CN104358902B - A kind of pressure safety valve - Google Patents
A kind of pressure safety valve Download PDFInfo
- Publication number
- CN104358902B CN104358902B CN201410546020.9A CN201410546020A CN104358902B CN 104358902 B CN104358902 B CN 104358902B CN 201410546020 A CN201410546020 A CN 201410546020A CN 104358902 B CN104358902 B CN 104358902B
- Authority
- CN
- China
- Prior art keywords
- chamber
- valve body
- valve
- push rod
- hydraulic fluid
- Prior art date
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- 239000012530 fluid Substances 0.000 claims abstract description 59
- 239000000446 fuel Substances 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000035939 shock Effects 0.000 abstract description 5
- 208000033999 Device damage Diseases 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses a kind of pressure safety valve, including valve body, first nonreturn valve core and valve body inner bore front portion surround the first chamber, described first nonreturn valve core surrounds the second chamber with push rod front end and valve body inner bore, surround the 3rd chamber with valve body inner bore in the middle part of described push rod, described putting back-end and valve body inner bore rear portion surround the 4th chamber, corresponding first nonreturn valve core of described valve body is provided with the second hydraulic fluid port, described valve body correspondence push rod front portion is provided with the 3rd hydraulic fluid port, corresponding 3rd chamber of described valve body is provided with the 4th hydraulic fluid port, corresponding 4th chamber of described valve body is provided with the 5th hydraulic fluid port, described second hydraulic fluid port and the 4th hydraulic fluid port connected tank, described 3rd hydraulic fluid port is connected in parallel in hydraulic system, described 5th hydraulic fluid port is fuel outlet, described 3rd chamber and the 4th chamber are provided with the holding pressure balanced pressure of push rod and keep structure.The present invention is prevented from compression shock, prevents device damage, improves device security.
Description
Technical field
The present invention relates to valve.
Background technology
At present in hydraulic system, solving hypertonia, or during compression shock, great majority are using pressure
System protected by insurance-type overflow valve, or adds unloading electromagnetic valve with pressure switch.
Use pressure safety type overflow valve or the scheme of decompression overflow valve, in any case, system is being pressed
Power is impacted, and when breaking down, before fault is not got rid of when equipment is restarted, pressure can re-establish,
Element the most to be protected or employee the most also can be dangerous.
The pressure switch used adds unloading electromagnetic valve scheme, when definite value set by pressure overpressure relay,
Relay open pipe is connected, and unloading electromagnetic valve obtains electric, is released by pressure, but this scheme has drawbacks described above,
I.e. when electric power of equipment is restarted, pressure can rise again, until it reaches just may be used during the setting pressure of pressure switch
With off-load again, and this scheme is the scheme of a kind of many valves combination, compares when mounted and takes up room.
Summary of the invention
The technical problem to be solved is just to provide a kind of pressure safety valve, compact conformation, prevents pressure
Power is impacted, and prevents device damage, improves device security.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that a kind of pressure safety valve, including
Valve body, the endoporus front-end and back-end of described valve body are closed, are movably equipped with a push rod in valve body inner bore, described
Valve body inner bore is provided with restriction push rod on rear side of push rod and slides backward the position limiting structure of position, sets on front side of described push rod
There is the first nonreturn valve core, between described first nonreturn valve core and valve body front end, be provided with the first spring, described push rod
Middle part and valve body inner bore between be provided with the second spring, be provided with the second nonreturn valve core on rear side of described push rod, described
Before being provided with the 3rd spring, described first nonreturn valve core and valve body inner bore between second nonreturn valve core and valve rear end
Portion surrounds the first chamber, and described first nonreturn valve core surrounds the second chamber, institute with push rod front end and valve body inner bore
Stating and surround the 3rd chamber in the middle part of push rod with valve body inner bore, described putting back-end and valve body inner bore rear portion surround the 4th
Chamber, corresponding first nonreturn valve core of described valve body is provided with the second hydraulic fluid port, and described valve body correspondence push rod front portion is provided with
3rd hydraulic fluid port, corresponding 3rd chamber of described valve body is provided with the 4th hydraulic fluid port, and corresponding 4th chamber of described valve body is provided with
5th hydraulic fluid port, described second hydraulic fluid port and the 4th hydraulic fluid port connected tank, described 3rd hydraulic fluid port is connected in parallel in hydraulic system,
Described 5th hydraulic fluid port is fuel outlet, the damping hole that described first nonreturn valve core is through before and after being provided with, described first
The cross-sectional area of chamber is more than the cross-sectional area of the second chamber, and the cross-sectional area of described 4th chamber is more than
The cross-sectional area of the second chamber, is provided with holding push rod pressure balanced in described 3rd chamber and the 4th chamber
Pressure keeps structure.
Preferably, described pressure keeps structure include the air bag being located in the 4th chamber and be located at the 3rd chamber
The first ladder shoulder on internal perisporium, described push rod rear portion is provided with the diameter the first multidiameter more than push rod middle front part
Portion.
Preferably, described air bag is ellipsoidal structure and is located at the 3rd spring inner.
Preferably, corresponding second spring of described 3rd chamber internal perisporium is provided with the second ladder shoulder, described second bullet
Spring front end abuts the second ladder shoulder, and described second spring rear end abuts the first multidiameter portion front end face.
Preferably, the hole at described push rod center be anterior diameter is little and shoulder hole that rearward diameter is big, described in push away
Bar is provided with the radial hole connected with aperture on front side of the enlarged diameter section of rear portion.
Preferably, described valve body inner bore front end is provided with plug closure, and described valve rear end is provided with valve gap and closes valve
Internal hole.
Preferably, a threaded adjusting rod on described valve gap, described 3rd spring afterbody elastic top is pressed in tune
On pole front end face.
Preferably, described first nonreturn valve core includes tapered portion and anterior vertical tube part, the described taper at rear portion
The damping hole arranged in portion is the shoulder hole that anterior big rear portion, aperture bore is little, and described first spring rear portion is located at
In vertical tube part.
Preferably, described second nonreturn valve core includes tapered portion and the cylindrical portion at rear portion, the described cylinder of front portion
It is provided with flange, described 3rd spring at front end face abutment flange rear end face around excircle in the middle part of portion.
Preferably, described position limiting structure is mounted to the elastic spring of valve body inner bore.
The present invention uses technique scheme, and when card valve or compression shock occurs in equipment, pressure can raise,
When pressure exceedes setting value, oil return opening is opened, and makes fluid be returned directly to fuel tank, and system pressure is classified as zero,
The internal push rod one end pressure check valve of valve maintains, if so fault is not excluded for, no matter how opens
Dynamic equipment, all without there being pressure, the most all executive components are all idle, which reduces danger,
It is thus able to prevent compression shock, prevents device damage, improve device security, be useful in press, note
Among the adventurous equipment such as molding machine.
Accompanying drawing explanation
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Embodiments of the invention are illustrated below in conjunction with Fig. 1.A kind of pressure safety valve, including valve body 1, institute
The endoporus front-end and back-end stating valve body 1 are closed, and are movably equipped with a push rod 3, described valve body in valve body 1 endoporus
Endoporus is provided with restriction push rod on rear side of push rod 3 and slides backward the position limiting structure of position, is provided with on front side of described push rod
First nonreturn valve core 2, is provided with the first spring 21 between described first nonreturn valve core and valve body front end, described in push away
It is provided with the second spring 31 between middle part and the valve body inner bore of bar, on rear side of described push rod, is provided with the second nonreturn valve core 4,
The 3rd spring 41, described first nonreturn valve core and valve body it is provided with between described second nonreturn valve core and valve rear end
Endoporus front portion surrounds the first chamber 11, and described first nonreturn valve core surrounds second with push rod front end and valve body inner bore
Chamber 12, surrounds the 3rd chamber 13, described putting back-end and valve body inner bore with valve body inner bore in the middle part of described push rod
Rear portion surrounds the 4th chamber 14, and corresponding first nonreturn valve core of described valve body is provided with the second hydraulic fluid port 102, described valve
Body correspondence push rod front portion is provided with the 3rd hydraulic fluid port 103, and corresponding 3rd chamber of described valve body is provided with the 4th hydraulic fluid port 104,
Corresponding 4th chamber of described valve body is provided with the 5th hydraulic fluid port 105, described second hydraulic fluid port and the 4th hydraulic fluid port connected tank, institute
Stating the 3rd hydraulic fluid port to be connected in parallel in hydraulic system, described 5th hydraulic fluid port is fuel outlet, described first nonreturn valve core and
The damping hole that the center of push rod is through before and after being equipped with, the cross-sectional area of described first chamber is more than the second chamber
The cross-sectional area of room, the cross-sectional area of described 4th chamber is more than the cross-sectional area of the second chamber, described
3rd chamber and the 4th chamber are provided with the holding pressure balanced pressure of push rod and keep structure.
Described pressure keeps structure include the air bag 5 being located in the 4th chamber and be located at the 3rd chamber internal perisporium
On the first ladder shoulder, described push rod rear portion is provided with diameter more than the first multidiameter portion of push rod middle front part.Institute
State air bag to be ellipsoidal structure and be located at the 3rd spring inner.Corresponding second spring of described 3rd chamber internal perisporium
Being provided with the second ladder shoulder, described second spring at front end abuts the second ladder shoulder, and described second spring rear end abuts
First multidiameter portion front end face.The hole at described push rod center be anterior diameter is little and shoulder hole that rearward diameter is big,
Described push rod is provided with the radial hole connected with aperture on front side of the enlarged diameter section of rear portion.Described valve body inner bore front end
Being provided with the first hydraulic fluid port 101, this first hydraulic fluid port is blocked by plug, and described valve rear end is provided with in valve gap closed valve
Hole.A threaded adjusting rod 6 on described valve gap, described 3rd spring afterbody elastic top is pressed in adjusting rod front end
On face.Described first nonreturn valve core includes the tapered portion at rear portion and anterior vertical tube part, and described tapered portion sets
The damping hole put is the shoulder hole that anterior big rear portion, aperture bore is little, and vertical tube part is located at described first spring rear portion
In.Described second nonreturn valve core includes tapered portion and the cylindrical portion at rear portion, the ring in the middle part of described cylindrical portion of front portion
It is provided with flange, described 3rd spring at front end face abutment flange rear end face around excircle.Described position limiting structure is peace
It is loaded on the elastic spring of valve body inner bore.
In normal operation, the rear end of push rod withstands on elastic spring this pressure safety valve, now
The power of the second spring is greater than the power of the 3rd spring, and such guarantee push rod withstands on elastic spring all the time,
3rd hydraulic fluid port is connected in parallel in hydraulic system, when the 3rd hydraulic fluid port pressure is less than when setting pressure, and fluid can be from second
Chamber enters the first chamber by the damping hole on the first nonreturn valve core, owing in the first chamber, the area of A2 is big
The area of A1 in the second chamber, so the first nonreturn valve core can be crushed to death all the time, now the 3rd hydraulic fluid port and
Two hydraulic fluid port access failures, certain element after the 3rd hydraulic fluid port breaks down, or compression shock occurs, leads
Causing the 3rd hydraulic fluid port pressure when rising rapidly and exceed setting value, the second nonreturn valve core is opened, and fluid enters the 4th
Chamber, because the area of A3 is much larger than the area of A2, now the 4th chamber in the first chamber in the 4th chamber
The power acting on area A3 acts on the power on area A2 much larger than the power of the second spring plus the first chamber,
Effect lower push-rod in active force difference moves forward until withstanding the first nonreturn valve core and being backed down, UNICOM the
Three hydraulic fluid ports and the second hydraulic fluid port, such 3rd hydraulic fluid port pressure can be laid down from the second hydraulic fluid port, simultaneously because the 3rd hydraulic fluid port
Pressure is zero, and the i.e. second chamber pressure is also zero, causes the power acted on the second nonreturn valve core to diminish, the
Two spools are closed the most again, now can be protected in the 4th chamber by pressure, in the 4th chamber
Having an airbag structure, so now the pressure in air bag can keep, push rod may proceed to move forward, and directly pushes up
Ladder shoulder at the 3rd chamber has reached the balance of power, and now the 3rd hydraulic fluid port will join all the time with the second hydraulic fluid port
Logical, cause the 3rd direct oil sump tank of hydraulic fluid port fluid, equipment quits work, until maintainer is by failture evacuation
After, open the 5th hydraulic fluid port (being similar to the fuel outlet of pressure measuring tie-in structure), the fluid of the 4th chamber released,
Laying down therewith of the pressure of the 4th chamber, push rod under the effect of the second spring to reset, the first nonreturn valve core
Will under the effect of the first spring dieback again, equipment can recover normal.Because push rod is guiding valve,
So fluid can leak into the 3rd chamber, pressure can be formed, can be difficult to when push rod moves down mobile, institute
Zero will be always from the 4th direct oil sump tank of hydraulic fluid port, the pressure of such 3rd chamber with the 3rd chamber.
In any case use the valve restarting equipment of this pressure safety type, as long as the pressure of the 4th chamber is not laid down,
First nonreturn valve core is backed down by push rod all the time, and the i.e. the 3rd hydraulic fluid port and the second hydraulic fluid port are UNICOMs, and fluid is straight
Take back fuel tank, pressure would not be produced, danger also would not occur.
Claims (10)
1. a pressure safety valve, it is characterised in that: including valve body, the endoporus front-end and back-end of described valve body are closed,
Being movably equipped with a push rod in valve body inner bore, described valve body inner bore is provided with restriction push rod on rear side of push rod and slides backward
The position limiting structure of dynamic position, is provided with the first nonreturn valve core, described first nonreturn valve core and valve on front side of described push rod
It is provided with the first spring between body front end, between middle part and the valve body inner bore of described push rod, is provided with the second spring, institute
State and on rear side of push rod, be provided with the second nonreturn valve core, between described second nonreturn valve core and valve rear end, be provided with the 3rd bullet
Spring, described first nonreturn valve core and valve body inner bore front portion surround the first chamber, described first nonreturn valve core with push away
Bar front end and valve body inner bore surround the second chamber, surround the 3rd chamber, institute in the middle part of described push rod with valve body inner bore
Stating putting back-end and valve body inner bore rear portion and surround the 4th chamber, corresponding first nonreturn valve core of described valve body is provided with the
Two hydraulic fluid ports, described valve body correspondence push rod front portion is provided with the 3rd hydraulic fluid port, and corresponding 3rd chamber of described valve body is provided with the
Four hydraulic fluid ports, corresponding 4th chamber of described valve body is provided with the 5th hydraulic fluid port, and described second hydraulic fluid port and the 4th hydraulic fluid port connect oil
Case, described 3rd hydraulic fluid port is connected in parallel in hydraulic system, and described 5th hydraulic fluid port is fuel outlet, described first unidirectional
The damping hole that spool is through before and after being provided with, the cross-sectional area of described first chamber is transversal more than the second chamber
Face area, the cross-sectional area of described 4th chamber is more than the cross-sectional area of the second chamber, described 3rd chamber
And the 4th be provided with the holding pressure balanced pressure of push rod in chamber and keep structure.
A kind of pressure safety valve the most according to claim 1, it is characterised in that: described pressure keeps structure bag
Include the air bag being located in the 4th chamber and the first ladder shoulder being located on the 3rd chamber internal perisporium, described push rod
Rear portion is provided with the diameter the first multidiameter portion more than push rod middle front part.
A kind of pressure safety valve the most according to claim 2, it is characterised in that: described air bag is oval knot
Structure and be located at the 3rd spring inner.
A kind of pressure safety valve the most according to claim 2, it is characterised in that: described 3rd chamber internal perisporium
Corresponding second spring is provided with the second ladder shoulder, and described second spring at front end abuts the second ladder and takes on, and described second
Spring rear end abuts the first multidiameter portion front end face.
5. according to a kind of pressure safety valve described in Claims 1-4 any one, it is characterised in that push away described in:
The hole at bar center be anterior diameter is little and shoulder hole that rearward diameter is big, described push rod is before the enlarged diameter section of rear portion
Side is provided with the radial hole connected with aperture.
A kind of pressure safety valve the most according to claim 5, it is characterised in that: described valve body inner bore front end sets
Having plug to block, described valve rear end is provided with valve gap closed valve endoporus.
A kind of pressure safety valve the most according to claim 6, it is characterised in that: threaded on described valve gap
One adjusting rod, described 3rd spring afterbody elastic top is pressed on adjusting rod front end face.
A kind of pressure safety valve the most according to claim 5, it is characterised in that: described first nonreturn valve core bag
Include the tapered portion at rear portion and anterior vertical tube part, the damping hole that described tapered portion is arranged be anterior aperture greatly after
The shoulder hole that portion's bore is little, described first spring rear portion is located in vertical tube part.
A kind of pressure safety valve the most according to claim 5, it is characterised in that: described second nonreturn valve core bag
Include tapered portion and the cylindrical portion at rear portion of front portion, in the middle part of described cylindrical portion, be provided with flange around excircle, described
3rd spring at front end face abutment flange rear end face.
A kind of pressure safety valve the most according to claim 1, it is characterised in that: described position limiting structure is peace
It is loaded on the elastic spring of valve body inner bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546020.9A CN104358902B (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410546020.9A CN104358902B (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104358902A CN104358902A (en) | 2015-02-18 |
| CN104358902B true CN104358902B (en) | 2016-09-28 |
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ID=52526193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410546020.9A Active CN104358902B (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104358902B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693220B (en) * | 2016-12-19 | 2019-09-17 | 国网山东省电力公司荣成市供电公司 | Electric power detects construction safety band hanger |
| CN108561358B (en) * | 2018-01-22 | 2020-05-08 | 威海钰辉机械有限公司 | Differential circuit switching valve and hydraulic differential circuit |
| CN108533763B (en) * | 2018-07-06 | 2021-10-22 | 东营北方石油装备有限公司 | Stop valve with controllable opening and closing speed |
| CN108980133B (en) * | 2018-09-27 | 2019-12-20 | 邵延荣 | Unloading overflow valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2358175C2 (en) * | 2004-07-12 | 2009-06-10 | Тифенбах Контрол Системс Гмбх | Opened check valve |
| CN2708020Y (en) * | 2004-12-07 | 2005-07-06 | 常德信诚液压有限公司 | Balance valve |
| CN101725742A (en) * | 2009-12-11 | 2010-06-09 | 上海诺玛液压系统有限公司 | One-way overflow valve |
| CN102859204A (en) * | 2010-05-17 | 2013-01-02 | 沃尔沃建造设备有限公司 | Pressure control valve |
| CN201753790U (en) * | 2010-07-19 | 2011-03-02 | 浙江苏强格液压有限公司 | Safety valve for multi-way valve |
| CN103363163B (en) * | 2012-03-27 | 2015-06-17 | 上海英威腾工业技术有限公司 | Decompression valve for electro-hydraulic servo injection modeling machine |
| CN204187063U (en) * | 2014-10-15 | 2015-03-04 | 浙江华益机械有限公司 | A kind of pressure safety valve |
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2014
- 2014-10-15 CN CN201410546020.9A patent/CN104358902B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104358902A (en) | 2015-02-18 |
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Address after: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Applicant after: ZHEJIANG HUAYI PRECISION MACHINERY Co.,Ltd. Address before: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Applicant before: ZHEJIANG HUAYI MACHINERY Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG HUAYI MACHINERY CO., LTD. TO: ZHEJIANG HUAYI PRECISION MACHINERY CO., LTD. |
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Address after: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Huayi Precision Machinery Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG HUAYI PRECISION MACHINERY Co.,Ltd. |
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Denomination of invention: A pressure safety valve Effective date of registration: 20211108 Granted publication date: 20160928 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang Huayi Precision Machinery Co.,Ltd. Registration number: Y2021980011835 |
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Date of cancellation: 20230724 Granted publication date: 20160928 Pledgee: Diankou sub branch of Zhejiang Zhuji Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang Huayi Precision Machinery Co.,Ltd. Registration number: Y2021980011835 |
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Effective date of registration: 20230828 Address after: 311800 Diankou Town Industrial Zone, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanshang Zhidi Technology Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: Zhejiang Huayi Precision Machinery Co.,Ltd. |