CN106439176A - Long-distance water supply pipe accident quick valve closing device and method - Google Patents
Long-distance water supply pipe accident quick valve closing device and method Download PDFInfo
- Publication number
- CN106439176A CN106439176A CN201610817616.7A CN201610817616A CN106439176A CN 106439176 A CN106439176 A CN 106439176A CN 201610817616 A CN201610817616 A CN 201610817616A CN 106439176 A CN106439176 A CN 106439176A
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- Prior art keywords
- valve
- straight
- bar
- hydraulic motor
- closing
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
Abstract
The invention discloses a long-distance water supply pipe accident quick valve closing device and method. A valve linked with a hydraulic motor rotating shaft is arranged on a branch of a hydraulic motor; and when two branches of a hydraulic pipeline are communicated, the total flow of the hydraulic pipeline is higher, the output rotating speed of the hydraulic motor is higher, and the valve rotates quickly to realize the purpose of quick valve closing. After the valve is closed to a turning point, the flow in the hydraulic pipeline is reduced, the output rotating speed of the hydraulic motor is lowered, and the valve closing speed is lowered to realize the purpose of slow valve closing. Relative positions of a ball and an axial column are adjusted to change the valve openness when a handle makes contact with a straight rod and to change the position of the turning point in the closing process. For opening working conditions, a reversing valve is started, and a high-pressure end and a low-pressure end are switched, so that the flowing directions of flows entering the hydraulic motor are totally opposite, and the output rotating speed of the hydraulic motor is reversed to realize one-section straight opening of the valve.
Description
Technical field
The present invention relates to distance water supply project technical field, it is related to the Valve controlling dress in a kind of distance water supply project
Put, for reducing the quick valve closer of pipeline water hammer pressure and method in distance water system.
Background technology
Long distance water transfer project is to solve the uneven effective means of water resource spatial and temporal distributions, but the water producing in engineering operation
Hammer pressure is seriously threatened the safety of water-carriage system.In water-carriage system, modal equipment is exactly valve, for long distance water transfer
Engineering, typically can only cut off current by Slow Close valve, and is produced by controlling to close when valve speed controls closing valve
Huge water hammer pressure.The Main Function of traditional valve is just introduced into the loss of flood peak under normal circumstances, thus adjusting flow, if
There is pipe explosion accident in pipeline, adjacent valve must shut off, to reduce the impact that booster brings.Need promptly when accident in engineering
Close during pipe end valve it is necessary to adopt rational method for closing.When having an accident in system, the control machine such as corresponding valve
Structure answers rapid action excision accident source, but because aqueduct circuit is very long, once there is pipe explosion accident, pipeline flow increases rapidly
Plus, if rapid-closure damper, very big pressure may be led to, induce second accident.
In order to avoid there is excessive water hammer pressure, convenient operation valve, typically adopt line in current long distance water transfer project
Property the conventional method closed of one section of straight line.If closing valve excessive velocities, it will produce huge water hammer pressure, can lead to again
Continuous pipe explosion accident.Therefore, the valve closing in Long-distance Pipeline for Water Conveyance is all very slow process.Although it is permissible slowly to close valve
Control water hammer pressure, but, because closing valve time is longer, response time of accident is slow, exacerbates original accident to a certain extent and makes
The loss becoming.How to ensure, under conditions of pass valve pressure meets pipeline pressure-bearing standard, to close valve, cut-off accident pipe as soon as possible
The problem demanding prompt solution in road, always this area.The present invention in the case of ensureing that water hammer pressure meets pipeline pressure-bearing standard,
The method proposing and devising fast quick-closing valve in distance water supply project, closes valve as soon as possible, accelerates incident response speed, with
Just the loss that reduction accident causes.
Content of the invention
Goal of the invention：The conventional method that straight line is closed typically is adopted at present in distance water supply project.If it is too fast to close valve
If, it will produce huge water hammer pressure, continuous pipe explosion accident can be led to again.Although slowly closing valve can control water hammer pressure
Power, but, because closing valve time is longer, response time of accident is slow, exacerbates the loss that original accident causes to a certain extent.For
Overcome this shortcoming of existing water delivery engineering valve, the present invention is intended to provide one kind be applied in distance water supply project can be real
The control device and method of existing rapid-closure damper.
Technical scheme：The a kind of of the present invention is applied to realize the device of rapid-closure damper in distance water supply project, bag
Include hydraulic oil container, fluid pressure line and hydraulic motor, described hydraulic motor is connected with valve, described fluid pressure line has parallel connection
Tie point and the second branch road, described tie point is in series with the control valve with hydraulic motor linkage.Oil is high from hydraulic oil container
Pressure side enters hydraulic motor, enters low-pressure end from another entrance of hydraulic motor, can be by controlling flow in fluid pressure line
To control the output speed of hydraulic motor, thus the size of the closing velocity of controllable valve.
Specifically, described control valve has spheroid, is provided with rotary body in spheroid, and a rotating body has connecting pipeline, rotation
Be fixedly connected with the connecting rod below swivel, connecting rod and straight-bar be fixedly connected；Straight-bar can horizontally rotate around the spheroid center of circle, and carries
Dynamic rotary body rotates, thus driving connecting pipeline to rotate.When straight-bar horizontally rotates around the spheroid center of circle, body will be rotated and turn
Dynamic, therefore the branch road being disposed with spheroid is cut off, in fluid pressure line, flow reduces, and leads to the closing velocity of valve to reduce, and realizes first
Slow closing purpose after soon.
Specifically, the axial columns of described hydraulic motor are fixedly connected with the valve rod of valve, and described axial columns have handle,
Described handle is overlapped with straight-bar.With axial columns as the center of circle, the centre of sphere is radius with the distance of axial columns, keeps straight-bar to point to axially
Post, the position of horizontal adjustment ball, you can change the aperture of valve when handle is contacted with straight-bar, thus change in closing process turning
The position of point.
Specifically, described fluid pressure line main road is in series with choke valve.The flow of hydraulic motor determines hydraulic motor
Output speed, according to valve closing and can open rule by calculating throttle valve opening in adjustment fluid pressure line, by saving
Stream valve, to control the flow in fluid pressure line, changes the size of pressure oil flow rate, and then the rotating speed of control hydraulic motor output, from
And can control closing and the speed opened of valve.
Specifically, described fluid pressure line is provided with reversal valve.Start the stream that reversal valve can change oil body in fluid pressure line
To, thus change hydraulic motor output rotary speed direction, realize the purpose of valve opening.
The present invention proposes to apply the distance water supply line of the quick valve closer of above-mentioned distance water supply line accident simultaneously
Accident fast quick-closing valve method is it is adaptable to the fast quick-closing valve of distance water supply line accident.
In rapid-closure damper, two branch roads of fluid pressure line high-pressure side all connect, and now fluid pressure line total flow is larger,
The rotating speed of hydraulic motor output is larger, and axial columns rotary speed is very fast, and band movable valve quickly rotates, and realizes the mesh of fast quick-closing valve
's；
After valve closing is to flex point, handle touches straight-bar, and drives straight-bar to rotate around the centre of sphere of spheroid, straight-bar
Body is rotated rotate, connecting pipeline also rotates, because rotary body is solid except connecting pipeline is with outer portion,
So when fluid pressure line a branch road be cut off, flow in pipeline reduces；Because the output speed of hydraulic motor is by flowing through
Determining, the rotating speed of hydraulic motor output reduces and leads to axial columns rotating speed to reduce, with axial columns even the uninterrupted of hydraulic motor
The valve closing speed connecing reduces, and realizes the purpose of slowly closing；
Due to due to straight-bar size, handle is touched straight-bar and drives straight-bar will be departed from straight-bar after making small angle rotation to connect
Touch, now straight-bar and rotary body stop the rotation, and the branch road flowing through spheroid is constantly in off state.
The quick valve closer of above-mentioned distance water supply line accident is also applied for valve is carried out straight line rule unlatching：
Before Open valve, start reversal valve, by high-pressure side with low-pressure end switching so that accessing hydraulic motor traffic flow
To completely on the contrary, the rotating speed of hydraulic motor output is contrary, leads to axial columns rotating speed contrary, and the valve being connected with axial columns is made and closed
When closing, contrary action, realizes valve opening；Because in pipeline, flow is constant, the rotating speed of hydraulic motor output also keeps constant,
Lead to axial columns invariablenes turning speed, the valve closing constant airspeed being connected with axial columns, realize the purpose of straight line unlatching.
Now straight-bar still disalignment certain angle, due to due to length, any situation does not connect straight-bar with handle
Touch, therefore the branch road flowing through spheroid is constantly in off state.
During use, the inventive system comprises hydraulic oil container high-pressure side, low-pressure end, reversal valve, fluid pressure line, choke valve,
Spheroid, connecting pipeline, rotary body, connecting rod, hydraulic motor, handle, valve, straight-bar etc..Oil is from the two of hydraulic oil container high-pressure side
Bar branch road flows out, and is combined into a pipeline afterwards again and enters hydraulic motor, flows out from the outlet of hydraulic motor, enter low pressure by pipeline
End.
Control the flow in fluid pressure line, and then the rotating speed of control hydraulic motor output by regulation choke valve, thus
The closing velocity of controllable valve.
Fluid pressure line is divided into two branch roads, and one of branch road is disposed with spheroid, is provided with rotary body, wherein revolves in spheroid
Swivel is rotatable.It is built-in with connecting pipeline, rotary body is all solid except connecting pipeline other parts, below rotary body and connecting rod
It is fixedly connected.Straight-bar is fixedly connected with the connecting rod, and straight-bar can horizontally rotate around the spheroid center of circle, and body rotation is rotated, thus
Connecting pipeline is driven to rotate.
It is provided with reversal valve on the right side of hydraulic oil container, the high-pressure side of fluid pressure line can be switched and low-pressure end to be controlled with this
Oil body flow direction in fluid pressure line；The axial columns of hydraulic motor are fixedly connected with the valve rod of valve, axial columns rotarily drive valve
The open and close of door；
Below so that water delivery engineering occurs emergency episode to close valve as a example, the inventive principle of this valve system and beneficial is described
Effect.
The conventional method that generally one section straight line of valve closing method conventional in water delivery engineering at present is closed, but routine side
The method shut-in time long it is impossible to accomplish the quick response of accident, therefore the valve system of the present invention takes closing side first quick and back slow
Method.In rapid-closure damper, two branch roads of fluid pressure line high-pressure side all connect, and now fluid pressure line total flow is larger, hydraulic pressure
The rotating speed of motor output is larger, and axial columns rotary speed is very fast, and band movable valve quickly rotates, and realizes the purpose of fast quick-closing valve.When
To flex point, handle touches straight-bar to valve closing, and drives straight-bar to rotate around the centre of sphere of spheroid.Straight-bar is rotated body
Rotate, connecting pipeline also rotates, because rotary body is solid except connecting pipeline is with outer portion, so when hydraulic pressure
One branch road of pipeline is cut off, and the flow in pipeline reduces.Because the output speed of hydraulic motor is by flowing through hydraulic motor
Controlling, the rotating speed of hydraulic motor output reduces the valve pass leading to axial columns rotating speed to reduce, being connected with axial columns to uninterrupted
Close speed to reduce, realize the purpose of slowly closing.Due to due to straight-bar size, handle touches straight-bar and drives straight-bar to make little angle
To disengage with straight-bar after degree rotation, now straight-bar and rotary body stop the rotation, and the branch road flowing through spheroid is constantly in open circuit
State.
In general water delivery engineering, valve opening method adopts straight line to open rule, and valve system of the present invention also can achieve to valve
The straight line rule of door is opened, and before Open valve, starts reversal valve, by high-pressure side with low-pressure end switching so that accessing hydraulic pressure
Motor flux and flow direction is completely contrary, and the rotating speed of hydraulic motor output is contrary, leads to axial columns rotating speed contrary, is connected with axial columns
Valve makees the action contrary with when closing, and realizes valve opening.Now straight-bar still disalignment certain angle, due to length
Reason, straight-bar situation any with handle does not contact, therefore the branch road flowing through spheroid is constantly in off state, and in pipeline, flow is permanent
Fixed, the rotating speed of hydraulic motor output also keeps constant, leads to axial columns invariablenes turning speed, the valve closing speed being connected with axial columns
Constant, realize the purpose of straight line unlatching.
Adjustment ball and the relative position of axial columns, you can change the aperture of valve when handle is contacted with straight-bar, thus changing
Become the position of flex point in closing process.
Brief description：
Fig. 1 is the structure top view when two branch roads of fluid pressure line are in connected state for the present invention；
Fig. 2 is the structure front view when two branch roads of fluid pressure line are in connected state for the present invention；
Fig. 3 is present invention partial enlarged drawing at valve closing to flex point；
Fig. 4 is present invention partial enlarged drawing when straight-bar is disengaged with handle；
Fig. 5 is present invention partial enlarged drawing in valve opening；
Fig. 6 is that in the embodiment of the present invention, valve relative opening degree changes over graph；
Fig. 7 is that in the embodiment of the present invention, upstream pressure changes over graph；
Fig. 8 is that in the embodiment of the present invention, pipeline flow changes over graph.
In figure is labeled as：Hydraulic oil container high-pressure side 1, low-pressure end 2, reversal valve 3, fluid pressure line 4, spheroid 5, hydraulic motor 6,
Handle 7, straight-bar 8, connecting pipeline 9, rotary body 10, connecting rod 11, axial columns 12, valve 13, choke valve 14.
Specific embodiment：
Embodiment：
The valving being applied in long distance water transfer project of the present embodiment, as shown in Figure 1, Figure 2, Figure 3 and Figure 4,
When closing valve, due to connecting two branch roads of hydraulic oil container high-pressure side 1 all in connected state, fluid pressure line 4 total flow is relatively
Greatly, the rotating speed of hydraulic motor 6 output is larger, and axial columns 12 rotary speed is larger, and band movable valve 13 comparatively fast rotates, and realizes quick closing
The purpose of valve.When valve 13 is closed to aperture flex point, handle 7 touches straight-bar 8, and drives straight-bar 8 to revolve around spheroid 5 centre of sphere
Turn, because connecting rod 11 is consolidated in straight-bar 8, rotary body 10 is built in spheroid 5 and is consolidated in connecting rod 11, therefore straight-bar 8 drives
Rotary body 10 rotates, and the connecting pipeline 9 being therefore built in rotary body 10 also rotates, because rotary body 10 removes connection
Pipeline 9 be with outer portion solid, so when flow through the branch road of spheroid 5 and be cut off, flow in fluid pressure line 4 reduces, so
The rotating speed of hydraulic motor 6 output reduces, and leads to axial columns 12 rotating speed to reduce, valve 13 closing velocity with axial columns 12 concrete mutually
Reduce, realize the slow purpose closing valve.Due to due to straight-bar 8 length, handle 7 drives straight-bar 8 will take off with straight-bar 8 after rotating
From contact, now rotary body 10 also stops the rotation, and the branch road flowing through spheroid 5 is constantly in off state.
In general water delivery engineering, valve opening adopts straight line to open rule, and the present invention also can achieve that straight line rule is opened, such as
Shown in Fig. 5, before Open valve 13, start reversal valve 3, hydraulic oil container high-pressure side 1 and low-pressure end 2 are switched so that hydraulic pressure
In pipeline 4, the flow direction of oil body is completely contrary, and the oil body flow direction accessing hydraulic motor 6 is completely contrary, the rotating speed of hydraulic motor 6 output
On the contrary, lead to axial columns 12 rotating speed contrary, make the action contrary with when closing with the valve 13 of axial columns 12 concrete mutually, realize valve
Door 13 unlatching.Now straight-bar 8 still disalignment certain angle, due to due to length, straight-bar 8 is with any situation of handle 7 all
Do not contact, therefore the branch road flowing through spheroid 5 is constantly in off state, in fluid pressure line 4, flow is constant, hydraulic motor 6 output
Rotating speed also keeps constant, leads to axial columns 12 invariablenes turning speed, constant with valve 13 opening speed of axial columns 12 concrete mutually, realizes
The purpose that one section of straight line is opened.
Certain long distance water transfer project, overall length 72.08km, design discharge is 12.67m3/ s, buries PCCP by import and export section, ditch
Section and cross a river pipe bridge section composition.Pipeline work pressure 0.4～0.8MPa, arranges anchor block and logical air bleeding valve along the line, enters manhole, emptying
The affiliated facilities such as valve, service valve, pipeline sets two groups of maintenance valves, at respectively 23.78km and 55.08km.Design conditions are run
When, upper pond level 143.6m, level of tail water 128.39m.This application example is directed to conventional pass valve method and the present invention closes valve method
Carry out the simulation of this transient process operating mode, concrete result of calculation is as shown in Figure 6 to 8.
As shown in FIG. 6 and 7, when valve adopts conventional method to close, the valve closing time is 1500s, now before valve
Maximum pressure is 208.26m；When being closed using the inventive method, before valve, maximum pressure is under 208.03m, with conventional method
Before valve, maximum pressure is close, and closing valve time is only 533s.As shown in figure 8, when closing valve using the inventive method, pipeline flow is very
Reduce soon to 0m3/ s, greatly accelerates the accident corresponding speed of valve, saves great lot of water resources, reduces causality loss.
Claims (8)
1. a kind of quick valve closer of distance water supply line accident, including hydraulic oil container, fluid pressure line and hydraulic motor, described
Hydraulic motor be connected with valve it is characterised in that：Tie point and second branch road of parallel connection are had on described fluid pressure line, described
Control valve with hydraulic motor linkage is in series with tie point.
2. the quick valve closer of distance water supply line accident according to claim 1 it is characterised in that：Described control valve
There is spheroid, rotary body be installed in spheroid, a rotating body has connecting pipeline, is fixedly connected with the connecting rod below rotary body,
Connecting rod is fixedly connected with straight-bar.
3. the quick valve closer of distance water supply line accident according to claim 1 it is characterised in that：Described hydraulic pressure horse
The axial columns reaching are fixedly connected with the valve rod of valve, and described axial columns have handle, and described handle is overlapped with straight-bar.
4. the quick valve closer of distance water supply line accident according to claim 1 it is characterised in that：Described hydraulic tube
It is in series with choke valve on the main road of road.
5. the quick valve closer of distance water supply line accident according to claim 1 it is characterised in that：Described hydraulic tube
Reversal valve is provided with road.
6. the quick valve closer of distance water supply line accident according to claim 1 is it is characterised in that with axial columns be
The center of circle, the centre of sphere is radius with the distance of axial columns, keeps straight-bar to point to axial columns, the position of horizontal adjustment ball, you can to change
The aperture of valve when handle is contacted with straight-bar, thus arrange the position of flex point in closing process.
7. a kind of fast quick-closing valve method of distance water supply line accident it is characterised in that：
In rapid-closure damper, two branch roads of fluid pressure line high-pressure side all connect, and now fluid pressure line total flow is larger, hydraulic pressure
The rotating speed of motor output is larger, and axial columns rotary speed is very fast, and band movable valve quickly rotates, and realizes the purpose of fast quick-closing valve；
After valve closing is to flex point, handle touches straight-bar, and drives straight-bar to rotate around the centre of sphere of spheroid, and straight-bar drives
Rotary body rotates, and connecting pipeline also rotates, because rotary body is solid except connecting pipeline is with outer portion, so
When fluid pressure line a branch road be cut off, flow in main road reduces；Because the output speed of hydraulic motor is by flowing through hydraulic pressure
Determining, the rotating speed of hydraulic motor output reduces and leads to axial columns rotating speed to reduce the uninterrupted of motor, is connected with axial columns
Valve closing speed reduces, and realizes the purpose of slowly closing；
Due to due to straight-bar size, handle is touched straight-bar and will be disengaged with straight-bar after driving straight-bar to make small angle rotation,
Now straight-bar and rotary body stop the rotation, and the branch road flowing through spheroid is constantly in off state.
8. the fast quick-closing valve method of distance water supply line accident according to claim 7 it is characterised in that：
Before Open valve, start reversal valve, by high-pressure side with low-pressure end switching so that access hydraulic motor flux and flow direction is complete
Entirely contrary, the rotating speed of hydraulic motor output is contrary, leads to axial columns rotating speed contrary, when the valve being connected with axial columns is made with closing
Contrary action, realizes valve opening；
Now straight-bar still deviates horizontal line certain angle length, and due to due to length, straight-bar is being opened in operating mode not with handle
Contact, therefore the branch road flowing through spheroid is constantly in off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817616.7A CN106439176B (en) | 2016-09-12 | 2016-09-12 | The quick valve closer of long range water supply line accident and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610817616.7A CN106439176B (en) | 2016-09-12 | 2016-09-12 | The quick valve closer of long range water supply line accident and method |
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| Publication Number | Publication Date |
|---|---|
| CN106439176A true CN106439176A (en) | 2017-02-22 |
| CN106439176B CN106439176B (en) | 2018-12-14 |
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ID=58167655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610817616.7A Active CN106439176B (en) | 2016-09-12 | 2016-09-12 | The quick valve closer of long range water supply line accident and method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428065A (en) * | 2018-04-09 | 2018-08-21 | 长江勘测规划设计研究有限责任公司 | A kind of large size water delivery engineering burst accident emergency scheduling method and monitoring system |
| CN109404743A (en) * | 2018-12-21 | 2019-03-01 | 北京高安屯垃圾焚烧有限公司 | Water supply line leakage protection system |
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| JPS5694084A (en) * | 1979-12-28 | 1981-07-30 | Nippon Kokan Kk <Nkk> | Closing speed controller for valve |
| KR20050018909A (en) * | 2005-01-28 | 2005-02-28 | 주식회사 바램 | Control valve system for preventing water hammer |
| CN102635539A (en) * | 2012-04-05 | 2012-08-15 | 兰州理工大学 | Power system of water pump for long-distance water supply trucks and long-distance water supply truck provided with system |
| CN204592200U (en) * | 2015-03-19 | 2015-08-26 | 合肥巨澜安全技术有限责任公司 | A kind of long-range water supply hydraulic system |
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| CN105317767A (en) * | 2014-07-30 | 2016-02-10 | 丹佛斯动力系统有限责任两合公司 | Rotational speed limitation device for motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5694084A (en) * | 1979-12-28 | 1981-07-30 | Nippon Kokan Kk <Nkk> | Closing speed controller for valve |
| KR20050018909A (en) * | 2005-01-28 | 2005-02-28 | 주식회사 바램 | Control valve system for preventing water hammer |
| CN102635539A (en) * | 2012-04-05 | 2012-08-15 | 兰州理工大学 | Power system of water pump for long-distance water supply trucks and long-distance water supply truck provided with system |
| CN105317767A (en) * | 2014-07-30 | 2016-02-10 | 丹佛斯动力系统有限责任两合公司 | Rotational speed limitation device for motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428065A (en) * | 2018-04-09 | 2018-08-21 | 长江勘测规划设计研究有限责任公司 | A kind of large size water delivery engineering burst accident emergency scheduling method and monitoring system |
| CN109404743A (en) * | 2018-12-21 | 2019-03-01 | 北京高安屯垃圾焚烧有限公司 | Water supply line leakage protection system |
| CN109404743B (en) * | 2018-12-21 | 2020-09-25 | 北京高安屯垃圾焚烧有限公司 | Water supply pipeline leakage protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106439176B (en) | 2018-12-14 |
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