CN108953267B - Flow type balance valve - Google Patents
Flow type balance valve Download PDFInfo
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- CN108953267B CN108953267B CN201810961526.4A CN201810961526A CN108953267B CN 108953267 B CN108953267 B CN 108953267B CN 201810961526 A CN201810961526 A CN 201810961526A CN 108953267 B CN108953267 B CN 108953267B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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Abstract
The invention provides a flow type balance valve comprising: the valve comprises a valve sleeve, an end plug, a bushing, a balance valve core, a first spring, a spring seat, a one-way valve core and a second spring. The flow type balance valve provided by the embodiment of the invention is simple to process, free from sudden change of the flow area and compact in volume.
Description
Technical Field
The present invention relates to a valve assembly for a hydraulic device, and more particularly to a flow-type balancing valve.
Background
In modern mechanical equipment such as engineering machinery, construction machinery and the like, a large number of lifting hydraulic loops are applied, wherein a balance valve is a key hydraulic element for controlling the work of a hydraulic oil cylinder in the lifting loop, and the performance of the balance valve directly influences the performance of a main machine.
The existing hydraulic balance valve has the following defects: when the load is transferred, because the characteristics of sudden change can be produced to hydraulic balance valve port flow area, can make the load produce the phenomenon of low frequency shake and impact, cause the system unstable, influence the fail safe nature of complete machine. The load is transferred and is passed through with when the load rises the same valve port, all can produce the throttling effect, and it is not required the throttling action when the load rises in the reality, seriously influences the efficiency of operation. In order to solve the problem, a check valve is also required to be connected in parallel, and the cost is increased invisibly.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a flow type balance valve which is simple to process, has no sudden change of the flow area and is compact in volume.
A flow-type balancing valve according to an embodiment of the present invention includes:
the valve sleeve is provided with a valve sleeve through hole which is communicated up and down, the valve sleeve through hole comprises a first valve sleeve through hole section, a second valve sleeve through hole section, a third valve sleeve through hole section and a fourth valve sleeve through hole section from top to bottom, the aperture of the first valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section, the aperture of the fourth valve sleeve through hole section is larger than that of the second valve sleeve through hole section, the aperture of the second valve sleeve through hole section is larger than that of the third valve sleeve through hole section, the valve sleeve is provided with a first flow channel, a second flow channel, a throttling hole and a through hole, the inner opening of the first flow channel is positioned on the upper step surface of the second valve sleeve through hole section, the inner opening of the second flow channel is positioned on the inner peripheral wall of the second valve sleeve through hole section and is adjacent to the upper step surface of the third valve sleeve through hole section, and the inner opening of the second flow channel is constructed into a first damping hole, the inner opening of the throttle hole is positioned on the inner peripheral wall of the through hole section of the third valve sleeve, the inner opening of the through hole is positioned on the inner peripheral wall of the through hole section of the fourth valve sleeve and is adjacent to the lower step surface of the through hole section of the third valve sleeve, wherein the outer opening of the first flow passage, the outer opening of the throttle hole and the outer opening of the through hole form a first oil port, and the outer opening of the second flow passage forms a second oil port;
the end plug is arranged on the valve sleeve and used for closing an upper opening of the through hole of the valve sleeve, an end plug blind hole with a downward opening is formed in the end plug, and the aperture of the end plug blind hole is smaller than that of the first valve sleeve through hole section;
the bushing is arranged in the first valve sleeve through hole section, the upper end of the bushing abuts against the lower end face of the end plug, the lower end of the bushing abuts against the lower step face of the first valve sleeve through hole section, and a bushing through hole penetrating in the axial direction is formed in the bushing;
the balance valve core comprises a first balance valve core section matched with the bushing through hole, a second balance valve core section matched with the second valve sleeve through hole section and positioned below the first balance valve core section, and a third balance valve core section matched with the third valve sleeve through hole section and positioned below the second balance valve core section, wherein the first balance valve core section can be matched in the bushing through hole in a vertical sliding mode, the second balance valve core section can be matched in the second valve sleeve through hole section in a vertical sliding mode, the third balance valve core section can be matched in the third valve sleeve through hole section in a vertical sliding mode, the balance valve core is provided with a balance valve core through hole which is communicated up and down, and a third damping hole is arranged on the balance valve core through hole;
a first spring disposed in the end plug blind hole, wherein an upper end of the first spring abuts against a bottom surface of the end plug blind hole and a lower end of the first spring abuts against an upper end surface of the first balanced spool segment, the first spring normally urges the balanced spool downward such that a lower end surface of the second balanced spool segment abuts against an upper step surface of the third sleeve through-hole segment, and at this time, a first predetermined distance is spaced between the upper end surface of the second balanced spool segment and the lower end surface of the bushing, and a lower end of the third balanced spool segment extends downward into the fourth sleeve through-hole segment;
the spring seat is fixedly arranged in the through hole section of the fourth valve sleeve;
the check valve core comprises a main body section which can be matched in the through hole section of the fourth valve sleeve in a vertical sliding manner and a reducing section which is positioned below the main body section and can be matched in the spring seat in a vertical sliding manner, a check valve core through hole which is communicated up and down is formed in the check valve core, the aperture of the check valve core through hole is smaller than that of the through hole section of the third valve sleeve, and a third oil port is formed at the lower end of the check valve core through hole;
the second spring is sleeved on the reducing section, the upper end of the second spring abuts against the lower end face of the main body section, the lower end of the second spring abuts against the spring seat, and the second spring normally pushes the check valve core upwards so that the upper end face of the check valve core abuts against the lower end face of the third balanced valve core section to close the through flow hole;
wherein, in the blind hole of the end plug, a first control cavity is defined between the end plug and the upper end surface of the bushing, in the through hole of the valve sleeve, a second control cavity is defined between the upper end surface of the second balanced valve core segment and the lower end surface of the bushing, the lower end surface of the bushing is provided with a through flow groove for communicating the second control cavity and the first flow passage, and the peripheral wall of the second balanced valve core segment is provided with a third control cavity matched with the first damping hole;
when the axial cross-sectional area of the through hole of the check valve core is S1, the axial cross-sectional area of the through hole of the bushing is S2, and the axial cross-sectional area of the through hole section of the second valve sleeve is S3, S1> S2 is satisfied among S1, S2 and S3, and (S3-S2)/(S1-S2) > 3.
Advantageously, the balance valve further comprises a retainer ring, and the retainer ring is embedded in the inner wall of the through hole section of the fourth valve sleeve to fix the spring seat.
Advantageously, the throttle bore is arranged in a plurality of turns in the axial direction of the third sleeve through-hole section, each turn having a plurality of throttle bores arranged at regular intervals in the circumferential direction of the third sleeve through-hole section.
Advantageously, the end plug is threadedly connected with the upper end of the valve housing through hole.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a balanced valve according to one embodiment of the invention;
FIG. 2 is a hydraulic schematic of a balancing valve according to one embodiment of the present invention;
FIG. 3 is a hydraulic schematic of one application scenario of a balancing valve according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A balance valve according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a balance valve according to an embodiment of the present invention includes: the valve sleeve comprises a valve sleeve 1, an end plug 2, a bushing 3, a balance valve core 4, a first spring 5, a spring seat 6, a one-way valve core 7 and a second spring 8.
Specifically, the valve housing 1 has a housing through hole penetrating vertically. The valve sleeve through hole comprises a first valve sleeve through hole section, a second valve sleeve through hole section, a third valve sleeve through hole section and a fourth valve sleeve through hole section from top to bottom. The aperture of the first valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section, the aperture of the fourth valve sleeve through hole section is larger than that of the second valve sleeve through hole section, and the aperture of the second valve sleeve through hole section is larger than that of the third valve sleeve through hole section. The valve housing 1 has a first flow passage 101, a second flow passage 102, a throttle hole 103, and a through-flow hole 104, all of which have outer openings on the outer peripheral wall of the valve housing 1. The inner opening of the first flow channel 101 is located on the upper step surface of the second valve sleeve through hole section, the inner opening of the second flow channel 102 is located on the inner peripheral wall of the second valve sleeve through hole section and is adjacent to the upper step surface of the third valve sleeve through hole section, the inner opening of the second flow channel 102 is configured into a first damping hole 105, the inner opening of a throttle hole 103 is located on the inner peripheral wall of the third valve sleeve through hole section, and the inner opening of a through hole 104 is located on the inner peripheral wall of the fourth valve sleeve through hole section and is adjacent to the lower step surface of the third valve sleeve through hole section. The outer opening of the first flow passage 101, the outer opening of the orifice 103, and the outer opening of the through-flow hole 104 constitute a first port V, and the outer opening of the second flow passage 102 constitutes a second port X. Advantageously, the throttle bore 103 is arranged in a plurality of turns in the axial direction of said third sleeve through-bore section, each turn having a plurality of throttle bores 103 arranged at regular intervals in the circumferential direction of said third sleeve through-bore section.
The end plug 2 is arranged on the valve sleeve 1 and used for sealing an upper opening of the through hole of the valve sleeve, an end plug blind hole with a downward opening is formed in the end plug 2, and the aperture of the end plug blind hole is smaller than that of the first valve sleeve through hole section. Advantageously, an end plug 2 is screwed to the upper end of the through bore of the valve housing.
The bush 3 is established in the first valve barrel through-hole section, 3 upper ends of bush with end plug 2 lower terminal surface offsets, 3 lower extremes of bush with the lower step face of first valve barrel through-hole section offsets, the bush through-hole that has the axial to run through in the bush 3.
The balanced valve core 4 comprises a first balanced valve core section matched with the bushing through hole, a second balanced valve core section matched with the second valve sleeve through hole section and positioned below the first balanced valve core section, and a third balanced valve core section matched with the third valve sleeve through hole section and positioned below the second balanced valve core section, wherein the first balanced valve core section can be matched in the bushing through hole in a vertical sliding mode, the second balanced valve core section can be matched in the second valve sleeve through hole section in a vertical sliding mode, the third balanced valve core section can be matched in the third valve sleeve through hole section in a vertical sliding mode, the balanced valve core 4 is provided with a balanced valve core through hole 401 which is communicated up and down, and a third damping hole 402 is arranged on the balanced valve core through hole 401.
A first spring 5 is arranged in the end plug blind hole, the upper end of the first spring 5 abuts against the bottom surface of the end plug blind hole, the lower end of the first spring 5 abuts against the upper end surface of the first balanced valve core section, the first spring 5 normally pushes the balanced valve core 4 downwards to enable the lower end surface of the second balanced valve core section to abut against the upper step surface of the third valve sleeve through hole section, at this time, a first preset distance is reserved between the upper end surface of the second balanced valve core section and the lower end surface of the bushing, and the lower end of the third balanced valve core section extends downwards into the fourth valve sleeve through hole section.
And the spring seat 6 is fixedly arranged in the through hole section of the fourth valve sleeve. Advantageously, the flow-type balance valve further comprises a retainer ring 9, and the retainer ring 9 is embedded on the inner wall of the through hole section of the fourth valve sleeve to fix the spring seat 6.
The check valve core 7 comprises a main body section which can be matched in the through hole section of the fourth valve sleeve in a vertically sliding manner and a reducing section which is positioned below the main body section and can be matched in the spring seat 6 in a vertically sliding manner, a check valve core through hole 701 which is communicated up and down is arranged on the check valve core 7, the aperture of the check valve core through hole 701 is smaller than that of the through hole section of the third valve sleeve, and a third oil port C is formed at the lower end of the check valve core through hole 701.
The second spring 8 is sleeved on the reducing section, the upper end of the second spring 8 abuts against the lower end face of the main body section, the lower end of the second spring 8 abuts against the spring seat 6, and the second spring 8 normally pushes the check valve spool 7 upwards to enable the upper end face of the check valve spool 7 to abut against the lower end face of the third balanced valve spool section so as to close the through flow hole 104.
Wherein, in the end plug blind hole, a first control cavity 1a is defined between the end plug 2 and the upper end surface of the bush 3, in the valve sleeve through hole, a second control cavity 1b is defined between the upper end surface of the second balanced valve core segment and the lower end surface of the bush 3, the lower end surface of the bush 3 is provided with a through flow groove 31 for communicating the second control cavity 1b and the first flow passage 101, and the outer peripheral wall of the second balanced valve core segment is provided with a third control cavity 1c matched with the first damping hole 105.
When the axial cross-sectional area of the through hole of the check valve core is S1, the axial cross-sectional area of the through hole of the bushing is S2, and the axial cross-sectional area of the through hole section of the second valve sleeve is S3, S1> S2 is satisfied among S1, S2 and S3, and (S3-S2)/(S1-S2) > 3.
The operation of the balancing valve according to the embodiment of the present invention will be briefly described.
As shown in fig. 3, in application, the first port V is connected to the port a of the directional control valve 10, the third port C is connected to the rodless chamber of the hydraulic cylinder 11, and the second port X and the rod chamber of the hydraulic cylinder 11 are both connected to the port B of the directional control valve 10.
(1) During the ascending process, the pressure oil of the reversing valve 10 reaches the first port V of the balance valve, and a part of the pressure oil of the first port V enters the first control chamber 1a through the first flow passage 101, so that the balance valve element 4 maintains the position shown in fig. 1, and the orifice 103 is closed by the balance valve element 4. The other part of the pressure oil of the first port V pushes the check valve core 7 to move downwards through the through-flow hole 104 and overcome the acting force of the second spring 8 to open the valve port, and the oil flows into the third port C through the first port V to reach the rodless cavity of the hydraulic cylinder 11, so as to push the hydraulic cylinder 11 to move upwards. The oil in the stage flows from the first port V to the third port C without throttling.
(2) In the descending process, the reversing valve 10 reverses, pressure oil of the second oil port X enters the third control cavity 1C through the first damping hole 105 and acts on the balance valve core 4, the acting force of the first spring 5 is overcome, the balance valve core 4 moves upwards, the conical surface sealing surface is opened firstly, and meanwhile, the check valve core 2 moves upwards to abut against the step surface to block the through flow hole 104 and the third oil port C. The pressure of the second port X increases and the balanced valve core 4 moves further upward to gradually expose each orifice 103 which is previously covered by the diameter, so that the flow area is moderately increased and the load lowering speed can be accurately controlled. The gradual change of the flow area is realized by gradual communication of the drill holes, and the processing cost is low and is easy to control.
(3) And in the stopping process, the pressure of the second oil port X is reduced, the first spring 5 pushes the balance valve core 4 to move downwards, the overflowing area is gradually reduced, and the valve port is closed.
(4) In the stopping process, when the load pressure has large impact due to the action of external force, the hydraulic oil of the pressure of the third oil port C acts on the annular acting area (S1-S2) of the balance valve core 4, and if the impact pressure exceeds the acting force of the first spring 5, the balance valve core 4 quickly opens the throttle hole 103 to buffer the pressure impact.
That is, (1) the orifices 103 are arranged in a plurality of circles along the axial direction of the third sleeve through hole section, each circle is provided with a plurality of orifices 103 which are evenly arranged along the circumferential direction of the third sleeve through hole section, when the balance valve core 4 moves upwards to open the valve port, the orifices 103 can be opened in sequence, and through reasonable hole diameter size and axial interval configuration, the change of flow area can be accurately controlled, so that the flow can be accurately controlled. (2) When the load rises, the valve port between the through hole 104, the check valve core 7 and the balance valve core 4 passes through; when the load is reduced, the balance valve core 4 and the throttling hole 103 pass; in this way the speed of the load when it is rising is not affected, while the speed of the descent when it is descending can be controlled by throttling.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the embodiments without departing from the scope of the present invention.
Claims (3)
1. A flow-type balancing valve, comprising:
the valve sleeve is provided with a valve sleeve through hole which is communicated up and down, the valve sleeve through hole comprises a first valve sleeve through hole section, a second valve sleeve through hole section, a third valve sleeve through hole section and a fourth valve sleeve through hole section from top to bottom, the aperture of the first valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section, the aperture of the fourth valve sleeve through hole section is larger than that of the second valve sleeve through hole section, the aperture of the second valve sleeve through hole section is larger than that of the third valve sleeve through hole section, the valve sleeve is provided with a first flow channel, a second flow channel, a throttling hole and a through hole, the inner opening of the first flow channel is positioned on the upper step surface of the second valve sleeve through hole section, the inner opening of the second flow channel is positioned on the inner peripheral wall of the second valve sleeve through hole section and is adjacent to the upper step surface of the third valve sleeve through hole section, and the inner opening of the second flow channel is constructed into a first damping hole, the inner opening of the throttle hole is positioned on the inner peripheral wall of the through hole section of the third valve sleeve, the inner opening of the through hole is positioned on the inner peripheral wall of the through hole section of the fourth valve sleeve and is adjacent to the lower step surface of the through hole section of the third valve sleeve, wherein the outer opening of the first flow passage, the outer opening of the throttle hole and the outer opening of the through hole form a first oil port, and the outer opening of the second flow passage forms a second oil port;
the end plug is arranged on the valve sleeve and used for closing an upper opening of the through hole of the valve sleeve, an end plug blind hole with a downward opening is formed in the end plug, and the aperture of the end plug blind hole is smaller than that of the first valve sleeve through hole section;
the bushing is arranged in the first valve sleeve through hole section, the upper end of the bushing abuts against the lower end face of the end plug, the lower end of the bushing abuts against the lower step face of the first valve sleeve through hole section, and a bushing through hole penetrating in the axial direction is formed in the bushing;
the balance valve core comprises a first balance valve core section matched with the bushing through hole, a second balance valve core section matched with the second valve sleeve through hole section and positioned below the first balance valve core section, and a third balance valve core section matched with the third valve sleeve through hole section and positioned below the second balance valve core section, wherein the first balance valve core section can be matched in the bushing through hole in a vertical sliding mode, the second balance valve core section can be matched in the second valve sleeve through hole section in a vertical sliding mode, the third balance valve core section can be matched in the third valve sleeve through hole section in a vertical sliding mode, the balance valve core is provided with a balance valve core through hole which is communicated up and down, and a third damping hole is arranged on the balance valve core through hole;
a first spring disposed in the end plug blind hole, wherein an upper end of the first spring abuts against a bottom surface of the end plug blind hole and a lower end of the first spring abuts against an upper end surface of the first balanced spool segment, the first spring normally urges the balanced spool downward such that a lower end surface of the second balanced spool segment abuts against an upper step surface of the third sleeve through-hole segment, and at this time, a first predetermined distance is spaced between the upper end surface of the second balanced spool segment and the lower end surface of the bushing, and a lower end of the third balanced spool segment extends downward into the fourth sleeve through-hole segment;
the spring seat is fixedly arranged in the through hole section of the fourth valve sleeve;
the check valve core comprises a main body section which can be matched in the through hole section of the fourth valve sleeve in a vertical sliding manner and a reducing section which is positioned below the main body section and can be matched in the spring seat in a vertical sliding manner, a check valve core through hole which is communicated up and down is formed in the check valve core, the aperture of the check valve core through hole is smaller than that of the through hole section of the third valve sleeve, and a third oil port is formed at the lower end of the check valve core through hole;
the second spring is sleeved on the reducing section, the upper end of the second spring abuts against the lower end face of the main body section, the lower end of the second spring abuts against the spring seat, and the second spring normally pushes the check valve core upwards so that the upper end face of the check valve core abuts against the lower end face of the third balanced valve core section to close the through flow hole;
wherein, in the blind hole of the end plug, a first control cavity is defined between the end plug and the upper end surface of the bushing, in the through hole of the valve sleeve, a second control cavity is defined between the upper end surface of the second balanced valve core segment and the lower end surface of the bushing, the lower end surface of the bushing is provided with a through flow groove for communicating the second control cavity and the first flow passage, and the peripheral wall of the second balanced valve core segment is provided with a third control cavity matched with the first damping hole;
when the axial cross-sectional area of the through hole of the one-way valve core is S1, the axial cross-sectional area of the through hole of the bushing is S2, and the axial cross-sectional area of the through hole section of the second valve sleeve is S3, S1 is greater than S2 among S1, S2 and S3, and (S3-S2)/(S1-S2) > 3;
the throttle holes are arranged in a plurality of circles along the axial direction of the third valve sleeve through hole section, and each circle is provided with a plurality of throttle holes which are evenly arranged at intervals along the circumferential direction of the third valve sleeve through hole section;
when the oil liquid flows into the third oil port from the first oil port, one part of the pressure oil of the first oil port enters the second control cavity through the first flow passage, so that the balance valve core moves downwards to close the throttle hole, the other part of the pressure oil of the first oil port pushes the one-way valve core to move downwards through the through hole to overcome the acting force of the second spring to open the valve port, and the oil liquid flows into the third oil port from the first oil port through the through hole;
when oil flows into the first oil port from the third oil port, pressure oil of the second oil port enters the third control cavity through the first damping hole and acts on the balance valve core, the balance valve core is pushed to overcome acting force of the first spring to move upwards, meanwhile, the one-way valve core moves upwards to abut against the step surface to block the through-flow hole and the third oil port, pressure of the second oil port is increased, the balance valve core further moves upwards, the throttling holes which are covered by the diameters before are gradually exposed, and the oil flows into the first oil port through the exposed throttling holes from the third oil port.
2. The flow balance valve of claim 1 further comprising a retainer ring embedded in an inner wall of said fourth valve housing through bore section to retain said spring seat.
3. A flow balance valve according to claim 1 or 2, wherein said end plug is threadedly connected to an upper end of said valve housing through bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961526.4A CN108953267B (en) | 2018-08-22 | 2018-08-22 | Flow type balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810961526.4A CN108953267B (en) | 2018-08-22 | 2018-08-22 | Flow type balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108953267A CN108953267A (en) | 2018-12-07 |
| CN108953267B true CN108953267B (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810961526.4A Active CN108953267B (en) | 2018-08-22 | 2018-08-22 | Flow type balance valve |
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| CN (1) | CN108953267B (en) |
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| CN108167252A (en) * | 2017-12-26 | 2018-06-15 | 邵立坤 | Plug-in threeway one-way speed-regulating valve |
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| CN202176567U (en) * | 2011-08-17 | 2012-03-28 | 浙江圣邦机械有限公司 | Balance valve |
| CN102996556A (en) * | 2012-12-04 | 2013-03-27 | 怀特(中国)驱动产品有限公司 | Direct-acting type hydraulic threaded cartridge balanced valve |
| CN105952702B (en) * | 2016-06-20 | 2018-04-13 | 宁波市镇海天地液压有限公司 | A kind of balanced valve |
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