Disc structure of multi-disc thickener

Abstract

The utility model relates to the technical field of slurry concentration, in particular to a disc structure of a multi-disc concentrator, which comprises a hollow main shaft, a sealing belt and a plurality of sector plates, and the sector plates are arranged along the circumference of the hollow main shaft and are connected with the hollow main shaft through the sealing belt; an annular groove communicating with the interior of the hollow main shaft is formed in the outer side wall of the hollow main shaft in the circumferential direction. The sealing belt is connected to the annular groove in a sleeving manner; a counter bore is formed in the bottom of the fan-shaped plate, a screw is arranged in the counter bore, and the screw penetrates through the sealing belt and is in threaded connection with the bottom wall of the annular groove; and the fan-shaped plate can press the sealing tape tightly by screwing the screw, so that the hollow main shaft is connected in a sealing manner. The utility model can solve the problem that the connection part of the disc and the hollow main shaft and the sealing belt area are easy to wear and leak.

Description

Technical Field

[0001] This utility model relates to the field of slurry concentration technology, specifically to a disc structure of a multi-disc thickener. Background Technology

[0002] The multi-disc thickener is a solid-liquid separation device widely used in the paper, chemical, and food industries. Its core structure includes discs, a hollow main shaft, a filtrate distribution valve, and a slurry tank. The discs are composed of multiple sector-shaped plates covered with filter screens to filter the liquid components in the slurry. The hollow main shaft serves as the filtrate flow channel, collecting and discharging the filtrate through its connection with the cavities of the sector plates.

[0003] In existing technologies, such as Figure 5 As shown, significant technical defects exist at the connection between the disc and the hollow spindle (area B, the sector plate fixing bolt) and in the sealing strip area C. Specifically, the sector plate fixing bolt area is subjected to long-term vibration and slurry impact, leading to bolt loosening and wear, which in turn causes instability in the disc structure. Furthermore, the sealing strip is prone to aging and deformation under long-term friction and slurry impact, causing filtrate leakage or fiber entry into the turbid filtrate zone, affecting filtration efficiency and filtrate quality. These problems not only reduce equipment operating efficiency but also increase maintenance costs and downtime. Existing solutions mostly alleviate these issues by replacing the sealing strip or adding lubrication measures, but fail to fundamentally solve the wear and leakage problems caused by unreasonable structural design. Therefore, it is urgent to optimize the sealing design of the disc structure to improve equipment stability and service life. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a disc structure for a multi-disc concentrator to solve the problem of easy wear and leakage at the connection between the discs and the hollow main shaft and the sealing strip area.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A disc structure for a multi-disc concentrator includes a hollow main shaft, a sealing strip, and multiple sector plates. The sector plates are arranged circumferentially along the hollow main shaft and connected to it via the sealing strip. An annular groove communicating with the interior of the hollow main shaft is formed on the outer wall of the hollow main shaft. The sealing strip is fitted onto the annular groove. A countersunk hole is formed at the bottom of each sector plate, and a screw is installed within the countersunk hole. The screw passes through the sealing strip and is threaded to the bottom wall of the annular groove. By tightening the screw, the sector plate presses against the sealing strip, thereby sealing the connection to the hollow main shaft.

[0007] As a further improvement of this utility model, the cross-section of the annular groove is trapezoidal.

[0008] As a further embodiment of this utility model: wherein the sealing strip is submerged in the annular groove and the screw is submerged in the countersunk hole.

[0009] As a further embodiment of this utility model: two sealing strips are provided, and the two sealing strips are respectively disposed on both sides of the fan-shaped plate. The outer side and bottom side of the sealing strip abut against the inner side wall and inner bottom wall of the annular groove, respectively.

[0010] As a further improvement of this utility model: pressure plates are provided on both sides of the bottom of the fan-shaped plate, and countersunk holes are provided at both ends of the pressure plates. Tightening the screws can cause the two pressure plates to press the two sealing strips together.

[0011] As a further embodiment of this utility model: the pressure plate is embedded in the outer surface of the sealing strip, and the surface of the pressure plate is coated with a wear-resistant layer.

[0012] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0013] This embodiment provides a disc structure for a multi-disc thickener. By placing the screws inside the countersunk holes, the direct impact and wear of the slurry on the screws can be reduced, preventing slurry accumulation and corrosion. At the same time, placing the sealing strip inside the annular groove can reduce the friction and impact of the slurry on the connection between the sealing strip and the hollow main shaft. The combination of these two methods can effectively prevent filtrate leakage caused by wear at the connection between the sealing strip and the fan-shaped plate and the hollow main shaft, thereby improving the filtrate quality and the stability of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a perspective view of the disc structure of the multi-disc concentrator described in an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Exploded view of the disc structure of the multi-disc concentrator described in the embodiment;

[0017] Figure 3 for Figure 1 A three-dimensional sectional view of the disc structure of the multi-disc concentrator described in the embodiment;

[0018] Figure 4 for Figure 3Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the front structure of the discs in an existing multi-disc concentrator.

[0020] The correspondence between the labels and component names in the attached figures is as follows:

[0021] 1. Hollow spindle; 11. Annular groove; 12. Through hole; 2. Sealing strip; 21. Mounting groove; 3. Sector plate; 31. Pressure plate; 32. Countersunk hole; 4. Screw. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the following description is to be considered exemplary in nature and not restrictive.

[0023] Please refer to Figure 1-5 In one embodiment of the disc structure of a multi-disc thickener provided by this utility model, the disc structure of the multi-disc thickener includes a hollow main shaft 1, a sealing strip 2, and multiple sector plates 3. The multiple sector plates 3 are arranged circumferentially around the hollow main shaft 1 with the center of the hollow main shaft 1, and are connected to the hollow main shaft 1 by the sealing strip 2, thereby forming a disc-shaped disc. When the hollow main shaft 1 rotates, the sector plates 3 on the disc are immersed in the slurry under atmospheric pressure. The slurry is separated by the filter medium. A vacuum is gradually formed inside the water leg. At this time, the slurry layer adsorbed on the surface of the sector plates 3 is relatively thin, and a large amount of fine fibers and filler solids still remain in the filtered filtrate. This part of the filtrate has a relatively high concentration and is called turbid filtrate. As the sector plate 3 continues to rotate, the slurry layer on it gradually thickens. At this point, the slurry layer itself acts as a good filter medium, trapping a large number of fine solids, and the quality of the filtrate gradually improves. The filtrate in this area is called clear filtrate. As the sector plate 3 rotates, the slurry layer thickens. When the sector plate 3 rotates out of the liquid surface, it continues to dehydrate under vacuum, further increasing the dryness of the slurry layer. It then enters the atmospheric zone. When the stripping water peels off the edge of the sector plate 3, the slurry layer forms a self-roll under its own gravity and falls into the slurry tank. It is then conveyed into the slurry pool by a screw conveyor. The sector plate 3 with the stripped slurry layer rotates into the screen washing area, where it is washed and enters the next filtration cycle. The hollow main shaft 1 serves as the flow channel for the filtrate in the multi-disc thickener, connecting with the cavity of the sector plate 3 on the disc. The filtered filtrate enters the hollow main shaft 1 along the cavity formed by the sector plate 3 and the filter screen, collects at the filtrate distribution valve, and then flows to the filtrate pool through the outlet of the distribution valve. The above describes the conventional design and working principle of existing multi-disc concentrator disc structures.

[0024] Importantly, the outer wall of the hollow spindle 1 has an annular groove 11 circumferentially formed, connecting to the interior of the hollow spindle 1. The cross-section of the annular groove 11 is an isosceles trapezoid to increase the contact area. The bottom wall of the annular groove 11 has multiple through holes 12 circumferentially formed, each corresponding to a sector plate 3. These through holes 12 connect to the interior of the corresponding sector plate 3. Two sealing strips 2 are provided, respectively located on both sides of the sector plate 3 and coaxially sleeved on the annular groove 11. The sealing strips 2 are preferably completely submerged in the annular groove 11. Pressure plates 31 are welded to both sides of the bottom of the sector plate 3. Countersunk holes 32 are formed at both ends of the pressure plates 31. Screws 4 are installed in the countersunk holes 32, and the heads of the screws 4 are preferably completely submerged in the countersunk holes 32. The shank of the screw 4 passes through the sealing strip 2 and is threadedly connected to the bottom wall of the annular groove 11. Tightening screw 4 will cause pressure plate 31 to press the sealing strip 2, and at the same time, the outer side and bottom side of sealing strip 2 will abut against the inner side wall and inner bottom wall of annular groove 11 respectively, thereby sealing and connecting sector plate 3 and hollow spindle 1.

[0025] In this embodiment, since the screw 4 is set in the countersunk hole 32, the direct impact and wear of the slurry on the screw 4 can be reduced, preventing the slurry from accumulating and corroding. At the same time, the sealing strip 2 is located in the annular groove 11, which can reduce the friction and impact of the slurry on the connection between the sealing strip 2 and the hollow spindle 1. The combination of the two can effectively prevent the filtrate from leaking due to wear at the connection between the sealing strip 2 and the fan-shaped plate 3 and the hollow spindle 1.

[0026] As a preferred embodiment, the outer surface of the sealing strip 2 is provided with an installation groove 21, the pressure plate 31 is embedded in the installation groove 21, and the surface of the pressure plate 31 is coated with a wear-resistant layer, which is a polyurethane or ceramic coating, which can reduce the impact and wear of the slurry on the pressure plate 31, thereby further preventing wear at the connection between the sealing strip 2 and the fan-shaped plate 3.

[0027] 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.

Claims

1. A disc structure for a multi-disc concentrator, comprising a hollow main shaft (1), a sealing strip (2), and a plurality of sector plates (3), wherein the plurality of sector plates (3) are arranged circumferentially along the hollow main shaft (1) and connected to the hollow main shaft (1) via the sealing strip (2); characterized in that, The hollow spindle (1) has an annular groove (11) that connects to the interior of the hollow spindle (1) along its outer side wall. The sealing strip (2) is fitted onto the annular groove (11). The fan-shaped plate (3) has a countersunk hole (32) at its bottom. A screw (4) is provided in the countersunk hole (32). The screw (4) passes through the sealing strip (2) and is threaded to the bottom wall of the annular groove (11). By tightening the screw (4), the fan-shaped plate (3) can press the sealing strip (2) together, thereby sealing the hollow spindle (1).

2. The disc structure of the multi-disc concentrator according to claim 1, characterized in that, The cross-section of the annular groove (11) is trapezoidal.

3. The disc structure of the multi-disc concentrator according to claim 1, characterized in that, The sealing strip (2) is inserted into the annular groove (11), and the screw (4) is inserted into the countersunk hole (32).

4. The disc structure of the multi-disc concentrator according to claim 1, characterized in that, Two sealing strips (2) are provided, and the two sealing strips (2) are respectively arranged on both sides of the fan-shaped plate (3). The outer side and bottom surface of the sealing strip (2) abut against the inner side wall and inner bottom wall of the annular groove (11) respectively.

5. The disc structure of the multi-disc concentrator according to claim 4, characterized in that, The fan-shaped plate (3) has pressure plates (31) on both sides of its bottom. The pressure plates (31) have countersunk holes (32) at both ends. Tightening the screws (4) will cause the two pressure plates (31) to press the two sealing strips (2).

6. The disc structure of the multi-disc concentrator according to claim 5, characterized in that, The pressure plate (31) is embedded in the outer surface of the sealing strip (2), and the surface of the pressure plate (31) is coated with a wear-resistant layer.

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