CN111219373A - Multi-motor direct-drive multi-valve-element multifunctional rotary hydraulic regulating valve - Google Patents
Multi-motor direct-drive multi-valve-element multifunctional rotary hydraulic regulating valve Download PDFInfo
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- CN111219373A CN111219373A CN201811421966.7A CN201811421966A CN111219373A CN 111219373 A CN111219373 A CN 111219373A CN 201811421966 A CN201811421966 A CN 201811421966A CN 111219373 A CN111219373 A CN 111219373A
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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
- 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
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating 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
- 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
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0442—Spindles and actuating means
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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)
Abstract
The invention relates to a multi-motor direct-drive multi-valve-element multifunctional rotary hydraulic regulating valve which comprises a plurality of basic technical units (hereinafter referred to as units) and a valve body or a plurality of valve bodies, wherein the units have the same structure, the same function and the same connecting mode (plug-in type), and the units with different numbers can form regulating valves with different functions; the unit comprises a valve core, a retainer ring, a valve sleeve, a connecting key and a motor. The hydraulic regulating valve can regulate each throttling opening, intelligent self-adaptive control can be realized by changing control software, the working state of the valve can be switched randomly, the control is flexible, the structure is simple, a loop is simplified, the processing is easy, the requirement on the cleanliness of oil is low, the cost is low, and the energy is saved.
Description
Technical Field
The invention relates to the field of hydraulic regulating valves, in particular to a multi-motor direct-drive multi-valve-core multifunctional rotary hydraulic regulating valve.
Background
At present, the modes of driving various hydraulic valves by motors are ubiquitous and are divided into a double-motor driving mode and a single-motor driving mode.
The existing double-motor driven various hydraulic valves generally have complex structures, the double motors drive the double valve cores to work, and the difficulty is increased compared with the same control effect of a single motor for controlling a single core. For example: the invention patent 200510082720.8 discloses a rotary digital directional flow valve without shaft extension, which is composed of a driving valve core and a driven valve core, but the outer circumference of the valve core is provided with teeth and is coupled with a motor through a gear, thereby avoiding some defects of slipping, but the outer circumference of the valve core is processed with teeth, thereby increasing the processing difficulty and having more complex structure; coupling with the motor through the gear also reduces the control accuracy. The invention patent document CN88200510U discloses a "rotary hydraulic servo valve" which has two valve cores rotating relatively and driven by two motors respectively. Because the two valve cores are asymmetric, the valve core on one side is provided with three holes, and the other valve core is provided with an oil return hole, the two valve cores are stressed unevenly, and the oil return hole is arranged on the end cover, so that the end cover is under the action of hydraulic pressure, and the structure is unstable. The invention patent document CN103089732B discloses a "dual-motor driven dual-spool rotary direction throttle valve", which is structurally composed of a spool formed by A, B channels; the other valve core is composed of P, T channels. The two valve cores are driven by respective motors. If the control of each channel needs to be realized, two driving motors need to be respectively coordinated and controlled. Because the valve configuration determines that the control accuracy must be higher than the difference between the port diameter of the P, T valve spool P, T and the port cap pin diameter of P, T in the A, B valve spool annular groove C. Therefore, the two driving motors must have respective position feedbacks, and the precision of the position feedbacks must be higher than the control precision. The invention patent document CN102889254A discloses a dual-drive servo valve and a control method thereof, which has a structure that a motor at one end drives a valve core to rotate into linear motion through a lead screw, and then drives the valve core to slide in a valve body, wherein the structure of the valve core and the valve body is similar to that of a general electromagnetic valve. The nut sleeve at the other end is connected with another motor, the motor at the nut end controls fine adjustment of the opening of the valve hole, and the adjustment precision is limited by machining, thread pitch and precision. Because two motors at two ends are controlled simultaneously, the processing difficulty and the control difficulty are increased. The utility model discloses a single motor-driven single valve element rotary hydraulic valve in the patent documents CN201620751343.6 and cn201610563269.x, which provides a single motor-driven single valve element rotary hydraulic valve, which drives the valve element to rotate by the motor, changes the relative positions of the through hole on the valve body and the through hole on the valve element, and changes the relative positions of the through hole on the valve body and the U-shaped groove on the valve element, so as to realize the reversing function of the hydraulic valve; the pulse signal is changed, so that the angle of the valve core driven by the motor to rotate can be changed, the relative positions of the connection between the hole and the groove on the valve core and the hole on the valve body can be changed, namely the opening degree of the valve port is changed, and the control of the digital valve on the pressure and the flow is realized; the control device with different execution software is configured to realize the function of multiple purposes of one valve; the P, T, A, B port is switched on and off by directly driving the valve core to rotate by the motor, and various control modes are directly realized by rotating the valve core. Utility model patent document CN201720737076.1 discloses "a motor directly drives rotation type awl case hydrovalve", case simple structure, and processing is easy, at the during operation, controls the motor through sensor and controller and rotates, realizes accurate control easily. The valve core is rotated only when the flow or direction needs to be adjusted, the abrasion is small, the valve core can be automatically compensated after abrasion, the hydraulic working characteristic is very suitable, the rubber sealing structure is designed on the valve, the sealing requirement in actual working can be met, and the long-term working performance of the valve is ensured.
In the prior art, a direction control hydraulic valve adopting a slide valve structure can only realize directional control, a pressure or flow hydraulic valve can only realize pressure or flow control, various different control modes cannot be realized on the same valve body, and the function is single. The rotary valve type hydraulic valve can realize the function of multiple purposes by configuring control devices of different execution software.
In summary, the single-spool and dual-spool hydraulic valves in the prior art have the problem that independent control of each throttle orifice cannot be realized.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
In order to solve the problem that independent control of each load port cannot be achieved in the prior art, the invention provides a multi-motor direct-drive multi-valve-core multifunctional rotary hydraulic regulating valve which can control the opening degree of each load port according to the change of working conditions, can achieve load matching and accurate control, and therefore achieves the purpose of energy conservation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-motor direct-drive multi-valve-core multifunctional rotary hydraulic regulating valve comprises a plurality of units and a valve body or a plurality of valve bodies, wherein the units have the same structure and the same function, and regulating valves with different functions can be formed by the units with different numbers;
the unit consists of a valve core, a retainer ring, a valve sleeve, a connecting key and a motor;
the connecting ends of the valve cores are connected with the corresponding motors through connecting keys, and the valve cores are provided with a group of two radial through holes;
the retainer ring is used for limiting the position of the valve core relative to the valve sleeve;
the cover shoulder of valve barrel has fixed a position the valve barrel with the relative position of valve body, the cover shoulder passes through the adapter sleeve to be connected with the motor, the valve barrel is equipped with: the radial through holes are respectively communicated with the radial annular grooves through the adjacent axial grooves;
the connecting sleeve is used for connecting the motor and the disc;
the connecting key is used for connecting the motor shaft and the connecting part;
the motor is provided with an angular displacement sensor and is used for monitoring the rotating angle of the motor;
the valve body is provided with four valve holes which penetrate through the front and the back of the valve body; the valve body is provided with four openings: port P, port T, port A and port B.
The invention further adopts the technical scheme for solving the technical problems that: the regulating valve comprises a plurality of units and a valve body or a plurality of valve bodies, the units have the same structure and the same function, and the units with different numbers can form the regulating valve with different functions.
The invention further adopts the technical scheme for solving the technical problems that: the valve core consists of a connecting part and a functional part, and is positioned on the corresponding valve sleeve through the check ring; the connecting part is connected with the corresponding motor through a connecting key, and the middle part of the functional part is provided with a group of two radial through holes.
The invention further adopts the technical scheme for solving the technical problems that: the retainer ring is used to define the position of the valve core relative to the valve sleeve.
The invention further adopts the technical scheme for solving the technical problems that: the cover shoulder of valve barrel has fixed a position the valve barrel with the relative position of valve body, the cover shoulder passes through the adapter sleeve to be connected with the motor, the valve barrel is equipped with: two radial through holes, two radial annular grooves and four axial grooves, wherein the radial through holes are respectively communicated with the radial annular grooves through the adjacent axial grooves.
The invention further adopts the technical scheme for solving the technical problems that: the connecting sleeve is used for connecting the motor and the disc.
The invention further adopts the technical scheme for solving the technical problems that: the connecting key is used for connecting the motor shaft and the connecting part.
The invention further adopts the technical scheme for solving the technical problems that: the motor is a servo motor or a stepping motor.
The invention further adopts the technical scheme for solving the technical problems that: the valve body is provided with four valve holes which penetrate through the front and the back of the valve body; the valve body is provided with four openings: the air inlet comprises a P port, a T port, an A port and a B port; the four units are respectively installed in the four valve holes.
By adopting the technical scheme, the invention has the following beneficial effects:
1. each throttling orifice of the same valve has different control modes such as independent control, synchronous control and the like, so that load matching can be realized, and the energy-saving effect is achieved;
2. the valve has simple and compact structure, simplified loop and integration;
3. the processing is simple, pollution resistance, interference resistance and high reliability are achieved;
4. the same valve can realize different functions, and one valve has multiple functions (can be used as a pressure, flow and direction control valve).
5. Linear and non-linear adjustment modes can be realized by changing control software according to the use requirement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a schematic of one configuration of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a sectional view taken along line A-A of FIG. 1;
FIG. 5 is a sectional view taken along line B-B of FIG. 1;
FIG. 6 is a sectional view taken along line C-C of FIG. 1;
FIG. 7 is a sectional view taken along line D-D of FIG. 1;
FIG. 8 is a sectional view taken along line E-E in FIG. 2;
FIG. 9 is a sectional view taken along line F-F in FIG. 3;
FIG. 10 is a sectional view taken along line G-G of FIG. 4;
FIG. 11 is a sectional view taken along line H-H in FIG. 5;
the figures are numbered specifically as follows:
1. 2, 3, 4, unit; 11. 21, 31, 41, a valve core; 12. 22, 32, 42, retaining ring; 13. 23, 33, 43, valve housing; 14. 24, 34, 44, connecting sleeves; 15. 25, 35, 45, connecting key; 16. 26, 36, 46, motor;
111. 112, 133, 136, 211, 212, 233, 236, 311, 312, 333, 336, 411, 412, 433, 436, radial through holes;
131. 132, 231, 232, 331, 332, 431, 432, an annular groove;
134. 135, 137, 138, 234, 235, 237, 238, 334, 335, 337, 338, 434, 435, 437, 438, axial slots;
5. a valve body; 51. 52, 53, 54, valve bore; 55. a P port; 56. t port; 57. a, a through opening; 58. and B, a port.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A multi-motor direct-drive multi-valve-core multifunctional rotary hydraulic regulating valve is shown in the attached drawings 1-11 and comprises a unit 1, a unit 2, a unit 3, a unit 4 and a valve body 5, wherein the units are identical in structure and function;
the unit 1 comprises a valve core 11, a retainer ring 12, a valve sleeve 13, a connecting sleeve 14, a connecting key 15 and a motor 16; the units 2, 3 and 4 have the same structure as the unit 1;
the connecting ends of the valve cores 11 are connected with the corresponding motors 16 through connecting keys 15, and the valve cores 11 are provided with a group of two radial through holes; the valve cores 21, 31 and 41 have the same structure and function as the valve core 11;
the retainer ring 12 is used for limiting the position of the valve core 11 relative to the valve sleeve 13, and the retainer rings 22, 32 and 32 have the same functions as the retainer ring 12;
the sleeve shoulder of valve barrel 13 passes through adapter sleeve 14 and is connected with motor 16, valve barrel 13 is equipped with: two radial through holes 133 and 136, two radial annular grooves 131 and 132, and four axial grooves 134, 135, 137, and 138. The radial through hole is communicated with the radial annular groove through the axial groove. The valve housings 23, 33, 43 are of the same construction as the valve housing 13.
The connecting sleeve 14 is used for connecting the motor 16 and a sleeve shoulder of the valve sleeve 13, and the connecting sleeves 24, 34, 44 have the same function as the connecting sleeve 14.
The connecting key 15 is used for connecting the shaft of the motor 16 and the connecting part 111, and the connecting keys 25, 35 and 45 have the same functions as the connecting key 15.
The motors 16, 26, 36 and 46 are provided with angular displacement sensors for monitoring the angle of rotation of the motors.
Four valve holes 51, 52, 53 and 54 are arranged on the valve body 5, all the valve holes penetrate through the front and the back of the valve body 5, and four through openings are additionally arranged on the valve body 5: a P port 55, a T port 56, an a port 57 and a B port 58, the P port 55, T port 56, a port 57 and B port 58 communicating with respective annular grooves in the four components through passages in the valve body 5; the four components are respectively installed in the four valve holes.
In order to achieve precise control of the valve spools 11, 21, 31 and 41, the motors 16, 26, 36 and 46 are preferably servo motors or stepper motors.
The principle of the unit 1 is that when a pulse signal is given to a motor 16 with an angular displacement sensor, the motor 16 drives the valve core 11 to rotate for a certain angle, the radial through holes 111 and 136 are communicated, the radial through holes 112 and 133 are communicated, the radial through holes 111 and 136 are communicated with the annular groove 132 through the axial grooves 137 and 138, the radial through holes 112 and 133 are communicated with the annular groove 131 through the axial grooves 134 and 135, the annular groove 131 is communicated with the port P (or port T), and the annular groove 132 is communicated with the port A (or port B); when the valve needs to be disconnected, a pulse signal is continuously sent to the motor, the motor 16 drives the valve core 11 to rotate for a certain angle, the radial through holes 111 and 136 are disconnected, and the radial through holes 112 and 133 are disconnected; the pulse signal is changed, that is, the angle of the valve core 11 driven by the motor 16 can be changed, and the relative position of the connection between the radial through hole on the valve core 11 and the radial through hole on the valve sleeve 13 can be changed, that is, the opening degree of the valve port is changed, so that the flow control of the digital valve is realized. The control principle of the units 2, 3, 4 is the same as that of the unit 1.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A multi-motor direct-drive multi-valve-core multifunctional rotary hydraulic regulating valve is characterized by comprising a plurality of units and a valve body or a plurality of valve bodies, wherein the units have the same structure and the same function, and the regulating valves with different functions can be formed by the units with different numbers;
the unit consists of a valve core, a retainer ring, a valve sleeve, a connecting key and a motor;
the connecting ends of the valve cores are connected with the corresponding motors through connecting keys, and the valve cores are provided with a group of two radial through holes;
the retainer ring is used for limiting the position of the valve core relative to the valve sleeve;
the valve barrel has the cover shoulder, the cover shoulder of valve barrel has fixed a position the valve barrel with the relative position of valve, the cover shoulder passes through the adapter sleeve and is connected with the motor, the valve barrel is equipped with: the radial through holes are respectively communicated with the radial annular grooves through the adjacent axial grooves;
the connecting sleeve is used for connecting the motor and the sleeve shoulder of the valve sleeve;
the connecting key is used for connecting the motor shaft and the valve core connecting end;
the motor is provided with an angular displacement sensor and is used for monitoring the rotating angle of the motor;
the valve body is provided with four valve holes which penetrate through the front and the back of the valve body; the valve body is provided with four openings: port P, port T, port A and port B.
2. A multi-motor direct-drive multi-spool multifunctional rotary hydraulic regulating valve according to claim 1, wherein the regulating valve comprises a plurality of units and a valve body or a plurality of valve bodies, the units have the same structure and the same function, and the units with different numbers can constitute regulating valves with different functions.
3. A multi-motor direct-drive multi-spool multifunctional rotary hydraulic regulating valve according to claim 1, wherein the connecting ends of the spools are connected with the corresponding motors through connecting keys, and the spools are provided with a set of two radial through holes.
4. A multi-motor direct drive multi-spool multi-function rotary hydraulic regulator valve according to claim 1 wherein said retainer ring is adapted to define the position of said spool relative to said valve housing;
5. a multi-motor direct drive multi-spool multifunctional rotary hydraulic regulating valve according to claim 1, wherein a sleeve shoulder of said valve sleeve positions a relative position of said valve sleeve and said valve body, said sleeve shoulder being connected to the motor through a connecting sleeve, said valve sleeve being provided with: two radial through holes, two radial annular grooves and four axial grooves, wherein the radial through holes are respectively communicated with the radial annular grooves through the adjacent axial grooves.
6. The multi-motor direct drive multi-spool multi-function rotary hydraulic regulator valve of claim 1, wherein the connection sleeve is adapted to connect the motor to the valve sleeve shoulder.
7. The multi-motor direct drive multi-spool multifunctional rotary hydraulic regulator valve according to claim 1, wherein said connection key is used to connect said motor shaft and said spool connection end.
8. The multi-motor direct-drive multi-spool multifunctional rotary hydraulic regulating valve according to claim 1, wherein the motor is a servo motor or a stepper motor.
9. The multi-motor direct-drive multi-spool multifunctional rotary hydraulic regulating valve according to claim 1, wherein the valve body is provided with four valve holes, and the valve holes penetrate through the front and back of the valve block; the valve body is provided with four openings: the air inlet comprises a P port, a T port, an A port and a B port; the four units are respectively installed in the four valve holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421966.7A CN111219373A (en) | 2018-11-27 | 2018-11-27 | Multi-motor direct-drive multi-valve-element multifunctional rotary hydraulic regulating valve |
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| CN201811421966.7A CN111219373A (en) | 2018-11-27 | 2018-11-27 | Multi-motor direct-drive multi-valve-element multifunctional rotary hydraulic regulating valve |
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| CN111219373A true CN111219373A (en) | 2020-06-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112984167A (en) * | 2021-04-02 | 2021-06-18 | 燕山大学 | Device capable of realizing multi-working-condition switching of fluid |
| CN113446278A (en) * | 2021-06-28 | 2021-09-28 | 于化杰 | Hydraulic reversing valve |
| CN114645692A (en) * | 2022-05-23 | 2022-06-21 | 德州联合石油科技股份有限公司 | Wellhead Christmas tree throttle valve core and throttle valve |
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| CN112984167A (en) * | 2021-04-02 | 2021-06-18 | 燕山大学 | Device capable of realizing multi-working-condition switching of fluid |
| CN113446278A (en) * | 2021-06-28 | 2021-09-28 | 于化杰 | Hydraulic reversing valve |
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