Floor drain fitting with anti-backsiphonage water seal

Abstract

The utility model relates to building drainage technical field discloses a ground drainage pipe fitting with prevent return smell water seal structure, including U type's drain pipe, and with the drain pipe entrance fixed connection prevents the smell component, the entrance fixed connection of preventing the smell component has quick detachable assembly, the preventing smell component includes arc pipe, the bottom sheet of rotation connection in arc pipe export end, rotation rod and be used for in the water flow stoppage reset bottom sheet's connecting piece, quick detachable assembly includes first connecting pipe, second connecting pipe, the shell of setting in junction and set up in the shell inside's steel ball. The utility model through preventing the smell component and the combination of U type drain pipe, solved the traditional water seal dry river after the problem of preventing stink failure, simultaneously, quick detachable assembly realized the quick, reliable connection and self -sealing of external drainage pipe, effectively prevented the water flow overflow and stench leak, improved the use convenience and environmental health.

Description

Technical Field

[0001] This utility model relates to the field of building drainage technology, and in particular to a ground drainage pipe fitting with an anti-backflow water seal structure. Background Technology

[0002] Floor drain fittings, commonly known as floor drains, are crucial interfaces connecting indoor drainage systems to drainage pipes. Their core function is to facilitate drainage and prevent the backflow of pollutants, insects, and other contaminants from the drainage pipes into the room. Traditional floor drain fittings, such as those commonly found in bathrooms and kitchens, primarily rely on U-shaped or P-shaped water traps to create a water seal, using a certain amount of water to isolate sewer odors. This water seal structure is widely used due to its simplicity and effectiveness.

[0003] However, traditional single-trap drain structures have significant drawbacks. In practical use, if the drain is not used for an extended period, such as when residents are away for a long time, the water in the trap will gradually decrease due to evaporation and may even dry out completely. Once the water seal is lost, harmful gases such as hydrogen sulfide and methane from the sewer can flow back into the room directly through the drain pipe, causing environmental pollution and health risks. A further problem is that when temporary or long-term connections to other drainage devices are needed, such as the drain hoses for washing machines, sinks, or mop basins, existing drains or drain pipes often lack specially designed interfaces that allow for quick connection and disassembly while ensuring a high degree of seal at the connection. Users typically have to simply insert the hose into the drain opening, which not only results in an unstable connection and easy water overflow, but more importantly, it fails to effectively prevent odors from leaking through the connection gaps, rendering the anti-odor function completely ineffective and even becoming a source of odor backflow.

[0004] Therefore, this utility model proposes a ground drainage pipe fitting with an anti-backflow water seal structure to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems in the existing technology of ground drainage pipe fittings with anti-odor water seal structure, such as the failure of the anti-odor function of the water seal structure after evaporation and drying, and the lack of a fast and sealed external drainage interface, this utility model aims to provide a ground drainage pipe fitting with anti-odor water seal structure that has been improved in structure and can effectively solve the above problems.

[0006] This utility model provides a ground drainage pipe fitting with an anti-backflow water seal structure, including: a U-shaped drainage pipe, an anti-backflow component fixedly connected to the inlet of the drainage pipe, and a quick-release component fixedly connected to the inlet of the anti-backflow component.

[0007] The anti-odor component has a mechanical valve structure including an arc-shaped tube, a base plate, a rotating rod, and a connecting plate, and the quick-release component has a self-sealing quick-release structure including a first connecting tube, a second connecting tube, a shell, a steel ball, and an internally linked first firing pin, a first spring, a second firing pin, and a second spring.

[0008] Furthermore, the bottom plate is rotatably connected to the arc-shaped tube outlet end of the anti-odor component, and the bottom plate is drivenly connected to the connecting piece through the rotating rod; the first connecting tube of the quick-release component is fixedly connected to the inlet end of the arc-shaped tube, and the second connecting tube is detachably connected to the first connecting tube; the outer shell is sleeved at the connection between the first connecting tube and the second connecting tube; the first connecting tube and the second connecting tube are slidably arranged with interacting first and second striking pins inside the first connecting tube and the second connecting tube; when the first connecting tube and the second connecting tube are connected, the steel ball slides into the groove on the outer wall of the first connecting tube, and at the same time, the first striking pin and the second striking pin squeeze each other and compress their respective springs, so that the valves at their tails open each other, thereby connecting the first connecting tube and the second connecting tube.

[0009] Preferably, the connecting piece is an elastic element. To ensure the reliability of its reset function, one end of the connecting piece is fixed to the outer wall of the arc-shaped tube, and the other end is elastically abutted against the bottom plate. It provides a continuous reset force through its own elastic deformation, ensuring that the bottom plate can be pushed back to the closed position in time after the water flow stops.

[0010] Preferably, in order to achieve self-sealing of the quick-release assembly in the disconnected state, the first connecting tube is provided with a first valve seat inside. The first spring pushes the tail valve of the first striker to close the first valve seat in the natural state. Similarly, the second connecting tube is also provided with a second valve seat inside. The second spring pushes the tail valve of the second striker to close the second valve seat in the natural state, forming a double safety.

[0011] Preferably, in order to improve the stability and locking force of the connection, the quick-release assembly has several steel balls arranged in the circumferential direction inside the housing. The evenly distributed steel balls can be simultaneously inserted into the groove from multiple directions, making the locking more secure, effectively resisting the pulling force from different directions, and preventing accidental dislodgement.

[0012] Preferably, in order to further enhance the sealing performance at the connection, the connection ends of the first connecting pipe and the second connecting pipe are provided with an annular sealing ring. The annular sealing ring is radially disposed in the gap between the connection surfaces of the first connecting pipe and the second connecting pipe. After connection, it is compressed to fill any possible tiny gaps, effectively preventing liquid leakage and gas overflow.

[0013] Preferably, both the first and second striking pins are stepped shaft structures. This structure provides clear positioning steps for the installation of the springs. The first and second springs are respectively sleeved on the rods of the first and second striking pins, ensuring the stability of the springs during compression and rebound, avoiding skewing or jamming, and ensuring smooth opening and closing of the valve.

[0014] Preferably, the groove on the outer wall of the first connecting pipe is an annular groove. The annular groove structure allows the second connecting pipe to lock with the first connecting pipe at any rotation angle, which greatly improves the convenience of installation and docking, and eliminates the need for cumbersome angle alignment.

[0015] Preferably, the arc-shaped tube has an overall L-shaped curved tube structure. Its inlet is set horizontally to facilitate docking with the quick-release assembly, while its outlet is vertically downward to utilize the gravity effect, which helps the water flow smoothly and effectively push the substrate. The L-shaped structure also makes the layout of the entire device more compact, making it easier to install in a small space.

[0016] This utility model has the following beneficial effects: 1. This utility model achieves water seal odor prevention by setting a U-shaped drain pipe, and at the same time, it combines an anti-odor component with a bottom plate, rotating rod and connecting plate to solve the problem of odor prevention failure of the water seal structure after the water dries up in the prior art. It achieves the effect of providing mechanical auxiliary odor prevention and realizing double physical isolation odor prevention.

[0017] 2. This utility model, by setting a quick-release component, which includes a first connecting pipe, a second connecting pipe, and an internally linked opening pin and spring, solves the problem of the lack of a fast, reliable and sealed external drain pipe interface in the prior art. It achieves self-sealing when the external drain pipe is connected and disconnected, effectively preventing water overflow and odor leakage at the connection point, and improving the convenience of use and environmental hygiene.

[0018] 3. This utility model solves the problem of unstable connection of the outer pipe fitting in the prior art by setting a locking structure consisting of a shell and steel balls in the quick-release assembly. It achieves the technical effect of simple connection operation and stable and reliable locking, and can withstand a certain amount of external force without falling off. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a ground drainage pipe fitting with an anti-odor water seal structure proposed in this utility model; Figure 2 This is a schematic diagram of the bottom plate structure of a ground drainage pipe fitting with an anti-odor water seal structure proposed in this utility model; Figure 3This is a schematic diagram of the arc-shaped pipe section of a ground drainage pipe fitting with an anti-odor water seal structure proposed in this utility model. Figure 4 This is a schematic diagram of the first connecting pipe portion of a ground drainage pipe fitting with an anti-odor water seal structure proposed in this utility model. Figure 5 This is a schematic diagram of the first spring portion of a ground drainage pipe fitting with an anti-odor water seal structure proposed in this utility model.

[0020] Legend: 1. Drain pipe; 2. Anti-odor component; 201. Arc-shaped pipe; 202. Base plate; 203. Rotating rod; 204. Connecting piece; 3. Quick-release component; 301. First connecting pipe; 302. Steel ball; 303. First spring; 304. First firing pin; 305. Second spring; 306. Second firing pin; 307. Outer shell; 308. Second connecting pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] Example:

[0023] Please refer to Figures 1 to 5 This utility model provides a ground drainage pipe fitting with an anti-odor water seal structure, which aims to solve the problems of the water seal structure of existing ground drainage pipe fittings failing to prevent odor after the water dries up and the lack of a quick-sealing interface for the external drainage pipe 1.

[0024] like Figure 1 and Figure 2 As shown, the ground drainage pipe fitting with anti-odor water seal structure includes a U-shaped drainage pipe 1 and an anti-odor component 2 fixedly connected to the inlet of the drainage pipe 1. The inlet of the anti-odor component 2 is fixedly connected to a quick-release component 3. The drainage pipe 1 is used to form a water seal through the U-shaped structure to prevent odor backflow. The anti-odor component 2 is used to achieve mechanical sealing after the water flow stops to provide a second layer of odor protection. The quick-release component 3 is used to provide a quick and sealed connection to the external drainage pipe 1.

[0025] The anti-odor component 2 includes an arc-shaped tube 201, a base plate 202 rotatably connected to the outlet end of the arc-shaped tube 201, a rotating rod 203, and a connecting piece 204. The base plate 202 is the core component that is pushed open by gravity when the water flows through the arc-shaped tube 201. When the water flows downward through the arc-shaped tube 201, gravity will overcome the weight of the base plate 202 and the restoring force of the connecting piece 204 to push it open. The rotating rod 203 is rotatably connected to the base plate 202 and is connected to the connecting piece 204 in a transmission manner. The connecting piece 204 is used to drive the base plate 202 to spring back and reset after the water flow stops, thereby sealing the outlet end of the arc-shaped tube 201 and effectively preventing sewer odors or pests from rising back up.

[0026] The quick-release component 3 is the core innovative structure of this utility model. It includes a first connecting pipe 301 fixedly connected to the inlet end of the arc-shaped pipe 201, a second connecting pipe 308 detachably connected to the first connecting pipe 301, and a housing 307 sleeved at the connection between the first connecting pipe 301 and the second connecting pipe 308. The housing 307 is also provided with a steel ball 302 inside, which is used to achieve reliable locking when connected. The first connecting pipe 301 and the second connecting pipe 308 are respectively provided with a striker and a spring assembly that are linked to open, which are used to automatically clear the pipeline and achieve sealing when connected.

[0027] To solve the above technical problems, the quick-release component 3 has a precision linkage structure inside, and the anti-odor component 2 has a reliable reset design.

[0028] Please refer to the following carefully. Figure 3 , Figure 4 and Figure 5 The first connecting tube 301 has a first striking pin 304 and a first spring 303 slidably disposed inside. Similarly, the second connecting tube 308 has a second striking pin 306 and a second spring 305 slidably disposed inside. Both the first striking pin 304 and the second striking pin 306 have a stepped shaft structure. The first spring 303 and the second spring 305 are respectively sleeved on the rod portion of the first striking pin 304 and the second striking pin 306. The first connecting tube 301 has a first valve seat inside. In its natural state, the first spring 303 pushes the valve at the tail of the first striking pin 304 to close the first valve seat. Similarly, the second connecting pipe 308 is also provided with a second valve seat. In its natural state, the second spring 305 pushes the tail valve of the second striking pin 306 to close the second valve seat, thus forming a seal in the non-connected state. When connection is required, the second connecting pipe 308 is pushed closer to the first connecting pipe 301, and the ports of the two connecting pipes are connected. At this time, the front end of the first striking pin 304 and the front end of the second striking pin 306 squeeze each other, forcing the two striking pins to overcome the elastic force of their respective springs and retract, so that the valve at the tail of their pins disengages from the valve seat, thereby opening the fluid passage.

[0029] Meanwhile, to lock the first connecting pipe 301 and the second connecting pipe 308, the outer wall of the first connecting pipe 301 is provided with a groove, which is an annular groove. Several steel balls 302 are provided circumferentially inside the outer shell 307. During the process of the second connecting pipe 308 being pushed towards the first connecting pipe 301, the inner wall contour of the outer shell 307 guides the steel balls 302 to move inward and finally get stuck in the annular groove on the outer wall of the first connecting pipe 301. This matching structure of the steel balls 302 and the annular groove ensures a fast and stable connection and prevents accidental detachment. An annular sealing ring 5 is also provided at the connection end of the first connecting pipe 301 and the second connecting pipe 308. The annular sealing ring 5 is radially arranged in the gap between the connection surfaces of the first connecting pipe 301 and the second connecting pipe 308 to ensure liquid sealing at the connection.

[0030] For the anti-odor component 2, the arc-shaped tube 201 has an L-shaped bend structure. Its inlet is set horizontally to receive water from the quick-release component 3 smoothly, and its outlet is vertically downward to drain water by gravity. The connecting piece 204 is an elastic element. One end of it is fixed to the outer wall of the arc-shaped tube 201, and the other end abuts against the bottom plate 202. When the water flow stops and the gravity pushing the bottom plate 202 disappears, the elastic restoring force of the connecting piece 204 will actively push the bottom plate 202 back to the closed position, ensuring the timeliness and reliability of the anti-odor function.

[0031] In a preferred embodiment, the connecting piece 204 is an elastic element. One end of the connecting piece 204 is fixed to the outer wall of the arc-shaped tube 201 by adhesive or riveting, while the other end of the connecting piece 204 elastically contacts and abuts against the bottom plate 202. The connecting piece 204 provides a restoring force through its own deformation energy storage, which is used to push the bottom plate 202 back to the initial closed position after the gravity of the water flow disappears. This elastic element structure ensures the self-resetting capability of the mechanical valve and the real-time odor prevention.

[0032] In another preferred embodiment, the first connecting pipe 301 is provided with a first valve seat, which is integrally formed on the inner wall of the first connecting pipe 301. The first spring 303 pushes the tail valve of the first striking pin 304 to tightly seal the first valve seat in its natural state, preventing liquid or gas from leaking from the first connecting pipe 301. The second connecting pipe 308 is also provided with a second valve seat. The second spring 305 pushes the tail valve of the second striking pin 306 to tightly seal the second valve seat in its natural state. The double valve seat structure ensures that both ends of the quick-release assembly 3 can maintain a high degree of sealing when not connected.

[0033] In another preferred embodiment, the quick-release assembly 3 has several steel balls 302 evenly arranged in the circumferential direction inside the housing 307. For example, three or four steel balls 302 can be provided. These steel balls 302 are guided by the inner wall contour of the housing 307 and are locked into the groove on the outer wall of the first connecting tube 301. The evenly distributed steel balls 302 can provide a more stable radial locking force, prevent shaking and radial leakage after connection, and can withstand a large external pulling force.

[0034] In another preferred embodiment, an annular sealing ring is provided circumferentially at the connection end of the first connecting pipe 301 and the second connecting pipe 308. The annular sealing ring is preferably made of corrosion-resistant rubber or silicone. The annular sealing ring is radially disposed in the gap between the connection surfaces of the first connecting pipe 301 and the second connecting pipe 308. When the two connecting pipes are connected and locked, the annular sealing ring is radially compressed to form a reliable static seal, which further enhances the sealing performance of the connection and effectively prevents liquid leakage and odor backflow.

[0035] In another preferred embodiment, both the first striking pin 304 and the second striking pin 306 are stepped shaft structures, with a small diameter area on their rods. The first spring 303 and the second spring 305 are respectively sleeved on the small diameter areas of the rods of the first striking pin 304 and the second striking pin 306. This stepped shaft structure not only ensures the installation and positioning of the springs, but also reduces the friction between the springs and the inner wall of the pipe, ensuring smooth sliding of the striking pins and reliable opening and closing of the valve.

[0036] As another preferred embodiment, the groove on the outer wall of the first connecting pipe 301 is an annular groove. The annular groove surrounds the outer circumference of the first connecting pipe 301. This annular structure can reliably achieve engagement and locking with the steel ball 302 when the outer pipe fitting is rotated at any angle, thus improving the convenience of the connection operation.

[0037] As another preferred embodiment, the arc-shaped pipe 201 has an overall L-shaped bend structure. Its inlet is set horizontally for easy connection with the quick-release assembly 3, and its outlet is set vertically downward to guide the water flow smoothly into the drain pipe 1. The L-shaped bend structure makes the installation space of the entire anti-odor assembly 2 more compact, which is suitable for the narrow installation environment of ground drainage.

[0038] The working principle of this utility model of a ground drainage pipe fitting with an anti-odor water seal structure is as follows: This drainage pipe fitting has a triple anti-backflow odor function: the water seal of the U-shaped drainage pipe 1, the mechanical valve of the anti-backflow odor component 2, and the self-sealing of the quick-release component 3.

[0039] When an external drain pipe 1 is needed, such as when connecting a washing machine to drain, manually push the second connecting pipe 308 closer to the first connecting pipe 301. The second connecting pipe 308 slides into the interior of the outer casing 307. The contour of the inner wall of the outer casing 307 guides the steel ball 302 to move inward and lock into the annular groove on the outer wall of the first connecting pipe 301, completing the locking and connection of the two pipes. At the same time, the annular sealing ring between the connecting ends of the first connecting pipe 301 and the second connecting pipe 308 is compressed to form a seal at the connection. During the connection locking process, the front ends of the first striking pin 304 and the second striking pin 306 inside the two connecting pipes press against each other. The two striking pins overcome the elastic force of their respective springs (first spring 303 and second spring 305) and retract backward, causing the valves at their tails to disengage from their respective valve seats, releasing the blockage of the pipes, and making the pipes connected between the first connecting pipe 301 and the second connecting pipe 308, realizing a fast and sealed external drainage connection.

[0040] When water flows from the outer pipe fitting into the quick-release assembly 3 and towards the anti-odor assembly 2, the water flows in from the first connecting pipe 301 and the arc-shaped pipe 201. The gravity of the water acts on the bottom plate 202, overcoming the weight of the bottom plate 202 and the restoring force of the connecting piece 204, pushing the bottom plate 202 to rotate downwards and open. At this time, the rotating rod 203 rotates and drives the connecting piece 204 to move. The water flows downwards through the opened bottom plate 202 and finally flows into the U-shaped drain pipe 1 to complete the drainage. When the drainage is completed, the gravity of the water disappears, and the elastic restoring force of the connecting piece 204 drives the bottom plate 202 to rebound and reset through the rotating rod 203, thereby tightly sealing the outlet of the arc-shaped pipe 201, forming a mechanical anti-odor barrier to prevent odors and pests from flowing back through this path. Finally, the water forms a water seal in the U-shaped bend of the drain pipe 1, providing the most basic and reliable anti-odor function.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A ground drainage pipe fitting with an anti-backflow water seal structure, comprising a U-shaped drainage pipe (1) and an anti-backflow component (2) fixedly connected to the inlet of the drainage pipe (1), wherein a quick-release component (3) is fixedly connected to the inlet of the anti-backflow component (2). Its features are, The anti-odor component (2) includes: an arc-shaped tube (201), a bottom plate (202) rotatably connected to its outlet end, a rotating rod (203) and a connecting piece (204). The connecting piece (204) is used to drive the bottom plate (202) to reset via the rotating rod (203) after the water flow stops, so as to close the outlet of the arc-shaped tube (201). The quick-release assembly (3) includes: a first connecting tube (301) and a second connecting tube (308) that can be detachably connected to each other, a housing (307) sleeved at the connection between the two, a steel ball (302) disposed in the housing (307), and a first firing pin (304) and a first spring (303), a second firing pin (306) and a second spring (305) respectively slidably disposed inside the first connecting tube (301) and the second connecting tube (308), and a valve is provided at the tail of the first firing pin (304) and the second firing pin (306); When the first connecting pipe (301) is connected to the second connecting pipe (308), the steel ball (302) is inserted into the groove on the outer wall of the first connecting pipe (301) to achieve locking. At the same time, the first striking pin (304) and the second striking pin (306) squeeze each other, causing the valves at their respective tails to be opened, thereby connecting the two pipes.

2. The ground drainage pipe fitting with an anti-odor water seal structure according to claim 1, characterized in that, The connecting piece (204) is an elastic element, one end of which is fixed to the outer wall of the arc-shaped tube (201), and the other end is used to abut against the bottom piece (202) to provide a restoring force.

3. The ground drainage pipe fitting with an anti-backflow water seal structure according to claim 1, characterized in that, Both the first connecting pipe (301) and the second connecting pipe (308) are equipped with valve seats. The first spring (303) and the second spring (305) respectively push the valves at the tails of the first striking pin (304) and the second striking pin (306) to close the corresponding valve seats.

4. The ground drainage pipe fitting with an anti-backflow water seal structure according to claim 1, characterized in that, The outer shell (307) contains several steel balls (302) arranged circumferentially inside.

5. The ground drainage pipe fitting with an anti-backflow water seal structure according to claim 1, characterized in that, An annular sealing ring is provided between the connecting ends of the first connecting pipe (301) and the second connecting pipe (308).

6. The ground drainage pipe fitting with an anti-backflow water seal structure according to claim 1, characterized in that, The first striking pin (304) and the second striking pin (306) are both stepped shaft structures, and the first spring (303) and the second spring (305) are respectively sleeved on their rods.

7. The ground drainage pipe fitting with an anti-odor water seal structure according to claim 1, characterized in that, The groove on the outer wall of the first connecting pipe (301) is an annular groove.

8. The ground drainage pipe fitting with an anti-backflow water seal structure according to claim 1, characterized in that, The arc-shaped pipe (201) has an L-shaped bend structure with its inlet set horizontally and its outlet set vertically downward.

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