Rotary vibration screen and screening method for damageable materials

Abstract

The invention provides a spin-vibration screen and a screening method for damageable materials, in a finished product screen module of the spin-vibration screen, an outer screen frame and an inner screen frame which are arranged at an interval are designed, a plurality of groups of obliquely arranged discharge runners are arranged in a clearance between the outer screen frame and the inner screen frame, and the bottom of each group of discharge runners is connected with a finished product discharge port; during screening, materials fall into the finished product screen, small-particle materials are screened out of the finished product screen by vibrating the finished product screen, and the finished product materials which are not screened out by the finished product screen directly fall into the clearance through the periphery of the finished product screen and then flow into the finished product discharging port through the discharging runners in the clearance, so that the material output path is effectively shortened, and the screening efficiency is improved. And the obliquely-arranged discharging flow channel can quickly guide the finished product materials to the finished product discharging opening, abrasion of the materials is effectively reduced, and even lossless output can be achieved. And the screening quality of the materials is improved, and unnecessary economic losses are reduced.

Description

Technical Field

[0001] The invention relates to the field of material screening, and in particular to a rotary vibrating screen and a screening method for fragile materials. Background Art

[0002] The rotary vibrating screen controls the trajectory of material particles on the screen by controlling the angle between the upper and lower weights, and can realize the movement of particles in three directions, so it is also called a three-dimensional rotary vibrating screen. The rotary vibrating screen can efficiently filter and grade various materials, and is particularly suitable for screening fine materials. Conventional rotary vibrating screens only have one lateral discharge port on each layer of the screen frame, and rely on the material particles to move outward in a spiral path clockwise or counterclockwise to gradually enter the discharge port, thereby realizing material removal and collection. This will cause the material particles distributed at different positions on the screen to need to go through different paths to reach the discharge port, especially the material particles distributed on the opposite side of the feed end of the discharge port need to rotate one more circle before entering the discharge port, resulting in a long stay on the screen and the screen frame wall, and repeated friction and collision with the screen and the screen frame.

[0003] In this way, when screening some fragile materials, the fragile materials will rub and collide with the screen and screen frame for a long time, and the materials cannot be discharged in time, which will damage the surface quality of the materials, inevitably affect the screening accuracy and material quality, and also cause unnecessary economic losses. Summary of the invention

[0004] Therefore, in order to solve the above problems, the present invention provides a rotary vibrating screen and a method for screening fragile materials.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] A rotary vibrating screen comprises a finished product screen module group, the finished product screen module group comprises an outer screen frame, an inner screen frame, a finished product screen and a finished product discharge port, the inner screen frame is arranged on the inner side of the outer screen frame and is spaced apart from the inner screen frame to form an avoidance gap, the finished product screen is assembled on the inner screen frame, and a plurality of groups of inclined discharge flow channels are arranged in the avoidance gap between the outer screen frame and the inner screen frame, and the bottom of each group of discharge flow channels is connected to the finished product discharge port.

[0007] Furthermore, a flow channel baffle is arranged in the avoidance gap between the outer screen frame and the inner screen frame, and the discharge flow channel is composed of the flow channel baffle.

[0008] Furthermore, the avoidance gap between the outer screen frame and the inner screen frame is a circular ring-shaped gap, and the plurality of discharge flow channels are evenly distributed in the circular ring-shaped avoidance gap.

[0009] Furthermore, each group of discharge channels has a "V"-shaped structure, and the finished product discharge port is arranged at the bottom of the "V"-shaped discharge channel.

[0010] Furthermore, the flow channel baffle has a plurality of inclined support plates that are bent reciprocatingly up and down, and two adjacent inclined support plates form a "V"-shaped discharge flow channel, and the finished product discharge port is arranged at the bottom of the "V"-shaped discharge flow channel.

[0011] Furthermore, the outer screen frame and the inner screen frame are fixedly connected via a flow channel baffle.

[0012] Furthermore, a vibration frame is provided on the inner screen frame, and the finished screen is laid on the vibration frame.

[0013] Furthermore, a bottom plate is fixed to the bottom of the outer screen frame and the inner screen frame, and a final-stage discharge port is provided on the inner screen frame or the bottom plate for the final-stage material falling onto the bottom plate to be discharged.

[0014] Furthermore, the rotary vibrating screen also includes a grading screen module and a top cover. The grading screen module is arranged on the upper layer of the finished product screen module. The grading screen module includes a connecting frame, a grading screen and a grading outlet. The connecting frame is fixed on the outer screen frame of the finished product screen module, the grading screen is assembled in the connecting frame, and the grading outlet is arranged on the connecting frame for output of materials that are not screened out by the grading screen; the sieve hole diameter of the grading screen is larger than the sieve hole diameter of the finished product screen, and the top cover covers the top of the connecting frame and opens a feed inlet.

[0015] A screening method for fragile materials includes the above-mentioned rotary vibrating screen. The material falls into the finished product screen, and the small particles of material are screened out from the finished product screen by vibrating the finished product screen. The finished product material that is not screened out by the finished product screen falls into the escape gap through the periphery of the finished product screen, and then flows into the finished product discharge port through various discharge flow channels in the escape gap, and is finally discharged through the finished product discharge port.

[0016] The technical solution provided by the present invention has the following beneficial effects:

[0017] In the finished product screen module for screening out the finished product material, an outer screen frame and an inner screen frame are designed to be spaced apart, and a plurality of inclined discharge channels are arranged in the avoidance gap between the outer screen frame and the inner screen frame, and the bottom of each group of discharge channels is connected to the finished product discharge port; during screening, the material falls into the finished product screen, and the finished product screen is vibrated to screen out small particles from the finished product screen, and the finished product material that is not screened out by the finished product screen directly falls into the avoidance gap through the periphery of the finished product screen, and then flows into the finished product discharge port through each discharge channel in the avoidance gap, which effectively shortens the material output path, and the inclined discharge channel can quickly guide the finished material to the finished product discharge port, effectively reducing the wear of the material, and even achieving lossless output. Improve the screening quality of the material and reduce unnecessary economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows the appearance of the rotary vibrating screen in the embodiment, in which part of the top cover and the connecting frame structure are cut off.

[0019] Figure 2 Shown is a cross-sectional view of a rotary vibrating screen in an embodiment;

[0020] Figure 3 The figure shows the appearance of the finished screen module in the embodiment;

[0021] Figure 4 Shown is a schematic diagram of the structural decomposition of the finished screen module in the embodiment. DETAILED DESCRIPTION

[0022] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0024] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0025] Reference Figures 1 to 4 As shown, a rotary vibrating screen provided in this embodiment includes a finished product screen module 10, and the finished product screen module 10 includes an outer screen frame 11, an inner screen frame 12, a finished product screen 15 and a finished product discharge port 14. The inner screen frame 12 is arranged on the inner side of the outer screen frame 11 and is spaced apart from the inner screen frame 11 to form a space-avoiding gap 101. The finished product screen 15 is assembled on the inner screen frame 11, that is, the periphery of the finished product screen 15 is space-avoiding and not blocked. A plurality of groups of inclined discharge channels 102 are arranged in the space-avoiding gap 101 between the outer screen frame 11 and the inner screen frame 12, and the bottom of each group of discharge channels 102 is connected to the finished product discharge port 14. As in this embodiment, the space-avoiding gap 101 between the outer screen frame 11 and the inner screen frame 12 is a circular gap, and the number of the discharge channels 102 is four groups, and the four groups of discharge channels 102 are evenly distributed in the circular space-avoiding gap 101.

[0026] The present embodiment also provides a screening method for fragile materials based on the above-mentioned rotary vibrating screen, including the above-mentioned rotary vibrating screen, the material falls into the finished product screen 15, and the small particle material is filtered out from the finished product screen 15 by vibrating the finished product screen 15, and the finished product material that is not filtered out by the finished product screen 15 moves outward in a spiral shape due to the vibration of the finished product screen 15, and directly falls from the periphery of the finished product screen 15 into each discharge flow channel 102 of the avoidance gap 101, and then flows into the corresponding finished product discharge port 14 through each discharge flow channel 102, and finally outputs through the finished product discharge port 14. In this way, the movement path of the material in the periphery is greatly shortened. At the same time, the setting of the inclined discharge flow channel 102 enables the material to have a vertical discharge path, and can slide down from the discharge flow channel 102 to the finished product discharge port 14 for output more quickly; for example, the material can even fall from the periphery of the finished product screen 15 and be output before contacting the outer screen frame 11, effectively reducing the wear of the material, and even achieving lossless output. Improve the screening quality of materials and reduce unnecessary economic losses.

[0027] Specifically, in the present embodiment, each group of discharge channels 102 is in a "V"-shaped structure, and the finished product discharge port 14 is arranged at the bottom of the "V"-shaped discharge channel 102. The design of four groups of "V"-shaped discharge channels 102 divides the circular avoidance gap 101 into eight inclined slideways. Even after the material falls from the periphery of the finished product screen 15, the longest path is only one-eighth of the original full circle; coupled with the inclined setting, the transmission time of the periphery is greatly shortened, and the quality of the material is well guaranteed, which is a more preferred solution. Of course, in other embodiments, the number of discharge channels 102 can be selected according to actual conditions, and the multiple groups of discharge channels in the present application are two or more groups. At the same time, each group of discharge channels 102 is not limited to a "V"-shaped structure, but can also be just a single inclined slide structure, etc.

[0028] Specifically, a flow channel baffle 13 is provided in the space 101 between the outer screen frame 11 and the inner screen frame 12, and the discharge flow channel 102 is formed by the flow channel baffle 13; the structure of the flow channel baffle 13 is simpler. More specifically, the flow channel baffle 13 has a plurality of inclined support plates 131 that are bent back and forth up and down, and two adjacent inclined support plates 131 form a group of "V"-shaped discharge flow channels 102, forming a total of four groups of discharge flow channels 102.

[0029] The outer screen frame 11 and the inner screen frame 12 are fixedly connected by the flow channel baffle 13. For example, in the present embodiment, the flow channel baffle 13 can be fixed to the outer side wall of the inner screen frame 12 by welding or other processes. After the outer screen frame 11 is installed, the flow channel baffle 13 is fixed to the inner side wall of the outer screen frame 11 by welding or other processes. In this way, not only the outer screen frame 11 and the inner screen frame 12 are fixedly connected, but also the gap between the flow channel baffle 13 and the outer screen frame 11 and between the flow channel baffle 13 and the inner screen frame 12 is avoided to cause the material particles to fall. Of course, in other embodiments, the outer screen frame 11 and the inner screen frame 12 can also be fixed by other methods, and the flow channel baffle 13 and the outer screen frame 11 as well as the flow channel baffle 13 and the inner screen frame 12 can be sealed by setting a sealing gasket.

[0030] The inner screen frame 12 is provided with a vibration frame (defined as a first vibration frame 16), and the finished screen 15 is laid on the first vibration frame 16. The first vibration frame 16 is used to connect an external vibration generator (such as an ultrasonic generator, etc.), and transmit the vibration to the finished screen 15 through the first vibration frame 16; and the first vibration frame 16 also forms a stable support for the finished screen 15. Of course, in other embodiments, the inner screen frame 12 can also be directly provided with a vibration generator to drive the finished screen 15 to vibrate.

[0031] A bottom plate 17 is also fixed to the bottom of the outer screen frame 11 and the inner screen frame 12, and the small particle material screened out by the finished product screen 15 falls onto the bottom plate 17. The inner screen frame 12 or the bottom plate 17 is provided with a final-stage discharge port 121. In this embodiment, the final-stage discharge port 121 is arranged on the inner screen frame 12 for the final-stage material (i.e., the small particle material screened out by the finished product screen 15) falling onto the bottom plate 17 to be discharged, thereby realizing unified collection.

[0032] Furthermore, in this embodiment, the rotary vibrating screen also includes a grading screen module 20 and a top cover 30. The grading screen module 20 is arranged on the upper layer of the finished product screen module 10. Specifically, the grading screen module 20 includes a connecting frame 21, a grading screen 22 and a grading outlet 24. The connecting frame 21 is fixed on the outer screen frame 11 of the finished product screen module 10, and the grading screen 22 is assembled in the connecting frame 21. The grading outlet 24 is arranged on the connecting frame 21 for outputting materials that are not screened out by the grading screen 22; the sieve hole diameter of the grading screen 22 is larger than the sieve hole diameter of the finished product screen 15, and the top cover 30 covers the top of the connecting frame 21 and opens a feed port 31. During operation, the raw material enters the grading screen 22 of the grading screen module 20 from the feed port 31 of the top cover 30. After being screened by the grading screen 22, the finished material that meets the particle size requirements and the final material with small particles will leak out from the grading screen 22 and fall onto the finished product screen 15 of the lower layer, while the large particle material with a larger particle size will be output from the grading outlet 24.

[0033] Specifically, since the raw material falls into the middle area of ​​the grading screen 22 from the feed port 31 of the top cover 30, as the grading screen 22 vibrates and screens, the material gradually moves outward, and the finished material that meets the particle size and the final material of small particles will be screened out before reaching the periphery of the grading screen 22, and therefore will not fall directly into the lower layer of the avoidance gap 101. Alternatively, a blocking structure can be added above the avoidance gap 101 to block it.

[0034] Specifically, a vibration frame (defined as a second vibration frame 23 ) is also provided on the connection frame 21 , the grading screen 22 is laid on the second vibration frame 23 , and the second vibration frame 23 is externally connected to a vibration generator, thereby realizing the vibration operation of the grading screen 22 .

[0035] The structure of adding the grading screen module 20 and the top cover 30 can be used to screen finished products with particle sizes within a certain range. Of course, in other embodiments, if there is no need to screen out large particles in the original materials to be screened or there are no large particles in the original materials, the finished product screen module 10 can also be directly used to achieve screening.

[0036] The rotary vibrating screen provided in the present application can be directly modified on a traditional screen frame, and has a simple structure and is easy to operate.

[0037] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A rotary vibrating screen, characterized in that: It includes a finished product screen module group, which includes an outer screen frame, an inner screen frame, a finished product screen and a finished product discharge port. The inner screen frame is arranged on the inner side of the outer screen frame and is spaced apart from the inner screen frame to form an avoidance gap. The finished product screen is assembled on the inner screen frame. A plurality of groups of inclined discharge channels are arranged in the avoidance gap between the outer screen frame and the inner screen frame, and the bottom of each group of discharge channels is connected to the finished product discharge port.

2. The rotary vibrating screen according to claim 1, characterized in that: A flow channel baffle is arranged in the avoidance gap between the outer screen frame and the inner screen frame, and the discharge flow channel is formed by the flow channel baffle.

3. The rotary vibrating screen according to claim 1 or 2, characterized in that: The avoidance gap between the outer screen frame and the inner screen frame is a circular ring-shaped gap, and a plurality of discharge flow channels are evenly distributed in the circular ring-shaped avoidance gap.

4. The rotary vibrating screen according to claim 1 or 2, characterized in that: Each set of discharge channels is in a "V"-shaped structure, and the finished product discharge port is arranged at the bottom of the "V"-shaped discharge channel.

5. The rotary vibrating screen according to claim 2, characterized in that: The flow channel baffle has a plurality of inclined support plates that are bent reciprocatingly up and down, and two adjacent inclined support plates form a "V"-shaped discharge flow channel, and the finished product discharge port is arranged at the bottom of the "V"-shaped discharge flow channel.

6. The rotary vibrating screen according to claim 2, characterized in that: The outer screen frame and the inner screen frame are fixedly connected via a flow channel baffle.

7. The rotary vibrating screen according to claim 1, characterized in that: A vibration frame is arranged on the inner screen frame, and the finished product screen is laid on the vibration frame.

8. The rotary vibrating screen according to claim 1, characterized in that: A bottom plate is also fixed to the bottom of the outer screen frame and the inner screen frame, and a final-stage discharge port is arranged on the inner screen frame or the bottom plate for the final-stage material falling onto the bottom plate to be discharged.

9. The rotary vibrating screen according to claim 1, characterized in that: The rotary vibrating screen also includes a grading screen module and a top cover. The grading screen module is arranged on the upper layer of the finished product screen module. The grading screen module includes a connecting frame, a grading screen and a grading outlet. The connecting frame is fixed on the outer screen frame of the finished product screen module. The grading screen is assembled in the connecting frame. The grading outlet is arranged on the connecting frame for outputting materials that are not screened out by the grading screen. The sieve hole diameter of the grading screen is larger than the sieve hole diameter of the finished product screen. The top cover covers the top of the connecting frame and is provided with a feed inlet.

10. A method for screening fragile materials, characterized in that: Including the rotary vibrating screen as described in any one of claims 1 to 9 above, the material falls into the finished product screen, and the small particle material is screened out from the finished product screen by vibrating the finished product screen, and the finished product material not screened out by the finished product screen falls into the escape gap through the periphery of the finished product screen, and then flows into the finished product discharge port through each discharge flow channel in the escape gap, and finally is discharged through the finished product discharge port.

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