Graded screening device for particle materials

Abstract

The utility model discloses a particle material grading and screening device, which relates to the technical field of particle grading equipment and comprises a screening box and a screening plate arranged in the screening box, a plurality of groups of screening holes are formed in the screening plate, containing grooves are formed in the inner walls of the screening holes, air bags are arranged in the containing grooves, limiting plates are arranged in the screening holes, and the limiting plates are arranged on the screening box. A plurality of sets of limiting plates are arranged and distributed along the central axis of the screening holes, telescopic pipes are arranged on the air bags and connected with the limiting plates, an air pump communicated with the air bags is arranged outside the screening box, and the sizes of the screening holes of the screening plates placed inside the screening box traditionally are fixed. When needing other sieve holes with different sizes, a worker needs to enter the sieve holes to replace the sieve holes, time and labor are wasted, the labor amount is large, certain potential safety hazards exist, and the passing range of the sieve holes can be conveniently adjusted by the worker.

Description

Technical Field

[0001] The utility model relates to the technical field of particle classification equipment, in particular to a particle material classification and screening device. Background Art

[0002] A screening device is a device that separates materials by particle diameter. It mainly compares the diameter of the sieve holes on the sieve plate with the diameter of the material particles, so as to achieve the purpose of distinguishing and selecting the required particles. At present, certain crystal particles are often required in chemical operations, but some crystal particles are of different sizes, so particles of different sizes need to be selected and separated; in other industries, in order to strictly ensure the size uniformity of the particle products, a screening device must be used for processing to meet the qualified requirements.

[0003] The Chinese utility model patent with application number CN201320552233.3 discloses a granular material grading and screening device, which consists of a screening box, an upper screen plate, a lower screen plate, a spring vibrator, and a control console. The screening box is in the shape of a rectangular parallelepiped and is welded from steel plates. The upper screen plate is installed obliquely in the screening box and has evenly spaced screen holes on the plate. The lower screen plate is installed in an inclined direction opposite to that of the upper screen plate, and the screen hole diameter of the lower screen plate is smaller than that of the upper screen plate, so as to play a role in graded screening. The spring vibrator is located at the bottom of the screening box to control the up and down reciprocating vibration of the entire screening box, thereby speeding up the screening speed and improving the screening quality. The control console is equipped with a motor to control the vibration frequency and amplitude of the spring vibrator. The original granular material enters the screening box and passes through two screening processes of the upper and lower screen plates to complete the graded screening operation.

[0004] However, the sieve holes of the sieve plate placed inside the screening box have a fixed size. When personnel need other sieve hole sizes, they need to enter the interior to replace them, which is time-consuming and labor-intensive, and there are certain safety hazards. Utility Model Content

[0005] The utility model aims to provide a granular material grading and screening device, which can facilitate personnel to adjust the passing range of the sieve holes.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: a granular material grading and screening device, including a screening box and a sieve plate arranged therein, the sieve plate is provided with several groups of sieve holes, the inner wall of the sieve hole is provided with a receiving groove, an airbag is provided in the receiving groove, a limiting plate is provided in the sieve hole, the limiting plates are provided in several groups and distributed along the central axis of the sieve hole, a telescopic tube is provided on the airbag and connected to the limiting plate, and an air pump communicating with the airbag is provided on the outside of the screening box.

[0007] Preferably, the outer cover of the telescopic tube is provided with a telescopic spring.

[0008] Preferably, a branch tube is provided outside the airbag, the air delivery end of the air pump is connected to an expansion tube, and each group of the airbags is connected to the expansion tube through the branch tube.

[0009] Preferably, a reversing valve is provided at the connection point between the expansion tube and the air delivery end of the air pump, and the air suction end of the air pump is in communication with the reversing valve.

[0010] Preferably, a flexible pad is provided on the inner wall of the sieve hole, and the telescopic tube passes through the flexible pad and is connected to the limiting plate.

[0011] Preferably, the branch pipe and the expansion pipe are both buried in the sieve plate.

[0012] Beneficial effects of the utility model:

[0013] By arranging a limit plate in the sieve hole, an air bag is arranged in the receiving groove in the sieve hole, which is communicated with the air bag through a telescopic tube, and the telescopic tube is connected to the limit plate, an air pump enters the branch tube through the expansion tube to take air in and out of the air bag, thereby adjusting the extension state of the telescopic tube, so that the limit plate moves in the sieve hole, changing the size range of the sieve hole for particulate material passing through the sieve hole, and changing the filtration range of the sieve hole is more convenient. Compared with the existing technology, the utility model reduces a certain amount of labor for personnel, and can indirectly drive the limit plate by driving the air bag to adjust the passing size range of the sieve hole. There is no need for personnel to manually enter to adjust, which also reduces certain safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram for illustrating the upper structure of the screening box in one embodiment of the present invention;

[0015] Figure 2 for Figure 1 Enlarged view of part A;

[0016] Figure 3 This is a side sectional view showing the internal structure of the screening box in one embodiment of the present invention;

[0017] Figure 4 for Figure 3 Enlarged view of part B;

[0018] Figure 5 This is an exploded view used to separately display part of the structure on the sieve plate in one embodiment of the present invention;

[0019] Figure 6 for Figure 5 Magnified view of part C.

[0020] Figure numerals: 1. screening box; 2. sieve plate; 3. sieve hole; 4. receiving groove; 5. air bag; 6. limit plate; 7. telescopic tube; 8. air pump; 9. telescopic spring; 10. branch pipe; 11. expansion pipe; 12. air supply end; 13. reversing valve; 14. air intake end; 15. flexible pad. DETAILED DESCRIPTION

[0021] The following is only a preferred embodiment of the present invention, and the scope of protection is not limited to this embodiment. All technical solutions under the concept of the present invention should fall within the scope of protection of the present invention. At the same time, it should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as within the scope of protection of the present invention.

[0022] It should be noted that in this article, relational terms such as first and second, such as "connector board one, connector board two", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0023] The directional words mentioned in this embodiment, such as "up, down, left, right", etc., are only used in conjunction with the drawings to enable technicians in this technical field to understand the relationship between various features or parts.

[0024] In this embodiment, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in this utility model according to specific circumstances.

[0025] like Figures 1 to 6 As shown, a granular material grading and screening device includes a screening box 1 and a sieve plate 2 obliquely arranged therein, and a plurality of groups of sieve holes 3 are provided on the sieve plate 2 along its length and width. The inner wall of each group of sieve holes 3 is provided with an annular receiving groove 4, and an air bag 5 is provided in the receiving groove 4. A limiting plate 6 is provided inside the sieve hole 3. In this embodiment, four groups of arc-shaped limiting plates 6 are provided in one group of sieve holes 3, and the four groups of limiting plates 6 are distributed along the central axis of the sieve hole 3. A flexible pad 15 is provided on the inner wall of the sieve hole 3, and a telescopic tube 7 is provided on the air bag 5. One end of the telescopic tube 7 passes through the flexible pad 15 and is connected to the limiting plate 6. The outer sleeve of the telescopic tube 7 is provided with a telescopic spring 9, and one end of the telescopic spring 9 is connected to the limiting plate 6, and the other end thereof is connected to the inner wall of the receiving groove 4.

[0026] An air pump 8 is provided on the outside of the screening box 1. The air pump 8 has an air delivery end 12 and an air suction end 14. The air delivery end 12 of the air pump 8 is connected to an expansion tube 11, and a branch tube 10 is provided on the air bag 5. In this embodiment, the branch tube 10 and the expansion tube 11 are both buried in the sieve plate 2. Each group of air bags 5 is connected to the expansion tube 11 through the branch tube 10. A reversing valve 13 is provided at the connection between the expansion tube 11 and the air delivery end 12 of the air pump 8. The air suction end 14 of the air pump 8 is connected to the reversing valve 13. The purpose is that personnel can adjust the air delivery end 12 and the air suction end 14 of the air pump 8 and the expansion tube 11 through the reversing valve 13 to achieve gas circulation.

[0027] When the personnel do not adjust the passing size range of the sieve hole 3, the air pump 8 is in a stopped state, the airbag 5 is in an airless state, the telescopic spring 9 is in a retracted state, pulling the limit plate 6 away from the center of the sieve hole 3, and the flexible pad 15 is in a compressed state.

[0028] When the personnel needs to adjust the size range of the material passing through the sieve hole 3, they first start the air pump 8 through the control system (not shown in the attached figure), and the reversing valve 13 connects the air supply end 12 of the air pump 8 with the expansion tube 11. The air pump 8 starts to supply air to the airbag 5 through the expansion tube 11 and the branch tube 10. The air in the airbag 5 enters each telescopic tube 7, and each group of telescopic tubes 7 begins to extend. The telescopic spring 9 is stretched, and the limit plate 6 inside a sieve hole 3 is synchronously pushed to move horizontally toward the center of the sieve hole 3, thereby changing the size range of the material passing through the inside of the sieve hole 3. When the reversing valve 13 connects the air intake end 14 of the air pump 8 with the expansion tube 11, the air pump 8 starts to start, the air inside the airbag 5 will be transported away, the telescopic spring 9 starts to reset and move, pulling the telescopic tube 7 to retract, and the limit plate 6 synchronously moves away from the center of the sieve hole 3.

[0029] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the scope of protection of the present invention.

Claims

1. A granular material classification and screening device, comprising a screening box (1) and a screen plate (2) arranged therein, wherein the screen plate (2) is provided with a plurality of groups of screen holes (3). It is characterized by: The inner wall of the sieve hole (3) is provided with a receiving groove (4), and an air bag (5) is provided in the receiving groove (4); A limiting plate (6) is provided in the sieve hole (3), and the limiting plates (6) are provided in a plurality of groups and distributed along the central axis of the sieve hole (3); The air bag (5) is provided with a telescopic tube (7) connected to the limit plate (6), and the outside of the screening box (1) is provided with an air pump (8) communicating with the air bag (5).

2. A granular material classification and screening device according to claim 1, characterized in that: The outer cover of the telescopic tube (7) is provided with a telescopic spring (9).

3. A granular material classification and screening device according to claim 1, characterized in that: The airbag (5) is provided with a branch pipe (10) outside, the air delivery end (12) of the air pump (8) is connected to the expansion pipe (11), and each group of the airbags (5) is connected to the expansion pipe (11) through the branch pipe (10).

4. A granular material classification and screening device according to claim 3, characterized in that: A reversing valve (13) is provided at the connection point between the expansion tube (11) and the air delivery end (12) of the air pump (8), and the air intake end (14) of the air pump (8) is in communication with the reversing valve (13).

5. The device for grading and screening particulate materials according to claim 1, characterized in that: A flexible pad (15) is provided on the inner wall of the sieve hole (3), and the telescopic tube (7) passes through the flexible pad (15) and is connected to the limiting plate (6).

6. A granular material classification and screening device according to claim 3, characterized in that: The branch pipe (10) and the expansion pipe (11) are both buried in the sieve plate (2).

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