A flush toilet pipe

Abstract

The present invention belongs to the technical field of flush toilets and specifically discloses a flush toilet pipe. The upper end of the flush toilet pipe has an S-shaped curve, the inlet end extends to the water surface, and the outlet end extends to a horizontal position to connect to an external pipeline. The cross-sectional area of ​​the flush toilet pipe gradually decreases from the inlet end to the outlet end. This flush toilet pipe not only reduces the amount of water stored in the pipe but also accelerates the flow of flush water through the pipe, achieving a high dilution rate and significantly improving the sewage displacement capacity.

Description

Technical Field

[0001] The invention belongs to the technical field of flush toilets, and in particular relates to a flush toilet pipeline. Background Art

[0002] In the existing flush toilet, water is usually discharged through a large water gate hole at the rear to form a downward pressure on the water cover, and the flow of flushing water along the pipeline is used for sewage treatment.

[0003] However, if Figure 1 As shown, the pipe 10 used in the existing flush toilet is usually a U-shaped pipe. This pipe is easy to process, but its size is large, and the water storage capacity in the pipe is large, generally more than 1.2L, or even up to 1.5L or 1.6L. This will make the sewage discharge performance of the pipe poor and the dilution rate low, usually only reaching 25 times the standard dilution rate in the national standard GB6952-2015. Summary of the Invention

[0004] In view of the above problems, the present invention discloses a flush toilet pipe to overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A flush toilet pipe has an upper end curve of an S-shaped structure, an inlet end of the flush toilet pipe extends to a water surface cover, an outlet end of the flush toilet pipe extends to a horizontal state and is connected to an external pipeline, and the cross-sectional area of ​​the flush toilet pipe gradually decreases from the inlet end to the outlet end.

[0007] Preferably, the inlet end of the flush toilet pipe is provided with an inclined step surface, which is located below the water cover and has an angle of 20 to 40 degrees with the horizontal plane.

[0008] Preferably, the height between the tail end of the inclined step surface and the water surface cover is 25 to 35 mm.

[0009] Preferably, the ratio of the tail end cross-sectional area of ​​the inclined step surface in the flush toilet pipe to the outlet end cross-sectional area of ​​the flush toilet pipe is 1.7:1 to 1.4:1.

[0010] Preferably, the diameter of the end of the flush toilet pipe is 60 to 70 mm.

[0011] Preferably, the upstream position of the water trap in the flush toilet pipe is a downhill section, and the angle between the downhill section and the horizontal plane is in the range of 50 to 65 degrees.

[0012] Preferably, the downstream position of the water trap in the flush toilet pipe is a sewage discharge section, and the angle between the sewage discharge section and the horizontal plane ranges from 40 to 55 degrees.

[0013] Preferably, the lowest position in the upper end curve of the flush toilet pipe is the first straight line segment.

[0014] Preferably, the highest position in the upper end curve of the flush toilet pipe is the second straight line segment, and the length of the straight line segment is 15 to 30 mm.

[0015] Preferably, the tail end of the flush toilet pipe is further provided with a large straight section for connecting to an external pipe.

[0016] Compared with the U-shaped pipe used in existing flush toilets, the flush toilet pipe of the present invention is an S-shaped pipe with a gradually decreasing cross-sectional area from the inlet end to the outlet end. This not only reduces the amount of water stored in the pipe, but also accelerates the flushing water flowing through the pipe, thereby greatly increasing the dilution rate, obtaining a higher sewage replacement capacity, and improving the sewage discharge capacity of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of an existing flush toilet pipe;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the flush toilet pipe in this embodiment;

[0020] Figure 3 This is a schematic diagram of the external structure of the flush toilet pipe in this embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the inlet end of the flush toilet pipe of this embodiment from a top view;

[0022] Figure 5 This is a comparison chart of the dye solution and the 50-fold standard solution when performing a half-flush dilution rate test on the toilet pipe in this embodiment;

[0023] Figure 6 This is a comparison chart of the dye solution and the 100-fold standard solution when performing a half-flush dilution rate test on the toilet pipe in this embodiment;

[0024] Figure 7This is a comparison chart of the dye solution and the 200-fold standard solution when the dilution rate is tested under full flushing of the toilet pipe in this embodiment;

[0025] Figure 8 This is a comparison chart of the dye solution and the 300-fold standard solution when the dilution rate is tested under full flushing of the toilet pipe in this embodiment. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The technical solution provided by this embodiment is described in detail below with reference to the accompanying drawings.

[0028] Combine Figures 2 to 4 As shown, this embodiment discloses a flush toilet pipe, the upper end curve 21 of the flush toilet pipe 20 is an S-shaped structure, the inlet end 22 extends to the water surface cover 30, the outlet end 23 extends to a horizontal state and is connected to an external pipeline, and the cross-sectional area of ​​the flush toilet pipe 20 gradually decreases from the inlet end 22 to the outlet end 23.

[0029] Compared with the U-shaped pipe used in existing flush toilets, the S-shaped pipe disclosed in this embodiment, which gradually reduces the cross-sectional area from the inlet end to the outlet end, can not only reduce the amount of water stored in the pipe, but also accelerate the flushing water flowing through the pipe, thereby greatly increasing the dilution rate multiples, obtaining a higher sewage replacement capacity, and improving the sewage discharge capacity of the pipe.

[0030] Combine Figure 2 As shown, in this embodiment, an oblique step surface 24 is provided at the inlet end 22 of the flush toilet pipe. The oblique step surface 24 is located below the water surface cover 30 and the angle α between the oblique step surface 24 and the horizontal plane is 20 to 40 degrees.

[0031] In this embodiment, by providing an inclined step surface below the water surface cover at the inlet end of the flush toilet pipe, the pipe below the water surface cover can be narrowed by utilizing the inclined step surface while ensuring that the area of ​​the water surface cover remains unchanged, thereby reducing the amount of water stored in the downstream flush toilet pipe. At the same time, by designing the inclined step surface to have an angle of 20 to 40 degrees with the horizontal plane, the dirt falling on the inclined step surface can be guided to slide down quickly, thereby ensuring the flushing and drainage effect of the dirt.

[0032] Furthermore, in the flush toilet pipe of this embodiment, the height dimension H between the tail end of the inclined step surface 24 and the water seal surface 30 is controlled to be 25-35 mm. This ensures that the water seal effectively covers the dirt that falls on the inclined step surface, improving environmental protection and user experience.

[0033] Furthermore, in the flush toilet pipe of this embodiment, the ratio of the tail end cross-sectional area S1 of the oblique stepped surface 24 to the outlet cross-sectional area S7 of the flush toilet pipe is 1.7:1 to 1.4:1. By designing the cross-sectional area of ​​the pipe at both ends, after the oblique stepped surface has been reduced in diameter, to a gradual change of 1.7:1 to 1.4:1, this accelerates flush water flowing through this area while reducing the resistance to water flow caused by the change in pipe cross-sectional area. Ultimately, the flush water quickly flushes waste through the trap and into the horizontal outlet, where it is then smoothly discharged into the external pipe, thus ensuring the flush toilet pipe's drainage capacity.

[0034] Furthermore, in this embodiment, the diameter of the outlet end 23 at the smallest diameter position in the flush toilet pipe is controlled to be 60-70 mm, thereby ensuring that the pipe can meet the minimum sewage discharge requirement.

[0035] In addition, combined Figure 2 As shown, in the flush toilet pipe of this embodiment, the upstream position of the trap 25 is a downslope section 26, and the angle between the downslope section 26 and the horizontal plane is controlled to be 50-65 degrees. This creates a smooth transition between the inclined step surface and the trap, reducing the resistance of waste and flush water entering the trap from the water surface, increasing the speed of flush water entering the trap, and improving sewage drainage capacity.

[0036] Combine Figure 2 As shown, in the flush toilet pipe of this embodiment, the downstream portion of the trap 25 forms a sewage section 27, and the angle between the sewage section 27 and the horizontal plane is controlled to be 40-55 degrees. This ensures a smoother flow between the trap and the outlet, reducing the resistance of waste and flush water entering the outlet through the trap, allowing more flush water to enter the outlet through the trap, thereby improving sewage drainage capacity.

[0037] In addition, combined Figure 1 As shown, in the flush toilet pipe of this embodiment, the two ends of the upper curve 21 are straight segments. Specifically, the lowest position is the first straight segment 28 and is located at the trap 25, and the highest position is the second straight segment 29 and is located at the outlet end 23.

[0038] The length of the first straight segment 28 is approximately 5-10 mm. This not only facilitates mold preparation but also, compared to the curved design used in existing flush toilet pipes at this location, the straight segment design of this embodiment has higher dimensional accuracy, allowing for more precise control of the height position of the water cover, thereby accurately controlling the flush toilet pipe to a minimum water volume. The length of the second straight segment 29 is approximately 15-30 mm. This effectively horizontally guides waste and flush water flowing to the outlet, allowing them to more easily enter the external pipe and ensure effective drainage of waste and flush water.

[0039] Combine Figure 2 and Figure 3 As shown, the flush toilet pipe of this embodiment is further provided with a large straight section 40 at the outlet end 23 for connecting to an external pipe. The large straight section 40 has a diameter of 102 mm and a length greater than 40 mm, thereby ensuring smooth connection between the flush toilet pipe and the external pipe, ensuring normal operation of the flush toilet.

[0040] Next, according to the dilution rate test method in the national standard GB 6952-2015, a dilution rate test was performed on the flush toilet pipe prepared according to this embodiment.

[0041] Combine Figure 2 、 Figures 5 to 8 As shown, a dual-flush flush toilet (hereinafter referred to as the "test toilet") having a flush toilet pipe according to the above-mentioned dimensional requirements was prepared. The angle of the inclined step surface 24 was approximately 30°, the angle of the downslope section was controlled within a range of 50-65°, and the angle of the sewage section was controlled within a range of 40-55°. The water storage capacity was approximately 1.0 L. The cross-sectional area variation between the end of the inclined step surface 24 and the outlet end 23 in the flush toilet pipe was as follows:

[0042] <![CDATA[S1 / mm 2 ]]> <![CDATA[S2 / mm 2 ]]> <![CDATA[S3 / mm 2 ]]> <![CDATA[S4 / mm 2 ]]> <![CDATA[S5 / mm 2 ]]> <![CDATA[S6 / mm 2 ]]> <![CDATA[S7 / mm 2 ]]> 4649.48 4470.26 4247.14 3546.69 3232.9 3188.72 3052.95

[0043] According to the dilution rate test method specified in the national standard GB 6952-2015, a dilution rate test was performed on the test toilet under half flushing.

[0044] The first step is to prepare a methylene blue solution with a concentration of 5g / L using tap water at about 80°C; the second step is to flush the test toilet several times. After the test toilet completes the normal water inlet cycle, pour 30mL of dye solution into the water seal of the test toilet and stir evenly; the third step is to take out two 5mL solutions from the water seal as standard solutions and put them into the No. 1 and No. 2 measuring cylinders respectively; the fourth step is to start the test toilet for a half-flush. After the flush cycle is completed, the dye solution in the test toilet is taken out and placed into the No. 3 measuring cylinder; the fifth step is to add water to the No. 1 measuring cylinder to dilute it to 250mL (corresponding to a standard dilution rate of 50 times) and mark it as "half-flush 50 times standard solution". Compare the color of the dye solution in the No. 3 measuring cylinder to obtain Figure 5 As shown in the comparison chart; add water to the No. 2 graduated cylinder to dilute to 500mL (corresponding to the standard dilution rate of 100 times) marked as "half row 100 times standard solution", compare the color of the dye solution in the No. 3 graduated cylinder, and obtain Figure 6 The comparison chart shown.

[0045] according to Figure 5 and Figure 6 As shown, compared with the color of the standard liquid with a dilution rate of 50 times and the color of the standard liquid with a dilution rate of 100 times, the color of the dyeing liquid obtained by half-flushing the test toilet is lighter, that is, the dilution rate of the test toilet reaches an effect of not less than 100 times, which is far higher than the standard requirement of not less than 25 times dilution rate, that is, the flushing toilet pipe of this embodiment achieves an excellent sewage replacement effect and has a stronger sewage discharge capacity.

[0046] According to the dilution rate test method specified in the national standard GB 6952-2015, a dilution rate test was performed on the test toilet under full flushing.

[0047] Compared with the dilution rate test under half flushing mentioned above, the first and second steps remain unchanged. In the third step, two 5mL solutions are taken from the water seal as standard solutions and placed in the No. 4 and No. 5 measuring cylinders respectively; in the fourth step, the test toilet is started for a full flush. After the flush cycle is completed, the dye solution in the test toilet is taken out and placed in the No. 6 measuring cylinder; in the fifth step, water is added to the No. 4 measuring cylinder to dilute it to 1000mL (corresponding to a standard dilution rate of 200 times) and marked as "full flush 200 times standard solution". The color of the dye solution in the No. 6 measuring cylinder is compared to obtain Figure 7 Add water to the No. 5 graduated cylinder and dilute to 1500mL (corresponding to a standard dilution rate of 300 times) marked as "full row 300 times standard solution", compare the color of the dye solution in the No. 4 graduated cylinder, and obtain Figure 8 The comparison chart shown.

[0048] according to Figure 7 and Figure 8As shown, compared with the color of the standard liquid with a dilution rate of 200 times and the color of the standard liquid with a dilution rate of 300 times, the color of the dyeing liquid obtained by fully flushing the test toilet is lighter, that is, the dilution rate of the test toilet reaches an effect of not less than 300 times, which is far higher than the standard requirement of not less than 100 times dilution rate, that is, the flushing toilet pipe of this embodiment achieves an excellent sewage replacement effect and has a stronger sewage discharge capacity.

[0049] The above description is only a specific embodiment of the present invention. Under the above teachings of the present invention, those skilled in the art may make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above description is only to better explain the purpose of the present invention, and the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A flush toilet pipe, characterized in that: The upper end curve (21) of the flush toilet pipe (20) is an S-shaped structure, the inlet end (22) of the flush toilet pipe (20) extends to the water surface cover (30), the outlet end (23) of the flush toilet pipe (20) extends to a horizontal state and is connected to an external pipeline, and the cross-sectional area of ​​the flush toilet pipe (20) gradually decreases from the inlet end (22) to the outlet end (23); the inlet end (22) of the flush toilet pipe (20) is provided with an inclined step surface (24), the inclined step surface (24) is located below the water surface cover (30) and the angle between the inclined step surface and the horizontal plane is 20 to 40 degrees.

2. The flush toilet pipe according to claim 1, characterized in that: The height dimension of the tail end of the oblique step surface (24) from the water surface cover (30) is 25 to 35 mm.

3. The flush toilet pipe according to claim 1, characterized in that: The ratio of the tail end cross-sectional area S1 of the inclined step surface (24) in the flush toilet pipe (20) to the outlet end cross-sectional area S7 of the flush toilet pipe (20) is 1.7:1 to 1.4:

1.

4. The flush toilet pipe according to claim 3, characterized in that: The diameter of the outlet end (23) of the flush toilet pipe (20) is 60-70 mm.

5. The flush toilet pipe according to claim 1, characterized in that: The upstream position of the water trap (25) in the flush toilet pipe (20) is a downhill section (26), and the angle between the downhill section (26) and the horizontal plane ranges from 50 to 65 degrees.

6. The flush toilet pipe according to claim 5, characterized in that: The downstream position of the water trap (25) in the flush toilet pipe (20) is a sewage discharge section (27), and the angle between the sewage discharge section (27) and the horizontal plane ranges from 40 to 55 degrees.

7. The flush toilet pipe according to claim 1, characterized in that: In the upper curve (21) of the flush toilet pipe (20), the lowest position is the first straight line segment (28).

8. The flush toilet pipe according to claim 1, characterized in that: In the upper end curve (21) of the flush toilet pipe (20), the highest position is the second straight line segment (29), and the length of the second straight line segment (29) is 15 to 30 mm.

9. The flush toilet pipe according to claim 1, characterized in that: The outlet end of the flush toilet pipe (20) is also provided with a large straight section (40) for connecting to an external pipe.

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