CN112691884A - Screening machine and screening method - Google Patents

Abstract

The utility model provides a screening machine, includes many parallel arrangement's pivot, and every pivot is equipped with a plurality of carousels, and the clearance between the epaxial carousel of adjacent commentaries on classics constitutes the clearance of sieving, is equipped with the material and pours the mouth and drive the material and pour the mouth and take place relative displacement's moving mechanism with the pivot in the pivot top. The invention also provides a screening method, which is characterized in that the distance between the material pouring opening of the screening machine and the last rotating shaft is adjusted, so that the materials reaching the last rotating shaft still have smaller particles and the materials which can pass through the screening gap still do not pass through the screening gap, and the materials with larger particles still float on the materials with smaller particles in the materials on the last rotating shaft. The invention has the advantages that the rotating disc does not need to be replaced or delayed to be replaced under the condition that the abrasion of the sieving gap is increased, thereby reducing the operation cost of equipment, shortening the downtime and improving the production efficiency.

Description

Screening machine and screening method

Technical Field

The invention relates to a screening device and a screening method, in particular to a screening machine and a screening method for screening ceramic raw materials.

Background

In the existing screening equipment, a screening machine mainly comprises a plurality of rotating shafts which are arranged in parallel, each rotating shaft is provided with a plurality of rotating discs which are arranged at intervals, the rotating discs on every two adjacent rotating shafts are inserted into the rotating disc intervals on the rotating shafts of the other rotating shaft, a clearance between every two adjacent rotating discs forms a screening clearance for screening materials, and all the rotating discs rotate in the same direction under the driving of the rotating shafts.

The working principle of the sieving machine is that materials falling above the rotating shafts flow along the arrangement direction of the rotating shafts by utilizing the rotation of the rotating discs in the same direction, the materials pass through the rotating shafts, in the flowing process of the materials, the materials with smaller particles can fall below the rotating shafts through the sieving gaps between the rotating discs, the materials with larger particles cannot pass through the sieving gaps and are thrown out from the top of the last rotating shaft along with the flowing of the materials, and therefore the materials are sieved to be sieved materials below the rotating shafts and sieved materials thrown out from the top of the last rotating shaft.

However, the clearance of sieving between the carousel can increase because of the wearing and tearing of carousel for originally can not also drop the pivot below through the great granule in clearance of sieving, the result has reduced the screening quality. Therefore, the conventional screening machine needs to replace the rotary disc frequently, so that the operation cost of the equipment is increased, and the production efficiency is reduced due to the shutdown of the equipment.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the sieving machine which can reduce the operation cost of equipment and improve the production efficiency. The invention also provides a screening method to solve the same problem.

The screening machine is realized as follows: the screening machine includes many parallel arrangement's pivot, a plurality of interval arrangement's carousel is installed along the axial to every pivot, every two adjacent epaxial carousel of commentaries on classics insert each other in the epaxial carousel interval of other side, the clearance between every two carousel that are close to constitutes the clearance of sieving of screening material, be equipped with the material and pour out the mouth above the pivot, thereby the carousel equidirectional rotation makes the material that falls to the pivot flow along the direction that the pivot was arranged, be equipped with the moving mechanism that the drive material pours out the mouth and the pivot takes place relative displacement, the distance between material pouring out the mouth and the last pivot changes along with this relative displacement, last pivot means the last pivot that the material can reach along the direction flow that the pivot was arranged.

As an alternative embodiment, in the path of the material flow along the direction of the alignment of the axes of rotation, the screening gap between the rotating discs close to the material pouring opening is smaller than the maximum particle size of the screened material to be obtained.

As an alternative embodiment, a spacer is arranged between every two adjacent rotating discs on the same rotating shaft, and the spacer is sleeved on the rotating shaft.

In another aspect, the screening method of the present invention is implemented by: by using the sieving machine provided by the invention, the materials to be sieved are poured onto the rotating shaft from the material pouring opening, the materials with smaller particles fall below the rotating shaft through the sieving gap, the materials flow on the rotating shaft along the arrangement direction of the rotating shaft by utilizing the rotation of the rotating disc in the same direction, the phenomenon that the materials with larger particles roll and float to the upper side of the materials with smaller particles in the flowing process of the materials on the rotating shaft is utilized, and the distance between the material pouring opening and the last rotating shaft is adjusted, so that when the materials flowing on the rotating shaft reach the last rotating shaft, the materials with smaller particles still pass through the sieving gap, and the materials with larger particles still float on the materials with smaller particles in the last rotating shaft.

The sieving machine has the advantages that the distance between the material pouring opening and the last rotating shaft is adjustable, so that when the material flows to the last rotating shaft, the material with larger particles still floats on the material with smaller particles by adjusting the distance, even if the sieving gap is increased due to abrasion of the rotating disc, the material with larger particles cannot pass through the increased sieving gap due to obstruction of the material with smaller particles below, and thus, the sieving machine can still avoid replacing or delay replacing the rotating disc under the condition that the abrasion of the sieving gap is increased, or at least delay replacing the rotating discs on the rotating shafts close to the last rotating shaft, so that the operation cost of the equipment is reduced, the downtime is reduced, and the production efficiency is improved.

Drawings

Figure 1 is a schematic structural view of an embodiment of the screening machine of the present invention;

figure 2 is a schematic view of two of the shafts and the disks thereon from the top of figure 1, i.e., from the top of the screening machine;

figure 3 is a schematic view of the operating condition of the screening machine before wear of the screening gap increases;

figure 4 is a schematic view of the operating condition of the screening machine after the distance between the material pouring opening and the last rotating shaft is shortened.

Detailed Description

To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, unless the context clearly dictates otherwise.

It should be noted that when an element is referred to as being "secured" to another element, it may or may not be secured in a removable connection, unless specifically stated otherwise herein.

The screening machine according to the present invention, as shown in fig. 1, comprises a plurality of rotating shafts 1 arranged in parallel, each rotating shaft being provided with a plurality of rotating discs 2 arranged at intervals in an axial direction. All the turntables 2 are driven by the rotating shaft 1 to rotate in the same direction. In the example of fig. 1 all the turntables 2 are rotated counter-clockwise. A material pouring opening 3 is arranged above the rotating shaft 1. The material to be screened is poured onto the rotating shaft 1 from the material pouring opening 3.

As shown in fig. 2, the rotating discs 2 on every two adjacent rotating shafts 1 are inserted into the rotating disc space on the other rotating shaft, and the gap between every two adjacent rotating discs 2 forms a sieving gap for sieving materials.

The sieving machine is also provided with a moving mechanism for driving the material pouring opening 3 and the rotating shaft 1 to generate relative displacement. The embodiment shown in fig. 1 employs an endless belt 4 driven to reciprocate by a motor as the moving mechanism. The material pouring port 3 is driven by the endless belt 4 to move in the left-right direction of fig. 1, thereby changing the distance between the material pouring port 3 and the last rotating shaft 1 a. The last rotating shaft 1a is the last rotating shaft which can be reached by the materials flowing along the direction of the arrangement of the rotating shafts.

The moving mechanism is not limited to a reciprocating circulating belt, and for example, an air cylinder or hydraulic cylinder driving mechanism can be adopted, the air cylinder or hydraulic cylinder drives the material pouring opening 3 to move in a reciprocating manner, or a linear motor or a gear rack mechanism can be adopted to drive the material pouring opening 3 to move in a reciprocating manner.

It should be noted that, the material pouring opening 3 and the rotating shaft 1 may be relatively displaced in a structural manner that the material pouring opening 3 is fixed and all the rotating shafts 1 move together, or the material pouring opening 3 and all the rotating shafts 1 move together relatively. For example, all the rotating shafts 1 are mounted on the same moving support, and the moving support is driven by the moving mechanism to move back and forth, so that the distance between the material pouring opening 3 and the last rotating shaft 1a is changed.

The screening method adopts the screening machine provided by the invention. Specifically, as shown in fig. 3, the material to be screened is poured onto the rotating shaft 1 from the material pouring opening 3, and the materials flow along the direction of the arrangement of the rotating shaft immediately after being poured onto the rotating shaft 1 due to the same-direction rotation of all the rotating discs 2. When the materials flow, the materials with smaller particles fall below the rotating shaft 1 through the sieving gap between the rotating discs under the action of gravity to form sieving materials.

Before the discs 2 wear, as shown in fig. 3, the larger particles of material are thrown with the flow of material from above the last shaft 1a because they cannot pass through the screening gap between the discs. The material with larger particles which is thrown out is separated from the sieve material which falls under the rotating shaft.

After carousel 2 wearing and tearing lead to the clearance increase of sieving, the great material of granule will drop to the pivot below through the clearance of sieving. In order to avoid the situation, the method of the invention utilizes the phenomenon that the materials with larger particles roll and float to the upper side of the materials with smaller particles as shown in fig. 3 in the process that the materials flow on the rotating shafts, adjusts the distance between the material pouring opening 3 and the last rotating shaft 1a, and shortens the distance between the material pouring opening 3 and the last rotating shaft 1a as shown in fig. 4, so that when the materials on the rotating shafts 1 flow to the last rotating shaft 1a, the materials with smaller particles and capable of passing through the sieving gap can not pass through the sieving gap yet, and the materials reaching the upper side of the last rotating shaft 1a still have the materials with larger particles floating on the materials with smaller particles. In this way, even if the screening gap has become worn and enlarged, the material with larger particles cannot pass through the screening gap because it is blocked by the material with smaller particles below, and can only be thrown out together with a small amount of material with smaller particles from above the last rotating shaft 1 a.

It should be noted that the timing of adjusting the distance between the material pouring opening 3 and the last rotating shaft 1a may be the adjustment after the sieving machine has been operated for a certain period of time, or the adjustment may be made when the sieving machine has just started to operate and the turntable has not been worn, so that the material reaching the last rotating shaft can be ensured to have larger particles floating on smaller particles all the time in the whole process of the sieving machine operation.

Because the material can only take place the phenomenon that the great material of granule rolls the come-up to the less material top of granule at the in-process that flows, consequently, be close to material pouring opening 3's several epaxial carousel of changeing still need in time change after taking place wearing and tearing, because large granule material has not come up in time through these several pivot yet.

In order to solve the problem, the invention further improves the sieving machine. In the path of the flow of the material in the direction in which the rotational axes are arranged, the sieving gap between the rotating discs in the front part of the path near the material pouring opening 3 is set to be smaller than the maximum particle size of the sieved material to be obtained. For example, assuming that material having a maximum particle size of no more than 0.5mm needs to be screened from a batch of material, then 0.5mm is the maximum particle size of the screened material that needs to be obtained, in which case the screening gap between the discs in the rear portion of the material flow path of the screening machine is set to 0.5mm as usual, and the screening gap between the discs in the front portion of the path near the material discharge opening 3 is set to less than 0.5mm, for example to 0.3mm, so that the renewal cycle of the discs in the front portion of the path can be extended, and the discs do not need to be replaced immediately even if the discs are worn, reducing the frequency of renewing the discs.

There is no strict restriction as to how much smaller the screening gap between the discs should be than the maximum particle size of the screened material that needs to be obtained. The larger this difference, the longer the update period of the turntable, and the less frequent the update.

The specific number of the rotating shafts is required to set the sieving gap between the rotating discs to be smaller than the maximum particle size of the sieved material to be obtained, and the sieving gap is determined according to the material flow in actual production. The best design is that the sieving gap between the rotating discs of the rotating shafts is smaller than the maximum particle size of the sieved material to be obtained as long as the large-particle materials are not floated in time when passing through the rotating shafts. Taking fig. 4 as an example, the sieving gap between the rotating discs of the right three rotating shafts should be set to be smaller than the maximum particle size of the sieved material to be obtained, because large-particle materials are not floated in time when passing through the three rotating shafts.

In order to facilitate adjustment of the sieving gap between the rotating discs, as shown in fig. 2, a spacer 5 is arranged between every two adjacent rotating discs 2 on each rotating shaft 1, and the spacer 5 is sleeved on the rotating shaft 1. The spacing between the turntables 2, i.e. the screening gap between the turntables, can be adjusted by replacing spacers 5 of different lengths.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. The protection scope of the present invention should be subject to the appended claims.

Claims (4)

1. The utility model provides a screening machine, includes many parallel arrangement's pivot, and a plurality of interval arrangements's carousel is installed along the axial to every pivot, and every two adjacent epaxial carousels insert each other in the epaxial carousel interval of other side, and the clearance between per two turntables that are close to constitutes the clearance of sieving of screening material, is equipped with the material mouth of pouring in the pivot top, thereby the carousel equidirectional rotation makes to fall to the epaxial material of commentaries on classics and flows characterized by along the direction that the pivot was arranged: the material pouring device is provided with a moving mechanism for driving the material pouring opening and the rotating shaft to generate relative displacement, the distance between the material pouring opening and the last rotating shaft changes along with the relative displacement, and the last rotating shaft refers to the last rotating shaft which can be reached by the material flowing along the direction of the arrangement of the rotating shafts.

2. A screening machine according to claim 1 characterised in that: in the path of the material flowing along the direction of the arrangement of the rotating shafts, the sieving gap between the rotating discs close to the material pouring opening is smaller than the maximum particle size of the sieved material to be obtained.

3. A screening machine according to claim 1 characterised in that: and a spacer bush is arranged between every two adjacent turntables on the same rotating shaft and sleeved on the rotating shaft.

4. A screening method is characterized in that: the sieving machine according to claim 1, wherein the material to be sieved is poured onto the rotating shaft from the material pouring opening, the material with smaller particles falls below the rotating shaft through the sieving gap, the material flows along the rotating shaft in the same direction by the rotation of the rotating disc, the material with larger particles rolls and floats above the material with smaller particles in the process of flowing on the rotating shaft, and the distance between the material pouring opening and the last rotating shaft is adjusted, so that when the material flowing on the rotating shaft reaches the last rotating shaft, the material with smaller particles which can pass through the sieving gap can not pass through the sieving gap, and the material with larger particles can still float on the material with smaller particles in the material on the last rotating shaft.

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