Drainage opening anti-drying water seal device and urinal and washing basin thereof

Abstract

The utility model relates to a water outlet anti-drying water seal device and a urinal and a washing basin thereof. The problem of water seal drying is solved. The upstream end of the U-shaped trap pipe extends upwards to be connected with an expanding pipe, the downstream end of the U-shaped trap pipe extends upwards to be connected with an expanding end socket pipe, and the extending and connecting area of the expanding end socket pipe and the downstream end and the downstream end jointly laterally communicate with a lower discharging pipe or the lower portion of the expanding end socket pipe laterally communicates with the lower discharging pipe. An upstream floating ball with the diameter larger than that of the upstream end of the U-shaped trap pipe is arranged in the expanding pipe, a downstream floating ball with the diameter larger than that of the downstream end of the U-shaped trap pipe and that of the upstream end of the lower discharging pipe is arranged in the expanding end socket pipe, and the diameter of the floating balls is obviously smaller than the inner diameter of the expanding pipe and the inner diameter of the expanding end socket pipe. The device has the advantages of water seal upstream and downstream two-way floating ball sealing, long-time water seal and prevention of backflow of airflow in a sewer pipeline, and good odor isolation effect.

Description

Technical Field

[0001] The utility model relates to a water seal device for a water outlet, in particular to a water seal device for preventing a water outlet from drying up, a urinal and a washbasin thereof. Background Art

[0002] The phenomenon that foul smell comes back upward due to the drying up of the water seal at the water outlet is still a common problem that has not been thoroughly solved in the field. There is a water-saving automatic plugging trap with the literature number CN 209114558 U, which includes a trap body (1), a floating ball (2) and a retaining ring (3). The trap body (1) is provided with a water seal part (9) for storing sewage and preventing the reverse flow of waste gas. The retaining ring (3) is located above the outlet of the water seal part (9). The floating ball (2) is clamped on the outlet of the retaining ring (3) and plugs the retaining ring (3). The trap body (1) further includes a water inlet (8) arranged at the water inlet end of the water seal part (9) and a movable cavity (12) arranged at the water outlet end of the water seal part (9). The outlet of the movable cavity (12) is provided with a water outlet (10). The floating ball (2) and the retaining ring (3) are both arranged in the movable cavity (12). The retaining ring (3) is arranged at the corresponding position of the movable cavity (12) at the water outlet end of the water seal part (9). One side of the movable cavity (12) is provided with an annular boss (11). A first pipe plug (5) is arranged on the annular boss (11). A sealing ring (4) is arranged between the first pipe plug (5) and the annular boss (11). The diameter of the outlet of the retaining ring (3) is smaller than the diameter of the floating ball (2). The bottom of the water seal part (9) is provided with a sewage outlet (7) and a second pipe plug (6). The sewage outlet (7) and the second pipe plug (6) are fixedly connected by threads. However, it still cannot prevent the water seal from drying up well. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above defects of the prior art and provide a water seal device for preventing a water outlet from drying up, a urinal and a washbasin thereof.

[0004] To achieve the above object, the anti-drying water seal device for the water outlet of the utility model is characterized in that the upstream end of the U-shaped water storage bend pipe is upwardly extended to connect with an enlarged diameter pipe, and the downstream end of the U-shaped water storage bend pipe is upwardly extended to connect with an enlarged diameter head pipe. The enlarged diameter head pipe is laterally connected with the downstream pipe or the lower part of the enlarged diameter head pipe is laterally connected with the downstream pipe through the connection area of the downstream end and the downstream end. An upstream floating ball with a diameter larger than the upstream end diameter of the U-shaped water storage bend pipe is arranged in the enlarged diameter pipe, and a downstream floating ball with a diameter larger than the downstream end diameter of the U-shaped water storage bend pipe and the upstream end diameter of the downstream pipe is arranged in the enlarged diameter head pipe. The diameter of the floating ball is significantly smaller than the inner diameters of the enlarged diameter pipe and the enlarged diameter head pipe, that is, there is enough clearance space for the water flow to pass through between the floating ball and the enlarged diameter pipe and the enlarged diameter head pipe. The upstream end of the U-shaped water storage bend pipe is higher than the upstream end of the downstream pipe, so as to ensure that the upstream floating ball can timely close the upstream port of the U-shaped water storage bend pipe after the water is discharged downstream, which is beneficial to avoiding the upward return of the water seal odor. In this way, after the water enters the enlarged diameter pipe, the upstream floating ball in the enlarged diameter pipe will be floated by the incoming water, and the water will further enter the U-shaped water storage bend pipe, and the downstream floating ball in the enlarged diameter head pipe will also be floated, so as to unblock the downstream channel. After the water is discharged downstream, the downstream floating ball will lose the buoyancy support and sink due to the lower position of the downstream pipe than the upstream end of the U-shaped water storage bend pipe, blocking the upstream end of the U-shaped water storage bend pipe and automatically forming a floating ball seal, which plays a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the upstream end. Although there will be water storage at the downstream end of the U-shaped water storage bend pipe connected to the downstream pipe, however, as the water at the unclosed downstream end evaporates into the sewer, when the water level sinks to a certain extent due to evaporation, the downstream floating ball will also close the open part of the downstream end of the U-shaped water storage bend pipe due to the loss of buoyancy support, playing a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the downstream end; thus forming the function of preventing the evaporation and loss of the water seal water at both the upstream and downstream ends of the U-shaped water storage bend pipe by the two-way floating ball seal. In particular, when there is an air flow backflush in the sewer pipeline, the downstream floating ball can also withstand the backflush air pressure for odor isolation and sealing. When the lower part of the enlarged diameter head pipe is laterally connected with the downstream pipe, it is more beneficial for the downstream float to float upward under the action of buoyancy when the water comes. It has the advantages of two-way floating ball sealing at both the upstream and downstream of the water seal, being beneficial to maintaining the water seal for a long time, preventing the air flow backflush in the sewer pipeline, and having a good odor isolation effect.

[0005] As an optimization, the downstream side wall of the enlarged diameter head pipe is extended and connected with the upper side wall of the upstream end of the downstream pipe, and the downstream side wall of the downstream end of the U-shaped water storage bend pipe is extended and connected with the lower side wall of the upstream end of the downstream pipe. This can provide a convenient condition for the downstream floating ball to float upward when the water level rises, and can also avoid blocking the upstream port of the downstream pipe when floating upward, providing convenient conditions for the further downward flow of the water, and can also ensure that it sinks back smoothly after the water level drops to close the downstream port of the U-shaped water storage bend pipe.

[0006] As an optimization, the expansion transition section between the downstream end of the U-shaped trap and the lower end of the expansion header is located between the upper and lower sidewall heights at the upstream end of the downpipe. This helps the downstream float rise away from the upstream end of the downpipe, improving flow performance. A preferred location is midway between the upper and lower sidewall heights. This further helps the downstream float rise away from the upstream end of the downpipe, improving flow performance.

[0007] As an optimization, the height of the expansion transition section between the upstream end of the U-shaped water trap and the lower end of the expansion pipe is higher than or equal to the height of the expansion transition section between the downstream end of the U-shaped water trap and the lower end of the expansion head pipe. This helps ensure that the water level at the end of the U-shaped water trap drops normally after underwater drainage, ensuring that the upstream float promptly seals the upstream end of the U-shaped water trap.

[0008] As an optimization, the expansion transition section is an oblique arc expansion transition section or an oblique line expansion transition section. Compared with the oblique line expansion transition section, the oblique arc expansion transition section has better sealing performance, and the oblique line expansion transition section is more conducive to the float to float in time when the water level rises.

[0009] As an optimization, the expanded diameter head pipe is equipped with a sealing inspection cap on the upper end of the expanded diameter head, which is convenient for production, installation and maintenance.

[0010] As an optimization, an annular flange is provided at the upper end of the expansion pipe, and a compression bottom ring cover is screwed on the outer periphery of the upper section of the expansion pipe. The upper section of the expansion pipe is fitted with sealing rings and gaskets from top to bottom between the annular flange and the compression bottom ring cover; the upstream vertical pipe section of the U-shaped water storage bay pipe is composed of two upper and lower sections connected by a flexible joint, which makes it convenient for the expansion pipe to pass downward through the urinal and sink drain when disconnected.

[0011] As an optimization, the downpipe is an elbow downpipe that extends horizontally and then turns downward and extends straight. In this way, it is convenient to extend the drainage pipe under the ground below.

[0012] As an optimization, the upstream end of the U-shaped water trap pipe is extended upward to the expanded pipe, and the downstream end of the U-shaped water trap pipe is extended upward to the expanded head pipe. The expanded head pipe and the extension area of the downstream end and the downstream end are laterally connected to the downpipe, or the lower part of the expanded head pipe is laterally connected to the downpipe. The expanded pipe has an internal upstream float with a diameter larger than the diameter of the upstream end of the U-shaped water trap pipe, and the expanded head pipe has an internal downstream float with a diameter larger than the diameter of the downstream end of the U-shaped water trap pipe and the diameter of the upstream end of the downpipe. The float diameter is significantly smaller than the inner diameter of the expanded pipe and the expanded head pipe. That is, there is sufficient clearance between the float, the expanded pipe, and the expanded head pipe for water flow to pass through. The upstream end of the U-shaped water trap pipe is higher than the upstream end of the downpipe. This ensures that the upstream float promptly seals the upstream port of the U-shaped water trap pipe after underwater discharge, which helps prevent water seal odor from returning upward. The upper end of the expanded head pipe is screwed with a sealing inspection cap. This facilitates manufacturing, installation, and maintenance.

[0013] The upper end of the diameter-expanded pipe is provided with an annular flange for the lower mating sealing ring. The outer periphery of the upper section of the diameter-expanded pipe is screwed with a pressing bottom ring cover provided with a washer. The upstream vertical pipe section of the U-shaped water storage bend pipe is composed of two sections connected by a union joint. The diameter-expanded pipe penetrates into the lower discharge port of the urinal equipped with a guiding filter cap. The sealing ring and the annular flange are embedded in the upper annular groove of the lower discharge port of the urinal. The washer and the pressing bottom ring cover are fastened below the lower discharge port of the urinal, so that it is convenient for the diameter-expanded pipe to pass downward through the urinal and the washbasin drain outlet when disconnected. In this way, after water enters the diameter-expanded pipe, the upstream float ball in the diameter-expanded pipe will float due to the inflow of water, and the water further enters the U-shaped water storage bend pipe, which will also float the downstream float ball in the diameter-expanded head pipe, thus unblocking the downstream channel. After the water is discharged, the downstream float ball will sink due to the lower discharge pipe being lower than the upstream end of the U-shaped water storage bend pipe and losing the buoyancy support, blocking the upstream end of the U-shaped water storage bend pipe, automatically forming a float ball seal, and playing a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the upstream end. Although there will be water storage at the downstream end of the U-shaped water storage bend pipe connected to the discharge pipe, as the water at the unclosed downstream end evaporates into the sewer, when the water level sinks to a certain extent due to evaporation, the downstream float ball will also close the open part at the downstream end of the U-shaped water storage bend pipe due to losing buoyancy support, playing a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the downstream end; thus forming a double-sided float ball seal at the upstream and downstream ends of the U-shaped water storage bend pipe to prevent the evaporation and loss of water seal water. In particular, when there is an air flow backwash in the sewer pipeline, the downstream float ball can also withstand the backwash air pressure for odor isolation and sealing; when the lower part of the diameter-expanded head pipe is laterally connected to the discharge pipe, it is more conducive to the downstream float being buoyed up by the buoyancy when water comes. It has the advantages of double-sided float ball sealing at the upstream and downstream of the water seal, being conducive to maintaining the water seal for a long time, preventing the air flow backwash in the sewer pipeline, and having a good odor isolation effect.

[0014] As an optimization, the upstream end of the U-shaped water storage bend pipe extends upward to connect with the diameter-expanded pipe, and the downstream end of the U-shaped water storage bend pipe extends upward to connect with the diameter-expanded head pipe. The connection area between the diameter-expanded head pipe and the downstream end and the downstream end are laterally connected to the discharge pipe together, or the lower part of the diameter-expanded head pipe is laterally connected to the discharge pipe. The upstream float ball with a diameter larger than the diameter of the upstream end of the U-shaped water storage bend pipe is arranged inside the diameter-expanded pipe, and the downstream float ball with a diameter larger than the diameter of the downstream end of the U-shaped water storage bend pipe and the upstream end of the discharge pipe is arranged inside the diameter-expanded head pipe. The diameter of the float ball is significantly smaller than the inner diameters of the diameter-expanded pipe and the diameter-expanded head pipe, that is, there is enough clearance space for the water flow to pass between the float ball and the diameter-expanded pipe and the diameter-expanded head pipe. The upstream end of the U-shaped water storage bend pipe is higher than the upstream end of the discharge pipe, so as to ensure that the upstream float ball can close the upstream port of the U-shaped water storage bend pipe in time after the water is discharged, which is conducive to avoiding the upward return of the water seal odor; a sealing inspection cap is screwed on the upper end of the diameter-expanded head pipe. It is convenient for manufacturing, installation and maintenance.

[0015] The upper end of the expanded-diameter pipe is provided with an annular flange for fitting a lower sealing ring, and the outer circumference of the upper section of the expanded-diameter pipe is screwed with a pressing bottom ring cover with a washer; the upstream vertical pipe section of the U-shaped water trap pipe is composed of two sections connected by a union joint; the expanded-diameter pipe penetrates into the lower drain opening of the washbasin with an inner-fitted filter bucket, the sealing ring and the annular flange are embedded in the upper annular groove of the lower drain opening of the washbasin, and the washer and the pressing bottom ring cover are fastened below the lower drain opening of the washbasin, so that it is convenient for the expanded-diameter pipe to pass downward through the urinal and the drain opening of the washbasin when disconnected. In this way, after water enters the expanded-diameter pipe, the upstream float ball in the expanded-diameter pipe will float due to the inflow of water, and when water further enters the U-shaped water trap pipe, the downstream float ball in the expanded-diameter head pipe will also be floated, thus unblocking the downstream channel. After the water is drained, the downstream float ball will sink due to the downstream end of the drain pipe being lower than the upstream end of the U-shaped water trap pipe and losing the buoyancy support, blocking the upstream end of the U-shaped water trap pipe, automatically forming a float ball seal, and playing a role in preventing the seal water in the U-shaped water trap pipe from evaporating and losing from the upstream end. Although there will be water stored at the downstream end of the U-shaped water trap pipe connected to the drain pipe, however, as the water at the unclosed downstream end evaporates into the sewer, when the water level sinks to a certain extent due to evaporation, the downstream float ball will also close the open part at the downstream end of the U-shaped water trap pipe due to losing buoyancy support, playing a role in preventing the seal water in the U-shaped water trap pipe from evaporating and losing from the downstream end; thus forming a two-way float ball seal at the upstream and downstream ends of the U-shaped water trap pipe to prevent the evaporation and loss of the seal water. Especially, when there is an air backflow in the sewer pipeline, the downstream float ball can also withstand the backflow air pressure for odor isolation and sealing; when the lower part of the expanded-diameter head pipe is laterally connected to the drain pipe, it is more conducive to the downstream float being floated by the buoyancy when water comes. It has the advantages of two-way float ball sealing at the upstream and downstream of the water seal, being beneficial to maintaining the water seal for a long time and preventing the air flow in the sewer pipeline from backflowing, and having a good odor isolation effect.

[0016] In summary, the upstream float ball of the present invention mainly plays a role in preventing dryness, and the downstream float ball mainly plays a role in preventing backflow. That is, when the air pressure in the sewer pipeline is unstable, the downstream float ball closes the downstream drain port of the U-shaped water trap pipe to prevent the upward-returning air from damaging the water seal and preventing backflow of odor. It can be used for urinals, washbasins, and more can be used for floor drains.

[0017] After adopting the above technical solution, the dryness-preventing water seal device for the drain opening of the present invention, its urinal and washbasin have the advantages of two-way float ball sealing at the upstream and downstream of the water seal, being beneficial to maintaining the water seal for a long time and preventing the air flow in the sewer pipeline from backflowing, and having a good odor isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic side view structural diagram of the first embodiment of the dryness-preventing water seal device for the drain opening of the present invention. Figure 2 It is a schematic side view structural diagram of the second embodiment of the dryness-preventing water seal device for the drain opening of the present invention. Figure 3 It is a schematic side view structural diagram of the third embodiment of the dryness-preventing water seal device for the drain opening of the present invention. Figure 4It is a schematic side view structure diagram of the fourth embodiment of the water seal device for preventing dryness at the water outlet of the utility model. Figure 5 It is a schematic side view structure diagram of a urinal equipped with the water seal device for preventing dryness at the water outlet of the utility model. Figure 6 It is a schematic side view structure diagram of a washbasin equipped with the water seal device for preventing dryness at the water outlet of the utility model. Specific embodiments

[0019] Example 1, as Figure 1 shown, for the water seal device for preventing dryness at the water outlet of the utility model, the upstream end of the U-shaped water storage bend pipe 1 is extended upward to connect with an enlarged diameter pipe 2, and the downstream end of the U-shaped water storage bend pipe 1 is extended upward to connect with an enlarged diameter head pipe 3. The enlarged diameter head pipe 3 is laterally connected to the downstream discharge pipe 4 together with the extension area of the downstream end and the downstream end. It can also be that the lower part of the enlarged diameter head pipe is laterally connected to the discharge pipe. An upstream floating ball 51 with a diameter larger than the diameter of the upstream end of the U-shaped water storage bend pipe 1 is arranged inside the enlarged diameter pipe 2, and a downstream floating ball 52 with a diameter larger than the diameter of the downstream end of the U-shaped water storage bend pipe 1 and the upstream end diameter of the downstream discharge pipe 4 is arranged inside the enlarged diameter head pipe 3. The diameter of the floating ball is significantly smaller than the inner diameters of the enlarged diameter pipe 2 and the enlarged diameter head pipe 3, that is, there is enough clearance space for the water flow to pass through between the floating ball and the enlarged diameter pipe and the enlarged diameter head pipe. The upstream end of the U-shaped water storage bend pipe 1 is higher than the upstream end of the downstream discharge pipe 4, so as to ensure that the upstream floating ball can timely close the upstream port of the U-shaped water storage bend pipe after the water is discharged downstream, which is beneficial to avoiding the upward return of the water seal odor. In this way, after the water enters the enlarged diameter pipe, the upstream floating ball inside the enlarged diameter pipe will float up due to the inflow of water, and the water further enters the U-shaped water storage bend pipe, which will also float up the downstream floating ball inside the enlarged diameter head pipe, thus unblocking the downstream discharge channel. After the water is discharged downstream, the downstream floating ball will sink due to the downstream discharge pipe being lower than the upstream end of the U-shaped water storage bend pipe and losing the buoyancy support, blocking the upstream end of the U-shaped water storage bend pipe and automatically forming a floating ball seal, playing a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the upstream end. Although there will be water stored at the downstream end of the U-shaped water storage bend pipe connected to the downstream discharge pipe, however, as the water at the unclosed downstream end evaporates into the sewer, when the water level sinks to a certain extent due to evaporation, the downstream floating ball will also close the open part of the downstream end of the U-shaped water storage bend pipe due to losing the buoyancy support, playing a role in preventing the water seal water in the U-shaped water storage bend pipe from evaporating and losing from the downstream end; thus forming the function of preventing the evaporation and loss of the water seal water by the two-way floating ball sealing at the upstream and downstream ends of the U-shaped water storage bend pipe. Especially, when there is an air flow backflush in the sewer pipeline, the downstream floating ball can also bear the backflush air pressure for odor isolation and sealing; when the lower part of the enlarged diameter head pipe is laterally connected to the downstream discharge pipe, it is more beneficial for the downstream float to float up under the buoyancy when the water comes. It has the advantages of two-way floating ball sealing at the upstream and downstream of the water seal, being beneficial to maintaining the water seal for a long time, preventing the air flow backflush of the sewer pipeline, and having a good odor isolation effect.

[0020] Specifically, the downstream side wall of the expanded-diameter head pipe 3 is connected to the upper side wall at the upstream end of the lower row of pipes 4, and the downstream side wall at the downstream end of the U-shaped water seal bend pipe 1 is connected to the lower side wall at the upstream end of the lower row of pipes 4. More specifically, the expanded-diameter transition section at the lower end of the downstream end of the U-shaped water seal bend pipe 1 and the lower end of the expanded-diameter head pipe 3 is located in the area between the height of the upper side wall and the height of the lower side wall at the upstream end of the lower row of pipes 4. Preferably, it is in the middle area between the height of the upper side wall and the height of the lower side wall.

[0021] Specifically, the height of the expanded-diameter transition section at the upstream end of the U-shaped water seal bend pipe 1 and the lower end of the expanded-diameter pipe 2 is higher than or equal to the height of the expanded-diameter transition section at the downstream end of the U-shaped water seal bend pipe 1 and the lower end of the expanded-diameter head pipe 3. More specifically, the expanded-diameter transition section is an inclined arc expanded-diameter transition section or a slant line expanded-diameter transition section.

[0022] Embodiment 2, as Figure 2 shown, the difference between the anti-drying water seal device for the water outlet of the present utility model and the above Embodiment 1 is that the expanded-diameter head pipe 3 is a sealing inspection cap 31 screwed and matched at the upper end of the expanded-diameter pipe head.

[0023] Embodiment 3, as Figure 3 shown, the difference between the anti-drying water seal device for the water outlet of the present utility model and the above Embodiment 2 is that an annular flange 20 is provided at the upper end of the expanded-diameter pipe 2, a pressing bottom ring cover 23 is screwed and matched on the outer periphery of the upper section of the expanded-diameter pipe 2, and a sealing ring 21 and a washer 22 are sleeved and matched in sequence from top to bottom between the annular flange 20 and the pressing bottom ring cover 23 of the upper section of the expanded-diameter pipe 2; the upstream vertical pipe section of the U-shaped water seal bend pipe 1 is composed of two upper and lower sections connected by a union 11.

[0024] Embodiment 4, as Figure 4 shown, the difference between the anti-drying water seal device for the water outlet of the present utility model and the above Embodiment 3 is that the lower row of pipes 4 is an elbow downward extension pipe that extends horizontally and then turns downward.

[0025] As Figure 5 shown, the urinal equipped with the anti-drying water seal device for the water outlet of the present utility model is that the upstream end of the U-shaped water seal bend pipe 1 extends upward to connect to the expanded-diameter pipe 2, the downstream end of the U-shaped water seal bend pipe 1 extends upward to connect to the expanded-diameter head pipe 3, the connection area between the expanded-diameter head pipe 3 and the downstream end and the downstream end jointly communicate laterally with the lower row of pipes 4, or it can also be that the lower part of the expanded-diameter head pipe communicates laterally with the lower row of pipes. The upstream float ball 51 with a diameter larger than the diameter of the upstream end of the U-shaped water seal bend pipe 1 is arranged inside the expanded-diameter pipe 2, and the downstream float ball 52 with a diameter larger than the diameter of the downstream end of the U-shaped water seal bend pipe 1 and the diameter of the upstream end of the lower row of pipes 4 is arranged inside the expanded-diameter head pipe 3. The diameter of the float ball is significantly smaller than the inner diameters of the expanded-diameter pipe 2 and the expanded-diameter head pipe 3, that is, there is enough clearance space for the water flow to pass between the float ball and the expanded-diameter pipe and the expanded-diameter head pipe. The upstream end of the U-shaped water seal bend pipe 1 is higher than the upstream end of the lower row of pipes 4, so as to ensure that the upstream float ball can timely seal the upstream port of the U-shaped water seal bend pipe after the water is discharged, which is beneficial to avoiding the upward return of the water seal odor; a sealing inspection cap 31 is screwed and matched at the upper end of the expanded-diameter head pipe 3.

[0026] The upper end of the expanded tube 2 is provided with an annular blue plate 20 with a lower sealing ring 21. The outer periphery of the expanded tube 2 is screwed with a gasket 22 on the upper section of the expanded tube 2 to tighten the bottom ring cover 23. The upstream vertical pipe section of the U-shaped water trap tube 1 is a flexible joint 11 connecting the upper and lower sections; the expanded tube 2 is inserted into the lower discharge port of the urinal 7 with a guide filter cap 6. The upper annular groove of the lower discharge port of the urinal 7 is embedded with the sealing ring 21 and the annular blue plate 20. The gasket 22 and the compression bottom ring cover 23 are fastened below the lower discharge port of the urinal 7.

[0027] like Figure 6 As shown, the utility model of the anti-drying water seal device for the sewer outlet is equipped with a wash basin. The upstream end of the U-shaped water storage bay pipe 1 is extended upwardly to the expansion pipe 2, and the downstream end of the U-shaped water storage bay pipe 1 is extended upwardly to the expansion head pipe 3. The expansion head pipe 3 and the extension area of the downstream end and the downstream end are jointly connected to the downpipe 4 laterally. It can also be that the lower part of the expansion head pipe is laterally connected to the downpipe. The expansion pipe 2 has an upstream float 51 with a built-in diameter larger than the diameter of the upstream end of the U-shaped water storage bay pipe 1, and the expansion head pipe 3 has a built-in diameter larger than The diameter of the downstream end of the U-shaped water trap pipe 1 and the diameter of the upstream end of the lower discharge pipe 4 are both smaller than the inner diameters of the expanded pipe 2 and the expanded head pipe 3. That is, there is enough clearance between the float, the expanded pipe and the expanded head pipe for water to flow through. The upstream end of the U-shaped water trap pipe 1 is higher than the upstream end of the lower discharge pipe 4. This ensures that the upstream float closes the upstream port of the U-shaped water trap pipe in time after the water is discharged, which helps to prevent the water seal odor from returning upward. The upper end of the expanded head pipe 3 is screwed with a sealing inspection cap 31.

[0028] The upper end of the expanded tube 2 is equipped with an annular flange 20 with a sealing ring 21 below. A compression bottom ring cover 23 with a gasket 22 is screwed onto the outer periphery of the upper section of the expanded tube 2. The upstream vertical pipe section of the U-shaped water trap 1 is composed of two upper and lower sections connected by a flexible joint 11. The expanded tube 2 passes through the lower outlet of the wash basin 9, which is equipped with a filter barrel 8. The sealing ring 21 and annular flange 20 are embedded in the annular groove above the lower outlet of the wash basin 9. The gasket 22 and compression bottom ring cover 23 are fastened to the lower side of the lower outlet of the wash basin 9. The lower outlet of the wash basin 9 is a downward-extending elbow pipe that extends horizontally and then turns downward to extend straight.

[0029] In short, the utility model of the anti-drying water seal device for the sewer outlet and its urinal and wash basin have the advantages of upstream and downstream two-way floating ball sealing of the water seal, which is conducive to maintaining the water seal for a long time and preventing the backflow of air in the sewer pipe, and has a good odor isolation effect.

Claims

1. A drain outlet anti-drying water seal device, characterized in that The upstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter pipe, and the downstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter head pipe. The connection area between the enlarged-diameter head pipe and the downstream end and the downstream end jointly communicate laterally with the lower drain pipe, or the lower part of the enlarged-diameter head pipe communicates laterally with the lower drain pipe. An upstream float with a diameter larger than the diameter of the upstream end of the U-shaped water seal pipe is installed inside the enlarged-diameter pipe, and a downstream float with a diameter larger than the diameter of the downstream end of the U-shaped water seal pipe and the upstream end diameter of the lower drain pipe is installed inside the enlarged-diameter head pipe. The diameter of the float is significantly smaller than the inner diameters of the enlarged-diameter pipe and the enlarged-diameter head pipe, and the upstream end of the U-shaped water seal pipe is higher than the upstream end of the lower drain pipe.

2. The water seal device for preventing the dryness of the water outlet according to claim 1, wherein The downstream side wall of the enlarged-diameter head pipe is connected to the upper side wall of the upstream end of the lower drain pipe, and the downstream side wall of the downstream end of the U-shaped water seal pipe is connected to the lower side wall of the upstream end of the lower drain pipe.

3. The water seal device for preventing the drain outlet from drying up according to claim 2, characterized in that The enlarged-diameter transition section between the downstream end of the U-shaped water seal pipe and the lower end of the enlarged-diameter head pipe is located in the area between the upper side wall height and the lower side wall height of the upstream end of the lower drain pipe.

4. The drain outlet anti-drying water seal device according to claim 1, wherein The height of the enlarged-diameter transition section between the upstream end of the U-shaped water seal pipe and the lower end of the enlarged-diameter pipe is higher than or equal to the height of the enlarged-diameter transition section between the downstream end of the U-shaped water seal pipe and the lower end of the enlarged-diameter head pipe.

5. The drain outlet anti-drying water seal device according to claim 4, characterized in that The enlarged-diameter transition section is an inclined arc enlarged-diameter transition section or a slant line enlarged-diameter transition section.

6. The drain outlet anti-drying water seal device according to claim 1, characterized in that The enlarged-diameter head pipe is a sealing inspection cap screwed on the upper end of the enlarged-diameter pipe head.

7. The water seal device for preventing the drain opening from drying up according to claim 1, characterized in that An annular flange is provided at the upper end of the enlarged-diameter pipe. A pressing bottom ring cover with a gasket screwed on the outer periphery of the upper section of the enlarged-diameter pipe. A sealing ring and a washer are sequentially sleeved between the annular flange and the pressing bottom ring cover from top to bottom on the upper section of the enlarged-diameter pipe. The upstream vertical pipe section of the U-shaped water seal pipe is composed of two sections connected by a union joint.

8. The water seal device for preventing the drain opening from drying up according to claim 1, characterized in that The lower drain pipe is an elbow down-extension pipe that extends horizontally and then turns downward and extends straight.

9. The urinal configured with the water seal device for preventing the drain opening from drying up according to claim 1, characterized in that The upstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter pipe, and the downstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter head pipe. The connection area between the enlarged-diameter head pipe and the downstream end and the downstream end jointly communicate laterally with the lower drain pipe, or the lower part of the enlarged-diameter head pipe communicates laterally with the lower drain pipe. An upstream float with a diameter larger than the diameter of the upstream end of the U-shaped water seal pipe is installed inside the enlarged-diameter pipe, and a downstream float with a diameter larger than the diameter of the downstream end of the U-shaped water seal pipe and the upstream end diameter of the lower drain pipe is installed inside the enlarged-diameter head pipe. The diameter of the float is significantly smaller than the inner diameters of the enlarged-diameter pipe and the enlarged-diameter head pipe, and the upstream end of the U-shaped water seal pipe is higher than the upstream end of the lower drain pipe; a sealing inspection cap is screwed on the upper end of the enlarged-diameter head pipe; An annular flange with a lower-matched sealing ring is provided at the upper end of the enlarged-diameter pipe. A pressing bottom ring cover with an upper-set gasket is screwed on the outer periphery of the upper section of the enlarged-diameter pipe. The upstream vertical pipe section of the U-shaped water seal pipe is composed of two sections connected by a union joint; the enlarged-diameter pipe penetrates into the lower drain port of the urinal with an upper-matched guiding filter cap. The sealing ring and the annular flange are embedded in the upper annular groove of the lower drain port of the urinal, and the gasket and the pressing bottom ring cover are fastened below the lower drain port of the urinal.

10. The washbasin used in combination with the water seal device for preventing the drain opening from drying up according to claim 1, characterized in that The upstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter pipe, and the downstream end of the U-shaped water seal pipe extends upward to connect with an enlarged-diameter head pipe. The enlarged-diameter head pipe and the extension area of the downstream end and the downstream end are laterally connected to the lower drain pipe together, or the lower part of the enlarged-diameter head pipe is laterally connected to the lower drain pipe. An upstream floating ball with a diameter larger than the diameter of the upstream end of the U-shaped water seal pipe is arranged inside the enlarged-diameter pipe, and a downstream floating ball with a diameter larger than the diameter of the downstream end of the U-shaped water seal pipe and the upstream end diameter of the lower drain pipe is arranged inside the enlarged-diameter head pipe. The diameter of the floating ball is significantly smaller than the inner diameters of the enlarged-diameter pipe and the enlarged-diameter head pipe. The upstream end of the U-shaped water seal pipe is higher than the upstream end of the lower drain pipe; a sealed inspection cap is screwed on the upper end of the enlarged-diameter head pipe; An annular flange with a lower mating sealing ring is provided at the upper end of the enlarged-diameter pipe, and a pressing bottom ring cover with a washer screwed on the outer periphery of the upper section of the enlarged-diameter pipe; the upstream vertical pipe section of the U-shaped water seal pipe is connected by a union in two upper and lower sections; the enlarged-diameter pipe penetrates into the lower drain port of the washbasin with an inner-filtering bucket, and the sealing ring and the annular flange are embedded in the upper annular groove of the lower drain port of the washbasin, and the washer and the pressing bottom ring cover are fastened below the lower drain port of the washbasin.

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