Steady flow type roller press intermediate bin

Abstract

The utility model provides a steady flow type roller press middle bin, a lower cone hopper at the bottom of a bin body is an inverted square cone hopper, an inner cone hopper is further sleeved in the bin body of the middle bin, the height of the inner cone hopper is larger than that of the inverted square cone hopper, and the top of the inner cone hopper is located above the top of the inverted square cone hopper and below a discharging port of the middle bin. The outer side of the inner conical hopper is connected with the inner wall of the bin body and the inner wall of the inverted square conical hopper through a mounting bracket; the diameter of the top round opening of the inner conical hopper is smaller than the distance between the corresponding inner walls of the bin body and larger than the diameter of the discharging opening of the middle bin; the diameter of a bottom hopper hole of the inner conical hopper is not smaller than the distance between bottom hopper holes of the inverted square conical hopper. According to the technical scheme, the inner conical hopper is arranged in the existing inverted square conical hopper of the middle bin in the sleeved mode, the inner conical hopper without an included angle is in butt joint with the discharging opening of the middle bin to feed materials to the roller press, the existing roller press can be technically improved with low cost, and the problem that equipment is damaged due to material punching and collapsing caused by material attachment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of roller presses, in particular to an intermediate bin of a steady-flow roller press. Background Art

[0002] Roller press, also known as extrusion mill or roller mill, is a new type of cement energy-saving grinding equipment developed in the mid-1980s. It can replace the high-energy-consuming and low-efficiency ball mill pre-grinding system and reduce steel consumption and noise. It is suitable for new plant construction and can also be used for technical transformation of old plants, increasing the output of ball mill system by 30-50%. After extrusion, 0.08mm fine particles account for 20-35% of the material cake, and less than 2mm accounts for 65-85%. The internal structure of small particles is full of many tiny cracks due to extrusion, and the grindability is greatly improved. The roller surface adopts hot surfacing, and the wear-resistant layer is more convenient to repair.

[0003] In order to make the roller press work stably for a long time, it is necessary to continuously add materials into the roller press. Large roller presses are usually equipped with an intermediate bin (or a stable bin, a weighing bin), especially for roller press systems used in the cement industry. The intermediate bin has the functions of ensuring stable and uniform material discharge, temporary storage of materials, and material weighing. During the process of storing and adding materials in the intermediate bin, the materials are easy to stick to the wall due to factors such as high moisture content, a large amount of fine powder, and a larger angle of repose of the materials. Moreover, the lower end of the intermediate bin is designed as an integrated hopper, which is mostly matched with a hollow inverted square cone-shaped cone hopper in the middle. The angle is easy to accumulate materials, and the materials stay in the bin for a long time, which aggravates the agglomeration and wall adhesion of materials. Therefore, it is easy for the materials at the discharge port to be hollow and a large amount of materials to adhere to the side wall of the silo. This is easy to cause material impact and collapse, resulting in the roller press suddenly stopping or violently jumping during operation, which has a great harm to the roller press and subsequent equipment, affecting the stable operation of the production system and the service life of the equipment. Utility Model Content

[0004] In order to better solve the above problems, the utility model provides an intermediate bin of a steady-flow roller press. An inner cone bucket is set in the existing inverted square cone bucket in the intermediate bin, and the inner cone bucket without an angle is connected to the discharge port of the intermediate bin to feed materials to the roller press. The existing roller press can be technically modified at a relatively low cost to solve the problem of equipment damage caused by material adhesion and material collapse.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides an intermediate bin of a steady flow type roller press, in which the lower cone bucket at the bottom of the bin body is an inverted square cone bucket, characterized in that an inner cone bucket is also provided in the bin body of the intermediate bin, and the height of the inner cone bucket is greater than the height of the inverted square cone bucket, so that the top of the inner cone bucket is located above the top of the inverted square cone bucket and below the discharge port of the intermediate bin, and the outer side of the inner cone bucket is connected to the inner wall of the bin body and the inner wall of the inverted square cone bucket through an installation bracket; the diameter of the circular opening at the top of the inner cone bucket is smaller than the spacing of the corresponding inner walls of the bin body, and is greater than the diameter of the discharge port of the intermediate bin; the diameter of the bottom bucket hole of the inner cone bucket is not less than the bottom bucket hole spacing of the inverted square cone bucket.

[0006] Optionally, the taper of the inner cone bucket is 1:3.

[0007] Optionally, the angle between the conical surface of the inner conical bucket and the horizontal is 70°.

[0008] Optionally, the inner wall of the inner cone bucket has a wear-resistant layer.

[0009] Optionally, the inner cone bucket is made of a wear-resistant steel plate with a thickness of not less than 10 mm.

[0010] Optionally, the mounting bracket includes a plurality of annular mounting plates welded to the inner wall of the intermediate bin and the inner wall of the inverted square cone bucket, and the inner diameters of the plurality of annular mounting plates are respectively the same as the outer diameters of the inner cone buckets of corresponding heights.

[0011] The intermediate bin of the steady-flow roller press of the embodiment of the utility model is configured with an inner cone bucket sleeved in the existing inverted square cone bucket of the intermediate bin, and the inner cone bucket without an angle is connected with the discharge port of the intermediate bin to feed the material to the roller press, so that the material can slide down smoothly, and no material is attached to the inner wall of the discharge port during the feeding process, thereby avoiding the phenomenon of hollow material at the discharge port and the phenomenon of material rushing and collapse during the discharge process, thereby ensuring the stability of the production system and extending the service life of the roller press and subsequent equipment.

[0012] Compared with other intermediate bins of other structures in the prior art that can solve the problem of material adhesion, the steady-flow type roller press intermediate bin is more suitable for the transformation of the existing roller press intermediate bin. There is no need to improve the equipment structure of the roller press and its unloading equipment, subsequent equipment, etc. The transformation can be completed by simply installing an inner cone bucket in the hopper of the existing roller press intermediate bin. The problem of equipment damage caused by material adhesion and material collapse can be solved at a relatively low equipment transformation cost. It can be accepted by cement manufacturers and help promote more cement manufacturers to achieve technical transformation of their grinding production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural view of the intermediate bin of the constant flow type roller press according to the embodiment of the present invention;

[0015] Figure 2 It is a top view of the intermediate bin of the constant flow type roller press according to the embodiment of the present invention.

[0016] Reference numerals:

[0017] 1. Bin body; 2. Feeding port; 3. Inverted square cone hopper; 4. Inner conical hopper; 5. Ring-shaped mounting plate. Detailed implementation manners

[0018] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the matrix implementation disclosed below.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0020] As Figure 1 and Figure 2 shown, in the intermediate bin of the constant flow type roller press according to the embodiment of the present invention, the feeding hopper at the bottom of the bin body 1 is an inverted square cone hopper 3. An inner conical hopper 4 is also sleeved in the bin body 1. The height of the inner conical hopper 4 is greater than the height of the inverted square cone hopper 3, so that the top of the inner conical hopper 4 is above the top of the inverted square cone hopper 3 and below the feeding port 2 of the intermediate bin. The outer side of the inner conical hopper 4 is connected to the inner wall of the bin body 1 and the inner wall of the inverted square cone hopper 3 through a mounting bracket; the diameter of the circular opening at the top of the inner conical hopper 4 is smaller than the distance between the corresponding inner walls of the bin body 1 and larger than the diameter of the feeding port 2 of the intermediate bin; the diameter of the bottom hole of the inner conical hopper 4 is not less than the bottom hole spacing of the inverted square cone hopper 3.

[0021] In the intermediate bin of the steady-flow type roller press according to the embodiment of the present utility model, the inner conical hopper 4 is sleeved inside the outer inverted square conical hopper 3. The top of the inner conical hopper 4 is higher than the top of the inverted square conical hopper 3 and is connected to the inner wall of the intermediate bin through a mounting bracket; the middle and lower part is located inside the inverted square conical hopper 3 and is connected to the inner wall of the inverted square conical hopper 3 through a mounting bracket. Here, the mounting bracket may include a plurality of annular mounting plates 5 welded to the inner wall of the lower part of the intermediate bin and the inner wall of the inverted square conical hopper. The inner diameters of the plurality of annular mounting plates 5 are respectively the same as the outer diameters of the inner conical hopper 4 at corresponding heights, and the inner conical hopper is fixed and supported by the plurality of annular mounting plates 5. The diameter of the bottom hopper hole of the inner conical hopper 4 is greater than or equal to the distance between the bottom hopper holes of the inverted square conical hopper 3 (the distance between two corresponding sides of the square hopper hole). The bottom hopper hole of the inner conical hopper can abut against the inner side of the bottom hopper hole of the inverted square conical hopper or partially protrude. In this way, the inner conical hopper 4 can be fixedly installed in the inverted square conical hopper 3. Of course, the abutting part between the bottom hopper hole of the inner conical hopper and the bottom hopper hole of the inverted square conical hopper can also be welded and fixed.

[0022] During the use of the intermediate bin of the steady-flow type roller press, the material is fed from the feeding port 2 of the intermediate bin into the inner conical hopper 4. The material slides downward along the non-angled inclined conical surface of the inner conical hopper 4 and flows to the roller press through the bottom hopper hole. This inner conical hopper can greatly reduce the amount of material adhering to the bin wall. Even if there is some adhered material, it will slide to the bottom hopper hole under the heavy pressure of the upper material during the feeding process, thus avoiding the phenomenon of material hollowing at the feeding place and the phenomena of material flushing and material collapse during the feeding process.

[0023] In an optional embodiment, the taper of the inner conical hopper 4 is 1:3, and the angle between the conical surface and the horizontal is 70°. Through multiple practices, it is found that this taper and angle can enable the material to slide smoothly on the inclined inner wall of the inner conical hopper and solve the problem of material adhesion. Further, the inner wall of the inner conical hopper 4 has a wear-resistant layer. Specifically, this wear-resistant layer can adopt an alloy wear-resistant layer with a certain amount of metallic chromium, which has certain anti-sticking property, wear resistance, and impact resistance. It can not only withstand the impact and wear brought by the high feeding drop but also play an anti-sticking role for the material, thereby further solving the problem of material adhesion. Of course, in actual applications, the inner conical hopper 4 can be made of wear-resistant steel plate with an alloy wear-resistant layer inside, and its thickness is not less than 10 mm.

[0024] According to the exemplary embodiment of the present utility model, the intermediate bin of the steady-flow type roller press can be implemented by transforming the existing intermediate bin of the roller press. Specifically, it is realized by adding an inner conical hopper in the existing bottom inverted square conical hopper of the roller press intermediate bin. The size of the inner conical hopper is designed according to the sizes of the existing intermediate bin, inverted square conical hopper, and feeding port, and it can be welded and installed through the corresponding mounting brackets.

[0025] It should be noted that according to the needs of implementation, each component described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0026] The above embodiments only express several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A steady flow roller press intermediate bin, the lower cone bucket at the bottom of the bin body is an inverted square cone bucket, characterized in that: An inner cone bucket is also sleeved in the warehouse body of the intermediate warehouse, and the height of the inner cone bucket is greater than that of the inverted square cone bucket, so that the top of the inner cone bucket is located above the top of the inverted square cone bucket and below the discharge port of the intermediate warehouse, and the outer side of the inner cone bucket is connected to the inner wall of the warehouse body and the inner wall of the inverted square cone bucket through a mounting bracket; the diameter of the circular opening at the top of the inner cone bucket is smaller than the spacing of the corresponding inner walls of the warehouse body and larger than the diameter of the discharge port of the intermediate warehouse; the diameter of the bottom bucket hole of the inner cone bucket is not less than the bottom bucket hole spacing of the inverted square cone bucket.

2. The intermediate bin of a steady flow roller press according to claim 1, characterized in that: The taper of the inner cone bucket is 1:

3.

3. The intermediate bin of a steady flow roller press according to claim 1, characterized in that: The angle between the conical surface of the inner conical bucket and the horizontal is 70°.

4. The intermediate bin of a steady flow roller press according to claim 1, characterized in that: The inner wall of the inner cone bucket is provided with a wear-resistant layer.

5. The intermediate bin of a steady flow roller press according to claim 1, characterized in that: The inner cone bucket is made of a wear-resistant steel plate with a thickness of not less than 10 mm.

6. A steady flow roller press intermediate bin according to any one of claims 1-5, characterized in that: The mounting bracket comprises a plurality of annular mounting plates welded on the inner wall of the intermediate bin and the inner wall of the inverted square cone bucket, and the inner diameters of the plurality of annular mounting plates are respectively the same as the outer diameters of the inner cone buckets of corresponding heights.

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