end of the vaporizer. The control method comprises the following steps: A. presetting a standard value of pipeline pressure; B. detecting the pipeline pressure; and C. comparing a detection value with the standard value, wherein when the detection value is less than or equal to the detection value, the pipeline pressurizing pump works; when the detection value is more than the standard value, the pipeline pressurizing pump is at a normally opened state. By the aid of the pressurizing system, the pressure of an LNG bottle set keeps a low-temperature and low-pressure state and an engine obtains stable gas supplying pressure.
Description
Technical field
The present invention relates to a kind of pressurization system, particularly relate to and be a kind ofly arranged on pressurization system on LNG liquid feeding pipeline and controlling method thereof.
Background technique
Known: application and the research of current motor all adopt high-pressure injection intake method to replace traditional normal pressure intake method, and the fuel supply system of LNGV (liquefied natural gas vehicle) must provide stable pressurized gas for motor for this reason.Under the initial liquefaction rock gas being filled into storage tank is generally all in atmospheric pressure state, first must carries out from supercharging storage tank, after pressure is increased to the specified range of working pressure of natural gas engine, then start to carry out air feed to motor.
LNG is the abbreviation of the English Liquefied Natural Gas initial of LNG Liquefied natural gas, and gas cylinder is the gas storage equipment of LNG automobile, is that under the prerequisite of motor supply steady fuel, automobile can stablize traveling at gas cylinder; Along with gas cylinder is round-the-clock to motor supply LNG, in gas cylinder, liquid level declines gradually, gas-phase space increases, gas cylinder internal pressure is declined gradually, so that the supply gas pressure of motor can not be met, fill degradation under the too low storage pressure of fluid temperature (F.T.), just need the outside stable output ensureing fuel to gas cylinder supercharging, namely gas cylinder is from pressurization system.In the market, the supercharging mode adopted realizes supercharging for adopting return-air pressurization system, and this kind of pressurization system exists: debug difficulties, and system is unstable, the phenomenons such as rate of fault is high, and energy loss is serious.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of pressurization system be arranged on LNG liquid feeding pipeline, supercharging on the conveyance conduit of LNG, make the pressure of LNG bottle group maintain low temperature, meanwhile, can ensure that again motor obtains stable supply gas pressure.
The present invention solves the pressurization system be arranged on LNG liquid feeding pipeline that first technical problem adopts, described LNG liquid feeding pipeline, comprise throttle valve, vaporizer and pressure maintaining valve, described throttle valve and vaporizer are by pipeline communication, and described vaporizer and pressure maintaining valve pass through pipeline communication; Described pressurization system comprises blower pump for pipeline, pipe pressurizing pump drive, pressure control unit and pressure transducer; Described pressure transducer is arranged on the pipeline between described vaporizer and described pressure maintaining valve, described pressure transducer is also connected with the input end of described pressure control unit, the output terminal of described pressure control unit is connected with the input end of described pipe pressurizing pump drive, the output terminal of described pipe pressurizing pump drive is connected with described blower pump for pipeline, the liquid feeding end of described blower pump for pipeline is connected with the outlet end of described throttle valve, and the outlet end of described blower pump for pipeline is connected with the liquid feeding end of described vaporizer.
Further, described blower pump for pipeline comprises cylinder body and valve gap; Described cylinder body has the inner chamber that one end is closed; One end that described inner chamber is closed is the bottom of inner chamber; Described intracavity bottom is provided with inlet opening and the liquid outlet opening of communication with cavity; Described cylinder body is provided with liquid entering hole and liquid outlet; Described liquid entering hole is communicated with inlet opening, and described liquid outlet is communicated with liquid outlet opening;
Described liquid entering hole is provided with the feed liquor one-way valve be communicated with to inner cavity by lumen outer; Described liquid outlet is provided with by the fluid one-way valve of inner cavity to inner chamber ft connection;
Described valve gap is arranged on the inner chamber of sealed cylinder block on cylinder body; Telescopic container is provided with in described inner chamber 31; Described Telescopic container has cavity; One end of described Telescopic container is connected with valve bonnet seal, and the other end seals; Described valve gap is provided with the oil connection being communicated with Telescopic container cavity, the output terminal of described pipe pressurizing pump drive is connected with described blower pump for pipeline by described oil connection.
Further, piston is provided with in the inner chamber of described blower pump for pipeline; Described piston and inner chamber are slidably matched; Described Telescopic container is between piston and valve gap, and described Telescopic container one end is connected with valve bonnet seal, and the other end is connected with piston seal.
Further, the valve gap of described blower pump for pipeline is provided with boss; Described boss is provided with abutment sleeve; The cavity of described Telescopic container coordinates with abutment sleeve outer peripheral surface.
Further, the Telescopic container of described blower pump for pipeline is bellows.
Further, the feed liquor one-way valve of described blower pump for pipeline comprises liquid inlet joint, feed liquor valve body; Described feed liquor valve body has the airtight feed liquor valve pocket in one end; The sealed end of described feed liquor valve pocket is the bottom of feed liquor valve pocket; The other end of described feed liquor valve pocket coordinates with liquid inlet joint; Described liquid inlet joint is provided with the passage being communicated with feed liquor valve pocket; Feed liquor spool is provided with in described feed liquor valve pocket; The first spring is provided with, the passage between the airtight described liquid inlet joint of described feed liquor spool and feed liquor valve pocket between bottom described feed liquor spool and feed liquor valve pocket; Described feed liquor spool is provided with the passage being communicated with feed liquor spool both sides feed liquor valve pocket, the bottom of described feed liquor valve pocket is provided with the passage being communicated with inlet opening.
Further, the fluid one-way valve of described blower pump for pipeline comprises fluid joint, fluid valve body; Described fluid valve body has the airtight fluid valve pocket in one end; The sealed end of described fluid valve pocket is the bottom of fluid valve pocket; The other end of described fluid valve pocket coordinates with fluid joint; Described fluid joint is provided with the passage being communicated with fluid valve pocket; Fluid spool is provided with in described fluid valve pocket; The bottom of described fluid valve pocket is provided with the passage being communicated with liquid outlet opening, is provided with the second spring, the passage between the airtight described fluid valve pocket of described fluid spool and liquid outlet opening between described fluid spool and fluid joint; Described fluid spool is provided with the passage being communicated with fluid spool both sides fluid valve pocket.
Further, described LNG storage tank is provided with economic valve; Described economic valve is communicated with LNG storage tank and throttle valve.
Further, described pipe pressurizing pump drive comprises suction booster and solenoid directional control valve.
Second technical problem to be solved by this invention is to provide a kind of controlling method of the pressurization system be arranged on LNG liquid feeding pipeline, makes the pressure of LNG bottle group maintain low temperature, meanwhile, can ensure that again motor obtains stable supply gas pressure.
The present invention solves the controlling method being arranged on the pressurization system on LNG liquid feeding pipeline that second technical problem adopts, and comprises the following steps:
A, on pressure control unit, preset the reference value of pipeline pressure;
B, pressure transducer testing pipes pressure, and the pipeline pressure detected is transferred to pressure control unit;
The pipeline pressure value that pressure transducer detects by C, pressure control unit compares with the reference value preset; When checkout value≤reference value, pressure control unit controls blower pump for pipeline drive unit and starts, and pipe pressurizing pump drive driving tube road suction booster works; When checkout value ﹥ reference value, pressure control unit controls blower pump for pipeline drive unit and quits work, and blower pump for pipeline is in normally open.
The invention has the beneficial effects as follows: on the conveyance conduit of LNG, supercharging is carried out to LNG, make the pressure of LNG bottle group remain on low temperature, meanwhile, can ensure that again motor obtains stable supply gas pressure; The blower pump for pipeline of pressurization system is by arranging Telescopic container in the inner chamber of cylinder body, by passing into the gas or liquid with pressure in Telescopic container, Telescopic container is expanded, thus the gap between Telescopic container and inner chamber is reduced, fluid in compression inner chamber, thus realize the pressurization of convection cell; There is provided pressurized hydraulic oil or atmosphere storage in Telescopic container, avoid and provide the hydraulic oil of pressure or gas leakage in pressurized fluid, convection cell damages simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the exploded perspective view of blower pump for pipeline in Fig. 1;
Fig. 3 is the structural representation of blower pump for pipeline in Fig. 1;
Fig. 4 is the A-A sectional view of Fig. 3;
Fig. 5 is the structural representation of pipe pressurizing pump cylinder in Fig. 1;
Shown in figure: 100-LNG holding vessel, 200-throttle valve, 300-blower pump for pipeline, 400-pipe pressurizing pump drive, 500-pressure control unit, 600-vaporizer, 700-pressure transducer, 800-pressure maintaining valve, 900-knock out drum, 110-stop valve, 120-motor, the economic valve of 130-; 1-feed liquor one-way valve; 11-liquid inlet joint, 12-feed liquor valve body, 13-feed liquor spool, 14-first spring, 2-fluid one-way valve, 21-fluid joint, 22-fluid valve body, 23-fluid spool, 24-second spring, 3-cylinder body, 31-inner chamber, 32-oil inlet hole, 33-oil outlet, 34-filler opening, 35-oil outlet, 4-piston, 5-Telescopic container, 6-abutment sleeve, 7-valve gap, 71-boss, 8-oil connection.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1: as shown in Figure 1, is arranged on the pressurization system on LNG liquid feeding pipeline, described LNG liquid feeding pipeline, comprises throttle valve 200, vaporizer 600, pressure maintaining valve 800, knock out drum 900 and stop valve 110, be communicated with stop valve 110 by described throttle valve 200, vaporizer 600, pressure maintaining valve 800, knock out drum 900 successively between LNG storage tank 100 with motor 120, namely be communicated with by described throttle valve 200 between LNG storage tank 100 with described vaporizer 600, be communicated with by described pressure maintaining valve 800 between described vaporizer 600 with described knock out drum 900, described stop valve 110 is arranged between described knock out drum 900 and motor 120, described pressurization system comprises blower pump for pipeline 300, pipe pressurizing pump drive 400, pressure control unit 500 and pressure transducer 700, described pressure transducer 700 is arranged on the pipeline between described vaporizer 600 and described pressure maintaining valve 800, described pressure transducer 700 is also connected with the input end of described pressure control unit 500, the output terminal of described pressure control unit 500 is connected with the input end of described pipe pressurizing pump drive 400, the output terminal of described pipe pressurizing pump drive 400 is connected with described blower pump for pipeline 300, the liquid feeding end of described blower pump for pipeline 300 is connected with the outlet end of described throttle valve 200, the outlet end of described blower pump for pipeline 300 is connected with the liquid feeding end of described vaporizer 600.
Be arranged on the workflow of the pressurization system on LNG liquid feeding pipeline: the reference value presetting pipeline pressure on pressure control unit 500; Pressure transducer 700 detects the pipeline pressure of vaporizer 600 steam output end, and the pipeline pressure detected is transferred to pressure control unit 500; The pipeline pressure value that pressure transducer 700 detects by pressure control unit 500 compares with the reference value preset; When checkout value≤reference value, pressure control unit 500 controls blower pump for pipeline drive unit 400 and starts, and pipe pressurizing pump drive 400 drives blower pump for pipeline 300 to work; When checkout value ﹥ reference value, pressure control unit 500 controls blower pump for pipeline drive unit 400 and quits work, and blower pump for pipeline 300 is in normally open.The effect of described pressure transducer 700 is testing pipes pressure and by the pressure signal transmission that detects to described pressure control unit 500, the effect of described pressure control unit 500 is startup and the closedown of pipe pressurizing pump drive 400 according to the pipeline pressure SC sigmal control received; Described pipe pressurizing pump drive 400 comprises suction booster and solenoid directional control valve; Described pressure control unit 500, according to the pressure signal received, controls the running state of the suction booster in described pipe pressurizing pump drive 400, the solenoid directional control valve hydraulic control oil in described pipe pressurizing pump drive 400 or the flow direction of gas.Pressurization system of the present invention is arranged on the conveyance conduit of LNG, and the conveyance conduit of LNG carries out supercharging to LNG, makes the pressure of LNG bottle group remain on low temperature, meanwhile, can ensure that again motor obtains stable supply gas pressure.
As preferred embodiment, described blower pump for pipeline 300 comprises cylinder body 3 and valve gap 7; Described cylinder body 3 has the inner chamber 31 that one end is closed; One end that described inner chamber 31 is closed is the bottom of inner chamber 31; Inlet opening 32 and the liquid outlet opening 33 of communication with cavity 31 is provided with bottom described inner chamber 31; Described cylinder body 3 is provided with liquid entering hole 34 and liquid outlet 35; Described liquid entering hole 34 is communicated with inlet opening 32, and described liquid outlet 35 is communicated with liquid outlet opening 33;
Described liquid entering hole 34 is provided with the feed liquor one-way valve 1 be communicated with externally to inner chamber 31 inside by inner chamber 31; Described liquid outlet 35 is provided with by the fluid one-way valve 2 of inner chamber 31 inside to inner chamber 31 ft connection;
Described valve gap 7 is arranged on the inner chamber 31 of sealed cylinder block 3 on cylinder body 3; Telescopic container 5 is provided with in described inner chamber 31; Described Telescopic container 5 has cavity; One end and the valve gap 7 of described Telescopic container 5 are tightly connected, and the other end seals; Described valve gap 7 is provided with the oil connection 8 being communicated with Telescopic container 5 cavity, the output terminal of described pipe pressurizing pump drive 400 is connected with described blower pump for pipeline 300 by described oil connection 8.
Described liquid entering hole 34 is provided with and refers to that mode that feed liquor one-way valve 1 connects is from blower pump for pipeline 300 outside flow ipe suction booster 300 inner chamber 31 for making direction of flow by inner chamber 31 externally to the feed liquor one-way valve 1 that inner chamber 31 inside is communicated with; Described liquid outlet 35 is provided with and refers to that the Placement of fluid one-way valve 2 is outside from blower pump for pipeline 300 inner chamber 31 outflow conduit suction booster 300 for making direction of flow by inner chamber 31 inside to the fluid one-way valve 2 of inner chamber 31 ft connection.
The working procedure of blower pump for pipeline 300: as shown in Figure 4 and Figure 5, first need the fluid be pressurized to enter in inner chamber 31 by feed liquor one-way valve 1, described fluid refers to liquid or gas; Then hydraulic oil or gas is passed into by the oil connection 8 that valve gap 7 is arranged, hydraulic oil or gas flow in the cavity of Telescopic container 5, because one end of Telescopic container 5 and valve gap 7 are tightly connected, the other end seals, therefore when the cavity inherence of Telescopic container 5 is filled with hydraulic oil or gas, Telescopic container 5 expands, and Telescopic container 5 extends thus is squeezed in the fluid in inner chamber 31, thus realizes pressurization to the fluid in inner chamber 31.Fluid after pressure increase flows out inner chamber 31 by liquid outlet opening 33 through fluid one-way valve 2; Thus realize the supercharging of convection cell.Because Telescopic container 5 has stretchability, after pressurization completes, namely when the pressure transducer 700 that pressure control unit 500 receives detects and the pipeline pressure value ﹥ reference value passed over time, suction booster in pipe pressurizing pump drive 400 quits work, hydraulic oil or gas just stop passing in Telescopic container 5 cavity, hydraulic oil or gas are refluxed by oil connection 8 simultaneously, in Telescopic container 5, hydraulic oil or gas reduce gradually, Telescopic container 5 is retracted to reset condition gradually, now fluid enters into inner chamber 31 by feed liquor one-way valve 1, after being full of inner chamber 31, oil connection 8 passes into hydraulic oil or gas, repeat the process that convection cell carries out pressurizeing.Telescopic container 5 expands and recovers once, completes a pulse-pressure of convection cell.The space of storing fluid in inner chamber 31 is reduced by the expansion of Telescopic container 5, thus realize the pressurization of convection cell, avoid when realizing convection cell pressurization by the mobile space reducing storing fluid of piston in traditional plunger pump, sealing is needed between piston and the inwall of inner chamber of cylinder block, and can relative sliding, require higher, working life is short simultaneously.Adopt shell Expansion container 5, can increase the service life, reduce manufacture cost.
In above process, can by regulating the pressure of hydraulic oil or the gas entered in Telescopic container 5 thus regulating blower pump for pipeline 300 pairs of inner chamber 31 inner fluid applied pressures; Thus the pressure of inner chamber 31 inner fluid is reached need reference value.
In sum, the blower pump for pipeline 300 of pressurization system of the present invention is by arranging Telescopic container 5 in the inner chamber 31 of cylinder body 3, by passing into the gas or liquid with pressure in Telescopic container 5, Telescopic container 5 is expanded, thus the gap between Telescopic container 5 and inner chamber 31 is reduced, fluid in compression inner chamber 31, thus realize the pressurization of convection cell.Pressure provides solution or atmosphere storage in Telescopic container 5 simultaneously, and avoiding pressure provides solution or gas leakage in pressurized fluid, and convection cell damages.This blower pump for pipeline 300, structure is simple, simple to operate; Liquid driven or gas-powered can be realized, driving mode variation simultaneously.Therefore, the blower pump for pipeline 300 of pressurization system of the present invention, can save the manufacture cost of blower pump for pipeline 300, simplify the operation, and improves the adaptability of blower pump for pipeline 300, extends working life.
In order to improve pumping efficiency, making pressurization evenly, as preferred embodiment, in the inner chamber 31 of described blower pump for pipeline 300, being provided with piston 4; Described piston 4 is slidably matched with inner chamber 31; Described Telescopic container 5 is between piston 4 and valve gap 7, and described Telescopic container 5 one end and valve gap 7 are tightly connected, and the other end and piston 4 are tightly connected.
Piston 4 is provided with in described inner chamber 31; Described piston 4 and inner chamber 31 are slidably matched and refer to that piston 4 can move in inner chamber 31, and and gapless between the inwall of inner chamber 31.
Telescopic container 5 is provided with between described piston 4 and valve gap 7; Described Telescopic container 5 has cavity; Described Telescopic container 5 one end and valve gap 7 are tightly connected, and the other end and piston 4 are tightly connected and refer to that one end of Telescopic container 5 is connected with valve gap 7, and the cavity of this end is sealed by valve gap 7, and the other end is connected with piston 4, and the cavity of the other end is sealed by piston 4.Therefore can by the motion of the extension and contraction control piston 4 of Telescopic container 5; By the motion of control piston 4, the gap length between the bottom of control piston 4 and inner chamber 31; Thus regulate the pressure entering the fluid of blower pump for pipeline 300 inner chamber 31.
If piston 4 is not connected with Telescopic container 5; So when blower pump for pipeline 300 is by when placing as shown in Figure 4, piston 4 can self gravitation do with under contact with the bottom of inner chamber 31, when fluid enters into inner chamber 31 by feed liquor one-way valve 1, the gravity of piston 4 can apply a pressure by automatic convection cell, cause pressure cannot carry out controlling, make fluid cannot keep the pressure of self simultaneously after entering blower pump for pipeline 300.In order to avoid there is above-mentioned situation, be therefore provided with Telescopic container 5, thus piston 4 is connected with valve gap 7, between ensureing bottom piston 4 and inner chamber 31, there is a primary clearance.Thus ensure that fluid pressure after entering inner chamber 31 remains unchanged, just can implement supercharging when starting blower pump for pipeline 300.
In working procedure, because inner chamber 31 is divided into two-part by described piston 4, in inner chamber 31 wherein between piston 4 and valve gap 7, Telescopic container 5 is set, positioned by Telescopic container 5 pairs of pistons 4, store fluid or gas that pressure is provided in Telescopic container 5 simultaneously, by passing into gas or the liquid of different pressures in Expansion container 5 cavity, Telescopic container 5 is expanded and drives piston 4 to move, thus the gap reduced bottom inner chamber 31 and between piston 4, realize pressurizeing to the fluid bottom inner chamber 31 and between piston 4.
In order to make Telescopic container 5 in the process of work, Telescopic container 5 can not change on occurrence positions in the inner chamber 31 of cylinder body 3.Further, as shown in Figure 4, the valve gap 7 of described blower pump for pipeline 300 is provided with boss 71; Described boss 71 is provided with abutment sleeve 6; The cavity of described Telescopic container 5 coordinates with abutment sleeve 6 outer peripheral surface.Abutment sleeve 6 is set on boss 71 is coordinated with Telescopic container 5 by abutment sleeve 6 by arranging boss 71 on valve gap 7, thus the fixing position of Telescopic container 5 in inner chamber 31.Avoid blower pump for pipeline 300 Telescopic container 5 appearance displacement in the course of the work, improve the stability that blower pump for pipeline 300 works.
Telescopic container 5 Main Function of described blower pump for pipeline 300 is that Telescopic container 5 can realize extending or shrinking when the volume of the hydraulic oil in Telescopic container 5 or gas changes.Telescopic container 5 also can be able to be have flexible container for telescopic pipe; Wherein a kind of optimal way is the Telescopic container 5 of described blower pump for pipeline 300 is bellows.Operationally, under the effect of internal pressure, bellows will extend along tube length direction known bellows, make movable end produce the displacement becoming certain relation with pressure.Pass through in bellows, pass into the hydraulic oil or gas with pressure in blower pump for pipeline 300 working procedure by the above-mentioned character of bellows, thus make bellows drive piston 4 displacement, realize the pressurization of convection cell.Bellows highly sensitive, when less change appears in the fluid pressure in bellows or volume, bellows also can extend or shorten; Thus improve the precision that blower pump for pipeline 300 regulates hydrodynamic pressure.Bellows easily obtains simultaneously, and cost is lower.
Described feed liquor one-way valve 1 and fluid one-way valve 2 can be common one-way valve, and feed liquor one-way valve 1 Main Function is make in flow ipe suction booster 300, to realize one-way flow by the fluid of liquid entering hole 34.The Main Function of fluid one-way valve 2 can only be flowed out by liquid outlet 35 for making fluid in blower pump for pipeline 300, realizes one-way flow.
As preferred embodiment, as shown in Figure 4: the feed liquor one-way valve 1 of described blower pump for pipeline 300 comprises liquid inlet joint 11, feed liquor valve body 12; Described feed liquor valve body 12 has the airtight feed liquor valve pocket in one end; The sealed end of described feed liquor valve pocket is the bottom of feed liquor valve pocket; The other end of described feed liquor valve pocket coordinates with liquid inlet joint 11; Described liquid inlet joint 11 is provided with the passage being communicated with feed liquor valve pocket; Feed liquor spool 13 is provided with in described feed liquor valve pocket; The first spring 14 is provided with, the passage between the airtight described liquid inlet joint 11 of described feed liquor spool 13 and feed liquor valve pocket between bottom described feed liquor spool 13 and feed liquor valve pocket; Described feed liquor spool 13 is provided with the passage being communicated with feed liquor spool 13 both sides feed liquor valve pocket, the bottom of described feed liquor valve pocket is provided with the passage being communicated with inlet opening 32.
In feed liquor one-way valve 1 working procedure: when fluid enters inner chamber 31 by feed liquor one-way valve 1, first fluid enters into liquid inlet joint 11, under the effect of fluid pressure itself, fluid forces feed liquor spool 13 compresses the first spring 14 and moves, feed liquor spool 13 is made to occur gap with between passage liquid inlet joint 11 being communicated with feed liquor valve pocket, fluid enters into feed liquor valve pocket by passage liquid inlet joint 11 being communicated with feed liquor valve pocket, then in the valve pocket between being flow into bottom feed liquor spool 13 and feed liquor valve pocket by the passage on feed liquor spool 13, flow in the inner chamber 31 of blower pump for pipeline 300 finally by the passage arranged bottom feed liquor valve pocket.
As preferred embodiment, as shown in Figure 4: the fluid one-way valve 2 of described blower pump for pipeline 300 comprises fluid joint 21, fluid valve body 22; Described fluid valve body 22 has the airtight fluid valve pocket in one end; The sealed end of described fluid valve pocket is the bottom of fluid valve pocket; The other end of described fluid valve pocket coordinates with fluid joint 21; Described fluid joint 21 is provided with the passage being communicated with fluid valve pocket; Fluid spool 23 is provided with in described fluid valve pocket; The bottom of described fluid valve pocket is provided with the passage being communicated with liquid outlet opening 33, is provided with the second spring 24, the passage between the airtight described fluid valve pocket of described fluid spool 23 and liquid outlet opening 33 between described fluid spool 23 and fluid joint 21; Described fluid spool 23 is provided with the passage being communicated with fluid spool 23 both sides fluid valve pocket.
In fluid one-way valve 2 working procedure: fluid is flowed out by inner chamber 31, first the upper passage being communicated with liquid outlet opening 33 bottom fluid valve pocket, under the effect of hydrodynamic pressure, promote fluid spool 23 drives the second spring to move, thus make fluid spool 23 with bottom fluid valve pocket on be communicated with liquid outlet opening 33 passage between there is gap, fluid enters in fluid valve pocket by gap, again by the passage of the connection fluid spool 23 both sides fluid valve pocket of setting on fluid spool 23, flow into from the gap between fluid spool 23 and the bottom of fluid valve pocket in the gap between fluid spool 23 and fluid joint 21, and then flowed out by the passage of the connection fluid valve pocket that fluid joint 21 is arranged.
As preferred embodiment, described LNG storage tank 100 is provided with economic valve 130; Described economic valve 130 is communicated with LNG storage tank 100 and throttle valve 200.Owing to being provided with economic valve 130, when the pressure in LNG storage tank 100 higher than specified value and also do not arrive start the force value of safety valve time, just can be transported on liquid feeding pipeline by the fluid in LNG storage tank 100 by economic valve 130 makes it be utilized, can reduce the pressure in LNG storage tank 100 on the one hand, the opposing party can reduce the waste of LNG.
The controlling method of the pressurization system be arranged on LNG liquid feeding pipeline of the present invention, comprises the following steps:
A, on pressure control unit 500, preset the reference value of pipeline pressure;
B, pressure transducer 700 testing pipes pressure, and the pipeline pressure detected is transferred to pressure control unit 500;
The pipeline pressure value that pressure transducer 700 detects by C, pressure control unit 500 compares with the reference value preset; When checkout value≤reference value, pressure control unit 500 controls blower pump for pipeline drive unit 400 and starts, and pipe pressurizing pump drive 400 drives blower pump for pipeline 300 to work; When checkout value ﹥ reference value, pressure control unit 500 controls blower pump for pipeline drive unit 400 and quits work, and blower pump for pipeline 300 is in normally open.
Such as, the reference value that pressure control unit 500 is preset pipeline pressure is 0.8MPa, when the pressure transducer 700 that pressure control unit 500 receives detect and vaporizer 600 steam output end passed over pipeline pressure value≤0.8MPa time, pressure control unit 500 controls blower pump for pipeline drive unit 400 and starts, LNG from throttle valve 200 out after, directly enter blower pump for pipeline 300, under the pressurization of blower pump for pipeline 300, supercharging and atomization are carried out to LNG liquid, make LNG be atomized under the pressure condition being not less than 1MPa laggard enter vaporizer 600 vaporize after, successively through pressure maintaining valve 800, motor 120 is entered after knock out drum 900 and stop valve 110, motor 120 is made to obtain stable supply gas pressure, when the pressure transducer 700 that pressure control unit 500 receives detect and vaporizer 600 steam output end passed over pipeline pressure value ﹥ 0.8MPa time, pressure control unit 500 controls blower pump for pipeline drive unit 400 and quits work, blower pump for pipeline 300 is in normally open, LNG from throttle valve 200 out after, directly flow through blower pump for pipeline 300, after flowing into vaporizer 600 vaporization from the outlet end of blower pump for pipeline 300, after pressure maintaining valve 800, knock out drum 900 and stop valve 110, enter motor 120 successively.
Claims (10)
1. be arranged on the pressurization system on LNG liquid feeding pipeline, described LNG liquid feeding pipeline, comprise throttle valve (200), vaporizer (600) and pressure maintaining valve (800), described throttle valve (200) and vaporizer (600) are by pipeline communication, and described vaporizer (600) and pressure maintaining valve (800) pass through pipeline communication, it is characterized in that: described pressurization system comprises blower pump for pipeline (300), pipe pressurizing pump drive (400), pressure control unit (500) and pressure transducer (700), described pressure transducer (700) is arranged on the pipeline between described vaporizer (600) and described pressure maintaining valve (800), described pressure transducer (700) is also connected with the input end of described pressure control unit (500), the output terminal of described pressure control unit (500) is connected with the input end of described pipe pressurizing pump drive (400), the output terminal of described pipe pressurizing pump drive (400) is connected with described blower pump for pipeline (300), the liquid feeding end of described blower pump for pipeline (300) is connected with the outlet end of described throttle valve (200), the outlet end of described blower pump for pipeline (300) is connected with the liquid feeding end of described vaporizer (600).
2. be arranged on the pressurization system on LNG liquid feeding pipeline as claimed in claim 1, it is characterized in that: described blower pump for pipeline (300) comprises cylinder body (3) and valve gap (7); Described cylinder body (3) has the inner chamber (31) that one end is closed; One end that described inner chamber (31) is closed is the bottom of inner chamber (31); Described inner chamber (31) bottom is provided with inlet opening (32) and the liquid outlet opening (33) of communication with cavity (31); Described cylinder body (3) is provided with liquid entering hole (34) and liquid outlet (35); Described liquid entering hole (34) is communicated with inlet opening (32), and described liquid outlet (35) is communicated with liquid outlet opening (33);
Described liquid entering hole (34) is provided with the feed liquor one-way valve (1) be communicated with externally to inner chamber (31) inside by inner chamber (31); Described liquid outlet (35) is provided with by the inner fluid one-way valve (2) to inner chamber (31) ft connection of inner chamber (31);
Described valve gap (7) is arranged on the inner chamber (31) of the upper sealed cylinder block (3) of cylinder body (3); Telescopic container (5) is provided with in described inner chamber 31; Described Telescopic container (5) has cavity; One end and the valve gap (7) of described Telescopic container (5) are tightly connected, and the other end seals; Described valve gap (7) is provided with the oil connection (8) being communicated with Telescopic container (5) cavity, the output terminal of described pipe pressurizing pump drive (400) is connected with described blower pump for pipeline (300) by described oil connection (8).
3. be arranged on the pressurization system on LNG liquid feeding pipeline as claimed in claim 2, it is characterized in that: in the inner chamber (31) of described blower pump for pipeline (300), be provided with piston (4); Described piston (4) and inner chamber (31) are slidably matched; Described Telescopic container (5) is positioned between piston (4) and valve gap (7), described Telescopic container (5) one end and valve gap (7) are tightly connected, and the other end and piston (4) are tightly connected.
4. be arranged on the pressurization system on LNG liquid feeding pipeline as claimed in claim 3, it is characterized in that: the valve gap (7) of described blower pump for pipeline (300) is provided with boss (71); Described boss (71) is provided with abutment sleeve (6); The cavity of described Telescopic container (5) coordinates with abutment sleeve (6) outer peripheral surface.
5. be arranged on the pressurization system on LNG liquid feeding pipeline as claimed in claim 4, it is characterized in that: the Telescopic container (5) of described blower pump for pipeline (300) is bellows.
6. the pressurization system be arranged on LNG liquid feeding pipeline any one of claim 2 to 5 as described in claim, is characterized in that: the feed liquor one-way valve (1) of described blower pump for pipeline (300) comprises liquid inlet joint (11), feed liquor valve body (12); Described feed liquor valve body (12) has the airtight feed liquor valve pocket in one end; The sealed end of described feed liquor valve pocket is the bottom of feed liquor valve pocket; The other end of described feed liquor valve pocket coordinates with liquid inlet joint (11); Described liquid inlet joint (11) is provided with the passage being communicated with feed liquor valve pocket; Feed liquor spool (13) is provided with in described feed liquor valve pocket; The first spring (14) is provided with, the passage between the airtight described liquid inlet joint (11) of described feed liquor spool (13) and feed liquor valve pocket between bottom described feed liquor spool (13) and feed liquor valve pocket; Described feed liquor spool (13) is provided with the passage being communicated with feed liquor spool (13) both sides feed liquor valve pocket, the bottom of described feed liquor valve pocket is provided with the passage being communicated with inlet opening (32).
7. the pressurization system be arranged on LNG liquid feeding pipeline any one of claim 2 to 6 as described in claim, is characterized in that: the fluid one-way valve (2) of described blower pump for pipeline (300) comprises fluid joint (21), fluid valve body (22); Described fluid valve body (22) has the airtight fluid valve pocket in one end; The sealed end of described fluid valve pocket is the bottom of fluid valve pocket; The other end of described fluid valve pocket coordinates with fluid joint (21); Described fluid joint (21) is provided with the passage being communicated with fluid valve pocket; Fluid spool (23) is provided with in described fluid valve pocket; The bottom of described fluid valve pocket is provided with the passage being communicated with liquid outlet opening (33), the second spring (24) is provided with, the passage between the airtight described fluid valve pocket of described fluid spool (23) and liquid outlet opening (33) between described fluid spool (23) and fluid joint (21); Described fluid spool (23) is provided with the passage being communicated with fluid spool (23) both sides fluid valve pocket.
8. the pressurization system be arranged on LNG liquid feeding pipeline any one of claim 1 to 7 as described in claim, is characterized in that: described LNG storage tank (100) is provided with economic valve (130); Described economic valve (130) is communicated with LNG storage tank (100) and throttle valve (200).
9. the pressurization system be arranged on LNG liquid feeding pipeline any one of claim 1 to 8 as described in claim, is characterized in that: described pipe pressurizing pump drive (400) comprises suction booster and solenoid directional control valve.
10. the controlling method being arranged on the pressurization system on LNG liquid feeding pipeline in claim 1 to 9 described in any one, is characterized in that, comprise the following steps:
A, in the upper reference value presetting pipeline pressure of pressure control unit (500);
B, pressure transducer (700) testing pipes pressure, and the pipeline pressure detected is transferred to pressure control unit (500);
The pipeline pressure value that pressure transducer (700) detects by C, pressure control unit (500) compares with the reference value preset; When checkout value≤reference value, pressure control unit (500) controls blower pump for pipeline drive unit (400) and starts, and pipe pressurizing pump drive (400) drives blower pump for pipeline (300) work; When checkout value ﹥ reference value, pressure control unit (500) controls blower pump for pipeline drive unit (400) and quits work, and blower pump for pipeline (300) is in normally open.
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| CN201410705342.3A CN104481739B (en) | 2014-11-27 | 2014-11-27 | Pressure charging system and its control method on LNG liquid feeding pipelines |
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| CN201410705342.3A CN104481739B (en) | 2014-11-27 | 2014-11-27 | Pressure charging system and its control method on LNG liquid feeding pipelines |
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| CN108730661A (en) * | 2018-08-15 | 2018-11-02 | 河北科瑞达仪器科技股份有限公司 | A kind of pipeline liquid detecting structure that can be flowed back |
| CN109915731A (en) * | 2019-04-02 | 2019-06-21 | 中国石油工程建设有限公司 | A kind of big drop lpg pipeline pressure protective system and method |
| CN110939531A (en) * | 2018-09-21 | 2020-03-31 | 罗伯特·博世有限公司 | Fuel delivery device for internal combustion engine |
| CN111637104A (en) * | 2020-04-22 | 2020-09-08 | 北京精密机电控制设备研究所 | Coaxial modular design's three-redundancy electro-static pressure servo mechanism |
| CN111720733A (en) * | 2019-03-21 | 2020-09-29 | 长春致远新能源装备股份有限公司 | Intelligent pressurization system for liquefied natural gas supply module assembly |
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| CN112963735A (en) * | 2021-01-29 | 2021-06-15 | 烟台杰瑞石油装备技术有限公司 | Fuel pressurization control method and system of LNG (liquefied Natural gas) burning equipment |
| CN113124315A (en) * | 2021-04-30 | 2021-07-16 | 常州易控汽车电子股份有限公司 | LNG pressure boost control system |
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| CN113124315A (en) * | 2021-04-30 | 2021-07-16 | 常州易控汽车电子股份有限公司 | LNG pressure boost control system |
| CN113639202A (en) * | 2021-08-09 | 2021-11-12 | 烟台杰瑞石油装备技术有限公司 | Pumping equipment and control method thereof |
| CN113639202B (en) * | 2021-08-09 | 2024-08-13 | 烟台杰瑞石油装备技术有限公司 | Pumping equipment and control method thereof |
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