CN109058216B - Balance valve - Google Patents
Balance valve Download PDFInfo
- Publication number
- CN109058216B CN109058216B CN201811105309.1A CN201811105309A CN109058216B CN 109058216 B CN109058216 B CN 109058216B CN 201811105309 A CN201811105309 A CN 201811105309A CN 109058216 B CN109058216 B CN 109058216B
- Authority
- CN
- China
- Prior art keywords
- section
- valve
- valve core
- hole
- hole section
- 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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
-
- 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
-
- 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
- F15B13/029—Counterbalance valves
Abstract
A balanced valve according to an embodiment of the invention comprises: the valve comprises a valve body, a valve sleeve, a balance valve core, a first spring seat, a first spring, a one-way valve core, a second spring seat and a second spring. The balance valve provided by the embodiment of the invention can meet the stability requirement, can reduce the hydraulic control pressure under the no-load working condition when the valve is fully opened, and has a great energy-saving effect.
Description
Technical Field
The present invention relates to a valve assembly for a hydraulic device, and in particular to a balanced 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. Since the balancing valve mainly increases the back pressure and the set pressure is usually 30% -50% greater than the maximum load, the balancing valve is an energy consuming element in the system and is stabilized by the consumption of power. At present, all the existing balance valves adopt fixed hydraulic control ratios, and the balance valves with corresponding hydraulic control ratios are selected according to working conditions when a host is actually applied. For example: the hydraulic control ratio of the existing balance valve is 3:1, 8:1, 10:1 and the like, if the actual working condition has larger load change and has higher requirement on stability, the balance valve with lower hydraulic control ratio is generally selected, for example, 3: 1; if the actual working condition has small load change and lower stability requirement, and the working condition requires energy saving, a balance valve with a higher pilot control ratio is generally selected, such as 8:1 or 10: 1. The balance valve with the fixed hydraulic control ratio has communicated displacement of the balance valve core, and the balance valve control port with the low hydraulic control ratio needs to increase pressure which is larger than that of the balance valve with the high hydraulic control ratio, so that the displacement amount of the balance valve core of the balance valve with the low hydraulic control ratio is small, namely the fluctuation is small under the condition that the pressure fluctuation amplitudes of the control ports are the same, and the balance valve with the low hydraulic control ratio is generally selected for the working condition with high stability requirement. However, there are some disadvantages to the low pilot ratio balancing valve, such as the pilot port also needs a large pressure to fully open the balancing valve when the load becomes small or no load, which results in unnecessary wasted work output and energy waste.
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 variable hydraulic control ratio balance valve which can meet the stability requirement and reduce the hydraulic control pressure in the full opening under the no-load working condition.
A balanced valve according to an embodiment of the invention comprises:
the valve body is provided with a valve body blind hole with a right opening, and the side wall of the valve body is provided with a first oil port communicated with the valve body blind hole;
the valve sleeve is fixedly inserted into the right end of the valve body blind hole at the left end, a valve sleeve through hole which is communicated from left to right is formed in the valve sleeve, 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, a fourth valve sleeve through hole section, a fifth valve sleeve through hole section and a sixth valve sleeve through hole section from left to right, the aperture of the first 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 aperture of the fourth valve sleeve through hole section is between that of the first valve sleeve through hole section and that of the second valve sleeve through hole section, the aperture of the fifth valve sleeve through hole section is equal to that of the third valve sleeve through hole section, the aperture of the sixth valve sleeve through hole section is between that of the first valve sleeve through hole section and that of the second valve sleeve through hole section, and the aperture of the sixth valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section The valve comprises a valve body blind hole, a valve sleeve, a valve body cover, a valve rod, a;
a balance valve core, which comprises a first balance valve core section which is fitted in the first valve sleeve through hole section in a left-right sliding manner, a second balance valve core section which is fitted in the second valve sleeve through hole section in a left-right sliding manner, a third balance valve core section which is fitted in the third valve sleeve through hole section in a left-right sliding manner, a fourth balance valve core section which is fitted in the fifth valve sleeve through hole section in a left-right sliding manner, and a connecting section which is positioned between the third balance valve core section and the fourth balance valve core section, wherein the diameter of the connecting section is smaller than that of the third balance valve core section, the balance valve core is provided with a valve core through hole which is communicated left and right, the valve core through hole comprises a first valve core through hole section, a second valve core through hole section, a third valve core through hole section and a fourth valve core through hole section from left to right, the aperture of the first valve core through hole section is larger than that of the second valve core through hole section, the aperture of the second valve core through hole section is larger than that of the third valve core through hole section, and the aperture of the fourth valve core through hole section is between that of the first valve core through hole section and that of the second valve core through hole section;
the first spring seat is arranged in the blind hole of the valve body, the section of the first spring seat is in a shape like the Chinese character 'ji', the left end surface of a vertical limb of the first spring seat abuts against the bottom surface of the blind hole of the valve body, the right end of a horizontal limb of the first spring seat extends rightwards into the left end of the through hole section of the first valve core, and the diameter of the horizontal limb of the first spring seat is smaller than that of the through hole section of the first valve core;
the first spring is sleeved on a horizontal limb of the first spring seat, the left end of the first spring is abutted against the right end face of a vertical limb of the first spring seat, the right end of the first spring is abutted against the left end face of the valve seat, the first spring is used for normally pushing the balance valve core to enable the right end face of the second balance valve core section to be abutted against the left step face of the third valve sleeve through hole section, at the moment, the left end face of the balance valve core is flush with the left end face of the valve sleeve, the right end face of the first balance valve core section and the left step face of the second valve sleeve through hole section are separated by a first preset distance to define a first control cavity, and the right end of the fourth balance valve core section extends into the sixth valve sleeve through hole section, the balance valve comprises a first balance valve core section, a second balance valve core section and a valve sleeve, wherein a peripheral wall of the first balance valve core section is provided with a second through-flow groove, a side wall of the first balance valve core section is provided with a first flow channel communicated with the first control cavity and the second through-flow groove, the valve sleeve is provided with a second flow channel communicated with the spring cavity and the second through-flow groove, a left side wall of the second through-flow groove is tangent to the left side of an opening of the second through-flow groove towards the second flow channel, the right end of the second balance valve core section is provided with a notch communicated with the first through-flow hole, the notch extends towards the left from the right end of the second balance valve core section, a second control cavity is limited between the notch and the valve sleeve, the balance valve core is provided with a second through-flow hole communicated with the peripheral surface of the connecting section and the second valve core through-hole section, and the balance valve core is provided with a third through-flow hole communicated with the fourth, a second preset distance is arranged between the left side wall of the notch and the right step surface of the through hole section of the first valve sleeve, and the second preset distance is equal to the width of the second through-flow groove in the left-right direction;
the one-way valve core comprises a head section and a sliding section positioned on the left side of the head section, the sliding section can be matched in the third valve core through hole section in a left-right sliding mode, the left side of the sliding section extends into the first valve core through hole section leftwards, and the diameter of the head section is larger than the aperture of the fourth valve core through hole section and is positioned on the right side of the fourth balanced valve core section;
the second spring seat is fixedly arranged at the left end of the sliding section;
the second spring is sleeved on the sliding section, the left end of the second spring abuts against the second spring seat, the right end of the second spring abuts against the left step face of the third valve core through hole section, the second spring normally pulls the one-way valve core leftwards to enable the end head section to normally close the right opening of the fourth valve core through hole section, at the moment, the left end face of the sliding section and the right end face of the horizontal limb of the first spring seat are separated by a third preset distance, and the third preset distance is smaller than the second preset distance.
Advantageously, the balance valve further comprises a retainer ring fixedly sleeved on the left end of the sliding section so that the second spring seat is fixed on the left end of the sliding section.
Advantageously, the left end of the end head section is configured in a circular truncated cone shape with the diameter increasing from left to right.
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 view of a balancing 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 balanced valve according to an embodiment of the present invention is 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 comprises a valve body 4, a valve sleeve 1, a balance valve core 3, a first spring seat 8, a first spring 7, a one-way valve core 2, a second spring seat 5 and a second spring 6.
Specifically, the valve body 4 is provided with a valve body blind hole with a rightward opening, and the side wall of the valve body 4 is provided with a first oil port X communicated with the valve body blind hole.
The left end of the valve sleeve 1 is fixedly inserted into the right end of the blind hole of the valve body, and the valve sleeve 1 is provided with a valve sleeve through hole which is communicated from left to right. 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, a fourth valve sleeve through hole section, a fifth valve sleeve through hole section and a sixth valve sleeve through hole section from left to right. The aperture of the first 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 aperture of the fourth valve sleeve through hole section is between the aperture of the first valve sleeve through hole section and that of the second valve sleeve through hole section, the aperture of the fifth valve sleeve through hole section is equal to that of the third valve sleeve through hole section, the aperture of the sixth valve sleeve through hole section is between that of the first valve sleeve through hole section and that of the second valve sleeve through hole section, and the aperture of the sixth valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section. The side wall of the valve sleeve 1 is provided with a first through flow groove 103 for communicating the first oil port X, the side wall of the valve sleeve 1 is provided with a first through flow hole 101 for communicating the first through flow groove 103 with the through hole section of the second valve sleeve, the side wall of the valve sleeve 1 is provided with a second oil port V for communicating the through hole section of the fourth valve sleeve, and the right opening of the through hole of the valve sleeve forms a third oil port C. In the valve body blind hole, a spring cavity 4a is defined between the left end surface of the valve sleeve 1 and the bottom surface of the valve body blind hole.
The balanced valve core 3 includes a first balanced valve core section slidably fitted in the first valve housing through hole section in the left-right direction, a second balanced valve core section slidably fitted in the second valve housing through hole section in the left-right direction, a third balanced valve core section slidably fitted in the third valve housing through hole section in the left-right direction, a fourth balanced valve core section slidably fitted in the fifth valve housing through hole section in the left-right direction, and a connecting section between the third balanced valve core section and the fourth balanced valve core section, the diameter of the connecting section being smaller than that of the third balanced valve core section. The balance valve core 3 is provided with a valve core through hole which is through from left to right, and the valve core through hole comprises a first valve core through hole section, a second valve core through hole section, a third valve core through hole section and a fourth valve core through hole section from left to right. The aperture of the first valve core through hole section is larger than that of the second valve core through hole section, the aperture of the second valve core through hole section is larger than that of the third valve core through hole section, and the aperture of the fourth valve core through hole section is between the aperture of the first valve core through hole section and the aperture of the second valve core through hole section.
The first spring seat 8 is arranged in the valve body blind hole, the cross section of the first spring seat 8 is constructed in a 'containing' shape, the left end face of the vertical limb of the first spring seat 8 abuts against the bottom face of the valve body blind hole, the right end of the horizontal limb of the first spring seat 8 extends rightwards into the left end of the first valve core through hole section, and the diameter of the horizontal limb of the first spring seat 8 is smaller than that of the first valve core through hole section.
The outer diameter of the first spring 7 is larger than the aperture of the first valve housing through hole section and the inner diameter of the first spring 7 is smaller than the aperture of the first valve housing through hole section. The first spring 7 is sleeved on a horizontal limb of the first spring seat 8, the left end of the first spring 7 abuts against the right end face of a vertical limb of the first spring seat 8, and the right end of the first spring 7 abuts against the left end face of the valve sleeve 1. The first spring 7 is used for normally pushing the balance valve core 3 to the right so that the right end face of the second balance valve core section abuts against the left step face of the third valve sleeve through hole section. At this time, the left end surface of the balanced valve core 3 is flush with the left end surface of the valve sleeve 1, the right end surface of the first balanced valve core section is separated from the left step surface of the second valve sleeve through hole section by a first preset distance to define a first control cavity 1b, and the right end of the fourth balanced valve core section extends into the sixth valve sleeve through hole section. The outer peripheral wall of the first balanced valve core section is provided with a second through flow groove 31, the side wall of the first balanced valve core section is provided with a first flow channel 32 communicating the first control cavity 1b with the second through flow groove 31, the valve sleeve 1 is provided with a second flow channel 102 communicating the spring cavity 4a with the second through flow groove 31, the left side wall of the second through flow groove 31 is tangent to the left side of the opening of the second flow channel 102 facing the second through flow groove 31, the right end of the second balanced valve core section is provided with a notch 35 communicating with the first through flow hole 101, the notch 35 extends towards the left from the right end of the second balanced valve core section, a second control cavity 1a is defined between the notch 35 and the valve sleeve 1, the balanced valve core 3 is provided with a second through flow hole 34 communicating the outer peripheral surface of the connecting section with the through flow hole section of the second valve core, the balanced valve core 3 is provided with a third through flow hole 33 communicating the through flow hole sections of the fourth valve sleeve and the fourth valve core, a second preset distance is arranged between the left side wall of the notch 35 and the right step surface of the through hole section of the first valve sleeve, and the second preset distance is equal to the width of the second through-flow groove 31 in the left-right direction.
The one-way valve core 2 comprises a head section and a sliding section positioned on the left side of the head section, the sliding section can be matched in the third valve core through hole section in a left-right sliding mode, the left side of the sliding section extends into the first valve core through hole section leftwards, and the diameter of the head section is larger than the aperture of the fourth valve core through hole section and is positioned on the right side of the fourth balanced valve core section. Advantageously, the left end of the end head section is configured in a circular truncated cone shape with the diameter increasing from left to right.
And a second spring seat 5 is fixedly arranged at the left end of the sliding section. Advantageously, the balancing valve further comprises a retainer ring 5a, the retainer ring 5a being fixedly sleeved on the left end of the sliding section so that the second spring seat 5 is fixed on the left end of the sliding section.
The second spring 6 is sleeved on the sliding section, the left end of the second spring 6 abuts against the second spring seat 5, the right end of the second spring 6 abuts against the left step face of the third valve core through hole section, and the second spring 6 normally pulls the one-way valve core 2 leftwards to enable the end head section to normally close the right opening of the fourth valve core through hole section. At this time, the left end surface of the sliding section is spaced from the right end surface of the horizontal limb of the first spring seat 8 by a third predetermined distance, which is smaller than the second predetermined distance.
In other words, a balanced valve according to an embodiment of the invention comprises: the valve comprises a valve body 4, a valve sleeve 1, a balance valve core 3, a first spring seat 8, a first spring 7, a one-way valve core 2, a second spring seat 5 and a second spring 6. Wherein, a second control cavity 1a and a first control cavity 1b are formed between the balance valve core 3 and the valve sleeve 1, and the balance valve core 3 is opened in two stages. The first port X is always communicated with the second control chamber 1a through the first through-flow hole 101, the first control chamber 1b is communicated with the second port V through the first flow passage 32, the second through-flow groove 31, the second flow passage 102, the spring chamber 4a and the second through-flow hole 34 in the first stage of the motion of the balanced valve spool 3, and the first control chamber 1b is communicated with the second control chamber 1a through the notch 35 in the second stage of the opening of the balanced valve spool 3. Therefore, in the first stage, the oil in the first oil port X enters the first control cavity 1b and acts on the first balanced valve core section of the balanced valve core 3, and the hydraulic control ratio is low at this time; in the second stage, the pressure of the first oil port X simultaneously enters the second control chamber 1a and the first control chamber 1b, and acts on the first balanced spool section and the second balanced spool section of the balanced spool 3, and at this time, the hydraulic control is relatively large.
When the load needs to be controlled to descend, namely when the oil flows into the second oil port V from the third oil port C, the motion of the balance valve core 3 is divided into 2 stages, which is specifically as follows:
the first stage is as follows: the first oil port X is used for feeding oil, the oil enters the second control chamber 1a through the first through hole 101 from the first oil port X, and acts on the second balanced valve core section of the balanced valve core 3 to push the balanced valve core 3 to move leftward against the acting force of the first spring 7, the balanced valve core 3 moves leftward and can simultaneously drive the check valve core 2 to move leftward until the left end face of the check valve core 2 abuts against the right end face of the first spring seat 8, the check valve core 2 cannot move leftward when the balanced valve core 3 continues to move leftward, so that a valve port between the balanced valve core 3 and the check valve core 2 is opened, and when the balanced valve core 3 moves leftward to a critical point where the second control chamber 1a is communicated with the first control chamber 1b (i.e., moves leftward from the position of fig. 1 until the left side wall of the notch 35 is flush with the right step face of the through hole section of the first valve core), the first stage is ended. In the first stage movement process, the pressure of the first oil port X acts on the second balanced valve core section of the balanced valve core 3, and the sectional area of the second balanced valve core section is smaller, so that the hydraulic control in the first stage is smaller, the balanced valve core 3 has higher stability, and the movement stability when the load of the third oil port C is larger can be ensured. In the first stage, the first control chamber 1b is communicated with the second port V through the first flow passage 32, the second flow passage 31, the second flow passage 102, the spring chamber 4a and the second through-flow hole 34.
And a second stage: and (3) continuing increasing the pressure value of the first oil port X, continuing moving the balance valve core 3 leftwards, moving the balance valve core leftwards from the position of fig. 1 until the left side wall of the notch 35 leftwards passes over the right step surface of the first valve core through hole section, and entering a second stage. At this stage, the pressure value of the first port X enters the first control chamber 1b through the notch 35 and acts on the first balanced spool section, and the second flow passage 102 is disconnected from the second flow passage 31, so that the acting area of the first port X pressure on the balanced spool 3 at the second stage is the sum of the sectional area of the first balanced spool section and the sectional area of the second balanced spool section, and the sectional area of the first balanced spool section is relatively large, so the hydraulic control of the present invention at the second stage is relatively large. The advantage of this is that, to the operating mode that no load or load are lower, the pressure that makes the first hydraulic fluid port X that balanced case 3 is whole opened can be reduced, can reduce the pressure of first hydraulic fluid port X like this for prior art, produces energy-conserving effect.
For example, if the pilot-operated ratio of the balance valve is 3:1 and the set pressure is 32MPA in the prior art, if the set pressure is 36MPA (the set pressure is increased due to the compression of the spring) after the balance valve is fully opened, the pilot-operated port pressure is required to be 36/3 ═ 12, but according to the present invention, the pilot-operated ratio of the first stage is 3:1 and the pilot-operated ratio of the second stage is 8:1, the balance valve element 3 can be kept loaded stably in a certain opening during the first stage movement, and the pressure of the first port X can be controlled to directly operate to the second stage for the no-load or low-load working condition, so that the pressure 36/8 ═ 4.5 of the first port X when the balance valve element 3 is fully opened is much lower than the pressure of the pilot-operated port in the prior art, thereby saving energy.
The operation of the balancing valve according to the embodiment of the present invention will be briefly described.
As shown in fig. 3, the second port V is connected to the port a of the directional control valve 9, the third port C is connected to the rodless chamber of the hydraulic cylinder 10, and the first port X is connected to the port B of the rod chamber uniform directional control valve 9 of the hydraulic cylinder 10.
The working process of the balance valve according to the embodiment of the invention is divided into 3 processes of ascending, stopping and descending.
(1) In the ascending process, the pressure oil of the reversing valve 9 reaches the second oil port V, the pressure oil of the second oil port V pushes the check valve core 2 to move rightwards to overcome the acting force of the second spring 6 of the check valve to open the valve port, and the pressure oil flows into the third oil port C through the second oil port V to reach the rodless cavity of the hydraulic cylinder 10 and push the hydraulic cylinder 10 to ascend.
(2) In the descending process, the reversing valve 9 reverses, the pressure oil of the first oil port X acts on the balance valve core 3 according to the process, the balance valve core 3 is controlled to move leftwards according to the pressure of the first oil port X in two stages, the valve port between the second oil port V and the third oil port C is opened, and the load descends in the control process.
(3) And in the stopping process, the pressure of the first oil port X is reduced, the balance valve core 3 is pushed to move rightwards under the action of the first spring 7, the valve port is closed, and the second oil port V and the third oil port C are closed and are not communicated.
According to the above description, the balance valve according to the embodiment of the present invention has the following beneficial effects: compared with the prior art, the invention can reduce the pressure of the first oil port X on the premise of not influencing the load stability control, and has the advantages of small load or much smaller opening pressure during control than that of the prior art, thereby having great energy-saving effect.
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 balanced valve, comprising:
the valve body is provided with a valve body blind hole with a right opening, and the side wall of the valve body is provided with a first oil port communicated with the valve body blind hole;
the valve sleeve is fixedly inserted into the right end of the valve body blind hole at the left end, a valve sleeve through hole which is communicated from left to right is formed in the valve sleeve, 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, a fourth valve sleeve through hole section, a fifth valve sleeve through hole section and a sixth valve sleeve through hole section from left to right, the aperture of the first 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 aperture of the fourth valve sleeve through hole section is between that of the first valve sleeve through hole section and that of the second valve sleeve through hole section, the aperture of the fifth valve sleeve through hole section is equal to that of the third valve sleeve through hole section, the aperture of the sixth valve sleeve through hole section is between that of the first valve sleeve through hole section and that of the second valve sleeve through hole section, and the aperture of the sixth valve sleeve through hole section is larger than that of the fourth valve sleeve through hole section The valve comprises a valve body blind hole, a valve sleeve, a valve body cover, a valve rod, a;
a balance valve core, which comprises a first balance valve core section which is fitted in the first valve sleeve through hole section in a left-right sliding manner, a second balance valve core section which is fitted in the second valve sleeve through hole section in a left-right sliding manner, a third balance valve core section which is fitted in the third valve sleeve through hole section in a left-right sliding manner, a fourth balance valve core section which is fitted in the fifth valve sleeve through hole section in a left-right sliding manner, and a connecting section which is positioned between the third balance valve core section and the fourth balance valve core section, wherein the diameter of the connecting section is smaller than that of the third balance valve core section, the balance valve core is provided with a valve core through hole which is communicated left and right, the valve core through hole comprises a first valve core through hole section, a second valve core through hole section, a third valve core through hole section and a fourth valve core through hole section from left to right, the aperture of the first valve core through hole section is larger than that of the second valve core through hole section, the aperture of the second valve core through hole section is larger than that of the third valve core through hole section, and the aperture of the fourth valve core through hole section is between that of the first valve core through hole section and that of the second valve core through hole section;
the first spring seat is arranged in the blind hole of the valve body, the section of the first spring seat is in a shape like the Chinese character 'ji', the left end surface of a vertical limb of the first spring seat abuts against the bottom surface of the blind hole of the valve body, the right end of a horizontal limb of the first spring seat extends rightwards into the left end of the through hole section of the first valve core, and the diameter of the horizontal limb of the first spring seat is smaller than that of the through hole section of the first valve core;
the first spring is sleeved on a horizontal limb of the first spring seat, the left end of the first spring is abutted against the right end face of a vertical limb of the first spring seat, the right end of the first spring is abutted against the left end face of the valve seat, the first spring is used for normally pushing the balance valve core to enable the right end face of the second balance valve core section to be abutted against the left step face of the third valve sleeve through hole section, at the moment, the left end face of the balance valve core is flush with the left end face of the valve sleeve, the right end face of the first balance valve core section and the left step face of the second valve sleeve through hole section are separated by a first preset distance to define a first control cavity, and the right end of the fourth balance valve core section extends into the sixth valve sleeve through hole section, the balance valve comprises a first balance valve core section, a second balance valve core section and a valve sleeve, wherein a peripheral wall of the first balance valve core section is provided with a second through-flow groove, a side wall of the first balance valve core section is provided with a first flow channel communicated with the first control cavity and the second through-flow groove, the valve sleeve is provided with a second flow channel communicated with the spring cavity and the second through-flow groove, a left side wall of the second through-flow groove is tangent to the left side of an opening of the second through-flow groove towards the second flow channel, the right end of the second balance valve core section is provided with a notch communicated with the first through-flow hole, the notch extends towards the left from the right end of the second balance valve core section, a second control cavity is limited between the notch and the valve sleeve, the balance valve core is provided with a second through-flow hole communicated with the peripheral surface of the connecting section and the second valve core through-hole section, and the balance valve core is provided with a third through-flow hole communicated with the fourth, a second preset distance is arranged between the left side wall of the notch and the right step surface of the through hole section of the first valve sleeve, and the second preset distance is equal to the width of the second through-flow groove in the left-right direction;
the one-way valve core comprises a head section and a sliding section positioned on the left side of the head section, the sliding section can be matched in the third valve core through hole section in a left-right sliding mode, the left side of the sliding section extends into the first valve core through hole section leftwards, and the diameter of the head section is larger than the aperture of the fourth valve core through hole section and is positioned on the right side of the fourth balanced valve core section;
the second spring seat is fixedly arranged at the left end of the sliding section;
the second spring is sleeved on the sliding section, the left end of the second spring abuts against the second spring seat, the right end of the second spring abuts against the left step face of the third valve core through hole section, the second spring normally pulls the one-way valve core leftwards to enable the end head section to normally close the right opening of the fourth valve core through hole section, at the moment, the left end face of the sliding section and the right end face of the horizontal limb of the first spring seat are separated by a third preset distance, and the third preset distance is smaller than the second preset distance.
2. The balanced valve of claim 1, further comprising a retainer ring fixedly secured over the left end of the sliding section to secure the second spring seat over the left end of the sliding section.
3. The balanced valve of claim 1, wherein the left end of the tip section is configured in a circular truncated cone shape with a diameter that increases from left to right in order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105309.1A CN109058216B (en) | 2018-09-21 | 2018-09-21 | Balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105309.1A CN109058216B (en) | 2018-09-21 | 2018-09-21 | Balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109058216A CN109058216A (en) | 2018-12-21 |
| CN109058216B true CN109058216B (en) | 2020-05-22 |
Family
ID=64762411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811105309.1A Active CN109058216B (en) | 2018-09-21 | 2018-09-21 | Balance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109058216B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB872226A (en) * | 1958-08-11 | 1961-07-05 | New York Air Brake Co | Flow rate compensated valve |
| SE442765B (en) * | 1982-02-18 | 1986-01-27 | Atlas Copco Ab | LAST pouring VALVE |
| JP2009281515A (en) * | 2008-05-22 | 2009-12-03 | Shimadzu Corp | Pilot check valve |
| CN201475070U (en) * | 2009-08-21 | 2010-05-19 | 宁波汉商液压有限公司 | Cartridge balance valve |
| CN202811596U (en) * | 2012-09-24 | 2013-03-20 | 温州美瑞克液压有限公司 | Hydraulic control device used for counterbalance valve |
-
2018
- 2018-09-21 CN CN201811105309.1A patent/CN109058216B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109058216A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022068046A1 (en) | Pilot-operated electric proportional high-pressure relief valve | |
| CN108843645A (en) | A kind of balanced valve | |
| CN105822618B (en) | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way valve | |
| CN110792650B (en) | Threaded cartridge type load retaining valve | |
| CN108825577B (en) | Balance valve with variable hydraulic control ratio | |
| CN107631064B (en) | It can be used for the ratio one-way flow valves of low-load | |
| CN110671379A (en) | Flow control type hoist balance valve | |
| CN108775431A (en) | Balanced valve | |
| CN109058216B (en) | Balance valve | |
| US7686039B2 (en) | Cartridge valve assembly | |
| CN110360174B (en) | Valve body, valve rod assembly, balance valve and hydraulic cylinder telescopic control loop of balance valve | |
| CN108953266B (en) | Balance valve opened in stages | |
| CN109751440B (en) | Flow balance valve | |
| CN110778555B (en) | Embedded pressure compensation valve rod | |
| CN108999824B (en) | Energy-saving balance valve | |
| CN108930681B (en) | Sectional control's balanced valve | |
| CN108999828B (en) | Balance valve | |
| CN109185498B (en) | Proportional balance valve | |
| CN109538563B (en) | Balance valve | |
| CN108953713B (en) | Flow type balance valve | |
| CN108869434B (en) | A kind of balanced valve | |
| CN110422778B (en) | Boom amplitude-changing hydraulic system and crane | |
| CN108953705B (en) | Pilot balance valve | |
| CN109058215B (en) | Plug-in type balance valve | |
| CN108661971B (en) | Load sensing type flow control balance 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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200417 Address after: 317609 valve industrial park, Longxi Town, Yuhuan City, Taizhou City, Zhejiang Province Applicant after: Zhejiang aoshike fluid control Co., Ltd Address before: 523000 Dongguan City, Guangdong Province, Songshan Lake High-tech Industrial Development Zone Headquarters, No. 2, No. 1 District, No. 2, No. 201 Applicant before: DONGGUAN HAITE PAWO HYDRAULIC TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |