A pre-filter device for a water pump

Abstract

The utility model discloses a kind of front filter devices for water pump, including self-cleaning filter cartridge, the one end of self-cleaning filter cartridge is connected with water inlet pipe, the other end of self-cleaning filter cartridge is connected with drain pipe, water inlet pipe is equipped with two-position three-way reversing solenoid valve one, two-position three-way reversing solenoid valve one is connected with the self-cleaning filter cartridge by flushing pipe, drain pipe is equipped with two-position three-way reversing solenoid valve two, two-position three-way reversing solenoid valve two is connected with the self-cleaning filter cartridge by slag discharge pipe, this kind of front filter device for water pump, the liquid transported by water pump can be early filtration treatment, avoid the impurity in liquid to block water pump, simultaneously, the utility model also has automatic, intelligent self-cleaning function, can automatically clean filter equipment, with the advantages of high efficiency, controllable, high flexibility, reduce water pump maintenance labor cost and time cost.

Description

Technical Field

[0001] This utility model relates to the field of water pumps, specifically a pre-filter device for water pumps. Background Technology

[0002] A water pump can transfer the mechanical energy of a prime mover or other external energy to a liquid, increasing the liquid's energy. It is mainly used to transport liquids including water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals. It can also transport liquid-gas mixtures and liquids containing suspended solids. It is a common type of mechanical equipment and is widely used in shipbuilding, oil extraction, heavy machinery, and agricultural irrigation.

[0003] When using a water pump to transport liquids containing impurities, pre-filtration is usually required to prevent impurities from accumulating, settling, and condensing, which could then clog the pump pipeline. For example, Chinese patent application number CN202421014707.3 describes a water pump for filtering sediment, comprising a pump body, characterized in that: a pump rotor is provided at the output end of the pump body, and a sediment filter assembly for filtering fine sediment is fixedly connected to the pump rotor; the sediment filter assembly is covered by an outer filter assembly for filtering coarse impurities. While this patent describes a water pump with filtration capabilities, in practical applications, after prolonged use, large particles of sediment can become trapped in the pores of the sediment filter assembly. This requires workers to disassemble, clean, and reinstall the sediment filter assembly using specialized tools, which is not only cumbersome and costly but also affects the normal operation of the water pump. Summary of the Invention

[0004] The purpose of this utility model is to provide a pre-filter for water pumps, in order to solve the problem mentioned in the background art that when existing water pumps are clogged, workers need to use professional tools to disassemble, clean and install the sediment filter components, which is not only cumbersome and costly, but also affects the normal use of the water pump.

[0005] The technical solution of this utility model is implemented as follows: A pre-filter for a water pump includes a self-cleaning filter cartridge. One end of the self-cleaning filter cartridge is connected to an inlet pipe, and the other end is connected to a drain pipe. A two-position three-way reversing solenoid valve is installed on the inlet pipe. The two-position three-way reversing solenoid valve is connected to the self-cleaning filter cartridge through a flushing pipe. A two-position three-way reversing solenoid valve is installed on the drain pipe. The two-position three-way reversing solenoid valve is connected to the self-cleaning filter cartridge through a slag discharge pipe. A slag filter is installed on the two-position three-way reversing solenoid valve. Both the two-position three-way reversing solenoid valve and the two-position three-way reversing solenoid valve are electrically connected to a single-chip microcomputer installed on the self-cleaning filter cartridge. The self-cleaning filter cartridge includes an outer shell, the interior of which is divided into a debris retention area and a clean water area by a filter screen. The debris retention area is connected to the water inlet pipe and the slag discharge pipe, and the clean water area and the flushing pipe are connected to the drain pipe.

[0006] Preferably, the microcontroller is fixedly connected to the self-cleaning filter cartridge by bolts, and the microcontroller is electrically connected to external power equipment.

[0007] Preferably, an inlet water pressure sensor is installed on the inlet pipe, and a drain water pressure sensor is installed on the drain pipe. Both the inlet water pressure sensor and the drain water pressure sensor are electrically connected to the microcontroller.

[0008] Preferably, the water inlet pipe is detachably and sealed to the self-cleaning filter cartridge via threads and a sealing gasket, and the filter screen is detachably screwed to the outer casing via a gasket.

[0009] Preferably, the filter screen is made of stainless steel.

[0010] Preferably, the slag discharge pipe is sealed to the outer casing, and the flushing pipe is sealed to the outer casing.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This pre-filter for water pumps can perform pre-filtration of the liquid transported by the pump, preventing impurities in the liquid from clogging the pump. In addition, this invention also has an automatic and intelligent self-cleaning function, which can automatically clean the filtration equipment. It has the advantages of high efficiency, controllability and flexibility, reducing the labor and time costs of water pump maintenance. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is the front view of the present invention; Figure 2 This is an internal structural view of the self-cleaning filter cartridge of this utility model.

[0014] The components include: 1. Inlet pipe; 2. Drain pipe; 3. Two-position three-way reversing solenoid valve one; 4. Flushing pipe; 5. Self-cleaning filter cartridge; 6. Microcontroller; 7. Inlet water pressure sensor; 8. Drain water pressure sensor; 9. Two-position three-way reversing solenoid valve two; 10. Filter cake; 11. Sludge discharge pipe; 501. Outer shell; 502. Filter screen; 503. Debris retention area; 504. Clean water area. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figures 1-2 A pre-filter for a water pump includes a self-cleaning filter cartridge 5. One end of the self-cleaning filter cartridge 5 is connected to an inlet pipe 1, and the other end is connected to a drain pipe 2. A two-position three-way reversing solenoid valve 3 is installed on the inlet pipe 1. The two-position three-way reversing solenoid valve 3 is connected to the self-cleaning filter cartridge 5 through a flushing pipe 4. A two-position three-way reversing solenoid valve 9 is installed on the drain pipe 2. The two-position three-way reversing solenoid valve 9 is connected to the self-cleaning filter cartridge 5 through a slag discharge pipe 11. A slag filter 10 is installed on the two-position three-way reversing solenoid valve 9. Both the two-position three-way reversing solenoid valve 3 and the two-position three-way reversing solenoid valve 9 are electrically connected to a microcontroller 6 installed on the self-cleaning filter cartridge 5. The self-cleaning filter cartridge 5 includes an outer shell 501. The interior of the outer shell 501 is divided into a debris retention area 503 and a clean water area 504 by a filter screen 502. The debris retention area 503 is connected to the water inlet pipe 1 and the slag discharge pipe 11. The clean water area 504 and the flushing pipe 4 are connected to the drain pipe 2.

[0017] See Figure 1 The microcontroller 6 is fixedly connected to the self-cleaning filter cartridge 5 by bolts. The microcontroller 6 is electrically connected to the external power equipment. This setting makes it convenient for the external power equipment to directly power the microcontroller 6 and various electronic components.

[0018] See Figure 1A water pressure sensor 7 is installed on the inlet pipe 1, and a water pressure sensor 8 is installed on the drain pipe 2. Both the inlet water pressure sensor 7 and the drain water pressure sensor 8 are electrically connected to the microcontroller 6. As the water pump continues to run, more and more impurities accumulate in the impurity retention area 503. The impurities clog the mesh of the filter screen 502, making it difficult for the liquid to flow through the filter screen 502. This causes the hydraulic pressure detected by the water pressure sensor 7 in the inlet pipe 1 on one side of the impurity retention area 503 to continuously increase. At the same time, because the liquid is unable to flow through the filter screen 502 into the clean water... In water zone 504, the hydraulic pressure detected by the drain end water pressure sensor 8 in the drain pipe 2 on one side of the clean water zone 504 continuously decreases. The detection results are fed back to the microcontroller 6 for processing through the inlet water pressure sensor 7 and the drain end water pressure sensor 8. When the difference between the detection results of the inlet water pressure sensor 7 and the drain end water pressure sensor 8 reaches the set parameter, the microcontroller 6 controls the two-position three-way reversing solenoid valve 3 and the two-position three-way reversing solenoid valve 9 to adjust the opening and closing of the pipeline and start the automatic cleaning function, which greatly improves the automation and intelligence of this device.

[0019] See Figure 1 and Figure 2 The water inlet pipe 1 is detachably sealed to the self-cleaning filter cartridge 5 via threads and a sealing gasket. The filter screen 502 is detachably screwed to the outer casing 501 via a gasket. This arrangement facilitates the replacement of the filter screen 502 when needed.

[0020] See Figure 2 The filter screen 502 is made of stainless steel, which can improve the service life of the filter screen 502.

[0021] See Figure 1 and Figure 2 The slag discharge pipe 11 is sealed to the outer casing 501, and the flushing pipe 4 is sealed to the outer casing 501. This arrangement can prevent leakage and improve the conveying power of the device.

[0022] Working Principle: When using this device, connect the inlet pipe 1 to the external water supply pipe and the drain pipe 2 to the water pump pipe. When the water pump supplies water normally, the microcontroller 6 controls the two-position three-way reversing solenoid valve 3 and the two-position three-way reversing solenoid valve 9 to adjust the opening and closing of the pipes, so that the flushing pipe 4 and the inlet pipe 1 are closed. The water pump drives the liquid to flow in the inlet pipe 1 and the drain pipe 2. When the liquid flows into the impurity retention area 503 through the inlet pipe 1, the liquid flows through the filter screen 502, and the liquid is filtered by the filter screen 502. The filtered impurities are suppressed. The filtered liquid, remaining in the impurity retention zone 503, enters the clean water zone 504 and is eventually transported to the water pump via the drain pipe 2 for pressurized delivery. As the water pump continues to operate, more and more impurities accumulate in the impurity retention zone 503, clogging the mesh of the filter screen 502. This makes it difficult for the liquid to flow through the filter screen 502, causing the hydraulic pressure detected by the water pressure sensor 7 at the inlet end of the inlet pipe 1 on the impurity retention zone 503 to continuously increase. Simultaneously, because the liquid has difficulty flowing through the filter screen 502 into the clean water zone 504, the drain pipe 2 on the clean water zone 504... The hydraulic pressure detected by the internal drain end water pressure sensor 8 continuously decreases. The detection results are fed back to the microcontroller 6 for processing via the inlet end water pressure sensor 7 and the drain end water pressure sensor 8. When the difference between the detection results of the inlet end water pressure sensor 7 and the drain end water pressure sensor 8 reaches the set parameter, the microcontroller 6 controls the two-position three-way reversing solenoid valve 3 and the two-position three-way reversing solenoid valve 9 to adjust the opening and closing of the pipeline, so that the flushing pipe 4 and the inlet pipe 1 are opened, and the pipeline between the two-position three-way reversing solenoid valve 3 and the self-cleaning filter cartridge 5, and the pipeline between the self-cleaning filter cartridge 5 and the drain end water pressure sensor 8 are opened. When all pipes between the water pressure sensors 8 are closed, the liquid in the inlet pipe 1 enters the clean water zone 504 through the flushing pipe 4. The liquid in the clean water zone 504 flows in reverse through the filter screen 502, carrying the impurities accumulated in the filter screen 502 out through the slag discharge pipe 11, and is finally discharged by the slag filter 10. After a certain period of discharge, the microcontroller 6 controls the two-position three-way reversing solenoid valve 3 and the two-position three-way reversing solenoid valve 9 to adjust the opening and closing of the pipes, so that the flushing pipe 4 and the inlet pipe 1 are closed, and the liquid can continue to be pressurized and transported by the water pump.

[0023] In this specification, the terms "connection," "installation," "fixing," and "setting" are interpreted broadly. For example, "connection" can mean a fixed connection or an indirect connection via an intermediate component without affecting the relationship between components and the technical effect. It can also mean an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances. In this utility model, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this utility model and its embodiments and are not intended to limit the indicated device, element, or component to having a specific orientation or to be constructed and operated in a specific orientation. Finally, it should be noted that when describing the position of each component and the matching relationship between them, this utility model usually uses one or a pair of components as examples. However, those skilled in the art should understand that such positions and matching relationships also apply to other components / other pairs of components.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pre-filter for a water pump, characterized in that: The system includes a self-cleaning filter cartridge (5), one end of which is connected to the water inlet pipe (1) and the other end of which is connected to the drain pipe (2). A two-position three-way reversing solenoid valve (3) is installed on the water inlet pipe (1). The two-position three-way reversing solenoid valve (3) is connected to the self-cleaning filter cartridge (5) through the flushing pipe (4). A two-position three-way reversing solenoid valve (9) is installed on the drain pipe (2). The two-position three-way reversing solenoid valve (9) is connected to the self-cleaning filter cartridge (5) through the slag discharge pipe (11). A slag filter (10) is installed on the two-position three-way reversing solenoid valve (9). Both the two-position three-way reversing solenoid valve (3) and the two-position three-way reversing solenoid valve (9) are electrically connected to a microcontroller (6) installed on the self-cleaning filter cartridge (5). The self-cleaning filter cartridge (5) includes an outer shell (501). The interior of the outer shell (501) is divided into a debris retention area (503) and a clean water area (504) by a filter screen (502). The debris retention area (503) is connected to the water inlet pipe (1) and the slag discharge pipe (11). The clean water area (504) and the flushing pipe (4) are connected to the drain pipe (2).

2. A pre-filter for a water pump according to claim 1, characterized in that: The microcontroller (6) is fixedly connected to the self-cleaning filter cartridge (5) by bolts, and the microcontroller (6) is electrically connected to external power equipment.

3. A pre-filter for a water pump according to claim 1, characterized in that: A water pressure sensor (7) is installed on the water inlet pipe (1), and a water pressure sensor (8) is installed on the drain pipe (2). Both the water pressure sensor (7) and the water pressure sensor (8) are electrically connected to the microcontroller (6).

4. A pre-filter for a water pump according to claim 1, characterized in that: The water inlet pipe (1) is detachably and sealed to the self-cleaning filter cartridge (5) by means of threads and sealing gaskets, and the filter screen (502) is detachably screwed to the outer shell (501) by means of gaskets.

5. A pre-filter for a water pump according to claim 1, characterized in that: The filter screen (502) is made of stainless steel.

6. A pre-filter for a water pump according to claim 1, characterized in that: The slag discharge pipe (11) is sealed to the outer shell (501), and the flushing pipe (4) is sealed to the outer shell (501).

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