CN104315211B - The safety valve in variable larynx footpath - Google Patents
The safety valve in variable larynx footpath Download PDFInfo
- Publication number
- CN104315211B CN104315211B CN201410523170.8A CN201410523170A CN104315211B CN 104315211 B CN104315211 B CN 104315211B CN 201410523170 A CN201410523170 A CN 201410523170A CN 104315211 B CN104315211 B CN 104315211B
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- auxiliary
- main
- valve
- valve disc
- fixedly connected
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
Abstract
The invention discloses a kind of safety valve in variable larynx footpath, including：Shell, main spring mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc；The shell lower end is socketed on valve nozzle；The main spring mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc are arranged on the enclosure；The connector top half is enclosure portion, and the latter half is open portion, is fixedly connected at the top of the connector with the main spring mechanism, bottom is fixedly connected with the main valve disc；The auxiliary spring mechanism bottom is fixedly connected with the auxiliary valve disc；A kind of safety valve in variable larynx footpath provided in an embodiment of the present invention, by adding a set of auxiliary spring mechanism and auxiliary valve disc in safety valve, and the release pressure of main valve disc mechanism and auxiliary valve disc mechanism is arranged to small one and large one, so as to form two different discharge-channels of metered flow, both the security of safety valve can be ensured, trembling and the problem of chatter for valve disc is turn avoid.
Description
Technical field
The present invention relates to valve production technical field, more particularly to a kind of safety valve in variable larynx footpath.
Background technology
According to API526 standards, per one-level, specified discharge capacity is different in safety valve larynx footpath, particularly large scale larynx footpath, adjacent level
Discharge capacity differ greatly.But the principle in selection safety valve larynx footpath is that to choose larynx footpath value be than calculating larynx footpath value greatly that
Level, many times calculates larynx footpath only than this level greatly a bit.For example：It is 3.61in to calculate larynx footpath2, larynx footpath M is 3.60in2, larynx footpath N
For 4.34in2.Larynx footpath N can only be selected in such cases.In this case, in discharge process, excess process medium row is had
Put, while safety valve chatter or can tremble, cause the unstability of safety valve, and chatter or tremble repeatedly and can influence safety valve
Characteristic, shortens safety valve service life.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of stability height, the safety in the variable larynx footpath of service life length
Valve.
In order to solve the above technical problems, the invention provides a kind of safety valve in variable larynx footpath, including:Shell, main spring
Mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc；
The shell lower end is socketed on valve nozzle；
The main spring mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc are arranged on the enclosure；
The main spring mechanism is by the main spring with being fixedly connected at the top of the connector；
The connector top half is enclosure portion, and the latter half is open portion, at the top of the connector with it is described
Main spring mechanism is fixedly connected, and bottom is fixedly connected with the main valve disc；
The auxiliary spring mechanism bottom is fixedly connected with the auxiliary valve disc；
In normal conditions, the auxiliary valve disc mechanism is tightly combined with main valve disc, is covered on the top of valve nozzle, is prevented
Processing medium is leaked, and when safety valve inlet pressure is equal to the release pressure of the auxiliary valve disc, the auxiliary spring mechanism is by crowded
Pressure zone moves the auxiliary valve disc mechanism lifts, and the auxiliary valve disc, which is opened, carries out processing medium discharge, when safety valve inlet pressure etc.
When the main valve disc release pressure, the main spring mechanism is squeezed the drive main valve disc lifting, and the main valve disc is beaten
Drive the discharge of row processing medium into.
Further, the shell includes：
Bonnet, valve bonnet and valve body；
The bonnet lower end is fixedly connected with the valve bonnet upper end；
The valve body upper end is fixedly connected with the valve bonnet lower end, and lower end is socketed on the valve nozzle, the valve bonnet side
Provided with relieving device.
Further, the auxiliary spring mechanism includes：
Auxiliary spring, auxiliary axle and auxiliary latch plate；
The auxiliary spring is arranged in the enclosure portion of the connector, and upper end is fixed with the connector top inner wall to be connected
Connect, lower end is fixedly connected with the auxiliary latch plate；
The auxiliary latch plate lower end is fixedly connected with the auxiliary axle；
The auxiliary axle bottom is fixedly connected with the auxiliary valve disc；
In normal conditions, the auxiliary valve disc is tightly combined with main valve disc, is covered on the top of valve nozzle, prevents technique
Dielectric leakage, when safety valve inlet pressure is equal to the release pressure of the auxiliary valve disc, the auxiliary spring is squeezed drive institute
Auxiliary valve disc lifting is stated, the auxiliary valve disc, which is opened, carries out processing medium discharge.
Further, the main spring mechanism also includes：
Main shaft, main spring, main spring set screw and main spring plate；
The main spring set screw, main spring and main spring sleeve-board are connected on the main shaft；
The main spring lower end is fixedly connected with connector top, and upper end is fixedly connected with main spring plate；
The main spring set screw is arranged on the main spring plate upper end, and outside is spirally connected with the valve bonnet, for passing through
Adjust the length of main spring to change the setting pressure of main spring, so as to change the release pressure that main valve disc is opened；
When safety valve inlet pressure is equal to the release pressure of the main valve disc, it is described that the main spring is squeezed drive
Main valve disc is lifted, and the main valve disc, which is opened, carries out processing medium discharge.
Further, the safety valve in described variable larynx footpath, in addition to：
Main locator, the main locator is arranged on the connector periphery, is fixed by the valve bonnet and valve body,
Ensure that the connector keeps vertical in up and down motion.
Further, the safety valve in described variable larynx footpath, in addition to：
Auxiliary locator, the auxiliary locator is arranged on the auxiliary axle periphery, and with being fixedly connected inside the connector, protects
Demonstrate,prove the auxiliary axle and keep vertical in up and down motion.
Further, the safety valve in described variable larynx footpath, in addition to：
Main locating piece, the main locating piece is arranged on the connector, and positioned at the main locator lower end, the master
Locating piece is used to enter the hoisting depth of the main valve disc with the main locators during the main valve disc is lifted
Row positioning.
Further, the safety valve in described variable larynx footpath, in addition to：
Auxiliary locating piece, the auxiliary locating piece is arranged on the auxiliary axle, and positioned at the auxiliary locator lower end, it is described auxiliary fixed
Position block is used to carry out the hoisting depth of the auxiliary valve disc with the auxiliary locators during the auxiliary valve disc lifting
Positioning.
Further, the safety valve in described variable larynx footpath, in addition to：
Regulation ring and regulation ring set screw, the regulation ring are socketed in the valve nozzle periphery, by adjusting the regulation
Ring set screw changes the position of regulation ring, aids in the main valve disc to open.
Further, the auxiliary valve disc is the circular frustum structure stood upside down.
The safety valve in a kind of variable larynx footpath provided in an embodiment of the present invention, by adding a set of auxiliary spring in safety valve
Mechanism and auxiliary valve disc, and the release pressure of main valve disc mechanism and auxiliary valve disc mechanism is arranged to small one and large one, so as to form two
The different discharge-channel of metered flow, can both ensure the security of safety valve, turn avoid trembling for valve disc and asking for chatter
Topic.
Brief description of the drawings
Fig. 1 is a kind of safety valve structure schematic diagram in variable larynx footpath that the embodiment of the present invention 1 is provided；
Fig. 2 is the safety valve in the variable larynx footpath shown in Fig. 1 in P ＜ PSLWhen fundamental diagram；
Fig. 3 is the safety valve in the variable larynx footpath shown in Fig. 1 in PSH≥P≥PSLWhen fundamental diagram；
Fig. 4 is the safety valve in the variable larynx footpath shown in Fig. 1 in P >=PSHWhen fundamental diagram；
Fig. 5 is the structural representation of the safety valve in the variable larynx footpath shown in embodiment 3；
Wherein, 1, bonnet, 2, main shaft, 3, main spring set screw, 4, valve bonnet, 5, main spring plate, 6 main springs, 7, emptying
Hole (is blocked), and 8, connector, 9, auxiliary spring, 10, auxiliary latch plate, 11, auxiliary locator, 12, valve body, 13, main locator, 14, auxiliary
Axle, 15, main locating piece, 16, auxiliary valve disc, 17, main valve disc, 18, regulation ring, 19, regulation ring set screw, 20, valve nozzle, 21, auxiliary
Locating piece；
P is safety valve inlet pressure, PSLFor the release pressure of the auxiliary valve disc of safety valve, PSHFor the take-off of safety valve main valve disc
Pressure, PSL＜ PSH。
Embodiment
The present invention is further described below by several specific embodiments.
Embodiment 1：
Referring to Fig. 1, the safety valve in variable larynx footpath provided in an embodiment of the present invention, including：Shell, main spring mechanism, auxiliary bullet
Spring mechanism, connector 8, main valve disc 17, auxiliary valve disc 16, regulation ring 18 and regulation ring set screw 19, shell lower end is socketed in valve
On mouth 20；Main spring mechanism, auxiliary spring mechanism, connector 8, main valve disc 17 and auxiliary valve disc 16 are set inside the housing；Connector 8
Top half is enclosure portion, and the latter half is open portion, and the top of connector 8 is fixedly connected with main spring mechanism, bottom and
Main valve disc 17 is fixedly connected；In order to strengthen the sealing between main valve disc 17 and auxiliary valve disc 16, reduce auxiliary valve disc 16 as far as possible
Take-off time, auxiliary valve disc 16 set in the circular frustum structure stood upside down, and auxiliary spring mechanism bottom is fixedly connected with auxiliary valve disc 16；
Regulation ring 18 is socketed in the periphery of valve nozzle 20, changes the position of regulation ring 18 by adjusting regulation ring set screw 19, aids in main valve
Disk 17 is opened.
In normal conditions, auxiliary valve disc 16 is tightly combined with main valve disc 17, covers the top in valve nozzle 20, prevents work
Skill dielectric leakage, when safety valve inlet pressure is equal to the release pressure of auxiliary valve disc 16, it is auxiliary that auxiliary spring mechanism is squeezed drive
Valve disc 16 is lifted, and auxiliary valve disc 16, which is opened, carries out processing medium discharge, when safety valve inlet pressure is equal to the take-off pressure of main valve disc 17
During power, main spring mechanism is squeezed drive main valve disc 17 and lifted, and main valve disc 17, which is opened, carries out processing medium discharge.
Wherein, shell includes：Bonnet 1, valve bonnet 4 and valve body 12；The lower end of bonnet 1 is fixedly connected with the upper end of valve bonnet 4；Valve body 12
Upper end is fixedly connected with the lower end of valve bonnet 4, and lower end is socketed on valve nozzle 20, and the side of valve bonnet 4 is provided with relieving device 7, when safety valve maintenance
When, first the stop valve of safety valve upstream and downstream is closed, relieving device 7 is opened, is vented the processing medium in safety valve, then will safety
Valve is removed from pipe-line system.
Auxiliary spring mechanism includes：Auxiliary spring 9, auxiliary axle 14 and auxiliary latch plate 10；Auxiliary spring 9 is arranged on the closing of connector 8
In part, upper end is fixedly connected with the top inner wall of connector 8, and lower end is fixedly connected with auxiliary latch plate 10；The auxiliary lower end of latch plate 10
It is fixedly connected with auxiliary axle 14；The auxiliary bottom of axle 14 is fixedly connected with auxiliary valve disc 16；In normal conditions, auxiliary valve disc 16 and main valve disc 17
Tightly combine, cover the top in valve nozzle 20, prevent processing medium from leaking, when safety valve inlet pressure is equal to auxiliary valve disc 16
Release pressure when, auxiliary spring 9 is squeezed the auxiliary valve disc 16 of drive and lifted, and auxiliary valve disc 16 is opened progress processing medium discharge.
Main spring mechanism also includes：Main shaft 2, main spring 6, main spring set screw 3 and main spring plate 5；Main spring is adjusted
Screw 3, main spring 6 and main spring plate 5 are socketed on main shaft 2；The lower end of main spring 6 is fixedly connected with the top of connector 8, upper end with
Main spring plate 5 is fixedly connected；Main spring set screw 3 is arranged on the upper end of main spring plate 5, and outside is spirally connected with valve bonnet 4, for passing through
Adjust the length of main spring 6 to change the setting pressure of main spring 6, so as to change the release pressure that main valve disc 17 is opened；When
When safety valve inlet pressure is equal to the release pressure of main valve disc 17, main spring 6 is squeezed drive main valve disc 17 and lifted, main valve disc
17 open progress processing medium discharge.
A kind of operation principle of variable larynx footpath safety valve provided in an embodiment of the present invention is as follows：
Can be respectively that main valve disc 17 and auxiliary valve disc 16 are set because main spring 6 and auxiliary spring 9 are the spring that two thicknesses are different
Put different release pressures, and the release pressure P of auxiliary valve disc 16SLLess than the release pressure P of main valve disc 17SH。
P is safety valve inlet pressure, PSLFor the auxiliary release pressure of valve disc 16 of safety valve, PSHFor the take-off of safety valve main valve disc 17
Pressure, PSL＜ PSH。
Referring to Fig. 2, when safety valve inlet pressure P is less than PSLWhen, auxiliary spring 9 passes to the power of auxiliary valve disc 16 by auxiliary axle 14
FfMore than the power that P acts on the auxiliary bottom surface of valve disc 16, main spring 6 passes to the power F of main valve disc 17 by connector 8zMore than P effects
Power in the bottom surface of main valve disc 17, this makes safety valve main ＆ auxiliary disk be closely integrated into an entirety, closely covered on valve nozzle 20, prevents
Leakage and discharge.
Referring to Fig. 3, when safety valve inlet pressure P is more than or equal to PSLAnd less than PSHWhen, because auxiliary spring 9 passes through auxiliary axle 14
Pass to the power F of auxiliary valve disc 16fLess than the power that P acts on the auxiliary bottom surface of valve disc 16, auxiliary spring 9 is compressed, and auxiliary valve disc 16 is carried therewith
Rise, auxiliary valve disc 16 separates with main valve disc 17, and form annulus there is provided discharge-channel；Main spring 6 passes through connector 8 simultaneously
Pass to the power F of main valve disc 17zMore than the power that P acts on the bottom surface of main valve disc 17, therefore auxiliary valve disc 16 starts to discharge, and main valve
Disk 17 is still closed.The auxiliary hoisting depth of valve disc 16 determines by the P power and the elastic force of auxiliary spring 9 for acting on the auxiliary bottom surface of valve disc 16,
Auxiliary valve disc 16 rises to highest when both are equal, now discharge-channel aperture of the amount of releasing of safety valve on the bottom surface of main valve disc 17
Determine.
Referring to Fig. 4, after auxiliary valve disc 16 is opened, and P continues to rise, and reaches PSHWhen, i.e. P >=PSHWhen, main spring 6 passes through
Connector 8 passes to the power F of main valve disc 17zLess than the power that P acts on the bottom surface of main valve disc 17, main spring 6 is compressed, main valve disc 17
Open therewith.The hoisting depth of main valve disc 17 is determined by the P power and the elastic force of main spring 6 for acting on the bottom surface of main valve disc 17, when two
Main valve disc 17 rises to highest when person is equal, and now the amount of releasing of safety valve is determined by the discharge capacity of safety valve valve nozzle 20.
When P declines, when reaching PSHWhen be first shut off main valve disc 17；When P continues to decline, P is reachedSLWhen, close auxiliary valve disc
16, this process is the inverse process that safety valve is opened.
Embodiment 2：
The present embodiment and the difference of embodiment 1 are that the safety valve in the variable larynx footpath that the present embodiment is provided also includes：
Main locator 13 and main locating piece 15, main locator 13 are arranged on the periphery of connector 8, are fixed by valve bonnet 4 and valve body 12,
Ensure that connector 8 keeps vertical when moving up and down.Main locating piece 15 is arranged on connector 8, and under main locator 13
End, main locating piece 15 is used to coordinate to enter the hoisting depth of main valve disc 17 with main locator 13 during main valve disc 17 is lifted
Row positioning.After auxiliary valve disc 16 is opened, and P continues to rise, and reaches PSHWhen, i.e. P >=PSHWhen, main spring 6 is passed by connector 8
Pass the power F of main valve disc 17zLess than the power that P acts on the bottom surface of main valve disc 17, main spring 6 is compressed, and main valve disc 17 is opened therewith.
The maximum lifting height of main valve disc 17 determined by the relative position of main locator 13 and main locating piece 15, and now safety valve is released
Amount is determined by the discharge capacity of safety valve valve nozzle 20.It is completely the same with embodiment 1 elsewhere.
Embodiment 3：
As shown in figure 5, the present embodiment and the difference of embodiment 2 are, the peace in the variable larynx footpath that the present embodiment is provided
Full valve also includes：Auxiliary locator 11 and auxiliary locating piece 21, auxiliary locator 11 are arranged on the periphery of auxiliary axle 14, and with inside connector 8
It is fixedly connected, it is ensured that auxiliary axle 14 keeps vertical when moving up and down.Auxiliary locating piece 21 is arranged on auxiliary axle 14, and positioned at auxiliary positioning
The lower end of device 11, auxiliary locating piece 21 is used to coordinate the lifting to auxiliary valve disc 16 with auxiliary locator 11 during auxiliary valve disc 16 is lifted
Highly positioned.When auxiliary valve disc 16 is opened, the maximum lifting height of auxiliary valve disc 16 is by auxiliary locator 11 and auxiliary locating piece 21
Relative position determine, now discharge-channel aperture of the amount of releasing of safety valve on the bottom surface of main valve disc 17 is determined.Elsewhere
It is completely the same with embodiment 2.
A kind of safety valve in variable larynx footpath provided in an embodiment of the present invention, adds a set of auxiliary spring mechanism in safety valve
With auxiliary valve disc 16, so as to form two different release pressures, while form the different discharge-channel of two metered flows,
Have the beneficial effect that：
1st, in relief valve design calculating process, often there are multiple operating modes of releasing, the amount of releasing difference is also very big, this
In the case of, make if only that will cause valve disc chatter using a discharge-channel designed based on maximum discharging amount or tremble
The situation that safety valve is damaged.The present invention is realized by designing the combination of 16 two kinds of modes of releasing of main valve disc 17 and auxiliary valve disc can be with
The appropriate main and auxiliary discharge area selected needed for two kinds of controlled load case design safety valves：, all operating modes are divided into two by the amount of releasing
Group, by using the structure design of main valve disc 17, with designing main fluid-expelling pathway based on maximum discharging amount；By using auxiliary valve disc 16
Structure design, with auxiliary discharge-channel is designed based on another selected amount of releasing, so as to avoid above-mentioned valve disc chatter or tremble
The situation for damaging safety valve, strengthens the stability of safety valve, has ensured the characteristic of safety valve.
2nd, release under operating mode only existing one kind, the large scale larynx footpath that main valve disc 17 is controlled selects design by API standard, auxiliary
The small size larynx footpath that valve disc 16 is controlled is designed according to actual needs, so can both be ensured security, be turn avoid and tremble and chatter
The problem of.
It should be noted last that, above embodiment is merely illustrative of the technical solution of the present invention and unrestricted,
Although the present invention is described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (7)
1. a kind of safety valve in variable larynx footpath, it is characterised in that including：
Shell, main spring mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc；
The shell lower end is socketed on valve nozzle；
The main spring mechanism, auxiliary spring mechanism, connector, main valve disc and auxiliary valve disc are arranged on the enclosure；
The shell includes：
Bonnet, valve bonnet and valve body；
The bonnet lower end is fixedly connected with the valve bonnet upper end；
The valve body upper end is fixedly connected with the valve bonnet lower end, and lower end is socketed on the valve nozzle, and the valve bonnet side is provided with
Relieving device；
The main spring mechanism also includes：
Main shaft, main spring, main spring set screw and main spring plate；
The main spring set screw, main spring and main spring sleeve-board are connected on the main shaft；
The main spring lower end is fixedly connected with connector top, and upper end is fixedly connected with main spring plate；
The main spring set screw is arranged on the main spring plate upper end, and outside is spirally connected with the valve bonnet, for passing through regulation
The length of main spring changes the setting pressure of main spring, so as to change the release pressure that main valve disc is opened；
The auxiliary spring mechanism includes：
Auxiliary spring, auxiliary axle and auxiliary latch plate；
The auxiliary spring is arranged in the enclosure portion of the connector, and upper end is fixedly connected with the connector top inner wall,
Lower end is fixedly connected with the auxiliary latch plate；
The auxiliary latch plate lower end is fixedly connected with the auxiliary axle；
The auxiliary axle bottom is fixedly connected with the auxiliary valve disc；
The connector top half is enclosure portion, and the latter half is open portion, with the main bullet at the top of the connector
Spring mechanism is fixedly connected, and bottom is fixedly connected with the main valve disc；
The auxiliary spring mechanism bottom is fixedly connected with the auxiliary valve disc；
In normal conditions, the auxiliary valve disc is tightly combined with main valve disc, is covered on the top of valve nozzle, prevents processing medium
Leakage, when safety valve inlet pressure is equal to the release pressure of the auxiliary valve disc, the auxiliary spring mechanism is squeezed drive institute
Auxiliary valve disc lifting is stated, the auxiliary valve disc, which is opened, carries out processing medium discharge, when safety valve inlet pressure is equal to the main valve disc
During release pressure, the main spring mechanism is squeezed the drive main valve disc lifting, and the main valve disc, which is opened, carries out technique Jie
Matter is discharged.
2. the safety valve in variable larynx footpath as claimed in claim 1, it is characterised in that also include：
Main locator, the main locator is arranged on the connector periphery, is fixed by the valve bonnet and valve body, it is ensured that
The connector keeps vertical when moving up and down.
3. the safety valve in variable larynx footpath as claimed in claim 1, it is characterised in that also include：
Auxiliary locator, the auxiliary locator is arranged on the auxiliary axle periphery, and with being fixedly connected inside the connector, it is ensured that institute
State auxiliary axle and keep vertical in up and down motion.
4. the safety valve in variable larynx footpath as claimed in claim 1, it is characterised in that also include：
Main locating piece, the main locating piece is arranged on the connector, and positioned at the main locator lower end, the main positioning
Block is used to determine the hoisting depth of the main valve disc with the main locators during the main valve disc is lifted
Position.
5. the safety valve in variable larynx footpath as claimed in claim 3, it is characterised in that also include：
Auxiliary locating piece, the auxiliary locating piece is arranged on the auxiliary axle, and positioned at the auxiliary locator lower end, the auxiliary locating piece
For being positioned during the auxiliary valve disc lifting with the auxiliary locators to the hoisting depth of the auxiliary valve disc.
6. the safety valve in the variable larynx footpath as described in claim any one of 1-5, it is characterised in that also include：
Regulation ring and regulation ring set screw, the regulation ring are socketed in the valve nozzle periphery, are adjusted by adjusting the regulation ring
The position that screw changes regulation ring is saved, aids in the main valve disc to open.
7. the safety valve in variable larynx footpath as claimed in claim 6, it is characterised in that：
The auxiliary valve disc is the circular frustum structure stood upside down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410523170.8A CN104315211B (en) | 2014-09-30 | 2014-09-30 | The safety valve in variable larynx footpath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410523170.8A CN104315211B (en) | 2014-09-30 | 2014-09-30 | The safety valve in variable larynx footpath |
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| Publication Number | Publication Date |
|---|---|
| CN104315211A CN104315211A (en) | 2015-01-28 |
| CN104315211B true CN104315211B (en) | 2017-09-01 |
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ID=52370488
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410523170.8A Active CN104315211B (en) | 2014-09-30 | 2014-09-30 | The safety valve in variable larynx footpath |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518845A (en) * | 2011-12-15 | 2012-06-27 | 赵全 | Triple-spring safety valve |
| CN203500596U (en) * | 2013-07-02 | 2014-03-26 | 乐山长仪阀门制造有限公司 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT986479B (en) * | 1973-06-18 | 1975-01-30 | Marocco A | IMPROVEMENTS IN DIFFERENTIAL SOLENOID VALVES FOR FLUID CONTROL |
| CN202927178U (en) * | 2012-11-10 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Pilot-operated double-valve core split-range control valve |
| CN203516886U (en) * | 2013-10-14 | 2014-04-02 | 苏州道森阀门有限公司 | Pilot-operated balance valve element of adjusting-type valve |
| CN204253961U (en) * | 2014-09-30 | 2015-04-08 | 中国石油天然气股份有限公司 | The safety valve in variable larynx footpath |
-
2014
- 2014-09-30 CN CN201410523170.8A patent/CN104315211B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518845A (en) * | 2011-12-15 | 2012-06-27 | 赵全 | Triple-spring safety valve |
| CN203500596U (en) * | 2013-07-02 | 2014-03-26 | 乐山长仪阀门制造有限公司 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
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| CN104315211A (en) | 2015-01-28 |
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