Automatic discharge multi-layer screening device and method

Abstract

The application discloses an automatic discharging multi-layer screening device and method, and belongs to the technical field of screening machines. The device comprises elastic mechanisms and lifting mechanisms which are arranged on the front and back sides of a rack respectively, a multi-layer screening box which is movably connected with the elastic mechanisms and the lifting mechanisms through connecting rods, and eccentric rotating mechanisms which are arranged on the left and right sides of the multi-layer screening box and located between the elastic mechanisms and the lifting mechanisms. The two eccentric rotating mechanisms are connected through a connecting shaft which penetrates the bottom of the multi-layer screening box. The lifting of one side of the multi-layer screening box and the movement of the multi-layer screening box in the circumferential direction which are driven by the two eccentric rotating mechanisms are controlled by a control mechanism. The device can screen and discharge a large amount of materials at one time, reduces the labor intensity of operators, improves the screening efficiency, increases the activity range of the materials during screening, and fully screens materials in various forms.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of screening machines, and particularly relates to an automatic discharging multi-layer screening device and method. BACKGROUND

[0002] A screening machine is a vibrating screening mechanical device that utilizes the relative movement of granular materials and a screen surface to make part of the particles pass through the screen holes, so that the materials are divided into different levels according to the particle size. It can be widely applied to industries such as coal, ore, power generation, chemical industry, coking, steel, papermaking, grain and metal, etc. for coarse and fine separation of materials. At present, the existing screening machines mainly include fixed screens, drum screens and vibrating screens. The fixed screens and drum screens are rarely selected as screening equipment because of low screening efficiency, small working area and low productivity. Most of the screening equipment is vibrating screens, among which the linear vibrating screens are widely used. The screen surface of the linear vibrating screen is generally designed to be inclined. The greater the inclination of the screen surface, the faster the material flow speed. The screening and discharging can be performed simultaneously, and the screening effect can meet the production requirements of most products. However, due to the design of the inclined screen surface, too much material cannot be added at one time. The material needs to be added in small quantities and multiple times by manual operation at the screening machine, which consumes a large amount of labor and increases the screening time. In addition, due to the linear vibration movement mode, the activity range of the material is small. When the material is sticky and wet (generally with a moisture content of more than 6%), the screen holes are easily blocked, which affects the screening effect. Therefore, there is a need for an automatic discharging multi-layer screening device and method that can screen and separate a large amount of material at one time and increase the activity range of the material during screening. SUMMARY

[0003] The purpose of the present application is to provide an automatic discharging multi-layer screening device and method that can screen and separate a large amount of material at one time and automatically discharge, reduce the labor intensity of the operator, improve the screening efficiency, and increase the vibration activity range of the material during screening, so that various forms of material can be fully screened.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0005] An automatic discharging multi-layer screening device, characterized in that it comprises a corresponding elastic mechanism and a lifting mechanism arranged on the front and rear sides of a rack respectively, a multi-layer screening box connected with the elastic mechanism and the lifting mechanism through connecting rods, and eccentric rotating mechanisms arranged on the left and right sides of the multi-layer screening box. The two eccentric rotating mechanisms are connected through a connecting shaft penetrating the bottom of the multi-layer screening box. The connecting shaft is arranged along the central axis of the bottom surface of the multi-layer screening box and connected with the two eccentric rotating mechanisms through bearings arranged on both ends. The lifting of one side of the multi-layer screening box and the circumferential movement of the multi-layer screening box driven by the two eccentric rotating mechanisms are controlled by a control mechanism. The height of the lifting mechanism at the lowest position is the same as the natural elongation of the elastic mechanism.

[0006] The further improvement of the technical scheme of the present application is that the multi-layer screening box comprises a box body, an upper cover arranged at the top of the box body and provided with a discharge port at one side, and a bottom plate arranged at the bottom of the box body, the bottom plate is connected with the connecting shaft through a through hole arranged along the central axis thereof, and the discharge port is arranged at the side close to the lifting mechanism.

[0007] The further improvement of the technical scheme of the present application is that a plurality of screening layers provided with screens with different aperture sizes are arranged in the box body, the aperture sizes of the screens of the screening layers gradually decrease from top to bottom, the side of the box body close to the elastic mechanism is provided with discharge ports corresponding to the screening layers, each discharge port is provided with a discharge plate corresponding to the screen, the discharge plates of adjacent two discharge ports are staggered, and a sliding baffle is arranged on the discharge port.

[0008] The further improvement of the technical scheme of the present application is that the discharge plate is arranged in a shape of large at the top and small at the bottom, and a baffle is arranged at both sides of the discharge plate, the upper end of the discharge plate is connected with the lower end of the discharge port, and the lower end of the discharge plate is connected with the collecting device.

[0009] The further improvement of the technical scheme of the present application is that the elastic mechanism is a reset spring group symmetrically arranged at one side of the bottom plate through a connecting rod, and the lifting mechanism is a lifting cylinder group corresponding to the reset spring group and arranged at the other side of the bottom plate through a connecting rod.

[0010] The further improvement of the technical scheme of the present application is that the eccentric rotating mechanism comprises a bracket provided with a through hole and an eccentric wheel connected with the control mechanism through a transmission shaft penetrating the through hole of the bracket, and the transmission shaft is connected with the through hole of the bracket through bearings arranged at both sides of the through hole of the bracket.

[0011] The further improvement of the technical scheme of the present application is that the eccentric wheel is connected with the bearing at the end of the connecting shaft through an output shaft eccentrically arranged on the eccentric wheel.

[0012] An automatic discharging multi-layer screening method comprises the following operation steps: step S1, opening the upper cover of the multi-layer screening box, adding materials once, covering the upper cover, and waiting for screening; step S2, adjusting the lifting cylinder group to the lowest position and the natural elongation of the reset spring group to be just flat, so that the multi-layer screening box is kept horizontal; step S3, opening the control mechanism to drive the eccentric rotating mechanism to rotate and drive the multi-layer screening box to do circular reciprocating motion to uniformly shake the screening of the materials, so that different sizes of screening materials are left on each screen; step S4, after the screening is completed, the sliding baffle of the discharge port is opened, and the collecting device is connected at the lower end of the discharge plate; step S5, adjusting the lifting cylinder group to rise so that the multi-layer screening box tilts to one side with the connecting shaft as the fulcrum, at this time, the reset spring group is compressed, and the screening materials enter the collecting device through the discharge port; and step S6, after the discharging is completed, adjusting the lifting cylinder group to descend so that the multi-layer screening box returns to the horizontal state with the connecting shaft as the fulcrum, at this time, the reset spring group resets.

[0013] With the above technical scheme, the application has the following technical progress: a large amount of material can be layered and screened at one time and automatically discharged; the eccentric rotating mechanism increases the vibration range of the material screening, so that various forms of material can be fully screened; the operation is simple, the labor amount is reduced, the screening efficiency is improved, and the screening effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the automatic discharge multi-layer screening device of the application;

[0015] Figure 2 is a structural schematic view of the multi-layer screening box of the automatic discharge multi-layer screening device of the application;

[0016] Among them, 1, multi-layer screening box, 2, connecting shaft, 3, connecting rod, 4, reset spring group, 5, lifting oil cylinder group, 6, support, 7, transmission shaft, 8, eccentric wheel, 9, output shaft, 10, rack, 1-1, box body, 1-2, upper cover, 1-3, bottom plate, 1-4, discharge port, 1-5, screening layer, 1-6, discharge port, 1-7, discharge plate. DETAILED DESCRIPTION

[0017] The application will be further described in detail below in combination with embodiments:

[0018] As shown in Figure 1 , an automatic discharge multi-layer screening device comprises a matching elastic mechanism and a lifting mechanism arranged on the front and rear sides of a rack 10 respectively, a multi-layer screening box 1 connected with the elastic mechanism and the lifting mechanism through connecting rods 3 respectively, and an eccentric rotating mechanism arranged on the left and right sides of the multi-layer screening box 1. The two eccentric rotating mechanisms are connected through a connecting shaft 2 penetrating the bottom of the multi-layer screening box 1. The connecting shaft 2 is arranged along the central axis of the bottom surface of the multi-layer screening box 1 and connected with the two eccentric rotating mechanisms through bearings arranged on both ends. The lifting of one side of the multi-layer screening box 1 and the circumferential movement of the multi-layer screening box 1 driven by the two eccentric rotating mechanisms are controlled by a control mechanism. The height of the lifting mechanism at the lowest position is the same as the natural elongation of the elastic mechanism. When the lifting mechanism drives one side of the multi-layer screening box 1 to be lifted, the elastic mechanism is compressed, and the multi-layer screening box 1 is tilted to one side. When the lifting mechanism drives one side of the multi-layer screening box 1 to be lowered back to the original position, the elastic mechanism is reset, and the multi-layer screening box 1 remains horizontal.

[0019] The lifting mechanism can adopt a lifting oil cylinder, a gear and rack structure, a worm and gear structure, and other mechanisms with lifting function. The elastic mechanism can adopt a reset spring, an elastic telescopic rod, and other mechanisms with elastic telescopic function. The control mechanism can adopt a motor or a hydraulic motor with power output function.

[0020] AsFigure 2 As shown, the multi-layer screening box 1 comprises a box body 1-1, an upper cover 1-2 arranged on the top of the box body 1-1 and provided with a discharge port 1-4 on one side, and a bottom plate 1-3 arranged at the bottom of the box body 1-1, the bottom plate 1-3 is connected with the connecting shaft 2 through a through hole opened along the central axis thereof, the discharge port 1-4 is arranged on the side close to the lifting mechanism and is controlled to open and close by a cover, and the box body 1-1 can be arranged in the form of a cube, a cylinder or a cuboid, preferably, the box body in the form of a cuboid is adopted in the present application.

[0021] A plurality of screening layers 1-5 provided with different aperture screens are arranged in the box body 1-1, each screening layer 1-5 has a certain height, and the height of the top screening layer 1-5 is greater than that of the other screening layers, so that the entire multi-layer screening box 1 has a large accommodation space and can accommodate a large amount of material to be screened, the aperture of the screen of each screening layer 1-5 decreases from top to bottom, and the shape of the screen hole of each screening layer 1-5 can be arranged in the same or different shape according to the use requirement.

[0022] The box body 1-1 is provided with a discharge port 1-6 corresponding to each screening layer 1-5 on the side close to the elastic mechanism, the discharge port 1-6 is provided with a discharge plate 1-7 corresponding to the screen on each discharge port 1-6, and the discharge plates 1-7 of adjacent two discharge ports are staggered with each other, a sliding baffle capable of opening or closing the discharge port 1-6 is arranged on the discharge port 1-6, and the upper and lower sides of the discharge port 1-6 are correspondingly provided with a sliding groove and a sliding rail or. The discharge plate 1-7 is arranged in the shape of large at the top and small at the bottom, and the both sides of the discharge plate 1-7 are provided with a baffle in the form of a groove, the upper end of the discharge plate 1-7 is connected with the lower end of the discharge port 1-6, and the lower end of the discharge plate 1-7 is connected with a collecting device.

[0023] The elastic mechanism adopts a reset spring group 4 symmetrically arranged on the front side of the bottom plate 1-3 through a connecting rod 3, and the lifting mechanism adopts a lifting cylinder group 5 corresponding to the reset spring group 4 arranged on the rear side of the bottom plate 1-3 through a connecting rod 3. Preferably, the reset spring group 4 comprises two reset springs symmetrically arranged, the lifting cylinder group 5 comprises two lifting cylinders symmetrically arranged, and the two reset springs and the two lifting cylinders are symmetrically arranged with each other.

[0024] The eccentric rotating mechanism comprises a bracket 6 provided with a through hole and an eccentric wheel 8 connected with the control mechanism through a transmission shaft 7 penetrating the through hole of the bracket 6, the transmission shaft 7 is connected with the through hole on the bracket 6 through bearings arranged on both sides of the through hole of the bracket 6, and the eccentric wheel 8 is connected with the bearing at the end of the connecting shaft 2 through an output shaft 9 eccentrically arranged on the eccentric wheel 8.

[0025] An automatic discharging multi-layer screening method comprises the following operation steps:

[0026] Step S1: open the upper cover 1-2 of the multi-layer screening box, add the material once, cover the upper cover 1-2 and wait for screening;

[0027] Step S2: Adjust the lifting cylinder group 5 to the lowest position so that it is just equal to the natural extension of the return spring group 4 so that the multi-layer screening box 5 remains horizontal;

[0028] Step S3: turning on the control mechanism to drive the eccentric rotating mechanism to rotate and drive the multi-layer screening box 1 to perform circular reciprocating motion to vibrate the material in a large and uniform manner, so that different sizes of screening materials are left on each screen;

[0029] Step S4: After the screening is completed, the sliding baffle of the discharge port 1-6 is opened, and a collecting device is connected to the lower end of the discharge plate 1-7;

[0030] Step S5: Regulate the lifting cylinder group 5 to make the multi-layer screening box 1 tilt to one side with the connecting shaft 2 as the fulcrum. At this time, the return spring group 4 is compressed, and the screened material enters the collection device through the discharge port 1-6;

[0031] Step S6: After the discharge is completed, the lifting cylinder group 5 is adjusted to descend so that the multi-layer screening box 1 returns to a horizontal state with the connecting shaft 2 as a fulcrum, and at this time the reset spring group 4 is reset.

[0032] This operation method can screen a large amount of materials at one time and then automatically discharge them, which reduces the operator's workload, improves screening efficiency and has a good screening effect.

[0033] At the same time, the present invention can also screen a small amount of material in multiple times, and automatically discharge the material while screening, including the following operating steps:

[0034] Step S1: Regulate the lifting cylinder group 5 to rise, so that the multi-layer screening box 1 tilts to one side with the connecting shaft 2 as the fulcrum, and the return spring group 4 is compressed at this time;

[0035] Step S2: Open the sliding baffle of the discharge port 1-6 and connect the collecting device to the lower end of the discharge plate 1-7;

[0036] Step S3: continuously adding a small amount of material through the discharge port 1-6 provided on the upper cover 1-2;

[0037] Step S4: Turn on the control mechanism to drive the eccentric rotating mechanism to rotate and drive the multi-layer screening box 1 to perform circular reciprocating motion to vibrate the material evenly and significantly. The screened material left on each screen enters the collection device through the discharge ports 1-6;

[0038] Step S5: After the screening is completed, the lifting cylinder group 5 is adjusted to descend so that the multi-layer screening box returns to a horizontal state with the connecting shaft 2 as a fulcrum, and at this time the reset spring group 4 is reset.

[0039] It is to be understood that the present application is described by way of example only, and that modifications or alterations can be made to the features and embodiments described without departing from the spirit and scope of the application. In addition, modifications can be made to the features and embodiments described to accommodate specific situations and materials without departing from the spirit and scope of the application. Accordingly, the application is not limited to the specific embodiments disclosed herein, but rather, the scope of the application includes all embodiments falling within the scope of the claims.

Claims

1. A screening method for an automatic discharging multi-layer screening device, characterized in that: The structure of the automatic discharging multi-layer screening device comprises a platform (10), a matching elastic mechanism and a lifting mechanism respectively arranged on the front and rear sides of the platform (10), a multi-layer screening box (1) movably connected to the elastic mechanism and the lifting mechanism through a connecting rod (3), and an eccentric rotating mechanism correspondingly arranged on the left and right sides of the multi-layer screening box (1). The two eccentric rotating mechanisms are connected by a connecting shaft (2) passing through the bottom of the multi-layer screening box (1). The connecting shaft (2) is arranged along the central axis of the bottom surface of the multi-layer screening box (1) and is connected to the two eccentric rotating mechanisms through bearings sleeved at both ends. The eccentric rotating mechanism is connected, the lifting mechanism drives one side of the multi-layer screening box (1) to rise or fall, and the two eccentric rotating mechanisms cooperate to drive the multi-layer screening box (1) to move in the circumferential direction, which are all controlled by the control mechanism. The height of the lifting mechanism when it is in the lowest position is the same as the natural extension of the elastic mechanism. The multi-layer screening box (1) includes a box body (1-1), an upper cover (1-2) arranged on the top of the box body (1-1) and provided with a discharge port (1-4) on one side, and a bottom plate (1-3) arranged at the bottom of the box body (1-1), and the bottom plate (1-3) is connected to the eccentric rotating mechanism. A through hole opened along its central axis is connected to the connecting shaft (2), and the discharge port (1-4) is arranged on the side close to the lifting mechanism; a plurality of screening layers (1-5) provided with screens of different apertures are arranged in the box body (1-1), and the aperture of the screens of each screening layer (1-5) decreases from top to bottom; a discharge port (1-6) corresponding to each screening layer (1-5) is provided on the side close to the elastic mechanism of the box body (1-1), and each discharge port (1-6) is provided with a discharge plate (1-7) corresponding to the screen, and the discharge plates (1-7) of two adjacent discharge ports are arranged The discharging ports (1-6) are staggered with each other, and a sliding baffle is provided on the discharging port (1-6); the discharging plate (1-7) is arranged in a shape of being larger at the top and smaller at the bottom, and baffles are provided on both sides thereof; the upper end of the discharging plate (1-7) is connected to the lower end of the discharging port (1-6), and the lower end of the discharging plate (1-7) is connected to the collecting device; the elastic mechanism is a return spring group (4) symmetrically arranged on one side of the bottom plate (1-3) through a connecting rod (3), and the lifting mechanism is a lifting cylinder group (5) corresponding to the return spring group (4) and arranged on the other side of the bottom plate (1-3) through a connecting rod (3); The method includes the following steps: Step S1: Open the upper cover (1-2) of the multi-layer screening box, add the materials at one time, then cover the upper cover (1-2) and wait for screening; Step S2: Adjust the lifting cylinder assembly (5) to the lowest position so that it is just equal to the natural extension of the return spring assembly (4) so ​​that the multi-layer screening box (5) remains horizontal; Step S3: turning on the control mechanism to drive the eccentric rotating mechanism to rotate and drive the multi-layer screening box (1) to make a circular reciprocating motion to vibrate the material in a large and uniform manner, so that different sizes of screening materials are left on each screen; Step S4: After the screening is completed, the sliding baffle of the discharge port (1-6) is opened, and a collecting device is connected to the lower end of the discharge plate (1-7); Step S5: Regulate the lifting cylinder group (5) to rise so that the multi-layer screening box (1) tilts to one side with the connecting shaft (2) as the fulcrum. At this time, the return spring group (4) is compressed, and the screened material enters the collection device through the discharge port (1-6); Step S6: After the discharge is completed, the lifting cylinder group (5) is adjusted to descend so that the multi-layer screening box (1) returns to a horizontal state with the connecting shaft (2) as a fulcrum, and at this time the reset spring group (4) is reset.

2. The screening method of the automatic discharging multi-layer screening device according to claim 1, characterized in that: The eccentric rotating mechanism comprises a bracket (6) provided with a through hole and an eccentric wheel (8) connected to a control mechanism via a transmission shaft (7) passing through the through hole of the bracket (6); the transmission shaft (7) is connected to the through hole on the bracket (6) via bearings provided on both sides of the through hole of the bracket (6).

3. The screening method of the automatic discharging multi-layer screening device according to claim 2, characterized in that: The eccentric wheel (8) is connected to the bearing at the end of the connecting shaft (2) via an output shaft (9) eccentrically arranged on the eccentric wheel (8).

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