CN105889530A - Over-pressure cutoff valve - Google Patents
Over-pressure cutoff valve Download PDFInfo
- Publication number
- CN105889530A CN105889530A CN201610514398.XA CN201610514398A CN105889530A CN 105889530 A CN105889530 A CN 105889530A CN 201610514398 A CN201610514398 A CN 201610514398A CN 105889530 A CN105889530 A CN 105889530A
- Authority
- CN
- China
- Prior art keywords
- spool
- valve
- lock pin
- spring
- valve body
- 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
Links
Classifications
-
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses an over-pressure cutoff valve. The over-pressure cutoff valve comprises a valve opening and a valve core, wherein the valve opening is communicated with a fluid passage; the valve core is in sliding fit with a valve body, and is connected with a locking mechanism; a first spring is arranged between the valve core and the valve body; when the locking mechanism is in an unlocking state, the valve core is driven by the elastic force of the first spring to move, and the fluid passage of the valve opening is blocked; the locking mechanism comprises a lock pin, the lock pin is transversely inserted into an annular groove of the valve core to lock an opening state of the valve body corresponding to the valve core, and a second spring and a diaphragm are respectively arranged at the two sides of the lock pin, and are used for the lock pin to respectively lock and unlock the movement driving; a diaphragm cavity is formed between the diaphragm and the valve body, and is communicated with the fluid passage. The over-pressure cutoff valve has the beneficial effects that the cutoff valve is in a pure mechanical structure, the spark is avoided, and the cutoff valve is especially suitable for urban gas supply pipelines; the structure is simple, the cutoff is reliable, and the safety in use is realized.
Description
Technical field
Patent of the present invention relates to a kind of stop valve, a kind of pressure limit stop valve for fuel gas shutoff.
Background technology
Stop valve is a kind of valve for being blocked by fluid in control section in fluid circuit, chemical industry,
In fuel gas transmission and city gas supply commonly used.The startup of stop valve controls generally to use Electromagnetic Control,
Cut off type of drive and include driven by power, hydraulic pressure or air pressure driving etc..At inflammable and explosive environment or pumped (conveying) medium
During for flammable explosive gas, the electrical equipment startup of Electromagnetic Control easily produces spark, there is disaster hidden-trouble.
For this reason, it may be necessary to improve further.
Summary of the invention
The purpose of the present invention is aiming at the deficiencies in the prior art, it is provided that a kind of by the fluid pressure of pumped (conveying) medium
As starting the driving power controlled, and cut-out power is provided by the spring of energy-storage travelling wave tube, purely mechanic to be formed
The stop valve of structure, can effectively eliminate and produce link because driven by power mode exists electronic component spark, be suitable for
Carry in flammable explosive gas, particularly city gas supply pipeline.Its simple in construction, cut off reliable, make
By safety.
For achieving the above object, the present invention adopts the following technical scheme that.
A kind of pressure limit stop valve, including for connecting the valve port of fluid passage and being slidably fitted in valve body
Spool, spool connect have lockable mechanism, be provided with the first spring between spool and valve body, with at lockable mechanism
When being in released state, the elastic force of the first spring drives spool to move, and forms the fluid passage of valve port
Closure；Lockable mechanism includes lock pin, and lock pin is opened by spool being formed valve in the horizontal cannelure being inserted in spool
Opening the locking of state, lock pin is respectively provided on two sides with the second spring and barrier film, and the second spring and barrier film are respectively used to
The locking of lock pin and the mobile driving of unblock；Diaphragm cavity, this diaphragm cavity and institute is formed between described barrier film and valve body
State fluid passage to connect.
Use the present invention of preceding solution, have lockable mechanism, between spool and valve body owing to spool connects
Being provided with the first spring, when lockable mechanism is in released state, spool is driven by the elastic force of the first spring
Mobile, thus the fluid passage of valve port is formed closure.It is constant, not by fluid pressure that it cuts off closedown power
Size affects, and simple in construction, cuts off reliable.Wherein, lockable mechanism passes through the horizontal cannelure being inserted in spool
In lock pin form the locking that spool is moved, lock pin respectively by the second spring and barrier film drive spool locking and
Unlock；Forming diaphragm cavity between barrier film and valve body, this diaphragm cavity is connected with described fluid passage.Therefore, exist
When diaphragm cavity fluid pressure is more than setting value, barrier film, by fluid forces displacement, overcomes the second spring
Elastic force makes the cannelure of lock pin abjection spool, reaches spool and is unlocked and closes the fluid passage of valve port
Purpose.To realize control to target pipeline section upper fluid pressure, it is particularly well-suited to chemical industry pipeline, poisonous
Harmful fluids pipeline, and the cutting-off controlling management of the pressure limit of inflammable and explosive gas pipeline.It cuts off
Controlling according to pipe fluid pressure, reliability is high, is not required to, by other instrument and meters, more need not electric power
Drive and control, eliminate electrical equipment and start the fire or the potential safety hazard of blast producing spark and bring.
Preferably, described lock pin is circular；The cannelure side of described spool is formed with the cone shaft shoulder, lock
The abutting state that pin is tangent with the described cone shaft shoulder forms the locking to spool.To facilitate manufacture, reduce
Manufacturing cost, and in time at lock pin or/and in the case of spool rotates, locking control all can be realized reliably
System.
Preferably, described the cone taper seat of the shaft shoulder and the angle α of valve core axis between 75 °～85 ° it
Between.Frustoconical bevel angle parameter directly affects the reliability of locking and unlocks response speed, and the biggest locking of this angle is more
Reliably, angle is the least, unlocks corresponding speed the fastest, therefore, rational frustoconical bevel angle need according to lock pin and
Spool material, hardness, the condition such as rough surface group carries out Theoretical Calculation and lot of experiment validation obtains.Therefore,
Select rational frustoconical bevel angle, both can ensure that acquisition good reliability and quick, quick unblock performance.
Preferably, described lock pin traverses in the middle part of tubular element, and the middle part of tubular element is provided with for through institute
Perforation is traversed in the bar shaped stating spool, and lock pin is connected with described spool by the part being positioned at tubular element pipe；Pipe
The mating holes that shape component is provided with by the pipe outer wall of lock pin side and described valve body forms sliding connection, should
Being formed with interior step on the endoporus of section pipeline section, the endoporus of this section of pipeline section installs described second spring, and interior step
Abutting with one end of the second spring, the other end of the second spring is connected on plug screw, and plug screw is screwed on described valve
On body；Tubular element is positioned at the far-end of lock pin opposite side and is connected with barrier film.Tubular element and spool form cross
The arrangement intersected, its topology layout is compact, and stop valve overall volume is little, and installation takes up room little, suitable
For being laid in the narrow and small equipment of installation site or facility.
Preferably, the dish type end liner of rigidity it is fixedly connected with in the middle part of described barrier film.By the major part formation of barrier film
Rigid structure, it is simple to the deformation of flexible portion is reliably converted into displacement, improves and controls sensitivity.
Preferably, described spool is formed closure by front end to the fluid passage of described valve port, and spool tail end exposes
Outside described valve body, spool tail end is formed with free-hand handgrip.To cut off at pipeline fluid and to fix a breakdown,
Or after fluid pressure drop is low, free-hand pull spool until by automatic locking.
The invention has the beneficial effects as follows, simple in construction, cut off reliable, use safety, be particularly well-suited to city
The cutting-off controlling that gas pipe pressure transfinites.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings, but the most therefore limits the present invention to described
Scope of embodiments among.
Seeing Fig. 1, a kind of pressure limit stop valve, including for connecting fluid channel inlet end and the port of export
Valve port 1 and the spool 3 being slidably fitted on valve body 2, the fluid passage of valve port 1 is formed by spool 3 by front end
Closure, it is outside that spool 3 tail end exposes valve body 2, and spool 3 tail end is formed with the free-hand gripping knot of cylinder capitiform
Structure 3b, the free-hand handgrip 3b outer end of spool 3 is provided with the protective cover 11 being screwed on valve body 2；Spool 3
Connect and have lockable mechanism, be provided with the first spring 4 between spool 3 and valve body 2, to be in unblock at lockable mechanism
During state, the elastic force of the first spring 4 drives spool 3 to move, and the fluid passage of valve port 1 is formed envelope
Stifled；Lockable mechanism includes lock pin 5, and lock pin 5 is by forming valve to spool 3 in the horizontal cannelure being inserted in spool 3
The locking of door opening, lock pin 5 is respectively provided on two sides with the second spring 6 and barrier film 7, the second spring 6 and every
Film 7 is respectively used to the locking of lock pin 5 and unlocks mobile driving；Diaphragm cavity is formed between barrier film 7 and valve body 2,
Being fixedly connected with the dish type end liner 12 of rigidity in the middle part of barrier film 7, this diaphragm cavity is by Media Interface Connector 2a and described fluid
The port of export of passage is connected, and after arranging pressure regulator with the exit at valve port 1 passage, through-flow body leads to the port of export
Fluid pressure be the pressure after pressure regulation, when the pressure after this pressure regulation exceedes setting value, stop valve passes through valve
The valve port 1 Channel front end port of core 3 closure, thus cut off the fluid shutoff of outlet flow channels end.
Wherein, lock pin 5 is circular；The cannelure side of spool 3 is formed with cone shaft shoulder 3a, lock pin 5
The abutting state being tangent with cone shaft shoulder 3a forms the locking to spool 3；The circular cone of cone shaft shoulder 3a
The angle α of face and spool 3 axis is between 75 °～85 °.
Lock pin 5 traverses in the middle part of tubular element 8, and the middle part of tubular element 8 is provided with for through spool 3
Perforation is traversed in bar shaped, and lock pin 5 is connected with described spool 3 by the part being positioned at tubular element 8 pipe；Tubulose
The mating holes that component 8 is provided with by the pipe outer wall of lock pin 5 side and described valve body 2 forms sliding connection,
Being formed with interior step on the endoporus of this section of pipeline section, the endoporus of this section of pipeline section installs described second spring 6, and interior platform
Rank abut with one end of the second spring 6, and the other end of the second spring 6 is connected on plug screw 9, plug screw 9 spiral shell
Being combined on described valve body 2, plug screw 9 is outside is provided with the protection cap 10 being screwed on valve body 2, and valve body 2 passes through
Same screw screws togather with plug screw 9 and protection cap 10；Tubular element 8 be positioned at the far-end of lock pin 5 opposite side with every
Film 7 connects.
In the present embodiment, the cone taper seat of shaft shoulder 3a and the angle α of spool 3 axis between 78 °～
It is optimal between 82 °.
The preferred embodiment of the present invention described in detail above.Should be appreciated that the ordinary skill of this area
Personnel just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all
Technical staff passes through logical analysis the most on the basis of existing technology, pushes away in the art
Reason or the limited available technical scheme of experiment, all should be at the protection model being defined in the patent claims
In enclosing.
Claims (6)
1. a pressure limit stop valve, including the valve port (1) for connecting fluid passage be slidably matched
Spool (3) on valve body (2), spool (3) connects lockable mechanism, spool (3) and valve body (2)
Between be provided with the first spring (4), with when lockable mechanism is in released state, the elasticity of the first spring (4)
Power drives spool (3) mobile, and the fluid passage of valve port (1) is formed closure；It is characterized in that, institute
State lockable mechanism and include lock pin (5), lock pin (5) by the horizontal cannelure being inserted in spool (3) to spool
(3) forming the locking of valve opening state, lock pin (5) is respectively provided on two sides with the second spring (6) and barrier film
(7), the second spring (6) and barrier film (7) are respectively used to the locking of lock pin (5) and unlock mobile driving；
Forming diaphragm cavity between described barrier film (7) and valve body (2), this diaphragm cavity is connected with described fluid passage.
Pressure limit stop valve the most according to claim 1, it is characterised in that described lock pin (5)
For circle；The cannelure side of described spool (3) is formed with the cone shaft shoulder (3a), lock pin (5) and institute
State the cone shaft shoulder (3a) and form the locking to spool (3) in tangent abutting state.
Pressure limit stop valve the most according to claim 1, it is characterised in that the described cone shaft shoulder
(3a) taper seat and the angle α of spool (3) axis are between 75 °～85 °.
Pressure limit stop valve the most according to claim 1, it is characterised in that described lock pin (5)
Traversing at tubular element (8) middle part, the middle part of tubular element (8) is provided with for through described spool (3)
Bar shaped traverse perforation, lock pin (5) is by part and described spool (3) being positioned at tubular element (8) pipe
Connect；Tubular element (8) passes through the pipe outer wall of lock pin (5) side and coordinating that described valve body (2) is provided with
Hole forms sliding connection, and the endoporus of this section of pipeline section is formed interior step, the endoporus installing of this section of pipeline section
Described second spring (6), and one end abutting of interior step and the second spring (6), the second spring (6)
The other end is connected on plug screw (9), and plug screw (9) is screwed on described valve body (2)；Tubular element (8)
The far-end being positioned at lock pin (5) opposite side is connected with barrier film (7).
5. according to the pressure limit stop valve described in any one in Claims 1 to 4, it is characterised in that
Described barrier film (7) middle part is fixedly connected with the dish type end liner (10) of rigidity.
6. according to the pressure limit stop valve described in any one in Claims 1 to 4, it is characterised in that
Described spool (3) is formed closure by front end to the fluid passage of described valve port (1), and spool (3) tail end reveals
Going out described valve body (2) outside, spool (3) tail end is formed with free-hand handgrip (3b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610514398.XA CN105889530A (en) | 2016-06-30 | 2016-06-30 | Over-pressure cutoff valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610514398.XA CN105889530A (en) | 2016-06-30 | 2016-06-30 | Over-pressure cutoff valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105889530A true CN105889530A (en) | 2016-08-24 |
Family
ID=56718665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610514398.XA Pending CN105889530A (en) | 2016-06-30 | 2016-06-30 | Over-pressure cutoff valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105889530A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19952610A1 (en) * | 1998-11-24 | 2000-05-25 | Fiorentini Minireg S P A | Stop valve for controlling low and high pressure fluid flow has cam which shifts with diaphragm based on variation in pressure of fluid |
| CN2432411Y (en) * | 2000-06-23 | 2001-05-30 | 重庆市山城燃气设备有限公司 | Gas pressure regulator |
| CN203757114U (en) * | 2012-10-01 | 2014-08-06 | 艾默生过程管理调节技术公司 | Fluid regulation device |
| CN204083404U (en) * | 2014-09-05 | 2015-01-07 | 罗达莱克斯阀门(上海)有限公司 | Fluid pressure regulator valve |
-
2016
- 2016-06-30 CN CN201610514398.XA patent/CN105889530A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19952610A1 (en) * | 1998-11-24 | 2000-05-25 | Fiorentini Minireg S P A | Stop valve for controlling low and high pressure fluid flow has cam which shifts with diaphragm based on variation in pressure of fluid |
| CN2432411Y (en) * | 2000-06-23 | 2001-05-30 | 重庆市山城燃气设备有限公司 | Gas pressure regulator |
| CN203757114U (en) * | 2012-10-01 | 2014-08-06 | 艾默生过程管理调节技术公司 | Fluid regulation device |
| CN204083404U (en) * | 2014-09-05 | 2015-01-07 | 罗达莱克斯阀门(上海)有限公司 | Fluid pressure regulator valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160824 |
|
| RJ01 | Rejection of invention patent application after publication |