CN218743180U

CN218743180U - Double-layer fine screen

Info

Publication number: CN218743180U
Application number: CN202222985438.2U
Authority: CN
Inventors: 李瑞勇
Original assignee: Wuyuan County Jinmai Promotion Technology Co ltd
Current assignee: Wuyuan County Jinmai Promotion Technology Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-03-28
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a double-layer fine screening sieve, which comprises a frame, wherein two rotating shafts are arranged on the frame, two L-shaped rocker arms are arranged on each rotating shaft, the middle parts of the L-shaped rocker arms are rotatably arranged on the rotating shafts, one ends of the L-shaped rocker arms are hinged with the side wall of a driving sieve bed, the other ends of the L-shaped rocker arms are hinged with the side wall of a driven sieve bed, and the driven sieve bed is arranged below the driving sieve bed; the frame is provided with an excitation mechanism, and the excitation mechanism comprises an excitation motor, a driven shaft, an eccentric bearing, a vibration pull rod and a vibration shaft; the vibration shaft is rotationally arranged on the driving sieve bed. The advantage lies in, the drive sieve bed is direct by the drive of excitation mechanism, drives driven sieve bed through L type rocking arm transmission and sieves the material with the reciprocating motion mode opposite with the drive sieve bed, realizes that the material passes through twice screening under a power drive drives, improves the precision of screening, avoids rewashing sieving, has improved screening efficiency.

Description

Double-layer fine screen

The technical field is as follows:

the utility model relates to a hierarchical screening installation especially relates to a double-deck fine screen.

Background art:

the classifying screen is a mechanical device for classifying materials. Traditional classifying screen can only carry out a screening to the material, when screening effect is not good, then need sieve again, and the material need adopt artifical or mechanical mode when rewashing the sieve, in the classifying screen that the material that will carry out the screening adds again, will cause the damage of material, reduces the screening rate of material, has increased the screening flow simultaneously, has reduced screening efficiency.

The utility model has the following contents:

an object of the utility model is to provide a double-deck fine screen that screening precision is high.

The utility model discloses implement by following technical scheme: the double-layer fine screening machine comprises a rack, wherein two parallel rotating shafts are horizontally arranged on the rack, two L-shaped rocker arms are rotatably arranged on each rotating shaft, the middle part of each L-shaped rocker arm is rotatably arranged on the corresponding rotating shaft, one end of each L-shaped rocker arm is hinged with the side wall of a driving screening bed, the other end of each L-shaped rocker arm is hinged with the side wall of a driven screening bed, and the driven screening bed is arranged below the driving screening bed; the machine frame is provided with an excitation mechanism, and the excitation mechanism comprises an excitation motor, a driven shaft, an eccentric bearing, a vibration pull rod and a vibration shaft; the excitation motor is fixed on the rack; the driven shaft is rotatably arranged on the rack and is parallel to the rotating shaft; the excitation motor is in transmission connection with the driven shaft; two eccentric bearings are rotatably arranged on the driven shaft; each eccentric bearing is fixedly hinged with a vibration pull rod which is perpendicular to the rotating shaft; the other ends of the two vibration pull rods are respectively and rotatably fixed on the vibration shaft which is parallel to the driven shaft; the vibration shaft is rotatably arranged on the driving sieve bed, and a feed hopper is arranged on the rack opposite to the vibration excitation mechanism; the discharge hole of the feed hopper is arranged above the screen surface of the driving screen bed; a screen oversize material outlet of the driving screen bed is arranged on the side wall of the driving screen bed adjacent to the excitation mechanism and is arranged above the screen surface of the driven screen bed; a screen underflow discharge port of the driving screen bed is formed in the bottom of the driving screen bed adjacent to the excitation mechanism, a cloth bag is arranged on the screen underflow discharge port of the driving screen bed, and the discharge port of the cloth bag is arranged in a cavity below the screen surface of the driven screen bed; and a material outlet of the driven sieve bed for oversize materials and a material outlet of the driven sieve bed for undersize materials are arranged on the side wall of the driven sieve bed below the feed hopper.

Preferably, a shaft sleeve made of a metal material is rotatably sleeved on the vibration pull rod, and the shaft sleeve is rotatably arranged on the vibration shaft.

The utility model has the advantages that: compared with the prior art, the driving sieve bed is directly driven by the excitation mechanism, the driven sieve bed is driven by the transmission of the L-shaped rocker arm to sieve materials in a reciprocating motion mode opposite to that of the driving sieve bed, so that the materials are sieved twice under the driving of one power, the sieving precision is improved, the backwashing and sieving are avoided, and the sieving efficiency is improved; all do not have damping spring to cushion between drive sieve bed and driven sieve bed and frame, reduced the consumptive material and the maintenance work volume of equipment, the life cycle of extension equipment reduces the cost that equipment used.

Description of the drawings:

fig. 1 is a schematic view of the entire structure of embodiment 1.

Fig. 2 is a schematic view of the overall structure of the excitation mechanism.

Fig. 3 is a schematic view of the connection between the vibration rod and the vibration shaft.

The specific implementation mode is as follows:

example (b): as shown in fig. 1, the double-layer fine screening sieve comprises a frame 1, wherein two parallel rotating shafts 11 are horizontally arranged on the frame 1, and four rotating shafts 11 on two fixed beams 11 are distributed at four corners; two L-shaped rocker arms 2 are rotatably arranged on each rotating shaft 11, the middle part of each L-shaped rocker arm 2 is rotatably arranged on the corresponding rotating shaft 11, one end of each L-shaped rocker arm 2 is hinged with the side wall of the driving sieve bed 3, and the other end of each L-shaped rocker arm 2 is hinged with the side wall of the driven sieve bed 4; the frame 1 is provided with an excitation mechanism 5, and as shown in fig. 2 and 3, the excitation mechanism 5 comprises an excitation motor 51, a driven shaft 52, an eccentric bearing 53, a vibration pull rod 54 and a vibration shaft 55; the exciting motor 51 is fixed on the frame 1; the driven shaft 52 is rotatably arranged on the frame 1, and the driven shaft 52 is horizontally arranged and is vertical to the fixed beam 11; the excitation motor 51 is in transmission connection with the driven shaft 52; two eccentric bearings 53 are rotatably arranged on the driven shaft 52; a vibration pull rod 54 which is arranged in parallel with the fixed beam 11 is hinged and fixed on each eccentric bearing 53; the other ends of the two vibration pull rods 54 are respectively and rotatably fixed on a vibration shaft 55 which is arranged in parallel with the driven shaft 52; the vibration shaft 45 is rotatably arranged on the driving sieve bed 3, a shaft sleeve 56 made of metal material is rotatably sleeved on the vibration pull rod 52, and the shaft sleeve 56 is rotatably arranged on the vibration shaft 55;

a feed hopper 6 is arranged on the frame 1 opposite to the excitation mechanism 5; the discharge hole of the feed hopper 6 is arranged above the screen surface of the driving sieve bed 3; a screen oversize material outlet 31 of the driving screen bed is arranged on the side wall of the driving screen bed 3 adjacent to the excitation mechanism 5, and the screen oversize material outlet 31 of the driving screen bed is arranged above the screen surface of the driven screen bed 4; a driving sieve bed undersize discharge port 32 is formed in the bottom of the driving sieve bed 3 adjacent to the excitation mechanism 5, a cloth bag 7 is arranged on the driving sieve bed undersize discharge port 32, and a discharge port of the cloth bag 7 is arranged in a cavity below the sieve surface of the driven sieve bed 4 below; and a driven sieve bed oversize material outlet 41 and a driven sieve bed undersize material outlet 42 are arranged on the side wall of the driven sieve bed 4 below the feed hopper 6.

Instructions for use: the material falls through feeder hopper 5 the screening is carried out on the sifting surface of drive sieve bed 3, when excitation mechanism 4 drove 3 reciprocating motion of drive sieve bed, under the transmission of L type rocking arm 2, driven sieve bed 4 sieves the material with the reciprocating motion mode opposite with drive sieve bed 3, realizes that the material passes through twice screening under a actuating mechanism drives, has improved the precision of material screening.

Claims

1. The double-layer fine screening machine is characterized by comprising a rack, wherein two parallel rotating shafts are horizontally arranged on the rack, two L-shaped rocker arms are rotatably arranged on each rotating shaft, the middle part of each L-shaped rocker arm is rotatably arranged on the corresponding rotating shaft, one end of each L-shaped rocker arm is hinged with the side wall of a driving screening bed, the other end of each L-shaped rocker arm is hinged with the side wall of a driven screening bed, and the driven screening bed is arranged below the driving screening bed; the machine frame is provided with an excitation mechanism, and the excitation mechanism comprises an excitation motor, a driven shaft, an eccentric bearing, a vibration pull rod and a vibration shaft; the excitation motor is fixed on the rack; the driven shaft is rotatably arranged on the rack and is parallel to the rotating shaft; the excitation motor is in transmission connection with the driven shaft; two eccentric bearings are rotatably arranged on the driven shaft; each eccentric bearing is fixedly hinged with a vibration pull rod which is perpendicular to the rotating shaft; the other ends of the two vibration pull rods are respectively and rotatably fixed on the vibration shaft parallel to the driven shaft; the vibration shaft is rotatably arranged on the driving sieve bed, and a feed hopper is arranged on the rack opposite to the excitation mechanism; the discharge hole of the feed hopper is arranged above the screen surface of the driving screen bed; the side wall of the driving sieve bed adjacent to the excitation mechanism is provided with a material outlet of oversize products of the driving sieve bed, and the material outlet of the oversize products of the driving sieve bed is arranged above the sieve surface of the driven sieve bed; a screen underflow discharge port of the driving screen bed is formed in the bottom of the driving screen bed adjacent to the excitation mechanism, a cloth bag is arranged on the screen underflow discharge port of the driving screen bed, and the discharge port of the cloth bag is arranged in a cavity below the screen surface of the driven screen bed below the cloth bag; and a material outlet of the driven sieve bed for oversize materials and a material outlet of the driven sieve bed for undersize materials are arranged on the side wall of the driven sieve bed below the feed hopper.

2. The double-deck fine screen of claim 1, wherein a bushing made of a metal material is rotatably fitted over the vibration lever, the bushing being rotatably disposed on the vibration shaft.