An automatic closing floor drain

Abstract

This invention discloses an automatic closing floor drain, relating to the field of floor drain technology, comprising: a floor drain body, which is a vertically extending cylindrical structure, with an inlet at the top and an outlet at the bottom; a filter structure disposed at the inlet; a floating body, which is movably installed vertically within the floor drain body and has an annular gap between it and the inner circumferential wall of the floor drain body for water flow; the bottom of the floating body is fastened to the outlet, and a float is provided at its top; and when the water in the floor drain body submerges part or all of the float structure, the floating body and the float rise together and open the outlet, which can accumulate water flow in the initial stage of drainage, and then form a dynamic water seal around the outlet by increasing the water volume during drainage, effectively preventing the backflow of odors through the outlet.

Description

Technical Field

[0001] This invention relates to the field of floor drain technology, and in particular to an automatic closing floor drain. Background Technology

[0002] In existing technologies, floor drains typically rely on mechanical components or fixed water seal structures to achieve a seal and prevent odorous gases from the sewer from entering the room. These mechanical components are prone to failure after prolonged use due to wear, corrosion, or debris entanglement, leading to incomplete seals and backflow of odors. Furthermore, traditional floor drains have limited capacity to handle solid debris such as hair, fibers, and silt, which easily accumulate in the drainage channel, causing blockages and further affecting drainage and sealing. Although some floor drain structures employ a floating seal design, relying on a floating element to automatically open and close the drain outlet according to water level changes, in actual use, once water enters the drain body, the floating element rises immediately and cannot effectively seal the drain outlet during its ascent, potentially leading to odor escape. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic closing floor drain to solve the problems existing in the prior art. It can accumulate water flow in the early stage of drainage, and then form a dynamic water seal around the outlet by increasing the water volume during the drainage process, so as to fully avoid the occurrence of backflow of odor through the outlet.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides an automatically closing floor drain, comprising: The drain body has a vertically extending cylindrical structure, with an inlet at the top and an outlet at the bottom. A filter structure is provided at the inlet location; A floating body is vertically movable and installed in the drain body, and an annular gap is provided between the floating body and the inner peripheral wall of the drain body to allow water to flow through; the bottom of the floating body is fastened to the water outlet, and a float is provided on its top. Furthermore, when the water in the drain body submerges part or all of the structure of the float, the floating body lifts the float up and opens the outlet.

[0005] Optionally, multiple floats are provided and are evenly arranged around the outer periphery of the axis of the floating body, with a water supply interval between adjacent floats.

[0006] Optionally, the float includes a float body and a connecting rod. The float body is located above the floating body, and the connecting rod extends vertically and connects the float body and the floating body.

[0007] Optionally, the top of the floating body is provided with a vertically extending guide rod coaxially, and the center of the filter structure is provided with a vertically extending guide channel. The top end of the guide rod is always located in the guide channel, and the radial cross section of the guide rod matches the radial cross section structure of the guide channel. The guide rod and the guide channel are slidably inserted into each other.

[0008] Optionally, when the top end of the guide rod is inserted into the top end of the guide channel, the float and the filter structure are spaced apart.

[0009] Optionally, the top surface of the floating body has a conical structure and gradually slopes downward from the axis to the outer peripheral edge. The guide rod is located at the axis position of the top surface of the floating body, and the float is located on the top surface of the floating body.

[0010] Optionally, the bottom wall of the drain body is provided with an upward-facing annular groove, which is coaxially surrounding the outer periphery of the outlet. The bottom of the floating body is provided with an annular protrusion, which is fitted into the annular groove when it is fastened to the outlet.

[0011] Optionally, the inner peripheral edge of the annular groove surrounds to form the water outlet, the portion of the floating body located on the inner periphery of the annular protrusion overlaps the top of the water outlet, and the inner wall of the annular groove and the outer wall of the annular protrusion are at least partially spaced apart.

[0012] Optionally, a plurality of spiral ribs are provided at the bottom of the inner peripheral wall of the drain body, and the spiral ribs are distributed at equal intervals along the circumference of the drain body and the spiral direction is consistent.

[0013] Optionally, the filtering structure includes: The filter cylinder has an array of water-permeable holes, and the top of the filter cylinder is provided with an annular overlapping part protruding from its outer peripheral wall. The annular overlapping part overlaps at the top of the drain body. The filter plate has a mesh structure and abuts against the top of the filter cylinder, and the outer peripheral edge of the filter plate is detachably connected to the top of the drain body.

[0014] The present invention achieves the following technical effects compared to the prior art: This invention discloses an automatic closing floor drain, which uses a floating body that engages with the outlet at its bottom. When not draining, the floating body, under its own weight, stably closes the outlet. In the initial stage of drainage, water enters the drain body, but the volume is small and insufficient to cause the floating body to rise. In the later stage of drainage, sufficient water accumulates in the drain body, reaching the float position. The buoyancy of the floating body increases, enough to make the float rise, thus opening the outlet and draining the water. It should be noted that due to the delayed drainage by the floating body, the water volume within the drain body is sufficient... The drain is large enough to form a ring-shaped, dynamic water seal around the outlet, effectively preventing odors from the drain pipe from rising back up from the outlet. In existing technologies, the floating body opens the outlet immediately when water enters. However, when the outlet is open and the drainage volume is small, it cannot fully seal the outlet, leaving gaps where there is no water flow. This inevitably causes odors to rise back through these gaps. The automatic closing drain disclosed in this invention avoids this situation, ensuring that the outlet is fully sealed during drainage, thus solving the problem of odors easily rising back up from existing drains. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an automatically closing floor drain in one example disclosed in this invention; Figure 2 This is a schematic diagram of the overall structure of the filter plate in one example disclosed in this invention; Figure 3 This is a side view of a filter cylinder in one example disclosed in this invention; Figure 4 This is a top view of a filter cylinder in one example disclosed in this invention; Figure 5 This is a top view of a floating body in one example disclosed in this invention; Among them, 1-floor drain body, 2-filter plate, 3-filter cylinder, 4-floating body, 5-guide rod, 6-float, 7-water inlet, 8-water outlet, 9-ring protrusion, 10-ring groove, 11-ring overlap, 12-guide channel. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide an automatic closing floor drain to solve the problems existing in the prior art. It can accumulate water flow in the early stage of drainage, and then form a dynamic water seal around the outlet by increasing the water volume during the drainage process, so as to fully avoid the occurrence of backflow of odor through the outlet.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 5 As shown, the present invention provides an automatic closing floor drain, including a floor drain body 1, a filter structure, and a floating body 4. The floor drain body 1 is a vertically extending cylindrical structure. The top of the floor drain body 1 has a water inlet 7, and the bottom has a water outlet 8. It can be understood that the floor drain body 1 is closed except for the positions of the water inlet 7 and the water outlet 8, so as to guide the water flow out. The filter structure is set at the position of the water inlet 7. The floating body 4 is movably installed in the floor drain body 1 in the vertical direction, and there is an annular gap between it and the inner peripheral wall of the floor drain body 1 for water flow. It can be understood that after the water flows into the floor drain body 1 through the water inlet 7, it passes through the filter structure and then flows along this annular gap. The bottom of the floating body 4 is fastened to the water outlet 8, and the top of it is provided with a float 6. When the water in the floor drain body 1 submerges part or all of the structure of the float 6, the floating body 4 floats up with the float 6 and opens the water outlet 8.

[0021] To ensure that the floating body 4 does not float prematurely before the water flow submerges part or all of its structure and reaches the position of the float 6, in this embodiment, the main structure of the floating body 4 can be made of plastic composite material. For example, during the molding process, glass fiber and mineral fillers such as calcium carbonate and talc are added to increase the density of the plastic composite material. Alternatively, ordinary plastic structures, such as ABS plastic or PVC plastic, can be used, with multiple counterweights embedded inside, each counterweight evenly surrounding the axis of the floating body 4.

[0022] Furthermore, the float 6 can be a hollow float, such as a hollow structure made of ordinary plastic, or a foam float. This ensures that when the water level reaches the position of the float 6, the buoyancy will cause the entire floating body 4 to lift the float 6, thereby opening the outlet 8. That is, a water outlet gap is formed between the floating body 4 and the outlet 8, and it is connected to the annular gap around the floating body 4.

[0023] This invention discloses an automatic closing floor drain, in which a floating body 4 is fastened to the outlet 8 at its bottom. When not draining, the floating body 4, due to its own weight, stably closes the outlet 8. In the initial stage of drainage, water enters the drain body 1, but the volume is small and insufficient to cause the floating body 4 to float. In the later stage of drainage, the water volume in the drain body 1 is sufficient, and the water level reaches the position of the float 6. The buoyancy of the floating body 4 increases, enough to cause the float 6 to float, thus opening the outlet 8 to drain. It should be noted that due to the delayed drainage by the floating body 4, the water inside the drain body 1... With a sufficiently large water volume, a ring-shaped and dynamic water seal structure is formed around the outlet 8, which can effectively prevent odors in the sewer pipe from rising back from the outlet 8. In the prior art, the floating body 4 opens the outlet 8 immediately when water flows in. When the outlet 8 is open and the drainage volume is small, it cannot be fully sealed. That is, there will always be gaps where there is no water flow, which inevitably leads to odors rising back through these gaps. The automatic closing floor drain disclosed in this invention can avoid this situation and ensure that the outlet 8 is fully sealed during drainage, thus solving the problem of odors easily rising back from the floor drain in the prior art.

[0024] Based on the above embodiments, in some cases, the float 6 can be a single unit, surrounding the top axis of the floating body 4. In other cases, to avoid affecting the smooth flow of drainage, multiple floats 6 are provided, evenly surrounding the outer periphery of the axis of the floating body 4, with a water passage interval between adjacent floats 6, so that when some water flows along the top of the floating body 4, it can pass through this interval and be discharged, thereby reducing the impact on water discharge.

[0025] In both cases, whether the float 6 is an integral structure surrounding the axis of the floating body 4, or multiple floats 6 are provided so that they can be evenly surrounding the axis of the floating body 4, the buoyancy of the floating body 4 can be uniform, thus avoiding tilting or jamming during the ascent.

[0026] To further increase the amount of water that can open the floating body 4, in one embodiment, the float 6 includes a float 6 body and a connecting rod. The float 6 body is located above the floating body 4, and the connecting rod extends vertically and connects the float 6 body and the floating body 4. The connecting rod further raises the position of the float 6, so that the water flow can accumulate to a higher position before the floating body 4 can be opened, thereby ensuring the effectiveness of the dynamic water seal on the outlet 8 during the drainage process.

[0027] To ensure proper guidance of the floating body 4 and prevent it from tilting or getting stuck during its ascent and descent, in one embodiment, a vertically extending guide rod 5 is coaxially provided at the top of the floating body 4, and a vertically extending guide channel 12 is provided at the center of the filter structure. It should be noted that the guide channel 12 is a blind hole structure with a closed top. The top of the guide rod 5 is always located in the guide channel 12, and the radial cross-section of the guide rod 5 matches the radial cross-section of the guide channel 12. The guide rod 5 and the guide channel 12 are slidably inserted into each other. So, during the ascent of the floating body 4, the guide rod 5 is slidably inserted into the guide channel 12 and guides the floating body 4, ensuring that it remains upright and preventing it from tilting due to the influence of water flow during ascent.

[0028] In this embodiment, to further improve the sliding fit between the guide rod 5 and the guide channel 12, the guide rod 5 can adopt a multi-faceted prism structure, for example, containing at least hexagonal edges, so that each edge slides into fit with the inner wall of the guide channel 12; it can also adopt the method of providing circumferentially spaced protrusions on the outer peripheral wall of the guide rod 5, and the protrusions extending along the axial direction of the guide rod 5, so that each protrusion slides into fit with the inner wall of the guide channel 12.

[0029] It is understandable that the guide rod 5 is provided with a multi-faceted prism structure or a raised strip to form a gap between two adjacent edges or two adjacent raised strips, so as to fully discharge the water flowing into the inner wall of the guide channel 12 and avoid affecting the guidance of the guide rod 5.

[0030] In this embodiment, the guide channel 12 is enclosed except for its bottom through hole, to prevent water from entering its interior and affecting the guidance of the guide rod 5.

[0031] To reduce impact damage to the float 6 and extend the service life of the entire device, in one embodiment, when the top end of the guide rod 5 is inserted at the top end of the guide channel 12, the float 6 and the filter structure are spaced apart, that is, the top end of the guide rod 5 is inserted at the top end of the guide channel 12.

[0032] The top surface of the floating body 4 has a conical structure, and it gradually slopes downward from the axis to the outer edge. This conical structure guides the water flow entering the drain body 1, allowing it to quickly drain into the annular gap around the floating body 4. This also prevents water from accumulating on the top surface of the floating body 4, which would affect its buoyancy. In this embodiment, the guide rod 5 is positioned at the axis of the top surface of the floating body 4, and the float 6 is positioned on the top surface of the floating body 4.

[0033] To further ensure an effective seal at the outlet 8 when no water is drained, thus preventing backflow of odors, in one embodiment, an annular groove 10 with an upward opening is provided at the bottom wall of the drain body 1. The annular groove 10 is coaxially wrapped around the outer periphery of the outlet 8. An annular protrusion 9 is provided at the bottom of the floating body 4. When the annular protrusion 9 is engaged with the bottom of the floating body 4 at the outlet 8, it is fitted into the annular groove 10, so as to form a curved surface fit between the annular protrusion 9 and the annular groove 10. As a result, the residual water flow can be located between the annular protrusion 9 and the annular groove 10, forming a water seal.

[0034] Based on the above implementation method, the inner peripheral edge of the annular groove 10 forms the outlet 8. The floating body 4 is partially attached to the top of the outlet 8 on the inner periphery of the annular protrusion 9. The inner wall of the annular groove 10 and the outer wall of the annular protrusion 9 are at least partially spaced apart. That is, the floating body 4 is attached to the top of the outlet 8 to achieve the positioning function of the floating body 4. On this basis, a corresponding curved surface interval is formed between the annular groove 10 and the annular protrusion 9, which can effectively accumulate the remaining water flow and form an effective water seal around the outlet 8.

[0035] In order to ensure that the floating body 4 can be accurately positioned at the top of the outlet 8, the part of the floating body 4 located on the inner periphery of the annular protrusion 9 has a structure that matches the structure of the top of the outlet 8, so that the annular protrusion 9 can be engaged around the top of the outlet 8.

[0036] Moreover, in other examples, the inner wall of the annular groove 10 and the part near the outlet 8 can be in the form of a positive conical structure, and the inner peripheral wall of the corresponding annular protrusion 9 also adopts a positive conical structure so that the two positive conical structures can be matched when the floating body 4 overlaps the top of the outlet 8.

[0037] With the inner wall of the annular groove 10 and the outer wall of the annular protrusion 9 at least partially spaced apart, it is understood that in some cases, the radial cross-sections of both the annular groove 10 and the annular protrusion 9 are semi-circular structures with the same curvature, thus forming a uniform arc-shaped gap between the annular groove 10 and the annular protrusion 9 to accommodate residual water flow. In other cases, the curvature of the annular groove 10 is greater than that of the annular protrusion 9, so that both ends of the annular protrusion 9 abut against the sides of the annular groove 10 along its radial direction, and an arc-shaped gap is formed between its middle position and the middle position of the annular groove 10 to accommodate residual water flow.

[0038] To effectively flush the annular groove 10 and prevent impurities from accumulating there, in one embodiment, multiple spiral ribs are provided at the bottom of the inner peripheral wall of the drain body 1. The spiral ribs are evenly distributed around the circumference of the drain body 1 and have the same spiral direction. When the water flows along the annular intervals on the outer periphery of the floating body 4, it can be guided by the spiral ribs, so that the water flows in a spiral shape, thereby achieving effective flushing of the annular groove 10.

[0039] In this method, to further improve the guiding effect on water flow and impurities in the annular groove 10, the inner wall of the annular groove 10 is provided with multiple spiral ribs at least on the side near the outlet 8. Each spiral rib is evenly distributed around the circumference of the drain body 1, and its spiral direction is consistent with the spiral direction of the water flow. When the spiral water flow passes through this place, the water flow and impurities can be further spiraled by the guiding effect of each spiral rib, and can be effectively and quickly discharged from the annular groove 10.

[0040] Alternatively, in other examples, the annular groove 10 has multiple spiral grooves on its inner wall, at least on the side near the outlet 8. Each spiral groove is evenly distributed around the circumference of the drain body 1, and its spiral direction is consistent with the spiral direction of the water flow. When the spiral water flows through this area, the water flow and impurities can be further spiraled by the guidance of each spiral groove, and can be effectively and quickly discharged from the annular groove 10.

[0041] Based on all the above embodiments, the filter structure includes a filter cylinder 3 and a filter plate 2. The filter cylinder 3 has an array of water-permeable holes, and the top of the filter cylinder 3 is provided with an annular overlapping part 11 protruding from its outer peripheral wall. The annular overlapping part 11 overlaps at the top of the drain body 1. The filter plate 2 has a mesh structure and abuts against the top of the filter cylinder 3. The outer peripheral edge of the filter plate 2 is detachably connected to the top of the drain body 1. The water discharged into the drain body 1 passes through the filtration effect of the filter plate 2 and the filter cylinder 3 once, which can intercept most of the hair or other larger impurities, and prevent them from being discharged into the drain body 1 or the outlet 8 and causing blockage.

[0042] In this embodiment, the top of the drain body 1 is provided with a two-step structure, which can be used to overlap the annular overlapping part 11 at the top of the filter cylinder 3 and the outer peripheral edge of the filter plate 2, respectively. Furthermore, the inner peripheral wall of the step structure used to overlap the outer peripheral edge of the filter plate 2 can be detachably connected to the outer peripheral wall of the filter plate 2 by means of threaded connection or snap-fit ​​connection, and can press down on the filter cylinder 3 to prevent it from floating and detaching from the drain body 1 during use.

[0043] It should also be noted that the filter plate 2 and the filter cylinder 3 are coaxially arranged, and the structure of the filter plate 2 is larger than the radial cross section of the filter cylinder 3, so as to achieve primary filtration of the water flow.

[0044] It is understandable that the guide channel 12 is located at the axial position of the filter cylinder 3, and it is a structure independent of the inner cavity of the filter cylinder 3. The bottom of the guide channel 12 is connected to the bottom position of the filter cylinder 3.

[0045] To expand the filtration surface of the filter cylinder 3 and improve its filtration effect, the bottom surface of the filter cylinder 3 has a conical structure. Furthermore, the taper of the bottom surface of the filter cylinder 3 is smaller than the taper of the top surface of the floating body 4, so that there is sufficient space to accommodate the float 6.

[0046] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0047] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An automatic closing floor drain, characterized by, include: The drain body has a vertically extending cylindrical structure, with an inlet at the top and an outlet at the bottom. A filter structure is provided at the inlet location; A floating body is vertically movable and installed in the drain body, and an annular gap is provided between the floating body and the inner peripheral wall of the drain body to allow water to flow through; the bottom of the floating body is fastened to the water outlet, and a float is provided on its top. Furthermore, when the water in the drain body submerges part or all of the structure of the float, the floating body lifts the float up and opens the outlet.

2. The self-closing floor drain of claim 1, wherein, The floats are provided in multiples and are evenly arranged around the outer periphery of the axis of the floating body, with a water supply interval between each pair of adjacent floats.

3. The self-closing floor drain of claim 2, wherein, The float includes a float body and a connecting rod. The float body is located above the floating body, and the connecting rod extends vertically and connects the float body and the floating body.

4. The self-closing floor drain of claim 1, wherein, The top of the floating body is coaxially provided with a vertically extending guide rod, and the center of the filter structure is provided with a vertically extending guide channel. The top of the guide rod is always located in the guide channel, and the radial cross-section of the guide rod matches the radial cross-section structure of the guide channel. The guide rod and the guide channel are slidably inserted into each other.

5. The self-closing floor drain of claim 4, wherein, When the top end of the guide rod is inserted into the top end of the guide channel, the float and the filter structure are spaced apart.

6. The self-closing floor drain of claim 4, wherein, The top surface of the floating body has a conical structure and gradually slopes downward from the axis to the outer peripheral edge. The guide rod is located at the axis position of the top surface of the floating body, and the float is located on the top surface of the floating body.

7. The self-closing floor drain of claim 1, wherein, The bottom wall of the drain body is provided with an upward-facing annular groove. The annular groove is coaxially surrounded around the outer periphery of the water outlet. The bottom of the floating body is provided with an annular protrusion. When the annular protrusion is fastened to the bottom of the floating body at the water outlet, it is embedded in the annular groove.

8. The self-closing floor drain of claim 7, wherein, The outlet is formed by the inner periphery of the annular groove, the floating body is located on the top of the outlet at the inner periphery of the annular protrusion, and the inner wall of the annular groove and the outer wall of the annular protrusion are at least partially spaced apart.

9. The self-closing floor drain of claim 1, wherein, The drain body has multiple spiral ribs at the bottom of its inner circumferential wall. The spiral ribs are evenly distributed along the circumference of the drain body and have the same spiral direction.

10. The automatic closing floor drain according to claim 1, characterized in that, The filtering structure includes: The filter cylinder has an array of water-permeable holes, and the top of the filter cylinder is provided with an annular overlapping part protruding from its outer peripheral wall. The annular overlapping part overlaps at the top of the drain body. The filter plate has a mesh structure and abuts against the top of the filter cylinder, and the outer peripheral edge of the filter plate is detachably connected to the top of the drain body.

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