CN213316206U

CN213316206U - Multistage aggregate screening system

Info

Publication number: CN213316206U
Application number: CN202021269592.4U
Authority: CN
Inventors: 肖洁; 李明翀; 叶红学; 夏金凤; 胡双元; 张飞; 陈小超; 李胜; 李疆儒; 艾桃敏
Original assignee: China Gezhouba Group Co Ltd; China Gezhouba Group Three Gorges Construction Engineering Co Ltd
Current assignee: China Gezhouba Group Co Ltd; China Gezhouba Group Three Gorges Construction Engineering Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-06-01
Anticipated expiration: 2030-07-02

Abstract

A multi-stage aggregate screening system comprises a primary screening machine, a secondary screening machine and an aggregate bin, wherein the primary screening machine and the secondary screening machine are connected through a chute; partitions are arranged on the upper layer chutes at the discharge ports of the primary screening machine and the secondary screening machine; the partition comprises a turning plate, the lower end of the turning plate is installed at the discharge port of the primary screening machine or the secondary screening machine through a rotating shaft, and the turning plate is used for separating the upper-layer chute. The utility model provides a pair of multistage aggregate screening system blocks that aggregate that different grades were joined in marriage and scurries or overflow the storehouse because of the screen cloth vibrations, improves coarse aggregate screening particle diameter and goes out the net qualification rate.

Description

Multistage aggregate screening system

Technical Field

The utility model relates to an aggregate screening machine, especially a multistage aggregate screening system.

Background

And the aggregate screening system for the V970 m positioned in the Wudongde hydropower station is mainly used for producing, transporting and screening dam concrete aggregates. The general coarse aggregate mixed by concrete is divided into the following parts according to the particle size: the aggregate is subjected to multistage screening to ensure the use qualification rate of the aggregate particle size grading, so that the content of various aggregates with super-son diameters is reduced. The aggregate screening system for the size of 970m is divided into first-order screening and second-order screening, wherein the first-order screening mainly screens out medium and small stone aggregates mixed in the extra large stones and the large stones, and the medium and small stone aggregates are correspondingly conveyed to the second-order screening through a chute connected with a screening machine to complete the separation of the extra large stones and the separation of the medium stones and the small stones.

Traditional screening machine is equipped with two ejection of compact chute exports from top to bottom, but ejection of compact chute export does not set up the baffle, and at the screening in-process, the tiny particle aggregate on upper screen cloth still gets into the screen cloth lower floor through the screening because of the violent vibrations of screen cloth and just directly bounces and flies out into the ejection of compact chute on upper strata and follow the large granule aggregate.

For example: when medium and small stone aggregates are screened in a first-order mode, part of the medium and small aggregates which bounce and fly up are made to enter a large stone screening machine for secondary screening together with extra large stones and large stones through an upper discharging chute due to severe vibration of a screen, and finally flow into a large stone bin, so that the large stones are unqualified in diameter and overflow from the bin.

Disclosure of Invention

The utility model aims to solve the technical problem that a multistage aggregate screening system is provided, the son footpath rate and the storehouse condition that overflows after reducing the aggregate screening.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a multi-stage aggregate screening system comprises a primary screening machine, a secondary screening machine and an aggregate bin, wherein the primary screening machine and the secondary screening machine are connected through a chute; partitions are arranged on the upper layer chutes at the discharge ports of the primary screening machine and the secondary screening machine; the partition comprises a turning plate, the lower end of the turning plate is installed at the discharge port of the primary screening machine or the secondary screening machine through a rotating shaft, and the turning plate is used for separating the upper-layer chute.

The rotating shaft extends out of the chute and is provided with a handle.

A first gear is sleeved outside the rotating shaft, one end of the first gear is provided with a pull rod, a spring is sleeved on the pull rod, and the other end of the pull rod freely penetrates through a fixing plate at the end head of the rotating shaft; one side of the first gear is meshed with or separated from the second gear.

The utility model relates to a multistage aggregate screening system has following technological effect:

designing a partition at the outlet chute of an upper screen mesh of the screening machine, before the middle and small stones are screened in the first stage, enabling the middle and small stones to fall onto the chute side baffle by rotating the turnover plate, connecting the chute for partitioning the extra-large stones and the large stones with the first-stage screening machine, and completely dropping the middle and small aggregates on the screen mesh of the first-stage screening machine into the chute for the middle and small stones in the lower layer to prevent part of the middle and small stones from flying into the chute for the extra-large stones and the large stones due to vibration and finally entering the second-stage large stone screening machine; and during second-order screening, the turnover plate is rotated to enable the turnover plate to fall onto the chute side baffle plate, so that the chute is disconnected with the screening machine, and finally, small aggregate enters the corresponding aggregate bin. After a period of time, the partition can be opened to discharge the upper-layer large aggregate, so that the qualification rate of various aggregates is effectively ensured, and the condition of bin overflow is reduced. The device has simple structure and manufacture, easy adjustment and strong field operability.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a front view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a front view of the partition wall (first type) of the present invention.

Fig. 4 is a left side view (first type) of the partition wall of the present invention.

Fig. 5 is a schematic structural diagram of the partition wall according to the present invention (second type).

Fig. 6 is a schematic structural diagram of the partition wall according to the present invention (second type).

In the figure: the device comprises a primary screening machine 1, a secondary screening machine 2, an aggregate bin 3, an upper layer chute 4, a partition 5, a turning plate 5-1, a rotating shaft 5-2, a handle 5-3, a first gear 5-4, a pull rod 5-5, a spring 5-6, a fixing plate 5-7 and a second gear 5-8.

Detailed Description

As shown in fig. 1-2, a multi-stage aggregate screening system comprises a primary screening machine 1, a secondary screening machine 2 and an aggregate bin 3, wherein the primary screening machine 1 and the secondary screening machine 2 are connected with each other through a chute 4; and partitions 5 are arranged on the upper layer chute 4 at the discharge ports of the primary screening machine 1 and the secondary screening machine 2.

As shown in fig. 3-4, the partition 5 comprises a turning plate 5-1, the turning plate 5-1 is a rectangular steel plate with a thickness of 20mm, and the turning plate 5-1 and the rotating shaft 5-2 are welded into a whole. The rotating shaft 5-2 is round steel with the diameter of 38 mm. The rotating shaft 5-2 is arranged at the upper end of the baffle plates at the two sides of the chute 4 and is provided with a hole at the position close to the discharge port of the primary screening machine 1 or the secondary screening machine 2. The rotating shaft 5-2 extends out of the chute 4 and is provided with a handle 5-3, and the handle 5-3 is processed and bent into a Z shape by prolonging the rotating shaft 5-2 and reducing (reducing the diameter). The turning plate 5-1 is driven to rotate between the screening machine and the chute 4 by rotating the handle 5-3 to drive the rotating shaft 5-2 to rotate left and right, so that aggregates of different grades are prevented from being mixed into the turning plate 5-1 due to vibration of the screen and from flowing down along with the chute 4.

As shown in the figure 5-6, the second partition 5 is formed by replacing a rotating handle 5-3, a first gear 5-4 is sleeved outside a rotating shaft 5-2, one end of the first gear 5-4 is provided with a pull rod 5-5, and the pull rod 5-5 freely penetrates through a fixing plate 5-7 at the end of the rotating shaft 5-2. The first gear 5-4 can be moved along the axis of the rotating shaft 5-2 by pulling the pull rod 5-5. In addition, a limiting plate is fixed on the rotating shaft 5-2 at one side of the first gear 5-4, and a spring 5-6 is sleeved on the pull rod 5-5. In general, the first gear 5-4 is in contact with the limit plate by the action of the spring 5-6. A second gear 5-8 is fixed on the chute outside the first gear 5-4, and the first gear 5-4 and the second gear 5-8 are straight gears.

When the pull rod 5-5 is pulled outwards, the spring 5-6 contracts, the first gear 5-4 moves towards the fixed plate 5-7, and the turning plate 5-1 can rotate freely after the first gear 5-4 and the second gear 5-8 are disengaged. And (3) loosening the pull rod 5-5, resetting the spring 5-6, enabling the first gear 5-4 to be in contact with the limiting plate, and meshing the first gear 5-4 and the second gear 5-8 again to limit the rotation of the turnover plate 5-1.

Claims

1. A multistage aggregate screening system which characterized in that: the screening machine comprises a primary screening machine (1), a secondary screening machine (2) and an aggregate bin (3), wherein the primary screening machine (1) and the secondary screening machine (2) are connected with each other, and the secondary screening machine (2) and the aggregate bin (3) are connected with each other through a chute (4); partitions (5) are arranged on the upper layer chute (4) at the discharge ports of the primary screening machine (1) and the secondary screening machine (2); the partition (5) comprises a turning plate (5-1), the lower end of the turning plate (5-1) is installed at the discharge port of the primary screening machine (1) or the secondary screening machine (2) through a rotating shaft (5-2), and the turning plate (5-1) is used for blocking the upper-layer chute (4).

2. The multi-stage aggregate screening system of claim 1, wherein: the rotating shaft (5-2) extends out of the chute (4) and is provided with a handle (5-3).

3. The multi-stage aggregate screening system of claim 1, wherein: a first gear (5-4) is sleeved outside the rotating shaft (5-2), one end of the first gear (5-4) is provided with a pull rod (5-5), a spring (5-6) is sleeved on the pull rod (5-5), and the other end of the pull rod (5-5) freely penetrates through a fixing plate (5-7) at the end of the rotating shaft (5-2); one side of the first gear (5-4) is meshed with or separated from the second gear (5-8).