CN206816402U - A kind of outer guiding fuel gas injection valve of through type with floating valve seat - Google Patents

Abstract

The purpose of this utility model is to provide a kind of outer guiding fuel gas injection valve of through type with floating valve seat, pass through floating valve seat structure, realization avoids, due to reverse leakage function caused by fuel gas injection valve external and internal pressure imbalance, ensure that the reliability of fuel gas injection valve work；Air inlet and water conservancy diversion process are realized by bypass structure and water conservancy diversion cavity configuration；The control of valve element is realized by the control of actuator, the control of gas circuit, realizes air injection function；It is engaged by outer guide frame with pressure compensation opening, relief groove, ensures the perpendicularity of valve element, realize the steady operation of air-flow, reliably working, realize high response speed；By the axially mixed admission mode of the main direct air inlet of air drain and circumferential tonifying Qi gas inlet hole, big flow is realized, effectively improves the supply efficiency of engine, while air-flow can be avoided to interfere, realize the stabilization of gas circuit；By valve element and the multiple tracks zonary structure of valve base chamber, the face sealing of fuel gas injection valve, high reliability are realized.

Description

A kind of outer guiding fuel gas injection valve of through type with floating valve seat

Technical field

The utility model relates to the combustion gas of a kind of fuel gas injection valve, specifically natural gas engine gas system Injection valve.

Background technology

Problem of environmental pollution getting worse, discharge index require increasingly strict, demand of the in the market to high-power gas machine Constantly increase.With the use of large-scale gas engine, manufacture, the maintenance and repair of key components and parts, which turn into, restricts gas An important factor for development of engine, fuel gas injection valve are exactly such a key components and parts.Fuel gas injection valve is gaseous fuel electricity One of kernel component of multi-point injection gas machine machine containing double fuel is controlled, each cylinder can be achieved and supply and enter qi leel by stages at regular time and quantity Layer, its service behaviour have highly important influence to the dynamic property of gas machine or dual fuel engine, emission performance.Injection valve needs Will under the bad working environments such as HTHP cumulative activation thousands of hours, and dismantle etc. maintenance work error can be caused progressively to accumulate, Finally injection valve is caused to be difficult to debug.

In the case where engine operating condition is severe, easily there is the situation of reverse leakage in injection valve.Therefore, it is necessary to design one Injection valve of the kind with anti-reverse leakage function.Simultaneously, it is necessary to Development response speed is fast, control accuracy is high, good reliability it is big Flow gas injection valve, its negotiability is set to meet natural gas engine normal work demand at high load conditions.

The content of the invention

The purpose of this utility model be to provide fast response time, fuel gas injection it is stable, it is highly reliable, there is anti-reverse let out Leak a kind of outer guiding fuel gas injection valve of through type with floating valve seat of function.

What the purpose of this utility model was realized in：

A kind of outer guiding fuel gas injection valve of the through type of the utility model with floating valve seat, it is characterized in that：Including valve body, electricity Magnetic executor, valve element assembly, floating valve seat, the electromagnetic actuator include iron core, and iron core is fixed on valve body upper end, in iron core Wound around coil, annular groove is set in iron core；The valve element assembly include armature, spring base, bottom plate, valve element, armature, bottom plate, Valve element arranges while linked together by fastening bolt that spring base is located at outside armature and formed between armature from top to bottom Annular groove, the both ends of back-moving spring are arranged in the annular groove of iron core and the annular groove of spring base, are set at armature center Pressure compensation opening, sets relief groove on bottom plate, and valve element is hollow structure, in pressure compensation opening, relief groove, valve element Empty part is communicated, and valve seat back-moving spring is set in the hollow space of valve element, seal band and rib, seal band shape are set on valve element Into ring cavity, valve element upper surface opens up axially main air drain, circumferential tonifying Qi hole is provided with rib, and diversion angle of cone is set at tonifying Qi hole； The floating valve seat includes guide base, valve seat, and guide base is fixed on the lower section of valve body, and valve seat is located at below valve element, is oriented to Pedestal inner ring is provided with T-shaped structure, and valve seat outer ring is by setting the T-shaped structure coordinated with it to be arranged in guide base, valve seat The both ends of back-moving spring are separately fixed on valve seat and armature, set outlet annulus and guide pad, guide pad to be located at valve on valve seat Around core, outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus.

The utility model can also include：

The 1st, double anti-gas-leak structure is set between valve seat and guide base, the first heavy anti-gas-leak structure is in valve seat and led Installation deformable seal circle above to pedestal junction, deformable seal circle interior edge top install packing washer, the second leakproof again additional Depressed structure is to set two layers of O-ring seal in the T-shaped structure junction of valve seat and guide base, between valve seat and guide base T-shaped structure junction set elastic washer.

2nd, air inlet is formed between the top of iron core and valve body, diversion cavity is formed between the middle and lower part of iron core and valve body, enters Gas port, diversion cavity communicate；Gas is vertically flowed into valve body by air inlet, is flowed into along diversion cavity and is full of valve inner, coil leads to After electricity, motion is separated armature band movable valve plug with valve base surface upwards, and gas circuit is opened, and magnetic valve is opened, and gas is by axially main air drain Flow into the mixed admission mode in circumferential tonifying Qi hole, by ring cavity, finally vertically flowed out by gas outlet；After coil blackout, in iron In the presence of back-moving spring between core and spring base, armature moves downward, band movable valve plug move downward, until spool face with Valve base surface is bonded, and returns to initial position, and gas circuit is closed, closed electromagnetic valve.

Advantage of the present utility model is：The utility model can effectively prevent fuel gas injection valve from the feelings of reverse leakage occur Condition and the function with damping, ensure that the reliability and safety of fuel gas injection valve work；The utility model passes through in armature Center opens pressure compensation opening and a number of relief groove is provided with bottom plate, avoids armature from being made armature by axial force Airline pressure is more easy to reach balance inside and outside place, improves armature response speed；The utility model on four ribs of valve element by opening Circumferential tonifying Qi hole, increase circulation area, reduce valve element quality, improve reliability.Certain angle is set at valve element circumference tonifying Qi hole The outlet annulus of degree, flow losses are reduced, increase discharge coefficient.The utility model is using the axially direct air inlet of main air drain and circumference The mixed admission mode of tonifying Qi gas inlet hole, increase charge flow rate coefficient, increase air inflow, while air-flow can be avoided to interfere, make Gas circuit reaches balance.It is effectively improved the supply efficiency of engine.

Brief description of the drawings

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

Fig. 2 is valve element composite unit structure enlarged drawing of the present utility model；

Fig. 3 is that gas circuit of the present utility model moves towards schematic diagram；

Fig. 4 is valve core structure top view；

Fig. 5 is valve core structure tomograph；

Fig. 6 is floating valve seat schematic enlarged-scale view；

Fig. 7 is floating valve seat force diagram.

Embodiment

Illustrate below in conjunction with the accompanying drawings and the utility model is described in more detail：

With reference to Fig. 1-7, Fig. 1 is the overall structure of outer guiding fuel gas injection valve of the utility model through type with floating valve seat Schematic diagram, including valve body 1, electromagnet 2, valve element assembly 3, floating valve seat 4 four are most of.Electromagnet 2 by upper square thread with Valve body 1 links together.Electromagnet 2 is mainly made up of iron core 5, coil 6.The both sides of iron core 5 are provided with the annular of arrangement back-moving spring 7 Groove.

Valve element assembly 3 shown in Fig. 2 is mainly by armature 8, spring base 10, fastening bolt 14, pad 12, bottom plate 13, valve Core 15 forms.It is characterized in that：Armature 8, pad 12, bottom plate 13 and valve element 15 are linked together by fastening bolt 14, spring base 10 installations are on base 13.Pressure compensation opening 9 is provided with armature 8, a number of relief groove 11 is provided with bottom plate 13, is kept away Exempt from armature 8 by axial force, make airline pressure inside and outside at armature 8 be more easy to reach balance, improve the response speed of armature 8；Reset bullet Spring 7 is between iron core 5 and spring base 10.After coil 6 is powered, iron core 5, armature 8 are magnetized, and are formed between iron core 5 and armature 8 Magnetic loop, armature 8 moves upwards after the pretightning force for overcoming back-moving spring 7 is acted on by electromagnetic force, in whole motion process, rank Iron 8 is axially moved the cooperation between circumferentially positioned 4 guide pads 26 and valve element 15 by valve seat 28 to control realization, Until the upper surface of spring base 10 is in contact with the lower surface of iron core 5, after armature 8 maintains a period of time in the position, coil 6 is disconnected Electricity, the electromagnetic force that armature 8 is subject to are disappeared, and in the presence of the back-moving spring 7 between iron core 5 and spring base 10, armature 8 is transported downwards It is dynamic, until armature 8 comes back to initial position.Open 2 circumferential tonifying Qi holes 17 respectively on four ribs 16 of valve element 15, improve and ring Speed is answered, increases circulation area, while can also reduce quality, improves reliability.Certain angle is set at circumferential tonifying Qi hole 17 Outlet annulus 21, reduce flow losses, increase discharge coefficient.Using axially main 25 direct air inlet of air drain and circumferential tonifying Qi hole 17 The mixed admission mode of air inlet, increase charge flow rate coefficient, increase air inflow, while air-flow can be avoided to interfere, reach gas circuit To balance.Outlet annulus 21, face sealing, voltage stabilizing balance are used between valve element 15 and valve seat 28, and wider annulus area can subtract Shaochong is hit, and improves reliability.

As shown in figure 3, gas is vertically flowed into valve body 1 by air inlet 22, flowed into along diversion cavity 23 full of in valve body 1 Portion, after coil 6 is powered, armature 8 moves upwards after the pretightning force for overcoming back-moving spring 7 is acted on by electromagnetic force, band movable valve plug 15 upward motions are separated with the surface of valve seat 28, and now, gas circuit is opened, and magnetic valve is opened, and gas is by axially main air drain 25 and circumferentially The mixed admission mode in tonifying Qi hole 17 flows into, and by the ring cavity 19 of the crisscross distribution of multiple tracks, is finally vertically flowed out by gas outlet 24；Line The power-off of circle 6, electromagnetic force that armature 8 is subject to disappear, in the presence of the back-moving spring between iron core and spring base 10, armature 8 to Lower motion, band movable valve plug 15 move downward, until the surface of valve element 15 is bonded with the surface of valve seat 28, return to initial position, gas circuit Close, closed electromagnetic valve.

As shown in fig. 6, in order to prevent combustion gas reverse leakage, the reliability and security of fuel gas injection valve, this practicality are improved It is new to employ the structure of floating valve seat 4.Floating valve seat 4 can be when magnetic valve external pressure height be with air pressure inside by electromagnetic valve lock Extremely, it effectively prevent the reverse leakage of combustion gas.Floating valve seat 4 is made up of 7 parts：Guide base 27, valve seat 28 and valve seat are answered Position spring 34, O-ring seal 30, packing washer 32, deformable seal circle 33, elastic washer 29.Guide base 27 is consolidated by bolt It is scheduled on valve body 1, valve seat 28 is arranged on guide base 27.The inner ring of guide base 27 carries T-shaped structure, with the outer ring of valve seat 28 T-shaped structure is engaged.The both ends of valve seat back-moving spring 34 are separately fixed on valve seat 28 and valve element 15, and keep certain pretension Power.

In order to prevent gas leakage between valve seat 28 and guide base 27, installed additional between valve seat 28 and guide base 27 double Anti-gas-leak structure, the first weight anti-gas-leak structure are the installation deformable seal circles above valve seat 28 and the junction of guide base 27 33, the outer of deformable seal circle 33 is pressed in the mounting groove on guide base 27 and valve body 1, passes through guide base 27 and valve body Bolt pretightening between 1 is fixed.Install packing washer 32 above the interior edge of deformable seal circle 33 additional, valve seat is fixed on by screw 31 On 28, packing washer 32 ensures uniform force, strengthens sealing.The material of deformable seal circle 33 uses deformable soft modeling Material, ensures that it does not influence the motion of valve seat 28.Second resealing is installed additional in the T-shaped junction of valve seat 28 and guide base 27 Two layers of O-ring seal 30, further enhances sealing.T-shaped junction between valve seat 28 and guide base 27 has installed one layer additional Elastic washer 29, vibratory impulse power during contact is reduced, serves the effect of damping.Effectively increase the reliable of magnetic valve Property.

Valve seat 28 is by combustion gas inside the elastic force F4 of valve seat back-moving spring 34, magnetic valve the external gas pressure F1 and F2, magnetic valve Pressure F3 and the thrust of valve element 15 effect.Valve element 15 is acted on by back-moving spring elastic force.Air pressure is more than electromagnetism below magnetic valve Valve air pressure inside, magnetic valve the external gas pressure F1, F2 are respectively acting at the lower section of valve seat 28 and outlet annulus 21, under valve seat 28 Square contact area is much larger than outlet annulus 21, and therefore, F1 is much larger than F2, and being expanded in the external gas pressure causes valve element 15 upward Before motion, the external gas pressure F1, F2 overcome the initial tension of spring of back-moving spring 7, and valve seat 28 is upward together with valve element 15 Motion.Valve seat 28 is moved upwardly until that spring base 14 is in contact with electromagnet.Even if now electromagnet is powered, valve element 15 can not yet Motion, magnetic valve can not be opened upwards.Magnetic valve is locked.

When magnetic valve inner and outer air pressure recovers normal, valve seat 28 moves back down in the presence of valve seat back-moving spring 34 It is in situ.If now electromagnet is powered, valve element 15 still remains stationary as, and magnetic valve is normally-open.Electromagnetism when wanting to close magnetic valve Iron powers off, and valve element 15 moves downward in the presence of back-moving spring, closed electromagnetic valve.If now electromagnet is not powered on, valve seat 28 move back down to original position together with valve element 15 in the presence of back-moving spring 7, and magnetic valve remains turned-off.Want to open electromagnetism During valve, electromagnet is powered, and valve element 15 moves upwards under armature drive, and magnetic valve is normally-open.

From the above-mentioned course of work, outer guiding fuel gas injection valve of the utility model through type with floating valve seat 4 uses Structure with floating valve seat 4, it is anti-that it can effectively prevent that fuel gas injection valve from occurring in the case of injection valve inner and outer air pressure exception Situation to leakage and the function with damping, ensure that the reliability and safety of fuel gas injection valve work；Meanwhile this practicality It is new by opening pressure compensation opening 9 at the center of armature 8 and being provided with a number of relief groove 11 on base 13, avoid holding in the mouth Iron 8 is made airline pressure inside and outside at armature 8 be more easy to reach balance, improves the response speed of armature 8 by axial force；In valve element 15 The structure in circumferential tonifying Qi hole 17 is opened on four ribs 16, increases circulation area, reduces the mass of valve element 15, improves reliability.In valve element The outlet annulus 21 of certain angle is set at 15 circumferential tonifying Qi holes 17, reduces flow losses, increases discharge coefficient.The utility model Using the axially mixed admission mode of main 25 direct air inlet of air drain and the circumferential air inlet of tonifying Qi hole 17, increase charge flow rate coefficient, increase Tolerance is added, while air-flow can be avoided to interfere, gas circuit is reached balance.It is effectively improved the supply efficiency of engine.

The technical solution of the utility model：A kind of outer guiding fuel gas injection valve of through type with floating valve seat, it by valve body, Electromagnet, valve element assembly, floating valve seat four are most of to be formed.Electromagnet is linked together by square thread thereon with valve body. Electromagnet is mainly made up of iron core, coil.Iron core both sides are provided with the annular groove of arrangement back-moving spring.Valve element assembly is mainly by holding in the mouth Iron, spring base, fastening bolt, pad, bottom plate, valve element composition.It is characterized in that：Armature, pad, bottom plate and valve element are by fastening spiral shell Bolt is linked together, and spring base is arranged on bottom plate, and a number of relief groove is provided with bottom plate, pressure is carried on armature Balance pipe.Back-moving spring is between iron core and spring base.Open a circumferential tonifying Qi hole respectively on four ribs of valve element.Valve element and Valve base chamber says compression ring band, face sealing, voltage stabilizing balance using three, and has wider annulus area.Valve element it is circumferentially fixed On 4 guide pads on valve seat, ensure its perpendicularity, valve element moves up and down to be limited by the distance between spring base and iron core Position.Floating valve seat is by guide base, valve seat and valve seat back-moving spring, O-ring seal, packing washer, deformable seal circle, elasticity Packing ring forms.It is characterized in that：Guide base is bolted on valve body, and valve seat is arranged on guide base.Guide base Inner ring carries T-shaped structure, is engaged with the T-shaped structure of valve seat outer ring.Valve seat back-moving spring both ends are separately fixed at valve seat and valve On core, and keep certain pretightning force.Double anti-gas-leak structure, the first heavy anti-gas-leak are installed additional between valve seat and guide base Structure is the installation deformable seal circle above valve seat and guide base junction, and deformable seal circle outer is pressed on guiding base In mounting groove on seat and valve body, fixed by the bolt pretightening between guide base and valve body.In deformable seal circle interior edge Side installs packing washer additional, is screwed on valve seat.The material of deformable seal circle uses deformable flexible plastic, ensures It does not influence the motion of valve seat.Second resealing is to have installed two layers of O-ring seal additional in the T-shaped junction of valve seat and guide base.

Claims (3)

1. a kind of outer guiding fuel gas injection valve of through type with floating valve seat, it is characterized in that：Including valve body, electromagnetic actuator, valve Core assembly, floating valve seat, the electromagnetic actuator include iron core, and iron core is fixed on valve body upper end, wound around coil in iron core, iron Annular groove is set in core；The valve element assembly includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are from top to bottom Arrangement is linked together by fastening bolt simultaneously, and spring base is located at outside armature and forms annular groove between armature, is resetted The both ends of spring are arranged in the annular groove of iron core and the annular groove of spring base, and pressure compensation opening is set at armature center, Relief groove is set on bottom plate, valve element is hollow structure, and pressure compensation opening, relief groove, the hollow space of valve element communicate, Valve seat back-moving spring is set in the hollow space of valve element, seal band and rib are set on valve element, seal band forms ring cavity, valve element Upper surface opens up axially main air drain, circumferential tonifying Qi hole is provided with rib, and diversion angle of cone is set at tonifying Qi hole；The floating valve seat Including guide base, valve seat, guide base is fixed on the lower section of valve body, and valve seat is located at below valve element, and guide base inner ring is set There is T-shaped structure, valve seat outer ring is by setting the T-shaped structure coordinated with it to be arranged in guide base, and the two of valve seat back-moving spring End is separately fixed on valve seat and armature, is set outlet annulus and guide pad, guide pad to be located at around valve element on valve seat, is gone out compression ring Band sets gas outlet below ring cavity below outlet annulus.

2. a kind of outer guiding fuel gas injection valve of the through type according to claim 1 with floating valve seat, it is characterized in that：In valve Double anti-gas-leak structure is set between seat and guide base, the first heavy anti-gas-leak structure is on valve seat and guide base junction Side's installation deformable seal circle, deformable seal circle interior edge top install packing washer additional, and the second heavy anti-gas-leak structure is in valve seat Two layers of O-ring seal, the T-shaped structure junction between valve seat and guide base are set with the T-shaped structure junction of guide base Elastic washer is set.

3. a kind of outer guiding fuel gas injection valve of the through type according to claim 1 or 2 with floating valve seat, it is characterized in that： Air inlet is formed between the top of iron core and valve body, diversion cavity, air inlet, diversion cavity are formed between the middle and lower part of iron core and valve body Communicate；Gas is vertically flowed into valve body by air inlet, is flowed into along diversion cavity and is full of valve inner, after coil electricity, armature band Motion is separated movable valve plug with valve base surface upwards, and gas circuit is opened, and magnetic valve is opened, and gas is by axially main air drain and circumferential tonifying Qi hole Mixed admission mode flow into, by ring cavity, finally vertically flowed out by gas outlet；After coil blackout, iron core and spring base it Between back-moving spring in the presence of, armature moves downward, and band movable valve plug moves downward, until spool face and valve base surface paste Close, return to initial position, gas circuit is closed, closed electromagnetic valve.