CN111336149B - Valve plate of multi-way valve - Google Patents
Valve plate of multi-way valve Download PDFInfo
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- CN111336149B CN111336149B CN202010224239.2A CN202010224239A CN111336149B CN 111336149 B CN111336149 B CN 111336149B CN 202010224239 A CN202010224239 A CN 202010224239A CN 111336149 B CN111336149 B CN 111336149B
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- valve
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a valve plate of a multi-way valve, which comprises a main body valve, wherein the main body valve is provided with a valve body, a first valve core and a second valve core, one end of the first valve core is connected with a first linear motor, the other end of the first valve core is connected with a first servo motor, one end of the second valve core is connected with a second linear motor, and the other end of the second valve core is connected with a second servo motor; an oil inlet, an oil outlet, a first working oil port and a second working oil port are formed in the surface of the valve body, and an oil way for communicating the first valve core and the second valve core is formed in the valve body; the first valve core and the second valve core are respectively provided with a circumferential strip code group along the circumferential direction, and an axial strip code group along the axial direction; and photoelectric sensors are respectively arranged at the corresponding positions of the circumferential strip code group and the axial strip code group. The valve plate can realize accurate detection of the position of the valve core, so that independent control of load can be realized, and the requirements of various working occasions can be met.
Description
Technical Field
The invention belongs to the field of multi-way valves, and particularly relates to a valve plate of a multi-way valve.
Background
The multi-way reversing valve is a multi-way valve for short, and is a multifunctional integrated valve which takes two or more reversing valves as main bodies and integrates the reversing valve, an overload valve, a one-way valve and a brake valve into a whole.
The multi-way valve is mainly divided into an integral type and a combined type according to different control modes. The combined multi-way valve is widely applied due to the advantages of convenient composition, strong universality and the like. The valve plate of the multi-way valve is used as a key element of the combined multi-way valve, and the performance of the valve plate directly influences the working quality of the multi-way valve. The valve plate of the existing multi-way valve is adjusted by manual or other control methods, so that the accurate position of the valve core is difficult to measure, and the accurate control of the load flow is difficult to realize.
Disclosure of Invention
The invention aims to solve the technical problem of providing a valve plate of a multi-way valve, which can realize accurate detection of the position of a valve core, thereby realizing independent load control and meeting the requirements of various working occasions.
In order to solve the technical problems, the invention adopts the following technical scheme:
a valve block of a multi-way valve comprises a main body valve, wherein the main body valve is provided with a valve body, a first valve core and a second valve core, one end of the first valve core is connected with a first linear motor, the other end of the first valve core is connected with a first servo motor, one end of the second valve core is connected with a second linear motor, and the other end of the second valve core is connected with a second servo motor; an oil inlet, an oil outlet, a first working oil port and a second working oil port are formed in the surface of the valve body, and an oil way for communicating the first valve core and the second valve core is formed in the valve body; and the number of the first and second groups,
the first valve core and the second valve core are respectively provided with a circumferential strip code group along the circumferential direction, and are provided with an axial strip code group along the axial direction; and photoelectric sensors are respectively arranged at the corresponding positions of the circumferential strip code group and the axial strip code group.
In a preferred embodiment, the oil flows into the valve body from the oil inlet, sequentially flows through the first valve core and the first working oil port, sequentially flows through the second working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet;
when oil liquid is reversed, the oil liquid flows into the valve body from the oil inlet, sequentially flows through the first valve core and the second working oil port, sequentially flows through the first working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet.
In a preferred embodiment, a first valve sleeve is arranged between the valve body and the first valve core, and a second valve sleeve is arranged between the valve body and the second valve core; the first valve core and the second valve core are respectively provided with two shoulders, the shoulders are circumferentially provided with symmetrical throttle valve ports, and the first valve sleeve and the second valve sleeve are respectively circumferentially provided with an oil inlet window, an oil outlet window and two working windows.
In a preferred embodiment, the throttle ports on the two lands of the first valve spool are circumferentially staggered, and the throttle ports on the two lands of the second valve spool are circumferentially staggered.
In a preferred embodiment, the second valve core is provided with a throttling valve port on a shoulder adjacent to the first working oil port, a radially through rectangular groove is formed in the throttling valve port, and an oil path communicating the through rectangular groove and an oil outlet window of the second valve sleeve is arranged inside the second valve core.
In a preferred embodiment, the other land of the second valve core is provided with an annular groove facing the oil outlet window of the second valve sleeve, so that the throttling valve port of the land is communicated with the oil outlet window of the second valve sleeve.
In a preferred embodiment, two shoulders of the first valve core are provided with opposite annular grooves, so that throttling valve ports of the two shoulders are communicated with the oil inlet window of the first valve sleeve.
In a preferred embodiment, one end of each of the first valve core and the second valve core is sleeved with a return spring.
In a preferred embodiment, the axis of the first valve core is parallel to the axis of the second valve core, the oil inlet and the oil outlet are arranged on the side surfaces of the valve body parallel to the plane where the axes of the two valve cores are located, and the oil inlet and the oil outlet respectively penetrate through the valve body to form through holes; the first working oil port and the second working oil port are arranged on the side face of the valve body perpendicular to the plane where the axes of the two valve cores are located.
In a preferred embodiment, the valve body has a rectangular structure.
The invention has the following beneficial effects:
1. the valve plate of the multi-way valve can realize accurate detection of the position of the valve core, including axial position detection and circumferential position detection.
2. The valve plate of the multi-way valve realizes the valve core position detection function, can be used for realizing closed-loop load independent control, and meets the control precision requirements of various working conditions.
3. The valve plate of the multi-way valve can realize the circumferential and axial movement of the valve core, and the control mode of the valve core is diversified.
4. The valve plate of the multi-way valve adopts the return spring which can be used for zero position recovery of axial moving positions of two independent valve cores and can also be used for preventing interference of hydraulic power so as to ensure the stability of the valve cores in the moving process.
Drawings
FIG. 1 is a perspective view of a valve plate of a multi-way valve according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of a valve plate of a multi-way valve according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of the valve body;
fig. 4 is a perspective view of the valve sleeve;
FIG. 5 is a sectional view and an exploded view of a valve sleeve and valve core assembly;
FIG. 6 is a schematic view of a method of detecting a position of a valve spool;
fig. 7 is a schematic view of an oil flow path inside a valve plate and a schematic view of a valve core rotation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, the invention discloses a valve plate of a multi-way valve, which comprises four motors controlled independently, a main body valve 5, a valve core position detection device 3 and related connecting pieces. The four motors comprise a first servo motor 11, a second servo motor 12, a first linear motor 71 and a second linear motor 72; the main body valve 5 comprises a return spring 50, a valve sleeve 51 (comprising a first valve sleeve matched with a first valve core and a second valve sleeve matched with a second valve core), two completely independent first valve cores 521 and second valve cores 522 and a valve body 53; the power transmission part of the valve plate comprises a coupler 30, a connecting sleeve 301 and a plug 54; the spool position detection device 3 includes four photosensors 31, 32, 33, 34 and a mounting plate 35. One end of each valve core (the first valve core 521 and the second valve core 522) is connected with the servo motors (the first servo motor 11 and the second servo motor 12) through the connecting sleeve and the coupling, and the valve cores can be driven to rotate; the other end of the valve core (the first valve core 521 and the second valve core 522) is connected with the linear motor through the plug, and can drive the valve core to axially move.
A valve sleeve mounting groove 531 is formed in the valve body, and the valve sleeve comprises a working window 511 (including 511a and 511b), an oil inlet window 512a and an oil outlet window 512 b. Taking the assembly structure of the first valve element 521 as an example, the assembly structure between the first valve element 521 and the valve housing 51 includes a sealing ring 5211, spring housings 5212a and 5212b, a return spring 50, thrust bearings 5213a and 5213b, a pressure equalizing groove 5214, and a plug 54. The two valve cores are provided with two symmetrical rectangular throttle ports 5216 (in addition, the throttle ports can be in other shapes such as triangle, circle and the like; the number of the throttle ports can be 4, 8 and 16, and the like), and the throttle ports on the two shoulders of the same valve core are in a certain dislocation relation along the circumferential direction, so that the two valve cores are matched with each other to realize the independent load control function. The return spring 50 functions as: the valve core can be used for zero restoration of axial movement positions of two independent valve cores on one hand, and can be used for preventing interference of hydraulic force so as to ensure the stability of the valve cores in the movement process on the other hand. The photoelectric sensor of the valve core position detection device is matched with the bar code group 5215 on the valve core, so that the real-time detection function of the valve core position is realized.
The valve core position detection method adopted by the valve plate of the multi-way valve is as follows:
the left ends of the first valve spool 521 and the second valve spool 522 are respectively provided with a spool position detection device for monitoring the position of the spool, and the spool position detection device comprises four photoelectric sensors 31, 32, 33 and 34 and an installation cover plate 35 (made of a carbonic acid polyester material, and characterized by high impact strength, good light transmission and excellent electrical characteristics). The bar code group 5215 that cooperates with photoelectric sensor to realize position detection function includes axial bar code group 5215a (be used for detecting axial position) and circumference bar code group 5215b (be used for detecting circumferential position), and the bar code (axial m bar codes, circumference n bar codes) can set up to the black, arranges along axial or circumference equipartition according to the different principle of width. The four photosensors 31, 32, 33, and 34 are mounted inside the mounting cover 35 to be fixed, and are respectively located at left ends (i.e., near servo motor ends) of the first valve element 521 and the second valve element 522. When the valve core moves axially, the photoelectric sensors 31 and 33 can determine the axial position of the valve core according to the detected width of the axial bar code; when the valve core rotates a certain angle, the photoelectric sensors 32 and 34 can determine the circumferential position of the valve core according to the detected circumferential bar code width. The real-time monitoring of the circumferential rotation position and the axial movement position of the two independent valve cores can realize the semi-closed loop and/or closed loop control of the system, and further can improve the control precision. In addition, the real-time position monitoring can also ensure that the monitored real-time position of the valve core can be fed back to the control equipment after the system works, and then corresponding control signals can be sent to the servo motor or the linear motor, so that the automatic resetting of the valve core is realized.
In addition, in order to realize the reversing function of the valve plate of the multi-way valve, the valve plate of the embodiment of the invention exemplarily shows (including but not limited to) the following structural features:
1) an oil inlet P, an oil outlet T, a first working oil port A and a second working oil port B are formed in the surface of the valve body, and an oil way for communicating the first valve core and the second valve core is formed in the valve body.
As shown in fig. 7, the oil flow path includes: the oil liquid flows into the valve body from the oil inlet, sequentially flows through the first valve core and the first working oil port, sequentially flows through the second working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet;
when oil liquid is reversed, the oil liquid flows into the valve body from the oil inlet, sequentially flows through the first valve core and the second working oil port, sequentially flows through the first working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet.
2) A first valve sleeve is arranged between the valve body and the first valve core, and a second valve sleeve is arranged between the valve body and the second valve core; the first valve core and the second valve core are respectively provided with two shoulders, the shoulders are circumferentially provided with symmetrical throttle valve ports, and the first valve sleeve and the second valve sleeve are respectively circumferentially provided with an oil inlet window, an oil outlet window and two working windows.
3) The throttle ports on the two shoulders of the first valve core are staggered along the circumferential direction, and the throttle ports on the two shoulders of the second valve core are staggered along the circumferential direction.
4) The throttling valve port on the shoulder of the second valve core, which is close to the first working oil port, forms a radial through rectangular groove, and an oil path which is communicated with the through rectangular groove and the oil outlet window of the second valve sleeve is arranged in the second valve core.
5) And the other shoulder of the second valve core is provided with an annular groove facing the oil outlet window of the second valve sleeve, so that the throttle valve port of the shoulder is communicated with the oil outlet window of the second valve sleeve.
6) Two shoulders of the first valve core are provided with opposite annular grooves so that the throttle valve ports of the two shoulders are communicated with the oil inlet window of the first valve sleeve.
Besides the above structural features, other oil path structures capable of realizing the oil reversing function of the valve plate are also covered in the protection scope of the invention. In order to facilitate the installation and combination of the valve plates, the following arrangement can be made: the axis of the first valve core is parallel to the axis of the second valve core, the oil inlet and the oil outlet are arranged on the side surfaces of the valve body parallel to the plane where the axes of the two valve cores are located, and the oil inlet and the oil outlet respectively penetrate through the valve body to form through holes; the first working oil port and the second working oil port are arranged on the side surface of the valve body, which is vertical to the plane where the axes of the two valve cores are located; the valve body is of a rectangular structure.
It is to be understood that the exemplary embodiments described herein are illustrative and not restrictive. Although one or more embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (8)
1. The valve block of the multi-way valve is characterized by comprising a main body valve, wherein the main body valve is provided with a valve body, a first valve core and a second valve core, one end of the first valve core is connected with a first linear motor, the other end of the first valve core is connected with a first servo motor, one end of the second valve core is connected with a second linear motor, and the other end of the second valve core is connected with a second servo motor; an oil inlet, an oil outlet, a first working oil port and a second working oil port are formed in the surface of the valve body, and an oil way for communicating the first valve core and the second valve core is formed in the valve body; and the number of the first and second groups,
the first valve core and the second valve core are respectively provided with a circumferential strip code group along the circumferential direction, and are provided with an axial strip code group along the axial direction; photoelectric sensors are respectively arranged at the corresponding positions of the circumferential strip code group and the axial strip code group;
the axis of the first valve core is parallel to the axis of the second valve core, the oil inlet and the oil outlet are arranged on the side face of the valve body parallel to the plane where the axes of the two valve cores are located, and the oil inlet and the oil outlet respectively penetrate through the valve body to form through holes; the first working oil port and the second working oil port are arranged on the side surface of the valve body, which is perpendicular to the plane where the axes of the two valve cores are located;
the valve body is of a rectangular structure.
2. The valve plate of the multi-way valve as claimed in claim 1, wherein oil flows into the valve body from the oil inlet, sequentially flows through the first valve core and the first working oil port, sequentially flows through the second working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet;
when oil liquid is reversed, the oil liquid flows into the valve body from the oil inlet, sequentially flows through the first valve core and the second working oil port, sequentially flows through the first working oil port and the second valve core during oil return, and flows out of the valve body from the oil outlet.
3. The valve plate of the multi-way valve as defined in claim 2, wherein a first valve sleeve is disposed between the valve body and the first valve core, and a second valve sleeve is disposed between the valve body and the second valve core; the first valve core and the second valve core are respectively provided with two shoulders, the shoulders are circumferentially provided with symmetrical throttle valve ports, and the first valve sleeve and the second valve sleeve are respectively circumferentially provided with an oil inlet window, an oil outlet window and two working windows.
4. The valve plate of the multi-way valve according to claim 3, wherein the throttle ports on the two lands of the first valve element are circumferentially staggered, and the throttle ports on the two lands of the second valve element are circumferentially staggered.
5. The valve plate of the multi-way valve as claimed in claim 4, wherein the throttle valve port on the shoulder of the second valve core adjacent to the first working oil port forms a radially through rectangular groove, and an oil path communicating the through rectangular groove with the oil outlet window of the second valve sleeve is arranged in the second valve core.
6. The valve plate of the multi-way valve as claimed in claim 5, wherein the other land of the second valve core is provided with an annular groove facing the oil outlet window of the second valve sleeve, so that the throttling port of the land is communicated with the oil outlet window of the second valve sleeve.
7. The valve plate of the multi-way valve as claimed in any one of claims 4 to 6, wherein two lands of the first valve core are provided with opposite annular grooves so that throttle ports of the two lands are communicated with the oil inlet window of the first valve sleeve.
8. The valve plate of the multi-way valve as claimed in claim 1, wherein one end of the first valve core and one end of the second valve core are respectively sleeved with a return spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224239.2A CN111336149B (en) | 2020-03-26 | 2020-03-26 | Valve plate of multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010224239.2A CN111336149B (en) | 2020-03-26 | 2020-03-26 | Valve plate of multi-way valve |
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| CN111336149A CN111336149A (en) | 2020-06-26 |
| CN111336149B true CN111336149B (en) | 2021-11-05 |
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| CN202010224239.2A Expired - Fee Related CN111336149B (en) | 2020-03-26 | 2020-03-26 | Valve plate of multi-way valve |
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