CN115111452A - Dual self-locking pilot spring-lifting type hydrogen injection valve - Google Patents
Dual self-locking pilot spring-lifting type hydrogen injection valve Download PDFInfo
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- CN115111452A CN115111452A CN202210881346.1A CN202210881346A CN115111452A CN 115111452 A CN115111452 A CN 115111452A CN 202210881346 A CN202210881346 A CN 202210881346A CN 115111452 A CN115111452 A CN 115111452A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/267—Combination of a sliding valve and a lift valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/096—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of hooks hinged about an axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/22—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts
- F16L37/23—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts by means of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/62—Couplings of the quick-acting type pneumatically or hydraulically actuated
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to the technical field of new energy, in particular to a double self-locking pilot spring-rising type hydrogen injection valve. Comprises a left connecting component and a right connecting component; the left connecting assembly comprises a left threaded joint, a left shell, a left spring and a left valve core, the left valve core and the left spring are accommodated in a central through hole of the left shell, and the left threaded joint is connected with the central through hole; the right connecting component comprises a front end locking piece, a right valve core, a locking claw component, a right shell and a right connector, wherein the right valve core is arranged in the right shell, the right end of the front end locking piece is sleeved on the left end of the right valve core and is in sliding fit with the left end of the right valve core, and a low-pressure chamber is formed between the left end of the right valve core and the front end locking piece; the right joint is in threaded connection with the right side end of the right shell to form a high-pressure chamber, and a right spring I and a right spring II are respectively accommodated in the low-pressure chamber and the high-pressure chamber; the locking claw assembly is arranged between the right valve core and the right shell. The invention realizes two-stage self-locking of the joint, and the hydrogenation is carried out from the low-pressure chamber to the high-pressure chamber in a grading way in the hydrogenation process, so that the invention is safer and more reliable.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a double self-locking pilot spring-rising type hydrogen injection valve.
Background
In the process of hydrogenation of the hydrogen energy vehicle, the hydrogenation gun is easily disconnected from the hydrogen injection port of the hydrogen energy vehicle, so that hydrogen is leaked, and unnecessary economic loss and danger are caused; in the process of hydrogen injection, if the pressure is very high at the beginning, impact force can be generated on the hydrogen energy vehicle, and the service life of the hydrogen storage tank is influenced.
Disclosure of Invention
In view of the above problems, the present invention provides a dual self-locking pilot spring-lift hydrogen injection valve, which solves the problems that the existing hydrogenation gun is easily disconnected from the hydrogen injection port of the hydrogen energy vehicle, so as to cause hydrogen leakage, and the service life of the hydrogen storage tank is affected due to the impact force generated on the hydrogen energy vehicle by excessive gas pressure during the hydrogen injection process.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a double self-locking pilot spring-up type hydrogen injection valve, which comprises a left connecting assembly and a right connecting assembly;
the left connecting assembly comprises a left threaded connector, a left shell, a left spring and a left valve core, wherein the right side end of the left shell is of an open structure, the left side end of the left shell is provided with a central through hole, the left valve core and the left spring are sequentially accommodated in the central through hole of the left shell from right to left, the left threaded connector is in threaded connection with the left side end of the central through hole, and the left threaded connector is abutted to the left spring;
the right connecting assembly comprises a front end locking piece, a right spring I, a right valve core, a locking claw assembly, a right shell, a right spring II and a right connector, wherein the left end of the right shell is of an opening structure, the right valve core is arranged in the right shell, the front end locking piece is inserted into an opening in the left side of the right shell, the right end of the front end locking piece is sleeved on the left end of the right valve core and is in sliding fit with the left end of the right valve core, and a low-pressure cavity is formed between the left end of the right valve core and the front end locking piece; the right connector is in threaded connection with the right side end of the right shell, a high-pressure chamber is formed between the right connector and the right valve core in the right shell, a right spring I and a right spring II are respectively accommodated in the low-pressure chamber and the high-pressure chamber, two ends of the right spring I are respectively abutted against the left end and the front end locking piece of the right valve core, and two ends of the right spring II are respectively abutted against the right side end and the right connector of the right valve core; the front end locking piece is used for butting and locking with the left connecting assembly;
an annular groove is reserved between the right valve core and the right shell, the locking claw assembly is arranged in the annular groove, and the locking claw assembly is driven to be closed or opened through axial movement of the right valve core, so that the locking claw assembly is held tightly or the front end locking piece is released.
The central through hole comprises an extension part which extends rightwards along the axial direction, the extension part is of a cylindrical structure, and a locking groove is formed in the outer surface of the extension part.
The left valve core comprises a left valve core body and a left valve core sealing end face, wherein the left valve core sealing end face is arranged at the left end of the left valve core body, and the right end of the left valve core body is provided with a left valve core center blind hole along the axis;
a left valve core annular groove is arranged on the outer circumference of the left end of the left valve core body close to the left valve core sealing end surface, and a plurality of left valve core vent holes communicated with the left valve core central blind hole are formed in the left valve core annular groove;
and an inner sealing spigot is arranged on the inner wall of the extending part, and the left valve core enables the sealing end surface of the left valve core to be in sealing contact with the inner sealing spigot through the elasticity of the left spring.
The front end locking piece comprises a self-locking piece, a self-locking steel ball and a middle valve core, wherein the self-locking piece is of a cylindrical structure, and the middle valve core is accommodated in the self-locking piece and is abutted against the right spring I; a plurality of self-locking steel ball channels are arranged in the side wall of the self-locking piece, and the right end port of each self-locking steel ball channel is communicated with the low-pressure chamber; the left side port of the self-locking steel ball channel is located on the left side of the middle valve core, the self-locking steel ball is contained in the left side port of the self-locking steel ball channel, the outer surface of the self-locking steel ball protrudes out of the outer side of the inner wall of the self-locking piece, and the self-locking steel ball is used for being matched with the locking groove in the extending portion to achieve locking between the left connecting assembly and the right connecting assembly.
The middle valve core comprises a middle valve core body and a middle valve core sealing end face, the middle valve core sealing end face is arranged at the right end of the middle valve core body, a middle valve core central blind hole is formed in the left end of the middle valve core body along the axis, at least one middle valve core annular groove is formed in the outer circumference of the right end, close to the middle valve core sealing end face, of the middle valve core body, and a plurality of middle valve core vent holes communicated with the middle valve core central blind hole are formed in the middle valve core annular groove;
the diameters of the left valve core, the middle valve core and the right valve core are sequentially increased.
The inner wall of the right end of the self-locking piece close to the right valve core is provided with a low-pressure cavity sealing end face, and the middle valve core sealing end face of the middle valve core is in sealing contact with the low-pressure cavity sealing end face to realize the sealing of the low-pressure cavity.
The right valve core comprises a right valve core body and a right valve core sealing end face, wherein the right valve core body is of a cylindrical structure, the right valve core sealing end face is arranged at the right end of the right valve core body, and the left end of the right valve core body is provided with a right valve core central blind hole along the axis; and a right valve core annular groove is formed in the outer circumference of the right end of the right valve core body, which is close to the sealing end face of the right valve core, and a plurality of right valve core vent holes are formed in the right valve core annular groove.
The right shell is internally provided with a shaft hole in sliding fit with the right valve core body, the diameter of the shaft hole is smaller than that of the high-pressure cavity, a high-pressure cavity sealing end face perpendicular to the axis of the shaft hole is arranged at the communication position of the shaft hole and the high-pressure cavity, and the right valve core sealing end face is in sealing contact with the high-pressure cavity sealing end face to seal the high-pressure cavity.
And a locking claw assembly accommodating groove is formed in the inner wall of the left side end of the right shell.
The locking claw assembly comprises at least two locking claws which are symmetrically arranged, the front ends of the locking claws are hook-shaped, and the inner sides of the rear ends of the locking claws are provided with inclined planes; a supporting steel ball is arranged between the outer side surface of the locking claw and the inner wall of the right shell; and a rolling steel ball which is contacted with the inclined plane at the rear end of the inner side of the locking claw is arranged on the outer surface of the right valve core, and when the right valve core moves along the axial direction, the locking claw is pushed to swing around the supporting steel ball through the rolling steel ball.
The invention has the advantages and beneficial effects that: according to the double self-locking pilot spring-rising hydrogen injection valve provided by the invention, the pressure of hydrogen is buffered by the arrangement of the low-pressure cavity and the high-pressure cavity, so that impact force on a hydrogen energy vehicle is avoided, and the service life of a hydrogen storage tank is prolonged.
The invention can realize the first-stage self-locking and the second-stage self-locking of the joint, avoid hydrogen leakage, improve the safety performance of the whole structure, carry out hydrogenation from a low-pressure chamber to a high-pressure chamber in a grading way in the hydrogenation process, have more reasonable structure and are safer in the hydrogenation process.
Drawings
FIG. 1 is a schematic structural view of a dual self-locking pilot spring-lift hydrogen injection valve according to the present invention;
FIG. 2 is a schematic view of a left connecting member according to the present invention;
FIG. 3 is a schematic structural view of the left valve core of the present invention;
FIG. 4 is a schematic view of a right connecting member according to the present invention;
FIG. 5 is a schematic diagram of the construction of the right valve element of the present invention;
FIG. 6 is a schematic structural diagram of a valve core in the present invention;
in the figure: 1 is a left connecting component, 1-1 is a left screwed joint, 1-2 is a gasket, 1-3 is a left shell, 1-4 is a first O-shaped ring, 1-5 is a left spring, 1-6 is an extending part, 1-7 is a left valve core, 1-7-1 is a left valve core body, 1-7-2 is a left valve core central blind hole, 1-7-3 is a left valve core sealing end face, 1-7-4 is a left valve core annular groove, 1-7-5 is a left valve core vent hole, 1-8 is a lock groove, 1-9 is an inner sealing spigot, 2 is a right connecting component, 2-1 is a self-locking piece, 2-2 is a self-locking steel ball, 2-3 is a middle valve core, 2-3-1 is a middle valve core body, 2-3-2 is a middle valve core central blind hole, 2-3-3 is a sealing end face of the middle valve core, 2-3-4 is an annular groove of the middle valve core, 2-3-5 is a vent hole of the middle valve core, 2-4 is a right spring I, 2-5 is a locking claw, 2-6 is a second O-ring, 2-7 is a right valve core, 2-7-1 is a right valve core body, 2-7-2 is a central blind hole of the right valve core, 2-7-3 is a sealing end face of the right valve core, 2-7-4 is an annular groove of the right valve core, 2-7-5 is a vent hole of the right valve core, 2-8 is a rolling steel ball, 2-9 is a supporting steel ball, 2-10 is a third O-ring, 2-11 is a right shell, 2-12 is a right spring II, 2-13 is a right joint, 2-14 is a right gasket, 2-15 are low pressure cavity sealing end faces, 2-16 are high pressure cavity sealing end faces, and 2-17 are locking claw assembly accommodating grooves.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the double self-locking pilot spring-rising hydrogen injection valve provided by the invention comprises a left connecting assembly 1 and a right connecting assembly 2, wherein the left connecting assembly 1 is in butt joint with the right connecting assembly 2, so that primary self-locking and secondary self-locking of a joint can be realized, hydrogen leakage is avoided, the safety performance of the whole structure is improved, hydrogenation is performed in a grading manner from a low-pressure chamber to a high-pressure chamber in the hydrogenation process, the structure is more reasonable, and the hydrogen injection valve is safer in the hydrogenation process.
As shown in fig. 2, in the embodiment of the present invention, the left connecting assembly 1 includes a left threaded joint 1-1, a left housing 1-3, a left spring 1-5 and a left valve core 1-7, wherein a right side end of the left housing 1-3 is an open structure, a left side end of the left housing 1-3 is provided with a central through hole, the left valve core 1-7 and the left spring 1-5 are sequentially accommodated in the central through hole of the left housing 1-3 from right to left, the left threaded joint 1-1 is in threaded connection with a left side end of the central through hole, and the left threaded joint 1-1 abuts against the left spring 1-5. The left spring 1-5 is limited between the left threaded joint 1-1 and the left valve core 1-7, and the left valve core 1-7 seals the central through hole of the left shell 1-3 through elasticity.
In the embodiment of the invention, the central through hole on the left shell 1-3 comprises an extension part 1-6 extending rightwards along the axial direction, the extension part 1-6 is of a cylindrical structure, an inner sealing seam allowance 1-9 is arranged on the inner wall of the central through hole positioned inside the extension part 1-6, and a locking groove 1-8 is arranged on the outer surface of the extension part 1-6.
As shown in FIG. 3, in the embodiment of the invention, the left valve core 1-7 comprises a left valve core body 1-7-1 and a left valve core sealing end surface 1-7-3, the left valve core sealing end surface 1-7-3 is arranged at the left end of the left valve core body 1-7-1, and the right end of the left valve core body 1-7-1 is provided with a left valve core central blind hole 1-7-2 along the axis; the left valve core body 1-7-1 is provided with a left valve core annular groove 1-7-4 on the outer circumference of the left end close to the left valve core sealing end face 1-7-3, and a plurality of left valve core vent holes 1-7-5 communicated with the left valve core central blind hole 1-7-2 are arranged in the left valve core annular groove 1-7-4. The left valve core 1-7 is accommodated in the extension part 1-6, and the sealing end surface 1-7-3 of the left valve core is in sealing contact with the inner sealing spigot 1-9 in the extension part 1-6 through the elastic force of the left spring 1-5.
Specifically, the left threaded joint 1-1 and the left housing 1-3 are in threaded connection, and the left threaded joint 1-1 and the left housing 1-3 are sealed through the gasket 1-2 and the first O-shaped ring 1-4; the left spring 1-5 pushes against the left valve core 1-7, so that a sealing pair is formed between the left valve core 1-7 and the left shell 1-3.
As shown in fig. 4, in the embodiment of the present invention, the right connecting assembly 2 includes a front locking element, a right spring i 2-4, a right valve core 2-7, a locking claw assembly, a right housing 2-11, a right spring ii 2-12 and a right connector 2-13, wherein the left side end of the right housing 2-11 is an open structure, the right valve core 2-7 is disposed in the right housing 2-11, the front locking element is inserted into the open at the left side of the right housing 2-11, the right side end of the front locking element is sleeved on the left side end of the right valve core 2-7 and is in sliding fit with the right valve core 2-7, and a low pressure chamber a is formed between the left side end of the right valve core 2-7 and the front locking element; the right connector 2-13 is in threaded connection with the right side end of the right shell 2-11, a high-pressure chamber B is formed between the right connector 2-13 and the right valve core 2-7 in the right shell 2-11, a right spring I2-4 and a right spring II 2-12 are respectively accommodated in the low-pressure chamber A and the high-pressure chamber B, two ends of the right spring I2-4 are respectively abutted with the left side end and the front end locking piece of the right valve core 2-7, and two ends of the right spring II 2-12 are respectively abutted with the right side end of the right valve core 2-7 and the right connector 2-13; the front end locking piece is used for butting and locking with the left connecting assembly 1; an annular groove is reserved between the right valve core 2-7 and the right shell 2-11, the locking claw assembly is arranged in the annular groove, and the locking claw assembly is driven to be closed or opened through the axial movement of the right valve core 2-7, so that the locking claw assembly can hold or release the front end locking piece.
In the embodiment of the invention, the front end locking piece comprises a self-locking piece 2-1, a self-locking steel ball 2-2 and a middle valve core 2-3, wherein the self-locking piece 2-1 is of a cylindrical structure, and the middle valve core 2-3 is accommodated in the self-locking piece 2-1 and is abutted against a right spring I2-4; a plurality of self-locking steel ball channels are arranged in the side wall of the self-locking piece 2-1, and the right side ports of the self-locking steel ball channels are communicated with the low-pressure chamber; the left side port of the self-locking steel ball channel is located on the left side of the middle valve core 2-3, the self-locking steel ball 2-2 is contained in the left side port of the self-locking steel ball channel, the outer surface of the self-locking steel ball 2-2 protrudes out of the inner wall of the self-locking piece 2-1, and the self-locking steel ball 2-2 is used for being matched with a locking groove 1-8 on the extending part 1-6 to achieve locking between the left connecting assembly 1 and the right connecting assembly 2. Specifically, the diameters of the left valve core 1-7, the middle valve core 2-3 and the right valve core 2-7 are sequentially increased.
As shown in FIG. 6, in the embodiment of the invention, the middle valve core 2-3 comprises a middle valve core body 2-3-1 and a middle valve core sealing end face 2-3-3, the middle valve core body 2-3-1 is of a cylindrical structure, the middle valve core sealing end face 2-3-3 is arranged at the right end of the middle valve core body 2-3-1, the left end of the middle valve core body 2-3-1 is provided with a middle valve core central blind hole 2-3-2 along the axis, the outer circumference of the right end of the middle valve core body 2-3-1 close to the middle valve core sealing end face 2-3-3 is provided with at least one middle valve core annular groove 2-3-4, and a plurality of middle valve core vent holes 2-3-5 communicated with the middle valve core central blind hole 2-3-2 are arranged in the middle valve core annular groove 2-3-4.
In the embodiment of the invention, the inner wall of the right end of the self-locking piece 2-1 close to the right valve core 2-7 is provided with a low-pressure cavity sealing end face 2-15, and the middle valve core sealing end face 2-3-3 of the middle valve core 2-3 is in sealing contact with the low-pressure cavity sealing end face 1-15, so that the sealing of the low-pressure cavity A is realized. A sealing pair is formed between the right spring I2-4 auxiliary self-locking piece 2-1 and the middle valve core 2-3.
As shown in fig. 5, in the embodiment of the present invention, the right valve element 2-7 includes a right valve element body 2-7-1 and a right valve element sealing end surface 2-7-3, wherein the right valve element body 2-7-1 is a cylindrical structure, the right valve element sealing end surface 2-7-3 is disposed at the right end of the right valve element body 2-7-1, and the left end of the right valve element body 2-7-1 is provided with a right valve element central blind hole 2-7-2 along the axis; the right valve core body 2-7-1 is provided with a right valve core annular groove 2-7-4 on the outer circumference of the right end close to the right valve core sealing end face 2-7-3, and a plurality of right valve core vent holes 2-7-5 are arranged in the right valve core annular groove 2-7-4.
Specifically, a shaft hole in sliding fit with the right valve core body 2-7-1 is formed in the right shell 2-11, a second O-shaped ring 2-6 and a third O-shaped ring 2-10 are arranged on the outer surface of the right valve core body 2-7-1, and the second O-shaped ring 2-6 plays a role in sealing when the right valve core 2-7 and the self-locking piece 2-1 slide and displace; the third O-shaped ring 2-10 plays a role in sealing when sliding between the right valve core 2-7 and the right shell 2-11; the diameter of the shaft hole is smaller than that of the high-pressure chamber B, a high-pressure chamber sealing end face 2-16 perpendicular to the axis of the shaft hole is arranged at the communication position of the shaft hole and the high-pressure chamber B, and the right valve core sealing end face 2-7-3 is in sealing contact with the high-pressure chamber sealing end face 2-16 to achieve sealing of the high-pressure chamber B. A right spring II 2-12 assists a sealing pair to be formed between the right valve core 2-7 and the right shell 2-11; the inner wall of the left side end of the right shell 2-11 is provided with a locking claw component accommodating groove 2-17. The right joint 2-13 is sealed with the right housing 2-11 by a right gasket 2-14.
As shown in fig. 4, in the embodiment of the present invention, the locking claw assembly includes at least two symmetrically disposed locking claws 2 to 5, the front end of the locking claw 2 to 5 is hook-shaped, and the inner side of the rear end is provided with an inclined plane; a supporting steel ball 2-9 is arranged between the outer side surface of the locking claw 2-5 and the inner wall of the right shell 2-11; the outer surface of the right valve core 2-7 is provided with a rolling steel ball 2-8 which is contacted with the inclined plane at the rear end of the inner side of the locking claw 2-5, and when the right valve core 2-7 moves along the axial direction, the locking claw 2-5 is pushed to swing around the supporting steel ball 2-9 through the rolling steel ball 2-8.
In the embodiment of the invention, the self-locking piece 2-1 is formed by casting or 3D printing, 2 to 6 self-locking steel ball channels are formed inside the self-locking piece, the inner wall of the left side port of each self-locking steel ball channel is finely ground, and the sealing between the self-locking steel ball 2-2 and the inner wall of the left side port of each self-locking steel ball channel is ensured. The rolling steel ball 2-8 can enable the locking claw 2-5 to be opened or closed when the locking claw 2-5 and the right valve core 2-7 do relative displacement; the steel balls 2-9 are supported so that the locking claw 2-5 and the right shell 2-11 can only do rotary motion.
In the embodiment of the invention, when the left connecting component 1 is inserted into the right connecting component 2, the left shell 1-3 and the self-locking component 2-1 are sealed through the O-shaped sealing ring, the middle valve core 2-3 pushes against the left valve core 1-7 to overcome the spring force of the left spring 1-5 until the self-locking steel ball 2-2 is clamped with the locking groove 1-8 on the extending part 1-6. Meanwhile, the extension part 1-6 can push the middle valve core 2-3 to overcome the spring force of the right spring I2-4, so that the middle valve core 2-3 is sealed and opened, gas enters the low-pressure chamber A and enters the self-locking steel ball channel, and the self-locking steel ball 2-2 is locked in the locking groove 1-8 on the extension part 1-6 under the action of air pressure to form first self-locking; when the spring force of the right spring I2-4 and the pressure of gas push the right valve core 2-7 to drive the rolling steel ball 2-8 to overcome the spring force of the right spring II 2-12 and move rightwards together, the rolling steel ball 2-8 pushes the inclined plane at the rear end of the locking claw 2-5 to enable the locking claw 2-5 to swing around the supporting steel ball 2-9, and at the moment, the front end of the locking claw 2-5 is locked with the left shell 1-3 to form second self-locking; and meanwhile, the right valve core 2-7 is opened, gas flows from the low-pressure chamber A into the high-pressure chamber B, and gas can be added at the moment.
In the embodiment of the invention, the high-pressure large port is controlled by the low-pressure small port, so that a pilot structure is formed. Specifically, the medium does not directly act on the right valve core 2-7, acts on the right spring I2-4 firstly, overcomes the elastic force of the spring I2-4, then enters the low-pressure chamber A, then continuously acts on the right valve core 2-7, drives the right valve core 2-7 to move rightwards, and the medium enters the high-pressure chamber B, so that the low-pressure control high pressure is realized. The spring-up principle is as follows: the spring-up type is based on the principle of a safety valve, and when the pressure reaches the critical point of the pressure of a spring, a valve clack can be quickly lifted up to increase the fluid flow. Specifically, when the medium enters the low-pressure chamber A, the medium drives the right valve element 2-7 to move rightwards, and when the pressure of the medium is larger than the critical value of the pretightening force of the right spring II 2-12, the medium can drive the right valve element 2-7 to be quickly lifted, and at the moment, the medium can quickly enter the high-pressure side.
The double self-locking and pilot spring-rising type hydrogen injection valve provided by the invention can realize primary self-locking and secondary self-locking of the joint, avoid hydrogen leakage and improve the safety performance of the whole structure; through the arrangement of the low-pressure chamber and the high-pressure chamber, the hydrogen is firstly added from the low-pressure chamber to the high-pressure chamber in a grading manner in the hydrogenation process to buffer the pressure of the hydrogen, so that impact force on a hydrogen energy vehicle is avoided, and the service life of the hydrogen storage tank is prolonged.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A double self-locking pilot spring-lift type hydrogen injection valve is characterized by comprising a left connecting assembly (1) and a right connecting assembly (2);
the left connecting assembly (1) comprises a left threaded connector (1-1), a left shell (1-3), a left spring (1-5) and a left valve core (1-7), wherein the right side end of the left shell (1-3) is of an open structure, the left side end of the left shell (1-3) is provided with a central through hole, the left valve core (1-7) and the left spring (1-5) are sequentially accommodated in the central through hole of the left shell (1-3) from right to left, the left threaded connector (1-1) is in threaded connection with the left side end of the central through hole, and the left threaded connector (1-1) is abutted to the left spring (1-5);
the right connecting assembly (2) comprises a front end locking piece, a right spring I (2-4), a right valve core (2-7), a locking claw assembly, a right shell (2-11), a right spring II (2-12) and a right connector (2-13), wherein the left end of the right shell (2-11) is of an open structure, the right valve core (2-7) is arranged in the right shell (2-11), the front end locking piece is inserted into the opening in the left side of the right shell (2-11), the right end of the front end locking piece is sleeved on the left end of the right valve core (2-7) and is in sliding fit with the left end of the right valve core, and a low-pressure chamber is formed between the left end of the right valve core (2-7) and the front end locking piece; the right connector (2-13) is in threaded connection with the right side end of the right shell (2-11), a high-pressure chamber is formed between the right connector (2-13) and the right valve core (2-7) in the right shell (2-11), a right spring I (2-4) and a right spring II (2-12) are respectively accommodated in the low-pressure chamber and the high-pressure chamber, two ends of the right spring I (2-4) are respectively abutted with the left side end and the front end locking piece of the right valve core (2-7), and two ends of the right spring II (2-12) are respectively abutted with the right side end of the right valve core (2-7) and the right connector (2-13); the front end locking piece is used for butting and locking with the left connecting component (1);
an annular groove is reserved between the right valve core (2-7) and the right shell (2-11), the locking claw component is arranged in the annular groove, and the locking claw component is driven to close or open by the axial movement of the right valve core (2-7), so that the locking claw component can hold or release the front end locking piece.
2. A dual self-locking, pilot sprung hydrogen injection valve according to claim 1, characterised in that the central through bore comprises an extension (1-6) extending axially to the right, the extension (1-6) being of cylindrical configuration, the outer surface of the extension (1-6) being provided with locking grooves (1-8).
3. The dual self-locking pilot spring-lift type hydrogen injection valve according to claim 2, wherein the left valve core (1-7) comprises a left valve core body (1-7-1) and a left valve core sealing end face (1-7-3), wherein the left valve core sealing end face (1-7-3) is arranged at the left end of the left valve core body (1-7-1), and the right end of the left valve core body (1-7-1) is provided with a left valve core central blind hole (1-7-2) along the axis;
a left valve core annular groove (1-7-4) is arranged on the outer circumference of the left end of the left valve core body (1-7-1) close to the left valve core sealing end surface (1-7-3), and a plurality of left valve core vent holes (1-7-5) communicated with the left valve core central blind hole (1-7-2) are arranged in the left valve core annular groove (1-7-4);
the inner wall of the extension part (1-6) is provided with an inner sealing spigot (1-9); the left valve core (1-7) enables the sealing end surface (1-7-3) of the left valve core to be in sealing contact with the inner sealing spigot (1-9) through the elasticity of the left spring (1-5).
4. The dual self-locking pilot reed-up hydrogen injection valve according to claim 2, wherein the front locking member comprises a self-locking member (2-1), a self-locking steel ball (2-2) and a middle valve core (2-3), wherein the self-locking member (2-1) is of a cylindrical structure, and the middle valve core (2-3) is accommodated in the self-locking member (2-1) and is abutted against the right spring i (2-4); a plurality of self-locking steel ball channels are arranged in the side wall of the self-locking piece (2-1), and the right end port of each self-locking steel ball channel is communicated with the low-pressure chamber; the left side port of the self-locking steel ball channel is located on the left side of the middle valve core (2-3), the self-locking steel ball (2-2) is contained in the left side port of the self-locking steel ball channel, the outer surface of the self-locking steel ball (2-2) protrudes out of the inner wall of the self-locking piece (2-1), and the self-locking steel ball (2-2) is used for being matched with a locking groove (1-8) in the extending part (1-6) to achieve locking between the left connecting assembly (1) and the right connecting assembly (2).
5. The dual self-locking pilot spring-lift hydrogen injection valve according to claim 4, wherein the middle valve core (2-3) comprises a middle valve core body (2-3-1) and a middle valve core sealing end face (2-3-3), wherein the middle valve core body (2-3-1) is of a cylindrical structure, the middle valve core sealing end face (2-3-3) is arranged at the right end of the middle valve core body (2-3-1), the left end of the middle valve core body (2-3-1) is provided with a middle valve core central blind hole (2-3-2) along the axis, the outer circumference of the right end of the middle valve core body (2-3-1) close to the middle valve core sealing end face (2-3-3) is provided with at least one middle valve core annular groove (2-3-4), and a plurality of middle valve core central blind holes (2-3-4) are arranged in the middle valve core annular groove (2-3-4) -2) a central valve core vent (2-3-5) in communication;
the diameters of the left valve core (1-7), the middle valve core (2-3) and the right valve core (2-7) are increased progressively in sequence.
6. The dual self-locking pilot spring-lift hydrogen injection valve according to claim 5, wherein the self-locking piece (2-1) is provided with a low-pressure chamber sealing end face (2-15) near the inner wall of the right end of the right valve core (2-7), and the middle valve core sealing end face (2-3-3) of the middle valve core (2-3) is in sealing contact with the low-pressure chamber sealing end face (2-15) to realize the sealing of the low-pressure chamber.
7. The dual self-locking pilot spring-lift type hydrogen injection valve according to claim 1, wherein the right valve core (2-7) comprises a right valve core body (2-7-1) and a right valve core sealing end surface (2-7-3), wherein the right valve core body (2-7-1) is of a cylindrical structure, the right valve core sealing end surface (2-7-3) is arranged at the right end of the right valve core body (2-7-1), and the left end of the right valve core body (2-7-1) is provided with a right valve core central blind hole (2-7-2) along the axis; the outer circumference of the right end of the right valve core body (2-7-1) close to the right valve core sealing end face (2-7-3) is provided with a right valve core annular groove (2-7-4), and a plurality of right valve core vent holes (2-7-5) are arranged in the right valve core annular groove (2-7-4).
8. The dual self-locking pilot spring-lift type hydrogen injection valve according to claim 7, wherein a shaft hole in sliding fit with the right valve core body (2-7-1) is arranged in the right housing (2-11), the diameter of the shaft hole is smaller than that of the high-pressure chamber, a high-pressure chamber sealing end face (2-16) perpendicular to the axis of the shaft hole is arranged at the communication position of the shaft hole and the high-pressure chamber, and the right valve core sealing end face (2-7-3) is in sealing contact with the high-pressure chamber sealing end face (2-16) to realize sealing of the high-pressure chamber.
9. The dual self-locking, pilot sprung hydrogen injection valve according to claim 8, characterized in that the inner wall of the left end of the right housing (2-11) is provided with a locking pawl assembly receiving groove (2-17).
10. The dual self-locking pilot spring-up hydrogen injection valve according to claim 1, wherein the locking claw assembly comprises at least two symmetrically arranged locking claws (2-5), the front ends of the locking claws (2-5) are hook-shaped, and the inner sides of the rear ends are provided with inclined planes; a supporting steel ball (2-9) is arranged between the outer side surface of the locking claw (2-5) and the inner wall of the right shell (2-11); the outer surface of the right valve core (2-7) is provided with a rolling steel ball (2-8) which is in contact with the inclined plane at the rear end of the inner side of the locking claw (2-5), and when the right valve core (2-7) moves along the axial direction, the rolling steel ball (2-8) pushes the locking claw (2-5) to swing around the supporting steel ball (2-9).
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| CN202210881346.1A CN115111452B (en) | 2022-07-26 | 2022-07-26 | Dual self-locking pilot spring-lifting type hydrogen injection valve |
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| CN202210881346.1A CN115111452B (en) | 2022-07-26 | 2022-07-26 | Dual self-locking pilot spring-lifting type hydrogen injection valve |
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| CN115111452B CN115111452B (en) | 2022-11-04 |
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Cited By (1)
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| CN116696879A (en) * | 2023-07-24 | 2023-09-05 | 宁波市北仑艾唯特机械制造有限公司 | Hydraulic valve block assembly |
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| CN115111452B (en) | 2022-11-04 |
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