CN113700907B - Vacuum pump check valve and vehicle - Google Patents
Vacuum pump check valve and vehicle Download PDFInfo
- Publication number
- CN113700907B CN113700907B CN202111030353.2A CN202111030353A CN113700907B CN 113700907 B CN113700907 B CN 113700907B CN 202111030353 A CN202111030353 A CN 202111030353A CN 113700907 B CN113700907 B CN 113700907B
- Authority
- CN
- China
- Prior art keywords
- channel
- valve
- vacuum pump
- valve core
- inlet
- 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.)
- Active
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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/57—Vacuum systems indirect, i.e. vacuum booster units characterised by constructional features of control valves
-
- 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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/141—Check valves with flexible valve members the closure elements not being fixed to the valve body
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Details Of Valves (AREA)
- Check Valves (AREA)
Abstract
The embodiment of the invention provides a vacuum pump one-way valve and a vehicle, wherein the vacuum pump one-way valve comprises a valve body, an inlet and an outlet which are arranged on the valve body; the valve body comprises a shell, an elastic seat, an elastic piece and a valve core, wherein a channel is arranged in the shell, and the elastic seat, the elastic piece and the valve core are all arranged in the channel; a first end of the passageway is in communication with the inlet and a second end of the passageway is in communication with the outlet; the elastic piece is sleeved on the elastic seat, the elastic seat is connected with the valve core, and the valve core is arranged at the inlet; the valve core is of a spherical structure, and the diameter of the spherical structure is larger than the caliber of the inlet. Through above-mentioned structure, guarantee the leakproofness of vacuum pump check valve to improve vehicle braking performance.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vacuum pump check valve and a vehicle.
Background
The vacuum pump of the vehicle is a boosting device for a brake braking system and a steering system, and is an important safety part in the vacuum braking system of the vehicle. The vehicle vacuum pump is connected with the brake master cylinder through a hard pipe and is driven to rotate by a camshaft of the engine. A one-way valve is arranged at the joint of the vehicle vacuum pump and the brake master pump, and the one-way valve is controlled to be opened and closed by generating negative pressure.
A plane sealing structure is arranged between a valve core and a valve body of the existing vacuum pump check valve, so that the situation that engine oil inside the vacuum pump flows back into a brake master cylinder due to poor sealing is easy to occur, and the brake effect is poor.
Disclosure of Invention
The embodiment of the invention provides a vacuum pump one-way valve and a vehicle, and can solve the problem of poor braking performance of the vehicle caused by the adoption of the existing vacuum pump one-way valve.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present invention provides a vacuum pump check valve, which includes a valve body, and an inlet and an outlet disposed on the valve body;
the valve body comprises a shell, an elastic seat, an elastic piece and a valve core, wherein a channel is arranged in the shell, and the elastic seat, the elastic piece and the valve core are all arranged in the channel;
a first end of the passageway is in communication with the inlet and a second end of the passageway is in communication with the outlet;
the elastic piece is sleeved on the elastic seat, the elastic seat is connected with the valve core, and the valve core is arranged at the inlet;
the valve core is of a spherical structure, and the diameter of the spherical structure is larger than the caliber of the inlet.
In a second aspect, embodiments of the present invention provide a vehicle including a vacuum pump check valve as described above.
In the embodiment of the invention, the vacuum pump check valve comprises a valve body, an inlet and an outlet which are arranged on the valve body, wherein the valve body comprises a shell, an elastic seat, an elastic piece and a valve core, wherein a channel is arranged in the shell, the elastic seat, the elastic piece and the valve core are arranged in the channel; the elastic piece is sleeved on the elastic seat, the elastic seat is connected with the valve core, and the valve core is arranged at the inlet; the valve core is of a spherical structure, the diameter of the spherical structure is larger than the caliber of the inlet, and the sealing performance of the vacuum pump check valve is guaranteed through the structure, so that the braking performance of a vehicle is improved.
Drawings
Fig. 1 is a schematic structural diagram of a check valve of a vacuum pump according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a check valve of a vacuum pump according to an embodiment of the present invention, where the check valve of the vacuum pump includes a valve body 10, and an inlet 20 and an outlet 30 disposed on the valve body 10;
the valve body 10 comprises a shell 11, an elastic seat 12, an elastic piece 13 and a valve core 14, wherein a channel is arranged in the shell 11, and the elastic seat 12, the elastic piece 13 and the valve core 14 are all arranged in the channel;
a first end of the passageway is in communication with the inlet 20 and a second end of the passageway is in communication with the outlet 30;
the elastic piece 13 is sleeved on the elastic seat 12, the elastic seat 12 is connected with the valve core 14, and the valve core 14 is arranged at the inlet 20;
the valve core 14 is a spherical structure, and the diameter of the spherical structure is larger than the caliber of the inlet 20.
The valve body 10 can be used as a connecting part of two parts to be communicated, the valve body 10 is provided with an inlet 20 and an outlet 30, the two parts are respectively connected with the inlet 20 and the outlet 30 of the valve body 10, the flowing state of flowing media in the two parts to be communicated is controlled by controlling the opening or closing of the one-way valve, and the flowing media can be oil liquid, gas and the like. For example: when the valve body 10 is arranged on a vehicle, a vehicle vacuum pump is driven by an engine camshaft to rotate and is connected with a master cylinder, a check valve is arranged at the joint, when the vacuum pump runs, the valve core 14 is separated from the shell 11, the check valve is opened at the moment, when the vacuum pump stops running, the valve core 14 is connected with the shell 11, the check valve is closed at the moment, and the opening or closing of the check valve is controlled, so that whether engine oil in the vacuum pump enters the master cylinder or not is controlled.
When the vacuum pump operates, the valve core 14 is subjected to a drawing force from the vacuum pump, the valve core 14 moves in a direction close to the vacuum pump and drives the elastic seat 12 connected with the valve core 14 to move in a direction close to the vacuum pump, the elastic part 13 is in a compression state, and at the moment, the valve is opened; when the vacuum pump stops operating, the elastic part 13 recovers, the valve core 14 and the elastic part 13 are driven to move along the direction far away from the vacuum pump until the valve core 14 is connected with the shell 11, and the valve is closed.
Specifically, the valve core 14 of the spherical structure is in line sealing with the housing 11, and when the vacuum pump operates, the spherical structure rotates along with the flow of the gas, so that foreign matters can be prevented from entering the interior of the valve body 10.
In the embodiment of the invention, the vacuum pump check valve comprises a valve body 10, an inlet 20 and an outlet 30 which are arranged on the valve body, wherein the valve body 10 comprises a shell 11, an elastic seat 12, an elastic piece 13 and a valve core 14, wherein a channel is arranged in the shell, the elastic seat 12, the elastic piece 13 and the valve core 14 are arranged in the channel, a first end of the channel is communicated with the inlet 20, and a second end of the channel is communicated with the outlet 30; the elastic piece 13 is sleeved on the elastic seat 12, the elastic seat 12 is connected with the valve core 14, and the valve core 14 is arranged at the inlet 20; the valve core 14 is of a spherical structure, the diameter of the spherical structure is larger than the caliber of the inlet 20, and the sealing performance of the vacuum pump check valve is guaranteed through the structure, so that the braking performance of a vehicle is improved.
Optionally, the channel includes a first channel and a second channel which are communicated with each other, and the diameter of the second channel is smaller than that of the first channel;
the first end of the first passage communicates with the outlet 30 and the spool 14 is located in the second passage.
The size of the pipe orifice of the first pipeline and the second pipeline is matched with the size of the interface of the component to be connected, and the first pipeline and the second pipeline can be made into common sizes or special sizes, which is not limited in this embodiment.
The valve element 14 is arranged in the second channel with the smaller diameter, the valve element 14 is matched with the second channel in size and faces the inlet 20, when the vacuum pump runs, the valve element 14 moves towards the outlet 30 until the valve element moves to the second pipeline with the diameter larger than that of the first pipeline, and at the moment, the valve is opened. In addition, by providing passages of different diameters, the flow velocity of the flowing medium is changed.
Optionally, the vacuum pump check valve further includes a sliding member 15 disposed on the elastic seat 12, and the elastic seat 12 is slidably connected to the first channel through the sliding member 15.
The sliding member 15 may be an annular structure sleeved on the elastic seat 12, an inner diameter of the annular structure is adapted to a surface shape of the spring seat, the sliding member 15 and the elastic seat 12 are relatively fixed, and an outer diameter of the annular structure is adapted to an inner diameter of the first passage, so as to control a moving path of the valve element 14 and the elastic seat 12 when the valve element 14 and the elastic seat 12 move in the first passage, that is, the moving path of the valve element 14 and the elastic seat 12 when the valve element and the elastic seat move toward the outlet 30 or the inlet 20 of the valve body 10 is unchanged. Preferably, the valve core 14 and the elastic seat 12 are arranged with their center lines coinciding with the center line of the first passage, so that the force applied to the valve body 10 is in a balanced state, thereby controlling the flowing medium to be uniformly distributed or flow uniformly in the valve.
Optionally, the vacuum pump check valve further includes a sealing element 16 and an annular sealing strip 17, the sealing element 16 is connected to the sliding element 15, the annular sealing strip 17 is disposed on the inner wall of the first channel, the annular sealing strip 17 is sleeved on the sealing element 16, and the annular sealing strip 17 is abutted to the sealing element 16.
Wherein the sealing member 16 is a connecting member disposed between the slider 15 and the valve element 14, and the sealing member 16 forms an annular groove with the slider 15 and the valve element 14, and the opening of the annular groove faces the inner wall of the first passage. And an annular sealing strip 17 is provided around the interior of the first channel and extends towards the annular groove until it abuts the annular groove.
When the check valve is in a closed state, the valve core 14 is abutted against the second channel, and the annular sealing strip 17 is arranged on the inner wall of the first channel, so that a small amount of flowing medium which passes through the valve core 14 and is still in the first channel is intercepted, and the real-time sealing performance of the check valve is improved. Specifically, the annular sealing strip 17 may be made of rubber, and the rubber has the characteristics of good elasticity, high strength, good air tightness and the like.
Optionally, the annular sealing strip 17 is disposed on the inner wall of the first channel, and the annular sealing strip 17 is located at the second end of the first channel.
Specifically, an annular sealing strip 17 is disposed at the second end of the first channel, wherein the second end of the first channel is communicated with the second channel, and the diameter of the second channel is smaller than that of the first channel, when the check valve is opened, the valve core 14 moves from the second channel toward the direction of the first channel, at this time, the flowing medium flows through the second channel and the valve core 14 from the inlet 20 of the valve body 10, if the check valve is closed at this time, the flowing medium which has entered the second channel contacts with the annular sealing element 16 disposed at the second end of the first channel, so as to limit the flowing medium from flowing into the first channel.
Optionally, the valve core 14 is arranged on the sealing element 16, and the centers of the sealing element 16, the spherical structure and the sliding element 15 are located on the axis of the first channel;
the diameter of the spherical structure is larger than the diameter of the sealing member 16 and the diameter of the slider 15 is larger than the diameter of the spherical structure.
In particular, the spherical structure, the sealing member 16 and the slider 15 are arranged in the passage in this order in the direction of flow of the flowing medium in the valve body 10. By providing a spherical structure, the sealing member 16 and the sliding member 15 are located on the central axis of the first passage so that the forces applied to the valve body 10 are in equilibrium, the uniform distribution, or flow, of the flowing medium in the valve is controlled.
In addition, by setting the diameter of the spherical structure to be larger than that of the sealing member 16, the efficiency of the annular sealing strip 17 for trapping the flowing medium can be improved. Since the diameter of the first channel is larger than that of the second channel, the sliding member 15 is located in the first channel and connected to the inner wall of the first channel, and the spherical structure is located in the second channel and connected to the second channel, the diameter of the sliding member 15 is larger than that of the spherical structure. In particular, the spherical structure, the sealing element 16 and the slider 15 form an annular groove which opens towards the inner wall of the first channel.
Optionally, the channel further includes a connection surface connecting the first channel and the second channel, the arc surface of the spherical structure matches with the arc surface of the connection surface, and the arc surface of the spherical structure faces the inlet 20.
The valve core 14 is located on a connection surface between the first channel and the second channel, and when the check valve is closed, the arc surface of the spherical structure is attached to the arc surface of the connection surface, so that the flowing state of the flowing medium is limited.
Optionally, the elastic seat 12 and the valve core 14 are formed as an integral structure.
In this embodiment, by arranging the elastic seat 12 and the valve core 14 as an integrally formed structure, poor sealing of the check valve caused by dimensional deviation and installation problems of the elastic seat 12 and the valve core 14 can be avoided.
Optionally, the elastic seat 12 and the valve core 14 are both made of fluorosilicone rubber.
On the basis of keeping the excellent performances of heat resistance, cold resistance, high voltage resistance, weather aging resistance and the like of the existing organosilicon material, the fluorosilicone rubber has the excellent performances of hydrogen-resistant solvent, oil resistance, acid and alkali resistance and lower surface energy of the organofluorine material due to the introduction of fluorine-containing groups. When the vacuum pump check valve is applied to a vehicle, the elastic seat 12 and the valve core 14 made of the fluorosilicone rubber can resist corrosion of elements in an engine oil additive, so that the performance of the vacuum pump check valve is effectively ensured, and the reliability of the braking performance of the whole vehicle is improved.
The embodiment of the invention also provides a vehicle which comprises the vacuum pump one-way valve. Since the technical solution of this embodiment includes all technical solutions of the above embodiments, at least all technical effects of the above embodiments can be achieved, and details are not repeated here.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A vacuum pump one-way valve is characterized by comprising a valve body, an inlet and an outlet, wherein the inlet and the outlet are arranged on the valve body;
the valve body comprises a shell, an elastic seat, an elastic piece and a valve core, wherein a channel is arranged in the shell, and the elastic seat, the elastic piece and the valve core are all arranged in the channel;
a first end of the passageway is in communication with the inlet and a second end of the passageway is in communication with the outlet;
the elastic piece is sleeved on the elastic seat, the elastic seat is connected with the valve core, and the valve core is arranged at the inlet;
the valve core is of a spherical structure, and the diameter of the spherical structure is larger than the caliber of the inlet;
the channel comprises a first channel and a second channel which are communicated with each other, and the diameter of the second channel is smaller than that of the first channel;
the first end of the first channel is communicated with the outlet, and the valve core is positioned in the second channel;
the vacuum pump check valve further comprises a sliding piece arranged on the elastic seat, and the elastic seat is connected with the first channel in a sliding mode through the sliding piece;
the vacuum pump one-way valve further comprises a sealing element and an annular sealing strip, the sealing element is connected with the sliding element, the annular sealing strip is arranged on the inner wall of the first channel, the annular sealing strip is sleeved on the sealing element, and the annular sealing strip is abutted to the sealing element;
when the one-way valve is in a closed state, the valve core is abutted with the second channel, and an annular sealing strip is arranged on the inner wall of the first channel, so that a small amount of flowing medium which passes through the valve core and is still in the first channel is trapped.
2. A vacuum pump check valve as claimed in claim 1, wherein the annular sealing strip is provided on an inner wall of the first passage and is located at the second end of the first passage.
3. A vacuum pump check valve as defined in claim 1, wherein the spool is disposed on the seal member, the center of the seal member, the spherical structure, and the slider being located on the axis of the first passage;
the diameter of the spherical structure is larger than that of the sealing element, and the diameter of the sliding element is larger than that of the spherical structure.
4. A vacuum pump check valve as defined in claim 1, wherein the passage further comprises a connection face connecting the first passage and the second passage; the cambered surface of the spherical structure is matched with the cambered surface of the connecting surface, and the cambered surface of the spherical structure faces the inlet.
5. A vacuum pump check valve as defined in claim 1, wherein the resilient seat is integrally formed with the valve spool.
6. A vacuum pump check valve as defined in claim 1, wherein the elastic seat and the valve core are made of fluorosilicone rubber.
7. A vehicle comprising a vacuum pump check valve as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111030353.2A CN113700907B (en) | 2021-09-03 | 2021-09-03 | Vacuum pump check valve and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111030353.2A CN113700907B (en) | 2021-09-03 | 2021-09-03 | Vacuum pump check valve and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113700907A CN113700907A (en) | 2021-11-26 |
| CN113700907B true CN113700907B (en) | 2023-03-21 |
Family
ID=78658987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111030353.2A Active CN113700907B (en) | 2021-09-03 | 2021-09-03 | Vacuum pump check valve and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113700907B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114436195B (en) * | 2021-12-23 | 2024-04-05 | 广州侍美科技有限公司 | On-off valve and liquid taking assembly |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2836163B2 (en) * | 1989-12-21 | 1998-12-14 | 住友電気工業株式会社 | Flow control valve |
| CN2397328Y (en) * | 1999-08-20 | 2000-09-20 | 段梦麟 | Double controlling check valve |
| CN202091578U (en) * | 2010-12-06 | 2011-12-28 | 东辉休闲运动用品(上海)有限公司 | Fixed structure of non return valve core |
| CN201944351U (en) * | 2011-03-11 | 2011-08-24 | 厦门松霖科技有限公司 | Water path non-return device |
| CN203427777U (en) * | 2013-07-17 | 2014-02-12 | 瑞立集团瑞安汽车零部件有限公司 | Vacuum check valve assembly |
| JP6523844B2 (en) * | 2015-07-18 | 2019-06-05 | ボーグワーナー インコーポレーテッド | Integrated check relief valve |
| RU2612771C1 (en) * | 2016-04-06 | 2017-03-13 | Закрытое акционерное общество "ПРОММАШСЕРВИС" | Return valve for casing strings |
| WO2018212289A1 (en) * | 2017-05-19 | 2018-11-22 | アイシン・エィ・ダブリュ株式会社 | Relief valve |
| CN207848499U (en) * | 2018-01-31 | 2018-09-11 | 乐清市铭锐气动科技有限公司 | A kind of Pneumatic check valve |
-
2021
- 2021-09-03 CN CN202111030353.2A patent/CN113700907B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113700907A (en) | 2021-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014068765A1 (en) | Valve | |
| CN113700907B (en) | Vacuum pump check valve and vehicle | |
| CN105143738A (en) | Flow control for aspirators producing vacuum using the Venturi effect | |
| CN111609197B (en) | Combined type exhaust valve | |
| CN210266036U (en) | One-way valve | |
| CN218267295U (en) | Electronic expansion valve | |
| CN109538810B (en) | Small-size light weight solenoid valve | |
| CN215980922U (en) | Pipe joint type cut-off plug door for railway vehicle | |
| WO2022127577A1 (en) | Z-shaped liquid control valve without diaphragm, shaft, bushing, or spring | |
| CN213629357U (en) | Stop valve | |
| CN216895948U (en) | High-pressure one-way throttle valve | |
| CN110131446A (en) | A kind of three-way ball valve | |
| CN212536794U (en) | Minimum pressure valve for air compressor | |
| CN205978616U (en) | Poor reversing valve core of non -pressure | |
| CN220416267U (en) | Bidirectional sealing low-temperature butterfly valve | |
| CN214662116U (en) | Middle line opposite clamping rubber valve seat with strong tensile resistance | |
| CN220727201U (en) | Novel quick-insertion type one-way valve module | |
| CN221221472U (en) | Valve assembly, pneumatic massage system and seat | |
| CN209818821U (en) | Efficient and leak-proof T-shaped valve | |
| CN214093245U (en) | Pilot piston type electromagnetic valve | |
| CN213392927U (en) | Electromagnetic valve | |
| CN210372099U (en) | Ball valve | |
| CN215522042U (en) | Ball valve with better non-return sealing performance | |
| CN211777965U (en) | Double-channel output oil pump with pressure controlled by one-way valve | |
| CN210716161U (en) | Pressure reducing 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |