Height-adjustable secondary drainer

Abstract

A height-adjustable secondary drainer comprises a drainage pipe and a floor drain pipe, the diameter of the floor drain pipe is larger than that of the drainage pipe, the floor drain pipe and the drainage pipe are connected into a whole through a big-end-up reducer pipe, the height-adjustable secondary drainer further comprises a filter cover, and the lower end of the filter cover is concaved upwards and inwards to form a drainage area. A mounting hole is formed in the center of the filter cover; a plurality of filter grooves are formed in the outer cylindrical surface of the filter cover and are communicated with the drainage area; an external thread is arranged on the outer cylindrical surface of the floor drain pipe, an internal thread is arranged in the mounting hole, the filter cover is screwed and mounted on the external thread of the floor drain pipe through the internal thread, and the relative height between the filter cover and the floor drain pipe is adjusted by rotating the filter cover. The floor drain has the advantages that the relative height between the filter cover and the floor drain pipe which are in threaded connection can be adjusted, the filter cover and the floor drain pipe can be locked through threads, it is guaranteed that the height is not changed after installation is completed, and the problem that drainage efficiency is reduced or a drainage system runs unstably due to displacement is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of building drainage, in particular to a height-adjustable secondary drainer. Background Art

[0002] Currently, bathroom floors typically consist of three layers: a waterproof layer, a mortar layer, and a tile layer. In this structure, traditional floor drains primarily drain water from the tile layer and direct it into the sewer. However, when cracks develop in the tile layer, water can flow through the cracks into the mortar layer, causing water accumulation. Because traditional floor drains are designed only to drain water from the tile layer, they are unable to effectively handle water accumulation in the mortar layer. Over time, this water gradually seeps into the floor and walls, causing problems such as water seepage and mildew, which can cause significant inconvenience and repair costs for residents.

[0003] To address this issue, some improved technologies have emerged on the market. For example, the utility model patent "Drainer and Drainage System," with application number 201720652712.0 and a grant announcement date of May 4, 2018, proposes a solution for installing a drainer between the floor drain and the sewer pipe to address water accumulation in the mortar layer. This design, while somewhat addressing the shortcomings of traditional floor drains in drainage, still has several limitations that hinder its practical effectiveness and widespread adoption.

[0004] First, the drain device used in this technology suffers from pipe diameter mismatch. Due to its small diameter, it is not compatible with common sewer pipes and floor drains on the market. This requires users to select the appropriate accessories during installation, increasing installation complexity and limiting its application range.

[0005] Secondly, overflow is a major concern with existing technologies. The drain drain drains water from the mortar layer along its inner wall through drain holes that connect the inside and outside of the drain. However, this design significantly increases the risk of overflow from accumulated water or sewage in the bathroom through the pipes. Especially in the event of pressure imbalance, water and gas can flow back into the bathroom through the mortar layer and tile cracks, causing secondary contamination.

[0006] Third, existing secondary drains are usually divided into 50 models and 75 models according to the pipe diameter standard, which are suitable for 50 pipes and 75 pipes respectively. However, these two models are not universal, and users need to pay special attention to the specifications of the pipes when purchasing. If the wrong purchase is made, it will not only lead to failure to install normally, but may also cause problems in subsequent use. At the same time, the height design of existing drains is also fixed, and the construction height of the bathroom floor is not always consistent. If the reserved height of the drain pipe does not match the design height of the drain, the filter may separate from the ground, causing sand and debris to enter the pipe, further blocking the drainage system and affecting normal use.

[0007] Finally, existing drain designs lack a lockable height between the filter cover and the drain pipe. During installation, the filter cover is prone to shifting due to the lack of an adjustable fixture. This not only affects drainage efficiency but can also cause the drain to lose its long-term stability and fail. Therefore, further improvements are necessary. Utility Model Content

[0008] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a height-adjustable secondary drainer with a simple structure, easy use, and the ability to lock the relative height between the filter cover and the floor drain pipe to prevent displacement.

[0009] The purpose of the utility model is achieved in the following way: a height-adjustable secondary drainer, which includes a drain pipe and a floor drain pipe, wherein the diameter of the floor drain pipe is larger than that of the drain pipe, and the two are connected as a whole by a reducer with a larger diameter at the top and a smaller diameter at the bottom, and further includes a filter cover, the lower end of the filter cover is upwardly concave to form a drainage area, and a mounting hole is opened at the center of the filter cover, and the filter cover is sleeved on the outer cylindrical surface of the floor drain pipe through the mounting hole;

[0010] The outer cylindrical surface of the filter cover is provided with a plurality of filter slots, which are connected to the drainage area;

[0011] The outer cylindrical surface of the floor drain pipe is provided with an external thread, and the mounting hole is provided with an internal thread. The filter cover is screwed onto the external thread of the floor drain pipe through the internal thread, and the relative height between the filter cover and the floor drain pipe is adjusted by rotating the filter cover.

[0012] Furthermore, a sleeve is extended upward from the upper end surface of the filter cover, the hollow interior of the sleeve is communicated with the mounting hole, and the internal thread is arranged on the inner hole of the sleeve.

[0013] Furthermore, the drainage pipe, floor drain pipe and reducer are integrally injection-molded from PVC material.

[0014] Furthermore: the filter cover and sleeve are integrally injection-molded from PVC material.

[0015] Furthermore: the filter tank is arranged to pass through the lower end surface of the filter cover.

[0016] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0017] 2. The variable diameter secondary drainer of this utility model adopts a variable diameter pipe design, which can match the commonly used sewer pipes and floor drains on the market at the same time. There is no need to purchase different models of drainers according to different pipe diameters, which increases the convenience of use and avoids the trouble of users being unable to use the product due to incorrect purchase.

[0018] 3. Several filter slots on the filter cover are connected to the drainage area, so that the accumulated water can be drained away quickly, which improves the drainage efficiency, reduces the retention time of accumulated water in the mortar layer, and fundamentally solves the problem of water accumulation in the mortar layer.

[0019] 4. The filter cover of the present invention connects to the floor drain pipe via a threaded structure. Users can adjust the relative height of the filter cover to the floor drain pipe by rotating it. This height adjustment mechanism allows the drainer to adapt to installation environments at different heights. Especially when the floor construction height is inconsistent, it can ensure that the filter cover fits tightly against the ground, effectively preventing debris such as sand and stones from entering the drainage pipe, reducing the risk of pipe blockage.

[0020] 5. The relative height between the filter cover and the floor drain pipe connected by threads is adjustable and can be locked by threads to ensure that the height does not change after installation, avoiding problems such as reduced drainage efficiency or unstable operation of the drainage system due to displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a rendering of the filter cover in the high position in the structure of the utility model.

[0022] Figure 2 This is a rendering of the filter cover in the low position in the structure of the utility model.

[0023] Figure 3 、 4 This is a structural exploded view of the utility model.

[0024] Figure 5 This is a cross-sectional view of the structure of the utility model. DETAILED DESCRIPTION

[0025] The present invention is further described below in detail with reference to the accompanying drawings. A height-adjustable secondary drain device includes a drain pipe 1 and a floor drain pipe 2. The floor drain pipe 2 has a larger diameter than the drain pipe 1 and is integrally connected by a reducer 3, which is larger at the top and smaller at the bottom. The device also includes a filter cover 4, the lower end of which is upwardly concave to form a drainage area 41. A mounting hole 42 is defined at the center of the filter cover, and the filter cover 4 is mounted on the outer cylindrical surface of the floor drain pipe 2 through the mounting hole 42.

[0026] The outer cylindrical surface of the filter cover 4 is provided with a plurality of filter slots 43 , and the filter slots 43 are connected to the drainage area 41 ;

[0027] An external thread 21 is provided on the outer cylindrical surface of the floor drain pipe 2, and an internal thread 45 is provided in the mounting hole 42. The filter cover 4 is screwed onto the external thread 21 of the floor drain pipe 2 through the internal thread 45. The relative height between the filter cover 4 and the floor drain pipe 2 can be adjusted by rotating the filter cover 4.

[0028] A sleeve 44 is further extended upward from the upper end surface of the filter cover 4 . The sleeve 44 is hollow inside and communicates with the mounting hole 42 . The internal thread 45 is provided on the inner hole of the sleeve 44 .

[0029] The drainage pipe 1, floor drain pipe 2 and reducer 3 are integrally injection-molded from PVC material.

[0030] The filter cover 4 and the sleeve 44 are integrally injection-molded from PVC material.

[0031] The filter tank 43 is provided through the lower end surface of the filter cover 4 .

[0032] Working principle: The variable diameter secondary drainer of this utility model realizes the functions of efficient drainage and overflow prevention through the coordinated action of the following components. Its working principle is as follows:

[0033] In this case, the variable diameter secondary drainer includes a drain pipe 1 and a floor drain pipe 2, wherein the diameter of the floor drain pipe 2 is larger than the diameter of the drain pipe 1. The two are connected as a whole through a reducer 3 that is larger at the top and smaller at the bottom. The upper end diameter of the reducer 3 is larger than the lower end diameter, so that the floor drain pipe and the drain pipe can be smoothly connected to form a stable drainage path. Common sewer pipes on the market are usually 50mm and 75mm in diameter. Therefore, in order to match the above two pipes, the outer diameter of the drain pipe in this case is about 45mm, and the floor drain pipe is designed to have a diameter of about 80mm.

[0034] After the drain pipe is inserted into the sewer pipe, a filter cap is mounted on the surface of the floor drain pipe so that the lower end surface of the filter cap is flush with the surface of the mortar layer. Therefore, when water seeps into the mortar layer, the water passes through the filter tank 43 and enters the drainage area, and is eventually discharged through the nozzle of the sewer pipe. The floor drain is directly docked and mounted on top of the floor drain pipe. The water discharged from the floor drain is directly discharged into the sewer pipe 7 through the floor drain pipe and the drain pipe. Since the bottom of the floor drain pipe extends below the nozzle of the sewer pipe, it can effectively prevent the leaked water from flowing back into the mortar layer through the drain pipe.

[0035] The filter slots 43 on the filter cover 4 are designed as through slots that penetrate the cylindrical surface and lower end surface of the filter cover 4, and the shape of the filter slots 43 can be a rectangular slot, a U-shaped slot, or a circular slot. These filter slots ensure that water can be discharged quickly, preventing water accumulation in the mortar layer due to poor water flow. At the same time, the setting of the filter slots can also effectively isolate sand and gravel, preventing sand and gravel and other debris from entering the pipes when laying floor tiles and blocking secondary drainage. In addition, the filter slots are distributed in a circular array, so that water seeping from all directions can enter the sewer pipe through the shortest path and be discharged, further reducing the risk of water accumulation and effectively lowering the water level in the mortar layer.

[0036] Furthermore, in this embodiment, a sleeve 44 extends upward from the upper end of the filter cover 4. The sleeve 44 is hollow and communicates with the mounting hole 42. The sleeve 44 is sleeved onto the cylindrical surface of the floor drain pipe 2 and is fixedly connected thereto. This design allows the height of the filter cover to be adjusted according to actual needs to accommodate the required drainage pipes at different heights, ensuring a close fit between the filter cover and the ground, preventing separation between the ground and the filter, and preventing sand and gravel from entering and clogging the secondary drainage system.

[0037] It is important to note that: in this case, the installation hole 42 of the filter cover is provided with an internal thread 45, which cooperates with the external thread 21 of the floor drain pipe and is installed on the floor drain pipe by screw connection. Since the thread structure has a self-locking function, the filter cover can be locked by the thread after being rotated to the appropriate height. Compared with the existing secondary drainer, the present invention effectively solves the problem of easy displacement of the filter cover during installation through the thread locking structure, so that the filter cover can be stably and permanently maintained at the appropriate height, which not only improves the reliability of the device, but also ensures that the drainage efficiency will not decrease due to displacement problems.

[0038] In addition, the drain pipe, floor drain pipe and reducer of the present invention are integrally injection-molded from PVC material, ensuring that the device has good corrosion resistance, aging resistance and durability. The filter cover and sleeve are also made of PVC material, which has high strength and chemical resistance and can be used for a long time in a humid environment. The integral injection molding of PVC material not only makes the drainer more durable, but also significantly improves its production efficiency and cost-effectiveness. Compared with traditional drainers composed of multiple parts, the integrated design of the present invention reduces the number of parts, reduces the failure rate, and simplifies installation and maintenance operations.

[0039] In summary, the invention, with its height-adjustable filter cover, thread-locking function, and optimized filter structure, can flexibly adapt to installation requirements at varying heights and effectively prevent debris from entering the drainage system. Its stable thread-locking mechanism and integrated material design significantly extend the drain's service life and reliability, overcoming common issues with existing technologies such as poor drainage, inconvenient installation, and pipe blockage. This design demonstrates strong practicality and potential for widespread adoption.

[0040] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this utility model.

Claims

1. A height-adjustable secondary drainer, comprising a drain pipe (1) and a floor drain pipe (2), wherein the floor drain pipe (2) has a diameter larger than that of the drain pipe (1), and the two are connected as one through a reducer (3) with a larger diameter at the top and a smaller diameter at the bottom, characterized in that: It also includes a filter cover (4), the lower end of the filter cover (4) is concave upward to form a drainage area (41), a mounting hole (42) is provided at the center thereof, and the filter cover (4) is sleeved on the outer cylindrical surface of the floor drain pipe (2) through the mounting hole (42); A plurality of filter slots (43) are provided on the outer cylindrical surface of the filter cover (4), and the filter slots (43) are connected to the drainage area (41); An external thread (21) is provided on the outer cylindrical surface of the floor drain pipe (2), and an internal thread (45) is provided in the mounting hole (42). The filter cover (4) is screwed onto the external thread (21) of the floor drain pipe (2) via the internal thread (45). The relative height between the filter cover (4) and the floor drain pipe (2) is adjusted by rotating the filter cover (4).

2. The height-adjustable secondary drain according to claim 1, characterized in that: A sleeve (44) is further extended upward from the upper end surface of the filter cover (4); the hollow interior of the sleeve (44) is in communication with the mounting hole (42); and the internal thread (45) is provided on the inner hole of the sleeve (44).

3. The height-adjustable secondary drainer according to claim 1, characterized in that: The drainage pipe (1), floor drain pipe (2) and reducer pipe (3) are integrally injection-molded from PVC material.

4. The height-adjustable secondary drainer according to claim 2, characterized in that: The filter cover (4) and the sleeve (44) are integrally injection-molded from PVC material.

5. The height-adjustable secondary drainer according to claim 1, characterized in that: The filter tank (43) is arranged through the lower end surface of the filter cover (4).

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