Sand suction type sand blocking wall

Abstract

The utility model provides a sand suction type sand blocking wall. A plurality of sand blocking plates are arranged between stand columns from top to bottom. Each sand baffle comprises a windward plate and a leeward plate; a cavity is formed between the windward plate and the leeward plate; the top of the windward plate is provided with a top plate, and is hinged with the top of the leeward plate through a hinge; an inclined plate is arranged at the bottom of the windward plate, the higher end edge of the inclined plate is connected with the bottom of the windward plate, and the lower end is connected with the bottom of the leeward plate; a plurality of air inlets are formed in the windward plate, the air inlets are in a trapezoid shape, and the air inlets are gradually reduced from outer openings in the outer wall of the windward plate to inner openings in the inner wall of the windward plate; an air outlet is formed in the leeward plate and corresponds to an inner opening of the air inlet in the inner wall of the windward plate; a sand outlet is further formed in the lower half part of the leeward plate, and the position of the sand outlet is opposite to that of the inclined plate; a fine net device for adsorbing fine sand is arranged on the inner wall of the leeward plate. The sand suction type sand blocking wall has the functions of double sand blocking, fine sand adsorption and sand flow direction guiding.

Description

Technical Field

[0001] The utility model provides a sand-absorbing sand retaining wall, belonging to the technical field of sand prevention. Background Art

[0002] The patent with publication number CN102505643B discloses a high vertical sand barrier device - an inclined plug-in plate type sand retaining wall, which includes a column with one end buried in the ground and the other end extending out of the ground and a plate-type retaining body fixed between the columns. It is characterized in that the plate-type retaining body fixed between the columns is composed of separate plug-ins, and an air channel with an angle of 30 to 60 degrees to the horizontal plane is left between the stacked layers of each plug-in plate. The cross-section of each plug-in plate is a rhombus with a small angle α equal to 30 to 60 degrees, and its longitudinal section is a concave shape with an opening. Under the condition of setting the sand retaining wall, the rhombus small angle α of the plug-in plate points to the wind direction. In the assembled state, each concave plug-in plate is inserted into a fixing groove provided in the column to achieve fixation, and an air channel with an angle to the horizontal plane is formed between the straight edge of the opening of one plug-in plate and the top surface plane of another plug-in plate in contact.

[0003] This technology has the following disadvantages:

[0004] 1. This technology mainly plays a role in primary sand blocking; 2. Although this technology can achieve a large amount of sand deposition on the windward side, the sand accumulation on both sides is unevenly distributed; and the sand accumulation position is close to the wall, which will reduce the sand prevention effect of the sand retaining wall to a certain extent. Excessive sand accumulation on the windward side will seriously affect the service life of the sand retaining wall. 3. The sand accumulation on the leeward side of this technology is close to the sand retaining wall, and the porosity of the sand retaining wall is low.

[0005] 4. The height of the sand retaining wall in this technology is fixed and cannot be adjusted according to the actual environment, which lacks flexibility. Utility Model Content

[0006] In view of the above technical problems, the utility model provides a sand-absorbing sand retaining wall, and the specific technical solution is as follows:

[0007] The sand-absorbing sand retaining wall comprises a pair of upright posts, between which a plurality of sand retaining plates are arranged from top to bottom, and gaps are left between adjacent sand retaining plates;

[0008] Each sand shield includes a windward board and a leeward board; a cavity is formed between the windward board and the leeward board; a top board is provided on the top of the windward board, and the top and the top of the leeward board are hinged by hinges; an inclined board is provided at the bottom of the windward board, and the higher end of the inclined board is connected to the bottom of the windward board, and the lower end is connected to the bottom of the leeward board;

[0009] The windward plate is provided with a plurality of air inlets, which are in a trapezoidal shape, and the air inlets gradually become smaller from the outer opening on the outer wall of the windward plate to the inner opening on the inner wall of the windward plate;

[0010] An air outlet is provided on the leeward plate, and the air outlet corresponds to the inner opening of the air inlet on the inner wall of the windward plate;

[0011] The lower half of the leeward plate is also provided with a sand outlet, and the position of the sand outlet is opposite to the inclined plate;

[0012] The inner wall of the leeward plate is also provided with bosses on both sides of the air outlet and the sand outlet.

[0013] A fine mesh device for absorbing fine sand is arranged on the inner wall of the leeward board.

[0014] The sand-absorbing sand retaining wall of the utility model has the functions of double sand blocking, adsorbing fine sand and guiding the flow direction of sand particles.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] 1. The technical solution provided by the utility model can play a secondary sand-blocking role, and also take into account the effect of further preventing and controlling fine sand; at the same time, the sand retaining wall can change the redistribution function of the sand deposition position.

[0017] 2. The utility model provides a technical solution that guides a portion of sand to the leeward side for deposition through the conveying effect. This design greatly improves the sand-proof effect of the sand retaining wall caused by excessive sand accumulation on the windward side, prolongs the sand-proof period of the sand retaining wall and its service life, reduces the frequency and cost of sand cleaning maintenance, makes the sand cleaning work more reasonable, and avoids unreasonable maintenance work caused by multiple single cleanings of sand on the windward side.

[0018] 3. The utility model provides a technical solution in which the sand deposition position on the leeward side is shifted under the combined effects of gravity and wind load, and the accumulated sand on the leeward side will not be close to the sand retaining wall, thereby ensuring the porosity of the sand retaining wall and improving the sand prevention period. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the windward surface structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the leeward side structure of the utility model. DETAILED DESCRIPTION

[0021] The specific technical solution of the utility model is explained in conjunction with the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, the sand-absorbing sand retaining wall comprises a pair of columns 1, a plurality of sand retaining plates are arranged between the columns 1 from top to bottom, and gaps 5 are left between adjacent sand retaining plates;

[0023] Each sand shield includes a windward board 2 and a leeward board 3; a cavity is formed between the windward board 2 and the leeward board 3; a top plate is provided on the top of the windward board 2, and the top and the top of the leeward board 3 are hinged by a hinge 4; an inclined plate 22 is provided at the bottom of the windward board 2, and the higher end of the inclined plate 22 is connected to the bottom of the windward board 2, and the lower end is connected to the bottom of the leeward board 3;

[0024] The windward plate 2 is provided with a plurality of air inlets 21, which are in a trapezoidal shape, and the air inlets 21 gradually become smaller from the outer opening on the outer wall of the windward plate 2 to the inner opening on the inner wall of the windward plate 2;

[0025] An air outlet 31 is provided on the leeward plate 3, and the air outlet 31 corresponds to the inner opening of the air inlet 21 on the inner wall of the windward plate 2;

[0026] The lower half of the leeward plate 3 is also provided with a sand outlet 32, and the position of the sand outlet 32 ​​is opposite to the inclined plate 22;

[0027] The inner wall of the leeward plate 3 is provided with bosses 33 on both sides of the air outlet 31 and the sand outlet 32 ​​.

[0028] The inner wall of the leeward plate 3 is provided with a fine mesh device for absorbing fine sand.

[0029] The I-shaped column 1 and the sand retaining plate are made of concrete. Multiple identical sand retaining plates are inserted and stacked for assembly. The height of the sand retaining plate is recommended to be designed to be 0.5m, and the number of columns is selected according to the actual working conditions.

[0030] The columns 1 are embedded along the railway line in accordance with the actual working conditions, with an interval of 2m. The windward plate 2 and the leeward plate 3 of the sand barrier are 3cm thick. The sand barrier has a cavity structure with a cavity width of 9cm, which enhances the wind-sand two-phase flow movement inside the sand barrier and improves the secondary sand blocking effect. A fine mesh device for adsorbing fine sand is set inside the leeward plate 3, and bosses 33 with a height of 50mm are also set on both sides, which are designed based on a fixed porosity of 10%.

[0031] The air inlet 21 of the windward plate 2 is in a trapezoidal shape, and the air inlet 21 gradually becomes smaller from the outer opening on the outer wall of the windward plate 2 to the inner opening on the inner wall of the windward plate 2;

[0032] The outer opening size is 350mm×60mm, the inner opening size is 350mm×50mm, and the air inlet 21 adopts a gradual size change design, that is, the pores from the outer opening to the inner opening gradually transition from large to small, so as to enhance the flow velocity of sand particles entering from the windward side;

[0033] The air outlet 31 of the leeward plate 3 is kept parallel to the inner opening wall on the inner wall of the windward plate 2 and has the same size to ensure the effective flow of the fluid.

[0034] The porosity of the air inlet 21 of the windward plate 2 is designed to be 35%; the inclined plate 22 is designed to be inclined at a 45° angle, inclined downward toward the leeward plate 3, and the 45° inclination design realizes the reasonable distribution of the sand deposition position of the sand retaining plate, and the 45° inclined plate design enhances the flow field characteristics between adjacent sand retaining plates, further improving the sand prevention effect between the inserted sand retaining plates.

[0035] The fine mesh device is installed on the leeward plate 3 inside the sand retaining plate.

[0036] The opening of the sand outlet 32 ​​is 1840 mm long and 20 mm high.

[0037] When the two-phase flow of wind and sand flows from the windward side, due to the existence of the sand-absorbing sand retaining wall, a vortex will be formed at the windward plate 2 of the sand retaining wall, thereby reducing the wind speed and causing some sand to settle. Due to the gap 5 at the bottom, the sand deposited at the corner of the windward plate 2 of the sand retaining wall will be transferred to the leeward plate 3 with the wind, thereby increasing the service performance of the sand retaining wall. The wind and sand entering the sand-absorbing sand retaining wall will be accelerated to a certain extent due to the presence of the gradual air inlet 21 of the windward plate 2. When this accelerated part of the airflow moves to the fine mesh device of the leeward plate 3, i.e., the sand-absorbing cloth, it will be decelerated sharply due to the presence of the sand-absorbing cloth, causing the sand to settle. The sand deposited on the sand-absorbing cloth will flow out from the sand outlet 32 ​​at the bottom of the leeward plate 3 due to gravity. This part of the sand that flows out is accelerated by the airflow passing through the gap 5, so that it falls to a certain position away from the leeward plate 3 in the form of a parabola, thereby achieving the secondary blocking of fine sand and the redistribution of the sand deposition position.

Claims

1. Sand-absorbing sand retaining wall, characterized in that: It comprises a pair of upright posts (1), with a plurality of sand retaining plates being arranged between the upright posts (1) from top to bottom; Each sand shield comprises a windward plate (2) and a leeward plate (3); a cavity is formed between the windward plate (2) and the leeward plate (3); a top plate is provided at the top of the windward plate (2), and the top and the top of the leeward plate (3) are hingedly connected by a hinge (4); an inclined plate (22) is provided at the bottom of the windward plate (2), and the higher end of the inclined plate (22) is connected to the bottom of the windward plate (2), and the lower end is connected to the bottom of the leeward plate (3); A plurality of air inlets (21) are provided on the windward plate (2), the air inlets (21) are in a trapezoidal shape, and the air inlets (21) gradually become smaller from an outer opening on the outer wall of the windward plate (2) to an inner opening on the inner wall of the windward plate (2); An air outlet (31) is provided on the leeward plate (3), and the air outlet (31) corresponds to the inner opening of the air inlet (21) on the inner wall of the windward plate (2); The lower half of the leeward plate (3) is also provided with a sand outlet (32), and the position of the sand outlet (32) is opposite to the inclined plate (22); the inner wall of the leeward plate (3) is provided with a fine mesh device for absorbing fine sand; There is a gap (5) between adjacent sand retaining plates.

2. The sand-absorbing sand retaining wall according to claim 1, characterized in that: The inner wall of the leeward plate (3) is further provided with bosses (33) on both sides of the air outlet (31) and the sand outlet (32).

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