Classifying screen with automatic screen cleaning and anti-blocking structure
By installing a vibrator on the screen plate of the graded screen, the excitation force is used to automatically clean the blocked materials, the problem of easy blockage of screen holes during the sieving of rice particles is solved, automatic cleaning and efficient screening are achieved, and operating costs are reduced.
Patent Information
- Application Number
- CN202420120451.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-18
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-01-18
AI Technical Summary
When sifting rice grains in existing graded sieves, due to the special shape of the rice grains, the screen holes are easily blocked, which will affect the sorting effect of the screen plate. They require manual cleaning, which increases the cost and time of use.
A hierarchical screen with an automatic screen cleaning and anti-blocking structure was designed. A vibrator was installed on the screen plate. By providing local excitation force when the screen plate is blocked, the vibration frequency and amplitude of the screen plate are increased, thereby vibrating the blocked material and realizing automatic cleaning.
It realizes automatic cleaning of screen plates under the power-on state, avoids the need for manual cleaning, improves screening efficiency and equipment service life, and reduces operating costs.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grading screens, in particular to a grading screen with an automatic screening and anti-blocking structure. Background Art
[0002] The grading screen utilizes the differences in different particle types of materials to perform overlapping rotations and friction propulsion on the flat rotating screen surface to form automatic grading and select materials of various grades. The screening effect is directly related to the pass rate of the holes in the screen plate. To ensure that the material can pass through smoothly, it is necessary to ensure that the holes in the screen plate are unobstructed and not blocked by the material.
[0003] The previous technology was to place a jump ball in the screen frame, and drive the jump ball up and down to hit the screen plate through the operation of the screen body to solve the problem of materials blocking the screen holes. This method is simple and cost-effective, but if the screen plate material layer becomes thicker and the material size is close to the screen holes, the cleaning effect of the jump ball hitting the screen plate will deteriorate, and the screen holes will become more and more blocked, forming a vicious circle.
[0004] Especially when screening rice grains, due to the special shape of rice grains, most of the sieve holes will be gradually blocked by rice grains after 2 hours of processing. When 80% of the holes on the sieve plate are blocked, the jumping ball will basically have no effect, thus affecting the sorting effect of the sieve plate. At this time, the sieve plate must be taken out for manual cleaning, which greatly increases the cost of use and is time-consuming and labor-intensive.
[0005] Based on this, the utility model designs a grading screen with an automatic screening and anti-blocking structure to solve the above problems. Utility Model Content
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grading screen with an automatic screening and anti-blocking structure, comprising a sieve plate for screening materials, a driving unit for driving the sieve plate to perform a rotary motion, and a body for installing the sieve plate and the driving unit, at least one vibrator being fixedly mounted on the sieve plate, and the vibrator being used to provide local exciting force to the sieve plate when the sieve plate is blocked so as to increase the amplitude and frequency of the vibration of the sieve plate.
[0007] As a further solution of the utility model, the screen plate includes a screen and a frame for supporting the screen, and the vibrator is fixedly mounted on the upper surface of the screen and / or the frame.
[0008] As a further solution of the utility model, a trawl is fixedly installed on the bottom of the frame, and a plurality of jumping balls are placed between the trawl and the screen.
[0009] As a further solution of the utility model, the aperture of the trawl is larger than the aperture of the sieve holes on the surface of the screen, and smaller than the diameter of the jump ball.
[0010] As a further solution of the utility model, the frame is composed of a plurality of cross bars and a plurality of longitudinal bars, and the cross bars and longitudinal bars are staggered to divide the space between the screen and the trawl into a plurality of activity areas of the same size, and at least one jump ball is placed in each activity area.
[0011] As a further solution of the utility model, the heights of the horizontal bar and the vertical bar are not greater than the diameter of the jump ball.
[0012] As a further solution of the utility model, a mounting frame for mounting a vibrator is fixedly provided on the surface of the longitudinal rod or the cross rod, and the vibrator is installed between the screen and the trawl net.
[0013] As a further solution of the present invention, the mesh holes in the area where the mesh contacts the crossbar or the longitudinal bar are in a closed state.
[0014] As a further solution of the utility model, the vibrator is centrally controlled by a controller.
[0015] As a further solution of the utility model, the lower surface of the screen is fixedly connected to a cross bar, and the axial direction of the cross bar is the same as the material flow direction.
[0016] The utility model has the following beneficial effects:
[0017] The utility model drives the screen plate to perform rotational motion through a driving unit, and at the same time installs a vibrator on the screen surface and / or the frame. The vibrator can provide local exciting force for the screen. When the blockage rate of the screen holes on the screen surface is high, the vibrator can be started to provide local exciting force for the screen, thereby increasing the vibration frequency of the screen and increasing the amplitude of the screen. The materials blocked in the screen holes on the screen surface can be vibrated out through vibration, thereby achieving automatic cleaning when the machine is turned on, and there is no need to stop the machine for manual cleaning.
[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0021] Figure 2 It is a side view schematic diagram of the utility model.
[0022] Figure 3 It is a partial schematic diagram of the screen in the utility model.
[0023] Figure 4 It is a partial schematic diagram of the trawl in the utility model.
[0024] Legend:
[0025] 1. Screen plate; 2. Vibrator; 3. Frame; 31. Cross bar; 32. Longitudinal bar; 4. Trawl net; 5. Jump ball; 6. Mounting frame. DETAILED DESCRIPTION
[0026] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.
[0027] See also Figure 1-4 The utility model provides a technical solution: a grading screen with an automatic screening and anti-blocking structure, including a sieve plate for screening materials, a driving unit for driving the sieve plate to perform a rotary motion, and a body for installing the sieve plate and the driving unit. At least one vibrator 2 is fixedly installed on the sieve plate. The vibrator 2 is used to provide a local exciting force for the sieve plate when the sieve plate is blocked to increase the amplitude and frequency of the vibration of the sieve plate.
[0028] In this embodiment, the screen plate is elastically connected to the body (not shown in the figure), and then the driving unit (not shown in the figure) provides a rotational force for the screen plate. The driving unit generally uses a motor to drive the eccentric wheel, and the centrifugal force of the rotation of the eccentric wheel causes the screen plate to rotate and vibrate at the same time. This state can be defined as a working state. At this time, the vibration is a vibration with low frequency and small amplitude, which prevents the material from jumping too much on the surface of the screen plate so that the material can fully contact the surface of the screen plate to increase the screening efficiency. The screen plate is installed on the body at an angle, so that when the material falls on the screen plate, it will flow from high to low along the surface of the screen plate. At this time, the rotational motion of the screen plate will accelerate the flow of the material while dispersing the accumulated material, so that the material forms a thin layer on the surface of the screen plate, so that the material can fully contact the sieve holes on the surface of the screen plate. Under the rotational motion and vibration of the screen plate, the material on the surface of the screen plate The materials smaller than the sieve holes will pass through the sieve holes. During the screening process, the materials with similar size to the sieve holes may be blocked in the sieve holes. At this time, the rotational motion of the sieve plate is not enough to separate the materials from the sieve holes. Next, the vibrator 2 fixedly mounted on the sieve plate can be started. The vibrator 2 generates an exciting force to drive the sieve plate to vibrate irregularly. This state can be defined as a cleaning state. In the cleaning state, the amplitude of the sieve plate increases and the frequency increases. The materials blocked in the sieve holes on the surface of the sieve plate are vibrated out through vibration to restore the sieve holes to normal state. When the blockage of the sieve holes on the surface of the sieve plate returns to normal state, the vibrator 2 is turned off to restore the sieve plate to the working state and maintain efficient screening. The low frequency and small amplitude mentioned above are only a comparison between the working state and the cleaning state. The actual frequency and amplitude are adjusted in real time according to the flow rate, type and specifications of the sieve plate of the material.
[0029] The device drives the sieve plate alone by a driving unit or drives the sieve plate together with the driving unit and the vibrator 2, so that the sieve plate can be switched between a working state and a cleaning state. In the working state, the sieve plate makes a rotary motion and the vibration frequency and amplitude are small, so that the material can fully contact the sieve holes on the surface of the sieve plate, thereby improving the screening efficiency. In the cleaning state, the sieve plate is in a high-frequency vibration state, at which time the amplitude and frequency of the sieve plate are greater than those in the working state. The material blocked in the sieve holes is separated from the sieve holes by the high-frequency vibration of the sieve plate. In the cleaning state, the sieve plate can be automatically and efficiently cleaned without manual cleaning after shutdown, while efficient screening of materials can be guaranteed in the working state. The two states can be switched freely, making the overall device simpler and more efficient to use.
[0030] like Figure 1-2 As shown, the sieve plate includes a sieve 1 and a frame 3 for supporting the sieve 1 , and the vibrator 2 is fixedly mounted on the upper surface of the sieve 1 and / or the frame 3 .
[0031] In this embodiment, the screen plate is composed of a screen 1 and a frame 2 at the bottom thereof. The vibrator 2 is fixedly mounted on the upper surface of the screen and / or the frame 3 at the bottom of the screen. When the vibrator 2 is fixed on the frame 3 at the bottom of the screen, it will not affect the flow of material on the upper surface of the screen. Whether the vibrator 2 is mounted on the screen surface or the frame 3, it can directly transmit vibration to the screen.
[0032] like Figure 1-2 As shown, a trawl net 4 is fixedly installed at the bottom of the frame 3, and a plurality of jumping balls 5 are placed between the trawl net 4 and the screen.
[0033] In the present embodiment, in the working state, irregular bounces will occur when the jumping ball 5 hits the frame 3, so that the jumping ball 5 has a chance to hit the screen above it, and vibration is generated by the jumping ball 5 hitting the screen. In the working state, the materials blocked in the screen holes on the screen surface are vibrated out of the screen holes, and in the cleaning state, the vibration frequency and amplitude of the screen, the frame 3 and the bottom trawl net 4 are increased, thereby increasing the force and frequency of the jumping ball 5 hitting the screen. In the cleaning state, not only the cleaning effect of the screen itself will be increased, but the cleaning effect of the jumping ball 5 on the screen will also be increased. The superposition of the two effects can further increase the cleaning effect of the screen in the cleaning state. At the same time, the screen can also be simply cleaned by the jumping ball 5 in the working state.
[0034] like Figure 1-4 As shown, the aperture of the trawl net 4 is larger than the aperture of the sieve holes on the surface of the screen, and smaller than the diameter of the jump ball 5.
[0035] In this embodiment, the aperture of the trawl net 4 is larger than the aperture of the sieve holes on the screen surface, so that the material can easily pass through the trawl net 4 after passing through the screen, and will not stay on the trawl net 4 and the screen surface. The aperture of the trawl net 4 is smaller than the diameter of the jump ball 5 in order to limit the jump ball 5 and prevent the jump ball 5 from passing through the holes of the trawl net 4.
[0036] like Figure 1-2 As shown, the frame 3 is composed of a plurality of transverse bars 31 and a plurality of longitudinal bars 32. The transverse bars 31 and the longitudinal bars 32 are staggered to divide the space between the screen and the trawl net 4 into a plurality of activity areas of the same size, and at least one jumping ball 5 is placed in each activity area.
[0037] In this embodiment, the bottom of the screen is divided into a number of activity areas of the same size by crisscrossing the horizontal bars 31 and the vertical bars 32, and at least one jump ball 5 is placed in each activity area, so that the jump ball 5 can be confined in the activity area, and the activity range of each jump ball 5 is limited to ensure that the jump ball 5 hits every area of the screen as evenly as possible. The more horizontal bars 31 and the vertical bars 32, the more activity areas there are, and the smaller they are, and the more precise the control of the jump ball 5 is.
[0038] like Figure 1-4As shown, the heights of the crossbar 31 and the longitudinal bar 32 are not greater than the diameter of the jump ball 5 .
[0039] In this embodiment, the height of the cross bar 31 is the gap between the longitudinal bar 32 and the screen, and the height of the longitudinal bar 32 is the gap between the cross bar 31 and the trawl net 4. By controlling the heights of the cross bar 31 and the longitudinal bar 32, the jump ball 5 is prevented from passing through the gap between the longitudinal bar 32 and the screen and the gap between the cross bar 31 and the trawl net 4, thereby preventing the jump ball 5 from leaving the corresponding activity area.
[0040] like Figure 1-4 As shown, a mounting bracket 6 for mounting the vibrator 2 is fixedly provided on the contact surface between the longitudinal rod 32 and the transverse rod 31 or the contact surface between the transverse rod 31 and the longitudinal rod 32 , and the vibrator 2 is mounted between the screen and the trawl net 4 .
[0041] In this embodiment, the vibrator 2 is installed in the middle of the frame 3 through the mounting bracket 6 .
[0042] like Figure 1-4 As shown, the mesh holes in the area where the mesh contacts the transverse rod 31 or the longitudinal rod 32 are in a closed state.
[0043] In this embodiment, when the horizontal bar 31 or the vertical bar 32 contacts the lower surface of the screen, the sieve holes on the screen surface will be blocked to form blind holes. Therefore, the sieve holes in the contact area between the screen and the horizontal bar 31 or the vertical bar 32 are eliminated to prevent materials from getting stuck in the blind holes.
[0044] The vibrator 2 is centrally controlled by a controller.
[0045] In this embodiment, the vibrator 2 is centrally controlled by a controller. Before operation, the exciting force, start time and start / stop interval of the vibrator 2 can be set according to the type of material, flow rate and specifications of the screen, so as to realize automatic start and stop, making the use of the overall device more intelligent.
[0046] like Figure 1-4 As shown, the lower surface of the screen is fixedly connected to the cross bar 31, and the axial direction of the cross bar 31 is the same as the material flow direction.
[0047] In this embodiment, the axial direction of the cross bar 31 is the same as the material flow direction, so that there is enough space in the middle of the screen frame to install the vibrator 2 and wire.
[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A grading screen with an automatic screening and anti-blocking structure, comprising a screen plate for screening materials, a driving unit for driving the screen plate to perform a rotary motion, and a body for mounting the screen plate and the driving unit, characterized in that: At least one vibrator (2) is fixedly mounted on the sieve plate, and the vibrator (2) is used to provide a local exciting force for the sieve plate when the sieve plate is blocked, so as to increase the amplitude and frequency of vibration of the sieve plate.
2. The grading screen with automatic screening and anti-blocking structure according to claim 1 is characterized in that: The sieve plate comprises a sieve (1) and a frame (3) for supporting the sieve (1), and the vibrator (2) is fixedly mounted on the upper surface of the sieve (1) and / or the frame (3).
3. The grading screen with automatic screening and anti-blocking structure according to claim 2 is characterized in that: A trawl net (4) is fixedly mounted on the bottom of the frame (3), and a plurality of jumping balls (5) are placed between the trawl net (4) and the screen (1).
4. The grading screen with automatic screening and anti-blocking structure according to claim 3 is characterized in that: The aperture of the trawl net (4) is larger than the aperture of the sieve holes on the surface of the screen (1) and smaller than the diameter of the jumping ball (5).
5. The grading screen with automatic screening and anti-blocking structure according to claim 3 is characterized in that: The frame (3) is composed of a plurality of cross bars (31) and a plurality of longitudinal bars (32), wherein the cross bars (31) and the longitudinal bars (32) are staggered to divide the space between the screen (1) and the trawl net (4) into a plurality of activity areas of the same size, and at least one jumping ball (5) is placed in each activity area.
6. The grading screen with automatic screening and anti-blocking structure according to claim 5 is characterized in that: The heights of the crossbar (31) and the longitudinal bar (32) are not greater than the diameter of the jump ball (5).
7. The grading screen with automatic screening and anti-blocking structure according to claim 5, characterized in that: A mounting frame (6) for mounting a vibrator (2) is fixedly provided on the surface of the longitudinal rod (32) or the transverse rod (31), and the vibrator (2) is mounted between the screen (1) and the trawl net (4).
8. The grading screen with automatic screening and anti-blocking structure according to claim 5 is characterized in that: The mesh holes in the area where the screen (1) contacts the crossbar (31) or the longitudinal bar (32) are in a closed state.
9. The grading screen with automatic screening and anti-blocking structure according to claim 1, characterized in that: The vibrator (2) is centrally controlled by a controller.
10. The grading screen with automatic screening and anti-blocking structure according to claim 5, characterized in that: The lower surface of the screen (1) is fixedly connected to a cross bar (31), and the axial direction of the cross bar (31) is the same as the material flow direction.