CN110030425A - Rapid opening pressure relief valve - Google Patents
Rapid opening pressure relief valve Download PDFInfo
- Publication number
- CN110030425A CN110030425A CN201910412457.6A CN201910412457A CN110030425A CN 110030425 A CN110030425 A CN 110030425A CN 201910412457 A CN201910412457 A CN 201910412457A CN 110030425 A CN110030425 A CN 110030425A
- Authority
- CN
- China
- Prior art keywords
- valve
- base
- hole
- electromagnet
- valve cover
- 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.)
- Withdrawn
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000005389 magnetism Effects 0.000 claims abstract description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 3
- 210000002683 foot Anatomy 0.000 description 14
- 230000006378 damage Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013022 venting Methods 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
A kind of Rapid opening pressure relief valve, belongs to releasing pressure automatically equipment technical field.Including valve base, valve cover, electromagnet, pressure sensor and PLC.It is realized by open-and-close mechanism and is connect with the folding of valve base in one end of the valve cover, a pair of catches is arranged in the other end of corresponding open-and-close mechanism in the valve cover, the intermediate setting for latching in front end is cored, the electromagnet setting is on valve base and corresponding with iron core, the PLC controls electromagnet according to the pressure data that pressure sensor detects and is powered or powers off, electromagnet pull-core when being powered, cover tightly valve cover to valve base, electromagnet then loses magnetism when power is off, valve cover is opened by the pressure in pressure release passage at this time.Advantage: may be implemented discouraged, pressure release of rapidly uncapping, and avoid exploding due to air pressure is excessive in cabin, safety is improved；It can be reused after the completion of pressure release work, greatly reduce the waste of resource and article.
Description
Technical field
The invention belongs to releasing pressure automatically equipment technical fields, and in particular to a kind of Rapid opening pressure relief valve.
Background technique
Rapid opening pressure relief valve reaches protection and sets for opening lid quickly when equipment air pressure is excessively high to discharge air pressure
Purpose that is standby and preventing personnel from coming to harm.General pressure release opening device needs to consider production requirement, equipment pressure, venting of dust explosion frequency
The factors such as rate, perishable or degree of aging, service life, environment temperature and installation site are selected.For not having
For the field of employment that the particular surroundings such as heat preservation, moisturizing require, with the efficiency highest of Rapid opening pressure relief valve and most economical, together
When can also reuse.
Previous old pressure relief equipment has several: the first is disposable products, using way the most traditional, is being used
When, when pressure reach meet pressure release uncap condition numerical value when, need to destroy surface lid carry out pressure release.This method is present
Substantially it is not used, reason is that the destruction of lid will lead to resource and largely waste, and there is very big security risk, if pressure
Power cannot uncap in time when reaching a certain level, and can set off an explosion.Second is controlled using the pressure of gas or liquid
It uncaps pressure release, however once for a long time, gases used or liquid can corrode some components of cap-opening mechanism, cause equipment damage.
In view of above-mentioned prior art, it is necessary to be improved the structure of existing pressure relief mechanism of uncapping.For this purpose, the application
People has made beneficial design, and technical solution described below generates in this background.
Summary of the invention
The purpose of the present invention is to provide a kind of safe and stable Rapid opening pressure relief valves.
The purpose of the present invention is in this way to reach, a kind of Rapid opening pressure relief valve, including valve base and valve cover,
It is realized by open-and-close mechanism and is connect with the folding of valve base in one end of the valve cover, it is characterised in that further include electromagnetism
Iron, pressure sensor and PLC, the valve base form pressure release passage in centre, and the valve cover lid is located at valve
The top of pedestal, for covering the pressure release passage, the open-and-close mechanism includes a pair of of axis pin base, a pin shaft, a pair of of pressure
Foot and a pair of of reset spring, are arranged in a pair of of axis pin base parallel surface opposite one end edge of valve base, institute
The pin shaft stated is mounted on a pair of of axis pin base, and pin shaft offers several spring first positioning holes in middle part compartment of terrain, and described one
The left and right ends for being set in pin shaft by being provided with the mounting hole of end to presser feet, the front end of presser feet and valve cover are fixedly mounted,
Presser feet offers spring second location hole in the position by proximal end, and a pair of of reset spring is set on pin shaft, respectively
Positioned at the inside of a pair of of presser feet, one end of reset spring is fixed in the spring second location hole of nearest side pressure foot, and the other end is solid
It is scheduled in the spring first positioning hole with regard to nearside pin shaft, other end setting a pair of of lock of the valve cover in corresponding open-and-close mechanism
Button, the front end of lock protrude from the edge of valve cover, and the intermediate setting for latching in front end is cored, and the electromagnet setting exists
On valve base and corresponding with iron core, the PLC controls electromagnet according to the pressure data that pressure sensor detects
It is powered or power-off, electromagnet pull-core when being powered covers tightly valve cover to valve base, electromagnet then loses when power is off
Magnetism is gone, valve cover is opened by the pressure in pressure release passage at this time.
In a specific embodiment of the invention, the centre for latching in front end open up from upper surface penetrate through to
The diameter of the through-hole of lower surface, the through-hole gradually tapers up from top to bottom, and the iron core forms protrusion in upper end, described
The diameter of protrusion is gradually tapered up from top to bottom and is adapted with through-hole, and the lower end of iron core extends downwardly and lean out through-hole, works as valve
When door closure is bonded on valve base and electromagnet is powered, in the centre bore of the lower end insertion of the iron core electromagnet, with electromagnetism
Iron is attracted, and the top of the through-hole is also covered with baffle.
In another specific embodiment of the invention, the axis pin base opens up screw hole, the valve in bottom
Pedestal is equipped with the screw for being adapted to installation with the screw hole in the position of corresponding axis pin base.
In another specific embodiment of the invention, a pair of of axis pin base offers confession in interior side Face to face
The pin shaft hole that the end of the pin shaft plugs, axis pin base open up the limit hole being connected to the pin shaft hole at top again, limit
Position is provided with banking pin in hole, and the bottom of banking pin contacts on pin shaft, fastens to pin shaft.
In another specific embodiment of the invention, the presser feet is fixedly mounted by screw and valve cover.
Of the invention there are one in specific embodiment, the valve base includes under pedestal upper piece and pedestal
Piece, the pedestal upper piece and pedestal bottom sheet consistency from top to bottom are arranged, and constitute the pressure release passage, the pedestal intermediate
Upper piece form a circle in the surrounding projection of corresponding pressure release passage and exist for be adapted to the surrounding edge installed, valve cover with the valve cover
Bottom opens up the groove for surrounding edge insertion towards the valve base, is embedded with sealing ring in the groove.
The present invention compared with prior art, has the beneficial effect that air pressure in cabin due to the above structure,
One time passed to PLC by pressure sensor, by PLC control electromagnet to realize discouraged, pressure release of rapidly uncapping, avoid because
Air pressure is excessive and explode in cabin, and safety has obtained comprehensive promotion；It can be reused after the completion of pressure release work, significantly
Reduce the waste of resource and article；Long service life will not be nothing because of some other components agings or damage
Method works normally.
Detailed description of the invention
Fig. 1 is structural exploded view of the invention.
In figure: 1. valve bases, 11. pedestals upper piece, 111. surrounding edges, 12. pedestal bottom sheet, 13. pressure release passages；2. valve
Lid, 21. grooves, 22 sealing rings；3. open-and-close mechanism, 31. axis pin bases, 311. screw holes, 312. pin shaft holes, 313. limit holes, 314.
Banking pin, 32. pin shafts, 321. spring first positioning holes, 33. presser feets, 331. mounting holes, 332. spring second location holes, 34. are answered
Position spring；4. electromagnet, 41. centre bores；5. lock, 51. through-holes, 52. baffles；6. iron core, 61. protrusions；, 7. screws.
Specific embodiment
Detailed description of specific embodiments of the present invention with reference to the accompanying drawing, but is not to technology to the description of embodiment
The limitation of scheme, any design according to the present invention, which changes in the form rather than substance, all should be considered as protection scope of the present invention.
Referring to Fig. 1, the present invention relates to a kind of Rapid opening pressure relief valve, including valve base 1, valve cover 2, electromagnet
4, realize that the folding with valve base 1 connects by open-and-close mechanism 3 in one end of pressure sensor and PLC, the valve cover 2
It connects.The valve base 1 includes pedestal upper piece 11 and pedestal bottom sheet 12, and in the centre of pedestal upper piece 11 and pedestal bottom sheet 12
Form pressure release passage 13.The pedestal upper piece 11 the surrounding projection of corresponding pressure release passage 13 formed a circle for it is described
The surrounding edge 111 of the adaptation installation of valve cover 2, the valve cover 2 cover the top for being located at valve base 1, for covering described let out
Pressure passageway 13, valve cover 2 open up the groove 21 being embedded in for surrounding edge 111, the groove in bottom towards the valve base 1
Sealing ring 22 is embedded in 21, for guaranteeing the sealed connection between valve cover 2 and valve base 1.To guarantee good intensity,
The valve base 1 and valve cover 2 is all made by A3 steel.The open-and-close mechanism 3 includes that a pair of of axis pin base 31, one is sold
Axis 32, a pair of of presser feet 33 and a pair of of reset spring 34.Valve bottom is arranged in a pair of of axis pin base 31 Face to face in parallel
One end edge of seat 1, axis pin base 31 open up screw hole 311 in bottom, and the valve base 1 is in the position of corresponding axis pin base 31
Screw 7 for being adapted to installation with the screw hole 311 is installed.The pin shaft 32 is mounted on a pair of of axis pin base 31, a pair of
Axis pin base 31 offers the pin shaft hole 312 plugged for the end of the pin shaft 32 on medial surface opposite, and axis pin base 31 exists again
Top opens up the limit hole 313 being connected to the pin shaft hole 312, and banking pin 314, banking pin 314 are provided in limit hole 313
Bottom contact on pin shaft 32, pin shaft 32 is fastened.Pin shaft 32, which offers several springs first in middle part compartment of terrain, to be determined
Position hole 321, the left and right ends that a pair of of presser feet 33 is set in pin shaft 32 by being provided with the mounting hole 331 of end, presser feet
33 front end is fixedly mounted by screw and valve cover 2, and presser feet 33 offers spring second location hole in the position by proximal end
332, a pair of of reset spring 34 is set on pin shaft 32, is located at the inside of a pair of of presser feet 33.Reset spring 34
One end is fixed in the spring second location hole 332 of nearest side pressure foot 33, and the other end is fixed on the spring with regard to nearside pin shaft 32
In a positioning hole 321.A pair of catches 5 is arranged in the other end of corresponding open-and-close mechanism 3 in the valve cover 2, latches 5 preceding distal process
For the edge of valve cover 2, lock 5 is in the intermediate setting cored 6 of front end, and the setting of electromagnet 4 is on valve base 1
And it is corresponding with iron core 6.The lock 5 is opened up from upper surface in the centre of front end and is penetrated through to the through-hole 51 of lower surface, described
The diameter of through-hole 51 gradually taper up from top to bottom, the iron core 6 forms protrusion 61, the diameter of the protrusion 61 in upper end
It gradually tapers up and is adapted with through-hole 51 from top to bottom, the lower end of iron core 6 extends downwardly and lean out through-hole 51, when valve cover 2
When being bonded on valve base 1, in the centre bore 41 of the lower end insertion of iron core 6 electromagnet 4, it is attracted with electromagnet 4, it is described
The top of through-hole 51 be also covered with baffle 52.The PLC controls electricity according to the pressure data that pressure sensor detects
Magnet 4 is powered or power-off, and the pull-core 6 when being powered of electromagnet 4 covers tightly valve cover 2 to valve base 1, electromagnet 4 exists
It then loses magnetism when power-off, valve cover 2 is opened by the pressure in pressure release passage 13 at this time.In the present embodiment, described
Electromagnet 4 uses H5030-24V, and the pressure sensor uses HZPS1-D-1-A, the PLC to use CPU 222CN.
The present invention can be used for the unlatching of the pressure chambers such as ship, submarine.Using when described in pedestal upper piece 11 and pedestal bottom sheet
12 are divided into the upper side and lower side of pressure chamber pressure relief opening in up and down alignment, by several between pedestal upper piece 11 and pedestal bottom sheet 12
Screw fastening.The pressure sensor is set in cabin, and for monitoring air pressure in cabin, the PLC is mounted in monitoring room.
The installation of pressure sensor and PLC are existing many open therefore not shown in attached drawing, also omit and specifically repeat.When in cabin
When air pressure reaches preset threshold value, pressure sensor passes data to PLC, is powered off by PLC control electromagnet 4, at this time in cabin
Air pressure opens valve cover 2, achievees the purpose that quick pressure releasing.
Claims (6)
1. one end of a kind of Rapid opening pressure relief valve, including valve base (1) and valve cover (2), the valve cover (2) is logical
It crosses open-and-close mechanism (3) realization to connect with the folding of valve base (1), it is characterised in that further include electromagnet (4), pressure sensor
And PLC, the valve base (1) form pressure release passage (13) in centre, the valve cover (2) lid is located at valve base
(1) top, for covering the pressure release passage (13), the open-and-close mechanism (3) includes a pair of of axis pin base (31), a pin
Axis (32), a pair of of presser feet (33) and a pair of of reset spring (34), a pair of of axis pin base (31) are arranged Face to face in parallel
In one end edge of valve base (1), the pin shaft (32) is mounted on a pair of of axis pin base (31), and pin shaft (32) is at middle part
Compartment of terrain offers several spring first positioning holes (321), and a pair of of presser feet (33) is by being provided with the mounting hole of end
(331) left and right ends of pin shaft (32) are set in, the front end and valve cover (2) of presser feet (33) are fixedly mounted, and presser feet (33) is leaning on
The position of proximal end offers spring second location hole (332), and a pair of of reset spring (34) is set on pin shaft (32),
It is located at the inside of a pair of of presser feet (33), the spring second that one end of reset spring (34) is fixed on nearest side pressure foot (33) is fixed
In position hole (332), the other end is fixed in the spring first positioning hole (321) with regard to nearside pin shaft (32), the valve cover (2)
The other end in corresponding open-and-close mechanism (3) is arranged a pair of catches (5), and the front end of lock (5) protrudes from the edge of valve cover (2),
It latches (5) and cored (6) is set in the intermediate of front end, the electromagnet (4) is arranged on valve base (1) and and iron core
(6) corresponding, the PLC controls electromagnet (4) according to the pressure data that pressure sensor detects and is powered or powers off, electricity
Magnet (4) pull-core (6) when being powered, covers tightly valve cover (2) on valve base (1), and electromagnet (4) is when power is off then
It loses magnetism, valve cover (2) is opened by the pressure in pressure release passage (13) at this time.
2. Rapid opening pressure relief valve according to claim 1, it is characterised in that centre of the lock (5) in front end
It opens up and is penetrated through from upper surface to the through-hole of lower surface (51), the diameter of the through-hole (51) gradually tapers up from top to bottom, described
Iron core (6) upper end formed protrusion (61), the diameter of the protrusion (61) gradually tapers up from top to bottom and and through-hole
(51) be adapted, the lower end of iron core (6) extends downwardly and leans out through-hole (51), be bonded on valve base (1) when valve cover (2) and
When electromagnet (4) is powered, in the centre bore (41) of the lower end insertion of iron core (6) electromagnet (4), inhaled with electromagnet (4)
It closes, the top of the through-hole (51) is also covered with baffle (52).
3. Rapid opening pressure relief valve according to claim 1, it is characterised in that the axis pin base (31) is opened in bottom
If screw hole (311), the valve base (1) the position of corresponding axis pin base (31) be equipped with for the screw hole (311)
It is adapted to the screw (7) of installation.
4. Rapid opening pressure relief valve according to claim 1, it is characterised in that including a pair of of axis pin base (31)
Side offers the pin shaft hole (312) plugged for the end of the pin shaft (32) Face to face, and axis pin base (31) is opened at top again
If the limit hole (313) being connected to the pin shaft hole (312), banking pin (314), banking pin are provided in limit hole (313)
(314) bottom contacts on pin shaft (32), fastens to pin shaft (32).
5. Rapid opening pressure relief valve according to claim 1, it is characterised in that the presser feet (33) by screw with
Valve cover (2) is fixedly mounted.
6. Rapid opening pressure relief valve according to claim 1, it is characterised in that the valve base (1) includes pedestal
Upper piece (11) and pedestal bottom sheet (12), the pedestal upper piece (11) and the setting of pedestal bottom sheet (12) consistency from top to bottom, and in centre
The pressure release passage (13) is constituted, surrounding projection of the pedestal upper piece (11) in corresponding pressure release passage (13) forms a circle
For being adapted to the surrounding edge (111) of installation with the valve cover (2), valve cover (2) is in bottom towards the valve base (1)
The groove (21) for surrounding edge (111) insertion is opened up, is embedded with sealing ring (22) in the groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412457.6A CN110030425A (en) | 2019-05-17 | 2019-05-17 | Rapid opening pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412457.6A CN110030425A (en) | 2019-05-17 | 2019-05-17 | Rapid opening pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110030425A true CN110030425A (en) | 2019-07-19 |
Family
ID=67242469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910412457.6A Withdrawn CN110030425A (en) | 2019-05-17 | 2019-05-17 | Rapid opening pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110030425A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536296A (en) * | 2020-04-14 | 2020-08-14 | 东风汽车集团有限公司 | Electromagnetic type automobile body relief valve and automobile |
| CN111624373A (en) * | 2020-07-01 | 2020-09-04 | 强一半导体（苏州）有限公司 | Magnetic pressure relief structure for power device test probe card and installation and calibration method thereof |
| CN115007583A (en) * | 2022-05-24 | 2022-09-06 | 李红 | Intelligent secondary water supply equipment |
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| US20090248210A1 (en) * | 2008-02-01 | 2009-10-01 | Industria De Plasticos Andes Drip Limitada | Time pulse pilot for pressure regulating control valve |
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| CN209856470U (en) * | 2019-05-17 | 2019-12-27 | 常熟市海舟电气有限公司 | Quick-opening pressure relief valve |
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|---|---|---|---|---|
| US20090248210A1 (en) * | 2008-02-01 | 2009-10-01 | Industria De Plasticos Andes Drip Limitada | Time pulse pilot for pressure regulating control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111624373B (en) * | 2020-07-01 | 2021-02-02 | 强一半导体（苏州）有限公司 | Magnetic pressure relief structure for power device test probe card and installation and calibration method thereof |
| CN112649630A (en) * | 2020-07-01 | 2021-04-13 | 强一半导体（苏州）有限公司 | Installation method of magnetic pressure relief structure for power device test probe card |
| CN112698064A (en) * | 2020-07-01 | 2021-04-23 | 强一半导体（苏州）有限公司 | Calibration method of magnetic pressure relief structure for power device test probe card |
| CN112649630B (en) * | 2020-07-01 | 2022-08-16 | 强一半导体（苏州）有限公司 | Installation method of magnetic pressure relief structure for power device test probe card |
| CN112698064B (en) * | 2020-07-01 | 2022-08-16 | 强一半导体（苏州）有限公司 | Calibration method of magnetic pressure relief structure for power device test probe card |
| CN115007583A (en) * | 2022-05-24 | 2022-09-06 | 李红 | Intelligent secondary water supply equipment |
| CN115007583B (en) * | 2022-05-24 | 2024-06-14 | 迈勒科(杭州)环保科技有限公司 | Intelligent secondary water supply equipment |
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Application publication date: 20190719 |