CN112253772A - Automatic water flow regulating device for water channel - Google Patents
Automatic water flow regulating device for water channel Download PDFInfo
- Publication number
- CN112253772A CN112253772A CN202011321558.1A CN202011321558A CN112253772A CN 112253772 A CN112253772 A CN 112253772A CN 202011321558 A CN202011321558 A CN 202011321558A CN 112253772 A CN112253772 A CN 112253772A
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- Prior art keywords
- water flow
- water
- guide plate
- flow guide
- worm
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/223—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves with a plurality of valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
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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
- F16K31/042—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves with electric means, e.g. for controlling the motor or a clutch between the valve and the motor
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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
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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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
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
Abstract
The invention relates to the technical field of water channel water quantity adjustment automation, in particular to an automatic water channel water quantity adjusting device. The invention provides an automatic water flow adjusting device for a water channel, which comprises a shell, a water flow guide plate rotatably arranged on the shell, a worm and gear mechanism for driving the water flow guide plate to rotate, a water flow sensor and a controller, wherein water flow information of water flow in the water channel is monitored in real time through the water flow sensor and fed back to the controller in real time, the controller presets a water flow control threshold corresponding to the water flow in the water channel, the water flow information is compared with the water flow control threshold, and a motor and the worm and gear mechanism are controlled to drive the water flow guide plate to rotate according to a comparison result, so that the size of the water channel formed by the water flow guide plate is controlled to realize.
Description
Technical Field
The invention relates to the technical field of water channel water quantity adjustment automation, in particular to an automatic water channel water quantity adjusting device.
Background
In current water circulation route, do not set up water yield adjusting device or water yield regulation and directly realize through the flashboard usually, to the implementation of flashboard, can't realize the automatically regulated to the water course water yield, only close the water course and open two kinds of states of water course.
However, for rainy cities such as coastal cities, the drainage function of the drainage channel for rainwater plays a decisive role in the overall drainage function of the city, the drainage channel for cities usually has the size design requirement of the drainage channel, and the drainage channel for cities cannot be changed again after being built once.
Therefore, an automatic adjusting device for different water flow discharge needs is designed to adapt to different water flows, so that the urban drainage system can play a better drainage function.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an automatic adjusting device for a water flow of a water channel, which can automatically adjust a drainage flow according to a water flow in the water channel, thereby embodying automation of water flow adjustment.
In order to achieve the above object, a first aspect of the present invention provides an automatic regulating device for a water flow of a waterway, comprising:
the water outlet device comprises a shell, a water outlet channel and a water outlet control device, wherein the shell limits the water outlet channel and comprises a body and mounting plates on two sides of the water outlet channel, and the mounting plates extend along the water flow direction;
a plurality of mounting grooves are uniformly formed in the mounting plate along the vertical direction;
the water flow guide plates limit the flow of water flow, and the water flow channels are closed after the water flow guide plates are rotatably spliced;
one end of the rotating shaft is fixedly connected with the water flow guide plate, and the other end of the rotating shaft is movably connected with the mounting groove;
a worm gear drivingly connected to the rotating shaft;
the worm is perpendicular to the worm wheel and is meshed and connected with the worm wheel;
the motor is in driving connection with the worm;
the water flow sensor is arranged on the water facing side of the shell;
the controller is connected to the water quantity sensor and is connected to the motor in a control mode;
the controller is used for receiving water flow information sensed by the water flow sensor, and the controller controls the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction according to the water flow information;
a water flow threshold value is preset in the controller, and when the water flow information is larger than the water flow threshold value, the controller controls and drives the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction to increase;
when the water flow information is smaller than the water flow threshold value, the controller controls and drives the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction to be reduced.
Preferably, the casing is a rectangular frame, the water flow guide plate is plate-shaped, and the water flow guide plate is installed in the installation groove along a horizontal direction perpendicular to the water flow direction.
Preferably, the number of the water flow guide plates is four, the four water flow guide plates are uniformly arranged in the mounting grooves, and five water flow channels are formed between the mounting plates.
Preferably, the water flow sensor is disposed at a bottom end of the housing.
Preferably, after the motor stops driving, the worm and the worm wheel are self-locked.
The invention provides an automatic water flow adjusting device for a water channel, which comprises a shell, a water flow guide plate rotatably arranged on the shell, a worm and gear mechanism for driving the water flow guide plate to rotate, a water flow sensor and a controller, wherein water flow information of water flow in the water channel is monitored in real time through the water flow sensor and fed back to the controller in real time, the controller presets a water flow control threshold corresponding to the water flow in the water channel, the water flow information is compared with the water flow control threshold, and a motor and the worm and gear mechanism are controlled to drive the water flow guide plate to rotate according to a comparison result, so that the size of the water channel formed by the water flow guide plate is controlled to realize.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view showing an overall structure of an automatic regulating apparatus for a quantity of water in a waterway according to an embodiment of the present invention;
fig. 2 is a side view of an automatic regulating device for the amount of water in a waterway in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural view of a housing in the automatic regulating device for the amount of water in a waterway in accordance with one embodiment of the present invention;
fig. 4 is a schematic view illustrating a connection structure of a water quantity guide plate and a rotation shaft in the automatic adjusting device for a quantity of water in a waterway according to an embodiment of the present invention.
Reference numerals:
a housing 1010;
a body 1111;
a mounting plate 1212;
a mounting groove 121121;
a water flow deflector 2020;
a motor 3030;
a worm 3131;
a worm gear 3232;
a water flow sensor 4040;
a controller 4141;
the axis of rotation 5050.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
An automatic regulating apparatus for a quantity of a waterway according to an embodiment of the present invention will be described with reference to fig. 1 to 4.
As shown in fig. 1, the automatic adjusting device for the amount of water in a waterway according to the embodiment of the present invention includes a housing 10, a water amount deflector 20 installed on the housing 10, and a driving device for driving the water amount deflector 20 to rotate.
The shape of the shell 10 is matched with the shape of the water channel, the shell is mounted in the water channel, the shell 10 limits the water outlet channel, the shell 10 comprises a body 11 and mounting plates 12 on two sides of the water outlet channel, the mounting plates 12 extend along the water flow direction, namely the mounting plates 12 extend out of a certain length along the water flow direction, and the extending length part limits the flowing path of the water channel.
As shown in fig. 3, specifically, a plurality of mounting grooves 121 are uniformly arranged on the mounting plate 12 in the vertical direction, and the mounting grooves 121 are openings formed in the extending direction of the mounting plate 12, wherein the openings are formed by communicating a circular hole and a rectangular hole, and the width of the rectangular hole is smaller than the diameter of the circular hole.
Wherein, including a plurality of water yield guide plates 20, it is a plurality of the flow of rivers is injectd between the water yield guide plate 20, the area of guide plate should have certain area, guarantees to have certain water conservancy diversion effect to rivers, and the rotatory closed exhalant canal back of a plurality of guide plates seals the rivers passageway completely.
As shown in fig. 4, the rotation shaft 50 is connected to both sides of the water quantity flow guide plate 20, specifically, one end of the rotation shaft 50 on one side of the water quantity flow guide plate 20 is fixedly connected to the water quantity flow guide plate 20, and the other end is movably connected to the mounting groove 121, that is, the rotation shaft 50 goes in and out of the circular hole in the mounting groove 121, and the rotation shaft 50 is in clearance fit with the circular hole to realize the rotation of the rotation shaft 50 in the circular hole.
As shown in fig. 2, the driving means includes a worm wheel 32, a worm 31 and a motor 30.
Specifically, the worm wheel 32 is drivingly connected to the rotating shaft 50, and in particular, when the worm wheel 32 is connected to the rotating shaft 50, the inner hole of the worm wheel 32 may be formed by a key connection, that is, the inner hole of the worm wheel 32 has a key hole, and the position of the rotating shaft 50 corresponding to the key hole is provided with a key pin.
The worm 31 is perpendicular to the worm wheel 32, is meshed with the worm wheel 32, and the worm wheel 32 are meshed to form a power transmission mechanism.
The motor 30 is connected with the worm 31 in a driving mode, so that meshing power is provided for the worm wheel 32 and the worm 31, the motor 30 can realize speed conversion of the motor 30 through the worm wheel 32 and the worm 31 meshing mechanism due to the fact that the rotating speed formed by the motor 30 is large, the rotating speed required by the water flow guide plate 20 during normal rotation is small, and the torque is required to be large, so that the worm wheel 32 and the worm 31 meshing mechanism can realize speed reduction transmission of the motor 30, and the worm wheel 32 is guaranteed to have large torque.
In order to realize the automatic adjustment of the water quantity of the water channel, the water flow sensor 40 is further included, the water flow sensor 40 is arranged on the water facing side of the shell 10, wherein the water flow sensor 40 measures magnetic physical quantity by utilizing the Hall effect of a Hall element. A load resistor is connected in series to the positive electrode of the Hall element, and a DC voltage of 5V is applied to the load resistor to make the current direction orthogonal to the magnetic field direction. When water pushes the magnetic rotor to rotate through the turbine switch shell, a rotating magnetic field with different magnetic poles is generated, magnetic induction lines are cut, and high and low pulse levels are generated. Since the frequency of the output pulse signal of the turbine flowmeter is proportional to the rotation speed of the magnetic rotor, which is proportional to the water flow, the operating state and the operating duration of the motor 30 are started according to the water flow.
The value of the water flow rate is judged by the controller 41 due to the feedback signal of the water flow rate sensor 40. And selecting the optimal starting flow according to different water quantity adjusting requirements of the water quantity channel.
The controller 41 is configured to receive information of the water amount sensed by the water flow sensor 40, and the controller 41 controls the motor 30 to drive and adjust the angle of the water flow deflector 20 relative to the water flow direction according to the information of the water flow.
The water flow sensor 40 adopts a hall effect sensor, and the calculation of the amount of water flowing through the water flow sensor 40 and the calculation of the water flow are realized by tracking the number of pulses output by the water flow sensor 40, wherein the output of the water flow sensor 40 is pulses, and by calculating the frequency of the pulses, the volume and the flow of water flowing through the water flow sensor 40 can be calculated, and the calculation result is transmitted to the controller 41.
A water flow threshold is preset in the controller 41, when the water flow information is greater than the water flow threshold, the controller 41 controls and drives the motor 30 to drive and adjust the angle of the water flow guide plate 20 relative to the water flow direction to increase, when the water flow information detected by the water flow sensor 40 is greater than the water flow threshold in the controller 41, it is indicated that the water amount from the water channel is large, at this time, the controller 41 controls the driving motor 30 to adjust the rotation of the water flow guide plate 20, so that the angle of the water flow guide plate 20 relative to the water flow direction is increased, thereby increasing the flow of the water passing through the water flow guide plate 20, and the water flow guide plate 20 is adjusted according to the size of the water flow in the water channel.
The water flow sensor 40 monitors the water flow in the water channel in real time, when the water flow information monitored by the water flow sensor 40 is smaller than the water flow threshold value, the controller 41 controls and drives the motor 30 to drive and adjust the water flow guide plate 20 relative to the angle of the water flow direction is reduced, when the water flow information monitored by the water flow star sensor is smaller than the water flow threshold value in the controller 41, the water flow from the water channel is smaller, the controller 41 controls the driving motor 30 to adjust the water flow guide plate 20 to rotate at the moment, the angle of the water flow guide plate 20 relative to the water flow direction is reduced, the flow of the water flow guide plate 20 is reduced, the water flow guide plate 20 is adjusted according to the size of the water flow in the water channel, and therefore the water amount in.
Besides the above automatic adjustment mode according to the water quantity of the water channel, the automatic adjustment device of the water quantity of the water channel can also be directly adjusted manually, and the rotation size of the water quantity guide plate 20 can be controlled according to actual needs by inputting a control command of the driving motor 30 into the controller 41.
In a preferred embodiment of the present invention, the housing 10 is a rectangular frame, the water flow guiding plate 20 is a plate, the water flow guiding plate 20 is installed in the horizontal direction perpendicular to the water flow direction and is mounted in the installation groove 121, and for the plate-shaped water flow guiding plate 20, a plurality of water flow guiding plates 20 can be rotatably spliced to form a closed plate shape, so that a water flow channel is closed and blocked, and a fully-closed function of the water flow channel is achieved. And, the water flow guide plate 20 is installed along the horizontal direction of the vertical water flow and the installation groove 121, thereby achieving the flow regulation in the depth direction of the water flow and having more practical regulation significance to the water flow of the water channel.
In a preferred embodiment of the present invention, the number of the water quantity flow guiding plates 20 is four, and the four water quantity flow guiding plates 20 are uniformly installed in the installation groove 121, and form five water flow channels with the installation plate 12. This quantity can be specifically confirmed according to the size of the passageway of going out water to and the size of water yield guide plate 20, and this embodiment is 1 meter to the depth of water course, and the water yield guide plate 20 is limited to four in the embodiment of 25 centimetres width, and five rivers passageways are injectd to four water yield guide plates 20 to adopt less water yield guide plate 20 to reach the purpose of crossing the excellent regulation to the discharge of rivers passageway.
In order to realize the full adjustment of the depth direction of the water flow in the water channel, the water flow sensor 40 is arranged at the bottom end of the shell 10.
According to the transmission characteristics of a worm wheel 32 and a worm 31 in machinery, after the motor 30 stops driving, the worm rod and the worm wheel 32 are self-locked. The condition for self-locking in the worm gear 32 and worm 31 transmission is that the helix angle of the unwinding of the worm 31 is smaller than the friction angle of the worm gear 32 and worm 31 contact. That is, β < Φ, β is the deployment helix angle of the worm 31, Φ is the friction angle; tg Φ ═ μ, and μ is a friction coefficient. Since the helix angle of the worm 31 is typically small, less than the friction angle, a self-locking function is achieved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. An automatic regulating device for water quantity of a water channel comprises:
the water outlet device comprises a shell, a water outlet channel and a water outlet control device, wherein the shell limits the water outlet channel and comprises a body and mounting plates on two sides of the water outlet channel, and the mounting plates extend along the water flow direction;
a plurality of mounting grooves are uniformly formed in the mounting plate along the vertical direction;
the water flow guide plates limit the flow of water flow, and the water flow channels are closed after the water flow guide plates are rotatably spliced;
one end of the rotating shaft is fixedly connected with the water flow guide plate, and the other end of the rotating shaft is movably connected with the mounting groove;
a worm gear drivingly connected to the rotating shaft;
the worm is perpendicular to the worm wheel and is meshed and connected with the worm wheel;
the motor is in driving connection with the worm;
it is characterized in that the preparation method is characterized in that,
the water flow sensor is arranged on the water facing side of the shell;
the controller is connected to the water quantity sensor and is connected to the motor in a control mode;
the controller is used for receiving water flow information sensed by the water flow sensor, and the controller controls the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction according to the water flow information;
a water flow threshold value is preset in the controller, and when the water flow information is larger than the water flow threshold value, the controller controls and drives the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction to increase;
when the water flow information is smaller than the water flow threshold value, the controller controls and drives the motor to drive and adjust the angle of the water flow guide plate relative to the water flow direction to be reduced.
2. The waterway water-volume regulating device of claim 1,
the casing is a rectangular frame, the water flow guide plate is plate-shaped, and the water flow guide plate is installed in the horizontal direction perpendicular to the water flow direction and in the installation groove.
3. The waterway water-volume regulating device of claim 1,
the water flow guide plates are four, the water flow guide plates are uniformly installed on the installation grooves and form five water flow channels between the installation plates.
4. The waterway water-volume regulating device of claim 1,
the water flow sensor is arranged at the bottom end of the shell.
5. The waterway water volume adjusting device of claim 1, wherein the worm and the worm wheel are self-locked after the motor is deactivated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321558.1A CN112253772A (en) | 2020-11-23 | 2020-11-23 | Automatic water flow regulating device for water channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321558.1A CN112253772A (en) | 2020-11-23 | 2020-11-23 | Automatic water flow regulating device for water channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253772A true CN112253772A (en) | 2021-01-22 |
Family
ID=74225463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011321558.1A Pending CN112253772A (en) | 2020-11-23 | 2020-11-23 | Automatic water flow regulating device for water channel |
Country Status (1)
| Country | Link |
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| CN (1) | CN112253772A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080287052A1 (en) * | 2005-09-13 | 2008-11-20 | Cook Matthew D | Arrangement and method to sense flow using mechanical stress microsensors |
| CN205739541U (en) * | 2014-12-22 | 2016-11-30 | 威埃姆集团股份有限公司 | Multiple-blade proportional valve |
| CN106641381A (en) * | 2017-03-17 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Water gate control device for tests |
| CN206398369U (en) * | 2014-04-01 | 2017-08-11 | 霍尼韦尔国际公司 | Control the flow in fuid distribution system |
| KR20180055141A (en) * | 2016-11-16 | 2018-05-25 | 동아대학교 산학협력단 | Multi- Disk Type Valve |
| CN109253264A (en) * | 2018-10-03 | 2019-01-22 | 盐城欧润石化设备制造有限公司 | A kind of pipeline valve that flow velocity is controllable |
-
2020
- 2020-11-23 CN CN202011321558.1A patent/CN112253772A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080287052A1 (en) * | 2005-09-13 | 2008-11-20 | Cook Matthew D | Arrangement and method to sense flow using mechanical stress microsensors |
| CN206398369U (en) * | 2014-04-01 | 2017-08-11 | 霍尼韦尔国际公司 | Control the flow in fuid distribution system |
| CN205739541U (en) * | 2014-12-22 | 2016-11-30 | 威埃姆集团股份有限公司 | Multiple-blade proportional valve |
| KR20180055141A (en) * | 2016-11-16 | 2018-05-25 | 동아대학교 산학협력단 | Multi- Disk Type Valve |
| CN106641381A (en) * | 2017-03-17 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Water gate control device for tests |
| CN109253264A (en) * | 2018-10-03 | 2019-01-22 | 盐城欧润石化设备制造有限公司 | A kind of pipeline valve that flow velocity is controllable |
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Application publication date: 20210122 |
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| RJ01 | Rejection of invention patent application after publication |