CN108223858A - Valve sealing structure, valve and the low pressure valve using the sealing structure - Google Patents
Valve sealing structure, valve and the low pressure valve using the sealing structure Download PDFInfo
- Publication number
- CN108223858A CN108223858A CN201710750588.6A CN201710750588A CN108223858A CN 108223858 A CN108223858 A CN 108223858A CN 201710750588 A CN201710750588 A CN 201710750588A CN 108223858 A CN108223858 A CN 108223858A
- Authority
- CN
- China
- Prior art keywords
- valve
- sealing
- valve body
- spool
- sealing structure
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The present invention relates to a kind of valve sealing structures, provide a kind of valve sealing structure, valve and the low pressure valve using the sealing structure.Valve sealing structure includes valve body and spool, spool is equipped with rubber pad, and valve body is equipped with valve seat, and valve seat has the sealing mating surface for forming sealing pair with rubber pad, the outermost layer of the sealing mating surface is sprayed plastic coat, and the sprayed plastic coat is formed by the Teflon sprayed.The outermost layer that be used for and the rubber pad of valve seat form the sealing mating surface of sealing pair is sprayed plastic coat, the sprayed plastic coat is formed by the Teflon sprayed, since Teflon has good non-stick, therefore rubber can be avoided to be adhered in sealing mating surface and influence first Opening pressure, also, existing spool may be used in spool, is not required to by specially treated, replacement easy to repair, versatility are good.
Description
Technical field
The present invention relates to a kind of valve sealing structures.
Background technology
With hydraulic pressure, the development of pneumatics, the demand of valve products constantly expands, and the performance of valve, technology
It is required that it is also constantly improving.Check valve and safety valve are two kinds of valves generally used, generally comprise valve body, and valve body, which has, to be supplied
The valve chamber of spool activity setting, one end of the close one-way valve inlet of spool are equipped with sealing structure, and valve body is equipped with and spool pair
The valve seat answered, valve seat are equipped with the sealing structure of adaptation.During normal use, spool on valve seat, blocks single by spring top pressure
To valve inlet, after one-way valve inlet pressure increases to setting value, spring is compressed, and spool is moved backwards to one-way valve inlet, real
Existing one-way conduction.
Often is there is the problem of Opening pressure raising for the first time in valve currently on the market during experiment and use, particularly
For low pressure valve, the performance of product in use can not be effectively ensured and stablized, even jeopardized system safety when serious.
In order to meet higher performance, technology requirement, the sealing structure of existing low pressure valve is mostly matched by the sealing set on metal seat valve
The sealing pair of rubber pad composition set on conjunction face and spool, still, due to the chemical characteristic of rubber, for a long time in closing shape
After state, metal combination face can stick together with rubber pad, and sealing surface is more smooth, the lower adhesion phenomenon of rubber hardness is more serious,
And then cause valve when opening for the first time practical Opening pressure be more than design pressure.
Invention content
The object of the present invention is to provide a kind of valve sealing structure, to solve existing valve sealing structure easily because of rubber
Adhesion and cause valve when opening for the first time practical Opening pressure be more than design pressure the problem of.Meanwhile the present invention also provides one
Kind uses the check valve of the sealing structure and the valve body of check valve.
To achieve the above object, the present invention in valve sealing structure the technical solution adopted is that：
1. valve sealing structure of scheme, including valve body and spool, spool is equipped with rubber pad, and valve body is equipped with valve seat, valve seat tool
It is useful for being formed the sealing mating surface of sealing pair with rubber pad, the outermost layer of the sealing mating surface is sprayed plastic coat, the spray
Moulding coating is formed by the Teflon sprayed.
Valve sealing structure of the scheme 2. according to scheme 1, the spool includes stairstepping cylinder, on the valve body
Equipped with for stairstepping cylinder be oriented to slidable fit valve chamber, the stairstepping cylinder front end closing and front end be path section, institute
It states rubber pad to be arranged on the front end face of stairstepping cylinder, the path section is equipped with radial through-hole.
Valve sealing structure of the scheme 3. according to scheme 2 is coated with Teflon on the internal perisporium of the valve chamber.
Valve sealing structure of the scheme 4. according to scheme 1 or 2 or 3 is equipped at the inlet of the medium on the valve body
Filter screen.
Valve sealing structure of the scheme 5. according to scheme 1 or 2 or 3, the shore hardness of the rubber pad is 72~75
Degree.
In the present invention valve valve body the technical solution adopted is that：
The valve body of 1. valve of scheme, including valve seat, the valve seat has to form the close of sealing pair with the rubber pad on spool
Mating surface is sealed, the outermost layer of the sealing mating surface is sprayed plastic coat, and the sprayed plastic coat is formed by the Teflon sprayed.
Valve body of the scheme 2. according to scheme 1, the valve body are equipped with the stairstepping cylinder guiding slip dress for spool
The valve chamber matched is coated with Teflon on the internal perisporium of the valve chamber.
Valve body of the scheme 3. according to scheme 1 or 2 is equipped with filter screen at the inlet of the medium on the valve body.
Valve body of the scheme 4. according to scheme 1 or 2, the shore hardness of the rubber pad is 72~75 degree.
A kind of low pressure valve in the present invention the technical solution adopted is that：
A kind of 1. low pressure valve of scheme, including valve body and spool, spool is equipped with rubber pad, and valve body is equipped with valve seat, and valve seat has
For forming the sealing mating surface of sealing pair with rubber pad, the outermost layer of the sealing mating surface is sprayed plastic coat, the plastic-spraying
Coating is formed by the Teflon sprayed.
Low pressure valve of the scheme 2. according to scheme 1, the spool include stairstepping cylinder, and the valve body, which is equipped with, to be supplied
Stairstepping cylinder be oriented to slidable fit valve chamber, the stairstepping cylinder front end closing and front end be path section, the rubber
Pad is arranged on the front end face of stairstepping cylinder, and the path section is equipped with radial through-hole, is sprayed on the internal perisporium of the valve chamber
There is Teflon.
Low pressure valve of the scheme 3. according to scheme 1 or 2 is equipped with filter screen at the inlet of the medium on the valve body.
Low pressure valve of the scheme 4. according to scheme 1 or 2, the shore hardness of the rubber pad is 72~75 degree.
Advantageous effect：The present invention is matched using above-mentioned technical proposal, the sealing for being used to be formed sealing pair with rubber pad of valve seat
The outermost layer in conjunction face is sprayed plastic coat, and the sprayed plastic coat is formed by the Teflon sprayed, since Teflon is with good
Non-stick, therefore rubber can be avoided to be adhered in sealing mating surface and influence first Opening pressure, also, spool can be adopted
It with existing spool, is not required to by specially treated, replacement easy to repair, versatility is good.
Further, spool includes being oriented to the dynamic stairstepping cylinder being arranged in the valve chamber of valve body, and spool uses stairstepping
Cylinder can realize good guiding, and forced area when can improve valve opening, improve sensitivity.Furthermore it is possible to
Teflon is sprayed on the internal perisporium of valve chamber, so as to further reduce frictional resistance when opening, provides properties of product.
Further, filter screen is equipped at the inlet of the medium on the valve body, can ensure the cleanliness factor of medium, is improved
The job stability of valve.
Description of the drawings
Fig. 1 is the structure diagram of the embodiment one of valve sealing structure in the present invention；
Fig. 2 is the structure diagram of the embodiment two of valve sealing structure in the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Valve sealing structure one embodiment of the present invention is as shown in Figure 1, be a kind of low pressure check valve, mainly including valve body
With spool 5, valve body includes auxiliary valve body 1, main valve body 6, and one end of main valve body 6 is equipped with medium inlet 9, and the other end is equipped with external screw thread,
It is threadedly coupled between auxiliary valve body 1 and main valve body 6 and sealing is realized using O-ring 3.The runner inner end of auxiliary valve body, which is equipped with, has week
To the spring base 2 of through flow hole, the peripheral surface of spring base 2 is cascaded surface, forms the positioning rank for being arranged and being axially positioned for spring 4
Ladder, the outer circle of spring base 2 and the endoporus clearance fit of auxiliary valve body 1.
Spool 5 uses valve form, is made of metal, including stairstepping cylinder, the preceding end seal of the stairstepping cylinder
It closes and front end is path section, front end face is equipped with groove, vulcanizes in groove and be fixed with rubber pad 8.Valve body is equipped with for stairstepping
The outer circle of the valve chamber of cylinder guiding slidable fit, valve chamber and spool 5 is clearance fit.Valve chamber is close to one end of medium inlet 9
Hierarchic structure forms valve seat, and the inner face of valve seat forms the sealing mating surface for forming sealing pair with rubber pad 8, described close
Envelope mating surface is metal plastic-spraying face, and outermost layer is sprayed plastic coat, and the sprayed plastic coat is formed by the Teflon sprayed, described
Also Teflon is coated on the internal perisporium of valve chamber, the thickness of the Teflon of spraying is 10~15 μm.
In addition, being equipped with filter screen at inlet of the medium on valve body, in the present embodiment, filter screen selects filtering accuracy as 5 μ
The stainless steel filtering net of m, model MXW5 317 × 2100/0.036 × 0.025（GB/T21648-2008）.
In use, when check valve is without flow of media, spool connects under the action of the pretightning force of spring 4 with metal plastic-spraying face
It touches, valve is closed；When valve inlet is passed through medium and pressure medium is more than the pretightning force of spring 4, valve is opened
It opens.The Opening pressure of check valve can reach below 0.05MPa.
The embodiment of the present invention two is as shown in Fig. 2, the difference lies in spool 5 is in the present embodiment with embodiment one
Block, spool 5 are equipped with the shaft shoulder 10 being slidably matched with the valve chamber guiding on valve body 1, and the shaft shoulder 10 is equipped with for flow of media
Through-hole 11, is only used on valve chamber being formed in the sealing mating surface of sealing pair with rubber pad 8 and is coated with Teflon.At this point, on spool 5
It is not required to setting radial through-hole.
The embodiment of the present invention three, the difference lies in the media outlet of valve is set in the present embodiment with embodiment two
It puts on the side wall of the close medium inlet 9 of valve chamber, with medium inlet 9 and be to be arranged vertically, spool is cylindrical structure, directly
It is slidably matched with valve chamber guiding, is sprayed on the madial wall of valve chamber and for being formed with rubber pad 8 in the sealing mating surface of sealing pair
It is coated with Teflon.
The embodiment of the present invention four, the difference lies in medium flow field inlet is opens in the present embodiment with embodiment one
Structure is put, is not provided with filter screen.
Valve body in the present invention in the embodiment of the valve body of valve, that is, above-mentioned valve sealing structure in embodiment, low pressure valve
Check valve in embodiment, that is, above-mentioned valve sealing structure, details are not described herein again for concrete structure.Certainly, in other embodiments,
Above-mentioned valve sealing structure can be used for the higher valve of pressure, and can be used for other kinds of valve, such as safe
Valve.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To carry out the modification for being not required to make the creative labor or to which part skill to the technical solution recorded in foregoing embodiments
Art feature carries out equivalent replacement.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on,
It should all be included in the protection scope of the present invention.
Claims (10)
1. valve sealing structure, including valve body and spool, spool is equipped with rubber pad, and valve body is equipped with valve seat, and valve seat, which has, to be used
In the sealing mating surface that sealing pair is formed with rubber pad, it is characterised in that：The outermost layer of the sealing mating surface is sprayed plastic coat,
The sprayed plastic coat is formed by the Teflon sprayed.
2. valve sealing structure according to claim 1, it is characterised in that：The spool includes stairstepping cylinder, described
Valve body is equipped with the valve chamber that slidable fit is oriented to for stairstepping cylinder, and the front end closing of the stairstepping cylinder and front end are path
Section, the rubber pad are arranged on the front end face of stairstepping cylinder, and the path section is equipped with radial through-hole.
3. valve sealing structure according to claim 2, it is characterised in that：Teflon is coated on the internal perisporium of the valve chamber
Dragon.
4. according to the valve sealing structure described in claims 1 or 2 or 3, it is characterised in that：Inlet of the medium on the valve body
Place is equipped with filter screen.
5. according to the valve sealing structure described in claims 1 or 2 or 3, it is characterised in that：The shore hardness of the rubber pad is
72~75 degree.
6. the valve body of valve, including valve seat, the valve seat has matches for forming the sealing of sealing pair with the rubber pad on spool
Conjunction face, it is characterised in that：The outermost layer of the sealing mating surface is sprayed plastic coat, and the sprayed plastic coat is the Teflon by spraying
It is formed.
7. valve body according to claim 6, it is characterised in that：The valve body is equipped with the stairstepping cylinder guiding for spool
The valve chamber of slidable fit is coated with Teflon on the internal perisporium of the valve chamber.
8. the valve body described according to claim 6 or 7, it is characterised in that：Filtering is equipped at inlet of the medium on the valve body
Net.
9. the valve body described according to claim 6 or 7, it is characterised in that：It is characterized in that：The shore hardness of the rubber pad is
72~75 degree.
10. a kind of low pressure valve, it is characterised in that：The low pressure valve is described in any one employed in claim 1-5
The low pressure valve of valve sealing structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710669225X | 2017-08-08 | ||
| CN201710669225 | 2017-08-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108223858A true CN108223858A (en) | 2018-06-29 |
Family
ID=62654411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710750588.6A Pending CN108223858A (en) | 2017-08-08 | 2017-08-28 | Valve sealing structure, valve and the low pressure valve using the sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108223858A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058529A (en) * | 2018-09-28 | 2018-12-21 | 苏州丹顿机电有限公司 | A kind of swing check valve |
| CN109944965A (en) * | 2019-04-17 | 2019-06-28 | 西安硕格电子科技有限公司 | A kind of safety valve mechanism of airborne chemical oxygen-producing device |
| CN114294452A (en) * | 2022-01-26 | 2022-04-08 | 沈阳航天新光集团有限公司 | Check valve with filtering capability |
| CN114607809A (en) * | 2020-12-08 | 2022-06-10 | 未势能源科技有限公司 | One-way valve and hydrogen storage system of vehicle |
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| CN205859257U (en) * | 2016-07-21 | 2017-01-04 | 金川集团股份有限公司 | A kind of split type non-return valve |
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| CN205956481U (en) * | 2016-08-20 | 2017-02-15 | 瑞立集团瑞安汽车零部件有限公司 | Safety valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109058529A (en) * | 2018-09-28 | 2018-12-21 | 苏州丹顿机电有限公司 | A kind of swing check valve |
| CN109944965A (en) * | 2019-04-17 | 2019-06-28 | 西安硕格电子科技有限公司 | A kind of safety valve mechanism of airborne chemical oxygen-producing device |
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| CN114294452A (en) * | 2022-01-26 | 2022-04-08 | 沈阳航天新光集团有限公司 | Check valve with filtering capability |
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180629 |
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| RJ01 | Rejection of invention patent application after publication |