Energy-saving self-cleaning horizontal tube filter

CN224853924UActive Publication Date: 2026-10-16HAINAN LVRONG AGRICULTURAL TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202521859728.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-29
Publication Date
2026-10-16
Estimated Expiration
2035-08-29

AI Technical Summary

Technical Problem

[0003]滤机中的转筒式格栅使用一段时间后部分会被细小的悬浮物填充或附着,降低滤网的通透性,导致滤水效率变低,降低了微滤机的工作效率,传统解决方法是仅采用清水冲洗来处理,这样导致使用到大量的水,清洗后的水含有污染物,加上水量多,增加了后续处理工作及尾水处理压力,其处理成本就会叠加增多;另外,微滤机滚筒严重堵塞之后,只能进行手动清除, 操作繁琐,工作时间长,清除又不彻底,造成设备不能运行,给后续水处理带来影响

Benefits of technology

(1)本实用新型通过设计冲洗单元和喷吹管,实现了过滤器的自内向外冲洗,减少了人工清洗的频率和难度,延长了过滤器使用寿命,利用进水分布管喷出的水流冲击叶轮产生动力,使过滤单元自动旋转,无需额外动力源,节约能源,过滤单元旋转可防止杂质在滤网表面堆积,保持过滤效率,同时旋转运动有助于均匀分布过滤压力,可配置单筒或双筒过滤单元,适应不同水质和过滤需求,增加了设备的通用性,部分净化后的水被回用于冲洗过滤单元,提高了水资源的利用效率。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224853924U_ABST
    Figure CN224853924U_ABST
Patent Text Reader

Abstract

The utility model discloses an energy -conserving self -cleaning horizontal tube filter belongs to sewage treatment technical field, and the filter includes the cylinder, and the upper end one side of cylinder is equipped with the overflow pipe, and the built -in liquid level sensor of cylinder, and the inside bottom of cylinder is equipped with the blowoff pipe, and the inside of cylinder is provided with the outlet pipe, and the one end of outlet pipe penetrates cylinder and extends outward, and the filter unit is rotatably connected to the outside of outlet pipe, and the impeller is arranged on the filter unit, and the water inlet distribution pipe is installed to one side of filter unit in the cylinder, and the water inlet pipe is arranged to the tail end of water inlet distribution pipe, and the water outlet end of water inlet distribution pipe is on the same plane with the impeller, and the flush unit is also installed on the cylinder. The utility model discloses through the high pressure backflush processing of filter screen roller adhering matter of spout pipe, has reduced the flush water quantity and the subsequent tail water treatment pressure, and the cleaning effect is better, and the cleaning efficiency is higher, and the further effective filtration area is big, and the filtration capacity is big, thereby improves the filtration efficiency, and greatly reduces the discharge of aquaculture tail water.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically an energy-saving self-cleaning horizontal pipe filter. Background Technology

[0002] High-density aquaculture utilizes an industrialized aquaculture production model under artificial control. Its core characteristic is the treatment and recycling of aquaculture water. Therefore, a professional wastewater treatment system is required to continuously circulate and treat aquaculture wastewater. Microfiltration machines are commonly used as the main equipment, using a rotary screen to separate suspended solids such as uneaten feed, feces, silt, and algae from the aquaculture wastewater. The separated suspended solids are discharged in a timely manner, purifying the water and achieving the goal of water recycling.

[0003] After a period of use, the rotary screen in a filter becomes partially filled or adhered with fine suspended matter, reducing the filter's permeability and consequently lowering its filtration efficiency. This reduces the overall efficiency of the microfilter. The traditional solution is to simply rinse with clean water, which consumes a large amount of water. The rinse water contains contaminants, and the large volume of water increases the workload of subsequent treatment and the pressure on wastewater treatment, thus increasing treatment costs. Furthermore, when the microfilter drum becomes severely clogged, it can only be manually cleaned, which is cumbersome, time-consuming, and incomplete, causing the equipment to malfunction and impacting subsequent water treatment processes. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0006] An energy-saving self-cleaning horizontal pipe filter includes a cylindrical body with an overflow pipe on one side of the upper end and a built-in liquid level sensor. A drain pipe is located at the bottom of the cylindrical body, and a water outlet pipe is installed inside the cylindrical body. One end of the water outlet pipe extends outward through the cylindrical body and is rotatably connected to a filter unit. An impeller is installed on the filter unit, and an inlet distribution pipe is installed on one side of the filter unit inside the cylindrical body. An inlet pipe is located at the end of the inlet distribution pipe, and the outlet end of the inlet distribution pipe is on the same plane as the impeller. A flushing unit is also installed on the cylindrical body, with a portion of the flushing unit located inside the outlet pipe and the filter unit, and the other portion located outside the cylindrical body. The flushing unit inside the filter unit includes a blowpipe. Water jets from the inlet distribution pipe impact the impeller, causing the filter unit to rotate. Water filling the cylindrical body is purified by the filter unit and discharged through the outlet pipe. When the purified water is discharged, some of the water is reinjected into the filter unit through the flushing unit and flushed from the inside out through the blowpipe.

[0007] Preferably, the outer end of the water inlet distribution pipe is connected to a water inlet pipe, and the inner end of the water inlet distribution pipe is fitted with a water spray elbow. The port of the water spray elbow faces the filter unit, and the angle between the water spray elbow and the side of the filter unit is an acute angle.

[0008] Preferably, the filtration unit includes a first filter cartridge, and the water outlet direction of the blow pipe is directly opposite to the inner surface of the first filter cartridge. A bearing support seat is provided at the connection between the first filter cartridge and the water outlet pipe. Support frames are provided at both ends of the first filter cartridge, and a rotating frame is connected between the support frames. The rotating frame is circumferentially distributed in a equidistant manner against the surface of the first filter cartridge.

[0009] Preferably, the filtration unit includes a first filter cartridge and a second filter cartridge, and both ends of the first filter cartridge and the second filter cartridge are provided with a support frame. A rotating frame is connected between the support frames. The rotating frames on the first filter cartridge are circumferentially distributed and equidistant from each other, and the rotating frames on the second filter cartridge are circumferentially distributed and equidistant from each other.

[0010] Preferably, when the filter unit is a first filter cartridge and a second filter cartridge, a pair of water outlet pipes are provided. The first filter cartridge and the second filter cartridge are rotatably connected to one of the water outlet pipes, and bearing support seats are also provided at the connection between the first filter cartridge and the second filter cartridge and their respective connected water outlet pipes.

[0011] Preferably, when the filter unit is a first filter cartridge and a second filter cartridge, both the first filter cartridge and the second filter cartridge are provided with water inlet distribution pipes on their sides, and the ends of a pair of water inlet distribution pipes are sleeved with connecting bends, and the ends of the connecting bends are connected to a water inlet pipe.

[0012] Preferably, when the filter unit is the first filter cartridge, a water outlet valve is sleeved at one end of the water outlet pipe outside the cartridge. The water outlet valve is a three-way structure, and the water inlet of the rinsing unit is connected to one end of the water outlet valve to introduce purified water.

[0013] Preferably, when the filtration unit is a first filter cartridge and a second filter cartridge, the outlet end of the first filter cartridge is fitted with a three-way pipe, the outlet end of the second filter cartridge is fitted with a four-way pipe, and the three-way pipe and the four-way pipe are connected together by an outlet valve. The inlet end of the flushing unit is connected to one end of the four-way pipe to introduce purified water.

[0014] Preferably, the flushing unit includes a backwash water pump, and the input end of the backwash water pump is connected to a backwash water supply pipe. The other end of the backwash water supply pipe is connected to the outlet of the outlet pipe. The output end of the backwash water pump is connected to a backwash water inlet pipe, and the backwash water inlet pipe is inserted into the outlet pipe and concentric with the outlet pipe. The end of the backwash water inlet pipe passes through the side of the outlet pipe and is connected to the blowpipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) This utility model achieves the internal to external rinsing of the filter by designing a rinsing unit and a blow pipe, which reduces the frequency and difficulty of manual cleaning and extends the service life of the filter. The water flow sprayed from the inlet distribution pipe impacts the impeller to generate power, so that the filter unit rotates automatically without the need for an additional power source, saving energy. The rotation of the filter unit can prevent impurities from accumulating on the filter screen surface and maintain filtration efficiency. At the same time, the rotation helps to evenly distribute the filtration pressure. It can be configured with a single-cylinder or double-cylinder filter unit to adapt to different water quality and filtration needs, increasing the versatility of the equipment. Some of the purified water is reused to rinse the filter unit, which improves the utilization efficiency of water resources.

[0016] (2) This utility model achieves high-pressure backwashing treatment of the deposits on the filter screen roller through the blow pipe, which reduces the amount of flushing water and the pressure of subsequent tailwater treatment, resulting in better cleaning effect and higher cleaning efficiency. Furthermore, it has a larger effective filtration area and a larger filtration volume, thereby improving filtration efficiency, greatly reducing the discharge of aquaculture tailwater, realizing the reuse of aquaculture tailwater, fundamentally solving the problem of aquaculture tailwater recycling, facilitating operation and maintenance, ensuring treatment effect while greatly reducing equipment usage costs, occupying less space, consuming less energy, having low electricity costs, being easy to install without professional personnel, and being easy to widely promote, effectively meeting usage needs. Attached Figure Description

[0017] Figure 1 This is a plan view of the internal structure of the single-cylinder filter in this utility model.

[0018] Figure 2 This is a structural diagram of the filtration and backwashing unit in the single-cylinder filter of this utility model.

[0019] Figure 3 This is a front view of the single-cylinder filter in this utility model.

[0020] Figure 4This is a plan view of the internal structure of the dual-cylinder filter in this utility model.

[0021] Figure 5 This is a structural diagram of the filtration and backwashing unit in the dual-cylinder filter of this utility model.

[0022] Figure 6 This is a side view of the dual-cylinder filter in this utility model.

[0023] Figure 7 This is a front view of the dual-cylinder filter in this utility model.

[0024] The correspondence between the labels and component names in the attached figures is as follows: 100. Filter cylinder; 101. Inlet pipe; 102. Drain pipe; 103. Inlet distribution pipe; 1031. Spray elbow; 104. Connecting bend; 105. Overflow pipe; 106. Liquid level sensor; 201. First filter cartridge; 201a. Operating frame; 201b. Support frame; 201c. Bearing support seat; 201d. Impeller; 202. Second filter cartridge; 301. Outlet pipe; 302. Outlet valve; 302a. Four-way pipe; 302b. Three-way pipe; 303. Backwash pump; 3031. Backwash water supply pipe; 304. Backwash inlet pipe; 305. Pulse pipe. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0028] like Figure 1 and Figure 3As shown, an energy-saving self-cleaning horizontal pipe filter in this embodiment includes a cylindrical body 100. An overflow pipe 105 is provided on one side of the upper end of the cylindrical body 100. A liquid level sensor 106 is built into the cylindrical body 100. A drain pipe 102 is provided at the bottom of the cylindrical body 100. A water outlet pipe 301 is provided inside the cylindrical body 100. One end of the water outlet pipe 301 extends outward through the cylindrical body 100. A filter unit is rotatably connected to the outside of the water outlet pipe 301. An impeller 201d is provided on the filter unit. An inlet distribution pipe 103 is installed inside the cylindrical body 100 on one side of the filter unit. An inlet pipe 101 is provided at the end of the inlet distribution pipe 103. The water end and the impeller 201d are on the same plane. A flushing unit is also installed on the cylinder 100. The flushing unit is partially distributed in the outlet pipe 301 and the filter unit. Another part of the flushing unit is located outside the cylinder 100. The flushing unit located in the filter unit includes a blow pipe 305. The water flow sprayed through the inlet distribution pipe 103 impacts the impeller 201d. When the impeller 201d rotates, it drives the filter unit to rotate. The water filling the cylinder 100 is purified by the filter unit and discharged through the outlet pipe 301. When the purified water is discharged, part of the water flow is reinjected into the filter unit through the flushing unit and flushed from the inside to the outside through the blow pipe 305.

[0029] exist Figure 1 and Figure 4 In order to make the water flow sprayed through the water inlet distribution pipe 103 better impact the impeller 201d, the direction of the water flow must be at a certain angle to the impeller 201d. Therefore, in this embodiment, a water inlet pipe 101 is connected to the outer end of the water inlet distribution pipe 103, and a water spray elbow 1031 is sleeved on the inner end of the water inlet distribution pipe 103. The port of the water spray elbow 1031 faces the filter unit, and the angle between the water spray elbow 1031 and the side of the filter unit is an acute angle. The angle of the water flow sprayed from the water inlet distribution pipe 103 can be adjusted by using the water spray elbow 1031, so that the water flow can better impact the impeller 201d, thereby driving the impeller 201d to rotate.

[0030] Example 1 exist Figure 1-3In this embodiment, the filtration unit includes a first filter cartridge 201, and the water outlet direction of the blow pipe 305 is directly opposite to the inner surface of the first filter cartridge 201. Support frames 201b are provided at both ends of the first filter cartridge 201, and a rotating frame 201a is connected between the support frames 201b. The rotating frames 201a are circumferentially and equidistantly distributed on the surface of the first filter cartridge 201. In this embodiment, the support frames 201b and the rotating frames 201a form the frame structure of the filtration unit, and the first filter cartridge 201 covering it performs the filtration effect. A bearing support seat 201c is provided at the connection between the first filter cartridge 201 and the water outlet pipe 301, i.e., the bearing support seat 201c is embedded in the center of the support frame 201b, and the rotation and installation of the filtration unit are achieved through the bearing support seat 201c. When the filtration unit is the first filter cartridge 201, a water outlet valve 302 is sleeved at one end of its water outlet pipe 301 outside the cylinder 100. 02 is a three-way structure. Further, the flushing unit includes a backwash pump 303, and the input end of the backwash pump 303 is connected to a backwash water supply pipe 3031. The other end of the backwash water supply pipe 3031 is connected to the outlet of the outlet pipe 301. The output end of the backwash pump 303 is connected to a backwash inlet pipe 304. To achieve better pipe distribution, in this embodiment, the backwash inlet pipe 304 is inserted into the outlet pipe 301 and concentric with it. The end of 4 passes through the side of the water outlet pipe 301 and is connected to the blow pipe 305. Therefore, in this embodiment, the water inlet of the flushing unit is actually the backwash water supply pipe 3031. The backwash water supply pipe 3031 is connected to one end of the water outlet valve 302. The purified water is introduced by the backwash water pump 303 and transported to the backwash water inlet pipe 304. The flushing water enters the blow pipe 305 through the backwash water inlet pipe 304, thereby flushing the first filter cartridge 201 from the inside out.

[0031] Example 2 exist Figure 4-7In this embodiment, the filtration unit includes a first filter cartridge 201 and a second filter cartridge 202. Both ends of the first filter cartridge 201 and the second filter cartridge 202 are provided with support frames 201b, and a rotating frame 201a connects the support frames 201b. The rotating frames 201a on the first filter cartridge 201 are circumferentially and equidistantly distributed, adhering to the surface of the first filter cartridge 201. Similarly, the rotating frames 201a on the second filter cartridge 202 are circumferentially and equidistantly distributed, adhering to the surface of the second filter cartridge 202. In this embodiment, the support frames 201b and the rotating frames 201a form the frame structure of the filtration unit, while the first filter cartridge 201 and the second filter cartridge 202 covering them... It achieves a filtration effect; when the filtration unit is a first filter cartridge 201 and a second filter cartridge 202, there is a pair of outlet pipes 301. The first filter cartridge 201 and the second filter cartridge 202 are rotatably connected to one of the outlet pipes 301, and the connection between the first filter cartridge 201 and the second filter cartridge 202 and their respective connected outlet pipes 301 is also provided with a bearing support seat 201c. In this embodiment, the connection between the first filter cartridge 201 and the second filter cartridge 202 and the outlet pipe 301 is also provided with a bearing support seat 201c. That is, the bearing support seat 201c is embedded in the center of the support frame 201b, and the rotation and installation of the filtration unit are realized through the bearing support seat 201c.

[0032] When the filtration unit is a first filter cartridge 201 and a second filter cartridge 202, both the first filter cartridge 201 and the second filter cartridge 202 are provided with water inlet distribution pipes 103. In this embodiment, since there is a pair of water inlet distribution pipes 103, in order to achieve synchronous water output, a connecting bend 104 is sleeved at the end of the pair of water inlet distribution pipes 103, and the end of the connecting bend 104 is connected to a common water inlet pipe 101. Water flows in through the water inlet pipe 101, and after being diverted by the connecting bend 104, it enters the pair of water inlet distribution pipes 103, thereby draining water through the pair of water inlet distribution pipes 103 to respectively... The impellers 201d on the first filter cartridge 201 and the second filter cartridge 202 impact each other, achieving synchronous rotation of the first filter cartridge 201 and the second filter cartridge 202. Furthermore, when the filtration unit consists of the first filter cartridge 201 and the second filter cartridge 202, a three-way pipe 302b is sleeved at the water outlet end of the first filter cartridge 201, and a four-way pipe 302a is sleeved at the water outlet end of the second filter cartridge 202. The water inlet end of the rinsing unit is connected to one end of the four-way pipe 302a to introduce purified water. In this embodiment, the ends of the two water outlet pipes 301 are connected as one unit through the three-way pipe 302b and the four-way pipe 302a. Furthermore, the three-way pipe 302b and the four-way pipe 302a are connected by a common outlet valve 302 for unified drainage. The flushing unit includes a backwash pump 303, and the input end of the backwash pump 303 is connected to a backwash water supply pipe 3031. The other end of the backwash water supply pipe 3031 is connected to the outlet of the outlet pipe 301. The output end of the backwash pump 303 is connected to a backwash inlet pipe 304. In this embodiment, a backwash inlet pipe 304 is actually installed in each pair of outlet pipes 301. The backwash inlet pipes 304 on the first filter cartridge 201 and the second filter cartridge 202 are respectively connected to the three-way pipe 302b. 2b and the other ports of the four-way pipe 302a are inserted into the water outlet pipe 301. In order to implement a better pipeline distribution, the backwash inlet pipe 304 in this embodiment is inserted into the water outlet pipe 301 and is concentric with the water outlet pipe 301. The end of the backwash inlet pipe 304 passes through the side of the water outlet pipe 301 and is connected to the blow pipe 305. The first filter cartridge 201 and the second filter cartridge 202 are rinsed through the blow pipe 305. It is worth noting that the water inlet of the rinsing unit in this embodiment is the backwash water supply pipe 3031, which is connected to one end of the four-way pipe 302a.

[0033] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. An energy-saving self-cleaning horizontal pipe filter, comprising a cylindrical body (100), an overflow pipe (105) provided on one side of the upper end of the cylindrical body (100), and a liquid level sensor (106) built into the cylindrical body (100), a drain pipe (102) provided at the bottom of the inner cavity of the cylindrical body (100), and a water outlet pipe (301) provided inside the cylindrical body (100), one end of the water outlet pipe (301) extending outward through the cylindrical body (100). Its features are: A filter unit is rotatably connected to the outlet pipe (301). An impeller (201d) is installed on the filter unit. An inlet distribution pipe (103) is installed inside the cylinder (100) on one side of the filter unit. An inlet pipe (101) is provided at the end of the inlet distribution pipe (103). The outlet end of the inlet distribution pipe (103) is on the same plane as the impeller (201d). A flushing unit is also installed on the cylinder (100), and the flushing unit is partially distributed in the outlet pipe (301) and the filter unit for flushing. Another part of the unit is located outside the cylinder (100). The flushing unit located inside the filter unit includes a blow pipe (305). The water flow sprayed through the water inlet distribution pipe (103) impacts the impeller (201d). When the impeller (201d) rotates, it drives the filter unit to rotate. The water filled in the cylinder (100) is purified by the filter unit and discharged through the water outlet pipe (301). When the purified water is discharged, part of the water flow is reinjected into the filter unit through the flushing unit and flushed from the inside out through the blow pipe (305).

2. The energy-saving self-cleaning horizontal pipe filter according to claim 1, characterized in that: The outer end of the water inlet distribution pipe (103) is connected to the water inlet pipe (101), and the inner end of the water inlet distribution pipe (103) is fitted with a water spray elbow (1031). The port of the water spray elbow (1031) faces the filter unit, and the angle between the water spray elbow (1031) and the side of the filter unit is an acute angle.

3. The energy-saving self-cleaning horizontal pipe filter according to claim 1, characterized in that: The filtration unit includes a first filter cartridge (201), and the water outlet direction of the blow pipe (305) is directly opposite to the inner surface of the first filter cartridge (201). A bearing support seat (201c) is provided at the connection between the first filter cartridge (201) and the water outlet pipe (301). Support frames (201b) are provided at both ends of the first filter cartridge (201), and a rotating frame (201a) is connected between the support frames (201b). The rotating frame (201a) is circumferentially distributed in a equidistant manner against the surface of the first filter cartridge (201).

4. The energy-saving self-cleaning horizontal pipe filter according to claim 1, characterized in that: The filtration unit includes a first filter cartridge (201) and a second filter cartridge (202), and both ends of the first filter cartridge (201) and the second filter cartridge (202) are provided with support frames (201b). A rotating frame (201a) is connected between the support frames (201b). The rotating frame (201a) on the first filter cartridge (201) is attached to the surface of the first filter cartridge (201) and is distributed equidistantly in a circular pattern. The rotating frame (201a) on the second filter cartridge (202) is attached to the surface of the second filter cartridge (202) and is distributed equidistantly in a circular pattern.

5. The energy-saving self-cleaning horizontal pipe filter according to claim 4, characterized in that: When the filter unit is a first filter cartridge (201) and a second filter cartridge (202), a pair of water outlet pipes (301) are provided. The first filter cartridge (201) and the second filter cartridge (202) are rotatably connected to one of the water outlet pipes (301), and a bearing support seat (201c) is also provided at the connection between the first filter cartridge (201) and the second filter cartridge (202) and their respective connected water outlet pipes (301).

6. The energy-saving self-cleaning horizontal pipe filter according to claim 3, characterized in that: When the filter unit is a first filter cartridge (201) and a second filter cartridge (202), both the first filter cartridge (201) and the second filter cartridge (202) are provided with water inlet distribution pipes (103), and the ends of a pair of water inlet distribution pipes (103) are sleeved with connecting bends (104), and the ends of the connecting bends (104) are connected to the water inlet pipes (101).

7. The energy-saving self-cleaning horizontal pipe filter according to claim 3, characterized in that: When the filter unit is the first filter cartridge (201), its outlet pipe (301) is connected to an outlet valve (302) at one end outside the cylinder (100). The outlet valve (302) is a three-way structure. The inlet end of the flushing unit is connected to one end of the outlet valve (302) to introduce purified water.

8. The energy-saving self-cleaning horizontal pipe filter according to claim 4, characterized in that: When the filtration unit is a first filter cartridge (201) and a second filter cartridge (202), the outlet end of the first filter cartridge (201) is fitted with a three-way pipe (302b), and the outlet end of the second filter cartridge (202) is fitted with a four-way pipe (302a). The three-way pipe (302b) and the four-way pipe (302a) are connected together by an outlet valve (302). The inlet end of the flushing unit is connected to one end of the four-way pipe (302a) to introduce purified water.

9. The energy-saving self-cleaning horizontal pipe filter according to claim 1, characterized in that: The flushing unit includes a backwash pump (303), and the input end of the backwash pump (303) is connected to a backwash water supply pipe (3031). The other end of the backwash water supply pipe (3031) is connected to the outlet of the outlet pipe (301). The output end of the backwash pump (303) is connected to a backwash inlet pipe (304), and the backwash inlet pipe (304) is inserted into the outlet pipe (301) and is concentric with the outlet pipe (301). The end of the backwash inlet pipe (304) passes through the side of the outlet pipe (301) and is connected to the blow pipe (305).