CN108443562A - The double limit sealing structures of superpressure preventing - Google Patents
The double limit sealing structures of superpressure preventing Download PDFInfo
- Publication number
- CN108443562A CN108443562A CN201810225411.9A CN201810225411A CN108443562A CN 108443562 A CN108443562 A CN 108443562A CN 201810225411 A CN201810225411 A CN 201810225411A CN 108443562 A CN108443562 A CN 108443562A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- end spring
- spool
- valve
- valve body
- 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.)
- Granted
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The present invention provides a kind of double limit sealing structures of superpressure preventing, including：Spool end spring pedestal, spool end spring, spool, valve body, sealing ring, valve seat, valve seat end spring and valve seat end spring pedestal；Spool, spool end spring, spool end spring pedestal are installed in left side successively in valve body；Valve seat, valve seat end spring, valve seat end spring pedestal are installed in right side successively in valve body, and the sealing ring is sleeved on valve seat.For the present invention using double limit patterns, spool and valve seat are movable part, solve the problems, such as that seal pressure exceeds seal pressure allowable.
Description
Technical field
The present invention relates to fluid seal structure fields, and in particular to a kind of double limit sealing structures of superpressure preventing.
Background technology
During the use of valve, it often will appear operating mode of some pressure mediums beyond setting pressure, and it is nonmetallic
Sealing material has the limitation of seal pressure allowable again, once exceeding seal pressure allowable, the sealing function of product just will be by shadow
It rings.
In traditional design, the displacement of spool (nonmetallic sealing surface) is usually limited by position limiting structure, is made non-
Metal strain controls within Flexible change, but this structure is difficult disposably to design in place, when limit distance is too small, valve
The seal pressure that core displacement generates is unsatisfactory for seal request, and valve just can not be sealed effectively；When limit distance is too big, spool position
It moves the seal pressure generated and exceeds seal pressure allowable, sealing structure may be destroyed again.
Invention content
In order to solve the above technical problems, the present invention provides a kind of double limit sealing structures of superpressure preventing, using double limit moulds
Formula, spool and valve seat are movable part, solve the problems, such as that seal pressure exceeds seal pressure allowable.
To achieve the above object, the present invention is realized especially by following technical scheme：
The double limit sealing structures of superpressure preventing, including：Spool end spring pedestal, spool end spring, spool, valve body, sealing ring,
Valve seat, valve seat end spring and valve seat end spring pedestal；Spool, spool end spring, spool end spring are installed in left side successively in valve body
Pedestal；Valve seat, valve seat end spring, valve seat end spring pedestal are installed in right side successively in valve body, and the sealing ring is sleeved on valve seat.
Preferably, the spool end spring pedestal, valve seat end spring pedestal are separately mounted to both ends in the valve body.
Wherein, when seal pressure is less than setting value, spool end spring force be more than pressure medium and valve seat end spring force it
With spool confined planes are bonded with valve body, and seal pressure is provided by pressure medium and valve seat end spring force；It is set when seal pressure is higher than
When definite value, spool end spring force is less than the sum of pressure medium and valve seat end spring force, and valve seat confined planes are bonded with valve body, seals ratio
Pressure is provided by spool end spring force, and seal pressure is unrelated with pressure medium.
Preferably, valve seat end air inlet and spool end can air inlet, under this operating mode, when seal pressure is less than setting
When definite value, valve seat end spring force is more than the sum of pressure medium and spool end spring force, and valve seat confined planes are bonded with valve body.
The invention has the advantages that：
For the present invention using double limit patterns, spool and valve seat are movable part, solve seal pressure beyond allowable close
The problem of envelope is than pressure.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Purpose will become more apparent upon：
Fig. 1 is the schematic diagram of the double limit sealing structures of superpressure preventing of the embodiment of the present invention；
In figure：1-spool end spring pedestal, 2-spool end springs, 3-spools, 4-valve bodies, 5-sealing rings, 6-valves
Seat, 7-valve seat end springs, 8-valve seat end spring pedestals.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
As shown in Figure 1, an embodiment of the present invention provides the double limit sealing structures of superpressure preventing, including：Spool end spring pedestal
1, spool end spring 2, spool 3, valve body 4, sealing ring 5, valve seat 6, valve seat end spring 7 and valve seat end spring pedestal 8；In valve body 4
Left side is installed by spool 3, spool end spring 2, spool end spring pedestal 1 successively；Valve seat 6, valve seat end are installed in right side successively in valve body 4
Spring 7, valve seat end spring pedestal 8, and the sealing ring 5 is sleeved on valve seat 6.The spool end spring pedestal 1, valve seat end spring
Pedestal 8 is separately mounted to both ends in the valve body 4.
When seal pressure is less than setting value, 2 power of spool end spring is more than the sum of pressure medium and 7 power of valve seat end spring,
3 confined planes of spool are bonded with valve body 4, and seal pressure is provided by pressure medium and 7 power of valve seat end spring；It is set when seal pressure is higher than
When definite value, 2 power of spool end spring is less than the sum of pressure medium and 7 power of valve seat end spring, and 6 confined planes of valve seat are bonded with valve body 4, close
Envelope is provided than pressure by 2 power of spool end spring, and seal pressure is unrelated with pressure medium.
This is double limit sealing structures, and is not specific to 6 air inlet of valve seat, also can 3 end air inlet of spool, this operating mode
Under, when seal pressure is less than setting value, spring 7 power in valve seat end is more than the sum of pressure medium and 2 power of spool end spring, valve seat 6
Confined planes are bonded with valve body 4.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (4)
1. the double limit sealing structures of superpressure preventing, including：Spool end spring pedestal (1), spool end spring (2), spool (3), valve body
(4), sealing ring (5), valve seat (6), valve seat end spring (7) and valve seat end spring pedestal (8)；It is characterized in that：It is left in valve body (4)
Side is installed by spool (3), spool end spring (2), spool end spring pedestal (1) successively；Valve seat is installed on right side successively in valve body (4)
(6), valve seat end spring (7), valve seat end spring pedestal (8), and the sealing ring (5) is sleeved on valve seat (6).
2. the double limit sealing structures of superpressure preventing as described in claim 1, which is characterized in that the spool end spring pedestal (1),
Valve seat end spring pedestal (8) is separately mounted to the valve body (4) interior both ends.
3. the double limit sealing structures of superpressure preventing as described in claim 1, which is characterized in that when seal pressure is less than setting value
When, spool end spring (2) power is more than the sum of pressure medium and valve seat end spring (7) power, and spool (3) confined planes are pasted with valve body (4)
It closes, seal pressure is provided by pressure medium and valve seat end spring (7) power；When seal pressure is higher than setting value, spool end spring
(2) power be less than the sum of pressure medium and valve seat end spring (7) power, valve seat (6) confined planes are bonded with valve body (4), seal pressure by
Spool end spring (2) power provides, and seal pressure is unrelated with pressure medium.
4. the double limit sealing structures of superpressure preventing as described in claim 1, which is characterized in that valve seat (6) the end air inlet and valve
Core (3) end can air inlet, under this operating mode, when seal pressure is less than setting value, valve seat end spring (7) power is more than medium
The sum of pressure and spool end spring (2) power, valve seat (6) confined planes are bonded with valve body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225411.9A CN108443562B (en) | 2018-03-19 | 2018-03-19 | Overpressure-proof double-limit sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225411.9A CN108443562B (en) | 2018-03-19 | 2018-03-19 | Overpressure-proof double-limit sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108443562A true CN108443562A (en) | 2018-08-24 |
| CN108443562B CN108443562B (en) | 2020-04-24 |
Family
ID=63195786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225411.9A Active CN108443562B (en) | 2018-03-19 | 2018-03-19 | Overpressure-proof double-limit sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108443562B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2507313A1 (en) * | 1975-02-20 | 1976-09-02 | Liebherr Mischtechnik Gmbh | Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove |
| CN2556440Y (en) * | 2002-07-01 | 2003-06-18 | 马洪刚 | Water cut-off self-closing valve |
| CN202252150U (en) * | 2011-08-23 | 2012-05-30 | 三一重机有限公司 | One-way check valve and oil conveying pipeline |
| CN105422928A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Self-locking check valve reliable in locking position |
| CN105422923A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Mechanical-locking self-locking check valve |
-
2018
- 2018-03-19 CN CN201810225411.9A patent/CN108443562B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2507313A1 (en) * | 1975-02-20 | 1976-09-02 | Liebherr Mischtechnik Gmbh | Non-return valve closed by excessive reverse flow velocity - has piston held open by forward flow and sprung ball in groove |
| CN2556440Y (en) * | 2002-07-01 | 2003-06-18 | 马洪刚 | Water cut-off self-closing valve |
| CN202252150U (en) * | 2011-08-23 | 2012-05-30 | 三一重机有限公司 | One-way check valve and oil conveying pipeline |
| CN105422928A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Self-locking check valve reliable in locking position |
| CN105422923A (en) * | 2015-12-09 | 2016-03-23 | 西安航天动力研究所 | Mechanical-locking self-locking check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108443562B (en) | 2020-04-24 |
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