CN109373027A - A kind of Spring-Loaded Pressure Relief Valve that spring service life is high - Google Patents
A kind of Spring-Loaded Pressure Relief Valve that spring service life is high Download PDFInfo
- Publication number
- CN109373027A CN109373027A CN201811540519.3A CN201811540519A CN109373027A CN 109373027 A CN109373027 A CN 109373027A CN 201811540519 A CN201811540519 A CN 201811540519A CN 109373027 A CN109373027 A CN 109373027A
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- Prior art keywords
- spring
- valve
- pipe
- service life
- valve rod
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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
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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
- F16K17/0413—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 in the form of closure plates
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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
- F16K17/048—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 combined with other safety valves, or with pressure control devices
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The present invention relates to relief valve technical fields, and disclose a kind of Spring-Loaded Pressure Relief Valve that spring service life is high, including valve body, valve pipe and control pipe, the valve pipe is connected to the top of valve body by flange seal, the control pipe screw thread is connected to the top of valve pipe, the valve body and the inside fixing sleeve of valve pipe junction are equipped with sealing ring, are movably installed with valve rod in the middle part of the sealing ring.The high Spring-Loaded Pressure Relief Valve of the spring service life, first valve rod is acted on by repulsion of the upper magnet to the next magnet, when pressure medium inside closed pressure vessel is in pressure threshold as defined in system or so, carry out pressure release and closing, and it is clamped by the notch of axis and valve inside pipe wall, so that spring is in stable compressive state always, it is discharged so as to avoid second spring long lasting for compression, the coefficient of elasticity of second spring is caused to reduce very fast, so that the service life of second spring reduces, to affect the quality of relief valve.
Description
Technical field
The present invention relates to relief valve technical field, specially a kind of Spring-Loaded Pressure Relief Valve that spring service life is high.
Background technique
Relief valve be it is a kind of with pressure be driving automatic decompression device, relief valve includes Spring-Loaded Pressure Relief Valve and water conservancy control
Relief valve processed, wherein Spring-Loaded Pressure Relief Valve is usually used in the safety relief of closed pressure vessel, is situated between inside closed pressure vessel
When matter pressure is more than pressure as defined in system, spring take-off opens valve and general partial pressure is discharged outside boiler or pipeline, uses
To protect closed container.
However, can be led when the pressure medium inside closed pressure vessel is in pressure threshold as defined in system or so
It causes spring take-off for a moment to open valve, closes for a moment, so that spring is in the persistent state of compression release for a long time, so as to cause
The coefficient of elasticity of spring reduces comparatively fast, so that the service life of spring reduces, to affect the quality of relief valve.
Summary of the invention
The present invention provides a kind of Spring-Loaded Pressure Relief Valves that spring service life is high, have the service life raising of spring
Advantage, when solving the pressure medium inside closed pressure vessel and being continuously in pressure threshold or so as defined in system, meeting
Cause spring take-off for a moment to open valve, close for a moment, so that spring is in the persistent state of compression release for a long time, to lead
The coefficient of elasticity of spring is caused to reduce very fast, so that the service life of spring reduces, thus the problem of affecting relief valve quality.
The invention provides the following technical scheme: a kind of Spring-Loaded Pressure Relief Valve that spring service life is high, including valve body, valve pipe
And control pipe, the valve pipe are connected to the top of valve body by flange seal, the control pipe screw thread is connected to the top of valve pipe
The inside fixing sleeve of portion, the valve body and valve pipe junction is equipped with sealing ring, is movably installed with valve rod in the middle part of the sealing ring,
The bottom end of the valve rod is fixedly connected with the spool positioned at valve inner, and the top of the valve rod extends to the inside of control pipe,
Fixing sleeve is equipped with the next magnet positioned at valve tube cavity bottom on the valve rod, and fixing sleeve, which is equipped with, on the valve rod is located at the next magnetic
Limit shaft above body offers through slot in the middle part of the valve rod, is movably installed with above limit shaft on the valve rod
Moving body, the bottom end of the moving body are fixedly connected with upper magnet, and the top of the valve rod is movably installed with positioned at moving body
The second spring of top, the top and bottom of the second spring top movable with the top of moving body and valve tube cavity respectively
Connection, the two sides in the middle part of the moving body offer sliding slot, and the internal activity of two sliding slots is set with movable block, and two
Wirerope is fixedly connected between the movable block, the side of the separate wirerope of two movable blocks is fixedly connected with card
Axis, one end of the axis extend to the outside of moving body, and the side of the movable block is fixedly connected with the first spring, and described
On a steel cord, and the one end of the first spring far from movable block is fixedly connected one spring movable set with the side wall of sliding slot inner cavity,
The side wall of the valve tube cavity offers notch.
Optionally, one end pivot bush unit of the notch and axis.
Optionally, the through slot and wirerope pivot bush unit, and the bottom of through slot inner cavity is close to the bottom of wirerope, it is described
The top of through slot inner cavity is not contacted with the top of wirerope.
Optionally, the inner wall pivot bush unit of the outer of the next magnet and valve pipe, the top of the bottom magnet with it is upper
The magnetic pole of position magnet bottom is opposite.
Optionally, there are two semicylinders to constitute for the moving body, and two semicylinders are carried out by the bolt of two sides
It is fixedly connected, the outer of the moving body and the inner wall pivot bush unit of valve pipe.
Optionally, the material of the moving body, valve rod and limit shaft is copper.
Optionally, the upper magnet bottom is greater than through slot with the distance values at the top of limit shaft and is located at the length inside notch
Value, the upper magnet and valve handle activity are socketed.
The present invention have it is following the utility model has the advantages that
1, the high Spring-Loaded Pressure Relief Valve of the spring service life first makees valve rod by repulsion of the upper magnet to the next magnet
With, when the pressure medium inside closed pressure vessel is in pressure threshold as defined in system or so, pressure release and closing are carried out,
And be clamped by the notch of axis and valve inside pipe wall, so that spring is in stable compressive state always, so as to avoid second
Spring is discharged long lasting for compression, causes the coefficient of elasticity of second spring to reduce very fast, so that the service life of second spring
It reduces, to affect the quality of relief valve.
2, the high Spring-Loaded Pressure Relief Valve of the spring service life, by the pressure medium inside closed pressure vessel be greater than be
Unite authorized pressure certain value when, using limit shaft make valve rod drive moving body move up, recycle the elastic force of second spring into
Row pressure release avoids only when carrying out pressure release with magnetic force, and the moving distance value of valve rod can be very short, has a fixing to the efficiency of pressure release
It rings.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the partial cross sectional views of Fig. 1 of the present invention；
Fig. 3 is structure of the invention moving body schematic diagram；
Fig. 4 is the cut away view of structure of the invention Fig. 3 moving body.
In figure: 1, valve body；2, valve pipe；21, notch；3, control pipe；4, sealing ring；5, valve rod；51, spool；52, the next magnetic
Body；53, limit shaft；54, through slot；6, moving body；61, sliding slot；62, movable block；63, wirerope；64, axis；65, the first bullet
Spring；7, upper magnet；8, second spring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-4, a kind of Spring-Loaded Pressure Relief Valve that spring service life is high, including valve body 1, valve pipe 2 and control
Pipe 3, valve pipe 2 are connected to the top of valve body 1 by flange seal, and control pipe 3 is threaded in the top of valve pipe 2, valve body 1 and valve
The inside fixing sleeve of 2 junction of pipe is equipped with sealing ring 4, and the middle part of sealing ring 4 is movably installed with valve rod 5, and the bottom end of valve rod 5 is fixed
It is connected with the spool 51 being located inside valve body 1, the top of valve rod 5 extends to the inside of control pipe 3, and fixing sleeve is equipped on valve rod 5
Positioned at the next magnet 52 of 2 intracavity bottom of valve pipe, the outer of the next magnet 52 and the inner wall pivot bush unit of valve pipe 2 do not influence valve
Bar 5 and the next magnet 52 move in valve pipe 2 together, and the magnetic pole of the top of the next magnet 52 and upper 7 bottom of magnet is on the contrary, benefit
Closure effect is realized, close so that spool 51 is close to the valve seat inside valve body 1 with the repulsion of 7 pairs of upper magnet the next magnets 52
When closing the pressure medium inside pressure vessel slightly larger than pressure threshold as defined in system, only pass through 7 pairs of upper magnet the next magnetic
The repulsion of body 52 carries out pressure release and closing, reduces the use of second spring 8, and fixing sleeve, which is equipped with, on valve rod 5 is located at the next magnet 52
The limit shaft 53 of top, by the spacing at 52 top of control 53 bottom of limit shaft and the next magnet, limit shaft 53 is moved to upper
When magnet 7, the repulsion value of 7 pairs of upper magnet the next magnets 52, according to circumstances to need to control inside closed pressure vessel
Pressure medium is in pressure threshold as defined in system, and the repulsion value of 7 pairs of upper magnet the next magnets 52 can pass through experiment in advance
Know, the middle part of valve rod 5 offers through slot 54, through slot 54 and 63 pivot bush unit of wirerope, and the bottom of 54 inner cavity of through slot is close
The top of the bottom of wirerope 63,54 inner cavity of through slot is not contacted with the top of wirerope 63, when valve rod 5 moves up, will drive steel
The middle part of cord 63 moves up, and the movement of movable block 62 is held, so that axis 64 is separated with notch 21, to may make on moving body 6
It moves, the moving body 6 being movably installed on valve rod 5 above limit shaft 53, the material of moving body 6, valve rod 5 and limit shaft 53 is equal
For copper, it is ensured that moving body 6, valve rod 5 and limit shaft 53 are not interfere with each other with upper magnet 7 and the next magnet 52, and there are two moving bodys 6
Semicylinder is constituted, and two semicylinders are fixedly connected by the bolt of two sides, outer and the valve pipe 2 of moving body 6
Inner wall pivot bush unit, the moving body 6 being made up of two semicylinders, consequently facilitating the processing of moving body 6, and at two
The parts such as the first spring 65, axis 64, movable block 62 are placed at the middle part of moving body 6, reduce the difficulty for implementing the structure, mobile
The bottom end of body 6 is fixedly connected with upper magnet 7, and the distance values at 53 top of upper 7 bottom of magnet and limit shaft are greater than through slot 54
Length value inside notch 21, upper magnet 7 and 5 pivot bush unit of valve rod, it is ensured that before limit shaft 53 drives moving body 6 to move up,
Axis 64 is separated with notch 21, and the top of valve rod 5 is movably installed with the second spring 8 above moving body 6, the second bullet
Spring 8 is slightly larger than the repulsion of 7 pairs of upper magnet the next magnets 52 to the elastic force of moving body 6, after pressure release, it is ensured that second spring
8 elastic force enables to the axis 64 in moving body 6 to be moved at notch 21, the top and bottom of second spring 8 respectively with shifting
The top of kinetoplast 6 is connected with the top movable of 2 inner cavity of valve pipe, and the two sides at 6 middle part of moving body offer sliding slot 61, two sliding slots
61 internal activity is set with movable block 62, is fixedly connected with wirerope 63 between two movable blocks 62, two movable blocks 62
Side far from wirerope 63 is fixedly connected with axis 64, and one end of axis 64 extends to the outside of moving body 6, movable block 62
Side is fixedly connected with the first spring 65, and 65 movable set of the first spring is on wirerope 63, and the first spring 65 is far from mobile
One end of block 62 is fixedly connected with the side wall of 61 inner cavity of sliding slot, and the side wall of 2 inner cavity of valve pipe offers notch 21, notch 21 and axis
64 one end pivot bush unit is acted on using the elastic force of the first spring 65, so that axis 64 extends to the interior of notch 21 under normal conditions
Portion, so that moving body 6 be fixed, the pressure medium inside closed pressure vessel is in pressure threshold as defined in system
When left and right, only pressure release and closing can be carried out using the repulsion effect of 7 pairs of upper magnet the next magnets 52, so that second spring
8 are in stable state always, improve the service life of second spring 8.
In use, when the pressure medium inside closed pressure vessel is slightly larger than pressure threshold as defined in system, medium
Withstanding spool 51 moves up valve rod 5, carries out pressure release, and after pressure release, the repulsion of 7 pairs of upper magnet the next magnets 52 makes
Spool 51 moves down, valve body 1, when the pressure medium inside closed pressure vessel is greater than pressure threshold as defined in system,
Medium moves up valve rod 5 persistently, after contacting upper magnet 7 by limit shaft 53, drives upper magnet 7 to move up, while valve rod 5
The middle part of wirerope 63 is driven to move up, so that axis 64 is separated with notch 21, moving body 6 is moved up, and carries out pressure release, is utilizing second
The repulsion of spring 8 and 7 pairs of upper magnet the next magnets 52 moves down spool 51, valve body.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high, it is characterised in that: including valve body (1), valve pipe (2) and control
It manages (3), the valve pipe (2) is connected to the top of valve body (1) by flange seal, and the control pipe (3) is threaded in valve pipe
(2) the inside fixing sleeve of top, the valve body (1) and valve pipe (2) junction is equipped with sealing ring (4), the sealing ring (4)
Middle part is movably installed with valve rod (5), and the bottom end of the valve rod (5) is fixedly connected with the spool (51) internal positioned at valve body (1), institute
The top for stating valve rod (5) extends to the inside of control pipe (3), and fixing sleeve, which is equipped with, on the valve rod (5) is located at valve pipe (2) interior bottom of chamber
The next magnet (52) in portion, fixing sleeve is equipped with the limit shaft (53) being located above the next magnet (52) on the valve rod (5), described
It is offered in the middle part of valve rod (5) through slot (54), the moving body being movably installed on the valve rod (5) above limit shaft (53)
(6), the bottom end of the moving body (6) is fixedly connected with upper magnet (7), and the top of the valve rod (5), which is movably installed with, to be located at
Second spring (8) above moving body (6), the top and bottom of the second spring (8) respectively with the top of moving body (6) and
The top movable of valve pipe (2) inner cavity connects, and the two sides in the middle part of the moving body (6) offer sliding slot (61), two cunnings
The internal activity of slot (61) is set with movable block (62), is fixedly connected with wirerope (63) between two movable blocks (62),
The side of the separate wirerope (63) of two movable blocks (62) is fixedly connected with axis (64), one end of the axis (64)
The outside of moving body (6) is extended to, the side of the movable block (62) is fixedly connected with the first spring (65), first spring
(65) movable set is on wirerope (63), and the one end of the first spring (65) far from movable block (62) and sliding slot (61) inner cavity
Side wall is fixedly connected, and the side wall of valve pipe (2) inner cavity offers notch (21).
2. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: the notch
(21) with one end pivot bush unit of axis (64).
3. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: the through slot
(54) with wirerope (63) pivot bush unit, and the bottom of through slot (54) inner cavity is close to the bottom of wirerope (63), the through slot
(54) top of inner cavity is not contacted with the top of wirerope (63).
4. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: the bottom
The outer of magnet (52) and the inner wall pivot bush unit of valve pipe (2), the top and upper magnet (7) bottom of the bottom magnet (52)
Magnetic pole it is opposite.
5. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: the movement
There are two semicylinders to constitute for body (6), and two semicylinders are fixedly connected by the bolt of two sides, the moving body
(6) the inner wall pivot bush unit of outer and valve pipe (2).
6. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: the movement
The material of body (6), valve rod (5) and limit shaft (53) is copper.
7. a kind of Spring-Loaded Pressure Relief Valve that spring service life is high according to claim 1, it is characterised in that: described upper
Distance values at the top of magnet (7) bottom and limit shaft (53) are greater than through slot (54) and are located at the internal length value of notch (21), described
Upper magnet (7) and valve rod (5) pivot bush unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540519.3A CN109373027B (en) | 2018-12-17 | 2018-12-17 | Spring relief valve that spring life is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540519.3A CN109373027B (en) | 2018-12-17 | 2018-12-17 | Spring relief valve that spring life is high |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109373027A true CN109373027A (en) | 2019-02-22 |
| CN109373027B CN109373027B (en) | 2023-06-13 |
Family
ID=65374202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811540519.3A Active CN109373027B (en) | 2018-12-17 | 2018-12-17 | Spring relief valve that spring life is high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109373027B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008586A (en) * | 2021-02-14 | 2021-06-22 | 梅晓靖 | Detection device for reducing temperature and pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB520771A (en) * | 1937-11-02 | 1940-05-02 | Kockums Mekaniska Verkstads Ab | Improvements in or relating to valve controlling means |
| CN87103483A (en) * | 1987-05-06 | 1988-11-23 | 林泽松 | Closed-open unit for fluid in sealed pipe |
| CN2078836U (en) * | 1990-09-15 | 1991-06-12 | 大连理工大学 | Leading safety valve for pressure containers |
| US6182678B1 (en) * | 1999-11-18 | 2001-02-06 | Young & Franklin, Inc. | Apparatus for safely installing and removing spring failsafe actuator |
| US20130056661A1 (en) * | 2010-05-05 | 2013-03-07 | Tianjin Changing Power Technology Co., Ltd. | Actuation system for electromagnetic valves |
| CN202091583U (en) * | 2011-05-20 | 2011-12-28 | 彭国军 | Overflow relief valve |
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| CN105465430A (en) * | 2015-02-17 | 2016-04-06 | 江苏瑞朗博机械设备有限公司 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
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