Pre-filter with anti-blocking structure

Abstract

The utility model relates to the technical field of pre-filters, in particular to a pre-filter with an anti-blocking structure, which comprises a filter shell, a water inlet pipe, a flushing branch pipe, a water outlet pipe, a blow-off pipe and a filter element, the bottom end of the filter element is mounted on the inner surface of a detachable sleeve shell, and a rubber ring piece is movably sleeved on the surface of the filter element. A sealing rubber block adheres to the bottom of the rubber circular ring piece, and the bottom of the sealing rubber block is connected with a driving mechanism. According to the scheme, the rubber circular ring piece is arranged outside the filter element and is controlled by the driving motor and the ball screw to move on the outer surface of the filter element, so that in the moving process of the rubber circular ring piece, the rubber circular ring piece pushes large-particle substances attached to the outer surface of the filter element through friction force, and the large-particle substances move on the surface of the filter element after being stressed; due to the resistance of the water solution, the large-particle substances fall off from the filter element, so that the large-particle substances attached to the surface of the filter element can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-filters, in particular to a pre-filter with an anti-clogging structure. Background Art

[0002] The pre-filter is the first coarse filtration device for the water used in the whole house. It can filter out large particles such as mud, rust, insect eggs, bacteria and algae in tap water. The pre-filter is generally installed at the front end of the pipe. After the pre-filter is used for a long time, a large amount of large particles will adhere to its filter element. Therefore, the existing technology uses backwashing to clean the large particles on the surface of the filter element, and discharges the cleaned sewage mixed with large particles through the sewage pipe. The backwashing method can extend the service life of the filter element, but the water pressure in the household water pipe is limited, and can only wash away most of the large particles on the surface of the filter element. The large particles remaining on the surface of the filter element, especially the bacteria and algae, have strong adhesion and cannot be completely cleaned by ordinary flushing methods. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a pre-filter with an anti-clogging structure.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a pre-filter with an anti-clogging structure, comprising a filter housing, a water inlet pipe, a flushing branch pipe, a water outlet pipe, a sewage pipe and a filter element, the filter element being arranged inside the filter housing, the bottom end of the filter housing being provided with a first opening, the bottom end of the filter housing being threadedly mounted with a detachable sleeve, the top of the detachable sleeve being provided with a second opening, the second opening being connected to the first opening, the bottom end of the filter element being mounted on the inner surface of the detachable sleeve, the surface of the filter element being movably sleeved with a rubber ring, the bottom of the rubber ring being bonded with a sealing rubber block, the bottom of the sealing rubber block being connected to a driving mechanism.

[0005] Preferably, the driving mechanism includes two mounting rods, one end of the two mounting rods is installed at the bottom of the sealing rubber block, the other end of the two mounting rods passes through the bottom of the detachable sleeve and extends to the bottom thereof, a ball screw is provided between the two mounting rods, one end of the ball screw is movably installed at the bottom of the detachable sleeve, a connecting rod is installed between the movable end of the ball screw and the surface of the two mounting rods, and the bottom end of the ball screw is connected to the driving motor through a coupling.

[0006] Preferably, a second protective shell is threadedly installed on the bottom end of the detachable shell, the two mounting rods, two connecting rods and the ball screw are all located in the second protective shell, and the bottom of the second protective shell is connected to the bottom end of the ball screw through a bearing.

[0007] Preferably, the bottom end of the second protective shell is threadedly mounted with the first protective shell, and the drive motor is mounted inside the first protective shell.

[0008] Preferably, one end of the sewage pipe and the water inlet pipe are both installed through the bottom end of the filter housing, one end of the outlet pipe is installed through the top of the filter element, and the other end of the outlet pipe is installed through the top of the filter housing and extends to its outside, and a flushing branch pipe is connected between the water inlet pipe and the outlet pipe.

[0009] Preferably, the sewage pipe, water inlet pipe, water outlet pipe and flushing branch pipe are all provided with solenoid valves.

[0010] Preferably, a water flow detector is provided on the water outlet pipe.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This solution is achieved by arranging a rubber ring on the outside of the filter element. The rubber ring is controlled by a driving motor and a ball screw to move on the outer surface of the filter element. During the movement of the rubber ring, the rubber ring pushes the large particles attached to the outer surface of the filter element through friction. After being subjected to the force, the large particles move on the surface of the filter element, and due to the resistance of the aqueous solution, the large particles fall from the filter element, making it convenient to clean the large particles attached to the surface of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axonometric diagram of a pre-filter with an anti-clogging structure according to the present invention;

[0014] Figure 2 This is a cross-sectional view of a pre-filter with an anti-clogging structure according to the present invention;

[0015] Figure 3 This is a schematic diagram of the connection structure between a rubber ring component and a drive motor of a pre-filter with an anti-clogging structure according to the present invention.

[0016] In the figure: first protective shell 1, detachable shell 2, water inlet pipe 3, flushing branch pipe 4, water outlet pipe 5, filter housing 6, sewage pipe 7, second protective shell 8, sealing rubber block 9, rubber ring 10, mounting rod 11, ball screw 12, drive motor 13, filter element 14, connecting rod 15, water flow detector 16. DETAILED DESCRIPTION

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0018] like Figure 1-3 The pre-filter with an anti-clogging structure shown in the figure includes a filter housing 6, a water inlet pipe 3, a flushing branch pipe 4, a water outlet pipe 5, a sewage pipe 7 and a filter element 14. The filter element 14 is arranged inside the filter housing 6, and one end of the sewage pipe 7 and the water inlet pipe 3 are both installed through the bottom end of the filter housing 6, one end of the water outlet pipe 5 is installed through the top of the filter element 14, and the other end of the water outlet pipe 5 passes through the top of the filter housing 6 and extends to the outside thereof. A flushing branch pipe 4 is connected between the water inlet pipe 3 and the water outlet pipe 5. Solenoid valves are provided on the sewage pipe 7, the water inlet pipe 3, the water outlet pipe 5 and the flushing branch pipe 4. A water flow detector 16 is provided on the water outlet pipe 5. The water flow detector 16 detects Whether the clean water flow of the pre-filter is attenuated. If the clean water flow decreases below the threshold value of the water flow detector 16, the amount of large particles on the filter element 14 affects the normal operation of the aqueous solution filtration. At this time, the signal of the water flow detector 16 can be fed back to the controller. The controller controls the drive motor 13 and the solenoid valve of the sewage pipe 7, the solenoid valve of the water inlet pipe 3, and the solenoid valve of the water outlet pipe 5 to close, and then controls the solenoid valve of the flushing branch pipe 4 to open, so that the aqueous solution in the pipeline flows into the filter element 14 through the flushing branch pipe 4 and the water outlet pipe 5 in turn. The aqueous solution in the filter element 14 reversely flushes the filter element 14 and the large particles attached to its surface. The controller is a single-chip microcomputer or a PLC controller.

[0019] A first opening is provided at the bottom end of the filter housing 6, and a detachable sleeve 2 is threadedly installed at the bottom end of the filter housing 6. A second opening is provided at the top of the detachable sleeve 2, and the second opening is connected to the first opening. The bottom end of the filter element 14 is mounted on the inner surface of the detachable sleeve 2 by screws, and a rubber ring 10 is movably sleeved on the surface of the filter element 14. A sealing rubber block 9 is bonded to the bottom of the rubber ring 10, and a driving mechanism is connected to the bottom of the sealing rubber block 9. The driving mechanism includes two mounting rods 11, one end of the two mounting rods 11 is mounted on the bottom of the sealing rubber block 9 by screws, and the other end of the two mounting rods 11 passes through the bottom of the detachable sleeve 2 and extends below it. A movable rubber sealing ring is provided between the mounting rod 11 and the detachable sleeve 2 to facilitate the movement of the mounting rod 11 on the detachable sleeve 2, while maintaining the sealing of the connection between the mounting rod 11 and the detachable sleeve 2.

[0020] A ball screw 12 is provided between the two mounting rods 11. One end of the ball screw 12 is movably mounted on the bottom of the detachable housing 2. A connecting rod 15 is installed between the movable end of the ball screw 12 and the surface of the two mounting rods 11 by screws. The bottom end of the ball screw 12 is connected to a drive motor 13 through a coupling. When cleaning large particles attached to the outer surface of the filter element 14, the drive motor 13 is powered on to drive the ball screw 12 to rotate. At the same time, the nut of the ball screw 12 is rotated on the surface of the ball screw. The upward movement causes the nut of the ball screw 12 to drive the two mounting rods 11 to move synchronously through the two connecting rods 15. After the two connecting rods 15 are subjected to force, the rubber ring 10 is pushed to move on the outer surface of the filter element 14 through the sealing rubber block 9. The rubber ring 10 pushes the large particles attached to the outer surface of the filter element 14 through friction. The large particles move on the surface of the filter element 14 after being subjected to force, and due to the resistance of the aqueous solution, the large particles fall from the filter element 14, making it convenient to clean the large particles attached to the surface of the filter element.

[0021] The bottom end of the detachable shell 2 is threadedly installed with a second protective shell 8, and the two mounting rods 11, two connecting rods 15 and the ball screw 12 are all located in the second protective shell 8. The bottom of the second protective shell 8 is connected to the bottom end of the ball screw 12 through a bearing, and the bottom end of the second protective shell 8 is threadedly installed with a first protective shell 1, and the drive motor 13 is installed inside the first protective shell 1 by screws. The first protective shell 1 is used to protect the drive motor 13, and the second protective shell 8 protects the two mounting rods 11, two connecting rods 15 and the ball screw 12.

[0022] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-filter with an anti-clogging structure, comprising a filter housing (6), a water inlet pipe (3), a flushing branch pipe (4), a water outlet pipe (5), a sewage pipe (7) and a filter element (14), wherein the filter element (14) is arranged inside the filter housing (6), and is characterized in that: The bottom end of the filter housing (6) is provided with a first opening, the bottom end of the filter housing (6) is threadedly mounted with a detachable casing (2), the top of the detachable casing (2) is provided with a second opening, the second opening is communicated with the first opening, the bottom end of the filter element (14) is mounted on the inner surface of the detachable casing (2), the surface of the filter element (14) is movably sleeved with a rubber ring (10), the bottom of the rubber ring (10) is bonded with a sealing rubber block (9), and the bottom of the sealing rubber block (9) is connected to a driving mechanism.

2. The pre-filter with an anti-clogging structure according to claim 1, characterized in that: The driving mechanism comprises two mounting rods (11), one end of the two mounting rods (11) is mounted on the bottom of the sealing rubber block (9), the other end of the two mounting rods (11) passes through the bottom of the detachable casing (2) and extends below it, a ball screw (12) is provided between the two mounting rods (11), one end of the ball screw (12) is movably mounted on the bottom of the detachable casing (2), a connecting rod (15) is installed between the movable end of the ball screw (12) and the surface of the two mounting rods (11), and the bottom end of the ball screw (12) is connected to the driving motor (13) through a coupling.

3. The pre-filter with an anti-clogging structure according to claim 2, characterized in that: A second protective housing (8) is threadedly mounted on the bottom end of the detachable housing (2); the two mounting rods (11), the two connecting rods (15) and the ball screw (12) are all located in the second protective housing (8); and the bottom of the second protective housing (8) is connected to the bottom end of the ball screw (12) via a bearing.

4. The pre-filter with an anti-clogging structure according to claim 3, characterized in that: The first protective shell (1) is threadedly mounted on the bottom end of the second protective shell (8), and the drive motor (13) is mounted inside the first protective shell (1).

5. The pre-filter with an anti-clogging structure according to claim 1, characterized in that: One end of the sewage pipe (7) and the water inlet pipe (3) are both installed through the bottom end of the filter housing (6), one end of the water outlet pipe (5) is installed through the top of the filter element (14), and the other end of the water outlet pipe (5) is installed through the top of the filter housing (6) and extends to the outside thereof. A flushing branch pipe (4) is connected between the water inlet pipe (3) and the water outlet pipe (5).

6. The pre-filter with an anti-clogging structure according to claim 5, characterized in that: The sewage pipe (7), the water inlet pipe (3), the water outlet pipe (5) and the flushing branch pipe (4) are all provided with solenoid valves.

7. The pre-filter with an anti-clogging structure according to claim 5, characterized in that: The water outlet pipe (5) is provided with a water flow detector (16).

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