CN2349365Y - Liquefied petroleum gas pressure-reducing regulator for car engine - Google Patents

Abstract

The utility model relates to a liquefied petroleum gas pressure-reducing regulator for a car engine, comprising a first stage pressure-reducing chamber, a second stage pressure-reducing chamber, a vacuum chamber and a heating chamber. The inner part of the first stage pressure-reducing chamber is provided with a normally open first pressure-reducing valve whose valve lever is provided with a valve on one end, and the other end of the valve lever is matched with a hook arm fixedly connected with a diaphragm controlled by a spring. The inner part of the second stage pressure-reducing chamber is provided with a normally closed second pressure-reducing valve whose valve lever is provided with a valve on one end; the other end of the valve lever is connected with a vacuum diaphragm, and the side back part of the end is connected with a diaphragm controlled by a spring via a diaphragm seat. The other end of the spring is matched with an idle speed regulating mechanism. The utility model improves the sensitivity of regulating air flow and pressure, and the work is safe.

Description

Motor car engine liquefied petroleum gas (LPG) pressure reducing regulator

The utility model relates to a kind of pressure regulator, the particularly motor car engine liquefied petroleum gas (LPG) pressure reducing regulator that can do the motor car engine use of fuel with liquefied petroleum gas (LPG).

In order to alleviate the pollution of motor vehicle emission, exploitation motor car engine gaseous fuel to environment.At present, progressively promoting, the automobile improvement of using single gasoline as fuel is become promptly can be fuel with gasoline, can be the dual-fuel automobile of fuel with liquefied petroleum gas (LPG) again.One of key device that gasoline car is transformed into dual-fuel vehicle is the motor car engine liquefied gas pressure regulator.It is relatively poor with the pressure adjusting sensitivity of liquefied gas pressure regulator to have motor car engine now, and reliable degree is not high, produces gas leak phenomenon when high pressure or the unexpected breakage of low pressure diaphragm appearance.

The purpose of this utility model is to provide a kind of motor car engine liquefied petroleum gas (LPG) pressure reducing regulator, can not only improve tolerance and pressure controlled sensitivity, and reliable operation, when the unexpected breakage of diaphragm, also can not produce gas leak phenomenon.

The utility model is achieved in that a kind of motor car engine liquefied petroleum gas (LPG) pressure reducing regulator, comprise the one-level underpressure chamber and the second depressurized chamber that are provided with intake duct and air outlet flue, and vacuum chamber and heating chamber, pressure loading valve of normal opened type is housed in the one-level underpressure chamber, one time pressure loading valve lever one end is equipped with the valve that matches with intake valve port, the affixed hook arm in its other end and spring controlled diaphragm bottom matches, Normally closed type secondary pressure loading valve is housed in the secondary surge-chamber, secondary pressure loading valve lever one end is installed with the valve that matches with valve base, its the other end and spring controlled vacuum diaphragm are linked together, and be linked together by diaphragm seat and spring controlled secondary decompression diaphragm at this distolateral back side, the other end of its spring matches with the balanced lever of slow running adjustment, the other end of balanced lever matches with the hinged eccentric pressure head of idling adjusting bolt control, match with being supported on the spring that covers down at this distolateral back side, the heating chamber that has water intake and water outlet is being set between one-level underpressure chamber and vacuum chamber.

During the utility model work, the rated high voltage gas that is provided by steel cylinder enters the underpressure chamber one time by intake duct, has realized once decompression.The gas that enters a underpressure chamber still has certain pressure, so overcome the pressure of the diaphragm that once reduces pressure, spring, with diaphragm, together with a upwards expansion of diaphragm hook arm, the moving pressure loading valve lever of last shipper pole of diaphragm hook arm of once reducing pressure is rotated counterclockwise, and the downward exercising result of the other end of lever is closed a pressure loading valve; Enter the gas of a underpressure chamber on the other hand, arrive Normally closed type secondary pressure loading valve through air flue, when engine start (during running), the Carburetor aditus laryngis produces degree of vacuum, forward in the vacuum chamber by pipeline, under the degree of vacuum effect, the vacuum diaphragm flat spring is compressed, secondary pressure loading valve lever moves under the effect of pressure spring and opens the secondary pressure loading valve, and gas enters the secondary underpressure chamber.During the inoperative running of motor, the secondary pressure loading valve is not opened.Along with burning of gas consumption, the gas of a underpressure chamber constantly enters the secondary underpressure chamber by the secondary pressure loading valve.Therefore, the gas flow of a underpressure chamber constantly consumes, pressure constantly reduces, when pressure reaches specified value, do not overcome spring pressure, diaphragm and hook arm move downward so the drive of the diaphragm spring of a underpressure chamber is once reduced pressure, at this moment, pressure loading valve is opened, and along with the unlatching of pressure loading valve, close, realizes decompression.If once reduce pressure diaphragm breakage, once decompression failure, high pressure air directly arrives the secondary pressure loading valve, because the secondary pressure loading valve is normally closed, as long as this moment, motor was inoperative, can not produce high pressure air gas leakage; If secondary decompression diaphragm breakage because the secondary reduction valve is normally closed, can not cause gas leakage yet, it is safe and reliable.During engine idling operation, carry out tolerance by slow running adjustment and regulate control, when needs increase air inflow, to adjust the inside precession of bolt, the top promotion balanced lever front end that promotes eccentric pressure head simultaneously moves downward, balanced lever front end balance spring is compressed, the balanced lever rear end is upturned, the spring of the compression end that promotes secondary pressure loading valve lever that is stressed moves upward, the vacuum diaphragm is compressed, simultaneously, secondary pressure loading valve open amount increases, for engine idling condition improves more gas; To adjust bolt and outwards screw out, situation is opposite, and the gas that provides for engine idling condition reduces.It is rational in infrastructure, has improved tolerance and pressure controlled sensitivity.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A cross-sectional schematic of eccentric pressure head;

Fig. 3 is the B-B sectional view of eccentric pressure head.

Below in conjunction with accompanying drawing the utility model is further described, a kind of motor car engine liquefied petroleum gas (LPG) pressure reducing regulator, comprise the one-level underpressure chamber 2 and the second depressurized chamber 6 that are provided with intake duct 5 and air outlet flue 8, and vacuum chamber 4 and heating chamber 22, pressure loading valve of normal opened type is housed in one-level underpressure chamber 2, one time pressure loading valve lever 24 1 ends are equipped with the valve 23 that matches with intake valve port, the affixed hook arm 26 in diaphragm 1 bottom of its other end and spring 25 controls matches, hook arm 26 is for being fixed in the curb pins of diaphragm 1 bottom, inner and outer clamp clip is the fixing U-shaped plate of an end, interior folder is positioned among the outer folder, match with the gap of curb pins in the end of a pressure loading valve lever 24, spring 25 matches with the pressure-adjusting screw 27 that mounts elastically, motor for different displacements, required liquefied petroleum tolerance difference in unit time, when being used for large-duty engine, need increase system air demand, pressure adjusting screw 27 turns clockwise, spring 25 pretightening forces on the diaphragm 1 are strengthened, at this moment the liquefied petroleum gas (LPG) that enters one-level underpressure chamber 2 must reach higher pressure, just can overcome the pressure of diaphragm 1 upper spring 25 and close pressure loading valve one time, the corresponding like this tolerance that enters second depressurized chamber 6 has also just increased.For the motor of little discharge capacity, adjusting method is opposite.Normally closed type secondary pressure loading valve is housed in secondary surge-chamber 6, secondary pressure loading valve lever 20 1 ends that are hinged on the bearing are installed with the valve 17 that matches with valve base, secondary decompression Regulation spring 19 is installed at the other end middle part, the other end of secondary decompression Regulation spring 19 matches with the adjusting bolt, the vacuum diaphragm 21 of the termination of this end of secondary pressure loading valve lever 20 and spring 3 controls is linked together, and be linked together by the secondary decompression diaphragm 18 of diaphragm seat 11 with spring 12 controls at this distolateral back side, the other end of its spring 12 matches with the balanced lever of slow running adjustment 13, the other end of balanced lever 13 matches with the hinged eccentric pressure head 16 of idling adjusting bolt 15 controls, the section of the pressure head body of eccentric pressure head 16 is that circular arc is tabular, one end of pressure head body is the plane of inclination, the other end is top for the arc that protrudes, the bottom of pressure head body is being provided with the U-shaped engaging lug that has pin-and-hole, match with being supported on the spring 14 that covers down at balanced lever 13 these distolateral back sides, the heating chamber 22 that has water intake and water outlet is being set between one-level underpressure chamber 2 and vacuum chamber 4.Because the liquid gas step-down, gasification need absorb a lot of heats, feeds hot water in heating chamber liquid gas is gasified better, on the floss hole 9 of secondary underpressure chamber 6 escape cock 10 is installed, and is provided with vacuum line 7 on vacuum chamber 4.

Claims (4)

1. motor car engine liquefied petroleum gas (LPG) pressure reducing regulator, comprise the one-level underpressure chamber (2) and second depressurized chamber (6) that are provided with intake duct (5) and air outlet flue (8), and vacuum chamber (4) and heating chamber (22), it is characterized in that in one-level underpressure chamber (2), being equipped with pressure loading valve of normal opened type, one time pressure loading valve lever (24) one ends are equipped with the valve (23) that matches with intake valve port, the affixed hook arm (26) in diaphragm (1) bottom of its other end and spring (25) control matches, Normally closed type secondary pressure loading valve is housed in secondary surge-chamber (6), secondary pressure loading valve lever (20) one ends are installed with the valve (17) that matches with valve base, the vacuum diaphragm (21) of its other end and spring (3) control is linked together, and be linked together by the secondary decompression diaphragm (18) of diaphragm seat (11) with spring (12) control at this distolateral back side, the other end of its spring (12) matches with the balanced lever (13) of slow running adjustment, the other end of balanced lever (13) matches with the hinged eccentric pressure head (16) of idling adjusting bolt (15) control, match with being supported on the spring (14) that covers down at this distolateral back side, the heating chamber (22) that has water intake and water outlet is being set between one-level underpressure chamber (2) and vacuum chamber (4).

2. motor car engine liquefied petroleum gas (LPG) pressure reducing regulator according to claim 1, it is characterized in that hook arm (26) is for being fixed in the curb pins of diaphragm (1) bottom, inner and outer clamp clip is the fixing U-shaped plate of an end, interior folder is positioned among the outer folder, matches with the gap of curb pins in the end of a pressure loading valve lever (24).

3. motor car engine liquefied petroleum gas (LPG) pressure reducing regulator according to claim 1, the section that it is characterized in that the pressure head body of eccentric pressure head (16) is that circular arc is tabular, one end of pressure head body is the plane of inclination, the other end is top for the arc that protrudes, and the bottom of pressure head body is being provided with the U-shaped engaging lug that has pin-and-hole.

4. motor car engine liquefied petroleum gas (LPG) pressure reducing regulator according to claim 1 is characterized in that spring (25) matches with the pressure-adjusting screw that mounts elastically (27).

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