CN108443562B - Overpressure-proof double-limit sealing structure - Google Patents
Overpressure-proof double-limit sealing structure Download PDFInfo
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- CN108443562B CN108443562B CN201810225411.9A CN201810225411A CN108443562B CN 108443562 B CN108443562 B CN 108443562B CN 201810225411 A CN201810225411 A CN 201810225411A CN 108443562 B CN108443562 B CN 108443562B
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- Prior art keywords
- valve
- end spring
- valve seat
- valve core
- sealing
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- 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
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- 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 invention provides an overpressure-preventing double-limit sealing structure, which comprises: the valve core end spring base, the valve core end spring, the valve core, the valve body, the sealing ring, the valve seat end spring and the valve seat end spring base; a valve core, a valve core end spring and a valve core end spring base are sequentially arranged on the left side in the valve body; the valve seat, the valve seat end spring and the valve seat end spring base are sequentially installed on the right side in the valve body, and the sealing ring is sleeved on the valve seat. The invention adopts a double-limit mode, the valve core and the valve seat are both movable parts, and the problem that the sealing specific pressure exceeds the allowable sealing specific pressure is solved.
Description
Technical Field
The invention relates to the field of fluid sealing structures, in particular to an overpressure-preventing double-limit sealing structure.
Background
During the use of the valve, working conditions that the medium pressure exceeds the set pressure often occur, the non-metal sealing material has the limitation of allowable sealing specific pressure, and once the allowable sealing specific pressure is exceeded, the sealing function of the product is affected.
In the traditional design, the displacement of a valve core (a non-metal sealing surface) is limited by a limiting structure usually, so that the non-metal deformation is controlled within the elastic change, but the structure is difficult to design in place at one time, and when the limiting distance is too small, the sealing specific pressure generated by the displacement of the valve core cannot meet the sealing requirement, so that the valve cannot be effectively sealed; when the limit distance is too large, the specific sealing pressure generated by the displacement of the valve core exceeds the allowable specific sealing pressure, and the sealing structure can be damaged.
Disclosure of Invention
In order to solve the technical problems, the invention provides an overpressure-preventing double-limit sealing structure, which adopts a double-limit mode, wherein a valve core and a valve seat are both movable parts, and the problem that the sealing specific pressure exceeds the allowable sealing specific pressure is solved.
In order to achieve the purpose, the invention is specifically realized by the following technical scheme:
prevent two spacing seal structure of superpressure includes: the valve core end spring base, the valve core end spring, the valve core, the valve body, the sealing ring, the valve seat end spring and the valve seat end spring base; a valve core, a valve core end spring and a valve core end spring base are sequentially arranged on the left side in the valve body; a valve seat, a valve seat end spring and a valve seat end spring base are sequentially arranged on the right side in the valve body, and the sealing ring is sleeved on the valve seat;
both the valve seat end and the valve core end can intake air;
the middle part of the valve body is provided with a protruded stop block, and the stop block is positioned between the valve core and the valve seat;
the valve core and the valve seat can reciprocate in the valve body for many times.
Preferably, the valve core end spring base and the valve seat end spring base are respectively installed at two ends in the valve body.
When the sealing specific pressure is lower than a set value, the spring force of the valve core end is greater than the sum of the medium pressure and the spring force of the valve seat end, the valve core limiting surface is attached to the valve body stop block, and the sealing specific pressure is provided by the medium pressure and the spring force of the valve seat end; when the sealing specific pressure is higher than a set value, the spring force of the valve core end is smaller than the sum of the medium pressure and the spring force of the valve seat end, the valve seat limiting surface is attached to the valve body stop block, the sealing specific pressure is provided by the spring force of the valve core end, and the sealing specific pressure is irrelevant to the medium pressure.
Preferably, the valve seat end and the valve core end can both intake air, and in the valve core end air intake working mode, when the sealing specific pressure is lower than a set value, the spring force of the valve seat end is greater than the sum of the medium pressure and the spring force of the valve core end, and the valve seat limiting surface is attached to the valve body stop block.
The invention has the following beneficial effects:
the invention adopts a double-limit mode, the valve core and the valve seat are both movable parts, and the problem that the sealing specific pressure exceeds the allowable sealing specific pressure is solved.
Drawings
Other features and objects of the present invention will become more apparent upon reading the detailed description of the non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of an overpressure-proof double-limit sealing structure according to an embodiment of the invention;
in the figure: 1-valve core end spring base, 2-valve core end spring, 3-valve core, 4-valve body, 5-sealing ring, 6-valve seat, 7-valve seat end spring, 8-valve seat end spring base.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides an overpressure-preventing double-limit sealing structure, including: the valve core end spring comprises a valve core end spring base 1, a valve core end spring 2, a valve core 3, a valve body 4, a sealing ring 5, a valve seat 6, a valve seat end spring 7 and a valve seat end spring base 8; a valve core 3, a valve core end spring 2 and a valve core end spring base 1 are sequentially arranged on the left side in the valve body 4; the valve seat 6, the valve seat end spring 7 and the valve seat end spring base 8 are sequentially arranged on the inner right side of the valve body 4, and the sealing ring 5 is sleeved on the valve seat 6. The valve core end spring base 1 and the valve seat end spring base 8 are respectively arranged at two ends in the valve body 4; both the end 6 of the valve seat and the end 3 of the valve core can intake air; a protruded stop block is arranged in the middle of the valve body 4 and is positioned between the valve core 3 and the valve seat 6; the valve element 3 and the valve seat 6 can reciprocate in the valve body 4 for multiple times.
When the sealing specific pressure is lower than a set value, the force of the valve core end spring 2 is larger than the sum of the medium pressure and the force of the valve seat end spring 7, the limiting surface of the valve core 3 is attached to the stop block of the valve body 4, and the sealing specific pressure is provided by the medium pressure and the force of the valve seat end spring 7; when the sealing specific pressure is higher than a set value, the force of the valve core end spring 2 is smaller than the sum of the medium pressure and the force of the valve seat end spring 7, the limiting surface of the valve seat 6 is attached to the stop block of the valve body 4, the sealing specific pressure is provided by the force of the valve core end spring 2, and the sealing specific pressure is irrelevant to the medium pressure.
Therefore, the double-limit sealing structure does not particularly refer to air inlet of the valve seat 6, and air inlet of the valve core 3 can be realized, in the working mode, when the sealing specific pressure is lower than a set value, the force of the valve seat end spring 7 is larger than the sum of the medium pressure and the force of the valve core end spring 2, and the limit surface of the valve seat 6 is attached to the stop block of the valve body 4.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (3)
1. Prevent two spacing seal structure of superpressure includes: the valve core end spring comprises a valve core end spring base (1), a valve core end spring (2), a valve core (3), a valve body (4), a sealing ring (5), a valve seat (6), a valve seat end spring (7) and a valve seat end spring base (8); the method is characterized in that: a valve core (3), a valve core end spring (2) and a valve core end spring base (1) are sequentially arranged on the left side in the valve body (4); a valve seat (6), a valve seat end spring (7) and a valve seat end spring base (8) are sequentially arranged on the inner right side of the valve body (4), and the sealing ring (5) is sleeved on the valve seat (6);
both the valve seat (6) end and the valve core (3) end can be used for air inlet;
a protruded stop block is arranged in the middle of the valve body (4), and the stop block is positioned between the valve core (3) and the valve seat (6);
the valve core (3) and the valve seat (6) can reciprocate for multiple times in the valve body (4);
when the sealing specific pressure is lower than a set value, the force of the valve core end spring (2) is larger than the sum of the medium pressure and the force of the valve seat end spring (7), the limiting surface of the valve core (3) is attached to the stop block of the valve body (4), and the sealing specific pressure is provided by the medium pressure and the force of the valve seat end spring (7); when the sealing specific pressure is higher than a set value, the force of the valve core end spring (2) is smaller than the sum of the medium pressure and the force of the valve seat end spring (7), the limiting surface of the valve seat (6) is attached to the stop block of the valve body (4), the sealing specific pressure is provided by the force of the valve core end spring (2), and the sealing specific pressure is irrelevant to the medium pressure.
2. The overpressure-preventing double-limit sealing structure as claimed in claim 1, wherein the valve core end spring base (1) and the valve seat end spring base (8) are respectively installed at two ends in the valve body (4).
3. The overpressure-preventing double-limit sealing structure as claimed in claim 1, wherein both the valve seat (6) end and the valve core (3) end can be used for air intake, in the valve core (3) end air intake working mode, when the sealing specific pressure is lower than a set value, the force of the valve seat end spring (7) is larger than the sum of the medium pressure and the force of the valve core end spring (2), and the limiting surface of the valve seat (6) is attached to the stop block of the 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 CN108443562A (en) | 2018-08-24 |
| CN108443562B true CN108443562B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225411.9A Active CN108443562B (en) | 2018-03-19 | 2018-03-19 | Overpressure-proof double-limit sealing structure |
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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 transportation 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 transportation 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 |
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| Publication number | Publication date |
|---|---|
| CN108443562A (en) | 2018-08-24 |
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