CN212956419U

CN212956419U - Sand blocking plane gate structure

Info

Publication number: CN212956419U
Application number: CN202021793827.XU
Authority: CN
Inventors: 景来红; 杨顺群; 诸葛梅君
Original assignee: Yellow River Engineering Consulting Co Ltd
Current assignee: Yellow River Engineering Consulting Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-13
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a sand blocking plane gate structure, which comprises a plane gate body, wherein the lower part of the plane gate body is a double-panel box type gate leaf structure, and the height of the double-panel box type gate leaf is greater than the silt burying height; the bottom edge sealing plate of the double-sided board box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-sided board box type door leaf; the bottom edge sealing plate is provided with a circular arc tube groove with a downward opening along the plane gate body in the transverse direction, a vertical tube is arranged in the double-panel box type door leaf and penetrates through a cross beam web plate in the double-panel box type door leaf, a lower tube opening of the vertical tube is communicated with the circular arc tube groove, and an upper tube opening of the vertical tube extends out of the upper part of the plane gate body. The utility model discloses the advantage lies in having solved and having kept off husky plane gate because silt siltation makes the gate lower part produce the problem that the negative pressure influences the gate and opens and close, has reduced the viscous force of unilateral gate panel greatly.

Description

Sand blocking plane gate structure

Technical Field

The utility model relates to a keep off husky plane gate among the hydro-junction engineering especially relates to keep off husky plane gate structure.

Background

Aiming at the characteristics of a river with much silt, a sand blocking plane gate is required to be arranged at the inlet section of a sand discharge hole in order to prevent siltation in the sand discharge hole in the hydraulic junction engineering. However, the influence of silt on the opening and closing force of the gate is not specified in the water conservancy industry standard, and is often determined according to experiments. The test gate is simulated by adopting a steel plate, and the design working conditions are that the single face has silt, so the comprehensive viscous force index of the silt given by the test on the gate panel and the gate slot is difficult to open and close the sand blocking plane gate in the actual engineering operation process, the sand blocking plane gate can be opened or closed usually after the opening and closing of the sand blocking plane gate is ceaselessly performed for several hours, and the reason is rarely explored for years.

In recent years, in order to prolong the service life of the sand blocking reservoir capacity, the reservoir of a sediment-laden river mostly adopts an effective low-level sand discharge mode, namely, silt in a reservoir area is pulled to the front of a gate, the content of the silt in a sand discharge hole is very high in the process of sand discharge of an outlet control gate, so that dozens of centimeters of silt fall off in the sand discharge hole as long as the outlet control gate is closed, the gate of a sand blocking plane is not closed tightly, and the gate of the sand blocking plane cannot be opened when the gate of the sand blocking plane is opened after a period of time, the inspection shows that the whole bottom edge of the gate of the sand blocking plane is buried in the silt (namely, the upper side and the lower side of the bottom edge of the gate of the sand blocking plane are buried in the silt), but not the single side of the gate, and the situation often occurs in a flood season, and an unconventional means is often adopted to lift the gate of the sand blocking plane, thereby bringing.

In addition, in the process of closing the plane gate by moving water or opening the plane gate by moving water, the inclination angle of more than or equal to 30 degrees is set on the downstream side of the bottom edge of the gate blade according to the water conservancy industry standard requirement, and when the inclination angle cannot be met, air supplement measures are required. However, the bottom edge of the gate blade is affected by outlet water flow, and air supplement measures are difficult to find, some air supplement measures adopt that a hole is formed in a web plate of a bottom main beam of the planar gate, air is supplemented through a cavity at the upper part of the bottom beam, but the top of the gate is overflowed and often seals an air inlet channel, so that the bottom edge generates pulsation due to negative pressure to make the gate difficult to open and close, and even the accidents that the gate cannot be closed due to water movement or a steel wire rope is broken occur.

Disclosure of Invention

An object of the utility model is to provide a keep off husky plane gate structure reaches the negative pressure that eliminates the production of keeping off husky plane gate lower part.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model discloses a sand blocking plane gate structure, which comprises a plane gate body, wherein the lower part of the plane gate body is a double-panel box type gate leaf structure, and the height of the double-panel box type gate leaf is greater than the silt burying height; the bottom edge sealing plate of the double-sided board box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-sided board box type door leaf; the upper edge of the bottom edge sealing plate is transversely provided with an arc tube groove with a downward opening along the plane gate body, a plurality of vertical tubes are arranged in the double-panel box type door leaf, each vertical tube penetrates through the cross beam web plate in the double-panel box type door leaf, the lower tube opening of each vertical tube is communicated with the arc tube groove, and the upper tube opening of each vertical tube extends out of the plane gate body.

The diameter of the arc pipe groove is larger than or equal to that of the vertical pipe; the number of the vertical pipes arranged in the double-panel box type door leaf is multiple, the horizontal distance between every two adjacent vertical pipes is 80-110cm, the height of the top of each vertical pipe above the top of the plane gate body is more than or equal to 30cm, and the diameter of each vertical pipe is more than or equal to 20 cm.

The angle of inclination of the bottom edge sealing plate towards the upper part of the downstream side is more than or equal to 30 degrees.

The utility model has the advantages that the reason for the difficulty of opening/closing the panel of the unilateral gate is found out, namely, the silt accumulated on the upper and lower sides of the lower part of the sand blocking plane gate has the characteristic of weak water permeability, so that the negative pressure is generated on the lower part of the sand blocking plane gate, and the silt is the main factor for causing the difficulty of opening/closing the sand blocking plane gate; through experimental tests, the lower suction force generated by the negative pressure existing at the lower part of the gate in the process of opening the gate by standing water, for example, for a gate with the width of 5.4m and the thickness of 1.5m, the lower suction force of a maximum atmospheric pressure of 810kN can be generated, and the influence on the door opening force is great. Therefore, the invention not only solves the problem that the lower part of the gate generates negative pressure to influence the opening and closing of the gate due to silt deposition of the sand blocking plane gate, greatly reduces the viscous force of a single-side gate panel, but also solves the problem of effective air supply measures required when the downstream inclination angles of the accident gate and the working gate cannot meet the requirements. Meanwhile, the sand blocking plane gate structure has no influence on the original gate structure, is simple to process, manufacture and transform, and operates stably, so that the reliability of safe operation of the sand blocking plane gate is improved, the opening/closing force of the sand blocking plane gate is reduced, and the equipment investment of opening/closing the gate is saved.

Drawings

Fig. 1 is a schematic structural view of the double-panel box door leaf of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the sand-blocking plane gate structure of the present invention comprises a plane gate body, wherein the lower portion of the plane gate body is set as a double-panel box-type gate leaf 1, and the height of the double-panel box-type gate leaf 1 is greater than the silt burying height of the upstream and downstream sides of the double-panel box-type gate leaf 1, so as to reduce the silt viscous force around the double-panel box-type gate leaf 1; the bottom edge sealing plate 2 of the double-panel box type door leaf 1 is an inclined plane which inclines more than or equal to 30 degrees towards the upper part of the downstream side, and a water leakage port 4 is arranged on a cross beam web plate 3 in the double-panel box type door leaf 1 so as to prevent the buoyancy and the self weight of the water body in the closed cavity from generating the influence on the opening and closing force.

In order to eliminate the lower suction force generated by the negative pressure at the lower part of the double-panel box type door leaf 1, an arc pipe groove 5 with a downward opening is transversely arranged on the surface of the bottom edge seal plate 2 along the plane gate; then, a riser 6 is provided in the double-panel box door leaf 1.

Now, the hoist is used for opening and closing the sand blocking plane gate at the conventional speed of 2.5m/min as an example for description:

the width of the sand blocking plane gate is 5.4m (4.2 m after the edge beam is planed off), the thickness of the double-panel box type door leaf 1 is 1.5m, four vertical pipes 6 (air supplement or water supplement) with the diameter of 20cm are selected, and the diameter of the circular arc pipe groove 5 is 30 cm.

Four stand pipes 6 penetrate through a cross beam web 3 in a double-panel box type door leaf 1 and are arranged at intervals, lower pipe openings of the four stand pipes 6 are communicated with an arc pipe groove 5, and upper pipe openings of the four stand pipes 6 extend out of the upper portion of a plane gate body by 30 cm.

The four vertical pipes 6 have the functions of supplying air to the lower part of the sand blocking plane gate when the upper pipe orifices of the vertical pipes 6 are higher than the water surface and supplying water to the lower part of the sand blocking plane gate when the upper pipe orifices of the vertical pipes 6 are lower than the water surface.

Claims

1. The utility model provides a keep off husky plane gate structure, includes the plane gate body, its characterized in that: the lower part of the plane gate body is of a double-panel box type gate leaf structure, and the height of the double-panel box type gate leaf is greater than the silt burying height; the bottom edge sealing plate of the double-sided board box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-sided board box type door leaf; the upper edge of the bottom edge sealing plate is transversely provided with an arc tube groove with a downward opening along the plane gate body, a plurality of vertical tubes are arranged in the double-panel box type door leaf, each vertical tube penetrates through the cross beam web plate in the double-panel box type door leaf, the lower tube opening of each vertical tube is communicated with the arc tube groove, and the upper tube opening of each vertical tube extends out of the plane gate body.

2. The sand stop plane gate structure according to claim 1, wherein: the diameter of the arc pipe groove is larger than or equal to that of the vertical pipe; the number of the vertical pipes arranged in the double-panel box type door leaf is multiple, the horizontal distance between every two adjacent vertical pipes is 80-110cm, the height of the top of each vertical pipe above the top of the plane gate body is more than or equal to 30cm, and the diameter of each vertical pipe is more than or equal to 20 cm.

3. The sand stop plane shutter structure according to claim 1 or 2, wherein: the angle of inclination of the bottom edge sealing plate towards the upper part of the downstream side is more than or equal to 30 degrees.