Sand screening equipment for water conservancy project

Abstract

The utility model discloses sand screening equipment for hydraulic engineering, which belongs to the technical field of sand screening equipment and comprises a support frame, and a screening shell is fixedly mounted at the top end of the support frame; a discharging pipe is fixedly installed at the other end of the screening shell, a first motor is fixedly installed at the bottom of one end of the screening shell, an output shaft of the first motor is fixedly connected with a spiral blade through a coupler, and one end of the spiral blade penetrates through and extends into the discharging pipe; and a screening mechanism for rotatably screening river sand and impurities is arranged in the screening shell, and a limiting mechanism for prolonging the retention time of the river sand is arranged in the screening mechanism. By arranging the limiting mechanism, the standing time of river sand in the screen drum can be prolonged, it is ensured that the river sand and impurities are fully separated, the situation that the impurities are discharged along with the river sand is reduced, the purity and efficiency of sand screening are improved, the quality stability of the river sand is ensured, and the requirement of a user for high-quality river sand is met.

Description

Technical Field

[0001] This utility model relates to the field of sand screening equipment technology, and in particular to a sand screening equipment for water conservancy projects. Background Technology

[0002] Water conservancy projects are various constructions and services undertaken by the state to benefit mankind or avoid disasters caused by floods by utilizing natural resources. Through planned river sand dredging, river channels can be effectively managed to avoid blockage. When processing the dredged river sand, a sand screening machine is needed to screen the sand. Currently, impurities in river sand can be screened using a drum sand screening machine.

[0003] According to the announcement number CN222901696U, a sand screening machine for water conservancy projects can wash the river sand at the tail end of the drum sand screening machine through a river sand washing plate, a conveying water pipe and a connecting hose. With the help of a water interception ring to intercept the water, impurities and river sand attached to the surface of the drum sand screening machine's filter screen can be removed. The river sand is impacted by the water flow and passes through the filter screen of the drum sand screening machine. The river sand mixed with water is further filtered by a water and sand feeding belt and a river sand filter belt to separate the river sand and impurities and transport them to different locations, which can significantly improve the screening effect of river sand.

[0004] Existing sand screening equipment used in water conservancy projects typically employs inclined drums to screen river sand. The river sand enters the drum through the feed inlet, and during the drum's rotation, it gradually moves downwards due to gravity and is discharged through the screen. However, since there is no limiting structure inside the drum, the river sand falls from the screen at a relatively fast speed, resulting in insufficient separation between the river sand and impurities. Ultimately, the sand is discharged along with the impurities, affecting the screening effect and the purity of the river sand.

[0005] Therefore, there is an urgent need to provide a sand screening device for water conservancy projects to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a sand screening device for water conservancy projects.

[0007] To solve the above-mentioned technical problems, the present invention provides a sand screening device for water conservancy projects, including a support frame, a screening shell fixedly installed at the top of the support frame, and a slag discharge plate fixedly installed at the middle of one end of the screening shell.

[0008] A discharge pipe is fixedly installed at the other end of the screening shell, and a first motor is fixedly installed at the bottom of one end of the screening shell. The output shaft of the first motor is fixedly connected to a spiral blade that extends through and into the discharge pipe via a coupling.

[0009] The screening shell is equipped with a screening mechanism for rotating and screening river sand and impurities, and the screening mechanism is equipped with a limiting mechanism to extend the residence time of river sand.

[0010] Through the above technical solution, the river sand screened by the sand screening equipment flows into the discharge pipe through the screening shell. The first motor drives the spiral blades to rotate, and the spiral blades drive the river sand to be discharged through the discharge pipe and transported by the transportation equipment.

[0011] The present invention is further configured such that: the screening mechanism includes a second motor fixed to the front side of one end of the screening shell, the output shaft of the second motor is fixedly connected to a drive gear shaft through a coupling, and a driven gear shaft is rotatably installed between the inner cavities of the screening shell.

[0012] Through the above technical solution, the second motor drives the drive gear shaft to rotate.

[0013] The present invention is further configured such that: arc-shaped guide rails are fixedly installed on both sides of the inner cavity of the screening shell, and circular gears are rotatably installed inside the two arc-shaped guide rails, and the outer sides of the two circular gears mesh with the outer sides of the driving gear shaft and the driven gear shaft, respectively.

[0014] Through the above technical solution, the driving gear shaft drives the ring gear to rotate through the arc-shaped guide rail, and the ring gear drives the driven gear shaft to rotate accordingly.

[0015] The present invention is further configured such that: a screen rotating cylinder is fixedly installed inside the two ring gears, and an installation guide rail is fixedly installed inside the screen rotating cylinder.

[0016] Through the above technical solution, the circular gear drives the screen drum and the mounting rail to rotate, and the screen drum separates river sand from impurities.

[0017] The present invention is further configured such that: the limiting mechanism includes a fixing plate fixed to the top of one end of the screening shell, a third motor is fixedly installed on one side of the fixing plate, and the output shaft of the third motor is fixedly connected to a rotating shaft through a coupling.

[0018] Using the above technical solution, the third motor drives the rotating shaft to rotate.

[0019] The present invention is further configured such that: four limiting plates are fixedly installed on the outside of the rotating shaft, and the outside of the four limiting plates are respectively rotatably connected to the inside of the mounting guide rail, and the four limiting plates are staggered.

[0020] Through the above technical solution, the rotating shaft drives the four limiting plates to rotate. Since the four limiting plates are staggered, they alternately block the river sand when rotating, thus prolonging the residence time of the river sand in the screen drum.

[0021] The present invention is further configured such that: mounting frames are fixedly installed on both sides of the screening shell, and a feeding hopper is fixedly installed on the top of the mounting frame, with one end of the feeding hopper extending into the interior of the screen rotating drum.

[0022] The above technical solution involves adding river sand through a feeding hopper, which then enters the rotating screen drum.

[0023] The beneficial effects of this utility model are as follows:

[0024] 1. This utility model, by providing a limiting mechanism, can extend the residence time of river sand in the screen drum, ensure that the river sand is fully separated from impurities, reduce the discharge of impurities with the river sand, improve the purity and efficiency of sand screening, ensure the quality stability of river sand, and meet the user's demand for high-quality river sand.

[0025] 2. This utility model has a screening mechanism that drives the screen drum to rotate, thereby rotating and screening river sand and impurities, reducing the direct impact and clogging of the screen drum by river sand, and also reducing the wear of the screen drum and extending the service life of the equipment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a structural diagram of the internal structure of the screening shell of this utility model;

[0028] Figure 3 This is a structural diagram of the screening mechanism and the limiting mechanism of this utility model;

[0029] Figure 4 This is a structural diagram of the limiting mechanism of this utility model.

[0030] In the diagram: 1. Support frame; 2. Screening shell; 3. Slag discharge plate; 4. Discharge pipe; 5. First motor; 6. Spiral blade; 7. Screening mechanism; 701. Second motor; 702. Driven gear shaft; 703. Driven gear shaft; 704. Arc-shaped guide rail; 705. Ring gear; 706. Screen rotating drum; 707. Mounting guide rail; 8. Limiting mechanism; 801. Fixing plate; 802. Third motor; 803. Rotating shaft; 804. Limiting plate; 805. Mounting frame; 806. Feeding hopper. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0032] Please see Figures 1-4 A sand screening device for water conservancy projects includes a support frame 1, a screening shell 2 fixedly installed at the top of the support frame 1, a slag discharge plate 3 fixedly installed at the middle of one end of the screening shell 2, a discharge pipe 4 fixedly installed at the other end of the screening shell 2, a first motor 5 fixedly installed at the bottom of one end of the screening shell 2, and a spiral blade 6 with one end penetrating and extending into the discharge pipe 4 fixedly connected to the output shaft of the first motor 5 through a coupling. The river sand screened by the sand screening device flows into the discharge pipe 4 through the screening shell 2. The first motor 5 drives the spiral blade 6 to rotate, and the spiral blade 6 drives the river sand to be discharged through the discharge pipe 4 and transported by a transportation device.

[0033] like Figure 2 and Figure 3 As shown, the screening shell 2 is equipped with a screening mechanism 7 for rotary screening of river sand and impurities. The screening mechanism 7 includes a second motor 701 fixed to the front side of one end of the screening shell 2. The output shaft of the second motor 701 is fixedly connected to a drive gear shaft 702 via a coupling. A driven gear shaft 703 is rotatably installed between the inner cavities of the screening shell 2. Arc-shaped guide rails 704 are fixedly installed on both sides of the inner cavity of the screening shell 2. Circular gears 705 are rotatably installed inside both arc-shaped guide rails 704. The outer surfaces of the two circular gears 705 are respectively connected to the drive gear shaft 702 and the driven gear shaft 703. The driven gear shaft 703 is externally meshed with the two ring gears 705, and a screen rotating drum 706 is fixedly installed inside the screen rotating drum 706. A mounting guide rail 707 is fixedly installed inside the screen rotating drum 706. The second motor 701 drives the drive gear shaft 702 to rotate, and the drive gear shaft 702 drives the ring gear 705 to rotate through the arc-shaped guide rail 704. The ring gear 705 drives the driven gear shaft 703 to rotate accordingly, and the ring gear 705 drives the screen rotating drum 706 and the mounting guide rail 707 to rotate accordingly. The river sand is separated from impurities through the screen rotating drum 706.

[0034] like Figure 1 and Figure 4As shown, the screening mechanism 7 has a limiting mechanism 8 inside to extend the residence time of river sand. The limiting mechanism 8 includes a fixing plate 801 fixed to the top of one end of the screening shell 2. A third motor 802 is fixedly installed on one side of the fixing plate 801. The output shaft of the third motor 802 is fixedly connected to a rotating shaft 803 via a coupling. Four limiting plates 804 are fixedly installed on the outside of the rotating shaft 803. The outside of the four limiting plates 804 are respectively rotatably connected to the inside of the mounting guide rail 707. The four limiting plates 804 are staggered. The screening shell 2 has a fixed mounting mechanism 8 on both sides. The mounting frame 805 has a feeding hopper 806 fixedly installed at its top. One end of the feeding hopper 806 extends into the screen rotating drum 706. River sand is added through the feeding hopper 806 and enters the screen rotating drum 706 through the feeding hopper 806. The third motor 802 drives the rotating shaft 803 to rotate, and the rotating shaft 803 drives the four limiting plates 804 to rotate. Since the four limiting plates 804 are staggered, they alternately block the river sand when rotating, prolonging the residence time of the river sand in the screen rotating drum 706.

[0035] In use, river sand is added through the feeding hopper 806 and enters the screen rotating drum 706. The second motor 701 drives the drive gear shaft 702 to rotate, which in turn drives the ring gear 705 to rotate via the arc-shaped guide rail 704. The ring gear 705 then drives the driven gear shaft 703 to rotate, which in turn drives the screen rotating drum 706 and the mounting guide rail 707 to rotate. The screen rotating drum 706 separates the river sand from impurities. Meanwhile, the third motor 802 drives the rotating shaft 803 to rotate, and the rotating shaft 803 drives the four limiting plates 804 to rotate. Since the four limiting plates 804 are staggered, they alternately block the river sand when rotating, prolonging the residence time of the river sand in the screen drum 706. The river sand screened out by the sand screening equipment flows into the discharge pipe 4 through the screening shell 2. The first motor 5 drives the spiral blades 6 to rotate, and the spiral blades 6 drive the river sand to be discharged through the discharge pipe 4 and transported by the transportation equipment.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sand screening device for water conservancy projects, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly installed with a screening shell (2), and a slag discharge plate (3) is fixedly installed at the middle of one end of the screening shell (2). The other end of the screening shell (2) is fixedly installed with a discharge pipe (4), and the bottom of one end of the screening shell (2) is fixedly installed with a first motor (5). The output shaft of the first motor (5) is fixedly connected to a spiral blade (6) that extends through and into the discharge pipe (4) through a coupling. The screening shell (2) is equipped with a screening mechanism (7) for rotating and screening river sand and impurities, and the screening mechanism (7) is equipped with a limiting mechanism (8) to extend the residence time of river sand.

2. The sand screening equipment for water conservancy projects according to claim 1, characterized in that: The screening mechanism (7) includes a second motor (701) fixed to the front side of one end of the screening shell (2). The output shaft of the second motor (701) is fixedly connected to a drive gear shaft (702) via a coupling. A driven gear shaft (703) is rotatably installed between the inner cavities of the screening shell (2).

3. The sand screening equipment for water conservancy projects according to claim 2, characterized in that: The inner cavity of the screening shell (2) is fixedly installed with arc-shaped guide rails (704) on both sides. The inner cavity of the two arc-shaped guide rails (704) is rotatably installed with ring gears (705). The outer surfaces of the two ring gears (705) mesh with the outer surfaces of the drive gear shaft (702) and the driven gear shaft (703), respectively.

4. A sand screening device for water conservancy projects according to claim 3, characterized in that: A screen rotating cylinder (706) is fixedly installed inside the two ring gears (705), and an installation guide rail (707) is fixedly installed inside the screen rotating cylinder (706).

5. A sand screening device for water conservancy projects according to claim 2, characterized in that: The limiting mechanism (8) includes a fixing plate (801) fixed to the top of one end of the screening shell (2). A third motor (802) is fixedly installed on one side of the fixing plate (801). The output shaft of the third motor (802) is fixedly connected to a rotating shaft (803) through a coupling.

6. A sand screening device for water conservancy projects according to claim 5, characterized in that: Four limiting plates (804) are fixedly installed on the outside of the rotating shaft (803). The outside of the four limiting plates (804) is rotatably connected to the inside of the mounting guide rail (707). The four limiting plates (804) are staggered.

7. A sand screening device for water conservancy projects according to claim 4, characterized in that: The screening shell (2) is fixedly installed with mounting brackets (805) on both sides, and a feeding hopper (806) is fixedly installed at the top of the mounting brackets (805). One end of the feeding hopper (806) extends into the screen rotating cylinder (706).

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