CN204187063U - A kind of pressure safety valve - Google Patents
A kind of pressure safety valve Download PDFInfo
- Publication number
- CN204187063U CN204187063U CN201420596067.1U CN201420596067U CN204187063U CN 204187063 U CN204187063 U CN 204187063U CN 201420596067 U CN201420596067 U CN 201420596067U CN 204187063 U CN204187063 U CN 204187063U
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- CN
- China
- Prior art keywords
- chamber
- valve body
- push rod
- hydraulic fluid
- fluid port
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- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of pressure safety valve, comprise valve body, first nonreturn valve core and valve body inner bore front portion surround the first chamber, described first nonreturn valve core and push rod front end and valve body inner bore surround the second chamber, the 3rd chamber is surrounded 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, the corresponding push rod front portion of described valve body 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, the pressure balanced pressure holding structure of maintenance push rod is provided with in described 3rd chamber and the 4th chamber.The utility model can prevent compression shock, prevents device damage, improves device security.
Description
Technical field
The utility model relates to valve.
Background technique
At present in hydraulic system, in solution overpressure, or during compression shock, great majority adopt pressure safety type relief valve to carry out protective system, or add unloading electromagnetic valve with pressure relay.
Adopt the scheme of pressure safety type relief valve or decompression relief valve, in any case system is in the impact that is under pressure; with when breaking down; before fault is not got rid of when equipment is restarted, pressure can re-establish, and the element now will protected or employee also can be dangerous.
The pressure relay adopted adds unloading electromagnetic valve scheme, when set by pressure Overpressure of a safety valve relay during definite value, relay open pipe is connected, unloading electromagnetic valve obtains electric, is released by pressure, but this scheme has above-mentioned defect, namely when electric power of equipment is restarted, pressure can rise again, until just can off-load again when reaching the setting pressure of pressure relay, and this scheme be a kind of scheme of many valve combinations, compares when mounted and takes up room.
Model utility content
Technical problem to be solved in the utility model is just to provide a kind of pressure safety valve, and compact structure, prevents compression shock, prevents device damage, improves device security.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of pressure safety valve, comprise valve body, the endoporus front-end and back-end of described valve body are closed, a push rod is movably equipped with in valve body inner bore, described valve body inner bore is provided with the limit structure that restriction push rod slides backward position on rear side of push rod, the first nonreturn valve core is provided with on front side of described push rod, the first spring is provided with between described first nonreturn valve core and valve body front end, the second spring is provided with between the middle part of described push rod and valve body inner bore, the second nonreturn valve core is provided with on rear side of described push rod, the 3rd spring is provided with between described second nonreturn valve core and valve rear end, described first nonreturn valve core and valve body inner bore front portion surround the first chamber, described first nonreturn valve core and push rod front end and valve body inner bore surround the second chamber, the 3rd chamber is surrounded 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, the corresponding push rod front portion of described valve body 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, damping hole through before and after described first nonreturn valve core is provided with, the cross sectional area of described first chamber is greater than the cross sectional area of the second chamber, the cross-section area of described 4th chamber is greater than the cross sectional area of the second chamber, the pressure balanced pressure holding structure of maintenance push rod is provided with in described 3rd chamber and the 4th chamber.
Preferably, described pressure holding structure comprises the air bag be located in the 4th chamber and the first ladder shoulder be located on the 3rd chamber inner circle wall, and described push rod rear portion is provided with the first multidiameter shaft portion that diameter is greater than push rod middle front part.
Preferably, described air bag is ellipsoidal structure and is located at the 3rd spring inner.
Preferably, corresponding second spring of described 3rd chamber inner circle wall is provided with the second ladder shoulder, and described second spring at front end abuts the second ladder shoulder, and described second spring rear end abuts the first multidiameter shaft portion front-end face.
Preferably, the hole at described push rod center is that anterior diameter is little and the shoulder hole that rear portion diameter is large, and described push rod is provided with the radial hole be communicated 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 shutoff, and described valve rear end is provided with valve gap closed valve endoporus.
Preferably, described valve gap is threaded an adjustable lever, and described 3rd spring afterbody elastic top is pressed on adjustable lever front-end face.
Preferably, described first nonreturn valve core comprises the tapered portion at rear portion and anterior vertical tube part, and the damping hole that described tapered portion is arranged is the shoulder hole that large rear portion, anterior aperture bore is little, and described first spring rear portion is located in vertical tube part.
Preferably, described second nonreturn valve core comprises anterior tapered portion and the cylindrical portion at rear portion, is provided with flange, described 3rd spring at front end face abutment flange ear end face in the middle part of described cylindrical portion around excircle.
Preferably, described limit structure is the Steel Cable Baffle Ring being installed on valve body inner bore.
The utility model adopts technique scheme, when there is card valve or compression shock in equipment, pressure can raise, when pressure exceedes setting value, return opening is opened, fluid is made directly to get back to fuel tank, system pressure is classified as zero, valve inner push rod one end pressure one-way valve maintains, if so fault is not got rid of, no matter how starting device, do not have pressure, now all executive components are all idle, which reduces danger, thus compression shock can be prevented, prevent device damage, improve device security, be useful in press, among the adventurous equipment such as injection machine.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is structural representation of the present utility model.
Embodiment
Embodiment of the present utility model is illustrated below in conjunction with Fig. 1.A kind of pressure safety valve, comprise valve body 1, the endoporus front-end and back-end of described valve body 1 are closed, a push rod 3 is movably equipped with in valve body 1 endoporus, described valve body inner bore is provided with the limit structure that restriction push rod slides backward position on rear side of push rod 3, the first nonreturn valve core 2 is provided with on front side of described push rod, the first spring 21 is provided with between described first nonreturn valve core and valve body front end, the second spring 31 is provided with between the middle part of described push rod and valve body inner bore, the second nonreturn valve core 4 is provided with on rear side of described push rod, the 3rd spring 41 is provided with between described second nonreturn valve core and valve rear end, described first nonreturn valve core and valve body inner bore front portion surround the first chamber 11, described first nonreturn valve core and push rod front end and valve body inner bore surround the second chamber 12, the 3rd chamber 13 is surrounded 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 14, corresponding first nonreturn valve core of described valve body is provided with the second hydraulic fluid port 102, the corresponding push rod front portion of described valve body is provided with the 3rd hydraulic fluid port 103, 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, described 3rd hydraulic fluid port is connected in parallel in hydraulic system, described 5th hydraulic fluid port is fuel outlet, the center of described first nonreturn valve core and push rod is equipped with the through damping hole in front and back, the cross sectional area of described first chamber is greater than the cross sectional area of the second chamber, the cross-section area of described 4th chamber is greater than the cross sectional area of the second chamber, the pressure balanced pressure holding structure of maintenance push rod is provided with in described 3rd chamber and the 4th chamber.
Described pressure holding structure comprises the air bag 5 be located in the 4th chamber and the first ladder shoulder be located on the 3rd chamber inner circle wall, and described push rod rear portion is provided with the first multidiameter shaft portion that diameter is greater than push rod middle front part.Described air bag is ellipsoidal structure and is located at the 3rd spring inner.Corresponding second spring of described 3rd chamber inner circle wall is provided with the second ladder shoulder, and described second spring at front end abuts the second ladder shoulder, and described second spring rear end abuts the first multidiameter shaft portion front-end face.The hole at described push rod center is that anterior diameter is little and the shoulder hole that rear portion diameter is large, and described push rod is provided with the radial hole be communicated with aperture on front side of the enlarged diameter section of rear portion.Described valve body inner bore front end is provided with the first hydraulic fluid port 101, and this first hydraulic fluid port is by plug shutoff, and described valve rear end is provided with valve gap closed valve endoporus.Described valve gap is threaded an adjustable lever 6, and described 3rd spring afterbody elastic top is pressed on adjustable lever front-end face.Described first nonreturn valve core comprises the tapered portion at rear portion and anterior vertical tube part, and the damping hole that described tapered portion is arranged is the shoulder hole that large rear portion, anterior aperture bore is little, and described first spring rear portion is located in vertical tube part.Described second nonreturn valve core comprises anterior tapered portion and the cylindrical portion at rear portion, is provided with flange, described 3rd spring at front end face abutment flange ear end face in the middle part of described cylindrical portion around excircle.Described limit structure is the Steel Cable Baffle Ring being installed on valve body inner bore.
This pressure safety valve in normal operation, the rear end of push rod withstands on Steel Cable Baffle Ring, now the power of the second spring is greater than the power of the 3rd spring, such guarantee push rod withstands on Steel Cable Baffle Ring all the time, 3rd hydraulic fluid port is connected in parallel in hydraulic system, when the 3rd hydraulic fluid port pressure is less than setting pressure, fluid can enter the first chamber from the second chamber by the damping hole the first nonreturn valve core, because in the first chamber, the area of A2 is greater than 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 the second hydraulic fluid port access failure, certain element after the 3rd hydraulic fluid port breaks down, or there is compression shock, when causing the 3rd hydraulic fluid port pressure rise rapidly and exceed setting value, second nonreturn valve core is opened, fluid enters the 4th chamber, because the area of A3 is much larger than the area of A2 in the first chamber in the 4th chamber, now much larger than the power of the second spring, the 4th chamber power that acts on area A 3 adds that the first chamber acts on the power in area A 2, move forward at the effect lower push-rod of active force difference until withstand the first nonreturn valve core and backed down, UNICOM the 3rd hydraulic fluid port 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, namely the second chamber pressure is also zero, the power acted on the second nonreturn valve core is caused to diminish, second spool is closed again under spring force, now pressure can be protected in the 4th chamber, an airbag structure is had in 4th chamber, so the pressure now in air bag can keep, push rod can continue to move forward, straight top reaches equilibrium of forces to the ladder shoulder at the 3rd chamber place, now the 3rd hydraulic fluid port will with the second hydraulic fluid port UNICOM all the time, cause the direct oil sump tank of the 3rd hydraulic fluid port fluid, equipment quits work, until maintenance man is by after failture evacuation, open the 5th hydraulic fluid port (being similar to the fuel outlet of pressure measuring tie-in structure), the fluid of the 4th chamber is released, thereupon laying down of the pressure of the 4th chamber, push rod under the effect of the second spring to reset, 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, meeting mineralization pressure, can be difficult to mobile when push rod moves down, so the 3rd chamber is from the direct oil sump tank of the 4th hydraulic fluid port, the pressure of such 3rd chamber will be always zero.
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, the first nonreturn valve core backs down by push rod all the time, namely the 3rd hydraulic fluid port and the second hydraulic fluid port are UNICOMs, the direct oil sump tank of fluid, would not produce pressure, also would not occur danger.
Claims (10)
1. a pressure safety valve, it is characterized in that: comprise valve body, the endoporus front-end and back-end of described valve body are closed, a push rod is movably equipped with in valve body inner bore, described valve body inner bore is provided with the limit structure that restriction push rod slides backward position on rear side of push rod, the first nonreturn valve core is provided with on front side of described push rod, the first spring is provided with between described first nonreturn valve core and valve body front end, the second spring is provided with between the middle part of described push rod and valve body inner bore, the second nonreturn valve core is provided with on rear side of described push rod, the 3rd spring is provided with between described second nonreturn valve core and valve rear end, described first nonreturn valve core and valve body inner bore front portion surround the first chamber, described first nonreturn valve core and push rod front end and valve body inner bore surround the second chamber, the 3rd chamber is surrounded 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, the corresponding push rod front portion of described valve body 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, damping hole through before and after described first nonreturn valve core is provided with, the cross sectional area of described first chamber is greater than the cross sectional area of the second chamber, the cross-section area of described 4th chamber is greater than the cross sectional area of the second chamber, the pressure balanced pressure holding structure of maintenance push rod is provided with in described 3rd chamber and the 4th chamber.
2. a kind of pressure safety valve according to claim 1, it is characterized in that: described pressure holding structure comprises the air bag be located in the 4th chamber and the first ladder shoulder be located on the 3rd chamber inner circle wall, and described push rod rear portion is provided with the first multidiameter shaft portion that diameter is greater than push rod middle front part.
3. a kind of pressure safety valve according to claim 2, is characterized in that: described air bag is ellipsoidal structure and is located at the 3rd spring inner.
4. a kind of pressure safety valve according to claim 2, it is characterized in that: corresponding second spring of described 3rd chamber inner circle wall is provided with the second ladder shoulder, described second spring at front end abuts the second ladder shoulder, and described second spring rear end abuts the first multidiameter shaft portion front-end face.
5. a kind of pressure safety valve according to Claims 1-4 any one, it is characterized in that: the hole at described push rod center is that anterior diameter is little and the shoulder hole that rear portion diameter is large, and described push rod is provided with the radial hole be communicated with aperture on front side of the enlarged diameter section of rear portion.
6. a kind of pressure safety valve according to claim 5, it is characterized in that: described valve body inner bore front end is provided with plug shutoff, described valve rear end is provided with valve gap closed valve endoporus.
7. a kind of pressure safety valve according to claim 6, is characterized in that: described valve gap is threaded an adjustable lever, and described 3rd spring afterbody elastic top is pressed on adjustable lever front-end face.
8. a kind of pressure safety valve according to claim 5, it is characterized in that: described first nonreturn valve core comprises the tapered portion at rear portion and anterior vertical tube part, the damping hole that described tapered portion is arranged is the shoulder hole that large rear portion, anterior aperture bore is little, and described first spring rear portion is located in vertical tube part.
9. a kind of pressure safety valve according to claim 5, it is characterized in that: described second nonreturn valve core comprises anterior tapered portion and the cylindrical portion at rear portion, flange is provided with around excircle, described 3rd spring at front end face abutment flange ear end face in the middle part of described cylindrical portion.
10. a kind of pressure safety valve according to claim 1, is characterized in that: described limit structure is the Steel Cable Baffle Ring being installed on valve body inner bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596067.1U CN204187063U (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596067.1U CN204187063U (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204187063U true CN204187063U (en) | 2015-03-04 |
Family
ID=52619065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420596067.1U Withdrawn - After Issue CN204187063U (en) | 2014-10-15 | 2014-10-15 | A kind of pressure safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204187063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358902A (en) * | 2014-10-15 | 2015-02-18 | 浙江华益机械有限公司 | Pressure safety valve |
| CN105806603A (en) * | 2016-03-16 | 2016-07-27 | 北京宇航系统工程研究所 | Pilot safety valve testing system and method |
-
2014
- 2014-10-15 CN CN201420596067.1U patent/CN204187063U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358902A (en) * | 2014-10-15 | 2015-02-18 | 浙江华益机械有限公司 | Pressure safety valve |
| CN105806603A (en) * | 2016-03-16 | 2016-07-27 | 北京宇航系统工程研究所 | Pilot safety valve testing system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG HUAYI PRECISION MACHINERY CO., LTD. Free format text: FORMER NAME: ZHEJIANG HUAYI MACHINERY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Patentee after: ZHEJIANG HUAYI PRECISION MACHINERY CO., LTD. Address before: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Patentee before: Zhejiang Huayi Machinery Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160928 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |