CN103938599A - Adjustable automatic-flood-drainage safety gate suitable for farmland drainage canal - Google Patents
Adjustable automatic-flood-drainage safety gate suitable for farmland drainage canal Download PDFInfo
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- CN103938599A CN103938599A CN201410187370.0A CN201410187370A CN103938599A CN 103938599 A CN103938599 A CN 103938599A CN 201410187370 A CN201410187370 A CN 201410187370A CN 103938599 A CN103938599 A CN 103938599A
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Abstract
The invention discloses an adjustable automatic-flood-drainage safety gate suitable for a farmland drainage canal. The adjustable automatic-flood-drainage safety gate is composed of a gate frame, a gate body, gate opening devices and a gate resetting device. The gate frame comprises gate piers and a transverse beam, and water permeating pipes are installed on the gate piers. The gate body comprises a bottom weir, a movable gate main body, hinges, a transverse lever, supporting rods and adjustable hinges, the bottom weir is connected with the movable gate main body through the hinges, and the supporting rods are connected with the movable gate main body through the adjustable hinges. Each gate opening device comprises a water tank, a balancing weight, an oscillating bar and a support, and the oscillating bars are fixed to the gate piers through rotating shafts. The gate resetting device comprises rollers, roller supports, a reduction gearbox, a hand wheel and pulling ropes, the reduction gearbox is connected with the roller supports through output shafts, and the rollers are connected with the movable gate main body through the pulling ropes. The adjustable automatic-flood-drainage safety gate is suitable for daily water level control over the farmland drainage canal, can be automatically opened to carry out flood drainage when farmland suffers a flood disaster, and is simple in structure, convenient to maintain and easy to implement.
Description
Technical field
The present invention relates to a kind of the adjustable from draining flooded fields safety gate of agriculture drainage ditch that be applicable to, belong to Agricultural Water-Soil Engineering technical field.
Background technology
Agriculture drainage ditch refers to the water channel of auxiliary agricultural drain natural formation or that formed by hand digging, conventionally by the degree of depth some the escape canals different with width, jointly form escape canal network, and jointly regulate the moisture in farmland with together with the irrigation ditch of upstream.Agriculture drainage ditch has following characteristics conventionally: irrigation canals and ditches regular shape, and the degree of depth is more shallow, and level changing amplitude is larger, and has close mass exchange between the agricultural land soil closing on.As the important infrastructure of irrigation and water conservancy, agriculture drainage ditch is that agricultural year stable yields has played the effect escorting, and has important effect for maintaining the development of Agro-ecological System balance and watershed ecosystem health simultaneously.
Agriculture drainage ditch mainly has the function of three aspects:: the one, and stain water drainage function is fallen, and in rainwater more period, the too much ponding in field can be drained by farmland ditch, and farmland can not had by water logging, the 2nd, water storage function, in the season of drought, the moisture retaining in irrigation canals and ditches can be used for supplementing Farmland Water and wane, by farmland underground stable level in suitable scope, the 3rd, the nutriment reducing in farmland runs off and falls oligosaprobic function, at the rainfall initial stage, nutriment in agricultural land soil leaves soil surface with particulate form or solubilised state under rainwash and dissolution, be pooled to gradually in agriculture drainage ditch system, nutriment can be held back absorption by bed mud, the number of mechanisms such as plant absorption and microbial degradation purification are trapped and are fixed in escape canal system, and in soil moisture, spread slowly and get back in farmland and go, can improve the functioning efficiency of nutriment in farmland, also reduced high concentration N simultaneously, the pollution of downstream water body is caused in the too much discharge farmland of phosphorus substance.
In order to give full play to the various functions of agriculture drainage ditch, conventionally mill weir or gate need be set in irrigation canals and ditches.What in the most agriculture drainage ditchs of China, use at present is fixed mill weir or Artificial Control gate.Fixed mill weir adopts concrete, stone etc. to be built into more, and height can not be adjusted, and cannot adjust the water level in escape canal according to the virtual condition in farmland, and obvious in the fixed mill weir of the flooding period phenomenon that blocks water.Artificial Control gate can be adjusted irrigation canals and ditches water level by gate opening, but needs Artificial Control, to the sudden SEA LEVEL VARIATION response of storm period not in time, easily causes crops to be flooded overlong time and causes underproduction loss.In external agricultural drain gate, a large amount of use computers is controlled for this reason, monitoring farmland that can be real-time and the state of escape canal, but construction and running cost are higher.Therefore, develop a kind of simple in structure, can regulate easily irrigation canals and ditches height of water level, and when farmland water level is too high, can automatically open the safety gate draining flooded fields and there is good practical value.
Summary of the invention
For fixed mill weir traditional in agriculture drainage ditch and Artificial Control gate shortcoming in use, the present invention proposes a kind of the adjustable from draining flooded fields safety gate of agriculture drainage ditch that be applicable to, by regulating gate angle of inclination, regulate the water level of water channel, and reach automatic starting gate while setting critical height at irrigation canals and ditches height of water level, to reach the object of quick water drainage.
Technical solution of the present invention:
Be applicable to the adjustable from draining flooded fields a safety gate of agriculture drainage ditch, comprise lock body, gate, gate opening device and gate resetting means.
As preferred version, above-mentioned lock body comprises gate pier and crossbeam, and described gate pier adopts masonry and concreting to form, and bottom is fixed on canal bed, for supporting gate structure and opposing water impact; The upper level of described gate pier is provided with four water-permeable pipes, and four water-permeable pipes are vertical arrangement and run through gate pier, and described crossbeam is fixed on the top of both sides gate pier, and cross section is " work " font, adopts Plate Welding to form.
As preferred version, above-mentioned gate comprises weir, the end, movable gate, hinge, whippletree, support bar and adjustable hinge, and described Di Yan is fixed on bottom in canal bed, and both sides are fixed on gate pier, described movable gate is connected with weir, the end by hinge, can rotate around end weir crest portion; Described movable gate top is symmetrically installed with two adjustable hinge, and described support bar one end is fixed in adjustable hinge, and the other end is connected with whippletree.
As preferred version, above-mentioned adjustable hinge is comprised of stationary magazine creel, hinge rotating shaft, hinge seat and fastening bolt, and described stationary magazine creel can rotate around hinge rotating shaft, and adjustable hinge is fixed on movable gate by hinge seat.
As preferred version, above-mentioned support bar is steel pipe, and insert in the stationary magazine creel of adjustable hinge one end, and fix by fastening bolt, and described support bar can rotate around hinge rotating shaft.
As preferred version, above-mentioned gate opening device comprises water tank, balancing weight, fork and bearing, and described fork one end is connected with water tank, the other end is connected with balancing weight, described fork middle part is provided with rotating shaft, and described rotating shaft is fixed on gate pier, and described fork can rotate around the axis; Described bearing is fixed on gate pier, is positioned at the below of fork, for limiting fork motion and location; Described water tank upper opening, can accept the water being flowed out by water-permeable pipe, and water tank bottom is equipped with the pipe that leaks, and can avoid, because the reasons such as rainfall make water tank internal water accumulation, causing gate maloperation.
As preferred version, above-mentioned fork is T-shape, and its T-shape head is connected with balancing weight, and afterbody is connected with water tank, and described bearing is positioned at the "T"-shaped lower head of fork.
As preferred version, above-mentioned gate resetting means comprises cylinder, rolling stand, reduction box, handwheel and drag-line, described reduction box is fixed on crossbeam, described reduction box has a power shaft and two symmetrical output shafts, on the power shaft of reduction box, be fixed with handwheel, two output shafts of described reduction box are connected with the cylinder of both sides respectively, and described cylinder is fixed on rolling stand, and can rotate around central axis; Described drag-line one end is fixed on the top edge of movable gate, and the other end, on cylinder, can make cylinder rotate by rotating handwheel, thereby drive drag-line movable gate is mentioned or put down.
As preferred version, above-mentioned reduction box is turbine and worm formula structure, makes the landing of the manipulation activities gate that operating personnel's energy is light, and turbine and worm formula reduction box has auto-lock function simultaneously, has guaranteed the safety of operating process.
The beneficial effect that the present invention reaches:
1, weir, the end of the present invention and movable gate fabricated structure, the bed mud that can block in irrigation canals and ditches is not flushed away, maintain the thickness of sediment layer in canal, can can change the dash height of gate by adjusting the inclination angle of movable gate again, control easily retaining in the water channel of farmland height, to adapt to different times crops to the earth's surface in farmland and and the requirement of groundwater table.
2, when escape canal water level reaches the critical groundwater table of setting, gate can be opened automatically, reduced the resistance of gate to current, promoted the quick discharge of ponding in farmland, thereby effectively prevented that because of farmland, being flooded the crop production reduction causing not in time with draining loses.
3, the critical triggering height of water level of gate opening is adjustable, can adapt to variety classes farmland and the eutrophic water at rainfall initial stage be divided to the requirement of retention time, has also reduced high density pollution thing discharge value downstream simultaneously.
4, the present invention adopts complete mechanical trigger architecture, and device is simple, reliable, can be from dynamic response to the sudden rise of storm period farmland water level.
Accompanying drawing explanation
Accompanying drawing 1 is front view of the present invention (gate in not opening).
Accompanying drawing 2 is A-A sectional views of Fig. 1.
Accompanying drawing 3 is front view of the present invention (gate is in openings).
Accompanying drawing 4 is B-B sectional views of Fig. 3.
Accompanying drawing 5 is adjustable hinge structure charts of the present invention.
Accompanying drawing 6 is gate opening structure drawing of device of the present invention.
Accompanying drawing 7 is cisten mechanism figure of the present invention.
In figure 1 is water channel side slope, the 2nd, water-permeable pipe, the 3rd, gate pier, the 4th, crossbeam, the 5th, rolling stand, the 6th, cylinder, the 7th, output shaft, the 8th, handwheel, the 9th, reduction box, the 10th, adjustable hinge, the 11st, support bar, the 12nd, hinge, the 13rd, weir, the end, the 14th, movable gate, the 15th, bearing, the 16th, canal bed, the 17th, water tank, the 18th, rotating shaft, the 19th, balancing weight, the 20th, fork, the 21st, drag-line, the 22nd, whippletree, the 23rd, the water surface in lock, the 24th, water (flow) direction, the 25th, bed mud, the 26th, the outer water surface of lock, the 27th, pipe leaks, the 28th, stationary magazine creel, the 29th, hinge rotating shaft, the 30th, hinge seat, the 31st, fastening bolt.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, technical solution of the present invention is described in further detail, but protection scope of the present invention is not limited to described embodiment.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, be a kind ofly applicable to the adjustable from draining flooded fields safety gate of agriculture drainage ditch, comprise lock body, gate, gate opening device and gate resetting means.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, lock body comprises gate pier 3 and crossbeam 4, and above-mentioned gate pier 3 adopts masonry and concreting to form, and bottom is fixed on canal bed 16, for supporting gate structure and opposing water impact.The upper level of gate pier 3 is provided with four water-permeable pipes 2, the pvc pipe that water-permeable pipe 2 is 8cm for internal diameter, four water-permeable pipes 2 are vertical arrangement and run through gate pier 3, and the axis spacing of adjacent two water-permeable pipes 2 is 20cm, and the axis height of the water-permeable pipe 2 of the top is lower than water channel slope height 40 ~ 50cm.Water-permeable pipe 2 is communicated with lock inner side and outside irrigation canals and ditches.Crossbeam 4 is fixed on the top of both sides gate pier 3, and cross section is " work " font, and sectional dimension is wide * height=20cm * 30cm, adopt the Plate Welding that thickness is 2cm to form, be used for installing gate resetting means, also both sides gate pier 3 be connected, play the effect of stablizing gate structure simultaneously.
Gate comprises weir, the end 13, movable gate 14, whippletree 22, two hinges 12, two support bars 11 and two adjustable hinge 10.The thickness of weir, the end 13 and movable gate 14 is 15cm, adopts the corrosion resistant plate that thickness is 1cm to be welded into hollow structure, middle fill concrete.The bottom on weir, the end 13 is fixed in canal bed 16, and both sides are fixed on gate pier 3, and 13 tops, weir, the end are 20 ~ 30cm to the distance of canal bed 16.Weir, the end 13 not only provides support for the movable gate 14 of top, can also stop the bed mud of upstream to flow out gate, maintains the thickness of sediment layer in escape canal, and reduces the pollution of running off and causing because of bed mud.Movable gate 14 is connected with weir, the end 13 by two hinges 12, and movable gate 14 can rotate around 13 tops, weir, the end.Movable gate 14 tops are symmetrically installed with two adjustable hinge 10.Support bar 11 one end are fixed in adjustable hinge 10, and its permanent position is adjustable, and the other end is connected with whippletree 22, and the length of cross bar 22 is greater than the width of movable gate 14.
As shown in Figure 5, above-mentioned adjustable hinge 10 is comprised of stationary magazine creel 28, hinge rotating shaft 29, hinge seat 30 and fastening bolt 31, and stationary magazine creel 28 can rotate around hinge rotating shaft 29, and the internal diameter of stationary magazine creel 28 is 5cm.Adjustable hinge 10 is fixed on movable gate 14 by hinge seat 30.
The steel pipe that above-mentioned support bar 11 is 4cm for external diameter, insert in the stationary magazine creel 28 of adjustable hinge 10 one end, and fixing by fastening bolt 31, and support bar 11 can rotate around hinge rotating shaft 29.The upper end of two support bars 11 is connected with whippletree 22, and whippletree 22 adopts the steel pipe manufacture that external diameter is 4cm, and its length is greater than the width 20 ~ 30cm of movable gate.
As shown in Figure 6, above-mentioned gate opening device comprises water tank 17, balancing weight 19, fork 20, rotating shaft 18 and bearing 15.
As shown in Figure 7, above-mentioned water tank 17 materials are engineering plastics, upper opening, and bottom is provided with the pipe 27 that leaks, and the bore that leaks is 2cm.
Above-mentioned fork 20 is "T"-shaped structure, and one end is connected with water tank 17, and the other end is connected with balancing weight 19, and fork 20 middle parts are provided with rotating shaft 18, and rotating shaft 18 is fixed on gate pier 3, and fork 20 can 18 rotate around the shaft.
Above-mentioned bearing 15 is positioned at the "T"-shaped lower head of fork 20, and is fixed on gate pier 3, for supporting the rotational angle of fork 20 and restriction fork 20.
Above-mentioned gate resetting means comprises cylinder 6, rolling stand 5, reduction box 9, handwheel 8 and drag-line 21.
Above-mentioned reduction box 9 is fixed on the middle part of crossbeam 4, is turbine and worm formula structure, and speed reducing ratio is 60:1.Reduction box 9 has a power shaft and two symmetrical output shafts 7, and the power shaft end of reduction box 9 tops is provided with handwheel 8, and the output shaft 7 of reduction box 9 both sides is connected with cylinder 6 respectively.Cylinder 6 is steel hollow cylinder, and it is of a size of external diameter * length=30cm * 50cm, and cylinder 6 is arranged on rolling stand and can rotates around central axis.
The top edge of movable gate 14 is fixed in above-mentioned drag-line 21 one end, and the other end, on cylinder 6, can make cylinder 6 rotate by rotating handwheel 8, thereby drive drag-line 21 that movable gate 14 is mentioned or put down.
Above-mentioned reduction box 9 is turbine and worm formula structure, has higher output input torque ratio, makes the landing of the manipulation activities gate 14 that operating personnel's energy is light, and turbine and worm formula reduction box 9 has auto-lock function simultaneously, has guaranteed the safety of operating process.
Operating principle of the present invention: in day-to-day operation, water level in escape canal is lower, in lock, the water surface 23 is lower than the height of minimum water-permeable pipe 2, water in lock can not flow to outside lock by water-permeable pipe 2, water tank 17 is in anhydrous state during this period, fork 20 is compressing support 15 under the effect of balancing weight 19 gravity, whippletree 22 is caught on by fork 20, make movable gate 14 in heeling condition, its angle of inclination can change by adjusting the permanent position of support bar 11 in adjustable hinge 10, thereby changes the dash height of movable gate 14.Because being subject to stopping of weir 13 and movable gate 14 on earth, now inside gate the height of the water surface 23 higher than water surface elevation 26 outside gate, but lower than the overhead height of movable gate 14.The space that unnecessary water can be by movable gate 14 both sides in lock or the top that covers movable gate 14 flow to outside lock, thereby make the water level in canal keep stable.Between storm period, farmland water level goes up fast, when channel water position reaches or during higher than the height of minimum water-permeable pipe 2, the water in lock can flow in the water tank 17 in lock outside by permeable hole 2.Because the caliber of permeable hole 2 is greater than the leak caliber of pipe 27 of water tank 17 bottoms, water tank 17 is filled very soon, fork 20 rotates under the effect of water tank 17 gravity, whippletree 22 is deviate from from the head of fork 20, movable gate 14 is toppled over to gate outside under the effect of self gravitation and hydro-flow thrust, thereby reduced the mistake flow resistance of gate to escape canal, water in lock can be discharged by gate fast, has effectively prevented because of the loss that farmland water level is too high and waterflooding overlong time causes.After water drainage finishes, channel water position drops to minimum water-permeable pipe 2 height belows, water in canal can not enter into water tank 17 by water-permeable pipe, and the water in water tank 17 is discharged by the pipe 27 that leaks of bottom, at the effect draft link 20 of balancing weight 19 gravity, returns to horizontal level.By rotating handwheel 8, can mention the movable gate 14 of having toppled over, and whippletree 22 is caught on by fork 20 again, thereby gate is resetted.
The concrete method of operation: first set the height of water level of gate opening according to the actual conditions in farmland, block respectively all water-permeable pipes 2 lower than this height with rubber stopper.Then by adjusting the permanent position of adjustable hinge 10 on support bar 11, change the angle of inclination of movable gate 14, thereby adjust the daily dash height of gate.After water drainage finishes, by rotating handwheel 8, mention the movable gate 14 of having toppled over, and whippletree 22 is caught on by fork 20 again.Required movable length while needing to loosen drag-line 21 and reserving movable gate to topple over after gate resets, is held by drag-line when preventing that movable gate 14 from toppling over.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (9)
1. be applicable to the adjustable from draining flooded fields a safety gate of agriculture drainage ditch, it is characterized in that: comprise lock body, gate, gate opening device and gate resetting means.
2. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 1, it is characterized in that: described lock body comprises gate pier and crossbeam, described gate pier adopts masonry and concreting to form, bottom is fixed on canal bed, for supporting gate structure and opposing water impact; The upper level of described gate pier is provided with four water-permeable pipes, and four water-permeable pipes are vertical arrangement and run through gate pier, and described crossbeam is fixed on the top of both sides gate pier, and cross section is " work " font, adopts Plate Welding to form.
3. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 1, it is characterized in that: described gate comprises weir, the end, movable gate, hinge, whippletree, support bar and adjustable hinge, described Di Yan is fixed on bottom in canal bed, both sides are fixed on gate pier, described movable gate is connected with weir, the end by hinge, can rotate around end weir crest portion; Described movable gate top is symmetrically installed with two adjustable hinge, and described support bar one end is fixed in adjustable hinge, and the other end is connected with whippletree.
4. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 3, it is characterized in that: described adjustable hinge is comprised of stationary magazine creel, hinge rotating shaft, hinge seat and fastening bolt, described stationary magazine creel can rotate around hinge rotating shaft, and adjustable hinge is fixed on movable gate by hinge seat.
5. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 3, it is characterized in that: described support bar is steel pipe, insert in the stationary magazine creel of adjustable hinge one end, and fix by fastening bolt, and described support bar can rotate around hinge rotating shaft.
6. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 1, it is characterized in that: described gate opening device comprises water tank, balancing weight, fork and bearing, described fork one end is connected with water tank, the other end is connected with balancing weight, described fork middle part is provided with rotating shaft, described rotating shaft is fixed on gate pier, and described fork can rotate around the axis; Described bearing is fixed on gate pier, is positioned at the below of fork, for limiting fork motion and location; Described water tank upper opening, can accept the water being flowed out by water-permeable pipe, and water tank bottom is equipped with the pipe that leaks, and can avoid, because the reasons such as rainfall make water tank internal water accumulation, causing gate maloperation.
7. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 6, it is characterized in that: described fork is T-shape, its T-shape head is connected with balancing weight, and afterbody is connected with water tank, and described bearing is positioned at the "T"-shaped lower head of fork.
8. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 1, it is characterized in that: described gate resetting means comprises cylinder, rolling stand, reduction box, handwheel and drag-line, described reduction box is fixed on crossbeam, described reduction box has a power shaft and two symmetrical output shafts, on the power shaft of reduction box, be fixed with handwheel, two output shafts of described reduction box are connected with the cylinder of both sides respectively, described cylinder is fixed on rolling stand, and can rotate around central axis; Described drag-line one end is fixed on the top edge of movable gate, and the other end, on cylinder, can make cylinder rotate by rotating handwheel, thereby drive drag-line movable gate is mentioned or put down.
9. a kind of be applicable to agriculture drainage ditch adjustable from draining flooded fields safety gate according to claim 1, it is characterized in that: described reduction box is turbine and worm formula structure, make the landing of the manipulation activities gate that operating personnel's energy is light, turbine and worm formula reduction box has auto-lock function simultaneously, has guaranteed the safety of operating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187370.0A CN103938599B (en) | 2014-05-05 | 2014-05-05 | A kind of adjustable safety gate that certainly drains flooded fields being applicable to agriculture drainage ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187370.0A CN103938599B (en) | 2014-05-05 | 2014-05-05 | A kind of adjustable safety gate that certainly drains flooded fields being applicable to agriculture drainage ditch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103938599A true CN103938599A (en) | 2014-07-23 |
| CN103938599B CN103938599B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187370.0A Expired - Fee Related CN103938599B (en) | 2014-05-05 | 2014-05-05 | A kind of adjustable safety gate that certainly drains flooded fields being applicable to agriculture drainage ditch |
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| CN (1) | CN103938599B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049084A (en) * | 2020-09-18 | 2020-12-08 | 王孟伟 | Fast assembly movable dam capable of playing mutual supporting role |
| CN114606913A (en) * | 2022-03-16 | 2022-06-10 | 山东省调水工程运行维护中心 | Water conservancy dispatch control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2704612Y (en) * | 2003-12-22 | 2005-06-15 | 中国水利水电科学研究院 | Automatic pipeline billow irrigating controller |
| CN1644023A (en) * | 2005-01-18 | 2005-07-27 | 河海大学 | Automatic starting gate with draining control in agricultural field |
| CN201962655U (en) * | 2010-10-14 | 2011-09-07 | 中国水利水电科学研究院 | Check dam drainage structure for sloping land irrigation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1684410A1 (en) * | 1988-08-16 | 1991-10-15 | Институт гидромеханики АН УССР | Valve for the open adjusting construction |
-
2014
- 2014-05-05 CN CN201410187370.0A patent/CN103938599B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2704612Y (en) * | 2003-12-22 | 2005-06-15 | 中国水利水电科学研究院 | Automatic pipeline billow irrigating controller |
| CN1644023A (en) * | 2005-01-18 | 2005-07-27 | 河海大学 | Automatic starting gate with draining control in agricultural field |
| CN201962655U (en) * | 2010-10-14 | 2011-09-07 | 中国水利水电科学研究院 | Check dam drainage structure for sloping land irrigation system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049084A (en) * | 2020-09-18 | 2020-12-08 | 王孟伟 | Fast assembly movable dam capable of playing mutual supporting role |
| CN112049084B (en) * | 2020-09-18 | 2022-07-19 | 王孟伟 | Assembling movable dam capable of supporting each other |
| CN114606913A (en) * | 2022-03-16 | 2022-06-10 | 山东省调水工程运行维护中心 | Water conservancy dispatch control system |
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| CN103938599B (en) | 2016-08-17 |
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