CN113048285A - Regulating valve opening degree detection device, detection structure and detection method - Google Patents
Regulating valve opening degree detection device, detection structure and detection method Download PDFInfo
- Publication number
- CN113048285A CN113048285A CN202110160908.9A CN202110160908A CN113048285A CN 113048285 A CN113048285 A CN 113048285A CN 202110160908 A CN202110160908 A CN 202110160908A CN 113048285 A CN113048285 A CN 113048285A
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- regulating valve
- grating
- opening degree
- code disc
- shell
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 77
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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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
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
Abstract
The invention discloses a detection device, a detection structure and a detection method for the opening degree of an adjusting valve, wherein the detection device comprises a shell, a grating code disc and a PCB encoder, wherein the grating code disc and the PCB encoder are arranged in the shell, the shell and the PCB encoder are provided with first through holes which are rotatably matched with a transmission shaft of the adjusting valve, and the grating code disc is provided with a first connecting hole which is non-rotatably connected with the transmission shaft of the adjusting valve; a grating area is arranged along the circumferential direction of the outer edge of the grating code disc; a light hole is formed in the top of the shell and corresponds to the grating area; the PCB encoder comprises a wharf and a controller, wherein the wharf is arranged corresponding to the light-transmitting hole and the grating area and is used for converting the rotation angle of the grating code disc into a pulse signal and sending the pulse signal to the controller; the controller is used for calculating the opening of the regulating valve according to the pulse signal; this application simple structure detects the precision height.
Description
Technical Field
The invention relates to the technical field of valve opening detection, in particular to a device for detecting the opening of an adjusting valve.
Background
A regulating valve is also called a control valve, and in the field of industrial automation control, process parameters such as medium flow, pressure, temperature, liquid level and the like are changed by means of power operation according to a control signal output by a control unit, and the regulating valve plays a vital role in the field of fluid control. In the control process, the upper computer needs to acquire the opening data of the regulating valve in real time, and the regulating valve has linear motion up and down and angular motion during regulating operation, so that certain difficulty is brought to the opening detection of the regulating valve. In the prior art, a Hall sensor or a photoelectric sensor is mainly adopted for detecting the opening degree of the regulating valve, and the detection precision is low.
The method comprises the steps of presetting a position sensor, connecting the position sensor with a regulating valve through a proportional arm, obtaining a sampling value of the position sensor, and searching a first query value r corresponding to a current sampling value, a second query value a corresponding to a pre-detected first sampling value and a third query value b corresponding to a pre-detected second sampling value from a pre-stored query table; the first sampling value is the sampling value of the position sensor when the opening of the regulating valve is maximum; the second sampling value is the sampling value of the position sensor when the opening of the regulating valve is minimum; substituting r, a and b into an opening calculation formula of the regulating valve, and calculating the opening of the regulating valve; the method calculates the opening degree of the regulating valve through the position proportion, and the detection precision is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a regulating valve opening degree detection device with high detection precision.
Further, this application still provides a governing valve aperture and detects structure.
Further, the application also provides a method for detecting the opening of the regulating valve.
The technical scheme adopted by the invention is as follows:
a regulating valve opening degree detection device comprises a shell, a grating code disc and a PCB encoder, wherein the grating code disc and the PCB encoder are arranged in the shell, first through holes which are in rotatable fit with a transmission shaft of a regulating valve are formed in the shell and the PCB encoder, and first connecting holes which are in non-rotatable connection with the transmission shaft of the regulating valve are formed in the grating code disc; a grating area is arranged along the circumferential direction of the outer edge of the grating code disc; a light hole is formed in the top of the shell and corresponds to the grating area; the PCB encoder comprises a wharf and a controller, wherein the wharf is arranged corresponding to the light-transmitting hole and the grating area and is used for converting the rotation angle of the grating code disc into a pulse signal and sending the pulse signal to the controller; the controller is used for calculating the opening of the regulating valve according to the pulse signal.
The limiting device is arranged in the shell and positioned between the grating code disc and the PCB encoder, and a second through hole which is in rotatable fit with the regulating valve is formed in the limiting device; the upper side of the limiter is provided with a limiting groove, and the grating code disc is arranged in the limiting groove; and a gap is arranged on the limiter and corresponds to the grating area, and the wharf passes through the gap and corresponds to the grating area.
The adjusting valve further comprises two guide pieces, the two guide pieces are symmetrically arranged in the shell, and one side, opposite to the two guide pieces, of each guide piece is provided with a guide part matched with the guide column of the adjusting valve.
The adjusting valve is characterized by further comprising a gasket, the gasket is arranged between the grating code disc and the limiting device, the outer diameter of the gasket is smaller than the aperture of the second through hole, and a second connecting hole which is connected with the adjusting valve in a non-rotatable mode is formed in the gasket.
Furthermore, a plurality of grating holes are formed in the circumferential direction of the grating area.
Further, the application provides a governing valve aperture detection structure, including the governing valve main part, this governing valve main part is last to have the transmission shaft; still include regulating valve opening detection device, this detection device adopts foretell detection device, shell and PCB encoder pass through the rotatable cover of first through-hole and establish on the transmission shaft, the grating code wheel is installed through first connecting hole unrotatably on the transmission shaft.
Further, the application provides a regulating valve opening degree detection method, adopts foretell regulating valve opening degree detection structure, includes the following step:
and starting the regulating valve, opening the opening of the regulating valve from 0% to 100%, and detecting and recording the total pulse number A of the opening of the regulating valve from 0% to 100% through the PCB encoder.
And rotating the regulating valve to any opening degree, and detecting and recording the real-time pulse number a of the regulating valve through the PCB encoder.
And the PCB encoder calculates the real-time opening of the regulating valve according to the total pulse number A and the real-time pulse number a.
Additional aspects and advantages of the present application 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 present application.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a sectional view of a regulator valve opening degree detection device according to embodiment 1 of the present application;
fig. 2 is a schematic structural diagram of a regulating valve opening degree detection device provided in embodiment 1 of the present application;
fig. 3 is a top view of a regulating valve opening degree detecting device provided in embodiment 1 of the present application;
FIG. 4 is a schematic structural diagram of a grating code wheel provided in embodiment 1 of the present application;
fig. 5 is a schematic structural view of a stopper provided in embodiment 1 of the present application;
fig. 6 is a schematic view of a structure for detecting the opening of the regulating valve according to embodiment 2 of the present application;
fig. 7 is a sectional view of a structure for detecting the opening degree of a regulating valve according to embodiment 2 of the present application.
The device comprises a shell 1, a first through hole 11, a light hole 12, a grating code disc 2, a first connecting hole 21, a grating hole 22, a gasket 3, a second connecting hole 31, a limiter 4, a second through hole 41, a limiting groove 42, a notch 43, a PCB encoder 5, a guide piece 6, a guide part 61, a transmission shaft 7 and a guide column 8.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
Referring to fig. 1 to 5, the device for detecting the opening degree of the regulating valve comprises a shell 1, a grating code wheel 2 and a PCB encoder 5, wherein the grating code wheel 2 and the PCB encoder 5 are arranged in the shell 1, a first through hole 11 which is rotatably matched with a transmission shaft 7 of the regulating valve is arranged on the shell 1 and the PCB encoder 5, and a first connecting hole 21 which is non-rotatably connected with the transmission shaft 7 of the regulating valve is arranged on the grating code wheel 2; a grating area is arranged along the circumferential direction of the outer edge of the grating code disc 2; a light hole 12 is formed in the top of the shell 1 and corresponds to the grating area; the PCB encoder 5 comprises a wharf and a controller, wherein the wharf is arranged corresponding to the light hole 12 and the grating area and is used for converting the rotation angle of the grating code disc 2 into a pulse signal and sending the pulse signal to the controller; the controller is used for calculating the opening of the regulating valve according to the pulse signal.
During the use, with detection device's shell 1, grating code wheel 2 and PCB encoder 5 cover establish on the transmission shaft 7 of governing valve, make grating code wheel 2 and the transmission shaft 7 of governing valve unrotatably be connected, shell 1 and PCB encoder 5 and the transmission shaft 7 rotatable coupling of governing valve, when the transmission shaft 7 of governing valve is rotatory regulation aperture from top to bottom, grating code wheel 2 rotates along with transmission shaft 7 is synchronous, grating code wheel 2's turned angle is unanimous with the turned angle of governing valve, PCB encoder 5 detects grating code wheel 2's turned angle and converts it into pulse signal through its pier, the controller can be accurate according to this pulse signal calculates the aperture of governing valve, moreover, the steam generator is simple in structure, it is high to detect the precision.
The shell 1 is made of PVC materials and is of a hollow cylinder structure with an opening at the lower end, the first through hole 11 is arranged at the top of the shell 1, the light hole 12 is arranged at the top of the shell 1 and corresponds to the grating area of the grating code disc 2, light is transmitted or reflected at the grating area of the grating code disc 2 through the light hole 12 to generate moire fringes, and the wharf of the PCB encoder 5 receives the moire fringes and converts the moire fringes into pulse signals related to angles.
The grating code disc 2 is made of stainless steel materials, a grating area is arranged along the circumferential direction of the outer edge of the grating code disc 2, a plurality of grating holes 22 are arranged along the circumferential direction of the grating area, the greater the number of the grating holes 22, the higher the precision is, in an exemplary embodiment, 700 grating holes 22 are arranged on the grating code disc 2, 700 pulse signals can be output every circumference, and the detection precision is high.
Preferably, the optical grating encoder further comprises a limiter 4, the limiter 4 is arranged in the shell 1 and located between the grating code disc 2 and the PCB encoder 5, and a second through hole 41 which is rotatably matched with the adjusting valve is formed in the limiter 4; the upper side of the limiter 4 is provided with a limiting groove 42, and the grating code disc 2 is arranged in the limiting groove 42; a gap 43 is arranged on the limiter 4 and corresponding to the grating area, and the wharf passes through the gap 43 and corresponds to the grating area.
This stopper 4 adopts the PVC material to make, and PCB encoder 5 and stopper 4 accessible fix with screw are at the top of shell 1, form the accommodation space that is used for holding grating code wheel 2 between spacing groove 42 and the shell 1 top inner wall, and grating code wheel 2 sets up in this accommodation space.
Preferably, the adjusting valve further comprises a gasket 3, the gasket 3 is arranged between the grating code wheel 2 and the limiting stopper 4, the outer diameter of the gasket 3 is smaller than the diameter of the second through hole 41, and the gasket 3 is provided with a second connecting hole 31 which is in non-rotatable connection with the adjusting valve.
The first through hole 11, the second through hole 41, the first connection hole 21, and the second connection hole 31 are all coaxially disposed. During installation, the gasket 3 and the grating code wheel 2 are connected with the transmission shaft 7 of the regulating valve in a non-rotatable mode, and the gasket 3 is installed on the lower side of the grating code wheel 2.
Preferably, the adjusting valve further comprises two guide members 6, the two guide members 6 are symmetrically arranged in the shell 1 at the upper ends, and a guide part 61 matched with the guide column 8 of the adjusting valve is arranged at one side opposite to the two guide members 6.
Specifically, the guide 6 is made of an alloy material, and the guide portion 61 is a U-shaped groove vertically arranged along the guide 6. During the use, the guide part 61 of guide 6 wraps up the guide post 8 of governing valve in its U type inslot, and when the transmission shaft 7 of governing valve rotated and reciprocated, detection device reciprocated along with the transmission shaft 7 of governing valve under the effect of guide 6 to by spacing and avoiding rotating of the guide post 8 of governing valve, further guarantee the accuracy of detection.
Example 2
Referring to fig. 6 and 7, in an embodiment, a regulating valve opening degree detecting structure is provided, which includes a regulating valve main body and a regulating valve opening degree detecting device, wherein the regulating valve main body has a transmission shaft 7, and guide posts 8 are symmetrically arranged on two sides of the transmission shaft 7; the detection device of embodiment 1 is adopted as the detection device of the opening degree of the regulating valve. Detection device's shell 1, grating code wheel 2, gasket 3, PCB encoder 5 and stopper 4 cover are established on transmission shaft 7, grating code wheel 2 is through first connecting hole 21 and the nonrotatable cooperation of transmission shaft 7, gasket 3 is through the nonrotatable cooperation of second connecting hole 31 and transmission shaft 7, shell 1, PCB encoder 5 and stopper 4 are respectively through first through-hole 11 and the rotatable cooperation of second through-hole 41 and transmission shaft 7, the guide part 61 and the guide post 8 guide cooperation of guide 6.
In an exemplary embodiment, the first and second through holes 11 and 41 are circular holes having a diameter larger than the diameter of the transmission shaft 7. The upper portion of transmission shaft 7 is square shaft, is equipped with the step in the bottom of square shaft, and first through-hole 11 and second through-hole 41 are the square hole with square shaft complex, and gasket 3 overlaps through second through-hole 41 cover and is established on square shaft, and its bottom is spacing by the step, and grating code wheel 2 overlaps through first through-hole 11 cover and is established on square shaft, and is located gasket 3.
Example 3
In this embodiment, a method for detecting an opening degree of a regulating valve is provided, where the method employs the structure for detecting an opening degree of a regulating valve described in embodiment 2, and includes the following steps:
and S1, before detection, starting the regulating valve, opening the regulating valve from 0% to 100%, and detecting and recording the total pulse number A of the regulating valve from 0% to 100% through the PCB encoder 5.
And S2, when detecting, rotating the regulating valve, and detecting and recording the real-time pulse number a of the regulating valve through the PCB encoder 5.
And S3, the PCB encoder 5 calculates the real-time opening of the regulating valve according to the total pulse number A and the real-time pulse number a.
For example, in an exemplary embodiment, the grating code disc 2 is provided with 700 grating holes 22, 700 pulses can be detected when the grating code disc 2 rotates with the transmission shaft 7 for one circle, the normal opening of the regulating valve is from 0% to 100%, and the grating code disc can rotate for 5-7 circles, then the opening of the regulating valve is from 0% to 100%, and 3500 and 4900 pulses can be detected, before the detection, the opening of the regulating valve is firstly opened from 0% to 100%, the total pulse number a of the opening of the regulating valve is detected, and the total pulse number a is sent to the controller. When detecting, the transmission shaft 7 of rotary regulating valve, grating code wheel 2 rotates along with transmission shaft 7, and PCB encoder 5 real-time detection and record the real-time pulse number a of governing valve, the real-time aperture of governing valve be 100% a/A, and PCB encoder 5's controller is according to this formula, the real-time aperture of the governing valve of can be convenient calculating, and it is high to detect the precision, and it is convenient to calculate.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral combinations thereof; may be an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. The device for detecting the opening degree of the adjusting valve is characterized by comprising a shell (1), a grating code disc (2) and a PCB (printed circuit board) encoder (5), wherein the grating code disc (2) and the PCB encoder (5) are arranged in the shell (1), a first through hole (11) which is rotatably matched with a transmission shaft (7) of the adjusting valve is formed in the shell (1) and the PCB encoder (5), and a first connecting hole (21) which is non-rotatably connected with the transmission shaft (7) of the adjusting valve is formed in the grating code disc (2);
a grating area is arranged along the circumferential direction of the outer edge of the grating code disc (2); a light hole (12) is formed in the top of the shell (1) and corresponds to the grating area; the PCB encoder (5) comprises a wharf and a controller, wherein the wharf is arranged corresponding to the light hole (12) and the grating area and is used for converting the rotation angle of the grating code disc (2) into a pulse signal and sending the pulse signal to the controller; the controller is used for calculating the opening of the regulating valve according to the pulse signal.
2. The device for detecting the opening degree of the regulating valve is characterized by further comprising a stopper (4), wherein the stopper (4) is arranged in the shell (1) and is positioned between the grating code disc (2) and the PCB encoder (5), and a second through hole (41) which is in rotatable fit with the regulating valve is formed in the stopper (4); a limiting groove (42) is formed in the upper side of the limiting device (4), and the grating code disc (2) is arranged in the limiting groove (42); a gap (43) is arranged on the limiter (4) and corresponding to the grating area, and the wharf passes through the gap (43) and corresponds to the grating area.
3. The device for detecting the opening degree of the regulating valve according to claim 2, characterized by further comprising two guide members (6), wherein the two guide members (6) are symmetrically arranged in the housing (1) at the upper ends of the two guide members (6), and a guide part (61) matched with the guide post (8) of the regulating valve is arranged at the opposite side of the two guide members (6).
4. The opening degree detection device of the regulating valve according to claim 3, further comprising a gasket (3), wherein the gasket (3) is arranged between the grating code disc (2) and the stopper (4), the outer diameter of the gasket (3) is smaller than the aperture of the second through hole (41), and a second connecting hole (31) which is non-rotatably connected with the regulating valve is arranged on the gasket (3).
5. The device for detecting the opening degree of the regulating valve according to any one of claims 1 to 4, wherein a plurality of grating holes (22) are formed along the circumferential direction of the grating region.
6. A structure for detecting the opening degree of a regulating valve comprises a regulating valve main body, wherein a transmission shaft (7) is arranged on the regulating valve main body; the detection device is characterized by further comprising a detection device for the opening degree of the regulating valve, the detection device adopts the detection device as claimed in any one of claims 1-5, the shell (1) and the PCB encoder (5) are rotatably sleeved on the transmission shaft (7) through the first through hole (11), and the grating code disc (2) is non-rotatably installed on the transmission shaft (7) through the first connecting hole (21).
7. A method for detecting an opening degree of an adjustment valve, characterized by adopting the structure for detecting an opening degree of an adjustment valve according to claim 6, comprising the steps of:
starting a regulating valve, opening the opening of the regulating valve from 0% to 100%, and detecting and recording the total pulse number A of the opening of the regulating valve from 0% to 100% through the PCB encoder (5);
rotating the regulating valve to any opening degree, and detecting and recording the real-time pulse number a of the regulating valve through the PCB encoder (5);
and the PCB encoder (5) calculates the real-time opening of the regulating valve according to the total pulse number A and the real-time pulse number a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160908.9A CN113048285A (en) | 2021-02-05 | 2021-02-05 | Regulating valve opening degree detection device, detection structure and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110160908.9A CN113048285A (en) | 2021-02-05 | 2021-02-05 | Regulating valve opening degree detection device, detection structure and detection method |
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| CN113048285A true CN113048285A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110160908.9A Pending CN113048285A (en) | 2021-02-05 | 2021-02-05 | Regulating valve opening degree detection device, detection structure and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046723A (en) * | 2021-11-05 | 2022-02-15 | 大连理工大学 | Electric valve opening degree detection system based on code disc counter |
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| US20020044064A1 (en) * | 2000-05-01 | 2002-04-18 | Masanori Mogi | Valve position output apparatus |
| CN2861662Y (en) * | 2005-10-13 | 2007-01-24 | 靳兰 | :Multifunctional piston type water pump control valve |
| CN2890522Y (en) * | 2006-03-07 | 2007-04-18 | 朱恩阔 | Constant pressure type thermostable slag discharge valve |
| CN202176796U (en) * | 2011-08-19 | 2012-03-28 | 天津开利达控制技术开发有限公司 | Simple multi-angle regulating valve control device |
| CN204101060U (en) * | 2014-04-01 | 2015-01-14 | 北京通大华泉科技有限公司 | Grating encoder |
| CN207961689U (en) * | 2018-02-01 | 2018-10-12 | 广州佩迈医学科技有限公司 | A kind of intelligent electric control valve system |
| CN210952870U (en) * | 2019-12-12 | 2020-07-07 | 常州节卡智能装备有限公司 | Encoder and robot joint |
| CN211875242U (en) * | 2020-03-12 | 2020-11-06 | 乐清市意达气动元件有限公司 | Throttle solenoid valve of meticulous control flow |
| WO2021016385A1 (en) * | 2019-07-24 | 2021-01-28 | Docherty Michael | Improved endoscope valve apparatus |
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2021
- 2021-02-05 CN CN202110160908.9A patent/CN113048285A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020044064A1 (en) * | 2000-05-01 | 2002-04-18 | Masanori Mogi | Valve position output apparatus |
| CN2861662Y (en) * | 2005-10-13 | 2007-01-24 | 靳兰 | :Multifunctional piston type water pump control valve |
| CN2890522Y (en) * | 2006-03-07 | 2007-04-18 | 朱恩阔 | Constant pressure type thermostable slag discharge valve |
| CN202176796U (en) * | 2011-08-19 | 2012-03-28 | 天津开利达控制技术开发有限公司 | Simple multi-angle regulating valve control device |
| CN204101060U (en) * | 2014-04-01 | 2015-01-14 | 北京通大华泉科技有限公司 | Grating encoder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046723A (en) * | 2021-11-05 | 2022-02-15 | 大连理工大学 | Electric valve opening degree detection system based on code disc counter |
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