Labyrinth weir desilting structure and labyrinth weir

Abstract

The embodiment of the utility model provides a labyrinth weir desilting structure and a labyrinth weir, and relates to the technical field of labyrinth weirs. The labyrinth weir desilting structure comprises a labyrinth weir body, a water inlet steel pipe is arranged on the upstream of the bent position of the labyrinth weir body, a water outlet steel pipe is arranged on the downstream of the bent position of the labyrinth weir body, a bent connecting steel pipe is connected between the water inlet steel pipe and the water outlet steel pipe, and an inner pipe is arranged in the connecting steel pipe. The streamline rectangular section steel pipe is arranged at the bending part of the labyrinth weir main body, so that the upstream of the water inlet steel pipe is provided with the horizontal inlet, the elevation of the horizontal inlet is close to the weir bottom of the labyrinth weir, the downstream of the water inlet steel pipe is provided with the water outlet steel pipe with the horizontal outlet, and the elevation of the water outlet steel pipe is lower than that of the water inlet steel pipe according to the siphon principle. The negative pressure generated at the outlet is fully utilized during drainage, so that silt can be effectively controlled, the water storage capacity is improved, and the inner pipe with the smooth inner wall is utilized, so that friction during flowing of water flow is reduced, the water flow speed is increased, and the connecting steel pipe is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of labyrinth weirs, in particular to a labyrinth weir sand discharge structure and a labyrinth weir. Background Art

[0002] As a practical and efficient special shape, the maze weir can greatly improve the storage capacity and flow capacity of key projects such as reservoirs and hydropower stations. It is particularly suitable for discharge structures with limited discharge width and the need to improve the reservoir's flood storage capacity and discharge capacity.

[0003] Chinese patent publication number: CN212506135U discloses a labyrinth weir, which includes a retaining wall, wherein the retaining wall is installed close to the upstream water flow and a protective layer covering the surface of the retaining wall. The utility model has the effect of forming a certain protection for the surface of the labyrinth weir and reducing the damage to the surface of the labyrinth weir.

[0004] It can be seen that in the prior art, the walls of the maze weir are protected by setting a protective layer. Although this extends the service life of the maze weir, it has not made any progress in controlling the water flow. When the maze weir is built in a canal, it is easy for sediment to flow with the water in the canal. If the sediment discharge is reduced, the sediment is easy to accumulate and gradually form a sediment pile. Utility Model Content

[0005] The utility model aims to provide a labyrinth weir sand discharge structure and a labyrinth weir, which can prevent the water flow from carrying mud and sand to form mud and sand piles in the labyrinth weir. To this end, a labyrinth weir sand discharge structure and a labyrinth weir are proposed.

[0006] To achieve the above-mentioned objectives, on the one hand, the present application provides a labyrinth weir sand discharge structure, comprising a labyrinth weir main body, an inlet steel pipe is arranged upstream of the bending part of the labyrinth weir main body, an outlet steel pipe is arranged downstream of the bending part of the labyrinth weir main body, a curved connecting steel pipe is connected between the inlet steel pipe and the outlet steel pipe, and an inner pipe is arranged inside the connecting steel pipe.

[0007] In a specific implementation manner, the position of the water inlet steel pipe is higher than that of the water outlet steel pipe, and both the water inlet steel pipe and the water outlet steel pipe have rectangular cross-sections.

[0008] In a specific implementation manner, a filter screen is provided at one end of the inner tube located at one end of the water inlet steel pipe.

[0009] In a specific implementation manner, both sides of the water inlet steel pipe are connected to the labyrinth weir body through auxiliary plates.

[0010] In a specific implementation manner, both sides of the water inlet steel pipe are connected with vertical plates by bolts, and a fixing piece is arranged between the two vertical plates.

[0011] In a specific embodiment, a plurality of gusset plates are provided on one side of the vertical plate, and the gusset plates are used to fix the filter screen.

[0012] In a specific implementation, the fixing piece is fixed to the upper end of the fixing rod, the fixing rod is a hollow structure, a plurality of sliding holes are opened at the lower end of the fixing rod, an extension tube is arranged inside the sliding hole, and an insertion rod is slidably arranged inside the extension tube.

[0013] In a specific implementation manner, a moving rod is slidably arranged inside the fixed rod, an arc plate is arranged at the lower end of the moving rod, and the lower end of the arc plate is fitted with one end of the insertion rod.

[0014] In a specific implementation manner, a moving rod is slidably arranged inside the fixed rod, an arc plate is arranged at the lower end of the moving rod, and the lower end of the arc plate is fitted with one end of the insertion rod.

[0015] In a specific embodiment, on the other hand, the present application also provides a labyrinth weir of a labyrinth weir sand discharge structure, comprising the labyrinth weir sand discharge structure described in any one of the above, comprising a labyrinth weir body, a retaining wall being arranged on the downstream side of the labyrinth weir body, and a plurality of rows of drainage holes being provided on the retaining wall.

[0016] The labyrinth weir sand discharge structure and labyrinth weir provided in the embodiment of the utility model have the following advantages compared with the prior art:

[0017] 1. The utility model arranges streamlined rectangular cross-section steel pipes at the bends of the main body of the labyrinth weir, so that a horizontal inlet is provided upstream of the water inlet steel pipe, and its elevation is close to the bottom of the weir of the labyrinth weir, and a water outlet steel pipe with a horizontal outlet is provided downstream. According to the siphon principle, the elevation of the water outlet steel pipe is lower than that of the water inlet steel pipe, and the negative pressure generated at the outlet is fully utilized during discharge, thereby effectively controlling siltation and increasing water storage capacity. By utilizing the inner pipe with a smooth inner wall, the friction of water flow is reduced, the water flow speed is increased, and the blockage of the connecting steel pipe is prevented.

[0018] 2. The utility model filters large impurities in the water flow through the filter net, reduces the blockage of the connecting steel pipe, and uses the fixing rod and the plug rod to be inserted into the soil layer of the water channel, and cooperates with the use of the vertical plate and the buckle rod to improve the stability of the filter net and the water inlet steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 The second schematic diagram of the overall structure of the embodiment of the utility model;

[0022] Figure 3 For the utility model embodiment Figure 2 Structural plan diagram;

[0023] Figure 4 This is a schematic diagram of the main structure of the labyrinth weir in an embodiment of the utility model;

[0024] Figure 5 This is a schematic cross-sectional view of a connecting steel pipe structure according to an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the connecting fixing member, vertical plate, etc. of the embodiment of the utility model;

[0026] Figure 7 This is a schematic plan view of the internal structure of the fixing rod of an embodiment of the utility model;

[0027] Figure 8 For the utility model embodiment Figure 7 Schematic diagram of the structure at point A.

[0028] icon:

[0029] 1. Labyrinth weir body; 2. Retaining wall; 21. Drain hole; 3. Inlet steel pipe; 31. Outlet steel pipe; 32. Connecting steel pipe; 33. Filter screen; 34. Inner pipe; 4. Fixed rod; 41. Moving rod; 42. Arc plate; 43. Extension tube; 44. Insert rod; 45. Spring; 5. Fixing piece; 51. Vertical plate; 52. Buckle plate; 6. Auxiliary plate. DETAILED DESCRIPTION

[0030] In the prior art, the wall of the labyrinth weir is protected by setting a protective layer. Although the service life of the labyrinth weir is extended, no progress has been made in controlling the water flow. When the labyrinth weir is built in a canal, it is easy for silt to flow with the water flow in the canal. If the discharge volume of silt is reduced, the silt is easy to accumulate and gradually form a silt pile. Therefore, after research, a labyrinth weir sand discharge structure and a labyrinth weir are provided. When in use, a streamlined rectangular cross-section steel pipe is arranged at the bend of the labyrinth weir body, so that a horizontal inlet is provided upstream of the water inlet steel pipe, and its elevation is close to the bottom of the weir of the labyrinth weir, and a water outlet steel pipe with a horizontal outlet is provided downstream. According to the siphon principle, the elevation of the water outlet steel pipe is lower than that of the water inlet steel pipe. When discharging, the negative pressure generated at the outlet is fully utilized, so that siltation can be effectively controlled and the water storage capacity can be increased. By using the inner tube with a smooth inner wall, the friction during the flow of water is reduced, the water flow speed is increased, and the connecting steel pipe is prevented from being blocked, thereby solving the above defects.

[0031] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] Please refer to Figures 1 to 8 The embodiment of the utility model provides a labyrinth weir sand discharge structure and a labyrinth weir, comprising a labyrinth weir main body 1, an inlet steel pipe 3 is arranged upstream of the bending part of the labyrinth weir main body 1, an outlet steel pipe 31 is arranged downstream of the bending part of the labyrinth weir main body 1, a curved connecting steel pipe 32 is connected between the inlet steel pipe 3 and the outlet steel pipe 31, wherein the inlet steel pipe 3 and the outlet steel pipe 31 are both of rectangular cross-section, and the inlet steel pipe 3 with a streamlined rectangular cross-section is arranged at the bending part of the labyrinth weir main body 1, a horizontal inlet is arranged upstream of the inlet steel pipe 3, and its elevation is close to the bottom of the weir of the labyrinth weir main body 1, and a water outlet steel pipe 31 with a horizontal outlet is arranged downstream, according to the siphon principle, the position of the inlet steel pipe 3 is higher than the position of the outlet steel pipe 31, so as to make full use of the negative pressure generated at the outlet when discharging, such a design is not only simple and convenient in structure, but also can effectively control siltation and increase the water storage capacity.

[0033] An inner tube 34 is arranged inside the connecting steel tube 32 . The inner wall of the inner tube 34 is smooth, which can reduce the friction between the flowing water and the inner wall of the steel tube, increase the water flow speed, and reduce the blockage inside the connecting steel tube 32 .

[0034] Furthermore, a filter screen 33 is provided at one end of the inner tube 34 located at one end of the water inlet steel pipe 3 , and the filter screen 33 is combined to filter large impurities in the water flow to further prevent the connecting steel pipe 32 from being blocked.

[0035] At the same time, in order to make the installation of the water inlet steel pipe 3 more stable, the two sides of the water inlet steel pipe 3 are connected to the labyrinth weir body 1 through auxiliary plates 6.

[0036] In addition, both sides of the water inlet steel pipe 3 are connected with vertical plates 51 by bolts, a fixing part 5 is arranged between the two vertical plates 51, and a fixing sleeve is arranged on one side of the fixing part 5. The fixing part 5 is fixed to the upper end of the fixing rod 4 through the fixing sleeve, and the fixing rod 4 is inserted into the soil layer in the canal to strengthen the fixation of the water inlet steel pipe 3 and avoid affecting the stability of the water inlet steel pipe 3 when it is impacted by water flow.

[0037] A plurality of buckle plates 52 are disposed on one side of the vertical plate 51 , and the buckle plates 52 are used to fix the filter screen 33 .

[0038] At the same time, the fixed rod 4 is a hollow structure, and a plurality of sliding holes are opened at the lower end of the fixed rod 4. An extension tube 43 is arranged on the inner side of the sliding hole. An insertion rod 44 is slidably arranged in the extension tube 43. A moving rod 41 is slidably arranged in the fixed rod 4. An arc plate 42 is arranged at the lower end of the moving rod 41. The lower end of the arc plate 42 is fitted with one end of the insertion rod 44. When the moving rod 41 is hammered downward, the moving rod 41 moves downward with the arc plate 42. One end of the insertion rod 44 is an arc structure. The arc surface of the upper end of the arc plate 42 is larger than the arc surface of the lower end. Therefore, as the arc plate 42 descends, the insertion rod 44 can be pushed out of the fixed rod 4. After the insertion rod 44 is inserted into the soil layer, the stability of the fixed rod 4 inserted into the soil layer is improved.

[0039] In addition, the insertion rod 44 is connected to the extension tube 43 via a spring 45 to prevent the insertion rod 44 from being separated from the fixing rod 4 .

[0040] On the other hand, the present application also provides a labyrinth weir with a labyrinth weir sand discharge structure, comprising: a labyrinth weir main body 1, a water retaining wall 2 is arranged on the downstream side of the labyrinth weir main body 1, and multiple rows of drainage holes 21 are opened on the water retaining wall 2. The size of the multi-layer drainage holes 21 gradually decreases from top to bottom. The water retaining wall 2 can not only block mud and sand, but also control the flow rate.

[0041] In summary, a labyrinth weir sand discharge structure and a labyrinth weir in an embodiment of the utility model have the following working principles: water flows in through the water inlet steel pipe 3, passes through the connecting steel pipe 32 and is discharged through the water outlet steel pipe 31. Through the elevation difference between the water inlet steel pipe 3 and the water outlet steel pipe 31, and the complete connecting steel pipe 32, combined with the siphon principle, the negative pressure generated at the water outlet steel pipe 31 is fully utilized during discharge, which can effectively control siltation and increase water storage capacity. At the same time, the smooth inner wall of the inner tube 34 accelerates the water flow rate, and the filter net 33 is combined to filter impurities in the water flow to prevent the connecting steel pipe 32 from being blocked.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A labyrinth weir sand discharge structure, comprising a labyrinth weir body (1), characterized in that: An inlet steel pipe (3) is arranged upstream of the bending point of the labyrinth weir body (1), and an outlet steel pipe (31) is arranged downstream of the bending point of the labyrinth weir body (1). A curved connecting steel pipe (32) is connected between the inlet steel pipe (3) and the outlet steel pipe (31), and an inner pipe (34) is arranged inside the connecting steel pipe (32).

2. The labyrinth weir sand discharge structure according to claim 1, characterized in that: The position of the water inlet steel pipe (3) is higher than the position of the water outlet steel pipe (31), and both the water inlet steel pipe (3) and the water outlet steel pipe (31) have rectangular cross-sections.

3. The labyrinth weir sand discharge structure according to claim 2, characterized in that: A filter screen (33) is provided at one end of the inner tube (34) located at one end of the water inlet steel pipe (3).

4. The labyrinth weir sand discharge structure according to claim 3, characterized in that: Both sides of the water inlet steel pipe (3) are connected to the labyrinth weir body (1) via auxiliary plates (6).

5. The labyrinth weir sand discharge structure according to claim 1, characterized in that: Both sides of the water inlet steel pipe (3) are connected with vertical plates (51) by bolts, and a fixing member (5) is arranged between the two vertical plates (51).

6. The labyrinth weir sand discharge structure according to claim 5, characterized in that: A plurality of gusset plates (52) are provided on one side of the vertical plate (51), and the gusset plates (52) are used to fix the filter screen (33).

7. The labyrinth weir sand discharge structure according to claim 6, characterized in that: The fixing member (5) is fixed to the upper end of the fixing rod (4); the fixing rod (4) is a hollow structure; a plurality of sliding holes are provided at the lower end of the fixing rod (4); an extension tube (43) is provided inside the sliding hole; and an insertion rod (44) is slidably provided inside the extension tube (43).

8. The labyrinth weir sand discharge structure according to claim 7, characterized in that: A moving rod (41) is slidably arranged inside the fixed rod (4), an arc plate (42) is arranged at the lower end of the moving rod (41), and the lower end of the arc plate (42) is in contact with one end of the insertion rod (44).

9. The labyrinth weir sand discharge structure according to claim 8, characterized in that: The insertion rod (44) and the extension tube (43) are connected via a spring (45).

10. A labyrinth weir for realizing the labyrinth weir sand discharge structure according to any one of claims 1 to 9, characterized in that: It comprises a labyrinth weir body (1), a water retaining wall (2) is arranged on the downstream side of the labyrinth weir body (1), and a plurality of rows of drainage holes (21) are provided on the water retaining wall (2).

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