CN110360359A - A kind of high pressure hydrogen excess flow valve - Google Patents
A kind of high pressure hydrogen excess flow valve Download PDFInfo
- Publication number
- CN110360359A CN110360359A CN201910733007.7A CN201910733007A CN110360359A CN 110360359 A CN110360359 A CN 110360359A CN 201910733007 A CN201910733007 A CN 201910733007A CN 110360359 A CN110360359 A CN 110360359A
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- China
- Prior art keywords
- sealing
- valve body
- flow
- restriction
- elastic component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 40
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 150
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
-
- 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
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a kind of high pressure hydrogen excess flow valves, comprising: valve body, the valve body are closed hollow structure, and the valve body lower end opening is connected to medium source；Sealing, the sealing lower ending opening are connected to the valve body upper end opening, the sealing lower end outside wall and the valve body upper end inner sidewall gluing, sealing；Restriction, restriction upper end lateral wall and the sealing lower inner side wall fit closely；Elastic component, the elastic component lower end surface are located in the restriction, the elastic component upper surface and sealing fitting.The present invention realizes sealing by the way that the sealing and valve body fitting is arranged, rate-of flow is monitored by the way that the elastic component is arranged, sharp reaction is made to the change of rate-of flow, the seal degree of decrement the control limiting section and the sealing of the elastic component, to control the flow of medium, current limliting is carried out to medium.
Description
Technical field
The present invention relates to hydric safe fields, are related specifically to a kind of high pressure hydrogen excess flow valve.
Background technique
Excess flow valve is a kind of protective device, in normal operating conditions, when in pipeline by the flow in prescribed limit, valve
It is opened when door, medium can pass through excess flow valve；When the accidents such as occur rupturing in pipeline or auxiliary device, excess flow valve is just automatic
Current limliting is closed, being largely lost for medium is prevented.
Hydrogen is a kind of inflammable and explosive gas, is easily exploded when leaking.And the pressure of high pressure hydrogen and air
Power difference is excessive, easily generation Release and dispersion phenomenon, and therefore, requirement of the high pressure hydrogen to leakproofness is extremely stringent.In the prior art
Excess flow valve poor sealing performance, be unable to satisfy requirement of the high pressure hydrogen to leakproofness；When accident occurs, excess flow valve is closed, but high
Press the impact of hydrogen strong, extremely difficult to the current limliting of high pressure hydrogen, existing excess flow valve can not carry out high pressure hydrogen effective
Current limliting.Therefore, the excess flow valve for inventing the high pressure hydrogen that a kind of leakproofness is strong, current limitation effect is good is skill urgently to be solved instantly
Art problem.
Summary of the invention
One of the object of the invention is to provide a kind of high pressure hydrogen excess flow valve, to solve excess flow valve leakproofness in the prior art
Technical problem low, current limitation effect is poor.
The second object of the present invention is to provide a kind of overcurrent current-limiting method of high-pressure and overflowing valve, to realize the sealing of excess flow valve
Property is strong, current limitation effect is good.
One of in order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of high pressure hydrogen excess flow valve, comprising: valve body, the valve body are closed hollow structure, the valve body middle part
With consistent reach through hole, the through-hole lower end is less than upper end, and the valve body lower end opening is connected to medium source；Sealing, it is described
Sealing lower ending opening is connected to the valve body upper end opening, the sealing lower end outside wall and valve body upper end inner sidewall
Gluing, sealing, the sealing inside are used for flow of media, are used for outside the sealing and the valve body cooperates sealing；Current limliting
Portion, restriction upper end lateral wall and the sealing lower inner side wall fit closely, and the restriction is for limiting medium
Flow；Elastic component, the elastic component lower end surface are located in the restriction, the elastic component upper surface and sealing patch
It closes, the elastic component is used to carry out rate-of flow automatic monitoring in real time, to control the restriction and the sealing is matched
It closes and current limliting is carried out to medium.In the present embodiment, tight with the sealing lower end outside by being arranged on the inside of the valve body upper end
Closely connected conjunction forms sealing surface, prevents medium from leaking to outside out of excess flow valve body；By the way that the restriction is arranged in the valve body
It is interior, the elastic component is set and is located in the restriction, the elastic component upper surface and sealing fitting are set, made
The elastic component is monitored rate-of flow, sharp reaction is made to the change of rate-of flow, to drive the current limliting
Portion and the sealing cooperating carry out current limliting to medium.Deformation occurs for the elastic component stress, and the pressure of the elastic component
Contracting amount will control the seal degree of limiting section and the sealing, to control the flow of medium.Using the technology of the present embodiment
Scheme not only realizes the sealing to excess flow valve, also achieves effective current limliting to medium.
Further, in embodiments of the present invention, the valve body lower end bends inwards to form the first recess portion, the restriction
Above first recess portion.The diameter of first recess portion be less than the valve body in the middle part of diameter and the restriction it is straight
The position of the restriction is limited in the middle part of the valve body and the valve body lower end overthe openings by diameter.
Further, in embodiments of the present invention, the sealing includes: seal, and the seal is hollow structure,
The seal lower end outside wall and the valve body upper end inner sidewall gluing, sealing；First convex block, first convex block is described
Lateral wall outward bending is formed in the middle part of seal, first convex block lower end surface and valve body upper surface fitting.Pass through setting
The position restriction of the seal is bonded by first convex block lower end surface and valve body upper surface fitting with the valve body
Position, avoid the gluing, sealing face of the sealing and the valve body occur relative displacement, cause leakproofness low.
Further, in embodiments of the present invention, the sealing further include: retaining ring, the retaining ring are located at the sealing
At body and the valve body gluing, sealing；Sealing ring, the sealing ring are located at below the retaining ring.The sealing ring and the retaining ring
High with the fitness of the sealing, the valve body, the sealing ring is for sealing between the sealing and the valve body
Gap, the retaining ring are used to enhance the fitness of the sealing and the valve body, make the whole Du Genggao of excess flow valve, meanwhile,
The retaining ring can prevent the axial movement of sealing ring, sealing, valve body, axial limiting, to improve the leakproofness of excess flow valve.
Further, in embodiments of the present invention, the sealing ring and the retaining ring are suitable hydrogen material.In excess flow valve
Medium be hydrogen matter, Hydrogen Brittleness Phenomena easily occurs for the long-term work excess flow valve that gets off, by be arranged suitable hydrogen material the sealing ring and
The retaining ring is remarkably improved the service life of excess flow valve.
Further, in embodiments of the present invention, the restriction includes: guide pad, and the guide pad is by intrados
Fitting on the inside of the side wall surrounded with extrados and anchor ring, the extrados and the sealing；Limiting block, the limiting block and institute
The connection of guide pad lower end is stated, the limited block is located at below the sealing and the elastic component.The guide pad is located at described
In sealing, it is bonded by the way that the guide pad and the sealing is arranged, limits the position of the guide pad, thus described in limiting
The position of restriction moves the restriction along the valve body centerline direction, makes the elastic component along the valve body
Heart line direction is compressed or is rebounded, and avoids the elastic component by card resistance when compression or rebound, leads to the restriction and described close
The fitting in envelope portion is not close, poor so as to cause the current limitation effect of excess flow valve.
Further, in embodiments of the present invention, the guide pad lower end is equipped with the first flow-conveying groove, first overcurrent
Slot is used to control the flow of medium.First flow-conveying groove is located in the restriction, and the elastic component and the restriction connect
It connects, the rapid reaction by the elastic component to rate-of flow, so that first flow-conveying groove and the sealing be made to be overlapped
Area generates corresponding change in time, and can be changed in real time according to the variation of rate-of flow, makes excess flow valve to rate-of flow
Real-time current limliting.First flow-conveying groove can be arranged to difference according to the difference of excess flow valve bore and different rate-of flow standards
Bore and different quantity.
Further, in embodiments of the present invention, the limiting block diameter is greater than the guide pad diameter.The guiding
Block position and sealing fitting, the guide pad can move in the sealing, big by the way that the limiting block diameter is arranged
In the guide pad diameter, fit closely the limiting block and the sealing side wall, to make the limiting block and described
Gap between sealing is adjustable, to realize the current limliting to rate-of flow.
Further, in embodiments of the present invention, the limiting block and guide pad junction outer ring are equipped with
Guide surface, the guide surface is low inside and high outside to be obliquely installed.By the way that the guide surface is arranged, increase the limiting block and the sealing
The fitness of subordinate end face, and the bonding position of the limiting block and the sealing is limited, guarantee the limiting block specified
Direction movement, the elastic component are compressed and are rebounded in assigned direction, to ensure that the current limitation effect of excess flow valve.
Further, in embodiments of the present invention, the second flow-conveying groove, second overcurrent are equipped with below the limiting block
Slot increases flow area, to increase valve flow, second flow-conveying groove is used for flow of media, makes medium from the valve
Body lower inlet flows into the middle part of the valve body.The area and quantity of second flow-conveying groove can demands according to excess flow valve to flow
Setting.
Further, in embodiments of the present invention, the valve body mid diameter is greater than the maximum gauge of the restriction.By
It is greater than the restriction diameter in the valve body mid diameter and is greater than the sealing inner sidewall diameter, to guarantees normal discharge
Under state, it is full of medium in the sealing, guarantees medium maximum stream flow, avoids the limiting block and the guide pad from reducing and is situated between
Mass flow amount.
Further, in embodiments of the present invention, the valve body lateral wall is equipped with mark circle, and the mark circle is for knowing
Other excess flow valve.
Further, in embodiments of the present invention, the sealing upper end is equipped with cutting ferrule group, the connection side of the cutting ferrule group
Formula is replaceable.
In order to achieve the above objectives two, the invention adopts the following technical scheme:
A kind of overcurrent current-limiting method of high pressure hydrogen excess flow valve, includes the following steps:
Overcurrent: piping flow is normal, and the limited block is equal to the medium power of medium by the elastic force of the elastic component, described
Limiting block is located in the middle part of the valve body, and the valve body mid diameter is greater than the limiting block diameter, and medium is from the valve body lower end
Opening enters, and by second flow-conveying groove, flows into the middle part of the valve body, by first flow-conveying groove, flows into the elasticity
Inside body and the seal, flowed out from the sealing upper end opening；
Current limliting: piping flow sharp increase is not normal, and the medium power that the limiting block is subject to is greater than the elastic force of the elastic component, described
Limiting block compress the elastic component to the sealing under the action of medium power where direction move to the guide surface and
The seal lower end surface fitting, first flow-conveying groove are located in the seal, and only a small amount of medium can be led by described
Enter first flow-conveying groove to face and the seal joint place to flow at the sealing upper end opening；
Reset: piping flow restores normal, and the medium power that the limiting block is subject to is decreased to less than the bullet of the elastic component
Power, the limiting block move under the action of elastic force to the direction far from the sealing, the guide surface and the seal
Lower end surface separation, first flow-conveying groove are moved in the middle part of the valve body out of described seal, and medium passes through first mistake
Chute flows at sealing upper end opening.
The utility model has the advantages that
The present invention makes the seal and institute by the effect fitted closely on the outside of the seal and on the inside of the valve body
The whole degree stated between valve body is very high, then the sealing ring and the retaining ring by the way that suitable hydrogen material is arranged, makes the sealing
Sealing is realized between body and the valve body, and enhances the fitness between the seal and the valve body, is axially defined
The position of each structure prevents each structure to be axially moved, to ensure that the leakproofness of excess flow valve.
The present invention is greater than the restriction most by the diameter in the middle part of setting second flow-conveying groove, the valve body
Major diameter makes in the middle part of the valve body full of medium；By the way that first flow-conveying groove is arranged, the intracorporal medium of the valve is made to pass through institute
Restriction, sealing outflow are stated, realizes the overcurrent of excess flow valve；Make the elastic component to medium by the way that the elastic component is arranged
Flow is monitored, and changes the overlapping area of first flow-conveying groove and the seal by the elastic component, to control
Medium is by the flow of first flow-conveying groove, to realize the current limliting of excess flow valve.Due to medium flow at different times
It is different, corresponding medium power is also different, leads to the deformation quantity and first flow-conveying groove and described close of the elastic component
The overlapping area for sealing body is different, to realize the real-time automatic current limiting to rate-of flow
The present invention makes the restriction along the valve body centerline direction by the way that the guide pad and the guide surface is arranged
It is mobile, force the guide surface and the seal lower end surface to be fitted close, avoid the restriction because of velocity of medium, flow not
Uniformly deviate the valve body center line, causes the elastic component on the direction for deviateing the valve body center line by compression and anti-
Bullet, so that card resistance, which occurs, for the elastic component to reset, meanwhile, lead to first mistake of guide pad lower end different location
The area that chute and the seal are overlapped is different, and the current limitation effect for eventually leading to excess flow valve is poor.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is a kind of schematic perspective view of high pressure hydrogen excess flow valve of the present invention.
Fig. 2 is a kind of overcurrent cross-sectional view of high pressure hydrogen excess flow valve of the present invention.
Fig. 3 is a kind of current limliting cross-sectional view of high pressure hydrogen excess flow valve of the present invention.
In attached drawing
1, valve body 2, sealing 3, restriction
4, sealing ring 5, retaining ring 6, elastic component
7, cutting ferrule 1, cutting ferrule 29, cutting ferrule three
10, mark circle the 1.1, first recess portion 2.1, seal
2.2, the first convex block 3.1, guide pad 3.2, limiting block
3.3, the first flow-conveying groove 3.4, the second flow-conveying groove 3.5, guide surface
3.6, groove
Specific embodiment
The purpose of the present invention, technical solution are clearly and completely described and advantage is more clearly understood in order to make, with
The embodiment of the present invention is further elaborated in lower combination attached drawing.It should be appreciated that specific embodiment described herein is
A part of the embodiment of the present invention is only used to explain the embodiment of the present invention instead of all the embodiments, is not used to limit this
Inventive embodiments, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", " in " "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "inner", "outside", "top", "bottom", " side ", "vertical", "horizontal" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.This
Outside, term " one ", " first ", " second ", " third ", " the 4th ", " the 5th ", " the 6th " are used for description purposes only, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
For concise and explanation purpose, the principle of embodiment is described by referring mainly to example.In the following description,
Many details are suggested to provide a thorough understanding of embodiments.It will however be evident that.For ordinary skill
Personnel, these embodiments can be not limited to these details in practice.In some instances, it does not describe in detail known
Method and structure, to avoid unnecessarily making these embodiments become difficult to understand.In addition, all embodiments can be combined with each other
It uses.
As shown in Figure 1 and Figure 2, a kind of high pressure hydrogen excess flow valve, comprising: valve body 1, valve body 1 are closed hollow structure,
There is consistent reach through hole, through-hole lower end is less than upper end, and 1 lower ending opening of valve body is connected to medium source in the middle part of valve body 1；Sealing 2, it is close
2 lower ending opening of envelope portion is connected to 1 upper end opening of valve body, 1 upper end inner sidewall gluing, sealing of 2 lower end outside wall of sealing and valve body,
It is used for flow of media inside sealing 2, is sealed outside sealing 2 for cooperating with valve body 1；Restriction 3, outside 3 upper end of restriction
Side wall and 2 lower inner side wall of sealing fit closely, and restriction 3 is used to limit the flow of medium；Elastic component 6,6 lower end of elastic component
Face is located in restriction 3, and 6 upper surface of elastic component and sealing 2 are bonded, and elastic component 6 is used to be monitored rate-of flow, thus
It controls restriction 3 and the cooperation of sealing 2 carries out current limliting to medium.In the present embodiment, by the inside of setting 1 upper end of valve body and close
2 lower end outside of envelope portion fits closely to form sealing surface, prevents medium from 1 internal leakage of overcurrent valve body to outside；By the way that current limliting is arranged
In in valve body 1, setting elastic component 6 is located in restriction 3 in portion 3, and 6 upper surface of elastic component is arranged and sealing 2 is bonded, makes elastic component
6 pairs of rate-of flows are monitored, and sharp reaction are made to the change of rate-of flow, so that restriction 3 and sealing 2 be driven to match
Work is closed, current limliting is carried out to medium.Deformation occurs for 6 stress of elastic component, and the decrement of elastic component 6 will control limiting section and sealing
The seal degree in portion 2, to control the flow of medium.Using the technical solution of the present embodiment, not only realize to excess flow valve
Sealing, also achieves effective current limliting to medium.
As shown in Figure 1 and Figure 2, valve body 1, sealing 2 are the hollow structure of both ends open, valve body 1, sealing 2, current limliting
Portion 3, elastic component 4 center line point-blank, sealing 2 be " in " character form structure, 2 lower ending opening of sealing and valve body
The connection of 1 upper end opening, is convenient for flow of media；Restriction 3 is located in valve body 1 and sealing 2, the only upper end opening of restriction 3, elasticity
4 lower end of part is limited by restriction 3, and 4 upper end of elastic component is limited by sealing 2, compress elastic component 4 can only in centerline direction
Or rebound, it drives limiting section 3 to move, realizes the overcurrent and current limliting of excess flow valve.
As shown in Figure 1 and Figure 2,1 lower end of valve body bends inwards to form the first recess portion 1.1, and restriction 3 is located at the first recess portion 1.1
Top.The diameter of first recess portion 1.1 is less than the diameter at 1 middle part of valve body and the diameter of restriction 3, and the position of restriction 3 is limited
Above 1 middle part of valve body and 1 lower ending opening of valve body.
As shown in Figure 1 and Figure 2, sealing 2 includes: seal 2.1, and seal 2.1 is hollow structure, 2.1 lower end of seal
1 upper end inner sidewall gluing, sealing of lateral wall and valve body；First convex block 2.2, the first convex block 2.2 are 2.1 middle part lateral wall of seal
Outward bending is formed, 2.2 lower end surface of the first convex block and the fitting of 1 upper surface of valve body.Pass through setting 2.2 lower end surface of the first convex block and valve
1 upper surface of body fitting, make to form linear sealing between seal 2.1 and valve body 1, at the same by the position restriction of seal 2.1 with
The position that valve body 1 is bonded avoids the gluing, sealing face of sealing 2 and valve body 1 that relative displacement occurs, causes leakproofness low.
As shown in Figure 1 and Figure 2, sealing 2 further include: retaining ring 5, retaining ring 5 are located at 1 gluing, sealing of seal 2.1 and valve body
Place；Sealing ring 4, sealing ring 4 are located at 5 lower section of retaining ring.The fitness of sealing ring 4 and retaining ring 5 and sealing 2, valve body 1 is high, close
Seal 4 is used to seal the gap between sealing 2 and valve body 1, and retaining ring 5 is used to enhance the fitness of sealing 2 and valve body 1, made
The whole Du Genggao of valve is flowed, meanwhile, retaining ring 5 can prevent the axial movement of sealing ring 4, sealing 2, valve body 1, axial limiting, from
And improve the leakproofness of excess flow valve.
As shown in Figure 1 and Figure 2, sealing ring 4 and retaining ring 5 are suitable hydrogen material.Medium in excess flow valve is hydrogen matter, permanent worker
Make excess flow valve and Hydrogen Brittleness Phenomena easily occurs, by the way that the sealing ring 4 and retaining ring 5 of suitable hydrogen material is arranged, is remarkably improved excess flow valve
Service life.
As shown in Figure 1 and Figure 2, restriction 3 includes: guide pad 3.1, and guide pad 3.1 is by intrados and extrados and anchor ring
It is bonded on the inside of the side wall surrounded, extrados and sealing 2；Limiting block 3.2, limiting block 3.2 are connected with 3.1 lower end of guide pad, limit
Position block is located at 6 lower section of sealing 2 and elastic component.Guide pad 3.1 is located in sealing 2, passes through setting guide pad 3.1 and sealing
2 fittings, limit the position of guide pad 3.1, to limit the position of restriction 3, move restriction 3 along 1 centerline direction of valve body
It is dynamic, so that elastic component 6 is being compressed or is being rebounded along 1 centerline direction of valve body, avoids elastic component 6 by card resistance when compression or rebound, lead
Cause the fitting of restriction 3 and sealing 2 not close, it is poor so as to cause the current limitation effect of excess flow valve.
As shown in Figure 1 and Figure 2,3.1 lower end of guide pad is equipped with the first flow-conveying groove 3.3, and the first flow-conveying groove 3.3 is situated between for controlling
The flow of matter.First flow-conveying groove 3.3 is located in restriction 3, and elastic component 6 and restriction 3 connect, by elastic component 6 to medium flow field
Amount is swift in response, so that the area for being overlapped the first flow-conveying groove 3.3 and sealing 2 generates corresponding change, and energy in time
It is enough to be changed in real time according to the variation of rate-of flow, make excess flow valve to the real-time current limliting of rate-of flow.According to the difference of excess flow valve bore
The first flow-conveying groove 3.3 can be arranged to different bores and different quantity with different rate-of flow standards.
As shown in Figure 1 and Figure 2,3.2 diameter of limiting block is greater than 3.1 diameter of guide pad.Guide pad 3.1 and sealing 2 paste
It closes, guide pad 3.1 can move in sealing 2, be greater than 3.1 diameter of guide pad by setting 3.2 diameter of limiting block, make limiting block
3.2 and 2 side wall of sealing fit closely, to keep the gap between limiting block 3.2 and sealing 2 adjustable, to realize to Jie
The current limliting of mass flow amount.
As shown in Figure 1 and Figure 2, limiting block 3.2 and 3.1 junction outer ring of guide pad are equipped with guide surface 3.5, in guide surface 3.5
High outer low dip setting.By the way that guide surface 3.5 is arranged, increase the fitness of limiting block 3.2 and 2 lower end surface of sealing, and limit
The bonding position of limiting block 3.2 and sealing 2 guarantees limiting block 3.2 in assigned direction movement, elastic component 6 in assigned direction quilt
Compression and rebound, to ensure that the current limitation effect of excess flow valve.
As shown in Figure 1 and Figure 2, the second flow-conveying groove 3.4 is equipped with below limiting block 3.2, the second flow-conveying groove 3.4 increases runner
Area, to increase valve flow, the second flow-conveying groove 3.4 is used for flow of media, and medium is made to flow into valve from 1 lower inlet of valve body
1 middle part of body.The area and quantity of second flow-conveying groove can according to excess flow valve to flow demand setting.
As shown in Figure 1 and Figure 2,1 mid diameter of valve body is greater than the maximum gauge of restriction 3.Since 1 mid diameter of valve body is big
It is greater than 2 inner sidewall diameter of sealing in 3 diameter of restriction, to guarantee under normal discharge state, medium is full of in sealing 2,
Guarantee medium maximum stream flow, limiting block 3.2 and guide pad 3.1 is avoided to reduce rate-of flow.
As shown in Figure 1 and Figure 2,1 lateral wall of valve body is equipped with mark circle 10, identifies the excess flow valve for identification of circle 10.
As shown in Figure 1 and Figure 2,2 upper end of sealing is equipped with cutting ferrule group, and cutting ferrule group includes cutting ferrule 1, cutting ferrule 28, cutting ferrule three
9, the connection type of cutting ferrule group is replaceable.
Sealing 2 and restriction 3 are metal material, the guide pad 3.1 and sealing when excess flow valve works, in restriction 3
Along 1 centerline direction of valve body relative displacement is occurring for the seal 2.1 in portion 2 under the action of medium power and elastic force, guiding
Block 3.1 and seal 2.1 have abrasion, but since sealing 2 and restriction 3 are metal material, wear intensity between the two
It significantly reduces, sealing effect is preferable.Furthermore 2.1 lower end surface of seal and guide surface 3.5 are bonded or separate under force,
Medium is big to the impact of 2.1 lower end surface of seal and guide surface 3.5 when current limliting, causes 2.1 lower end of seal and guide surface 3.5
The damage of binding face, by setting metal material for sealing 2 and restriction 3, so that 2.1 lower end surface of seal and guide surface
3.5 impact resistance, invulnerability significantly improve, and avoid damage to binding face, so that postpone restriction 3 and sealing 2 uses the longevity
Life, avoids frequently with changing sealing 2 and restriction 3, to reduce cost.
A kind of overcurrent current-limiting method of high pressure hydrogen excess flow valve, includes the following steps:
Overcurrent: as shown in Fig. 2, piping flow is normal, limited block is equal to the medium power of medium by the elastic force of elastic component 6,
Limiting block 3.2 is located at the middle part of valve body 1, and 1 mid diameter of valve body is greater than 3.2 diameter of limiting block, medium from 1 lower ending opening of valve body into
Enter, by the second flow-conveying groove 3.4, flows into 1 middle part of valve body and flowed into elastomer and seal 2.1 by the first flow-conveying groove 3.3
Portion is flowed out from 2 upper end opening of sealing；
Current limliting: not normal, bullet of the medium power that limiting block 3.2 is subject to greater than elastic component 6 as shown in figure 3, piping flow increases severely
Power, the compression elastic piece 6 under the action of medium power of limiting block 3.2 to the direction where sealing 2 move to guide surface 3.5 and close
The fitting of 2.1 lower end surface of body is sealed, the first flow-conveying groove 3.3 is located in seal 2.1, and only a small amount of medium can pass through 3.5 He of guide surface
2.1 joint place of seal enters the first flow-conveying groove 3.3 and flow at 2 upper end opening of sealing；
Reset: piping flow restores normal, and the medium power that limiting block 3.2 is subject to is decreased to less than the elastic force of elastic component 6, limit
It flows block 3.2 to move under the action of elastic force to the direction far from sealing 2, guide surface 3.5 and the separation of 2.1 lower end surface of seal,
First flow-conveying groove 3.3 is moved to 1 middle part of valve body out of seal 2.1, and medium is flowed on sealing 2 by the first flow-conveying groove 3.3
At end opening.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the range of specific embodiment, to the common skill of the art
For art personnel, as long as long as various change the attached claims limit and determine spirit and scope of the invention in, one
The innovation and creation using present inventive concept are cut in the column of protection.
Claims (10)
1. a kind of high pressure hydrogen excess flow valve, comprising:
Valve body, the valve body are closed hollow structure, and the valve body lower end opening is connected to medium source；
Sealing, the sealing lower ending opening are connected to the valve body upper end opening, the sealing lower end outside wall and institute
State valve body upper end inner sidewall gluing, sealing；
Restriction, restriction upper end lateral wall and the sealing lower inner side wall fit closely, and the restriction is used for
Limit rate-of flow；
Elastic component, the elastic component lower end surface are located in the restriction, the elastic component upper surface and sealing fitting,
The elastic component is used to carry out rate-of flow automatic monitoring in real time.
2. a kind of high pressure hydrogen excess flow valve according to claim 1, wherein the valve body lower end bends inwards to form
One recess portion, the restriction are located above first recess portion.
3. a kind of high pressure hydrogen excess flow valve according to claim 1, wherein the sealing includes:
Seal, the seal are hollow structure, the seal lower end outside wall and the fitting of valve body upper end inner sidewall
Sealing；
First convex block, first convex block are that lateral wall outward bending is formed in the middle part of the seal, first convex block lower end
Face and valve body upper surface fitting.
4. a kind of high pressure hydrogen excess flow valve according to claim 1, wherein the sealing includes:
Retaining ring, the retaining ring are located at the seal and the valve body gluing, sealing；
Sealing ring, the sealing ring are located at below the retaining ring.
5. a kind of high pressure hydrogen excess flow valve according to claim 4, wherein the sealing ring and the retaining ring are suitable
Hydrogen material.
6. a kind of high pressure hydrogen excess flow valve according to claim 1, wherein the restriction includes:
Guide pad, the guide pad are the side wall surrounded by intrados and extrados and anchor ring, the extrados and the sealing
Fitting on the inside of portion；
Limiting block, the limiting block are connected with the guide pad lower end, and the limited block is located at the sealing and the elasticity
Below part.
7. a kind of high pressure hydrogen excess flow valve according to claim 6, wherein the guide pad lower end is equipped with the first overcurrent
Slot.
8. a kind of high pressure hydrogen excess flow valve according to claim 6, wherein the limiting block diameter is greater than the guiding
Block diameter.
9. a kind of high pressure hydrogen excess flow valve according to claim 6, wherein the limiting block and the guide pad
Junction outer ring is equipped with guide surface, and the guide surface is low inside and high outside to be obliquely installed.
10. a kind of high pressure hydrogen excess flow valve according to claim 6, wherein be equipped with the second mistake below the limiting block
Chute, second flow-conveying groove are used for flow of media.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910733007.7A CN110360359A (en) | 2019-08-09 | 2019-08-09 | A kind of high pressure hydrogen excess flow valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733007.7A CN110360359A (en) | 2019-08-09 | 2019-08-09 | A kind of high pressure hydrogen excess flow valve |
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| CN110360359A true CN110360359A (en) | 2019-10-22 |
Family
ID=68223529
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| CN201910733007.7A Pending CN110360359A (en) | 2019-08-09 | 2019-08-09 | A kind of high pressure hydrogen excess flow valve |
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| CN101625043A (en) * | 2009-08-13 | 2010-01-13 | 凯迈（洛阳）气源有限公司 | High-pressure reducing valve |
| CN102797884A (en) * | 2011-05-25 | 2012-11-28 | 伟特(厦门)淋浴设备有限公司 | Water-saving valve |
| CN103591355A (en) * | 2013-12-02 | 2014-02-19 | 成都欣国立低温科技有限公司 | Fluid flow limiting valve |
| CN203686288U (en) * | 2014-02-14 | 2014-07-02 | 成都朗瑞深冷科技有限公司 | Flow-limiting valve |
| CN205715870U (en) * | 2016-05-30 | 2016-11-23 | 郑州引领科技有限公司 | Automatically flow-limiting valve is adjusted |
| CN107497168A (en) * | 2017-08-21 | 2017-12-22 | 赛洛克流体设备成都有限公司 | Filter with efficient filter core |
| CN210770480U (en) * | 2019-08-09 | 2020-06-16 | 张家港富瑞阀门有限公司 | Overflow valve for high-pressure hydrogen |
-
2019
- 2019-08-09 CN CN201910733007.7A patent/CN110360359A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625043A (en) * | 2009-08-13 | 2010-01-13 | 凯迈（洛阳）气源有限公司 | High-pressure reducing valve |
| CN102797884A (en) * | 2011-05-25 | 2012-11-28 | 伟特(厦门)淋浴设备有限公司 | Water-saving valve |
| CN103591355A (en) * | 2013-12-02 | 2014-02-19 | 成都欣国立低温科技有限公司 | Fluid flow limiting valve |
| CN203686288U (en) * | 2014-02-14 | 2014-07-02 | 成都朗瑞深冷科技有限公司 | Flow-limiting valve |
| CN205715870U (en) * | 2016-05-30 | 2016-11-23 | 郑州引领科技有限公司 | Automatically flow-limiting valve is adjusted |
| CN107497168A (en) * | 2017-08-21 | 2017-12-22 | 赛洛克流体设备成都有限公司 | Filter with efficient filter core |
| CN210770480U (en) * | 2019-08-09 | 2020-06-16 | 张家港富瑞阀门有限公司 | Overflow valve for high-pressure hydrogen |
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