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CN-122013745-A - Sand blocking curtain hydrodynamic optimization system and method based on active diversion

CN122013745ACN 122013745 ACN122013745 ACN 122013745ACN-122013745-A

Abstract

The invention provides a sand blocking curtain hydrodynamic force optimizing system and a method based on active diversion, which relate to the field of sand blocking curtains, wherein the sand blocking curtain hydrodynamic force optimizing system based on active diversion comprises an inflating device, a negative pressure device, a flexible curtain, a plurality of connecting buoys and fastening pieces, the connecting buoys are connected through traction pipes, the top ends of the flexible curtain are connected to the traction pipes, the bottom ends of the flexible curtain are connected to the fastening pieces, air bags are fixedly sleeved on the connecting buoys, the left side and the right side of the air bag are fixedly communicated with the exhaust piece, the partition plate is fixed in the traction tube, the air charging tube and the negative pressure tube are fixedly inserted in the communication pontoon, the two ends of the air charging tube are communicated with the air charging cavity and the air bag, and the two ends of the negative pressure tube are communicated with the negative pressure cavity and the air bag.

Inventors

  • PAN WENBO
  • HOU ZHIQIANG
  • LI ZE
  • CUI YONGGANG
  • CUI CHENG

Assignees

  • 交通运输部天津水运工程科学研究所

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. The utility model provides a keep off sand curtain hydrodynamic force optimizing system based on initiative water conservancy diversion, its characterized in that, including aerating device, negative pressure device, flexible curtain (1), a plurality of connection flotation pontoon (2) and be used for pull-down to connect fastener (29) of flotation pontoon (2), connect through traction tube (3) between a plurality of connection flotation pontoon (2), flexible curtain (1) top is connected on traction tube (3), and flexible curtain (1) bottom is connected on a plurality of fastener (29), all fixed cover is equipped with gasbag (4) on a plurality of connection flotation pontoon (2), gasbag (4) left and right sides all are fixed the intercommunication and have the exhaust piece, and the output of two exhaust pieces is the mirror image setting about traction tube (3), and the output of two exhaust pieces all is decurrent slope structure, traction tube (3) inside is fixed with the division board, and the separation board separates into relatively independent inflation chamber (5) and negative pressure chamber (6) with traction tube (3), fixed the alternates on the intercommunication flotation tube (7) and negative pressure tube (8), inflation chamber (7) and negative pressure chamber (4) and negative pressure chamber (6) are linked together in inflation chamber (4) and negative pressure device (6), negative pressure chamber (4) are linked together with aerating device both ends (6).
  2. 2. The active diversion-based sand blocking curtain hydrodynamic optimization system according to claim 1, further comprising an aeration pipe (9), wherein the aeration pipe (9) is fixed at the bottom of the flexible curtain (1), and the aeration device is alternatively communicated with the aeration cavity (5) or the aeration pipe (9).
  3. 3. The active diversion based sand screen hydrodynamic optimization system of claim 1 further comprising an auxiliary support structure for providing auxiliary traction to the plurality of connecting pontoons (2).
  4. 4. A sand blocking curtain hydrodynamic force optimizing system based on active diversion according to claim 3, wherein the auxiliary supporting structure comprises a plurality of connecting anchor chains (10) and a plurality of underwater pile foundations (11), the connecting anchor chains (10) are distributed along the extending direction of the flexible curtain (1), the connecting anchor chains (10) are fixed on the flexible curtain (1), the top ends of the connecting anchor chains (10) are fixed on the traction tube (3), and the bottom ends of the connecting anchor chains (10) are fixedly connected with the underwater pile foundations (11) respectively.
  5. 5. A sand blocking curtain hydrodynamic force optimizing system based on active diversion according to claim 3, wherein the auxiliary supporting structure comprises a plurality of connecting anchor chains II (12) and a plurality of underwater pile foundations II (13), the top ends of the connecting anchor chains II (12) are fixed on the traction pipe (3), and the bottom ends of the connecting anchor chains II (12) are fixedly connected with the underwater pile foundations II (13) respectively.
  6. 6. A sand blocking curtain hydrodynamic optimizing system based on active diversion according to claim 3, wherein the auxiliary supporting device comprises a traction pontoon belt (14), a plurality of connecting anchor chain three (15), a plurality of underwater pile foundations three (16) and a plurality of connecting strips (17), one ends of the connecting strips (17) are fixed on the traction pipe (3), the other ends of the connecting strips (17) are fixed on the traction pontoon belt (14), one ends of the connecting anchor chain three (15) are fixed on the traction pontoon belt (14), and the other ends of the connecting anchor chain three (15) are fixedly connected with the underwater pile foundations three (16) respectively.
  7. 7. The active diversion-based sand screen hydrodynamic optimization system of claim 1, further comprising a flexible screen (1) adjustment system, the flexible screen (1) adjustment system comprising: the collecting unit is used for collecting the water flow speed, the water flow direction and the posture and the tension of the flexible curtain (1); The control unit is used for comparing the gesture and the tension of the flexible curtain (1) with preset thresholds and outputting comparison results; the execution unit is used for being connected with the control unit, when the posture and the tension of the flexible curtain (1) are out of the preset threshold value based on the comparison result, the buoyancy of the air bag (4) is regulated through the opening and closing conditions of the air charging device and the negative pressure device so as to change the posture of the flexible curtain (1), and when the posture and the tension of the flexible curtain (1) are in the preset threshold value, the relevant operation is not carried out.
  8. 8. The active diversion-based sand blocking curtain hydrodynamic optimization system according to claim 7, wherein under constant flow, tension generated on the flexible curtain (1) is calculated by hydrostatic pressure, and specifically, under hydrostatic pressure, a curtain body tension calculation formula is: ; Wherein; Is the tension of the flexible curtain; Represents the density of water; representing gravitational acceleration; representing the water level difference at two sides of the curtain body of the flexible curtain; Is the water depth at the side with higher water level.
  9. 9. The active diversion-based sand blocking curtain hydrodynamic optimization system according to claim 8, wherein the fastener (29) is a hall anchor or a counterweight pendant, and when the fastener (29) is a counterweight pendant, under the condition of constant flow, the counterweight pendant is subjected to the action of the tension of the flexible curtain body, the friction force between the counterweight pendant and the water bottom, self gravity and the resultant force of the buoyancy, and based on the force balance in the horizontal direction and the vertical direction, there are: in the form of a formula; a second formula; in addition, the tension T C in the curtain body is equal everywhere along the length direction of the flexible curtain body, there is A third formula; the above formulas one, two and three can be known; ; wherein G S is the resultant force of gravity and buoyancy of the counterweight body, and u is the friction coefficient between the counterweight body and the water bottom; Expressed as the angle made by the bottom of the flexible curtain body and the vertical.
  10. 10. A new method for optimizing the water power of a sand blocking curtain based on active diversion, which is based on the water power optimizing system of the sand blocking curtain based on active diversion as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps: step one, arranging at least one sand blocking curtain hydrodynamic optimization system in a peripheral water area of a region needing to be protected from silt and reduced in silt; the bottom end of the flexible curtain (1) is pulled by the fastening piece (29), the top end of the flexible curtain (1) is pulled by the traction pipe (3), and the traction pipe (3) provides upward tension for the flexible curtain (1) under the action of the plurality of connecting buoys (2) so that the flexible curtain (1) is in an unfolding state in water; When the inclination angle of the flexible curtain (1) needs to be adjusted, closing the exhaust part, inflating or exhausting the air bag (4) through the inflating device or the negative pressure device, changing the buoyancy of the air bag (4), and enabling the connecting pontoon (2) to be in an ascending or descending state in water so as to change the inclination angle of the flexible curtain (1); And fourthly, when dredging the flexible curtain (1), opening an exhaust piece on the left side of the air bag (4), closing the exhaust piece on the right side, inflating the air bag (4) through an inflating device, enabling gas to be ejected from the exhaust piece on the left side after passing through the air bag (4), enabling the air bag (4) to move to the right side by means of reverse acting force generated by the ejected gas, opening the exhaust piece on the right side, closing the exhaust piece on the left side, enabling the gas to be ejected from the exhaust piece on the right side after passing through the air bag (4), enabling the air bag (4) to move to the left side by means of reverse acting force generated by the ejected gas, enabling the flexible curtain (1) to swing left and right through left and right movements of the air bag (4), and achieving the purpose of dredging.

Description

Sand blocking curtain hydrodynamic optimization system and method based on active diversion Technical Field The invention relates to the field of sand blocking curtains, in particular to a sand blocking curtain hydrodynamic optimization system and method based on active diversion. Background The sand blocking curtain is one kind of mechanical wind preventing and sand fixing engineering device for drought and wind sand area and is woven with high density polyethylene, polypropylene and other synthetic material in netted or cloth structure. The core function of the device is to reduce the wind speed by changing the motion structure of the near-surface wind and sand flow, thereby intercepting, depositing and fixing the quicksand. The sand blocking curtains are generally arranged in a certain interval in the upwind direction of facilities needing protection to form an artificial windbreak. When the wind and sand flow passes through the curtain body, the porous structure can effectively divide and consume wind energy, so that the air flow forms a turbulent flow deceleration zone in front of and behind the curtain, and carried sand particles are settled in front of and behind the curtain body due to insufficient kinetic energy. Over time, a natural sand dike is gradually piled up in front of the curtain, and a more stable composite protection system is formed together with the sand blocking curtain. The device has the advantages of quick, flexible and adjustable layout, small ecological interference, industrialized production and the like, is particularly suitable for emergency protection in the early stage of ecologically fragile engineering, or is combined with plant sand fixation as an auxiliary measure to create precious wind, static and soil stable conditions for subsequent vegetation recovery. The protection efficiency mainly depends on parameters such as the porosity of the curtain body, the setting height, the included angle with the dominant wind direction and the like, and the effective protection distance of the curtain body can reach 15 to 20 times of the height through scientific arrangement, so that the curtain body is one of the indispensable practical technologies in the current sand control engineering. The sand blocking curtain in the prior art comprises a pontoon, a curtain and a falling body, the pontoon drives the curtain to be unfolded in a water body, the sand blocking effect is realized, the existing sand blocking flexible curtain cannot be adjusted according to the sand and dust conditions and the river water flow adaptability, the sand blocking effect is unstable, the curtain can only rely on the self strength and the anchoring force to bring huge force to the large waves, the deformation or damage caused by overlarge wind force is extremely easy to occur, in addition, along with the accumulation of sediment, the weight of the curtain is increased, the sand blocking efficiency is reduced, and the aging of curtain materials can be accelerated. Therefore, it is necessary to provide a new active diversion-based sand blocking curtain hydrodynamic optimization system and a method thereof to solve the above technical problems. Disclosure of Invention In order to solve the technical problems, the invention provides a sand blocking curtain hydrodynamic optimization system and a sand blocking curtain hydrodynamic optimization method based on active diversion. The invention provides a sand blocking curtain hydrodynamic force optimizing system based on active diversion, which comprises an air charging device, a negative pressure device, a flexible curtain, a plurality of connecting buoys and fastening pieces for pulling the connecting buoys downwards, wherein the connecting buoys are connected through traction pipes, the top ends of the flexible curtain are connected to the traction pipes, the bottom ends of the flexible curtain are connected to the fastening pieces, air bags are fixedly sleeved on the connecting buoys, air discharging pieces are fixedly communicated on the left side and the right side of each air bag, the output ends of the two air discharging pieces are in mirror image arrangement relative to the traction pipes, the output ends of the two air discharging pieces are in downward inclined structures, a partition plate is fixedly arranged in each traction pipe, the inner cavity of each traction pipe is divided into an air charging cavity and a negative pressure cavity which are relatively independent, the air charging pipes and the negative pressure pipes are fixedly inserted on the connecting buoys, the two ends of each air charging pipe are communicated with the air charging cavity and the air bags, the air charging device is communicated with the air charging cavity, and the negative pressure device is communicated with the negative pressure cavity. Preferably, the device also comprises an aeration pipe, wherein the aeration pipe is fixed at the bottom of the flexible curtain, and