CN110593217A - Gate stiffening device for bidirectional water retaining gate - Google Patents

Gate stiffening device for bidirectional water retaining gate Download PDF

Info

Publication number
CN110593217A
CN110593217A CN201910881737.1A CN201910881737A CN110593217A CN 110593217 A CN110593217 A CN 110593217A CN 201910881737 A CN201910881737 A CN 201910881737A CN 110593217 A CN110593217 A CN 110593217A
Authority
CN
China
Prior art keywords
gate
vertical supporting
supporting piece
stiffening device
vertical support
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.)
Granted
Application number
CN201910881737.1A
Other languages
Chinese (zh)
Other versions
CN110593217B (en
Inventor
刘胜
蔡泓
马亮
李玉华
张兴旺
李刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Fifth Survey and Design Institute Group Co Ltd
Original Assignee
China Railway Fifth Survey and Design Institute Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Railway Fifth Survey and Design Institute Group Co Ltd filed Critical China Railway Fifth Survey and Design Institute Group Co Ltd
Priority to CN201910881737.1A priority Critical patent/CN110593217B/en
Publication of CN110593217A publication Critical patent/CN110593217A/en
Application granted granted Critical
Publication of CN110593217B publication Critical patent/CN110593217B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/22Stop log dams; Emergency gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/26Vertical-lift gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/26Vertical-lift gates
    • E02B7/36Elevating mechanisms for vertical-lift gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/54Sealings for gates

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Barrages (AREA)

Abstract

The embodiment of the application relates to the technical field of water conservancy and water environment treatment, in particular to a gate stiffening device for a bidirectional water retaining gate. The gate stiffening device comprises a first vertical supporting piece, a second vertical supporting piece, a connecting piece, a swinging screw rod, a swinging nut and a driving mechanism; the first vertical supporting piece and the second vertical supporting piece are arranged in parallel; the top of the first vertical supporting piece is hinged with a swing nut; the swing screw is in threaded fit with the swing nut; the top end of the swinging screw rod is fixedly provided with a driving mechanism, and the bottom end of the swinging screw rod can be rotatably arranged at the top of the second vertical supporting piece; one end of the connecting piece is hinged on the first vertical supporting piece, and the other end is hinged on the second vertical supporting piece. The gate stiffening device has simple structure, low cost and bidirectional water stopping function.

Description

Gate stiffening device for bidirectional water retaining gate
Technical Field
The application relates to the technical field of water conservancy and water environment treatment, in particular to a gate stiffening device for a bidirectional water retaining gate.
Background
The existing bidirectional water retaining gate usually adopts a hydraulic support rod or an air bag support gate to carry out bidirectional water retaining. Compared with a plane gate, the existing bidirectional water retaining gate has the advantages of complex structure, higher manufacturing cost and high maintenance cost. But the existing plane gate cannot realize an effective bidirectional water stopping function due to structural particularity of the plane gate. The flood-blocking stoplog gate for the dam has a simple structure, and the stiffening device can only be operated in a waterless land area and cannot be implemented under the condition that water exists on both sides.
Disclosure of Invention
The embodiment of the application provides a gate stiffening device for a bidirectional water retaining gate, and the gate stiffening device has the advantages of simple structure, low manufacturing cost and bidirectional water stopping function.
The embodiment of the application provides a gate stiffening device for a bidirectional water retaining gate, which comprises a first vertical supporting piece, a second vertical supporting piece, a connecting piece, a swinging screw rod, a swinging nut and a driving mechanism;
the first vertical support and the second vertical support are arranged in parallel;
the top of the first vertical supporting piece is hinged with the swing nut;
the swing screw is in threaded fit with the swing nut;
the top end of the swing screw is fixedly provided with a driving mechanism, and the bottom end of the swing screw is rotatably arranged at the top of the second vertical supporting piece;
one end of the connecting piece is hinged on the first vertical supporting piece, and the other end of the connecting piece is hinged on the second vertical supporting piece.
Preferably, a screw groove assembly for mounting the swing screw is arranged at the top of the second vertical support;
the swing screw is mounted on the second vertical support through the screw and groove assembly.
Preferably, the connector has oppositely disposed first and second ends;
the first end part is arranged on the first vertical supporting piece through a pin shaft;
the second end is mounted to the second vertical support member by a pin.
Preferably, the connecting piece is a connecting plate or a connecting rod, and the first end portion and the second end portion are both provided with through holes.
Preferably, the first vertical support and the second vertical support are solid structures or hollow structures.
Preferably, the first vertical support and the second vertical support are both square pipes or rectangular pipes.
Preferably, the first vertical support and the second vertical support are both made of stainless steel or aluminum alloy materials.
Preferably, the drive mechanism is a manual drive mechanism or a powered drive mechanism.
Preferably, the drive mechanism is a hand wheel.
Preferably, the drive mechanism is a reduction motor.
Adopt the gate stiffening device for two-way manger plate floodgate that provides in this application embodiment, have following beneficial effect:
the gate stiffening device comprises a first vertical supporting piece, a second vertical supporting piece, a connecting piece, a swinging screw rod, a swinging nut and a driving mechanism; in the actual use process, the gate stiffening device is detachably installed in a gate groove of the bidirectional water retaining gate, the driving mechanism controls the swinging screw rod to rotate, the swinging screw rod is in threaded fit with a swinging nut hinged to the top of the first vertical supporting piece, the swinging screw rod is used for pulling/pressing the second vertical supporting piece, the end part of the connecting piece is driven to rotate relative to the first vertical supporting piece and the second vertical supporting piece, the second vertical supporting piece is lifted along the vertical direction and displaced along the horizontal direction, the distance between the first vertical supporting piece and the second vertical supporting piece is reduced/enlarged, and the stiffening function is realized; when the interval between first vertical support piece and the second vertical support piece becomes big, the gate stiffening member forms the internal stay between gate and the gate groove until reaching effective stagnant water.
The gate stiffening device can enable the first vertical supporting piece and the second vertical supporting piece to move in parallel and equidistantly through the connecting piece hinged with the first vertical supporting piece and the second vertical supporting piece, and the gate is uniformly extruded up and down, so that the water stop of the gate and the gate groove are uniformly pressed and sealed, and the effective bidirectional water retaining function of the gate is realized; therefore, the gate stiffening device has the characteristics of simple structure, low manufacturing cost, convenient operation and bidirectional water stopping function.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic perspective view of a gate stiffening device according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of the A-direction structure of the gate stiffening means provided in FIG. 1;
FIG. 3 is a schematic structural diagram of a bidirectional water gate using the gate stiffening device according to the embodiment of the present application;
FIG. 4 is a top view of the bi-directional water gate of FIG. 3;
fig. 5 is a schematic sectional view of the bi-directional water gate shown in fig. 3.
Reference numerals:
1-a gate stiffening device; 2-a gate; 3-a gate slot; 4-gate bottom; 5-gate pier; 6-water stop belt;
11-a first vertical support; 12-a second vertical support; 13-a connector; 14-oscillating screw; 15-oscillating the nut; 16-a drive mechanism; 17-screw trough assembly.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the application provides a gate stiffening device 1 for a bidirectional water retaining gate, and as shown in the structures of fig. 1 and 2, the gate stiffening device 1 comprises a first vertical supporting piece 11, a second vertical supporting piece 12, a connecting piece 13, a swing screw 14, a swing nut 15 and a driving mechanism 16;
the first vertical support 11 and the second vertical support 12 are both arranged in the vertical direction; as shown in the structure of fig. 1 and 2, the first vertical support 11 and the second vertical support 12 are both arranged in parallel along the vertical direction; the first vertical support 11 and the second vertical support 12 need to have sufficient strength and rigidity, the first vertical support 11 and the second vertical support 12 may be a solid structure or a hollow structure, and when the first vertical support 11 and the second vertical support 12 are hollow structural members, both the first vertical support 11 and the second vertical support 12 may be square pipes or rectangular pipes; when the first vertical supporting member 11 and the second vertical supporting member 12 are solid structural members, the first vertical supporting member 11 and the second vertical supporting member 12 may be solid structural members such as a square rod member, a rectangular rod member, an i-shaped steel, a channel steel and the like; no matter the first vertical supporting piece 11 and the second vertical supporting piece 12 are solid structures or hollow structures, the first vertical supporting piece 11 and the second vertical supporting piece 12 can be made of metal materials such as stainless steel and aluminum alloy materials;
the top of the first vertical supporting piece 11 is hinged with a swing nut 15; as shown in the configuration of fig. 1 and 2, the oscillating nut 15 is hinged on top of the first vertical support 11, so that the oscillating nut 15 can rotate with respect to the first vertical support 11;
the swing screw 14 is in threaded fit with the swing nut 15; as shown in the structure of fig. 1 and 2, the swing screw 14 is provided with threads and is obliquely arranged on the top of the first vertical support member 11 and the top of the second vertical support member 12, and the middle of the swing screw passes through a swing nut 15 hinged on the top of the first vertical support member 11 and is in threaded fit with the swing nut 15; through the threaded fit of the swing screw 14 and the swing nut 15, and the fixed mounting of the swing nut 15 on the top of the first vertical support 11, when the swing screw 14 is rotated by the driving mechanism 16, the position adjustment of the swing screw 14 along the axial direction thereof can be realized;
the top end of the swing screw 14 is fixedly provided with a driving mechanism 16, and the bottom end of the swing screw is rotatably arranged at the top of the second vertical support 12; as shown in fig. 1 and fig. 2, a hand wheel for driving the swing screw 14 to rotate is hinged to the top end of the swing screw 14, the hand wheel is only one of the manual driving mechanisms 16, the driving mechanism 16 for driving the swing screw 14 to rotate may be the manual driving mechanism 16, or may be a power driving mechanism 16, that is, the driving mechanism 16 may be a hand wheel, a wrench, or the like driven by human power, or may be a power driving mechanism 16 driven by power such as a speed reduction motor, a servo motor, a hydraulic driving mechanism 16, or the like; when the power driving mechanism 16 is adopted to drive the swing screw 14, manual operation can be replaced, the labor intensity of operators is reduced, and the driving efficiency is improved; in order to realize the movable connection of the swing screw 14 and the second vertical support 12, a screw groove assembly 17 for installing the swing screw 14 is arranged at the top of the second vertical support 12; the swing screw 14 is mounted to the second vertical support 12 through the screw channel assembly 17, and the swing screw 14 is mounted to the top of the second vertical support 12 through the screw channel assembly 17, so that the swing screw 14 does not disengage from the second vertical support 12 while rotating, i.e., the swing screw 14 can rotate on the top of the second vertical support 12 and can pull/press the second vertical support 12 in the vertical direction; when the driving mechanism 16 is operated by adopting a hand wheel, electromechanical equipment such as hydraulic pressure, an air bag and the like are not needed for assistance, and the water stop failure rate of the gate 2 caused by the failure of the electromechanical equipment is reduced.
One end of the connecting member 13 is hinged on the first vertical support 11 and the other end is hinged on the second vertical support 12. As shown in fig. 1 and fig. 2, a plurality of connecting plates are arranged between the first vertical supporting member 11 and the second vertical supporting member 12, or one connecting plate may be arranged as long as the connection strength between the first vertical supporting member 11 and the second vertical supporting member can be satisfied; the connecting piece 13 has a first end and a second end which are oppositely arranged; the first end part is arranged on the first vertical supporting piece 11 through a pin shaft; the second end part is mounted on the second vertical supporting part 12 through a pin shaft, and the two end parts of the connecting part 13 are hinged to the first vertical supporting part 11 and the second vertical supporting part 12 through the pin shaft respectively, so that the first vertical supporting part 11 and the second vertical supporting part 12 can move relatively when the driving mechanism 16 drives the swing screw 14 to rotate, and the second vertical supporting part 12 can be controlled to lift relative to the first vertical supporting part 11 through the driving mechanism 16 under the condition that the first vertical supporting part 11 is fixed; the connecting piece 13 can be a connecting plate, a connecting rod or a connecting pipe, and the first end part and the second end part are provided with through holes for penetrating pin shafts.
The gate stiffening device 1 comprises a first vertical supporting piece 11, a second vertical supporting piece 12, a connecting piece 13, a swinging screw 14, a swinging nut 15 and a driving mechanism 16; in the actual use process, the gate stiffening device 1 is detachably arranged in the gate groove 3 of the bidirectional water retaining gate, the rotation of the swinging screw 14 is controlled by a driving mechanism 16, the swinging screw 14 is in threaded fit with a swinging nut 15 hinged at the top of the first vertical supporting piece 11, the second vertical supporting member 12 is pulled/pressed by the swinging screw 14, the end part of the connecting piece 13 is driven to rotate relative to the first vertical supporting member 11 and the second vertical supporting member 12, and then the second vertical supporting piece 12 is lifted along the vertical direction and displaced along the horizontal direction, so that the distance between the first vertical supporting piece 11 and the second vertical supporting piece 12 is reduced/enlarged, when the gate 2 and the second vertical supporting piece 12 are fixedly connected together, the lifting of the gate 2 in the vertical direction and the displacement in the horizontal direction can be simultaneously realized, and the opening and closing of the gate 2 are completed; when the distance between the first vertical support 11 and the second vertical support 12 becomes large, the gate 2 stiffening member forms an internal stay between the gate 2 and the gate slot 3 until effective water stop is reached. When it is necessary to open gate 2, drive mechanism 16 is rotated to pull oscillating screw 14, and second vertical support 12 is pulled up, and the distance between first vertical support 11 and second vertical support 12 is reduced, at this time, the stiffening member of gate 2 can be pulled out, and gate 2 is pulled up.
The gate stiffening device 1 can enable the first vertical supporting piece 11 and the second vertical supporting piece 12 to move parallelly and equidistantly through the connecting piece 13 hinged with the first vertical supporting piece 11 and the second vertical supporting piece 12, and evenly extrude the gate 2 up and down, so that the water stop belt 6 of the gate 2 and the gate groove 3 are evenly pressed and sealed, and the effective bidirectional water retaining function of the gate 2 is realized; meanwhile, the gate stiffening device 1 can operate the swing screw 14 only through the driving mechanism 16, and the gate 2 can be opened and closed through the threaded matching of the swing screw 14 and the swing nut 15, so that the gate stiffening device 1 has the characteristics of simple structure, low manufacturing cost, convenience in operation and bidirectional water stopping function.
In addition, the embodiment of the present application also provides a bidirectional water gate using the gate stiffening device 1, as shown in fig. 3, 4 and 5, the bidirectional water gate includes a gate 2 and gate stiffening devices 1 installed at both ends of the gate; the gate 2 and the gate stiffening device 1 are arranged in the gate groove 3, the gate groove 3 is enclosed by a gate bottom 4 and gate piers 5 positioned on two sides of the top of the gate bottom, the gate groove 3 is arranged on the inner side of the gate piers 5 and positioned on the upper part of the gate bottom 4, and water stop belts 6 are arranged at the end parts of the gate 2 on the inner side of the gate groove 3; the gate stiffening device 1 is positioned between the gate slot 3 and the gate 2 during operation to form an inner support of the gate 2, so that a water stop belt 6 arranged on the gate 2 is pressed to be tightly attached to the gate slot 3, and bidirectional water stop is ensured.
The gate stiffening device 1 can be fixedly connected with the gate 2 into an integral structure or a split structure; when the gate 2 is opened, the gate stiffening means 1 can be lifted integrally with the gate 2 so that they are separated from the gate groove 3. The gate 2 may be a single plane gate or a plurality of stoplog gates.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A gate stiffening device for a bidirectional water retaining gate is characterized by comprising a first vertical supporting piece, a second vertical supporting piece, a connecting piece, a swinging screw rod, a swinging nut and a driving mechanism;
the first vertical support and the second vertical support are arranged in parallel;
the top of the first vertical supporting piece is hinged with the swing nut;
the swing screw is in threaded fit with the swing nut;
the top end of the swing screw is fixedly provided with a driving mechanism, and the bottom end of the swing screw is rotatably arranged at the top of the second vertical supporting piece;
one end of the connecting piece is hinged on the first vertical supporting piece, and the other end of the connecting piece is hinged on the second vertical supporting piece.
2. The gate stiffening device according to claim 1, wherein a top of the second vertical support is provided with a screw-trough assembly for mounting the oscillating screw;
the swing screw is mounted on the second vertical support through the screw and groove assembly.
3. The gate stiffener of claim 2, wherein the connector has first and second oppositely disposed ends;
the first end part is arranged on the first vertical supporting piece through a pin shaft;
the second end is mounted to the second vertical support member by a pin.
4. A gate stiffening device according to claim 3, wherein the connecting member is a connecting plate or rod, the first end portion and the second end portion each being provided with a through hole.
5. The gate stiffening device according to claim 4, wherein the first and second vertical supports are solid or hollow structures.
6. The gate stiffening device according to claim 5, wherein the first vertical support and the second vertical support are both square or rectangular tubes.
7. The gate stiffening device of claim 6 wherein the first vertical support and the second vertical support are each made of a stainless steel or aluminum alloy material.
8. The gate stiffening device according to any one of claims 1 to 7 wherein the drive mechanism is a manual drive mechanism or a powered drive mechanism.
9. The gate stiffening device of claim 8 wherein the drive mechanism is a hand wheel.
10. The gate stiffening device of claim 8 wherein the drive mechanism is a gear motor.
CN201910881737.1A 2019-09-18 2019-09-18 Gate stiffening device for bidirectional water retaining gate Active CN110593217B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910881737.1A CN110593217B (en) 2019-09-18 2019-09-18 Gate stiffening device for bidirectional water retaining gate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910881737.1A CN110593217B (en) 2019-09-18 2019-09-18 Gate stiffening device for bidirectional water retaining gate

Publications (2)

Publication Number Publication Date
CN110593217A true CN110593217A (en) 2019-12-20
CN110593217B CN110593217B (en) 2024-07-16

Family

ID=68860783

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910881737.1A Active CN110593217B (en) 2019-09-18 2019-09-18 Gate stiffening device for bidirectional water retaining gate

Country Status (1)

Country Link
CN (1) CN110593217B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6604889B1 (en) * 2000-02-03 2003-08-12 Jeffrey A. Wood Sluice gate wall thimble
CN103966984A (en) * 2013-01-29 2014-08-06 上海市政工程设计研究总院(集团)有限公司 Lever-type drive underlying gate
CN104141288A (en) * 2014-07-31 2014-11-12 天津大学 Simple inhaul-cable type ship lock
CN105421976A (en) * 2015-11-05 2016-03-23 中国建筑标准设计研究院有限公司 Buried turning plate type water stop gate
CN210827377U (en) * 2019-09-18 2020-06-23 中铁第五勘察设计院集团有限公司 Gate stiffening device for bidirectional water retaining gate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6604889B1 (en) * 2000-02-03 2003-08-12 Jeffrey A. Wood Sluice gate wall thimble
CN103966984A (en) * 2013-01-29 2014-08-06 上海市政工程设计研究总院(集团)有限公司 Lever-type drive underlying gate
CN104141288A (en) * 2014-07-31 2014-11-12 天津大学 Simple inhaul-cable type ship lock
CN105421976A (en) * 2015-11-05 2016-03-23 中国建筑标准设计研究院有限公司 Buried turning plate type water stop gate
CN210827377U (en) * 2019-09-18 2020-06-23 中铁第五勘察设计院集团有限公司 Gate stiffening device for bidirectional water retaining gate

Also Published As

Publication number Publication date
CN110593217B (en) 2024-07-16

Similar Documents

Publication Publication Date Title
CN210562037U (en) Lifting gate for hydraulic engineering
DE69613082T2 (en) Device for opening and closing pivoting windows
CN210827377U (en) Gate stiffening device for bidirectional water retaining gate
CN114044300A (en) Hydraulic pipeline support frame for hydraulic engineering
CN210827378U (en) Bidirectional water retaining gate
CN110593217A (en) Gate stiffening device for bidirectional water retaining gate
WO2020178476A1 (en) Horizontal plate pressure filter
CN110593218A (en) Bidirectional water retaining gate
CN216474867U (en) Gate for hydraulic engineering
CN216264216U (en) Pipeline welding set for hydraulic engineering
CN213926147U (en) Porous opening and closing system of steel gate
CN213990415U (en) Outdoor rain-proof symmetrical formula two skylight structures that open door
CN214939879U (en) Gate for water conservancy and hydropower
CN214497413U (en) Gate for hydraulic engineering convenient to adjust
CN214089732U (en) Gate stiffening device and bidirectional water retaining gate
CN209619965U (en) Guiding device based on Hydropower Unit trash rack for water inlet and maintenance door
CN220944686U (en) Rotary pipeline rust removal equipment for hydraulic engineering
CN211230134U (en) Electric and manual opening and closing shutter
CN210341834U (en) Gate for hydraulic engineering
CN218263755U (en) Hydraulic engineering is with opening and close gate
CN206095271U (en) A movable type binds, sealing structure for acoustics experimental apparatus
CN216428181U (en) Hydraulic and hydroelectric engineering's cast iron gate
CN216405325U (en) Hydraulic transmission intelligent integrated gate
CN216474331U (en) Municipal administration road surface drainage device
CN216586425U (en) Over-and-under type water sluicegate for hydraulic engineering

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant