A vibrating dewatering screen with built-in cyclones

Abstract

The utility model discloses a kind of vibration dewatering screen with built-in cyclone, for machine-made sand production. Including rack, dewatering screen body and built-in cyclone component;Dewatering screen body is equipped with screen box, upper and lower screen, vibrating motor and multiple discharge ports;Cyclone component is integrated in screen box, and external material source is connected through main inlet pipe, and parallel cyclone classifies, underflow is into screen box dehydration through underflow pipe, overflow is guided to sedimentation tank by overflow pipe. Device is classified by cyclone pretreatment grading load reduction, combined with vibration screen separation dehydration, solve the problem of traditional equipment classification insufficient, fine particle loss, improve efficiency, compact structure, suitable for machine-made sand efficient dehydration classification scene.

Description

Technical Field

[0001] This utility model relates to the technical field of manufactured sand production equipment, and in particular to a vibrating dewatering screen with a built-in hydrocyclone. Background Technology

[0002] In the production of manufactured sand, materials (such as crushed sand and gravel mixtures of ores and rocks) typically need to undergo processes such as washing, dewatering, and grading to obtain finished sand that meets the requirements of fields such as construction and concrete. Among these processes, dewatering and grading are key steps that directly affect the moisture content, gradation uniformity, and production efficiency of the finished sand.

[0003] In traditional manufactured sand production, material dewatering largely relies on a single vibrating screen: the screen uses high-frequency vibration to move the material along the screen surface, allowing water to pass through the filter and be discharged, while coarse particles move along the screen surface to the discharge port. However, actual production often faces the following problems: 1. Insufficient material classification: Manufactured sand raw materials have a wide particle size distribution, making it difficult for a single vibrating screen to efficiently separate materials of different sizes. This leads to fine particles easily clogging the screen holes, reducing dewatering efficiency; coarse particles may retain moisture due to insufficient screen vibration, affecting the finished sand's moisture content. 2. High cost of fine particle loss and wastewater treatment: During the vibrating screen dewatering process, some fine particles are lost with the water flow, not only wasting resources but also increasing the difficulty and cost of subsequent wastewater clarification treatment. 3. Short screen life: Manufactured sand contains a large number of hard mineral particles, and long-term vibration and friction easily cause ordinary screens to wear out, requiring frequent replacement and affecting production continuity.

[0004] Therefore, there is an urgent need for a new type of dewatering screen structure that can achieve accurate material classification, efficient dewatering, and reduce fine particle loss and equipment wear, in order to meet the needs of large-scale production of manufactured sand. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a vibrating dewatering screen with a built-in hydrocyclone.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model provides a vibrating dewatering screen with a built-in cyclone separator, comprising: a frame; a dewatering screen body, mounted on the frame and elastically connected to the frame via four elastic support columns; a cyclone assembly integrated into the top of the screen box of the dewatering screen body for pre-grading and solid-liquid separation of materials; the dewatering screen body includes: a screen box, which is a rectangular box with an open top and a feed inlet at the top; an upper screen and a lower screen, horizontally laid inside the screen box; a vibrating motor, inclinedly fixed to the bottom of the screen box; and coarse particle outlet and medium particle outlet, respectively located on the front wall of the screen box. The lower part extends along the vibration direction of the vibrating motor; the fine particle outlet pipe is located at the bottom of the screen box; the cyclone assembly includes: a main feed pipe, horizontally arranged, with one end connected to an external material source; three hydrocyclones, equidistantly connected in parallel along the axial direction of the main feed pipe, each hydrocyclone having a feed inlet, a cylinder, a conical section, and an underflow outlet; a sedimentation tank connected to the overflow pipe for collecting overflow; an underflow pipe connected to the underflow outlet of each hydrocyclone; an overflow pipe connected to the top of the hydrocyclone for discharging overflow; the underflow pipe is connected to the feed inlet of the screen box via a rubber hose.

[0007] As a preferred technical solution of this utility model, the inner wall of the screen box is symmetrically provided with screen mounting grooves on both sides, the upper screen and the lower screen are respectively embedded in the screen mounting grooves, and are fixedly connected to the screen box by detachable upper pressure strips and lower pressure strips; wherein, the upper screen is a polyurethane wear-resistant screen and the lower screen is a manganese steel wear-resistant screen.

[0008] As a preferred embodiment of this utility model, the vibration motor is a linear vibration motor, and there are two of them, symmetrically arranged on both sides of the bottom of the screen box; the vibration direction of the vibration motor is consistent with the extension direction of the coarse particle outlet and the medium particle outlet.

[0009] As a preferred technical solution of this utility model, the main feed pipe is a seamless steel pipe, which is horizontally fixed to the top of the dewatering screen body; one end of it is connected to the outlet of the external material source through a flange, and the other end is connected to the inlet of the three hydrocyclones through a flange; and the three hydrocyclones are arranged in parallel at equal intervals along the axial direction of the main feed pipe; a switch valve is provided between the hydrocyclones and the main feed pipe, and the switch valve is a pneumatic butterfly valve.

[0010] As a preferred embodiment of this utility model, the elastic support column includes an upper support seat, a lower support seat, and a spring; wherein, the upper support seat is fixedly connected to the bottom of the dewatering screen body, the lower support seat is fixedly connected to the top of the frame, and the spring is clamped between the upper support seat and the lower support seat.

[0011] As a preferred embodiment of this utility model, the sedimentation tank is a square tank with an open top, and its bottom is fixedly connected to the top of the screen box by welding, for collecting the fine particle suspension overflowing from the hydrocyclone.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The built-in cyclone assembly can pre-centrifugally classify the material entering the dewatering screen: coarse particles enter the upper screen directly as the underflow, medium particles are separated by the middle screen, and fine particles enter the sedimentation tank with the overflow. This classification process reduces the load on the vibrating screen, avoids fine particles clogging the screen holes, and allows the vibrating screen to focus on dewatering coarse and medium particles, improving the dewatering efficiency compared to traditional single vibrating screens; 2. The vibrating screen uses two layers of screens made of different materials, one for coarse particles and one for medium particles, to meet the dewatering requirements. The upper screen has a larger aperture to prevent fine particles from being trapped, while the lower screen has high strength to ensure thorough dewatering. Finally, coarse and medium particles are discharged from dedicated outlets, while fine particles are collected in a sedimentation tank, resulting in a finished sand with uniform gradation and stable moisture content. 3. The overflow port of the hydrocyclone is connected to the sedimentation tank through an overflow pipe, which can concentrate and collect fine particles, preventing them from entering the wastewater system with the water flow. The fine particle suspension in the sedimentation tank can be recycled through processes such as pressure filtration and concentration, reducing resource waste; at the same time, the mud content of the wastewater is reduced, and the load and operating costs of subsequent treatment equipment are significantly reduced. 4. The upper polyurethane screen is wear-resistant and impact-resistant, suitable for frictional environments with coarse particles; the lower manganese steel screen has high strength and toughness, and can withstand the impact of long-term high-frequency vibration of medium particles. Combined with the detachable upper and lower pressure bars, screen replacement is convenient and maintenance costs are low. Furthermore, the elastic support columns effectively buffer the vibration of the vibrating screen during operation, reducing impact on the frame and making the equipment operate more stably. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is a top view of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the present invention; In the diagram: 1. Frame; 2. Dewatering screen body; 3. Cyclone assembly; 4. Elastic support column; 21. Screen box; 22. Upper screen; 23. Lower screen; 24. Vibrating motor; 25. Coarse particle outlet; 26. Medium particle outlet; 27. Fine particle water outlet pipe; 28. Feed inlet; 31. Main feed pipe; 32. Cyclone separator; 33. Sedimentation tank; 34. Underflow pipe; 35. Overflow pipe; 36. Rubber hose; 37. Switch valve; 41. Upper support base; 42. Lower support base; 43. Spring; 211. Screen mounting groove; 221. Upper pressure bar; 222. Lower pressure bar; 321. Feed inlet; 322. Cylinder; 323. Conical section; 324. Underflow port. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] In the attached diagram, all identical reference numerals refer to the same components.

[0016] Example 1: Standard configuration vibrating dewatering screen with built-in hydrocyclone like Figure 1-4 As shown, this utility model provides a vibrating dewatering screen with a built-in hydrocyclone. The connection relationship and function of each component are as follows: The frame 1 is a metal frame structure, serving as the foundation support for the equipment. The dewatering screen body 2 is elastically connected to the frame 1 through four elastic support columns 4: the upper support seat 41 of each elastic support column 4 is fixedly connected to the bottom of the dewatering screen body 2 by bolts, and the lower support seat 42 is fixedly connected to the top of the frame 1 by anchor bolts. A spring 43 is clamped between the upper support seat 41 and the lower support seat 42 to buffer the vibration of the vibrating screen during operation and reduce the impact on the frame 1.

[0017] Please see Figure 4 The core of the dewatering screen body 2 is the screen box 21, which has an opening at the top and a feed inlet 28. The inner wall of the screen box 21 has symmetrical screen mounting grooves 211 on both sides. The upper screen 22 (polyurethane wear-resistant material) and the lower screen 23 (manganese steel wear-resistant material) are respectively embedded in the corresponding screen mounting grooves 211. The upper screen 22 is connected to the screen box 21 by a detachable upper pressure strip 221 (bolted), and the lower screen 23 is connected to the screen box 21 by a detachable lower pressure strip 222 (snap fastener), which facilitates quick replacement of the screen after wear.

[0018] Two linear vibrating motors 24 are fixed at the bottom of the screen box 21 at an incline. The vibration direction is consistent with the extension direction of the coarse particle discharge port 25 and the medium particle discharge port 26 at the lower front wall of the screen box 21 (both are forward along the length of the screen box 21). After the material is screened, coarse particles (particle size ≥ 2 mm) move along the upper screen 22 to the coarse particle discharge port 25 and are discharged; medium particles (particle size 0.5-2 mm) pass through the upper screen 22 and move along the lower screen 23 to the medium particle discharge port 26 and are discharged; fine particles (particle size ≤ 0.5 mm) and water pass through the lower screen 23 and are discharged from the fine particle water outlet pipe 27 at the bottom of the screen box 21.

[0019] Please see Figure 3-4 The cyclone assembly 3 is integrated inside the upper part of the screen box 21. The main feed pipe 31 is a horizontal seamless steel pipe. One end is connected to the outlet of the external material source through a flange, and the other end is connected to the inlet 321 of the three hydrocyclones 32 through a flange. The adjacent hydrocyclones 32 are equidistantly distributed along the axial direction of the main feed pipe 31. Each hydrocyclone 32 consists of an inlet 321, a cylinder 322, a conical section 323, and an underflow port 324. After the material enters the hydrocyclone 32 through the main feed pipe 31, due to centrifugal force, coarse particles are discharged from the underflow port 324 and connected to the inlet 28 of the screen box 21 through the underflow pipe 34 and the rubber hose 36. Fine particles are discharged from the top of the hydrocyclone 32 through the overflow pipe 35 into the sedimentation tank 33 (a square tank with an open top, and the bottom is fixedly connected to the top of the screen box 21 by welding). A pneumatic butterfly valve 37 is installed between the hydrocyclone 32 and the main feed pipe 31 to regulate the material flow rate entering each hydrocyclone and ensure the uniformity of classification. After optimization, the cone angle of the hydrocyclone is increased to 20° to improve the separation efficiency of medium particles. The mesh size of the upper screen is adjusted to 8 mesh to reduce fine particle residue. The mesh size of the lower screen is adjusted to 16 mesh to ensure the dewatering effect. At the same time, the risk of clogging is reduced by the selection of materials (wear-resistant polyurethane).

[0020] Example 2: Enhanced grading type vibrating dewatering screen with built-in hydrocyclone This embodiment optimizes the grading efficiency of the cyclone assembly 3 based on the standard model. The main improvement lies in the layout of the cyclone separator 32 and the screen parameters. The connection relationship of the remaining components is the same as in Embodiment 1.

[0021] The three hydrocyclones 32 of the hydrocyclone assembly 3 are arranged equidistantly along the axial direction of the main feed pipe 31 (the spacing is reduced to 150 mm). The cone angle of the cone section 323 of each hydrocyclone 32 is increased to 20° (originally 15°), which enhances the separation capacity of medium-sized particles (0.5-1 mm in diameter). A guide plate (formed by bending the main feed pipe 31 itself) is added to one end of the main feed pipe 31 near the hydrocyclone 32 to guide the material to enter the inlet 321 of each hydrocyclone 32 evenly, avoiding fluctuations in dewatering efficiency caused by uneven flow distribution.

[0022] The mesh size of the upper screen 22 (polyurethane wear-resistant screen) in the screen box 21 is adjusted to 8 mesh (originally 6 mesh) to increase the interception accuracy of coarse particles (particle size ≥ 2mm) and reduce the residue of fine particles (particle size ≤ 1mm); the mesh size of the lower screen 23 (manganese steel wear-resistant screen) is adjusted to 16 mesh (originally 12 mesh) to enhance the dewatering effect on medium particles (particle size 0.5-1mm) and ensure that the moisture content of medium particles discharged is ≤ 15%.

[0023] Example 3: Compact Vibrating Dewatering Screen with Built-in Hydrocyclone This embodiment is designed for a manufactured sand production line with limited space, focusing on optimizing equipment compactness. The connection relationships of other components are the same as in Embodiment 1.

[0024] The main feed pipe 31 of the cyclone assembly 3 is arranged vertically downward at 15° (originally horizontal). The cyclone separators 32 are arranged equidistantly along the axial direction of the main feed pipe 31 (180mm spacing). The underflow port 324 is directly connected to the feed port 28 of the screen box 21 by shortening the length of the underflow pipe 34 (eliminating part of the intermediate bend), reducing the length of the rubber hose 36 (only retaining a 500mm buffer section), and further reducing the height of the equipment.

[0025] In the lower part of the front wall of the screen box 21 of the dewatering screen body 2, the coarse particle discharge port 25 and the medium particle discharge port 26 are combined into a stepped discharge port (achieved by adjusting the bending angle of the discharge port edge). Coarse particles (particle size ≥ 2mm) are discharged from the higher discharge port, and medium particles (particle size 0.5-2mm) are discharged from the lower discharge port, reducing the space occupied by the discharge ports. The spring 43 of the elastic support column 4 adopts a high-stiffness model, which reduces the vibration amplitude of the screen box 21 while ensuring the shock absorption effect, and adapts to stable operation in small space scenarios. Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vibrating dewatering screen with a built-in hydrocyclone, characterized in that, include: The frame (1); the dewatering screen body (2), installed on the frame (1), is elastically connected to the frame (1) by four elastic support columns (4); the cyclone assembly (3), installed on the top of the screen box (21) of the dewatering screen body (2), is used for pre-grading and solid-liquid separation of materials; the screen box (21) has screen mounting grooves (211) on both sides of the inner wall of the screen box (21); the dewatering screen body (2) includes: the screen box (21), which is a rectangular box with an open top and a feed inlet (28) on the top; the upper screen (22) and the lower screen (23), which are laid horizontally in the screen box (21); the vibration motor (24), which is inclinedly fixed to the bottom of the screen box (21); the coarse particle outlet (25) and the medium particle outlet (26), which are respectively set on the lower part of the front wall of the screen box (21) and along the vibration motor (25). 4) The vibration direction extends; the fine particle outlet pipe (27) is opened at the bottom of the screen box (21); the cyclone assembly (3) includes: a main feed pipe (31) which is set horizontally and one end is connected to an external material source; three hydrocyclones (32) which are connected in parallel at equal intervals along the axial direction of the main feed pipe (31), each hydrocyclone (32) having a feed inlet (321), a cylinder (322), a cone section (323) and an underflow outlet (324); an underflow pipe (34) which is connected to the underflow outlet (324) of the hydrocyclone (32); an overflow pipe (35) which is connected to the top of the hydrocyclone (32) for discharging overflow; a sedimentation tank (33) which is connected to the overflow pipe (35) for collecting overflow; the underflow pipe (34) is connected to the feed inlet (28) of the screen box (21) through a rubber hose (36).

2. The vibrating dewatering screen with a built-in hydrocyclone according to claim 1, characterized in that, The screen mounting groove (211) is symmetrically arranged on both sides of the inner wall of the screen box (21). The inner side of the mounting groove (211) is provided with an upper pressure strip (221) and a lower pressure strip (222). The upper screen (22) and the lower screen (23) are respectively embedded in the screen mounting groove (211) and are fixedly connected to the screen box (21) through the upper pressure strip (221) and the lower pressure strip (222). The upper screen (22) is a polyurethane wear-resistant screen and the lower screen (23) is a manganese steel wear-resistant screen.

3. A vibrating dewatering screen with a built-in hydrocyclone according to claim 1, characterized in that, The vibration motor (24) is a linear vibration motor, and there are two of them, which are symmetrically arranged on both sides of the bottom of the screen box (21). The vibration direction of the vibration motor (24) is consistent with the extension direction of the coarse particle outlet (25) and the medium particle outlet (26).

4. A vibrating dewatering screen with a built-in hydrocyclone according to claim 1, characterized in that, The main feed pipe (31) is a seamless steel pipe, which is horizontally fixed to the top of the dewatering screen body (2). One end of it is connected to the outlet of the external material source through a flange, and the other end is connected to the inlet (321) of the three hydrocyclones (32) through a flange. The three hydrocyclones (32) are arranged in parallel at equal intervals along the axial direction of the main feed pipe (31). A switch valve (37) is provided between the hydrocyclones (32) and the main feed pipe (31). The switch valve (37) is a pneumatic butterfly valve.

5. A vibrating dewatering screen with a built-in hydrocyclone according to claim 1, characterized in that, The elastic support column (4) includes an upper support seat (41), a lower support seat (42), and a spring (43); wherein the upper support seat (41) is fixedly connected to the bottom of the dewatering screen body (2), the lower support seat (42) is fixedly connected to the top of the frame (1), and the spring (43) is sandwiched between the upper support seat (41) and the lower support seat (42).

6. A vibrating dewatering screen with a built-in hydrocyclone according to claim 1, characterized in that, The sedimentation tank (33) is a square tank with an open top, and its bottom is fixedly connected to the top of the screen box (21) by welding. It is used to collect the fine particle suspension overflowing from the hydrocyclone.

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