CN112726516B - Anti-blocking water delivery culvert and design method thereof - Google Patents
Anti-blocking water delivery culvert and design method thereof Download PDFInfo
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- CN112726516B CN112726516B CN202110020184.8A CN202110020184A CN112726516B CN 112726516 B CN112726516 B CN 112726516B CN 202110020184 A CN202110020184 A CN 202110020184A CN 112726516 B CN112726516 B CN 112726516B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000013461 design Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 11
- 230000007704 transition Effects 0.000 claims description 26
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- 238000011084 recovery Methods 0.000 claims description 15
- 238000005452 bending Methods 0.000 claims description 14
- 238000012937 correction Methods 0.000 claims description 3
- 244000058871 Echinochloa crus-galli Species 0.000 abstract description 9
- 235000015225 Panicum colonum Nutrition 0.000 abstract description 9
- 241000196324 Embryophyta Species 0.000 description 27
- 244000025254 Cannabis sativa Species 0.000 description 9
- 241001113556 Elodea Species 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D43/00—Mowers combined with apparatus performing additional operations while mowing
- A01D43/08—Mowers combined with apparatus performing additional operations while mowing with means for cutting up the mown crop, e.g. forage harvesters
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D44/00—Harvesting of underwater plants, e.g. harvesting of seaweed
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Architecture (AREA)
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Abstract
The invention provides an anti-blocking water delivery culvert, which comprises a culvert body, wherein a bracket is arranged in the culvert body, a rotating shaft is arranged on the bracket, and a mowing blade is arranged on the rotating shaft; the rotating shaft is connected with a driving device for driving the rotating shaft to rotate. According to the anti-blocking water delivery culvert, the driving device drives the rotating shaft to rotate, so that the mowing blades smash water grass passing through the culvert, and the smashed water grass can flow to the downstream through the inside of the culvert, so that the culvert is prevented from being blocked.
Description
Technical Field
The invention relates to the technical field of culverts, in particular to an anti-blocking water delivery culvert and a design method thereof.
Background
The culvert is an important component of many large-scale engineering, is usually arranged below the embankment and is used as a water channel, and upstream river water can smoothly flow from the lower part of the embankment to the downstream by using the culvert. Along with the rapid development of industry, the eutrophication degree of many water bodies is continuously increased, which causes the problem that aquatic plants are flooded in many river channels, and the plants float along with flowing water and easily block the culvert when passing through the water delivery culvert. Especially, when flood season is in progress, a large amount of waterweeds flow down along with flood, culverts are easy to be blocked, and if flood on one side of the embankment cannot smoothly flow to the other side, the flood on the one side of the embankment can seriously threaten the safety of the embankment.
At present, two common modes for preventing the culvert from being blocked by waterweeds are as follows:
One is a manual salvage mode, because the aquatic weed is continuously reproduced and the upstream aquatic weed is continuously floated, the aquatic weed is required to be salvaged frequently by workers, and a great deal of manpower is consumed;
The other is to build the trash remover at the upstream of the water delivery culvert, although the trash remover can clean the waterweed from the river channel to the ground, the waterweed cleaned by the trash remover also needs to be cleaned and transferred by a large amount of manpower, and in addition, the engineering investment can be greatly increased by building the trash remover, and the water area of the river channel can be occupied.
Disclosure of Invention
The invention aims to provide an anti-blocking water delivery culvert capable of automatically treating aquatic weeds so as to reduce the manpower consumption in the aquatic weed treatment process.
The technical scheme of the application is as follows: the anti-blocking water delivery culvert comprises a culvert body, wherein a bracket is arranged in the culvert body, a rotating shaft is arranged on the bracket, and a mowing blade is arranged on the rotating shaft; the rotating shaft is connected with a driving device for driving the rotating shaft to rotate.
Preferably, the support comprises a plurality of support rods, the support rods intersect at one position to form an intersection point, the rotating shaft is arranged on the intersection point, the support rods are arc-shaped on the upstream surface and the downstream surface, and the radius of the arc of the downstream surface is smaller than that of the arc of the upstream surface.
Preferably, a control room is arranged above the culvert body, and a motor is arranged in the control room; the support rod is hollow, so that a cavity is formed in the intersection point, bearings are mounted on two inner walls of the cavity, the rotating shaft is fixed on the intersection point through the bearings, and a first gear is arranged at the position, located between the two bearings, on the rotating shaft; one of the support rods is vertically arranged and extends upwards out of the culvert, and a connecting pipe is connected to the outer side of the culvert and extends to the ground of the control room; the rotary shaft of the motor is provided with a second gear, the second gear is provided with a chain, and one end of the chain, which is not connected with the second gear, passes through the connecting pipe and the corresponding supporting rod and is connected with the first gear.
Preferably, the two ends of the mowing blade are bent towards the upstream surface to form a bending part, and the bending part extends out of the culvert body.
Preferably, the mowing blade is provided with saw teeth.
Preferably, the culvert body comprises an inlet section, a transition section and a cave body section which are sequentially arranged along the advancing direction of water flow, and the inner diameter of the inlet section is larger than that of the cave body section; one end of the transition section is connected with the inlet section, and the other end of the transition section is connected with the cavity section; the support is arranged at the inlet of the inlet section.
Preferably, a recovery net is arranged at the outlet of the tunnel body section.
According to the anti-blocking water delivery culvert, the driving device drives the rotating shaft to rotate, so that the mowing blades smash water grass passing through the culvert, and the smashed water grass can flow to the downstream through the inside of the culvert, so that the culvert is prevented from being blocked. The structure has the following advantages:
1. the aquatic plants do not need to be manually salvaged, the aquatic plants do not need to be cleaned and transferred, and the manpower is saved;
2. The structures such as the bracket, the mowing blade and the like are arranged inside the culvert body, so that the river channel water area space is not occupied;
3. simple structure and low cost.
The other technical scheme of the application is as follows: the design method for the anti-blocking water delivery culvert comprises the following steps:
s1, determining design flow Q Is provided with and culvert bottom plate elevation;
s2, designing the size of the hole section:
The inner diameter r cave body ,r cave body of the primary simulated tunnel body section is more than or equal to 0.5m, and the culvert overflow Q Nuclear is calculated according to the upstream and downstream water level, the design flow Q Is provided with and the culvert bottom plate elevation and the related theory of hydraulics;
If Q Is provided with ≤Q Nuclear ≤1.5·Q Is provided with is adopted, the size of the hole body section adopts the primary r cave body ;
If Q Nuclear <Q Is provided with is determined, increasing r cave body , and re-accounting;
If Q Nuclear ＞1.5·Q Is provided with , reducing r cave body , and re-accounting;
Wherein the length of the hole body section is 5-20 m, the wall thickness is not less than 0.2m, and the material is a reinforced concrete structure;
s3, designing the dimension r Feeding in of the inlet section 1:
calculating r 'by using pi.r cave body 2＝π·r＇2 -n.r' b, wherein n is the number of the supporting rods, b is the maximum width of the supporting rods 11 perpendicular to the water flow direction, and b is more than or equal to 0.1m and less than or equal to 0.5m;
r Feeding in ≥λ·r＇；
λ≥1.05；
Wherein r' is the initial value of r Feeding in , and lambda is the correction coefficient;
s4, designing the size of the transition section 2:
The inner diameters of the two ends of the transition section are matched with the inlet section and the cavity section respectively, so that the inlet section and the cavity section can be in smooth transition, the length of the transition section is more than or equal to 3 times r cave body , the shrinkage angle of the cavity is less than or equal to 10 degrees, and the wall thickness is more than or equal to 0.2m.
Preferably, the step S3 further includes a parameter of designing the mowing blade, wherein the width of the mowing blade is 0.05 m-0.25 m, the length of the bending part is r Feeding in -0.02m, and the bending part extends out of the culvert opening by 0.05 m-0.1 m.
The invention provides a design method of an anti-blocking water delivery culvert, which comprises the following steps: the inner diameter of the inlet section is determined by two formulas of pi.r cave body 2＝π·r＇2 -n.r 'b and r Feeding in > =lambda.r', the two formulas respectively consider the influence of the inner support and the mowing blade on water flow, the effective water passing area of the inlet section can be ensured not to be smaller than the water passing area of the hole section by determining the inner diameter of the inlet section through the two formulas, and the hole section can fully exert the self-overcurrent capacity.
Drawings
FIG. 1 is one of the structural side views of the culvert of the present invention;
FIG. 2 is one of the structural plan views of the culvert of the present invention;
FIG. 3 is a structural upstream view of the culvert of the present invention;
FIG. 4 is a schematic illustration of a inducer support configuration;
FIG. 5 is a schematic cross-sectional view of a support bar;
FIG. 6 is one of the schematic front views of the grass cutting blade;
FIG. 7 is a schematic side view of a grass cutting blade;
FIG. 8 is a schematic cross-sectional view of a grass cutting blade;
FIG. 9 is a second schematic front view of a grass cutting blade;
FIG. 10 is a schematic view of a spindle mounting structure;
FIG. 11 is a schematic view of a gear connection;
FIG. 12 is a second side view of the structure of the culvert of the present invention;
FIG. 13 is a second top view of the structure of the culvert of the present invention;
FIG. 14 is a schematic view of a water weed recovery net structure;
in the figure: inlet section 1, changeover portion 2, shaft section 3, control room 4, motor 5, chain 6, connecting pipe 7, external section 8, recovery net 9, bracing piece 11, mowing blade 12, pivot 13, first gear 14, bearing 15, second gear 51, kink 121.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Embodiment 1, the invention provides an anti-blocking water delivery culvert, referring to fig. 1-3, comprising a culvert body, wherein a bracket is arranged in the culvert body, a rotating shaft 13 is arranged on the bracket, and a mowing blade 12 is arranged on the rotating shaft; the rotating shaft is connected with a driving device for driving the rotating shaft to rotate.
The anti-blocking water delivery culvert drives the rotating shaft to rotate through the driving device, so that the mowing blade breaks up water grass passing through the culvert, and the broken water grass can flow to the downstream through the inside of the culvert, thereby preventing the culvert from being blocked. The structure has the following advantages:
1. the aquatic plants do not need to be manually salvaged, the aquatic plants do not need to be cleaned and transferred, and the manpower is saved;
2. The structures such as the bracket, the mowing blade and the like are arranged inside the culvert body, so that the river channel water area space is not occupied;
3. simple structure and low cost.
As a preferred scheme, see fig. 4 and 5, the support includes a plurality of support rods 11, a plurality of the support rods intersect in a place to form an intersection point, the rotating shaft is arranged on the intersection point, the support rods are all arranged in a circular arc shape on the upstream surface and the downstream surface, and the circular arc radius of the downstream surface is smaller than that of the upstream surface, wherein the number of the support rods is not excessive, the number of the support rods is excessive, the large water blocking effect can be caused by the excessive inner support rods, the number of the inner support rods is preferably 3, and the stability of the three inner support rods is better, the support rods 11 are preferably hollow rods, the hollow rod structure can lighten the weight of the whole support, the pressure of the support to the bottom end of the culvert is favorable for lightening, the upstream surface and the downstream surface are both arranged in a circular arc shape, and the circular arc radius of the downstream surface is smaller than that of the upstream surface, so that water flow can smoothly transit along the circular arc surface when passing through the support, the resistance of the support rods to the water flow is reduced, and the head loss generated when the water flow passes through the support can be reduced. The length of the cross section of the support rod along the flow direction is more than 4 times of the maximum width of the vertical water flow direction. The inner support has a longer length along the water flow direction and a gradually shrinking shape at the tail part, so that the disturbance of the inner support to the water flow state can be reduced, and cavitation erosion is prevented.
For facilitating drainage, see fig. 1,3, 10 and 11, a control room 4 is arranged above the culvert body in the embodiment, and a motor 5 is arranged in the control room, wherein the motor is preferably a bidirectional motor; the supporting rod is hollow, so that a cavity is formed in the intersection point, bearings 15 are arranged on two inner walls of the cavity, the rotating shaft is fixed on the intersection point through the bearings, and a first gear 14 is arranged on the rotating shaft and positioned between the two bearings; one of the support rods is vertically arranged and extends upwards out of the culvert, and a connecting pipe 7 is connected to the outer side of the culvert and extends to the ground of the control room; the motor is characterized in that a second gear 51 is arranged on a rotating shaft of the motor 5, a chain 6 is arranged on the second gear, one end of the chain, which is not connected with the second gear, passes through a connecting pipe and a corresponding supporting rod and is connected with the first gear, the structure enables a driving device to use a motor as a driving device and connect the motor with the rotating shaft in a chain connection mode, the motor is ingeniously arranged outside a culvert by combining a hollow structure of the supporting rod and the connecting rod, and the chain is blocked, so that the blocking of the motor and a connecting piece thereof to water flow is reduced to the greatest extent, and the influence of equipment such as the motor on the flow state of the water flow is prevented; in this embodiment, the motor is generally bulky, and has certain requirement to waterproof, still can avoid directly putting the motor inside the culvert through this design, can guarantee the normal work and the convenient maintenance of motor.
The mowing blade is positioned in the culvert, mainly has a cutting effect on the aquatic weeds entering the culvert, but sometimes the situation that the agglomerated aquatic weeds block the hole outside the culvert occurs, so the applicant designs the following scheme: referring to fig. 6-9, two ends of the mowing blade are bent towards the upstream surface to form a bending part 121, the bending part 121 extends out of the culvert body, and the mowing blade is provided with the bending part and the bending part extends out of the culvert body, so that the externally agglomerated aquatic weed can be cut and then enter the culvert, and the agglomerated aquatic weed is prevented from blocking the culvert hole; in this embodiment, it is preferable to set 3 grass blades from the stability angle, and the contained angle of adjacent grass blades is 120, and grass blade 12 is two-sided and lead to long edging, cooperation bi-directional motor, can effectively prevent pasture and water winding. Further, the grass cutting blade may be designed to be serrated to prevent the aquatic weed from sliding along the grass cutting blade, increasing its effectiveness in cutting aquatic weeds. The shape of the mowing blade can be further optimized according to the hydrodynamic theory, and by adjusting the shape and the angle of the mowing blade, the mowing blade can generate the effect of accelerating the water body to flow into the culvert when rotating, and can also accelerate the water grass cut into small sections to flow downstream.
In practical use, the cut aquatic weed can be used as downstream fish feed or naturally degraded, if the aquatic weed which is not desired to be cut into small sections flows to downstream water areas, referring to fig. 12-14, an external section 8 and a aquatic weed recovery net 9 can be additionally arranged at the tail end of the tunnel section 3, a clamping groove is arranged on the external section 8 and used for fixing the recovery net 9, and after the recovery net 9 collects enough aquatic weed, the recovery net 9 is removed from the clamping groove and replaced. In order to ensure the stability of the external connection section 8, the bottom of the external connection section 8 is provided with a pile foundation, and the top of the pile foundation is fixedly connected with the bottom of the external connection section. The pile foundation can increase the capability of the external section to resist horizontal pulling force, and prevent movement deformation under the drive of the aquatic weed recovery net. With this design, the upstream aquatic weed floats to the inside of the recovery net 10 through the culvert hole after the intake section 1 is cut into small sections. The mesh size of the aquatic weed recovery net 10 is 2cm to 5cm.
As a preferable scheme, the culvert body comprises an inlet section 1, a transition section 2 and a cave body section 3 which are sequentially arranged along the advancing direction of water flow, wherein one culvert project can be provided with 1 section of cave body section or multiple sections of cave body sections, the inner diameter of the inlet section is larger than that of the cave body section, and two ends of the transition section are respectively matched with the inlet section and the cave body section, so that the inlet section and the cave body section are in smooth transition; one end of the transition section is connected with the inlet section, and the other end of the transition section is connected with the cavity section; the support is arranged at the inlet of the inlet section. The size of the inner diameter of the hole section depends on the design flow of the engineering. The water grass treatment equipment is arranged at the inlet section, which occupies a certain flow area in the culvert, so that the inner diameter of the inlet section is increased to ensure enough flow area, and the inner diameter of the inlet section is larger than the inner diameter of the cave body section. Enough overflow area can ensure that the overflow capacity of the hole section reaches the design requirement. The transition section is used for connecting the inlet section and the hole body section, so that water flow is smoothly transited, and a good flow state is maintained.
Embodiment 2, embodiment 2 is a design method of the anti-blocking water delivery culvert, which is characterized by comprising the following steps:
S1, determining a design flow Q Is provided with and a culvert bottom plate elevation, which are well known to those skilled in the art and are not described herein;
s2, firstly, designing the size of a hole section:
The inner diameter r cave body ,r cave body of the primary simulated tunnel body section is more than or equal to 0.5m, and the culvert overflow Q Nuclear is calculated according to the upstream and downstream water level, the design flow Q Is provided with and the culvert bottom plate elevation and the related theory of hydraulics; the calculation of Q Nuclear is well known to those skilled in the art, and will not be described here again;
If Q Is provided with ≤Q Nuclear ≤1.5·Q Is provided with is adopted, the size of the hole body section adopts the primary r cave body ;
If Q Nuclear <Q Is provided with is determined, increasing r cave body , and re-accounting;
if Q Nuclear ＞1.5·Q Is provided with , reducing r cave body , and re-accounting; the three inequalities enable the inner diameter of the cavity section to meet the requirement of design flow, and meanwhile engineering waste caused by overlarge inner diameter is avoided.
The length of the hole body section is 5-20 m, the wall thickness is not less than 0.2m, and the material is reinforced concrete structure.
S3, after the size of the cavity section 3 is determined, the size r Feeding in of the inlet section 1 is designed:
Calculating r ' by using the formula pi.r cave body 2＝π·r＇2 -n.rj ' b, wherein n is the number of the supporting rods 11, b is the maximum width of the supporting rods 11 in the vertical water flow direction, b is more than or equal to 0.1m and less than or equal to 0.5m, and r ' is the initial value of r Feeding in and is the intermediate quantity set for calculating r Feeding in ;
r Feeding in ≥λ·r＇；
λ≥1.05；
Wherein lambda is a correction coefficient related to the number, shape and rotation speed of the mowing knives,
In the scheme, the inner diameter of the inlet section is determined through two formulas of pi.r cave body 2＝π·r＇2 -n.r 'b and r Feeding in not less than lambda.r', the two formulas respectively consider the influence of the inner support and the mowing blade on water flow, the effective water passing area of the inlet section can be ensured not to be smaller than the water passing area of the tunnel body section through the two formulas, and the tunnel body section can fully exert the self-overcurrent capacity.
The length of the inlet section 1 is 5-10 m, the wall thickness is not less than 0.2m, and the material is reinforced concrete structure.
The minimum distance between the support rod and the culvert inlet is 0.2 m-0.5 m.
The width of the mowing blade is 0.05 m-0.25 m, the length of the bending section is r Feeding in -0.02m, and the bending part extends out of the culvert opening by 0.05 m-0.1 m;
S4, after the sizes of the tunnel body section and the inlet section are determined, the size of the transition section 2 is finally designed:
the inner diameters of the two ends of the transition section are matched with the inlet section and the hole body section respectively, so that the inlet section and the hole body section can be in smooth transition, the length of the transition section 2 is more than or equal to 3 times r cave body , the shrinkage angle of the hole body is less than or equal to 10 degrees, and the design ensures that water flow can smoothly flow into the hole body section from the inlet section; the wall thickness of the transition section is more than or equal to 0.2m.
S5, selectively designing an external section 8 and a water grass recovery net 9:
According to the engineering actual need, the external section and the pasture and water recovery net can be selectively arranged. The external section is splayed, the length is 2-10 m, the diffusion angle is 5-10 degrees, and the wall thickness is not less than 0.2m. The net mouth section of the aquatic weed recovery net is matched with the end section of the external section, the length of the aquatic weed recovery net is 5-20 m, and the mesh size is 0.02-0.05 m.
In summary, the invention provides an anti-blocking water delivery culvert and a design method thereof, wherein a mowing blade is arranged in the culvert, so that aquatic plants floating in the culvert and blocking a hole can be cut into small sections, and a cavity and a chain are arranged in an inner support for connection ingeniously, so that motor equipment is placed in a control room on the ground, and the internal space of the culvert is saved. In addition, through adjusting the inner diameter sizes of the pipe joints at different parts of the culvert and optimizing the inner support cross section form, the water flow in the culvert is smooth in transition, the flow state is stable, and the overflow capacity of the culvert body can be fully exerted. The culvert is simple in structural form and design method and easy to popularize.
The foregoing description of the preferred embodiments of the present invention is provided for the purpose of illustration only, and the terms first, second, etc. are used for distinguishing the names, not for limiting the technical terms, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The anti-blocking water delivery culvert comprises a culvert body and is characterized in that a bracket is arranged in the culvert body, a rotating shaft (13) is arranged on the bracket, and a mowing blade (12) is arranged on the rotating shaft;
The rotating shaft is connected with a driving device for driving the rotating shaft to rotate;
The support comprises a plurality of support rods (11), the support rods are intersected at one position to form an intersection point, the rotating shaft is arranged on the intersection point, the support rods are arc-shaped on the upstream surface and the downstream surface, and the radius of the arc of the downstream surface is smaller than that of the arc of the upstream surface;
a control room (4) is arranged above the culvert body, and a motor (5) is arranged in the control room;
The support rod is hollow, so that a cavity is formed in the intersection point, bearings (15) are mounted on two inner walls of the cavity, the rotating shaft is fixed on the intersection point through the bearings, and a first gear (14) is arranged at the position, located between the two bearings, on the rotating shaft;
One of the support rods is vertically arranged and extends upwards out of the culvert, and a connecting pipe (7) is connected to the outer side of the culvert and extends to the ground of the control room;
A second gear (51) is arranged on the rotating shaft of the motor (5), a chain (6) is arranged on the second gear, and one end of the chain, which is not connected with the second gear, passes through the connecting pipe and the corresponding supporting rod and is connected with the first gear.
2. The anti-clogging water delivery culvert of claim 1 wherein two ends of the mowing blade are bent toward the upstream surface to form a bending portion (121), the bending portion (121) extending out of the culvert body.
3. The anti-clogging water delivery culvert of claim 2 wherein the mower blades are provided with serrations.
4. A water culvert with anti-blocking function according to any of claims 1-3, wherein the culvert body comprises an inlet section (1), a transition section (2) and a cave body section (3) which are arranged in sequence along the advancing direction of the water flow, the inner diameter of the inlet section is larger than the inner diameter of the cave body section;
one end of the transition section is connected with the inlet section, and the other end of the transition section is connected with the cavity section;
the support is arranged at the inlet of the inlet section.
5. The anti-clogging water delivery culvert of claim 4 wherein the outlet of the shaft section is provided with a recovery screen (9).
6. The method for designing an anti-clogging water delivery culvert as claimed in claim 4, comprising the steps of:
s1, determining design flow Q Is provided with and culvert bottom plate elevation;
s2, designing the size of the hole section:
The inner diameter r cave body of the primary simulated tunnel body section calculates the culvert overflow Q Nuclear according to the upstream and downstream water level, the design flow Q Is provided with and the culvert bottom plate elevation and the hydraulics related theory;
If Q Is provided with ≤Q Nuclear ≤1.5·Q Is provided with is adopted, the size of the hole body section adopts the primary r cave body ;
If Q Nuclear <Q Is provided with is determined, increasing r cave body , and re-accounting;
If Q Nuclear ＞1.5·Q Is provided with , reducing r cave body , and re-accounting;
S3, designing the size r Feeding in of the inlet section:
Calculating r 'by using pi.r cave body 2=π·r＇2 -n.r' b, wherein n is the number of the supporting rods, and b is the maximum width of the supporting rods (11) perpendicular to the water flow direction;
r Feeding in ≥λ·r＇；
λ≥1.05；
Wherein r' is the initial value of r Feeding in , and lambda is the correction coefficient;
S4, designing the size of a transition section:
The inner diameters of the two ends of the transition section are matched with the inlet section and the cavity section respectively, so that the inlet section and the cavity section can be in smooth transition, the length of the transition section is more than or equal to 3 times r cave body , and the shrinkage angle of the cavity is less than or equal to 10 degrees.
7. The method for designing an anti-clogging water delivery culvert according to claim 6, wherein step S3 further includes a parameter of designing a mowing blade, wherein the mowing blade width is 0.05 m-0.25 m, and the length of the bending portion is not counted as
R Feeding in -0.02m, and the bending part extends out of the culvert opening by 0.05-0.1 m.
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| CN112095702A (en) * | 2020-09-03 | 2020-12-18 | 刘哲 | Dredging device for farmland irrigation water culvert |
| CN214460154U (en) * | 2021-01-07 | 2021-10-22 | 江苏省水利勘测设计研究院有限公司 | Prevent blockking up water delivery culvert |
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| US6499173B2 (en) * | 2000-12-07 | 2002-12-31 | Leslie Van Ornum | Culvert cleaning apparatus |
| CN101849461A (en) * | 2009-03-31 | 2010-10-06 | 王森豹 | Waterweed rotary cutter |
| CN102197799A (en) * | 2010-03-24 | 2011-09-28 | 镇江市万金农机有限公司 | Vertical waterweed rotary lathe |
| CN211665726U (en) * | 2019-12-23 | 2020-10-13 | 高莹 | Grass blocking device for sluice culvert |
| CN111593712A (en) * | 2020-05-27 | 2020-08-28 | 张宽波 | Equipment for cleaning aquatic plants in river channel by using composite blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112095702A (en) * | 2020-09-03 | 2020-12-18 | 刘哲 | Dredging device for farmland irrigation water culvert |
| CN214460154U (en) * | 2021-01-07 | 2021-10-22 | 江苏省水利勘测设计研究院有限公司 | Prevent blockking up water delivery culvert |
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