CN112728126A - Piston type electromagnetic valve opened without differential pressure - Google Patents
Piston type electromagnetic valve opened without differential pressure Download PDFInfo
- Publication number
- CN112728126A CN112728126A CN202011572117.9A CN202011572117A CN112728126A CN 112728126 A CN112728126 A CN 112728126A CN 202011572117 A CN202011572117 A CN 202011572117A CN 112728126 A CN112728126 A CN 112728126A
- Authority
- CN
- China
- Prior art keywords
- branch pipe
- piston
- air chamber
- valve body
- pipe
- 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.)
- Pending
Links
Images
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
- F16K1/14—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 ball-shaped valve member
-
- 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
- F16K1/32—Details
-
- 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
- F16K31/0665—Lift valves with valve member being at least partially ball-shaped
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a piston type electromagnetic valve opened without pressure difference, which comprises a valve body, wherein an air inlet pipe and an air outlet pipe which are controlled to be opened and closed by a piston are arranged in the valve body, a first branch pipe, a second branch pipe, a third air chamber, a first air chamber and a second air chamber are respectively arranged in the valve body on the upper side and the lower side of the piston, and a valve core structure which is used for controlling the opening and the closing among the first branch pipe, the second branch pipe and the third branch pipe is arranged in the third air chamber. The valve core structure controls the opening and closing of the three branch pipes of the first branch pipe, the second branch pipe and the third branch pipe, and when the electromagnetic valve is opened, the first air chamber, the second air chamber and the third air chamber are communicated, so that the technical performance of no-pressure-difference opening and closing is achieved.
Description
Technical Field
The invention relates to an electromagnetic valve, in particular to a piston type electromagnetic valve capable of being opened without pressure difference.
Background
The solenoid valve is a very critical executing component for automatic control of a pipeline system, and particularly, opening and closing of the solenoid valve in a refrigeration system often requires opening and closing of a coil control pipeline to realize opening and closing of the solenoid valve. In the prior art, a pressure difference exists between air chambers for controlling the opening and closing of the air inlet pipe and the air outlet pipe in the opening and closing process of the electromagnetic valve, particularly the pressure difference is caused by the fact that the air chamber in the valve body cannot be emptied in the opening process, so that a piston cannot be completely opened (the gravity of the piston is ignored), certain pressure loss exists, and the pressure loss is not allowed to exist particularly in some fields with higher precision requirements. How to solve the above technical problems and realize a solenoid valve with less pressure loss and no pressure difference between air chambers has been the subject of research by those skilled in the art.
Disclosure of Invention
The invention provides a piston type non-differential pressure opening electromagnetic valve with no differential pressure between air chambers in an opening state and small pressure loss.
A piston type electromagnetic valve which is opened without pressure difference comprises a valve body, wherein an air inlet pipe and an air outlet pipe which are controlled to be opened and closed by a piston are arranged in the valve body, a first air chamber and a second air chamber are respectively arranged in the valve body on the upper side and the lower side of the piston, and the first air chamber is communicated with the air inlet pipe; the valve body is respectively provided with a first branch pipe, a second branch pipe, a third branch pipe and a third air chamber, one end of the first branch pipe is communicated with the first air chamber, the other end of the first branch pipe is communicated with the third air chamber, one end of the second branch pipe is communicated with the second air chamber, the other end of the second branch pipe is communicated with the third air chamber, one end of the third branch pipe is communicated with the air outlet pipe, and the other end of the third branch pipe is communicated with; and a valve core structure for controlling the opening and closing among the first branch pipe, the second branch pipe and the third branch pipe is arranged in the third air chamber. This kind of solenoid valve structure passes through the switching of the three bronchus of case structure control first branch pipe, second branch pipe, third branch pipe, and when the solenoid valve was opened work, first air chamber and second air chamber do not communicate, and second air chamber and third air chamber intercommunication have reached the technical performance that the no pressure difference was opened. When the electromagnetic valve is opened to work, the first air chamber and the second air chamber are not communicated, so that the gas in the first air chamber cannot flow into the second air chamber, the gas in the second air chamber can be completely discharged through the third air chamber, the opening purpose of no pressure difference between the first air chamber and the second air chamber is achieved, and the gas inlet pipe is communicated with the gas outlet pipe. When the electromagnetic valve is closed, the first air chamber is communicated with the second air chamber, the second air chamber is not communicated with the third air chamber, and the technical purpose of closing the air inlet pipe and the air outlet pipe is achieved because the air in the first air chamber enters the second air chamber.
The valve core structure comprises a mandril which is controlled by an electromagnetic coil to move up and down, the mandril controls a thimble assembly to move up and down, and the thimble assembly controls the opening and closing conditions of the first branch pipe and the second branch pipe through a sealing device; the sealing device comprises a first sealing ring for controlling the first branch pipe in a matching mode and a second sealing ring for controlling the second branch pipe in a matching mode, a sealing ball is arranged between the first sealing ring and the second sealing ring, one end of the sealing ball is matched with a through hole in the center of the second sealing ring, and the other end of the sealing ball is matched with a through hole in the center of the first sealing ring. The thimble assembly controls the opening and closing of the first branch pipe and the second branch pipe simultaneously in the up-and-down movement process, and the technical purpose that one assembly controls three branch pipes is achieved. The sealing device controls the second branch pipe through the second sealing ring, controls the first branch pipe through the first sealing ring, and controls the communication performance between the first sealing ring and the second sealing ring through the sealing ball structure.
The thimble assembly comprises a connecting sleeve, one end of the connecting sleeve is connected with the ejector rod, the other end of the connecting sleeve is connected with the thimble spring, and the end part of the thimble spring is connected with a thimble to control the thimble to move up and down.
The periphery of the connecting sleeve is coated with a sealing sleeve, the periphery of the sealing sleeve is hermetically connected with the inner wall of a locking nut, the inner wall of the locking nut is further connected with the outer wall of a mandril, and the outer wall of the locking nut is tightly connected with a valve body to form a sealed connecting structure to prevent air leakage. The ejector rod is arranged in the fixed iron core, the top of the ejector rod is matched with the movable iron core, the ejector rod is pressed downwards by the movable iron core under the action of electromagnetic force, and the ejector rod is reset under the action of a spring arranged on the periphery of the sealing sleeve, so that the reciprocating performance of the up-and-down motion of the ejector rod is achieved.
And the locking nut, the ejector rod and the valve body are matched together to form a third air chamber.
The piston include the piston casing, the piston casing inboard is equipped with the spring holding ring, installs reset spring in the spring holding ring, the piston casing bottom is equipped with the mounting hole of connecting the buckle, the sealed pad of buckle block connection on the mounting hole, the sealed opening and closing of controlling the outlet duct that fills up the cooperation.
The valve body is divided into an upper valve body and a lower valve body, and two ends of the lower valve body are respectively connected with the gas inlet pipe and the gas outlet pipe, and a valve port is arranged between the gas inlet pipe and the gas outlet pipe. The valve port is matched with the lower valve body to form an air outlet communicated with the air outlet pipe, and the air outlet is matched with the sealing gasket.
The lower valve body is provided with one end of a positioning pipe, the other end of the positioning pipe is connected with the upper valve body, and the positioning pipe is sleeved in the third branch pipe. The positioning pipe structure not only plays a role in ventilation in the third branch pipe, but also plays a good positioning function.
The valve core structure controls the opening and closing of the three branch pipes of the first branch pipe, the second branch pipe and the third branch pipe, when the electromagnetic valve is opened to work, the first air chamber is not communicated with the second air chamber, and the second air chamber is communicated with the third air chamber, so that the technical performance of no-pressure-difference opening is achieved.
Drawings
FIG. 1 is a schematic cross-sectional view of a piston-type electromagnetic valve that can be opened without pressure difference according to the present invention;
fig. 2 is an enlarged schematic structural diagram of the valve core structure of the present invention.
Detailed Description
The electromagnetic valve opened without pressure difference comprises a valve body, wherein an air inlet pipe 22 and an air outlet pipe 13 which are controlled to be opened and closed by a piston are arranged in the valve body, a first air chamber 25 and a second air chamber 3 are respectively arranged in the valve body on the upper side and the lower side of the piston, and the first air chamber 25 is communicated with the air inlet pipe 22. The valve body is respectively provided with a first branch pipe 14, a second branch pipe 10, a third branch pipe 21 and a third air chamber 18, one end of the first branch pipe 14 is communicated with the first air chamber 25, the other end of the first branch pipe is communicated with the third air chamber 18, one end of the second branch pipe 10 is communicated with the second air chamber 3, the other end of the second branch pipe is communicated with the third air chamber 18, one end of the third branch pipe 21 is communicated with the air outlet pipe 13, and the other end of the second branch pipe is communicated. A valve core structure for controlling the opening and closing among the first branch pipe, the second branch pipe and the third branch pipe is arranged in the third air chamber 18.
The valve core structure preferably comprises a push rod 20 controlled by the electromagnetic coil 1 to move up and down, the push rod 20 controls the push pin assembly to move up and down, and the push pin assembly controls the opening and closing of the sealing device on the first branch pipe and the second branch pipe. The thimble assembly comprises a connecting sleeve 23 with one end connected with the ejector rod 20 and the other end connected with a thimble spring 24, and the end part of the thimble spring 24 is connected with the thimble 5.
The periphery of the connecting sleeve 23 is coated with a sealing sleeve 19, the periphery of the sealing sleeve 19 is hermetically connected with the inner wall of the locking nut 2, the inner wall of the locking nut 2 is also connected with the outer wall of the ejector rod, and the outer wall of the locking nut is tightly connected with the valve body. The periphery of the sealing sleeve 19 is also sleeved with a spring 31 to achieve the technical purpose of helping the connecting sleeve 23 and the ejector rod 20 to reset. One end of the spring 31 is connected with the sealing sleeve 19, the other end of the spring is connected with the clamping ring 32, and the clamping ring 32 is connected to the inner wall of the locking nut 2, so that a positioning point is provided for the spring 31 on one hand, and a space is provided for the sealing sleeve 19 to move up and down on the other hand.
The locking nut 2, the ejector rod 20 and the valve body are matched together to form a third air chamber 18.
The sealing device comprises a first sealing ring 28 and a second sealing ring 17, wherein the first sealing ring 28 is used for controlling the first branch pipe 14 in a matching mode, the second sealing ring 17 is used for controlling the second branch pipe 10 in a matching mode, a sealing ball 16 is arranged between the first sealing ring 28 and the second sealing ring 17, one end of the sealing ball 16 is matched with the thimble 5 and a through hole in the center of the second sealing ring, and the other end of the sealing ball is matched with the through hole in the center of the.
The piston includes piston housing 8, and piston housing 8 inboard is equipped with spring holding ring 9, installs reset spring 29 in the spring holding ring 9, and piston housing 8 bottom is equipped with the mounting hole of connecting buckle 26, and the sealed pad 27 of buckle 26 block connection on the mounting hole, the sealed opening and closing of 27 cooperation control outlet duct 13 that fills up. The valve body is divided into an upper valve body 6 and a lower valve body 11, and a valve port 30 is arranged between the two ends of the lower valve body 11 and respectively connected with an air inlet pipe and an air outlet pipe. The valve port 30 cooperates with the lower valve body 11 to form an air outlet communicated with the air outlet pipe, and the air outlet cooperates with the sealing gasket 27.
In order to achieve the technical performance of accurate installation, one end of a positioning pipe 15 is installed and connected on the lower valve body 11, the other end of the positioning pipe 15 is connected with the upper valve body 6, and the positioning pipe 15 is sleeved in the third branch pipe.
The specific working process of the invention is as follows: the electromagnetic valve is opened, the ejector rod 20 moves downwards under the pressure of a movable iron core in the electromagnetic valve, the ejector rod 20 pushes the ejector pin 5 to move downwards, the ejector pin seals the first sealing ring 28 through the sealing ball 16, namely, the first branch pipe 14 is closed, the gas in the first air chamber 25 communicated with the gas inlet pipe 22 is pushed up, the piston is jacked to enable the gas inlet pipe 22 to be communicated with the gas outlet pipe 13, at the moment, the second branch pipe 10 and the third branch pipe 21 are communicated, namely, the gas in the second air chamber 3 completely passes through the third air chamber 18, the gas is discharged through the third branch pipe 21, the piston can be completely opened, pressure loss is avoided, and the technical purpose. When the electromagnetic valve is closed, the thimble 5 moves upwards along with the sealing sleeve 19 under the action of the spring 31, at the moment, the sealing ball 16 is jacked up by the gas in the first branch pipe 14, the sealing ball 16 seals the vent hole in the middle of the second sealing ring 17, so that the first air chamber 25 is communicated with the second air chamber 3, the second air chamber 3 is disconnected with the third air chamber 18, and the piston presses downwards to close the air inlet pipe 22 and close the electromagnetic valve of the air outlet pipe 13. In the invention, when the gas in the gas inlet pipe 22 and the gas outlet pipe 13 flows and the gas pressure in the gas outlet pipe 13 is higher than that of the gas inlet pipe 22, the gas flows from the third branch pipe 21 to the second branch pipe 10, and the piston reaching the second gas chamber 3 presses down to close the gas inlet pipe 22 and the gas outlet pipe 13, thereby playing a unidirectional role and preventing backflow.
Claims (9)
1. The utility model provides a solenoid valve that piston non-pressure difference was opened, includes the valve body, is equipped with the intake pipe and the outlet duct of piston control switching in the valve body, its characterized in that: a first air chamber and a second air chamber are respectively arranged in the valve bodies on the upper side and the lower side of the piston, and the first air chamber is communicated with an air inlet pipe; the valve body is respectively provided with a first branch pipe, a second branch pipe, a third branch pipe and a third air chamber, one end of the first branch pipe is communicated with the first air chamber, the other end of the first branch pipe is communicated with the third air chamber, one end of the second branch pipe is communicated with the second air chamber, the other end of the second branch pipe is communicated with the third air chamber, one end of the third branch pipe is communicated with the air outlet pipe, and the other end of the third branch pipe is communicated with; and a valve core structure for controlling the opening and closing among the first branch pipe, the second branch pipe and the third branch pipe is arranged in the third air chamber.
2. The piston-type differential pressure-free opening solenoid valve as claimed in claim 1, wherein: the valve core structure comprises a mandril which is controlled by an electromagnetic coil to move up and down, the mandril controls a thimble assembly to move up and down, and the thimble assembly controls the opening and closing conditions of the first branch pipe and the second branch pipe through a sealing device; the sealing device comprises a first sealing ring for controlling the first branch pipe in a matching mode and a second sealing ring for controlling the second branch pipe in a matching mode, a sealing ball is arranged between the first sealing ring and the second sealing ring, one end of the sealing ball is matched with a through hole in the center of the second sealing ring, and the other end of the sealing ball is matched with a through hole in the center of the first sealing ring.
3. The piston-type non-differential opening electromagnetic valve of claim 2, characterized in that: the thimble assembly comprises a connecting sleeve, one end of the connecting sleeve is connected with the ejector rod, the other end of the connecting sleeve is connected with the thimble spring, and the end part of the thimble spring is connected with the thimble.
4. The piston-type non-differential opening solenoid valve of claim 3, wherein: the periphery of the connecting sleeve is coated with a sealing sleeve, the periphery of the sealing sleeve is hermetically connected with the inner wall of a locking nut, the inner wall of the locking nut is also connected with the outer wall of a mandril, and the outer wall of the locking nut is tightly connected with the valve body.
5. The piston-type differential pressure-free opening solenoid valve as claimed in claim 4, wherein: and the locking nut, the ejector rod and the valve body are matched together to form a third air chamber.
6. The piston-type differential pressure-free opening solenoid valve as claimed in claim 1, wherein: the piston include the piston casing, the piston casing inboard is equipped with the spring holding ring, installs reset spring in the spring holding ring, the piston casing bottom is equipped with the mounting hole of connecting the buckle, the sealed pad of buckle block connection on the mounting hole, the sealed opening and closing of controlling the outlet duct that fills up the cooperation.
7. The piston-type differential pressure-free opening solenoid valve as claimed in claim 1, wherein: the valve body is divided into an upper valve body and a lower valve body, the two ends of the lower valve body are respectively connected with an air inlet pipe and an air outlet pipe, and a valve port is arranged in the middle of the lower valve body.
8. The piston-type non-differential opening electromagnetic valve of claim 7, characterized in that: the valve port is matched with the lower valve body to form an air outlet communicated with the air outlet pipe, and the air outlet is matched with the sealing gasket.
9. The piston-type non-differential opening electromagnetic valve of claim 7, characterized in that: the lower valve body is provided with one end of a positioning pipe, the other end of the positioning pipe is connected with the upper valve body, and the positioning pipe is sleeved in the third branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011572117.9A CN112728126A (en) | 2020-12-27 | 2020-12-27 | Piston type electromagnetic valve opened without differential pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011572117.9A CN112728126A (en) | 2020-12-27 | 2020-12-27 | Piston type electromagnetic valve opened without differential pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112728126A true CN112728126A (en) | 2021-04-30 |
Family
ID=75616935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011572117.9A Pending CN112728126A (en) | 2020-12-27 | 2020-12-27 | Piston type electromagnetic valve opened without differential pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112728126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984314A (en) * | 2021-11-11 | 2022-01-28 | 江铃汽车股份有限公司 | Impact and vibration test tool for low-voltage junction box |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182862A (en) * | 2011-06-09 | 2011-09-14 | 成都欧迅海洋工程装备科技有限公司 | Direct-immersion-type electromagnetic pilot valve |
| CN204985828U (en) * | 2015-09-25 | 2016-01-20 | 宁波开灵气动元件制造有限公司 | Tee bend diaphragm formula normally open solenoid valve |
| CN204985946U (en) * | 2015-09-25 | 2016-01-20 | 宁波开灵气动元件制造有限公司 | Novel guide's diaphragm formula normally open solenoid valve |
| CN107740871A (en) * | 2017-10-18 | 2018-02-27 | 宁波文泽机电技术开发有限公司 | Screw thread inserting type Solenoid ball valve |
| CN207178853U (en) * | 2017-07-31 | 2018-04-03 | 宁波开灵气动元件制造有限公司 | A kind of guided piston type high-temperature solenoid valve |
-
2020
- 2020-12-27 CN CN202011572117.9A patent/CN112728126A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182862A (en) * | 2011-06-09 | 2011-09-14 | 成都欧迅海洋工程装备科技有限公司 | Direct-immersion-type electromagnetic pilot valve |
| CN204985828U (en) * | 2015-09-25 | 2016-01-20 | 宁波开灵气动元件制造有限公司 | Tee bend diaphragm formula normally open solenoid valve |
| CN204985946U (en) * | 2015-09-25 | 2016-01-20 | 宁波开灵气动元件制造有限公司 | Novel guide's diaphragm formula normally open solenoid valve |
| CN207178853U (en) * | 2017-07-31 | 2018-04-03 | 宁波开灵气动元件制造有限公司 | A kind of guided piston type high-temperature solenoid valve |
| CN107740871A (en) * | 2017-10-18 | 2018-02-27 | 宁波文泽机电技术开发有限公司 | Screw thread inserting type Solenoid ball valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984314A (en) * | 2021-11-11 | 2022-01-28 | 江铃汽车股份有限公司 | Impact and vibration test tool for low-voltage junction box |
| CN113984314B (en) * | 2021-11-11 | 2024-03-15 | 江铃汽车股份有限公司 | Impact and vibration test tool for low-voltage cable box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105545858B (en) | A kind of special Pneumatic valve of pneumohydraulic pressure-cylinder and pneumohydraulic pressure-cylinder | |
| CN112728126A (en) | Piston type electromagnetic valve opened without differential pressure | |
| US5370354A (en) | Hermetic solenoid operated valve structure and method of manufacturing the same | |
| CN107084276B (en) | Piston type vacuum coaxial valve using vacuum as power air source | |
| CN111075957B (en) | Bidirectional on-off control high-pressure pilot electromagnetic valve | |
| CN202252253U (en) | Large-caliber direct-acting piston type electromagnetic valve | |
| CN104676078A (en) | Self-holding solenoid valve | |
| CN216519741U (en) | Low flow resistance pneumatic control three-way angle seat valve | |
| CN215486474U (en) | Variable displacement compressor flow control valve controlled by pressure difference | |
| CN114576365B (en) | Pilot diaphragm type normally open electromagnetic valve structure | |
| CN113819267B (en) | Valve rod assembly, main valve structure and pressure relief type two-position five-way electromagnetic reversing valve | |
| CN209892788U (en) | Two-position three-way direct-acting pneumatic control valve | |
| CN213598682U (en) | Novel hydraulic valve structure | |
| CN209762540U (en) | Air exhaust valve | |
| CN201053517Y (en) | Vacuum stop valve | |
| CN106958683B (en) | Two-position two-way high-low pressure all-purpose valve | |
| CN221683609U (en) | Sliding switch valve | |
| CN220828525U (en) | Two-stage shutoff valve | |
| CN220134756U (en) | Carbon tank electromagnetic valve | |
| CN206520606U (en) | A kind of harbour machinery brakes trailer control valve | |
| CN218894994U (en) | One-way air inlet valve and compressor | |
| CN110220021A (en) | A kind of family explosion stack integral valve | |
| CN221347885U (en) | Solenoid valve and vehicle | |
| CN110566681B (en) | Ultrahigh pressure stop valve | |
| CN219242775U (en) | Novel inserting plate type electromagnetic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |