Sand screening machine for water conservancy project

Abstract

The utility model belongs to the technical field of river sand screening, in particular to a sand screening machine for hydraulic engineering, which comprises a drum sand screening machine and a river sand conveying belt, a river sand washing plate is arranged in the drum sand screening machine, a conveying water pipe is arranged above the river sand washing plate, a connecting hose is fixedly connected between the river sand washing plate and the conveying water pipe, and the connecting hose is connected with the drum sand screening machine. A water and sand feeding belt is installed below the drum sand screening machine, the top end of a water and sand feeding belt support is fixedly connected with a river sand filtering belt, and the inner wall of the drum sand screening machine is fixedly connected with a water body intercepting ring; river sand at the tail end of the drum sand screening machine can be washed through a river sand washing plate, a conveying water pipe and a connecting hose, impurities and the river sand attached to the surface of a filter screen of the drum sand screening machine can be removed in cooperation with interception of a water body interception ring on the water body, and the river sand is impacted by water flow to penetrate through the filter screen of the drum sand screening machine; and a water and sand feeding belt and a river sand filtering belt are matched to secondarily filter the river sand mixed with the water body, so that the screening effect on the river sand can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of river sand screening, and particularly relates to a sand screening machine for water conservancy projects. Background Technique

[0002] Through the planned excavation of river sand, the river course can be effectively treated to avoid river course blockage. When processing the excavated river sand, a sand screening machine is needed to screen the river sand. At present, a drum sand screening machine can be used to screen impurities in the river sand. However, due to the high water content of the river sand, both the impurities and the surface of the filter screen of the sand screening machine will be attached with river sand. As the drum sand screening machine rotates, the river sand attached to the inner wall of the upper sieve will fall downward. Since the drum sand screening machine is inclined, there is a horizontal level difference in the screening mesh plate of the drum sand screening machine, and part of the river sand will fall on the tail barrel plate part of the drum sand screening machine. The river sand will be discharged along with the barrel plate, and the impurities will also carry the river sand when discharged through the opening at the tail of the sand screening machine, resulting in the mixing and accumulation of part of the river sand and impurities, and it is difficult to effectively separate them. Content of the Utility Model

[0003] The utility model provides a sand screening machine for water conservancy projects, which has the characteristics of flushing the river sand in the stomach of the drum sand screening machine and can greatly improve the screening effect of the river sand.

[0004] The utility model provides the following technical solution: a sand screening machine for water conservancy projects, including a drum sand screening machine and a river sand conveyor belt. A river sand flushing plate is arranged inside the drum sand screening machine, a water conveying pipe is arranged above the river sand flushing plate, a connecting hose is fixedly connected between the river sand flushing plate and the water conveying pipe, a water and sand feeding belt is installed below the drum sand screening machine, a river sand filtering belt is fixedly connected to the top end of the water and sand feeding belt bracket, and a water body intercepting ring is fixedly connected to the inner wall of the drum sand screening machine.

[0005] Wherein, a protective arc plate is fixedly connected to the top end of the river sand flushing plate, and a connecting rope is fixedly connected between the river sand flushing plate and the water conveying pipe.

[0006] Wherein, the tail of the water and sand feeding belt tilts upward, and the bending position of the water and sand feeding belt is below the river sand flushing plate.

[0007] Wherein, a support frame is fixedly connected to the side wall of the river sand conveyor belt, a water and sand guiding plate is fixedly connected to one side of the support frame, and a river sand guiding plate is fixedly connected to the other side of the support frame.

[0008] Wherein, a water body collecting trough plate is arranged below the water and sand feeding belt, and a support rod is fixedly connected to the bottom end of the water body collecting trough plate.

[0009] The beneficial effects of the present utility model are as follows: Through the river sand washing plate, the conveying water pipe and the connecting hose, the river sand at the tail end of the drum sand screening machine can be washed. The interception of water by the water body interception ring can remove impurities and the river sand attached to the surface of the filter screen of the drum sand screening machine, and the river sand is impacted by the water flow to pass through the filter screen of the drum sand screening machine. With the cooperation of the water-sand feeding belt and the river sand filtering belt, the river sand mixed with water is filtered twice to separate and convey the river sand and impurities to different positions, which can greatly improve the screening effect of the river sand.

[0010] The parts not involved in this device are the same as the prior art or can be implemented using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is Figure 1 an enlarged view of part A in

[0013] Figure 3 is a schematic structural diagram of the river sand washing plate in the present utility model.

[0014] In the figure: 1, drum sand screening machine; 11, river sand conveyor belt; 2, river sand washing plate; 21, conveying water pipe; 22, connecting hose; 23, protective arc plate; 24, connecting rope; 3, water-sand feeding belt; 31, river sand filtering belt; 4, water body interception ring; 5, support frame; 51, water-sand guiding plate; 52, river sand guiding plate; 6, water body collection trough plate; 61, support rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Please refer to Figures 1-3 , the present utility model provides the following technical solutions: A sand screening machine for water conservancy projects, including a drum sand screening machine 1 and a river sand conveyor belt 11. A river sand washing plate 2 is provided inside the drum sand screening machine 1. A conveying water pipe 21 is provided above the river sand washing plate 2. A connecting hose 22 is fixedly connected between the river sand washing plate 2 and the conveying water pipe 21. A water-sand feeding belt 3 is installed below the drum sand screening machine 1. The top end of the support of the water-sand feeding belt 3 is fixedly connected with a river sand filtering belt 31. A water body interception ring 4 is fixedly connected to the inner wall of the drum sand screening machine 1.

[0016] In this implementation: Materials are fed into the feed hopper of the drum sand sieve 1 by machinery such as forklifts. The river sand is screened by the front part of the drum sand sieve 1. Large particle impurities are retained in the drum sand sieve 1, and the river sand passes through the filter screen of the drum sand sieve 1 and falls onto the river sand conveyor belt 11, and is conveyed to the blanking position via the river sand conveyor belt 11. The river sand washing plate 2 is installed at the rear part of the drum sand sieve 1. When the large particle impurities enter the corresponding part of the river sand washing plate 2, the water discharged through the river sand washing plate 2, the water conveying pipe 21 and the connecting hose 22 flushes the impurities in the drum sand sieve 1 and the filter screen of the rear part of the drum sand sieve 1 to realize the separation of the attached river sand, and can remove the river sand attached to the surface of the impurities and the screening net surface of the drum sand sieve 1, and the river sand is washed through the filter screen of the drum sand sieve 1 by the impact of the water flow. During the process, the water interception ring 4 can intercept the water body to prevent the water body from directly discharging the impurities through the tail end opening of the drum sand sieve 1, and can intercept and guide the river sand falling on the filter screen of the drum sand sieve 1, so that the water body can carry the impurities through the filter screen of the drum sand sieve 1 and then fall into the water and sand feeding belt 3 and the river sand filtering belt 31. The water and sand feeding belt 3 slowly conveys the water body and the river sand upward. During the conveying process of the water and sand feeding belt 3, the river sand filtering belt 31 filters the river sand mixed with the water body for the second time. The water body passes through the river sand filtering belt 31 and falls into the water body collecting trough plate 6. The river sand moves along the water and sand feeding belt 3 to convey the river sand to the blanking position of the river sand conveyor belt 11. The device can filter the impurities and the river sand attached to the surface of the drum sand sieve 1 for the second time, can greatly improve the screening effect of the river sand, and the river sand washing plate 2 is connected to the water conveying pipe 21 via the connecting hose 22, so that the river sand washing plate 2 can shake when being collided, reducing the damage suffered by the river sand washing plate 2 when being impacted. A plurality of drain holes are provided on the river sand washing plate 2. The water conveying pipe 21 is connected to an external water supply device. The water body is conveyed to the river sand washing plate 2 via the water conveying pipe 21 and the connecting hose 22 and discharged through the drain holes of the river sand washing plate 2.

[0017] A protective arc plate 23 is fixedly connected to the top end of the river sand washing plate 2, and a connecting rope 24 is fixedly connected between the river sand washing plate 2 and the water conveying pipe 21; by providing the protective arc plate 23, the river sand washing plate 2 can be protected, and the center of the protective arc plate 23 arches upward. When the impurities splash onto the top end of the river sand washing plate 2, they can fall along the arc of the protective arc plate 23 itself. By providing the connecting rope 24, the water conveying pipe 21 and the river sand washing plate 2 can be connected, increasing the stability of the river sand washing plate 2 and preventing the connecting hose 22 from being damaged due to excessive acting force.

[0018] The tail of the water-sand feeding belt 3 tilts upward, and the bending position of the water-sand feeding belt 3 is below the river sand washing plate 2; the upward tilt of the tail of the water-sand feeding belt 3 enables the water-sand feeding belt 3 and the river sand filtering belt 31 to form a receiving groove to intercept the river sand, preventing the water body and the river sand from directly sliding down along the inclined angle of the water-sand feeding belt 3 after falling on the water-sand feeding belt 3. The river sand conveyor belt 11 undertakes the main river sand conveying function, and the river sand conveyor belt 11 keeps rotating at a high speed to timely convey the river sand to the dropping point. The amount of sand dropped on the water-sand feeding belt 3 is less than the amount of sand at the top of the river sand conveyor belt 11. The water-sand feeding belt 3 runs at a low speed to provide sufficient time for the separation of the river sand and the water body, and can reduce the energy consumption during the operation of the water-sand feeding belt 3.

[0019] A support frame 5 is fixedly connected to the side wall of the river sand conveyor belt 11. A water-sand guide plate 51 is fixedly connected to one side of the support frame 5, and a river sand guide plate 52 is fixedly connected to the other side of the support frame 5; by setting the support frame 5, the water-sand guide plate 51 and the river sand guide plate 52 can be supported. The water-sand guide plate 51 can guide the river sand mixed with the water body so that the river sand mixed with the water can fall on the water-sand feeding belt 3, and the river sand guide plate 52 can guide the river sand not mixed with the water body so that the river sand not mixed with the water body falls on the river sand conveyor belt 11.

[0020] A water body collection trough plate 6 is arranged below the water-sand feeding belt 3, and a support rod 61 is fixedly connected to the bottom end of the water body collection trough plate 6; by setting the water body collection trough plate 6, the water body filtered by the river sand filtering belt 31 can be collected, preventing the water body from directly falling on the screening site, thus avoiding pollution of the screening site. By setting the support rod 61, one side of the water body collection trough plate 6 can be lifted, enabling the water body to flow towards one side of the water body collection trough plate 6 for easy discharge of the water body through the conveying pipeline.

[0021] Working principle and usage process of the utility model: Materials are fed into the feed hopper of the drum sand screening machine 1 by machinery such as forklifts. The river sand is screened through the front part of the drum sand screening machine 1. Large particle impurities are retained in the drum sand screening machine 1, and the river sand passes through the filter screen of the drum sand screening machine 1 and falls onto the river sand conveyor belt 11, and is conveyed to the blanking position via the river sand conveyor belt 11. When the large particle impurities enter the corresponding part of the river sand washing plate 2, the water discharged by the river sand washing plate 2, the water conveying pipe 21 and the connecting hose 22 is used to wash the impurities in the drum sand screening machine 1 and the filter screen of the subsequent drum sand screening machine 1 to realize the separation of the attached river sand, and the river sand attached to the surface of the impurities and the screening net surface of the drum sand screening machine 1 can be removed. And with the impact of water flow, the river sand passes through the filter screen of the drum sand screening machine 1. During the process, the water body interception ring 4 intercepts the water body to prevent the water body from directly discharging the impurities through the tail end opening of the drum sand screening machine 1, and can intercept and guide the river sand falling on the filter screen of the drum sand screening machine 1, so that the water body can carry the impurities through the filter screen of the drum sand screening machine 1 and then fall into the water and sand feeding belt 3 and the river sand filtering belt 31. The water and sand feeding belt 3 slowly conveys the water body and the river sand upward slowly. During the conveying process of the water and sand feeding belt 3, the river sand filtering belt 31 performs secondary filtering on the river sand mixed with the water body. The water body passes through the river sand filtering belt 31 and falls into the water body collecting trough plate 6. The river sand moves along the water and sand feeding belt 3 to convey the river sand to the blanking position of the river sand conveyor belt 11.

Claims

1. A sand screening machine for water conservancy projects, comprising a drum sand screening machine (1) and a river sand conveyor belt (11), characterized in that: The drum sand screening machine (1) is provided with a river sand washing plate (2), a conveying water pipe (21) is provided above the river sand washing plate (2), a connecting hose (22) is fixedly connected between the river sand washing plate (2) and the conveying water pipe (21), a water sand feeding belt (3) is installed below the drum sand screening machine (1), a river sand filtering belt (31) is fixedly connected to the top of the bracket of the water sand feeding belt (3), and a water interception circle (4) is fixedly connected to the inner wall of the drum sand screening machine (1).

2. A sand screening machine for water conservancy projects according to claim 1, characterized in that: A protective arc plate (23) is fixedly connected to the top of the river sand flushing plate (2), and a connecting rope (24) is fixedly connected between the river sand flushing plate (2) and the conveying water pipe (21).

3. A sand screening machine for water conservancy projects according to claim 1, characterized in that: The tail of the water-sand feeding belt (3) is tilted upward, and the bending position of the water-sand feeding belt (3) is located below the river sand flushing plate (2).

4. A sand screening machine for water conservancy projects according to claim 1, characterized in that: The side wall of the river sand conveyor belt (11) is fixedly connected to a support frame (5), one side of the support frame (5) is fixedly connected to a water and sand guide plate (51), and the other side of the support frame (5) is fixedly connected to a river sand guide plate (52).

5. The sand screening machine for water conservancy projects according to claim 1, characterized in that: A water collection trough plate (6) is provided below the water-sand feeding belt (3), and a support rod (61) is fixedly connected to the bottom end of the water collection trough plate (6).

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