Rotational flow elbow capable of stabilizing air exchange volume

Abstract

The utility model discloses a rotational flow elbow with stable ventilation volume, which comprises an upper pipeline and a lower pipeline, a bending area is arranged between the upper pipeline and the lower pipeline, a spiral area is arranged on one side of the upper pipeline close to the bending area, the spiral area forms spiral bulges on the inner wall of the upper pipeline, and the spiral bulges are arranged on the inner wall of the lower pipeline. The spiral protrusion can guide water flow in the upper pipeline to spirally flow into the bending area, and the spiral protrusion is arranged close to one side of the inner diameter of the bending area. According to the rotational flow elbow with the stable ventilation amount, the flowing state of water flowing downwards along the wall face of the upper pipeline is changed, the state of vertical flowing up and down perpendicular to the ground is changed into the state of rotational flowing along the wall face, and the stability of drainage of a system is improved by enabling air flowing to be smoother.

Description

Technical Field

[0001] This utility model relates to the field of water pipe technology, and in particular to a swirl bend with stable air exchange volume. Background Technology

[0002] As a type of pipe fitting in building drainage and sewage pipe network, single-pipe systems have advantages such as small space occupation, low cost, and easy maintenance. However, due to their relatively simple structure, they have disadvantages such as small drainage capacity and can only be used in low-rise buildings.

[0003] For example, publication number "CN208703381U" discloses "a splash-proof elbow water pipe," which includes a plastic outer tube. The inner wall of the plastic outer tube is bonded with iron foil through an adhesive layer. Fixing rods are installed on the left and right outer walls of both ends of the plastic outer tube. Water pipes are sleeved at both ends of the plastic outer tube. Fixing rods are installed on the left and right sides of the water pipe near the end of the plastic outer tube, and a cavity is formed between the fixing rods. The bottom of the cavity is filled with sealing material, and a pressure cap is installed on the top of the cavity. However, in practical applications, this type of elbow water pipe narrows or even blocks the air passage in the drain pipe, hindering airflow and resulting in poor drainage. This leads to fluctuating drainage volume and a generally low drainage rate. Summary of the Invention

[0004] In response to the problem mentioned in the background art that the narrowing of the air channel leads to poor drainage in the existing technology, this utility model provides a vortex elbow with stable air exchange volume. By changing the flow state of water flowing downward along the wall of the upper pipe, the vertical flow state is changed to the swirling flow state along the wall, thereby increasing the stability of the system drainage by making the air flow smoother.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A swirl bend with stable ventilation volume includes an upper pipe and a lower pipe. A bend zone is provided between the upper pipe and the lower pipe. A spiral zone is provided on the side of the upper pipe near the bend zone. The spiral zone forms a spiral protrusion on the inner wall of the upper pipe. The spiral protrusion can guide the water flow in the upper pipe into the bend zone in a spiral motion. The spiral protrusion is located on the side near the inner diameter of the bend zone.

[0007] Single-pipe systems, as a type of building drainage and sewage pipe network, have advantages such as small footprint, low cost, and easy maintenance. However, due to their relatively simple structure, they also have disadvantages such as limited drainage capacity and suitability only for low-rise buildings. During operation, the structure of a single-pipe drainage system allows air and water to flow directly through the same pipe. Ordinary 90° elbows narrow or even block the air passage in the drainage pipe, hindering air circulation and leading to poor drainage. This results in fluctuating drainage volume and consistently low drainage rates. If drainage demand becomes saturated, the pipe may experience temporary blockage, preventing normal drainage and sewage discharge. Ordinary elbows in single-pipe drainage systems sometimes become clogged, failing to meet drainage requirements. As water flows through a bend, gravity and the wall cause it to flow downwards at an angle instead of along the wall. This creates a water curtain inside the pipe, preventing air exchange at the horizontal pipe opening from entering the pipe. This creates a partial, vacuum-like area in a small section, hindering normal water flow and affecting the overall drainage flow and performance of the single-pipe drainage system.

[0008] This application improves the structure of the elbow, allowing for smoother airflow within the single-pipe drainage system during operation, thereby increasing the overall drainage capacity. It solves the problem of poor airflow during drainage, resulting in a more stable drainage flow and improved drainage system capacity. Specifically, this application incorporates a spiral zone on the upper pipe, forming spiral protrusions on the inner wall of the upper pipe. These protrusions guide the water flow from the upper pipe into the bend zone, altering the downward flow of water along the wall. This change transforms the vertical flow to a rotating flow along the wall, naturally creating an air channel in the center of the elbow riser. The smoother airflow increases the stability of the drainage system. Furthermore, the spiral effect allows water to flow spirally through the bend zone, preventing water curtains from easily obstructing airflow between the upper and lower pipes and ensuring efficient water flow.

[0009] Preferably, the spiral region has a wide pitch structure. By setting the spiral region to a wide pitch structure, the water flow velocity is relatively high during the flow of water through the upper pipe, which is quite long. This is due to the gravitational acceleration of the water flow. The wide pitch guide allows for a smoother change in the water flow direction, preventing the water from directly impacting the spiral protrusions and causing turbulence, and also reducing noise generation.

[0010] Preferably, the spiral region has spiral protrusions only on the side of the inner diameter near the bending region. By setting the spiral protrusions only on the side of the inner diameter near the bending region, the water flow on the side of the outer diameter of the bending region can flow smoothly, while reducing the water curtain formed on the side of the inner diameter of the bending region due to the height difference. This guides the water flow from the side of the inner diameter of the bending region to the side of the outer diameter of the bending region, thus preventing the water flow from converging on the side of the inner diameter of the bending region, thereby reducing the formation of water curtains and improving the efficiency of water flow.

[0011] Preferably, a baffle area is provided on one side of the inner diameter of the bending area, and the baffle area has a baffle protrusion formed on the inner wall of the bending area. By providing the baffle area on the bending area, a baffle protrusion is formed on the inner wall of the bending area. Since the water flows from the upper pipe to the bending area, and the upper pipe is a vertical pipe, a conventional elbow water pipe would form a water curtain on the bending area, blocking airflow. This baffle protrusion can block the water flowing to the upper wall of the bending area in advance, creating a larger airflow channel in the bending area. The purpose is also to increase the stability of airflow, thereby improving drainage capacity.

[0012] Preferably, the baffle protrusion extends to the inner wall of the lower pipe. Because the water flow produces a teapot effect, the water may flow along the upper wall of the bend area, or even flow to the upper wall of the lower pipe. Therefore, a water curtain will randomly form in this area. Extending the baffle protrusion to the inner wall of the lower pipe can reduce the probability of water curtain formation blocking the airflow channel.

[0013] Preferably, in the vertical direction, the baffle protrusion is located below the spiral protrusion. Positioning the baffle protrusion below the spiral protrusion avoids interference, and since most of the water flow above is guided by the spiral protrusion, there is less water flow in the area between the spiral protrusion and the baffle protrusion, which does not significantly obstruct airflow.

[0014] Preferably, the size of the baffle protrusion gradually increases along the water flow direction. This increase in the size of the baffle protrusion along the water flow direction allows the baffle protrusion in the inner wall of the water pipe to rise smoothly. This reduces the obstruction encountered by the water flow when it encounters the baffle protrusion, decreases the formation of turbulence, and helps the water flow smoothly transition to create an airflow channel.

[0015] Preferably, the bending zone has a flat structure. Setting the bending zone as a flat structure can slow down the water flow velocity within the bending zone, resulting in a smoother water flow.

[0016] Preferably, the bending zone has an asymmetrical structure, including an expanded-diameter half-pipe, where the water flow guided by the spiral protrusion converges. By setting the bending zone as an asymmetrical structure, with one side being an expanded-diameter half-pipe, the pipe diameter is expanded, slightly slowing the water flow velocity and reducing the volume fraction of water flowing to the upper wall, thereby reducing the impact of the water flow on the airflow. The spiral protrusion guides the water flow to the expanded-diameter half-pipe, ensuring that most of the water flow is at a reduced velocity. Furthermore, since the water flow guided by the spiral protrusion has the inertia of spiral motion, it is not necessary to extend the spiral protrusion to the expanded-diameter half-pipe; it is only necessary to ensure that the water flow spirally to the expanded-diameter half-pipe under the influence of inertia.

[0017] Preferably, the bending zone includes a narrow-diameter elliptical half-tube, which is connected to an expanded-diameter half-tube to form a flat bending zone. The bending zone also includes a narrow-diameter elliptical half-tube, which is connected to the expanded-diameter half-tube to form a flat bending zone. The elliptical radius of the narrow-diameter ellipse is also designed to create a structure where the diameters of the tubes on the left and right sides of the bending zone are different sizes.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) By changing the flow state of the water flowing down the wall of the upper pipe, the vertical flow state is changed to the rotating flow state along the wall, and the stability of the system drainage is increased by making the air flow smoother.

[0020] (2) By expanding the diameter of the half-pipe, the water flow velocity will be slightly reduced, reducing the volume fraction of water flowing to the upper wall, thereby reducing the impact of water flow on air flow.

[0021] (3) The baffle protrusion can block the water flowing to the upper wall of the transverse section in advance, and there is a large air flow channel in the bending area, which increases the stability of air flow and thus improves the drainage capacity. Attached Figure Description

[0022] Figure 1 This is an isometric drawing of this utility model.

[0023] Figure 2 This is a cross-sectional view of the present invention.

[0024] Figure 3 yes Figure 2 Sectional view of AA

[0025] In the picture:

[0026] 1. Pipeline;

[0027] 2. Lower pipe;

[0028] 3. Bending zone; 31. Expanded diameter half-pipe; 32. Narrow diameter elliptical half-pipe;

[0029] 4 spiral regions, 41 spiral protrusions;

[0030] 5. Baffle area, 51. Baffle protrusion. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1:

[0033] like Figure 1 , 2 As shown, a swirl bend with stable ventilation volume includes an upper pipe 1 and a lower pipe 2. A bend zone 3 is provided between the upper pipe 1 and the lower pipe 2. A spiral zone 4 is provided on the side of the upper pipe 1 near the bend zone 3. The spiral zone 4 forms a spiral protrusion 41 on the inner wall of the upper pipe 1. The spiral protrusion 41 can guide the water flow in the upper pipe 1 into the bend zone 3 in a spiral manner. The spiral protrusion 41 is provided on the side near the inner diameter of the bend zone 3.

[0034] Single-pipe systems, as a type of building drainage and sewage pipe network, have advantages such as small footprint, low cost, and easy maintenance. However, due to their relatively simple structure, they also have disadvantages such as limited drainage capacity and suitability only for low-rise buildings. During operation, the structure of a single-pipe drainage system allows air and water to flow directly through the same pipe. Ordinary 90° elbows narrow or even block the air passage in the drainage pipe, hindering air circulation and leading to poor drainage. This results in fluctuating drainage volume and consistently low drainage rates. If drainage demand becomes saturated, the pipe may experience temporary blockage, preventing normal drainage and sewage discharge. Ordinary elbows in single-pipe drainage systems sometimes become clogged, failing to meet drainage requirements. As water flows through a bend, gravity and the wall cause it to flow downwards at an angle instead of along the wall. This creates a water curtain inside the pipe, preventing air exchange at the horizontal pipe opening from entering the pipe. This creates a partial, vacuum-like area in a small section, hindering normal water flow and affecting the overall drainage flow and performance of the single-pipe drainage system.

[0035] This application improves the structure of the elbow, allowing for smoother airflow within the single-pipe drainage system during operation, thereby increasing the overall drainage capacity. It solves the problem of poor airflow during drainage, resulting in a more stable drainage flow and improved drainage system capacity. Specifically, a spiral zone 4 is provided on the upper pipe 1, forming a spiral protrusion 41 on the inner wall of the upper pipe 1. This spiral protrusion 41 guides the water flow from the upper pipe 1 to the bending zone 3. Therefore, the spiral zone 4 changes the downward flow of water along the wall of the upper pipe 1, transforming it from a vertical flow to a rotating flow along the wall. This change naturally creates an air channel in the center of the elbow riser, increasing the stability of the drainage system by making the airflow smoother. Simultaneously, due to the spiral effect of the water flow, the water flow in the bending zone 3 can spiral through, preventing the formation of a water curtain between the upper pipe 1 and the lower pipe 2 that obstructs airflow and ensuring efficient water flow.

[0036] like Figure 1 As shown, the spiral region 4 has a wide pitch structure. By setting the spiral region 4 to a wide pitch structure, during the flow of water in the upper pipe 1, due to the relatively long upper pipe 1, the water flow velocity is relatively high under the action of gravity acceleration. The wide pitch guide can make the change of water flow direction more smooth, avoid the water flow directly impacting the spiral protrusion 41, which would cause turbulence, and also reduce the generation of noise.

[0037] like Figure 1 As shown, the spiral region 4 has a spiral protrusion 41 only on the side of the inner diameter near the bending region 3. By setting the spiral protrusion 41 only on the side of the inner diameter near the bending region 3, the water flow on the side of the outer diameter of the bending region 3 can flow smoothly. At the same time, it reduces the water curtain formed on the side of the inner diameter of the bending region 3 due to the height difference. It guides the water flow from the side of the inner diameter of the bending region 3 to the side of the outer diameter of the bending region 3, so that the water flow will not converge on the side of the inner diameter of the bending region 3, thereby reducing the formation of the water curtain and improving the efficiency of the water flow.

[0038] Example 2:

[0039] like Figure 1 , 2 As shown, a swirl bend with stable ventilation volume includes an upper pipe 1 and a lower pipe 2. A bend zone 3 is provided between the upper pipe 1 and the lower pipe 2. A spiral zone 4 is provided on the side of the upper pipe 1 near the bend zone 3. The spiral zone 4 forms a spiral protrusion 41 on the inner wall of the upper pipe 1. The spiral protrusion 41 can guide the water flow in the upper pipe 1 into the bend zone 3 in a spiral manner. The spiral protrusion 41 is provided on the side near the inner diameter of the bend zone 3.

[0040] Single-pipe systems, as a type of building drainage and sewage pipe network, have advantages such as small footprint, low cost, and easy maintenance. However, due to their relatively simple structure, they also have disadvantages such as limited drainage capacity and suitability only for low-rise buildings. During operation, the structure of a single-pipe drainage system allows air and water to flow directly through the same pipe. Ordinary 90° elbows narrow or even block the air passage in the drainage pipe, hindering air circulation and leading to poor drainage. This results in fluctuating drainage volume and consistently low drainage rates. If drainage demand becomes saturated, the pipe may experience temporary blockage, preventing normal drainage and sewage discharge. Ordinary elbows in single-pipe drainage systems sometimes become clogged, failing to meet drainage requirements. As water flows through a bend, gravity and the wall cause it to flow downwards at an angle instead of along the wall. This creates a water curtain inside the pipe, preventing air exchange at the horizontal pipe opening from entering the pipe. This creates a partial, vacuum-like area in a small section, hindering normal water flow and affecting the overall drainage flow and performance of the single-pipe drainage system.

[0041] This application improves the structure of the elbow, allowing for smoother airflow within the single-pipe drainage system during operation, thereby increasing the overall drainage capacity. It solves the problem of poor airflow during drainage, resulting in a more stable drainage flow and improved drainage system capacity. Specifically, a spiral zone 4 is provided on the upper pipe 1, forming a spiral protrusion 41 on the inner wall of the upper pipe 1. This spiral protrusion 41 guides the water flow from the upper pipe 1 to the bending zone 3. Therefore, the spiral zone 4 changes the downward flow of water along the wall of the upper pipe 1, transforming it from a vertical flow to a rotating flow along the wall. This change naturally creates an air channel in the center of the elbow riser, increasing the stability of the drainage system by making the airflow smoother. Simultaneously, due to the spiral effect of the water flow, the water flow in the bending zone 3 can spiral through, preventing the formation of a water curtain between the upper pipe 1 and the lower pipe 2 that obstructs airflow and ensuring efficient water flow.

[0042] like Figure 1 As shown, the spiral region 4 has a wide pitch structure. By setting the spiral region 4 to a wide pitch structure, during the flow of water in the upper pipe 1, due to the relatively long upper pipe 1, the water flow velocity is relatively high under the action of gravity acceleration. The wide pitch guide can make the change of water flow direction more smooth, avoid the water flow directly impacting the spiral protrusion 41, which would cause turbulence, and also reduce the generation of noise.

[0043] like Figure 1As shown, the spiral region 4 has a spiral protrusion 41 only on the side of the inner diameter near the bending region 3. By setting the spiral protrusion 41 only on the side of the inner diameter near the bending region 3, the water flow on the side of the outer diameter of the bending region 3 can flow smoothly. At the same time, it reduces the water curtain formed on the side of the inner diameter of the bending region 3 due to the height difference. It guides the water flow from the side of the inner diameter of the bending region 3 to the side of the outer diameter of the bending region 3, so that the water flow will not converge on the side of the inner diameter of the bending region 3, thereby reducing the formation of the water curtain and improving the efficiency of the water flow.

[0044] like Figure 1 , 2 As shown, a baffle area 5 is provided on one side of the inner diameter of the bending area 3, and a baffle protrusion 51 is formed on the inner wall of the bending area 3. By providing the baffle area 5 on the bending area 3, a baffle protrusion 51 can be formed on the inner wall of the bending area 3. Since the water flows from the upper pipe 1 to the bending area 3, and since the upper pipe 1 is a vertical pipe, a conventional elbow water pipe would form a water curtain on the bending area 3, blocking the air flow. The baffle protrusion 51 can block the water flowing to the upper wall of the bending area 3 in advance, so that the bending area 3 has a larger air flow channel. The purpose is also to increase the stability of air flow, thereby improving the drainage capacity.

[0045] like Figure 2 As shown, the baffle protrusion 51 extends to the inner wall of the lower pipe 2. Due to the teapot effect when the water flows, the water may flow along the upper wall of the bend 3, or even flow to the upper wall of the lower pipe 2. Therefore, the water curtain will be randomly formed in this area. Extending the baffle protrusion 51 to the inner wall of the lower pipe 2 can reduce the probability of the water curtain forming and blocking the airflow channel.

[0046] like Figure 1 As shown, in the vertical direction, the baffle protrusion 51 is located below the spiral protrusion 41. Placing the baffle protrusion 51 below the spiral protrusion 41 can avoid interference. Since most of the water flow above is guided by the spiral protrusion 41, there is less water flow in the interval between the spiral protrusion 41 and the baffle protrusion 51, which will not significantly obstruct the airflow.

[0047] like Figure 2 As shown, the protrusion size of the baffle protrusion 51 gradually increases along the water flow direction. This gradual increase in the protrusion size of the baffle protrusion 51 along the water flow direction allows the baffle protrusion 51 to rise smoothly within the water pipe wall. This reduces the obstruction encountered by the water flow when it encounters the baffle protrusion 51, decreases the formation of turbulence, and helps the water flow smoothly transition to create an airflow channel.

[0048] Example 3:

[0049] like Figure 1 , 2 As shown, a swirl bend with stable ventilation volume includes an upper pipe 1 and a lower pipe 2. A bend zone 3 is provided between the upper pipe 1 and the lower pipe 2. A spiral zone 4 is provided on the side of the upper pipe 1 near the bend zone 3. The spiral zone 4 forms a spiral protrusion 41 on the inner wall of the upper pipe 1. The spiral protrusion 41 can guide the water flow in the upper pipe 1 into the bend zone 3 in a spiral manner. The spiral protrusion 41 is provided on the side near the inner diameter of the bend zone 3.

[0050] Single-pipe systems, as a type of building drainage and sewage pipe network, have advantages such as small footprint, low cost, and easy maintenance. However, due to their relatively simple structure, they also have disadvantages such as limited drainage capacity and suitability only for low-rise buildings. During operation, the structure of a single-pipe drainage system allows air and water to flow directly through the same pipe. Ordinary 90° elbows narrow or even block the air passage in the drainage pipe, hindering air circulation and leading to poor drainage. This results in fluctuating drainage volume and consistently low drainage rates. If drainage demand becomes saturated, the pipe may experience temporary blockage, preventing normal drainage and sewage discharge. Ordinary elbows in single-pipe drainage systems sometimes become clogged, failing to meet drainage requirements. As water flows through a bend, gravity and the wall cause it to flow downwards at an angle instead of along the wall. This creates a water curtain inside the pipe, preventing air exchange at the horizontal pipe opening from entering the pipe. This creates a partial, vacuum-like area in a small section, hindering normal water flow and affecting the overall drainage flow and performance of the single-pipe drainage system.

[0051] This application improves the structure of the elbow, allowing for smoother airflow within the single-pipe drainage system during operation, thereby increasing the overall drainage capacity. It solves the problem of poor airflow during drainage, resulting in a more stable drainage flow and improved drainage system capacity. Specifically, a spiral zone 4 is provided on the upper pipe 1, forming a spiral protrusion 41 on the inner wall of the upper pipe 1. This spiral protrusion 41 guides the water flow from the upper pipe 1 to the bending zone 3. Therefore, the spiral zone 4 changes the downward flow of water along the wall of the upper pipe 1, transforming it from a vertical flow to a rotating flow along the wall. This change naturally creates an air channel in the center of the elbow riser, increasing the stability of the drainage system by making the airflow smoother. Simultaneously, due to the spiral effect of the water flow, the water flow in the bending zone 3 can spiral through, preventing the formation of a water curtain between the upper pipe 1 and the lower pipe 2 that obstructs airflow and ensuring efficient water flow.

[0052] like Figure 1As shown, the spiral region 4 has a wide pitch structure. By setting the spiral region 4 to a wide pitch structure, during the flow of water in the upper pipe 1, due to the relatively long upper pipe 1, the water flow velocity is relatively high under the action of gravity acceleration. The wide pitch guide can make the change of water flow direction more smooth, avoid the water flow directly impacting the spiral protrusion 41, which would cause turbulence, and also reduce the generation of noise.

[0053] like Figure 1 As shown, the spiral region 4 has a spiral protrusion 41 only on the side of the inner diameter near the bending region 3. By setting the spiral protrusion 41 only on the side of the inner diameter near the bending region 3, the water flow on the side of the outer diameter of the bending region 3 can flow smoothly. At the same time, it reduces the water curtain formed on the side of the inner diameter of the bending region 3 due to the height difference. It guides the water flow from the side of the inner diameter of the bending region 3 to the side of the outer diameter of the bending region 3, so that the water flow will not converge on the side of the inner diameter of the bending region 3, thereby reducing the formation of the water curtain and improving the efficiency of the water flow.

[0054] like Figure 1 , 2 As shown, a baffle area 5 is provided on one side of the inner diameter of the bending area 3, and a baffle protrusion 51 is formed on the inner wall of the bending area 3. By providing the baffle area 5 on the bending area 3, a baffle protrusion 51 can be formed on the inner wall of the bending area 3. Since the water flows from the upper pipe 1 to the bending area 3, and since the upper pipe 1 is a vertical pipe, a conventional elbow water pipe would form a water curtain on the bending area 3, blocking the air flow. The baffle protrusion 51 can block the water flowing to the upper wall of the bending area 3 in advance, so that the bending area 3 has a larger air flow channel. The purpose is also to increase the stability of air flow, thereby improving the drainage capacity.

[0055] like Figure 2 As shown, the baffle protrusion 51 extends to the inner wall of the lower pipe 2. Due to the teapot effect when the water flows, the water may flow along the upper wall of the bend 3, or even flow to the upper wall of the lower pipe 2. Therefore, the water curtain will be randomly formed in this area. Extending the baffle protrusion 51 to the inner wall of the lower pipe 2 can reduce the probability of the water curtain forming and blocking the airflow channel.

[0056] like Figure 1 As shown, in the vertical direction, the baffle protrusion 51 is located below the spiral protrusion 41. Placing the baffle protrusion 51 below the spiral protrusion 41 can avoid interference. Since most of the water flow above is guided by the spiral protrusion 41, there is less water flow in the interval between the spiral protrusion 41 and the baffle protrusion 51, which will not significantly obstruct the airflow.

[0057] like Figure 2As shown, the protrusion size of the baffle protrusion 51 gradually increases along the water flow direction. This gradual increase in the protrusion size of the baffle protrusion 51 along the water flow direction allows the baffle protrusion 51 to rise smoothly within the water pipe wall. This reduces the obstruction encountered by the water flow when it encounters the baffle protrusion 51, decreases the formation of turbulence, and helps the water flow smoothly transition to create an airflow channel.

[0058] like Figure 1 As shown, the bending zone 3 has a flat structure. Setting the bending zone 3 as a flat structure can slow down the water flow velocity within it, making the water flow more stable.

[0059] like Figure 2 , 3 As shown, the bending zone 3 has an asymmetrical structure, including an expanded diameter half-pipe 31. The water flow guided by the spiral protrusion 41 converges at the expanded diameter half-pipe 31. By setting the bending zone 3 as an asymmetrical structure, with one side being an expanded diameter half-pipe 31, the pipe diameter is expanded, which slightly slows down the water flow velocity, reduces the volume fraction of water flowing to the upper wall, and thus reduces the impact of the water flow on the air flow. The water flow guided by the spiral protrusion 41 is guided to the expanded diameter half-pipe 31, thereby ensuring that most of the water flow can reduce the flow velocity. Furthermore, since the water flow guided by the spiral protrusion 41 has the inertia of spiral motion, it is not necessary to extend the spiral protrusion 41 to the expanded diameter half-pipe 31; it is only necessary to ensure that the water flow can spirally flow to the expanded diameter half-pipe 31 under the action of inertia.

[0060] like Figure 3 As shown, the bending zone 3 includes a narrow-diameter elliptical half-pipe 32, which is connected to the expanded-diameter half-pipe 31 to form a flat bending zone 3. The bending zone 3 also includes a narrow-diameter elliptical half-pipe 32, which is connected to the expanded-diameter half-pipe 31 to form a flat bending zone 3. The elliptical radius of the narrow-diameter ellipse is also set to form a structure in which the pipe diameters on the left and right sides of the bending zone 3 are different sizes.

Claims

1. A swirl bend with stable ventilation volume, characterized in that, It includes an upper pipe and a lower pipe, with a bend between the upper pipe and the lower pipe. A spiral section is provided on the side of the upper pipe near the bend section. The spiral section forms a spiral protrusion on the inner wall of the upper pipe. The spiral protrusion can guide the water flow in the upper pipe into the bend section in a spiral motion. The spiral protrusion is located on the side of the inner diameter of the bend section.

2. The swirl bend with stable ventilation volume according to claim 1, characterized in that, The spiral region has a wide pitch structure.

3. The swirl bend with stable ventilation volume according to claim 1, characterized in that, The spiral region has a spiral protrusion only on the inner diameter side near the bending region.

4. A swirl bend with stable ventilation volume as described in claim 1, characterized in that, A baffle area is provided on one side of the inner diameter of the bending area, and a baffle protrusion is formed on the inner wall of the bending area.

5. A swirl bend with stable ventilation volume as described in claim 4, characterized in that, The baffle protrusion extends to the inner wall of the lower pipe.

6. A swirl bend with stable ventilation volume as described in claim 4, characterized in that, In the vertical direction, the baffle protrusion is located below the spiral protrusion.

7. A swirl bend with stable ventilation volume as described in claim 4, characterized in that, Along the direction of water flow, the size of the protrusions on the baffle gradually increases.

8. A swirl bend with stable ventilation volume according to any one of claims 1-7, characterized in that, The bending area has a flat structure.

9. A swirl bend with stable ventilation volume according to any one of claims 1-7, characterized in that, The bending zone has an asymmetrical structure and includes an enlarged-diameter half-pipe, where the water flow guided by the spiral protrusion converges.

10. A swirl bend with stable ventilation volume according to claim 9, characterized in that, The bending zone includes a narrow-diameter elliptical half-tube, which is connected to an expanded-diameter half-tube to form a flat bending zone.

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