CN105889534B - Compression type is anti-directly to wash away relief valve valve base sealing structure - Google Patents
Compression type is anti-directly to wash away relief valve valve base sealing structure Download PDFInfo
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- CN105889534B CN105889534B CN201410817376.1A CN201410817376A CN105889534B CN 105889534 B CN105889534 B CN 105889534B CN 201410817376 A CN201410817376 A CN 201410817376A CN 105889534 B CN105889534 B CN 105889534B
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Abstract
Prevent directly washing away relief valve valve base sealing structure the invention discloses a kind of compression type, the sealing structure mode for adding the piston body of special construction by using valve seat part sealing structure is made of special valve seat support ring+valve seat+non-fastening type compression type valve seat pressure ring, while realizing that valve seat reliably seals, pressure release high-speed Medium stream is prevented directly to wash away valve seat, it solves the problems, such as setting pressure spot overswing, substantially prolongs the service life of valve.
Description
Technical field
The present invention relates to axial-flow type valve valve base sealing structures more particularly to a kind of compression type to prevent directly washing away relief valve valve
Seat sealing structure.
Background technique
In the operational process of various long-distance transport pipes, due to unexpected termination of pumping or closing valve causes water attack to generate, and line pressure is anxious
Play rises, and how to reduce the pressure in pipeline, prevents booster, so that the pressure medium in pipeline is in safety value or less is one
A considerable project.Has the surge reliever of shaft flow structure since with fast response time, setting accuracy is high, releases
The features such as measuring big and sealed reliable, therefore destroy in protection water attack and favored by engineering design.The type surge reliever
Valve seat generally uses soft seal mode to realize.In the surge reliever Seal Design of conventional shaft flow structure, valve base sealing
It is general that there are two types of modes: one is by seat design at the valve seat support ring+valve seat similar with ball seat+valve seat pressure ring+spiral shell
Bolt connection fastening structure, using the structure type of conical surface seal, seat material generally according to pressure size PTFE, PPL,
It is selected in the materials such as NYLON；One is in such a way that sealing is realized in O-ring radial seal.Two kinds of sealing structures are one
Each have their own advantage under fixed condition, but disadvantage is also quite obvious:
1, the sealing structure that+valve seat pressure ring+is bolted fastening using valve seat support ring+valve seat select plastic material as
Valve base seal, manufacturing and positioning errors and plastic material itself have to than press it is big due to, often by seat design
It is wider, with meet when relief valve is in close state, valve seat can excellent sealing, in this way, problem just come out: for
Guarantee valve seat bears that sealing surface of seat design is wider than pressure in allowable than forcing down, and during sealing, it is close to be used for valve seat
Ratio of the power of envelope in the axial total stress of piston body increases, therefore the power will affect the setting pressure precision of valve；It is any
When high speed pressure of the valve seat when undergoing pressure release acts on, it is impossible to be that once and for all, there are certain service life for valve seat, when need
When replacing valve seat, since the valve seat of replacement and original-pack valve seat are there are the inconsistency of structure size and fit on, necessarily lead
The valve seat of replacement and valve seat before is caused to form the power sealed inconsistent, this is by the setting pressure for influencing valve of continuity
Biggish drift will occur for the setting pressure spot of precision, i.e. relief valve.
2, using the valve seat construction of O-ring radial seal due to using radial O-ring and the piston body being arranged on valve seat
Outer circle cooperation realize sealing, in original state, the sealing structure sealing performance is excellent, after replacement o circle, since valve seat is
It being arranged radially, the mechanical relationship that setting pressure spot is influenced after replacement does not change, therefore not will lead to the drift of pressure release point,
This is its advantage place.But the shortcomings that this kind of structure is also quite obvious: valve seat needs radial arrangement, while requiring itself and work
> 1 time sealing is realized in cock body cooperation, is occurred in the relative motion of piston body and valve seat, between piston body and O-ring axial
Friction, O-ring easily haul out O-ring slot by piston body, and in order to avoid this kind of problem, it is O-shaped that complicated structural defence can be set
Circle does not drop out, but fatal problem is: repeatedly opening and closing and is subjected to close on the piston body that big flow liquid medium washes away in experience
Wire drawing will also occur under medium souring and corrode (surface forms a rule filiform groove) for cover, when piston body is closed,
The filiform groove under the conditions of fricting movement as countless the edge of a knife impact and scratch valve seat O-ring, small wire drawing groove pair
The influence of sealing will not be very big, because valve seat O-ring elastic deformation is very big, the deformation tension of its own is enough to resist because small
Influence of the scratch bring to sealing；But when in face of big highly dense wire drawing, leakage is unavoidable.
3, the either valve seat of that structure, all by experience release surge pressure when high-speed liquid stream erosion damage, contracting
It is excessive to generate pressure release point drift that the sealing life of short valve seat, influence valve seat need sealing force.
Summary of the invention
It is an object of the present invention to which it is anti-direct to provide a kind of compression type for the shortcoming in above-mentioned background technique
Wash away seal valve seat structure, it is therefore prevented that high flow rate releases medium to the direct erosion damage of valve seat, reduces valve seat to the pressure that sets up an office
The influence in force, pressure release point drift amount is big after solving the problems, such as the short valve seat with replacement of longer seat life, substantially prolongs valve
Service life simplifies practical operation.
A kind of compression type is anti-directly to wash away relief valve valve base sealing structure, it is characterized in that: by valve body, valve seat support ring, valve
Seat, valve seat pressure ring, piston body, venturi section and spring composition；Valve seat support ring is placed in valve body, and triangle is placed in front end setting
The seal groove of shape valve seat, in seal groove to centerline direction side, setting interference boss, interference boss lower part setting one supports oblique
Valve seat pressure ring is arranged in the front end of valve seat support ring and valve body cooperation in face, and stepped cross, valve seat support is arranged in valve seat pressure ring section
Circle rear end and venturi section cooperate to realize axial compression valve seat support ring, and when piston body contacts valve seat realization sealing, valve seat is produced
Raw slight deformation simultaneously forms seal pressure.
The invention mainly comprises: 1 valve body, 2 venturi sections, 3 valve seat support rings, 3-1 seal groove, 3-2 interfere boss, 3-3
Supporting oblique surface, 4 valve seats, 5 valve seat pressure rings, 6 piston bodies, 6-1 protect groove, the 6-2 piston body head conical surface, 7 springs, 8 bushings, 9
Bushing lid.
Effect of the invention is that:
1, using valve seat support ring+valve seat+non-fastening type compression type valve seat pressure ring sealing structure, valve base sealing, letter are realized
Valve seat assembly program is changed, so that installation and removal valve seat is easier；
2, the triangle soft seal ring structure small using contact area, and rubber material is used, it realizes valve seat and is occupying
Low seal pressure zero leakage sealing is realized under the conditions of lower active force, is reduced sealing force and is being determined to set pressure spot overall balance power
Ratio in relationship, it is therefore prevented that the excessive drift of setting pressure spot sets pressure point drift caused by solving because of replacement valve seat
The problem of amount of moving past；
3, it by the way that special interference boss is arranged on one side close to runner center line in valve seat support ring, corresponds on the piston body
Position setting protection groove structure, disturbs pressure release high-speed Medium and makes its flow direction around valve seat, it is therefore prevented that pressure release high speed
Medium flow field directly washes away valve seat, extends the service life of valve.
Detailed description of the invention
Fig. 1: compression type is anti-directly to wash away relief valve soft sealing valve seat structure chart
Fig. 2: seal valve seat schematic enlarged-scale view
In figure: 1 valve body, 2 venturi sections, 3 valve seat support rings, 3-1 seal groove, 3-2 interfere boss, 3-3 supporting oblique surface, 4
Valve seat, 5 valve seat pressure rings, 6 piston bodies, 6-1 protect groove, the 6-2 piston body head conical surface, 7 springs, 8 bushings, 9 bushing lids.
Specific embodiment
With reference to Fig. 1, Fig. 2: the present invention realizes that the specific embodiment of sealing is: valve seat support ring 3 is placed in valve body 1,
The seal groove 3-1 of holding triangular valve seat 4 is arranged in front end, and seal groove 3-1 shape and delta-ring are almost the same, are sealing
Slot 3-1 interferes boss 3-2 to centerline direction side, setting, to be allowed to interfere high-speed Medium stream and be allowed to turn to prevent height
Fast medium directly washes away valve seat 4；Interfere the lower part boss 3-2 that one supporting oblique surface 3-3 is set, supporting oblique surface 3-3 and piston body 6 are oblique
Face angle degree is consistent, and effect is to bear normal pressure when piston body 6 is closed when piston body 6 is closed, and is realizing to piston body 6
While limit, plays the role of part and be lowered into sealing secondary stress；It is set in the front end that valve seat support ring 3 cooperates with valve body 1
Valve seat pressure ring 5 is set, stepped cross is arranged in 5 section of valve seat pressure ring, and effect is to prevent valve seat 4 from falling off after being adjacent to valve seat 4, is kept away simultaneously
Exempt to contact with piston body 6；3 rear end of valve seat support ring and venturi section 2 cooperate to realize axial compression valve seat support ring 3；Piston
Body head conical surface 6-2 and the 3 same angle of supporting oblique surface 3-3 of valve seat support ring, on 6 upper piston body 6 of piston body and valve seat support ring 3
The position of boss 3-2 cooperation, setting protection groove 6-1 are interfered, the effect of protection groove 6-1 is to prevent interference boss 3-2 straight
It connects and is contacted with piston body 6, avoid its influence to sealing.
When line pressure is lower than relief valve setting pressure, piston body 6 and valve seat 4 are in and close fit-state, piston body 6
After piston body 6 power (for nitrogen surge reliever, the power is nitrogen pressure, for pilot-operated type surge reliever, the power
It is the medium active force for being introduced into valve chamber) under the action of, most of active force acts on supporting oblique surface 3-3, and small part power makes
Valve seat 4 occurs miniature deformation and generates seal pressure formation sealing.
With reference to Fig. 1, Fig. 2: the present invention realizes that the specific embodiment of the direct erosion damage valve seat of anti-medium is: according to above
The valve seat construction, after line pressure is more than relief valve setting pressure, piston body 6 is in close state equilibrium relation by broken
Bad, piston body 6 will withdraw valve seat 4, and the high-speed Medium stream that water attack generates will be sprayed by the gap between piston body 6 and valve seat 4
Out and be gradually increased flow, interfere the presence of boss 3-2, disturb high-speed Medium stream, make high-speed Medium stream direction change and around
Valve seat 4 is crossed, so that valve seat 4 be made to avoid the purpose for being played protection valve seat 4 by the direct erosion damage of high-speed Medium stream, is extended
The service life of valve seat 4.
With reference to Fig. 1, Fig. 2: the present invention realizes that the specific embodiment for preventing setting pressure spot overswing is: according to aforementioned
Valve seat construction, valve seat 4 are set as the triangular structure that the back side is big, end is small, when piston body 6, which contacts valve seat 4, realizes sealing, valve
Seat 4 generates slight deformations and simultaneously forms seal pressure, and due to 4 contact area very little of valve seat, required sealing force also very little is produced
The power of raw sealing is reduced in the ratio in setting pressure spot overall balance mechanical relationship that determines, 4 pairs of setting pressure of the structure valve seat
Influence also decrease, therefore, under the conditions of other conditions are immovable, which can be effectively reduced setting
The drift value of pressure spot.
Piston body 6, which is required to, before sealing due to the piston body 6 with valve seat 4 is close to valve seat support ring 3, valve seat 4 seals
When deformation quantity can be obtained effective control, after replacing valve seat 4, the valve seat 4 of replacement setting pressure spot drift value is influenced it is little, because
This present invention can solve the problems, such as to set pressure spot overswing caused by because of replacement valve seat 4.
Spirit and principle according to the present invention can also make many variations and modifications, be only described in above example
The present invention illustrates the invention thought of the structure, the one of of principle and embodiment, and the content of the present specification should not become pair
A kind of limitation of the invention.For those skilled in the art, do not changing basic functional principle and design of the invention
In the case of a variety of variations and modifications for making be regarded as protection scope of the present invention.
Claims (3)
1. a kind of compression type is anti-directly to wash away relief valve valve base sealing structure, it is characterized in that: including valve body, valve seat support ring, valve
Seat, valve seat pressure ring, piston body, venturi section and spring；Valve seat support ring is placed in valve body, and holding triangular valve is arranged in front end
The seal groove of seat, in seal groove to centerline direction side, setting interference boss interferes boss lower part that a supporting oblique surface is arranged,
Valve seat pressure ring is set in the front end of valve seat support ring and valve body cooperation, stepped cross, valve seat support ring is arranged in valve seat pressure ring section
Rear end and venturi section cooperate to realize axial compression valve seat support ring, and piston body contacts valve seat and realizes that valve seat generates when sealing
Slight deformation simultaneously forms seal pressure.
2. compression type is anti-according to claim 1 directly washes away relief valve valve base sealing structure, it is characterized in that: valve seat is set as
The triangular structure that the back side is big, end is small, and use rubber material.
3. compression type is anti-according to claim 1 directly washes away relief valve valve base sealing structure, it is characterized in that: piston body head
The conical surface and the same angle of valve seat support ring supporting oblique surface, on the piston body in piston body and valve seat support ring interference boss cooperation position
It sets, setting protection groove prevents interference boss from directly contacting with piston body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817376.1A CN105889534B (en) | 2014-12-24 | 2014-12-24 | Compression type is anti-directly to wash away relief valve valve base sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817376.1A CN105889534B (en) | 2014-12-24 | 2014-12-24 | Compression type is anti-directly to wash away relief valve valve base sealing structure |
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| Publication Number | Publication Date |
|---|---|
| CN105889534A CN105889534A (en) | 2016-08-24 |
| CN105889534B true CN105889534B (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410817376.1A Active CN105889534B (en) | 2014-12-24 | 2014-12-24 | Compression type is anti-directly to wash away relief valve valve base sealing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113757399A (en) * | 2021-09-10 | 2021-12-07 | 特瑞斯能源装备股份有限公司 | Sealing structure for valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3515989A1 (en) * | 1984-05-21 | 1985-11-21 | Alföldi Köolajipari Gépgyár, Orosháza | VALVE WITH AXIAL FLOW |
| CN201496581U (en) * | 2009-09-10 | 2010-06-02 | 江南阀门有限公司 | Dual seal structure of piston type axial flow valve |
| CN102650342A (en) * | 2011-02-24 | 2012-08-29 | 自贡新地佩尔阀门有限公司 | Piston type compound sealing axial flow type check valve |
| CN203500549U (en) * | 2013-10-22 | 2014-03-26 | 方正阀门集团有限公司 | Rubber sealing ball valve |
| CN203532798U (en) * | 2013-11-01 | 2014-04-09 | 上海大通自控设备有限公司 | Axial-flow high-pressure adjusting valve |
-
2014
- 2014-12-24 CN CN201410817376.1A patent/CN105889534B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3515989A1 (en) * | 1984-05-21 | 1985-11-21 | Alföldi Köolajipari Gépgyár, Orosháza | VALVE WITH AXIAL FLOW |
| CN201496581U (en) * | 2009-09-10 | 2010-06-02 | 江南阀门有限公司 | Dual seal structure of piston type axial flow valve |
| CN102650342A (en) * | 2011-02-24 | 2012-08-29 | 自贡新地佩尔阀门有限公司 | Piston type compound sealing axial flow type check valve |
| CN203500549U (en) * | 2013-10-22 | 2014-03-26 | 方正阀门集团有限公司 | Rubber sealing ball valve |
| CN203532798U (en) * | 2013-11-01 | 2014-04-09 | 上海大通自控设备有限公司 | Axial-flow high-pressure adjusting valve |
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| Publication number | Publication date |
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| CN105889534A (en) | 2016-08-24 |
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