A drainer

CN224705229UActive Publication Date: 2026-09-01QUANZHOU KEFA SANITARY WARE
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Patent Information

Application Number
CN202522228948.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-22
Publication Date
2026-09-01
Estimated Expiration
2035-10-22

AI Technical Summary

Technical Problem

[0003]本实用新型的目的在于提供一种下水器,目的是解决下水器排水时,溢流口周边处容易产生虹吸效应对排水速率造成影响,以提高用户使用体验

Benefits of technology

[0021] 1. This utility model proposes a drain device, including a main body with an overflow port connected to a drain channel on its side wall. The drain device also includes a baffle that is movably disposed in the drain channel. The baffle is driven by an end cover, so that the baffle moves with the end cover. When the end cover opens the drain channel, the baffle closes the overflow port, so that the overflow channel and the drain channel are not connected, eliminating air convection between the drain channel and the overflow channel, forming a sealed state, generating a siphon effect, and increasing the drainage speed of the drain channel. It can effectively discharge various dirt such as hair, food scraps, and soap shavings, avoiding pipe blockage and improving the user experience.

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Abstract

A drain assembly includes a main body with a drain channel. An end cap for opening and closing the drain channel is located at the inlet of the drain channel. An overflow port connected to the drain channel is located on the side wall of the main body. The assembly also includes a baffle movably disposed within the drain channel. The baffle has a water passage connected to the drain channel and is kinetically connected to the end cap, allowing it to move with the end cap. When the end cap opens the drain channel, the baffle closes the overflow port, preventing communication between the overflow channel and the drain channel. This eliminates air convection between the drain channel and the overflow channel, creating a sealed environment and generating a siphon effect. This increases the drainage speed of the drain channel, effectively removing hair, food scraps, soap shavings, and other contaminants, preventing pipe blockage and improving the user experience. When the end cap closes the drain channel, the baffle opens the overflow port.
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Description

Technical Field

[0001] This utility model relates to the field of drainage device technology, and in particular to a drainage device. Background Technology

[0002] Common drainage systems typically consist of a main drain body with a through-flow drainage channel and an overflow outlet. In actual use, the overflow channel of the water storage container (such as a washbasin or bathtub) connects to the drainage channel through this overflow outlet. When the water storage container drains, air convection occurs between the overflow outlet and the drainage channel due to this connection. This air convection creates a significant siphon effect around the overflow outlet. This effect not only obstructs normal drainage flow but also significantly slows down the overall drainage speed. During drainage, various debris such as hair, food scraps, and soap shavings can clog the overflow channel due to the siphon effect, causing odors and other hygiene problems. Over time, these issues can severely impact the end-user experience, increase the difficulty of daily cleaning and maintenance, and may even shorten the lifespan of the drainage system. Utility Model Content

[0003] The purpose of this utility model is to provide a drain device that solves the problem of siphon effect around the overflow port affecting the drainage rate when the drain device is draining, thereby improving the user experience.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A drain device includes a drain assembly, which includes a body and a drain channel. The drain channel has an end cap at its inlet for opening and closing the drain channel. The body has an overflow port connected to the drain channel on its side wall. The device also includes a baffle that is movably disposed in the drain channel. The baffle has a flow channel connected to the drain channel. The baffle is drivenly connected to the end cap so that it moves with the end cap.

[0006] When the end cap opens the drain channel, the baffle closes the overflow port;

[0007] When the end cap closes the drain channel, the baffle opens the overflow port.

[0008] Furthermore, a movable shaft is provided inside the drain channel. The first end of the movable shaft is connected to the end cover, and the partition is connected to the middle of the movable shaft. By driving the movable shaft to move up and down, the end cover and the partition move synchronously.

[0009] Furthermore, the baffle includes an outer ring and an inner ring disposed within the outer ring. The outer ring is used to open and close the overflow port. The outer ring and the inner ring are connected to each other by a number of first ribs, and the gap between two first ribs forms a flow channel.

[0010] Furthermore, the inner ring is provided with a stabilizing part extending along its axial direction, which is movably adapted to the outside of the movable shaft.

[0011] Furthermore, a first sludge collection device is provided above the overflow outlet in the sewer channel. The first sludge collection device is connected to the main body, and a movable shaft is movably inserted through the first sludge collection device.

[0012] Furthermore, a second dirt collection component is connected to the end of the movable shaft away from the end cover.

[0013] Furthermore, the first and second sewage collection components are provided with sewage collection tanks, and the sewage collection tanks are provided with several water passage holes connected to the drainage channel.

[0014] Furthermore, it also includes a drive device, which includes a drive shaft assembly to drive a movable shaft, thereby driving the end cover to open and close the drain channel. The drive device is equipped with a reset member, which provides a force to the drive shaft assembly to move it in the direction of closing the drain channel, so that the end cover closes the drain channel under the force generated by the reset member or under the action of gravity.

[0015] Furthermore, the drive unit includes a mounting base, a movable pressing component inside the mounting base, and an adapter component at the outlet of the main body, the adapter component having a water passage connecting the drain channel and the sewage channel; the first end of the drive shaft assembly is located inside the mounting base, and the second end of the drive shaft assembly is located inside the water passage.

[0016] Furthermore, the drive shaft assembly includes a first drive shaft and a second drive shaft connected to each other. One end of the first drive shaft is disposed in the mounting base, and the second drive shaft is disposed in the water passage. The first drive shaft is made of a flexible material, and the second drive shaft is made of a rigid material.

[0017] Furthermore, it also includes a seal, which has a receiving space. The fixed end of the seal is connected to the adapter, and the seal covers the second drive shaft, so that the second drive shaft is isolated from the water passage. The seal has a foldable structure, so that the seal can extend and retract with the movement of the second drive shaft.

[0018] Furthermore, the seal includes a housing with a corrugated surface that forms a folded structure. The interior space of the housing forms an accommodating space, and the housing has an opening communicating with the accommodating space. The second drive shaft is placed in the accommodating space through the opening.

[0019] Furthermore, it also includes a clamping assembly connected to the end of the adapter away from the main body, with a fixing part provided at the edge of the opening. When the clamping assembly is connected to the adapter, it presses the fixing part against the adapter, so that the seal is sealed to the adapter.

[0020] The beneficial effects of this utility model are:

[0021] 1. This utility model proposes a drain device, including a main body with an overflow port connected to a drain channel on its side wall. The drain device also includes a baffle that is movably disposed in the drain channel. The baffle is driven by an end cover, so that the baffle moves with the end cover. When the end cover opens the drain channel, the baffle closes the overflow port, so that the overflow channel and the drain channel are not connected, eliminating air convection between the drain channel and the overflow channel, forming a sealed state, generating a siphon effect, and increasing the drainage speed of the drain channel. It can effectively discharge various dirt such as hair, food scraps, and soap shavings, avoiding pipe blockage and improving the user experience.

[0022] 2. The present invention proposes a drainer, wherein a movable shaft is provided in the drain channel, and a baffle is connected to the middle of the movable shaft, driving the movable shaft to move up and down, so that the end cover and the baffle move synchronously, thereby achieving the linkage effect of the baffle closing the overflow port synchronously when the end cover is opened, and the baffle opening the overflow port synchronously when the end cover is closed.

[0023] 3. The drain device proposed in this utility model has a first dirt collection component located above the overflow port in the drain channel. A movable shaft passes through the first dirt collection component, and a second dirt collection component is located at the end of the movable shaft away from the end cover. Both dirt collection components adopt a mesh structure design, which can effectively intercept solid impurities in sewage and prevent them from entering the drain pipe and causing blockage. At the same time, under the drive of water flow, some impurities are shaken and separated by the movement of the movable shaft, which is convenient for centralized cleaning and improves maintenance convenience.

[0024] 4. The drain device proposed in this utility model also includes a driving device, which includes a drive shaft assembly. The drive shaft assembly can drive the end cover to open and close the drain channel, so that the user does not have to directly contact the sewage, providing the user with a convenient and comfortable operating experience.

[0025] 5. The drain device proposed in this utility model has a reset component in the drive device. The reset component can provide a force to the drive shaft assembly to move it in the direction of closing the drain channel, so that the end cover closes the drain channel under the force generated by the reset component or under the action of gravity. The automatic reset function of the reset component eliminates the need for the user to manually close the drain device, thus improving the convenience of use.

[0026] 6. The drain assembly proposed in this utility model includes a first drive shaft and a second drive shaft connected to each other. The first drive shaft is made of a flexible material and the second drive shaft is made of a rigid material. The first drive shaft made of flexible material can adapt to the bending path of the installation space, which is convenient for assembly and adjustment. The second drive shaft made of rigid material ensures the effective transmission of power. The combination of the two ensures the flexibility of operation and improves the stability and durability of the structure.

[0027] 7. The drainer proposed in this utility model also includes a sealing element. The second drive shaft is located inside the sealing element to isolate it from the water passage, effectively preventing sewage from leaking into the drive device, ensuring the cleanliness and normal operation of the transmission structure, extending the overall service life of the drainer device, and further improving the sealing reliability and safety performance of the product. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a drain device according to the present invention;

[0030] Figure 2 This is a schematic diagram showing the opening of the overflow port of a drain device according to this utility model;

[0031] Figure 3 This is a schematic diagram showing the overflow port of a drain device according to the present invention being closed;

[0032] Figure 4 This is a schematic diagram of a drain device according to the present invention;

[0033] Figure 5 This is a schematic diagram of a drainer drive device according to the present invention;

[0034] Figure 6 This is a schematic diagram of a baffle component in a drain assembly according to the present invention;

[0035] Figure 7 This is a schematic diagram of the first sewage collection component in a drain device according to the present invention;

[0036] Figure 8 This is a schematic diagram of the second sewage collection component in a drain device according to the present invention.

[0037] In the diagram, 10 is the drainage device; 20 is the main body; 201 is the drainage channel; 202 is the limiting step; 203 is the open structure; 204 is the overflow port; 30 is the end cap; 40 is the partition; 401 is the outer ring; 402 is the inner ring; 403 is the first rib; 404 is the second rib; 405 is the flow channel; 50 is the movable shaft; 501 is the limiting protrusion; 601 is the first sludge collection part; 6011 is the limiting flange; 602 is the second sludge collection part; 603 is the sludge collection trough; 701 is the first connecting part; 702 is the second connecting part; 80 is the... 90. Sealing gasket; 90. Drive unit; 901. Mounting base; 9011. Anti-detachment protrusion; 9012. Locking protrusion; 902. Pressing element; 903. Drive shaft assembly; 9031. First drive shaft; 9032. Second drive shaft; 904. Reset element; 905. Connector; 100. Adapter; 1001. Water passage; 110. Seal; 1101. Accommodating space; 1102. Fixing part; 120. Pressing assembly; 1301. First locking element; 1302. Second locking element; 1303. Third locking element. Detailed Implementation

[0038] The following is combined with Figures 1-8 This utility model will be described in detail.

[0039] A drain device includes a drain assembly 10, which comprises a body 20. The body 20 has a drain channel 201, and an end cap 30 for opening and closing the drain channel 201 is provided at the inlet. The side wall of the body 20 has an overflow port 204 connected to the drain channel 201, and the overflow port 204 is connected to the overflow channel of a water tank. The drain assembly also includes a baffle 40 movably disposed in the drain channel 201. The baffle 40 has a flow channel 405 connected to the drain channel 201, so that sewage flows sequentially through the inlet and the flow channel 405 of the drain channel 201 and is finally discharged from the outlet of the drain channel 201. The baffle 40 is kinetically connected to the end cap 30, so that the baffle 40 moves with the end cap 30. Specifically, the baffle 40 is located below the overflow port 204, and two overflow ports 204 are provided opposite to each other on the body 20.

[0040] like Figure 3 As shown, when the sink needs to drain, the upper end cap 30 is moved up to open the drain channel 201, and the baffle 40 is moved up to close the overflow port 204, so that the overflow channel and the drain channel 201 are not connected, eliminating air convection between the drain channel 201 and the overflow channel, forming a sealed state, generating a siphon effect, and increasing the drainage speed of the drain channel 201; at the same time, since the overflow port 204 is closed, various dirt such as hair, food scraps, and soap shavings can be effectively discharged together, avoiding pipe blockage and improving the user experience;

[0041] like Figure 4 As shown, when the water tank needs to store water, the end cap 30 is lowered to close the drain channel 201, and the baffle 40 reopens the overflow port 204, so that the overflow channel of the water tank is connected to the drain channel 201 through the overflow port 204.

[0042] like Figure 4 As shown, the drain channel 201 is provided with a movable shaft 50. The first end of the movable shaft 50 is connected to the end cover 30. The outer side of the movable shaft 50 is provided with a limiting protrusion 501 extending radially outward. Part of the partition member 40 abuts against the protrusion. Thus, by driving the movable shaft 50, the partition member is driven to move up and down, thereby achieving the linkage effect of the partition member 40 closing the overflow port 204 simultaneously when the end cover 30 is opened, and the partition member 40 opening the overflow port 204 simultaneously when the end cover 30 is closed.

[0043] like Figure 6 As shown, the baffle 40 includes an outer ring 401 and an inner ring 402 disposed inside the outer ring 401. The outer ring 401 is used to open and close the overflow port 204. The inner ring 402 and the outer ring 401 are interconnected by a plurality of first ribs 403. The gap between two adjacent first ribs 403 forms a flow channel 405. The movable shaft 50 is movably inserted through the inner ring 402. The inner ring 402 is provided with a stabilizing part extending along its axial direction. The stabilizing part is movably adapted to the outside of the movable shaft 50 to reduce the swaying of the baffle 40 relative to the movable shaft 50 during movement. Furthermore, the stabilizing part is composed of a plurality of mutually spaced second ribs 404.

[0044] like Figure 7 and Figure 8 As shown, a first waste collection element 601 is installed in the drain channel 201 above the overflow outlet 204 to reduce the possibility of waste entering the overflow outlet 204. A limiting step 202 is provided at the upper end of the body 20 above the overflow outlet 204. A limiting flange 6011 is provided on the outer side of the first waste collection element 601, and the limiting protrusion 501 overlaps with the limiting step 202, thus securing the first waste collection element 601. Furthermore, a second waste collection element 602 is connected to the end of the movable shaft 50 away from the end cover 30 to reduce waste discharge into the drain channel. Both waste collection elements adopt a mesh structure design to ensure smooth water flow, reduce water flow resistance, and effectively intercept solid impurities in sewage, preventing them from entering the drain pipe and causing blockages. Simultaneously, under the influence of water flow, some impurities are shaken and separated by the movement of the movable shaft 50, improving maintenance convenience.

[0045] like Figure 7 and Figure 8 As shown, both the first and second waste collection components 601 and 602 are provided with recessed waste collection grooves 603 along the water outlet direction to facilitate the centralized collection of waste. Figure 4As shown, the bottom of the movable shaft 50 is connected to the first connector 701, and the second dirt collector 602 abuts against the first connector 701, so that the movable shaft 50, the first dirt collector 601, the second dirt collector 602, and the partition 40 form a stable whole. When the user needs to clean or replace the first dirt collector 601 and the second dirt collector 602, he only needs to lift the movable shaft 50 to remove the first dirt collector 601 and the second dirt collector 602 from the main body 20, so as to clean and maintain them, which is convenient for the user's daily use.

[0046] like Figure 3 and Figure 4 As shown, the end cap 30 is fitted with a sealing gasket 80. The sealing gasket 80 has a disc-shaped structure. The material between the first and second ends of the sealing gasket 80 is a soft, deformable material, which allows the sealing gasket 80 to better adapt to the movement of the end cap 30 and maintain good sealing performance.

[0047] like Figure 1 , Figure 2 As shown in Figure 5, the drain assembly also includes a drive unit 90, which includes a drive shaft assembly 903. The drive shaft assembly 903 drives the movable shaft 50, thereby driving the end cover 30 to open and close the drain channel 201, preventing users from directly contacting sewage and providing a convenient and comfortable operating experience. The drive unit 90 is equipped with a reset element 904, which is a compression spring. The reset element 904 provides a force to the drive shaft assembly 903 to move it in the direction of closing the drain channel 201, so that the end cover 30 closes the drain channel 201 under the force generated by the reset element 904 or under the weight of the end cover 30 and the movable shaft 50. The automatic reset function of the reset element 904 eliminates the need for users to manually close the drain, improving the convenience of use. Specifically, when the drive assembly is connected to the movable shaft 50, the movable shaft 50, under the force generated by the reset member 904, drives the end cover 30 to move to close the drain channel 201; when the drive assembly is disengaged from the movable shaft 50, the end cover 30 and the movable shaft 50, under their own gravity, drive the end cover 30 to move and close the drain channel 201.

[0048] In this embodiment, the drive device 90 includes a mounting base 901, a movable pressing member 902 is provided in the mounting base 901, and an anti-detachment protrusion 9011 is provided in the mounting base 901. When the pressing member 902 is reset, it can abut against the anti-detachment protrusion to prevent the pressing member 902 from falling out of the mounting base 901. The outlet of the main body 20 is provided with a connector 100, and the connector 100 is provided with a water passage 1001 that connects the drain channel 201 and the sewage channel. The first end of the drive shaft assembly 903 is located in the mounting base 901, and the second end of the drive shaft assembly 903 is located in the water passage 1001. The drive shaft assembly 903 includes a first drive shaft 9031 and a second drive shaft 9032 that are connected to each other. One end of the first drive shaft 9031 is located in the mounting base 901. Furthermore, the first drive shaft 9031 is made of steel wire, which allows it to adapt to the bending path of the installation space, facilitating assembly and adjustment; the second drive shaft 9032 is located in the water passage 1001, and is made of plastic or metal, ensuring effective power transmission. The combination of the two ensures both operational flexibility and structural stability and durability.

[0049] In this embodiment, the mounting base 901 is also provided with a connector 905. The connector 905 is connected to one end of the first drive shaft 9031 located in the mounting base 901. The two ends of the reset member 904 abut against the connector 905 and the mounting base 901 respectively, thereby providing the drive assembly with a force to move it along the direction of closing the drain channel 201.

[0050] In this embodiment, the drain device further includes a seal 110. The seal 110 has a receiving space 1101. The fixed end of the seal 110 is connected to the adapter 100, and the seal 110 covers the second drive shaft 9032, isolating the second drive shaft 9032 from the water passage 1001. The seal 110 has a foldable structure, allowing it to extend and retract with the movement of the second drive shaft 9032, effectively preventing sewage leakage into the drive device 90, ensuring the cleanliness and normal operation of the transmission structure, extending the overall service life of the drain device, and further improving the sealing reliability and safety performance of the product. The seal 110 includes a housing with a corrugated structure on its surface, forming a folding structure. The internal space of the housing forms the receiving space 1101, and the housing has an opening communicating with the receiving space 1101. The second drive shaft 9032 is placed in the receiving space 1101 through the opening. Furthermore, the second drive shaft 9032 is connected to the top of the seal 110, thereby causing the seal 110 to extend and retract when the second movable shaft 50 moves.

[0051] In this embodiment, the drain device also includes a clamping assembly 120 connected to the end of the adapter 100 away from the main body 20. The driving assembly is movably inserted through the clamping assembly 120. A fixing part 1102 is provided at the edge of the opening of the sealing member 110. When the clamping assembly 120 is connected to the adapter 100, the fixing part 1102 is pressed against the adapter 100, so that the sealing member 110 is sealed and connected to the adapter 100.

[0052] In this embodiment, the outer side of the main body 20 is threaded with a first locking member 1301 and a second locking member 1302. The water inlet of the main body 20 has an open structure 203. The open structure 203 and the first locking member 1301 cooperate to fix the main body 20 to the water tank. The second locking member 1302 locks the second connecting member 702 to the bottom of the main body 20. The adapter 100 is connected to the second connecting member 702. The outer side of the mounting base 901 has a third locking member 1303. The third locking member 1303 cooperates with the locking protrusion 9012 provided on the mounting base 901 to clamp the table surface.

[0053] The operating principle of the drain device provided in this embodiment is as follows:

[0054] When the user needs to drain the sink, press the pressing part 902 to compress the reset part 904, causing the drive component to abut against the movable shaft 50 and move it upward, thereby opening the drain channel 201; at the same time, the baffle 40 moves upward with the movable shaft 50 to close the overflow port 204, preventing a siphon effect from occurring around the overflow port 204 during drainage.

[0055] When the user needs to store water in the sink, the press 902 is released, and the drive shaft assembly 903 is reset under the force of the compression spring and moves in the direction of closing the drain channel 201. The drive assembly is disengaged from the movable shaft 50, and the end cover 30 and the movable shaft 50 move downward under their own gravity, closing the drain channel 201 and opening the overflow port 204 at the same time, so that the overflow channel of the sink is connected to the drain channel 201, restoring the overflow function of the sink.

[0056] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A drain device, comprising a drain assembly, the drain assembly including a body, the body having a drain channel, and an end cap for opening and closing the drain channel at the inlet, characterized in that, The main body sidewall is provided with an overflow port communicating with the drain channel, and also includes a baffle member movably provided in the drain channel. The baffle member is provided with a flow channel communicating with the drain channel. The baffle member is throttle connected to the end cover, so that the baffle member moves with the end cover. When the end cap opens the drain channel, the baffle closes the overflow port; When the end cap closes the drain channel, the baffle opens the overflow port.

2. A drain device as described in claim 1, characterized in that, The drain channel is equipped with a movable shaft. The first end of the movable shaft is connected to the end cover, and the partition is connected to the middle of the movable shaft. By driving the movable shaft to move up and down, the end cover and the partition move synchronously.

3. A drain device as described in claim 2, characterized in that, The baffle includes an outer ring and an inner ring disposed within the outer ring. The outer ring is used to open and close the overflow port. The outer ring and the inner ring are interconnected by a plurality of first ribs, and the gap between two first ribs forms the flow channel.

4. A drain device as described in claim 3, characterized in that, The inner ring is provided with a stabilizing portion extending along its axial direction, and the stabilizing portion is movably adapted to the outside of the movable shaft.

5. A drain device as described in claim 2, characterized in that, A first sludge collection component is provided in the drainage channel above the overflow port. The first sludge collection component is connected to the main body, and the movable shaft is movably inserted through the first sludge collection component.

6. A drain device as described in claim 5, characterized in that, The end of the movable shaft away from the end cap is connected to a second dirt collection component.

7. A drain device as described in claim 6, characterized in that, The first and second sludge collection components are provided with sludge collection tanks, and the sludge collection tanks are provided with a plurality of water passage holes that are connected to the drain channel.

8. A drain device as described in claim 2, characterized in that, It also includes a drive device, which includes a drive shaft assembly to drive the movable shaft, thereby driving the end cover to open and close the drain channel. The drive device is provided with a reset member, which is used to provide a force to the drive shaft assembly to move it in the direction of closing the drain channel, so that the end cover closes the drain channel under the force generated by the reset member or under the action of gravity.

9. A drain device as described in claim 8, characterized in that, The drive device includes a mounting base, a movable pressing component inside the mounting base, a connector at the outlet of the main body, and a water passage connecting the drain channel and the sewage channel; the first end of the drive shaft assembly is located inside the mounting base, and the second end of the drive shaft assembly is located inside the water passage.

10. A drain device as described in claim 9, characterized in that, The drive shaft assembly includes a first drive shaft and a second drive shaft connected to each other. One end of the first drive shaft is disposed in the mounting base, and the second drive shaft is disposed in the water passage.

11. A drain device as described in claim 10, characterized in that, It also includes a seal, which has a receiving space. The fixed end of the seal is connected to the adapter and covers the second drive shaft, so that the second drive shaft is isolated from the water passage. The seal has a foldable structure, so that the seal can extend and retract with the movement of the second drive shaft.

12. A drain device as described in claim 11, characterized in that, The sealing element includes a housing with a corrugated structure on its surface, which forms the folded structure. The interior space of the housing forms the receiving space. The housing has an opening communicating with the receiving space, and the second drive shaft is placed in the receiving space through the opening.

13. A drain device as described in claim 12, characterized in that, It also includes a clamping assembly connected to the end of the adapter away from the main body. A fixing part is provided at the edge of the opening. When the clamping assembly is connected to the adapter, it presses the fixing part against the adapter, so that the sealing element is sealed to the adapter.