CN107165746B - Bypass type externally-guided gas injection valve with floating valve seat - Google Patents
Bypass type externally-guided gas injection valve with floating valve seat Download PDFInfo
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- CN107165746B CN107165746B CN201710504600.5A CN201710504600A CN107165746B CN 107165746 B CN107165746 B CN 107165746B CN 201710504600 A CN201710504600 A CN 201710504600A CN 107165746 B CN107165746 B CN 107165746B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention aims to provide the bypass type externally-guided gas injection valve with the floating valve seat, which has the advantages that the reverse leakage function caused by unbalanced internal and external pressure of the gas injection valve is avoided through the floating valve seat structure, and the working reliability of the gas injection valve is ensured; the air inlet and the flow guiding process are realized through the bypass structure and the flow guiding cavity structure; the control of the valve core and the control of the gas path are realized through the control of the actuator, so that the gas injection function of the gas valve is realized; the outer guide structure is matched with the pressure balance hole and the pressure balance groove, so that the perpendicularity of the valve core is ensured, the stable work and the reliable work of air flow are realized, and the high response speed is realized; the high flow is realized by the mixed air inlet mode of direct air inlet of the axial main air groove and air inlet of the circumferential air-filling holes, the air supply efficiency of the engine is effectively improved, meanwhile, the air flow interference can be avoided, and the stability of an air path is realized; the surface sealing and high reliability of the gas injection valve are realized through the multi-channel annular band structure between the valve core and the valve seat.
Description
Technical Field
The invention relates to a gas injection valve, in particular to a gas injection valve of a natural gas engine.
Background
Natural gas burns cleanly and has abundant reserves in China, making it the most likely fuel to replace diesel. The natural gas engine has good application prospect as ship power, in particular as the propulsion power of inland river ships. As a fuel supply device of a natural gas engine, the performance of a gas injection valve directly determines the economy and emission performance of the natural gas engine. At present, the natural gas engine always has the condition of insufficient gas supply under the full working condition state, so that the phenomenon of unstable rotating speed of the engine under the full working condition operation is caused, and the phenomenon is more serious on a high-power engine, so that the normal use of the engine and the performance of the engine are seriously influenced. Under the condition of severe engine working conditions, the injection valve is easy to generate reverse leakage. Therefore, it is necessary to design an injection valve having a reverse leakage preventing function. Meanwhile, a high-flow gas injection valve with high response speed, high control precision and good reliability needs to be developed, so that the circulation capacity of the high-flow gas injection valve can meet the normal working requirement of a natural gas engine in a high-load state.
Disclosure of Invention
The invention aims to provide the bypass type externally-guided gas injection valve with the floating valve seat, which has the advantages of high response speed, high control precision, high reliability, stable gas pressure, high-efficiency sealing, high flow and reverse leakage prevention.
The purpose of the invention is realized in the following way:
the invention relates to a bypass type externally-guided gas injection valve with a floating valve seat, which is characterized in that: the valve comprises a valve body, an electromagnet, a valve core assembly and a floating valve seat, wherein the electromagnet is arranged on the valve body, the floating valve seat is arranged in the valve body, a valve space is formed among the electromagnet, the valve body and the floating valve seat, and a coil is wound in the electromagnet and an annular groove is formed; the valve core assembly comprises an armature, a spring seat, a bottom plate and a valve core, wherein the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, two ends of a return spring are respectively arranged in the annular groove of the electromagnet and the annular groove of the spring seat, a pressure balance hole is arranged at the center of the armature, a pressure balance groove is arranged on the bottom plate, the valve core is of a hollow structure, the pressure balance hole, the pressure balance groove and the hollow part of the valve core are communicated, a valve seat return spring is arranged in the hollow part of the valve core, a sealing ring belt and a rib are arranged on the valve core, the sealing ring belt forms an annular cavity, an axial main air groove is arranged on the upper surface of the valve core, a circumferential air supplementing hole is arranged on the rib, and a flow guiding cone angle is arranged at the air supplementing hole; the floating valve seat comprises a guide base and a valve seat, wherein the guide base is fixed in the valve body, the valve seat is positioned below the valve core, a T-shaped structure is arranged on the inner ring of the guide base, the outer ring of the valve seat is arranged in the guide base through the T-shaped structure matched with the outer ring of the valve seat, two ends of a valve seat reset spring are respectively fixed on the valve seat and the valve core, an air outlet ring belt and a guide block are arranged on the valve seat, the guide block is positioned around the valve core, the air outlet ring belt is positioned below the annular cavity, and an air outlet is arranged below the air outlet ring belt.
The invention may further include:
1. the double air leakage preventing structure is arranged between the valve seat and the guide base, the deformable sealing ring is arranged above the joint of the valve seat and the guide base, the pressing gasket is additionally arranged above the inner edge of the deformable sealing ring, the two layers of sealing rubber rings are arranged at the joint of the T-shaped structure of the valve seat and the guide base, and the elastic gasket is arranged at the joint of the T-shaped structure of the valve seat and the guide base.
2. The valve body is provided with a protruding part, the protruding part is provided with an air inlet, a flow guiding cavity is arranged in the valve body below the air inlet, and the air inlet is communicated with the flow guiding cavity; the air flows into the valve body vertically through the air inlet, flows into the valve body along the flow guide cavity, and after the coil is electrified, the armature drives the valve core to move upwards to be separated from the surface of the valve seat, the air passage is opened, the electromagnetic valve is opened, the air flows in a mixed air inlet mode of the axial main air groove and the circumferential air filling hole, passes through the annular cavity, and finally flows out vertically through the air outlet; after the coil is powered off, under the action of a return spring between the electromagnet and the spring seat, the armature moves downwards to drive the valve core to move downwards until the surface of the valve core is attached to the surface of the valve seat, the initial position is restored, the air passage is closed, and the electromagnetic valve is closed.
The invention has the advantages that: the invention adopts a structure with the floating valve seat, can effectively prevent the reverse leakage of the gas injection valve, has the function of shock absorption, and ensures the working reliability and safety of the gas injection valve; the air inlet and the flow guiding process are realized through the bypass structure and the flow guiding cavity structure; the control of the valve core and the control of the gas path are realized through the control of the actuator, so that the gas injection function of the gas valve is realized; the outer guide structure is matched with the pressure balance hole and the pressure balance groove, so that the perpendicularity of the valve core is ensured, fluctuation of the gas pressure in the gas injection valve can be effectively restrained, stable operation of gas flow is realized, reliable operation is realized, and high response speed is realized; the high flow is realized by the mixed air inlet mode of direct air inlet of the axial main air groove and air inlet of the circumferential air-filling holes, the air supply efficiency of the engine is effectively improved, meanwhile, the air flow interference can be avoided, and the stability of an air path is realized; the surface sealing and high reliability of the gas injection valve are realized through the multi-channel annular band structure between the valve core and the valve seat.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a valve core assembly according to the present invention;
FIG. 3 is a schematic diagram of the gas path of the present invention;
FIG. 4 is an enlarged view of a floating valve seat structure;
FIG. 5 is a top view of the valve core structure;
FIG. 6 is a three-dimensional block diagram of a valve core structure;
FIG. 7 is a floating valve seat force diagram.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
with reference to fig. 1-7, fig. 1 is a schematic diagram of the overall structure of the bypass type externally guided gas injection valve with a floating valve seat, which mainly comprises an electromagnet 1, a coil 2, a return spring 3, a valve core assembly 5, a valve body 6 and a floating valve seat 7. The electromagnet 1 is fixed on the valve body 6 through a fixing bolt 8, the coil 2 is wound in a ring groove in the electromagnet 1, and the valve core assembly 5 and the floating valve seat 7 are sequentially arranged below the electromagnet 1 from top to bottom.
As shown in fig. 2, the valve core assembly 5 of the bypass type external guide gas injection valve with the floating valve seat mainly comprises an armature 10, a spring seat 11, a fastening bolt 19, a gasket 17, a bottom plate 12 and a valve core 13, wherein the armature 10 is connected with the bottom plate 12 and the valve core 13 through the fastening bolt 19, a layer of gasket 17 is arranged between the armature 10 and the bottom plate 12, the spring seat 11 is arranged above the bottom plate 12, the side surface of the inside of the spring seat 11 is contacted with the side surface of the armature 10, two ends of a return spring 3 are respectively positioned in annular grooves of the electromagnet 1 and the spring seat 11, a pressure balance hole 16 is formed in the center of the armature 11, and a certain number of pressure balance grooves 18 are formed in the bottom plate 12, so that the internal and external gas circuit pressures at the armature 10 are more easily balanced, and the response speed of the armature 10 is improved. The pressure balance hole 16 at the center of the armature 11 is matched with the pressure balance groove 18 on the bottom plate 12, so that the inner space of the valve core assembly 5 is communicated with the outer space, the inner and outer gas paths are balanced, the inner and outer gas paths of the valve core assembly 5 have no pressure difference, the valve core 13 is composed of a valve core main body, ribs 14 and a sealing ring belt 15, and the valve core is prevented from being subjected to extra axial force during movement. The valve core assembly 5 is integrally arranged below the electromagnet 1.
As shown in fig. 3, first, the fuel gas flows vertically into the valve body 6 through the intake port 22, and flows along the intake port 25 to fill the interior of the valve body 6. When the coil 2 is not electrified in the working process of the fuel gas injection valve, the valve core assembly 5 is kept motionless at the initial position under the action of the pretightening force of the return spring 3, the lower surface of the sealing ring belt 15 of the valve core 13 in the valve core assembly 5 is tightly attached to the upper surface of the air outlet ring belt 26 of the valve seat 31, at the moment, the air outlet ring belt 26 is not communicated with the inner space of the valve body 6, and the fuel gas fills the whole space inside the valve body 6 of the fuel gas injection valve. After the coil 2 is electrified, the electromagnet 1 and the armature 10 are magnetized, a magnetic loop is formed between the electromagnet 1 and the armature 10, the armature 10 moves upwards after overcoming the pretightening force of the return spring 3 under the action of electromagnetic force, the valve core 13 is driven to move upwards to be separated from the surface of the valve seat 31 until the upper surface of the spring seat 11 is contacted with the lower surface of the electromagnet 1, and in the whole moving process, the axial movement and the circumferential positioning of the armature 8 are controlled by the cooperation between the 4 guide blocks 21 on the valve seat 31 and the valve core 13. At this time, the air path is opened, the electromagnetic valve is opened, the air rapidly flows in a mixed air inlet mode of the axial main air groove 36 and the circumferential air supplementing holes 25, passes through the multi-channel annular cavity 24, and finally vertically flows out of the air outlet 27; when the coil 2 is powered off, the electromagnetic force applied to the armature 10 disappears, the armature 10 moves downwards under the action of the return spring 7 between the electromagnet 1 and the spring seat 11 to drive the valve core 13 to move downwards until the surface of the valve core 13 is attached to the surface of the valve seat 31, the armature 10 returns to the initial position, the air passage is closed, and the electromagnetic valve is closed.
As shown in fig. 6, the present invention employs a floating valve seat 7 structure in order to prevent reverse leakage of fuel gas and to improve reliability and safety of the fuel gas injection valve. The floating valve seat 7 can lock the electromagnetic valve when the external air pressure and the internal air pressure of the electromagnetic valve are high, so that the reverse leakage of fuel gas is effectively prevented. The floating valve seat 7 is composed of 7 parts: the valve seat comprises a guide base 29, a valve seat 31, a valve seat return spring 35, a sealing rubber ring 30, a pressing gasket 28, a deformable sealing ring 33 and an elastic gasket 34. The guide base 29 is of an integral structure with the valve body 1, and the valve seat 31 is mounted on the guide base 29. The guide base 29 has a T-shaped structure on its inner periphery which mates with the T-shaped structure on the outer periphery of the valve seat 31. The two ends of the valve seat return spring 35 are respectively fixed on the valve seat 31 and the valve core 13, and a certain pretightening force is maintained.
In order to prevent air leakage between the valve seat 31 and the guide base 29, a dual air leakage preventing structure is additionally arranged between the valve seat 31 and the guide base 29, a deformable sealing ring 33 is arranged above the joint of the valve seat 31 and the guide base 29, a pressing washer 28 is additionally arranged above the inner edge and the outer edge of the deformable sealing ring 33, the pressing washer 28 is fixed on the valve seat 31 through a screw 32, the stress of the pressing washer 28 is ensured to be uniform, and the sealing performance is enhanced. The deformable sealing ring 33 is made of deformable soft plastic, so that the movement of the valve seat 31 is not affected. The second double seal is that two layers of sealing rubber rings 30 are additionally arranged at the T-shaped connection part of the valve seat 31 and the guide base 29, so that the tightness is further enhanced. A layer of elastic washer 34 is additionally arranged at the T-shaped connection position between the valve seat 31 and the guide base 29, so that vibration impact force during contact is reduced, and a damping effect is achieved. The reliability of the solenoid valve is effectively increased.
The valve seat 31 is acted by the elastic force F4 of the valve seat return spring 35, the solenoid valve external gas pressures F1 and F2, the solenoid valve internal gas pressure F3, and the pressing force of the spool 13. The valve core 13 is acted by the elastic force of a return spring. When the air pressure below the solenoid valve is greater than the air pressure inside the solenoid valve, the external air pressures F1 and F2 of the solenoid valve act on the lower part of the valve seat 31 and the position of the air outlet ring belt 26 respectively, and the contact area below the valve seat 31 is far greater than that of the air outlet ring belt 26, so that F1 is far greater than F2, and before the external air pressure expands to cause the upward movement of the valve core 13, the external air pressures F1 and F2 overcome the spring pretightening force of the return spring 7, and the valve seat 31 moves upward together with the valve core 13. The valve seat 31 moves upward until the spring seat 14 contacts the electromagnet. At this time, even if the electromagnet is energized, the valve core 13 cannot move upward, and the solenoid valve cannot be opened. The solenoid valve is locked.
When the internal and external air pressures of the solenoid valve are restored to normal, the valve seat 31 moves downward to return to the original position by the valve seat return spring 35. If the electromagnet is electrified at this time, the valve core 13 still keeps still, and the electromagnetic valve is normally opened. When the electromagnetic valve is closed, the electromagnet is powered off, the valve core 13 moves downwards under the action of the return spring 7, and the electromagnetic valve is closed. If the electromagnet is not energized at this time, the valve seat 31 moves downward together with the valve spool 13 back to the original position by the return spring 7, and the solenoid valve remains closed. When the electromagnetic valve is required to be opened, the electromagnet is electrified, the valve core 13 moves upwards under the drive of the armature, and the electromagnetic valve is normally opened.
According to the working process, the bypass type outer guide gas injection valve with the floating valve seat adopts the structure with the floating valve seat 7, so that the reverse leakage of the gas injection valve can be effectively prevented under the condition that the internal and external air pressures of the injection valve are abnormal, the gas injection valve has a damping function, and the working reliability and safety of the gas injection valve are ensured; the air inlet and the flow guiding process are realized through the bypass structure and the air inlet 25 structure; the control of the valve core 13 and the control of the air path are realized through the control of the actuator, so that the air injection function is realized; the perpendicularity of the valve core 13 is ensured through the outer guide structure; the pressure balance hole 16 is formed in the center of the armature 10, a certain number of pressure balance grooves 18 are formed in the bottom plate 12, so that the armature 10 is prevented from being subjected to axial force, the internal and external gas circuit pressures at the armature 10 are more easily balanced, and the response speed of the armature 10 is improved; the structure that a plurality of circumferential air supplementing holes 25 are formed in the rib of the valve core 13, a plurality of annular cavities 24 are formed in the lower surface of the valve core 13 and the upper surface of the valve seat 31, so that the effective flow area is increased, the quality of the valve core 13 and the valve seat 31 is reduced, and the reliability is improved; the flow guide cone angle 20 with a certain angle is arranged at the circumferential air supply hole 25 of the valve core 13, so that the flow loss is reduced, and the flow coefficient is increased; the invention adopts a mixed air inlet mode of directly air inlet of the axial main air groove 36 and air inlet of the circumferential air-filling holes 25, increases the air inlet flow coefficient, realizes large flow, effectively improves the air supply efficiency of the gas injection valve, can avoid air flow interference, and realizes balance and stability of the air path; the multi-seal ring belt 15 and the air outlet ring belt 26 are adopted between the valve core 13 and the valve seat 31, so that the surface seal, the pressure stabilization and the balance of the fuel gas injection valve are realized, the impact can be reduced due to the wider ring belt area, and the reliability is improved.
The technical scheme of the invention is as follows: the bypass type externally guided gas injection valve with floating valve seat consists of electromagnet, coil, reset spring, valve core assembly, valve body and floating valve seat. The electromagnet is fixed on the valve body through a fixing bolt, the coil is wound in an annular groove in the electromagnet, and a valve core assembly and a floating valve seat are sequentially arranged below the electromagnet from top to bottom; the valve core assembly comprises an armature, a spring seat, gaskets, a bottom plate, a clamp spring, a fastening bolt and a valve core, wherein the armature is connected with the bottom plate and the valve core through the fastening bolt, a layer of gaskets is arranged between the armature and the bottom plate, the spring seat is arranged above the bottom plate, the side surface of the inside of the spring seat is contacted with the side surface of the armature, two ends of a reset spring are respectively positioned in annular grooves of the electromagnet and the spring seat, a pressure balance hole is formed in the center of the armature, and a certain number of pressure balance grooves are formed in the bottom plate. The valve core is composed of a valve core main body, ribs and a sealing ring belt, the valve core assembly is integrally arranged below the electromagnet, the ribs of the valve core are provided with circumferential air supply holes, the circumferential air supply holes are provided with flow guide cone angles, the valve core and the floating valve seat adopt the sealing ring belt and the air outlet ring belt, the surface is sealed, the pressure is stabilized and balanced, and the valve core has a wider ring belt area. The valve core is circumferentially fixed on 4 guide blocks on the valve seat, so that the perpendicularity of the valve core is guaranteed, and the valve core moves up and down to be limited by the distance between the spring seat and the iron core. The floating valve seat consists of a guide base, a valve seat reset spring, a sealing rubber ring, a pressing gasket, a deformable sealing ring and an elastic gasket. The method is characterized in that: the guide base is integrated with the valve body, and the valve seat is mounted on the guide base. The guide base inner ring is provided with a T-shaped structure which is matched with the T-shaped structure of the valve seat outer ring. The two ends of the valve seat reset spring are respectively fixed on the valve seat and the valve core, and a certain pretightening force is maintained. A dual air leakage prevention structure is additionally arranged between a valve seat and a guide base, a deformable sealing ring is arranged above the joint of the valve seat and the guide base, and a compression washer is additionally arranged above the inner edge and the outer edge of the deformable sealing ring and is fixed on the valve seat through screws. The deformable sealing ring is made of deformable soft plastic, so that the movement of the valve seat is not influenced. The second double seal is that two layers of sealing rubber rings are additionally arranged at the T-shaped connection part of the valve seat and the guide base.
Claims (3)
1. A bypass type externally-guided gas injection valve with a floating valve seat is characterized in that: the valve comprises a valve body, an electromagnet, a valve core assembly and a floating valve seat, wherein the electromagnet is arranged on the valve body, the floating valve seat is arranged in the valve body, a valve space is formed among the electromagnet, the valve body and the floating valve seat, and a coil is wound in the electromagnet and an annular groove is formed; the valve core assembly comprises an armature, a spring seat, a bottom plate and a valve core, wherein the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, two ends of a return spring are respectively arranged in the annular groove of the electromagnet and the annular groove of the spring seat, a pressure balance hole is arranged at the center of the armature, a pressure balance groove is arranged on the bottom plate, the valve core is of a hollow structure, the pressure balance hole, the pressure balance groove and the hollow part of the valve core are communicated, a valve seat return spring is arranged in the hollow part of the valve core, a sealing ring belt and a rib are arranged on the valve core, the sealing ring belt forms an annular cavity, an axial main air groove is arranged on the upper surface of the valve core, a circumferential air supplementing hole is arranged on the rib, and a flow guiding cone angle is arranged at the air supplementing hole; the floating valve seat comprises a guide base and a valve seat, wherein the guide base is fixed in the valve body, the valve seat is positioned below the valve core, a T-shaped structure is arranged on the inner ring of the guide base, the outer ring of the valve seat is arranged in the guide base through the T-shaped structure matched with the outer ring of the valve seat, two ends of a valve seat reset spring are respectively fixed on the valve seat and the valve core, an air outlet ring belt and a guide block are arranged on the valve seat, the guide block is positioned around the valve core, the air outlet ring belt is positioned below the annular cavity, and an air outlet is arranged below the air outlet ring belt.
2. The bypass externally guided gas injection valve with a floating valve seat of claim 1 wherein: the double air leakage preventing structure is arranged between the valve seat and the guide base, the deformable sealing ring is arranged above the joint of the valve seat and the guide base, the pressing gasket is additionally arranged above the inner edge of the deformable sealing ring, the two layers of sealing rubber rings are arranged at the joint of the T-shaped structure of the valve seat and the guide base, and the elastic gasket is arranged at the joint of the T-shaped structure of the valve seat and the guide base.
3. An externally guided gas injection valve with a floating valve seat according to claim 1 or 2, characterized by: the valve body is provided with a protruding part, the protruding part is provided with an air inlet, a flow guiding cavity is arranged in the valve body below the air inlet, and the air inlet is communicated with the flow guiding cavity; the air flows into the valve body vertically through the air inlet, flows into the valve body along the flow guide cavity, and after the coil is electrified, the armature drives the valve core to move upwards to be separated from the surface of the valve seat, the air passage is opened, the electromagnetic valve is opened, the air flows in a mixed air inlet mode of the axial main air groove and the circumferential air filling hole, passes through the annular cavity, and finally flows out vertically through the air outlet; after the coil is powered off, under the action of a return spring between the electromagnet and the spring seat, the armature moves downwards to drive the valve core to move downwards until the surface of the valve core is attached to the surface of the valve seat, the initial position is restored, the air passage is closed, and the electromagnetic valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504600.5A CN107165746B (en) | 2017-06-28 | 2017-06-28 | Bypass type externally-guided gas injection valve with floating valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504600.5A CN107165746B (en) | 2017-06-28 | 2017-06-28 | Bypass type externally-guided gas injection valve with floating valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107165746A CN107165746A (en) | 2017-09-15 |
| CN107165746B true CN107165746B (en) | 2023-06-09 |
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| CN201710504600.5A Active CN107165746B (en) | 2017-06-28 | 2017-06-28 | Bypass type externally-guided gas injection valve with floating valve seat |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107420227B (en) * | 2017-06-28 | 2023-06-09 | 哈尔滨工程大学 | Bypass type internal guide gas injection valve with floating valve seat |
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| CN107165746A (en) | 2017-09-15 |
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