CN104358902A - Pressure safety valve - Google Patents
Pressure safety valve Download PDFInfo
- Publication number
- CN104358902A CN104358902A CN201410546020.9A CN201410546020A CN104358902A CN 104358902 A CN104358902 A CN 104358902A CN 201410546020 A CN201410546020 A CN 201410546020A CN 104358902 A CN104358902 A CN 104358902A
- Authority
- CN
- China
- Prior art keywords
- chamber
- valve body
- push rod
- valve
- spring
- 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
Links
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 51
- 238000013016 damping Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 208000033999 Device damage Diseases 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001133184 Colletotrichum agaves Species 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 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 pressure safety valve. The safety valve comprises a valve body, wherein a first chamber is formed by a first one-way valve core and the front part of an inner hole of the valve body in a surrounding manner, a second chamber is formed by the first one-way valve core, the front end of a push rod and the inner hole of the valve body in a surrounding manner, third chambers are formed by the middle part of the push rod and the inner hole of the valve body in a surrounding manner, and a fourth chamber is formed by the back end of the push rod and the back part of the inner hole of the valve body in a surrounding manner; second oil holes are formed in the valve body and in positions corresponding to the first one-way valve core, third oil holes are formed in the valve body and in positions corresponding to the front part of the push rod, fourth oil holes are formed in the valve body and in positions corresponding to the third chambers, and a fifth oil hole is formed in the valve body and in a position corresponding to the fourth chamber; the second oil holes and the fourth oil holes are connected with an oil tank, the third oil holes are connected to a hydraulic system in parallel, and the fifth oil hole is an oil outlet; pressure maintenance structures which are used for maintaining the balanced pressure of the push rod are arranged in the third chambers and the fourth chamber. The safety valve disclosed by the invention can prevent pressure impact, prevent equipment from being damaged and improve the security of the equipment.
Description
Technical field
The present invention 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.
Summary of the invention
Technical problem to be solved by this invention 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 present invention 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 present invention 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 invention will be further described:
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiments of the invention are 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 |
|---|---|---|---|
| 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 true CN104358902A (en) | 2015-02-18 |
| CN104358902B CN104358902B (en) | 2016-09-28 |
Family
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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693220A (en) * | 2016-12-19 | 2017-05-24 | 国网山东省电力公司荣成市供电公司 | Electric power detecting construction safety belt hanger |
| CN108533763A (en) * | 2018-07-06 | 2018-09-14 | 佛山信卓派思机械科技有限公司 | It is a kind of to open and close the controllable shut-off valve of speed |
| CN108561358A (en) * | 2018-01-22 | 2018-09-21 | 邵立坤 | A kind of differential circuit switching valve and hydraulic differential circuit |
| CN108980133A (en) * | 2018-09-27 | 2018-12-11 | 邵延荣 | A kind of unloading overflow valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2708020Y (en) * | 2004-12-07 | 2005-07-06 | 常德信诚液压有限公司 | Balance valve |
| WO2006005302A1 (en) * | 2004-07-12 | 2006-01-19 | Tiefenbach Control Systems Gmbh | Releasable non-return 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 |
| 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 |
| EP2573406A1 (en) * | 2010-05-17 | 2013-03-27 | Volvo Construction Equipment AB | Pressure control valve |
| CN103363163A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | 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 |
-
2014
- 2014-10-15 CN CN201410546020.9A patent/CN104358902B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006005302A1 (en) * | 2004-07-12 | 2006-01-19 | Tiefenbach Control Systems Gmbh | Releasable non-return 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 |
| EP2573406A1 (en) * | 2010-05-17 | 2013-03-27 | Volvo Construction Equipment AB | 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 |
| CN103363163A (en) * | 2012-03-27 | 2013-10-23 | 上海御能动力科技有限公司 | 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693220A (en) * | 2016-12-19 | 2017-05-24 | 国网山东省电力公司荣成市供电公司 | Electric power detecting construction safety belt hanger |
| 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 |
| CN108561358A (en) * | 2018-01-22 | 2018-09-21 | 邵立坤 | A kind of differential circuit switching valve and hydraulic differential circuit |
| CN108533763A (en) * | 2018-07-06 | 2018-09-14 | 佛山信卓派思机械科技有限公司 | It is a kind of to open and close the controllable shut-off valve of speed |
| 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 |
| CN108980133A (en) * | 2018-09-27 | 2018-12-11 | 邵延荣 | A kind of unloading overflow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104358902B (en) | 2016-09-28 |
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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. |