CN113245188A

CN113245188A - Cone probability screen

Info

Publication number: CN113245188A
Application number: CN202110626348.1A
Authority: CN
Inventors: 苗海波
Original assignee: Henan Gongda Machinery Co ltd
Current assignee: Henan Gongda Machinery Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-08-13

Abstract

The invention discloses a conical probability sieve, which comprises a sieve box, a sieve body arranged in the sieve box and a support arranged at the bottom of the sieve box, wherein the sieve body consists of a support cone, a material distributor arranged at the top of the support cone and an annular bar sieve plate sleeved on the support cone, the bottom of the support cone is fixed on the support through a damping spring, the middle part of the lower side of the support cone is provided with a vibrating device, the support is provided with a screen underflow channel cavity and a screen overflow channel cavity, the upper part of the sieve box is provided with a feed inlet opposite to the material distributor, and the bottom of the sieve box is hermetically fixed on the screen overflow channel cavity. Compared with the traditional screening machine, the conical probability screen has larger material distribution width, better screening effect, more tight sealing effect, lighter vibration participating mass, lower power requirement, smaller installation base impact load, simpler screen plate structure and longer service life of the screen plate under the condition of the same floor area.

Description

Cone probability screen

Technical Field

The invention belongs to the technical field of screening equipment, and particularly relates to a conical probability screen.

Background

The vibrating screen mainly comprises a screen box, a vibration exciter, a supporting/hanging device, a motor and the like. The motor drives the main shaft of the vibration exciter to rotate through the belt, and the screen box is vibrated due to the action of centrifugal inertia force of unbalanced weights on the vibration exciter. The eccentric weight of the vibration exciter is changed, and different amplitudes can be obtained. In the practical use process, however, the feeding amount is changed greatly, the particle size of the material is changed greatly, and the conventional bar sieve plate is easy to cause material blocking in the sieving process due to the consistent clearance between the bar sieve plate and the sieve plate. The screen box of the vibrating screen vibrates, thereby increasing the raise dust and being difficult to seal. In addition, the sieve box of the vibrating sieve is heavy, so that not only is higher design strength required, but also higher exciting force and power are required, materials are wasted, impact force on an installation foundation is large, and equipment manufacturing cost, civil engineering cost, operation cost and maintenance cost are increased. In order to improve the vibration screening effect and solve the problems, the existing bar type vibration screen needs to be improved.

Disclosure of Invention

The invention solves the technical problem of providing the conical probability screen which is reasonable in structural design, long in service life and high in screening efficiency.

The invention adopts the following technical scheme for solving the technical problems, and the conical probability sieve is characterized by comprising a sieve box, a sieve body arranged in the sieve box and a support arranged at the bottom of the sieve box, wherein the sieve body consists of a support cone, a material distributor arranged at the top of the support cone and an annular bar sieve plate sleeved on the support cone, the bottom of the support cone is fixed on the support through a damping spring, the middle part of the lower side of the support cone is provided with a vibrating device, the support is provided with a screen underflow channel cavity and a screen overflow channel cavity, the upper part of the sieve box is provided with a feed inlet opposite to the material distributor, and the bottom of the sieve box is hermetically fixed on the screen overflow channel cavity.

Further inject, be equipped with the annular stick sieve of multilayer that the sieve mesh diminishes gradually by last under to on the support cone in proper order, this annular stick sieve includes annular sieve strip mounting base and follows the grating of circumferencial direction equipartition on annular sieve strip mounting base excircle.

Further inject, the last edge circumferencial direction equipartition of annular grating mounting base has the grating spliced eye that a plurality of slopes set up, and the grating is pegged graft and is fixed in the grating spliced eye of annular grating mounting base and the grating sets up to the homonymy slope, and the opening gap between the adjacent grating presents the structure of big end outside small.

Further, the same-direction inclination angle of the screen bars is 0-70 degrees.

Further inject, annular bar sieve is established through annular bar mounting base cover and is installed on supporting the cone, is equipped with the annular that is used for supporting this annular bar sieve on the support cone of annular bar mounting base lower part and supports the boss, and this annular bar sieve sets up on annular supports the boss, supports the location through supporting cone and annular support boss realization to annular bar sieve.

Further inject, be equipped with on the support and extend to near lower floor's annular rod bar sieve bottom and with the unanimous undersize thing passageway chamber in this annular rod bar sieve screening region, support the bottom of cone and be fixed in on the spring mount pad of support through evenly distributed's multiunit damping spring, support the bottom center part of cone and install vibrating device.

Compared with the prior art, the invention has the following beneficial effects: 1. the screening device with the same floor area has more screening area and distribution width when the screening plate is installed. 2. The opening structure with the small inside and the large outside of the screen bar is not easy to clamp materials, has better screen penetration rate and material moving speed on the screen surface, and has better sealing effect. 3. The screen body structure of the invention is light, has no redundant beam structure, and greatly reduces the energy consumption of the screening equipment. 4. The invention has a simpler sieve plate structure, the material passing speed is high, the required vibration energy is small, the impact load on the installation foundation is small, the direct impact between the material and the sieve bars is reduced, and the service life of the sieve bars is obviously prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the construction of the screen body of the present invention;

fig. 5 is a schematic view of the structure of the annular bar screen panel of the present invention.

In the figure: 1-a screen box, 2-a screen body, 3-a support, 4-a damping spring, 5-a vibration device, 6-a screen underflow channel cavity, 7-a screen overflow channel cavity, 8-a support cone, 9-a distributor, 10-an annular bar screen plate, 11-a feed inlet, 12-an annular screen bar mounting base and 13-a screen bar.

Detailed Description

Referring to the drawings for describing the technical scheme of the invention in detail, as shown in fig. 1-3, the conical probability sieve comprises a sieve box 1, a sieve body 2 arranged inside the sieve box 1 and a support 3 arranged at the bottom of the sieve box 1, wherein the sieve body 2 is composed of a support cone 8, a distributor 9 arranged at the top of the support cone 8 and an annular bar sieve plate 10 sleeved on the support cone 8, the bottom of the support cone 8 is fixed on the support 3 through a damping spring 4, a vibrating device 5 is arranged in the middle of the lower side of the support cone 8, a screen underflow channel cavity 6 and a screen overflow channel cavity 7 are arranged on the support 3, a feed inlet 11 opposite to the distributor 9 is arranged at the upper part of the sieve box 1, and the bottom of the sieve box 1 is fixed on the screen overflow channel cavity 7 in a sealing manner.

The multi-layer annular bar screen plate 10 with gradually-reduced screen holes is sequentially arranged on the supporting cone 8 from top to bottom, and the annular bar screen plate 10 comprises an annular screen bar mounting base 12 and screen bars 13 uniformly distributed on the excircle of the annular screen bar mounting base 12 along the circumferential direction.

The annular screen bar mounting base 12 is a rectangular pipe body structure which is obliquely arranged, a plurality of obliquely arranged screen bar inserting holes are uniformly distributed in the circumferential direction on the side plates which are opposite to the rectangular pipe body structure, the screen bars 13 are inserted and fixed in the screen bar inserting holes of the annular screen bar mounting base 12, the screen bars 13 are obliquely arranged towards the same side, and the opening gap between the adjacent screen bars 13 is of a structure with a small inside and a large outside.

The same-direction inclination angle of the screen bars 13 is 0-70 degrees.

The annular bar screen plate 10 is sleeved on the support cone 8 through the annular bar mounting base 12, the support cone 8 at the lower part of the annular bar mounting base 12 is provided with an annular support boss for supporting the annular bar screen plate 10, the annular bar screen plate 10 is arranged on the annular support boss, and the support cone 8 and the annular support boss are used for realizing the support positioning of the annular bar screen plate 10.

The invention is characterized in that a screen underflow passage cavity 6 which extends to the bottom of an adjacent lower annular bar screen plate 10 and is consistent with the screening area of the annular bar screen plate 10 is arranged on a support 3, the bottom of a support cone 8 is fixed on a spring mounting seat of the support 3 through a plurality of groups of damping springs 4 which are uniformly distributed, the number of the damping springs 4 can be selectively and uniformly arranged according to different sizes and specifications of screening equipment, and a vibrating device 5 is arranged at the central part of the bottom of the support cone 8.

The material distributor is positioned at the top of the support cone, and has the function of uniformly distributing materials to be screened onto the annular bar sieve plate, the annular bar sieve plate is placed on the support cone layer by layer, and the vibrating device is arranged at the lower part of the support cone and has the function of promoting the materials to flow and screen on the screen surface of the annular bar sieve plate. The bottom of the supporting cone body is connected with the support through a damping spring, and the damping spring is used for reducing the impact on the support when the screen body vibrates. The support is provided with an oversize material channel cavity and an undersize material channel cavity, and the oversize material channel cavity and the undersize material channel cavity respectively convey oversize materials and undersize materials of the annular bar sieve plate. The screening area of the annular bar screen plate consists of bars, the bars and the horizontal plane form an included angle of 0-70 degrees on the same side, and openings among the bars are in a wedge-shaped structure from inside to outside, so that the arrangement is favorable for material flow and screen penetration on the screen surface of the annular bar screen plate. Because the wedge-shaped openings between the bars on the upper layer and the bars on the lower layer of the annular bar screen plate are gradually reduced, the arrangement enables small granular materials needing to be classified to quickly pass through the annular bar screen plate on the lower layer for screening. A material lining with a certain thickness is formed between each layer of the annular bar sieve plate and the support cone body, and the lining can reduce the wear speed of the support cone body and prolong the service life of the support cone body.

Compared with the traditional screening machine, the conical probability screen has larger material distribution width, better screening effect, more tight sealing effect, lighter vibration participating mass, lower power requirement, smaller installation base impact load, simpler screen plate structure and longer service life of the screen plate under the condition of the same floor area.

While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, the invention further resides in various changes and modifications which fall within the scope of the invention as claimed.

Claims

1. The utility model provides a circular cone probability sieve, its characterized in that is including the sieve case, set up in the screen frame of sieve incasement portion and set up in the support of sieve bottom of the case portion, wherein the screen frame is by supporting the cone, set up and locate the annular stick sieve on supporting the cone in the tripper at support cone top and cover and constitute, the bottom of supporting the cone is fixed in on the support through damping spring, the downside mid-mounting of support cone has vibrating device, be equipped with undersize thing passageway chamber and oversize thing passageway chamber on the support, the upper portion of sieve case is equipped with the feed inlet relative with the tripper and the bottom of this sieve case is sealed to be fixed in on the oversize thing passageway chamber.

2. The conical probability screen of claim 1, wherein: the support cone is last by last to being equipped with the annular stick sieve of multilayer that the sieve mesh diminishes gradually down in proper order, this annular stick sieve includes annular sieve strip mounting base and follows the grating of circumferencial direction equipartition on annular sieve strip mounting base excircle.

3. The conical probability screen of claim 2, wherein: the annular sieve strip mounting base is provided with a plurality of obliquely arranged sieve strip inserting holes along the circumferential direction, the sieve strips are inserted and fixed in the sieve strip inserting holes of the annular sieve strip mounting base and obliquely arranged towards the same side, and the opening gaps between the adjacent sieve strips are of a structure with a small inside and a large outside.

4. The conical probability screen of claim 2 or 3, wherein: the same-direction inclination angle of the screen bars is 0-70 degrees.

5. The conical probability screen of claim 1, wherein: the annular bar sieve plate is sleeved with the annular bar mounting base and mounted on the supporting cone, an annular supporting boss used for supporting the annular bar sieve plate is arranged on the supporting cone at the lower part of the annular bar mounting base, the annular bar sieve plate is arranged on the annular supporting boss, and the supporting and positioning of the annular bar sieve plate are realized through the supporting cone and the annular supporting boss.

6. The conical probability screen of claim 1, wherein: the support is provided with an undersize material channel cavity which extends to the bottom of the adjacent lower-layer annular bar screen plate and is consistent with the screening area of the annular bar screen plate, the bottom of the support cone is fixed on a spring mounting seat of the support through a plurality of groups of damping springs which are uniformly distributed, and the center of the bottom of the support cone is provided with a vibrating device.