CN114046283B - Digital flow valve - Google Patents
Digital flow valve Download PDFInfo
- Publication number
- CN114046283B CN114046283B CN202111223031.XA CN202111223031A CN114046283B CN 114046283 B CN114046283 B CN 114046283B CN 202111223031 A CN202111223031 A CN 202111223031A CN 114046283 B CN114046283 B CN 114046283B
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- Prior art keywords
- valve
- channel
- throttle valve
- valve core
- pressure reducing
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- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 12
- 230000004044 response Effects 0.000 abstract description 4
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention proposes a digital flow valve comprising: a throttle valve part, which is provided with a throttle valve core, wherein the sealing surface of the throttle valve core is a first conical surface, an inlet channel and an outlet channel which are intersected are arranged in the throttle valve part, and a second conical surface which is adaptive to the first conical surface is arranged on the inlet channel; and a pressure reducing valve portion coupled to the throttle valve portion. The digital flow valve of the invention has the advantages of small movement stroke and high response speed of the throttle valve core through the cone valve type valve ports of the first cone surface and the second cone surface. In addition, the valve core position of the cone valve type valve port has good linear correlation with the flow, and is convenient for accurately controlling the flow.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a digital flow valve.
Background
The flow valve is a valve for controlling the flow of the throttle orifice by changing the liquid resistance of the throttle orifice under a certain pressure difference, thereby adjusting the movement speed of an executive element (a hydraulic cylinder or a hydraulic motor). The flow valve has the function of regulating the flow by utilizing the throttling port area between the regulating valve core and the valve body and the local resistance generated by the regulating valve core under the condition of changing the inlet and outlet pressure difference of the valve, thereby controlling the movement speed of the executing element.
In the prior art, publication number 2727470Y discloses a digital flow valve, referring to fig. 3, the upper part of the digital flow valve is a throttle valve part for controlling the flow; the lower part is a pressure reducing valve part for controlling the pressure difference between the inlet and the outlet of the throttle valve part. When in operation, the rotational motion of the stepper motor 31 is converted to linear motion by the lead screw 32 and nut 33, adjusting the displacement of the throttle valve core 34, thereby controlling the flow therethrough. In carrying out the invention, the inventors have found that at least the following problems exist in the prior art: 1. the following problems are encountered in using a cylindrical spool valve structure for the valve port of the throttle valve portion: the linear correlation between the valve core position and the flow is poor, and the flow precision control difficulty is high; the valve core has large movement stroke and slow action response. 2. The throttle valve part is controlled by a common stepping motor. The throttle valve part needs to convert the rotary motion of a common stepping motor into the linear motion of the valve core, has a complex structure and influences the control precision. 3. The working height of the spring of the pressure reducing valve part is fixed and cannot be adjusted, so that the digital flow valve can only work in a fixed flow interval. Can not adapt to different working conditions.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, a first object of the present invention is to provide a digital flow valve with high control accuracy.
A second object of the invention is to propose a hydraulic system.
To achieve the above object, a digital flow valve according to a first aspect of the present invention includes:
a throttle valve part, which is provided with a throttle valve core, wherein the sealing surface of the throttle valve core is a first conical surface, an inlet channel and an outlet channel which are intersected are arranged in the throttle valve part, and a second conical surface which is adaptive to the first conical surface is arranged on the inlet channel;
and a pressure reducing valve portion coupled to the throttle valve portion.
The digital flow valve of the invention has the advantages of small movement stroke and high response speed of the throttle valve core through the cone valve type valve ports of the first cone surface and the second cone surface. In addition, the valve core position of the cone valve type valve port has good linear correlation with the flow, and is convenient for accurately controlling the flow.
According to a first embodiment of the present invention, the throttle valve portion includes a linear stepping motor, an output shaft of the linear stepping motor is fixed to the throttle valve core, and the throttle valve core moves synchronously with expansion and contraction of the output shaft of the linear stepping motor.
According to a first embodiment of the present invention, the throttle valve portion further includes:
a lower valve body;
the intermediate body is arranged above the lower valve body and is connected with the lower valve body in a sealing way;
the upper valve body is arranged above the intermediate body and is connected with the intermediate body in a sealing way;
the linear stepping motor is arranged above the upper valve body and is fixedly connected with the upper valve body;
the pressure reducing valve part is connected with the side face of the lower valve body.
According to the first embodiment of the invention, the first channel and the balance cavity are arranged in the throttle valve core, the balance cavity is communicated with the first channel, and the balance cavity is used for enabling hydraulic liquid in the balance cavity to generate thrust to the throttle valve core so as to offset the thrust generated by the hydraulic liquid in the inlet channel to the throttle valve core.
According to a first embodiment of the present invention, the pressure reducing valve portion includes:
a pressure reducing valve core installed in the throttle valve part and intersecting the inlet passage, the middle part of the pressure reducing valve core having a groove for adjusting the flow range of the hydraulic fluid;
the throttle valve part is fixedly connected with the mounting seat, and a transmission channel is formed in the middle of the mounting seat;
the mounting cover is fixed at the other end of the mounting seat;
the adjusting part is arranged in the middle of the mounting cover and is in threaded connection with the mounting cover;
the top seat is arranged in the transmission channel, and one end of the top seat is contacted with the adjusting part;
the elastic body is arranged in the transmission channel, and one end of the elastic body is contacted with the top seat;
and the base is arranged in the transmission channel, one end of the base is contacted with the elastomer, and the other end of the base is contacted with the pressure reducing valve core.
According to a first embodiment of the invention, the balancing chamber comprises a cross-shaped channel in one plane.
According to a first embodiment of the invention, the inlet passage and the outlet passage are provided in the lower valve body, which also has therein:
a second passage, one end of which is communicated with the side surface of the lower valve body, and the other end of which is communicated with the side surface of the inlet passage;
the top end of the third channel is communicated with the side surface of the second channel, the bottom end of the third channel is communicated with the bottom end of the lower valve body, and an opening for the pressure reducing valve core to enter is formed in the side surface of the third channel;
and the top end of the fourth channel is communicated with the outlet channel, the bottom end of the fourth channel is communicated with the bottom end of the lower valve body, and an opening for the base to enter is formed in the side surface of the fourth channel.
According to the first embodiment of the invention, the output shaft of the linear stepping motor is fixed with the throttle valve core through threads.
According to the first embodiment of the invention, sealing rings are arranged on two sides of the pressure reducing valve core, and the sealing rings are arranged on one side, close to the top seat, of the mounting cover.
In a second aspect, there is provided a hydraulic system comprising:
the digital flow valve of any of the above embodiments;
a hydraulic pump, an outlet of which is connected to the inlet passage;
the oil inlet of the reversing valve is connected with the outlet channel;
the oil port of the hydraulic cylinder is connected with the oil outlet of the reversing valve;
the liquid tank is connected with an oil return port of the reversing valve;
and the inlet of the overflow valve is connected with the outlet of the hydraulic pump, and the outlet of the overflow valve is connected with the liquid tank.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic diagram of a digital flow valve according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a hydraulic system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a prior art digital flow valve.
Reference numerals illustrate:
the valve comprises a lower valve body 1, an intermediate body 2, a throttle valve core 3, an upper valve body 4, a linear stepping motor 5, a pressure reducing valve core 6, a base 7, an elastic body 8, a mounting seat 9, a top seat 10, a mounting cover 11, an adjusting part 12, a balance cavity 13, a first channel 14, an outlet channel 15, an inlet channel 16, a second channel 17, a third channel 18, a fourth channel 20, a liquid tank 21, a motor 22, a hydraulic pump 23, an overflow valve 24, a reversing valve 25, a hydraulic cylinder 26, a stepping motor 31, a lead screw 32, a nut 33, a throttle valve core 34, a pressure reducing valve 35 and an angle sensor 36.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. On the contrary, the embodiments of the invention include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
Fig. 1 is a schematic diagram of a digital flow valve according to an embodiment of the present invention.
Referring to fig. 1, the digital flow valve provided in the first aspect of the present embodiment includes a throttle valve portion and a pressure reducing valve portion. The throttle valve part is provided with a throttle valve core 3, the sealing surface of the throttle valve core 3 is a first conical surface, an inlet channel 16 and an outlet channel 15 which are intersected are arranged in the throttle valve part, and a second conical surface which is matched with the first conical surface is arranged on the inlet channel 19; a pressure reducing valve portion coupled to the throttle valve portion.
By changing the gap between the first conical surface and the second conical surface, the oil passage can be turned on and off. When the first conical surface and the second conical surface are tightly contacted under the action of certain pressure, the throttle valve part is in a closed state; when a gap exists between the first conical surface and the second conical surface, the oil path is opened.
It should be noted that, the gap between the first conical surface and the second conical surface may be adaptively set according to the actual scenario of the digital flow valve task.
According to the cone valve type valve port, the first cone surface and the second cone surface are adopted, so that the movement stroke of the throttle valve core is small, the response speed is high, and the problem that the flow accuracy is poor when the cylindrical slide valve is used for adjusting in the prior art is solved. In addition, the valve core position of the cone valve type valve port has good linear correlation with the flow, and is convenient for accurately controlling the flow.
In some embodiments, the throttle valve portion includes a linear stepper motor 5, an output shaft of the linear stepper motor 5 being fixed with the throttle valve core 3, for example, the output shaft of the linear stepper motor 5 may be screwed with the throttle valve core 3. The throttle valve core 3 moves synchronously with the expansion and contraction of the output shaft of the linear stepping motor 5. Compared with the common stepping motor in the prior art, the linear stepping motor 5 reduces parts for converting rotary motion into linear motion of the valve core, simplifies the valve core structure of the pressure reducing valve, and further improves the flow control precision.
Specifically, in some embodiments, the throttle valve portion further includes a lower valve body 1, an intermediate body 2, and an upper valve body 4. The middle body 2 is arranged above the lower valve body 1 and is connected with the lower valve body 1 in a sealing way; the upper valve body 4 is arranged above the intermediate body 2 and is connected with the intermediate body 2 in a sealing way; the linear stepping motor 5 is arranged above the upper valve body 4 and fixedly connected with the upper valve body 4; the pressure reducing valve portion is coupled to a side surface of the lower valve body 1. The relief valve portion may be coupled to other surfaces of the lower valve body 1, but the internal structure needs to be adapted.
Specifically, the first channel 14 and the balance cavity 13 are disposed inside the throttle valve core 3, the balance cavity 13 is communicated with the first channel 14, and the balance cavity 13 is used for enabling hydraulic fluid in the balance cavity 13 to generate thrust to the throttle valve core 3, and counteracting the thrust generated by the hydraulic fluid in the inlet channel 16 to the throttle valve core 3. For example, the balancing chamber 13 comprises a cross-shaped channel in one plane, the four outlets of which are in contact with the central body 2.
In some embodiments, the pressure relief valve portion includes pressure relief valve core 6, base 7, elastomer 8, mount 9, footstock 10, mounting cover 11, and adjustment portion 12: wherein, the pressure reducing valve core 6 is installed in the throttle valve part and intersected with the inlet channel 16, the pressure reducing valve core adopts a slide valve structure, and the middle part of the pressure reducing valve core 6 is provided with a groove for adjusting the flow range of hydraulic fluid; the installation seat 9, one end of the installation seat 9 is fixedly connected with the throttle valve part, and the middle part of the installation seat 9 is provided with a transmission channel; a mounting cover 11 fixed to the other end of the mounting base 9; an adjusting part 12 installed at the middle of the installation cover 11 and screwed with the installation cover 11; the top seat 10 is arranged in the transmission channel, and one end of the top seat 10 is contacted with the adjusting part 12; the elastic body 8 is arranged in the transmission channel, and one end of the elastic body 8 is contacted with the top seat 10; and the base 7 is arranged in the transmission channel, one end of the base 7 is contacted with the elastic body 8, and the other end of the base 7 is contacted with the pressure reducing valve core 6. Sealing rings are arranged on two sides of the pressure reducing valve core 6, and sealing rings are arranged on one side, close to the top seat 10, of the installation cover 11. By rotating the adjusting part 12, the top seat 10 can be driven to move left and right to compress or relax the elastic body 8, and then the pressure reducing valve core 6 is driven to move, so that the groove position, namely the position of a hydraulic liquid inlet and outlet channel, is changed, and the pressure difference of the inlet and outlet of the throttle valve part can be reduced. Under the working conditions of different flow intervals, the throttling valve core can be ensured to work in the interval with the best linear correlation with the flow by adjusting the pressure difference.
In order to improve the control effect on the hydraulic fluid, an inlet passage 16 and an outlet passage 15 are provided in the lower valve body 1, and the lower valve body 1 further has a second passage 17, a third passage 18 and a fourth passage 20 therein. Wherein one end of the second passage 17 communicates with the side surface of the lower valve body 1, and the other end of the second passage 17 communicates with the side surface of the inlet passage 16; the top end of the third channel 18 is communicated with the side surface of the second channel 17, the bottom end of the third channel 18 is communicated with the bottom end of the lower valve body 1, and an opening for the pressure reducing valve core 6 to enter is formed in the side surface of the third channel 18; and a fourth channel 20, wherein the top end of the fourth channel 20 is communicated with the outlet channel 15, the bottom end of the fourth channel 20 is communicated with the bottom end of the lower valve body 1, and an opening for the base 7 to enter is formed in the side surface of the fourth channel 20. When the digital flow valve is put into use, the outlets of the second channel 17, the third channel 18 and the fourth channel 20 need to be sealed in advance.
The working principle of the digital flow valve in some embodiments is explained below.
Referring to fig. 1, hydraulic fluid enters the inlet passage 16 of the present digital flow valve from port P, and is depressurized at the pressure-reducing valve element 6. Then split into 4 paths: the 1 st path is an inlet channel 16, a second channel 17 and a third channel 18; the 2 nd path is an inlet channel 16- & gt a first channel 14- & gt a balance cavity 13; the 3 rd path is an inlet channel 16- & gt an outlet channel 15; the 4 th path is the outlet channel 15 to the fourth channel 20. The 3 rd path is a main working channel, and the other 3 paths are functional channels.
Effect of path 1: the hydraulic fluid in the balance cavity generates downward thrust to the throttle valve core 3, and counteracts upward thrust generated by the hydraulic fluid in the inlet channel 16 to the throttle valve core 3;
effect of way 2 and way 4: the hydraulic fluid in the third channel 18 dynamically balances the rightward thrust of the pressure reducing valve core 6 and the leftward thrust of the hydraulic fluid in the fourth channel 20 on the pressure reducing valve core 6, and the pressure difference of the inlet and the outlet of the throttle valve part, namely the first channel 14, is controlled to be always equal to the thrust of the elastomer/the stress area of the pressure reducing valve core. Stress of the pressure reducing valve core 6: left = pressure of first channel hydraulic fluid x relief spool force area; right = elastomer thrust + pressure of outlet channel hydraulic fluid x relief valve core force area. When the left thrust force received by the pressure reducing valve core 6 is greater than the right thrust force, the pressure reducing valve core 6 moves rightward, the valve port is reduced, and the inlet pressure of the throttle valve part is reduced; when the right thrust force received by the relief valve element 6 is greater than the left thrust force, the relief valve element 6 moves leftward, increasing the valve port, and increasing the throttle inlet pressure.
Effect of path 3: when the output shaft of the linear stepping motor 5 drives the throttle valve core 3 to move downwards, the outlet of the inlet channel 16 is reduced, and the flow is reduced; when the output shaft of the linear stepping motor 5 drives the throttle valve core 3 to move upwards, the outlet of the inlet channel 16 is increased, and the flow is increased.
Referring to fig. 2, a second aspect of the embodiment of the present invention also provides a hydraulic system comprising the digital flow valve of any of the above embodiments, a tank 21, a hydraulic pump 23, a relief valve 24, a reversing valve 25 and a hydraulic cylinder 26. Wherein the outlet of the hydraulic pump 23 is connected to the inlet passage 16; the oil inlet of the reversing valve 25 is connected with the outlet channel 15; the oil port of the hydraulic cylinder 26 is connected with the oil outlet of the reversing valve 25; the liquid tank 21 is connected with an oil return port of the reversing valve 25; the inlet of the relief valve 24 is connected to the outlet of the hydraulic pump 23, and the outlet of the relief valve 24 is connected to the tank 21. The reversing valve 25 may be an electromagnetic reversing valve.
The working process of the hydraulic system is as follows: the flow rate setting range of the present digital flow rate valve can be adjusted by rotating the adjusting portion 12 before use. The motor drives the hydraulic pump 23 to suck liquid from the liquid tank 21, and the hydraulic liquid is split into two paths after flowing out from the hydraulic pump 4. One is returned to the tank 21 through the overflow valve 24, and the other is connected to the liquid inlet of the reversing valve 25 through the digital flow valve. When the reversing valve 25 is not electrified, hydraulic fluid in the lower cavity of the hydraulic cylinder 26 flows back to the fluid tank 21 through the reversing valve 25, and the hydraulic cylinder 26 withdraws the piston rod; when the directional valve 25 is energized, hydraulic fluid from the digital flow valve passes through the directional valve 5 to the lower chamber of the hydraulic cylinder 26. At this time, the rate of extension of the piston rod in hydraulic cylinder 26 may be controlled by the adjustable flow rate of the digital flow valve.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. A digital flow valve, comprising:
a throttle valve part, which is provided with a throttle valve core (3), wherein the sealing surface of the throttle valve core (3) is a first conical surface, an inlet channel (16) and an outlet channel (15) which are intersected are arranged in the throttle valve part, and a second conical surface which is matched with the first conical surface is arranged on the inlet channel (16);
a pressure reducing valve portion coupled to the throttle valve portion;
the pressure reducing valve portion includes:
a pressure reducing valve element (6) installed in the throttle valve portion to intersect the inlet passage (16), the pressure reducing valve element (6) having a groove in the middle thereof for adjusting the hydraulic fluid flow range;
the throttle valve comprises a throttle valve part, a mounting seat (9), a driving channel and a control device, wherein one end of the mounting seat (9) is fixedly connected with the throttle valve part, and the middle part of the mounting seat (9) is provided with the driving channel;
the mounting cover (11) is fixed at the other end of the mounting seat (9);
the adjusting part (12) is arranged in the middle of the mounting cover (11) and is in threaded connection with the mounting cover (11);
the top seat (10) is arranged in the transmission channel, and one end of the top seat (10) is contacted with the adjusting part (12);
the elastic body (8) is arranged in the transmission channel, and one end of the elastic body (8) is contacted with the top seat (10);
the base (7) is arranged in the transmission channel, one end of the base (7) is contacted with the elastic body (8), and the other end of the base (7) is contacted with the pressure reducing valve core (6);
sealing rings are arranged on two sides of the pressure reducing valve core (6), and a sealing ring is arranged on one side, close to the top seat (10), of the mounting cover (11);
the throttle valve part also comprises a lower valve body (1);
the inlet channel (16) and the outlet channel (15) are arranged in the lower valve body (1), and the lower valve body (1) is also provided with:
a second passage (17), one end of the second passage (17) is communicated with the side surface of the lower valve body (1), and the other end of the second passage (17) is communicated with the side surface of the inlet passage (16);
the top end of the third channel (18) is communicated with the side surface of the second channel (17), the bottom end of the third channel (18) is communicated with the bottom end of the lower valve body (1), and an opening for the pressure reducing valve core (6) to enter is formed in the side surface of the third channel (18);
and the top end of the fourth channel (20) is communicated with the outlet channel (15), the bottom end of the fourth channel (20) is communicated with the bottom end of the lower valve body (1), and an opening for the base (7) to enter is formed in the side surface of the fourth channel (20).
2. A digital flow valve according to claim 1, characterized in that the throttle valve part comprises a linear stepping motor (5), an output shaft of the linear stepping motor (5) is fixed with the throttle valve core (3), and the throttle valve core (3) moves synchronously with the expansion and contraction of the output shaft of the linear stepping motor (5).
3. The digital flow valve according to claim 2, wherein said throttle valve portion further comprises:
the intermediate body (2) is arranged above the lower valve body (1) and is connected with the lower valve body (1) in a sealing way;
the upper valve body (4) is arranged above the intermediate body (2) and is connected with the intermediate body (2) in a sealing way;
the linear stepping motor (5) is arranged above the upper valve body (4) and is fixedly connected with the upper valve body (4);
the pressure reducing valve part is connected with the side surface of the lower valve body (1).
4. A digital flow valve according to claim 1, characterized in that the throttle valve core (3) is internally provided with a first channel (14) and a balance cavity (13), the balance cavity (13) is communicated with the first channel (14), and the balance cavity (13) is used for enabling hydraulic liquid in the balance cavity (13) to generate thrust to the throttle valve core (3) and counteracting the thrust generated by the hydraulic liquid in the inlet channel (16) to the throttle valve core (3).
5. A digital flow valve according to claim 4, characterized in that the balancing chamber (13) comprises a cross-shaped channel in one plane.
6. A digital flow valve according to claim 2, characterized in that the output shaft of the linear stepper motor (5) is screwed with the throttle valve core (3).
7. A hydraulic system, comprising:
a digital flow valve according to any one of claims 1 to 6;
-a hydraulic pump (23), the outlet of which hydraulic pump (23) is connected to said inlet channel (16);
a reversing valve (25), wherein an oil inlet of the reversing valve (25) is connected with the outlet channel (15);
the oil port of the hydraulic cylinder (26) is connected with the oil outlet of the reversing valve (25);
the liquid tank (21), the liquid tank (21) couples to oil return port of the reversing valve (25);
and an overflow valve (24), wherein the inlet of the overflow valve (24) is connected with the outlet of the hydraulic pump (23), and the outlet of the overflow valve (24) is connected with the liquid tank (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223031.XA CN114046283B (en) | 2021-10-20 | 2021-10-20 | Digital flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223031.XA CN114046283B (en) | 2021-10-20 | 2021-10-20 | Digital flow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114046283A CN114046283A (en) | 2022-02-15 |
| CN114046283B true CN114046283B (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111223031.XA Active CN114046283B (en) | 2021-10-20 | 2021-10-20 | Digital flow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114046283B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000043743A (en) * | 1998-07-27 | 2000-02-15 | Toyoda Mach Works Ltd | Flow rate control device |
| CN2727470Y (en) * | 2004-08-09 | 2005-09-21 | 中国航天科技集团公司第一研究院第十五研究所 | Digital flow valve |
| CN101799025A (en) * | 2009-05-15 | 2010-08-11 | 武汉科技学院 | Internal feedback type incremental hydraulic throttling digital valve |
| CN111677719A (en) * | 2020-06-18 | 2020-09-18 | 北京天地玛珂电液控制系统有限公司 | Automatic test system and method for electromagnetic directional valve |
-
2021
- 2021-10-20 CN CN202111223031.XA patent/CN114046283B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000043743A (en) * | 1998-07-27 | 2000-02-15 | Toyoda Mach Works Ltd | Flow rate control device |
| CN2727470Y (en) * | 2004-08-09 | 2005-09-21 | 中国航天科技集团公司第一研究院第十五研究所 | Digital flow valve |
| CN101799025A (en) * | 2009-05-15 | 2010-08-11 | 武汉科技学院 | Internal feedback type incremental hydraulic throttling digital valve |
| CN111677719A (en) * | 2020-06-18 | 2020-09-18 | 北京天地玛珂电液控制系统有限公司 | Automatic test system and method for electromagnetic directional valve |
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| Publication number | Publication date |
|---|---|
| CN114046283A (en) | 2022-02-15 |
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