A horizontal offset rotary pressure-balanced elbow for a drainage riser

Abstract

The present invention provides a horizontal offset rotary pressure-balanced elbow for a drainage riser, comprising: a horizontal water inlet end, a vertical water outlet end, and a top ventilation end. A tangential transition section for deflecting the water flow direction is provided at the rear end of the horizontal water inlet end; a tangential water inlet section tangent to the tangential transition section is provided at the rear end of the tangential transition section, and the bending radian of the tangential water inlet section is inconsistent with that of the tangential transition section; a tangential outer circle section is provided on the outer side of the tangential water inlet section; the tangential outer circle section and the top ventilation end are communicated with a vertical expansion section; the lower end of the vertical expansion section is provided as a conical transition section, and the lower end of the conical transition section is provided as the vertical water outlet end. The present invention solves the problem that when the drainage system drains water from an offset horizontal pipe to a drainage riser, a "water tongue" is formed in a large-radius 90-degree elbow to block the ventilation channel of the drainage riser, and at the same time realizes the pressure stabilization of the drainage system, ensuring that the drainage system will not have the problem of drainage system back odor.

Description

Technical Field

[0001] The present invention relates to the field of drainage pipe fittings, and particularly relates to a horizontal offset rotary pressure-equalizing elbow for a drainage riser. Background Art

[0002] In a building domestic drainage pipe system, when a horizontal offset occurs in the drainage system due to building structure or drainage system confluence, a large-radius 90-degree elbow is used for conversion connection between the drainage riser and the offset horizontal pipe. When the drainage system drains from the offset horizontal pipe to the drainage riser, due to the fast flow velocity of the water in the offset horizontal pipe, it will rush towards the outer wall of the elbow to form a "water tongue". The water flow carries a large amount of gas into the elbow, and the "water tongue" will block the ventilation channel of the drainage riser, resulting in the blockage and inability to discharge of the upper airflow of the offset horizontal pipe, the formation of positive pressure in the upper system, the inability of the lower airflow to drain downward, and the formation of negative pressure in the bottom system. The above phenomena will cause the water seal of the horizontal branch pipes in the upper and lower floors of the toilet to be damaged, resulting in the odor return in the toilet. Summary of the Invention

[0003] To solve the problem that a "water tongue" is formed in a large-radius 90-degree elbow to block the ventilation channel of the drainage riser when the drainage system drains from the offset horizontal pipe to the drainage riser in the prior art, the present invention provides a horizontal offset rotary pressure-equalizing elbow for a drainage riser.

[0004] The technical solution of the present invention is realized as follows:

[0005] A horizontal offset rotary pressure-equalizing elbow for a drainage riser includes a horizontal water inlet end, a vertical water outlet end, and a top ventilation end. A tangential transition section for deflecting the water flow direction is provided at the rear end of the horizontal water inlet end; a tangential water inlet section tangent to the tangential transition section is provided at the rear end of the tangential transition section, and the bending radian of the tangential water inlet section is inconsistent with that of the tangential transition section; a tangential outer circle section is provided on the outer side of the tangential water inlet section; the tangential outer circle section and the top ventilation end are communicated with a vertical expansion section; the lower end of the vertical expansion section is provided as a conical transition section, and the lower end of the conical transition section is provided as the vertical water outlet end.

[0006] Preferably, the bending radius from the horizontal water inlet end to the vertical expansion section is greater than or equal to 2 times the inner diameter of the horizontal water inlet end.

[0007] Preferably, the included angle range between the axis of the tangential transition section and the axis of the horizontal water inlet end is 10 degrees to 60 degrees; the radius of the tangential transition section is smaller than the radius of the tangential water inlet section.

[0008] Preferably, the outer side of the vertical expansion section away from the horizontal water inlet end is provided as an arc-shaped expansion guiding surface.

[0009] Preferably, the included angle range between the horizontal water inlet end and the vertical water outlet end is 80 degrees to 90 degrees.

[0010] Preferably, the tangential water inlet section and the junction are tangential water inlet inflection points, and the horizontal distance between the tangential water inlet inflection point and the central axis of the horizontal water inlet end is 0-15 mm.

[0011] Preferably, the horizontal water inlet end and the top ventilation end are integrally connected, and a connecting pipe is provided between the port of the horizontal water inlet end and the top side of the top ventilation end; or the horizontal water inlet end and the top ventilation end are detachably connected, and a connecting fitting is provided between the horizontal water inlet end and the top ventilation end.

[0012] Preferably, guide ribs are provided on the inner side of the conical transition section, and the guide ribs are inclined from top to bottom on the inner side of the conical transition section.

[0013] Preferably, the connecting pipe is distributed with a ventilation outlet, a ventilation channel and a ventilation inlet. The ventilation channel is located between the ventilation outlet and the ventilation inlet. The ventilation outlet is inclined upward and is adjacent to the top ventilation end; the ventilation inlet is inclined downward and is adjacent to the horizontal water inlet end.

[0014] Preferably, the connecting fitting includes a Y-shaped tee, a horizontal short pipe and a small-radius elbow. The horizontal end of the Y-shaped tee is connected to the horizontal water inlet end, the side port of the Y-shaped tee is connected to the horizontal short pipe, and the small-radius elbow is connected between the horizontal short pipe and the top ventilation end.

[0015] The beneficial effects of the present invention are as follows: The horizontal offset rotary pressure-balanced elbow of the present invention adds a tangential transition section, a tangential water inlet section and a tangential outer circle section, increases the curvature, and the water flow enters the water in a spiral manner through the tangential water inlet section; at the same time, the top ventilation end is used for ventilation, so that the water flow in the offset horizontal pipe enters the drainage riser, eliminating the phenomenon of "water tongue". In addition, the air flow in the upper part of the offset horizontal pipe passes through the top ventilation end, realizing the pressure stabilization of the drainage system and ensuring that the drainage system will not have the problem of drainage system odor return. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a horizontal offset rotary pressure-balanced elbow for a drainage riser of the present invention;

[0018] Figure 2 It is a schematic structural diagram of a horizontal offset rotary pressure-balanced elbow for a drainage riser of the present invention;

[0019] Figure 3 This is a schematic structural diagram of a horizontal offset rotary pressure - equalizing elbow for a drainage riser in the present invention;

[0020] Figure 4 This is a side view of a horizontal offset rotary pressure - equalizing elbow for a drainage riser in the present invention;

[0021] Figure 5 is Figure 4 view A - A in

[0022] Figure 6 This is a side view of a horizontal offset rotary pressure - equalizing elbow for a drainage riser in the present invention;

[0023] Figure 7 is Figure 6 view C - C in

[0024] Figure 8 This is a schematic structural diagram of the detachable connection between the horizontal water inlet end and the top ventilation end of the horizontal offset rotary pressure - equalizing elbow for a drainage riser in the present invention;

[0025] Figure 9 This is a schematic structural diagram of the integral connection between the horizontal water inlet end and the top ventilation end of the horizontal offset rotary pressure - equalizing elbow for a drainage riser in the present invention;

[0026] Figure 10 is Figure 8 the application of the horizontal offset rotary pressure - equalizing elbow for a drainage riser shown in

[0027] Figure 11 is Figure 9 the application of the horizontal offset rotary pressure - equalizing elbow for a drainage riser shown in

[0028] In the figure:

[0029] 1. Horizontal water inlet end; 2. Vertical water outlet end; 3. Top ventilation end; 4. Tangential transition section; 5. Tangential water inlet section; 6. Tangential outer - circle section; 7. Vertical expansion section; 8. Conical transition section; 9. Flow - guiding rib; 10. Connecting pipe; 11. Ventilation outlet; 12. Ventilation channel; 13. Ventilation inlet; 1,4. Y - type tee; 15. Horizontal short pipe; 16. Small - radius elbow; 17. Tangential water - inlet inflection point; 18. Offset horizontal pipe; 19. Drainage riser; 71. Expansion guiding surface. Detailed implementation mode

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1 to 4 shown, a horizontal offset rotary pressure-balanced elbow for a drainage riser includes: a horizontal water inlet end 1, a vertical water outlet end 2, and a top ventilation end 3. A tangential transition section 4 for deflecting the water flow direction is provided at the rear end of the horizontal water inlet end 1; a tangential water inlet section 5 tangent to the tangential transition section 4 is provided at the rear end of the tangential transition section 4, and the bending radius R1 of the tangential water inlet section 5 is inconsistent with the bending radius R2 of the tangential transition section 4; a tangential outer circle section 6 is provided on the outer side of the tangential water inlet section 5; the tangential outer circle section 6 and the top ventilation end 3 are communicated with a vertical expansion section 7; the lower end of the vertical expansion section 7 is provided as a conical transition section 8, and the lower end of the conical transition section 8 is provided as the vertical water outlet end 2.

[0032] As Figure 4 shown, the included angle range between the axis of the tangential transition section 4 and the axis of the horizontal water inlet end 1 is 10 degrees to 60 degrees. The inner side of the tangential outer circle section is provided as a tangential water inlet surface, and the radius of the tangential water inlet surface is greater than the radius of the tangential transition section. As Figure 6 shown, the included angle range between the horizontal water inlet end and the vertical water outlet end is 80 degrees to 90 degrees. As Figure 7 shown, the tangential water inlet inflection point 17 is at the junction of the tangential water inlet section and the tangential water inlet surface, and the distance between the tangential water inlet inflection point and the horizontal axis of the horizontal water inlet end is 0 to 15 mm.

[0033] As Figure 6 shown, the bending radius R from the horizontal water inlet end 1 to the vertical expansion section of the present invention is greater than or equal to 2 times the inner diameter of the horizontal water inlet end, increasing the elbow curvature radius and reducing the water flow velocity. As Figure 5 shown, a guide rib plate 9 is provided on the inner side of the conical transition section 8, and the guide rib plates are inclined from top to bottom on the inner side of the conical transition section; when the water flow enters the vertical expansion section 7, it falls on the guide rib plate 9, forming a spiral wall-attached flow state of the water flow and forming an air channel in the middle of the drainage riser. The outer side of the vertical expansion section 7 away from the horizontal water inlet end is provided as an arc-shaped expansion guide surface 71.

[0034] As Figure 8As shown, the horizontal water inlet end 1 is detachably connected to the top ventilation end 3. A connecting pipe fitting is provided between the horizontal water inlet end 1 and the top ventilation end 3. The connecting pipe fitting includes a Y-shaped tee 14, a horizontal short pipe 15, and a small-radius elbow 16. The horizontal end of the Y-shaped tee 14 is connected to the horizontal water inlet end, the side port of the Y-shaped tee 14 is connected to the horizontal short pipe 15, and the small-radius elbow 16 is connected between the horizontal short pipe and the top ventilation end. As Figure 8 and 10 shown, the application of the detachable connection between the horizontal water inlet end 1 and the top ventilation end 3. The structure of the connecting pipe fitting meets the exhaust requirement. The connecting pipe fitting includes a Y-shaped tee, a horizontal short pipe, and a small-radius elbow, which is more conducive to exhaust.

[0035] As Figure 9 shown, the horizontal water inlet end 1 is integrally connected to the top ventilation end 3. A connecting pipe 10 is provided between the port of the horizontal water inlet end 1 and the top side of the top ventilation end 3. The connecting pipe 10 is distributed with a ventilation outlet 11, a ventilation channel 12, and a ventilation inlet 13. The ventilation channel 12 is located between the ventilation outlet 11 and the ventilation inlet 13. The ventilation outlet is arranged to be upwardly inclined and is adjacent to the top ventilation end; the ventilation inlet is arranged to be downwardly inclined and is adjacent to the horizontal water inlet end. As Figure 9 and 11 shown, the application of the integral connection between the horizontal water inlet end 1 and the top ventilation end 3. The structure of the connecting pipe meets the exhaust requirement. The connecting pipe is distributed with a ventilation outlet 11, a ventilation channel 12, and a ventilation inlet 13, which is more conducive to exhaust.

[0036] Whether the horizontal water inlet end and the top ventilation end are integrally connected or detachably connected, a ventilation channel is formed therebetween, realizing that air is discharged from the offset horizontal pipe 18 to the drainage riser 19 along with the water flow, ensuring the pressure balance of the drainage system.

[0037] As Figure 10 and Figure 11 shown in the usage method: When the drainage system drains water, the water flow will carry a large amount of gas. After entering the offset horizontal pipe 18, the water filling degree is less than one-half of the pipe, and the upper part is an air channel. When the water flow passes through the horizontal water inlet end, it passes through the tangential transition section, causing the water flow direction to deflect, and then passes through the tangential water inlet section and discharges obliquely downward to the right along the tangential outer circle section into the vertical expansion section, falling on the guide rib fins, forming a spiral wall-attached flow state of the water flow, and forming an air channel in the middle of the drainage riser 19.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A horizontal offset rotary pressure - balanced elbow for a drainage riser, characterized in that including: it has a horizontal water inlet end, a vertical water outlet end and a top ventilation end. A tangential transition section for deflecting the water flow direction is provided at the rear end of the horizontal water inlet end; a tangential water inlet section tangent to the tangential transition section is provided at the rear end of the tangential transition section, and the bending radian of the tangential water inlet section is inconsistent with that of the tangential transition section; a tangential outer - circle section is provided on the outer side of the tangential water inlet section; the tangential outer - circle section and the top ventilation end are connected to a vertical expansion section; the lower end of the vertical expansion section is set as a conical transition section, and the lower end of the conical transition section is set as the vertical water outlet end. The horizontal water inlet end and the top ventilation end are integrally connected, and a connecting pipe is provided between the port of the horizontal water inlet end and the top side of the top ventilation end; or the horizontal water inlet end and the top ventilation end are detachably connected, and a connecting fitting is provided between the horizontal water inlet end and the top ventilation end. The outer side of the vertical expansion section far from the horizontal water inlet end is set as an arc - shaped expansion guiding surface.

2. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the bending radius from the horizontal water inlet end to the vertical expansion section is greater than or equal to 2 times the inner diameter of the horizontal water inlet end.

3. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the included angle range between the axis of the tangential transition section and the axis of the horizontal water inlet end is 10 degrees to 60 degrees; the radius of the tangential transition section is smaller than the radius of the tangential water inlet section.

4. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the included angle range between the horizontal water inlet end and the vertical water outlet end is 80 degrees to 90 degrees.

5. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the inner side of the tangential outer - circle section is set as a tangential water inlet surface, the intersection of the tangential water inlet section and the tangential water inlet surface is a tangential water inlet inflection point, and the horizontal distance between the tangential water inlet inflection point and the central axis of the horizontal water inlet end is 0 to 15 mm.

6. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that guide ribs are provided on the inner side of the conical transition section, and the guide ribs are inclined from top to bottom on the inner side of the conical transition section.

7. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the connecting pipe is distributed with ventilation outlets, ventilation channels and ventilation inlets. The ventilation channels are located between the ventilation outlets and the ventilation inlets. The ventilation outlets are arranged to be upward - inclined and are adjacent to the top ventilation end; the ventilation inlets are arranged to be downward - inclined and are adjacent to the horizontal water inlet end.

8. The horizontal offset rotary pressure - balanced elbow for a drainage riser according to claim 1, characterized in that the connecting fitting includes a Y - type tee, a horizontal short pipe and a small - radius elbow. The horizontal end of the Y - type tee is connected to the horizontal water inlet end, the side port of the Y - type tee is connected to the horizontal short pipe, and the small - radius elbow is connected between the horizontal short pipe and the top ventilation end.

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