A drum filter drum structure and a drum filter

Abstract

The application provides a drum filter roller structure and a drum filter, and relates to the field of filtering equipment.The drum filter roller structure comprises a roller, a filter screen and a sealing assembly.The roller comprises a pair of oppositely arranged end covers and a roller frame arranged between the pair of end covers.Each end of the roller frame is connected with an end cover.A water passage is arranged on each end cover.The filter screen is wrapped on the roller frame and can be enclosed with the roller frame and the end cover to form a filtering cavity suitable for containing a liquid to be filtered.A sealing assembly is arranged between the filter screen and the roller frame.The sealing assembly comprises, in sequence from a water inlet direction to a water outlet direction, a corrosion-resistant abutting ring and a receiving unit.The liquid to be filtered can apply a force to the corrosion-resistant abutting ring in the direction of the receiving unit.After the corrosion-resistant abutting ring abuts on the receiving unit, the receiving unit can be deformed to fill the gap between the filter screen and the roller frame.The application has good sealing effect and corrosion resistance, and the sealing assembly does not need to be replaced.

Description

Technical Field

[0001] This application relates to the field of filtration equipment, and in particular to a drum structure for a rotary drum filter, and also to a rotary drum filter. Background Technology

[0002] Seawater typically contains a large amount of particulate matter, silt, microorganisms, and other harmful substances. To utilize it, these impurities, dust, rust, and other harmful substances must be filtered out. For example, saltwater fish farmers must filter seawater before using it, thus requiring filtration equipment.

[0003] A rotary drum filter is a type of filtration equipment. It contains a drum through which seawater seeps through a filter screen on the surface of the drum for filtration. The drum rotates so that the part of the drum with attached sediment moves to the cleaning zone for washing, allowing the sediment to be removed from the filter screen. Then, the filter screen without sediment is rotated to the filtration zone for seawater filtration, thus ensuring that the filter screen in the filtration zone always maintains a high filtration efficiency.

[0004] In existing technologies, filter screens are generally spliced ​​onto rollers. Therefore, rubber rings are usually used to seal the gap between the filter screen and the roller. However, seawater has a corrosive effect on rubber, which can cause the rubber to harden or crack, thus losing its sealing effect. Therefore, the rubber sealing rings need to be replaced frequently.

[0005] Therefore, a drum structure for a rotary drum filter is needed. Summary of the Invention

[0006] To address the issue of frequent replacement of seals on the drum due to seawater corrosion, this application provides a drum structure and a drum filter.

[0007] The first aspect of this application provides a rotary drum filter drum structure, which adopts the following technical solution: a rotary drum filter drum structure, including a drum, a filter screen and a sealing assembly; The roller includes a pair of end caps disposed opposite each other and a roller frame disposed between the pair of end caps. Each end cap is connected to one end cap at each end of the roller frame. Each end cap is provided with a water inlet. The filter screen covers the roller frame and can form a filter chamber suitable for containing the liquid to be filtered together with the roller frame and the end cap. The sealing assembly is provided between the filter screen and the roller frame. The sealing assembly includes a corrosion-resistant abutment ring and a receiving unit in sequence from the water-facing direction to the water-repellent direction. The liquid to be filtered can apply a force toward the receiving unit to the corrosion-resistant abutment ring. After the corrosion-resistant abutment ring abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen and the end cap or the roller frame.

[0008] By adopting the above technical solution, when the liquid to be filtered (seawater) comes into contact with the anti-corrosion abutment ring through the gap between the filter screen and the drum frame, under the action of water pressure, the liquid to be filtered can exert a force towards the receiving unit on the anti-corrosion abutment ring. After the anti-corrosion abutment ring abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen and the drum frame, making it difficult for the liquid to be filtered to continue to permeate out of the filtration chamber along the gap between the filter screen and the drum frame. In addition, the anti-corrosion abutment ring can isolate the seawater from the receiving unit and can withstand the corrosion of seawater, thus making the sealing component less susceptible to seawater corrosion, ensuring sealing performance, and giving the sealing component a long service life, eliminating the need for frequent replacement of the sealing component.

[0009] Furthermore, the roller frame includes multiple support beams and multiple support rings. The multiple support rings are equally spaced along the length direction of the roller. The center of each support ring is located on the same rotation axis and each support ring is perpendicular to the rotation axis. Each support beam is connected to the inner ring surface of the support ring, and the end cap is connected to the support rings located at both ends of the roller frame. The support ring includes a connecting ring plate connected to the support beam and a limiting ring plate connected to the side of the connecting ring plate facing away from the support beam and perpendicular to the connecting ring plate; The filter screen includes a frame and a mesh connected to the frame. The frame abuts against the limiting ring plate and the connecting ring plate, and the frame, the connecting ring plate and the limiting ring plate form a sealing cavity suitable for accommodating the anti-corrosion abutment ring and the receiving unit.

[0010] By adopting the above technical solution, the formed sealing cavity can limit the anti-corrosion abutment ring and the receiving unit. On the one hand, it can prevent the anti-corrosion abutment ring and the receiving unit from falling off the support ring and losing the sealing effect. On the other hand, the abutment between the frame and the connecting ring plate can prevent the anti-corrosion abutment ring from directly contacting seawater, thereby extending the seawater penetration path and achieving a good sealing effect.

[0011] Furthermore, the anti-corrosion abutment ring is a copper ring, and the water-facing surface of the anti-corrosion abutment ring is provided with a water-facing groove recessed into the limiting ring plate. The water-repellent surface of the anti-corrosion abutment ring is formed with a water-repellent ridge protruding into the limiting ring plate. The receiving unit includes a first deformation ring and a second deformation ring. Both the first deformation ring and the second deformation ring abut against the water-repellent surface of the anti-corrosion abutment ring. The side of the first deformation ring and the second deformation ring that abuts against the water-repellent surface of the anti-corrosion abutment ring matches the water-repellent surface of the anti-corrosion abutment ring. In addition, the first deformation ring also abuts against the connecting ring plate, and the second deformation ring also abuts against the frame.

[0012] By adopting the above technical solution, the copper ring is not corroded by seawater and can isolate the first deformation ring and the second deformation ring from seawater, thus protecting the first deformation ring and the second deformation ring and making them less susceptible to corrosion. This allows the sealing assembly to have a longer service life and eliminates the need for frequent replacement of the sealing assembly.

[0013] Furthermore, the frame includes a limiting edge, which abuts against the support ring. The limiting edge includes a first abutting surface intersecting the length direction of the roller and a second abutting surface parallel to the length direction of the roller. The first abutting surface abuts against the connecting ring plate, and the second abutting surface abuts against the limiting ring plate. The first contact surface gradually inclines towards the corresponding limiting ring plate from the axis of the roller to the axis of the roller away. The water-facing surface of the anti-corrosion contact ring abuts against the first contact surface, and a water-facing contact surface matching the first contact surface is formed on the water-facing surface of the anti-corrosion contact ring.

[0014] By adopting the above technical solution, the inclined design of the first contact surface enables relative sliding between the first contact surface and the water-facing contact surface as the filter screen approaches the drum frame, and applies a force toward the limiting ring plate to the water-facing contact surface, so as to push the anti-corrosion contact ring toward the limiting ring plate, so that the anti-corrosion contact ring can abut against the receiving unit, causing the receiving unit to deform to fill the gap between the filter screen and the drum frame.

[0015] Furthermore, the sealing assembly sequentially includes a clamping ring, a water-swellable layer, and a clean water sealing ring from the water-facing direction to the water-repellent direction. The clamping ring is located on the water-repellent side of the receiving unit and abuts against the first deformation ring and the second deformation ring. The clean water sealing ring abuts against the limiting ring plate. The water-swellable layer abuts between the clean water sealing ring and the clamping ring. The clamping ring has multiple water passage holes, and a rubber gasket is provided between the end of the water passage hole facing the water-swellable layer and the water-swellable layer.

[0016] By adopting the above technical solution, the rubber gasket can isolate the water-swellable layer from seawater until the seawater corrodes the rubber gasket, causing it to rupture. The water-swellable layer will then absorb seawater and expand, pushing the sealing ring towards the anti-corrosion abutment ring. This allows the anti-corrosion abutment ring and the receiving unit to move closer together and be squeezed, enabling the receiving unit to deform further to fill the gap between the filter screen and the roller frame, thereby enhancing the sealing effect.

[0017] Furthermore, the filter screen has a semi-circular structure, and a pair of filter screens arranged opposite each other can be fastened together to form a cylindrical structure. The frame also includes a connecting edge, and the filter screens arranged opposite each other are connected via the connecting edge. An axial water-blocking unit is provided between the connecting edges, and the axial water-blocking unit extends along the length direction of the roller.

[0018] By adopting the above technical solution, the joints of the filter screen can be sealed.

[0019] Furthermore, the axial water-blocking unit sequentially includes a water-swellable strip and a copper strip in the direction close to the filter channel and away from the filter cavity; each of the connecting sides is provided with a receiving groove, and the receiving grooves on two connected connecting sides cooperate to form a receiving cavity suitable for accommodating the axial water-blocking unit. After the water-swellable strip expands when it comes into contact with water, it can apply a force to the copper strip in the direction away from the filter cavity, so as to abut the copper strip against the groove wall of the receiving groove away from the filter cavity.

[0020] By adopting the above technical solution, the water-swellable strip can apply a force to the copper strip in a direction away from the filter chamber after it expands in water, so as to abut the copper strip against the groove wall of the receiving tank away from the filter chamber, thereby making the gap between the copper strip and the groove wall of the receiving tank away from the filter chamber smaller, so as to achieve a seal at the joint between the two connecting edges.

[0021] Furthermore, an insertion groove is formed on the side of the copper strip facing away from the filter cavity, and a pair of opposing wedge-shaped surfaces are formed in the insertion groove. An abutting protrusion is formed on the groove wall of the receiving groove away from the filter cavity. When the water-swellable strip is not in contact with water, the abutting protrusion is located outside the insertion groove. When the water-swellable strip expands in contact with water, the abutting protrusion is inserted into the insertion groove, and the wedge-shaped surface can apply a pushing force to the abutting protrusion to press the opposing abutting protrusion together.

[0022] By adopting the above technical solution, when the water-swellable strip is not exposed to water, the abutting protrusion is located outside the insertion groove, which facilitates the connection and installation between the two connecting sides. When the water-swellable strip expands in water, the abutting protrusion can be inserted into the insertion groove, and the wedge-shaped surface can apply a pushing force to the abutting protrusion to press the relatively set abutting protrusion tightly, thereby reducing the gap between the two connecting sides and improving the sealing effect.

[0023] Furthermore, the receiving groove is located on the side of the connecting edge near the filter chamber, and the end faces of both ends of the receiving groove are in communication with the corresponding sealing element receiving chamber.

[0024] By adopting the above technical solution, even if seawater flows along the copper strip to the support ring, the sealing component can still achieve a good sealing effect.

[0025] The second aspect of this application provides a rotary drum filter, which adopts the following technical solution: a rotary drum filter, including the rotary drum structure described in any one of the above technical solutions.

[0026] By adopting the above technical solution, the rotary drum filter of this application has all the technical advantages of the above-mentioned rotary drum filter drum structure.

[0027] In summary, this application includes at least one of the following beneficial effects: 1. When the liquid to be filtered (seawater) comes into contact with the anti-corrosion abutment ring through the gap between the filter screen and the drum frame, under the action of water pressure, the liquid to be filtered can exert a force towards the receiving unit on the anti-corrosion abutment ring. After the anti-corrosion abutment ring abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen and the drum frame, so that the liquid to be filtered is not easy to continue to seep out of the filtration chamber along the gap between the filter screen and the drum frame. The anti-corrosion abutment ring can isolate the seawater from the receiving unit and can withstand the corrosion of seawater, so that the sealing component is not easily corroded by seawater, ensuring the sealing performance and giving the sealing component a long service life, without the need for frequent replacement of the sealing component. 2. The rubber gasket can isolate the water-swellable layer from seawater until the seawater corrodes the rubber gasket, causing it to break. After the rubber gasket breaks, the water-swellable layer will absorb seawater and expand, which can push the clamping ring to move towards the anti-corrosion abutment ring. This allows the anti-corrosion abutment ring and the receiving unit to get closer and squeeze each other, so that the receiving unit can further deform to fill the gap between the filter screen and the roller frame, thereby strengthening the sealing effect between the filter screen and the roller frame. 3. When the water-swellable strip is not wet, the abutting rib is located outside the insertion groove, which facilitates the connection and installation between the two connecting sides. When the water-swellable strip expands when wet, the abutting rib can be inserted into the insertion groove, and the wedge-shaped surface can apply a pushing force to the abutting rib to press the oppositely arranged abutting rib tightly, thereby reducing the gap between the two connecting sides and improving the sealing effect at the gap between the two connecting sides. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of a rotary drum filter according to this application; Figure 2 This application relates to a rotary drum filter. Figure 1 The axial longitudinal section view of the central inlet shows the specific structure of a drum filter drum structure according to this application. Figure 3 yes Figure 2 Enlarged view of region A in the middle; Figure 4 yes Figure 3 A partial structural schematic diagram of the cross-sectional view along the BB direction shows the cross-sectional structure of the axial water-blocking unit.

[0029] Explanation of reference numerals in the attached drawings: 1. Roller; 11. End cap; 111. Water inlet; 12. Roller frame; 121. Support beam; 122. Support ring; 1221. Connecting ring plate; 1222. Limiting ring plate; 2. Filter screen; 21. Frame; 211. Limiting edge; 2111. First abutment surface; 2112. Second abutment surface; 212. Connecting edge; 2121. Receiving groove; 2122. Abutment protrusion; 22. 3. Sealing assembly; 31. Corrosion-resistant abutment ring; 311. Water-facing groove; 312. Water-returning ridge; 313. Water-facing abutment surface; 321. First deformation ring; 322. Second deformation ring; 33. Tightening ring; 331. Water passage hole; 34. Water-swellable layer; 35. Clean water sealing ring; 36. Rubber gasket; 4. Axial water-blocking unit; 41. Water-swellable strip; 42. Copper strip; 421. Insert groove. Detailed Implementation

[0030] Figure 1 This is a three-dimensional structural diagram of a rotary drum filter according to this application. Figure 2 This application relates to a rotary drum filter. Figure 1 The axial longitudinal section view of the central inlet shows the specific structure of a drum filter roller structure according to this application. See [link / reference]. Figure 1 and Figure 2The first aspect of this application provides a rotary drum filter structure including a drum 1, a filter screen 2, and a sealing assembly 3. The drum 1 may be configured to include a pair of oppositely arranged end caps 11 and a drum frame 12 disposed between the pair of end caps 11. Each end of the drum frame 12 is connected to an end cap 11, and each end cap 11 is provided with a water inlet 111. The filter screen 2 covers the drum frame 12 and can form a filter chamber suitable for accommodating the liquid to be filtered together with the drum frame 12 and the end caps 11. A sealing assembly 3 is provided between the filter screen 2 and the drum frame 12.

[0031] Figure 3 yes Figure 2 See the enlarged view of region A in the middle. Figure 2 and Figure 3 The sealing assembly 3 is configured to include a corrosion-resistant abutment ring 31 and a receiving unit in sequence from the water-facing direction to the water-receiving direction. The liquid to be filtered (i.e., seawater) can apply a force toward the receiving unit to the corrosion-resistant abutment ring 31. After the corrosion-resistant abutment ring 31 abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen 2 and the end cap 11 or the roller frame 12.

[0032] With the above structural design, when the liquid to be filtered (seawater) comes into contact with the anti-corrosion abutment ring 31 through the gap between the filter screen 2 and the roller frame 12, under the action of water pressure, the liquid to be filtered can exert a force towards the receiving unit on the anti-corrosion abutment ring 31. After the anti-corrosion abutment ring 31 abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen 2 and the roller frame 12, making it difficult for the liquid to be filtered to continue to permeate out of the filter chamber along the gap between the filter screen 2 and the roller frame 12. The anti-corrosion abutment ring 31 can isolate the seawater from the receiving unit and can withstand the corrosion of seawater, thus making the sealing component 3 less susceptible to seawater corrosion, ensuring sealing performance, and giving the sealing component 3 a long service life, thereby eliminating the need for frequent replacement of the sealing component 3.

[0033] See Figure 2 and Figure 3 The roller frame 12 can be specifically configured to include multiple support beams 121 and multiple support rings 122. The multiple support rings 122 are equally spaced along the length direction of the roller 1. The center of each support ring 122 is located on the same rotation axis and each support ring 122 is perpendicular to the rotation axis. Each support beam 121 is connected to the inner ring surface of the support ring 122. The end cap 11 is connected to the support rings 122 located at both ends of the roller frame 12. The support ring 122 includes a connecting ring plate 1221 connected to the support beam 121 and a limiting ring plate 1222 connected to the side of the connecting ring plate 1221 facing away from the support beam 121 and perpendicular to the connecting ring plate 1221.

[0034] Figure 4 yes Figure 3A partial structural schematic diagram of the cross-sectional view along the BB direction shows the cross-sectional structure of the axial water-retaining unit. See [link / reference]. Figure 3 and Figure 4 The filter screen 2 can be configured as a semi-circular structure. A pair of filter screens 2 arranged opposite each other can be fastened to form a cylindrical structure. Each filter screen 2 includes a frame 21 and a mesh body 22 connected to the frame 21. The frame 21 may specifically include a limiting edge 211 and a connecting edge 212. The filter screens 2 arranged opposite each other are connected by the connecting edge 212. The limiting edge 211 abuts against the support ring 122. The limiting edge 211 may specifically include a first abutting surface 2111 intersecting the length direction of the roller 1 and a second abutting surface 2112 parallel to the length direction of the roller 1. The first abutting surface 2111 abuts against the connecting ring plate 1221, and the second abutting surface 2112 abuts against the limiting ring plate 1222. The first contact surface 2111, the second contact surface 2112, the connecting ring plate 1221, and the limiting ring plate 1222 form a sealing cavity suitable for accommodating the anti-corrosion contact ring 31 and the receiving unit. The formed sealing cavity can limit the anti-corrosion contact ring 31 and the receiving unit. On the one hand, it can prevent the anti-corrosion contact ring 31 and the receiving unit from falling off the support ring 122 and losing the sealing effect. On the other hand, the contact between the frame 21 and the connecting ring plate 1221 can prevent the anti-corrosion contact ring 31 from directly contacting seawater, thereby extending the seawater penetration path and achieving a good sealing effect.

[0035] Furthermore, the first abutting surface 2111 can be configured to gradually tilt towards the corresponding limiting ring plate 1222 in the direction from the axis near the roller 1 to the axis away from the roller 1. The water-facing surface of the anti-corrosion abutting ring 31 abuts against the first abutting surface 2111, and a water-facing abutting surface 313 matching the first abutting surface 2111 is formed on the water-facing surface of the anti-corrosion abutting ring 31. The inclined design of the first abutting surface 2111 allows the filter screen 2 to slide relative to the first abutting surface 2111 and the water-facing abutting surface 313 during the process of approaching the roller frame 12, and can apply a force towards the limiting ring plate 1222 to the water-facing abutting surface 313, so as to push the anti-corrosion abutting ring towards the limiting ring plate 1222, so that the anti-corrosion abutting ring 31 can abut against the receiving unit, so that the receiving unit can deform to fill the gap between the filter screen 2 and the roller frame 12.

[0036] See Figure 3The anti-corrosion abutment ring 31 is a copper ring. The water-facing surface of the anti-corrosion abutment ring 31 has a water-facing groove 311 recessed into the limiting ring plate 1222. The water-repellent surface of the anti-corrosion abutment ring 31 has a water-repellent ridge 312 protruding into the limiting ring plate 1222. The receiving unit includes a first deformation ring 321 and a second deformation ring 322. The first deformation ring 321 and the second deformation ring 322 can be made of copper or rubber and both abut against the water-repellent surface of the anti-corrosion abutment ring 31. The first deformation ring 321 and the second deformation ring 322 abut against the water-repellent surface of the anti-corrosion abutment ring 31. One side of each ring matches the back surface of the anti-corrosion contact ring 31, and the first deformation ring 321 also abuts against the connecting ring plate 1221, while the second deformation ring 322 abuts against the frame 21. The copper rings are not corroded by seawater and can isolate the first deformation ring 321 and the second deformation ring 322 from seawater, thus protecting the first deformation ring 321 and the second deformation ring 322. This makes the first deformation ring 321 and the second deformation ring 322 less prone to corrosion, thereby enabling the sealing assembly 3 to have a long service life and eliminating the need for frequent replacement of the sealing assembly 3.

[0037] See Figure 3 Furthermore, the sealing assembly 3, from the water-facing direction to the water-repellent direction, also includes, in sequence, a clamping ring 33, a water-swellable layer 34 (made of water-swellable rubber), and a clean water sealing ring 35. Specifically, the clamping ring 33 is located on the water-repellent side of the receiving unit and abuts against the first deformation ring 321 and the second deformation ring 322. The clean water sealing ring 35 abuts against the limiting ring plate 1222. The water-swellable layer 34 abuts between the clean water sealing ring 35 and the clamping ring 33. The clamping ring 33 has multiple water passage holes 331, with the water passage holes 331 facing the water-swellable layer 34. A rubber gasket 36 is provided between one end of the water-swellable layer 34 and the water-swellable layer 34. The rubber gasket 36 can isolate the water-swellable layer 34 from seawater until the seawater corrodes the rubber gasket 36, causing the rubber gasket 36 to break. Then, the water-swellable layer 34 will absorb seawater and expand, which can push the sealing ring 33 to move towards the anti-corrosion sealing ring 31. This allows the anti-corrosion sealing ring 31 and the receiving unit to get closer to each other and squeeze each other, so that the receiving unit can further deform to fill the gap between the filter screen 2 and the roller frame 12, thereby enhancing the sealing effect.

[0038] See Figure 3 and Figure 4An axial water-blocking unit 4 is provided between the connecting edges 212. The axial water-blocking unit 4 extends along the length of the roller 1 to achieve a seal at the joint of the filter screen 2. Specifically, the axial water-blocking unit 4 includes a water-swellable strip 41 (made of water-swellable rubber) and a copper strip 42 in sequence in the direction close to the filter cavity and away from the filter cavity. Each connecting edge 212 is provided with a receiving groove 2121. The receiving grooves 2121 on the two connecting edges 212 cooperate to form a receiving cavity suitable for receiving the axial water-blocking unit 4. After the water-swellable strip 41 expands when exposed to water, it can apply a force to the copper strip 42 in the direction away from the filter cavity, so as to abut the copper strip 42 against the groove wall of the receiving groove 2121 away from the filter cavity, so that the gap between the copper strip 42 and the groove wall of the receiving groove 2121 away from the filter cavity is smaller, thereby achieving a seal at the joint between the two connecting edges 212.

[0039] A groove 421 is formed on the side of the copper strip 42 facing away from the filter chamber. A pair of opposing wedge-shaped surfaces are formed in the groove 421. An abutting rib 2122 protruding towards the filter chamber is formed on the groove wall of the receiving groove 2121 away from the filter chamber. When the water-swellable strip 41 is not wet, the abutting rib 2122 is located outside the groove 421 to facilitate the connection and installation between the two connecting edges 212. When the water-swellable strip 41 expands when wet, the abutting rib 2122 is inserted into the groove 421, and the wedge-shaped surfaces can apply a pushing force to the abutting rib 2122 to press the opposing abutting ribs 2122 together, thereby reducing the gap between the two connecting edges 212 and improving the sealing effect.

[0040] The receiving groove 2121 is located on the side of the connecting edge 212 near the filter chamber. The end faces of both ends of the receiving groove 2121 are connected to the corresponding sealing cavity, so that even if seawater flows along the copper strip 42 to the support ring 122, the sealing component 3 can achieve a good sealing effect.

[0041] Furthermore, such as Figure 2 As shown, the rotary drum filter provided in the second aspect of this application includes the rotary drum filter drum structure of any of the above-mentioned technical solutions, and also has all the technical advantages of the above-mentioned rotary drum filter drum structure.

[0042] The drum structure and working principle of the rotary drum filter in this application are as follows: When the liquid to be filtered (seawater) passes through the gap between the filter screen 2 and the roller frame 12 and comes into contact with the anti-corrosion abutment ring 31, under the action of water pressure, the liquid to be filtered can exert a force towards the receiving unit on the anti-corrosion abutment ring 31. After the anti-corrosion abutment ring 31 abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen 2 and the roller frame 12, so that the liquid to be filtered is not easy to continue to seep out of the filter chamber along the gap between the filter screen 2 and the roller frame 12. The anti-corrosion abutment ring 31 can isolate the seawater from the receiving unit and can withstand the corrosion of seawater, so that the sealing component 3 is not easily corroded by seawater, ensuring the sealing performance and giving the sealing component 3 a long service life, without the need for frequent replacement of the sealing component 3.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drum filter bowl structure, characterized by, Includes a roller (1), a filter screen (2), and a sealing assembly (3); The roller (1) includes a pair of end caps (11) arranged opposite to each other and a roller frame (12) disposed between the pair of end caps (11). Each end cap (11) is connected to one end cap (11) at both ends of the roller frame (12). Each end cap (11) is provided with a water inlet (111). The filter screen (2) covers the roller frame (12) and can form a filter chamber suitable for containing the liquid to be filtered together with the roller frame (12) and the end caps (11). The sealing assembly (3) is provided between the filter screen (2) and the roller frame (12). The sealing assembly (3) includes a corrosion-resistant abutment ring (31) and a receiving unit in sequence from the water-facing direction to the water-repellent direction. The liquid to be filtered can apply a force toward the receiving unit to the corrosion-resistant abutment ring (31). After the corrosion-resistant abutment ring (31) abuts against the receiving unit, the receiving unit can deform to fill the gap between the filter screen (2) and the roller frame (12). The roller frame (12) includes multiple support beams (121) and multiple support rings (122). The multiple support rings (122) are equally spaced along the length direction of the roller (1). The center of each support ring (122) is located on the same rotation axis and each support ring (122) is perpendicular to the rotation axis. Each support beam (121) is connected to the inner ring surface of the support ring (122). The end cap (11) is connected to the support rings (122) located at both ends of the roller frame (12). The support ring (122) includes a connecting ring plate (1221) connected to the support beam (121) and a limiting ring plate (1222) connected to the side of the connecting ring plate (1221) facing away from the support beam (121) and perpendicular to the connecting ring plate (1221). The filter screen (2) includes a frame (21) and a mesh body (22) connected to the frame (21). The frame (21) abuts against the limiting ring plate (1222) and the connecting ring plate (1221), and together with the frame (21), the connecting ring plate (1221) and the limiting ring plate (1222), a sealing cavity suitable for accommodating the anti-corrosion abutment ring (31) and the receiving unit is formed. The anti-corrosion abutment ring (31) is a copper ring. The water-facing surface of the anti-corrosion abutment ring (31) has a water-facing groove (311) recessed into the limiting ring plate (1222). The water-repellent surface of the anti-corrosion abutment ring (31) has a water-repellent ridge (312) protruding into the limiting ring plate (1222). The receiving unit includes a first deformation ring (321) and a second deformation ring (322). The first deformation ring (321) and the second deformation ring (322)... The deformation rings (322) all abut against the back water surface of the anti-corrosion abutment ring (31). The sides of the first deformation ring (321) and the second deformation ring (322) that abut against the back water surface of the anti-corrosion abutment ring (31) are matched with the back water surface of the anti-corrosion abutment ring (31). The first deformation ring (321) also abuts against the connecting ring plate (1221), and the second deformation ring (322) also abuts against the frame (21).

2. The drum structure of a rotary drum filter according to claim 1, characterized in that: The frame (21) includes a limiting edge (211), which abuts against the support ring (122). The limiting edge (211) includes a first abutting surface (2111) intersecting the length direction of the roller (1) and a second abutting surface (2112) parallel to the length direction of the roller (1). The first abutting surface (2111) abuts against the connecting ring plate (1221), and the second abutting surface (2112) abuts against the limiting ring plate (1222). The first abutting surface (2111) gradually tilts towards the corresponding limiting ring plate (1222) from the axis close to the roller (1) to the axis away from the roller (1). The water-facing surface of the anti-corrosion abutting ring (31) abuts against the first abutting surface (2111), and a water-facing abutting surface (313) matching the first abutting surface (2111) is formed on the water-facing surface of the anti-corrosion abutting ring (31).

3. The drum structure of a rotary drum filter according to claim 2, characterized in that: The sealing assembly (3) includes, in sequence from the water-facing direction to the water-repellent direction, a clamping ring (33), a water-swellable layer (34), and a clean water sealing ring (35). The clamping ring (33) is located on the water-repellent side of the receiving unit and abuts against the first deformation ring (321) and the second deformation ring (322). The clean water sealing ring (35) abuts against the limiting ring plate (1222). The water-swellable layer (34) abuts between the clean water sealing ring (35) and the clamping ring (33). The clamping ring (33) has multiple water passage holes (331). A rubber gasket (36) is provided between the end of the water passage hole (331) facing the water-swellable layer (34) and the water-swellable layer (34).

4. The drum structure of a rotary drum filter according to claim 3, characterized in that: The filter screen (2) has a semi-circular structure. A pair of filter screens (2) arranged opposite to each other can be fastened to form a cylindrical structure. The frame (21) also includes a connecting edge (212). The filter screens (2) arranged opposite to each other are connected via the connecting edge (212). An axial water-blocking unit (4) is provided between the connecting edges (212). The axial water-blocking unit (4) extends along the length direction of the roller (1).

5. The drum structure of a rotary filter according to claim 4, characterized in that: The axial water-blocking unit (4) includes a water-swellable strip (41) and a copper strip (42) in sequence in the direction close to the filter channel and away from the filter cavity; each of the connecting edges (212) is provided with a receiving groove (2121), and the receiving grooves (2121) on two connected connecting edges (212) cooperate to form a receiving cavity suitable for accommodating the axial water-blocking unit (4). After the water-swellable strip (41) expands when it comes into contact with water, it can apply a force to the copper strip (42) in the direction away from the filter cavity, so as to abut the copper strip (42) against the groove wall of the receiving groove (2121) away from the filter cavity.

6. The drum structure of a rotary drum filter according to claim 5, characterized in that: A insertion groove (421) is formed on the side of the copper strip (42) facing away from the filter cavity. A pair of opposing wedge-shaped surfaces are formed in the insertion groove (421). An abutting rib (2122) protruding towards the filter cavity is formed on the groove wall of the receiving groove (2121) away from the filter cavity. When the water-swellable strip (41) is not in contact with water, the abutting rib (2122) is located outside the insertion groove (421). When the water-swellable strip (41) expands in contact with water, the abutting rib (2122) is inserted into the insertion groove (421), and the wedge-shaped surface can apply a pushing force to the abutting rib (2122) to press the opposing abutting rib (2122) together.

7. The drum structure of a rotary drum filter according to claim 6, characterized in that: The receiving groove (2121) is located on the side of the connecting edge (212) near the filter chamber, and the end faces of both ends of the receiving groove (2121) are in communication with the corresponding sealing member receiving chamber.

8. A rotary drum filter, characterized in that: The rotary drum filter structure includes any one of claims 1 to 7.

Images