CN220697075U

CN220697075U - Hydraulic grading device for fine-fraction materials

Info

Publication number: CN220697075U
Application number: CN202322121748.4U
Authority: CN
Inventors: 高志国
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-04-02
Anticipated expiration: 2033-08-08

Abstract

The utility model discloses a hydraulic classification device for fine-fraction materials, which comprises a main cylinder body, a feeding pipe, a distributing cylinder, a bulk material plate, a collecting ring, a material guide plate, an overflow groove, a cone, a composite screen, a touch screen and a densimeter, wherein the main cylinder body is provided with a plurality of material guide grooves; the cone is welded on the horizontal bottom plate of the main cylinder; the upper end opening of the cone is a large end, and the large end is positioned in the cylinder; the lower port of the cone is connected with a coarse-grain product discharging pipe through an interface flange, and an electric regulating valve is arranged in the coarse-grain product discharging pipe; the inner wall of the main cylinder body is provided with a screen seat board, the bottom end of the composite screen is fixed with the large end of the cone through a small pressing strip, and the top end of the composite screen is fixed with the screen seat board through a large pressing strip. The device has the advantages that the quality efficiency and the quantity efficiency of classification are higher than those of the existing classification equipment, no vulnerable part exists, the operation is stable and reliable, the matched ore sand pump has small power and obvious energy-saving effect, intelligent digital touch screen management is realized, and the classification precision is high.

Description

Hydraulic grading device for fine-fraction materials

Technical Field

The utility model relates to the field of material classification devices, in particular to a hydraulic classification device for fine-grained materials in the field of mineral separation engineering and building material sand production, which is particularly suitable for hydraulic classification operation of finer-grained materials in mineral separation engineering.

Background

Currently, the known material classifying equipment in mineral separation engineering mainly comprises a spiral classifier, a hydrocyclone and various vibrating sieves.

The spiral classifier is a rectangular chute with a bottom inclination angle of 12-18.5 degrees and a semicircular bottom. One or two longitudinal shafts are mounted in the groove, and spiral blades are arranged continuously along the shaft length. The screw shaft is driven to rotate by the upper end transmission mechanism. For example, a double helix, which rotates outwardly from the top. The slurry is fed from the side of the tank. A sedimentation classifying surface is formed at the lower part of the tank. Coarse particles settle to the bottom of the tank and are then discharged upwards by being pushed by the screw, and are dewatered during transport. The fine particles which are not settled are carried by the surface pulp flow and discharged through the overflow weir.

Hydrocyclones are devices that use a rotating stream for classification and are also used for concentration and dewatering for classification. Mainly comprises a hollow cylinder and a cone which are connected. An overflow pipe is inserted in the center of the cylinder, a feeding pipe is connected along the tangential direction, and a sand settling opening is reserved at the lower part of the cone. Under the action of pressure, the ore pulp is fed into cyclone along ore feeding pipe and then makes rotary motion under the restriction of cylindrical wall. Coarse particles are thrown to the wall due to large inertial centrifugal force, gradually flow downwards and are discharged from the bottom to form settled sand. The fine particles move to the wall at a small speed, and the liquid flowing towards the center is driven by the liquid to be discharged from the central overflow pipe to become overflow.

Various vibrating screens are devices that utilize screens to vibrate the screens with various vibrating devices to achieve classification of the material and are also used for concentration or dewatering. Mainly comprises a distributing device, a frame, a screen, a vibrating device, a coarse-grain ore pulp tank and a fine-grain ore pulp tank. The ore pulp is evenly fed into the upper part of the inclined screen by the distributor and moves towards the lower end along the inclined screen under the action of gravity and the vibration force of the vibration device. The screen is vibrated by the vibrating device to accelerate the speed of fine particles penetrating the screen, so that the separation process of materials is accelerated. Particles which cannot pass through the screen mesh enter the coarse particle pulp tank, and particles which pass through the screen mesh enter the fine particle pulp tank.

Spiral classifiers belong to the first generation of classifying equipment. The main advantages are stable and reliable operation of the equipment, and the main disadvantages are low grading efficiency and poor grading precision.

Both the cyclone and the vibrating screen belong to the second generation classification equipment. The main advantages are high classification efficiency, and classification accuracy is superior to that of a spiral classifier; the main disadvantages are that wearing out of wearing parts is quick, running stability is poor, and the cyclone sand feeding pump has large power and high energy consumption.

In summary, the existing classification equipment has the defects of poor running stability, low classification efficiency and quick abrasion of easy-to-damage parts.

Disclosure of Invention

In view of the above-mentioned technical shortcomings, it is an object of the present utility model to provide a novel classifying device different from the existing spiral classifier, hydrocyclone and various vibrating screens. The device has the advantages that the quality efficiency and the quantity efficiency of classification are higher than those of the existing classification equipment, no vulnerable part exists, the operation is stable and reliable, the matched ore sand pump has small power and obvious energy-saving effect, intelligent digital touch screen management is realized, and the classification precision is high.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a hydraulic classification device for fine-fraction materials, which is characterized by comprising a main cylinder body, a feeding pipe, a distributing cylinder, a bulk cargo plate, a ore collecting ring, a material guiding plate, an overflow groove, a cone, a composite screen, a touch screen and a densimeter;

the cone is welded on the horizontal bottom plate of the main cylinder; the upper end opening of the cone is a large end, and the large end is positioned in the cylinder; the lower port of the cone is connected with a coarse-grain product discharging pipe through an interface flange, and an electric regulating valve is arranged in the coarse-grain product discharging pipe;

the inner wall of the main cylinder body is provided with a screen seat plate, the bottom end of the composite screen is fixed with the large end of the cone through a small pressing strip, and the top end of the composite screen is fixed with the screen seat plate through a large pressing strip; the main cylinder body is provided with a water distribution pipe which is positioned below the composite screen; a sewage pipe is arranged on the horizontal bottom plate of the main cylinder body, and a drain valve is arranged in the sewage pipe;

the overflow groove is arranged on the outer side wall of the main cylinder body, and an overflow port is arranged at the lower position of the overflow groove;

the material distribution cylinder is arranged in the main cylinder body and is positioned above the cone; the bottom end of the feeding pipe is inserted into the center of the distributing cylinder, and the densimeter is inserted into the distributing cylinder; the ore collecting ring is positioned outside the distributing cylinder and is fixedly connected with the main cylinder body through the supporting frame; the bulk cargo plate is arranged on the outer wall of the material distribution cylinder, and the section of the bulk cargo plate is gradually inclined from top to bottom in the direction away from the material distribution cylinder; an ore pulp outlet is formed between the bottom end of the ore gathering ring and the outer side wall of the bulk cargo plate;

the bottom end of the material guide plate is connected with the bottom end of the bulk material plate, the section of the material guide plate is of an inverted cone structure, and the bottom end of the material guide plate extends into the cone;

the electric valve is arranged on a pipeline before the water distribution pipe enters the main cylinder body, the electric regulating valve and the electric valve are connected with the touch screen through a signal wire and a power wire, and the densimeter is connected with the touch screen through the signal wire.

Further, the cloth cylinder is formed by welding a cloth cylinder vertical edge plate and a cloth cylinder bottom plate, and a circular pressure cloth hole and a trapezoid overflow cloth opening are formed in the cloth cylinder vertical edge plate.

The utility model has the beneficial effects that:

1. the grading principle is advanced;

the working principle of the device for realizing material classification is completely different from that of the existing spiral classifier, hydrocyclone and various vibrating sieves. The core principle of realizing material classification of the utility model is as follows: under the action of ascending power water flowing in laminar flow, the equal-falling particles of a certain level of the material to be classified can be accurately and controllably classified by adjusting the flow speed of the power water by utilizing the characteristic that the sedimentation speed of the equal-falling particles is the same in the last state. The grading principle is completely different from the existing grading device, and has a certain grading function.

2. The grading quantity efficiency and quality efficiency indexes are good;

the quantitative efficiency and quality efficiency index of the classification are obviously higher than those of the currently known spiral classifier, hydrocyclone and various vibration sieves through the data evaluation analysis of the classification products of the test run of the device.

3. The large-scale intelligent level is high, and the operation is stable and reliable;

the device has no moving parts and vulnerable parts, the ore pulp is fed in a self-flowing state, and the running power of the ore sand pump is low, so that the energy-saving effect is obvious; the device is easy to enlarge, occupies small area, is stable and reliable in complete intelligent digital control operation, and can realize remote network control.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a longitudinal sectional view of a hydraulic classification apparatus for fine fraction materials according to an embodiment of the present utility model;

FIG. 2 is a longitudinal sectional view of a distribution cylinder of a hydraulic classification device for fine fraction materials according to an embodiment of the present utility model;

FIG. 3 is a top view of a hydraulic classifier cloth cartridge for fine fraction materials provided in accordance with an embodiment of the present utility model;

fig. 4 is a schematic diagram of the hydraulic classification device for fine fraction materials according to an embodiment of the present utility model.

Reference numerals illustrate:

the device comprises a feeding pipe 1, a distributing cylinder 2, a bulk material plate 3, a collecting ring 4, a main cylinder 5, a material guide plate 6, an overflow groove 7, a screen seat plate 8, a water distribution pipe 9, a blow-down valve 10, an interface flange 11, an electric regulating valve 12, a cone 13, a small pressing strip 14, a composite screen 15, an overflow port 16, a large pressing strip 17, a touch screen 18, a supporting frame 19, an electric valve 20, a densimeter 21, a trapezoid overflow distributing port 22, a distributing cylinder vertical edge plate 23, a circular pressure distributing hole 24 and a distributing cylinder bottom plate 25.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A hydraulic classification device for fine-fraction materials comprises a main cylinder body 5, a feeding pipe 1, a distributing cylinder 2, a bulk material plate 3, a collecting ring 4, a material guide plate 6, an overflow groove 7, a cone 13, a composite screen 15, a touch screen 18 and a densimeter 21;

in fig. 1, a feeding pipe 01 is inserted into the center of a distributing cylinder 02; the material distributing cylinder 02, the bulk cargo plate 03, the ore gathering ring 04 and the material guiding plate 06 are welded together and are arranged on the main cylinder body 05 through the supporting frame 19 and the overflow groove 07; the cone 13 is welded on the horizontal bottom plate of the main cylinder 05; the composite screen 15 is fixed by a small pressing strip 14, a screen seat board 08 and a large pressing strip 17; the electric valve 20 is installed before the water distribution pipe 09 enters the main cylinder 05, the electric regulating valve 12 and the electric valve 20 are connected with the touch screen 18 through a signal line and a power line, the densimeter 21 is connected with the touch screen through a signal line, and the touch screen 18 is independently installed in a place near the hydraulic screen.

In fig. 2-3, the cloth cartridge 02 is formed by welding its rim plate 002 and bottom plate 004. A circular pressure distributing hole 003 and a trapezoid overflow distributing hole 001 are arranged on the vertical edge plate 002.

Working principle:

as shown in fig. 4, the electric valve 20 on the water distribution pipe 9 is firstly opened to gradually enable the power water to reach a preset flow value; secondly, an external ore feeding ore pulp valve is opened, raw ore pulp is fed into the center of the distributing cylinder 2 through the ore feeding pipe 1, and then the ore pulp is evenly and circularly fed onto the bulk material plate 3 or the ore collecting ring 4 in a circular pressure distributing hole 24 or a trapezoid overflow distributing hole 22 or even in a top full overflow mode, and finally enters into a rough classification working chamber (a space area formed by the material guiding plate 6 and the compound screen 15) along the direction C.

The classification is realized under the combined action of the lifting force of dynamic water flowing upwards in laminar flow, the pulp buoyancy, the gravity of the particles, the pulp flow disturbance force and the guide plate 6 of a certain level of equal-falling particles and the coarse particles which are obviously larger than the equal-falling particles in the pulp entering the rough classification working chamber, and the coarse particles quickly enter the cone 13 to be settled sand and are discharged through the electric regulating valve 12; fine particles and a small portion of coarse particles mixed therein pass through and drive the new feed slurry stream on the bulk head 3 into the fine classification chamber (the space region formed by the outer wall of the collection ring and the inner wall of the main cylinder). In the precise classification working chamber, coarse grains with the grain diameter not significantly larger than a certain grade of equal-falling grains slowly subside and enter the rough classification working chamber again to become sand setting; and the particles with the particle size smaller than a certain grade of equal-falling particles enter the overflow groove 7 to become overflow and are discharged through the overflow port 16.

The pulp density signal value detected by the densimeter 21 is transmitted to the touch screen 18, and is respectively fed back to the electric regulating valve 12 and the electric valve 20 after being processed by a program; the electric regulating valve 12 controls the pulp concentration of coarse-grain sand setting by adjusting the opening of the valve, and the electric valve 20 controls the feeding amount of power water by adjusting the opening of the valve so as to adapt to the change of the raw pulp concentration and achieve the optimal classification effect.

Under the normal running state, raw ore pulp is fed into a distributing cylinder 2 along a direction 1 through a feeding pipe 1, and is uniformly fed onto a bulk cargo plate 3 along a direction C through the distributing cylinder 2; the power water controlled by the electric valve 20 passes through the water distribution pipe 09 and then passes through the composite screen 15 to form laminar water flow flowing along the direction D; when the ore pulp flow flowing uniformly along the direction C contacts with laminar water flow flowing along the direction D, particles with different particle sizes and different densities in the ore pulp enter the overflow groove 7 along the direction B to form fine-level particles under the comprehensive actions of dynamic water flow lifting force, self gravity, ore pulp buoyancy and pulp flow disturbing force flowing along the direction D, and are discharged along the direction G through the overflow port 16 and enter the next procedure; the equal-falling particles larger than the grade enter the cone 13 along the direction E, and the ore pulp forming coarse grade particles with certain concentration is discharged along the direction F and enters the next working procedure under the control of the electric regulating valve 12. Thus, the classification process of the equal-reduction particles of a certain level in the raw ore pulp is realized.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The hydraulic classification device for the fine-fraction materials is characterized by comprising a main cylinder body, a feeding pipe, a distributing cylinder, a bulk material plate, a collecting ring, a material guide plate, an overflow groove, a cone, a composite screen, a touch screen and a densimeter;

2. The hydraulic classification device for fine-fraction materials according to claim 1, wherein the distributing cylinder is formed by welding a distributing cylinder vertical edge plate and a distributing cylinder bottom plate, and the distributing cylinder vertical edge plate is provided with a circular pressure distributing hole and a trapezoid overflow distributing opening.