Improved floor drain and method of replacing

Abstract

The application discloses an improved floor drain and a replacement method, which comprises a floor drain inner core and an inner filter screen, wherein the floor drain inner core and the inner filter screen are arranged separately from a floor drain shell and can be placed in the floor drain shell; compared with the prior art, the floor drain inner core and the inner filter screen arranged separately from the floor drain shell can be matched with the existing old floor drain shell, so that the replacement and upgrading are realized.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware, specifically to an improved floor drain and its replacement method. Background Technology

[0002] A floor drain is a drainage device that connects the floor to the drainage pipe system. Old-style floor drains only have a drain outlet on the outer casing, and odor prevention is achieved through an odor trap at the bottom of an external filter screen. However, the old-style floor drain casing is installed on the floor, and replacing it with a complete set of new floor drains requires removing the old casing, which is a difficult project. Therefore, there is an urgent need to develop replacement products suitable for old-style floor drain casings.

[0003] In view of this, the inventor conducted in-depth research on the aforementioned deficiencies in the prior art, which led to the creation of this case. Summary of the Invention

[0004] The main objective of this invention is to provide an improved floor drain and a replacement method, and to provide a new floor drain structure that is suitable for replacing and renovating old floor drains.

[0005] To achieve the above objectives, the solution of the present invention is:

[0006] An improved floor drain includes a drain core and an inner filter screen, wherein the drain core and the inner filter screen are separately disposed from the drain housing and can be placed inside the drain housing.

[0007] Furthermore, there is a transverse drainage gap between the lower surface of the inner filter screen and the upper end surface of the drain core; the outer peripheral edge of the inner filter screen is connected to an annular rubber ring for abutting against and sealing the bottom wall or inner wall of the drain shell.

[0008] Furthermore, a limiting structure for supporting the inner filter screen to form a transverse drainage gap is provided between the inner filter screen and the drain core, and the limiting structure is formed on the inner filter screen and / or the drain core; before the annular rubber ring is connected to the drain shell, the outer peripheral edge of the annular rubber ring is lower than the outer peripheral edge of the filter screen body.

[0009] Furthermore, the inner filter screen includes a filter screen body with filter holes and an annular folded edge located on the outer periphery of the filter screen body, and the annular rubber ring is connected to the annular folded edge; the inner side of the annular folded edge is higher than the connection point between the annular folded edge and the annular rubber ring.

[0010] Furthermore, the limiting structure includes a plurality of first limiting protrusions formed on the upper end face of the inner core of the drain, and the lower surface of the inner filter screen overlaps on the first limiting protrusions; or, the limiting structure includes a plurality of second limiting protrusions formed on the lower surface of the inner filter screen, and the second limiting protrusions abut against the upper end face of the inner core of the drain.

[0011] Furthermore, a central rod is formed in the middle of the inner filter screen, a central seat is formed inside the inner core of the drain core, the central seat has a insertion hole in the center, the central seat is connected to the inner wall of the drain core through a water-passing rib, and the central rod is inserted into the insertion hole.

[0012] Furthermore, the limiting structure includes a third limiting protrusion formed on the side of the central rod, which can be attached to the central seat from top to bottom.

[0013] Furthermore, the filter body has a concave filter section, the outer periphery of which is connected to the annular folded edge, and the connection point between the concave filter section and the annular folded edge is the highest point of the concave filter section and the annular folded edge; the center of the inner filter has an upward convex filter section.

[0014] Furthermore, the inner filter screen has a handle at its center.

[0015] A method for replacing a floor drain, using the aforementioned improved floor drain, further includes the following steps:

[0016] ① Remove the old inner core inside the existing floor drain shell that is embedded in the ground and clean the inner cavity of the floor drain shell;

[0017] ② Insert the drain core into the inner cavity of the drain shell;

[0018] ③ Insert the inner filter screen into the drain housing, and form a transverse drainage gap between the lower surface of the inner filter screen and the upper end face of the drain core; the annular rubber ring on the outer periphery of the inner filter screen makes sealing contact with the bottom wall or inner wall of the drain housing.

[0019] With the above structure, the improved floor drain of the present invention has at least the following beneficial effects:

[0020] 1. A transverse drainage gap exists between the inner filter screen and the upper surface of the drain core. This allows water entering the drain to flow smoothly downwards through the filter holes of the outer ring of the inner filter screen, horizontally across the upper surface of the drain core, and then out through the inner cavity of the drain core. When discharging a large flow of water, both the inner and outer rings of the inner filter screen can drain water. The transverse drainage gap ensures that the outer ring of the inner filter screen can fully perform its drainage function, thus maximizing the water-passing area of ​​the inner filter screen.

[0021] Second, the annular rubber ring seals the outer edge of the inner filter screen to the drain casing, preventing sewage from bypassing the outer periphery of the inner filter screen and directly entering below it. This ensures that water flow passes through the filter holes on the inner filter screen.

[0022] Third, the limiting structure acts directly between the inner filter screen and the drain core, and is less affected by the shape of the drain shell. Therefore, the drain core and inner filter screen of this invention can be adapted to most existing drain shells on the market, enabling the replacement and upgrading of old drains while retaining the original drain shell. The limiting structure ensures that even when the inner filter screen and the drain core are pressed together, there is still at least a designed width for a lateral drainage gap, such as 1.5mm, guaranteeing effective water flow.

[0023] Fourth, the central rod engages with the insertion hole on the central seat to achieve lateral positioning of the inner filter screen.

[0024] 5. The limiting structure can be formed between the inner filter screen and the upper surface of the drain core, such as through a first limiting protrusion and / or a second limiting protrusion. Alternatively, a third limiting protrusion can be provided on the central rod. After the central rod is inserted to the lowest position in the insertion hole, the third limiting protrusion abuts against the central seat, thereby forming a transverse drainage gap between the lower surface of the inner filter screen and the upper surface of the drain core.

[0025] 6. The convex filter section on the inner filter screen allows dirt to be intercepted on the upper surface of the outer ring of the inner filter screen when it enters. Even if the upper surface of the outer ring of the inner filter screen is filled with dirt, it can be drained away through the convex filter section after the water level rises, reducing the risk of the inner filter screen becoming completely clogged.

[0026] Compared with existing technologies, this invention, by setting up a drain core and an inner filter screen that are separate from the drain shell, allows the drain core and inner filter screen to adapt and fit with existing old drain shells, achieving a replacement and upgrade. The transverse drainage gap located between the lower surface of the inner filter screen and the upper surface of the drain core, along with the annular rubber ring, prevents water from bypassing the filter holes and flowing directly from the edge of the inner filter screen to its lower surface. This ensures smooth drainage through the filter holes on the outer ring of the inner filter screen while maintaining filtration effectiveness. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the floor drain.

[0028] Figure 2 This is a three-dimensional structural diagram of the first embodiment of the present invention.

[0029] Figure 3 This is a cross-sectional structural diagram of the first embodiment of the present invention.

[0030] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0031] Figure 5This is a cross-sectional view of the internal filter screen during installation in the first embodiment.

[0032] Figure 6 for Figure 5 A magnified structural diagram at point B in the middle.

[0033] Figure 7 This is a cross-sectional exploded view of the first embodiment of the present invention.

[0034] Figure 8 This is a three-dimensional exploded structural diagram of the first embodiment of the present invention.

[0035] Figure 9 This is a three-dimensional exploded structural diagram of the first embodiment of the present invention from another angle.

[0036] Figure 10 This is a three-dimensional structural diagram of the second embodiment of the present invention.

[0037] Figure 11 This is a cross-sectional structural diagram of the second embodiment of the present invention.

[0038] Figure 12 This is a three-dimensional structural diagram of the third embodiment of the present invention.

[0039] Figure 13 This is a cross-sectional structural diagram of the third embodiment of the present invention.

[0040] Figure 14 This is a cross-sectional structural diagram of the fourth embodiment of the present invention.

[0041] Figure 15 This is a three-dimensional structural diagram of the inner filter screen according to the fourth embodiment of the present invention.

[0042] Figure 16 This is a cross-sectional structural diagram of the fifth embodiment of the present invention.

[0043] Figure 17 This is a three-dimensional structural diagram of the inner filter screen according to the fifth embodiment of the present invention.

[0044] Figure 18 This is a cross-sectional view of the internal filter screen during installation in the fifth embodiment.

[0045] In the picture:

[0046] Drain inner core 1; upper end face 10; first limiting protrusion 11; center seat 12; insertion hole 121; water passage rib 122; inner filter screen 2; filter screen body 201; concave filter part 2011; convex filter part 2012; annular folded edge 202; inner ring 203; outer ring 204; center rod 21; third limiting protrusion 211; recess 221; protruding post 222; annular rubber ring 23; lifting button 24; second limiting protrusion 25; transverse drainage gap 3; magnetic anti-odor flip cover 4; drain outer shell 100; outer filter screen 110; drain hole 120. Detailed Implementation

[0047] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0048] like Figure 1 As shown, a drain core 1 is provided inside the drain housing 100, and an inner filter screen 2 is provided on the drain core 1. The part of the inner filter screen 2 corresponding to the drain hole 120 of the drain core 1 is the inner ring 203 of the inner filter screen 2, and the inner filter screen 2 outside the inner ring is the outer ring 204 of the inner filter.

[0049] However, when the inner filter screen 2 is placed on the inner core 1 of the drain, it directly adheres to the upper surface 10 of the inner core 1, rendering the filter holes on the outer ring of the inner filter screen 2 ineffective. As a result, debris accumulates in the middle of the inner filter screen 2 with the water flow. With the accumulation of debris, the water flow capacity decreases, affecting the drainage effect. The inner filter screen 2 may also shift laterally and not be centered, thus affecting its filtering and water flow functions; moreover, sewage can easily bypass the outer periphery of the inner filter screen 2 and enter directly below it without passing through the filter holes.

[0050] like Figures 2 to 9 As shown, this is an improved floor drain according to the present invention. As a preferred first embodiment of the present invention, it includes a floor drain core 1 and an inner filter screen 2. The lower surface of the inner filter screen 2 and the upper end surface of the floor drain core 1 have a transverse drainage gap 3. The outer peripheral edge of the inner filter screen 2 is connected to an annular rubber ring 23 for abutting and sealing against the bottom wall or inner wall of the floor drain housing 100.

[0051] The inner filter screen 2 and the drain inner core 1 have a limiting structure for supporting the inner filter screen 2 to form a transverse drainage gap 3. This limiting structure is formed on the inner filter screen 2 and / or the drain inner core 1. The limiting structure supports the inner filter screen 2, creating a transverse drainage gap 3 between the inner filter screen 2 and the upper surface of the drain inner core 1. Water entering the drain can flow smoothly downwards through the filter holes of the outer ring of the inner filter screen 2, horizontally across the upper surface of the drain inner core 1, and then flow out through the inner cavity of the drain inner core 1. When draining a large flow of water, both the inner and outer rings of the inner filter screen 2 can drain water. The transverse drainage gap 3 ensures that the outer ring of the inner filter screen 2 can fully perform its drainage function, thus maximizing the water-passing area of ​​the inner filter screen 2.

[0052] Before the annular rubber ring 23 is connected to the drain housing 100, in its natural state, the outer periphery of the annular rubber ring 23 is lower than the outer periphery of the filter screen body 201. Thus, after the inner filter screen 2 is installed, the annular rubber ring 23 prevents water from bypassing the outer edge of the inner filter screen 2 and directly entering below it. This ensures the filtration effect. The annular rubber ring 23 can connect to the bottom wall of the drain housing 100, or it can be bent upwards and deformed to abut and seal against the inner wall of the drain housing 100. Because the annular rubber ring 23 is tilted outwards and downwards in its natural state, its bending angle is large, resulting in a good sealing effect.

[0053] Preferably, the inner filter 2 includes a filter body 201 with filter holes and an annular folded edge 202 located on the outer periphery of the filter body 201, and the annular rubber ring 23 is connected to the annular folded edge 202; the inner side of the annular folded edge 202 is higher than the connection point between the annular folded edge 202 and the annular rubber ring 23. Preferably, the filter body 201 has a concave filter portion 2011, the outer periphery of the concave filter portion 2011 is connected to the annular folded edge 202, and the connection point between the concave filter portion 2011 and the annular folded edge 202 is the highest point of the concave filter portion 2011 and the annular folded edge 202; the inner filter 2 has an upwardly convex filter portion 2012 at its center.

[0054] The annular folded edge 202 is integrally connected to the annular rubber ring 23. The filter body 201 is made of plastic, and the annular rubber ring is directly formed on the filter body 201 during the molding process. The annular folded edge 202 is provided with a protrusion, which is embedded in the annular rubber ring 23, so that the annular folded edge 202 and the annular rubber ring 23 are firmly connected.

[0055] The concave filter section 2011 collects debris, and even if debris accumulates in the concave filter section 2011, the accumulated water can be drained away through the filter holes of the convex filter section 2012.

[0056] The limiting structure acts directly between the inner filter screen 2 and the drain inner core 1, and is less affected by the shape of the drain outer shell 100. Thus, the drain inner core 1 and inner filter screen 2 of this invention can be adapted to most existing drain outer shells 100 on the market, enabling the replacement and upgrading of old drains while retaining the drain outer shell 100. The limiting structure ensures that even when the inner filter screen 2 and the drain inner core 1 are pressed together, there is still at least a designed width of lateral drainage gap 3, the width of which is 1-3mm. Preferably, the designed width L of the lateral drainage gap 3 is 1.5mm, ensuring effective water flow.

[0057] Preferably, such as Figure 3 and Figure 4 As shown, the limiting structure includes a plurality of first limiting protrusions 11 formed on the upper surface of the inner core 1 of the drain, and the lower surface of the inner filter screen 2 overlaps the first limiting protrusions 11. When the upper end of the first limiting protrusion 11 is in direct contact with the lower surface of the inner filter screen 2, the height of the first limiting protrusion 11 is the width of the transverse drainage gap 3. Preferably, the number of first limiting protrusions 11 is three. Figure 5 and Figure 6 As shown, this is the installation process of the inner filter screen 2 inside the drain housing 100. As the inner filter screen 2 moves downward, the first limiting protrusion 11 will make abutting contact with the lower surface of the inner filter screen 2, thus restricting the inner filter screen 2 from moving further downward.

[0058] Preferably, such as Figures 2-18 As shown, a central rod 21 is formed in the middle of the inner filter screen 2, and a central seat 12 is formed inside the inner core of the drain inner core 1. The central seat 12 has a central insertion hole 121. The central seat 12 is connected to the inner wall of the drain inner core 1 through water-passing ribs 122, and the central rod 21 is inserted into the insertion hole 121. Preferably, there are three water-passing ribs 122. The central rod 21 cooperates with the insertion hole 121 on the central seat 12 to achieve lateral positioning of the inner filter screen 2. The central rod and the insertion hole are rubbed together, and the central rod 21 can slide in the insertion hole 121 under the action of an external force. After the external force is released, the central rod 21 is relatively stationary in the insertion hole 121, thus improving the stability of the central rod.

[0059] Preferably, such as Figures 2-11As shown, the inner filter screen 2 has an upward-facing convex filter portion 2012 at its center; preferably, the convex filter portion 2012 is a conical protrusion; an annular rubber ring 23 is provided on the outer periphery of the inner filter screen 2. The convex filter portion 2012 on the inner filter screen 2 intercepts dirt on the upper surface of the outer ring of the inner filter screen 2 when it enters, so even if the upper surface of the outer ring of the inner filter screen 2 is filled with dirt, it can be drained away through the convex filter portion 2012 after the water level rises, reducing the risk of complete blockage of the inner filter screen 2. The annular rubber ring 23 connects to the inner wall or bottom wall of the drain housing 100, reducing the risk of unfiltered sewage directly bypassing the outer periphery of the inner filter screen 2 and entering below the inner filter screen 2. Figure 5 and Figure 6 As shown, the annular rubber ring 23 can deform to adapt to changes in the inner diameter of the drain within a certain range, ensuring the installation effect.

[0060] The inner filter 2 has a handle at its center. Preferably, the lower part of the drain core 1 is connected to an odor-proof structure. The handle at the top of the inner filter 2 facilitates lifting the inner filter 2. The odor-proof structure at the bottom of the drain core 1 can be a magnetic odor-proof flip cover 4 or similar structure. Figures 2 to 10 As shown, the handle is a knob 24 formed on the inner filter screen 2.

[0061] As a second embodiment of the present invention, such as Figures 10-11 As shown, the convex filter portion 2012 is a frustum-shaped protrusion. The handle portion includes a recess 221 formed at the center of the frustum-shaped protrusion, and a protruding post 222 is formed at the center of the recess 221. The remaining structure and technical effects are the same as in the first embodiment.

[0062] As a third embodiment of the present invention, such as Figure 12 and Figure 13 As shown, the difference between this embodiment and the first embodiment is that the upper part of the inner filter screen does not have a convex filter section 2012, while the rest of the structure and technical effects are the same as the first embodiment.

[0063] As a fourth embodiment of the present invention, such as Figures 14 to 15 As shown, the limiting structure includes a plurality of second limiting protrusions 25 formed on the lower surface of the inner filter screen 2, and the second limiting protrusions 25 abut against the upper end face of the drain inner core 1. When the lower end of the second limiting protrusion 25 is in direct contact with the upper end face of the drain inner core 1, the height of the second limiting protrusion 25 is the width of the transverse drainage gap 3, such as a width of 1.5 mm. Preferably, the number of the second limiting protrusions 25 is three. The remaining structure and technical effects are the same as in the third embodiment.

[0064] As a fourth embodiment of the present invention, such as Figures 16 to 18As shown. The limiting structure includes a third limiting protrusion 211 formed on the side of the central rod 21, which can overlap the central seat 12 from top to bottom. After the central rod 21 is inserted into the lowest position in the insertion hole 121, the third limiting protrusion 211 abuts against the upper end of the central seat 12, thereby forming a transverse drainage gap 3 between the lower surface of the inner filter screen and the upper end surface of the drain core 1. For example, the width L of the transverse drainage gap 3 is 1.5mm. In this embodiment, the first limiting protrusion 11 and the second limiting protrusion 25 are not provided between the transverse drainage gaps 3, reducing the occupation of the transverse drainage gaps 3 and making the water flow smoother.

[0065] Preferably, an outer filter 110 can be installed in the upper opening of the drain housing 100, thus achieving dual filtration by the outer filter 110 and the inner filter 2. Alternatively, only the inner filter 2 can be installed, without the outer filter 110.

[0066] The present invention also provides a method for replacing a floor drain, which, using the above-mentioned improved floor drain, further includes the following steps:

[0067] ① Remove the old inner core inside the existing drain shell 100 that is pre-embedded in the ground and clean the inner cavity of the drain shell 100;

[0068] ② Insert the drain core 1 into the inner cavity of the drain housing 100;

[0069] ③ The inner filter screen 2 is placed into the drain housing 100, and a transverse drainage gap 3 is formed between the lower surface of the inner filter screen 2 and the upper end surface of the drain inner core 1; the annular rubber ring 23 on the outer periphery of the inner filter screen 2 makes sealing contact with the bottom wall or inner wall of the drain housing 100.

[0070] Compared with the prior art, the present invention ensures the existence of the transverse drainage gap 3 by setting a transverse drainage gap 3 between the lower surface of the inner filter screen 2 and the upper surface of the drain inner core 1, and by a limiting structure achieved through direct contact between the inner filter screen 2 and the drain inner core 1. In this way, the filter holes on the outer ring of the inner filter screen 2 can achieve smooth drainage.

[0071] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. An improved floor drain, characterized in that, It includes a drain inner core and an inner filter screen, wherein the drain inner core and the inner filter screen are separately disposed from the drain outer shell and can be placed inside the drain outer shell; The inner filter screen includes a filter screen body and an annular folded edge located around the filter screen body. The filter screen body consists of an upwardly protruding convex filter part and a downwardly recessed concave filter part from the center to the outer periphery. The concave filter part is provided with filter holes. The outer periphery of the concave filter part is connected to the annular folded edge. The connection point between the concave filter part and the annular folded edge is the highest point of the concave filter part and the annular folded edge. The outer periphery of the inner filter screen is connected to an annular rubber ring for abutting and sealing against the bottom wall or inner wall of the drain housing. The annular rubber ring is connected to the annular folded edge. The inner side of the annular folded edge is higher than the connection point between the annular folded edge and the annular rubber ring. Before the annular rubber ring is connected to the drain housing, the outer periphery of the annular rubber ring is lower than the outer periphery of the filter body. In its natural state, the annular rubber ring tilts outward and downward. The annular folded edge and the annular rubber ring are integrally connected. The filter body is made of plastic material, and the annular rubber ring is directly formed on the filter body during molding. There is a transverse drainage gap between the lower surface of the inner filter screen and the upper surface of the drain core; the annular rubber ring is used to seal the gap between the outer peripheral edge of the inner filter screen and the drain shell, so as to force the water entering the drain to flow through the filter holes on the concave filter part and flow into the drain core through the transverse drainage gap. The inner filter screen and the drain core have a limiting structure for supporting the inner filter screen to form a lateral drainage gap, and the limiting structure is formed on the inner filter screen and / or the drain core. The limiting structure includes a plurality of first limiting protrusions formed on the upper end face of the inner core of the drain, and the lower surface of the inner filter screen overlaps on the first limiting protrusions; or, the limiting structure includes a plurality of second limiting protrusions formed on the lower surface of the inner filter screen, and the second limiting protrusions abut against the upper end face of the inner core of the drain. A central rod is formed in the middle of the inner filter screen, and a central seat is formed inside the inner core of the drain core. The central seat has a insertion hole in the center, and the central seat is connected to the inner wall of the drain core through a water-passing rib. The central rod is inserted into the insertion hole.

2. An improved floor drain as described in claim 1, characterized in that, The limiting structure includes a third limiting protrusion formed on the side of the central rod, which can be attached to the central seat from top to bottom.

3. An improved floor drain as described in claim 1, characterized in that, The inner filter screen has a handle at its center.

4. A method for replacing a floor drain, using the improved floor drain as described in any one of claims 1-3, further comprising the following steps: ① Remove the old inner core inside the existing floor drain shell that is embedded in the ground and clean the inner cavity of the floor drain shell; ② Insert the drain core into the inner cavity of the drain shell; ③ Insert the inner filter screen into the drain housing and form a transverse drainage gap between the lower surface of the inner filter screen and the upper end face of the drain core; the annular rubber ring on the outer periphery of the inner filter screen makes a sealing contact with the bottom wall or inner wall of the drain housing.

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