Filtering disc sealing device and disc filter element applying same

Abstract

The utility model discloses a filtering disc sealing device and a disc filter element applying the same, and relates to the technical field of filtering, the filtering disc sealing device comprises a first pressing disc, a second pressing disc, a jacking screw rod and a limiting piece, the first pressing disc and the second pressing disc are annular and are arranged on a filter element pressing part of the disc filter element in a sliding mode, and the jacking screw rod is arranged on the limiting piece. A threaded hole is formed in the first pressure plate, the jacking screw is in threaded connection with the threaded hole, the end, away from a rod head, of a rod body of the jacking screw abuts against the second pressure plate, the limiting piece is arranged on the side, away from the second pressure plate, of the first pressure plate, and the end, away from the first pressure plate, of the second pressure plate abuts against a filtering disc of the disc filter; according to the utility model, the jacking screw rod is screwed, the second pressure plate is extruded to move towards the filtering discs, and the plurality of filtering discs are extruded, so that the through holes are sealed by the filtering discs, the movement of the second pressure plate is linear movement, the filtering discs cannot be abraded due to rotary friction, and the service life of the filter element is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a filter disc sealing device and a disc filter element using the same. Background Art

[0002] Disc filter is a commonly used equipment in the field of filtration, which mainly includes a shell and a filter element. The structure of the filter element mainly includes a cylinder and a number of filter discs. The cylinder is provided with a number of through holes. Several filter discs are sleeved on the cylinder and block the through holes. A retaining ring is provided at the bottom of the cylinder, and a clamping piece is provided at the top. The plurality of filter discs are pressed against the retaining ring by the clamping piece to achieve sealing of the through holes by the filter discs. One end of the cylinder corresponding to the retaining ring is open, and the other end corresponding to the clamping piece is closed. In actual use, external liquid passes through the filter disc from the through hole into the cylinder to complete the filtration.

[0003] In the prior art, a spiral compression method is often used for the compression piece, that is, a thread is set on the outer peripheral wall of the sealing section of the cylinder, a threaded hole is set in the middle of the compression block, and the compression block is connected to the cylinder by a threaded connection. The position of the compression block can be adjusted by screwing the compression block, thereby achieving compression of the filter disc. However, during the compression process, since the compression block is in spiral motion, after it contacts the filter disc, it will rely on friction to drive the filter disc to rotate, causing wear of the filter disc and reducing the service life of the entire filter element.

[0004] Therefore, people are in urgent need of a filter disc sealing device that can increase the service life of the filter element. Summary of the invention

[0005] The purpose of the utility model is to provide a filter disc sealing device and a disc filter element using the same, so as to solve the problems existing in the above-mentioned prior art, and to drive the second pressure plate to move axially by a tightening screw to avoid wear of the filter disc, thereby increasing the service life of the filter element.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a filter disc sealing device, including a first pressure plate, a second pressure plate, a tightening screw and a limit piece, the first pressure plate and the second pressure plate are both annular, and the first pressure plate and the second pressure plate are slidably arranged on the filter element clamping part of the disc filter element, at least one threaded hole is opened on the first pressure plate, the tightening screw is threadedly connected with the threaded hole, the rod body of the tightening screw is away from the rod head. One end of the second pressure plate is abutted on the second pressure plate, and the limit piece is arranged on the side of the first pressure plate away from the second pressure plate, and one end of the second pressure plate away from the first pressure plate is abutted against the filter disc of the disc filter.

[0007] Preferably, the outer diameters of the first pressure plate and the second pressure plate are smaller than the outer diameter of the filter disc.

[0008] Preferably, a plurality of threaded holes are evenly arranged on the first pressure plate around its axis.

[0009] Preferably, the limiting member is a clamping ring, which includes two semi-circular ring structures, and the filter element pressing portion is provided with an annular embedding groove for the two semi-circular ring structures to be partially embedded.

[0010] The present invention also provides a disc filter element using the above-mentioned filter disc sealing device, comprising a filter cylinder, the filter disc, the cylindrical filter element pressing portion and the filter disc sealing device, the bottom of the filter cylinder is provided with an annular baffle, the top is provided with the filter pressing portion, the outer diameter of the annular baffle is larger than the outer diameter of the filter cylinder, a plurality of through holes connected to the inner cavity of the filter cylinder are axially provided on the outer peripheral wall of the filter cylinder, the inner diameter of the filter disc matches the outer diameter of the filter cylinder, and a plurality of the filter discs are stacked between the second pressure plate and the annular baffle.

[0011] Preferably, the annular baffle is integrally arranged with the filter cylinder.

[0012] Preferably, the end of the filter cylinder extends to form the filter element pressing portion, and a port sealing arrangement is provided for the filter element pressing portion.

[0013] Preferably, a plurality of strip-shaped grooves are axially arranged on the outer peripheral wall of the filter cylinder, and the through holes are arranged in the strip-shaped grooves.

[0014] Compared with the prior art, the utility model mainly achieves the following technical effects:

[0015] Since the limit member restricts the movement of the first pressure plate in the direction away from the second pressure plate, when the first pressure plate presses against the limit member, as the tightening screw is continuously turned, the end of the tightening screw continuously squeezes the second pressure plate, and the second pressure plate moves toward the filter disc to squeeze several filter discs, thereby completing the sealing of the filter disc to the through hole; during the overall movement process, the movement of the second pressure plate that is in direct contact with the filter disc is always linear motion, without rotational motion, and the filter disc will not be worn due to rotational friction, thereby increasing the service life of the filter disc and further increasing the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a schematic diagram of the structure of the filter disc sealing device of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the filter element of the disc filter of the utility model;

[0019] Figure 3 This is the front view of the filter element of the disc filter of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the filter cylinder of the utility model;

[0021] Among them, 1. the first pressure plate; 2. the second pressure plate; 3. the tightening screw; 4. the clamping ring; 5. the filter cylinder; 6. the filter disc; 7. the filter element pressing part; 8. the annular baffle; 9. the annular embedding groove; 10. the strip groove; 11. the through hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model aims to provide a filter disc sealing device and a disc filter element using the same, which drives the second pressure plate to move axially by a tightening screw to avoid wear of the filter disc and thus prolong the service life of the filter element.

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Please refer to Figures 1 to 4As shown, a filter disc sealing device is provided, including a first pressure plate 1, a second pressure plate 2, a tightening screw 3 and a limit piece. The first pressure plate 1 and the second pressure plate 2 are both annular, and the first pressure plate 1 and the second pressure plate 2 are slidably arranged on the filter element clamping part 7 of the disc filter element. Preferably, the inner holes of the first pressure plate 1 and the second pressure plate 2 are circular inner holes, and the inner diameters match the diameter of the cylindrical filter element clamping part 7 to avoid radial misalignment when sliding up and down. At least one threaded hole is opened on the first pressure plate 1, and the tightening screw 3 is threadedly connected to the threaded hole. The end of the rod body of the tightening screw 3 away from the rod head abuts against the second pressure plate 2, and the limit piece is arranged on the first pressure plate 1 away from the second On one side of the pressure plate 2, one end of the second pressure plate 2 away from the first pressure plate 1 is in contact with the filter disc 6 of the disc filter. The working method of the device is as follows: after the first pressure plate 1 presses against the limiter, as the tightening screw 3 is continuously turned, the end of the tightening screw 3 continuously squeezes the second pressure plate 2, and the second pressure plate 2 moves toward the filter disc 6 to squeeze a plurality of filter discs 6, thereby completing the sealing of the filter disc 6 to the through hole 11; during the overall movement process, the movement of the second pressure plate 2 in direct contact with the filter disc 6 is always a linear movement, without rotational movement, and the filter disc 6 will not be worn due to rotational friction, thereby increasing the service life of the filter disc 6 and further increasing the service life of the filter element.

[0026] The setting of the limiter can be designed based on the specific structure of the disc filter. For example, it can be directly fixed on the inner wall of the disc filter housing. It can be a plate-shaped structure, a block-shaped structure or a rod-shaped structure. The main purpose is to limit the movement of the first pressure plate 1 from the side away from the second pressure plate 2 after the filter element is installed; or the limiter can be directly detachably set on the filter element clamping part 7. The limiter can be a block-shaped structure, a rod-shaped structure, a plate-shaped structure or a clamping ring 4. When a block-shaped structure, a rod-shaped structure or a plate-shaped structure is selected, a hole can be opened on the filter element clamping part 7. A corresponding slot is provided, and a protruding plug block is provided on the limit piece. The limit piece is directly inserted into the slot through the plug block. When the first pressure plate 1 presses against the limit piece, the position of the limit piece can be fixed by relying on extrusion force and friction force. When a clamping ring 4 is selected, the clamping ring 4 includes two semi-circular ring structures with circular or square cross-sections. The two semi-circular ring structures are assembled into a complete annular structure. An annular embedding groove 9 for partially embedding the two semi-circular ring structures is provided on the filter element clamping part 7. The clamping ring 4 is partially embedded in the annular embedding groove 9 and partially exposed. The exposed part blocks the movement of the first pressure plate 1.

[0027] There is no restriction on the shape of the outer edges of the first pressure plate 1 and the second pressure plate 2, which can be circular or other polygonal shapes, but there needs to be an overlapping area with the filter disc 6 in the axial direction of the filter cylinder 5 to achieve the squeezing of the filter disc 6; when the first pressure plate 1 and the second pressure plate 2 with circular outer edges are selected, the outer diameters of the first pressure plate 1 and the second pressure plate 2 are smaller than the outer diameter of the filter disc 6; when the first pressure plate 1 and the second pressure plate 2 with polygonal outer edges are selected, the edges of the first pressure plate 1 and the second pressure plate 2 do not protrude from the outer edge of the filter disc 6 to minimize the space occupied.

[0028] In this embodiment, a plurality of threaded holes are evenly arranged on the first pressure plate 1 around its axis, so as to achieve even extrusion of the first pressure plate 1 at multiple positions.

[0029] The utility model also provides a disc filter element using the above-mentioned filter disc sealing device, comprising a filter cylinder 5, a filter disc 6, a cylindrical filter element pressing portion 7 and a filter disc 6 sealing device, an annular baffle 8 is provided at the bottom of the filter cylinder 5, and a filter pressing portion is provided at the top, the outer diameter of the annular baffle 8 is larger than the outer diameter of the filter cylinder 5, a plurality of through holes 11 connected to the inner cavity of the filter cylinder 5 are axially provided on the outer peripheral wall of the filter cylinder 5, the inner diameter of the filter disc 6 matches the outer diameter of the filter cylinder 5, and a plurality of filter discs 6 are stacked between the second pressure plate 2 and the annular baffle 8.

[0030] The annular baffle 8 is integrally arranged with the filter cylinder 5 to improve the structural strength.

[0031] In this embodiment, the end of the filter cylinder 5 extends to form a filter element clamping part 7, that is, the filter cylinder 5 and the filter clamping part are arranged integrally, the structural strength is high, and the port of the filter element clamping part 7 is sealed. Specifically, the sealing can be completed by setting a circular baffle and welding it to the port.

[0032] A plurality of strip grooves 10 are axially arranged on the outer peripheral wall of the filter cylinder 5 , and through holes 11 are arranged in the strip grooves 10 . The filtrate passing through the filter disc 6 first enters the strip grooves 10 and then is distributed to each through hole 11 .

[0033] During the actual installation process, a plurality of filter discs 6 are first sequentially mounted on the filter cylinder 5, and then the second pressure plate 2 and the first pressure plate 1 are sequentially mounted. After the mounting is completed, the clamping ring 4 and the tightening screw 3 are complete, and the tightening screw 3 is screwed until the second pressure plate 2 tightens the plurality of filter discs 6.

[0034] Adaptive changes made according to actual needs are all within the protection scope of this utility model.

[0035] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0036] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A filter disc sealing device, characterized in that: The filter element comprises a first pressure plate, a second pressure plate, a tightening screw and a limiting member, wherein the first pressure plate and the second pressure plate are both annular, and are slidably arranged on the filter element clamping portion of the disc filter element, and the first pressure plate is provided with at least one threaded hole, and the tightening screw is threadedly connected to the threaded hole, and the end of the rod body of the tightening screw away from the rod head abuts against the second pressure plate, and the limiting member is arranged on a side of the first pressure plate away from the second pressure plate, and the end of the second pressure plate away from the first pressure plate abuts against the filter disc of the disc filter.

2. The filter disc sealing device according to claim 1, characterized in that: The outer diameters of the first pressure plate and the second pressure plate are smaller than the outer diameter of the filter disc.

3. The filter disc sealing device according to claim 1, characterized in that: A plurality of threaded holes are evenly arranged on the first pressure plate around its axis.

4. The filter disc sealing device according to claim 1, characterized in that: The limiting member is a clamping ring, which includes two semicircular ring structures. The filter element pressing part is provided with an annular embedding groove for the two semicircular ring structures to be partially embedded.

5. A disc filter element using the filter disc sealing device according to any one of claims 1 to 4, characterized in that: It includes a filter cylinder, the filter disc, the cylindrical filter element pressing part and the filter disc sealing device, the bottom of the filter cylinder is provided with an annular baffle, the top is provided with the filter pressing part, the outer diameter of the annular baffle is larger than the outer diameter of the filter cylinder, the outer peripheral wall of the filter cylinder is axially provided with a plurality of through holes connected to the inner cavity of the filter cylinder, the inner diameter of the filter disc matches the outer diameter of the filter cylinder, and a plurality of the filter discs are stacked between the second pressure plate and the annular baffle.

6. The disc filter element according to claim 5, characterized in that: The annular baffle is integrally arranged with the filter cylinder.

7. The disc filter element according to claim 5, characterized in that: The end of the filter cylinder extends to form the filter element pressing portion, and a port of the filter element pressing portion is sealed.

8. The disc filter element according to claim 5, characterized in that: A plurality of strip grooves are arranged on the outer peripheral wall of the filter cylinder along the axial direction, and the through holes are arranged in the strip grooves.

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