CN115338120B

CN115338120B - Basalt fiber screening device and screening system

Info

Publication number: CN115338120B
Application number: CN202211278665.XA
Authority: CN
Inventors: 曾树义; 夏鼎国; 李红梅; 邓雅心; 李媛; 张涵
Original assignee: Sichuan Aerospace Tuoda Basalt Fiber Development Co ltd
Current assignee: Sichuan Aerospace Tuoda Basalt Fiber Development Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-02-21
Anticipated expiration: 2042-10-19
Also published as: CN115338120A

Abstract

The invention provides a basalt fiber screening device and a basalt fiber screening system, and relates to the technical field of screening equipment. Basalt fiber screening plant includes the box, box top and bottom are equipped with inlet pipe and discharging pipe respectively, be equipped with the silo in the box, be equipped with the filter screen between silo top edge and the box top, the filter screen surrounds the inboard region of silo, be equipped with the fagging in the inboard box of silo, it is equipped with the carousel to rotate on the fagging, be equipped with a plurality of stock guides on the carousel, the device still includes the air classifier, the raw materials entry and the silo bottom pipeline intercommunication of air classifier, the fine material export and the inlet pipe of air classifier pass through the pipeline intercommunication, there is the clearance between silo top and fagging and the box lateral wall. The basalt fiber screening system comprises a plurality of basalt fiber screening devices, the basalt fiber screening devices are sequentially arranged, and the feeding pipes of the two adjacent basalt fiber screening devices are communicated with the discharging pipe.

Description

Basalt fiber screening device and screening system

Technical Field

The invention relates to the technical field of screening equipment, in particular to a basalt fiber screening device and a basalt fiber screening system.

Background

The basalt fiber is a continuous fiber which is formed by melting basalt stone at 1450-1500 ℃ and drawing the basalt stone at a high speed through a platinum-rhodium alloy wire drawing bushing plate. The basalt fiber is a novel inorganic environment-friendly green high-performance fiber material, and mainly comprises oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide, titanium dioxide and the like. The basalt continuous fiber has high strength, and also has various excellent performances of electrical insulation, corrosion resistance, high temperature resistance and the like. In addition, the production process of the basalt fiber determines that the produced waste is less, the environmental pollution is less, and the product can be directly degraded in the environment after being discarded without any harm, so the basalt fiber is a real green and environment-friendly material. The basalt continuous fiber has been widely applied in various aspects such as fiber reinforced composite materials, friction materials, shipbuilding materials, heat insulation materials, automobile industry, high-temperature filter fabrics, protection fields and the like.

At present, the production process of the basalt fiber reinforced composite coating comprises the steps of crushing, screening, preparing basalt fiber powder by crushing, and grading the basalt fiber powder by screening to obtain target powder.

In the prior art, screening equipment is generally vibration screening and air current screening, and vibration screening has the problem that powder blocks up the net, screen cloth screening performance descends gradually, and air current screening has the problem that the screening precision is low. Therefore, a technology for improving the sieving efficiency and the sieving accuracy is in demand.

Disclosure of Invention

The invention aims to develop a basalt fiber screening device and a basalt fiber screening system with high screening efficiency and screening precision.

The invention is realized by the following technical scheme:

a basalt fiber screening device comprising:

a box body;

the feeding pipe is arranged at the top of the box body;

the discharge pipe is arranged at the bottom of the box body;

the material groove is arranged in the box body;

the filter screen is arranged between the edge of the top of the trough and the top of the box body and surrounds the area inside the trough;

the supporting plate is arranged in the box body at the inner side of the material groove;

the rotary disc is rotatably arranged on the supporting plate;

the plurality of material guide plates are arranged on the rotary disc;

the device also comprises an air classifier, wherein a raw material inlet of the air classifier is communicated with a pipeline at the bottom of the trough, a fine material outlet of the air classifier is communicated with the feeding pipe through a pipeline, and a gap exists between the top of the trough and the supporting plate as well as between the top of the trough and the side wall of the box body.

Optionally, a plurality of first support rods are arranged between the bottom of the box body and the bottom of the trough, and a plurality of second support rods are arranged between the bottom of the trough and the support plates.

Optionally, the box comprises last box and lower box, it is cylindrical to go up the box, the box is the round platform shape coaxial with last box and the less one side of diameter is in the bottom down, the silo is the round platform shape coaxial with the box, in the lower box was located to the silo, the bottom and the lateral part of silo are parallel with lower box bottom and lateral part respectively.

Optionally, the top of the trough is located at the top of the lower box body, a connecting ring coaxially connected with the trough is arranged at the top of the trough, and the filter screen is annular and coaxially connected with the connecting ring.

Optionally, the fagging is circular and coaxial with the box, fagging top surface and go-between top surface parallel and level, the carousel is connected with the coaxial rotation of fagging, the external diameter of carousel does not exceed the external diameter of fagging.

Optionally, shock insulation rings are arranged between the connecting ring and the top of the material tank and between the top of the filter screen and the top of the box body, and a vibration source is arranged on the connecting ring.

Optionally, the material guide plate is disposed perpendicular to the turntable, the top of the material guide plate is in sliding contact with the top of the upper box body, the material guide plate is arc-shaped, a distance exists between an inner end portion of the material guide plate and a rotating shaft of the turntable, and an outer end portion of the material guide plate extends to an edge of the turntable.

Optionally, the plurality of material guiding plates are arranged in a circular shape at equal intervals around a rotating shaft of the rotating disc, a rotating track of the inner end portions of the plurality of material guiding plates forms a cylindrical feeding cavity, the inner diameter of the feeding pipe does not exceed the diameter of the feeding cavity, and the feeding pipe and the feeding cavity are in a coaxial state.

Optionally, a pressure sensor and an air supply pipe are arranged on the feeding pipe, and the air supply pipe is communicated with the feeding pipe.

The basalt fiber screening system comprises a plurality of basalt fiber screening devices, wherein the basalt fiber screening devices are sequentially arranged, and a feeding pipe and a discharging pipe of each basalt fiber screening device are communicated with each other.

The invention has the beneficial effects that:

the filter screen firstly screens partial materials, and partial small-particle-size materials firstly penetrate through the filter screen, so that the proportion of small-particle-size materials in mixed materials entering the airflow classifier is reduced, the airflow classifier is favorable for separating large-particle-size materials from small-particle-size materials, the small-particle-size materials are continuously circulated until penetrating through the filter screen, the large-particle-size materials are thoroughly separated, and the screening precision is improved; the airflow drives the materials to penetrate through the filter screen, the rotating turntable and the guide plates have a throwing effect on the materials, the screening effect of the materials on the filter screen is improved, the adjacent guide plates on the turntable form a flow channel, the airflow flows to the filter screen through the flow channel, a certain frequency is kept for washing the filter screen, the airflow is cleaned, the filter screen is prevented from being blocked by the materials, the attachment time of the materials on the filter screen is shortened, the filtering efficiency of the filter screen on the materials is improved, and the filter screen keeps the screening performance.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of a screening device;

FIG. 2 isbase:Sub>A view taken along line A-A of FIG. 1;

figure 3 is a diagram of a screening system.

Reference numerals: 1. a box body; 101. an upper box body; 102. a lower box body; 2. a feed pipe; 3. an air supply pipe; 4. a trough; 5. a second stay bar; 6. a first stay bar; 7. a supporting plate; 8. a turntable; 9. a stock guide; 10. a connecting ring; 11. filtering with a screen; 12. a discharge pipe; 13. an air classifier.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings, which are used for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 and 2 show a basalt fiber screening device, which comprises a box body 1, wherein the box body 1 consists of an upper box body 101 and a lower box body 102, the upper box body 101 is cylindrical, the lower box body 102 is in a circular truncated cone shape coaxial with the upper box body 101, and the side of the lower box body 102 with a smaller diameter is positioned at the bottom.

The box body 1 is internally provided with a circular supporting plate 7 which is coaxial with the box body, and the supporting plate 7 is arranged at the bottom of the upper box body 101. The box body 1 is also internally provided with a circular truncated cone-shaped trough 4 which is coaxial with the box body, the trough 4 is arranged in the lower box body 102, and the bottom and the side part of the trough 4 are respectively parallel to the bottom and the side part of the lower box body 102. The top of the trough 4 is of an opening structure, the top of the trough 4 is located at the top of the lower box body 102, the top of the trough 4 is provided with a connecting ring 10 which is coaxially connected with the trough 4, and the top surface of the connecting ring 10 is flush with the top surface of the supporting plate 7.

The connecting ring 10 is provided with a filter screen 11, the filter screen 11 is in a ring shape coaxially connected with the connecting ring 10, and the top end of the filter screen 11 is connected with the top of the upper box 101.

Rubber shock insulation rings are arranged between the connecting ring 10 and the top of the material groove 4 and between the top of the filter screen 11 and the top of the upper box body 101, a vibration source is arranged on the connecting ring 10, and the vibration source is a vibration exciter or a vibrator. The vibration source makes the connecting ring 10 vibrate, and the connecting ring 10 drives the filter screen 11 to vibrate.

A plurality of first support rods 6 are arranged between the bottom of the lower box body 102 and the bottom of the trough 4, a plurality of second support rods 5 are arranged between the bottom of the trough 4 and the support plates 7, and the first support rods 6 and the second support rods 5 are vertically arranged.

The annular gap between the connecting ring 10 and the supporting plate 7 is an inner material opening, and the annular gap between the connecting ring 10 and the side wall of the upper box body 101 is an outer material opening.

The supporting plate 7 is provided with a rotary disc 8 which is coaxially and rotatably connected with the supporting plate, the outer diameter of the rotary disc 8 is the same as that of the supporting plate 7, and the bottom of the supporting plate 7 is provided with a motor which is in transmission connection with the rotary disc 8.

A plurality of material guide plates 9 are arranged on the turntable 8, the material guide plates 9 are perpendicular to the turntable 8, and the tops of the material guide plates 9 are in sliding contact with the top of the upper box 101. The material guide plate 9 is arc-shaped, a certain distance exists between the inner end part of the material guide plate 9 and the axial lead of the turntable 8, and the outer end part of the material guide plate 9 extends to the edge of the turntable 8. The plurality of material guide plates 9 are arranged at equal intervals in the circumferential direction of the turntable 8, and because the inner end parts of the material guide plates 9 have a certain distance with the axial lead of the turntable 8, the rotating tracks of the inner end parts of the plurality of material guide plates 9 form a cylindrical feeding cavity which is coaxial with the turntable 8.

The top of the upper box body 101 is provided with a feeding pipe 2, the feeding pipe 2 and the supporting plate 7 are in a coaxial state, the inner diameter of the feeding pipe 2 is not more than the diameter of the feeding cavity, and materials conveyed by air force enter the feeding cavity from the feeding pipe 2. Still be equipped with pressure sensor and blast pipe 3 on the inlet pipe 2, blast pipe 3 and inlet pipe 2 intercommunication, pressure sensor detects the pressure in the inlet pipe 2, and blast pipe 3 can be to the interior air current of carrying of inlet pipe 2. The bottom of the lower box body 102 is provided with a discharge pipe 12, and the material in the lower box body 102 is output through the discharge pipe 12.

The screening device further comprises an airflow classifier 13, a raw material inlet of the airflow classifier 13 is communicated with a pipeline at the bottom of the material tank 4, a fine material outlet of the airflow classifier 13 is communicated with the feeding pipe 2 through a pipeline, and a coarse material outlet of the airflow classifier 13 outputs coarse materials.

The working process of the screening device is as follows:

the material gets into box 1 by inlet pipe 2, and the material that gets into box 1 is in the feeding cavity on carousel 8, and motor drive carousel 8 rotates, and carousel 8 drives the material and carries out centrifugal motion, and the air current flows to the outside of carousel 8 in the feeding cavity and further drives the material and carry out centrifugal motion. The vibration source on the connecting ring 10 drives the filter screen 11 to vibrate, materials centrifugally move on the rotary table 8 and then pass through the filter screen 11, and materials with small particle sizes penetrate through the filter screen 11, enter the bottom of the lower box body 102 from an outer material opening and are output through the discharge pipe 12; the large-particle-size material and part of the small-particle-size material which does not pass through the filter screen 11 enter the material groove 4 from the inner material opening and enter the airflow classifier 13 from the raw material inlet along with the pipeline. The large-particle-size materials are output from a coarse material outlet of the airflow classifier 13, and the small-particle-size materials enter the feeding pipe 2 from a fine material outlet through a pipeline and return to the box body 1 to be continuously screened. The small-particle-size material refers to the material which can penetrate through the filter screen 11 in the screening device; the large particle size material means a material which cannot pass through the screen 11 in the screening device.

When the pressure in the screening device is small, the effectiveness of the airflow for driving the material to move is weakened, the screening efficiency is influenced, and the scouring effect of the airflow on the filter screen 11 along with the rotating turntable 8 and the material guide plate 9 can also be reduced, so that the time for the material to attach to the filter screen 11 is increased, and the screening efficiency is further reduced. The pressure sensor feeds back the pressure of the feeding pipe 2, when the pressure is lower, airflow is input into the feeding pipe 2 through the air supply pipe 3, the pressure in the feeding pipe 2 is improved, and the pressure in the screening device is prevented from being lower.

Fig. 3 shows a basalt fiber screening system, which includes three screening devices, the three screening devices are sequentially arranged in the vertical direction, from top to bottom, the mesh sizes of the three screening devices 11 are gradually reduced, the diameter of the box body 1 is gradually reduced, and the feeding pipe 2 of the lower screening device is communicated with the discharging pipe 12 of the upper screening device. The material of air conveying gets into the screening system by the inlet pipe 2 of the screening plant of the top, and the material that gets into the screening system passes through three screening plant from top to bottom in proper order, and finally, the coarse fodder export of three screening plant air classifier 13 from top to bottom exports one-level material, second grade material and tertiary material respectively, and the discharging pipe 12 of the screening plant of the bottom exports the level four material, and the particle size of one-level material, second grade material, tertiary material and level four material reduces in proper order.

The filter screen 11 of the invention screens partial materials firstly, and partial small-particle-size materials firstly penetrate through the filter screen 11, so that the proportion of small-particle-size materials in the mixed materials entering the airflow classifier 13 is reduced, the airflow classifier 13 is favorable for separating large-particle-size materials from small-particle-size materials, the small-particle-size materials are continuously circulated until penetrating through the filter screen 11, the complete separation from the large-particle-size materials is realized, and the screening precision is improved. The air current drives the material to see through filter screen 11, and pivoted carousel 8 and stock guide 9 form the effect of shedding to the material, improve the screening effect of material on filter screen 11, adjacent stock guide 9 forms the runner on carousel 8, the air current flows to filter screen 11 through this runner, keep certain frequency to erode filter screen 11, realize that the air current is net-cleaning, when avoiding filter screen 11 to be blocked by the material, reduce the attachment time of material on filter screen 11, improve filter screen 11 and keep the screening performance to the filtration efficiency of material and make filter screen 11.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.

Claims

1. A basalt fiber screening device is characterized by comprising:

a box body;

the feeding pipe is arranged at the top of the box body;

the discharge pipe is arranged at the bottom of the box body;

the material groove is arranged in the box body;

the rotary disc is rotatably arranged on the supporting plate;

the plurality of material guide plates are arranged on the rotary disc;

the device also comprises an air classifier, a raw material inlet of the air classifier is communicated with a pipeline at the bottom of the trough, a fine material outlet of the air classifier is communicated with a feeding pipe through a pipeline, gaps exist between the top of the trough, a supporting plate and the side wall of the box body, the material guide plates are arranged perpendicular to the rotary table, the tops of the material guide plates are in sliding contact with the top of the upper box body, the plurality of material guide plates are arranged in a circular shape at equal intervals around the rotating shaft of the rotary table, the material guide plates are arc-shaped, intervals exist between the inner end parts of the material guide plates and the rotating shaft of the rotary table, a cylindrical feeding cavity is formed by the rotating tracks of the inner end parts of the material guide plates, the inner diameter of the feeding pipe does not exceed the diameter of the feeding cavity, the feeding pipe and the feeding cavity and the feeding pipe and the feeding cavity are in a coaxial state, and the outer end parts of the material guide plates extend to the edge of the rotary table.

2. The basalt fiber screening device according to claim 1, wherein a plurality of first spacers are provided between the bottom of the cabinet and the bottom of the trough, and a plurality of second spacers are provided between the bottom of the trough and the spacers.

3. The basalt fiber screening device according to claim 1, wherein the cabinet is composed of an upper cabinet and a lower cabinet, the upper cabinet is cylindrical, the lower cabinet is in a truncated cone shape coaxial with the upper cabinet and has a smaller diameter side at the bottom, the trough is in a truncated cone shape coaxial with the cabinet, the trough is disposed in the lower cabinet, and the bottom and the side of the trough are parallel to the bottom and the side of the lower cabinet, respectively.

4. The basalt fiber screening device according to claim 3, wherein the top of the trough is located at the top of the lower tank, the top of the trough is provided with a connecting ring coaxially connected with the trough, and the filter screen is annular and coaxially connected with the connecting ring.

5. The basalt fiber screening device according to claim 4, wherein the supporting plate is circular and coaxial with the box body, the top surface of the supporting plate is flush with the top surface of the connecting ring, the rotary disc is connected with the supporting plate in a coaxial and rotating manner, and the outer diameter of the rotary disc does not exceed the outer diameter of the supporting plate.

6. The basalt fiber screening device according to claim 4, wherein shock isolation rings are arranged between the connecting ring and the top of the trough and between the top of the filter screen and the top of the box body, and a vibration source is arranged on the connecting ring.

7. The basalt fiber screening device according to claim 1, wherein the inlet pipe is provided with a pressure sensor and an air supply pipe, and the air supply pipe is communicated with the inlet pipe.

8. A basalt fiber screening system is characterized by comprising a plurality of basalt fiber screening devices according to any one of claims 1 to 7, wherein the plurality of basalt fiber screening devices are sequentially arranged, and feed pipes of two adjacent basalt fiber screening devices are communicated with discharge pipes.