CN115821861A - Height-adjustable weir dam system suitable for seasonal river channel - Google Patents

Abstract

The invention discloses a height-adjustable barrage system suitable for seasonal river courses. A groove is arranged on the foundation of the concrete dam, a fiberglass dam is arranged in the groove, and an elastic rubber seal is arranged on the fiberglass dam; a limited height device is arranged to limit The height position of the FRP dam; the control pump room of the barrage control system is equipped with a pipeline pump, the water inlet end of the pipeline pump is connected with the water collection well, and the lifting pipe of the pipeline pump at the rear end passes into the lower end of the groove through the water distribution main pipe, beyond The pipes are connected to the water inlet pipe and the water outlet pipe; the support arm of the rotary locking device rotates to the direction perpendicular to the short side of the FRP dam, and is supported on the triangular wedge on the short side. In the weir and dam system of the present invention, the height of the glass-steel dam can be adjusted conveniently. During the seasonal dry season, the water storage of the river can be carried out by lifting the glass-steel dam, and the water storage depth can be adjusted; the water can be replenished from the upstream of the dam to the downstream and the dam can be adjusted through the overriding pipe. The front water depth; can also realize upstream to downstream replenishment through dam overflow.

Description

Height-adjustable barrage system for seasonal channels

technical field

The invention relates to the technical field of civil engineering and water conservancy engineering for water replenishment of river courses, and in particular to a height-adjustable barrage system suitable for seasonal river courses.

Background technique

Seasonal river course means that due to the obvious seasonal characteristics of rainfall in the river basin, it is divided into obvious dry season and rainy season, and the river also has obvious seasonal characteristics, which are manifested as wet season and dry season. During the wet season, the water volume of the river is large, and the flood pressure of the river channel is relatively high, and the water volume of the river channel is much greater than the ecological base flow, which can meet the needs of the river ecosystem and landscape water; while in the dry season, the water volume of the river channel is significantly reduced, or even cut off. When it is less than the ecological base flow, the river ecosystem will be destroyed. At the same time, the above-mentioned characteristics also exist for source-type channels and small tributaries with small river basin areas.

In order to keep the water volume of the seasonal river channel not lower than the ecological base flow of the river channel during the dry season, the current common practice is long-distance water transfer, municipal water replenishment or building dams to store water. Long-distance water transfer requires the construction of booster pump stations and long-distance water pipelines, and the construction costs and later operating costs are relatively high; municipal water replenishment is to return long-distance transported and treated river water or groundwater to the river, which is undoubtedly a kind of It is a costly way of replenishing water; and the construction of traditional dams has a huge impact on the flood discharge function of the river due to the reduction of the river section.

For this reason, the technical field needs a kind of height-adjustable barrage system, to overcome above-mentioned defect.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a height-adjustable barrage system suitable for seasonal river courses, which does not affect the river flood function, and can reduce construction investment and operating costs; in addition, The dam also has a traffic function, which is very suitable for creating a hydrophilic space in the river.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A height-adjustable barrage system suitable for seasonal rivers, including a concrete dam foundation, characterized in that a groove is arranged in the middle of the concrete dam foundation, and a fiberglass dam that can move up and down is arranged in the groove, and the fiberglass dam It is a hollow rectangular structure (cuboid dam) made of glass fiber reinforced plastic. The sides on the left and right sides are matched with the corresponding sides of the groove respectively. The elastic rubber seal seals the gap between the FRP dam and the concrete dam foundation; at the upper end of the groove of the concrete dam foundation, a limited height device is set to limit the height of the FRP dam;

It also includes a barrage control system, the control pump room of the barrage control system is set near the foundation of the concrete dam, at least one pipeline pump is arranged in the control pump room, the water inlet end of the pipeline pump is connected to the water inlet pipe, and the inlet pipe of the water inlet pipe The water end is connected with the water collection well set in front of the dam body. When the pipeline pump is started, the water in the water collection well flows into the pipeline pump pipe through the water inlet pipe; the lower end of

The control pump room is equipped with an overrunning pipe connecting the water inlet pipe and the water outlet pipe, and an electric flow regulating valve is installed on the overrunning pipe;

It also includes a rotating locking device, which is installed on both sides of the short side of the groove, mainly including a handle, a rotating shaft and a support arm, and the handle arranged on the top of the rotating shaft drives the rotating shaft to rotate, and then drives the supporting shaft connected The arm rotates, and the support arm is rotated to the direction perpendicular to the short side of the FRP dam, and supported on the triangular wedge on the short side of the FRP dam.

In this way, in the height-adjustable weir dam system of the present invention, the height of the glass fiber reinforced plastic dam can be adjusted conveniently. In the dry season of the seasonal river, by lifting the glass fiber reinforced plastic dam, the river is stored to maintain the ecological base flow of the river and the water used for the river landscape; The height can adjust the water storage depth; the upstream of the dam can be used to replenish water to the downstream and the water depth in front of the dam can be adjusted through the overflow pipe; the upstream to the downstream can also be used to replenish water through the overflow of the dam.

Further, on both sides of the groove, stainless steel backing plates are respectively arranged, and the stainless steel backing plates are made into concave chute, so that the glass fiber reinforced plastic dam fitted in the concave chute can slide up and down in the concave chute. This can greatly reduce sliding resistance, improve sliding sensitivity and prolong service life

Further, an elastic rubber seal is provided on the long side and the short side of the FRP dam, and the size of the gap between the elastic rubber seal and the side wall of the groove in contact is adjusted by rotating the fastening bolt. Like this, can play the excellent sealing effect of fiberglass dam and groove by elastic rubber seal, prevent water storage from leaking.

Further, the main water distribution pipe is connected to the outlet pipe through a pipe with an electric gate valve, and the water in the groove is output by opening the electric gate valve. In this way, the main water distribution pipe has the function of two-way water delivery, that is, it can input water with relatively high pressure into the groove, and can also transport the water in the groove (water storage in the dam body) outward through the outlet pipe.

Further, multiple groups of water distribution standpipes are set on the water distribution main pipe, and water caps are set on the top of the water distribution standpipes.

The water cap leads water into the groove. In this way, a water flow with relatively high pressure (impact force) can be formed, and the impact force of the water flow acts evenly on the FRP dam body.

Further, multiple horizontal water distribution branch pipes are set on the main water distribution pipe, and the vertical water distribution risers pass through the corresponding

The connected water distribution branch pipe is then connected to the water distribution main pipe. In this way, the water cap can form a uniform distribution in the groove, and produce a uniform impact force to act on the glass fiber reinforced plastic dam body. Moreover, when draining outwards, sediments such as sediment can be discharged as soon as possible.

Further, there are two pipeline pumps arranged in parallel. The two sets are mutually redundant to ensure safe use, and can provide more water volume and impact force.

Further, ribs are arranged inside the hollow structure of the FRP dam. This increases its rigidity and strength.

The rotary clamping device also includes a bearing, a gear plate, a sleeve and a rotating shaft. The upper and lower ends of the rotating shaft are connected to the sleeve through bearings, and a gear plate is installed on the top of the sleeve; the rotating shaft is driven to rotate by turning the handle. , the support arm is fixed on the rotating shaft and rotates together with the rotating shaft; after the handle is rotated to a fixed position, the handle can be stuck in the gear of the gear plate to fix the position of the gear plate.

Compared with the prior art, the present invention has the following beneficial effects:

1. The height of the FRP dam of the present invention can be adjusted conveniently. During the seasonal dry season of the river, the dam can be lifted to store water in the river, so as to maintain the ecological base flow of the river and water for river landscape. By adjusting the height of the dam, the water storage depth can be adjusted; the upstream of the dam can be used to replenish water to the downstream and the water depth in front of the dam can be adjusted through the overflow pipe; the overflow of the dam can also be used to realize water replenishment from the upstream to the downstream.

2. During the seasonal river flood season or when the river basin encounters heavy rain and there is a flood discharge demand, the dam can be lowered below the river bed elevation to eliminate the impact on the river flood discharge function.

3. At the same time, the dam also has a certain traffic function. Pedestrians can walk to the opposite bank of the river through the dam, which is especially suitable for rivers that need to create a hydrophilic space.

Description of drawings

Fig. 1 is a top view layout diagram of the barrage system of the present invention;

Fig. 2 is a sectional view along A-A direction of Fig. 1;

Fig. 3 is a sectional view along the direction BB of Fig. 1 .

Fig. 4 is the structural front view of the FRP dam (part 3) of the present invention;

Fig. 5 is a schematic diagram of the elastic rubber seal structure of the FRP dam (part 3);

Fig. 6 is the FRP dam of the present invention along the C-C direction sectional view;

Fig. 7 is the right view of Fig. 4;

Fig. 8 is a side view of the FRP dam of the present invention;

Fig. 9 is a schematic diagram of the structure of the rotary clamping device of the present invention.

In the figure, 1. Steps; 2. Height-limiting device; 3. FRP dam; 4. Stainless steel backing plate; Water well; 11. Inlet pipe; 12. Control pump room; 13. Pressure gauge; 14. Rubber soft joint; 15. Pipeline pump; 16. Gate valve; 17. Pipeline pump lift pipe; 18. Check valve; 19. Overrunning pipe ;20. Electric flow regulating valve; 21. Electric gate valve; 22. Safety relief valve; 23. Sump; 24. Submersible pump; 25. Outlet pipe; 26. Water distribution standpipe; 27. Fastening bolts; Inspection port; 29, rib plate; 30, elastic rubber seal; 31, triangular wedge; 32, handle; 33, bearing; 34, gear plate; 35, sleeve; 36, rotating shaft; 37, supporting arm rotating shaft; 38, supporting Arm; 100, concrete dam foundation; 101, groove.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is absolutely level or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figures 1-9, a height-adjustable barrage system suitable for seasonal rivers includes a concrete dam foundation 100, which is obtained according to the construction process of a river dam, usually reinforced concrete Structure, a groove 101 is reserved (set) in the middle, the groove 101 is usually a rectangular concave structure, and a glass fiber reinforced plastic dam 3 that can move up and down is arranged in the groove 101, and the glass fiber reinforced plastic dam 3 is made of glass fiber reinforced plastic The hollow rectangular structure of the dam shown in the figure is a cuboid structure, and the sides (short sides of the rectangle) on the left and right sides are matched with the corresponding sides of the groove 101, such as in the concrete layer on both sides, or in order to increase the glass fiber reinforced plastic For the flexibility of the dam 3 sliding up and down, stainless steel backing plates 4 are respectively arranged in the concrete layer, and the stainless steel backing plates 4 are made into concave chute, so that the glass fiber reinforced plastic dam 3 that fits in the concave chute can fit in the concave chute. Sliding, reducing the resistance of sliding up and down. The side (the long side of the rectangle) of the lower end of the FRP dam 3 is in contact with the concrete dam foundation 100 and transmits the force. Even if the FRP dam 3 rises to the highest designed position, its lower end is still in contact with the concrete dam foundation 100. The height of the formed overlapping part is determined by the process; in this way, the three sides of the FRP dam 3 transmit the force formed by the hydraulic pressure of the dam water storage to the concrete layer of the concrete concrete dam foundation 100 respectively. The glass fiber reinforced plastic dam 3 is made of light weight fiberglass with high strength and corrosion resistance, and adopts a hollow cuboid structure to reduce the weight of the dam and increase its buoyancy; the hollow structure of the fiberglass dam 3 is provided with ribs 29, To strengthen the structural strength of the dam; at least one elastic rubber seal 30 and fastening bolt 27 are arranged on the FRP dam 3, and an elastic rubber seal 30 is respectively arranged on the long side and the short side in the figure, and the elastic rubber seal is adjusted by rotating the fastening bolt 27 The elongation of 30 can seal the gap between the contact position between the FRP dam 3 and the concrete dam foundation 100; Cooperate, support arm 38 can be supported from below after rotating, is used for fixing the position of FRP dam 3, adjusts its height position. The concrete concrete dam foundation 100 is provided with steps 1 on both sides of the river, and pedestrians can walk to the fiberglass dam 3 from the river bank road through the steps 1 .

It also includes a barrage control system. The control pump room 12 of the barrage control system is set at a suitable position near the concrete dam foundation 100, such as a nearby bank. The bottom plate of the control pump room 12 is usually flush with the concrete dam foundation 100 groove bottom plate. At least one pipeline pump 15 is arranged in the control pump room 12, and the pipeline pump 15 can be manually controlled on site or controlled by the start-stop button of the control pump room 12, and the gate valve 16, pressure gauge 13 and rubber soft button for maintenance are installed before and after the pipeline pump 15. Joint 14, check valve 18 and other necessary accessories. The water inlet end of the pipeline pump 15 is connected with the water inlet pipe 11, and the water inlet end of the water inlet pipe 11 is connected with the water collection well 10 arranged in front of the dam body (incoming water direction). When starting the pipeline pump 15, the water in the water collection well 10 The pipeline that can flow into the pipeline pump 15 through the water inlet pipe 11; the pipeline pump lifting pipe 17 at the rear end of the pipeline pump 15 leads into the groove 101, specifically, the water is input into the lower end of the groove 101 through the water distribution main pipe 8 of the water distribution system, or connected The water outlet pipe 25 discharges the water in the pipeline pump 15 to the outside. The check valve 18 installed in the pipe pump lifting pipe 17 is used to prevent the backflow of water in the pipe.

Pipeline pumps 15 shown in the figure are two sets arranged in parallel, and only one can be opened (the other is standby), and two can also be opened simultaneously to provide more water volume and impact force. When the fiberglass dam 3 needs to be promoted, one pipeline pump is turned on, and the other is for standby, and the groove of the concrete dam foundation 100 is supplied with water through the pipeline pump, and the fiberglass dam 3 is lifted upward under the joint action of buoyancy and water outlet pressure; When dredging the 100 grooves of the concrete dam foundation, two pipeline pumps are turned on at the same time, and the sediment in the grooves is removed by high-speed water flow.

The control pump room 12 is installed with an override pipe 19 connecting the water inlet pipe 11 and the outlet pipe 25, that is, the override pipe 19 is set in parallel with the pipeline pump 15, and the electric flow regulating valve 20 is installed on the override pipe 19, which can be adjusted by adjusting the opening degree of the valve. The water depth in front of the dam. The main water distribution pipe 8 is connected to the outlet pipe 25 through a pipeline with an electric gate valve 21, the water in the groove 101 can be output by opening the electric gate valve 21, and the water in the groove of the dam can be emptied, so that the dam is lowered; There is a safety pressure relief valve 22 to open the pressure relief when the water pressure exceeds the set standard, and the water flowing out of the pressure relief also flows out through the water outlet pipe 25 .

A sump 23 is set in the control pump room 12, and a submersible pump 24 is arranged in the sump 23. When necessary, the submersible pump 24 is started, and the accumulated water is discharged outward through the connected outlet pipe 25, or directly discharged outward. , used to eliminate and control the accumulated water in the pump room. .

Multiple groups of water distribution standpipes 26 are arranged on the main water distribution pipe 8, and a water cap 6 is set on the top of the water distribution riser pipe 26, or a plurality of horizontal water distribution branch pipes 7 are arranged on the water distribution main pipe 8, and the vertical water distribution riser pipes 26 are connected by The water distribution branch pipe 7 is connected to the water distribution main pipe 8 to form a water flow channel, and water is passed into the groove 101 through the water cap 6 . Water cap 6 is arranged on water distribution standpipe 26 tops, and the water flow direction in the water distribution pipeline can be adjusted to downward outlet water, so that the water in the dam groove can be emptied.

At the upper end of the groove 101 of the concrete dam foundation 100, a height limiting device 2 is set to limit the height position of the FRP dam 3. The height limiting device 2 can be installed on the steps of the dam foundation and arranged in layers. The height limiting device 2 can rotate horizontally, and the height limiting device 2 is rotated to one side of the dam groove, and the upper limit on the glass fiber reinforced plastic dam 3 can prevent the glass fiber reinforced plastic dam 3 from continuing to rise under the effects of buoyancy and the like.

It also includes a rotating locking device 5, which is installed on both sides of the short side of the groove 101, mainly including a handle 32, a rotating shaft 36 and a support arm 38, which are arranged on the rotating shaft 36 (shown as the rotating shaft 36 top) the handle 32 drives the rotating shaft 36 to rotate; as shown in the figure, it is composed of a handle 32, a bearing 33, a gear plate 34, a sleeve 35, a rotating shaft 36 and a support arm 38; the handle 32 is fixed on the rotating shaft 36 top, on the rotating shaft 36 Support arms 38 are arranged at intervals along the height direction, and the upper and lower ends of the rotating shaft 36 are connected to the sleeve 35 through bearings 33 , and a gear plate 34 is installed on the top of the sleeve 35 . Drive rotating shaft 36 to rotate by rotating handle 32, can rotate support arm 38 to vertical FRP dam 3 short side direction, be supported on the triangular wedge 31 of short side, allow FRP dam 3 to rise under buoyancy and water impact effect like this, but It can prevent the dam from descending, and when the dam reaches the predetermined height, the glass fiber reinforced plastic dam 3 is fixed at the predetermined height. The rotating handle 21 drives the supporting arm 38 to rotate to the direction parallel to the short side of the dam, disengages from the triangular wedge 31, and the glass fiber reinforced plastic dam 3 is no longer blocked by the supporting arm 38 when descending. The handle 32 can be stuck in the groove of the size disc at the top of the sleeve 35 to fix the position of the handle. The support arm 38 can be rotated upwards, but not downwards. By turning the handle 32, the rotating shaft 36 is driven to rotate, and the support arm 38 is fixed on the rotating shaft 36 and rotates together with the rotating shaft; after the handle 32 is rotated to a fixed position, the handle 32 can be stuck in the gear of the gear plate 34 for fixing the gear plate 34 s position.

Introduction to the working process of the present invention: in the dry season of the river, when it is necessary to lift the FRP dam 3 to a certain height for water storage, firstly, the height limiting device 2 installed on the corresponding elevation step 1 is rotated to the side of the FRP dam 3, and at the same time, the rotating clamp is rotated position device 5, so that the support arm 38 stretches to the FRP dam 3, then start the pipeline pump 15 (start one) in the control pump room 12, after the river water collected in the sump well 10 is pressurized, it passes through the water inlet pipe 11, pipeline Pump water pipe 17, check valve 18, water distribution main pipe 8, water distribution branch pipe 7, water distribution standpipe 26, and water cap 6 are transported to the groove 101 of the dam. Lift upwards, when reaching predetermined height, FRP dam 3 is blocked by height limiting device 2 and no longer rises, then pipeline pump 15 is closed, and FRP dam 3 is fixed at predetermined elevation under buoyancy and support arm 38 effects. When the instantaneous starting pressure of the pipeline pump 15 is too high, the safety pressure relief valve 22 automatically starts pressure relief.

When it is necessary to adjust the water depth in front of the dam, the electric flow regulating valve 20 can be opened, so that the upstream river water of the dam flows through the water collecting well 10, the water inlet pipe 11, the transcending pipe 19, the electric flow regulating valve 20, and the outlet pipe 25 to flow into the downstream of the dam. Adjusting the opening degree of the electric flow regulating valve can control the size of the water flow, thereby controlling the water depth in front of the dam.

When the groove of the dam needs to be dredged, firstly, the height limiting device 2 is rotated to the side of the FRP dam 3, and at the same time, the rotating clamping device 5 is rotated so that the support arm 38 extends toward the FRP dam 3, and then the control pump room 12 is started. Pipeline pumps 15 (starting two) will pressurize the river water collected in the sump well 10, and then lead to the water inlet pipe 11, pipeline pump lift pipe 17, check valve 18, water distribution main pipe 8, water distribution branch pipe 7, water distribution stand The pipe 26 and the water cap 6 are delivered to the groove of the dam foundation 9, and the silt is washed out of the groove of the dam under the action of high-speed water flow.

When the water coming from the upper reaches of the river is small, and the gap between the FRP dam 3 and the stainless steel backing plate 4 needs to be sealed to reduce water loss, the elastic rubber seal 30 and the stainless steel backing plate 4 or concrete can be reduced by turning the fastening bolt 27. The gap between the layers achieves a sealing effect.

During the flood season of the river course, or when the dam needs to be lowered due to heavy rain in the river course, first turn the rotary locking device 5 so that the support arm 38 is parallel to the short side of the FRP dam 3 and no longer supports the FRP dam 3, and then open the electric gate valve 21. The water in the groove of the dam flows through the water cap 6, the water distribution standpipe 26, the water distribution branch pipe 7, the water distribution main pipe 8, the electric gate valve 21, and the water outlet pipe 25 to flow into the downstream channel of the dam, and the FRP dam 3 then descends until the dam The height is equal to the level of the bottom of the river bed.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit the technical solutions. Those skilled in the art should understand that those who modify or replace the technical solutions of the present invention without departing from the present technology The purpose and scope of the scheme should be included in the scope of the claims of the present invention.

Claims (9)

1. A height-adjustable barrage system suitable for seasonal river courses, comprising a concrete dam foundation (100), characterized in that a groove (101) is arranged in the middle of the concrete dam foundation (100), and a groove (101) ) is equipped with a glass fiber reinforced plastic dam (3) that can move up and down. The glass fiber reinforced plastic dam (3) is a hollow rectangular structure made of glass fiber reinforced plastic. The side of the lower end of the dam (3) is in contact with the concrete dam foundation (100) and transmits the force. At least one elastic rubber seal (30) is arranged on the FRP dam (3) to seal the FRP dam (3) and the concrete dam foundation (100) The gap between the contact parts; at the upper end of the groove (101) of the concrete dam foundation (100), a limited height device (2) is set to limit the height position of the FRP dam (3); It also includes a barrage control system, the control pump room (12) of the barrage control system is set near the concrete dam foundation (100), and at least one pipeline pump (15) is arranged in the control pump room (12), the The water inlet end of the pipeline pump (15) is connected to the water inlet pipe (11), and the water inlet end of the water inlet pipe (11) is connected with the water collection well (10) arranged in front of the dam body. The water in the well (10) flows into the pipeline of the pipeline pump (15) through the water inlet pipe (11); the pipeline pump lifting pipe (17) at the rear end of the pipeline pump (15) passes through the water distribution main pipe (8) into the groove (101) the lower end of An override pipe (19) connecting the water inlet pipe (11) and the water outlet pipe (25) is installed in the control pump room (12), and an electric flow regulating valve (20) is installed on the override pipe (19); It also includes a rotating locking device (5), which is installed on both sides of the short side of the groove (101), mainly including a handle (32), a rotating shaft (36) and a supporting arm (38), The handle (32) arranged on the rotating shaft (36) drives the rotating shaft (36) to rotate, and then drives the supporting arm (38) connected on the rotating shaft (36) to rotate, and the supporting arm (38) is rotated to the vertical fiberglass dam (3 ) in the direction of the short side, supported on the triangular wedge (31) on the short side of the FRP dam (3). 2. The height-adjustable barrage system suitable for seasonal river courses according to claim 1, characterized in that, on both sides of the groove (101), stainless steel backing plates (4), stainless steel backing plates (4 ) is made into a concave chute, so that the left and right sides of the glass fiber reinforced plastic dam (3) in the concave chute can slide in the concave chute. 3. The height-adjustable barrage system suitable for seasonal rivers according to claim 2, characterized in that an elastic rubber seal (30) is provided on the long side and the short side of the fiberglass dam (3), and is tightened by rotating Fix the bolt (27) to adjust the size of the gap between the elastic rubber seal (30) and the side wall of the groove in contact. 4. The height-adjustable barrage system suitable for seasonal rivers according to any one of claims 1-3, characterized in that the main water distribution pipe (8) passes through the pipe with the electric gate valve (21) and the outlet pipe ( 25) connection, the water in the groove (101) is output by opening the electric gate valve (21). 5. The height-adjustable barrage system suitable for seasonal rivers according to any one of claims 1-3, characterized in that multiple groups of water distribution risers (26) are arranged on the water distribution main pipe (8), and in the water distribution stand A water cap (6) is arranged on the top of the pipe (26), and water is passed into the groove (101) through the water cap (6). 6. The height-adjustable barrage system suitable for seasonal rivers according to claim 5, characterized in that a plurality of horizontal water distribution branch pipes (7) are arranged on the water distribution main pipe (8), and the vertical water distribution vertical Pipe (26) is connected on the main water distribution pipe (8) again by the connected water distribution branch pipe (7). 7. The height-adjustable barrage system suitable for seasonal river courses according to any one of claims 1-3, characterized in that the pipeline pumps (15) are two and arranged in parallel. 8. The height-adjustable barrage system suitable for seasonal river courses according to any one of claims 1-3, characterized in that ribs (29) are arranged inside the hollow structure of the fiberglass dam (3). 9. The height-adjustable barrage system suitable for seasonal river courses according to any one of claims 1-3, characterized in that the rotary clamping device (5) also includes a bearing (33), a gear plate ( 34), a sleeve (35) and a rotating shaft (36), the upper and lower ends of the rotating shaft (36) are connected to the sleeve (35) through bearings (33), and a gear plate ( 34); by turning the handle (32), the rotating shaft (36) is driven to rotate, the support arm (38) is fixed on the rotating shaft (36), and rotates together with the rotating shaft; after the handle (32) is rotated to a fixed position, the handle (32) can be rotated ) is stuck in the gear of the gear plate (34) to fix the position of the gear plate (34).

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