CN105909838A - High-temperature, high-pressure and high-corrosion resistance over-pressure protector - Google Patents
High-temperature, high-pressure and high-corrosion resistance over-pressure protector Download PDFInfo
- Publication number
- CN105909838A CN105909838A CN201610385676.6A CN201610385676A CN105909838A CN 105909838 A CN105909838 A CN 105909838A CN 201610385676 A CN201610385676 A CN 201610385676A CN 105909838 A CN105909838 A CN 105909838A
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- China
- Prior art keywords
- spring
- pressure
- main body
- overvoltage protector
- plug screw
- 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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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
- 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
- F16K17/06—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 special arrangements for adjusting the opening pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F16K1/36—Valve members
-
- 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
- F16K1/46—Attachment of sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to high-temperature, high-pressure and high-corrosion resistance over-pressure protector which is characterized by comprising a sealing cover, an over-pressure protector main body, a valve element component and a spring component, wherein the valve element component is arranged in the over-pressure protector main body; and the valve element component and the spring component form a force balancing system. According to the technical scheme, the high-temperature, high-pressure and high-corrosion over-pressure protector is suitable for pressure over-pressure protection of all production process control devices with pressure sources or fields; and by regulating settings of a technological pressure value mechanism (the spring component), the over-pressure protection of a pressure value can be effectively regulated, and an over-pressure pressure source is rapidly cut off, so that safe protection of the process control devices or the fields is realized, and the double benefits of safety production and device protection are gained.
Description
Technical field
The present invention relates to a kind of protector, be specifically related to a kind of HTHP and be able to bear strong corrosion overvoltage protector, belong to pressure
Protection automatic control technology field.
Background technology
Stress control and utilization are can't do without in industrial processes, but the complexity of production process is often difficult to ensure that pressure source
Pressure constant, raising suddenly of pressure process is a potential safety hazard the severeest of whole system and device.Light-duty essence
Close device (such as measuring instruments) is often especially sensitive to overvoltage, the most then the performance of breaking plant, and the overvoltage of super large can also be direct
Breaking plant, makes pressure medium leak.Owing to the pressure medium leaked is all with the highest pressure, operating personnel are had directly
Security threat, if strong corrosive media with pressure (such as sulfuric acid, hydrochloric acid etc.), it is also possible to lead to major accident, in order to solve
This technical problem, those skilled in the art has attempted to new scheme, but this problem is never properly settled.
Summary of the invention
In order to solve the problem of above-mentioned existence, the invention discloses a kind of HTHP and be able to bear strong corrosion overvoltage protector, should
Technical scheme simple in construction, compact, all production processes with pressure source are controlled devices or the pressure at scene by this technical scheme
Power overvoltage protection, arranges adjustment through operation pressure value mechanism, can be effectively realized the overvoltage protection adjusting force value, quickly
Cut off the pressure source of overvoltage, to realize process control equipment or the safeguard protection at scene, receive safety in production and protection device
Double benefit.To achieve these goals, technical scheme is as follows, and HTHP is able to bear strong corrosion overvoltage protector,
It is characterized in that, described overvoltage protector includes sealing lid, overvoltage protector main body, core assembly and spring assembly, described
Core assembly is arranged in overvoltage protector cylinder, and described core assembly constitutes force balancing system with spring assembly.
As a modification of the present invention, described spring assembly includes that spring planet, spring, pogo barrel, spring adjust
Plug screw and spring adjust plug screw fastening screw, and described spring is arranged in pogo barrel, and one end of pogo barrel arranges spring
Supporting plate, the other end is provided with spring and adjusts plug screw and spring adjustment plug screw fastening screw.
As a modification of the present invention, described sealing covers and is additionally provided with O RunddichtringO.
As a modification of the present invention, described core assembly includes spool main body, oval O-ring seals, polytetrafluoroethyl-ne
Alkene valve core seal ring and stress dish, described oval O-ring seals, polytetrafluoroethylene (PTFE) valve core seal ring and stress dish are arranged on
In spool main body.
As a modification of the present invention, described spool main body small end cylindrical section axially middle part pumping slot, it is used for oval O is installed
Shape sealing ring, it is achieved the valve pocket movable sealing buffer action to pogo barrel space；The big end of spool main body and stress dish combination grip
Fixing teflin ring.
As a modification of the present invention, described sealing ring uses polytetrafluoroethylmaterial material, makes full use of polytetrafluoroethylene (PTFE)
Corrosion-resistant and the high-temperature stability of spectrum, and seal circle is set to slab construction, improves fastness and the technology of installation
Reliability, and process the fillet of R0.5mm at the position that seals of seal, it is ensured that the sealing that valve port is closed is reliable.
As a modification of the present invention, described oval O-ring seals uses fluorubber material, makes full use of fluorubber and exists
In all elastomers, chemical stability is the highest, and medium-resistance is best, has fabulous resistance to elevated temperatures and excellent physical machine
Tool performance, it is ensured that the engineering reliability of the present invention.
HTHP is able to bear strong corrosion overvoltage protector processing method, it is characterised in that described manufacturing process following 1) machine adds
Work seals the machined piece in lid, overvoltage protector main body, core assembly, spring planet, spring, pogo barrel, spring tune
Whole plug screw, spring adjust plug screw fastening screw, should meet drawing requirement after inspection；2) by overvoltage protector main body and pogo barrel
Behind location, laser welding connects；3) assembling core assembly: cleaning spool main body, ellipse O is loaded in cylinder by band lubricating oil
In section groove；By the teflon seal of slab construction direction by drawing, load the big end of spool main body, load onto stress
Dish, tightens；4) main body after core assembly small end cylindrical section band lubricating oil loads welding；5) load sealing cap assemblies, tighten；
6) in pogo barrel, spring planet, spring, spring adjustment plug screw are loaded；Experimental examination: 7) (P1 end fills to load pressure test bench
Enter pressure test bench interface), P2 end is screwed into test Pressure gauge；Testing stand pressurizes, and precession spring adjusts plug screw, until pointer
Instruction, to the 80% of the specified indicating value of Pressure gauge, stops the precession of plug screw, fastening screw is loaded pogo barrel, tightens；8) continue to add
Pressure, indicator should be without compression motion this moment.
Relative to prior art, advantages of the present invention is as follows, 1) whole Technical Design is ingenious, simple and compact for structure,
Being applied to all have HTHP, the industrial processes of deep-etching operating mode need overvoltage protection, fast shut-off pressure in controlling
The equipment in power source, on-the-spot etc.；2) this technical scheme uses pressure balance principle, it is achieved spring mechanism adjusts the machine controlling pressure
Reason, reaches the purpose that pressure overvoltage controls；3) this technical scheme uses special assembled core assembly design, and valve port PTFE is close
Envelope；Use special oval fluororubber O-type sealing ring " piston " sealing mechanism；It is applicable to all production processes with pressure source
Control device or the pressure overvoltage protection at scene, adjustment is set through operation pressure value mechanism, adjustment pressure can be effectively realized
The overvoltage protection of force value, the pressure source of fast shut-off overvoltage, to realize process control equipment or the safeguard protection at scene, receive
Safety in production and the double benefit of protection device.
Accompanying drawing explanation
Fig. 1, Fig. 2 are mechanism's force balance principle schematic diagram；
Fig. 3 is that HTHP overvoltage protector of being able to bear strong corrosion always is schemed；
Fig. 4 is core assembly structure enlarged diagram；
In figure: 1, seal lid, 2, overvoltage protector main body, 3, core assembly, 4, spring planet, 5, spring, 6, pogo barrel, 7,
Spring adjusts plug screw, 8, spring adjust plug screw fastening screw, 9, O RunddichtringO, 301, spool main body, 302, oval O shape seals
Circle, 303, polytetrafluoroethylene (PTFE) valve core seal ring, 304, stress dish.
Detailed description of the invention
In order to deepen that the present invention is appreciated and understood by, below in conjunction with the accompanying drawings and detailed description of the invention, this it is further elucidated with
Invention.
Embodiment 1:
Seeing Fig. 1, Fig. 2, the equilibrium principle of the present invention is as follows: see Fig. 1, when part spool 12 holds greatly stress to set pressure with spring 13
During dynamic balance, the normal feed flow of patent of the present invention is to running gear；Seeing that Fig. 1, pressure source P enter from the entrance that figure is following, pressure is situated between
Matter is full of inner chamber, and when spool 12 holds greatly stress and spring 13 to set pressure balance (see formula 1), spool holding position is constant, medium
Through gap 14, upper end O mouth flowing out, patent of the present invention ensure that device is properly functioning.Condition is shown in formula (1).
R2×π×pIt is situated between=PIf... ... ... .. formula (1)
In formula:
R2 Square (the cm of=spool big end radius2)
π=3.14
pIt is situated betweenPressure source pressure (kg/cm2)
PIfSpring sets pressure (kg/cm2)
When system pressure P raises suddenly, spool 12 holds greatly stress to strengthen suddenly, owing to the pressure raised sets higher than part spring 13
During pressure, patent spool 12 of the present invention just breaks through spring resistance, moves to right close port, is cut for the gap of circulation medium
Disconnected, in figure, O mouth flows out without medium.Running gear enters by guard mode；See that Fig. 2, condition are shown in formula (2).
R2×π×pIt is situated between＞ PIf... ... ... .. formula (2)
In formula:
R2 Square (the cm of=spool big end radius2)
π=3.14
pIt is situated betweenPressure source pressure (kg/cm2)
PIfSpring sets pressure (kg/cm2)
When system pressure P declines, and part spool 12 holds greatly stress to decrease suddenly, and it is big equal to or more than spool that spring sets pressure
End stress, spool moves to left, and valve port reopens.
Seeing Fig. 3, a kind of HTHP is able to bear strong corrosion overvoltage protector, and described overvoltage protector includes sealing lid 1, overvoltage
Protector main body 2, core assembly 3 and spring assembly, described core assembly is arranged in overvoltage protector cylinder, described spool
Assembly constitutes force balancing system with spring assembly, and described spring assembly includes that spring planet 4, spring 5, pogo barrel 6, spring are adjusted
Whole plug screw 7 and spring adjust plug screw fastening screw 8, and described spring is arranged in pogo barrel 6, and one end of pogo barrel 6 sets
Putting spring planet 4, the other end is provided with spring and adjusts plug screw 7 and spring adjustment plug screw fastening screw 8；Described sealing covers and also sets
It is equipped with O RunddichtringO 9.This technical scheme is applicable to all production processes with pressure source and controls device or the pressure mistake at scene
Pressure protection, arranges adjustment through operation pressure value mechanism, can be effectively realized the overvoltage protection adjusting force value, fast shut-off
The pressure source of overvoltage, to realize process control equipment or the safeguard protection at scene, receives the double of safety in production and protection device
Weight benefit.
Embodiment 2: see Fig. 3, Fig. 4, as a modification of the present invention, described core assembly include spool main body 301,
Oval O-ring seals 302, polytetrafluoroethylene (PTFE) valve core seal ring 303 and stress dish 304, described oval O-ring seals 302, poly-
Tetrafluoroethene valve core seal ring 303 and stress dish 304 are arranged in spool main body 301, described spool main body small end cylindrical section
Axially middle part pumping slot, is used for installing oval O-ring seals, it is achieved the valve pocket movable sealing buffer action to pogo barrel space；Valve
The big end of core main body and stress dish 304 combination grip fix teflin ring 303.In assembly, spool main body 301 is accurate
Machined piece, with overvoltage protector main body 2 inner hole of accompanying drawing 3 after the oval O-ring seals of its small end cylindrical section dress, is formed
" piston " device, can promote valve port to open and close, and stress dish 304 is also machined piece, and large end face is medium force side, is valve
The sensitive execution end face that core runs, the back side devises connecting stud, is connected with spool main body 301, is used for fixing and clamp poly-four
PVF valve core seal ring 303.Small end body diameter is φ 6, owing to cross section is the least, uses conventional O RunddichtringO, specification
Sealing ring groove depth, will significantly attenuate main body mechanical strength and rigidity, one of inventive feature is, specialized designs oval cross section
O-ring seals as the dynamic seal of the present invention, both ensure that the area after sealing ring compression, decreased again groove depth, it is ensured that
The mechanical strength of main body " piston " section and rigidity.Remaining structure is identical with embodiment 1 with advantage.
Embodiment 3: see Fig. 3, Fig. 4, as a modification of the present invention, described sealing ring 303 uses polytetrafluoroethylene (PTFE)
Material, makes full use of the corrosion-resistant of polytetrafluoroethylene (PTFE) spectrum and high-temperature stability, and seal circle is set to slab construction, carries
Rise the fastness and the reliability of technology installed, and processed the fillet of R0.5mm at the position that seals of seal, it is ensured that valve
The sealing that mouth is closed is reliable.Remaining structure is identical with embodiment 1 with advantage.
Embodiment 4: see Fig. 3, Fig. 4, as a modification of the present invention, described oval O-ring seals 9 uses fluorubber
Material.Making full use of fluorubber chemically stable body in all elastomers the highest, medium-resistance is best, has fabulous resistance to height
Warm nature can be with excellent physical and mechanical properties, it is ensured that the engineering reliability of the present invention.Remaining structure and advantage are complete with embodiment 1
Exactly the same.
Embodiment 5: see Fig. 3, Fig. 4, HTHP is able to bear strong corrosion overvoltage protector processing method, and described manufacturing process is such as
Lower 1) machined piece during machining seals lid 1, overvoltage protector main body 2, core assembly 3, spring planet 4, spring 5, bullet
Spring sleeve pipe 6, spring adjust plug screw 7, spring adjusts plug screw fastening screw 8, should meet drawing requirement after inspection；2) by overvoltage protection
After device main body 2 and pogo barrel 6 location, laser welding connects；3) assembling core assembly 3: cleaning spool main body, band lubricating oil will
Oval O loads in the groove of cylinder stage casing；By the teflon seal of slab construction direction by drawing, load valve
The big end of core main body, loads onto stress dish, tightens；4) main body after core assembly small end cylindrical section band lubricating oil loads welding；5) dress
Enter to seal lid 1 assembly (01/09), tighten；6) in pogo barrel, spring planet 4/ spring 5/ spring adjustment plug screw 7 is loaded；Examination
Test inspection: 7) load pressure test bench (P1 end loads pressure test bench interface), P2 end is screwed into test Pressure gauge；Testing stand adds
Pressure, precession spring adjusts plug screw 7, until pointer indicates the 80% of the specified indicating value of Pressure gauge, stops the precession of plug screw, will only
Determine screw and load pogo barrel 8, tighten；8) continuing pressurization, indicator should be without compression motion this moment.
Seeing Fig. 3, Fig. 4, in figure, P1 is pressure source inlet, and P2 is pres-sure medium outlet, the dress that in figure, double chain line are drawn
Putting the Y150 Pressure gauge being to simulate and be installed on overvoltage protector outlet, component operation mechanism: see accompanying drawing 4, in figure, Ps is that spring is adjusted
The power formed after whole, pushes away core assembly toward left side, occurs aforementioned such as the gap 4 of A in figure, valve port unlatching；Pressure source is entered by P1
Entering valve pocket, through gap 14, P2 go out, condition at this moment is pressure source PA=Ps in figure.
Skyrocketing when entering P1 pressure source pressure, stress dish 304 surface reinforcement, after PA ＞ Ps, i.e. spool stress dish reinforcement
Gross thrust is more than the spring pressure set, and spring is compressed, and core assembly moves to right, and valve port is closed, thus realizes cutting off P2 outlet
Pressure source.
Declining when entering P1 pressure source pressure, stress dish 304 surface subtracts power, recovers PA=Ps state, and it is extensive that spring sets pressure
Multiple, core assembly moves to left again, and valve port reopens, and pressure medium flows out from P2 outlet again；The most repeatedly.
It is new that at least one in technical characteristic described in embodiment 2,3,4 and embodiment 1 can also be combined formation by the present invention
Embodiment.
It should be noted that above-described embodiment is only presently preferred embodiments of the present invention, it is not used for limiting the present invention
Protection domain, the equivalent made on the basis of technique scheme or replacement, belong to the protection model of the present invention
Enclose.
Claims (8)
1. a HTHP is able to bear strong corrosion overvoltage protector, it is characterised in that described overvoltage protector includes sealing lid, overvoltage
Protector main body, core assembly and spring assembly, described core assembly is arranged in overvoltage protector cylinder, described spool group
Part constitutes force balancing system with spring assembly.
A kind of HTHP the most according to claim 1 is able to bear strong corrosion overvoltage protector, it is characterised in that described groups of springs
Part includes that spring planet, spring, pogo barrel, spring adjust plug screw and spring adjusts plug screw fastening screw, and described spring sets
Putting in pogo barrel, one end of pogo barrel arranges spring planet, and the other end is provided with spring and adjusts plug screw and spring adjustment
Plug screw fastening screw.
A kind of HTHP the most according to claim 2 is able to bear strong corrosion overvoltage protector, it is characterised in that described sealing lid
On be additionally provided with O RunddichtringO.
A kind of HTHP the most according to claim 2 is able to bear strong corrosion overvoltage protector, it is characterised in that described spool group
Part includes that spool main body, oval O-ring seals, polytetrafluoroethylene (PTFE) valve core seal ring and stress dish, described oval O shape seal
Circle, polytetrafluoroethylene (PTFE) valve core seal ring and stress dish are arranged in spool main body.
5. it is able to bear strong corrosion overvoltage protector according to a kind of HTHP described in Claims 2 or 3, it is characterised in that described valve
Core main body small end cylindrical section axially middle part pumping slot, is used for installing oval O-ring seals, it is achieved pogo barrel space is moved by valve pocket
Seal isolation effect；The big end of spool main body and stress dish combination grip fix teflin ring.
A kind of HTHP the most according to claim 5 is able to bear strong corrosion overvoltage protector, it is characterised in that described sealing ring
Using polytetrafluoroethylmaterial material, seal circle is set to slab construction, processes the circle of R0.5mm at the position that seals of seal
Angle, it is ensured that the sealing that valve port is closed is reliable.
A kind of HTHP the most according to claim 6 is able to bear strong corrosion overvoltage protector, it is characterised in that described oval O
Shape sealing ring uses fluorubber material.
8. HTHP is able to bear strong corrosion overvoltage protector processing method, it is characterised in that described manufacturing process following 1) machining
Seal the machined piece in lid, overvoltage protector main body, core assembly, spring planet, spring, pogo barrel, spring adjustment
Plug screw, spring adjust plug screw fastening screw, should meet drawing requirement after inspection；2) by fixed to overvoltage protector main body and pogo barrel
After Wei, laser welding connects；3) assembling core assembly: cleaning spool main body, ellipse O is loaded cylinder stage casing by band lubricating oil
In groove；By the teflon seal of slab construction direction by drawing, load the big end of spool main body, load onto stress
Dish, tightens；4) main body after core assembly small end cylindrical section band lubricating oil loads welding；5) load sealing cap assemblies, tighten；
6) in pogo barrel, spring planet, spring, spring adjustment plug screw, experimental examination: 7 are loaded) (P1 end fills to load pressure test bench
Enter pressure test bench interface), P2 end is screwed into test Pressure gauge；Testing stand pressurizes, and precession spring adjusts plug screw, until pointer
Instruction, to the 80% of the specified indicating value of Pressure gauge, stops the precession of plug screw, fastening screw is loaded pogo barrel, tightens；8) continue to add
Pressure, indicator should be without compression motion this moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385676.6A CN105909838A (en) | 2016-06-03 | 2016-06-03 | High-temperature, high-pressure and high-corrosion resistance over-pressure protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385676.6A CN105909838A (en) | 2016-06-03 | 2016-06-03 | High-temperature, high-pressure and high-corrosion resistance over-pressure protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105909838A true CN105909838A (en) | 2016-08-31 |
Family
ID=56742110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610385676.6A Pending CN105909838A (en) | 2016-06-03 | 2016-06-03 | High-temperature, high-pressure and high-corrosion resistance over-pressure protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909838A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2273991A1 (en) * | 1974-06-07 | 1976-01-02 | Sarasin & Cie Ets | Pressure gauge protection valve - prevents pressure build up due to leaks by venting gauge to atmosphere |
| JPS61244977A (en) * | 1985-04-23 | 1986-10-31 | Takayuki Miyao | Changeover valve |
| CN1058845A (en) * | 1990-08-10 | 1992-02-19 | 中国科学院金属研究所 | A kind of corrosion resisting pressure regulator and reparation technology thereof |
| CN204942651U (en) * | 2015-09-25 | 2016-01-06 | 四川金星清洁能源装备股份有限公司 | Pressure gauge Protective valve |
| CN206130224U (en) * | 2016-06-03 | 2017-04-26 | 安徽天康(集团)股份有限公司 | High temperature high pressure overvoltage protector that is able to bear strong corrosion |
-
2016
- 2016-06-03 CN CN201610385676.6A patent/CN105909838A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2273991A1 (en) * | 1974-06-07 | 1976-01-02 | Sarasin & Cie Ets | Pressure gauge protection valve - prevents pressure build up due to leaks by venting gauge to atmosphere |
| JPS61244977A (en) * | 1985-04-23 | 1986-10-31 | Takayuki Miyao | Changeover valve |
| CN1058845A (en) * | 1990-08-10 | 1992-02-19 | 中国科学院金属研究所 | A kind of corrosion resisting pressure regulator and reparation technology thereof |
| CN204942651U (en) * | 2015-09-25 | 2016-01-06 | 四川金星清洁能源装备股份有限公司 | Pressure gauge Protective valve |
| CN206130224U (en) * | 2016-06-03 | 2017-04-26 | 安徽天康(集团)股份有限公司 | High temperature high pressure overvoltage protector that is able to bear strong corrosion |
Non-Patent Citations (1)
| Title |
|---|
| 吕永超,李智杰,陈卫华: "弹簧管压力表的正确选择、安装与使用维护", 《仪表技术》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160831 |