CN108999824B - Energy-saving balance valve - Google Patents
Energy-saving balance valve Download PDFInfo
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- CN108999824B CN108999824B CN201811105323.1A CN201811105323A CN108999824B CN 108999824 B CN108999824 B CN 108999824B CN 201811105323 A CN201811105323 A CN 201811105323A CN 108999824 B CN108999824 B CN 108999824B
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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
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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
- F15B13/029—Counterbalance valves
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- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides an energy-saving balance valve, which comprises: the valve comprises a valve sleeve, an end plug, a balance valve core, a plunger, a first spring, a retainer ring, a spring seat, a one-way valve core and a second spring. The energy-saving balance valve provided by the embodiment of the invention is simple to process, can realize stability control under high load, can reduce the control pressure for fully opening the balance valve core under low load or no load, and has a great energy-saving effect.
Description
Technical Field
The invention relates to a valve component for a hydraulic device, in particular to an energy-saving balance 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 the advantages that the balance valve core generates the same displacement, the pressure of the balance valve control port with the low hydraulic control ratio needs to be increased to be larger than that of the balance valve with the high hydraulic control ratio, and therefore under the condition that the pressure fluctuation amplitudes of the control ports are the same, 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, and therefore 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 an energy-saving balance valve which is simple to machine, can meet the requirement of stable control when fully loaded and can reduce the control pressure when fully opened under no-load.
According to the embodiment of the invention, the energy-saving balance valve comprises:
the valve barrel, the valve barrel has the valve barrel through-hole that link up from top to bottom, valve barrel through-hole top-down includes first valve barrel through-hole section, second valve barrel through-hole section, third valve barrel through-hole section and fourth valve barrel through-hole section, the aperture of first valve barrel through-hole section is greater than the aperture of fourth valve barrel through-hole section, the aperture of fourth valve barrel through-hole section is greater than the aperture of second valve barrel through-hole section, the aperture of second valve barrel through-hole section is greater than the aperture of third valve barrel through-hole section, it all is located to have outer opening on the valve barrel first runner, orifice and through-hole on the periphery wall of valve barrel, the interior opening of first runner is located just be close to on the internal perisporium of second valve barrel through-hole section the last step face of third valve barrel through-hole section, the interior opening of orifice is located on the internal perisporium of third valve barrel through-hole section, the interior opening of through-hole is located on the internal perisporium of fourth valve barrel through-hole section and adjacent to the internal perisporium of The valve sleeve comprises a first flow passage, a second flow passage, a first valve sleeve through hole section and a valve sleeve through hole section, wherein the outer opening of the first flow passage forms a first oil port, the outer opening of the throttling hole and the outer opening of the through hole form a second oil port, the middle part of the second valve sleeve through hole section is provided with an annular first through flow groove, and a communication hole for communicating the first through flow groove and the bottom surface of the first valve sleeve through hole section is formed in the valve sleeve;
the end plug is arranged on the valve sleeve and used for sealing an upper opening of the through hole of the valve sleeve;
a balance valve core, which comprises a first balance valve core section matched with the first valve sleeve through hole section, a second balance valve core section matched with the second valve sleeve through hole section and a third balance valve core section matched with the third valve sleeve through hole section from top to bottom, wherein the first balance valve core section is matched in the first valve sleeve through hole in a vertically sliding manner, the second balance valve core section is matched in the second valve sleeve through hole in a vertically sliding manner, the third balance valve core section is matched in the third valve sleeve through hole section in a vertically sliding manner, the balance valve core is provided with a balance valve core through hole which is communicated vertically, the balance valve core through hole comprises an upper through hole section positioned on the first balance valve core section and the second balance valve core section and a lower through hole section positioned on the third balance valve core section, and the aperture of the upper through hole section is smaller than that of the third valve sleeve through hole section, the aperture of the lower through hole section is smaller than that of the upper through hole section, a first control cavity matched with the inner opening of the first flow channel is formed on the outer peripheral wall of the second balanced valve core section, a second control cavity is defined between the lower end face of the first balanced valve core section and the upper step face of the second valve sleeve through hole section in the first valve sleeve through hole section, the communication hole is communicated with the second control cavity, and a control hole for communicating the second control cavity with the upper through hole section is formed in the side wall of the second balanced valve core section;
the plunger is fixedly connected with the end plug, the lower end of the plunger extends downwards into the valve sleeve through hole and is inserted into the upper through hole section so that the balance valve core can slide up and down relative to the plunger, a blocking shoulder is arranged in the middle of the plunger, a second flow channel is arranged in the plunger, and an annular second flow through groove and a flow through hole for communicating the second flow through groove with the second flow channel are formed in the side wall of the lower end of the plunger;
the first spring is sleeved on the plunger, the upper end of the first spring abuts against the lower end face of the plunger retaining shoulder, the lower end of the first spring abuts against the upper end face of the first balanced valve core section, the first spring normally pushes the balanced valve core downwards to enable the lower end face of the second balanced valve core section to abut against the upper step face of the third valve sleeve through hole section, at the moment, the lower end of the third balanced valve core section extends downwards into the fourth valve sleeve through hole section, the control hole is communicated with the second through flow groove, the first control cavity is not communicated with the first through flow groove, a third control cavity is defined between the outer peripheral wall of the plunger and the upper end face of the first balanced valve core section in the first valve sleeve through hole section, the second flow channel is communicated with the third control cavity, and a third flow channel is arranged on the side wall of the valve sleeve, the outer opening of the third flow channel is positioned on the peripheral wall of the valve sleeve, the inner opening of the third flow channel is communicated with the third control cavity, and the outer opening of the third flow channel forms a third oil port;
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 larger than that of the upper through hole section, and a fourth 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;
when the balance valve core moves upwards from the lowest end position, the second control cavity is communicated with the second through-flow groove through the control hole and the first through-flow groove is isolated from the first control cavity, and when the balance valve core moves upwards to a certain distance, the control hole is isolated from the second through-flow groove and the first control cavity is communicated with the first through-flow groove.
Advantageously, the balance valve further comprises a retainer ring embedded on an inner wall of the through hole section of the fourth valve housing 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.
Advantageously, the plunger upper end protrudes upwards beyond the upper end face of the end plug and is locked by a nut.
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 an energy efficient balancing valve according to one embodiment of the present invention;
FIG. 2 is a hydraulic schematic of an economized trim valve according to one embodiment of the present disclosure;
fig. 3 is a hydraulic schematic diagram of an application scenario of an energy efficient trim valve according to an 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.
An energy saving type balancing valve according to an embodiment of the present invention will be described in detail 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 sleeve 1, an end plug 2, a balance valve core 3, a plunger 4, a nut 5, a first spring 6, a spring seat 8, a one-way valve core 9 and a second spring 10.
The valve sleeve 1 is provided with a valve sleeve through hole which is communicated up and down, and 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 throttle hole 102 and a through-flow hole 103, all of which have outer openings on the outer peripheral wall thereof. The inner opening of the first flow channel 101 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 throttle hole 102 is located on the inner peripheral wall of the third valve sleeve through hole section, and the inner opening of the through hole 103 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 constitutes a first port X, and the outer opening of the orifice 102 and the outer opening of the through-flow hole 103 constitute a second port V. An annular first flow through groove 106 is formed in the middle of the through hole section of the second valve sleeve, and a communication hole 105 for communicating the first flow through groove 106 with the bottom surface of the through hole section of the first valve sleeve is formed in the valve sleeve 1. Advantageously, the orifice hole 102 is arranged in a plurality of turns in the axial direction of said third sleeve through hole section, each turn having a plurality of orifices 102 arranged at regular intervals in the circumferential direction of said third sleeve through hole section.
The end plug 2 is arranged on the valve sleeve 1 and used for sealing the upper opening of the through hole of the valve sleeve. Advantageously, an end plug 2 is screwed to the upper end of the through bore of the valve housing.
The balance valve core 3 comprises a first balance valve core section matched with the first valve sleeve through hole section, a second balance valve core section matched with the second valve sleeve through hole section and a third balance valve core section matched with the third valve sleeve through hole section from top to bottom. The first balanced spool section is slidably fitted in the first sleeve through hole up and down (sliding up and down means that the two parts are in contact, the same applies hereinafter), the second balanced spool section is slidably fitted in the second sleeve through hole up and down, and the third balanced spool section is slidably fitted in the third sleeve through hole section up and down. The balanced valve core is provided with a balanced valve core through hole 301 which is through up and down, the balanced valve core through hole 301 comprises an upper through hole section positioned on the first balanced valve core section and the second balanced valve core section and a lower through hole section positioned on the third balanced valve core section, the aperture of the upper through hole section is smaller than that of the third valve sleeve through hole section, and the aperture of the lower through hole section is smaller than that of the upper through hole section. A first control chamber 1a adapted to the inner opening of the first flow passage 101 is formed in the outer peripheral wall of the second balanced spool piece. In the first valve sleeve through hole section, a second control cavity 1b is defined between the lower end surface of the first balance valve core section and the upper step surface of the second valve sleeve through hole section, the communication hole 105 is communicated with the second control cavity 1b, and a control hole 302 for communicating the second control cavity 1b and the upper through hole section is arranged on the side wall of the second balance valve core section.
The plunger 4 is fixedly connected with the end plug 2, the lower end of the plunger 2 extends downwards into the valve sleeve through hole and is inserted into the upper through hole section so that the balance valve core 3 can slide up and down relative to the plunger 2, and a blocking shoulder 41 is arranged in the middle of the plunger. A second flow passage 401 is arranged in the plunger 4, and an annular second flow passage 403 and an overflowing hole 402 for communicating the second flow passage 403 with the second flow passage are arranged on the side wall of the lower end of the plunger 4.
The first spring 6 is sleeved on the plunger 4, the upper end of the first spring 6 abuts against the lower end face of the retaining shoulder 41, and the lower end of the first spring 6 abuts against the upper end face of the first balanced valve core section. The first spring 6 normally pushes the balanced valve core 3 downwards to enable the lower end face of the second balanced valve core section to abut against the upper step face of the third valve sleeve through hole section. At this time, the lower end of the third balanced valve core section extends downwards into the fourth valve sleeve through hole section, the control hole 302 is communicated with the second through flow groove 403, the first control cavity 1a is isolated from the first through flow groove 106, in the first valve sleeve through hole section, a third control cavity 1c is defined between the outer peripheral wall of the plunger 4 and the upper end surface of the first balanced valve core section, the second flow channel 401 is communicated with the third control cavity 1c, the side wall of the valve sleeve 1 is provided with a third flow channel 104, the outer opening of the third flow channel 104 is located on the outer peripheral wall of the valve sleeve 1, the inner opening of the third flow channel 104 is communicated with the third control cavity 1c, and the outer opening of the third flow channel 104 forms a third oil port T.
And the spring seat 8 is fixedly arranged in the through hole section of the fourth valve sleeve. Advantageously, the balancing valve further comprises a retainer ring 11, and the retainer ring 11 is embedded on the inner wall of the through hole section of the fourth valve housing to fix the spring seat 8.
The check valve spool 9 includes a main body section which is slidably fitted in the fourth valve housing through-hole section up and down and a reduced diameter section which is located below the main body section and slidably fitted in the spring seat up and down. The check valve core 9 is provided with a check valve core through hole 901 which is through up and down, the aperture of the check valve core through hole 901 is smaller than that of the third valve sleeve through hole section and larger than that of the upper through hole section, and the lower end of the check valve core through hole 901 forms a fourth oil port C.
The second spring 10 is sleeved on the reducing section, the upper end of the second spring 10 abuts against the lower end face of the main body section, the lower end of the second spring 10 abuts against the spring seat 8, and the second spring 10 normally pushes the check valve spool 9 upwards to enable the upper end face of the check valve spool 9 to abut against the lower end face of the third balanced valve spool section so as to close the through flow hole 103.
When the balanced valve core 3 moves upward from the lowest end position, the second control chamber 1b is firstly communicated with the second through-flow groove 403 through the control hole 302 and the first through-flow groove 106 is blocked from communicating with the first control chamber 1a, and when the balanced valve core 3 moves upward to a certain distance, the control hole 302 is blocked from communicating with the second through-flow groove 403 and the first control chamber 1a is communicated with the first through-flow groove 106.
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 second port V is connected to one working port a of the directional control valve 12, the first port X and the rod chamber of the hydraulic cylinder 13 are both connected to the other working port B of the directional control valve 12, the fourth port C is connected to the rodless chamber of the hydraulic cylinder 13, and the third port T is connected to the oil tank 14.
(1) In the ascending process, the pressure oil of the reversing valve 12 reaches the second port V of the balance valve, the pressure oil of the second port V pushes the check valve core 9 to move downwards through the through hole 103 to overcome the acting force of the second spring 10 to open the valve port, and the oil flows into the fourth port C through the second port V to reach the rodless cavity of the hydraulic cylinder 13 to push the hydraulic cylinder 13 to move upwards.
(2) In the descending process, the reversing valve 12 reverses, the pressure oil of the first oil port X enters the first control cavity 1a and acts on the balance valve core 3, the balance valve core 3 is controlled to move upwards in two stages according to the pressure of the first oil port X, 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. The specific process is as follows:
the first stage is as follows: pressure oil of the first oil port X enters the first control chamber 1a through the first flow passage 101 and acts on the balanced valve core 3, at this time, the area of the pressure of the first oil port X acting on the balanced valve core 3 is an annular area formed by the second balanced valve core section and the third balanced valve core section, and meanwhile, the oil of the second control chamber 1b flows into the third oil port T after passing through the control hole 302, the second flow passage 403, the flow passing hole 402, the second flow passage 401 and the third control chamber 1c in sequence. In other words, in the first stage, the pressure in the first control chamber 1a is equal to the pressure in the first port X, and the pressure in the second control chamber 1b is equal to the pressure in the third port T (no pressure). Therefore, in the first stage, the hydraulic control ratio of the present invention can be designed to be a low hydraulic control ratio, the balance valve spool 3 moves upward against the acting force of the first spring 6 under the action of the pressure in the first control chamber 1a, the conical surface sealing surface is opened first, and simultaneously, the check valve spool 9 moves upward to abut against the lower step surface of the third sleeve through-hole section to block the through-hole 103 and the fourth port C, the pressure of the first port X increases, the balance valve spool 3 further moves upward, and each orifice 102 previously covered by the third balance valve spool section is gradually exposed, so that the flow area is gradually increased, and the load lowering speed can be accurately controlled.
And a second stage: the pressure of the first port X continues to increase, the balanced valve element 3 continues to move upward, and the second stage is performed when the control hole 302 is blocked from the through-flow groove 403 and the first control chamber 1a is simultaneously communicated with the first through-flow groove 106. In the second stage, since the control hole 302 is disconnected from the second flow through groove 403 and is communicated with the first control chamber 1a through the first flow through groove 106, that is, the pressures in the first control chamber 1a and the second control chamber 1b are equal to the pressure of the first port X, the area of the pressure of the first port X acting on the balanced valve spool 3 is the annular area formed by the first balanced valve spool section and the third balanced valve spool section. Thus, in the second stage, since the acting area on the balanced valve core 3 is increased compared to the first stage, that is, the pilot ratio of the present invention is improved, the first port X increases the same pressure, and the balanced valve core 3 is displaced more than in the first stage.
(3) And in the stopping process, the pressure of the first oil port X is reduced, the first spring 6 pushes the balance valve core 3 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 pressure hydraulic oil of the fourth port C acts on the annular acting area (S1-S2) of the balance valve spool 3, and if the impact pressure exceeds the acting force of the first spring 6, the balance valve spool 3 quickly opens the throttle hole 102 to buffer the pressure impact.
Through the above description, it can be seen that the beneficial effects of the present invention are:
(1) in the process of moving the balance valve core 3 away and opening, the on-off relationship between the control hole 302 and the second through flow groove 403 can be changed according to the moving distance, and the on-off relationship between the first control cavity 1a and the first through flow groove 106 can be changed simultaneously, so that the second control cavity 1b is controlled to be communicated with the first oil port X or the third oil port T, the acting area of the pressure of the first oil port X on the balance valve core 3 is changed, the conversion from the low hydraulic control ratio in the initial motion to the high hydraulic control ratio in the later motion period of the balance valve core 3 is realized, the stability of the motion under the high load can be guaranteed, the pressure of the first oil port X in the full-open state of the balance valve core 3 under the low load or no load can be greatly reduced, and the energy-saving effect is greatly achieved.
(2) The throttle holes 102 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 throttle holes 102 which are evenly arranged along the circumferential direction of the third sleeve through hole section at intervals, when the balance valve core 3 moves upwards to open the valve port, the throttle holes 102 can be opened in sequence, and through reasonable aperture size and axial interval configuration, the change of flow area can be accurately controlled, so that the flow can be accurately controlled.
(3) When the load rises, the through hole 102, the one-way valve core 9 and the valve port between the balance valve cores 3 pass through; when the load is reduced, the balance valve core 3 and the throttling hole 102 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 (4)
1. An energy efficient counterbalance 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 throttling hole and a through hole, the outer opening of the first flow channel is positioned on the outer peripheral wall of the valve sleeve, the inner opening of the first 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, the inner opening of the throttling hole is positioned on the inner peripheral wall of the third valve sleeve through hole section, and a plurality of rings are arranged along the axial direction of the, each ring is provided with a plurality of throttle holes which are uniformly arranged at intervals along the circumferential direction of the through hole section of the third valve sleeve, the inner openings of the through holes are positioned on the inner circumferential wall of the through hole section of the fourth valve sleeve and are 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 forms a first oil port, the outer opening of the throttle hole and the outer opening of the through hole form a second oil port, the middle part of the through hole section of the second valve sleeve is provided with an annular first through hole, and the inside of the valve sleeve is provided with a communication hole for communicating the first through hole and the bottom surface of the through hole section of the first valve sleeve;
the end plug is arranged on the valve sleeve and used for sealing an upper opening of the through hole of the valve sleeve;
a balance valve core, which comprises a first balance valve core section matched with the first valve sleeve through hole section, a second balance valve core section matched with the second valve sleeve through hole section and a third balance valve core section matched with the third valve sleeve through hole section from top to bottom, wherein the first balance valve core section is matched in the first valve sleeve through hole in a vertically sliding manner, the second balance valve core section is matched in the second valve sleeve through hole in a vertically sliding manner, the third balance valve core section is matched in the third valve sleeve through hole section in a vertically sliding manner, the balance valve core is provided with a balance valve core through hole which is communicated vertically, the balance valve core through hole comprises an upper through hole section positioned on the first balance valve core section and the second balance valve core section and a lower through hole section positioned on the third balance valve core section, and the aperture of the upper through hole section is smaller than that of the third valve sleeve through hole section, the aperture of the lower through hole section is smaller than that of the upper through hole section, a first control cavity matched with the inner opening of the first flow channel is formed on the outer peripheral wall of the second balanced valve core section, a second control cavity is defined between the lower end face of the first balanced valve core section and the upper step face of the second valve sleeve through hole section in the first valve sleeve through hole section, the communication hole is communicated with the second control cavity, and a control hole for communicating the second control cavity with the upper through hole section is formed in the side wall of the second balanced valve core section;
the plunger is fixedly connected with the end plug, the lower end of the plunger extends downwards into the valve sleeve through hole and is inserted into the upper through hole section so that the balance valve core can slide up and down relative to the plunger, a blocking shoulder is arranged in the middle of the plunger, a second flow channel is arranged in the plunger, and an annular second flow through groove and a flow through hole for communicating the second flow through groove with the second flow channel are formed in the side wall of the lower end of the plunger;
the first spring is sleeved on the plunger, the upper end of the first spring abuts against the lower end face of the plunger retaining shoulder, the lower end of the first spring abuts against the upper end face of the first balanced valve core section, the first spring normally pushes the balanced valve core downwards to enable the lower end face of the second balanced valve core section to abut against the upper step face of the third valve sleeve through hole section, at the moment, the lower end of the third balanced valve core section extends downwards into the fourth valve sleeve through hole section, the control hole is communicated with the second through flow groove, the first control cavity is not communicated with the first through flow groove, a third control cavity is defined between the outer peripheral wall of the plunger and the upper end face of the first balanced valve core section in the first valve sleeve through hole section, the second flow channel is communicated with the third control cavity, and a third flow channel is arranged on the side wall of the valve sleeve, the outer opening of the third flow channel is positioned on the peripheral wall of the valve sleeve, the inner opening of the third flow channel is communicated with the third control cavity, and the outer opening of the third flow channel forms a third oil port;
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 larger than that of the upper through hole section, and a fourth 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;
when the balance valve core moves upwards from the lowest end position, the second control cavity is communicated with the second through-flow groove through the control hole and the first through-flow groove is isolated from the first control cavity, and when the balance valve core moves upwards to a certain distance, the control hole is isolated from the second through-flow groove and the first control cavity is communicated with the first through-flow groove.
2. The economizer balance valve of claim 1 further comprising a retainer ring embedded in an inner wall of the fourth valve housing through bore section to retain the spring seat.
3. The economizer balance valve of claim 1 or 2 wherein the end plug is threadedly connected to the upper end of the valve housing through bore.
4. The energy saving type balance valve of claim 1 or 2, wherein the plunger upper end is protruded upward from the upper end face of the end plug and locked by a nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105323.1A CN108999824B (en) | 2018-09-21 | 2018-09-21 | Energy-saving balance valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105323.1A CN108999824B (en) | 2018-09-21 | 2018-09-21 | Energy-saving balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999824A CN108999824A (en) | 2018-12-14 |
| CN108999824B true CN108999824B (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811105323.1A Active CN108999824B (en) | 2018-09-21 | 2018-09-21 | Energy-saving balance valve |
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Citations (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 |
| DE3305282A1 (en) * | 1982-02-18 | 1983-08-25 | Atlas Copco AB, Nacka | Load-holding valve or overcentre valve for hydraulic systems |
| JP2009281515A (en) * | 2008-05-22 | 2009-12-03 | Shimadzu Corp | Pilot check valve |
| CN101634317A (en) * | 2009-08-21 | 2010-01-27 | 宁波汉商液压有限公司 | Plug-in type balance valve |
| CN106050780A (en) * | 2016-07-19 | 2016-10-26 | 宁波文泽机电技术开发有限公司 | Flow type balance valve |
-
2018
- 2018-09-21 CN CN201811105323.1A patent/CN108999824B/en active Active
Patent Citations (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 |
| DE3305282A1 (en) * | 1982-02-18 | 1983-08-25 | Atlas Copco AB, Nacka | Load-holding valve or overcentre valve for hydraulic systems |
| JP2009281515A (en) * | 2008-05-22 | 2009-12-03 | Shimadzu Corp | Pilot check valve |
| CN101634317A (en) * | 2009-08-21 | 2010-01-27 | 宁波汉商液压有限公司 | Plug-in type balance valve |
| CN106050780A (en) * | 2016-07-19 | 2016-10-26 | 宁波文泽机电技术开发有限公司 | Flow type balance valve |
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| Publication number | Publication date |
|---|---|
| CN108999824A (en) | 2018-12-14 |
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Effective date of registration: 20200323 Address after: 317609 Yuhuan City, Zhejiang Province, Longxi Town Industrial District, Yuhuan City Applicant after: Yuhuan XINDELI Valve 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. |
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