Sewer

Abstract

This invention provides a drain assembly, belonging to the field of drainage technology. It solves the problem of poor versatility in existing drain assemblies. The drain assembly includes a main pipe with an overflow hole on its side, and an inner tube whose outer diameter matches the inner diameter of the main pipe. The outer surface of the inner tube is a smooth cylindrical surface. The main pipe has a detachable connection structure that allows the inner tube to be inserted into the main pipe and to seal and position it. The main pipe also has a blocking part that abuts against one end of the inner tube. By incorporating a detachable connection structure on the main pipe and an inner tube that fits into the inner diameter of the main pipe, this drain assembly can be used in various working environments, improving its applicability. It is also very convenient to operate and has a relatively simple structure.

Description

Technical Field

[0001] This invention belongs to the field of drainage technology and relates to drainers. Background Technology

[0002] A drain assembly is typically installed at the drain hole of a basin or bathtub for drainage or water storage as needed. The most common and simplest drain assembly on the market is the direct-flush type. It consists of a main pipe with a shoulder at the upper side and a cover at the upper end. The cover is either an integral part of the main pipe with several drainage holes or a flip-top. During installation, the main pipe is passed through the drain hole of the basin or bathtub from top to bottom. The shoulder rests against the inner bottom wall of the basin or bathtub, and then a locking nut is threaded onto the lower end of the main pipe to secure it to the basin or bathtub.

[0003] Taking washbasins as an example, washbasins on the market are currently divided into those with overflow function and those without overflow function. Correspondingly, the main pipe of the ground water pipe is also set to two structures: with overflow hole and without overflow hole. A single drain pipe cannot be used interchangeably with washbasins with different functions. Therefore, the appropriate drain pipe is usually selected according to the function of the washbasin: washbasins with overflow function are equipped with drain pipes with overflow holes, and washbasins without overflow function are equipped with drain pipes without overflow holes. If the selection is not appropriate, problems such as water leakage and failure to achieve the function will occur. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a drain device that solves the problem of poor versatility.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A drain assembly includes a main pipe with an overflow hole on its side. The drain assembly further includes an inner tube whose outer diameter matches the inner hole of the main pipe. The outer surface of the inner tube is a smooth cylindrical surface. The main pipe is provided with a detachable connection structure that allows the inner tube to be inserted into the main pipe and to seal and position the inner tube. The main pipe is provided with a blocking part that abuts against one end of the inner tube.

[0007] This drain has two operating modes: Taking a washbasin as an example, when the washbasin has an overflow function, the inner tube is not inserted into the main pipe. At this time, the overflow hole on the main pipe is open, and water exceeding the water level in the washbasin will flow into the outside of the washbasin through the hole on the washbasin, and finally flow into the main pipe from the overflow hole on the main pipe and be discharged. When the washbasin does not have an overflow function, before installing the drain, simply operate the detachable connection structure to insert the inner tube into the main pipe, with one end of the inner tube abutting against the blocking part inside the main pipe. Then operate the detachable connection structure to position and seal the inner tube inside the main pipe. Since the outer diameter of the inner tube matches the inner hole of the main pipe, the overflow hole is blocked by the inner tube. In this way, this drain can be used with washbasins that do not have an overflow function.

[0008] By incorporating a detachable connection structure on the main pipe, the drain assembly's usage can be altered by inserting or removing the inner pipe. This allows the drain assembly to be used in various working environments, improving its versatility. Furthermore, it is very convenient to operate and has a relatively simple structure. Additionally, the inner pipe is inserted into the main pipe for connection, thus not altering the original installation method of the drain assembly and the countertop.

[0009] In the aforementioned drain assembly, the drain assembly also includes an end cap, with an annular protrusion on the lower side of the end cap, and a detachable connection structure located between the annular protrusion and the upper end of the main pipe.

[0010] The detachable connection structure is located between the annular protrusion and the upper end of the main pipe, allowing users to change the function of the drain by removing the end cap and inserting or removing the inner pipe. This makes the drain universally compatible with sinks with or without overflow functions. Normally, the main pipe and end cap are fixed together and cannot be disassembled.

[0011] In the aforementioned drain assembly, the detachable connection structure includes a threaded structure that connects the annular protrusion to the upper end of the main pipe and a sealing ring disposed inside the annular protrusion, the sealing ring cooperating with the upper end of the inner pipe to form a seal.

[0012] When used with a basin without an overflow function, unscrew the end cap from the top of the main pipe using the threaded mechanism. Then, insert the inner tube from the top of the main pipe and reconnect the end cap to the top of the main pipe using the threaded mechanism. Simultaneously, the sealing ring on the inner side of the annular protrusion engages with the top of the inner tube to form a seal. This secures and seals the inner tube within the main pipe. When used with a basin with an overflow function, simply unscrew the end cap from the top of the main pipe using the threaded mechanism, remove the inner tube from the main pipe, and then reconnect the end cap.

[0013] In the aforementioned drain assembly, as another technical solution, the detachable connection structure includes a snap-fit ​​structure that connects the annular protrusion to the upper end of the main pipe and a sealing ring disposed on the inner side of the annular protrusion, the sealing ring cooperating with the upper end of the inner pipe to form a seal.

[0014] When using with a basin without an overflow function, remove the end cap from the top of the main pipe using the snap-fit ​​mechanism. Then, insert the inner tube from the top of the main pipe and reconnect the end cap to the top of the main pipe using the snap-fit ​​mechanism. Simultaneously, the sealing ring on the inner side of the annular protrusion will engage with the top of the inner tube to form a seal. This establishes a position and seal for the inner tube within the main pipe. When using with a basin with an overflow function, simply unscrew the end cap from the top of the main pipe using the snap-fit ​​mechanism, remove the inner tube from the main pipe, and then reconnect the end cap.

[0015] In the aforementioned drain assembly, the blocking part is annular and integrally formed on the inner side of the lower end of the main pipe.

[0016] In the aforementioned drain assembly, the inner side of the annular protrusion is provided with an annular groove, the outer edge of the sealing ring is embedded in the annular groove and the sealing ring part extends out of the annular groove, the sealing ring extending out of the annular groove abuts against the upper end face of the inner tube, or the inner edge of the sealing ring extending out of the annular groove abuts against the outer circumferential surface of the upper end of the inner tube and the upper end face of the inner tube abuts against the end cap.

[0017] After the inner tube is inserted into the main tube, the sealing ring extending out of the annular groove abuts against the upper end face of the inner tube, thus forming a seal between them. Furthermore, the lower end of the inner tube abuts against the blocking part, while the upper end face of the inner tube abuts against the sealing ring, thereby positioning the inner tube within the main tube.

[0018] In another scenario, after the inner tube is inserted into the main tube, the upper end of the inner tube passes through the sealing ring, causing the inner edge of the sealing ring to abut against the outer circumference of the upper end of the inner tube, thus forming a seal. Furthermore, the lower end of the inner tube abuts against the blocking part, while the upper end face of the inner tube abuts against the end cap, thereby positioning the inner tube within the main tube.

[0019] In the aforementioned drain assembly, the sealing ring extending out of the annular groove abuts against the upper end face of the main pipe.

[0020] Regardless of whether an inner tube is placed inside the main tube, the sealing ring abuts against the upper surface of the main tube to ensure a seal between the main tube and the end cap, thereby preventing leakage caused by the two being designed to be detachable.

[0021] In the aforementioned drain assembly, as another technical solution, the drain assembly also includes a drain pipe assembly. The detachable connection structure includes a threaded structure that connects the drain pipe assembly to the lower end of the main pipe and a sealing gasket disposed inside the drain pipe assembly. The sealing gasket cooperates with the lower end of the inner pipe to form a seal.

[0022] The drain pipe assembly is threaded to the lower end of the main pipe, allowing users to change the function of the drain by disassembling the assembly and inserting or removing the inner pipe. This makes the drain universally usable in sinks with or without overflow functions.

[0023] In the aforementioned drain assembly, the blocking part is annular and integrally formed on the inner side of the upper end of the main pipe.

[0024] In the aforementioned drain assembly, the sealing gasket abuts against the lower end face of the main pipe.

[0025] Compared to existing technologies, this drain assembly features a detachable connection structure on the main pipe, combined with an inner tube that fits into the main pipe's inner diameter. This allows the drain assembly to be used in various working environments, improving its applicability. It is also very convenient to operate and has a relatively simple structure. Furthermore, since the inner tube is inserted into the main pipe, it does not alter the original installation method of the drain assembly and the countertop. Attached Figure Description

[0026] Figure 1 This is a longitudinal sectional view of the drain device (without the inner pipe inserted into the pipe body) in Embodiment 1.

[0027] Figure 2 This is a longitudinal sectional view of the connecting sleeve in Embodiment 1.

[0028] Figure 3 This is a longitudinal sectional view of the drain device (with the inner tube inserted into the pipe body) in Example 1.

[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0030] Figure 5 yes Figure 3 A schematic diagram of the decomposition under the given conditions.

[0031] Figure 6 This is a longitudinal sectional view of the drain device (with the inner tube inserted into the pipe body) in Example 3.

[0032] Figure 7 yes Figure 6 A schematic diagram of the decomposition under the given conditions.

[0033] In the diagram, 1. Main pipe; 1a. Overflow hole; 1b. Blocking part; 1c. Raised ring; 1d. Annular shoulder; 1e. Raised shoulder; 2. Inner pipe; 3. End cap; 3a. Leakage hole; 3b. Annular protrusion; 3b1. Boss; 3b2. Annular groove; 4. Sealing ring; 5. Upper sealing gasket; 6. Lower sealing gasket; 7. Gasket; 8. Locking nut; 9. Drain extension pipe; 10. Drain pipe assembly; 10a. Drain pipe; 10b. Mounting nut; 11. Sealing washer; 12. Spring core. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] Example 1

[0036] like Figure 1 As shown, the drain assembly includes a main pipe 1 and an end cap 3 connected to the upper end of the main pipe 1. The outer diameter of the end cap 3 is larger than the outer diameter of the main pipe 1. Several drainage holes 3a are provided through the end cap 3. Two overflow holes 1a are provided through the side of the main pipe 1 near the upper end and are arranged symmetrically. The main pipe 1 is covered with an upper sealing gasket 5, a lower sealing gasket 6, and a gasket 7. A locking nut 8 is also threaded onto the outside of the main pipe 1. A drain extension pipe 9 is threaded onto the lower end of the main pipe 1. Taking its use in a washbasin as an example, during installation, first remove the lower sealing gasket 6, gasket 7, and locking nut 8 from the main pipe 1. Then, extend the lower end of the main pipe 1 through the drain hole on the bottom of the washbasin. Next, place the lower sealing gasket 6 and gasket 7 onto the lower end of the main pipe 1 in sequence. Finally, thread the locking nut 8 onto the lower end of the main pipe 1 to lock it in place. In this way, the upper sealing gasket 5 is pressed against the inner bottom wall of the washbasin by the end cap 3, while the lower sealing gasket 6 is pressed against the bottom of the washbasin by the locking nut 8, thereby fixing the main pipe 1 and the washbasin together.

[0037] like Figure 1 and Figure 2As shown, this drain further includes an inner tube 2 whose outer diameter matches the inner hole of the main pipe 1. The inner tube 2 is specifically made of ABS material, and its outer surface is a smooth cylindrical surface. The main pipe 1 is provided with a detachable connection structure that allows the inner tube 2 to be inserted into the main pipe 1 and to seal and position the inner tube 2. The main pipe 1 also has a blocking part 1b that abuts against one end of the inner tube 2. The lower side of the end cap 3 is provided with an annular protrusion 3b, and the detachable connection structure is located between the annular protrusion 3b and the upper end of the main pipe 1. Specifically, the detachable structure includes a threaded structure (or a snap-fit ​​structure) that connects the annular protrusion 3b to the upper end of the main pipe 1, and a sealing ring 4 located inside the annular protrusion 3b. The sealing ring 4 cooperates with the upper end of the inner tube 2 to form a seal. An annular protrusion 3b has an annular groove 3b2 on its inner side. The outer edge of the sealing ring 4 is embedded in the annular groove 3b2, and part of the sealing ring 4 extends out of the annular groove 3b2. The sealing ring 4 extending out of the annular groove 3b2 simultaneously abuts against the upper end face of the inner tube 2 and the upper end face of the main tube 1 to form a seal. The lower end of the annular protrusion 3b has a boss 3b1 on its inner circumferential surface. The center hole of the boss 3b1 has an internal thread. The upper end of the main tube 1 has an external thread. The upper end of the main tube 1 is threaded into the boss 3b1, and an annular groove 3b2 is formed between the upper end face of the boss 3b1 and the lower surface of the end cap 3. A raised ring 1c is integrally formed on the inner side of the lower end of the main tube 1. The center hole of the raised ring 1c has an internal thread. The upper end of the drain extension pipe 9 is threaded into the raised ring 1c. The blocking part 1b is the upper end face of the raised ring 1c.

[0038] This drain has two operating states. One operating state is as follows: As shown in Figure 1, when the installed basin has an overflow function, the inner pipe 2 is not inserted into the main pipe 1. At this time, the overflow hole 1a on the main pipe 1 is open. Water exceeding the water level in the basin will flow into the outside of the basin through the hole on the basin and finally flow into the main pipe 1 from the overflow hole 1a on the main pipe 1 for discharge. In this state, the sealing ring 4 on the inner side of the annular protrusion 3b abuts against the upper end of the main pipe 1 to form a seal, so as to ensure the sealing performance of the main pipe 1.

[0039] Another usage scenario is: such as Figure 3 and Figure 4 As shown, when the installed basin does not have an overflow function, the end cap 3 is removed from the main pipe 1 via a threaded structure. Then, the inner tube 2 is inserted into the main pipe 1, and the end cap 3 is reconnected to the upper end of the main pipe 1. Since the outer diameter of the inner tube 2 matches the inner hole of the main pipe 1, the overflow hole 1a can be blocked by the inner tube 2, i.e., the overflow hole 1a is blocked. In this state, the part of the sealing ring 4 extending out of the annular groove 3b2 will simultaneously abut against the upper end face of the main pipe 1 and the upper end face of the inner tube 2 to form a seal, ensuring sealing performance. At the same time, the lower end of the inner tube 2 abuts against the blocking part 1b inside the main pipe 1, while the upper end face of the inner tube 2 abuts against the sealing ring 4, thus positioning the inner tube 2 inside the main pipe 1.

[0040] Example 2

[0041] This embodiment is basically the same in structure and principle as Embodiment 1, except that: in this embodiment, as Figure 7 As shown, after the inner tube 2 is inserted into the main tube 1, the upper end of the inner tube 2 is higher than the upper end of the main tube 1. The upper end of the inner tube 2 can pass through the sealing ring 4 and abut against the lower surface of the end cap 3. At this time, the sealing ring 4 extending out of the annular groove 3b2 abuts against the upper end surface of the main tube 1 to form a seal, and the inner edge of the sealing ring 4 abuts against the outer circumferential surface of the upper end of the inner tube 2 to form a seal.

[0042] Example 3

[0043] like Figure 6 and Figure 7 As shown, the drain assembly includes a main pipe 1 and a spring-loaded core 12 disposed within the upper end of the main pipe 1. The upper end of the main pipe 1 has an annular shoulder 1d. Two overflow holes 1a are provided through the side of the main pipe 1 near the upper end and are arranged symmetrically. The main pipe 1 is covered with an upper sealing gasket 5, a lower sealing gasket 6, and a gasket 7. A locking nut 8 is also threaded onto the outside of the main pipe 1. A drain pipe assembly 10 is connected to the lower end of the main pipe 1. Taking its use in a washbasin as an example, during installation, first remove the lower sealing gasket 6, gasket 7, and locking nut 8 from the main pipe 1. Then, extend the lower end of the main pipe 1 through the drain hole on the bottom of the washbasin. Next, place the lower sealing gasket 6 and gasket 7 onto the lower end of the main pipe 1 in sequence. Finally, thread the locking nut 8 onto the lower end of the main pipe 1 to lock it in place. In this way, the upper sealing gasket 5 is pressed against the inner bottom wall of the washbasin by the annular shoulder 1d, while the lower sealing gasket 6 is pressed against the bottom of the washbasin by the locking nut 8, thereby fixing the main pipe 1 and the washbasin together.

[0044] Furthermore, this drain assembly also includes an inner tube 2 whose outer diameter matches the inner hole of the main pipe 1. The inner tube 2 is specifically made of ABS material, and its outer surface is a smooth cylindrical surface. The main pipe 1 is provided with a detachable connection structure that allows the inner tube 2 to be inserted into the main pipe 1 and to seal and position the inner tube 2. The main pipe 1 also has a blocking part 1b that abuts against one end of the inner tube 2. The detachable structure includes a threaded structure that connects the drain pipe assembly 10 to the lower end of the main pipe 1 and a sealing washer 11 disposed inside the drain pipe assembly 10. The sealing washer 11 abuts against the lower end of the inner tube 2 to form a seal. Specifically, the drain pipe assembly 10 includes a drain pipe 10a with a lug on its upper outer side and a mounting nut 10b fitted over the upper end of the drain pipe 10a. The sealing washer 11 is sandwiched between the upper end face of the drain pipe 10a and the lower end face of the main pipe 1, and the mounting nut 10b is threadedly connected to the lower end of the main pipe 1 to connect the drain pipe 10a to the main pipe 1. The upper inner side of the main tube 1 has an annular shoulder 1e, the lower part of the bouncing core 12 abuts against the upper surface of the shoulder 1e, and the blocking part 1b is the lower surface of the shoulder 1e.

[0045] This drain has two operating modes. One operating mode is as follows: When the installed basin has an overflow function, the inner pipe 2 is not inserted into the main pipe 1. At this time, the overflow hole 1a on the main pipe 1 is open. Water that exceeds the water level in the basin will flow into the outside of the basin through the hole on the basin and finally flow into the main pipe 1 from the overflow hole 1a on the main pipe 1 for discharge.

[0046] Another usage scenario is: such as Figure 6 and Figure 7 As shown, when the installed basin does not have an overflow function, the drain pipe assembly 10 is removed from the main pipe 1, and then the inner pipe 2 is inserted into the main pipe 1 and reconnected to the drain pipe assembly 10. Since the outer diameter of the inner pipe 2 matches the inner hole of the main pipe 1, the overflow hole 1a is blocked by the inner pipe 2, i.e., the overflow hole 1a is blocked. In this state, the lower end face of the main pipe 1 and the lower end of the inner pipe 2 simultaneously abut against the sealing gasket 11 to form a seal, ensuring sealing performance. At the same time, the upper end face of the inner pipe 2 abuts against the blocking part 1b, while the lower end of the inner pipe 2 abuts against the sealing gasket 11, thus positioning the inner pipe 2 within the main pipe 1.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A drain assembly, comprising a main pipe (1) having an overflow hole (1a) on its side, characterized in that, This drain assembly also includes an inner tube (2) whose outer diameter matches the inner hole of the main pipe (1). The outer surface of the inner tube (2) is a smooth cylindrical surface. The main pipe (1) is provided with a detachable connection structure that allows the inner tube (2) to be inserted into the main pipe (1) and seals and positions the inner tube (2). The main pipe (1) is provided with a blocking part (1b). This drain assembly also includes an end cap (3). The lower side of the end cap (3) is provided with an annular protrusion (3b). The detachable connection structure is provided on the annular protrusion. Between the upper end of the inner tube (2) and the upper end of the main tube (1), the lower end of the inner tube (2) abuts against the blocking part (1b). The inner side of the annular protrusion (3b) is provided with an annular groove (3b2). A sealing ring (4) is provided in the annular groove (3b2). The sealing ring (4) extends out of the annular groove (3b2). The sealing ring (4) extending out of the annular groove (3b2) abuts against the upper end face of the inner tube (2). The sealing ring (4) extending out of the annular groove (3b2) abuts against the upper end face of the main tube (1).

2. The drain device according to claim 1, characterized in that, The detachable connection structure includes a threaded structure that connects the annular protrusion (3b) to the upper end of the main tube (1) and a sealing ring (4) disposed inside the annular protrusion (3b), the sealing ring (4) cooperating with the upper end of the inner tube (2) to form a seal.

3. The drain device according to claim 1, characterized in that, The detachable connection structure includes a snap-fit ​​structure that connects the annular protrusion (3b) to the upper end of the main tube (1) and a sealing ring (4) disposed inside the annular protrusion (3b). The sealing ring (4) cooperates with the upper end of the inner tube (2) to form a seal.

4. The drain device according to claim 2 or 3, characterized in that, The blocking part (1b) is annular and integrally formed on the inner side of the lower end of the main pipe (1).

5. A drain assembly, comprising a main pipe (1) with an overflow hole (1a) on its side, characterized in that, This drain assembly also includes an inner tube (2) whose outer diameter matches the inner hole of the main pipe (1). The outer surface of the inner tube (2) is a smooth cylindrical surface. The main pipe (1) is provided with a detachable connection structure that allows the inner tube (2) to be inserted into the main pipe (1) and seals and positions the inner tube (2). The main pipe (1) is provided with a blocking part (1b). This drain assembly also includes a drain pipe assembly (10). The detachable connection structure includes a screw that connects the drain pipe assembly (10) to the lower end of the main pipe (1). The drain pipe assembly (10) has a textured structure and includes a drain pipe (10a) with a lug on the outer side of the upper end and a mounting nut (10b) fitted on the upper end of the drain pipe (10a). A sealing gasket (11) is provided between the upper end face of the drain pipe (10a) and the lower end face of the main pipe (1). The inner diameter of the sealing gasket (11) is smaller than the inner diameter of the main pipe (1). The upper end of the inner pipe (2) abuts against the blocking part (1b), and the lower end of the inner pipe (2) abuts against the sealing gasket (11).

6. The drain device according to claim 5, characterized in that, The blocking part (1b) is annular and integrally formed on the inner side of the upper end of the main pipe (1).

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