CN106320291A - Safe environment-friendly device for water conservancy - Google Patents
Safe environment-friendly device for water conservancy Download PDFInfo
- Publication number
- CN106320291A CN106320291A CN201610691827.0A CN201610691827A CN106320291A CN 106320291 A CN106320291 A CN 106320291A CN 201610691827 A CN201610691827 A CN 201610691827A CN 106320291 A CN106320291 A CN 106320291A
- Authority
- CN
- China
- Prior art keywords
- pipe
- floodwaters
- drains
- water
- ring float
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
Abstract
The invention discloses a safe environment-friendly device for water conservancy, and belongs to the field of water conservancy safety facilities. The lower portion of a flood drainage pipe of the device stretches into a pipe type hole of a base, a transverse flange disc on the lower middle portion of the flood drainage pipe is fixed to the upper surface of the base, a water outlet in the lower end of the flood drainage pipe is made communicated with the pipe type hole of the base, and the pipe type hole of the base is connected with a flood drainage blind pass built at the bottom of a reservoir or connected with a flood drainage blind pass built at the bottom of a dam. The upper surface portion of the flood drainage pipe is sleeved with an annular floating body. The matching face of the annular floating body is matched with the outer surface of the upper surface portion of the flood drainage pipe, and therefore the annular floating body can slide on the upper surface portion of the flood drainage pipe, and a flood drainage channel can be opened or closed when the annular floating body slides up and down. The safe environment-friendly device for water conservancy is compact and reasonable in structure, convenient to manufacture and use, strong in ability of protecting dam safety, high in automation degree, good in flood drainage effect, free of manual watching during flood drainage and capable of automatically turning off a flood drainage switch when flood is lower than a warning water level to keep the water level.
Description
Technical field
The present invention relates to a kind of water conservancy safety and environmental protection device in water conservancy safety devices field.
Background technology
Present reservoir is substantially all does not has flood discharge valve, is essentially all employing overflow and drains off floodwaters, and its method is: on dykes and dams
Offer a flood discharge channel, or, dykes and dams are offered a flood discharge hole.Dykes and dams are offered flood discharge channel, owing to opening on dykes and dams
Flood discharge channel, causes the dykes and dams to be easy to be washed away by flood in the flood season.Dykes and dams are offered flood discharge hole, owing to flood having drift
Float, causes the floating thing in flood to plug flood discharge hole, then causes flood to cross dykes and dams.
Summary of the invention
The purpose that the present invention relates to be to provide for a kind of dykes and dams anti-flood capacity on reservoir do not have influential, can automatically arrange
The devices and methods therefor of flood discharge water.
For achieving the above object, water conservancy safety and environmental protection device of the present invention mainly includes ring float, buoyancy cavity, enters
Water hole, communicating pipe, apopore, cooperation face, drain off floodwaters pipe, pedestal.
The bottom of the described pipe that drains off floodwaters is stretched in the tubular type hole of pedestal, and the lateral flange dish of the middle and lower part of the pipe that drains off floodwaters is fixed on
Above pedestal, the outlet of pipe lower end of drainning off floodwaters communicates with the tubular type hole of pedestal, the tubular type hole of pedestal be built in bottom reservoir
Flood discharge secret tunnel connect or is connected with the flood discharge secret tunnel being built in dam base, the upper part at the pipe that drains off floodwaters be set with annular float
Body.The cooperation face of described ring float coordinates with the outer surface of the upper part of the pipe that drains off floodwaters and can be in the upper surface portion of pipe of drainning off floodwaters
Point upper slide, and can make to beat when opening the passage that drains off floodwaters, slide downward during ring float upward sliding closedown and drain off floodwaters passage；At ring
When shape buoyancy aid floats with the rising of water level, at the upward sliding on pipe that drains off floodwaters, the passage that drains off floodwaters then can be opened；At ring float
With water level decreasing when drainning off floodwaters slide downward on pipe, it is possible to close the passage that drains off floodwaters.
The described pipe that drains off floodwaters is the coalition of direct piping and lateral flange dish, direct piping part be hollow straight tube,
Upper end be water inlet, lower end be outlet, the lateral flange dish tube-surface in the bottom near direct piping and direct piping
Vertically；The drain off floodwaters outside of upper part of pipe is the outer surface of smooth tubular, the outer surface of smooth tubular and annular
The cooperation face of buoyancy aid coordinates.
Described ring float is the cavity body of annular, and the cavity body in ring float is buoyancy cavity, ring float
Inner ring surface is to cooperate with face, and cooperation face is the inner ring surface of smooth annular；Below ring float below one side or outside
Part has inlet opening, has apopore, the buoyancy between inlet opening and outlet on the ring surface coordinating face of ring float
Intracavity has communicating pipe to connect inlet opening and apopore, communicates with inlet opening and apopore communicating pipe；Described buoyancy cavity is to produce
Buoyancy cavity, the buoyancy that buoyancy cavity produces can the weight of support ring shape buoyancy aid when ring float can be made to float on the surface
Between water surface apopore on upper surface to the cooperation face of ring float.
Described pedestal is to be built in the base bottom reservoir, is built into the hollow base frame in tubular type hole；Pedestal is used for
The lower part of the fixing pipe that drains off floodwaters, tubular type hole is used for conveying water.
During installation, the lower end of the pipe that drains off floodwaters is inserted in the tubular type hole in the middle of pedestal, by the laterally protruding of pipe middle and lower part of drainning off floodwaters
Flange is fixed on pedestal；Afterwards, the cooperation surface cover of ring float is contained in the smooth tubular of the upper part of the pipe that drains off floodwaters
Outer surface.
In reservoir after water-retention, when the water surface in reservoir is less than the water storage level set, going out on the cooperation face of ring float
Water hole is blocked by the upper part of the pipe that drains off floodwaters and is sealed, and is disconnected the flood discharge passage entering the pipe that drains off floodwaters from inlet opening.When in reservoir
The water surface higher than the water storage level set time, ring float floats and the appearance of smooth tubular of upper part at the pipe that drains off floodwaters
Upward sliding on face, along with the floating of ring float, the apopore on the cooperation face of ring float exposes the upper end of the pipe that drains off floodwaters
Water inlet, water enters the water inlet of pipe upper end of drainning off floodwaters after inlet opening enters communicating pipe again through apopore, then from the pipe that drains off floodwaters
Enter in the tubular type hole in pedestal and water is discharged outside reservoir.When the water level in reservoir is along with opening of flood discharge passage after flood discharge,
Water level reduces naturally；After water level reduces, ring float is along with naturally declining along with water level, when water level reaches the safety level of setting
Time, the apopore on the cooperation face of ring float is along with the upper end falling below the pipe that drains off floodwaters of ring float；Now, annular is floating
Apopore on the cooperation face of body is blocked by the upper part of the pipe that drains off floodwaters and seals, and is disconnected and enters letting out of the pipe that drains off floodwaters from inlet opening
Flood passage.
A kind of manufacture method of water conservancy safety and environmental protection device, it is characterised in that:
Control of drainning off floodwaters causes the coalition of direct piping and lateral flange dish, and direct piping part creates hollow straight
Manage, upper end creates water inlet, lower end creates outlet, and lateral flange dish manufactures in the bottom near direct piping
Tube-surface vertical with direct piping；The drain off floodwaters outside of upper part of pipe creates the outer surface of smooth tubular, light
The sliding outer surface of tubular coordinates with the face that coordinates of ring float.
Ring float creates the cavity body of annular, and the cavity body in ring float creates buoyancy cavity, annular
The inner ring surface of buoyancy aid creates cooperation face, and cooperation face creates the inner ring surface of smooth straight pipe type；Under ring float
The lower part manufacture of face one side or outside has inlet opening, and manufacturing on the ring surface coordinating face of ring float has apopore,
Manufacture in buoyancy cavity between inlet opening and outlet to have and connect inlet opening and apopore communicating pipe, communicating pipe and inlet opening and
Apopore communicates.
Pedestal creates the base being built in bottom reservoir, creates the hollow base frame in tubular type hole.
The bottom of the described pipe that drains off floodwaters is stretched in the tubular type hole of pedestal, and the lateral flange dish of the middle and lower part of the pipe that drains off floodwaters is fixed on
Above pedestal, the outlet of pipe lower end of drainning off floodwaters communicates with the tubular type hole of pedestal, the tubular type hole of pedestal be built in bottom reservoir
Flood discharge secret tunnel connect or is connected with the flood discharge secret tunnel being built in dam base, the upper part at the pipe that drains off floodwaters be set with annular float
Body.
Described ring float is the slide switch of the flood discharge passage opening and closing water conservancy safety and environmental protection device, utilizes ring
The buoyancy that shape buoyancy aid produces automatically opens up flood discharge passage, utilizes the gravity of ring float to be automatically switched off flood discharge passage.
Described inlet opening and apopore are below the water surface of normal water-retention.
In order to make half heavy half floating floating thing in flood not enter, inlet opening blocks the intake tunnel on ring float,
It is fixed with drainage screen at the inlet opening of ring float.
Described water conservancy safety and environmental protection device need not the energy and drives when automatic flood discharge, not only environmental protection, but also safety.
The compact conformation of water conservancy safety and environmental protection device of the present invention rationally, manufacture and easy to use, the energy of protection embankment safety
Power is strong, automaticity is high, flood discharge effective, be not required to during flood discharge very important person guard, flood less than warning line time automatically close
Close flood discharge switch and keep water level.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the sectional structure during closedown of water conservancy safety and environmental protection device；
Fig. 2 is the schematic diagram of the sectional structure during unlatching of water conservancy safety and environmental protection device；
Fig. 3 is the schematic diagram of the sectional structure that water conservancy safety and environmental protection device is arranged in reservoir.
Shown in figure: ring float 1, communicating pipe 2, inlet opening 3, apopore 4, cooperation face 5, the pipe 6 that drains off floodwaters, water 7, pedestal 8,
Dykes and dams 9.
Detailed description of the invention
Water conservancy safety and environmental protection device of the present invention mainly includes ring float 1, buoyancy cavity, inlet opening 3, communicating pipe 2, apopore
4, cooperation face 5, the pipe 6 that drains off floodwaters, pedestal 8.
The bottom of the described pipe 6 that drains off floodwaters is stretched in the tubular type hole of pedestal 8, and the lateral flange dish of the middle and lower part of the pipe 6 that drains off floodwaters is solid
Being scheduled on above pedestal 8, the outlet of pipe 6 lower end that drains off floodwaters communicates with the tubular type hole of pedestal 8, the tubular type hole of pedestal 8 be built in
Flood discharge secret tunnel bottom reservoir connects or is connected with the flood discharge secret tunnel being built in bottom dykes and dams 9, at the upper part set of pipe 6 that drains off floodwaters
Equipped with ring float 1.The cooperation face 5 of described ring float 1 coordinates with the outer surface of the upper part of the pipe 6 that drains off floodwaters and can be
Drain off floodwaters and slide on the upper part of pipe 6, and can make to beat pass when opening the passage that drains off floodwaters, slide downward during ring float upward sliding
Close the passage that drains off floodwaters；When ring float 1 floats with the rising of water level, at the upward sliding on pipe 6 that drains off floodwaters, then can the row of opening
Flood passage；Ring float 1 with water level decreasing when drainning off floodwaters slide downward on pipe 6, it is possible to close the passage that drains off floodwaters.
The pipe 6 that drains off floodwaters creates the coalition of direct piping and lateral flange dish, and direct piping part creates hollow
Straight tube, upper end creates water inlet, lower end creates outlet, lateral flange dish manufactures under the direct piping
The tube-surface of end is vertical with direct piping；The drain off floodwaters outside of upper part of pipe 6 creates the appearance of smooth tubular
Face, the outer surface of smooth tubular coordinates with the face 5 that coordinates of ring float 1.
Ring float 1 creates the cavity body of annular, and the cavity body in ring float 1 creates buoyancy cavity, ring
The inner ring surface of shape buoyancy aid 1 creates cooperation face 5, and cooperation face 5 creates the inner ring surface of smooth straight pipe type；At ring float
Below 1, the lower part manufacture of one side or outside has inlet opening 3, and manufacturing on the ring surface in the cooperation face 5 of ring float 1 has
Apopore 4, manufactures in the buoyancy cavity between inlet opening 3 and outlet and has and connect inlet opening 3 and apopore 4 communicating pipe 2, connection
Pipe 2 communicates with inlet opening 3 and apopore 4.
Pedestal 8 creates the base being built in bottom reservoir, creates the hollow base frame in tubular type hole；Pedestal is used for
The lower part of the fixing pipe that drains off floodwaters, tubular type hole is used for conveying water.
During installation, the lower end of the pipe 6 that drains off floodwaters is inserted in the tubular type hole in the middle of pedestal 8, by the most convex of pipe 6 middle and lower part of drainning off floodwaters
Go out flange to be fixed on pedestal 8；Afterwards, the cooperation face 5 of ring float 1 is sleeved on upper part smooth of the pipe 6 that drains off floodwaters
The outer surface of tubular.
In reservoir after water-retention, when the water surface in reservoir is less than the water storage level set, coordinating on face 5 of ring float 1
Apopore 4 is blocked by the upper part of the pipe 6 that drains off floodwaters and seals, and is disconnected the flood discharge passage entering the pipe 6 that drains off floodwaters from inlet opening 3.When
When the water surface in reservoir is higher than the water storage level set, ring float 1 floats and the smooth pipe of upper part at the pipe 6 that drains off floodwaters
Upward sliding on the outer surface of shape, along with the floating of ring float 1, the apopore 4 on the cooperation face 5 of ring float 1 exposes row
The water inlet of the upper end of flood pipe 6, water enters entering of pipe 6 upper end of drainning off floodwaters through apopore 4 after inlet opening 3 enters communicating pipe 2 again
The mouth of a river, then enters the tubular type hole in pedestal from the pipe 6 that drains off floodwaters and is discharged outside reservoir by water 7.When the water level in reservoir is along with flood discharge
Opening of passage and after flood discharge, water level reduces naturally；After water level reduces, ring float 1, along with naturally declining along with water level, works as water
When position reaches the safety level set, apopore 4 the falling below along with ring float 1 on the cooperation face 5 of ring float 1
Drain off floodwaters the upper end of pipe 6；Now, the apopore 4 on the cooperation face 5 of ring float 1 is blocked by the upper part of the pipe 6 that drains off floodwaters and close
Envelope, is disconnected the flood discharge passage entering the pipe 6 that drains off floodwaters from inlet opening 3.
Claims (6)
1. a water conservancy safety and environmental protection device, it is characterised in that: described water conservancy safety and environmental protection device includes ring float, buoyancy
Chamber, interior siphunculus, inlet opening, communicating pipe, apopore, cooperation face, drain off floodwaters pipe, pedestal；
The bottom of the described pipe that drains off floodwaters is stretched in the tubular type hole of pedestal, and the lateral flange dish of the middle and lower part of the pipe that drains off floodwaters is fixed on pedestal
Above, the outlet of pipe lower end of drainning off floodwaters communicates with the tubular type hole of pedestal, the tubular type hole of pedestal be built in letting out bottom reservoir
Flood secret tunnel connects or is connected with the flood discharge secret tunnel being built in dam base, and the upper part at the pipe that drains off floodwaters is set with ring float；
The cooperation face of described ring float coordinates with the outer surface of the upper part of the pipe that drains off floodwaters and can be at the upper part of pipe that drains off floodwaters
Upper slip, and can make to beat when opening the passage that drains off floodwaters, slide downward during ring float upward sliding closedown and drain off floodwaters passage；In annular
When buoyancy aid floats with the rising of water level, at the upward sliding on pipe that drains off floodwaters, the passage that drains off floodwaters then can be opened；Ring float with
Water level decreasing and when drainning off floodwaters slide downward on pipe, it is possible to close and drain off floodwaters passage；
The described pipe that drains off floodwaters is the coalition of direct piping and lateral flange dish, and direct piping part is hollow straight tube, upper end
Be water inlet, lower end be outlet, the lateral flange dish tube-surface in the bottom near direct piping and direct piping hang down
Directly；The drain off floodwaters outside of upper part of pipe is the outer surface of smooth tubular, and the outer surface of smooth tubular floats with annular
The cooperation face of body coordinates；
Described ring float is the cavity body of annular, and the cavity body in ring float is buoyancy cavity, the internal ring of ring float
Face is to cooperate with face, and cooperation face is the inner ring surface of smooth annular；One side or the lower part of outside below ring float
There is inlet opening, the ring surface coordinating face of ring float has apopore, in the buoyancy cavity between inlet opening and outlet
There is communicating pipe to connect inlet opening and apopore, communicate with inlet opening and apopore communicating pipe；Described buoyancy cavity is to produce buoyancy
Cavity, the buoyancy that buoyancy cavity produces can the weight of support ring shape buoyancy aid water surface when ring float can be made to float on the surface
Between apopore on upper surface to the cooperation face of ring float；
Described pedestal is to be built in the base bottom reservoir, is built into the hollow base frame in tubular type hole；Pedestal is used for fixing
Drain off floodwaters the lower part of pipe, and tubular type hole is used for conveying water；
During installation, the lower end of the pipe that drains off floodwaters is inserted in the tubular type hole in the middle of pedestal, by the laterally protruding flange of pipe middle and lower part of drainning off floodwaters
It is fixed on pedestal；Afterwards, the cooperation surface cover of ring float is contained in outside the smooth tubular of upper part of the pipe that drains off floodwaters
Surface；
In reservoir after water-retention, when the water surface in reservoir is less than the water storage level set, the apopore on the cooperation face of ring float
Blocked by the upper part of the pipe that drains off floodwaters and seal, be disconnected the flood discharge passage entering the pipe that drains off floodwaters from inlet opening；When the water in reservoir
Face higher than set water storage level time, ring float float and on the outer surface of the smooth tubular of the upper part of the pipe that drains off floodwaters
Upward sliding, along with the floating of ring float, the apopore on the cooperation face of ring float exposes the water inlet of the upper end of the pipe that drains off floodwaters
Mouthful, water enters the water inlet of pipe upper end of drainning off floodwaters after inlet opening enters communicating pipe again through apopore, then enters from the pipe that drains off floodwaters
Water is discharged outside reservoir by the tubular type hole in pedestal；When the water level in reservoir is along with opening of flood discharge passage after flood discharge, water level
Naturally reduce；After water level reduces, ring float is along with naturally declining along with water level, when water level reaches the safety level set,
Apopore on the cooperation face of ring float is along with the upper end falling below the pipe that drains off floodwaters of ring float；Now, ring float
Cooperation face on apopore blocked by the upper part of the pipe that drains off floodwaters and seal, be disconnected and enter the flood discharge of pipe of drainning off floodwaters from inlet opening
Passage.
Water conservancy safety and environmental protection device the most according to claim 1, it is characterised in that: ring float is to open and close water conservancy
The slide switch of the flood discharge passage of safety and environmental protection device, the buoyancy utilizing ring float to produce automatically opens up flood discharge passage, utilization
The gravity of ring float is automatically switched off flood discharge passage.
Water conservancy safety and environmental protection device the most according to claim 1, it is characterised in that: inlet opening and apopore are the most normal
The water surface of water-retention；
Inlet opening blocks the intake tunnel on ring float, in annular to make half heavy half floating floating thing in flood not enter
It is fixed with drainage screen at the inlet opening of buoyancy aid.
Water conservancy safety and environmental protection device the most according to claim 1, it is characterised in that: described water conservancy safety and environmental protection device exists
Need not the energy during automatic flood discharge drive, not only environmental protection, but also safety.
Water conservancy safety and environmental protection device the most according to claim 1, it is characterised in that: described water conservancy safety and environmental protection device
Compact conformation rationally, manufacture and easy to use, the ability of protection embankment safety is strong, automaticity is high, flood discharge effective, let out
It is not required to very important person guard during flood, is automatically switched off flood discharge switch when flood is less than warning line and keeps water level.
6. the manufacture method of a water conservancy safety and environmental protection device, it is characterised in that: control of drainning off floodwaters causes direct piping with horizontal
The coalition of flange, direct piping part creates hollow straight tube, upper end creates water inlet, lower end creates
Outlet, the lateral flange dish tube-surface in the bottom near direct piping is vertical with direct piping；Drain off floodwaters the upper surface portion of pipe
The outside divided creates the outer surface of smooth tubular, and the outer surface of smooth tubular is joined with the face that coordinates of ring float
Close；
Ring float creates the cavity body of annular, and the cavity body in ring float creates buoyancy cavity, ring float
Inner ring surface create cooperation face, cooperation face creates the inner ring surface of smooth straight pipe type；Below ring float one
The lower part manufacture of face or outside has inlet opening, and manufacturing on the ring surface coordinating face of ring float has apopore, is entering
Manufacture in buoyancy cavity between water hole and outlet to have and connect inlet opening and apopore, communicating pipe and inlet opening and water outlet communicating pipe
Hole communicates；
Pedestal creates the base being built in bottom reservoir, creates the hollow base frame in tubular type hole；
The bottom of the described pipe that drains off floodwaters is stretched in the tubular type hole of pedestal, and the lateral flange dish of the middle and lower part of the pipe that drains off floodwaters is fixed on pedestal
Above, the outlet of pipe lower end of drainning off floodwaters communicates with the tubular type hole of pedestal, the tubular type hole of pedestal be built in letting out bottom reservoir
Flood secret tunnel connects or is connected with the flood discharge secret tunnel being built in dam base, and the upper part at the pipe that drains off floodwaters is set with ring float.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610691827.0A CN106320291B (en) | 2016-08-22 | 2016-08-22 | Water conservancy safety environmental protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610691827.0A CN106320291B (en) | 2016-08-22 | 2016-08-22 | Water conservancy safety environmental protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106320291A true CN106320291A (en) | 2017-01-11 |
| CN106320291B CN106320291B (en) | 2020-12-01 |
Family
ID=57743689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610691827.0A Active CN106320291B (en) | 2016-08-22 | 2016-08-22 | Water conservancy safety environmental protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106320291B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219905Y (en) * | 1995-03-25 | 1996-02-14 | 贵州省水利科学研究所 | Automatic opening or closing water-taking device by reservoir buoyancy |
| JP2003111526A (en) * | 2001-10-03 | 2003-04-15 | Eikichi Kogyo Kk | Paddy field water level-adjusting device |
| CN2813707Y (en) * | 2005-07-02 | 2006-09-06 | 金贤世 | Automatic locating supplying water sluice gate for rice field |
| CN201362843Y (en) * | 2009-01-17 | 2009-12-16 | 金贤世 | Automatic water supplying gate for locating paddy fields |
| CN105804034A (en) * | 2016-04-29 | 2016-07-27 | 江苏冠甲水利科技有限公司 | Seepage-preventing ditch water level automatic constant valve |
-
2016
- 2016-08-22 CN CN201610691827.0A patent/CN106320291B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219905Y (en) * | 1995-03-25 | 1996-02-14 | 贵州省水利科学研究所 | Automatic opening or closing water-taking device by reservoir buoyancy |
| JP2003111526A (en) * | 2001-10-03 | 2003-04-15 | Eikichi Kogyo Kk | Paddy field water level-adjusting device |
| CN2813707Y (en) * | 2005-07-02 | 2006-09-06 | 金贤世 | Automatic locating supplying water sluice gate for rice field |
| CN201362843Y (en) * | 2009-01-17 | 2009-12-16 | 金贤世 | Automatic water supplying gate for locating paddy fields |
| CN105804034A (en) * | 2016-04-29 | 2016-07-27 | 江苏冠甲水利科技有限公司 | Seepage-preventing ditch water level automatic constant valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106320291B (en) | 2020-12-01 |
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Effective date of registration: 20201029 Address after: 408000 No. 52 Pine Road, Fuling District, Chongqing, China Applicant after: CHONGQING BEIJING SCIENCE & TECHNOLOGY RESEARCH AND DEVELOPMENT Co.,Ltd. Address before: 646500 Lin County of Luzhou City, Sichuan province Jiefang Road No. 93 Applicant before: Wu Zhongsheng |
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