A pipeline filtering device for building water supply and drainage engineering

Abstract

The present invention relates to the technical field of filtering devices, and specifically to a pipe filtering device for building water supply and drainage engineering, comprising a shell, a first filter cartridge, a second filter cartridge, a switching portion and a filter plate, wherein a water inlet and a water outlet are respectively arranged at both ends of the shell, and the filter plate can be rotatably installed in the shell, and the filter plate has a first state and a second state in the shell, and the first filter cartridge and the second filter cartridge have a first matching state and a second matching state. A pipe filtering device for building water supply and drainage engineering of the present invention can extend the filtering time of water flow by arranging a filter plate, a first filter cartridge and a second filter cartridge to match each other, and making the first filter cartridge and the second filter cartridge work alternately in the pipeline, and utilizing the filter plate to replace the first filter cartridge and the second filter cartridge to work in the interval when the first filter cartridge and the second filter cartridge are switched, which can reduce the number of times the pipeline is closed and improve work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of filtering devices, and in particular to a pipeline filtering device for building water supply and drainage engineering. Background Art

[0002] At present, the pipeline filtering devices commonly used in building water supply and drainage projects, such as Y-type filters, block and filter impurities through the filter screen to separate impurities in the water flow. When too many impurities are accumulated at the filter screen, in order to ensure the filtering requirements, it is necessary to manually close the valve first, then take out the detachable filter screen, clean up the garbage and discharge it, and then reinstall it. The filter screen of this filtering device needs to close the valve after using it for a period of time, which reduces the drainage efficiency. In addition, since the filter screen of this filter is set on the branch of the pipeline, it is easy to be impacted by the water hammer effect at the connection position between the filter screen and the pipeline, which reduces the service life of the pipeline. Summary of the invention

[0003] The invention provides a pipeline filtering device for building water supply and drainage engineering, so as to solve the problems that the filter screen of the existing filtering device has a short service life and the setting of the filtering device easily reduces the service life of the pipeline.

[0004] A pipe filter device for building water supply and drainage engineering of the present invention adopts the following technical scheme: a pipe filter device for building water supply and drainage engineering, comprising a shell, a first filter cartridge, a second filter cartridge, a switching part and a filter plate, wherein a water inlet and a water outlet are respectively arranged at two ends of the shell, and the filter plate can be rotatably installed in the shell, and the filter plate has a first state and a second state in the shell, when in the first state, the filter plate is parallel to the water flow direction, and when in the second state, the filter plate is perpendicular to the water flow direction, the initial filter plate is in the first state, and the rotation of the filter plate can switch the filter plate from the first state to the second state; the first filter cartridge and the second filter cartridge are both arranged on a side of the filter plate away from the water inlet, the first filter cartridge and the second filter cartridge have the same structure, the first filter cartridge and the second filter cartridge both have a filtering end and an opening end, the first filter cartridge and the second filter cartridge both have a filtering end and an opening end, and the second filter cartridge has a first filter end and a second filter end. A filter cartridge and a second filter cartridge have a first mating state and a second mating state. When in the first mating state, the filter end of the first filter cartridge faces the side of the water inlet, the open end of the second filter cartridge faces the side of the water inlet, and the open end of the first filter cartridge contacts the filter end of the second filter cartridge; when in the second mating state, the open end of the first filter cartridge faces the side of the water inlet, the filter end of the second filter cartridge faces the side of the water inlet, and the filter end of the first filter cartridge contacts the open end of the second filter cartridge. Initially, the first filter cartridge and the second filter cartridge are in the first mating state; the switching part can switch the first filter cartridge and the second filter cartridge from the first mating state to the second mating state, and before the first filter cartridge and the second filter cartridge switch from the first mating state to the second mating state, the filter plate switches from the first state to the second state.

[0005] Furthermore, the shell includes a main pipeline and two branch pipelines, the cross-section of the main pipeline is circular, the filter plate is circular, the filter plate is located in the main pipeline, and the water inlet and the water outlet are respectively located at the two ends of the main pipeline; the two branch pipelines are evenly distributed and inclined along the circumferential direction of the main pipeline, and the two branch pipelines are connected to the main pipeline, and the first filter cartridge and the second filter cartridge are respectively located in the two branch pipelines.

[0006] Furthermore, the cross-sectional area of ​​the branch pipeline is larger than the cross-sectional area of ​​the first filter cartridge.

[0007] Furthermore, the switching part includes a first flange and a first rotating rod; the first flange is detachably connected to one of the branch pipes, one end of the first rotating rod is installed on the first filter cartridge and extends through the first flange, and the switching part also includes a second flange and a second rotating rod; the second flange is detachably connected to another branch pipe, one end of the second rotating rod is installed on the second filter cartridge and extends through the second flange.

[0008] Furthermore, a first rotating disk is disposed at one end of the first rotating rod away from the first filter cartridge, and a second rotating disk is disposed at one end of the second rotating rod away from the second filter cartridge.

[0009] Furthermore, a first elastic member is disposed between the first flange and the first filter cartridge, and the first elastic member is wound around the first rotating rod; a second elastic member is disposed between the second flange and the second filter cartridge, and the second elastic member is wound around the second rotating rod.

[0010] Furthermore, a third flange and a third rotating rod are provided on the main pipe. The third flange is detachably mounted on the main pipe. One end of the third rotating rod is mounted on the filter plate and extends out through the third flange.

[0011] Furthermore, a first sealing strip is provided between the first filter cartridge and its corresponding branch pipe, and between the second filter cartridge and its corresponding branch pipe, a second sealing strip is provided between the first flange plate and its corresponding branch pipe, and between the second flange plate and its corresponding branch pipe, and a third sealing strip is provided between the third flange and the main pipe.

[0012] The beneficial effects of the present invention are as follows: a pipeline filtering device for building water supply and drainage engineering of the present invention is provided with a filter plate, a first filter cartridge and a second filter cartridge to cooperate with each other, so that the first filter cartridge and the second filter cartridge work alternately in the pipeline, which can extend the filtering time of the water flow, and utilizes the filter plate to replace the first filter cartridge and the second filter cartridge to work in the interval when the first filter cartridge and the second filter cartridge are switched, which can reduce the number of pipeline closures and improve work efficiency. The matching state of the first filter cartridge and the second filter cartridge can be switched without affecting the normal transportation of water, and the arrangement of the first filter cartridge and the second filter cartridge allows the water flow to enter from the water inlet, pass between the first filter cartridge and the second filter cartridge, and then continue to flow through the water outlet, without causing impact on the pipe wall, thereby extending the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the overall structure of an embodiment of a pipeline filtering device for building water supply and drainage engineering of the present invention;

[0015] Figure 2 A side view of the overall structure of an embodiment of a pipeline filtering device for building water supply and drainage engineering of the present invention;

[0016] Figure 3 for Figure 2 Sectional view along AA;

[0017] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0018] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0019] Figure 6 It is a schematic diagram of a first matching state of a first filter cartridge and a second filter cartridge of an embodiment of a pipeline filtering device for building water supply and drainage engineering of the present invention;

[0020] Figure 7 It is a schematic diagram of a second matching state of a first filter cartridge and a second filter cartridge of an embodiment of a pipeline filtering device for building water supply and drainage engineering of the present invention;

[0021] Figure 8The present invention is a schematic structural diagram of a first filter cartridge of an embodiment of a pipeline filtering device for building water supply and drainage engineering.

[0022] In the figure: 100, shell; 101, water inlet; 102, water outlet; 110, main pipeline; 120, branch pipeline; 200, first filter cartridge; 201, filter screen; 300, second filter cartridge; 310, second elastic member; 400, switching part; 410, first flange; 420, first rotating rod; 430, second flange; 440, second rotating rod; 450, third flange; 460, third rotating rod; 470, third rotating disk; 500, filter plate; 600, first sealing strip. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] An embodiment of a pipeline filtering device for building water supply and drainage engineering of the present invention is as follows Figures 1 to 8 shown.

[0025] A pipeline filtering device for building water supply and drainage engineering includes a shell 100, a first filter part, a second filter part, a switching part 400 and a filter plate 500. The shell 100 is provided with a water inlet 101 and a water outlet 102 at both ends. When in use, the two ends of the shell 100 are connected to the pipeline respectively, so that water can enter from the water inlet 101 and flow out from the water outlet 102.

[0026] The filter plate 500 can be rotatably installed in the housing 100. The filter plate 500 has a first state and a second state in the housing 100. In the first state, the filter plate 500 is parallel to the water flow direction. After water enters the housing 100 from the water inlet 101, it can pass through both sides of the filter plate 500 without being filtered by the filter plate 500 and directly flows toward the water outlet 102. In the second state, the filter plate 500 is perpendicular to the water flow direction. After water enters the housing 100 from the water inlet 101, it needs to be filtered by the filter plate 500 before flowing toward the water outlet 102. In the initial state, the filter plate 500 is in the first state. The rotation of the filter plate 500 can switch the filter plate 500 from the first state to the second state.

[0027] The first filter part includes a first filter cartridge 200, and the second filter part includes a second filter cartridge 300. The first filter cartridge 200 and the second filter cartridge 300 are both arranged on the side of the filter plate 500 away from the water inlet 101. The first filter cartridge 200 is a cylindrical structure with multiple filter holes. A filter screen 201 is arranged on the side of the first filter cartridge 200 close to the water inlet 101. The filter screen 201 forms a filter end, and an open end is formed between the filter screen 201 and the first filter cartridge 200. The angle between the filter end and the open end of the first filter cartridge 200 is an obtuse angle.

[0028] The second filter cartridge 300 has the same structure as the first filter cartridge 200. Both the first filter cartridge 200 and the second filter cartridge 300 have a filtering end and an open end. The first filter cartridge 200 and the second filter cartridge 300 have a first matching state and a second matching state. When in the first matching state, the filtering end of the first filter cartridge 200 faces the side of the water inlet 101, the open end of the second filter cartridge 300 faces the side of the water inlet 101, and the open end of the first filter cartridge 200 contacts the filtering end of the second filter cartridge 300; when in the second matching state, the open end of the first filter cartridge 200 faces the side of the water inlet 101, the filtering end of the second filter cartridge 300 faces the side of the water inlet 101, and The filtering end of the first filter cartridge 200 contacts the open end of the second filter cartridge 300, and initially the first filter cartridge 200 and the second filter cartridge 300 are in a first mating state; the switching portion 400 can switch the first filter cartridge 200 and the second filter cartridge 300 from the first mating state to the second mating state, and before the first filter cartridge 200 and the second filter cartridge 300 switch from the first mating state to the second mating state, the filter plate 500 rotates to switch the filter plate 500 from the first state to the second state, and after the first filter cartridge 200 and the second filter cartridge 300 switch from the first mating state to the second mating state, the filter plate 500 rotates to switch the filter plate 500 from the second state to the first state.

[0029] Specifically, the housing 100 includes a main pipeline 110 and two branch pipelines 120. The cross section of the main pipeline 110 is circular. The filter plate 500 is circular. The filter plate 500 is located in the main pipeline 110. The water inlet 101 and the water outlet 102 are respectively located at the two ends of the main pipeline 110. The two branch pipelines 120 are evenly distributed and inclined along the circumferential direction of the main pipeline 110, and the two branch pipelines 120 are both connected to the main pipeline 110. The first filter cartridge 200 and the second filter cartridge 300 are respectively located in the two branch pipelines 120. The branch pipeline 120 has a first end and a second end. The first end is fixedly connected to and connected to the main pipeline 110, and the second end is arranged on a side away from the water inlet 101 relative to the first end. The cross-sectional area of ​​the branch pipeline 120 is larger than the cross-sectional area of ​​the first filter cartridge 200, so that water can flow into the main pipeline 110 again from the branch pipeline 120 after passing through the first filter cartridge 200 and the second filter cartridge 300.

[0030] A flow meter is provided in the main line 110, and the flow meter can detect the flow rate of water. Before the first filter cartridge 200 or the second filter cartridge 300 is filled with impurities, the flow rate of water in the main line 110 will be reduced due to the action of the impurities. By detecting the value of the flow meter, when the value of the flow meter is less than a first preset value, the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state.

[0031] When the pipe filter device for building water supply and drainage engineering of this embodiment is used, in the initial state, the filter plate 500 does not work. When water passes through the filter plate 500, it passes through both sides of the filter plate 500 and is filtered at the filter end of the first filter cartridge 200. Under the continuous impact of the water flow, impurities come from the filter end of the first filter cartridge 200 to the open end of the second filter cartridge 300 and enter the second filter cartridge 300. The impurities are collected in the second filter cartridge 300, and the filtered water flows out from the water outlet 102. At this time, the first filter cartridge 200 assumes the filtering function, and the second filter cartridge 300 assumes the collecting function.

[0032] As the water flow is continuously filtered, after a certain period of use, when the value of the flow meter is less than the first preset value, before the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state, the filter plate 500 is first rotated to make the filter plate 500 perpendicular to the water flow direction, and the filter plate 500 is switched from the first state to the second state, so that before the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state, the filter plate 500 is used to temporarily assume the filtering function. After the switching unit 400 switches the first filter cartridge 200 and the second filter cartridge 300 from the first matching state to the second matching state, the filter plate 500 is switched from the second state to the first state again, so that the opening end of the first filter cartridge 200 faces the water inlet 101, and the filtering end of the second filter cartridge 300 faces the water inlet 101. At this time, the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state, and the first filter cartridge 200 assumes the collection function, and the second filter cartridge 300 assumes the filtering function.

[0033] In this embodiment, by setting the filter plate 500, the first filter cartridge 200 and the second filter cartridge 300 to cooperate with each other, the first filter cartridge 200 and the second filter cartridge 300 work alternately in the pipeline, which can extend the filtering time of the water flow, and the filter plate 500 is used to replace the first filter cartridge 200 and the second filter cartridge 300 to work in the interval when the first filter cartridge 200 and the second filter cartridge 300 switch, which can reduce the number of times the pipeline is closed and improve work efficiency. The coordination state of the first filter cartridge 200 and the second filter cartridge 300 is switched without affecting the normal transportation of water. The first filter cartridge 200 and the second filter cartridge 300 are arranged so that after the water flow enters from the water inlet 101, it will pass between the first filter cartridge 200 and the second filter cartridge 300, and then continue to flow through the water outlet 102, without causing impact on the pipe wall, thereby extending the service life of the pipeline.

[0034] In this embodiment, the switching part 400 includes a first switching component and a second switching component. The first switching component includes a first flange 410 and a first rotating rod 420. The first flange 410 is detachably connected to one of the branch pipes 120. Specifically, the first flange 410 is bolted to one of the branch pipes 120. One end of the first rotating rod 420 is mounted on the first filter cartridge 200 and extends through the first flange 410. The other end of the first rotating rod 420 is provided with a first rotating disk. When in use, the first filter cartridge 200 can be driven to rotate by rotating the first rotating disk. A first elastic member is provided between the first flange 410 and the first filter cartridge 200. The first elastic member is a first spring, and the first spring is wound around the first rotating rod 420. When the operator pulls the first rotating disk, the first spring is compressed, driving the first filter cartridge 200 and the second filter cartridge 300 to disengage, thereby avoiding interference between the first filter cartridge 200 and the second filter cartridge 300 when rotating.

[0035] The second switching assembly includes a second flange 430 and a second rotating rod 440; the second flange 430 is detachably connected to another branch pipe 120, specifically, the second flange 430 is bolted to another branch pipe 120. One end of the second rotating rod 440 is mounted on the second filter cartridge 300 and extends through the second flange 430. The other end of the second rotating rod 440 is provided with a second rotating disk. When in use, the second filter cartridge 300 can be driven to rotate by rotating the second rotating disk. A second elastic member 310 is provided between the second flange 430 and the second filter cartridge 300. The second elastic member 310 is a second spring, and the second spring is wound around the second rotating rod 440. When the second rotating disk is pulled, the second spring is compressed, which can avoid interference between the first filter cartridge 200 and the second filter cartridge 300 when rotating.

[0036] A first sealing strip 600 is provided between the first filter cartridge 200 and the corresponding branch pipe 120 as well as between the second filter cartridge 300 and the corresponding branch pipe 120, and a second sealing strip is provided between the first flange 410 and the corresponding branch pipe 120 as well as between the second flange 430 and the corresponding branch pipe 120.

[0037] In this embodiment, a first flange 410 is arranged to cooperate with a first rotating rod 420, and a second flange 430 is arranged to cooperate with a second rotating rod 440. The first rotating rod 420 drives the first filter cartridge 200 to rotate, and the second rotating rod 440 drives the second filter cartridge 300 to rotate, so that the first filter cartridge 200 and the second filter cartridge 300 are switched from a first cooperation state to a second cooperation state.

[0038] In this embodiment, a third flange 450 and a third rotating rod 460 are provided on the main line 110. The third flange 450 is detachably mounted on the main line 110. One end of the third rotating rod 460 is mounted on the filter plate 500 and extends through the third flange 450. A third rotating disk 470 is provided at the other end of the third rotating rod 460. When in use, the filter plate 500 can be driven to rotate by rotating the third rotating disk 470, so that the filter plate 500 is switched from the first state to the second state.

[0039] Furthermore, a third sealing strip is provided between the third flange 450 and the main pipe 110 .

[0040] In combination with the above embodiments, the specific working principle and working state are as follows:

[0041] In the initial state, the filter plate 500 is in the first state, the filter plate 500 is parallel to the water flow direction, and after water enters the housing 100 from the water inlet 101, it passes through both sides of the filter plate 500 without being filtered by the filter plate 500, and flows directly toward the water outlet 102. Initially, the first filter cartridge 200 and the second filter cartridge 300 are in the first matching state. When the first filter cartridge 200 and the second filter cartridge 300 are in the first matching state, the filtering end of the first filter cartridge 200 faces the side of the water inlet 101, and the opening end of the second filter cartridge 300 faces the side of the water inlet 101, and the opening end of the first filter cartridge 200 contacts the filtering end of the second filter cartridge 300. At this time, after passing through the filter plate 500, the water is filtered at the filtering end of the first filter cartridge 200, and under the continuous impact of the water flow, impurities are moved from the filtering end of the first filter cartridge 200 to the opening end of the second filter cartridge 300 and enter the second filter cartridge 300, and the impurities are collected in the second filter cartridge 300. At this time, the first filter cartridge 200 assumes the filtering function, and the second filter cartridge 300 assumes the collecting function.

[0042] As the water flow is continuously filtered, after a certain period of use, when the value of the flow meter is less than the first preset value, before the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state, the third turntable is first rotated. The rotation of the third turntable rotates the filter plate 500 through the third rotating rod 460 to rotate the filter plate 500 so that the filter plate 500 is rotated to be perpendicular to the water flow direction. Before the first filter cartridge 200 and the second filter cartridge 300 are switched from the first matching state to the second matching state, the filter plate 500 is used to temporarily assume the filtering function.

[0043] Then, pull the first turntable and the second turntable to compress the first spring and the second spring, driving the first filter cartridge 200 and the second filter cartridge 300 to disengage, and then rotate the first turntable and the second turntable. The first turntable drives the first filter cartridge 200 to rotate through the first rotating rod 420, and the second turntable drives the second filter cartridge 300 to rotate through the second rotating rod 440, so that the opening end of the first filter cartridge 200 faces the water inlet 101, and the filtering end of the second filter cartridge 300 faces the water inlet 101, and the filtering end of the first filter cartridge 200 contacts the opening end of the second filter cartridge 300, and the first filter cartridge 200 and the second filter cartridge 300 switch from the first matching state to the second matching state, and the first filter cartridge 200 assumes the collection function, and the second filter cartridge 300 assumes the filtering function. After the first filter cartridge 200 and the second filter cartridge 300 are switched to the second matching state, the third rotating disk is rotated again to rotate the filter plate 500 to the first state again. At this time, under the impact of the water flow, the impurities on the filter plate 500 are cleaned to prevent the impurities from accumulating on the filter plate 500. With the continuous filtration of the water flow, when the flow rate of the flow meter is less than the first preset value again, the valve is closed to clean the impurities in the first filter cartridge 200 and the second filter cartridge 300.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe filter device for building water supply and drainage engineering, characterized in that: The invention comprises a housing, a first filter cartridge, a second filter cartridge, a switching part and a filter plate. The two ends of the housing are respectively provided with a water inlet and a water outlet. The filter plate can be rotatably installed in the housing. The filter plate has a first state and a second state in the housing. When in the first state, the filter plate is parallel to the water flow direction. When in the second state, the filter plate is perpendicular to the water flow direction. The initial filter plate is in the first state. The filter plate can be switched from the first state to the second state by rotating the filter plate. The first filter cartridge and the second filter cartridge are both arranged on a side of the filter plate away from the water inlet, the first filter cartridge and the second filter cartridge have the same structure, the first filter cartridge and the second filter cartridge both have a filter end and an open end, the first filter cartridge is a cylindrical structure with a plurality of filter holes, a filter screen is arranged on the side of the first filter cartridge close to the water inlet, the filter screen forms the filter end, an open end is formed between the filter screen and the first filter cartridge, an angle between the filter end and the open end of the first filter cartridge is an obtuse angle, the first filter cartridge and the second filter cartridge have a first matching state and a second matching state, when in the first matching state, the filter end of the first filter cartridge faces the water inlet side, and the filter end of the first filter cartridge faces the water inlet side, and the filter end of the first filter cartridge faces the water inlet side. The open ends of the two filter cartridges face one side of the water inlet, and the open end of the first filter cartridge contacts the filter end of the second filter cartridge; when in the second matching state, the open end of the first filter cartridge faces the side of the water inlet, the filter end of the second filter cartridge faces the side of the water inlet, and the filter end of the first filter cartridge contacts the open end of the second filter cartridge, and initially the first filter cartridge and the second filter cartridge are in the first matching state; the switching part can switch the first filter cartridge and the second filter cartridge from the first matching state to the second matching state, and before the first filter cartridge and the second filter cartridge switch from the first matching state to the second matching state, the filter plate switches from the first state to the second state.

2. A pipe filter device for building water supply and drainage engineering according to claim 1, characterized in that: The shell includes a main pipeline and two branch pipelines. The cross-section of the main pipeline is circular, the filter plate is circular, the filter plate is located in the main pipeline, and the water inlet and the water outlet are respectively located at the two ends of the main pipeline; the two branch pipelines are evenly distributed and inclined along the circumferential direction of the main pipeline, and the two branch pipelines are connected to the main pipeline. The first filter cartridge and the second filter cartridge are respectively located in the two branch pipelines.

3. A pipe filter device for building water supply and drainage engineering according to claim 2, characterized in that: The cross-sectional area of ​​the branch line is larger than the cross-sectional area of ​​the first filter cartridge.

4. A pipe filter device for building water supply and drainage engineering according to claim 2, characterized in that: The switching part includes a first flange and a first rotating rod; the first flange is detachably connected to one of the branch pipes, one end of the first rotating rod is installed on the first filter cartridge and extends through the first flange, and the switching part also includes a second flange and a second rotating rod; the second flange is detachably connected to the other branch pipe, one end of the second rotating rod is installed on the second filter cartridge and extends through the second flange.

5. A pipe filter device for building water supply and drainage engineering according to claim 4, characterized in that: A first rotating disk is disposed at one end of the first rotating rod away from the first filter cartridge, and a second rotating disk is disposed at one end of the second rotating rod away from the second filter cartridge.

6. A pipe filter device for building water supply and drainage engineering according to claim 4, characterized in that: A first elastic member is arranged between the first flange and the first filter cartridge, and the first elastic member is wound around the first rotating rod; a second elastic member is arranged between the second flange and the second filter cartridge, and the second elastic member is wound around the second rotating rod.

7. A pipe filter device for building water supply and drainage engineering according to claim 4, characterized in that: A third flange and a third rotating rod are arranged on the main pipe. The third flange is detachably mounted on the main pipe. One end of the third rotating rod is mounted on the filter plate and extends out through the third flange.

8. A pipe filter device for building water supply and drainage engineering according to claim 7, characterized in that: A first sealing strip is provided between the first filter cartridge and its corresponding branch pipe, and between the second filter cartridge and its corresponding branch pipe, a second sealing strip is provided between the first flange and its corresponding branch pipe, and between the second flange and its corresponding branch pipe, and a third sealing strip is provided between the third flange and the main pipe.

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