CN203500596U - Hard-and-soft sealing structure of valve flap of spring type safety valve - Google Patents
Hard-and-soft sealing structure of valve flap of spring type safety valve Download PDFInfo
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- CN203500596U CN203500596U CN201320389288.7U CN201320389288U CN203500596U CN 203500596 U CN203500596 U CN 203500596U CN 201320389288 U CN201320389288 U CN 201320389288U CN 203500596 U CN203500596 U CN 203500596U
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Abstract
The utility model provides a hard-and-soft sealing structure of a valve flap of a spring type safety valve. The hard-and-soft sealing structure mainly comprises a valve seat, a guide valve sleeve, a back-flushing disk and a combination type valve flap, wherein the valve seat, the guide valve sleeve and the back-flushing disk are assembled in a safety valve body; the combination type valve flap is formed by connecting a valve flap inner shaft and a valve flap outer sleeve; a hard-alloy convex ring and a convex sealing washer, which are overlaid on and embedded into the bottom end surface of the combination type valve flap, form tight hard and soft sealing pair structures with the top end surface of the valve seat respectively. An air flow is blocked by virtue of the hard sealing structure, the flushing and erosion effects on the soft sealing structure can be reduced, and the obvious effects of improving the flushing resistance and gas erosion resistance of sealing pairs and improving the sealing leakage-proof performance are achieved. The hard-and-soft sealing structure of the valve flap of the spring type safety valve has the outstanding advantages of easiness in production, low manufacturing cost, high sealing leakage-proof performance, stability in operation and long service life, is free from vibration noise, and has a good application prospect in medium- and low-pressure spring type safety valve series products.
Description
Technical field
The utility model relates to safety valve; relate in particular to the hard soft pair of matter sealing configuration of a kind of Direct spring loaded safety valve flap; it can greatly strengthen the sealability of safety valve; to preventing Leakage Gas and then improving safety protection unfailing performance, have positive effect, be particularly suitable in, on the pressurized container of low gas medium and gas pipeline, install and use.
Background technique
Due to Direct spring loaded safety valve, there is the plurality of advantages such as structure is simple and direct, production is easy, low cost of manufacture, easy for installation, operation technique is ripe; for a long time, in traditional pressurized container and Gas pipeline system, always be a kind of safety features generally using.But we also find in being engaged in for a long time the production of Direct spring loaded safety valve, R&D process: in, the Direct spring loaded safety valve that moves under low-pressure gas medium operating mode mostly exists that vibrating noise is large, the short familiar lacunas of operating life.Trace it to its cause and be: in existing, low pressure Direct spring loaded safety valve also scientific and reasonable not to the utmost in design of Sealing Structure due to, its soft seal ring is easily subject to gas and is situated between and washes away erosion damage and gas leak phenomenon occurs in running.According to market survey, understand: in existing, the Sealing of low pressure Direct spring loaded safety valve product is mostly the seal ring that uses polytetrafluoroethylmaterial material to make, to be objective, only adopt teflin ring as soft sealing pair, on " seal pressure ", be in can not meeting completely, press, air tight condition under low-pressure gas medium operating mode.During this is existing just, the soft seal pair of low pressure Direct spring loaded safety valve is washed away by cavitation erosion easily to damage and affect the main cause in working life.This be also existing in, low pressure Direct spring loaded safety valve also requires further improvement and perfect place in design of Sealing Structure, the utility model wants to solve this problem exactly.
Model utility content
The purpose of this utility model is on the basis of existing technology, proposes a kind of hard soft pair of matter sealing configuration of Direct spring loaded safety valve flap with high sealed against leakage performance.It can greatly improve the ability of the anti-cavitation erosion of sealing pair resistance to erosion, to strengthen Direct spring loaded safety valve leak resistance, reduce vibrating noise and extend operating life have obvious effect.
The purpose of this utility model is achieved by the following technical solution:
The hard soft pair of matter sealing configuration of a kind of Direct spring loaded safety valve flap the utility model proposes, it comprises the valve seat being installed in Safety valve body, guiding valve pocket and the Disc holder being fitted in guiding valve pocket, it is characterized in that: in the bottom of Disc holder, be fitted with combined type flap, described combined type flap is by flap overcoat and be connected in axle in the flap of flap overcoat and form, in flap overcoat and flap, between axle, setting-in male seal packing ring and valve seat top end form soft sealing pair structure, in flap, axle bottom end pile-up welding hard alloy bulge loop and valve seat top end form hard sealing pair structure.
Structural feature of the present utility model is: at combined type flap bottom pile-up welding hard alloy bulge loop, setting-in male seal packing ring and valve seat top end form respectively firmly, the double sealing structure of soft seal pair, its double seal working principle is: when combined type flap moves down while closing Direct spring loaded safety valve, at cemented carbide bulge loop, contact with valve seat top end in the process that forms hard sealing pair, male seal packing ring also can be extruded to be out of shape and to be close to valve seat top end simultaneously and form soft sealing pair, the wash away corrosion function of barrier air to the formation of male seal packing ring effectively of hard sealing pair.This double sealing structure to improve Direct spring loaded safety valve sealability, prevent gas leak phenomenon, reduce to move vibrating noise and increase the service life have fairly obvious technique effect.
Furthermore, the utility model also has following technical characteristics:
In flap, axle upper end is provided with external thread rod, and in flap, the external thread rod of axle upper end and the screw of flap overcoat form screw connection structure.This structural design is convenient to the practical operation that combined type flap is assembled especially.
In flap overcoat and flap, the fitting surface of axle is provided with " O " shape seal ring.Its object is also in order further to improve sealability, also to have certain effect to preventing gas leak phenomenon.
In flap, the cemented carbide bulge loop of axle bottom end built-up welding is cobalt base alloy.Through reality, use and show: select cobalt base alloy material to form hard sealing pair and there is good using effect to improving sealability, be convenient to especially built-up welding operation.
The utility model compared with the existing technology tool has the following advantages:
The utility model initiated in, the combined type flap of low pressure Direct spring loaded safety valve bottom pile-up welding hard alloy bulge loop, setting-in male seal packing ring form the sealing configuration of hard, soft pair of matter sealing pair, it can utilize hard sealing barrier air and then extenuate the wash away corrosion function of air-flow to soft sealing, can greatly strengthen the anti-cavitation erosion ability of sealing pair resistance to erosion and then the stable sealability that improves.The utlity model has structure simple and direct, produce easily, fabricating cost is low, easy to install, sealed against leakage performance is high, security of operation is stablized the outstanding advantages such as shockproof noise and long working life.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model, and accompanying drawing also makes an abstract.
Fig. 2 is Fig. 1
ipartial enlarged drawing, while showing that safety valve in off position, by the cemented carbide bulge loop of combined type flap bottom end built-up welding, the male seal packing ring of setting-in and valve seat top end form the structural representation of hard, soft pair of matter sealing pair.
Fig. 3 is the structural representation (amplification) of combined type flap, is illustrated in the bottom end pile-up welding hard alloy bulge loop of combined type flap and the structural representation of setting-in male seal packing ring.
Description of symbols in accompanying drawing:
1 is suction tude interface, and 2 is valve seat, and 3 is Safety valve body, and 4 is guiding valve pocket, 5 is valve gap, and 6 is spring, and 7 is valve rod, and 8 is connecting bolt, 9 is Disc holder, and 10 is relief tube interface, and 11 is flap overcoat, 12 is axle in flap, and 13 is hard soft pair of matter sealing surface, and 14 is spot welding connection, 15 is external thread rod, and 16 is interior hexagonal auxiliary hole, and 17 is cemented carbide bulge loop, 18 is male seal packing ring, and 19 is " O " shape seal ring, and 20 is screw connection structure.
Embodiment
Below in conjunction with accompanying drawing, further describe embodiment of the present utility model:
The hard soft pair of matter sealing configuration of Direct spring loaded safety valve flap the utility model proposes, it is mainly by the valve seat 2 being installed in Safety valve body 3, guiding valve pocket 4, Disc holder 9, valve rod 7 and combined type flap form, on Safety valve body 3, with connecting bolt 8, fixedly mount valve gaps 5, in valve gap 5, be fitted with spring 6, described combined type flap is connected and composed as follows by axle in flap 12 and flap overcoat 11: after fitting surface setting-in male seal packing ring 18 and " O " shape seal ring 19 in flap overcoat 11 and flap between axle 12, to in the screw of the external thread rod of 12 upper ends of axle in flap 15 screw-in flap overcoat 11 upper ends, form screw connection structure 20, with hexagon wrench, insert interior being tightened of interior hexagonal auxiliary hole 16 of axle 12 bottom end settings in flap, also can carry out again in flap overcoat 11 and the upper end of axle in flap 12 electric welding formation spot welding and be connected 14 structures.In flap, the basic demand of axle 12 bottom end built-up welding cobalt base hard alloy bulge loops 17 is: in flap, the position of axle 12 bottom end built-up welding cobalt base hard alloy bulge loops 17 is male seal packing ring 18 inner sides that are positioned at setting-in, and the height of built-up welding cobalt base hard alloy bulge loop 17 should be lower than the height of projection of the male seal packing ring 18 of institute's setting-in.It is performed such work: according to pressure of gas line network container operation rules, regulate after the emptying pressure of pressure release of setting safety valve, again the suction tude interface 1 of the Direct spring loaded safety valve the utility model proposes is fixedly connected with and is installed on gas pipeline or pressurized container, can the compressed gas in gas pipeline or pressurized container be imported in valve seat 2 and make gas pressure act on combined type flap bottom end.Gas pipeline or pressure vessel and equipment carry out in normal running job process under rated pressure gas Jie operating mode, and combined type flap is by state in the closed position under the gas pressure acting in conjunction in spring 6 and importing valve seat 2.At this moment, the cobalt base hard alloy bulge loop 17 of axle 12 bottom end institutes built-up welding forms hard sealing pair structures with valve seat 2 top end close contact states in flap, and male seal packing ring 18 is also extruded distortion simultaneously and is close to valve seat 2 top ends and forms soft sealing pair structure.That is to say, the cobalt base hard alloy bulge loop 17 of combined type flap bottom end, male seal packing ring 18 can form hard soft pair of tight matter sealing surface 13 of two roads with the top end of valve seat 2, can greatly strengthen the sealability of Direct spring loaded safety valve.Air pressure in gas pipeline or pressurized container is increased to while reaching the emptying pressure of pressure release that Direct spring loaded safety valve sets; combined type flap by under the promotion of gas pressure, overcome spring 6 active force and on move and promote Disc holder 9 and open fast safety valve; can carry out pressure release by relief tube interface 10 efflux gas, so far can realize the goal of the invention of equipment being carried out to safety protection.
Claims (4)
1. the hard soft pair of matter sealing configuration of a Direct spring loaded safety valve flap, it comprises the valve seat (2) being installed in Safety valve body (3), guiding valve pocket (4) and be fitted to the interior Disc holder (9) of guiding valve pocket (4), it is characterized in that: the bottom at Disc holder (9) is fitted with combined type flap, described combined type flap is by flap overcoat (11) and be connected in axle (12) in the flap of flap overcoat (11) and form, in flap overcoat (11) and flap, between axle (12), setting-in male seal packing ring (18) forms soft sealing pair structure with valve seat (2) top end, axle in flap (12) bottom end pile-up welding hard alloy bulge loop (17) forms hard sealing pair structure with valve seat (2) top end.
2. the hard soft pair of matter sealing configuration of Direct spring loaded safety valve flap according to claim 1, it is characterized in that: axle in flap (12) upper end is provided with external thread rod (15), in flap, the external thread rod (15) of axle (12) upper end and the screw of flap overcoat (11) form screw connection structure (20).
3. the hard soft pair of matter sealing configuration of Direct spring loaded safety valve flap according to claim 1 and 2, is characterized in that: in flap overcoat (11) and flap, the fitting surface of axle (12) is provided with " O " shape seal ring (19).
4. the hard soft pair of matter sealing configuration of Direct spring loaded safety valve flap according to claim 1 and 2, is characterized in that: the cemented carbide bulge loop (17) of axle in flap (12) bottom end built-up welding is cobalt base alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320389288.7U CN203500596U (en) | 2013-07-02 | 2013-07-02 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320389288.7U CN203500596U (en) | 2013-07-02 | 2013-07-02 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203500596U true CN203500596U (en) | 2014-03-26 |
Family
ID=50331576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320389288.7U Expired - Lifetime CN203500596U (en) | 2013-07-02 | 2013-07-02 | Hard-and-soft sealing structure of valve flap of spring type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203500596U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
| CN104315209A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Double-discharge safety valve |
| CN104315211A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Variable-throat-diameter safety valve |
| CN104315210A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Variable-throat-diameter safety valve |
| CN104653830A (en) * | 2015-02-10 | 2015-05-27 | 芜湖恒威车辆装备科技有限公司 | Stop valve and water pump |
-
2013
- 2013-07-02 CN CN201320389288.7U patent/CN203500596U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180033A (en) * | 2014-08-01 | 2014-12-03 | 浙江恒华阀门有限公司 | Piston balanced type pressure releasing valve |
| CN104315209A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Double-discharge safety valve |
| CN104315211A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Variable-throat-diameter safety valve |
| CN104315210A (en) * | 2014-09-30 | 2015-01-28 | 中国石油天然气股份有限公司 | Variable-throat-diameter safety valve |
| CN104315211B (en) * | 2014-09-30 | 2017-09-01 | 中国石油天然气股份有限公司 | The safety valve in variable larynx footpath |
| CN104653830A (en) * | 2015-02-10 | 2015-05-27 | 芜湖恒威车辆装备科技有限公司 | Stop valve and water pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SICHUAN CHANGYI OIL-GAS GATHERING TRANSPORTAION EQ Free format text: FORMER NAME: LESHAN CHANGYI VALVE MANUFACTURING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 614000 Leshan City, Central District, Sichuan Le Lok Road, No. 16 Patentee after: SICHUAN CHANGYI OIL-GAS GATHERING TRANSPORTATION EQUIPMENT CO.,LTD. Address before: 614000 Leshan City, Central District, Sichuan Le Lok Road, No. 16 Patentee before: LESHAN CHANGYI VALVE MANUFACTURING Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |