Replaceable wear-resistant insert for pulp divider

Abstract

This utility model relates to protective elements for devices designed to distribute and transfer highly abrasive media flows. The replaceable wear-resistant insert for a pulp divider is shaped like a hollow cylinder with a thrust portion at one end and is designed to mate with the inner surface of the pulp outlet and, adjacent to the outlet, the inner surface of the pulp divider or its lining. The objective of this utility model is to develop a replaceable insert for the pulp divider's pulp outlet that provides high protection against abrasive wear, as well as speed and ease of installation, disassembly, and repair. This objective is achieved by improving the performance characteristics of the replaceable wear-resistant insert.

Description

Field of technology

[0001] The utility model relates to protective elements for devices designed to distribute and transfer highly abrasive media flows. As an example, the claimed utility model can be used to protect pulp flow distributors for concentrators for processing gold-bearing ores and fine sands, copper-nickel ores, and so on. Prior Art

[0002] Pulp dividers or feed distributors are designed to distribute highly abrasive fluid mixtures to various industrial devices, including separators such as concentrators and hydrocyclones, various washing, loading, unloading, and other equipment. However, pulp dividers are subject to high wear due to the constant impact of highly abrasive mixtures on their inner surface. To protect them and reduce wear, linings made of various wear-resistant materials are applied to the inside of the dividers and their pulp outlets. Examples of such materials include rubber, ceramics, polyurethane, various composites and compounds, and so on. The lining is most often attached to the dividers through complex and labor-intensive processes, such as bolting, screwing, gluing, or casting onto the inner surface itself and / or the frame on the inner surface.As a result, worn linings also become significantly more difficult and time-consuming to replace or repair, as this requires labor-intensive processes such as unsticking or disconnecting fasteners, recasting, completely disassembling the pulp dividers, and so on. This reduces their maintainability and reduces the equipment utilization factor (EU) of the pulp divider. Furthermore, the pulp outlets and their inlets are subject to the greatest wear, as in these areas, the flow directions change, increasing the intensity of flow collisions with the pulp divider walls and turbulence, as well as flow velocities. Furthermore, the linings for the pulp outlets and the main volume of the pulp divider are often made as a single element or fastened together, which further increases the labor intensity of repairing or replacing the lining of individual pulp outlets. Consequently, the need has arisen for simple and convenient lining elements for pulp divider outlets.

[0003] Jet pulp dividers manufactured by MashProm-Expert are known from the prior art. The manufacturer's website (link: http: / / www.mpoltd.ru / mashiny-i-oborudovanie / strujnyj-pulpodelitel.html - "Jet pulp dividers manufactured by MashProm-Expert", publication date 06.01.2017) also contains an article dedicated to the production of jet pulp dividers, which describes and presents photographs of the production and lining stages of the pulp dividers. These stages also include the formation of a metal frame welded to the inner surface of the pulp divider and polyurethane casting. Moreover, cylindrical hollow elements are used to line the pulp outlets of the pulp divider. This company also lines ZUMPF tanks as indicated on the page “ZUMPF tanks technological production - MashProm-Expert” (link: http: / / www.mpoltd.m / mashiny-i-oborudovanie / emkostnoe-oborudovanie / 100-emkosti-zumpf.html) in which lining elements are used in the form of inserts for outlets from the tank.

[0004] The disadvantages of these analogs include the use of cylindrical elements for lining the pulp outlets. Securely securing them inside the pulp divider requires the use of additional fasteners, adhesive, or casting onto metal frames attached to the inner surfaces of the pulp outlets. This significantly complicates and slows down the process of lining repair or replacement. Without such elements, these lining elements can be displaced or carried away by pulp flows, significantly reducing the effectiveness of the lining. Lining elements in the form of inserts for sumps are also glued or fastened, as the pressure inside the vessel and the flow velocity may not be sufficient to ensure a tight fit, which can lead to their displacement, and the flow directions in different openings may vary.Sump tanks also experience significantly less abrasive wear on their surfaces, including at the outlets, reducing the need for frequent lining replacement. Furthermore, in both cases, the lining is not replaceable and requires a complex and time-consuming repair process.

[0005] An online resource is also known, which describes the lining of feed distributors and their pulp outlets with cast polyurethane by the company "TEKHMASHPOLIMER." The manufacturer's website (https: / / www2.tmpolimer.ru / blog / futero-piping - Lining of pipes, distributors, collectors, bins, published on October 30, 2022) describes the lining of various industrial devices with polyurethane, including pulp dividers and their outlets (pulp outlets).

[0006] The disadvantage of this analogue is that the lining is not replaceable, and its repair requires a repeated process of pouring polyurethane, which reduces its wear resistance, or requires a complete replacement, which significantly complicates the process of its repair and reduces the utilization rate of the pulp divider equipment.

[0007] A technical solution known from the prior art is disclosed on the website of the Siberian Lining Company, a manufacturer of ceramic lining for industrial devices and their components (link: https: / / sfcprotection.ru / produkciya / , publication date: October 7, 2024). This page, as well as the product catalog (link: https: / / sfcprotection.ru / upload / iblock / 6c9 / nzo54qib3vhazx4bfm7lyf7ic1zlzn41 / Katalog.pdf), contain information on lining flow distributors and their outlets with wear-resistant ceramic tiles based on Al2O3, attached with adhesive.

[0008] Another disadvantage of this analogue is that these elements are not replaceable and require a complex and lengthy repair process, including peeling off each damaged tile element.

[0009] The main disadvantages of all the mentioned solutions are the long and complex process of installation, replacement and / or repair of the lining or lining elements of the pulp outlets and their non-replaceability. The essence of the utility model

[0010] The objective of this utility model is to develop a replaceable insert for a pulp divider outlet that provides high protection against abrasive wear, as well as speed and ease of installation, disassembly, and repair. This objective is achieved by achieving the following technical result: protecting the inner surface of the pulp divider outlet(s) and adjacent surfaces from abrasive wear, while allowing for quick and easy installation and replacement of the wear-resistant insert.

[0011] The stated technical result is achieved by means of a replaceable wear-resistant insert for a pulp divider, which has the shape of a hollow cylinder with a thrust part on one of its ends, and is designed with the possibility of mating with the inner surface of the pulp outlet and, adjacent to the pulp outlet, the inner surface of the pulp divider, or their lining.

[0012] A pulp divider consists of a container, usually cylindrical, connected to a common pulp pipeline through a first opening and having several pulp outlets designed as branches for the pulp pipelines leading to other devices, such as concentrators or hydrocyclones. Pulp is a highly abrasive medium, and when combined with high pressures and pulp flow rates, the internal surfaces of the pulp divider and its outlets are subject to severe abrasive wear. To protect them, the internal surfaces of the pulp divider and its outlets are lined with wear-resistant materials such as polyurethane, rubber, ceramics, and so on. This significantly increases the service life of the pulp divider and its components, improves maintainability, and enhances reliability. In this case, the surfaces adjacent to the pulp outlets and the pulp outlets themselves are subject to the greatest wear due to collisions of flows with the edges of the pulp divider, swirling of flows, changes in their directions, and so on.However, the lining itself is subject to wear, requiring periodic replacement or repair, particularly in the pulp outlet areas, as well as the pulp divider itself. The claimed utility model is designed to protect the inner surface of the pulp outlet(s) of the pulp divider and adjacent surfaces from abrasive wear, while allowing for quick and easy installation and replacement.

[0013] The replaceable wear-resistant insert for the pulp divider outlet is a wear-resistant element, its shape matching the inner surface of the outlet and the adjacent surface of the main body of the pulp divider. It is used as a replaceable lining element. Furthermore, this insert can be installed over an existing lining, simplifying its use since it eliminates the need to remove the existing lining of the pulp divider and also increases the reliability of the pulp divider's protection from abrasive wear. The wear-resistant insert itself is shaped like a hollow cylinder and fits tightly into the outlet. On the inner side of the pulp divider, the wear-resistant insert has a thrust portion on its end that covers the surrounding surface adjacent to the outlet.The thrust portion of the wear-resistant insert can be flat or convex, funnel-shaped, truncated conical, or curved to match the curvature of the pulp divider, for example, if it is cylindrical. This allows for a tight fit between the wear-resistant insert and the internal surfaces of the pulp divider and pulp outlet, reducing the risk of tearing, displacement, localized wear, or pulp getting trapped between it and the pulp divider. This design also allows for easy installation in the pulp divider and pulp outlet without the need for additional fasteners, adhesives, or other fasteners. This allows for quick replacement of the insert, should it wear out, separately from the rest of the lining, eliminating labor-intensive processes and methods. Simply remove the worn insert and insert a new one into the pulp outlet opening.All of this contributes to the achievement of a technical result, namely, the protection of the inner surface of the pulp outlet or pulp outlets of the pulp divider and adjacent surfaces from abrasive wear, with the possibility of quick and easy installation and replacement of the wear-resistant insert.

[0014] The thrust portion of the wear-resistant insert is pressed against the surface of the pulp divider, which is essentially perpendicular to the pulp outlet, preventing the wear-resistant insert from falling into the outlet and being carried away by the flow, maintaining its position within the pulp divider. Furthermore, the transition between the cylindrical and thrust portions of the wear-resistant element, on its inner surface, can be smooth and radially curved, eliminating the formation of corners. This significantly reduces the likelihood and intensity of pulp flow turbulence as it moves from the main internal volume of the pulp divider to the pulp outlet or outlets, reducing insert wear and increasing the service life of the pulp divider. Moreover, in this area, the thrust portion of the insert can be thicker than the cylindrical portion, as this area is subject to increased wear, thereby increasing the service life of the entire insert.Closer to the edge, the stop part may, on the contrary, have a smaller thickness, which increases the pressing force from the pulp flows on the replaceable insert, thereby increasing the reliability of maintaining its position.

[0015] The wear-resistant insert is made of polyurethane.

[0016] Additionally, the wear-resistant insert may contain an internal or external reinforcing cage. This may be necessary if the insert lacks sufficient hardness, as is the case with some types of polyurethane or rubber, to increase its rigidity and abrasion resistance. A cage can also be used when using wear-resistant inserts made of metal ceramics. This can further enhance the reliability, ease of installation, and service life of the wear-resistant insert.

[0017] Additionally, the gap between the ends of the pulp outlet and the cylindrical portion of the wear-resistant insert can be lined with a lining layer. For example, this gap can be lined with a wear-resistant compound, including a compound containing ceramic particles, rubber, or polyurethane. These coating materials can be easily separated from the wear-resistant insert when replacing it and do not require a complex and time-consuming application and / or replacement process. Drawing Description

[0018] The subject matter of the present application is described point by point and clearly stated in the claims of the utility model. The above-mentioned objectives, features, and advantages of the utility model are apparent from the following detailed description, taken in conjunction with the accompanying drawings, which show:

[0019] Fig. 1 shows a schematic view of the replaceable wear-resistant insert in three projections and in section.

[0020] Fig. 2 shows a schematic cross-sectional view of replaceable wear-resistant inserts with reinforcing frames.

[0021] Fig. 3 shows a schematic cross-sectional view of replaceable wear-resistant inserts located in the pulp divider.

[0022] These figures are explained by the following positions: Wear-resistant insert - 10; Cylindrical part of the wear-resistant insert - 1; Thrust part of the wear-resistant insert - 2; Reinforcing frame or shell - 3; Pulp divider - 5; Pulp outlet - 6; Pulp divider lining - 7.Detailed description

[0023] The following detailed description of the utility model implementation includes numerous implementation details intended to provide a clear understanding of the present utility model. However, it is obvious to a person skilled in the art how the present utility model can be used, both with and without these implementation details. In other cases, well-known methods, procedures, and components are not described in detail so as not to unnecessarily obscure the features of the present utility model.

[0024] Furthermore, it is clear from the above description that the utility model is not limited to the implementation described. Numerous possible modifications, changes, variations, and substitutions, while preserving the essence and form of the present utility model, are obvious to those skilled in the art.

[0025] The replaceable wear-resistant insert 10 for the pulp divider 5 is a wear-resistant element, the shape of the outer surface of which repeats the shape of the inner surface of the pulp outlet 6 and the adjacent surface of the main volume of the pulp divider 5, or their lining 7, and is used as an element of the replaceable lining. The wear-resistant insert 10 is conditionally divided into two parts, a cylindrical part 1 and a thrust part 2. Its schematic view in three projections and in section is shown in Fig. 1. The cylindrical part 1 has the shape of a hollow cylinder and is inserted into the pulp outlet 6. The thrust part 2 is located on the end of the cylindrical part 1 and is located on the side of the internal volume of the pulp divider 5 and covers the surrounding internal surface of the pulp divider 5 adjacent to the pulp outlet 6.The thrust part 2 of the wear-resistant insert 10 can have a flat or convex shape, the shape of a funnel, a truncated cone, it can also be of a curved shape, repeating the curvature of the pulp divider 5, if, for example, it has a cylindrical shape. Also, the thrust part 2 is pressed against the surface of the pulp divider 5 under the influence of pulp flows and pressures and does not allow the wear-resistant insert 10 to fall inside the pulp outlet 5, maintaining its position inside the pulp divider 5. All this makes it possible to achieve a tight connection of the wear-resistant insert 10 with the lining 7 of the inner surfaces of the pulp divider 5 and the pulp outlet 6, without the formation of gaps and cracks, reducing the likelihood of its tearing off, displacement, local increase in wear, and pulp getting between the insert 10 and the pulp divider 5. A schematic representation of the wear-resistant insert 10, located inside the pulp divider 5 and the pulp outlet 6 is shown in Fig. 3.This design of wear-resistant insert 10 also allows for its installation in pulp divider 5 and pulp outlet 6 without the use of additional fasteners, adhesive, or other fastening materials. Under the influence of pressure and pulp flow, wear-resistant insert 10 is pressed against the inner surfaces of pulp divider 5 and pulp outlet 6, preventing the formation of potential gaps and cracks and maintaining its position. This, in turn, allows for quick replacement of wear-resistant insert 10 separately from the rest of lining 7, eliminating labor-intensive processes and methods such as peeling, cleaning surfaces, applying adhesive, disconnecting fasteners, destroying the insert itself, and so on. Simply remove the worn insert 10 and install a new one into the opening of pulp outlet 6.All of this influences the achievement of the technical result, namely the protection of the inner surface of the pulp outlet or pulp outlets of the pulp divider and the adjacent surfaces from abrasive wear, with the possibility of quick and easy installation and replacement of the wear-resistant insert 10.

[0026] Moreover, this insert 10 can be installed on top of the already existing lining 7, as shown in Fig. 3. This simplifies the use of the replaceable wear-resistant insert 10, since there is no need to remove the already existing lining 7 of the pulp divider 5, and also increases the reliability of the protection of the pulp divider 5 and the pulp outlet 6 from abrasive wear.

[0027] The transition between the cylindrical 1 and thrust 2 portions of the wear-resistant element 10, on the inner surface, may also be smooth and radially curved. This means that the inner surface of the wear-resistant element is smooth and streamlined, maintaining tangential continuity of the surface and avoiding the formation of an angle or angles at the transition from thrust portion 2 to cylindrical portion 1. The radius of curvature of the resulting transition depends solely on the thickness of the thrust 2 and cylindrical 1 portions of the wear-resistant insert 10. This shape of the inner surface of the wear-resistant insert 10 reduces the likelihood and intensity of pulp swirl, smoothly changes its velocity vector, and so on. Furthermore, in this area, thrust portion 2 of the insert 10 may have a greater thickness than cylindrical portion 1, as this area is subject to increased wear, thereby increasing the service life of the entire wear-resistant insert 10.And closer to the edge, the stop part 2 can, on the contrary, have a smaller thickness, which increases the pressing force from the pulp flows on the replaceable insert 10, thereby increasing the reliability of maintaining its position and reducing the likelihood of pulp getting between the insert and the pulp divider 5. Also, in the case where several wear-resistant inserts 10 are used in one pulp divider 5, in which the pulp outlets 6 are at a sufficiently close distance, the stop parts 2 of the replaceable inserts can have a vertical cut, to allow their simultaneous installation without intersections in one pulp divider 5, as shown for example in Fig. 3.

[0028] Wear-resistant insert 10 is made of polyurethane. This material has high wear resistance and can be used as a material for wear-resistant insert 10.

[0029] The wear-resistant insert 10 may also additionally comprise an internal reinforcing frame or shell 3. This may be necessary if the insert 10 lacks sufficient hardness, as is the case with some types of polyurethane, which cannot independently maintain their shape and deform under their own weight. The frame or shell 3 may also be used to increase the rigidity and abrasion resistance of the wear-resistant insert 10. Shell 3 is also used when using wear-resistant inserts 10 made of metal-ceramics. In this case, shell 3 serves as an outer layer to which a solid ceramic element or ceramic elements are bonded, as this can increase their strength and reduce the likelihood of cracking or chipping. This can also further enhance the reliability, ease of installation, and service life of the wear-resistant insert 10.A schematic cross-sectional view of wear-resistant inserts 10 with internal and external reinforcing frames 3 is shown in Fig. 2.

[0030] Additionally, the gap between the ends of the pulp outlet 6 and the cylindrical portion 1 of the wear-resistant insert 10 can be coated with a lining layer for additional protection against chipping, separation of the wear-resistant insert 10 from the pulp outlet 6, and protection of the pulp outlet 6 itself from abrasive wear in this area. For example, this gap can be coated with a wear-resistant compound, including a compound containing ceramic particles, rubber, or polyurethane. These coating materials can be easily separated from the wear-resistant insert 10 when it is replaced and do not require a complex and time-consuming application and / or replacement process.

[0031] Thus, the device of replaceable wear-resistant insert for pulp divider provides protection of the inner surface of the pulp outlet or pulp outlets of the pulp divider and the adjacent surfaces from abrasive wear, with the possibility of quick and easy installation and replacement of the wear-resistant insert.

[0032] These application materials present a preferred disclosure of the implementation of the claimed technical solution, which should not be used as limiting other, particular embodiments of its implementation that do not go beyond the scope of the requested scope of legal protection and are obvious to specialists in the relevant field of technology.

Claims

1. A replaceable wear-resistant insert for the pulp outlet of a pulp divider, having the shape of a hollow cylinder with a thrust portion at one of its ends, designed with the possibility of mating with the inner surface of the pulp outlet and the inner surface of the pulp divider adjacent to the pulp outlet, wherein the wear-resistant insert is made of polyurethane.

2. A replaceable wear-resistant insert according to paragraph 1, characterized in that the wear-resistant insert contains a reinforcing frame or shell.

3. A replaceable wear-resistant insert according to paragraph 1, characterized in that the gap between the end of the cylindrical part of the wear-resistant insert and the end of the pulp outlet is additionally covered with a lining layer.

4. A replaceable wear-resistant insert according to paragraph 3, characterized in that the joint between the end of the cylindrical part of the wear-resistant insert and the end of the pulp outlet is covered with a wear-resistant compound, rubber or polyurethane.

5. A replaceable wear-resistant insert according to paragraph 1, characterized in that the transition between the cylindrical and thrust parts of the wear-resistant insert on the side of its inner surface is made smooth and radially curved.

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