CN209180391U - High sealing liquefied gas shut-off valve - Google Patents
High sealing liquefied gas shut-off valve Download PDFInfo
- Publication number
- CN209180391U CN209180391U CN201820684792.2U CN201820684792U CN209180391U CN 209180391 U CN209180391 U CN 209180391U CN 201820684792 U CN201820684792 U CN 201820684792U CN 209180391 U CN209180391 U CN 209180391U
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- CN
- China
- Prior art keywords
- valve
- nut
- seat
- flap
- deck
- 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.)
- Expired - Fee Related
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Abstract
A kind of high sealing liquefied gas shut-off valve, it is characterized in that including valve body, flap, valve rod, bonnet nut, valve deck, Packing seat, composite filling, gland, valve stem nut；Gasket seal, bolt, nut, O-ring seal, adjustment spring, bonnet nut, locking nut；Valve body is equipped with inlet and outlet, on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat to inlet and outlet, connect valve rod with the matched flap of valve seat, valve rod drives flap to open and close the opening and closing of corresponding valve on valve seat, and flap and sealing surface of seat use PTFE composite structure；Valve deck is equipped with above valve body, valve body valve deck is fixed by screw rod, nut, the position of the lower end package valve rod of valve deck is equipped with valve stem nut, valve stem nut is embedded in valve deck, and the top that valve stem nut matches the composite filling of annular with the screw thread on the outside of valve body is the O-ring seal covered on valve rod, adjustment spring and bonnet nut.
Description
Technical field
The utility model relates to a kind of shut-off valves, especially high sealing liquefied gas shut-off valve.
Background technique
It is least readily exactly to seal for the valve of liquefied gas in the media such as petroleum, chemical industry, chemical fertilizer, and highly dense sealing liquid
Change gas shut-off valve and is able to achieve good sealing.This product is suitable for petroleum, chemical industry, chemical fertilizer, pesticide, chemical fibre, papermaking, sugaring, food
Product, power station, etc. industrial departments and agricultural or even living facilities purification device pipeline control system, pipe-line system is opened
Close the special valve of control.It is best suited for the demanding soft seal operating condition of liquefied gas etc..The deficiency of traditional product is: tradition is cut
Only valve, intolerant to liquefied gas.It cannot be sealed well in liquefied gas.
Utility model content
The utility model aim is, for traditional shut-off valve, intolerant to liquefied gas.For cannot be good in the case of liquefied gas
Sealing, the utility model proposes a kind of high sealing liquefied gas shut-off valves, especially complete to being equipped at flap and valve rod two
Sealing structure.
The technical solution of the utility model is: a kind of high sealing liquefied gas shut-off valve, including valve body, flap, valve rod, valve
Lid, Packing seat, composite filling, gland, valve stem nut, gasket seal, bolt, nut, O-ring seal, adjustment spring,
Bonnet nut, locking nut；Valve body is equipped with inlet and outlet, imports and exports on an axis, the center of the enterprising outlet flow of valve body
Equipped with valve seat, valve rod is connect with the matched flap of valve seat, valve rod drives flap to open and close the opening and closing for corresponding to valve, flap on valve seat
PTFE composite structure is used with sealing surface of seat, ring-shaped P TFE gasket is pushed down equipped with circular pressing plate and is fixed on the table of flap
Face, the outer diameter of PTFE seal pad are slightly larger than the outer diameter of circular pressing plate, and the outer diameter of PTFE seal pad is also slightly larger than the inner ring diameter of valve seat；
Valve deck is equipped with above valve body, valve body, valve deck are fixed by screw rod, nut, and the position of the lower end package valve rod of valve deck is equipped with valve rod
Nut, valve stem nut are embedded in valve deck, and valve stem nut is matched with the screw thread on the outside of valve body；Position above valve deck upper valve stem nut is set
There are the composite filling and gland of Packing seat, annular, gland is to valve rod packing seal；Annular composite filling it is upper
Side is to cover O-ring seal, adjustment spring and bonnet nut on valve rod；Bonnet nut is tightened on the internal screw thread on valve deck top
On.For adjusting to the pressure of gland and composite filling, composite filling uses graphite and PTFE composite, can be with
Guarantee lubrication of the valve rod in composite filling and is slidingly sealed.
Gasket seal and bolt are for installing valve deck and valve body.Valve rod and the matched screw thread of valve stem nut are inverted structures,
When rotatable handle is installed in valve rod upper end, handle can make the up and down motion of valve rod and drive the movement of valve flap, to open and close valve
Door.
Flap and sealing surface of seat use PTFE composite structure: circular pressing plate pushes down ring-shaped P TFE gasket and is fixed on valve
The surface of valve, the outer diameter of PTFE seal pad are slightly larger than the outer diameter of circular pressing plate, and the outer diameter of PTFE seal pad is also slightly larger than valve seat
Inner ring diameter, so that flap PTFE seal pad outer rim and the inner ring of valve seat are compacted.Flap and sealing surface of seat, that is, valve seal
Face is all made of pile-up welding hard alloy, and accurate metalworking obtains again, to guarantee the precision of sealing surface and the hardness of material.
The utility model has the beneficial effects that the improved advantage of the utility model: adjustment spring combines dual packing seal
Structure guarantees the sealing relatively reliable in liquefied gas operating condition, reaches long service life.Sealing surface uses PTFE composite structure,
Guarantee the sealing performance under liquefied gas working condition.Using assembling structure under valve stem nut, whole operation space is saved, convenient for peace
Dress, operation are easy, and sealing effect is more preferable.Valve body sealing surface uses pile-up welding hard alloy, and wear-resistant and corrosion resistance is strong；It is applicable in
Range is wide.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
Specific embodiment
As shown, valve body, 2, nut, 3, elastomeric pad, 4, pressing plate, 5, PTFE seal pad, 6, flap, 7, divided ring,
8, PTFE seal pad, 9 bonnet nuts, 10 mark closely screw, 11 valve rods, 12 valve stem nuts, and 13 mark closely screw, 14 gasket seals,
15, valve deck, 16, bolt, 17, nut, 18, composite filling, 19, gland, 20, O-ring seal, 21 adjustment springs, 22 valves
Box nut, 23 locking nuts, 24, O-ring seal, 25 handwheels, 26 nameplates, 27 nuts, 28 gaskets.
High sealing liquefied gas shut-off valve, including valve body, flap, valve rod, bonnet nut, valve deck, Packing seat, composite filling,
Eyelet bolt, nut, gland, gland, valve stem nut, handwheel；Mark closely screw, gasket seal, bolt, nut is O-shaped
Sealing ring, adjustment spring, bonnet nut, locking nut；Valve body is equipped with inlet and outlet, imports and exports on an axis, on valve body
The center for importing and exporting runner is equipped with valve seat, connect valve rod with valve seat matched flap, and valve rod drive flap opens and closes pair on valve seat
The opening and closing of valve is answered, flap and sealing surface of seat use PTFE composite structure.Valve deck is equipped with above valve body, valve body valve deck passes through spiral shell
Stem nut is fixed, and the position of the lower end package valve rod of valve deck is equipped with valve stem nut, and valve stem nut is embedded in valve deck, valve stem nut and valve
The screw thread matching of external side；Position above valve deck upper valve stem nut is equipped with the gland of Packing seat, annular composite filling
To valve rod packing seal.The top of the composite filling of annular is the O-ring seal covered on valve rod, adjustment spring and valve deck spiral shell
It is female；Bonnet nut is tightened on the internal screw thread on valve deck top, for adjusting the pressure to gland and composite filling, group
Close filler use graphite and PTFE composite, it is ensured that lubrication of the valve rod in composite filling be slidingly sealed.
Gasket seal, valve deck, bolt is for installing valve deck and valve body.Valve rod and the matched screw thread of valve stem nut are upside-down mounting knots
Structure, when rotatable handle is installed in valve rod upper end, handle can make the up and down motion of valve rod and drive the movement of valve flap, to open and close
Valve.Rotation hand wheel band ovable valve stem, is promoted or decline flap is in the position of valve seat, and valve flow channel thus may be implemented
On or off, to controlled whether the output to liquefied gas.
Adjustment spring combines dual packing seal structure, and sealing surface uses PTFE composite structure.Using being filled under valve stem nut
Structure, valve body sealing surface use pile-up welding hard alloy.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, all practical at this
Made any modifications, equivalent replacements, and improvements etc. within novel spirit and principle, the guarantor to be included in the utility model
Within the scope of shield.
Claims (2)
1. a kind of high sealing liquefied gas shut-off valve, characterized in that filled out including valve body, flap, valve rod, valve deck, Packing seat, combination
Material, gland, valve stem nut, gasket seal, bolt, nut, O-ring seal, adjustment spring, bonnet nut, locking screw
It is female；Valve body is equipped with inlet and outlet, and on an axis, the center of the enterprising outlet flow of valve body is equipped with valve seat to inlet and outlet, with valve seat
Matched flap connects valve rod, and valve rod drives flap to open and close the opening and closing for corresponding to valve on valve seat, and flap is adopted with sealing surface of seat
With PTFE composite structure, ring-shaped P TFE gasket is pushed down equipped with circular pressing plate and is fixed on the surface of flap, PTFE seal pad
Outer diameter is slightly larger than the outer diameter of circular pressing plate, and the outer diameter of PTFE seal pad is also slightly larger than the inner ring diameter of valve seat；Valve is equipped with above valve body
Lid, valve body, valve deck are fixed by screw rod, nut, and the position of the lower end package valve rod of valve deck is equipped with valve stem nut, and valve stem nut is embedding
Enter valve deck, valve stem nut is matched with the screw thread on the outside of valve body；Position above valve deck upper valve stem nut is equipped with Packing seat, annular
Composite filling and gland, gland is to valve rod packing seal；The top of the composite filling of annular is to cover on valve rod
O-ring seal, adjustment spring and bonnet nut；Bonnet nut is tightened on the internal screw thread on valve deck top.
2. high sealing liquefied gas shut-off valve according to claim 1, characterized in that gasket seal and bolt are for installing valve
Lid and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820684792.2U CN209180391U (en) | 2018-05-09 | 2018-05-09 | High sealing liquefied gas shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820684792.2U CN209180391U (en) | 2018-05-09 | 2018-05-09 | High sealing liquefied gas shut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209180391U true CN209180391U (en) | 2019-07-30 |
Family
ID=67357124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820684792.2U Expired - Fee Related CN209180391U (en) | 2018-05-09 | 2018-05-09 | High sealing liquefied gas shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209180391U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013120A (en) * | 2020-08-21 | 2020-12-01 | 肯卓自控工程(江苏)有限公司 | High-sealing gas stop valve |
-
2018
- 2018-05-09 CN CN201820684792.2U patent/CN209180391U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112013120A (en) * | 2020-08-21 | 2020-12-01 | 肯卓自控工程(江苏)有限公司 | High-sealing gas stop 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 |
Granted publication date: 20190730 Termination date: 20210509 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |