Conveying pipeline for indoor water supply, drainage and water supply

Abstract

The invention discloses a conveying pipeline for indoor water supply and drainage, which comprises a conveying pipe and a filter assembly, the conveying pipe is provided with a mounting hole, the filter assembly comprises a filter pipe, a first filter screen, a second filter screen and a cover body, one end of the filter pipe extends into an inner cavity of the conveying pipe through the mounting hole, and the other end of the filter pipe extends into the inner cavity of the conveying pipe. One end of the filter pipe is detachably arranged on the cover body, the other end of the filter pipe is detachably arranged on the cover body, the cover body is detachably connected with the conveying pipe, and the first filter screen and the second filter screen are arranged at the other end of the filter pipe at intervals in the extending direction of the conveying pipe so as to filter water in the conveying pipe. The conveying pipeline for indoor water supply, drainage and water supply is good in filtering effect and water supply quality.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying pipelines, and in particular to a conveying pipeline for indoor water supply and drainage. Background Art

[0002] The delivery pipelines used for indoor water supply and drainage are an important part of the building's water supply and drainage system, and are mainly used to transport domestic water, fire-fighting water, and other functional water supplies. Traditional water supply pipelines are usually made of metal (such as galvanized steel pipes, copper pipes) or plastic (such as PPR pipes, PVC pipes), and the branching and diversion of water flow are achieved through pipe connectors (such as elbows, tees, flanges, etc.). During the water supply process, impurities such as mud, rust, and microorganisms may be mixed into the pipes, affecting the water quality and the normal operation of water-using equipment. Therefore, some pipes will be equipped with filtering structures at the water inlet or key nodes to reduce the entry of impurities into the downstream pipelines.

[0003] In related technologies, a filter is usually installed in the conveying pipeline. The filter has only one layer and can only intercept larger particles of impurities, but has limited filtering effect on fine suspended matter, microorganisms, etc. Long-term use can easily lead to filter blockage or impurities penetrating, affecting the water supply quality. Moreover, the filter is mostly fixedly installed, and disassembly and assembly are cumbersome. In addition, it is difficult to quickly align the filter with the interface during installation, and the construction is difficult. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a delivery pipeline for indoor water supply and drainage, which has good filtering effect and good water supply quality.

[0005] The indoor water supply and drainage pipeline of the embodiment of the present invention includes:

[0006] a delivery pipe having a mounting hole;

[0007] A filter assembly, the filter assembly includes a filter tube, a first filter screen, a second filter screen and a cover body, one end of the filter tube extends into the inner cavity of the delivery pipe through the mounting hole, the other end of the filter tube is detachably provided on the cover body, the cover body is detachably connected to the delivery pipe, the first filter screen and the second filter screen are arranged at intervals along the extension direction of the delivery pipe at the other end of the filter tube to filter the water in the delivery pipe.

[0008] In the embodiment of the present invention, the delivery pipe for indoor water supply and drainage, the first filter screen and the second filter screen can perform secondary filtration on the water in the delivery pipe to improve the filtering effect. The other end of the filter tube is detachably connected to the cover body, which is convenient for removing the filter tube from the cover body for replacement or cleaning, thereby preventing the filter screen from being blocked or impurities from penetrating the filter screen, thereby ensuring the water supply quality. The cover body is detachably connected to the delivery pipe, which is convenient for removing the filter assembly from the delivery pipe for replacement or cleaning, thereby improving the filtering effect and service life of the filter assembly.

[0009] In some embodiments, a first opening and a second opening are oppositely and spaced apart from each other at one end of the filter tube, the first opening and the second opening are both connected to the inner cavity of the filter tube, the first filter mesh is arranged in the first opening, and the second filter mesh is arranged in the second opening.

[0010] In some embodiments, the first opening includes a first hole segment and a second hole segment that are connected, the first hole segment extending from one end of the filter tube to the other end of the filter tube, the second hole segment extending from a peripheral wall adjacent to the other end of the filter tube to one end of the filter tube and inclined toward the second opening, one end of the first filter screen is detachably connected to the inner peripheral surface of the first hole segment, and the other end of the first filter screen is detachably connected to the cover body.

[0011] The second opening includes a third hole segment and a fourth hole segment that are connected. The third hole segment extends from one end of the filter tube to the other end of the filter tube. The fourth hole segment extends from the peripheral wall adjacent to the other end of the filter tube to one end of the filter tube and is inclined toward the first opening. One end of the second filter screen is connected to the inner peripheral surface of the third hole segment, and the other end of the second filter screen is connected to the inner peripheral surface of the fourth hole segment.

[0012] In some embodiments, the indoor water supply and drainage pipeline further includes:

[0013] a connecting pipe, the connecting pipe being provided at the mounting hole and communicating with the delivery pipe, at least a portion of the filter assembly extending into the inner cavity of the delivery pipe through the connecting pipe, the filter assembly being detachably connected to the connecting pipe;

[0014] A limiting assembly, the limiting assembly comprising a limiting portion and a matching portion, the limiting portion being provided on the cover body, the matching portion being provided on the connecting pipe, and the limiting portion matching the matching portion;

[0015] A connecting component is provided on the matching portion, and is used to connect the matching portion and the cover body.

[0016] In some embodiments, there are at least two limiting portions, and at least two limiting portions are arranged at intervals along the circumference of the cover body on the outer periphery of the cover body. The limiting portion includes two limiting blocks, and the two limiting blocks are arranged at intervals along the circumference of the cover body. There are at least two matching portions, and at least two matching portions are arranged at intervals along the circumference of the connecting tube and correspond one-to-one with at least two limiting portions. The matching portion has two matching grooves arranged at intervals, and the two limiting blocks correspond one-to-one with and match the two matching grooves.

[0017] In some embodiments, the cover body has a groove adjacent to the end surface of the filter tube, the other end of the filter tube is detachably connected to the bottom surface of the groove, and the end of the connecting tube away from the delivery tube is inserted into the groove.

[0018] In some embodiments, the bottom surface of the groove has a threaded hole, the other end of the filter tube has an external thread, and the filter tube is threadedly fitted into the threaded hole.

[0019] In some embodiments, a sealing member is provided between an end of the connecting pipe away from the delivery pipe and the bottom surface of the groove, and the sealing member is arranged around the circumference of the connecting pipe.

[0020] In some embodiments, the connecting assembly includes a mounting portion, a handle and a snap-fit portion, the mounting portion is provided on the mating portion, the handle is provided on the mounting portion and is rotatable relative to the mounting portion, one end of the snap-fit portion is rotatably connected to the handle, and the other end of the snap-fit portion is used to abut against the end surface of the cover body away from the connecting tube, and the handle can drive the snap-fit portion to rotate when it rotates relative to the mounting portion.

[0021] In some embodiments, the connecting assembly further includes a first rotating shaft and a second rotating shaft, the first rotating shaft being arranged on the mounting portion, the handle being arranged on the first rotating shaft so as to be rotatable relative to the mounting portion, the second rotating shaft being arranged on the handle, and the snap-fitting portion being arranged on the second rotating shaft so as to be rotatable relative to the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall assembly of a delivery pipeline for indoor water supply and drainage according to an embodiment of the present invention.

[0023] Figure 2 It is a schematic diagram of the matching parts of the delivery pipeline for indoor water supply and drainage according to an embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of a filter assembly of a delivery pipeline for indoor water supply and drainage according to an embodiment of the present invention.

[0025] Figure 4It is a schematic diagram of the second opening of the filter assembly of the delivery pipeline for indoor water supply and drainage according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of a connection assembly of a delivery pipe for indoor water supply and drainage according to an embodiment of the present invention.

[0027] Figure markings: 1. delivery pipe; 11. mounting hole; 2. filter assembly; 21. filter pipe; 211. first opening; 2111. first hole section; 2112. second hole section; 212. second opening; 2121. third hole section; 2122. fourth hole section; 213. first chamber; 214. second chamber; 22. first filter screen; 23. second filter screen; 24. cover body; 241. groove; 3. connecting pipe; 4. limiting assembly; 41. limiting part; 411. limiting block; 42. matching part; 421. matching groove; 5. connecting assembly; 51. mounting part; 52. handle; 53. buckling part; 54. first rotating shaft; 55. second rotating shaft. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] like Figure 1-Figure 5 As shown, a delivery pipeline for indoor water supply and drainage according to an embodiment of the present invention includes a delivery pipe 1 and a filter assembly 2. The delivery pipe 1 has a mounting hole 11. The filter assembly 2 includes a filter pipe 21, a first filter screen 22, a second filter screen 23, and a cover 24. One end of the filter pipe 21 extends into the inner cavity of the delivery pipe 1 through the mounting hole 11, and the other end of the filter pipe 21 is detachably mounted on the cover 24. The cover 24 is detachably connected to the delivery pipe 1. The first filter screen 22 and the second filter screen 23 are spaced apart at the other end of the filter pipe 21 along the extension direction of the delivery pipe 1 to filter the water in the delivery pipe 1.

[0030] In the delivery pipe for indoor water supply and drainage in the embodiment of the present invention, the first filter screen 22 and the second filter screen 23 can perform secondary filtration on the water in the delivery pipe 1 to improve the filtering effect. The other end of the filter tube 21 is detachably connected to the cover body 24, which is convenient for removing the filter tube 21 from the cover body 24 for replacement or cleaning, thereby avoiding clogging of the filter screen or impurities penetrating the filter screen and ensuring the water supply quality. The cover body 24 is detachably connected to the delivery pipe 1, which is convenient for removing the filter assembly 2 from the delivery pipe 1 for replacement or cleaning, thereby improving the filtering effect and service life of the filter assembly 2.

[0031] Specifically, the delivery pipe 1 extends along a first direction, and a mounting hole 11 is formed on a wall surface of the delivery pipe 1 . The mounting hole 11 is communicated with an inner cavity of the delivery pipe 1 .

[0032] Specifically, the mesh area of the first filter 22 is larger than the mesh area of the second filter 23. The water in the delivery pipe 1 can first be filtered through the first filter 22 to filter out larger impurities, and then filtered through the second filter 23 to filter out smaller impurities. The water in the delivery pipe 1 is filtered twice by the first filter 22 and the second filter 23 to ensure the filtering effect and water supply quality. Preferably, the second filter 23 is a filter cloth.

[0033] In some embodiments, a first opening 211 and a second opening 212 are oppositely and spaced apart at one end of the filter tube 21. The first opening 211 and the second opening 212 are both connected to the inner cavity of the filter tube 21. The first filter screen 22 is provided in the first opening 211, and the second filter screen 23 is provided in the second opening 212.

[0034] Specifically, one end of the filter tube 21 is adapted to the inner wall surface of the delivery pipe 1 , and by providing the first opening 211 and the second opening 212 , it is convenient to install the first filter screen 22 and the second filter screen 23 and perform secondary filtration on the water in the delivery pipe 1 .

[0035] In some embodiments, the first opening 211 includes a connected first hole section 2111 and a second hole section 2112, the first hole section 2111 extends from one end of the filter tube 21 to the other end of the filter tube 21, and the second hole section 2112 extends from the peripheral wall adjacent to the other end of the filter tube 21 to one end of the filter tube 21 and is inclined toward the second opening 212, one end of the first filter screen 22 is detachably connected to the inner peripheral surface of the first hole section 2111, and the other end of the first filter screen 22 is detachably connected to the cover body 24.

[0036] Specifically, the first filter screen 22 is disposed within the filter tube 21 and extends along the extension direction of the filter tube 21. The first filter screen 22 divides the inner cavity of the filter tube 21 into a first chamber 213 and a second chamber 214. The first opening 211 communicates with the first chamber 213, and the second opening 212 communicates with the second chamber 214. Water in the delivery pipe 1 is filtered sequentially through the first chamber 213 and the second chamber 214, thereby improving the filtration effect. The provision of the first hole section 2111 and the second hole section 2112 increases the contact area between the first filter screen 22 and the water in the delivery pipe 1, thereby ensuring the filtration effect.

[0037] Specifically, the first filter 22 is detachably mounted to the inner circumference of the first hole section 2111 and the cover 24 by screws, so that when too much impurities accumulate on the first filter 22 , the first filter 22 can be conveniently removed for cleaning and replacement.

[0038] The second opening 212 includes a third hole section 2121 and a fourth hole section 2122 that are connected. The third hole section 2121 extends from one end of the filter tube 21 to the other end of the filter tube 21. The fourth hole section 2122 extends from the peripheral wall adjacent to the other end of the filter tube 21 to one end of the filter tube 21 and is inclined toward the first opening 211. One end of the second filter screen 23 is connected to the inner peripheral surface of the third hole section 2121, and the other end of the second filter screen 23 is connected to the inner peripheral surface of the fourth hole section 2122.

[0039] Specifically, the provision of the third hole section 2121 and the fourth hole section 2122 increases the contact area between the second filter screen 23 and the water in the delivery pipe 1 , thereby ensuring a secondary filtering effect.

[0040] In some embodiments, the delivery pipeline for indoor water supply and drainage also includes a connecting pipe 3, a limiting assembly 4 and a connecting assembly 5. The connecting pipe 3 is provided at the mounting hole 11 and is connected to the delivery pipe 1. At least a portion of the filter assembly 2 extends into the inner cavity of the delivery pipe 1 through the connecting pipe 3, and the filter assembly 2 is detachably connected to the connecting pipe 3. The limiting assembly 4 includes a limiting portion 41 and a matching portion 42. The limiting portion 41 is provided on the cover body 24, and the matching portion 42 is provided on the connecting pipe 3. The limiting portion 41 matches the matching portion 42. The connecting assembly 5 is provided on the matching portion 42. The connecting assembly 5 is used to connect the matching portion 42 and the cover body 24 so that the cover body 24 and the connecting pipe 3 are firmly connected, ensuring that the filter pipe 21 is firmly installed in the delivery pipe 1 and ensuring the filtering effect.

[0041] Specifically, one end of the connecting tube 3 is disposed at the mounting hole 11 and communicates with the inner cavity of the delivery tube 1. The other end of the connecting tube 3 extends in a direction away from the delivery tube 1. One end of the filter tube 21 extends into the inner cavity of the delivery tube 1 through the connecting tube 3. The cover 24 is detachably connected to the other end of the connecting tube 3, making it convenient to replace the filter tube 21 and clean impurities filtered out of the filter tube 21, thereby ensuring the filtering effect of the filter tube 21. When the cover 24 is connected to the connecting tube 3, the limiting portion 41 and the matching portion 42 cooperate to limit the cover 24, preventing the cover 24 from being easily affected by external forces and rotating relative to the connecting tube 3. This ensures that the water in the delivery tube 1 flows through the flow area of the first opening 211 and the second opening 212, thereby ensuring the filtering efficiency and effect. In addition, it can also serve as an auxiliary positioning function, thereby improving the efficiency of the installation of the filter assembly 2.

[0042] Specifically, the inner diameter of the connecting tube 3 is adapted to the outer diameter of the filter tube 21 , ensuring that the filter tube 21 is firmly inserted into the connecting tube 3 and is not prone to shaking.

[0043] In some embodiments, there are at least two limiting portions 41, which are spaced apart along the circumference of the cover 24 and disposed on the outer periphery of the cover 24. The limiting portion 41 includes two limiting blocks 411, which are spaced apart along the circumference of the cover 24. There are at least two matching portions 42, which are spaced apart along the circumference of the connecting tube 3 and correspond one-to-one with the at least two limiting portions 41. The matching portion 42 has two spaced apart matching grooves 421, and the two limiting blocks 411 correspond one-to-one with and match the two matching grooves 421.

[0044] Specifically, there are four limiting parts 41 and four matching parts 42. The arrangement of the four limiting parts 41 and the four matching parts 42 ensures the stability of the connection between the cover body 24 and the connecting pipe 3. The two limiting blocks 411 of the limiting part 41 correspond to and match the two matching grooves 421 of the matching part 42 one by one, thereby improving the degree of fit between the limiting part 41 and the matching part 42, and further ensuring the stability of the connection between the cover body 24 and the connecting pipe 3.

[0045] In some embodiments, the cover 24 has a groove 241 on the end surface adjacent to the filter tube 21 , the other end of the filter tube 21 is detachably connected to the bottom surface of the groove 241 , and the end of the connecting tube 3 away from the delivery tube 1 is inserted into the groove 241 .

[0046] Specifically, the outer peripheral contour of the cover body 24 is circular, and the contour formed by the inner peripheral surface of the groove 241 is also circular. The connecting tube 3 is arranged outside the filter tube 21, and the central axis of the filter tube 21, the central axis of the connecting tube 3 and the central axis of the groove 241 are collinear. The end of the connecting tube 3 away from the delivery tube 1 is inserted into the groove 241, ensuring the firmness of the connection between the connecting tube 3 and the cover body 24.

[0047] In some embodiments, the bottom surface of the groove 241 has a threaded hole (not shown), the other end of the filter tube 21 has an external thread, and the filter tube 21 is threadedly fitted into the threaded hole.

[0048] Specifically, the connection method between the filter tube 21 and the cover body 24 is simple, which makes it convenient to remove the filter tube 21 from the cover body 24 for cleaning or replacement, and is easy to operate.

[0049] In some embodiments, a seal (not shown) is provided between the end of the connecting pipe 3 away from the delivery pipe 1 and the bottom surface of the groove 241. The seal is arranged around the circumference of the connecting pipe 3, thereby improving the sealing between the connecting pipe 3 and the bottom surface of the groove 241, and ensuring that water in the delivery pipe 1 is not easy to overflow.

[0050] In some embodiments, the connecting assembly 5 includes a mounting portion 51, a handle 52 and a snap-fit portion 53. The mounting portion 51 is provided on the mating portion 42, the handle 52 is provided on the mounting portion 51 and is rotatable relative to the mounting portion 51, one end of the snap-fit portion 53 is rotatably connected to the handle 52, and the other end of the snap-fit portion 53 is used to abut against the end surface of the cover body 24 away from the connecting tube 3. The rotation of the handle 52 relative to the mounting portion 51 can drive the snap-fit portion 53 to rotate.

[0051] In some embodiments, the connecting assembly 5 also includes a first rotating shaft 54 and a second rotating shaft 55, the first rotating shaft 54 is provided on the mounting portion 51, the handle 52 is provided on the first rotating shaft 54 so as to be rotatable relative to the mounting portion 51, the second rotating shaft 55 is provided on the handle 52, and the buckling portion 53 is provided on the second rotating shaft 55 so as to be rotatable relative to the handle 52.

[0052] The working principle of the indoor water supply and drainage pipeline in the embodiment of the present invention is as follows:

[0053] When installing the filter assembly 2 in the delivery pipe 1, the filter tube 21 is passed through the connecting pipe 3 and arranged in the delivery pipe 1. The cover body 24 is arranged at the end of the connecting pipe 3 away from the delivery pipe 1, and the limit block 411 is inserted into the matching groove 421. Then, by rotating the handle 52, the other end of the snap-fit portion 53 is snapped on the cover body 24 and abutted against the end surface of the cover body 24 away from the connecting pipe 3. Then, the handle 52 is rotated to drive the snap-fit portion 53 to rotate slightly to strengthen the snap-fit connection of the snap-fit portion 53 to the cover body 24, thereby realizing the connection between the cover body 24 and the connecting pipe 3. The installation of the filter assembly 2 is completed.

[0054] When the water in the delivery pipe 1 passes through the filter tube 21, it will pass through the first filter screen 22 and the second filter screen 23 in sequence to perform a secondary filtration of impurities in the water. When cleaning impurities in the filter assembly 2, the filter assembly 2 is removed from the connecting pipe 3, and the filter tube 21 is removed from the cover 24 by rotating the filter tube 21. The filtered impurities are stored in the filter tube 21. Some impurities may remain in the cover 24. At this time, the cover 24 can be cleaned and the impurities in one of the chambers in the filter tube 21 can be poured out. Then, the screws can be removed from the first filter screen 22 to remove the first filter screen 22, making it easier to clean the impurities on the first filter screen 22 and the second filter screen 23.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0059] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0060] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A delivery pipeline for indoor water supply and drainage, characterized in that: include: A delivery pipe (1), wherein the delivery pipe (1) has a mounting hole (11); A filter assembly (2), the filter assembly (2) comprising a filter tube (21), a first filter screen (22), a second filter screen (23) and a cover body (24); one end of the filter tube (21) extends into the inner cavity of the delivery tube (1) through the mounting hole (11); the other end of the filter tube (21) is detachably arranged on the cover body (24); the cover body (24) is detachably connected to the delivery tube (1); the first filter screen (22) and the second filter screen (23) are arranged at intervals at the other end of the filter tube (21) along the extension direction of the delivery tube (1) to filter the water in the delivery tube (1).

2. The indoor water supply and drainage pipeline according to claim 1, characterized in that: One end of the filter tube (21) is provided with a first opening (211) and a second opening (212) opposite to each other and spaced apart. The first opening (211) and the second opening (212) are both connected to the inner cavity of the filter tube (21). The first filter screen (22) is provided in the first opening (211), and the second filter screen (23) is provided in the second opening (212).

3. The indoor water supply and drainage pipeline according to claim 2, characterized in that: The first opening (211) comprises a first hole section (2111) and a second hole section (2112) which are connected to each other. The first hole section (2111) extends from one end of the filter tube (21) to the other end of the filter tube (21). The second hole section (2112) extends from a peripheral wall adjacent to the other end of the filter tube (21) to one end of the filter tube (21) and is inclined toward the second opening (212). One end of the first filter screen (22) is detachably connected to the inner peripheral surface of the first hole section (2111), and the other end of the first filter screen (22) is detachably connected to the cover body (24). The second opening (212) comprises a third hole section (2121) and a fourth hole section (2122) which are connected to each other. The third hole section (2121) extends from one end of the filter tube (21) to the other end of the filter tube (21). The fourth hole section (2122) extends from the peripheral wall adjacent to the other end of the filter tube (21) to one end of the filter tube (21) and is inclined toward the first opening (211). One end of the second filter screen (23) is connected to the inner peripheral surface of the third hole section (2121), and the other end of the second filter screen (23) is connected to the inner peripheral surface of the fourth hole section (2122).

4. The indoor water supply and drainage pipeline according to any one of claims 1 to 3, characterized in that: Also includes: a connecting pipe (3), the connecting pipe (3) being arranged at the mounting hole (11) and communicating with the delivery pipe (1), at least a portion of the filter assembly (2) extending into the inner cavity of the delivery pipe (1) through the connecting pipe (3), the filter assembly (2) being detachably connected to the connecting pipe (3); A limiting assembly (4), the limiting assembly (4) comprising a limiting portion (41) and a matching portion (42), the limiting portion (41) being provided on the cover body (24), the matching portion (42) being provided on the connecting pipe (3), the limiting portion (41) matching the matching portion (42); A connecting component (5) is provided on the matching portion (42), and the connecting component (5) is used to connect the matching portion (42) and the cover body (24).

5. The indoor water supply and drainage pipeline according to claim 4, characterized in that: There are at least two limiting portions (41), and at least two limiting portions (41) are arranged at intervals along the circumference of the cover body (24) on the outer periphery of the cover body (24). The limiting portion (41) includes two limiting blocks (411), and the two limiting blocks (411) are arranged at intervals along the circumference of the cover body (24). There are at least two matching portions (42), and at least two matching portions (42) are arranged at intervals along the circumference of the connecting pipe (3) and correspond one-to-one with the at least two limiting portions (41). The matching portion (42) has two matching grooves (421) arranged at intervals, and the two limiting blocks (411) correspond one-to-one with the two matching grooves (421) and match with each other.

6. The indoor water supply and drainage pipeline according to claim 4, characterized in that: The cover (24) has a groove (241) on the end surface adjacent to the filter tube (21); the other end of the filter tube (21) is detachably connected to the bottom surface of the groove (241); and the end of the connecting tube (3) away from the delivery tube (1) is inserted into the groove (241).

7. The indoor water supply and drainage pipeline according to claim 6, characterized in that: The bottom surface of the groove (241) has a threaded hole, the other end of the filter tube (21) has an external thread, and the filter tube (21) is threadedly fitted in the threaded hole.

8. The indoor water supply and drainage pipeline according to claim 6, characterized in that: A sealing member is provided between the end of the connecting pipe (3) away from the delivery pipe (1) and the bottom surface of the groove (241), and the sealing member is arranged around the circumference of the connecting pipe (3).

9. The indoor water supply and drainage pipeline according to claim 4, characterized in that: The connecting assembly (5) comprises a mounting portion (51), a handle (52) and a buckling portion (53); the mounting portion (51) is provided on the matching portion (42); the handle (52) is provided on the mounting portion (51) and is rotatable relative to the mounting portion (51); one end of the buckling portion (53) is rotatably connected to the handle (52); the other end of the buckling portion (53) is used to abut against the end surface of the cover body (24) away from the connecting tube (3); the handle (52) rotates relative to the mounting portion (51) to drive the buckling portion (53) to rotate.

10. The indoor water supply and drainage pipeline according to claim 9, characterized in that: The connecting assembly (5) further comprises a first rotating shaft (54) and a second rotating shaft (55), wherein the first rotating shaft (54) is provided on the mounting portion (51), the handle (52) is provided on the first rotating shaft (54) so as to be rotatable relative to the mounting portion (51), the second rotating shaft (55) is provided on the handle (52), and the buckling portion (53) is provided on the second rotating shaft (55) so as to be rotatable relative to the handle (52).

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