CN105465430A - Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition - Google Patents
Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition Download PDFInfo
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- CN105465430A CN105465430A CN201510086363.6A CN201510086363A CN105465430A CN 105465430 A CN105465430 A CN 105465430A CN 201510086363 A CN201510086363 A CN 201510086363A CN 105465430 A CN105465430 A CN 105465430A
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Abstract
The invention provides a decompression valve triggered through the pressing rod instability and suitable for a high-pressure working condition. The decompression valve mainly comprises a valve body, a lower side flange, a piston, a valve cover, a rod cage, a slender rod, a rod cap and a right side flange. The slender rod is the part for triggering the decompression valve to act. When the medium pressure in the upper stream of the device is lower than the set value, an axial load acting on the slender rod through the piston by the medium pressure is smaller than a critical load of the slender rod, the slender rod remains stable, the piston is located in the first operating position, and thus the device is in a closed state; when the medium pressure in the upper stream of the device reaches the set value, an axial load acting on the slender rod through the piston by the medium pressure is larger than the critical load of the slender rod, and the slender rod is instable, so that the effective length of the slender rod is significantly decreased instantaneously, the piston moves to the second operating position under the push of the medium pressure and is disengaged from a valve seat for enabling the device to be started at the moment, and therefore the purpose that the device is automatically started for decompressing under an overpressure working condition is achieved.
Description
Technical field
The present invention relates to a kind of pressure relief device, relate to a kind of pressure relief device can automatically opened when pressure exceedes setting value more specifically.
Background technique
In industries such as oil, mining, drilling wells; the perils such as the blast that may cause to prevent blowout and blowout out of control; the device of the pipeline of protective system and their upstream and downstream and equipment, can open the safety installations of pressure release automatically under often needing to be arranged on superpressure operating mode.
The present invention is a kind of strut buckling flip-over type pressure relief device, and can be applicable to high pressure operating mode by its effective lifting surface area of adjustment, and has very high pressure release precision.
Summary of the invention
The strut buckling flip-over type Decompression valves being applicable to high pressure operating mode that the present invention relates to, critical piece comprises valve body, lower side flange, piston, valve gap, bar cage, elongate rod, pole cap and right flange.
Wherein, the parts triggering Decompression valves action are elongate rod, and it is installed on valve body outside, and one end connects with piston, and the other end connects with the pole cap be installed on bar cage.When the pressure medium of device upstream is lower than setting value, pressure medium is less than the ultimate load of elongate rod by the thrust load of piston action in elongate rod, and elongate rod keeps stable, and piston is in working position one, and device is in closed condition; When the pressure medium of device upstream reaches setting value, pressure medium is greater than the ultimate load of elongate rod by the thrust load of piston action in elongate rod, elongate rod unstability causes its effective length moment significantly to diminish, piston moves to working position two under pressure medium promotes, now piston disengaging valve seat makes device open, thus achieves the object that superpressure operating mode lower device opens pressure release automatically.
The strut buckling flip-over type Decompression valves being applicable to high pressure operating mode that the present invention relates to, the effective diameter chosen of its piston two ends seal ring is different, the pressure of medium by act on piston two seal rings between anchor ring on.Can by this annular of Reasonable adjustment effectively lifting surface area, make Decompression valves with apply operating mode pressure adapt.
Accompanying drawing explanation
Fig. 1 is the main structure figure being applicable to the strut buckling flip-over type Decompression valves of high pressure operating mode that the present invention relates to;
Fig. 2 is two the piston seal loop diameters being applicable to the strut buckling flip-over type Decompression valves of high pressure operating mode and the effective lifting surface area schematic diagram of annular that the present invention relates to;
Fig. 3 be the present invention relates to be applicable to the strut buckling flip-over type Decompression valves normal state of high pressure operating mode time schematic diagram;
Schematic diagram when Fig. 4 is the strut buckling flip-over type Decompression valves pressure release state of high pressure operating mode that is applicable to that the present invention relates to;
Embodiment
Be applicable to the strut buckling flip-over type Decompression valves of high pressure operating mode, critical piece comprises valve body 1, lower side flange 2, piston 3, valve gap 4, bar cage 5, elongate rod 6, pole cap 7 and right flange 8.Wherein, the parts triggering Decompression valves action are elongate rod 6, are triggered the pressure release of valve by the strut buckling of elongate rod 6.As shown in Figure 1.
In normal conditions, medium flows into valve body 1 from right flange 8 as shown in Figure 1.After valve triggers pressure release, medium can be discharged from lower side flange as shown in Figure 1.
Wherein, the seal ring effective diameter chosen in piston 3 two ends is different, the pressure of medium by act on piston 3 two seal rings between anchor ring on.Can by this annular of Reasonable adjustment effectively lifting surface area, make Decompression valves with apply operating mode pressure adapt.
Suppose that the external diameter of the small sealing ring of piston 3 is d, the external diameter of big sealing ring is D.Then the effective lifting surface area of annular is π (D
2-d
2)/4.As shown in Figure 2.When D and d size close to time, annular effectively lifting surface area π (D
2-d
2)/4 can be very little.Even if the pressure of medium is very large, the axial force acted in elongate rod 6 by the effective lifting surface area of annular is also very little, makes this structure be applicable to high pressure operating mode.
Introduce the specific embodiment of the present invention below.
In normal conditions, the pressure medium of device upstream is lower than setting value, and pressure medium is less than the ultimate load of elongate rod 6 by the effective lifting surface area of the annular of piston 3 thrust load acted in elongate rod 6, and elongate rod 6 keeps stable, piston 3 is in working position one, and device is in closed condition.See Fig. 3.
Under damage, when the pressure medium of device upstream reaches setting value, pressure medium exceedes the ultimate load of elongate rod 6 by the effective lifting surface area of the annular of piston 3 thrust load acted in elongate rod 6, elongate rod 6 unstability causes its effective length moment significantly to diminish, piston 3 moves to working position two under pressure medium promotes, and the lower side flange 2 of now piston 3 disengaging makes device open and pressure release.See Fig. 4.
After valve pressure release, can from valve body outside by promoting with the valve rod of piston 3 one, piston 3 to be resetted, then elongate rod 6 changed, valve recovers sealing state.
According to the Euler law of strut buckling, its ultimate load can be changed by the Young's modulus of adjustment elongate rod 6 and slenderness ratio, and then setting pressure during modifier action.
All features disclosed in this specification, or the step in disclosed all methods or process, except the special type mutually repelled and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalence or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (3)
1. one kind is applicable to the strut buckling flip-over type Decompression valves of high pressure operating mode, its critical piece comprises valve body (1), lower side flange (2), piston (3), valve gap (4), bar cage (5), elongate rod (6), pole cap (7) and right flange (8), it is characterized in that: the parts triggering Decompression valves action are elongate rod (6), triggered the pressure release of valve by the strut buckling of elongate rod (6).
2. the strut buckling flip-over type Decompression valves being applicable to high pressure operating mode according to claim 1, wherein the seal ring effective diameter chosen in piston (3) two ends is different, on the anchor ring between two seal rings that the pressure of medium will act on piston (3).
3. the strut buckling flip-over type Decompression valves being applicable to high pressure operating mode according to claim 1, the pressure medium load that wherein the annular useful area of piston (3) bears will act in elongate rod (6), when pressure medium is lower than setting value, pressure medium is less than the ultimate load of elongate rod (6) by the effective lifting surface area of the annular thrust load acted in elongate rod (6) of piston (3), elongate rod (6) keeps stable, piston (3) is in working position one, and device is in closed condition; When pressure medium exceedes setting value, pressure medium exceedes the ultimate load of elongate rod (6) by the effective lifting surface area of the annular thrust load acted in elongate rod (6) of piston (3), elongate rod (6) unstability causes its effective length moment significantly to diminish, piston (3) moves to working position two under pressure medium promotes, and the lower side flange (2) of now piston (3) disengaging makes device open and pressure release; After valve pressure release, can from valve body outside by promoting with the valve rod of piston (3) one, piston (3) to be resetted, then elongate rod (6) changed, valve recovers sealing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086363.6A CN105465430A (en) | 2015-02-17 | 2015-02-17 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086363.6A CN105465430A (en) | 2015-02-17 | 2015-02-17 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105465430A true CN105465430A (en) | 2016-04-06 |
Family
ID=55603442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510086363.6A Pending CN105465430A (en) | 2015-02-17 | 2015-02-17 | Decompression valve triggered through pressing rod instability and suitable for high-pressure working condition |
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| CN (1) | CN105465430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373027A (en) * | 2018-12-17 | 2019-02-22 | 金冬梅 | A kind of Spring-Loaded Pressure Relief Valve that spring service life is high |
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|---|---|---|---|---|
| JP2004169892A (en) * | 2002-11-22 | 2004-06-17 | National Institute Of Advanced Industrial & Technology | Working pressure variable type pressure relief valve |
| WO2004111452A1 (en) * | 2003-06-13 | 2004-12-23 | Dietmar Kaiser Ag | High-pressure pump |
| CN202731836U (en) * | 2012-06-08 | 2013-02-13 | 刘海亮 | Novel pressure rod destabilization triggered wellhead shut-off valve |
| CN202812339U (en) * | 2012-06-08 | 2013-03-20 | 刘海亮 | Novel pressure lever instability triggering pressure release valve |
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN204805646U (en) * | 2015-02-17 | 2015-11-25 | 刘海亮 | Depression bar unstability triggers type relief valve suitable for high pressure operating mode |
-
2015
- 2015-02-17 CN CN201510086363.6A patent/CN105465430A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004169892A (en) * | 2002-11-22 | 2004-06-17 | National Institute Of Advanced Industrial & Technology | Working pressure variable type pressure relief valve |
| WO2004111452A1 (en) * | 2003-06-13 | 2004-12-23 | Dietmar Kaiser Ag | High-pressure pump |
| CN202812338U (en) * | 2012-02-20 | 2013-03-20 | 刘海亮 | Pressure bar instability trigger type decompression valve |
| CN202731836U (en) * | 2012-06-08 | 2013-02-13 | 刘海亮 | Novel pressure rod destabilization triggered wellhead shut-off valve |
| CN202812339U (en) * | 2012-06-08 | 2013-03-20 | 刘海亮 | Novel pressure lever instability triggering pressure release valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN204805646U (en) * | 2015-02-17 | 2015-11-25 | 刘海亮 | Depression bar unstability triggers type relief valve suitable for high pressure operating mode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373027A (en) * | 2018-12-17 | 2019-02-22 | 金冬梅 | A kind of Spring-Loaded Pressure Relief Valve that spring service life is high |
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Application publication date: 20160406 |
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| WD01 | Invention patent application deemed withdrawn after publication |