Face plate sealing structure for filter backflushing

Abstract

The utility model provides a disc chuck sealing structure for filter backflushing, which relates to the field of seawater filtering equipment, and comprises a base plate, the surface of the base plate, which is abutted against and sealed with a disc chuck, is a sealing surface, the sealing surface is provided with a plurality of grooves recessed in the sealing surface, the grooves are not communicated with slide block through holes in the base plate, and / or the grooves are spaced from the edge of the base plate; the utility model has the beneficial effects that after the slide block through hole corresponds to the faceplate hole in the faceplate, water cannot flow out from the edge of the base plate through the faceplate hole and the groove, so that the sealing property is ensured; the grooves are formed to collect tiny gravels, abrasion to the base plate is reduced, the service life is prolonged, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model belongs to the field of seawater filtration equipment, and in particular relates to a flower disc sealing structure for filter backwashing. Background Technology

[0002] Seawater filters are a type of industrial automatic filter that offers a variety of comprehensive applications. They are used to purify water and protect other equipment in the system, and are particularly suitable for applications on ships and offshore platforms.

[0003] A seawater filter typically consists of a tank, filter elements, a backwashing mechanism, a differential pressure detection mechanism, an electrical control box, a drive motor, electric valves, and a differential pressure control device. The tank contains a perforated disc that divides the internal cavity into a turbid liquid chamber and a clear liquid chamber. Multiple filter elements are fixedly mounted on the upper part of the perforated disc, while a sealing slider that rotates along its lower surface is located at the lower end of the disc. The sealing slider is connected to the backwash shaft via a rotating column. Its working principle is as follows: the wastewater to be filtered enters the tank from the bottom of the filter, flows upward through the perforated disc into the inner cavity of the filter element, and then flows outward through the filter element. The filtered clean water flows out from the outlet at the top of the filter, while solid impurities are trapped inside the filter element. As impurities accumulate on the inner wall of the filter element, the pressure difference between the inlet and outlet gradually increases. A differential pressure detection mechanism is installed at the inlet and outlet, and the differential pressure controller automatically starts the backwashing mechanism. The backwashing system can also be manually started to remove filter residue.

[0004] During backwashing, there is no need to shut off the inlet water flow. The motor drives the rotating column, along with the sealing slider, to rotate, simultaneously opening the backwash drain valve and the control valve on the flushing pipe. Each filter element is backwashed sequentially by filtered clean water. Due to the pressure difference between the water pressure and atmospheric pressure in the filter, the filtrate flows backward, flushing down impurities trapped on the inner wall of the filter element and discharging them through the drain pipe. Backwashing ends after the sealing slider has rotated one revolution. The backwash valve then closes, and the drive motor stops working.

[0005] Previously, the company applied for a utility model patent, publication number: 2021208675763, which disclosed a flower disc sealing structure. This application adds a tension spring between the sealing slider and the rotating column. When the sealing slider wears down due to long-term operation, resulting in a poor seal between the sealing slider and the flower disc, the elasticity plays an adjusting role and provides timely force replenishment to ensure the sealing performance of the flower disc sealing structure. By setting the base plate of the sealing slider to be an elongated ellipse, it effectively ensures that the filter element to be cleaned is in a fully sealed state, and avoids a semi-sealed state where filtration and cleaning occur at the same time, which greatly improves the cleaning effect of the filter element.

[0006] The initial installation of the substrate ensures a smooth surface finish and guarantees sealing performance. However, in seawater conditions, the presence of tiny sand particles causes friction between the substrate and the bottom of the tray during movement. This friction, caused by the sand particles, can lead to wear and tear on the substrate over time, potentially resulting in leakage and affecting the sealing performance, thus impacting cleaning effectiveness. Therefore, we have implemented improvements to reduce sand and gravel abrasion on the substrate. Summary of the Invention

[0007] To address the problems existing in the prior art, the purpose of this utility model is to provide a filter backflushing disc sealing structure that reduces the wear of the substrate by gravel.

[0008] A filter backwashing disc sealing structure includes a base plate, wherein the surface of the base plate that abuts and seals with the disc is a sealing surface, and the sealing surface is provided with a plurality of grooves recessed into the sealing surface. The grooves are not connected to the slider through holes on the base plate, and / or the grooves are at a distance from the edge of the base plate. Thus, after the slider through holes correspond to the disc holes on the disc, water cannot flow out from the edge of the base plate through the disc holes and grooves, thereby ensuring the sealing performance.

[0009] Furthermore, the groove can be set in any shape, including annular, arc-shaped, straight, V-shaped, or other or combinations of the above shapes;

[0010] The groove is preferably a combination of annular and arc-shaped. The annular groove surrounds the outer periphery of the flower plate hole, and the arc-shaped groove is evenly distributed on both sides of the slider through hole in the length direction of the substrate, and the inner edge of the arc-shaped groove faces the direction of the flower plate hole; or multiple straight grooves are arranged in a cross shape on the sealing surface.

[0011] Furthermore, several of the grooves are arranged intersecting or parallel on the sealing surface;

[0012] Furthermore, the sides of the groove are square, triangular, or semi-circular;

[0013] Furthermore, the height of the groove is between 0.5cm and 2cm; the distance from the bottom surface of the substrate is between 0.5cm and 2cm.

[0014] Furthermore, the distance between the groove and the through hole of the slider is ≥3cm; the distance between the groove and the edge of the substrate is ≥3cm;

[0015] Furthermore, the substrate is an arc-shaped ellipse, and the substrate can completely cover two adjacent flower disc holes on the same circumference but cannot completely cover three adjacent flower disc holes on the same circumference; that is, the arc length of the central major axis of the substrate is greater than the minimum arc length of the center of the flower disc, passing through the center of the two adjacent flower disc holes on the same circumference and the outer circumference point.

[0016] Furthermore, the concave surface on both sides of the arc-shaped substrate is a concave surface, and the convex surface is a convex surface. The slider through hole on the substrate is located at the center of gravity of the substrate. That is, after the substrate is symmetrically folded, the center point of the slider through hole is located on the straight line after folding, and the distance of the slider through hole from the concave surface is greater than the distance from the convex surface.

[0017] The filter backwashing disc sealing structure also includes a sealing slider and a rotating column that can drive the sealing slider to rotate. The cylindrical sealing slider is fixed on the bottom surface of the substrate and located on the outer circumferential surface of the slider through hole. The sealing slider has two elongated holes symmetrically arranged in the circumferential direction. The rotating column has two positioning holes corresponding to the positions of the elongated holes. The sealing slider extends into the rotating column and is limited by pins passing through the positioning holes and elongated holes.

[0018] The surface of the flower disc has several through holes evenly distributed in the circumference, and several filter elements corresponding to the number of holes are fixedly installed at the upper end of the flower disc.

[0019] Furthermore, a tension spring is provided between the rotating column and the sealing slider. One end of the tension spring is fixedly connected to the bottom surface of the substrate, and the other end is fixedly connected to the outer wall of the sealing slider. The elasticity of the tension spring makes the substrate press tightly against the bottom surface of the flower plate.

[0020] The sealing slider is provided with an annular groove in the circumference, and an O-ring is provided in the annular groove;

[0021] The sealing slider is made of wear-resistant and corrosion-resistant material, including polytetrafluoroethylene, and the substrate is made of copper.

[0022] The advantages and positive effects of this utility model are:

[0023] Based on the original flower disc sealing structure, this utility model has multiple grooves on the surface of the substrate to accommodate tiny sand and gravel in seawater. When the substrate encounters sand and gravel while rotating along the bottom surface of the flower disc, it will rotate with the sand and gravel, and most of the sand and gravel will enter the grooves in sequence, thus no longer abrading the substrate. This utility model reduces the problem of uneven sealing surface caused by abrasion of the substrate, thereby ensuring the sealing performance of the substrate.

[0024] In the above process, because the groove is not connected to the slider through hole on the substrate, and / or the groove is at a distance from the edge of the substrate, after the slider through hole corresponds to the flower plate hole on the flower plate, because they are not connected, water cannot flow out from the edge of the substrate through the flower plate hole and the groove, thus ensuring the sealing performance.

[0025] By setting the grooves to a combination of annular and arc shapes, it is convenient to collect sand and gravel around the slider through hole and other parts. By setting the grooves to a cross shape, it is convenient to collect sand and gravel both horizontally and vertically. This structure has a better sand and gravel collection effect. The grooves also reduce the weight of the substrate, avoiding the problem of unstable center of gravity during rotation caused by the substrate being too heavy and the sealing slider not being at the center of gravity of the substrate.

[0026] It is easier to clean later when the sides of the groove are triangular or semi-circular.

[0027] The height of the groove is between 0.5cm and 2cm, and the distance from the bottom surface of the substrate is between 0.5cm and 2cm, which ensures that the groove can accommodate a certain amount of sand and gravel without affecting the quality of the substrate.

[0028] The distance between the groove and the through hole of the slider is ≥3cm, and the distance between the groove and the edge of the substrate is ≥3cm. Therefore, the through hole of the slider and the groove maintain a certain distance, which further ensures the sealing performance of this utility model.

[0029] Initially, the slider through-hole and sealing slider were located at the center of the substrate. We optimized the positions of the slider through-hole and sealing slider by moving them to the center of gravity of the substrate. Therefore, the connection between the sealing slider and the substrate is itself a stable and balanced structure, avoiding the problem of unstable center of gravity and further ensuring the sealing performance of the substrate.

[0030] The surface of the filter disc has several through-holes evenly distributed around its perimeter. Several filter elements, corresponding to the number of holes, are fixedly mounted on the upper part of the disc. When impurities accumulate to a certain level on the inner wall of the filter element, a differential pressure detection and control mechanism activates the drive unit. This drive unit rotates the rotating column along with the sealing slider, simultaneously opening the backwash drain valve and the control valve on the flushing pipe, initiating the cleaning of each filter element one by one. The remaining filter elements continue filtration. By setting the base plate of the sealing slider to an elongated ellipse shape, the filter element to be cleaned is effectively kept in a fully sealed state, avoiding a semi-sealed state where filtration and cleaning occur simultaneously, thus greatly improving the cleaning effect.

[0031] Compared with the prior art, the flower plate sealing structure provided by this utility model adds a tension spring between the sealing slider and the rotating column. When the sealing slider wears down after long-term operation, causing the seal between the sealing slider and the flower plate to become loose, the elasticity plays an adjusting role and provides timely force replenishment to ensure the sealing performance of the flower plate sealing structure.

[0032] An O-ring is installed in the groove to further ensure the sealing between the sealing slider and the rotating column.

[0033] The sealing slider is made of polytetrafluoroethylene, which makes it corrosion resistant and extends its service life. Attached Figure Description

[0034] Figure 1 Schematic diagram of the three-dimensional structure of the substrate.

[0035] Figure 2 A top view of a substrate with straight grooves.

[0036] Figure 3 A top view of a substrate with annular and arc-shaped grooves.

[0037] Figure 4 A top view of a substrate with a V-shaped groove.

[0038] Figure 5 A top view of a substrate with intersecting grooves.

[0039] Figure 6 A schematic diagram showing a semi-circular groove after the substrate is cut.

[0040] Figure 7 A schematic diagram showing a triangular groove after the substrate is cut.

[0041] Figure 8 Schematic diagram of the flower disc sealing structure for filter backflushing.

[0042] Figure 9 Schematic diagram of the substrate and sealing slider.

[0043] Figure 10 A schematic diagram showing the usage state of rotating between two adjacent flower disc holes (only the flower disc holes are shown for easy observation).

[0044] Figure 11 Schematic diagram of a traditional substrate and slider through-hole;

[0045] Figure 12 Comparison of the substrate and slider through-hole of the traditional structure with the substrate and slider through-hole of the present invention;

[0046] In the picture:

[0047] 1. Substrate; 2. Flower plate 1-1; 1-2. Sealing surface 1-2; 2-1. Groove; 2-2. Flower plate hole

[0048] 1-3, concave surface; 1-4, convex surface; 3, slider through hole; 4, sealing slider; 5, rotating column.

[0049] 4-1, elongated hole; 6, pin; 7, tension spring; 8, annular groove. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0051] A filter backflushing disc sealing structure, such as Figure 8 , Figure 9 The diagram shows a substrate 1, a sealing slider 4, and a rotating column 5 that can rotate the sealing slider 4. The sealing slider 4 is made of polytetrafluoroethylene (PTFE), and the substrate 1 is made of copper. The substrate 1 has a slider through-hole 3. The cylindrical sealing slider 4 is fixed to the bottom surface of the substrate 1 and located on the outer circumferential surface of the slider through-hole 3. The sealing slider 4 has two elongated holes 4-1 symmetrically arranged around its circumference. The rotating column 5 has two positioning holes corresponding to the positions of the elongated holes 4-1. A pin 6 passes through the positioning holes and the elongated holes 4-1 to limit the up-and-down sliding of the sealing slider 4. A tension spring 7 is provided between the rotating column 5 and the sealing slider 4. One end of the tension spring 7 is fixedly connected to the bottom surface of the substrate 1, and the other end is fixedly connected to the outer wall of the sealing slider 4. The elasticity of the tension spring 7 makes the substrate 1 press tightly against the bottom surface of the flower plate 2. The sealing slider 4 has an annular groove 8 around its circumference, and an O-ring is provided in the annular groove 8.

[0052] like Figures 1-5 , Figure 10 As shown, the substrate 1 is an arc-shaped ellipse. The substrate 1 can completely cover two adjacent flower disc holes 2-1 on the same circumference but cannot completely cover three adjacent flower disc holes 2-1 on the same circumference. Figure 10 (See the third figure in the text); that is, the arc length of the central major axis of the substrate 1 is greater than the minimum arc length passing through the centers of two adjacent flower plate holes 2-1 and their outer circumferences on the same circumference with the center of the flower plate 2 as the center. The concave surfaces on both sides of the arc of the substrate 1 are concave surfaces 1-3, and the convex surfaces are convex surfaces 1-4. The slider through hole 3 on the substrate 1 is located at the center of gravity of the substrate 1. That is, after the substrate 1 is symmetrically folded, the center point of the slider through hole 3 is located on the straight line after folding, and the distance of the slider through hole 3 from the concave surface 1-3 is greater than the distance from the convex surface 1-4.

[0053] The surface of the substrate 1 that abuts and seals against the flower disc 2 is the sealing surface 1-1, such as... Figures 1-5 As shown, the sealing surface 1-1 is provided with a plurality of grooves 1-2 recessed into the sealing surface 1-1. The grooves 1-2 are not connected to the slider through holes 3 on the substrate 1, and / or the grooves 1-2 are at a distance from the edge of the substrate 1. The height of the grooves 1-2 is 1cm; the distance from the bottom surface of the substrate 1 is 1cm; the distance between the grooves 1-2 and the slider through holes 3 is 3cm; the distance between the grooves 1-2 and the edge of the substrate 1 is 3cm. Therefore, after the slider through holes 3 correspond to the flower plate holes 2-1 on the flower plate 2, water cannot flow out from the edge of the substrate 1 through the flower plate holes 2-1 and the grooves 1-2, thus ensuring the sealing performance.

[0054] Furthermore, such as Figures 1-5 As shown, the grooves 1-2 are arranged in any shape, including annular, arc-shaped, straight, V-shaped, or other or combinations of the above shapes;

[0055] like Figure 3 As shown, the groove 1-2 is a combination of annular and arc-shaped. The annular groove 1-2 surrounds the outer periphery of the flower plate hole 2-1, and the arc-shaped groove 1-2 is evenly distributed on both sides of the slider through hole 3 in the length direction of the substrate 1, and the inner edge of the arc-shaped groove 1-2 is facing the flower plate hole 2-1.

[0056] like Figure 4 As shown, multiple straight grooves 1-2 are arranged in a cross shape on the sealing surface 1-1;

[0057] like Figure 6 , Figure 7 As shown, the sides of the grooves 1-2 are square, triangular, or semi-circular.

[0058] Example 1:

[0059] like Figure 8 , Figure 10 As shown, the flower disc sealing structure provided by this utility model is used in conjunction with the filter element flower disc 2, and its working principle is as follows:

[0060] When impurities accumulate to a certain extent on the inner wall of the filter element, the drive device is activated by the differential pressure detection and control mechanism. The drive device drives the rotating column 5 and the sealing slider 4 to rotate, and at the same time opens the backwash drain valve and the control valve on the flushing pipe to start cleaning the filter elements one by one. The other filter elements that have not been cleaned continue to perform filtration operations.

[0061] The drive device and rotating column 5 mentioned in the above process are existing technologies and will not be described in detail here.

[0062] like Figure 10As shown, the flower disc 2 has 6 flower disc holes 2-1. Taking the clockwise rotation of the flower disc sealing structure as an example, the filter element installed on the first flower disc hole 2-1 is first cleaned. At this time, the through hole 3 of the sealing slider 4 is directly opposite the first flower disc hole 2-1 (the through hole 3 coincides with the flower disc hole). The two flower disc holes 2-1 adjacent to the first flower disc hole 2-1 are partially covered by the substrate 1, but the corresponding filter elements are still in the filtering state. As the rotating column 5 rotates, the sealing slider 4 slowly moves closer to the second flower disc hole 2-1. When the through hole 3 of the slider just contacts the second flower disc hole 2-1, the outer edge of the substrate 1 has already... The second flower disc hole 2-1 is completely sealed. With continued rotation, the slider through-hole 3 intersects with the second flower disc hole 2-1, and the gap between the intersecting holes increases. The filter element installed on the second flower disc hole 2-1 enters the cleaning state. At this time, the first flower disc hole 2-1 partially corresponds to the slider through-hole 3, and the remaining part is sealed by the outer edge of the substrate 1. The filter element installed on the first flower disc hole 2-1 remains in the cleaning state. With continued rotation, the sealing slider 4 gradually moves away from the first flower disc hole 2-1. When the outer edge of the substrate 1 can no longer completely cover the first flower disc hole 2-1, the filter element installed on the first flower disc hole 2-1 enters the filtering state. This cycle continues until the sealing slider 4 rotates one revolution, at which point the backwashing ends. The backwash valve then closes, and the drive device stops working.

[0063] After prolonged operation, the substrate 1 will wear out. At this time, the tension spring 7 can play an elastic pressing role, effectively ensuring the sealing between the substrate 1 and the flower plate 2.

[0064] The flower plate 2 sealing device provided by this utility model effectively prevents a semi-sealed state during the cleaning process by setting the substrate 1 to an elongated ellipse shape. That is, the filter element being cleaned is both filtering the raw water and being backwashed, which greatly improves the cleaning effect of the filter element.

[0065] In the above process, since multiple grooves 1-2 are opened on the surface of the substrate 1 to accommodate the tiny sand and gravel present in the seawater, when the substrate 1 encounters sand and gravel while rotating along the bottom surface of the flower plate 2, it will rotate with the sand and gravel, and most of the sand and gravel will enter the grooves 1-2 in sequence, thus no longer abrading the substrate 1. This utility model reduces the problem of uneven sealing surface 1-1 caused by abrasion of the substrate 1, thereby ensuring the sealing performance of the substrate 1.

[0066] After cleaning, the sides of the grooves 1-2 are triangular or semi-circular, making it easier to clean the sand and gravel inside later.

[0067] like Figure 11As shown, the slider through-hole 3 and sealing slider 4 were previously located at the center of the substrate 1. We optimized the positions of the slider through-hole 3 and sealing slider 4 by moving them to the center of gravity of the substrate 1. Therefore, the connection between the sealing slider 4 and the substrate 1 is itself a stable and balanced structure, avoiding the problem of unstable center of gravity and further ensuring the sealing performance of the substrate 1. By setting the grooves 1-2 as a combination of annular and arc-shaped, it is convenient to collect sand and gravel around the slider through-hole 3 and other parts. By setting the grooves 1-2 in a cross shape, it is convenient to collect both horizontal and vertical sand and gravel. This structure has a better sand and gravel collection effect. By setting the grooves 1-2, the weight of the substrate 1 is reduced, avoiding the problem of unstable center of gravity during rotation caused by the substrate 1 being too heavy and the sealing slider 4 not being at the center of gravity of the substrate 1.

[0068] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A disc sealing structure for filter backflushing, comprising a substrate, characterized in that: The surface of the substrate that abuts and seals against the flower plate is the sealing surface. The sealing surface is provided with a number of grooves that are recessed into the sealing surface. The grooves are not connected to the through holes of the slider on the substrate, and / or the grooves are at a distance from the edge of the substrate.

2. The filter backwashing disc sealing structure according to claim 1, characterized in that: The groove may be annular, arc-shaped, straight, V-shaped, or a combination of the above shapes.

3. The disc sealing structure for filter backflushing according to claim 1, characterized in that: The groove is a combination of annular and arc-shaped. The annular groove surrounds the outer periphery of the flower plate hole, and the arc-shaped groove is evenly distributed on both sides of the slider through hole in the length direction of the substrate, and the inner edge of the arc-shaped groove faces the direction of the flower plate hole; or multiple straight grooves are arranged in a cross shape on the sealing surface.

4. A filter backwashing disc sealing structure according to claim 1 or 2, characterized in that: Several of the grooves are arranged intersecting or parallel on the sealing surface.

5. A filter backwashing disc sealing structure according to any one of claims 1-3, characterized in that: The sides of the groove are square, triangular, or semi-circular.

6. The disc sealing structure for filter backflushing according to claim 5, characterized in that: The height of the groove is between 0.5cm and 2cm; the distance from the bottom surface of the substrate is between 0.5cm and 2cm. The distance between the groove and the through hole of the slider is ≥3cm; the distance between the groove and the edge of the substrate is ≥3cm.

7. A filter backwashing disc sealing structure according to any one of claims 1-3, characterized in that: The substrate is an arc-shaped ellipse, and the substrate can completely cover two adjacent flower disc holes on the same circumference but cannot completely cover three adjacent flower disc holes on the same circumference.

8. The filter backwashing disc sealing structure according to claim 7, characterized in that: The concave side of the arc-shaped sides of the substrate is a concave surface, and the convex side is a convex surface. The slider through hole on the substrate is located at the center of gravity of the substrate. That is, after the substrate is symmetrically folded, the center point of the slider through hole is located on the straight line after folding, and the distance of the slider through hole from the concave surface is greater than the distance from the convex surface.

9. The disc sealing structure for filter backflushing according to claim 8, characterized in that: The filter backwashing disc sealing structure also includes a sealing slider and a rotating column that can drive the sealing slider to rotate. The cylindrical sealing slider is fixed on the bottom surface of the substrate and located on the outer circumferential surface of the slider through hole. The sealing slider has two elongated holes symmetrically arranged in the circumferential direction. The rotating column has two positioning holes corresponding to the positions of the elongated holes. The sealing slider extends into the rotating column and is limited by pins passing through the positioning holes and elongated holes to limit the up and down sliding of the sealing slider.

10. A disc sealing structure for filter backflushing according to claim 9, characterized in that: A tension spring is provided between the rotating column and the sealing slider. One end of the tension spring is fixedly connected to the bottom surface of the substrate, and the other end is fixedly connected to the outer wall of the sealing slider. The elasticity of the tension spring makes the substrate press tightly against the bottom surface of the flower plate. The sealing slider is provided with an annular groove in the circumference, and an O-ring is provided in the annular groove; The sealing slider is made of wear-resistant and corrosion-resistant materials, including polytetrafluoroethylene.

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