CN105697840B - A kind of low-temperature brake valve - Google Patents
A kind of low-temperature brake valve Download PDFInfo
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- CN105697840B CN105697840B CN201410710570.XA CN201410710570A CN105697840B CN 105697840 B CN105697840 B CN 105697840B CN 201410710570 A CN201410710570 A CN 201410710570A CN 105697840 B CN105697840 B CN 105697840B
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Abstract
The invention discloses a kind of low-temperature brake valve, belong to valve field.The low-temperature brake valve includes：Valve body, the bonnet on the valve body, flashboard, the flashboard upper valve rod at the top of the flashboard, the flashboard lower valve rod installed in the flashboard bottom and the functional unit being connected with the flashboard upper valve rod, high pressure chest and low pressure chamber are respectively disposed with the valve body of the flashboard both sides, the first pipeline for inputting anti-icing fluid is provided with the valve body of the high pressure chest side, one end of first pipeline connects with the high pressure chest, and the low-temperature brake valve also includes：The switch valve being arranged on first pipeline.Low-temperature brake valve provided in an embodiment of the present invention on the valve body of high pressure chest side by opening up the first pipeline for inputting anti-icing fluid, anti-icing fluid is inputted by the first pipeline, cryogenic liquid at high pressure chest is thawed, ensures normal work in the coal bed gas well that the low-temperature brake valve can be at low ambient temperatures.
Description
Technical field
The present invention relates to valve field, more particularly to a kind of low-temperature brake valve.
Background technology
Low-temperature brake valve is a kind of stop valve, for controlling the keying of cryogen.
Existing low-temperature brake valve is widely used in liquefied natural gas field, and the operating temperature of the low-temperature brake valve is more than 0 DEG C,
With the northwardly development of coal bed gas well, northerly winter coal bed gas well needs to work at a lower temperature, and coal bed gas
Low-temperature brake valve in well is needed to transport cryogenic liquid, and cryogenic liquid is easily tied at the high pressure chest of low-temperature brake valve at low ambient temperatures
Freeze, the cryogenic liquid after freezing can block high pressure chest so that the cryogenic liquid in existing low-temperature brake valve can not after freezing
Work on.
The content of the invention
In order to solve the problems, such as that the cryogenic liquid in low-temperature brake valve of the prior art can not work on after freezing, this
Inventive embodiments provide a kind of low-temperature brake valve.The technical scheme is as follows：
The embodiments of the invention provide a kind of low-temperature brake valve, the low-temperature brake valve includes：Valve body, on the valve body
Bonnet, flashboard, the flashboard upper valve rod at the top of the flashboard, the flashboard lower valve rod installed in the flashboard bottom and
The functional unit being connected with the flashboard upper valve rod, high pressure chest and low pressure are respectively disposed with the valve body of the flashboard both sides
Chamber, is provided with the first pipeline for inputting anti-icing fluid on the valve body of the high pressure chest side, and the one of first pipeline
End connects with the high pressure chest, and the low-temperature brake valve also includes：The switch valve being arranged on first pipeline.
Specifically, first pipeline is connected by the first connection component with the valve body, and peace is provided with the valve body
The first mounting hole of first connection component is filled, first connection component includes the first union head, the first screw rod and suit
The first union on the first union head is female, and one end of the first union head is fixedly connected with first pipeline, institute
The other end for stating the first union head is offseted by the female one end with first screw rod of first union, first screw rod
The other end is arranged in first mounting hole, and first screw rod connects the height with being provided with the first union head
Press the cavity of chamber and first pipeline.
Further, first mounting hole is arranged on the ring flange of the valve body, the axis of first mounting hole
Overlapped with the radius of the ring flange.
Specifically, the material of first pipeline is stainless steel.
Specifically, the switch valve is triple valve, is provided with valve-rod cavity on the valve body and the bonnet, on the flashboard
Valve rod and the flashboard lower valve rod are respectively positioned in the valve-rod cavity, and the second pipeline, second pipeline are provided with the valve body
One end connected with the valve-rod cavity, the other end of second pipeline passes through the triple valve and first pipeline connection.
Further, second pipeline is connected by the second connection component with the valve body, is provided with the valve body
Second mounting hole of second connection component is installed, second connection component includes the second union head, is sleeved on described the
The second union on two union heads is female and the second screw rod, one end of the second union head are fixedly connected with second pipeline,
The other end of the second union head is connected by the female one end with second screw rod of second union, second screw rod
The other end stretch into second mounting hole, second screw rod connects the valve with being provided with the second union head
The cavity of rod cavity and second pipeline.
Further, the low-temperature brake valve also includes：First airtight and watertight padding and interior pressure cap, first is provided with the bonnet
Airtight and watertight padding mounting hole, first airtight and watertight padding are sheathed on the flashboard upper valve rod and are arranged in first airtight and watertight padding
In mounting hole, and the size of first airtight and watertight padding close to the valve-rod cavity side is more than away from the valve-rod cavity side
The size of first airtight and watertight padding, the edge of first airtight and watertight padding is provided with interior pressure cap mounting hole on the valve body,
The interior pressure cap is arranged in the interior pressure cap mounting hole.
Further, the outer surface of first airtight and watertight padding is stepped ramp type.
Further, the low-temperature brake valve also includes：Second airtight and watertight padding and outer pressure cap, it is provided with the top of the bonnet
Second airtight and watertight padding mounting hole, second airtight and watertight padding are sheathed on the flashboard upper valve rod and are arranged in second sealing
In filler mounting hole, the edge of second airtight and watertight padding is provided with outer pressure cap mounting hole, the outer pressure cap on the valve body
It is arranged in the outer pressure cap mounting hole.
Further, the material of first airtight and watertight padding and second airtight and watertight padding is cold resistant rubber.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：Low temperature lock provided in an embodiment of the present invention
Valve, when low-temperature brake valve is in opening or short time closed mode, the low-temperature brake valve can solidify less than cryogenic liquid
Equal energy normal work under the low temperature environment of point, when low-temperature brake valve long-term closing under the low temperature environment, cryogenic liquid can be in height
Freezed at pressure chamber, and high pressure chest is blocked so that the flashboard of low-temperature brake valve can not be normally-open, passes through the valve in high pressure chest side
The first pipeline for inputting anti-icing fluid is opened up on body, anti-icing fluid is inputted to high pressure chest by the first pipeline, will using anti-icing fluid
Cryogenic liquid at high pressure chest is thawed, and the cryogenic liquid and anti-icing fluid after defrosting are flowed into low pressure chamber and then access wall so that
When opening low-temperature brake valve, the cryogenic liquid to freeze will not hinder the unlatching of low-temperature brake valve, so as to ensure that the low-temperature brake valve can be
Normal work in coal bed gas well.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, in being described below in conjunction with accompanying drawing to embodiment
The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of low-temperature brake valve provided in an embodiment of the present invention；
Fig. 2 is the main structure figure of the first connection component provided in an embodiment of the present invention；
Fig. 3 is the side block diagram of the first connection component provided in an embodiment of the present invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiments of the invention provide a kind of low-temperature brake valve, and suitable for low temperature environment, (low temperature environment refers to be less than low temperature
The temperature environment of freezing point) coal bed gas well, as shown in figure 1, the low-temperature brake valve includes：Valve body 1, on valve body 1
Bonnet 2, flashboard 3, the flashboard upper valve rod 4 installed in the top of flashboard 3, the flashboard lower valve rod 5 installed in the bottom of flashboard 3 and with
The attended operation part of flashboard upper valve rod 4, high pressure chest 1a and low pressure chamber 1b, high pressure chest are respectively disposed with the valve body 1 of the both sides of flashboard 3
The first pipeline 7 for inputting anti-icing fluid is provided with the valve body 1 of 1a sides, one end of the first pipeline 7 connects with high pressure chest 1a,
The low-temperature brake valve also includes：The switch valve 6 being arranged on the first pipeline 7.
Wherein, anti-icing fluid can be methanol solution.Functional unit can be flashboard handwheel 18, the transmission of the flashboard handwheel 18
Bar is connected with flashboard upper valve rod 4, and flashboard upper valve rod 4 is arranged on flashboard 3, and through hole 3a is provided with flashboard 3, passes through rotation
Twisting flashboard handwheel 18 makes flashboard upper valve rod 4 drive flashboard 3 to move up and down, when the through hole 3a on flashboard 3 connects with high pressure chest 1a,
The low-temperature brake valve is opened, and when the through hole 3a on flashboard 3 does not connect with high pressure chest 1a, the low-temperature brake valve is closed.
Specifically, as shown in Figures 2 and 3, the first pipeline 7 is connected by the first connection component 9 with valve body 1, is set on valve body 1
Be equipped with installation the first connection component 9 the first mounting hole, the first connection component 9 include the first union head 9a, the first screw rod 9c and
The first union mother 9b being sleeved on the first union head 9a, the first union head 9a one end are fixedly connected with the first pipeline 7, and first
The union head 9a other end is offseted by the first union mother 9b and the first screw rod 9c one end, the first screw rod 9c other end installation
In the first mounting hole, the of connection high pressure chest 1a and the first pipeline 7 is provided with the first screw rod 9c and the first union head 9a
One cavity 9d.First cavity 9d diameter can be identical with the internal diameter of the first pipeline 7, i.e. the diameter of the first cavity 9d is 6mm.
Wherein, union head 9a one end can be achieved a fixed connection with the first pipeline 7 using welding.
Specifically, switch valve 6 can be triple valve, be provided with valve-rod cavity 1c on valve body 1 and bonnet 2, flashboard upper valve rod 4,
Flashboard 3 and flashboard lower valve rod 5 are respectively positioned in valve-rod cavity 1c, and the second pipeline 8, one end of the second pipeline 8 and valve are provided with valve body 1
Rod cavity 1c is connected, and the other end of the second pipeline 8 is connected by triple valve with the first pipeline 7.
Wherein, the external diameter of the first pipeline 7 and the second pipeline 8 can be 10mm, the first pipeline 7 and the second pipeline 8 it is interior
Footpath can be 6mm.
In addition, being provided with adjusting handle 14 on the triple valve, the adjusting handle 14 is used for three pipelines on regulating three-way valve
Between keying.When coal bed gas well coal seam reservoirs low temperature phase change is transformed, by regulator wrench wheel 18, make the through hole 3a of flashboard 3
Do not connected with high pressure chest 1a, realize the closing of low-temperature brake valve, after low-temperature brake valve is closed, the high pressure chest 1a of the coal bed gas well is formed
Confined space, the pressure in its high pressure chest 1a is up to 35MPa, and it is difficult to overcome the pressure by low temperature lock to be by flashboard handwheel 18
Valve is opened, and therefore, the second pipeline 8 is set on valve body 1, by adjusting handle 14, the first pipeline 7 is connected with the second pipeline 8,
Cryogenic liquid in high pressure chest 1a flows into valve-rod cavity 1c, makes valve-rod cavity 1c and high pressure chest 1a pressure balance, so that the energy of flashboard 3
It is enough to obtain the balance pressure from valve-rod cavity 1c, ensure flashboard 3 when being chronically at closed mode, the cryogenic liquid suffered by it
Pressure more balances and stably, beneficial to the unlatching of flashboard 3, while is favorably improved service life and the work of whole low-temperature brake valve
Performance.
Specifically, the material of the first pipeline 7 can be stainless steel.In addition, triple valve, the first connection component 9 and second connect
The material of connected components 10 can be stainless steel.
Further, the material of the first pipeline 7 can be 1Cr18Ni9Ti.In addition, triple valve, the and of the first connection component 9
The material of second connection component 10 can be 1Cr18Ni9Ti.C6H5/Si=6~11% of the 1Cr18Ni9Ti materials, warp
The 1Cr18Ni9Ti materials do not lose elasticity at -90 DEG C after vulcanization so that first pipeline 7, triple valve, the first connection component
9 and second connection component 10 can still be able to keep good sealing property at low ambient temperatures.
The low-temperature brake valve can also include sealing gasket 15, and the sealing gasket 15 is arranged in screw rod 9c end and the first mounting hole
Between, and the diameter identical through hole with cavity 9d is disposed with the sealing gasket 15, the sealing gasket 15 can be red copper sealing gasket,
By screwing screw rod 9c, red copper sealing gasket is compressed, so as to realize the purpose of high pressure sealing.
In the present embodiment, the first union head 9a contacted with the first screw rod 9c one end is pyramid type, the first screw rod 9c
Contact surface with the first union head 9a is infundibulate, and the first screw rod 9c and the first union mother 9b is threadedly coupled, the first screw rod 9c
With the valve body 1 for being provided with the first mounting hole and be connected through a screw thread, by screwing the first screw rod 9c, it is female to compress the first union
9b so that the first union head 9a and the first screw rod 9c contact surface are in line contact sealing.
Further, the second pipeline 8 is connected by the second connection component 10 with valve body 1, and installation second is provided with valve body 1
Second mounting hole of connection component 10, wherein, the first connection component 9 is identical with the structure of the second connection component 10, specifically, the
Two connection components 10 include the second union head, the second union being sleeved on the second union head mother and the second screw rod and (not marked in figure
Show), one end of the second union head is fixedly connected with the second pipeline 8, and the other end of the second union head is female with the by the second union
One end connection of two screw rods, the other end of the second screw rod are stretched into the second mounting hole, are all provided with the second screw rod and the second union head
It is equipped with the cavity of connection valve-rod cavity 1c and the second pipeline 8.
In the present embodiment, the axis of the second connection component 10 can arrange that second connects with high pressure chest 1a diameter parallel
The axis of connected components 10 the top surface distance H=130mm away from valve body, distance H can suitably be adjusted according to real work requirement.
Specifically, the first mounting hole can be arranged on the ring flange of valve body 1, the axis of the first mounting hole and ring flange
Radius overlaps.In addition, multiple screws 19, in actual applications, first mounting hole are axially evenly arranged with the ring flange
Axis can the perpendicular bisector of circle center line connecting of screw 19 adjacent with two overlap.
Further, the low-temperature brake valve can also include：First airtight and watertight padding 12 and interior pressure cap of the outer surface for stepped ramp type
13, the first airtight and watertight padding mounting hole is provided with bonnet 2, and the first airtight and watertight padding 12 is sheathed on flashboard upper valve rod 4 and is arranged in
In first airtight and watertight padding mounting hole, and the size of the first airtight and watertight padding 12 close to valve-rod cavity 1c sides is more than away from valve-rod cavity 1c
The size of first airtight and watertight padding 12 of side, the edge of the first airtight and watertight padding 12 is provided with interior pressure cap mounting hole on valve body 1, it is interior
Pressure cap 13 is arranged in interior pressure cap mounting hole.Interior pressure cap 13 can be threadably secured with interior pressure cap mounting hole.The interior pressure cap 13
For fixing the position of the first airtight and watertight padding 12, meanwhile, it can be further ensured that the first airtight and watertight padding 12 by screwing interior pressure cap 13
Sealing property.
Wherein, the step of the first airtight and watertight padding 12 can be provided with multiple, and in the present embodiment, the first airtight and watertight padding 12 can
To be made up of the different seal washer of multiple outside dimensions, after pressure rise in valve-rod cavity 1c, under pressure, low temperature
First airtight and watertight padding 12 is simultaneously compacted by the upward interior airtight and watertight padding 12 of pressure cap 13 and first of liquid, realizes the pressure in valve-rod cavity 1c
The sealing property of bigger first airtight and watertight padding 12 of power better effect, due to the seal washer of the bottommost of the first airtight and watertight padding 12
Largest outside diameter, by extruding can effective sealing damper upper valve rod 4, prevent leakage at flashboard upper valve rod 4.
Specifically, the top of bonnet 2 is also provided with the second airtight and watertight padding 16 and outer pressure cap 17, and the top of bonnet 2 is set
The second airtight and watertight padding mounting hole is equipped with, second airtight and watertight padding 16 is sheathed on flashboard upper valve rod 4 and is arranged in the second sealing and fills out
Expect in mounting hole, the edge of second airtight and watertight padding 16 is provided with outer pressure cap mounting hole on valve body 1, outer pressure cap 17 is arranged in external pressure
In cap mounting hole.Outer pressure cap 17 can be threadably secured with outer pressure cap mounting hole.Second airtight and watertight padding 16 can be by multiple
External diameter identical seal washer forms, and second airtight and watertight padding 16 can be to lengthen packing layer, and its length can be 150mm, should
Second airtight and watertight padding 16 can prevent low-temperature brake valve at low ambient temperatures, the first airtight and watertight padding 12 because low temperature is shunk and caused by
The problem of leakage.The outer pressure cap 17 is used for the position for fixing the second airtight and watertight padding 16, meanwhile, it can enter one by screwing outer pressure cap 17
Step ensures the sealing property of the second airtight and watertight padding 16.
Further, the material of the first airtight and watertight padding 12 and the second airtight and watertight padding 16 can be cold resistant rubber.
Further, the material of the first airtight and watertight padding 12 and the second airtight and watertight padding 16 can be low-phenyl silicone rubber.
Specifically, bonnet 2 is arranged on valve body 1 by fastening bolt component (not shown), and valve body 1 and bonnet 2 it
Between be disposed with sealing ring 11.
Specifically, plug 20 is also provided with the valve body 1, the plug 20 is arranged around flashboard lower valve rod 5 so that lock
When driving flashboard 3 to move, the flashboard lower valve rod 5 can move wrench wheel 18 along plug 20, and the plug 20 is used to fix
The position of flashboard lower valve rod 5.
It following is a brief introduction of the operation principle of low-temperature brake valve provided in an embodiment of the present invention：
Under low-temperature condition (low-temperature brake valve in the present embodiment can be applied to less than -40 DEG C of low temperature environment), when flashboard 3
After closing, the cryogenic liquid of high pressure chest 1a sides can freeze under low-temperature condition while expand and block high pressure chest 1a, be
The high pressure chest 1a being plugged is dredged, now operates adjusting handle 14, closes the second pipeline 8, the first pipeline 7 is formed path, is led to
To cross the first pipeline 7 and input anti-icing fluid to high pressure chest 1a, anti-icing fluid can thaw the cryogenic liquid to freeze, then, operation regulation hand
Wheel 14, the first pipeline 7 and the second pipeline 8 are connected, the flashboard 3 of low-temperature brake valve is opened after pressure balance, by the Low Temperature Liquid after defrosting
Body heads into low pressure chamber 1b by high pressure chest 1a, and flows into coal bed gas well, and now high pressure chest 1a dredgings finish, then regulator wrench wheel
18 close low-temperature brake valve.
Low-temperature brake valve provided in an embodiment of the present invention, when low-temperature brake valve is in opening or short time closed mode,
The low-temperature brake valve can under the low temperature environment less than the freezing point of cryogenic liquid can normal work, when low-temperature brake valve is in the low temperature ring
Under border during long-term closing, cryogenic liquid can be freezed at high pressure chest, and high pressure chest is blocked so that the flashboard of low-temperature brake valve can not
It is normally-open, by opening up the first pipeline for inputting anti-icing fluid on the valve body of high pressure chest side, by the first pipeline to
High pressure chest inputs anti-icing fluid, and the cryogenic liquid at high pressure chest is thawed using anti-icing fluid, cryogenic liquid and anti-icing fluid after defrosting
Flow into low pressure chamber and then access wall so that when opening low-temperature brake valve, the cryogenic liquid to freeze will not hinder low-temperature brake valve
Open, so as to ensure the low-temperature brake valve can in coal bed gas well normal work.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of low-temperature brake valve, the low-temperature brake valve includes：Valve body, the bonnet on the valve body, flashboard, installed in institute
State the flashboard upper valve rod at the top of flashboard, the flashboard lower valve rod installed in the flashboard bottom and be connected with the flashboard upper valve rod
Functional unit, be respectively disposed with high pressure chest and low pressure chamber, the high pressure chest and first on the valve body of the flashboard both sides
One end connection of pipeline, the low-temperature brake valve also include：The switch valve being arranged on first pipeline, it is characterised in that institute
The first pipeline is stated to be arranged on the valve body of the high pressure chest side, and for inputting anti-icing fluid.
2. low-temperature brake valve according to claim 1, it is characterised in that first pipeline passes through the first connection component and institute
Valve body connection is stated, the first mounting hole for installing first connection component, first connection component are provided with the valve body
It is female including the first union head, the first screw rod and the first union for being sleeved on the first union head, the first union head
One end is fixedly connected with first pipeline, and the other end of the first union head is female with described first by first union
One end of screw rod is offseted, and the other end of first screw rod is arranged in first mounting hole, first screw rod and described
The cavity for connecting the high pressure chest and first pipeline is provided with first union head.
3. low-temperature brake valve according to claim 2, it is characterised in that first mounting hole is arranged at the method for the valve body
On blue disk, the axis of first mounting hole overlaps with the radius of the ring flange.
4. low-temperature brake valve according to claim 1, it is characterised in that the material of first pipeline is stainless steel.
5. according to the low-temperature brake valve described in claim any one of 1-4, it is characterised in that the switch valve is triple valve, described
Valve-rod cavity is provided with valve body and the bonnet, the flashboard upper valve rod and the flashboard lower valve rod are respectively positioned on the valve-rod cavity
It is interior, the second pipeline is provided with the valve body, one end of second pipeline connects with the valve-rod cavity, second pipeline
The other end passes through the triple valve and first pipeline connection.
6. low-temperature brake valve according to claim 5, it is characterised in that second pipeline passes through the second connection component and institute
Valve body connection is stated, the second mounting hole for installing second connection component, second connection component are provided with the valve body
Including the second union head, the second union being sleeved on the second union head is female and the second screw rod, the second union head
One end is fixedly connected with second pipeline, and the other end of the second union head is female with described second by second union
One end connection of screw rod, the other end of second screw rod stretched into second mounting hole, second screw rod and described the
The cavity for connecting the valve-rod cavity and second pipeline is provided with two union heads.
7. low-temperature brake valve according to claim 5, it is characterised in that the low-temperature brake valve also includes：First airtight and watertight padding
With interior pressure cap, the first airtight and watertight padding mounting hole is provided with the bonnet, first airtight and watertight padding is sheathed on the flashboard
On valve rod and it is arranged in the first airtight and watertight padding mounting hole, and close to first airtight and watertight padding of the valve-rod cavity side
Size be more than the size of first airtight and watertight padding away from the valve-rod cavity side, along the described first sealing on the valve body
The edge of filler is provided with interior pressure cap mounting hole, and the interior pressure cap is arranged in the interior pressure cap mounting hole.
8. low-temperature brake valve according to claim 7, it is characterised in that the outer surface of first airtight and watertight padding is step
Type.
9. low-temperature brake valve according to claim 7, it is characterised in that the low-temperature brake valve also includes：Second airtight and watertight padding
With outer pressure cap, the second airtight and watertight padding mounting hole is provided with the top of the bonnet, second airtight and watertight padding is sheathed on the lock
On plate upper valve rod and it is arranged in the second airtight and watertight padding mounting hole, along the edge of second airtight and watertight padding on the valve body
Outer pressure cap mounting hole is provided with, the outer pressure cap is arranged in the outer pressure cap mounting hole.
10. low-temperature brake valve according to claim 9, it is characterised in that first airtight and watertight padding and second sealing
The material of filler is cold resistant rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710570.XA CN105697840B (en) | 2014-11-28 | 2014-11-28 | A kind of low-temperature brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410710570.XA CN105697840B (en) | 2014-11-28 | 2014-11-28 | A kind of low-temperature brake valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105697840A CN105697840A (en) | 2016-06-22 |
| CN105697840B true CN105697840B (en) | 2018-01-05 |
Family
ID=56231044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410710570.XA Active CN105697840B (en) | 2014-11-28 | 2014-11-28 | A kind of low-temperature brake valve |
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| CN (1) | CN105697840B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210336U (en) * | 1987-07-18 | 1988-08-10 | 王晓滨 | Frost-resistant valve for pressure meter |
| CN2502087Y (en) * | 2001-09-07 | 2002-07-24 | 郭建周 | Antifreezing anti-overflow liquid valve |
| RU2319881C1 (en) * | 2007-02-09 | 2008-03-20 | Петр Васильевич Малина | Valve |
| CN201354865Y (en) * | 2008-07-25 | 2009-12-02 | 王世雄 | Solar energy anti-frost valve |
| CN202001706U (en) * | 2011-03-21 | 2011-10-05 | 宁波华成阀门有限公司 | Solar anti-freezing electromagnetic valve |
| CN203948070U (en) * | 2013-11-04 | 2014-11-19 | 西安东新石油设备厂有限公司 | A kind of high-pressure natural gas well head remote measuring and controlling safety shut-off valve device of four functions |
-
2014
- 2014-11-28 CN CN201410710570.XA patent/CN105697840B/en active Active
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| CN105697840A (en) | 2016-06-22 |
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