CN107631064A - Ratio one-way flow valves available for low-load - Google Patents
Ratio one-way flow valves available for low-load Download PDFInfo
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- CN107631064A CN107631064A CN201711103469.8A CN201711103469A CN107631064A CN 107631064 A CN107631064 A CN 107631064A CN 201711103469 A CN201711103469 A CN 201711103469A CN 107631064 A CN107631064 A CN 107631064A
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Abstract
The present invention relates to a kind of ratio one-way flow valves available for low-load, it is characterised in that：Including valve body, valve pocket, valve pocket is provided with the first hydraulic fluid port, the second hydraulic fluid port and valve port；Main valve plug is provided with valve pocket, the periphery conical surface of main valve plug coordinates with valve port, has control chamber and installation cavity in main valve plug, the first damping hole is provided with the side wall of main valve plug, the inside of main valve plug is provided with the second damping hole, and the aperture of the first damping hole is less than the aperture of the second damping hole；Pilot valve is provided with control chamber, pilot valve can be moved up and down by proportion electro-magnet structure control, and the lower end of pilot valve coordinates with the second damping hole；Bushing and valve seat are installed in installation cavity, there is the first through flow hole, the second through flow hole and throttle orifice in bushing, be provided with throttling valve core in valve seat, the first spring is supported with below throttling valve core, when throttling valve core overcomes the first spring effect to move downward, throttling valve core will be gradually reduced the opening of throttle orifice.It is the ratio one-way flow valves available for low-load that a kind of structure is more reasonable, cost is low.
Description
Technical field
The invention belongs to the technical field of hydraulic valve, more particularly to a kind of ratio one-way flow valves available for low-load.
Background technology
In recent years, ratio one-way flow valves lift in truck-mounted crane, high-altitude operation vehicle, tractor rotary tillage plough, electri forklift etc.
Using more and more in equipment.When equipment stops, ratio one-way flow valves play a part of pressurize, prevent hydraulic cylinder from gliding；
When equipment needs to decline, ratio one-way flow valves control openings of sizes, adjust hydraulic cylinder according to the voltage signal size of input
The flow of output, and then control the decrease speed of jacking equipment.The ratio one-way flow valves that currently there are, there is following lack
Point：
1. the flow control of ratio one-way flow valves is that passing ratio electromagnet drives pilot valve, guide's oil return section is adjusted
Flow area, and then change the size of main valve plug control cavity pressure, effect of the main valve plug in load pressure and control cavity pressure pressure difference
Under follow pilot valve to open.Because the change of load causes the scope of main valve plug load cavity pressure change can in actual practicality
Can be 0.3~25MPa, such as load pressure may be 25MPA when electri forklift full-load run, and when empty, load pressure
Power is lower than 1MPa.Main valve plug is opened excessive during in order to prevent that load is too big, the throttling of the throttle orifice of general pilot valve control
Area is smaller, so when load pressure is 1~25MPa, is needed on main valve plug because power caused by pressure difference can reach main valve plug
Aperture is wanted, when load pressure is less than 1MPa, area of passage is adjusted by pilot valve, the pressure of main valve plug control chamber and load are pressed
The difference very little of power, so result in valve element aperture very little and do not open even, do not reach the flow of demand, influence ratio one-way flow
The application of valve.
In summary, existing ratio one-way flow valves can be further improved.
The content of the invention
The technical problems to be solved by the invention be for above-mentioned state of the art and provide a kind of structure it is more reasonable,
Cost is low, ratio one-way flow valves available for low-load.
Technical scheme is used by the present invention solves above-mentioned technical problem：A kind of ratio available for low-load unidirectionally flows
Measure valve, it is characterised in that：Including valve body, the lower end of valve body is threaded with the valve pocket with the shoulder hole axially penetrated through, valve pocket
Lower ending opening form the first hydraulic fluid port, be provided with the second hydraulic fluid port connected with shoulder hole, the small hole portion of shoulder hole in the side wall of valve pocket
Entrance point form the valve port for connecting first hydraulic fluid port and the second hydraulic fluid port；Stepped main valve plug, main valve are provided with valve pocket
The periphery conical surface of core coordinates with valve port, so that moving up and down for main valve plug can open and close valve port, the top in the main valve plug is formed
Control chamber, the bottom in main valve plug form the installation cavity communicated with the first hydraulic fluid port, it is oily that connection second are provided with the side wall of main valve plug
First damping hole of mouth and control chamber, the inside of main valve plug are provided with to connect the second damping hole of control chamber and installation cavity, and
The aperture of first damping hole is less than the aperture of the second damping hole；The pilot valve that can be moved up and down is provided with the control chamber, first
Guide valve core can be moved up and down by the proportion electro-magnet structure control installed in valve body upper end, the lower end of pilot valve and the second resistance
Buddhist nun hole coordinates, so that pilot valve moves up and down the opening degree that can control the second damping hole；It is provided with the installation cavity
Bushing and valve seat, valve seat are located at below bushing, and the lower end perforate of valve seat with the first hydraulic fluid port to communicate, in bushing periphery and installation cavity
Hole has the first through flow hole, the second through flow hole and throttle orifice radially axially penetrated through formed with annular channel, in bushing, the
Two through flow holes and throttle orifice are communicated with annular channel, and throttling valve core, the upper end convex shoulder of throttling valve core and first are provided with valve seat
It is upper and lower two chamber that through flow hole, which is slidably matched and separated, and the second through flow hole communicates with the epicoele of the first through flow hole, throttle orifice with
The cavity of resorption of first through flow hole communicates, and the lower end of throttling valve core is provided with the oil-through-hole of the first hydraulic fluid port of connection and the first through flow hole cavity of resorption,
The first spring is supported with below throttling valve core, first spring makes throttling valve core stay open the state of throttle orifice, works as throttling
When valve element overcomes the first acting force of the spring to move downward, throttling valve core will be gradually reduced the aperture of throttle orifice.
In one embodiment, the upper end of the throttling valve core from top to bottom includes with the first through flow hole mating part
Convex shoulder and the first cylinder, the diameter of convex shoulder are more than the diameter of the first cylinder, convex shoulder and the first cylinder can so formed enough
Big annulus flow area.
In one embodiment, aforementioned proportion electromagnet structure includes determining iron part, armature part, second spring and line
Enclose part, it is described determine iron part and plug and be weldingly fixed on the upper end in valve body, armature part it is interior located at valve body and can on move down
Dynamic, the upper end of the pilot valve is connected to the lower end of armature part and can moved up and down with armature part, the second spring
It is supported on and determines between iron part and armature part, the coiler part is set in and constrains in valve body top with can be to determining iron part
Form sensing.It is a kind of concrete structure of proportion electro-magnet structure above, can also uses existing other structures certainly.
Preferably, the lower end of above-mentioned armature part is provided with T-slot, the upper end of the pilot valve is provided with T-shaped connecting pole,
The T-shaped connecting pole, which is embedded in the T-slot, forms connection.The connected mode is easy to assembling between the two.
Preferably, the surface coordinated between the lower end of above-mentioned pilot valve and the second damping hole is the conical surface.
Compared with prior art, the advantage of the invention is that：This ratio one-way flow valves can meet that low-load uses.Specifically
, when the second hydraulic fluid port oil-feed, when the proportion electro-magnet structure is given certain voltage, proportion electro-magnet structure produces certain suction
Power, armature part overcome the power of second spring to produce certain upward displacement, drive pilot valve to be separated from the second damping hole, this
When control the pressure of intracavitary to decline, the pressure in the pressure and control chamber of the second hydraulic fluid port has pressure difference, and this differential pressure action is in main valve
On core (main valve plug is stepped shape, produces difference in areas), but now make a concerted effort also to be not enough to promote main valve plug to move up；Continue to increase ratio
Voltage on example electromagnet structure, the pressure difference increase in the pressure and control chamber of the second hydraulic fluid port, main valve plug are begun to move up, the
The fluid of two hydraulic fluid ports flows to the first hydraulic fluid port.Voltage to proportion electro-magnet structure continues to increase, the second damping hole and pilot valve
Between area of passage reach maximum, now main valve plug fully opens.If the pressure of the second hydraulic fluid port is bigger, the oil in control chamber
Liquid promotes throttling valve core to overcome the compression stress of the first spring to move downward, makes throttling valve core upper end convex after the second damping hole
Shoulder gradually covers in throttle orifice, reduces the area of passage of throttle orifice, the pressure in control chamber will not so reduced excessive, so as to
Make main valve plug opening excessive；And when the pressure ratio of the second hydraulic fluid port is relatively low, fluid is not enough to overcome the first bullet after the second damping hole
During the compression stress of spring, throttling valve core is in the position for opening throttle orifice completely, and area of passage is maximum, therefore the pressure of control chamber can
To obtain larger release, the pressure of the second hydraulic fluid port and the pressure difference of control chamber can be protected, and make main valve plug in the second hydraulic fluid port
Pressure it is relatively low when can also reach larger open.
Brief description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is the partial sectional view of the embodiment of the present invention；
Fig. 3 is enlarged drawing at Fig. 2 I；
Fig. 4 is the function schematic diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Figures 1 to 3, it is a preferred embodiment of the present invention.
A kind of ratio one-way flow valves available for low-load, including valve body 1, the lower end of valve body 1, which is threaded with, to be had
The valve pocket of the shoulder hole 21 axially penetrated through, the lower ending opening of valve pocket 2 form the first hydraulic fluid port A, are provided with the side wall of valve pocket 2 and ladder
Second hydraulic fluid port B of hole connection, the entrance point of the small hole portion of shoulder hole 21 form connection the first hydraulic fluid port A and the second hydraulic fluid port B valve port
22。
Stepped main valve plug 3 is provided with valve pocket 2, the periphery conical surface and the valve port 22 of main valve plug 3 coordinate, so that main valve plug
3 move up and down can open and close valve port 22, the top formation control chamber 31 in main valve plug 3, and the bottom in main valve plug 3 is formed and first
The installation cavity 32 that hydraulic fluid port A is communicated, the second hydraulic fluid port B of connection and the first damping hole 4a of control chamber 31 are provided with the side wall of main valve plug 3,
The inside of main valve plug 3 is provided with to connect the second damping hole 4b of control chamber 31 and installation cavity 32, and the first damping hole 4a hole
Footpath is less than the second damping hole 4b aperture.
The pilot valve 5 that can be moved up and down is provided with control chamber 31, pilot valve 5 is by the ratio installed in the upper end of valve body 1
Electromagnet structure 6 is controlled and can moved up and down, and the lower end of pilot valve 5 coordinates with the second damping hole 4b, so that pilot valve 5
The second damping hole 4b opening degree can be controlled by moving up and down, and be coordinated between the lower end of pilot valve 5 and the second damping hole 4b
Surface is the conical surface, and the lower end of pilot valve 5 can pass the second damping hole 4b downwards.
Proportion electro-magnet structure 6 includes determining iron part 61, armature part 62, second spring 63 and coiler part 64, described
Determine the upper end that iron part 61 plugs and is weldingly fixed in valve body 1, armature part 62 is in valve body 1 and can move up and down, first
The upper end of guide valve core 5 is connected to the lower end of armature part 62 and can moved up and down with armature part 62, and second spring 63 is supported on
Determine between iron part 61 and armature part 62, the coiler part 64 is set in and constrains in the top of valve body 1 with can be to determining iron portion
61 are divided to form sensing.The lower end of armature part 62 is provided with T-slot 621, and 5 upper ends of the pilot valve are provided with T-shaped connecting pole 51,
The T-shaped connecting pole 51, which is embedded in the T-slot 621, forms connection.
Bushing 7 and valve seat 8 be installed, valve seat 8 is located at the lower section of bushing 7, and the lower end perforate of valve seat 8 is with the in installation cavity 32
One hydraulic fluid port A is communicated, and for the periphery of bushing 7 with the endoporus of installation cavity 32 formed with annular channel 33, bushing 7 is interior to have first axially penetrated through
Through flow hole 71, the second through flow hole 72 and throttle orifice 73 radially, the second through flow hole 72 and throttle orifice 73 with annular channel 33
Communicate, be provided with throttling valve core 9 in valve seat 8, the through flow hole 71 of upper end convex shoulder 91 and first of throttling valve core 9 be slidably matched and by its every
Break and communicated for upper and lower two chamber, the second through flow hole 72 with the epicoele of the first through flow hole 71, under the through flow hole 71 of throttle orifice 73 and first
Chamber communicates, and the lower end of throttling valve core 9 is provided with the oil-through-hole 93 of the first hydraulic fluid port A of connection and the cavity of resorption of the first through flow hole 71, throttling valve core
91 lower section is supported with the first spring 10, and first spring 10 makes throttling valve core 9 stay open the state of throttle orifice 73, works as choke valve
When core 9 overcomes the active force of the first spring 10 to move downward, throttling valve core 9 will be gradually reduced the aperture of throttle orifice 73.
The operation principle and process of the present invention is as follows
If the second hydraulic fluid port B oil-feeds, when proportion electro-magnet structure 6 gives certain voltage, proportion electro-magnet structure 6 produces
Certain suction, armature part 62 overcome the power of second spring 63 to produce certain upward displacement, drive pilot valve 5 to be separated from
Second damping hole 4b, now the pressure in control chamber 31 will decline, the pressure in the second hydraulic fluid port B pressure and control chamber 31 has pressure
Difference, this differential pressure action (main valve plug 3 is stepped shape, produces difference in areas) on main valve plug 3, but now make a concerted effort also to be not enough to promote
Main valve plug 3 moves up；Continue to increase the voltage in proportion electro-magnet structure, the pressure difference in the second hydraulic fluid port B pressure and control chamber 31
Increase, main valve plug 3 are begun to move up, and the second hydraulic fluid port B fluid flows to the first hydraulic fluid port A.Voltage to proportion electro-magnet structure 6
Continue to increase, the area of passage between the second damping hole 4b and pilot valve 5 reaches maximum, and now main valve plug 3 fully opens.If
Second hydraulic fluid port B pressure is bigger, and the fluid in control chamber 31 promotes throttling valve core 9 to overcome the after the second damping hole 4b
The compression stress of one spring 10 moves downward, and the convex shoulder 91 of throttling valve core 9 is progressively covered in throttle orifice 73, reduces throttle orifice 73
Area of passage, epicoele of the fluid through the first through flow hole 71 flow into the second through flow hole 72, entered back into after annular channel 33 through throttle orifice
73 outflows, pressure in control chamber 31 will not so reduced excessive, cause to make main valve plug 3 be open excessive；And as the second hydraulic fluid port B
Pressure ratio it is relatively low, when fluid is not enough to overcome the compression stress of the first spring 10 after the second damping hole 4b, throttling valve core 9 is in
By 73 full opening of state of throttle orifice, the area of passage of throttle orifice 73 is maximum, thus the pressure of control chamber 31 can obtain compared with
Big release, the second hydraulic fluid port B pressure and the pressure difference of control chamber 31 can be protected, and make main valve plug 3 in the second hydraulic fluid port B pressure
Also larger open can be reached when power is relatively low.
Although the preferred embodiments of the present invention described in detail above, it is to be clearly understood that for this area
Technical staff for, the present invention can have various modifications and variations.That is made within the spirit and principles of the invention appoints
What modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (5)
- A kind of 1. ratio one-way flow valves available for low-load, it is characterised in that：Including valve body (1), the lower end spiral shell of valve body (1) Line is connected with the valve pocket with the shoulder hole (21) axially penetrated through, and the lower ending opening of valve pocket (2) forms the first hydraulic fluid port (A), valve pocket (2) the second hydraulic fluid port (B) connected with shoulder hole is provided with side wall, the entrance point of the small hole portion of shoulder hole (21) forms connection institute State the valve port (22) of the first hydraulic fluid port (A) and the second hydraulic fluid port (B)；Stepped main valve plug (3), main valve plug are provided with valve pocket (2) (3) the periphery conical surface coordinates with valve port (22), so that moving up and down for main valve plug (3) can open and close valve port (22), in main valve plug (3) Top form control chamber (31), the installation cavity (32) communicated with the first hydraulic fluid port (A), main valve are formed at the bottom in main valve plug (3) The second hydraulic fluid port of connection (B) and the first damping hole (4a) of control chamber (31), the inside of main valve plug (3) are provided with the side wall of core (3) Provided with to connect the second damping hole (4b) of control chamber (31) and installation cavity (32), and the aperture of the first damping hole (4a) is less than The aperture of second damping hole (4b)；The pilot valve (5) that can be moved up and down, pilot valve (5) are provided with the control chamber (31) Controlled by the proportion electro-magnet structure (6) installed in valve body (1) upper end and can be moved up and down, the lower end of pilot valve (5) and the Two damping holes (4b) coordinate, so that pilot valve (5) moves up and down the opening degree that can control the second damping hole (4b)；It is described Bushing (7) and valve seat (8) be installed in installation cavity (32), valve seat (8) is located at bushing (7) lower section, the lower end perforate of valve seat (8) with Communicated with the first hydraulic fluid port (A), with installation cavity (32) endoporus formed with annular channel (33), bushing (7) is interior to be had for bushing (7) periphery The first through flow hole (71), the second through flow hole (72) and throttle orifice (73) radially axially penetrated through, second through flow hole (72) communicated with throttle orifice (73) with annular channel (33), throttling valve core (9), throttling valve core (9) are provided with the valve seat (8) Upper end convex shoulder (91) and the first through flow hole (71) to be slidably matched and separated be upper and lower two chamber, second through flow hole (72) Communicated with the epicoele of the first through flow hole (71), the throttle orifice (73) communicates with the cavity of resorption of the first through flow hole (71), throttling valve core (9) lower end is provided with the oil-through-hole (93) of connection the first hydraulic fluid port (A) and the first through flow hole (71) cavity of resorption, under throttling valve core (91) Side is supported with the first spring (10), and first spring (10) makes throttling valve core (9) stay open the state of throttle orifice (73), works as section When flow valve core (9) overcomes the first spring (10) active force to move downward, the convex shoulder (91) will be gradually reduced throttle orifice (73) Aperture.
- 2. the ratio one-way flow valves according to claim 1 available for low-load, it is characterised in that：The throttling valve core (9) upper end from top to bottom includes convex shoulder (91) and the second cylinder (92), the convex shoulder with the first through flow hole (71) mating part (91) diameter is more than the diameter of the second cylinder (92).
- 3. the ratio one-way flow valves according to claim 1 available for low-load, it is characterised in that：The ratio electromagnetism Iron construction (6) includes determining iron part (61), armature part (62), second spring (63) and coiler part (64), described to determine iron portion The upper end for dividing (61) to plug and be weldingly fixed in valve body (1), armature part (62) are in valve body (1) and can move up and down, The upper end of the pilot valve (5) is connected to the lower end of armature part (62) and can moved up and down with armature part (62), described Second spring (63), which is supported on, determines between iron part (61) and armature part (62), and the coiler part (64) is set in and constrained Valve body (1) top with can to determine iron part (61) formed sensing.
- 4. the ratio one-way flow valves according to claim 3 available for low-load, it is characterised in that：The armature part (62) lower end is provided with T-slot (621), and (5) upper end of the pilot valve is provided with T-shaped connecting pole (51), the T-shaped connecting pole (51) connection is formed in the embedded T-slot (621).
- 5. the ratio one-way flow valves according to claim 4 available for low-load, it is characterised in that：The pilot valve (5) surface coordinated between lower end and the second damping hole (4b) is the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103469.8A CN107631064B (en) | 2017-11-10 | 2017-11-10 | It can be used for the ratio one-way flow valves of low-load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711103469.8A CN107631064B (en) | 2017-11-10 | 2017-11-10 | It can be used for the ratio one-way flow valves of low-load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107631064A true CN107631064A (en) | 2018-01-26 |
| CN107631064B CN107631064B (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711103469.8A Active CN107631064B (en) | 2017-11-10 | 2017-11-10 | It can be used for the ratio one-way flow valves of low-load |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709007A (en) * | 2018-06-12 | 2018-10-26 | 东莞海特帕沃液压科技有限公司 | A kind of electromagnet cut off valve |
| CN109139591A (en) * | 2018-09-25 | 2019-01-04 | 中国农业大学 | A kind of adaptive pilot-operated type electric-hydraulic proportion screw-in cartridge valve of mountain and hill |
| CN112855639A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Load holding valve, load holding valve group and method for assembling load holding valve |
| WO2022001032A1 (en) * | 2020-06-30 | 2022-01-06 | 潍柴动力股份有限公司 | Load holding valve and hydraulic control system |
| CN115891789A (en) * | 2021-09-30 | 2023-04-04 | 比亚迪股份有限公司 | Damping adjusting valve, damper and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108709007A (en) * | 2018-06-12 | 2018-10-26 | 东莞海特帕沃液压科技有限公司 | A kind of electromagnet cut off valve |
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| CN109139591A (en) * | 2018-09-25 | 2019-01-04 | 中国农业大学 | A kind of adaptive pilot-operated type electric-hydraulic proportion screw-in cartridge valve of mountain and hill |
| CN109139591B (en) * | 2018-09-25 | 2020-03-10 | 中国农业大学 | Mountain and hill self-adaptation pilot-operated type electro-hydraulic proportional threaded cartridge valve |
| CN112855639A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Load holding valve, load holding valve group and method for assembling load holding valve |
| CN112855639B (en) * | 2019-11-27 | 2023-06-06 | 哈威液压股份公司 | Load holding valve, load holding valve block and method for assembling a load holding valve |
| WO2022001032A1 (en) * | 2020-06-30 | 2022-01-06 | 潍柴动力股份有限公司 | Load holding valve and hydraulic control system |
| EP4174349A4 (en) * | 2020-06-30 | 2024-04-03 | Weichai Power Co., Ltd. | Load holding valve and hydraulic control system |
| CN115891789A (en) * | 2021-09-30 | 2023-04-04 | 比亚迪股份有限公司 | Damping adjusting valve, damper and vehicle |
| CN115891789B (en) * | 2021-09-30 | 2024-09-10 | 比亚迪股份有限公司 | Damping regulating valve, damper and vehicle |
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| Publication number | Publication date |
|---|---|
| CN107631064B (en) | 2019-04-26 |
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