CN207761027U - A kind of device on pipeline and the pipe-line system including the device - Google Patents
A kind of device on pipeline and the pipe-line system including the device Download PDFInfo
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- CN207761027U CN207761027U CN201721419190.6U CN201721419190U CN207761027U CN 207761027 U CN207761027 U CN 207761027U CN 201721419190 U CN201721419190 U CN 201721419190U CN 207761027 U CN207761027 U CN 207761027U
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Abstract
The utility model discloses a kind of device on pipeline and including the pipe-line system of the device, described device includes well body, level gauging pipe and flap valve；The well body and level gauging pipe are set on pipeline, and with the pipeline connection；The flap valve is set to the junction of well body and upstream；Described device further includes the liquid level gauge being separately positioned in level gauging pipe and well body, the liquid level for detecting upstream water body and downstream water.Described device can be used for measuring the flow for flowing through the pipeline, maximum stream flow can be controlled, reverse-filling is can be also used for, dexterously flow monitoring, maximum stream flow control and reverse-filling are combined within one device, are very suitable for the demand of existing drainage system.
Description
Technical field
The utility model belongs to flow monitoring and technical field of drainage, and in particular to a kind of device and packet on pipeline
Include the pipe-line system of the device.
Background technology
Flow refers to the material quantity by a certain section, i.e. instantaneous flow in the unit interval.In modern industrial production mistake
Cheng Zhong, flow are important one of procedure parameter, are the efficiency of weighing device and the important indicator of economy, be production operation and
The foundation of control commonly uses measurement and control flow to determine the proportioning and consumption of material, in fact because in most of industrial productions
Existing Automation of Manufacturing Process and optimized control；While in order to carry out business accounting, it is also necessary to know the medium total amount flowed through.Institute
With measurement and the control of flow are to realize a vital task of industrial processes.
The type of flow-measuring method and instrument is various, and sorting technique is also very much, and is directed to different application fields, right
Also different in the requirement of used flow-measuring method and instrument, i.e., each flow-measuring method and instrument all have specific
Applicability also has its limitation.
In water inlet and/or outlet pipeline system in the municipal sewerage engineering in China, for the discharge of sewage control at
Regulated and controled at any time each in pipe-line system by the control to the discharge of sewage in pipe-line system for an important field of research
Flap valve and associated component realize the smooth discharge of water body, avoid various flood and waterlogs caused by being discharged not in time because of rainwater excess
Evil.
In current pipe-line system, common flow controller is all kinds of flowmeters to be installed in pipeline, but it is faced
So complicated huge pipe-line system, needs the quantity of flowmeter to be mounted to be bound to quite a few, and the structure of most flowmeters
Complexity, it is bulky, it installs and debugs more complicated, and be difficult to repair；Most of instrument and meter is only intended to clean list
Phase liquid is not particularly suited for sewage and rainwater common in pipe-line system, may also have some solid suspensions etc.；Most pipes
Need not be especially accurate for the control of flow in the system of road, if using to the more stringent flowmeter of required precision, it is also inevitable
Cause procurement price high, the appearance for the various problems such as investment is larger, and operation and maintenance cost is higher.
Further more, the applicable surface of existing volume control device is relatively narrow, generally it is only capable of using as flow control, exploitation has
More multi-functional volume control device is that existing drainage system is badly in need of.
Utility model content
In order to improve the deficiencies in the prior art, the utility model provides a kind of device on pipeline and including the dress
The pipe-line system set.Described device can be used for measuring the flow for flowing through the pipeline, can control maximum stream flow, can also use
In reverse-filling, dexterously flow monitoring, maximum stream flow control and reverse-filling are combined within one device, are very suitable for existing
The demand of some drainage systems.
The utility model provides the following technical solutions：
A kind of device on pipeline, described device includes well body, level gauging pipe and flap valve；
The well body and level gauging pipe are set on pipeline, and with the pipeline connection；
The flap valve is set to the junction of well body and upstream；
Described device further includes the liquid level gauge being separately positioned in level gauging pipe and well body, for detect upstream water body and
The liquid level of downstream water.
According to the utility model, the level gauging pipe is located at upstream, and the well body is located at downstream pipe；The liquid
Liquid level gauge in the measurement pipe of position is used to detect the liquid level of upstream water body, and the liquid level gauge in the well body is for detecting downstream water
The liquid level of body.
According to the utility model, the level gauging pipe is located at downstream pipe, and the well body is located at upstream；The liquid
Liquid level gauge in the measurement pipe of position is used to detect the liquid level of downstream water, and the liquid level gauge in the well body is for detecting upper water
The liquid level of body.
According to the utility model, the well body and level gauging pipe are set to parallel on the pipeline.
According to the utility model, described device further includes controller, and the flap valve headstock gear being arranged on flap valve, described
Controller is connect with the liquid level gauge in level gauging pipe, the liquid level gauge in well body and flap valve headstock gear signal respectively, for receiving
The liquid level signal of liquid level gauge monitoring in liquid level gauge and well body in level gauging pipe and the opening size signal of flap valve, base
The flow for the water body for flowing through the pipeline is determined in the signal.
According to the utility model, the flap valve headstock gear can be electronic flap valve headstock gear or fluid pressure type flap valve headstock gear.
According to the utility model, the electronic flap valve headstock gear includes lead screw and encoder, and the lead screw is clapped for calculating
The adjustable height of door；The encoder is for recording rotating cycle.
Flap valve is opened and closed using the displacement of lead screw, and is calculated and is clapped according to the rotating cycle and lead screw screw pitch recorded in encoder
Door adjustable height, flap valve aperture is calculated further according to flap valve sectional area.Such as the flap valve cross-sectional area is rectangular, according to lifting
The width of height and flap valve calculates the aperture of flap valve.
According to the utility model, the fluid pressure type flap valve headstock gear includes displacement sensor, for calculating flap valve aperture.
According to the utility model, the type of drive of the flap valve is realized using dead weight and hydraulic action, without
Other extra powers are provided.
According to the utility model, the flap valve is selected from the flap valve that shuts off.
The utility model also provides a kind of pipe-line system, and the pipe-line system includes above-mentioned for the device in pipeline.
According to the utility model, the pipe-line system further includes pipeline, that is, the pipe of the level gauging pipe and well body is arranged
Road.
The utility model also provides the purposes of above-mentioned apparatus, the reverse-filling being used on pipeline.
Preferably, it is used to cut the reverse-filling on dirty pipe.
Preferably, it is used in shunting well cut the reverse-filling on dirty pipe.
The utility model also provides the purposes of above-mentioned apparatus, the flow monitoring being used on pipeline and/or maximum stream flow control
System.
Preferably, the flow monitoring for being used to cut on dirty pipe and/or maximum stream flow control.
Preferably, it is used in shunting well cut the flow monitoring on dirty pipe and/or maximum stream flow control.
The utility model also provides a kind of double liquid level flow monitoring method on pipeline, and the method is based on above-mentioned
For the device on pipeline, described method includes following steps：
1) the liquid level H of upstream water body is monitored1With the liquid level H of downstream water2；
2) liquid level difference (H of upstream water body and downstream water is determined1-H2) and the flap valve aperture S and flow Q for flowing through pipeline
Relational expression is as follows：
In formula,
S --- flap valve aperture (discharge area in flap valve) (m2)；
H1--- the liquid level (m) of upstream water body；
H2--- the liquid level (m) of downstream water；
σs--- flood coefficient；
G --- acceleration of gravity (m/s2)；
M --- the discharge coefficient of free overflow, it is related with the boundary conditions such as pipeline；
σc--- side constriction coefficient reflects the cross-direction shrinkage due to pipeline, reduces effective overcurrent width and increased office
Influence of portion's energy loss to discharge capacity；
Influence of the relative opening degree of μ --- the discharge coefficient of pipeline free discharge, reflection pipeline and flap valve to vent flow；
3) liquid level difference and the relational expression of upstream water body and downstream water based on monitoring, pipeline is flowed through to realize
The flow monitoring of water body.
According to the utility model, in the relational expression, σsTo flood coefficient, with liquid level difference (H1-H2) related, it can be direct
It tables look-up to obtain.
According to the utility model, in the relational expression, K is set coefficient, as liquid level difference (H1-H2) after determination, K is also true
Fixed value.
According to the utility model, in the relational expression, the parameter is by determining related coefficient of tabling look-up, and root when in use
It is modified according to actual conditions；Alternatively, according to actual measured value, relational expression is directly utilized
Middle proportionate relationship determines the set COEFFICIENT K of related coefficient, such as when front and back liquid level difference determines, σsCan table look-up acquisition；Soil
One timing of foundation structure and size, equipment installation dimension and position is built, K is definite value；Therefore, by monitoring upstream water body under
Liquid level difference (the H of swimming body1-H2) and flap valve aperture S, you can calculate the flow Q for flowing through pipeline.
According to the utility model, the double liquid level flow monitoring method is used for the flow monitoring of pipeline.
According to the utility model, flow monitoring of the double liquid level flow monitoring method for cutting dirty pipe.
According to the utility model, the double liquid level flow monitoring method is used in shunting well cut the flow monitoring of dirty pipe.
The utility model also provides a kind of double liquid level maximum stream flow control method on pipeline, and the method is to be based on
The above-mentioned device being used on pipeline, described method includes following steps：
(1) the liquid level H of upstream water body is monitored1With the liquid level H of downstream water2；
(2) liquid level difference (H of upstream water body and downstream water is determined1-H2) and flow through the maximum stream flow Qmax and flap valve of pipeline
Maximum opening Smax relational expression it is as follows：
In formula,
Maximum opening (the maximum discharge area in flap valve) (m of Smax --- flap valve2)；
H1--- the liquid level (m) of upstream water body；
H2--- the liquid level (m) of downstream water；
σs--- flood coefficient；
G --- acceleration of gravity (m/s2)；
M --- the discharge coefficient of free overflow, it is related with the boundary conditions such as pipeline；
σc--- side constriction coefficient reflects the cross-direction shrinkage due to pipeline, reduces effective overcurrent width and increased office
Influence of portion's energy loss to discharge capacity；
Influence of the relative opening degree of μ --- the discharge coefficient of pipeline free discharge, reflection pipeline and flap valve to vent flow；
(3) liquid level difference of upstream water body and downstream water based on monitoring flows through maximum stream flow Qmax and the institute of pipeline
Relational expression is stated, to determine the maximum opening Smax of flap valve, realizes the control of the maximum stream flow Qmax for the water body for flowing through pipeline.
Preferably, in step (3), the control of the maximum opening Smax of flap valve is realized by flap valve headstock gear and controller.
The utility model also provides a kind of method of reverse-filling, and the method is based on above-mentioned for the dress on pipeline
It sets；The anti-down irrigation method includes the following steps：
1) level value for monitoring the level value and downstream water of upstream water body respectively by liquid level gauge, is denoted as H respectively1And H2；
2) pass through the level value H of upstream water body1With the level value H of downstream water2Size judged：
Work as H1-H2More than zero or H2-H1When less than zero, upstream water body washes flap valve open by hydraulic action, flows to downstream；
Work as H1-H2Equal to zero or H2-H1When equal to zero, the unlatching size of flap valve remains unchanged；And
Work as H1-H2Less than zero or H2-H1When more than zero, downstream water flows to upstream by hydraulic action, by hydraulic action
Flap valve is closed with the gravity of flap valve itself, downstream water is avoided to pour in down a chimney into upstream water body.
Preferably, the method is for cutting the reverse-filling on dirty pipe.
Preferably, the method is for cutting the reverse-filling on dirty pipe in shunting well.
The beneficial effects of the utility model：
(1) flow monitoring and/or the maximum stream flow control that pipeline may be implemented for the device on pipeline of the utility model
System, can also realize the monitoring of pipeline reverse-filling, a whole set of can configure and carry out it is prefabricated, it is simple in structure, save build and
Equipment cost is greatly reduced the input of labour.
(2) device being used on pipeline of the utility model can also realize remote control and monitoring, by monitoring in real time
The folding size of the liquid level difference and flap valve of upstream water body and downstream water is, it can be achieved that double liquid level flow monitoring and/or maximum stream flow
Control and reverse-filling.
Description of the drawings
Fig. 1 is the front view of the device described in one preferred embodiment of the utility model；Wherein, 1- upstreams, 2-
Liquid level gauge measurement pipe, 3- liquid level gauges, 4- liquid level gauges, 6- downstream pipes, 7- flap valves.
Fig. 2 is the vertical view of the device described in one preferred embodiment of the utility model；Wherein, 8- well bodies.
Specific implementation mode
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.Furthermore, it is to be understood that having read in recorded in the utility model
After appearance, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this
Utility model limited range.
Embodiment 1
As depicted in figs. 1 and 2, the present embodiment provides a kind of device on pipeline, described device includes well body 8, liquid
Position measurement pipe 2 and flap valve 7；
The well body 8 and level gauging pipe 2 are set on pipeline, and with the pipeline connection；
The flap valve 7 is set to the junction of well body 8 and upstream；
Described device further includes the liquid level gauge being separately positioned in level gauging pipe 2 and well body 8, for detecting upstream water body
With the liquid level of downstream water.
In a preferred embodiment of the utility model, the level gauging pipe 2 is located at upstream, the well body
8 are located at downstream pipe；Liquid level gauge in the level gauging pipe 2 is used to detect the liquid level of upstream water body, in the well body 8
Liquid level gauge be used to detect the liquid level of downstream water.
In a preferred embodiment of the utility model, the level gauging pipe 2 is located at downstream pipe, the well body
8 are located at upstream；Liquid level gauge in the level gauging pipe 2 is used to detect the liquid level of downstream water, in the well body 8
Liquid level gauge be used to detect the liquid level of upstream water body.
In a preferred embodiment of the utility model, the well body and level gauging pipe are set to the pipe parallel
On the road.
In a preferred embodiment of the utility model, described device further includes controller, and is arranged in flap valve
On flap valve headstock gear, the controller respectively with the liquid level gauge in level gauging pipe, the liquid level gauge in well body and flap valve open and close
Machine signal connects, the liquid level signal for receiving the monitoring of the liquid level gauge in the liquid level gauge and well body in liquid level measurement pipe, and claps
The opening size signal of door determines the flow for the water body for flowing through the pipeline based on the signal.
In a preferred embodiment of the utility model, the flap valve headstock gear can be electronic flap valve headstock gear or
Fluid pressure type flap valve headstock gear.
In a preferred embodiment of the utility model, the electronic flap valve headstock gear includes lead screw and encoder,
The lead screw is used to calculate the adjustable height of flap valve；The encoder is for recording rotating cycle.
Flap valve is opened and closed using the displacement of lead screw, and is calculated and is clapped according to the rotating cycle and lead screw screw pitch recorded in encoder
Door adjustable height, flap valve aperture is calculated further according to flap valve sectional area.Such as the flap valve cross-sectional area is rectangular, according to lifting
The width of height and flap valve calculates the aperture of flap valve.
In a preferred embodiment of the utility model, the fluid pressure type flap valve headstock gear includes displacement sensor,
For calculating flap valve aperture.
In a preferred embodiment of the utility model, the type of drive of the flap valve is made using dead weight and waterpower
With realization, without providing other extra powers.
In a preferred embodiment of the utility model, the flap valve is selected from the flap valve that shuts off.
Embodiment 2
The present embodiment provides a kind of pipe-line system, the pipe-line system includes the dress described in embodiment 1 in pipeline
It sets.
In a preferred embodiment of the utility model, the pipe-line system further includes pipeline, that is, the liquid is arranged
The pipeline of position measurement pipe and well body.
In a preferred embodiment of the utility model, the pipeline is the reverse-filling cut on dirty pipe.
In a preferred embodiment of the utility model, the pipeline is that dirty pipe is cut in shunting well.
Embodiment 3
The present embodiment provides a kind of double liquid level flow monitoring method on pipeline, the method is to be based on embodiment 1
The device being used on pipeline, described method includes following steps：
1) the liquid level H of upstream water body is monitored1With the liquid level H of downstream water2；
2) liquid level difference (H of upstream water body and downstream water is determined1-H2) and the flap valve aperture S and flow Q for flowing through pipeline
Relational expression is as follows：
In formula,
S --- flap valve aperture (discharge area in flap valve) (m2)；
H1--- the liquid level (m) of upstream water body；
H2--- the liquid level (m) of downstream water；
σs--- flood coefficient；
G --- acceleration of gravity (m/s2)；
M --- the discharge coefficient of free overflow, it is related with the boundary conditions such as pipeline；
σc--- side constriction coefficient reflects the cross-direction shrinkage due to pipeline, reduces effective overcurrent width and increased office
Influence of portion's energy loss to discharge capacity；
Influence of the relative opening degree of μ --- the discharge coefficient of pipeline free discharge, reflection pipeline and flap valve to vent flow；
3) liquid level difference and the relational expression of upstream water body and downstream water based on monitoring, pipeline is flowed through to realize
The flow monitoring of water body.
In a preferred embodiment of the utility model, in the relational expression, σsTo flood coefficient, with liquid level difference
(H1-H2) related, it can be obtained with table look-at.
In a preferred embodiment of the utility model, in the relational expression, K is set coefficient, works as liquid level difference
(H1-H2) after determination, K is also determining value.
In a preferred embodiment of the utility model, in the relational expression, the parameter passes through determining phase of tabling look-up
Relationship number, and be modified when in use according to actual conditions；Alternatively, according to actual measured value, relational expression is directly utilizedMiddle proportionate relationship determines the set COEFFICIENT K of related coefficient, such as when front and back liquid level difference determines
When, σsCan table look-up acquisition；One timing of foundation of civil work structure snd size, equipment installation dimension and position, K is definite value；Therefore,
By the liquid level difference (H for monitoring upstream water body and downstream water1-H2) and flap valve aperture S, you can calculate the flow for flowing through pipeline
Q。
In a preferred embodiment of the utility model, the double liquid level flow monitoring method is used for the flow of pipeline
Monitoring.
In a preferred embodiment of the utility model, stream of the double liquid level flow monitoring method for cutting dirty pipe
Amount monitoring.
In a preferred embodiment of the utility model, the double liquid level flow monitoring method is used to cut in shunting well
The flow monitoring of dirty pipe.
Embodiment 4
The present embodiment provides a kind of double liquid level maximum stream flow control method on pipeline, the method is based on implementation
The device being used on pipeline described in example 1, described method includes following steps：
(1) the liquid level H of upstream water body is monitored1With the liquid level H of downstream water2；
(2) liquid level difference (H of upstream water body and downstream water is determined1-H2) and flow through the maximum stream flow Qmax and flap valve of pipeline
Maximum opening Smax relational expression it is as follows：
In formula,
Maximum opening (the maximum discharge area in flap valve) (m of Smax --- flap valve2)；
H1--- the liquid level (m) of upstream water body；
H2--- the liquid level (m) of downstream water；
σs--- flood coefficient；
G --- acceleration of gravity (m/s2)；
M --- the discharge coefficient of free overflow, it is related with the boundary conditions such as pipeline；
σc--- side constriction coefficient reflects the cross-direction shrinkage due to pipeline, reduces effective overcurrent width and increased office
Influence of portion's energy loss to discharge capacity；
Influence of the relative opening degree of μ --- the discharge coefficient of pipeline free discharge, reflection pipeline and flap valve to vent flow；
(3) liquid level difference of upstream water body and downstream water based on monitoring flows through maximum stream flow Qmax and the institute of pipeline
Relational expression is stated, to determine the maximum opening Smax of flap valve, realizes the control of the maximum stream flow Qmax for the water body for flowing through pipeline.
In a preferred embodiment of the utility model, in step (3), realized by flap valve headstock gear and controller
The control of the maximum opening Smax of flap valve.
Embodiment 5
The present embodiment provides a kind of method of reverse-filling, the method is based on described in embodiment 1 on pipeline
Device；The anti-down irrigation method includes the following steps：
1) level value for monitoring the level value and downstream water of upstream water body respectively by liquid level gauge, is denoted as H respectively1And H2；
2) pass through the level value H of upstream water body1With the level value H of downstream water2Size judged：
Work as H1-H2More than zero or H2-H1When less than zero, upstream water body washes flap valve open by hydraulic action, flows to downstream；
Work as H1-H2Equal to zero or H2-H1When equal to zero, the unlatching size of flap valve remains unchanged；And
Work as H1-H2Less than zero or H2-H1When more than zero, downstream water flows to upstream by hydraulic action, by hydraulic action
Flap valve is closed with the gravity of flap valve itself, downstream water is avoided to pour in down a chimney into upstream water body.
In a preferred embodiment of the utility model, the method is for cutting the reverse-filling on dirty pipe.
In a preferred embodiment of the utility model, the method is anti-down on dirty pipe for being cut in shunting well
It fills.
In drainage procedure, if downstream water liquid level occur is higher than upper water body liquid level, water body can be in the pipe
Pour in down a chimney phenomenon in road, i.e. downstream water pours in upstream end, causes upstream water body that cannot drain in time and waterlogging occurs.In order to
The generation for preventing this phenomenon, the utility model proposes a kind of anti-down irrigation methods using double liquid level, are surveyed in well body and liquid level
Liquid level gauge is installed respectively in buret, the liquid level of upstream water body and downstream water is monitored by liquid level gauge to judge to flow through the pipe
Whether the water body on road can pour in down a chimney phenomenon.When the liquid level of upstream water body is higher than the liquid level of downstream water, water body
Flap valve downstream end is washed open by gravity to drain；When the liquid level of upstream end water body is less than the liquid level of downstream water
When, water body flows to upstream end by gravity, but relies on the gravity of hydraulic action and flap valve itself, can close flap valve,
Pour in down a chimney phenomenon to effectively prevent occurring downstream water.
More than, the embodiment of the utility model is illustrated.But the utility model is not limited to above-mentioned implementation
Mode.Within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, should be included in
Within the scope of protection of the utility model.
Claims (10)
1. a kind of device on pipeline, described device includes well body, level gauging pipe and flap valve；
The well body and level gauging pipe are set on pipeline, and with the pipeline connection；
The flap valve is set to the junction of well body and upstream；
Described device further includes the liquid level gauge being separately positioned in level gauging pipe and well body, for detecting upstream water body and downstream
The liquid level of water body.
2. the apparatus according to claim 1, which is characterized in that the level gauging pipe is located at upstream, the well body
Positioned at downstream pipe；Liquid level gauge in the level gauging pipe is used to detect the liquid level of upstream water body, in the well body
Liquid level gauge is used to detect the liquid level of downstream water.
3. the apparatus according to claim 1, which is characterized in that the level gauging pipe is located at downstream pipe, the well body
Positioned at upstream；Liquid level gauge in the level gauging pipe is used to detect the liquid level of downstream water, in the well body
Liquid level gauge is used to detect the liquid level of upstream water body.
4. device according to any one of claim 1-3, which is characterized in that the well body and level gauging pipe are set parallel
It is placed on the pipeline.
5. device according to any one of claim 1-3, which is characterized in that described device further includes controller, and
The flap valve headstock gear being arranged on flap valve, the controller respectively with the liquid level gauge in level gauging pipe, the liquid level gauge in well body
It is connected with flap valve headstock gear signal, the liquid level letter for receiving the monitoring of the liquid level gauge in the liquid level gauge and well body in liquid level measurement pipe
Number and flap valve opening size signal, based on the signal determine flow through the pipeline water body flow.
6. device according to claim 5, which is characterized in that the flap valve headstock gear can be electronic flap valve headstock gear or
Fluid pressure type flap valve headstock gear.
7. device according to claim 6, which is characterized in that the electronic flap valve headstock gear includes lead screw and encoder,
The lead screw is used to calculate the adjustable height of flap valve；The encoder is for recording rotating cycle；
The fluid pressure type flap valve headstock gear includes displacement sensor, for calculating flap valve aperture.
8. the apparatus according to claim 1, which is characterized in that the flap valve is selected from the flap valve that shuts off.
9. a kind of pipe-line system, the pipe-line system includes described in any one of claim 1-8 for the device in pipeline.
10. pipe-line system according to claim 9, it is characterised in that the pipe-line system further includes pipeline, that is, institute is arranged
State level gauging pipe and the pipeline of well body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721419190.6U CN207761027U (en) | 2017-10-30 | 2017-10-30 | A kind of device on pipeline and the pipe-line system including the device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721419190.6U CN207761027U (en) | 2017-10-30 | 2017-10-30 | A kind of device on pipeline and the pipe-line system including the device |
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| CN207761027U true CN207761027U (en) | 2018-08-24 |
Family
ID=63178818
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844150A (en) * | 2017-10-30 | 2018-03-27 | 武汉圣禹排水系统有限公司 | A kind of device and flow monitoring and maximum stream flow control method and anti-down irrigation method based on the device |
-
2017
- 2017-10-30 CN CN201721419190.6U patent/CN207761027U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107844150A (en) * | 2017-10-30 | 2018-03-27 | 武汉圣禹排水系统有限公司 | A kind of device and flow monitoring and maximum stream flow control method and anti-down irrigation method based on the device |
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