Closable water seal floor drain device and installation method thereof

Abstract

The invention provides a closable water seal floor drain device and an installation method thereof. The closable water seal floor drain device comprises a body, a supporting piece, a cover plate and an adjusting piece. A containing cavity is defined in the body, and an extending drainage pipe is arranged in the containing cavity. The supporting piece is arranged at the inlet end of the body; the cover plate comprises a top wall and a side wall extending from the periphery of the top wall, and a pipe opening of the drainage pipe extends into the cover plate; the adjusting piece is movably connected with the supporting piece, is in transmission connection with the cover plate and is used for driving the cover plate to move in the axial direction of the drainage pipe; the cover plate can be switched between a closing position and an opening position. When the cover plate is located at the closing position, the inner surface of the cover plate abuts against a pipe opening of the drainage pipe to block the drainage pipe. When the cover plate is located at the opening position, the cover plate is separated from the pipe opening of the drainage pipe, and the side wall of the cover plate and the outer wall of the drainage pipe are kept overlapped in the axial direction, so that water seal fit is formed in the containing cavity. The problems that active closing cannot be achieved, and sealing failure is easily caused by water seal drying or backward flowing are solved.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a shut-off water-sealed floor drain device and its installation method. Background Technology

[0002] During the construction and finishing of aluminum alloy ships, floor drains are typically required for the indoor drainage system. Since the hull structure is mostly made of aluminum alloy, the drain body usually needs to be welded to the hull structure to ensure connection strength and sealing. However, commercially available floor drains are mostly made of steel or stainless steel, and these dissimilar metals are difficult to weld directly. Therefore, the current standard practice is for shipyards to manufacture the aluminum alloy drain body themselves and then purchase commercially available stainless steel water seal cores to install within the hull.

[0003] However, commercially available water seal cores in related technologies typically only have single functions of drainage and water sealing. Their structure is usually fixed, relying on the water within the trap to prevent odors. This structure has the following drawbacks: When a ship sails or anchors for a long time, causing the floor drain to be unused for an extended period, the water inside the drain can easily evaporate and dry out, leading to the failure of the water seal. Odors or insects can then enter the room through the pipes. When encountering wind and waves that cause negative pressure fluctuations in the pipeline or liquid backflow, a simple floor drain structure cannot provide physical barriers, which can easily lead to sewage overflow.

[0004] Therefore, it is necessary to improve the existing water seal floor drain technology to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] To overcome the problems existing in related technologies, the purpose of this invention is to provide a shut-off water seal floor drain device. This shut-off water seal floor drain device overcomes the problems of existing water seal floor drains being unable to close actively and being prone to sealing failure due to water seal drying or backflow by setting an adjustable lifting cover structure.

[0006] A shut-off water-sealed floor drain device, comprising: The body defines a receiving cavity, and an extending drain pipe is provided inside the receiving cavity; A support member is provided at the inlet end of the main body; A cover plate, the cover plate including a top wall and side walls extending from the periphery of the top wall, the opening of the drain pipe extending into the interior of the cover plate; An adjusting component, movably connected to the support component and drivingly connected to the cover plate, is used to drive the cover plate to move axially along the drain pipe; The cover can be switched between a closed position and an open position: When the cover is in the closed position, the inner surface of the cover abuts against the opening of the drain pipe to block the drain pipe; When the cover is in the open position, the cover is separated from the opening of the drain pipe, and the side wall of the cover and the outer wall of the drain pipe are axially overlapped to form a water seal fit in the receiving cavity.

[0007] Furthermore, the support member is provided with an axially penetrating threaded hole; The adjusting element includes a rod with external threads; The rod is screwed into the threaded hole and forms a threaded transmission engagement with the support member. The rotational motion of the adjusting member around its own axis is converted into linear movement of the adjusting member along the axial direction of the drain pipe, causing the cover plate to move closer to or away from the opening of the drain pipe.

[0008] This application employs a threaded drive mechanism, where the support component has a threaded hole and the adjusting component is a rod with external threads, converting rotational motion into linear movement. Utilizing the mechanical principles of threads, a small rotational torque can generate a large axial thrust, allowing the operator to easily overcome the contact resistance of the sealing surface during closure, achieving a tight seal. Simultaneously, the lead characteristics of the threads allow for fine-tuning of the cover's lifting height, facilitating control of drainage flow. The threaded pair has a self-locking characteristic, preventing the cover from automatically sliding or shifting under gravity or water flow impact, ensuring the cover maintains a suspended height when open or a constant sealing pressure when closed, eliminating the need for additional locking devices.

[0009] Furthermore, the adjusting member has an end that extends into the receiving cavity; The cover plate is fixedly connected to the end of the adjusting member, so that the cover plate and the adjusting member are fixed relative to each other in the axial direction, thereby allowing the cover plate to move synchronously with the adjusting member; The cover plate has a cross-sectional dimension larger than the cross-sectional dimension of the drain pipe opening, so as to completely cover and seal the opening in the closed position.

[0010] In this application, the cover plate is fixedly connected to the end of the adjusting component to achieve axial relative fixation, and the cross-sectional dimension of the cover plate is larger than the pipe opening size. Through this fixed connection, the cover plate is forced to move synchronously with the adjusting rod, eliminating the lag of gravity-based reset and preventing malfunctions such as the adjusting rod lifting but the cover plate not lifting (preventing drainage) due to dirt adhesion. The cover plate size being larger than the pipe opening is a geometric prerequisite for forming an effective end-face seal. During the closing operation, the larger cover plate can completely cover the edge of the pipe opening, allowing for a certain degree of coaxiality installation error, ensuring a reliable physical seal in the closed position and preventing leakage.

[0011] Furthermore, the adjusting member has a handle portion at one end opposite to the cover plate, and the handle portion is exposed to the outside of the support member; The handle is constructed as a T-shaped or disc-shaped knob, and the radial dimension of the handle is greater than the radial dimension of the rod.

[0012] This application features a handle portion exposed on the outside of the support member, constructed as a T-shaped or disc-shaped knob, with a large radial dimension. The exposed handle portion allows the operator to operate it by hand without disassembling the grille or finding special tools, greatly improving the convenience of daily use. The large radial dimension of the T-shaped or disc-shaped design increases the lever arm, conforms to ergonomics, and allows the operator to easily apply sufficient rotational torque to tighten the cover plate, ensuring a sealing effect. It also facilitates easy unscrewing even if the threads are slightly corroded or stuck due to long-term disuse.

[0013] Furthermore, the support member is a grid plate, and the grid plate has multiple through fluid channels distributed on it; The fluid channel allows fluid to flow into the receiving cavity while preventing foreign objects larger than the diameter of the fluid channel from entering.

[0014] In this application, the support component itself is constructed as a grid plate with distributed fluid channels. The mounting base of the adjusting component and the filter panel of the floor drain are integrated into one unit, simplifying the overall structure and reducing the number of parts. While ensuring drainage efficiency, the fluid channels effectively intercept large particles such as hair and sediment from entering the receiving cavity and subsequent pipes using the principle of aperture restriction, preventing the cover from failing to close or causing pipe blockage due to foreign objects getting stuck.

[0015] Furthermore, the inner wall of the receiving cavity is provided with a support structure, which is axially located between the inlet end of the body and the outlet of the drain pipe. The edge of the grating plate abuts against the side surface of the support structure facing the inlet end to limit the displacement of the grating plate toward the drain pipe and to provide reaction force support for the operation of the adjusting member.

[0016] This application features a protruding support structure on the inner wall of the receiving cavity, with the edge of the grating plate abutting against the surface of this structure facing the inlet. When the cover plate is pulled down to close and seal by adjusting the adjustment mechanism, the adjustment mechanism applies a downward reaction force to the support member (grating plate). The protruding support structure provides a robust axial restraint for the grating plate, preventing it from collapsing or shifting, and ensuring the effectiveness of the closing action. This structure forms a clearly defined installation step, allowing the grating plate to be naturally positioned simply by being placed inside, reducing assembly difficulty.

[0017] Furthermore, the support structure includes multiple support bars; The multiple support bars are distributed circumferentially along the inner wall of the body to form a multi-point support plane, so that the grid plate is subjected to uniform force and maintains axial perpendicularity with the drain pipe opening.

[0018] This application employs multiple support bars spaced circumferentially to form a multi-point support plane. For self-made aluminum alloy bodies, welding continuous circular rings to the inner wall is extremely difficult to control deformation and involves complex processes. Using multiple short support bars welded at intervals is a simpler process with less thermal deformation, making it ideal for self-made applications. The multi-point distribution (e.g., three or four points) is geometrically sufficient to define a stable support plane, ensuring uniform stress on the grating plate and preventing tilting of the adjusting rod due to uneven load distribution. This ensures the parallelism between the adjusting rod and the drainage pipe axis, guaranteeing a sealing effect.

[0019] Furthermore, the body includes an outer peripheral wall, and the drain pipe is disposed inside the space surrounded by the outer peripheral wall; The outer wall of the drain pipe and the inner wall of the outer peripheral wall define an annular water storage area. When the cover is in the open position, the side wall of the cover extends into the water storage area, and the bottom edge of the side wall is lower than the opening of the drain pipe in the axial direction, thereby forming a liquid seal with the liquid in the water storage area.

[0020] This application defines the fit between the annular water storage area and the sidewall of the cover plate, clarifying that the bottom edge of the sidewall is lower than the pipe opening when in the open position. In the open drainage state, although the cover plate is open, the sidewall inserts into the water storage area, forming a bell-shaped water seal structure. Gas cannot pass through the liquid barrier, thus continuously blocking odors during normal drainage. This structure complements the mechanical shut-off function; daily use relies on the water seal to prevent odors (requiring no frequent operation), while long-term disuse or strong winds and waves rely on the mechanical shut-off to prevent drying out and backflow, completely solving the drawbacks of a single mode.

[0021] Furthermore, the body is made of aluminum alloy. The main body can be directly connected to the structure of an aluminum alloy ship using the same metal welding process.

[0022] This application specifies that the body is made of aluminum alloy and connected using a homogeneous metal welding process. Aluminum alloy vessels cannot directly install steel leaks via welding (welding dissimilar metals is difficult and prone to electrochemical corrosion). The aluminum alloy body of this application is made of the same material as the aluminum alloy hull, with matching melting points and physical properties, enabling a high-quality fusion weld connection. Compared to bolted or adhesive connections, welded connections offer higher strength and sealing reliability, can withstand the severe vibrations and corrosive seawater environment during ship navigation, and eliminate the risk of leakage at the installation interface.

[0023] A second objective of this invention is to provide a method for installing a closable water-sealed floor drain device, for installing the aforementioned closable water-sealed floor drain device onto an aluminum alloy hull structure, comprising the following steps: The body is made of aluminum alloy, and a support structure is welded to the inner wall of the body to construct a mounting position for supporting the support member; The outer wall of the main body is fixedly connected to the aluminum alloy hull structure by welding. The adjusting member is passed through the support member to establish a movable connection, and the cover plate is fixed to the end of the adjusting member to form an assembly; The component is placed into the body, so that the support abuts against the support structure.

[0024] In existing technologies, prefabricated floor drains are typically installed directly, or assembled first and then welded. This application adopts a specific sequence: first welding the support structure, then welding the main body onto the ship, and finally assembling the internal components. Before welding the main body onto the ship, the support strips are welded to the inner wall, providing ample operating space and facilitating welding quality (if the internal support strips were welded after the main body was on the ship, the limited space would make operation difficult). Placing the installation of components such as adjusting parts and cover plates as the final step avoids damage to internal seals or thread deformation caused by the high temperatures during hull welding, and also facilitates subsequent maintenance, cleaning, and disassembly.

[0025] The beneficial effects of this invention are as follows: This invention provides a closable water-sealed floor drain device. This device, through an adjustable element connected to a support element, drives a cover plate to move axially along the drain pipe, enabling flexible switching between a closed and open position. By operating the adjustable element to drive the cover plate to the closed position, the inner surface of the cover plate directly abuts against the drain pipe opening, thus physically sealing the drain pipe. This mechanical seal method does not rely on water and effectively prevents odors or insects from escaping even when the water seal dries up. It also prevents liquid backflow into the room when the pipe is overflowing. When drainage is needed, the cover plate is driven to the open position. At this position, although the cover plate separates from the pipe opening, its sidewall still overlaps the outer wall of the drain pipe axially. This cover structure, in conjunction with the extended drain pipe, allows the liquid within the containment cavity to form an effective water seal, maintaining odor prevention during normal drainage. Attached Figure Description

[0026] Figure 1 This is a cross-sectional schematic diagram of the shut-off water seal floor drain device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the closable water seal floor drain device provided in the embodiments of this application in the open state; Figure 3This is a schematic diagram of the shut-off water seal floor drain device provided in the embodiments of this application in the closed state; Figure 4 This is a schematic diagram of the support member provided in the embodiments of this application; Figure label: 100. Body; 110. Outer peripheral wall; 120. Drain pipe; 130. Receiving cavity; 200. Cover plate; 210. Top wall; 220. Side wall; 300. Supporting structure; 400, Support component; 410, Fluid channel; 420, Threaded hole; 500. Adjusting component; 510. Rod body; 520. Handle part. Detailed Implementation

[0027] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0028] Example 1 like Figures 1 to 4 As shown, this embodiment provides a shut-off water-sealed floor drain device, designed to solve the problem that existing floor drains cannot simultaneously perform drainage and forced sealing functions in specific scenarios. The device includes: The body 100 defines a receiving cavity 130, and an extending drain pipe 120 is provided in the receiving cavity 130; Support member 400, the support member 400 is disposed at the inlet end of the body 100; The cover plate 200 includes a top wall 210 and a side wall 220 extending from the periphery of the top wall 210, and the opening of the drain pipe 120 extends into the interior of the cover plate 200. Adjusting member 500 is movably connected to the support member 400 and is throttle connected to the cover plate 200, for driving the cover plate 200 to move axially along the drain pipe 120; The cover plate 200 can be switched between a closed position and an open position: When the cover plate 200 is in the closed position, the inner surface of the cover plate 200 abuts against the opening of the drain pipe 120 to block the drain pipe 120; When the cover plate 200 is in the open position, the cover plate 200 is separated from the opening of the drain pipe 120, and the side wall 220 of the cover plate 200 and the outer wall of the drain pipe 120 are axially overlapped to form a water seal fit in the receiving cavity 130.

[0029] The device comprises a body 100, which serves as the mounting base and fluid collection structure for the entire device. The body 100 structurally defines an internal receiving cavity 130, designed with sufficient volume to contain fluid. Inside the receiving cavity 130, an extending drain pipe 120 is provided, which is the sole channel for fluid to exit the body 100. The drain pipe 120 is typically vertical or extends upwards, with its opening suspended within the receiving cavity 130 and not in contact with the side wall 220 of the receiving cavity 130, thereby forming an annular space for water retention between the outer wall of the drain pipe 120 and the inner wall of the receiving cavity 130.

[0030] To support and control the internal components of the device, a support member 400 is provided at the inlet end of the main body 100 (i.e., the end where fluid flows in, usually the top). This support member 400 can be a beam structure spanning the opening of the main body 100 or a plate structure covering the opening. Its core function is to provide a stable mounting point and a reaction force base for the adjustment mechanism.

[0031] To achieve both water sealing and locking functions, the device includes a cover plate 200. Geometrically, the cover plate 200 is constructed as a dome structure (similar to an inverted bell jar or cup) with a top wall 210 and side walls 220 extending downwards from the periphery of the top wall 210. In terms of assembly, the opening of the drain pipe 120 within the main body 100 extends into the interior space of the cover plate 200, meaning that the inner diameter of the cover plate 200 is larger than the outer diameter of the drain pipe 120, with a gap between them.

[0032] The key component connecting the support member 400 and the cover plate 200 is the adjusting member 500. The adjusting member 500 acts as a transmission bridge, establishing a movable connection with the top support member 400, meaning that the adjusting member 500 can move relative to the support member 400 (e.g., rotate, slide, etc.); on the other hand, the adjusting member 500 establishes a transmission connection with the lower cover plate 200. The purpose of this connection is to convert external operating forces into movement of the cover plate 200, specifically, to drive the cover plate 200 to reciprocate along the axial (usually vertical) direction of the drain pipe 120.

[0033] Based on the above structure, the device in this embodiment can switch between the following two key operating positions: The first state is the "closed position." This is used to prevent liquid backflow, prevent odor escape due to the water seal drying out from prolonged lack of water, or in scenarios where a complete seal of the pipe is required. In this state, the cover plate 200 is moved towards the drain pipe 120 by operating the adjusting component 500 until the inner surface of the cover plate 200 (usually the inner side of the top wall 210) makes physical contact with and tightly abuts against the end face of the drain pipe 120. At this point, the passage of the drain pipe 120 is physically blocked by the cover plate 200, cutting off the connection between the interior of the body 100 and the external environment, thus achieving a forced seal.

[0034] The second state is the "open position," applied to normal drainage scenarios. In this state, the cover plate 200 is moved away from the drain pipe 120 by operating the adjusting component 500 (i.e., the cover plate 200 is lifted), causing the inner surface of the cover plate 200 to separate from the opening of the drain pipe 120, thereby opening the path for fluid passage. In this position, this embodiment has a key structural feature: although the cover plate 200 is lifted, the side wall 220 of the cover plate 200 is not completely separated from the drain pipe 120. That is, the bottom edge of the side wall 220 of the cover plate 200 is still lower than the height of the opening of the drain pipe 120 in the axial direction, so that the side wall 220 of the cover plate 200 and the outer wall of the drain pipe 120 maintain a certain overlap area in the axial direction. The significance of this overlapping design is that after the fluid flows through and exits the receiving cavity 130, the remaining fluid level in the receiving cavity 130 will be higher than the bottom edge of the side wall 220 of the cover plate 200. This utilizes the barrier effect of the fluid itself to seal off the gas exchange between the internal space of the cover plate 200 and the external environment, forming an effective water seal within the receiving cavity 130, thus preventing odors and insects. In implementing this embodiment, it can be done in the following ways: Regarding the specific shapes of the body 100 and the drain pipe 120, although the common implementation is cylindrical, in practical applications, the outer contour of the body 100 is not limited to a circle. Depending on the requirements of the installation environment (such as a ship's deck, a bathroom corner, or an industrial floor), the cross-section of the body 100 can be designed as a square, rectangle, hexagon, or other polygonal structure, or even a fan-shaped structure to accommodate installation in a specific corner. The drain pipe 120 is located inside the body 100, and its cross-section can also be designed as a circle, ellipse, or a special-shaped pipe with guide ribs, depending on the fluid dynamics requirements. In terms of manufacturing process, the body 100 and the drain pipe 120 can be integrally cast parts, or they can be assembled from separate parts by welding, threaded connections, or flange connections.

[0035] The specific construction of the support member 400 is not limited to a grating plate with multiple drainage holes; it can also be simplified to a cross-shaped, Y-shaped, or straight beam support structure, as long as it can span the opening of the main body 100 and provide a stable central support point for the adjusting member 500. In addition to welding, the support member 400 can be fixed to the main body 100 using screw fastening, snap-fit ​​engagement, bayonet rotation locking (similar to a light bulb installation), or interference fit, facilitating subsequent deep cleaning of the interior.

[0036] For the driving mechanism of the adjusting element 500, in addition to the threaded helical drive implicit in the above embodiments (i.e., the adjusting element 500 is a screw, and the support 400 has a threaded hole), other mechanical structures capable of axial linear movement can also be used. For example, the adjusting element 500 can be a smooth rod, which is frictionally locked by a lateral set screw on the support 400; or a pull rod with a cam locking mechanism, which can be quickly tightened and released by flipping the handle; or even a rod 510 with a rack and pinion structure, which is used in conjunction with a gear knob for lifting and lowering. In the preferred embodiment of the threaded drive, the thread profile can be a common triangular thread, or a trapezoidal thread or a sawtooth thread with stronger load-bearing capacity. The operating end (handle) of the adjusting element 500 exposed to the outside can be designed as a disc-shaped knob (with knurled anti-slip), a T-shaped handle, a butterfly handle, or an internal hexagonal hole or slot designed for anti-theft and anti-accidental operation, requiring special tools to operate.

[0037] Regarding the specific form and connection of the cover plate 200, its overall shape can be a flat-topped cylindrical inverted cup, or a bell-shaped jar with a conical or hemispherical top surface, to facilitate the sliding off of condensate or splashing water. To enhance the sealing effect when closed, the contact area on the inner surface of the cover plate 200 can be a seamlessly machined flat metal surface (hard seal), or a layer of rubber gasket, silicone gasket, or fluororubber sealing ring can be embedded or vulcanized on the inner top surface of the cover plate 200 (soft seal) to improve the tolerance to minute impurities. The connection between the cover plate 200 and the lower end of the adjusting component 500 can be a rigid fixed connection (the cover plate 200 rotates with the screw), or a rotatable connection (for example, the screw head has a ball head or groove, and the cover plate 200 does not rotate with the screw but only moves up and down), the latter reducing friction and wear on the sealing surface.

[0038] Regarding the choice of materials, in addition to aluminum alloy, which is the preferred material for aluminum alloy ships, stainless steel (304 or 316L), brass, cast iron, or even high-strength engineering plastics (such as ABS, nylon, PVC) can also be used for the above-mentioned components in non-welded or civil building scenarios, as long as the structural strength and corrosion resistance requirements are met.

[0039] Example 2 like Figures 1 to 4 As shown, this embodiment provides a shut-off water-sealed floor drain device. This embodiment further elaborates on the basis of embodiment 1, and specifically details and elaborates on the mechanical cooperation form between the adjusting member 500 and the supporting member 400, the connection details between the cover plate 200 and the adjusting member 500, and the handle structure for manual operation.

[0040] In this embodiment, in order to achieve precise control and position holding of the lifting and lowering of the cover plate 200, the "movable connection" between the adjusting member 500 and the supporting member 400 is specifically implemented as a threaded transmission engagement.

[0041] Specifically, the support member 400 located at the top of the main body 100 has an axially penetrating mounting hole at its center. The inner wall of the mounting hole is machined with internal threads, or a nut with internal threads is inserted into the hole. Correspondingly, the adjusting member 500 mainly consists of a rod 510 with external threads. The rod 510 is screwed into the threaded hole 420 of the support member 400, and the rotational motion of the rod 510 around its own axis is converted into linear movement along the axial direction of the drain pipe 120 by utilizing the meshing relationship of the threaded pair.

[0042] This spiral drive method has significant technical advantages: on the one hand, the lead effect of the thread allows a small rotational torque to be converted into a large axial clamping force, ensuring that the cover plate 200 can tightly press the pipe opening in the closed position; on the other hand, the thread structure has self-locking characteristics, which can prevent the cover plate 200 from undergoing unexpected displacement under the impact of water flow or gravity, thereby ensuring the stability of the water seal height.

[0043] Regarding the connection between the adjusting member 500 and the cover plate 200, in this embodiment, the lower end of the adjusting member 500 (i.e., the rod 510) extends into the receiving cavity 130 of the body 100. The cover plate 200 is not simply held in place by the rod 510, but is fixedly connected to the end of the rod 510 by fasteners (such as double nut clamping, welding, or pin connection).

[0044] This "axially fixed" connection method ensures that the cover plate 200 must move synchronously with the rod 510, eliminating the lag of gravity-based reset and preventing the risk of the cover plate 200 remaining stuck in place due to dirt adhesion and failing to drain water when the adjusting component 500 is lifted. Furthermore, to ensure the effectiveness of the physical seal, the cross-sectional dimensions of the cover plate 200 are designed to be strictly larger than the cross-sectional dimensions of the drain pipe 120 opening, so that when closed, the cover plate 200 can completely cover and seal the edge of the drain pipe 120 opening, forming a reliable end-face seal.

[0045] To improve ease of operation, this embodiment features a specially designed structure for the end of the adjusting member 500 exposed outside the support member 400. The top of the adjusting member 500 is provided with a handle portion 520, which is always located above the support member 400 (such as a grille) and can be accessed without disassembling the support member 400.

[0046] In terms of specific shape and construction, the handle portion 520 is designed as a T-shaped structure or a disc-shaped knob structure. Crucially, the radial dimension of the handle portion 520 is significantly larger than the radial dimension of the adjusting member 500's lever body 510. This design not only conforms to ergonomics and facilitates finger grip, but more importantly, by increasing the lever arm, it allows the operator to easily apply sufficient rotational torque to press the cover plate 200, even if the threads show slight corrosion or adhesion due to long-term disuse, the adjusting member 500 can still be easily rotated.

[0047] In addition to the implementation methods mentioned above, this embodiment can also be implemented in the following ways: Regarding the specific construction of the threaded drive fit, besides directly tapping the support 400 to form a threaded hole 420, an embedded nut can also be used. This involves pre-drilling a large hole in the center of the support 400 and pressing in a copper or stainless steel threaded bushing to improve the wear resistance of the threaded pair and prevent stripping of the aluminum alloy body 100. Alternatively, a floating nut structure can be used, where the nut is secured in a groove in the center of the support 400, allowing for slight radial displacement to compensate for coaxiality errors. In addition to the standard triangular thread, trapezoidal, rectangular, or sawtooth threads can be used to handle potential silt in wastewater environments and enhance axial load-bearing capacity. For rapid opening and closing, a multi-start thread design can be used, allowing for a larger lifting stroke with a smaller rotation angle.

[0048] Regarding the connection between the cover plate 200 and the adjusting component 500, in addition to the aforementioned double-nut clamping method, a rotating connection can also be used. Specifically, the end of the adjusting component 500 rod 510 is machined into a ball head or a stud with an annular groove, and the cover plate 200 has a corresponding ball socket or retaining spring groove at its center, allowing the adjusting component 500 to rotate relative to the cover plate 200 while remaining axially locked. This design ensures that when the adjusting component 500 is rotated to tighten, the cover plate 200 only moves vertically up and down without rotating, thus preventing circumferential friction between the sealing gasket on the inner surface of the cover plate 200 and the drain pipe 120 opening, extending the life of the seal. Furthermore, the connection can also be a pin connection, welding, or the adjusting component 500 being directly tapped and screwed into the blind hole stud on the cover plate 200 and spot-welded for fixation.

[0049] Regarding the handle 520, in addition to T-shaped or disc-shaped knobs, to prevent accidental operation or malicious damage in public places, the handle 520 can be designed with an anti-theft interface, such as an internal hexagonal hole, internal triangular hole, or slotted structure, which is flush with the surface of the support 400 when not in use and requires a special key or tool to operate; or it can be designed as a folding pull ring, which rotates when in use and folds down when not in use to reduce its protrusion. To increase aesthetics and prevent slippage, the handle surface can be covered with a rubber layer or processed with knurled texture; the handle can also be designed as a wing nut to facilitate finger application.

[0050] Regarding the sealing fit, although the embodiment describes the cover plate 200 covering the pipe opening, to further improve airtightness, an annular groove can be opened on the inner top surface of the cover plate 200, and an O-ring or flat washer (material can be EPDM, silicone, or nitrile rubber) can be vulcanized or embedded in the groove; or the pipe opening end face of the drain pipe 120 can be designed as a conical surface, and the inner bottom surface of the cover plate 200 can be designed as a matching conical hole, using the conical surface fit to achieve a hard metal seal under high pressure. In addition, a rubber skirt can be added to the bottom edge of the side wall 220 of the cover plate 200 to increase the effective depth of the water seal and reduce the damage to the water seal caused by water flow disturbance when the cover plate is open.

[0051] Example 3 like Figures 1 to 4 As shown, this embodiment provides a shut-off water-sealed floor drain device. This embodiment further elaborates on the above embodiment, and elaborates and deepens the specific structure of the support member 400 and the internal support structure 300 of the body 100 in detail, aiming to solve the technical problem that it is difficult to integrally form a complex installation step in the self-made aluminum alloy floor drain body 100.

[0052] In this embodiment, the support member 400 is a grid plate. This grid plate serves not only as the mounting base for the adjustment mechanism but also as the top cover panel of the floor drain. Multiple through-flow fluid channels 410 are distributed on the surface of the grid plate. The aperture size of these fluid channels 410 is designed to ensure sufficient flow area to meet the needs of rapid drainage while being smaller than the size of common foreign objects (such as hair, fabric fibers, large particles of silt, etc.). Through this structure, the fluid channels 410 allow liquid to flow smoothly into the receiving cavity 130 of the body 100, while blocking larger foreign objects from falling into the receiving cavity 130 and entangled in the adjustment member 500 or clogging the subsequent drain pipe 120.

[0053] To securely install the aforementioned grating plate, this embodiment features a support structure 300 on the inner wall of the receiving cavity 130 of the main body 100. Spatially, this support structure 300 is located between the inlet end at the top of the main body 100 and the opening of the internal drain pipe 120, effectively creating a step on the inner wall. The edge portion of the grating plate directly overlaps and abuts against the surface (i.e., the upper surface) of this support structure 300 facing the inlet end. This fit restricts the displacement of the grating plate towards the drain pipe 120, preventing it from falling deep into the receiving cavity 130, and also provides a support base for the reaction force generated by the adjusting member 500 during operation.

[0054] Given that aluminum alloy marine drain bodies 100 are typically made of rolled and welded pipes or plates with smooth, stepless inner walls, the support structure 300 in this embodiment is not a single-piece cast continuous ring, but rather a composite structure composed of multiple independent support bars. These support bars, as independently manufactured components, are firmly fused to the inner wall of the body 100 through a welding process.

[0055] In terms of distribution, these support strips are spaced apart along the circumference of the inner wall of the body 100 (e.g., three or four evenly distributed segments). This multi-point distribution design has significant technical advantages: multiple supports are sufficient to define a stable support plane in space, ensuring that the grating plate remains horizontal and evenly stressed after installation, thereby ensuring good axial coaxiality between the adjusting member 500 installed in the center of the grating plate and the drainage pipe 120 below; compared to welding a continuous ring, welding multiple short strips at intervals can significantly reduce welding heat input, prevent the body 100 from deforming due to overheating, and also reduce construction difficulty and cost.

[0056] In addition to the implementation methods mentioned above, this embodiment can also be implemented in the following ways: For the support member 400, the shape of its fluid channel 410 can be an array of circular holes, elongated slots, a square mesh, or a radial or patterned perforation designed for aesthetic purposes. The grating is preferably made of the same aluminum alloy as the body 100 to avoid potential corrosion, but stainless steel or high-strength engineering plastics can also be used in non-critical environments. To prevent the grating from falling off when the ship rolls or is subjected to reverse forces, the grating can be fastened to the support bar using countersunk screws, or fixed with a snap-fit ​​structure on the support bar.

[0057] The specific form of the support structure 300 can be a short-sectioned angle aluminum (L-shaped profile), with one side welded to the inner wall and the other side serving as a support step; it can also be a solid square or flat aluminum strip. The number of support strips is not limited to three or four. For small-diameter floor drains, it can be two symmetrical semicircular rings; for large-diameter floor drains, it can be six or more short strips. The welding process can be full welding to ensure strength, or intermittent welding to reduce deformation. In extreme cases, if the wall thickness of the body 100mm allows, the support structure 300 can also be an inner step machined or a support pin fixed by strong riveting.

[0058] Example 4 like Figures 1 to 4 As shown, this embodiment provides a shut-off water-sealed floor drain device. This embodiment further elaborates on the above embodiments, focusing on the specific implementation of the material selection and water seal structure, and provides a detailed explanation of the application scenarios of aluminum alloy ships and the construction principle of the fluid seal.

[0059] Given the specific characteristics of shipbuilding, the material of the device body 100 in this embodiment is specifically selected as aluminum alloy. This material selection is not arbitrary, but rather to address the electrochemical corrosion issues associated with joining dissimilar metals and the compatibility of welding processes. In practical implementation, marine-grade aluminum alloys such as 5083 aluminum-magnesium alloy or 6061 aluminum-magnesium-silicon alloy, which exhibit excellent seawater corrosion resistance, can be selected.

[0060] Since the material of the main body 100 is the same as or similar to that of the deck or cabin structure of the aluminum alloy hull, the outer peripheral wall 110 of the main body 100 can be directly fused to the hull structure using the same metal welding process (such as MIG inert gas shielded welding) during installation. This connection method eliminates the potential for loosening and leakage that may occur with flange or threaded connections, ensuring the integrated strength of the drain device and the hull structure, and enabling it to withstand the severe turbulence and vibration of the ship during sea voyages.

[0061] In the internal structure of the main body 100, this embodiment details the formation of the "water storage area". The main body 100 is composed of an outer peripheral wall 110 and an internally vertically arranged drain pipe 120. The drain pipe 120 is located at the center of the space surrounded by the outer peripheral wall 110, with its lower end connected to the bottom of the main body 100 and leading to the hull drain pipe 120, while its upper end is suspended inside the main body 100. Between the outer wall surface of the drain pipe 120 and the inner wall surface of the outer peripheral wall 110 of the main body 100, an annular groove space is naturally defined, which is the "water storage area" or "accommodation cavity 130". The function of this water storage area is to store a portion of fluid for a long period of time, serving as a medium to block gas.

[0062] To achieve the function of "odor prevention even when open", this embodiment strictly limits the dimensional fit between the cover plate 200 and the drain pipe 120. The cover plate 200 is designed as an inverted cup-shaped or bell-shaped structure with a certain depth, and its side wall 220 has sufficient axial length. When the cover plate 200 is driven upward to enter the "open position" for drainage by the adjusting member 500, although the cover plate 200 is separated from the opening of the drain pipe 120 to make way for the water flow channel, the upward movement of the cover plate 200 is designed to be limited, or the length of the side wall 220 of the cover plate 200 is designed to be long enough to ensure that, in the normal open drainage state, the bottom edge of the side wall 220 of the cover plate 200 is always lower than the position of the opening of the drain pipe 120 in axial height.

[0063] This positional relationship means that regardless of whether the cover 200 is closed or open, a portion of the side wall 220 of the cover 200 always extends into the aforementioned annular water storage area. When the water storage area is filled with liquid (such as residual wash water), the side wall 220 of the cover 200 extending below the liquid surface effectively acts as a partition wall. For outside air or odors to enter the room through the floor drain, they must first submerge themselves in water, bypass the bottom edge of the side wall 220 of the cover 200, and then ascend through the drain pipe 120, which is physically impossible. Therefore, through this axial "overlap" fit between the bottom edge of the side wall 220 and the opening of the drain pipe 120, the device forms a reliable liquid seal barrier within the receiving cavity 130, ensuring that the floor drain can continuously and effectively prevent sewer odors from overflowing while it is draining.

[0064] In addition to the implementation methods mentioned above, this embodiment can also be implemented in the following ways: While this embodiment focuses on aluminum alloy vessels, the material of the body 100 can be adjusted according to actual needs in other non-marine applications or scenarios with different fire resistance requirements. For example, in the ground drainage systems of chemical ships or food processing plants, 316L stainless steel can be used for the body 100 to resist strong acid and alkali corrosion; in the bathroom systems of civil buildings or yachts, high-strength engineering plastics (such as ABS, UPVC, or PPR) can be injection molded to reduce costs and weight; in the retro-style high-end cruise ship decoration, brass or bronze can also be used for the body 100 to match the overall decorative style. Correspondingly, if the material is changed, the connection method between the body 100 and the installation foundation is not limited to welding, and can be achieved by flange bolt connection (suitable for steel decks), pipe thread connection (suitable for embedded pipes), clamp connection (suitable for grooved pipes), or chemical solvent bonding (suitable for plastic pipes).

[0065] Regarding the structural form of the water storage area and the drain pipe 120, although the embodiment describes them as a coaxial annular space, in space-constrained installation environments, an eccentric structure can be adopted. That is, the axis of the drain pipe 120 does not coincide with the geometric center of the outer shell of the main body 100, thereby making one side of the annular water storage area wider and the other side narrower to meet the needs of wall-mounted installation. The cross-sectional shape of the drain pipe 120 is not limited to a circle; it can be designed as a rounded rectangle or an ellipse to increase the cross-sectional area for water passage. In addition, the end face of the drain pipe 120 can not be perpendicular to the axis, but can be designed as a beveled cut or a wavy port. This way, even if the cover plate 200 accidentally falls and comes into contact with the pipe opening, the height difference of the beveled cut can ensure that a small gap is left for a small amount of water to drain out, preventing complete blockage.

[0066] To optimize hydrodynamic performance, the sidewall 220 of the cover plate 200 can be designed as a truncated cone shape, narrower at the top and wider at the bottom, to facilitate the sliding of impurities and prevent dirt buildup. Alternatively, the bottom edge of the sidewall 220 can be designed as serrated or wavy to disrupt the water film tension during initial opening, facilitating smoother drainage. To prevent water from being drawn away from the storage area under negative pressure (siphoning), the top wall 210 of the cover plate 200 can have an anti-siphon hole (requiring a one-way valve). Alternatively, the volume of the sidewall 220 of the cover plate 200 can be designed to be proportionally larger than the volume of the drain pipe 120 to ensure that even in the event of a momentary siphon, the remaining water in the storage area is sufficient to maintain the minimum effective water seal height (e.g., a 50mm water seal). Furthermore, the inner and outer surfaces of the sidewall 220 of the cover plate 200 can be coated with a Teflon (PTFE) coating or a nano-hydrophobic coating to reduce dirt adhesion and maintain the cleanliness of the water seal structure over the long term.

[0067] Example 5 like Figures 1 to 4 As shown, this embodiment provides a specific shut-off water-sealed floor drain device and its entire installation method based on an aluminum alloy shipbuilding scenario.

[0068] The drain device in this embodiment includes the following specific structural components: DIY aluminum alloy body 100 components: The outer shell of the main body 100 is made of 5083 or 6061 marine aluminum alloy tubing, which is cut and processed to form a cylindrical outer peripheral wall 110.

[0069] The central drain pipe 120 is also made of aluminum alloy. Its diameter is smaller than that of the outer shell. It is vertically welded to the bottom center of the outer shell, and its top opening is suspended inside the outer shell.

[0070] The welded support strip consists of four L-shaped angle or rectangular aluminum strips. These four strips are evenly spaced at 90-degree intervals along the circumference, approximately 15mm-25mm below the top of the inner wall of the main body 100 (the exact distance depends on the grid thickness), and are firmly welded to the inner wall of the main body 100 using aluminum inert gas welding. The upper surfaces of these four support strips are on the same horizontal plane, together forming a discontinuous but stable annular mounting platform.

[0071] The support member 400 is a circular plate made of stainless steel or aluminum alloy sheet, with a diameter slightly smaller than the inner diameter of the main body 100 for easy insertion. Several elongated or fan-shaped fluid channels 410 (drainage holes) are formed on the plate surface by laser cutting or stamping, forming a grid plate. The geometric center of the grid plate is tapped with an M10 or M12 through-threaded hole 420.

[0072] The adjusting component 500 uses a threaded rod made of 316L stainless steel, with full or partial threads on its body to match the internal threaded hole 420 in the center of the grating plate. A T-shaped crossbar is welded to the top of the screw as a handle, or it is equipped with a knurled disc knob with a diameter larger than that of the screw, so as to facilitate finger pinching and rotation.

[0073] The bell-shaped cover 200 has an inverted cup-like structure and is made of stainless steel or corrosion-resistant engineering plastic. The inner diameter of the cover 200 is larger than the outer diameter of the central drain pipe 120 (e.g., a 5mm-10mm gap on one side). A mounting hole is located at the center of the top of the cover 200.

[0074] The fasteners include two stainless steel lock nuts (nylon lock nuts), one on top and one on the bottom.

[0075] The installation method in this embodiment fully considers the special characteristics of hull construction and proceeds in the logical sequence of internal component prefabrication, body 100 welding, and component assembly: Step 1: Prefabrication of the internal support structure 300 of the main body 100 Before the drain is installed on the ship, workers process the aluminum alloy body 100 on the workshop workbench.

[0076] The specific procedure is as follows: Measure the predetermined depth (e.g., 20mm) below the upper surface of the body 100 and mark the positioning line. Attach the aforementioned four aluminum alloy support strips to the positioning line on the inner wall of the body 100 in a symmetrical cross-shaped arrangement. Use an argon arc welding gun for spot welding positioning, followed by full welding reinforcement.

[0077] At this point, the main body 100 is not yet fixed in the narrow dead corner of the hull, and the workers can freely rotate the main body 100 to ensure the quality of internal welding and create a flat grid installation position.

[0078] Step 2: Connection between the main body 100 and the hull structure The prefabricated aluminum alloy body 100 with support bars is transported to the installation point inside the ship's cabin. The body 100 is then embedded into the pre-drilled opening in the aluminum alloy deck or the ground.

[0079] The specific operation is as follows: using the same metal welding process (usually MIG welding or TIG welding), continuous circumferential welding is performed along the joint between the outer peripheral wall 110 of the body 100 and the deck.

[0080] By utilizing the homogeneous welding characteristics of aluminum alloy, the drain body 100 is integrated with the hull, achieving the watertight strength required by the classification society, and eliminating the risk of electrochemical corrosion.

[0081] Step 3: Pre-assembly of core components The welding is carried out while waiting for the welds to cool on the ship or in a clean assembly area.

[0082] The specific operation is as follows: Screw the adjusting screw into the central threaded hole 420 of the grating plate, leaving an appropriate lower end length. Next, put the bell-shaped cover plate 200 onto the lower end of the extended adjusting screw. Screw in the anti-loosening nuts on the upper and lower sides of the cover plate 200 respectively, "clamping" the cover plate 200 to the end of the screw.

[0083] The handle, grille, and cover plate 200 are integrated into a single independent component, avoiding the need to assemble tiny parts (nuts) in the confined space inside the main body 100 and preventing parts from falling into the drain pipe 120.

[0084] Step 4: Final Assembly and Debugging After the main body is welded to 100 and the welding slag is cleaned.

[0085] The specific operation is as follows: Hold the handle of the adjusting screw, lift the entire core component, and vertically place it into the body 100. Adjust the angle so that the edge of the grille plate accurately falls on the four support bars welded in step one.

[0086] At this point, perform functional debugging: Closure test: Rotate the T-shaped handle clockwise. The threaded drive screw descends, causing the cover plate 200 to press down. Continue until the handle feels tight, indicating that the inner top surface of the cover plate 200 has been pressed firmly against the opening of the central drain pipe 120, achieving a physical seal.

[0087] Opening / Water Seal Test: Rotate the T-shaped handle counterclockwise several times (e.g., 3-5 times) and observe the cover plate 200 rise. After stopping the rotation, observe through the grille gap to confirm that the bottom edge of the side wall 220 of the cover plate 200 is still lower than the height of the drain pipe 120 opening (i.e., maintaining axial overlap), ensuring the formation of the water seal structure.

[0088] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0089] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A closable water-sealed floor drain device, characterized in that, include: The body (100) defines a receiving cavity (130) and an extending drain pipe (120) is provided in the receiving cavity (130); A support member (400) is provided at the inlet end of the body (100); A cover plate (200) including a top wall (210) and a side wall (220) extending from the periphery of the top wall (210), the opening of the drain pipe (120) extending into the interior of the cover plate (200); An adjusting member (500) is movably connected to the support member (400) and is drively connected to the cover plate (200) for driving the cover plate (200) to move axially along the drain pipe (120); The cover plate (200) can be switched between a closed position and an open position: When the cover plate (200) is in the closed position, the inner surface of the cover plate (200) abuts against the opening of the drain pipe (120) to block the drain pipe (120); When the cover plate (200) is in the open position, the cover plate (200) is separated from the opening of the drain pipe (120), and the side wall (220) of the cover plate (200) and the outer wall of the drain pipe (120) are axially overlapped to form a water seal fit in the receiving cavity (130).

2. The shut-off water-sealed floor drain device according to claim 1, characterized in that: The support member (400) is provided with an axially penetrating threaded hole (420); The adjusting member (500) includes a rod (510) with external threads; The rod (510) is screwed into the threaded hole (420) and forms a threaded transmission engagement with the support (400). The rotational motion of the adjusting member (500) around its own axis is converted into a linear movement of the adjusting member (500) along the axial direction of the drain pipe (120), which drives the cover plate (200) to move closer to or away from the opening of the drain pipe (120).

3. The shut-off water-sealed floor drain device according to claim 2, characterized in that: The adjusting member (500) has an end that extends into the receiving cavity (130); The cover plate (200) is fixedly connected to the end of the adjusting member (500), so that the cover plate (200) and the adjusting member (500) are fixed relative to each other in the axial direction, thereby making the cover plate (200) move synchronously with the adjusting member (500); The cross-sectional dimension of the cover plate (200) is larger than the cross-sectional dimension of the drain pipe (120) opening, so as to completely cover and seal the opening in the closed position.

4. The shut-off water-sealed floor drain device according to claim 2, characterized in that: The adjusting member (500) has a handle portion (520) at one end opposite to the cover plate (200), and the handle portion (520) is exposed to the outside of the support member (400); The handle (520) is constructed as a T-shaped or disc-shaped knob, and the radial dimension of the handle (520) is greater than the radial dimension of the rod (510).

5. The shut-off water-sealed floor drain device according to claim 1, characterized in that: The support member (400) is a grid plate, and multiple through fluid channels (410) are distributed on the grid plate; The fluid channel (410) allows fluid to flow into the receiving cavity (130) while blocking foreign objects larger than the aperture of the fluid channel (410) from entering.

6. The shut-off water-sealed floor drain device according to claim 5, characterized in that: The inner wall of the receiving cavity (130) is provided with a support structure (300), which is axially located between the inlet end of the body (100) and the opening of the drain pipe (120). The edge of the grating plate abuts against the side surface of the support structure (300) facing the inlet end to limit the displacement of the grating plate toward the drain pipe (120) and provide reaction force support for the operation of the adjusting member (500).

7. The shut-off water-sealed floor drain device according to claim 6, characterized in that: The support structure (300) includes multiple support bars; The multiple support bars are distributed circumferentially along the inner wall of the body (100) to form a multi-point support plane, so that the grid plate is subjected to uniform force and maintains axial perpendicularity with the opening of the drain pipe (120).

8. The shut-off water-sealed floor drain device according to claim 1, characterized in that: The body (100) includes an outer peripheral wall (110), and the drain pipe (120) is disposed inside the space surrounded by the outer peripheral wall (110); The outer wall of the drain pipe (120) and the inner wall of the outer peripheral wall (110) define an annular water storage area; When the cover plate (200) is in the open position, the side wall (220) of the cover plate (200) extends into the water storage area, and the bottom edge of the side wall (220) is lower than the opening of the drain pipe (120) in the axial direction, thereby forming a liquid seal with the liquid in the water storage area.

9. The shut-off water-sealed floor drain device according to claim 1, characterized in that: The body (100) is made of aluminum alloy material; The body (100) can be directly connected to the structure of the aluminum alloy ship through the same metal welding process.

10. A method for installing a closable water-sealed floor drain device, characterized in that, The method for installing a shut-off water-sealed floor drain device as described in any one of claims 1 to 9 onto an aluminum alloy hull structure includes the following steps: The body (100) is made of aluminum alloy, and a support structure (300) is welded to the inner wall of the body (100) to construct a mounting position for supporting the support member (400); The outer wall of the main body (100) is fixedly connected to the aluminum alloy hull structure by welding process; The adjusting member (500) is passed through the support member (400) and a movable connection is established, and the cover plate (200) is fixed to the end of the adjusting member (500) to form an assembly; The component is placed inside the body (100) so that the support (400) abuts against the support structure (300).

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