CN108506266B - Plug-in type proportional valve - Google Patents
Plug-in type proportional valve Download PDFInfo
- Publication number
- CN108506266B CN108506266B CN201810736146.0A CN201810736146A CN108506266B CN 108506266 B CN108506266 B CN 108506266B CN 201810736146 A CN201810736146 A CN 201810736146A CN 108506266 B CN108506266 B CN 108506266B
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- hole
- valve
- oil port
- plug
- flow
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a plug-in type proportional valve, which comprises a plug-in valve body, wherein a valve hole penetrating left and right is formed in the plug-in valve body, and a valve core is connected in the valve hole in a sliding manner; a threaded sleeve is installed at the left end of the plug-in valve body, a left-right through installation hole is formed in the threaded sleeve, and a transmission rod in threaded connection with the left end of the valve core is connected in the installation hole in a sliding mode; the left end of the valve hole is provided with a plug which is sleeved on the transmission rod in a clearance way, and a return spring is arranged between the plug and the left end of the transmission rod in the mounting hole; a fourth annular groove is formed in the outer side face of the threaded sleeve, an X hydraulic control oil port communicated with the mounting hole is formed in the fourth annular groove, and a Y hydraulic control oil port is formed in the right end of the valve hole; a third through hole is formed in the valve core along the axial direction of the valve core, and the right end of the third through hole is communicated with the Y hydraulic control oil port; the cartridge valve has the advantages of simple and reasonable structure, low manufacturing cost, convenient integrated design and capability of simplifying a hydraulic oil circuit.
Description
Technical Field
The invention relates to the technical field of cartridge valves, in particular to a cartridge proportional valve.
Background
At present, a plurality of directional control valves are widely applied to hydraulic systems of vehicles, engineering machinery, agricultural machinery, mining machinery, forestry machinery and petroleum machinery equipment for controlling the movement direction and speed of an actuating element. The multi-way reversing valve is generally in a three-position six-way form, is mostly in a casting form, or is a sheet type multi-way reversing valve or an integral type multi-way reversing valve, each joint reversing valve is in an eight-groove structure, and a partial flow passage is very complicated, so that the integral structure is large in size, heavy in weight and high in cost; and along with the complexity of the hydraulic oil circuit, the existing multi-way reversing valve is not suitable for integrated design, and in order to meet the complex hydraulic oil circuit, the multi-way reversing valve is connected with other functional valve blocks through a plurality of hoses, so that the pipeline of a main machine is complex and oil leakage is easily caused.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects in the prior art and provides the cartridge type proportional valve which is simple and reasonable in structure, low in manufacturing cost, convenient to integrate and design and capable of simplifying a hydraulic oil way.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a plug-in type proportional valve is characterized by comprising a plug-in valve body, wherein a valve hole penetrating left and right is formed in the plug-in valve body, and a valve core is connected in the valve hole in a sliding manner; a first annular groove, a second annular groove and a third annular groove are sequentially arranged on the outer side surface of the plug-in valve body from left to right, a B oil port and a first through hole which are communicated with the valve hole are formed in the first annular groove, a P oil port which is communicated with the valve hole is formed in the second annular groove, and an A oil port and a second through hole which are communicated with the valve hole are formed in the third annular groove; the left end of the plug-in valve body is provided with a threaded sleeve, the threaded sleeve is internally provided with a mounting hole of which the right end is communicated with the valve hole, and a transmission rod in threaded connection with the left end of the valve core is connected in the mounting hole in a sliding manner; the left end of the valve hole is provided with a plug which is sleeved on the transmission rod in a clearance mode, the outer side of the transmission rod in the mounting hole is sleeved with a return spring, a first spring seat which is sleeved on the transmission rod is arranged between the right end of the return spring and the plug, and the right end of the first spring seat penetrates through the plug and extends into the valve hole to be used for compressing the return spring through the first spring seat when the valve core moves leftwards; a second spring seat sleeved on the transmission rod is arranged between the left end of the reset spring and the plug, and a convex shoulder is arranged at the left end of the transmission rod and used for compressing the reset spring through the second spring seat when the valve core drives the transmission rod to move rightwards; a fourth annular groove is formed in the outer side face of the threaded sleeve, an X hydraulic control oil port communicated with the mounting hole is formed in the fourth annular groove, and a Y hydraulic control oil port is formed in the right end of the valve hole;
a third through hole is formed in the valve core along the axial direction of the valve core, the right end of the third through hole is communicated with the Y hydraulic control oil port, a first convex shoulder and a second convex shoulder are sequentially arranged on the side surface of the valve core from left to right, and a left control cavity is formed between the first convex shoulder and the plug; be equipped with first annular through-flow groove on the lateral surface of first convex shoulder, be equipped with second annular through-flow groove on the lateral surface of second convex shoulder, be equipped with the fifth through-flow hole that is used for communicateing first annular through-flow groove and third through-flow hole in the case to and be used for communicateing the sixth through-flow hole of second annular through-flow groove and third through-flow hole.
Through the technical scheme, when the cartridge valve works, the X hydraulic control oil port and the Y hydraulic control oil port are communicated with the oil tank, the valve core is in the middle position at the moment, and oil liquid of the oil port A and the oil liquid of the oil port B are communicated with the Y hydraulic control oil port for unloading; when the X hydraulic control oil port returns oil and the Y hydraulic control oil port is filled with pressure oil, the valve core moves leftwards from the middle position under the pressure action of the Y hydraulic control oil port and overcomes the acting force of a return spring, the first annular through-flow groove is gradually disconnected with the first through-flow hole, and the second annular through-flow groove is gradually disconnected with the second through-flow hole, so that the valve core disconnects the communication of the oil port A, the oil port B and the third through-flow hole and stops unloading; meanwhile, the valve core gradually opens the oil port B, the opening degree of the oil port B is in direct proportion to the control pressure of the hydraulic control oil port Y, and therefore the opening size of the oil port B can be controlled through the hydraulic control proportion, and the flow of the oil port B is controlled; when the Y hydraulic control oil port returns oil and the X hydraulic control oil port is filled with pressure oil, the pressure oil sequentially enters the left control cavity through the mounting hole and a gap between the plug and the transmission rod to push the valve core to move rightwards from the middle position, the reset spring starts to compress under the action of the transmission rod, the first annular through flow groove is gradually disconnected from the first through flow hole, the second annular through flow groove is gradually disconnected from the second through flow hole, and therefore the valve core is disconnected from the communication of the oil ports A and B and the third through flow hole and stops unloading; meanwhile, the valve core gradually opens the oil port A, the opening degree of the oil port A is in direct proportion to the control pressure of the X hydraulic control oil port, and therefore the opening size of the oil port A can be controlled through the hydraulic control proportion, and the flow of the oil port A is controlled; the cartridge valve has the advantages of simple and reasonable structure, low manufacturing cost, convenient integrated design and capability of simplifying a hydraulic oil circuit.
In a further technical scheme, when the valve core is in the middle position, the oil port B is communicated with the hydraulic control oil port Y sequentially through the first through-flow hole, the first annular through-flow groove, the fifth through-flow hole and the third through-flow hole, the oil port A is communicated with the hydraulic control oil port Y sequentially through the second through-flow hole, the second annular through-flow groove, the sixth through-flow hole and the third through-flow hole, and the oil port P is not communicated with the oil port A and the oil port B; when the valve core is in the left position, the oil port P is communicated with the oil port B; and when the valve core is positioned at the right position, the oil port P is communicated with the oil port A.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the hydraulic control system is designed in a plug-in mounting mode, is compact, simple and reasonable in size, and can proportionally control the output flow of the oil port A and the oil port B and unload the oil port A and the oil port B in a middle position.
(2) The hydraulic control is used for controlling the communication area of the oil port P and the oil ports A and B, and the communication of the oil port A or the oil port B and the oil port T is not required to be controlled like a multi-way valve in the prior art, so that the hydraulic oil circuit is simpler, the integrated design is conveniently carried out by using other types of cartridge valves, the oil circuit of the whole hydraulic system can be simplified, the complexity of the whole hydraulic system is reduced, and the volume and the weight of a hydraulic valve and a valve block are reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a hydraulic schematic of the present invention;
fig. 3 is a hydraulic schematic diagram of the present invention in use.
Detailed Description
Referring to fig. 1-3, a plug-in type proportional valve includes a plug-in valve body 9, a valve hole 901 penetrating left and right is arranged in the plug-in valve body 9, and a valve core 8 is slidably connected in the valve hole 901; a first annular groove 902, a second annular groove 903 and a third annular groove 904 are sequentially arranged on the outer side surface of the plug-in valve body 9 from left to right, a B oil port 92 and a first through flow hole 9B which are communicated with the valve hole 901 are arranged in the first annular groove 902, a P oil port 93 which is communicated with the valve hole 901 is arranged in the second annular groove 903, and an a oil port 91 and a second through flow hole 9c which are communicated with the valve hole 901 are arranged in the third annular groove 904; a threaded sleeve 1 is installed at the left end of the plug-in valve body 9, a mounting hole 1c with the right end communicated with the valve hole 901 is formed in the threaded sleeve 1, and a transmission rod 3 in threaded connection with the left end of the valve core 8 is connected in the mounting hole 1c in a sliding mode; a plug 7 sleeved on the transmission rod 3 with a gap is installed at the left end of the valve hole 901, a return spring 4 is sleeved on the outer side of the transmission rod 3 in the installation hole 1c, a first spring seat 6 sleeved on the transmission rod 3 is arranged between the right end of the return spring 4 and the plug 7, and the right end of the first spring seat 6 penetrates through the gap between the plug 7 and the transmission rod 3 and extends into the valve hole 901 to compress the return spring 4 through the first spring seat 6 when the valve core 8 moves leftwards; a second spring seat 2 sleeved on the transmission rod 3 is arranged between the left end of the reset spring 4 and the plug 11, and a convex shoulder is arranged at the left end of the transmission rod 3 and used for compressing the reset spring 4 through the second spring seat 2 when the valve core 8 drives the transmission rod 3 to move rightwards; a fourth annular groove 101 is formed in the outer side surface of the threaded sleeve 1, an X hydraulic control oil port 102 communicated with the mounting hole 1c is formed in the fourth annular groove 101, and a Y hydraulic control oil port 94 is formed at the right end of the valve hole 901;
a third through-flow hole 8c is formed in the valve core 8 along the axial direction of the valve core, the right end of the third through-flow hole 8c is communicated with the Y hydraulic control oil port 94, a first shoulder 8d and a second shoulder 8e are sequentially arranged on the side surface of the valve core 8 from left to right, and a left control cavity 9d is formed between the first shoulder 8d and the plug 7; be equipped with first annular through-flow groove 84 on the lateral surface of first shoulder 803, be equipped with second annular through-flow groove 83 on the lateral surface of second shoulder 8e, be equipped with in the case 8 and be used for communicateing the fifth through-flow hole 8a of first annular through-flow groove 84 and third through-flow hole 8c to and be used for communicateing the sixth through-flow hole 8b of second annular through-flow groove 83 and third through-flow hole 8 c.
As shown in fig. 1, when the X hydraulic control port 102 and the Y hydraulic control port 94 are both communicated with the tank, the spool 8 is in the neutral position. At this time, the oil from the a oil port 91 returns to the Y hydraulic control oil port 94 through the first through-flow hole 9b, the first annular through-flow groove 84, the fifth through-flow hole 8a, and the third through-flow hole 8c for unloading; the oil liquid in the B oil port 92 returns to the Y hydraulic control port 94 through the second through-flow hole 9c, the second annular through-flow groove 83, the sixth through-flow hole 8B and the third through-flow hole 8c for unloading; when the hydraulic pressure principle diagram is used in combination with fig. 3, when the hydraulic pressure balance valve does not work, the oil port a and the oil port B can be unloaded, so that the first balance valve 17a and the second balance valve 17B in the hydraulic system can be reliably in a stop state, and meanwhile, the oil port P is not communicated with the oil port a and the oil port B.
When the external hydraulic control returns oil from the X hydraulic control port 102 and the Y hydraulic control port 94, the valve element 8 moves leftward from the middle position and the left end of the valve element 8 abuts against the first spring seat 6 to make the first spring seat 6 move leftward to compress the return spring 4, the first annular through flow groove 84 is gradually disconnected from the first through flow hole 9B, and the second annular through flow groove 83 is gradually disconnected from the second through flow hole 9c, so that the valve element 8 disconnects the communication between the oil ports a and B91 and the third through flow hole 8c and stops unloading; meanwhile, the valve core 8 gradually opens the B oil port 92, and the control pressure of the opening Y of the B oil port 92 is proportional to the control pressure of the hydraulic control oil port 94, so that the opening of the B oil port 92 can be controlled in a hydraulic control proportion, and the flow of the B oil port 92 is controlled.
When the external hydraulic control enables the X hydraulic control port 102 to feed oil and the Y hydraulic control port 94 to return oil, the valve core 8 moves rightwards from the middle position and the valve core 8 drives the transmission rod 3 to move rightwards, the transmission rod 3 drives the second spring seat 2 to move rightwards through a shoulder at the left end of the transmission rod 3 to compress the return spring 4, the first annular through flow groove 84 is gradually disconnected from the first through flow hole 9B, and the second annular through flow groove 83 is gradually disconnected from the second through flow hole 9c, so that the valve core 8 disconnects the communication between the oil ports a 91 and B92 and the third through flow hole 8c and stops unloading; meanwhile, the valve core 8 gradually opens the oil port a 91, and the opening degree of the oil port a 91 is in direct proportion to the control pressure of the X hydraulic control oil port 102, so that the opening size of the oil port a 91 can be controlled through hydraulic control proportion, and the flow of the oil port a 91 is controlled.
As shown in fig. 3, when the X-hydraulic control port 102 returns oil and the Y-hydraulic control port 94 feeds oil, the communication area of the P oil port 93 and the B oil port 92 can be controlled by the pressure of the Y-hydraulic control port 94, so as to control the flow of the B oil port 92, the oil enters the rod cavity of the hydraulic cylinder 18 from the outlet of the hydraulic pump 15 through the P oil port 93, the B oil port 92 and the second check valve 16B to push the hydraulic cylinder 18 to move leftward, meanwhile, the pressure of the B oil port 92 controls the first balance valve 17a to open, and the oil in the rodless cavity of the hydraulic cylinder 18 returns to the tank through the first balance valve 17 a.
As shown in fig. 3, when the X-hydraulic control port 102 feeds oil and the Y-hydraulic control port 94 returns oil, the communication area of the P oil port 93 and the a oil port 91 can be controlled by the pressure of the X-hydraulic control port 102, so as to control the flow of the a oil port 91, the oil enters the rodless cavity of the hydraulic cylinder 18 from the outlet of the hydraulic pump 15 through the P oil port 93, the a oil port 91 and the first check valve 16a to push the hydraulic cylinder 18 to move right, meanwhile, the pressure of the a oil port 91 controls the second balance valve 17b to open, and the oil in the rod cavity of the hydraulic cylinder 18 returns to the tank through the second balance valve 17 b.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. A plug-in type proportional valve is characterized by comprising a plug-in valve body, wherein a valve hole penetrating left and right is formed in the plug-in valve body, and a valve core is connected in the valve hole in a sliding manner; a first annular groove, a second annular groove and a third annular groove are sequentially arranged on the outer side surface of the plug-in valve body from left to right, a B oil port and a first through hole which are communicated with the valve hole are formed in the first annular groove, a P oil port which is communicated with the valve hole is formed in the second annular groove, and an A oil port and a second through hole which are communicated with the valve hole are formed in the third annular groove; the left end of the plug-in valve body is provided with a threaded sleeve, the threaded sleeve is internally provided with a mounting hole of which the right end is communicated with the valve hole, and a transmission rod in threaded connection with the left end of the valve core is connected in the mounting hole in a sliding manner; the left end of the valve hole is provided with a plug which is sleeved on the transmission rod in a clearance mode, the outer side of the transmission rod in the mounting hole is sleeved with a return spring, a first spring seat which is sleeved on the transmission rod is arranged between the right end of the return spring and the plug, and the right end of the first spring seat penetrates through the plug and extends into the valve hole to be used for compressing the return spring through the first spring seat when the valve core moves leftwards; a second spring seat sleeved on the transmission rod is arranged between the left end of the reset spring and the plug, and a convex shoulder is arranged at the left end of the transmission rod and used for compressing the reset spring through the second spring seat when the valve core drives the transmission rod to move rightwards; a fourth annular groove is formed in the outer side face of the threaded sleeve, an X hydraulic control oil port communicated with the mounting hole is formed in the fourth annular groove, and a Y hydraulic control oil port is formed in the right end of the valve hole;
a third through hole is formed in the valve core along the axial direction of the valve core, the right end of the third through hole is communicated with the Y hydraulic control oil port, a first convex shoulder and a second convex shoulder are sequentially arranged on the side surface of the valve core from left to right, and a left control cavity is formed between the first convex shoulder and the plug; be equipped with first annular through-flow groove on the lateral surface of first convex shoulder, be equipped with second annular through-flow groove on the lateral surface of second convex shoulder, be equipped with the fifth through-flow hole that is used for communicateing first annular through-flow groove and third through-flow hole in the case to and be used for communicateing the sixth through-flow hole of second annular through-flow groove and third through-flow hole.
2. The cartridge type proportional valve of claim 1, wherein when the valve core is in the middle position, the oil port B is communicated with the hydraulic oil port Y through a first through flow hole, a first annular through flow groove, a fifth through flow hole and a third through flow hole in sequence, the oil port A is communicated with the hydraulic oil port Y through a second through flow hole, a second annular through flow groove, a sixth through flow hole and a third through flow hole in sequence, and the oil port P is not communicated with the oil port A and the oil port B; when the valve core is in the left position, the oil port P is communicated with the oil port B; and when the valve core is positioned at the right position, the oil port P is communicated with the oil port A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736146.0A CN108506266B (en) | 2018-07-06 | 2018-07-06 | Plug-in type proportional valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736146.0A CN108506266B (en) | 2018-07-06 | 2018-07-06 | Plug-in type proportional valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506266A CN108506266A (en) | 2018-09-07 |
| CN108506266B true CN108506266B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810736146.0A Active CN108506266B (en) | 2018-07-06 | 2018-07-06 | Plug-in type proportional valve |
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| Country | Link |
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| CN (1) | CN108506266B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878033B (en) * | 2020-07-24 | 2023-11-10 | 宁波真格液压科技有限公司 | Underground double-channel check valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450583A (en) * | 1990-06-15 | 1992-02-19 | Matsushita Electric Ind Co Ltd | Flow control device |
| JPH1163284A (en) * | 1997-08-26 | 1999-03-05 | Hitachi Ltd | Selector valve |
| CN101629587B (en) * | 2009-08-06 | 2011-05-11 | 宁波汉商液压有限公司 | Hydraulic balance valve |
| CN101886642A (en) * | 2010-07-26 | 2010-11-17 | 海门市油威力液压工业有限责任公司 | Pilot-operated electrical feedback proportional direction valve |
| CN102678645B (en) * | 2012-05-31 | 2014-10-29 | 常德中联重科液压有限公司 | Direct-acting overflow valve, direct-acting overflow valve group and hydraulic overflow loop |
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2018
- 2018-07-06 CN CN201810736146.0A patent/CN108506266B/en active Active
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| CN108506266A (en) | 2018-09-07 |
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Effective date of registration: 20211028 Address after: 241000 Kechuang 3rd road, Anhui Xinwu Economic Development Zone, Wuhu County, Wuhu City, Anhui Province Applicant after: Wuhu Pfister electrohydraulic Technology Co.,Ltd. Address before: No. 255, 1st floor, building 1, Fengshou street, Chaoan South Road, zumiao street, Chancheng District, Foshan City, Guangdong Province Applicant before: FOSHAN XINZHUO PAISI MACHINERY TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A plug-in proportional valve Effective date of registration: 20230531 Granted publication date: 20211123 Pledgee: Wuhu Wanyi District sub branch of China Postal Savings Bank Co.,Ltd. Pledgor: Wuhu Pfister electrohydraulic Technology Co.,Ltd. Registration number: Y2023980042521 |