Self-cleaning filter and filtering method

Abstract

The present invention discloses a self-cleaning filter and a filtering method, and belongs to the technical field of filtering solid impurities in liquids. The self-cleaning filter of the present invention comprises a housing and a filter frame vertically installed in the housing, and also comprises a brush and a rotating shaft vertically installed in the filter frame. The rotating shaft is connected to the back of the brush in a floating manner, and the front bristles of the brush are attached to the inner wall of the filter frame. The gap between the brush and the inner wall of the filter frame is automatically adjusted through the floating connection, so that the brush can adapt to the deformation of the inner wall of the filter frame to achieve a better cleaning effect. The technical problem that the gap is too small to cause motor overload and the gap is too large to lose the cleaning function in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of filtering solid impurities in liquid, and more specifically to a self-cleaning filter and a filtering method. Background Art

[0002] The self-cleaning filter used by existing papermaking enterprises, when the pressure difference between the inlet and outlet is too large, the drain valve opens, and the reduction motor drives the brush to clean the dirt on the inner wall of the filter frame. The brush is fixedly installed on the main shaft. If the gap between the brush and the inner wall of the filter frame is adjusted too small, the motor will be overloaded. If the gap is too large, the self-cleaning function will be lost. In addition, the reduction motor needs to be configured, resulting in cable costs and power consumption; the motor and the matching reduction mechanism also increase the size of the entire equipment and the difficulty of maintenance. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In view of the above-mentioned defects of the self-cleaning filter in the prior art, the present invention provides a self-cleaning filter and a filtering method, which changes the installation method of the brush from a fixed connection to a floating connection, and automatically adjusts the gap between the brush and the inner wall of the filter frame to achieve a better cleaning effect.

[0005] 2. Technical solution

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] A self-cleaning filter comprises a shell and a filter frame vertically installed in the shell, and also comprises a brush and a rotating shaft vertically installed in the filter frame. The rotating shaft is floatingly connected to the back side of the brush, and the front bristles of the brush fit against the inner wall of the filter frame. The gap between the brush and the inner wall of the filter frame is automatically adjusted through the floating connection, so that the brush can adapt to the deformation of the inner wall of the filter frame, thereby solving the problem of motor overload caused by too small a gap and loss of cleaning function caused by too large a gap, thereby achieving a better cleaning effect.

[0008] A further technical solution is that the rotating shaft and the back side of the brush are floatingly connected through a floating frame; the floating frame includes a semicircular ring plate and an ear plate symmetrically radially connected to the axial surface of the rotating shaft, the free end of the ear plate is provided with a waist-shaped hole to produce a movable adjustment margin, and the connecting ends of the two symmetrical semicircular ring plates are hinged to the waist-shaped hole; the back side of the brush is connected to the outer ring surface of the semicircular ring plate, and the inner ring surface of the semicircular ring plate is pressed against the axial surface of the rotating shaft by a compression spring, and the compression spring is usually a cylindrical compression spring, and floating is achieved by the up and down vibration of the cylindrical compression spring, and the floating frame and the compression spring cooperate with each other to achieve automatic adjustment of the gap between the brush and the inner wall of the filter frame.

[0009] A further technical solution is that the two floating frames are arranged at the upper and lower parts of the rotating shaft, and the two floating frames are connected by two vertically symmetrical pull rods. Both ends of the pull rods are hinged to the waist-shaped holes to limit the upper and lower axial displacement of the floating frames and stabilize the brushing surface.

[0010] According to a further technical solution, an annular convexity is arranged on the inner annular surface of the semicircular ring plate, an ear shaft is arranged on the axial surface of the rotating shaft corresponding to the annular convexity, and both ends of the compression spring are sleeved on the annular convexity and the ear shaft to limit the displacement of the compression spring.

[0011] According to a further technical solution, the rotating shaft is connected to the output end of the reducer through a coupling, and the shaft diameter of the rotating shaft is larger than the shaft body of the coupling, thereby improving the washing stability of the brush.

[0012] A further technical solution is that the reducer is a turbine worm reducer, the shell is externally connected to a sewage pipe and a sewage valve, the sewage valve outlet is connected to a hydraulic motor, and the output shaft of the hydraulic motor is connected to the input end of the turbine worm reducer. When the pressure difference between the inside and outside of the filter frame increases, the sewage valve opens, and the high-pressure water flow drives the hydraulic motor to rotate. The power is transmitted to the rotating shaft through the reducer, driving the brush to rotate around the inner wall of the filter frame. The sewage pressure is used to drive the hydraulic motor, and no external power supply is required, thereby reducing energy consumption.

[0013] 3. Beneficial effects

[0014] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0015] The self-cleaning filter of the present invention has a floating brush structure that adapts to the inner wall of the filter frame, avoiding the problem of gap adjustment; the sewage pressure is used to drive the hydraulic motor, and no external power supply is required, which reduces energy consumption. There is no need to add additional motors and cables, and there is no additional power drive, which reduces the size of the equipment and maintenance costs; it solves the problems of high energy consumption and unstable cleaning effect of the self-cleaning filter in the prior art; the entire device has a simple structure, is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a self-cleaning filter in a specific embodiment;

[0017] Figure 2 for Figure 1 Schematic diagram of the middle floating frame after enlargement;

[0018] Figure 3 for Figure 1 AA-axis top view;

[0019] Figure 4 It is a schematic diagram of the position of the waist-shaped hole in a specific embodiment;

[0020] Figure 5 for Figure 3 Schematic diagram of the enlarged part B in the middle.

[0021] In the figure: 1-housing; 2-filter frame; 4-brush; 5-rotating shaft; 6-pull rod; 7-floating frame; 8-compression spring; 12-coupling; 13-reducer; 16-hydraulic motor; 17-drain valve; 51-ear shaft; 71-semicircular ring plate; 72-ear plate; 73-waist-shaped hole; 711-annular convexity. DETAILED DESCRIPTION

[0022] In order to further understand the content of the present invention, the invention is described in detail with reference to the accompanying drawings.

[0023] Example 1

[0024] The self-cleaning filter of this embodiment, such as Figure 1 As shown, it includes a housing 1, a brush 4, and a filter frame 2 and a rotating shaft 5 vertically installed in the housing 1. The rotating shaft 5 is connected to the back of the brush 4 in a floating manner through a floating frame 7. The front bristles of the brush 4 are attached to the inner wall of the filter frame 2. The gap between the brush 4 and the inner wall of the filter frame 2 is automatically adjusted through the floating connection, so that the brush 4 can adapt to the deformation of the inner wall of the filter frame 2, and the floating elastic brush can better clean the dirt on the inner wall of the filter frame 2; Figure 2 , 3 As shown, the floating frame 7 includes a semicircular ring plate 71 and an ear plate 72 symmetrically connected to the axial surface of the rotating shaft 5 in a radial direction. Figure 4 As shown, a waist-shaped hole 73 is provided at the free end of the ear plate 72, and a waist-shaped hole is also provided at the connecting end of the corresponding semicircular ring plate 71, so as to produce a lateral movable adjustment margin, and the connecting ends of the two symmetrical semicircular ring plates 71 are hinged to the waist-shaped hole 73; the back of the brush 4 is connected to the outer ring surface of the semicircular ring plate 71, and the inner ring surface of the semicircular ring plate 71 is pressed against the axial surface of the rotating shaft 5 by the compression spring 8, so that the floating of the brush 4 is realized by the up and down vibration of the compression spring 8.

[0025] In the self-cleaning filter of this embodiment, the floating frame 7 and the compression spring 8 cooperate with each other to realize the automatic adjustment of the gap between the brush 4 and the inner wall of the filter frame 2, thereby solving the problem of motor overload caused by too small a gap and loss of cleaning function caused by too large a gap, thereby achieving a better cleaning effect.

[0026] Example 2

[0027] The basic structure of the self-cleaning filter of this embodiment is the same as that of embodiment 1, except that: Figure 1 , 2 As shown, the floating racks 7 are two arranged at the upper and lower parts of the rotating shaft 5, and the two floating racks 7 are connected by two vertically symmetrical pull rods 6, both ends of which are hinged to the waist-shaped holes 73, limiting the vertical axial displacement of the floating racks 7 and stabilizing the brush 4 to brush the surface. Figure 3 , 5As shown, the inner ring surface of the semicircular ring plate 71 is provided with an annular protrusion 711, and the axial surface of the rotating shaft 5 corresponding to the annular protrusion 711 is provided with an ear shaft 51, and the two ends of the compression spring 8 are respectively tightly sleeved on the annular protrusion 711 and the ear shaft 51 to limit the displacement of the compression spring 8. The rotating shaft 5 is connected to the output end of the reducer 13 through the coupling 12, and the shaft diameter of the rotating shaft 5 is larger than the shaft body of the coupling 12, so as to improve the washing stability of the brush 4.

[0028] Example 3

[0029] The basic structure of the self-cleaning filter of this embodiment is the same as that of embodiment 2, except that: Figure 1 As shown, the compression spring 8 is a cylindrical compression spring, and the floating of the brush 4 is achieved by the up and down vibration of the cylindrical compression spring; a gap is reserved between the annular protrusion 711 and the ear shaft 51, and the size of the gap is between 1 / 3 and 1 / 2 of the length of the cylindrical compression spring. The two ends of the cylindrical compression spring are respectively tightly mounted on the annular protrusion 711 and the ear shaft 51, so that the vibration drives the brush 4 to increase the up and down floating space while avoiding dislocation of the cylindrical compression spring.

[0030] The reducer 13 is a worm gear reducer, the housing 1 is externally connected to a sewage pipe and a sewage valve 17, the outlet of the sewage valve 17 is connected to a hydraulic motor 16, and the output shaft of the hydraulic motor 16 is connected to the input end of the worm gear reducer. When the pressure difference between the inside and outside of the filter frame 2 increases, the sewage valve 17 opens, and the high-pressure water flow drives the hydraulic motor 16 to rotate, and the power is transmitted to the rotating shaft 5 through the reducer 13, driving the brush 4 to rotate around the inner wall of the filter frame 2, and the sewage pressure is used to drive the hydraulic motor 16. The use of the hydraulic motor 16 instead of the motor does not require an external power supply, thereby reducing energy consumption, and does not require additional motors and cables. There is no additional power drive, which reduces the equipment size and maintenance costs.

[0031] In the self-cleaning filter of this embodiment, when the pressure difference between the inlet and outlet of the housing 1 is too large, the drain valve 17 is opened, and the high-pressure water flow drives the hydraulic motor 16 to rotate, and transmits power to the rotating shaft 5 through the reducer 13, driving the brush 4 to rotate around the inner wall of the filter frame 2. The cooperation between the floating frame 7 and the compression spring 8 enables the brush 4 to automatically adapt to the deformation of the inner wall of the filter frame 2, ensuring that the bristles fit tightly and achieve efficient cleaning.

[0032] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure and manufacturing steps are not limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the invention, designs a structure and an implementation method similar to the technical solution without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A self-cleaning filter, comprising a housing (1) and a filter frame (2) vertically mounted in the housing (1), characterized in that: It also comprises a brush (4) and a rotating shaft (5) vertically installed in the filter frame (2); the rotating shaft (5) is floatingly connected to the back side of the brush (4); and the front bristles of the brush (4) are attached to the inner wall of the filter frame (2).

2. The self-cleaning filter according to claim 1, characterized in that: The rotating shaft (5) and the back side of the brush (4) are floatingly connected via a floating frame (7); the floating frame (7) comprises a semicircular ring plate (71) and an ear plate (72) symmetrically radially connected to the axial surface of the rotating shaft (5); a waist-shaped hole (73) is arranged at the free end of the ear plate (72); the connecting ends of the two symmetrical semicircular ring plates (71) are hinged to the waist-shaped hole (73); the back side of the brush (4) is connected to the outer ring surface of the semicircular ring plate (71), and the inner ring surface of the semicircular ring plate (71) is pressed against the axial surface of the rotating shaft (5) via a compression spring (8).

3. The self-cleaning filter according to claim 2, characterized in that: The two floating frames (7) are arranged at the upper and lower parts of the rotating shaft (5), and the two floating frames (7) are connected by two vertically symmetrical pull rods (6), and both ends of the pull rods (6) are hinged to the waist-shaped holes (73).

4. The self-cleaning filter according to claim 2, characterized in that: The inner ring surface of the semicircular ring plate (71) is provided with an annular protrusion (711), the axial surface of the rotating shaft (5) corresponding to the annular protrusion (711) is provided with an ear shaft (51), and the two ends of the compression spring (8) are sleeved on the annular protrusion (711) and the ear shaft (51).

5. The self-cleaning filter according to claim 2, characterized in that: The rotating shaft (5) is connected to the output end of the reducer (13) via a coupling (12), and the shaft diameter of the rotating shaft (5) is larger than the shaft body of the coupling (12).

6. The self-cleaning filter according to claim 5, characterized in that: The reducer (13) is a worm gear reducer, the housing (1) is externally connected to a sewage pipe and a sewage valve (17), the sewage valve (17) outlet is connected to a hydraulic motor (16), and the output shaft of the hydraulic motor (16) is connected to the input end of the worm gear reducer.

7. The filtering method of the self-cleaning filter according to claim 6, characterized in that: When the pressure difference between the inlet and outlet of the housing (1) is too large, the drain valve (17) opens, the high-pressure water flow drives the hydraulic motor (16) to rotate, and the power is transmitted to the rotating shaft (5) through the turbine worm reducer, driving the brush (4) to rotate around the inner wall of the filter frame (2).

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