CN108131479B - A kind of one-way throttle valve - Google Patents
A kind of one-way throttle valve Download PDFInfo
- Publication number
- CN108131479B CN108131479B CN201711392925.5A CN201711392925A CN108131479B CN 108131479 B CN108131479 B CN 108131479B CN 201711392925 A CN201711392925 A CN 201711392925A CN 108131479 B CN108131479 B CN 108131479B
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- CN
- China
- Prior art keywords
- flow
- spool
- valve body
- slot
- flow slot
- 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.)
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Classifications
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- 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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
-
- 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
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
-
- 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
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
Abstract
The invention discloses a kind of one-way throttle valves, it include valve body, the first through-flow slot and the second through-flow slot are provided in valve body, partition is provided between first through-flow slot and the second through-flow slot, the first through flow hole being connected with the described first through-flow slot is offered on the outer wall of valve body, and the second through flow hole being connected with the described second through-flow slot is also provided on the outer wall of valve body；It is provided with the spool that can be moved axially in valve body, is provided with guide rod on spool, is arranged with spring outside the guide rod, offers third through flow hole on the outer wall of the spool two sides on valve body, spool offers throttle orifice；When spool is located at left limit, throttle orifice is conducted with the third through flow hole, is blocked between the first through-flow slot and the second through-flow slot, when spool is located at right limit, end between throttle orifice and the third through flow hole, is connected between the first through-flow slot and the second through-flow slot.The advantage is that: integrating check valve and throttle valve, structurally reasonable, compact, flow resistance is small.
Description
Technical field
The present invention relates to throttle valve manufacturing technology field, a kind of especially one-way throttle valve.
Background technique
The effect of common check valve is to flow hydraulic oil can only in one direction, mustn't it is reversed flow backwards, it is common to throttle
The effect of valve is by changing throttling section or chock length to control the flow control valve of fluid flow, by throttle valve and unidirectionally
Valve parallel connection is then combined into one-way throttle valve, i.e., specific direction can open check valve, no throttling action, with specific direction phase
Anti- direction can not open check valve, can only flow out from throttle valve, there is throttling action.One-way throttle valve generally used now is all basic
It is made of two elements, a valve pocket for having both unidirectional valve action adds the spool with throttle orifice to be composed, this list
To throttle valve, not only outer dimension is larger, requires compact-sized occasion difficult to install some, and no pressure is mended when throttling
Function is repaid, the instability of flow when loading variation loads the then flow-reduction that becomes larger, and loads the then flow increase that becomes smaller.
As the invention of Patent No. 201410520938.6 entitled " one-way throttle valve " specially discloses a kind of one-way throttle
Valve, including half-duplex channel and throttling passage, half-duplex channel flow to valve port B by valve port A, and half-duplex channel is by way of throttling channel one, radial direction
Hole, axial hole；Throttling passage flows to valve port A by valve port B, and throttling passage is by way of axial hole, radial hole, throttling channel one, throttling channel
Two；Throttling channel one, throttling channel two, radial hole, axial hole are arranged on valve body, and valve port A and valve port B are arranged on valve seat,
There is cavity one, valve body setting can slided in cavity one and between valve port A and valve port B in valve seat.Although above-mentioned patent, can
To realize one-way throttle function, but when its throttling, flow area size, no pressure compensation function, load variation are only changed
When output flow change greatly；And when realizing one-way function, oil liquid will also be flowed through from throttling channel, and flow resistance is larger, be not suitable for
It is used in low-pressure hydraulic system.
Summary of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide simple and reasonable for structure, costs
It is low, with pressure compensation and a kind of small one-way throttle valve of flow resistance.
The technical scheme of the invention to solve the technical problem is:
A kind of one-way throttle valve includes valve body, the first through-flow slot and the second through-flow slot is provided in valve body, first is through-flow
It is provided with partition between slot and the second through-flow slot, it is logical that first to be connected with the described first through-flow slot is offered on the outer wall of valve body
Discharge orifice is also provided with the second through flow hole being connected with the described second through-flow slot on the outer wall of valve body；Being provided in valve body can
The spool of axial movement is provided with guide rod on spool, is arranged with spring outside the guide rod, in the spool two sides on valve body
Third through flow hole is offered on outer wall, spool offers throttle orifice；When spool is located at left limit, throttle orifice and the third are logical
Discharge orifice is conducted, and is blocked between the first through-flow slot and the second through-flow slot, when spool is located at right limit, throttle orifice and described the
End between threeway discharge orifice, is connected between the first through-flow slot and the second through-flow slot.
The technical measures of optimization further include:
Above-mentioned spool can be axially movably assemblied on guide rod, and being provided on guide rod can be in guide rod axial direction
The first spring base and second spring seat of sliding, are provided with spring between the first spring base and second spring seat.
It is provided with thread segment on above-mentioned guide rod, is provided with nut on the outside of the second spring seat on thread segment.
Above-mentioned spool is made of cylindrical portion, tapered portion and cylindrical portion, and the diameter of cylindrical portion is less than the cylindrical portion
Outer diameter, throttle orifice are set in tapered portion.
It is provided with retaining ring in above-mentioned valve body, when spool is located at right limit, tapered portion offsets with the retaining ring.
Above-mentioned partition is provided centrally with centre bore, and when spool is located at left limit, the cylindrical portion of spool is located at described
In centre bore.
Above-mentioned first is through-flow, and slot is obliquely installed.
Above-mentioned second is through-flow, and slot is obliquely installed.
Above-mentioned valve body and installation position bolt.
A kind of one-way throttle valve of the present invention, integrates check valve and throttle valve, structurally reasonable, compact, by valve
It is provided with the spool that can be moved axially in vivo, and offers throttle orifice on spool, (the throttling shape when spool is located at left limit
State), it is blocked between the first through-flow slot and the second through-flow slot, throttle orifice is conducted with third through flow hole, and fluid is through-flow from third
Hole flows into valve body, after throttle orifice, flows out from the first through flow hole；When spool is located at right limit (unidirectional state), first is through-flow
It is connected between slot and the second through-flow slot, ends between throttle orifice and the third through flow hole, fluid flows into valve from the first through flow hole
Body, a part are flowed out from the second through flow hole, and another part is flowed out through throttle orifice from valve body right side.This one-way throttle valve flow resistance
It is small, cooperate guide rod upper spring setting, make this one-way throttle valve have pressure compensation, be its performance more preferably.
Detailed description of the invention
Fig. 1 is structural schematic diagram when spool of the present invention is located at left limit；
Fig. 2 is the structural schematic diagram of spool in Fig. 1；
Fig. 3 is structural schematic diagram when spool of the present invention is located at right limit.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
It is as shown in Figure 1 to Figure 3 structural schematic diagram of the invention,
Appended drawing reference therein are as follows: A mouthfuls, B mouthfuls, valve body 1, the first through flow hole 1a, the second through flow hole 1b, third through flow hole
1c, the first through-flow slot 11, the second through-flow slot 12, partition 13, centre bore 13a, spool 2, throttle orifice 2a, cylindrical portion 21, tapered portion
22, cylindrical portion 23, guide rod 3, thread segment 3a, nut 31, spring 4, the first spring base 41, second spring seat 42, retaining ring 5, figure
Middle arrow direction indicates fluid flow direction.
As shown in Figure 1 to Figure 3,
A kind of one-way throttle valve includes valve body 1, and the first through-flow slot 11 and the second through-flow slot 12 are provided in valve body 1, the
It is provided with partition 13 between one through-flow slot 11 and the second through-flow slot 12, is offered on the outer wall of valve body 1 and the described first through-flow slot
It is logical to be also provided with second to be connected with the described second through-flow slot 12 on the outer wall of valve body 1 by 11 the first through flow hole 1a being connected
Discharge orifice 1b；It is provided with the spool 2 that can be moved axially in valve body 1, is provided with guide rod 3 on spool 2, is arranged outside the guide rod 3
There is spring 4, offers third through flow hole 1c on the outer wall of 2 two sides of spool on valve body 1, spool 2 offers throttle orifice 2a；
When spool 2 is located at left limit, throttle orifice 2a is conducted with the third through flow hole 1c, the first through-flow slot 11 and the second through-flow slot
It is blocked between 12, when spool 2 is located at right limit, ends between throttle orifice 2a and the third through flow hole 1c, first is through-flow
It is connected between slot 11 and the second through-flow slot 12.
In embodiment, spool 2 can be axially movably assemblied on guide rod 3, and being provided on guide rod 3 can be oriented to
Bar the first spring base 41 and second spring seat 42 in axial sliding, are provided with bullet between the first spring base 41 and second spring seat 42
Spring 4.First spring base 41 and second spring seat 42 are set, the installation of spring 4 is facilitated.
In embodiment, it is provided with thread segment 3a on guide rod 3, is set on thread segment 3a in the outside of the second spring seat 42
It is equipped with nut 31.
Thread segment 3a and nut 31 are set, the pretightning force of adjustment spring 4 are capable of by the precession position of adjusting nut 31,
To the cracking pressure of 1 right side of regulation valve body.
In embodiment, spool 2 is made of cylindrical portion 21, tapered portion 22 and cylindrical portion 23, and the diameter of cylindrical portion 23 is less than
The outer diameter of the cylindrical portion 21, throttle orifice 2a are set in tapered portion 22.
In embodiment, retaining ring 5 is provided in valve body 1, when spool 2 is located at right limit, tapered portion 22 and 5 phase of retaining ring
It supports.
In embodiment, partition 13 is provided centrally with centre bore 13a, when spool 2 is located at left limit, the cylinder of spool 2
Portion 21 is located in the centre bore 13a.
In embodiment, the first through-flow slot 11 is obliquely installed.
In embodiment, the second through-flow slot 12 is obliquely installed.
First through-flow slot 11 and the second through-flow slot 12 are obliquely installed, and the volume second that can increase by the first through-flow slot 11 is through-flow
Slot 12 increases the flow under unidirectional state.
In embodiment, valve body 1 and installation position bolt.
Working principle:
This one-way throttle valve integrates check valve and throttle valve, compact-sized, passes through the external screw thread being arranged outside valve body 1
Valve is bolted in installation position, the both ends of installation position are respectively A mouthfuls and B mouthfuls.
Throttle: as shown in Figure 1, under the elastic force effect of spring 4, the outside of the first spring base 41 and the right side of valve body 1
End face offsets, so that the cylindrical portion 21 of spool 2 is located in the centre bore 13a, and first is through-flow by the right end face closure of valve body 1
It is blocked between slot 11 and the second through-flow slot 12, throttle orifice 2a is conducted with the third through flow hole 1c.When fluid from B mouthfuls into
Enter, after entering valve body 1 from third through flow hole 1c, flows out valve body 1 through throttle orifice 2a, the first through-flow slot 11, the first through flow hole 1a, most
It is flowed out eventually from A mouthfuls.
When A mouthfuls of loads become smaller, the pressure difference between B mouthfuls and A mouthfuls increases, and the resultant force acted on spool 2 increases, the first bullet
The outside of spring abutment 41 is limited by the right end of valve body 1, and the outside of second spring seat 42 is limited by nut 31, and pressure difference will push spool
2 are moved to the left, and spool 2 is moved to the left together with guide rod 3, compress spring 4；Spool 2 is moved to the left, and makes the first through-flow slot 11
Aperture reduce, throttle orifice 2a outlet pressure increase, until reaching equilibrium state.If A mouthfuls of loads become larger, between B mouthfuls and A mouthfuls
Pressure difference reduce, the resultant force acted on spool 2 reduces, and spool 2 moves right under force action, makes opening for the first through-flow slot 11
Degree increases, and throttle orifice 2a outlet pressure reduces, until reaching equilibrium state.This guarantees load variation in the case where, B mouthful with
Pressure difference between A mouthfuls is constant, and the flow constant exported by A mouthfuls is constant.
Unidirectional state: as shown in figure 3, fluid enters from A mouthfuls, enter spool 2 through the first through flow hole 1a, the first through-flow slot 11
Cylindrical portion 21 in, due to the throttling action of throttle orifice 2a, make to generate larger pressure difference between A mouthfuls and B mouthfuls, under differential pressure action,
Spool 2 moves right, and until tapered portion 22 and retaining ring 5 offset, at this moment, cylindrical portion 21 is left the centre bore 13a of partition 13, made
First through-flow slot 11 and the second through-flow slot 12 are connected, meanwhile, the first spring base 41 leaves the right side of valve body 1, makes the right side of valve body 1
End face is opened wide.The fluid flowed into this way, a part flow out after the second through flow hole 1b flows out valve body 1 from B mouthfuls, another part warp knuckle
Discharge orifice 2a flows out after flowing out from the right side of valve body 1 from B mouthfuls.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (7)
1. a kind of one-way throttle valve includes valve body (1), it is characterized in that: being provided with the first through-flow slot in the valve body (1)
(11) and the second through-flow slot (12), described first is through-flow to be provided with partition (13) between slot (11) and the second through-flow slot (12),
The first through flow hole (1a) being connected with the described first through-flow slot (11) is offered on the outer wall of the valve body (1), it is described
The second through flow hole (1b) being connected with the described second through-flow slot (12) is also provided on the outer wall of valve body (1)；The valve body
(1) it is provided with the spool (2) that can be moved axially in, is provided with guide rod (3), the guide rod on the spool (2)
(3) be provided on can in guide rod (3) the first spring base (41) and second spring seat (42) in axial sliding, described first
It is provided between spring base (41) and second spring seat (42) spring (4), the guide rod is provided with thread segment on (3)
(3a) is provided with nut (31) on the thread segment (3a), the valve body (1) on the outside of the second spring seat (42)
On offered on the outer wall of the spool (2) two sides third through flow hole (1c), the spool (2) offers throttle orifice
(2a)；When spool (2) is located at left limit, the throttle orifice (2a) is conducted with the third through flow hole (1c), described
It is blocked between first through-flow slot (11) and the second through-flow slot (12), when spool (2) is located at right limit, the throttle orifice
End between (2a) and the third through flow hole (1c), described first is through-flow to lead between slot (11) and the second through-flow slot (12)
It is logical.
2. a kind of one-way throttle valve according to claim 1, it is characterized in that: the spool (2) is by cylindrical portion (21), cone
Shape portion (22) and cylindrical portion (23) are constituted, and the diameter of the cylindrical portion (23) is less than the outer diameter of the cylindrical portion (21), institute
The throttle orifice (2a) stated is set on tapered portion (22).
3. a kind of one-way throttle valve according to claim 2, it is characterized in that: being provided with retaining ring in the valve body (1)
(5), when spool (2) is located at right limit, the tapered portion (22) offsets with the retaining ring (5).
4. a kind of one-way throttle valve according to claim 3, it is characterized in that: in being provided centrally with of the partition (13)
Heart hole (13a), when spool (2) is located at left limit, the cylindrical portion of the spool (2) is located in the centre bore (13a).
5. a kind of one-way throttle valve according to claim 4, it is characterized in that: first through-flow slot (11) inclination is set
It sets.
6. a kind of one-way throttle valve according to claim 5, it is characterized in that: second through-flow slot (12) inclination is set
It sets.
7. a kind of one-way throttle valve according to claim 6, it is characterized in that: the valve body (1) and installation position phase spiral shell
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711392925.5A CN108131479B (en) | 2017-12-21 | 2017-12-21 | A kind of one-way throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711392925.5A CN108131479B (en) | 2017-12-21 | 2017-12-21 | A kind of one-way throttle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108131479A CN108131479A (en) | 2018-06-08 |
| CN108131479B true CN108131479B (en) | 2019-05-28 |
Family
ID=62391043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711392925.5A Active CN108131479B (en) | 2017-12-21 | 2017-12-21 | A kind of one-way throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108131479B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139999A (en) * | 2018-11-07 | 2019-01-04 | 珠海格力电器股份有限公司 | Limit water yield, the throttle valve of good antiscale property, solenoid valve and water purifier |
| CN110671519B (en) * | 2019-10-12 | 2021-04-23 | 浙江奥新仪表有限公司 | Tubular flow control valve |
| CN111173968B (en) * | 2020-02-04 | 2023-04-18 | 浙江欧菲石油设备有限公司 | Check valve |
| CN111810672B (en) * | 2020-07-22 | 2021-07-02 | 宁波方太厨具有限公司 | Check valve and hot water circulation system comprising same |
| CN112555556A (en) * | 2020-10-27 | 2021-03-26 | 中国原子能科学研究院 | Inverted tooth type throttling element |
| CN113803503B (en) * | 2021-09-17 | 2023-04-18 | 沈阳工程学院 | Right-angle hydraulic control one-way valve for internet of things terminal information acquisition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29720625U1 (en) * | 1996-12-16 | 1998-02-12 | Macrifin Spa | Control valve with pressure value display |
| CN202171046U (en) * | 2011-07-25 | 2012-03-21 | 李耀强 | Pressure adjustor |
| CN202510447U (en) * | 2012-04-11 | 2012-10-31 | 依格流体技术（嘉兴）有限公司 | Flow regulating valve |
| CN203686281U (en) * | 2014-01-17 | 2014-07-02 | 安徽金达利液压有限公司 | Ultrahigh-pressure water overflow valve |
| CN204628680U (en) * | 2015-04-20 | 2015-09-09 | 东风汽车公司 | Automobile tailboard constant load pressure-compensated valve |
| CN108223473A (en) * | 2018-01-17 | 2018-06-29 | 邵立坤 | A kind of one way sequence valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070193633A1 (en) * | 2006-02-17 | 2007-08-23 | Conbraco Industries, Inc. | Self-contained check valve module |
-
2017
- 2017-12-21 CN CN201711392925.5A patent/CN108131479B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29720625U1 (en) * | 1996-12-16 | 1998-02-12 | Macrifin Spa | Control valve with pressure value display |
| CN202171046U (en) * | 2011-07-25 | 2012-03-21 | 李耀强 | Pressure adjustor |
| CN202510447U (en) * | 2012-04-11 | 2012-10-31 | 依格流体技术（嘉兴）有限公司 | Flow regulating valve |
| CN203686281U (en) * | 2014-01-17 | 2014-07-02 | 安徽金达利液压有限公司 | Ultrahigh-pressure water overflow valve |
| CN204628680U (en) * | 2015-04-20 | 2015-09-09 | 东风汽车公司 | Automobile tailboard constant load pressure-compensated valve |
| CN108223473A (en) * | 2018-01-17 | 2018-06-29 | 邵立坤 | A kind of one way sequence valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108131479A (en) | 2018-06-08 |
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Effective date of registration: 20190430 Address after: 312000 Xuejiaba, Lanting Town, Keqiao District, Shaoxing City, Zhejiang Province Applicant after: Shaoxing Yake Auto Parts Co., Ltd. Address before: 315000 Room 013, Room 18-1, 035, 555 Juxian Road, Ningbo High-tech Zone, Ningbo City, Zhejiang Province Applicant before: Ningbo Wen fan electrical and Mechanical Technology Development Co., Ltd. |
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