CN109372732B - Automatic water pumping device and method in tunnel - Google Patents
Automatic water pumping device and method in tunnel Download PDFInfo
- Publication number
- CN109372732B CN109372732B CN201811089022.4A CN201811089022A CN109372732B CN 109372732 B CN109372732 B CN 109372732B CN 201811089022 A CN201811089022 A CN 201811089022A CN 109372732 B CN109372732 B CN 109372732B
- Authority
- CN
- China
- Prior art keywords
- self
- water
- switch
- double
- locking switch
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 238000005086 pumping Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000725 suspension Substances 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/025—Stopping, starting, unloading or idling control by means of floats
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an automatic water pumping device and method in a tunnel, which comprises a suspension ball, a fulcrum, a lever, a water pumping mechanism, a self-locking switch and a double-control switch, wherein the suspension ball is arranged at one end of the lever, has certain degree of freedom and can lift along with the water level, a contact block is arranged at the other side of the lever, the fulcrum is arranged in the middle of the lever, so that the two ends of the lever are suspended, the self-locking switches are respectively arranged at the upper position and the lower position of the contact block, when the contact block moves up and down along with the lever, the contact block is in contact with one self-locking switch through a first position and is in contact with the other self-locking switch through a second position, the double-control switch is communicated with each self-locking switch.
Description
Technical Field
The invention relates to an automatic water pumping device and method in a tunnel.
Background
In the tunnel construction process, water prevention and drainage are important projects. The tunnel water-proof and drainage follows the principle of 'combination of prevention, blocking, interception and drainage, according to local conditions and comprehensive treatment', and practical and reliable measures are taken to achieve the purposes of reliable water resistance, smooth drainage, economy and reasonability. The accumulated water in the tunnel mainly comes from tunnel gushing water, artificial water and the like, and the influence on the tunnel construction is brought to a certain degree. If ponding is too much, will bring the hindrance for the construction, influence the construction progress. Corresponding organization measures and technical measures should be adopted to eliminate or reduce the adverse effect of accumulated water in the construction process on the engineering.
At present, accumulated water in a water collecting well in a tunnel is mainly monitored by a common manual operation for 24 hours, the water quantity in the water collecting well is monitored in real time, the situation that the tunnel ground is submerged due to excessive accumulated water is avoided, and a large amount of manpower and material resources are occupied. In practical engineering, how to solve the problem safely, intelligently and automatically in order to discharge accumulated water in the water collecting well in time and efficiently is one of the problems to be solved urgently in the automatic construction process.
Disclosure of Invention
The invention provides an automatic water pumping device and method in a tunnel, solves the problem of intelligent and automatic water pumping and draining in the tunnel, saves manpower and material resources, can automatically control water draining in real time, and avoids the problem of low efficiency of manual 24-hour attendance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an automatic pumping device in tunnel, includes suspension ball, fulcrum, lever, pumping mechanism, self-locking switch and two accuse switches, wherein, the suspension ball sets up in the one end of lever, has certain degree of freedom, can follow the water level and go up and down, the opposite side of lever is provided with the contact block, the lever middle part is provided with the fulcrum for the lever both ends are unsettled, the upper and lower position of contact block respectively is provided with a self-locking switch, when the contact block follows the lever and reciprocates, through first position department and a self-locking switch contact, contact with another self-locking switch when the second position department, two accuse switches and every self-locking switch intercommunication to the action of pumping mechanism is controlled according to the condition of switching on.
As a further limitation, the levitating sphere is connected to the lever by a connecting rod.
As a further limitation, the connecting rod passes through a fixing ring which is fixed on the shore of the tunnel, and the connecting rod can move up and down in the fixing ring.
As a further limitation, the number of the fixed rings is at least two, and the fixed rings are concentrically arranged to control the stability of the floating ball when the floating ball ascends and descends, so that the floating ball is kept not to deviate in the moving process and can vertically move up and down.
As a further limitation, the floating ball can float up and down according to the height of the water level of the water tank, the height of the water level can be reflected by the position of the floating ball, and the action of the water pumping mechanism is indirectly controlled through the height of the position of the floating ball.
As a further limitation, the lever rotates clockwise or anticlockwise through the fulcrum, and when the water level rises, the lever drives the contact block to descend to trigger the self-locking switch below the contact block to indirectly control the action of the water pumping mechanism; when the water level descends, the contact block is driven to ascend to trigger the self-locking switch above the contact block to indirectly control the action of the water pumping mechanism.
As a further limitation, the contact block is a trapezoidal block which can rotate along with the up-and-down movement process, and the self-locking switch can be better aligned and triggered.
As a further limitation, one double control switch is arranged above and below the water pumping mechanism, when the upper double control switch is initially at the second position, if the water level rises to a specified position, the lower double control switch is turned to the fourth position through the self-locking switch, and then the double control switch is communicated with the water pumping mechanism; when the water level is lowered to a certain position, the upper double-control switch is turned to the first position through the self-locking switch, the double-control switch is disconnected with the water pumping mechanism at the moment, when the water level is raised to a specified position again, the lower switch is turned to the third position through the self-locking switch, and the double-control switch is communicated with the water pumping mechanism at the moment.
As a further limitation, after the self-locking switch is in butt joint with the contact block, the self-locking switch is extruded by the contact block under the influence of buoyancy, and the self-locking switch is pressed down and rotates to control the double-control switch on one side; when the same self-locking switch is extruded by the contact block again, the self-locking switch can be automatically popped out from the original pressing state, and then the double-control switch is driven to turn to the other side.
The working method based on the device comprises the following steps:
an automatic water pumping device is installed, and the initial position of the double-control switch is controlled to ensure that the water pumping mechanism does not work at the moment;
when the water level rises to a specified position, the suspension ball also rises to a corresponding height, the contact block descends through the lever to collide with the lower self-locking switch, the lower self-locking switch is triggered, meanwhile, the double-control switch on the lower side in the control circuit is driven to rotate, and the water pumping mechanism starts to pump water;
continuously pumping water until the water level is lowered to a certain height, the suspension ball is lowered to a corresponding height, the contact block is lifted through the lever to collide with the upper self-locking switch, the upper self-locking switch is triggered, meanwhile, the double-control switch on the upper side in the control circuit is driven to rotate, and the water pumping mechanism stops working;
the water is pumped when the water level rises to the specified height, the water is stopped when the water level rises to the specified height, and the water is started when the water level rises to the specified height again.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention has simple operation, convenient use, low cost and economy;
2) according to the invention, the switch of the water pump can be indirectly controlled by utilizing the effect of buoyancy on the floating ball, and the performance of the double-control switch is ingeniously utilized, so that the switch can be triggered when the water level rises and falls, and manpower and material resources are reduced;
3) when the water level rises but does not reach the specified position, the switch is turned off and does not drain water, and the switch is turned on again to drain water until the specified position, so that intelligent water drainage can be realized, and resources are saved;
4) the invention is safe and efficient, water in the water tank can not overflow when the water tank is unattended, and the water can be automatically drained when the water tank is lifted to a specified position, so that the water level is always kept in a safe range.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the switch of the present invention;
fig. 3 is a flow chart of the present invention.
Wherein: 1. the device comprises a suspension ball, 2, a connecting rod, 3, a fixing ring, 4, a fulcrum, 5, a lever, 6, a trapezoidal block, 7, a self-locking switch, 8, a double-control switch, 9, a power switch, 10, a water pump, 11, a water level, 12 and a water tank;
the specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
As shown in fig. 1, an automatic water pumping device in a tunnel includes: the water pump suspension device comprises a suspension ball 1, a connecting rod 2, a fixing ring 3, a fulcrum 4, a lever 5, a trapezoidal block 6, a self-locking switch 7, a double-control switch 8, a power supply, a water pump 10 and a water tank 12. The suspension ball 1 is positioned on the water surface and can ascend and descend along with the water level; the upper side of the connecting rod 2 is connected with the lever 5, and the lower side is connected with the floating ball 1; the fixed ring 3 is penetrated through by the connecting rod 2; the fulcrum 4 is positioned between the levers 5 and is hinged with the levers 5; the trapezoidal block 6 is positioned at one side of the lever 5 and can move up and down along with the lever 5; the self-locking switches 7 are arranged one above the other and can be connected with the trapezoidal blocks 6; the double control switch 8 is arranged in the control circuit, and the upper part and the lower part of the double control switch are respectively provided with a switch.
The invention has simple structure, convenient operation, intellectualization and automation, improves the control water pumping efficiency and saves resources more simultaneously.
The suspension ball 1 can float up and down according to the height of the water level of the water tank 12, the height of the water level can be reflected by the height of the suspension ball 1, and the water pump 10 can be indirectly controlled to be switched on and off through the height of the position of the suspension ball 1.
The upper side of the connecting rod 2 is hinged with the lever 5, the lower side of the connecting rod is fixedly connected with the suspension ball 1, when the water level is high, the suspension ball 1 drives the connecting rod 2 to ascend, and when the water level is low, the connecting rod 2 is driven to descend.
The number of the fixed rings 3 is 2, so that the stability of the suspension ball 1 during ascending and descending can be controlled, the suspension ball can not deviate in the moving process, and the suspension ball can vertically move up and down.
The fulcrum 4 serves as a basis for movement of the lever 5, and meanwhile, the fulcrum 4 is hinged with the lever 5, so that the movement stability of the lever 5 is guaranteed, and the lever cannot be inclined in the rotating process.
The lever 5 rotates clockwise or anticlockwise through the fulcrum 4, and when the water level rises, the left trapezoid block 6 is driven to descend to trigger the self-locking switch 7 below to indirectly control the switch of the water pump 10; when the water level descends, the left trapezoid block 6 is driven to ascend to trigger the upper self-locking switch 7 to indirectly control the switch of the water pump 10.
The trapezoidal block 6 is shaped like a trapezoid because it rotates during the up-and-down movement, and the trapezoidal block can better level the pair of the self-locking switches 7 and trigger the self-locking switches 7.
After the self-locking switch 7 is in butt joint with the trapezoidal block 6, the self-locking switch 7 is extruded by the trapezoidal block 6 under the influence of right buoyancy, and the self-locking switch 7 is pressed down and is used for controlling a double-control switch 8 at one side in the circuit; when the same self-locking switch 7 is squeezed by the trapezoidal block 6 again, the self-locking switch 7 can be automatically popped out from the original pressed state (similar to the working principle of a ball pen), and then the double-control switch 8 at one side in the control circuit is driven to turn to the other side.
As shown in figure 2, two double control switches 8 are arranged on the upper side and the lower side respectively, when the upper side switch is initially on the ② side, if the water level rises to a specified position, the self-locking switch 7 enables the lower side switch to be turned to ④, the circuit is connected, the water pump 10 starts to work, when the water level drops to a certain position, the self-locking switch 7 enables the upper side switch to be turned to ①, the circuit is disconnected, the water pump 10 stops working, when the water level rises to the specified position again, the self-locking switch 7 enables the lower side switch to be turned to ③, the circuit is connected, the water pump 10 starts to work, and when the water level drops or rises again, the working principle is the same, and the switch combination is one cycle every 4 times.
As shown in fig. 3, the method based on the automatic water pumping device in the tunnel comprises the following steps:
1. firstly, an automatic water pumping device is installed, the initial position of a double-control switch 8 in a control circuit is ②③, the double-control switch is in an open circuit state, and a water pumping pump 10 does not work;
2. when the water level in the water tank 12 rises to a specified position, the suspension ball 1 also rises to a corresponding height, the left trapezoid block 6 descends through the lever 5 to collide with the lower self-locking switch 7, the lower self-locking switch 7 is triggered, meanwhile, the double-control switch 8 on the lower side in the control circuit is driven to rotate to reach ④, the circuit is communicated at the moment, and the water pump 10 starts to work to pump water;
3. the water pump 10 continuously pumps water until the water level in the water tank 12 drops to a certain height, the suspension ball 1 also drops to a corresponding height, the left trapezoidal block 6 rises through the lever 5 to collide with the upper self-locking switch 7, the upper self-locking switch 7 is triggered, meanwhile, the double-control switch 8 on the upper side in the control circuit is driven to rotate to reach ①, the circuit is disconnected at the moment, and the water pump 10 stops working;
4. the water is pumped when the water level rises to the specified height, the water is stopped when the water level rises to the specified height, and the water is started when the water level rises to the specified height again.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. An automatic pumping device in a tunnel is characterized in that: the water pumping device comprises a suspension ball, fulcrums, levers, a water pumping mechanism, self-locking switches and double-control switches, wherein the suspension ball is arranged at one end of each lever, has a certain degree of freedom and can lift along with the water level, a contact block is arranged at the other side of each lever, the fulcrum is arranged in the middle of each lever, so that the two ends of each lever are suspended in the air, the self-locking switches are respectively arranged at the upper position and the lower position of each contact block, when the contact blocks move up and down along with the levers, the contact blocks are in contact with one self-locking switch through a first position and are in contact with the other self-locking switch through a second position, the double-control switches are communicated with the;
the suspension ball is connected with the lever through a connecting rod; the connecting rod penetrates through the fixing ring, the fixing ring is fixed on the bank side of the tunnel, and the connecting rod can move up and down in the fixing ring;
the contact block is a trapezoidal block and can rotate along with the vertical movement process, so that pressure is applied to the self-locking switch better, and the self-locking switch is triggered.
2. The automatic water pumping device in the tunnel according to claim 1, wherein: the number of the fixed rings is at least two, and the fixed rings are concentrically arranged to control the stability of the suspension ball when the suspension ball ascends and descends, keep the suspension ball not to deviate in the movement process and can vertically move up and down.
3. The automatic water pumping device in the tunnel according to claim 1, wherein: the suspension ball can float up and down according to the height of the water level of the water tank, the height of the water level can be reflected by the position of the suspension ball, and the action of the water pumping mechanism is indirectly controlled through the height of the position of the suspension ball.
4. The automatic water pumping device in the tunnel according to claim 1, wherein: the lever rotates clockwise or anticlockwise through a fulcrum, and when the water level rises, the lever drives the contact block to fall to trigger the self-locking switch below the contact block to indirectly control the action of the water pumping mechanism; when the water level descends, the contact block is driven to ascend to trigger the self-locking switch above the contact block to indirectly control the action of the water pumping mechanism.
5. The automatic water pumping device in the tunnel according to claim 1, wherein: the upper double control switch and the lower double control switch are respectively arranged, when the upper double control switch is initially at the second position, if the water level rises to a specified position, the lower double control switch is turned to the fourth position through the self-locking switch, and then the double control switches are communicated with the water pumping mechanism; when the water level is lowered to a certain position, the upper double-control switch is turned to the first position through the self-locking switch, the double-control switch is disconnected with the water pumping mechanism at the moment, when the water level is raised to a specified position again, the lower switch is turned to the third position through the self-locking switch, and the double-control switch is communicated with the water pumping mechanism at the moment.
6. The automatic water pumping device in the tunnel according to claim 1, wherein: after the self-locking switch is in butt joint with the contact block, the self-locking switch is extruded by the contact block under the influence of buoyancy, and the self-locking switch is pressed down and rotates to control the double-control switch on one side; when the same self-locking switch is extruded by the contact block again, the self-locking switch can be automatically popped out from the original pressing state, and then the double-control switch is driven to turn to the other side.
7. The working method of the automatic water pumping device in the tunnel according to any one of claims 1 to 6 is characterized in that: the method comprises the following steps:
an automatic water pumping device is installed, and the initial position of the double-control switch is controlled to ensure that the water pumping mechanism does not work at the moment;
when the water level rises to a specified position, the suspension ball also rises to a corresponding height, the contact block descends through the lever to collide with the lower self-locking switch, the lower self-locking switch is triggered, meanwhile, the double-control switch on the lower side in the control circuit is driven to rotate, and the water pumping mechanism starts to pump water;
continuously pumping water until the water level is lowered to a certain height, the suspension ball is lowered to a corresponding height, the contact block is lifted through the lever to collide with the upper self-locking switch, the upper self-locking switch is triggered, meanwhile, the double-control switch on the upper side in the control circuit is driven to rotate, and the water pumping mechanism stops working;
the water is pumped when the water level rises to the specified height, the water is stopped when the water level rises to the specified height, and the water is started when the water level rises to the specified height again.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811089022.4A CN109372732B (en) | 2018-09-18 | 2018-09-18 | Automatic water pumping device and method in tunnel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811089022.4A CN109372732B (en) | 2018-09-18 | 2018-09-18 | Automatic water pumping device and method in tunnel |
Publications (2)
Publication Number | Publication Date |
---|---|
CN109372732A CN109372732A (en) | 2019-02-22 |
CN109372732B true CN109372732B (en) | 2020-02-11 |
Family
ID=65405170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811089022.4A Expired - Fee Related CN109372732B (en) | 2018-09-18 | 2018-09-18 | Automatic water pumping device and method in tunnel |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109372732B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110030496B (en) * | 2019-04-16 | 2021-06-15 | 贵州大学 | Tunnel drainage pipeline pre-embedded type blockage monitoring system and using method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006086506A2 (en) * | 2005-02-09 | 2006-08-17 | King Wire, Inc. | Activation device for sump pumps |
KR20090124636A (en) * | 2008-05-30 | 2009-12-03 | 최덕진 | Float-switching device of a water pump |
CN202033078U (en) * | 2011-04-22 | 2011-11-09 | 福建铭发水产开发有限公司 | Water well level detection device for functional food |
CN202148924U (en) * | 2011-07-23 | 2012-02-22 | 中铁十二局集团第二工程有限公司 | Automatic water pumping device for tunnel |
CN202833060U (en) * | 2012-04-19 | 2013-03-27 | 白银有色集团股份有限公司 | Automatic water drawing device for basement |
CN103994060A (en) * | 2014-06-02 | 2014-08-20 | 湖南科技学院 | Piston-type full-automatic water pumping controller |
CN205943929U (en) * | 2016-06-20 | 2017-02-08 | 昆明理工大学 | Automatic device of power of drawing water is opened and cut off |
-
2018
- 2018-09-18 CN CN201811089022.4A patent/CN109372732B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN109372732A (en) | 2019-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107574869A (en) | Sponge urban rainwater collection device and its method of work | |
CN109372732B (en) | Automatic water pumping device and method in tunnel | |
CN2161787Y (en) | Vertical brake type float automatic valve | |
CN207405721U (en) | It is a kind of to start the draining valve control device stepped down | |
CN201616029U (en) | Full-automatic liquid level control device | |
CN203444346U (en) | Ball float liquid level controlling device | |
CN110409253B (en) | Rainwater side ditch with filtering and collecting functions | |
CN209103161U (en) | A kind of water-level control apparatus with automatic drainage function | |
CN211900953U (en) | Control cabinet device for pump station | |
CN209654078U (en) | A kind of continuous negative pressure automatic water drainage device | |
CN201828066U (en) | Automatic water replenishing device for solar water heater | |
CN211816642U (en) | Energy-conserving effectual no negative pressure water supply equipment | |
CN200958207Y (en) | Hydraulic liftable dam | |
CN206175187U (en) | Automatic water pumping device | |
CN107190839B (en) | A kind of sponge city rainwater storage device | |
CN220538689U (en) | Automatic pumping device for tunnel sump | |
CN217759162U (en) | Vacuum collector control system | |
CN217651865U (en) | Underground structure that stability is high sluices anti device that floats | |
CN200998614Y (en) | Water-saving type recirculated water automatic controlled non-valve filtering pond device | |
CN2474512Y (en) | Horizontal hydraulic jack of vertical lift | |
CN2479629Y (en) | Automatic controller for overtravel-limit electrical equipment switch | |
CN216195282U (en) | Novel hydraulic flow discarding device | |
CN219930909U (en) | Water conservancy is with sluice that has salvage structure | |
CN204001108U (en) | A kind of drain valve structure | |
CN218373704U (en) | Water conservancy water and electricity gate hoisting device |
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 | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200211 |