Medium-concentration paper pulp pump convenient to repair and maintain

Abstract

The utility model belongs to the technical field of paper pulp pumps, and particularly relates to a medium-concentration paper pulp pump convenient to maintain, which comprises a front lining assembly, a pump body, a turbulence generator, an impeller, a rear pump cover, a pump shaft, a pulp blocking gland, a pulp blocking plate, a mechanical seal, a suspension and a bearing, the impeller is installed in the middle of the output end of the pump shaft, the turbulence generator is installed at the extending end of the pump shaft and located in the front lining assembly, a wear-resistant front lining can be conveniently replaced, a pipeline and the pump body do not need to be disassembled, the maintenance time and the maintenance cost are greatly reduced, the maintenance efficiency is improved, and remarkable economic benefits are achieved. The inner diameter of the front lining is gradually reduced from the pulp inlet to the pump body, so that the pulp can be slowly accelerated in the feeding process, the improvement of the equipment performance is facilitated, in addition, the front lining can be replaced according to the actual production requirement, and the universality of the medium-concentration pulp pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pulp pumps, in particular to a medium consistency pulp pump which is convenient for maintenance and repair. Background Art

[0002] The medium consistency pulp pump is a kind of machinery widely used in the paper-making industry, mainly used to pump pulp. The existing pulp pump design adopts a semi-open impeller, and the hydraulic design of the pump is carried out by using the principle of "relative suction and relative blockage" in the two-phase flow theory, so that the hydraulic performance of the pump's flow-through components conforms to the law of solid-liquid two-phase flow, thereby reducing the erosion and wear of the slurry on the flow-through components, and greatly improving the working efficiency and service life of the pump. However, the erosion and wear of the slurry caused by the movement between the impeller blades and the front pump body are far more than those of the slurry on the impeller itself. Therefore, in patent CN108757480A, the front lining of the pump body and the pump body are designed as two parts, making the easily worn parts easy to replace. However, in addition to the part of the front lining of the pump body that is easily eroded and worn by the impeller, there is also a part that is not easily worn, such a structure is likely to cause a large amount of material waste, with a high cost, affecting the production process and causing great economic losses to the enterprise.

[0003] Therefore, this application proposes a medium consistency pulp pump which is convenient for maintenance and repair. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the above and / or existing problems in the medium consistency pulp pump which is convenient for maintenance and repair, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a medium consistency pulp pump which is convenient for maintenance and repair. The medium consistency pulp pump adopts a separated structure design, which can conveniently replace the wear-resistant front lining without disassembling the pipeline and the pump body, greatly reducing the maintenance time and repair cost, improving the repair efficiency, and having significant economic benefits; the inner diameter of the front lining gradually decreases from the slurry inlet to the pump body direction, which can make the slurry get a gentle speed increase during the feeding process, contributing to the improvement of the equipment performance. In addition, the front lining can be replaced according to the actual production requirements, improving the versatility of the medium consistency pulp pump.

[0007] To solve the above technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

[0008] A medium consistency pulp pump facilitating maintenance, comprising: a front lining assembly, a pump body, a turbulence generator, an impeller, a rear pump cover, a pump shaft, a slurry retaining gland, a slurry retaining plate, a mechanical seal, a suspension and a bearing. The front lining assembly and the rear pump cover are installed at both ends of the pump body. An impeller is installed in the middle of the output end of the pump shaft. A turbulence generator is installed at the extending end of the pump shaft. The turbulence generator is located within the front lining assembly. A slurry retaining gland and a slurry retaining plate are sequentially arranged between the impeller and the rear pump cover. The slurry retaining gland is connected to the rear pump cover by screws. The slurry retaining plate is installed on the pump shaft. The part of the pump shaft extending out of the pump body is supported by the bearing within the suspension. The bearing is located within the suspension. The suspension is connected to the rear pump cover by bolts.

[0009] As a preferred solution of the medium consistency pulp pump facilitating maintenance according to the present utility model, wherein: the front lining assembly adopts a rotary body structure.

[0010] As a preferred solution of the medium consistency pulp pump facilitating maintenance according to the present utility model, wherein: the impeller adopts a semi-open centrifugal impeller. The main blade structure of the impeller combines straight blades at the inlet section and cylindrical blades at the outlet section. Its back blades adopt straight blades, and their centerlines point to the center. Gas-liquid separation holes are provided on the middle cover plate, and the number thereof is the same as that of the main blades and the back blades.

[0011] Compared with the prior art: the medium consistency pulp pump adopts a separated structure design, which can conveniently replace the wear-resistant front lining without disassembling the pipeline and the pump body, greatly reducing the maintenance time and maintenance cost, improving the maintenance efficiency, and having significant economic benefits. The inner diameter of the front lining gradually decreases from the slurry inlet towards the pump body direction, which can make the slurry obtain a gentle speed increase during the feeding process, contributing to the improvement of the equipment performance. In addition, the front lining can be replaced according to the actual production requirements, improving the versatility of the medium consistency pulp pump. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0013] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0014] Figure 2 is a schematic diagram of the traditional front lining structure;

[0015] Figure 3 is a schematic diagram of the front lining assembly structure of the present utility model.

[0016] In the figure: 1 front lining assembly, 2 pump body, 3 turbulence generator, 4 impeller, 5 rear pump cover, 6 pump shaft, 7 slurry baffle gland, 8 slurry baffle, 9 mechanical seal, 10 suspension, 11 bearing, 100 traditional front lining structure, 101 wear-resistant section of the front lining assembly, 102 easily worn section of the front lining assembly, 103 sealing ring. Specific embodiments

[0017] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0018] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0019] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0020] In order to make the purpose, technical solution and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] The present utility model provides a medium consistency pulp pump that is convenient for maintenance. The medium consistency pulp pump adopts a separated structure design, which can conveniently replace the wear-resistant front lining without disassembling the pipeline and the pump body, greatly reducing the maintenance time and maintenance cost, improving the maintenance efficiency, and having significant economic benefits; the inner diameter of the front lining gradually decreases from the slurry inlet towards the pump body direction, which can make the slurry get a gentle speed increase during the feeding process, contributing to the improvement of the equipment performance. In addition, the front lining can be replaced according to the actual production requirements, improving the versatility of the medium consistency pulp pump. Please refer to Figures 1 - 3 , including: front lining assembly 1, pump body 2, turbulence generator 3, impeller 4, rear pump cover 5, pump shaft 6, slurry baffle gland 7, slurry baffle 8, mechanical seal 9, suspension 10 and bearing 11;

[0022] The front lining assembly 1 and the rear pump cover 5 are installed at both ends of the pump body 2. An impeller 4 is installed in the middle of the output end of the pump shaft 6. A turbulence generator 3 is installed at the extending end of the pump shaft 6. The turbulence generator 3 is located inside the front lining assembly 1. A slurry baffle gland 7 and a slurry baffle 8 are sequentially arranged between the impeller 4 and the rear pump cover 5. The slurry baffle gland 7 is connected to the rear pump cover 5 by screws. The slurry baffle 8 is installed on the pump shaft 6. The part of the pump shaft 6 extending out of the pump body 2 is supported by a bearing 11 inside a suspension 10. The bearing 11 is located inside the suspension 10. The suspension 10 is connected to the rear pump cover 5 by bolts.

[0023] The front lining assembly 1 adopts a rotary body structure. Compared with the traditional front lining 100 structure, it is divided into two parts. The wear-resistant section 101 of the front lining assembly and the slurry inlet pipe use a flange structure and are connected by bolts. The easily worn section 102 of the front lining assembly is connected to the pump body by bolts. The demarcation position between the wear-resistant section 101 and the easily worn section 102 of the front lining assembly is located at the position of the sudden change in the diameter of the turbulence generator 3. The two use a flange structure and are connected by bolts. An annular groove for installing a sealing ring 103 is provided on the connecting end face at the positions of the easily worn section and the wear-resistant section.

[0024] The impeller 4 adopts a semi-open centrifugal impeller. The main blade structure of the impeller 4 combines straight blades at the inlet section and cylindrical blades at the outlet section. Its back blades adopt straight blades, and their centerlines point to the center. The middle cover plate is provided with gas-liquid separation holes, and the number of them is the same as that of the main blades and the back blades, which is 6 or 8.

[0025] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The reason for not exhaustively describing the situations of these combinations in this specification is only to save space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A medium-consistency pulp pump that is easy to repair and maintain, characterized in that: include: A front liner assembly (1), a pump body (2), a turbulence generator (3), an impeller (4), a rear pump cover (5), a pump shaft (6), a slurry retaining cover (7), a slurry retaining plate (8), a mechanical seal (9), a suspension (10) and a bearing (11), wherein the front liner assembly (1) and the rear pump cover (5) are mounted at both ends of the pump body (2), an impeller (4) is mounted in the middle of the output end of the pump shaft (6), a turbulence generator (3) is mounted at the protruding end of the pump shaft (6), and the turbulence generator (3) is positioned at the In the front liner assembly (1), a slurry pressure cover (7) and a slurry protection plate (8) are sequentially arranged between the impeller (4) and the rear pump cover (5); the slurry pressure cover (7) is connected to the rear pump cover (5) by screws; the slurry protection plate (8) is installed on the pump shaft (6); the part of the pump shaft (6) extending out of the pump body (2) is supported in the suspension (10) by a bearing (11); the bearing (11) is located in the suspension (10); and the suspension (10) is connected to the rear pump cover (5) by bolts.

2. The medium-consistency pulp pump that is easy to repair and maintain according to claim 1, characterized in that: The front lining assembly (1) adopts a rotating body structure.

3. The medium-consistency pulp pump that is easy to repair and maintain according to claim 1, characterized in that: The impeller (4) is a semi-open centrifugal impeller. The main blade structure of the impeller (4) is a combination of straight blades at the inlet section and cylindrical blades at the outlet section. The back blades are straight blades with their center lines pointing to the center. The middle cover plate is provided with gas-liquid separation holes, the number of which is the same as that of the main blades and the back blades.

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