CN114074066B

CN114074066B - Lime screening machine

Info

Publication number: CN114074066B
Application number: CN202111184193.7A
Authority: CN
Inventors: 林小元; 邓爱球
Original assignee: Huaihua Xin Feng Peak Calcium Industry Co ltd
Current assignee: Huaihua Xin Feng Peak Calcium Industry Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-12-13
Anticipated expiration: 2041-10-12
Also published as: CN114074066A

Abstract

The invention discloses a lime screening machine which comprises a plurality of circular screening shells which are sequentially communicated through a communication pipeline from top to bottom, wherein a feeding hole is formed in the top of the topmost circular screening shell, and a discharging hole is formed in the bottom of the bottommost circular screening shell; the bottom of each circular screening shell is provided with a filter screen, and the aperture of each filter screen is sequentially reduced from top to bottom; the circular screening casing centre of a circle department installs the pivot, and the pivot is fixed with a plurality of flabellums along circumference, forms the material chamber between the adjacent flabellum. The fan blades drive the materials to move and sieve, the whole process is carried out in a closed space, materials with the diameter larger than the aperture of the filter screen flow out of the material channel by utilizing gravity, the separation of the materials with different particle diameters is realized, the environmental pollution and the injury to workers caused by the overflow of lime powder during sieving are effectively prevented, the filter screen can be automatically cleaned, and the production efficiency is improved.

Description

Lime screening machine

Technical Field

The invention belongs to the field of limestone, and particularly relates to a lime screening machine.

Background

Lime is an air-hardening inorganic gelling material based on calcium oxide. The lime is a product with high calcium carbonate content such as limestone, dolomite, chalk, shell and the like, and is calcined at 900-1100 ℃. After the lime is fired, the requirements on parameters such as calcium oxide content, raw and over-fired rate and the like are high, and the granularity is accurately controlled. Therefore, the materials need to be sieved and divided into materials with different particle sizes. However, the existing screening devices are usually open, so that lime powder is scattered in the screening process. In addition, the filter mesh is easily clogged when the mesh is used, and thus, improvement is required.

Disclosure of Invention

In order to solve the problems, the invention discloses a lime screening machine. The fan blades drive the materials to move and sieve, the whole process is carried out in a closed space, materials with the diameter larger than the aperture of the filter screen flow out of the material channel by utilizing gravity, the separation of the materials with different particle diameters is realized, the environmental pollution and the injury to workers caused by the overflow of lime powder during sieving are effectively prevented, the filter screen can be automatically cleaned, and the production efficiency is improved.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a lime screening machine comprises a plurality of circular screening shells which are sequentially communicated through communicating pipelines from top to bottom, wherein a feeding hole is formed in the top of the circular screening shell at the topmost part, and a discharging hole is formed in the bottom of the circular screening shell at the bottommost part; the bottom of the circular screening shell is provided with filter screens, and the apertures of the filter screens are sequentially reduced from top to bottom; a rotating shaft is arranged at the center of the circular screening shell, a plurality of fan blades are fixed on the rotating shaft along the circumferential direction, and a material cavity is formed between every two adjacent fan blades; a material outlet is formed at the lower part of the side surface of the circular screening shell; the two ends of the filter screen extend out of the circular screening shell and are connected with stretching devices; sucking discs are arranged above the two ends of the filter screen and communicated with a negative pressure pump through a negative pressure pipeline; the rotating shaft is connected with a motor.

In a further improvement, a dust removal cloth bag is arranged at the end part of the negative pressure pipeline.

The improved structure is characterized in that the induction device is a magnetic inductor, gears are mounted on the rotating shafts and are in power connection through chains, and one of the rotating shafts is connected with a motor.

In a further improvement, the stretching device is a cylinder.

In a further improvement, the bottom of the bottommost circular screening shell is provided with support legs.

In a further improvement, the outer end of the material outlet is provided with a raised annular ring.

The invention has the advantages that:

the fan blades drive the materials to move and sieve, the whole process is carried out in a closed space, materials with the diameter larger than the aperture of the filter screen flow out of the material channel by utilizing gravity, the separation of materials with different particle diameters is realized, the environmental pollution and the injury to workers caused by the overflow of lime powder during sieving are effectively prevented, the filter screen can be automatically cleaned, and the production efficiency is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

The technical solution of the present invention is specifically described below with reference to the following embodiments and accompanying drawings.

Example 1

The lime screening machine shown in fig. 1 comprises a communication pipeline 1, a circular screening shell 2, a feeding hole 3, a filter screen 4, a rotating shaft 5, fan blades 6, a material cavity 7, a material outlet 8, a stretching device 9, a suction cup 10, a negative pressure pipeline 11, a negative pressure pump 12, a dust removal cloth bag 13, supporting legs 14, a discharging hole 15 and a sleeve ring convex 16.

The circular screening shells 2 are sequentially arranged from top to bottom, the circular screening shells 2 are communicated through a communication pipeline 1, a feeding hole 3 is formed at the topmost part, and a discharging hole 15 is formed at the bottommost part; the bottom of the circular screening shell is provided with a filter screen 4, and the apertures of the filter screens 4 become smaller from top to bottom; a rotating shaft 5 is installed at the center of a circle of the circular screening shell, a plurality of fan blades 6 are fixed on the rotating shaft 5 along the circumferential direction, and a material cavity 7 is formed between every two adjacent fan blades; a material outlet 8 is formed at the lower part of the side surface of the circular screening shell 2; two ends of the filter screen 4 extend out of the circular screening shell 2 and are connected with a stretching device 9; suction cups 10 are respectively arranged above the two ends of the filter screen 4, and the suction cups 10 are communicated with a negative pressure pump 12 through a negative pressure pipeline 11; the rotating shaft 5 is connected with a motor.

The end part of the negative pressure pipeline 11 is provided with a dust removal cloth bag 13. The induction device 9 is a magnetic inductor, gears are mounted on the rotating shafts 5 and are in power connection through chains, and one rotating shaft 5 is connected with a motor.

The stretching device 9 is a cylinder. The bottom of the bottommost circular screening housing 2 is fitted with legs 14.

A sleeve ring convex 16 is protruded at the outer end of the material outlet 8.

The using method of the invention is as follows:

lime gets into circular screening casing 2 from feed inlet 3, and flabellum 6 is rotatory under pivot 5 drives to constantly drive lime through the filter screen 4 of bottom, make lime sieve down, and the lime that is greater than the filter screen aperture when through material outlet 8, get into material outlet 8 and flow out, get into the collection bag that 16 covers of cover belt wheel protruding department were established, thereby realize material separation. Not crossing predetermined time, stretching out of filter screen one side draws device 9 flexible, and the opposite side is tensile for the filter screen slides, and when sucking disc 10, the particle of jam in its space is by the suction, then crosses one section and stretches out and draw device 9 reverse flexible, makes the filter screen after the clearance return the normal position, thereby realizes the timely clearance of filter screen, and can not break screening process influence screening efficiency. Finally, the finest material flows out of the discharge port 15 and is collected in a material bag.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the specification and the embodiments, which are fully applicable to various fields of endeavor for which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. The lime screening machine is characterized by comprising a plurality of circular screening shells (2) which are sequentially communicated through a communication pipeline (1) from top to bottom, wherein a feeding hole (3) is formed at the top of the topmost circular screening shell (2), and a discharging hole (15) is formed at the bottom of the bottommost circular screening shell (2); the bottom of the circular screening shell (2) is provided with filter screens (4), and the apertures of the filter screens (4) become smaller from top to bottom; a rotating shaft (5) is installed at the circle center of the circular screening shell, a plurality of fan blades (6) are fixed on the rotating shaft (5) along the circumferential direction, and a material cavity (7) is formed between every two adjacent fan blades; a material outlet (8) is formed in the lower part of the side surface of the circular screening shell (2); two ends of the filter screen (4) extend out of the circular screening shell (2) and are connected with a stretching device (9); suction cups (10) are respectively arranged above two ends of the filter screen (4), and the suction cups (10) are communicated with a negative pressure pump (12) through a negative pressure pipeline (11); the rotating shaft (5) is connected with a motor;

lime enters the circular screening shell (2) from the feeding hole (3), the fan blades (6) are driven by the rotating shaft (5) to rotate, so that the lime is continuously driven to pass through the bottom filter screen (4), the lime is screened, and when the lime with the aperture larger than that of the filter screen passes through the material outlet (8), the lime enters the material outlet (8) to flow out and enters the collecting bag sleeved at the annular bulge (16) of the sleeve, so that material separation is realized; every preset time, the stretching device (9) on one side of the filter screen stretches, the other side stretches, so that the filter screen slides, when the filter screen passes through the sucker (10), particles blocked in gaps of the filter screen are sucked out, and then the stretching device (9) stretches reversely after a period of time, so that the cleaned filter screen returns to the original position, the filter screen is cleaned in time, and the screening efficiency cannot be influenced by interrupting the screening process; finally, the finest material flows out of the discharge port (15) and is collected in a material bag.

2. The lime screening machine according to claim 1, characterized in that a dust removal cloth bag (13) is mounted at the end of the negative pressure pipeline (11).

3. The lime screening machine according to claim 1, characterized in that gears are mounted on the shafts (5) and are connected by chain power, and one of the shafts (5) is connected with a motor.

4. Lime screen according to claim 1, characterized in that the stretching device (9) is a cylinder.

5. Lime screen machine according to claim 4, characterized in that the bottom of the bottommost circular screen housing (2) is fitted with legs (14).

6. Lime screen according to claim 1, characterized in that the material outlet (8) is provided with a collar (16) protruding from its outer end.