A composite pressure screen housing structure

Abstract

This utility model relates to the field of pressure screen technology and discloses a composite pressure screen shell structure, including a base plate and a cylinder fixedly installed on the base plate. End flanges are respectively provided at both ends of the cylinder. A pulp outlet pipe, an observation window, a dilution water pipe, an upper screen drum outlet pipe, a flushing pipe, a lower screen drum outlet pipe, and a pulp inlet pipe are sequentially arranged on the side wall of the cylinder. The pulp inlet pipe is used to transport pulp into the cylinder, and the upper and lower screen drum outlet pipes are used to discharge different pulps after screening, respectively. This shell structure, by separately providing upper and lower screen drum outlet pipes on the cylinder, can directly achieve rapid discharge of the "good pulp" and "tail pulp" after screening, eliminating the need for additional tail pulp guide pipes or transfer devices as required by traditional pressure screens. This effectively solves the problem of cumbersome and complex tail pulp processing procedures in traditional equipment.

Description

Technical Field

[0001] This utility model relates to the field of pressure screen technology, specifically a composite pressure screen shell structure. Background Technology

[0002] Pulp screening is a core process in modern papermaking to ensure paper quality and improve fiber utilization. Pressure screens, as key equipment in this process, separate qualified fibers (good pulp) from impurities (such as wood knots, fiber bundles, and dust) in the pulp through the synergistic effect of internal screen drums and pressure differences.

[0003] The tail pulp discharged after screening (containing a high proportion of impurities and incompletely separated short fibers) needs to be screened twice to recover usable fibers. The efficiency and stability of this process directly determine the raw material utilization rate, energy consumption cost and product quality of the entire paper production line.

[0004] The traditional pressure screens currently widely used in the industry have fundamental limitations in their shell structure design, resulting in cumbersome tail pulp processing, complicated operation, inconvenient maintenance, and screening effects that fail to meet the demands of high-efficiency production. This has become a prominent bottleneck restricting paper companies from reducing costs and increasing efficiency.

[0005] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop a composite pressure screen shell structure. Utility Model Content

[0006] The purpose of this invention is to provide a composite pressure screen shell structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A composite pressure screen shell structure includes a base plate and a cylinder fixedly installed on the base plate. End flanges are provided at both ends of the cylinder. A pulp outlet pipe, an observation window, a dilution water pipe, an upper screen drum outlet pipe, a flushing pipe, a lower screen drum outlet pipe, and a pulp inlet pipe are sequentially arranged on the side wall of the cylinder. The pulp inlet pipe is used to transport pulp into the cylinder. The upper and lower screen drum outlet pipes are used to discharge different pulps after screening. The pulp outlet pipe is used to discharge redundant fluid generated during the screening process. The dilution water pipe is used to inject a dilution medium into the cylinder to adjust the pulp concentration. The flushing pipe is used to deliver a flushing medium into the cylinder to clean the inner wall. The observation window is used to observe the screening status inside the cylinder.

[0009] As a preferred technical solution, the end flange and the cylinder are integrally formed, and the end flange is provided with bolt holes for connecting to the equipment, and the bolt holes are evenly distributed along the circumference of the end flange.

[0010] As a preferred technical solution, the observation window is made of transparent, high-temperature resistant tempered glass or polycarbonate material, and a wear-resistant and pulp-corrosion-resistant rubber sealing gasket is provided between the observation window and the side wall of the cylinder.

[0011] As a preferred technical solution, one end of the dilution water pipe penetrates the side wall of the cylinder and extends into the interior of the cylinder, and the other end of the dilution water pipe is provided with a snap-fit ​​quick connector for quick connection to an external water supply pipeline, and the quick connector is provided with a flow control valve.

[0012] As a preferred technical solution, the slurry inlet pipe and the lower screen drum outlet pipe are respectively located in the lower region of the side wall of the cylinder; the inlet end of the slurry inlet pipe is also provided with a filter screen for filtering large particulate impurities.

[0013] As a preferred technical solution, the flushing pipe is fixedly installed on the inner or outer wall of the cylinder along the axial direction of the cylinder, and the flushing pipe has a plurality of flushing holes evenly distributed along the axial direction on its pipe wall; the flushing holes are arranged facing the inner wall of the cylinder, and the diameter of the flushing holes gradually increases from one end of the flushing pipe to the other end.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This shell structure, by separately setting upper and lower screen drum outlet pipes on the cylinder, can directly achieve rapid discharge of the "good pulp" and "tail pulp" after screening, eliminating the need for additional tail pulp guide pipes or transfer devices as required by traditional pressure screens. This effectively solves the problems of cumbersome and complex tail pulp processing procedures in traditional equipment. It significantly improves the separation efficiency of impurities and fibers, increases the recovery rate of usable fibers in the tail pulp, and significantly improves the raw material utilization rate of the papermaking production line. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a composite pressure screen shell structure;

[0016] Figure 2 This is a side view of a composite pressure screen shell structure.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of a composite pressure screen shell.

[0018] In the attached diagram, the following are the reference numerals: 1. Base plate; 2. Cylinder body; 21. End flange; 22. Slurry outlet pipe; 24. Observation window; 25. Dilution water pipe; 26. Upper screen drum outlet pipe; 27. Flushing pipe; 28. Lower screen drum outlet pipe; 29. ​​Slurry inlet pipe. Detailed Implementation

[0019] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a composite pressure screen shell structure technical solution: including a base plate 1 and a cylinder 2 fixedly installed on the base plate 1.

[0021] The cylinder 2 is provided with end flanges 21 at both ends. The end flanges 21 and the cylinder 2 are integrally formed. Bolt holes for connecting with equipment are opened on the end flanges 21. The bolt holes are evenly distributed around the end flanges 21. Bolts are passed through the bolt holes to fix the connection with external equipment.

[0022] The side wall of the cylinder 2 is provided with a slurry outlet pipe 22, an observation window 24, a dilution water pipe 25, an upper screen drum outlet pipe 26, a flushing pipe 27, a lower screen drum outlet pipe 28, and a slurry inlet pipe 29 in sequence.

[0023] The observation window 24 is made of transparent, high-temperature resistant tempered glass or polycarbonate. A wear-resistant and pulp-corrosion-resistant rubber sealing gasket is provided between the observation window 24 and the side wall of the cylinder 2. The rubber sealing gasket achieves a sealed connection between the observation window 24 and the side wall of the cylinder 2.

[0024] One end of the dilution water pipe 25 penetrates the side wall of the cylinder 2 and extends into the interior of the cylinder 2. The other end of the dilution water pipe 25 is provided with a snap-fit ​​quick connector for quick connection to an external water supply line. The quick connector is equipped with a flow control valve. The quick connector is used to quickly connect to the external water supply line, and the flow control valve controls the flow rate of the dilution water pipe.

[0025] The slurry inlet pipe 29 and the lower screen drum outlet pipe 28 are located in the lower part of the side wall of the cylinder 2. The inlet end of the slurry inlet pipe 29 is also equipped with a filter screen for filtering large particulate impurities.

[0026] The flushing pipe 27 is fixedly installed on the inner or outer wall of the cylinder 2 along the axial direction. The flushing pipe 27 has multiple flushing holes evenly distributed along the axial direction on its pipe wall. The flushing holes face the inner wall of the cylinder 2, and the diameter of the flushing holes gradually increases from one end of the flushing pipe 27 to the other end. The flushing pipe 27 is installed on the inner or outer wall of the cylinder 2 by welding or bolt fixing.

[0027] When using this composite pressure screen shell structure, pulp is first fed into the cylinder 2 through the pulp inlet pipe 29, and the filter screen at the inlet end of the pulp inlet pipe 29 will filter out large particulate impurities in the pulp.

[0028] After the pulp enters the cylinder 2, the qualified fibers (good pulp) and impurities (such as wood knots, fiber bundles, and dust) in the pulp are separated by the synergistic effect of the internal screen drum and pressure difference.

[0029] During the screening process, the screening status inside the cylinder 2 can be observed through the observation window 24. The observation window 24 is made of transparent, high-temperature resistant tempered glass or polycarbonate material, and a wear-resistant and pulp-corrosion-resistant rubber sealing gasket is provided between it and the side wall of the cylinder 2 to ensure the clarity and sealing of the observation.

[0030] If it is necessary to adjust the pulp concentration, dilution medium can be injected into the cylinder 2 through the dilution water pipe 25. One end of the dilution water pipe 25 passes through the side wall of the cylinder 2 and extends into the inside of the cylinder 2, while the other end is equipped with a snap-fit ​​quick connector and a flow control valve, which can quickly connect to the external water supply pipeline and control the flow.

[0031] After screening, different pulps are discharged through the upper screen drum outlet pipe 26 and the lower screen drum outlet pipe 28, respectively, realizing the rapid discharge of "good pulp - tailings pulp" by classification.

[0032] The redundant fluid generated during the screening process is discharged through the slurry outlet pipe 22.

[0033] When it is necessary to clean the inside of the cylinder 2, the flushing medium can be delivered into the cylinder 2 through the flushing pipe 27. The flushing pipe 27 is fixedly installed on the inner or outer wall of the cylinder 2 along the axial direction. Multiple flushing holes are evenly distributed along the axial direction and facing the inner wall of the cylinder 2. The diameter of the flushing holes gradually increases from one end to the other, which can achieve effective cleaning of the inner wall of the cylinder 2.

[0034] The working principle and usage process of this utility model: After assembling each component of this solution in sequence, work according to the above implementation methods according to actual needs to complete all working steps.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A composite pressure screen shell structure, characterized in that, The device includes a base plate (1) and a cylinder (2) fixedly installed on the base plate (1). The cylinder (2) has end flanges (21) at both ends. The side wall of the cylinder (2) is provided with a pulp outlet pipe (22), an observation window (24), a dilution water pipe (25), an upper screen drum outlet pipe (26), a flushing pipe (27), a lower screen drum outlet pipe (28), and a pulp inlet pipe (29). The pulp inlet pipe (29) is used to transport pulp into the cylinder (2). The upper screen drum outlet pipe (26) and the lower screen drum outlet pipe (28) are used to discharge different pulps after screening. The pulp outlet pipe (22) is used to discharge redundant fluid generated during the screening process. The dilution water pipe (25) is used to inject dilution medium into the cylinder (2) to adjust the pulp concentration. The flushing pipe (27) is used to transport flushing medium into the cylinder (2) to clean the inner wall. The observation window (24) is used to observe the screening status inside the cylinder (2).

2. The composite pressure screen shell structure according to claim 1, characterized in that: The end flange (21) and the cylinder (2) are integrally formed, and the end flange (21) is provided with bolt holes for connecting with the equipment. The bolt holes are evenly distributed along the circumference of the end flange (21).

3. The composite pressure screen shell structure according to claim 2, characterized in that: The observation window (24) is made of transparent, high-temperature resistant tempered glass or polycarbonate material, and a wear-resistant and pulp-corrosion-resistant rubber sealing gasket is provided between the observation window (24) and the side wall of the cylinder (2).

4. The composite pressure screen shell structure according to claim 3, characterized in that: One end of the dilution water pipe (25) penetrates the side wall of the cylinder (2) and extends into the interior of the cylinder (2). The other end of the dilution water pipe (25) is provided with a snap-fit ​​quick connector for quick connection to an external water supply pipeline, and the quick connector is provided with a flow control valve.

5. The composite pressure screen shell structure according to claim 4, characterized in that: The slurry inlet pipe (29) and the lower screen drum outlet pipe (28) are located in the lower part of the side wall of the cylinder (2); the inlet end of the slurry inlet pipe (29) is also provided with a filter screen for filtering large particulate impurities.

6. The composite pressure screen shell structure according to claim 5, characterized in that: The flushing pipe (27) is fixedly installed on the inner or outer wall of the cylinder (2) along the axial direction, and the flushing pipe (27) has a plurality of flushing holes evenly distributed along the axial direction on its pipe wall; the flushing holes are arranged facing the inner wall of the cylinder (2), and the diameter of the flushing holes gradually increases from one end of the flushing pipe (27) to the other end.

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