CN110529446A - A kind of digital control flow inserted valve and its control method - Google Patents
A kind of digital control flow inserted valve and its control method Download PDFInfo
- Publication number
- CN110529446A CN110529446A CN201910838898.2A CN201910838898A CN110529446A CN 110529446 A CN110529446 A CN 110529446A CN 201910838898 A CN201910838898 A CN 201910838898A CN 110529446 A CN110529446 A CN 110529446A
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- Prior art keywords
- valve
- spool
- cavity
- encoder
- pilot valve
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Classifications
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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
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Servomotors (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention discloses a kind of digital control flow inserted valve and its control method, it is related to technical field of hydraulic pressure, primary structure includes main valve, digital reversal valve and encoder, program is write on computers, pass through driver, drive stepper motor rotation, drive pilot valve mobile, pilot valve commutation, then hydraulic oil driving inserting valve core is mobile, is converted to rotating signal transmitting by lead screw pair thereon and is given to encoder, encoder feeds back inserted valve spool position signal into program, the displacement of adjustment pilot valve in time, completes closed loop control function.Bidirectional traffics control can be achieved in the present invention；Using digital control technology to spool position closed-loop control, compared with manual inserted valve, there is fast response time, control advantage with high accuracy；Compared with electro-hydraulic servo control inserted valve, digital controlled signal does not have to introduce analog quantity, and anti-electromagnetic interference capability is strong, more stable, and advantage of lower cost.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, more particularly to a kind of digital control flow inserted valve and its control method.
Background technique
Flow inserted valve is a kind of common Hydraulic Elements, for adjusting the flow of hydraulic oil.With electrohydraulic servo system
Development in fields such as space flight and aviation, ship, metallurgy, flow inserted valve are widely used in the industries such as hydraulic press, ceramic press, tool
There is the features such as flow is big, response is fast, high pressure resistant, the service life is long, meets quick, steady, high-precision technical requirements.
A kind of manually flow controllable cartridge valve is described in a kind of flow controllable cartridge valve (CN208024895U), is passed through
Rotation adjustment handle drives screw rod upper and lower position mobile, and then control valve core aperture, a kind of unidirectional speed regulation screw-in cartridge valve
(CN109654261A) a kind of inserted valve by droop adjustment screw control valve core aperture is described in, above-mentioned manual inserted valve is being adjusted
Guide pressure increases when whole spool aperture, causes to adjust handle, droop adjustment screw rotation difficulty, and cannot achieve quick response and height
The requirement of precision.A kind of proportional flow inserted valve and its control method (CN106855070B) and a kind of ratio of unsteady flow flow gain
The flow inserted valve introduced in example inserted valve (CN102418721A) two patents, is believed spool displacement by displacement sensor
Number feedback into controller, utilize pilot valve control bound realize closed-loop control.Electro-hydraulic servo control be flow inserted valve the most
Common control method is generally made of the control valve of one high response and the secondary valve of a hydraulic amplification, and main valve is adopted
With the mode of active control, pilot valve utilizes the displacement sensing of main valve using the electrohydraulic servo valve or proportioning valve of high response
The travel feedback of spool is carried out closed-loop control to integrated amplification controller, and then to the aperture of valve port of main valve by device.Which
Position-force control is directly carried out, may be implemented to accurately control flow, but the servo valve of superior performance, amplification board, control
The elements such as device, displacement sensor are expensive, cause the flow inserted valve of electro-hydraulic servo control expensive, lead in hydraulic technique
The application and popularizations in domain are subject to certain restrictions.
Digital hydraulic is digitizing technique and the product that hydraulic technique combines, and is changing traditional electro-hydraulic servo system
System.Since digital hydraulic element has, structure is simple, at low cost, to be easily achieved intelligentized control method, control flexible and convenient etc. excellent
Point, is widely used in the industrial production.
In conclusion studying a kind of digital control flow inserted valve and its control method, it is of great significance.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of digital control flow inserted valve and its control method, can
Improvement manually controls that precision is low, the defect of low-response, and can evade the high cost problem of electro-hydraulic servo control.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of digital control flow inserted valve, including encoder, pilot valve, valve body and spool；
The encoder is set to the body top, and the spool is set in the valve body, and the valve core inside is set
It is equipped with a connected pathways, the body base is provided with a primary valve, and the pilot valve is provided with and controls with the encoder
The connector of device electrical connection processed；
The first cavity and the second cavity are provided between the spool and the valve body, first cavity is set to described
The top of second cavity；First cavity is connected with the first interface of the pilot valve, second cavity and the elder generation
The second interface of pilot valve is connected；
Power switching device is provided between the spool and the central axis of the encoder, the power switching device is used
In will from the pressure conversion of the connected pathways be the encoder central axis driving force；
The valve body lower portion is provided with oil inlet and oil return opening, and the oil inlet is located at below the oil return opening.
Optionally, the pilot valve is digital reversal valve.
Optionally, the pilot valve is two-way reversal valve.
Optionally, the power switching device includes nut and screw rod, and the nut is set in the valve body and is located at
Right above the connected pathways, and the nut linear movement, the screw rod can only be rotatably set in the valve body
In the nut, the top of the screw rod is connected with the central axis of the pilot valve.
Optionally, the power switching device further includes axle sleeve, and the central axis of the screw rod and the pilot valve passes through institute
State axle sleeve connection.
Optionally, spool middle and lower part side wall is provided with a limiting groove, the body wall and the limiting groove
Place is provided with a stop screw, and the tip of the stop screw is protruded into the limiting groove, and the height of the limiting groove is big
In the diameter of the stop screw.
A kind of control method of digital control flow inserted valve, determines the moving direction of the spool；
When needing to adjust aperture or switching oil circuit, first cavity and second sky are adjusted by the pilot valve
The pressure in intracavitary portion moves up or down the spool, to switch the primary valve and the oil inlet and the oil return
Connected relation between mouthful.
Optionally, according to the direction of rotation of the screw rod of encoder acquisition and rotation angle, pass through control device
The pilot valve is controlled, to control the movement of the spool.
The present invention achieves following technical effect compared with the existing technology:
1, digital control flow inserted valve provided by the present invention, using digital control technology to spool position closed loop control
System has fast response time, controls advantage with high accuracy compared with manual inserted valve；Compared with electro-hydraulic servo control inserted valve,
Digital controlled signal does not have to introduce analog quantity, and anti-electromagnetic interference capability is strong, more stable, and advantage of lower cost.
2, digital control flow inserted valve provided by the present invention, can by pilot valve control bound valve port opening, into
And flow is controlled, the switching of oil inlet and outlet can also be controlled, realizes bidirectional traffics control, reduces power consumption, is prevented
System heat generation, and it is easy to implement the starting of hydraulic pump airport logistic park, improve the service life of pump and the efficiency of system.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram of digital control flow inserted valve in the present invention；
Fig. 2 is the hydraulic schematic diagram of digital control flow inserted valve in the present invention；
Fig. 3 is the flow chart of the control method of digital control flow inserted valve in the present invention；
In figure: 1, encoder；2, slotted screw；3, soket head cap screw；4, upper plate；5, middle plate；6, axle sleeve；7, standby female；8,
Thrust bearing；9, screw rod；10, nut；11, spool；12, the first cavity；13, the second cavity；14, valve pocket；15, stop screw；
16, digital reversal valve；17, flange；18, hexagonal socket head plug；19, hexagon thin nut.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one:
As shown in Figs. 1-2, the present embodiment provides a kind of digital control flow inserted valves, including encoder 1, pilot valve, valve
Body and spool 11.
Encoder 1 is set to body top, and spool 11 is set in valve body, and spool 11 is internally provided with a connected pathways,
A communication port is provided in the bottom sidewall of connected pathways, communication port is for being connected to oil inlet and oil return opening, body base setting
There is a primary valve, connected pathways is connected with primary valve, and pilot valve is provided with connecing of being electrically connected with control device with encoder 1
Head.
The first cavity 12 and the second cavity 13 are provided between spool 11 and valve body, the first cavity 12 is set to the second cavity
13 top；First cavity 12 is connected with the first interface of pilot valve, and the second cavity 13 is connected with the second interface of pilot valve
It is logical.
Power switching device is provided between spool 11 and the central axis of encoder 1, power switching device will be for that will come from
The pressure conversion of connected pathways is the driving force of the central axis of encoder 1.
Valve body lower portion is provided with oil inlet and oil return opening, and oil inlet is located at below oil return opening.
In specific embodiment, valve body include the upper plate 4 from top to bottom set gradually, middle plate 5, flange 17, main cavity and
Lower chamber, upper plate 4, middle plate 5 and flange 17 are fixed at the top of main cavity by soket head cap screw 3, and lower chamber is sealingly fastened in master
The lower part of cavity.Encoder 1 is fixed on the top of upper plate 4, and the central axis of encoder 1 is extend into inside middle plate 5 through upper plate 4
It in cavity, is connected between central axis and screw rod 9 by axle sleeve 6, screw rod 9 is provided with through middle plate 5 and between screw rod 9 and middle plate 5
Thrust bearing 8, the lower part of screw rod 9 and nut 10 are cooperatively connected, and nut 10 and 17 inner wall of flange are formed and limited, i.e., inside flange 17
It limits nut 10 to rotate, but nut 10 can move up and down inside flange 17, thus, in pressure oil running through by spool 11
When channel flows to 10 bottom of nut, pressure oil can push the upward linear movement of nut 10, so that screw rod 9 is rotated, into
And the central axis rotation of encoder 1 is driven, so that encoder 1 is capable of detecting when the rotation direction and rotational angle of screw rod 9.
It is provided with an annular protrusion in the middle part of valve body, forms sealing structure between the annular protrusion and the inner wall of main cavity,
Sealing structure is formed between main cavity and lower chamber respectively on the top and lower part of valve body, to be formed between valve body and valve seat
Two mutually independent first cavitys 12 and the second cavity 13.
Pilot valve in the present embodiment uses bi-directional digital reversal valve 16, and two connectors of pilot valve are respectively communicated with first
Cavity 12 and the second cavity 13, so as to control the pressure in the first cavity 12 and the second cavity 13 by pilot valve, thus
Spool 11 is set to move up and down in valve body.
11 middle and lower part side wall of spool is provided with a limiting groove, is provided with a stop screw at body wall and limiting groove
15, the tip of stop screw 15 is protruded into limiting groove, and the height of limiting groove is greater than the diameter of stop screw 15, limiting groove
Height depend on the distance between oil inlet and oil return opening, that is, when spool 11 moves up and down, will not make spool 11 have it is excessive
Moving distance, so that communication port is individually connected to oil inlet or oil return opening.
Embodiment two:
As shown in figure 3, the present embodiment provides a kind of control method of the digital control flow inserted valve of embodiment one kind, root
Direction of rotation and rotation angle according to the screw rod 9 of the acquisition of encoder 1, determine the moving direction of spool 11, pass through control device control
Pilot valve processed, thus the movement of control valve core 11.
When needing to adjust aperture or switching oil circuit, adjusted inside the first cavity 12 and the second cavity 13 by pilot valve
Pressure moves up or down spool 11, to switch the connected relation between primary valve and oil inlet and oil return opening.
Apply that a specific example illustrates the principle and implementation of the invention in this specification, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (8)
1. a kind of digital control flow inserted valve, which is characterized in that including encoder, pilot valve, valve body and spool；
The encoder is set to the body top, and the spool is set in the valve body, and the valve core inside is provided with
One connected pathways, the body base are provided with a primary valve, and the pilot valve and the encoder are provided with and control dress
Set the connector of electrical connection；
The first cavity and the second cavity are provided between the spool and the valve body, first cavity is set to described second
The top of cavity；First cavity is connected with the first interface of the pilot valve, second cavity and the pilot valve
Second interface be connected；
Power switching device is provided between the spool and the central axis of the encoder, the power switching device is used for will
Pressure conversion from the connected pathways is the driving force of the central axis of the encoder；
The valve body lower portion is provided with oil inlet and oil return opening, and the oil inlet is located at below the oil return opening.
2. digital control flow inserted valve according to claim 1, which is characterized in that the pilot valve is number commutation
Valve.
3. digital control flow inserted valve according to claim 1, which is characterized in that the pilot valve is two-way commutation
Valve.
4. digital control flow inserted valve according to claim 1, which is characterized in that the power switching device includes spiral shell
Female and screw rod, the nut is set in the valve body and is located at right above the connected pathways, and the nut can only be in institute
Linear movement in valve body is stated, the screw rod is rotatably set in the nut, the top of the screw rod and the pilot valve
Central axis be connected.
5. digital control flow inserted valve according to claim 4, which is characterized in that the power switching device further includes
Axle sleeve, the screw rod are connect with the central axis of the pilot valve by the axle sleeve.
6. digital control flow inserted valve according to claim 1, which is characterized in that the setting of spool middle and lower part side wall
There is a limiting groove, is provided with a stop screw, the tip of the stop screw at the body wall and the limiting groove
It protrudes into the limiting groove, the height of the limiting groove is greater than the diameter of the stop screw.
7. a kind of control method of digital control flow inserted valve described in -6 according to claim 1, which is characterized in that
Determine the moving direction of the spool；
When needing to adjust aperture or switching oil circuit, adjusted in first cavity and second cavity by the pilot valve
The pressure in portion moves up or down the spool, with switch the primary valve and the oil inlet and the oil return opening it
Between connected relation.
8. a kind of control method of digital control flow inserted valve according to claim 7, which is characterized in that according to described
The direction of rotation of the screw rod of encoder acquisition and rotation angle, control the pilot valve by control device, to control
The movement of the spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838898.2A CN110529446B (en) | 2019-09-05 | 2019-09-05 | Digital control flow cartridge valve and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910838898.2A CN110529446B (en) | 2019-09-05 | 2019-09-05 | Digital control flow cartridge valve and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110529446A true CN110529446A (en) | 2019-12-03 |
| CN110529446B CN110529446B (en) | 2021-05-14 |
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ID=68667129
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910838898.2A Active CN110529446B (en) | 2019-09-05 | 2019-09-05 | Digital control flow cartridge valve and control method thereof |
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| Country | Link |
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| CN (1) | CN110529446B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985472A (en) * | 2019-12-30 | 2020-04-10 | 广东力源液压机械有限公司 | Cartridge valve of hydraulic pile driving system and dynamic output control method thereof |
| CN111022407A (en) * | 2019-12-30 | 2020-04-17 | 广东力源液压机械有限公司 | High-flow cartridge valve and control method thereof |
| CN112303053A (en) * | 2020-09-21 | 2021-02-02 | 南京威孚金宁有限公司 | Control system and control method for electric proportional threaded cartridge valve group |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074818A (en) * | 2014-07-07 | 2014-10-01 | 武汉海力威机电科技有限公司 | Direct valve feedback hydraulic synchronization device |
| CN104481949A (en) * | 2014-11-27 | 2015-04-01 | 上海立新液压有限公司 | Plug-in proportional throttle valve |
-
2019
- 2019-09-05 CN CN201910838898.2A patent/CN110529446B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074818A (en) * | 2014-07-07 | 2014-10-01 | 武汉海力威机电科技有限公司 | Direct valve feedback hydraulic synchronization device |
| CN104481949A (en) * | 2014-11-27 | 2015-04-01 | 上海立新液压有限公司 | Plug-in proportional throttle valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985472A (en) * | 2019-12-30 | 2020-04-10 | 广东力源液压机械有限公司 | Cartridge valve of hydraulic pile driving system and dynamic output control method thereof |
| CN111022407A (en) * | 2019-12-30 | 2020-04-17 | 广东力源液压机械有限公司 | High-flow cartridge valve and control method thereof |
| CN112303053A (en) * | 2020-09-21 | 2021-02-02 | 南京威孚金宁有限公司 | Control system and control method for electric proportional threaded cartridge valve group |
| CN112303053B (en) * | 2020-09-21 | 2022-08-09 | 南京威孚金宁有限公司 | Control system and control method for electric proportional threaded cartridge valve group |
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| Publication number | Publication date |
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| CN110529446B (en) | 2021-05-14 |
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