CN206072424U - A kind of three-position three-way valve - Google Patents
A kind of three-position three-way valve Download PDFInfo
- Publication number
- CN206072424U CN206072424U CN201620903081.0U CN201620903081U CN206072424U CN 206072424 U CN206072424 U CN 206072424U CN 201620903081 U CN201620903081 U CN 201620903081U CN 206072424 U CN206072424 U CN 206072424U
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- China
- Prior art keywords
- valve
- piston
- outlet
- valve body
- valve rod
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of three-position three-way valve, including valve body, limit base, valve rod and piston, the valve body is cylinder valve, outlet a, outlet b and import are provided with along the centerline direction of valve body, import is between outlet a and outlet b, sealing station is provided with valve body, bottom is provided with limit base, and top is provided with valve gap；The bottom of valve rod is arranged in valve body through valve gap, and the bottom of valve rod is provided with piston, and screw thread is provided with the middle part of valve rod, and in sealing station, sealing station coordinates installation to form sealing surface with piston for the import of valve body；Valve rod is coordinated by screw thread/swivel nut with valve gap to be installed, and sealing device is provided between valve gap and valve rod.Technical purpose of the present utility model is to provide one kind to take up room the simpler three-position three-way valve of little, low production cost, structure, and this three-position three-way valve optimizes overall structure, operates easier, and structure is more reasonable.
Description
Technical field
This utility model is related to valve field, particularly a kind of three-position three-way valve.
Background technology
LNG skid pipeline safe venting systems are the vitals for ensureing LNG skids pipe-line system safety, it is to avoid LNG is prized
There is over-pressed accident in dress system.
Traditional LNG skid pipeline safe venting systems are made up of multiple three-way valve, stop valve and relief valve so that tradition
LNG skid pipeline safe venting systems complex structure, assemble it is loaded down with trivial details, production when, LNG skid pipeline safe venting systems
All parts between weld seam quantity it is many, complex procedures, and it is big to take up room.
Utility model content
For above-mentioned deficiency, technical purpose of the present utility model be provide one kind take up room it is little, produce into
The simpler three-position three-way valve of this low, structure, this three-position three-way valve optimize overall structure, and operation is easier, and structure is more
Adduction is managed.
This utility model is achieved through the following technical solutions：
A kind of three-position three-way valve, including：Valve body, limit base, valve rod and piston, the valve body are cylinder valve, along valve
The centerline direction of body is provided with outlet a, outlet b and import, and import is provided with sealing between outlet a and outlet b in valve body
Platform, bottom are provided with limit base, and top is provided with valve gap；The bottom of valve rod is arranged in valve body through valve gap, the bottom of valve rod
Piston is installed, screw thread in the middle part of valve rod, is provided with, in sealing station, sealing station is coordinated with piston installs formation for the import of valve body
Sealing surface；Valve rod is coordinated by screw thread/swivel nut with valve gap to be installed, and sealing device is provided between valve gap and valve rod.
In above-mentioned technical proposal, by an import and two outlets are provided with cylinder valve, and in valve rod
Bottom is provided with piston, by controlling the degree that valve rod gos deep in valve body so that the position change of piston, so as to the shape of control valve
State, can cause fully closed valve, valve a outlets and inlet communication or b outlets and inlet communication, so as to realize the control to medium,
This compact conformation, the little, structure that takes up room are simpler, and the quantity of weld seam greatly reduces, so that production cost is lower, and
And only need to be by controlling same valve rod come control valve so that the operation of valve is easier, can also avoid opening by mistake or close by mistake.
Further, the outlet a is provided with relief valve by discharge connection, and outlet b is provided with three by discharge connection
Siphunculus, relief valve are connected with tee T.
In above-mentioned technical proposal, relief valve is provided with by discharge connection in outlet a, medium is entered from import, from outlet a
Outflow is the normal operating conditions of valve, when pressure medium of the relief valve in tubing is excessive, can in time will be excessive
Pressure venting, so as to protect pipe-line system；By being provided with tee T in outlet b so that the medium in pipeline is from can be from going out
Mouth b emptying, can be pipeline pressure release, and also so that the integrated level of valve is higher, structure is compacter.
Further, the top and bottom of the piston is respectively equipped with circular shoulder, and top land is circular convex with bottom
The face of cylinder of shoulder is provided with groove, and sealing ring is provided with groove, and sealing ring coordinates installation to form sealing surface with piston；Piston top
The circular shoulder in portion is provided with draw-in groove, and draw-in groove section is U-shaped；The bottom of valve rod is provided with boss, and the boss of stem bottom is solid with draw-in groove
Dingan County fills.
In above-mentioned technical proposal, circular shoulder is respectively equipped with by the top and bottom in piston, it is convex by circle respectively
Sealing station in shoulder and valve body coordinates to be installed so that beating, opening/closing outlet a and outlet b are quicker, operate valve also more
It is easy；By being provided with sealing ring in groove so that more preferably, the circular shoulder of top land is provided with card to the sealing effectiveness of valve
Groove, draw-in groove section are U-shaped so that the connection with valve rod installs more quick, relatively reliable.
Further, in the sealing station sealing surface length L=（5～7）H+d, h are the circular shoulder of piston base
Thickness, import internal diameters of the d for valve body, the length of piston are less than or equal to the length of sealing station sealing surface.
In above-mentioned technical proposal, by the length of sealing upper sealing surface is set to L=（5～7）H+d, and the length of piston
Less than or equal to the length of sealing station sealing surface so that the height that piston is opened is big, sealed reliable.
Further, the limit base is provided with gag lever post, and gag lever post is arranged in valve body, is pacified between limit base and valve body
Equipped with sealing ring.
In above-mentioned technical proposal, by gag lever post is provided with limit base so that in valve rod in moving process in valve, keep away
Exempt from valve rod movement excessively, limit base props up piston, so that outlet a is closed, outlet b is opened, and facilitates control valve
Aperture.
Further, the sealing device is V-type packing seal, and the V-type gland sealed material is PTFE.
In above-mentioned technical proposal, by sealing is set V-type packing seal so that the gap between filler and filler is less, close
Envelope is more reliable, and the material for sealing is PTFE so that filler cold tolerance is strong, and filler is less to the frictional force of valve rod.
Further, the valve rod upper portion side wall is provided with position striped.
In above-mentioned technical proposal, position striped is provided with by the side wall on valve rod top so that in open/close valves door
It is more prone to judge the position of piston, so as to the relatively reliable sealing of valve.
The beneficial effects of the utility model are:
1st, by an import and two outlets are provided with cylinder valve, and piston is provided with the bottom of valve rod,
By controlling the degree that valve rod gos deep in valve body so that the position change of piston, so as to the state of control valve, valve can be caused
Fully closed, valve a outlet and inlet communication or b outlets and inlet communication, so as to realize the control to medium, this compact conformation,
The little, structure that takes up room is simpler, and the quantity of weld seam greatly reduces, so that production cost is lower, and only need to be by control
Make same valve rod and carry out control valve so that the operation of valve is easier, can also avoid opening by mistake or close by mistake.
2nd, relief valve is provided with by discharge connection in outlet a, medium is entered from import, it is valve to flow out from outlet a
Normal operating conditions, when pressure medium of the relief valve in tubing is excessive, can in time by excessive pressure venting, so as to
Protection pipe-line system；By being provided with tee T in outlet b so that the medium in pipeline, from being vented from outlet b, can be pipe
Road pressure release, also so that the integrated level of valve is higher, structure is compacter.
3rd, circular shoulder is respectively equipped with by the top and bottom in piston, respectively by close in circular shoulder and valve body
Seal platform and coordinate installation so that opening/closing outlet a and outlet b are quicker beating, and operate valve also easier；By recessed
Sealing ring is provided with groove so that more preferably, the circular shoulder of top land is provided with draw-in groove to the sealing effectiveness of valve, and draw-in groove section is U
Type so that the connection with valve rod installs more quick, relatively reliable.
Description of the drawings
Fig. 1 is general structure schematic diagram of the present utility model；
Fig. 2 is the structural representation of piston；
Fig. 3 is the top view of piston.
Labelling in figure：1 is valve body, 2 is limit base, 3 is valve rod, 4 is sealing device, 5 is valve gap, 6 is relief valve, 7 are
Piston.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in detail.
Three-position three-way valve as shown in Figure 1, Figure 2 and Figure 3, including：Valve body 1, limit base 2, valve rod 3, sealing device 4, valve
Lid 5, relief valve 6 and piston 7, valve body 1 are cylinder valve, are provided with outlet a, outlet b along the centerline direction of valve body 1 and enter
Mouthful, import consequently facilitating the flow direction of medium is controlled by piston 7, is provided with sealing in valve body 1 between outlet a and outlet b
Platform, bottom are provided with limit base 2, and top is provided with valve gap 5；The bottom of valve rod 3 is arranged in valve body 1 through valve gap 5, valve rod 3
Bottom piston 7 is installed, the middle part of valve rod 3 is provided with screw thread, and the top of valve rod 3 is provided with handle, and the import of valve body 1 is located at sealing
On platform, sealing station coordinates installation to form sealing surface with piston 7；Valve rod 3 is coordinated by screw thread/swivel nut with valve gap 5 to be installed, valve rod 3
Preferentially coordinated from swivel nut with valve gap 5 and installed, valve gap（5）With valve rod（3）Between be provided with sealing device（4）.
Outlet a is provided with relief valve 6 by discharge connection, and outlet b is provided with tee T, relief valve 6 by discharge connection
Connect with tee T；The top and bottom of the piston 7 is respectively equipped with circular shoulder, the circular shoulder of 7 top and bottom of piston
The face of cylinder be provided with groove, sealing ring is installed in groove, sealing ring coordinates installation to form sealing surface with piston 7；Piston 7 is pushed up
The circular shoulder in portion is provided with draw-in groove, and draw-in groove section is U-shaped；The bottom of valve rod 3 is provided with boss, the boss and draw-in groove of 3 bottom of valve rod
Fixed installation；Limit base 2 is provided with gag lever post, and gag lever post is cylinder, the centrage of gag lever post and the centrage weight of valve body 1
Close, gag lever post is arranged in valve body 1, is provided with sealing ring between limit base 2 and valve body 1；Length L=of sealing surface in sealing station
（5～7）H+d, it is usually preferred to the thickness of L=6h+d, h for the circular shoulder of 7 bottom of piston, import internal diameters of the d for valve body 1, piston
7 length is less than 2mm than the length of sealing station sealing surface, so that the sealing of valve is relatively reliable, and in Open valve
When, valve has larger Lift so that the flow of valve is larger；
The sealing device 4 be V-type packing seal, the V-type gland sealed material be PTFE, pipe-line system conveying
LNG, LNG are cryogenic media, and sealed material causes filler relatively reliable for PTFE, and use time is longer；3 upper portion side wall of valve rod sets
There is position striped, the position striped on valve rod 3 can be formed by marking, the position of the position striped on valve rod 3 is will just to go out
When mouth a is closed with outlet b, position striped is absorbed in the position of stuffing nut half.
An import and two outlets are provided with cylinder valve 1, and piston 7 are provided with the bottom of valve rod 3, pass through
The degree that control valve rod 3 gos deep in valve body 1 so that the position change of piston 3, so as to the state of control valve, can cause valve
Fully closed, valve a outlet and inlet communication or b outlets and inlet communication, so as to realize the control to medium, this compact conformation,
The little, structure that takes up room is simpler, and the quantity of weld seam greatly reduces, so that production cost is lower, and only need to be by control
Make same valve rod and carry out control valve so that the operation of valve is easier, can also avoid opening by mistake or close by mistake.
Course of action of the present utility model is：
1st, rotate handle so that valve rod 3 is moved to the outside of valve body 1, when valve rod 3 moves to outermost end, valve gap inner chamber and valve
Thread contact on bar 3, valve rod 3 are moved to topmost, and valve inlet is connected with outlet a, and medium is entered from import, by outlet
A, relief valve 6 and tee T flow out；
2nd, rotate handle so that valve rod 3 is moved into valve body 1, when the position striped half on valve rod 3 is absorbed in filler spiral shell
Mother, piston 7 move to the position for making outlet a, outlet b and import cut-off, so as to close outlet a and outlet b simultaneously, now may be used
Valve is safeguarded；
3rd, rotate handle so that valve rod 3 is moved into valve body 1, and when the bottom of piston 7 props up limit base, piston 7 is moved to
Import is made to connect with outlet b, and the position with outlet a cut-offs, medium, now can be to pipeline pressure release from 2 outflow of outlet.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of three-position three-way valve, it is characterised in that include：Valve body（1）, limit base（2）, valve rod（3）And piston（7）, it is described
Valve body（1）For cylinder valve, along valve body（1）Centerline direction be provided with outlet a, outlet b and import, import is located at outlet a
Between outlet b, valve body（1）Sealing station is provided with inside, bottom is provided with limit base（2）, top is provided with valve gap（5）；Valve rod（3）
Bottom pass through valve gap（5）Installed in valve body（1）It is interior, valve rod（3）Bottom piston is installed（7）, valve rod（3）Middle part be provided with
Screw thread, valve body（1）Import in the sealing station, sealing station coordinates installation to form sealing surface with piston (7)；Valve rod（3）With valve
Lid（5）Coordinated by screw thread/swivel nut and installed, valve gap（5）With valve rod（3）Between be provided with sealing device（4）.
2. three-position three-way valve as claimed in claim 1, it is characterised in that the outlet a is provided with safety by discharge connection
Valve（6）, export b and tee T, relief valve be provided with by discharge connection（6）Connect with tee T.
3. three-position three-way valve as claimed in claim 2, it is characterised in that the piston（7）Top and bottom be respectively equipped with
Circular shoulder, piston（7）The face of cylinder of the circular shoulder of top and bottom is provided with groove, and sealing ring is provided with groove, close
Seal and piston（7）Installation is coordinated to form sealing surface；Piston（7）The circular shoulder at top is provided with draw-in groove, and draw-in groove section is U-shaped；
Valve rod（3）Bottom be provided with boss, valve rod（3）The boss of bottom is fixedly mounted with draw-in groove.
4. three-position three-way valve as claimed in claim 3, it is characterised in that length L=of sealing surface in the sealing station（5～7）
H+d, h are piston（7）The thickness of the circular shoulder of bottom, d are valve body（1）Import internal diameter, piston（7）Length be less than or wait
In the length of sealing station sealing surface.
5. three-position three-way valve as claimed in claim 3, it is characterised in that the limit base（2）It is provided with gag lever post, gag lever post
Installed in valve body（1）It is interior, limit base（2）With valve body（1）Between sealing ring is installed.
6. three-position three-way valve as claimed in claim 5, it is characterised in that the sealing device（4）For V-type packing seal, institute
V-type gland sealed material is stated for PTFE.
7. three-position three-way valve as claimed in claim 6, it is characterised in that the valve rod（3）Upper portion side wall is provided with position striped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903081.0U CN206072424U (en) | 2016-08-19 | 2016-08-19 | A kind of three-position three-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903081.0U CN206072424U (en) | 2016-08-19 | 2016-08-19 | A kind of three-position three-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206072424U true CN206072424U (en) | 2017-04-05 |
Family
ID=58430509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620903081.0U Expired - Fee Related CN206072424U (en) | 2016-08-19 | 2016-08-19 | A kind of three-position three-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206072424U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013727A (en) * | 2017-04-26 | 2017-08-04 | 上海百图低温阀门有限公司 | The automobile-used cryogenic insulated cylinder safety device control valves of LNG |
-
2016
- 2016-08-19 CN CN201620903081.0U patent/CN206072424U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013727A (en) * | 2017-04-26 | 2017-08-04 | 上海百图低温阀门有限公司 | The automobile-used cryogenic insulated cylinder safety device control valves of LNG |
| CN107013727B (en) * | 2017-04-26 | 2023-03-10 | 上海百图低温阀门有限公司 | LNG vehicle low-temperature heat-insulation gas cylinder safety device control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170405 Termination date: 20200819 |