Self-cleaning filter

Abstract

The utility model discloses a self-cleaning filter and belongs to the technical field of filtration of solid impurities in liquid. The self-cleaning filter comprises a shell and a filter frame vertically installed in the shell, and further comprises a brush and a rotating shaft vertically installed in the filter frame, the rotating shaft is in floating connection with the back face of the brush, bristles on the front face of the brush are attached to the inner wall of the filter frame, and the gap between the brush and the inner wall of the filter frame is automatically adjusted through floating connection. The brush is self-adaptive to deformation of the inner wall of the filter frame, and a better cleaning effect is achieved. The technical problems that in the prior art, a gap is too small to cause motor overload and the gap is too large to lose the cleaning function are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of solid impurity filtering in liquid, more particularly to a self-cleaning filter. BACKGROUND

[0002] The self-cleaning filter used in the existing papermaking enterprises opens the blowdown valve when the pressure difference between the inlet and outlet is too large, and the speed reducer 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, and if the gap is too large, the self-cleaning function will be lost. SUMMARY

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

[0004] In view of the above defects of the self-cleaning filter in the prior art, the utility model provides a self-cleaning filter, which changes the fixed connection of the brush to floating connection, automatically adjusts the gap between the brush and the inner wall of the filter frame, and achieves better cleaning effect.

[0005] 2. Technical scheme

[0006] To achieve the above purpose, the utility model provides the technical scheme as follows:

[0007] A self-cleaning filter, comprising a shell and a filter frame vertically installed in the shell, further comprising a brush and a rotating shaft vertically installed in the filter frame, the rotating shaft is floatingly connected with the back surface of the brush, the front surface of the brush is 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 floating connection, the brush self-adapts to the deformation of the inner wall of the filter frame, the problems of motor overload caused by too small gap and loss of cleaning function caused by too large gap are solved, and better cleaning effect is achieved.

[0008] Further technical scheme, the rotating shaft is floatingly connected with the back surface of the brush through a floating frame; the floating frame comprises a semicircular ring plate and a symmetrical ear plate connected to the shaft surface of the rotating shaft in a radial direction, the free end of the ear plate is provided with a waist-shaped hole to generate an active adjustment allowance, and the connecting end of the two symmetrical semicircular ring plates is hinged to the waist-shaped hole; the back surface 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 shaft surface of the rotating shaft through a compression spring, the compression spring is usually a cylindrical compression spring, and the up-down oscillation of the cylindrical compression spring realizes floating, and the floating frame and the compression spring cooperate to realize automatic adjustment of the gap between the brush and the inner wall of the filter frame.

[0009] Further technical scheme, the floating frame is provided at the upper and lower parts of the rotating shaft, and the two floating frames are connected through two vertically symmetrical pull rods, the two ends of the pull rod are hinged to the waist-shaped hole, the up-down axial displacement of the floating frame is limited, and the brush washing surface is stabilized.

[0010] Further, the inner ring surface of the semi-circular ring plate is provided with a ring convex, the shaft surface of the rotating shaft corresponding to the ring convex is provided with an ear shaft, and the two ends of the compression spring are sleeved on the ring convex and the ear shaft to limit the deviation of the compression spring.

[0011] Further, the rotating shaft is connected with the output end of the speed reducer through a shaft coupling, and the shaft diameter of the rotating shaft is larger than the shaft body of the shaft coupling, so that the washing stability of the brush is improved.

[0012] Further, the speed reducer is a worm-turbine speed reducer, the shell is externally connected with a blowdown pipeline and a blowdown valve, the outlet of the blowdown valve is connected with a hydraulic motor, the output shaft of the hydraulic motor is connected with the input end of the worm-turbine speed reducer, when the pressure difference between the inside and outside of the filter frame increases, the blowdown valve is opened, the high-pressure water flow drives the hydraulic motor to rotate, the power is transmitted to the rotating shaft through the speed reducer, the brush is driven to rotate around the inner wall of the filter frame, and the hydraulic motor is driven by the blowdown pressure, so that an external power supply is not needed, and energy consumption is reduced.

[0013] 3. Beneficial effects

[0014] Compared with the prior art, the technical scheme has the following beneficial effects:

[0015] The self-cleaning filter has the following beneficial effects: the floating brush structure is self-adaptive to the inner wall of the filter frame, the gap adjustment problem is avoided; the hydraulic motor is driven by the blowdown pressure, so that an external power supply is not needed, energy consumption is reduced, a motor and a cable are not needed to be additionally increased, the equipment size and maintenance cost are reduced, the problems of high energy consumption and unstable cleaning effect of the self-cleaning filter in the prior art are solved, and the whole device has simple structure, energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic view of the self-cleaning filter of the embodiment;

[0017] Figure 2 is Figure 1 is an enlarged view of the floating frame;

[0018] Figure 3 is Figure 1 is a top view of A-A direction of the embodiment;

[0019] Figure 4 is a position schematic view of the waist-shaped hole of the embodiment;

[0020] Figure 5 is Figure 3 is an enlarged view of B part.

[0021] In the diagram: 1-shell; 2-filter frame; 4-brush; 5-shaft; 6-pull rod; 7-floating frame; 8-compression spring; 12-coupling; 13-reducer; 16-hydraulic motor; 17-drain valve; 51-trunnion; 71-semi-circular ring plate; 72-ear plate; 73-waist-shaped hole; 711-ring protrusion. Detailed Implementation

[0022] To further understand the contents of this utility model, a detailed description of the utility model is provided in conjunction with the accompanying drawings.

[0023] Example 1

[0024] The self-cleaning filter in this embodiment, such as Figure 1 As shown, the device includes a housing 1, a brush 4, a filter frame 2 vertically installed inside the housing 1, and a rotating shaft 5. The rotating shaft 5 is floatingly connected to the back of the brush 4 via a floating frame 7. The bristles on the front of the brush 4 are in contact with the inner wall of the filter frame 2. The floating connection automatically adjusts the gap between the brush 4 and the inner wall of the filter frame 2, allowing the brush 4 to adapt to the deformation of the inner wall of the filter frame 2. The floating, elastic brush better cleans the dirt on the inner wall of the filter frame 2. Figure 2 , 3 As shown, the floating frame 7 includes a semi-circular ring plate 71 and symmetrically radially connected ear plates 72 to the axial surface of the rotating shaft 5, as... Figure 4 As shown, the free end of the ear plate 72 is provided with a waist-shaped hole 73, and the connecting end of the corresponding semi-circular ring plate 71 is also provided with a waist-shaped hole, which generates a lateral movement adjustment margin. The connecting ends of the two symmetrical semi-circular 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 semi-circular ring plate 71, and the inner ring surface of the semi-circular ring plate 71 is pressed against the axial surface of the rotating shaft 5 by the compression spring 8. The compression spring 8 is usually a cylindrical compression spring, and floating is achieved by the up and down vibration of the cylindrical compression spring.

[0025] In this embodiment, the self-cleaning filter uses a floating frame 7 and a compression spring 8 in synergy to automatically adjust the gap between the brush 4 and the inner wall of the filter frame 2. This solves the problems of motor overload caused by too small a gap and loss of cleaning function due to too large a gap, thus achieving a better cleaning effect.

[0026] Example 2

[0027] The self-cleaning filter in this embodiment has the same basic structure as in Embodiment 1, but the differences or improvements are as follows: Figure 1 , 2 As shown, there are two floating frames 7 located at the top and bottom of the rotating shaft 5. The two floating frames 7 are connected by two vertically symmetrical tie rods 6. Both ends of the tie rods 6 are hinged to the oblong holes 73, which restricts the vertical axial displacement of the floating frames 7 and stabilizes the brush 4 for washing the surface. Figure 3 , 5As shown, the inner annular surface of the semi-circular ring plate 71 is provided with a ring protrusion 711, and the shaft surface of the rotating shaft 5 corresponding to the ring protrusion 711 is provided with an ear shaft 51, and the two ends of the compression spring 8 are sleeved on the ring protrusion 711 and the ear shaft 51 to limit the deviation of the compression spring 8. The rotating shaft 5 is connected with the output end of the speed reducer 13 through the shaft coupling 12, and the shaft diameter of the rotating shaft 5 is larger than the shaft body of the shaft coupling 12, so as to improve the washing stability of the brush 4.

[0028] Embodiment 3

[0029] The self-cleaning filter of the embodiment has the same basic structure as that of Embodiment 2, and is different or improved in that Figure 1 As shown, the speed reducer 13 is a turbine worm speed reducer, the shell 1 is externally connected with a blowdown pipeline and a blowdown valve 17, the blowdown valve 17 is connected with the water motor 16 at the outlet, the output shaft of the water motor 16 is connected with the input end of the turbine worm speed reducer, when the pressure difference between the inside and outside of the filter frame 2 increases, the blowdown valve 17 is opened, the high-pressure water flow drives the water motor 16 to rotate, and the power is transmitted to the rotating shaft 5 through the speed reducer 13, so as to drive the brush 4 to rotate around the inner wall of the filter frame 2. The water motor 16 is driven by the blowdown pressure, and the water motor 16 is used instead of the motor, so that the external power supply is not needed, and the energy consumption is reduced.

[0030] When the pressure difference between the inlet and outlet of the shell 1 is too large, the blowdown valve 17 is opened, the high-pressure water flow drives the water motor 16 to rotate, and the power is transmitted to the rotating shaft 5 through the speed reducer 13, so as to drive the brush 4 to rotate around the inner wall of the filter frame 2. The cooperation of the floating frame 7 and the compression spring 8 makes the brush 4 automatically adapt to the deformation of the inner wall of the filter frame 2, ensures that the bristles are tightly attached, and realizes efficient cleaning.

[0031] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the drawings only show one of the embodiments of the utility model, and the actual structure and manufacturing steps are not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the purpose of the invention, similar structural modes and embodiments can be designed without creativity, which should all belong to the protection scope of the utility model.

Claims

1. A self-cleaning filter comprising a housing (1) and a filter frame (2) vertically mounted in the housing (1), characterized in that: The filter frame (2) is provided with a brush (4) and a rotating shaft (5) vertically installed in the filter frame (2), the rotating shaft (5) is floatingly connected with the back 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 of claim 1, wherein: The back of the brush (4) is floatingly connected with the rotating shaft (5) through a floating frame (7); the floating frame (7) comprises a semicircular ring plate (71) and an ear plate (72) symmetrically connected to the shaft surface of the rotating shaft (5) in a radial direction, the free end of the ear plate (72) is provided with a waist-shaped hole (73), the connecting end of the two symmetrical semicircular ring plates (71) is 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 shaft surface of the rotating shaft (5) through a compression spring (8).

3. The self-cleaning filter of claim 2, wherein: The floating frame (7) is arranged at the upper and lower parts of the rotating shaft (5), and the two floating frames (7) are connected through two vertically symmetrical pull rods (6), the two ends of the pull rod (6) are hinged to the waist-shaped hole (73).

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

5. The self-cleaning filter of claim 2, wherein: The rotating shaft (5) is connected with the output end of a speed reducer (13) through a shaft coupling (12), and the shaft diameter of the rotating shaft (5) is greater than the shaft body of the shaft coupling (12).

6. The self-cleaning filter of claim 5, wherein: The speed reducer (13) is a worm-turbine speed reducer, the shell (1) is externally connected with a blowdown pipeline and a blowdown valve (17), the outlet of the blowdown valve (17) is connected with a hydraulic motor (16), and the output shaft of the hydraulic motor (16) is connected with the input end of the worm-turbine speed reducer.

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