Large-flow spiral pipe structure

Abstract

The utility model discloses a large-flow spiral pipe structure which comprises a plurality of grooves arranged in parallel and located in the inner wall of a pipeline, and protrusions are arranged between the adjacent grooves. The included angle between the extending direction of the grooves and the axis of the pipeline is smaller than 15 degrees, the grooves and the protrusions are arranged on the inner wall of the pipeline in an array mode, and the outer side of the inner wall of the pipeline is connected with a cylindrical pipe outer wall. The drainage performance of the pipeline is improved, and the pipeline can be used as a single vertical pipe as well as a double-vertical pipe; the problem of out-of-roundness caused by few spiral ribs or non-uniform distribution is solved; and the problem of outer wall shrinkage spiral marks caused by the spiral ribs is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of spiral tubes, in particular to a large-flow spiral tube structure. Background Art

[0002] As for spiral tubes, there are many forms on the market, including 1 rib, 6 ribs, 12 ribs, 16 ribs, etc. There are also spiral tubes with large ribs and small ribs. When the pipe diameter, wall thickness, rib section, material, and pitch are the same, the more ribs there are, the greater the flow rate, but the increase in ribs will lead to an increase in the gram weight of the product; and when the number of ribs is small or the distribution is asymmetrical, the stress distribution of the spiral ribs is uneven, which makes the pipe prone to non-roundness. The ribs of the spiral tube with 1 rib are odd and the stress distribution is uneven, resulting in non-roundness of the pipe. The ribs of the spiral tube with 2 ribs are in the symmetrical direction, resulting in greater non-roundness; the ribs of the spiral tube with 3 ribs are distributed at 120°, and the non-roundness is reduced, but the pipe presents a certain triangle shape. The non-roundness of the spiral tube with 4 ribs is reduced. When the number of basic ribs reaches 5-6, the non-roundness and appearance of the product are better. However, as the number of ribs increases, the gram weight of the pipe also increases. And the production efficiency of the pipe also decreases.

[0003] For example, a "multi-head spiral segment tube body and multi-head spiral groove heat exchange tube" disclosed in Chinese patent literature, with publication number: CN104848726A, discloses that the cross-section of the multi-head spiral segment tube body (1) is a circle (2) surrounded by wavy lines, the center of the circle (2) is hollow, and the multi-head spiral segment tube body (1) is formed by spiral extension of various points on the circle (2) around the center of the circle (2) along the same spiral trajectory, and the hollow center of the circle (2) forms the hollow interior (3) of the tube body (1). Due to the structure of the multi-head spiral grooves, the heat exchange capacity is greatly enhanced by increasing the heat exchange area and improving the heat exchange coefficient. However, this proposal does not take into account the problems of uneven stress and non-roundness. Summary of the invention

[0004] In order to solve the problems of uneven stress and out-of-roundness of spiral tubes in the prior art, the utility model provides a large-flow spiral tube structure, which uses concave-convex curved surfaces instead of spiral ribs as water flow guides, and has the effects of guiding flow, reducing speed and stabilizing pressure.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large flow spiral pipe structure, comprising: a plurality of grooves arranged in parallel, the grooves are located on the inner wall of the pipe, and protrusions are arranged between adjacent grooves; the angle between the groove extension direction and the axis of the pipe is less than 15 degrees, the grooves and protrusions are arranged in array on the inner wall of the pipe, and the outer side of the inner wall of the pipe is connected to the outer wall of the cylindrical pipe. Using a large curved surface as a guide for water flow can reduce the flow of water and increase the friction of the inner wall of the pipe. The difference between the concave surface and the convex surface forms a certain height. The reduced gram weight of the concave surface can be used on the inner wall of the convex pipe, so that the gram weight of the product is not increased.

[0007] Preferably, the two sides of the groove are connected to the protrusion, the two sides of the groove and the protrusion share the same side wall, the bottom of the groove is a circular arc surface, and the circular arc surface is an inward concave surface, so that a large range of the inner wall of the pipeline can be covered when the pitch is large.

[0008] Preferably, the protrusion has an arc-shaped upper surface, both sides of which are connected to the side walls of the groove, and the arc-shaped upper surface is an outwardly convex arc, so that the force on the inner wall of the pipeline is more uniform.

[0009] Preferably, the number of the protrusions and the number of the grooves are the same, the protrusions and the grooves together form the inner wall of the pipe, and the inner side of the axial section of the inner wall of the pipe is a regular wave shape, so that the inner wall of the pipe is subjected to uniform force.

[0010] Preferably, the protrusion includes a top surface and two side surfaces located on both sides of the top surface, and the height of the side surfaces is smaller than the width of the top surface, so that the radius of the inner wall is larger, which is convenient for guiding the water flow.

[0011] Preferably, the two side surfaces constitute two side walls of the groove, and the groove includes a bottom surface, the width of which is slightly smaller than the width of the top surface, thereby forming a large curved surface to facilitate the guidance of water flow.

[0012] Preferably, the connection between the side and the bottom is provided with an arc, and the center of the arc is connected to the intersection of the center lines of the side and the bottom, forming a curved surface to facilitate guidance and avoid stress concentration.

[0013] Preferably, the extension direction of the protrusion is the same as that of the groove, and the angle between the extension direction of the protrusion and the axis of the pipeline is less than 15 degrees, thereby achieving water guidance and increasing the friction of the inner wall of the pipeline.

[0014] The utility model has the following advantages:

[0015] (1) It improves the drainage performance of the pipeline, which can not only meet the needs of double vertical pipes, but also can be used as a single vertical pipe; (2) It solves the problem of out-of-roundness caused by fewer spiral ribs or uneven distribution; (3) It solves the problem of spiral marks on the outer wall caused by spiral ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described below are merely exemplary. A person skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] Figure 1 It is a schematic structural diagram of an embodiment.

[0018] Figure 2 2 is a schematic diagram of a radial cross section in the embodiment.

[0019] In the figure:

[0020] 1- pipe; 2- protrusion; 3- groove. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0022] like Figure 1-2 As shown, in a preferred embodiment, the utility model discloses a large flow spiral pipe structure, including: multiple grooves 3 arranged in parallel, multiple grooves slow down the water flow speed; the grooves are located on the inner wall of the pipe, so that the weight of the inner wall of the pipe is reduced; protrusions 2 are arranged between adjacent grooves 3 to guide the water flow, and the protrusions and grooves are arranged in a staggered manner to improve the water flow efficiency of the inner wall of the pipe; the angle between the groove extension direction and the axis of the pipe 1 is less than 15 degrees, which further extends the range of each protrusion and groove and reduces the number of protrusions and grooves; the grooves and protrusions are arranged in an array on the inner wall of the pipe to guide the water flow, replacing the spiral ribs with a triangular cross section, and the guidance can be achieved without increasing the rib height; the outer side of the inner wall of the pipe is connected to the outer wall of the cylindrical pipe to ensure that the quality of the pipe itself remains unchanged. Using a large curved surface as a guide for water flow can reduce the flow of water and increase the friction of the inner wall of the pipe. The difference between the concave surface and the convex surface forms a certain height. The gram weight reduced by the concave surface can be used on the inner wall of the convex pipe, so that the gram weight of the product is not increased.

[0023] When in use, water flows along the protrusions in the inner wall of the pipe and follows the direction of the surface of the protrusions; at the same time, affected by the grooves, the water flows into the grooves, and friction is generated between the water flow and the grooves. The friction reduces the flow speed of the water flow and improves the drainage performance of the pipe. This solution can not only meet the use of double vertical pipes, but also meet the use of single vertical pipes.

[0024] In other embodiments, a groove and a protrusion serve as a group of guide components, and a plurality of adjacent groups of guide components are arranged in the inner wall of the pipe, and the guide components extend from the upper left side to the lower right side of the inner wall of the pipe to form a spiral guide. The protrusions in each group of guide components abut against the grooves in an adjacent group of guide components, and the grooves in each group of guide components abut against the protrusions in another adjacent group of guide components. Through the above arrangement, an even number of grooves and an even number of protrusions are arranged in the inner wall of the conduit, so that the number of grooves and protrusions is not less than two, so that the inner wall of the pipe always has a sufficient number of guide components.

[0025] When in use, a groove is added to the inner wall of the pipe, and a natural bulge is formed through the design of the groove, and then the height is added to the formed bulge as required, so that the overall weight of the pipe does not change, and the shape of the pipe does not change. This ensures that after the guide component is determined as required, the force on the pipe is still balanced, avoiding stress concentration, thereby avoiding the increase of out-of-roundness caused by pipe deformation, and avoiding shrinkage marks caused by stress concentration, which leads to a decrease in the life of the pipe.

[0026] In other embodiments, the two sides of the groove are connected to the protrusion, so that the water flow is guided by the protrusion and the flow rate is limited by the groove, thereby improving the stability of the water flow; the two sides of the groove share the same side wall with the protrusion, so that the protrusion does not need additional processing, avoiding the generation of additional stress. The bottom of the groove is an arc surface, and the arc surface guides the water flow in the groove in the same direction as the water flow, and the arc surface makes the water flow in the groove smoother. The arc surface is an inward concave surface, which improves the smoothness of the water flow. When the pitch is large, it can also cover a large range of the inner wall of the pipe.

[0027] When in use, the grooves and protrusions are arranged alternately on the inner wall of the pipe, so that both sides of each groove are protrusions, and both sides of each protrusion are grooves. The inner wall of the pipe is composed of protrusions and grooves. The water flow first enters the upper surface of the protrusion, then enters the two sides of the protrusion, and then enters the grooves on both sides of the protrusion. The water flow is first guided by the upper surface of the protrusion, and then when the water flow enters the grooves on both sides of the protrusion, the friction with the grooves reduces the flow speed, so that the flow speed of the water flow in the groove is less than the flow speed of the water flow on the upper surface of the protrusion. The water flow entering the groove does not reduce the speed loss too much under the guidance of the arc surface, so that this solution can not only guide the water, but also reduce the flow of water, making the water flow more stable.

[0028] In other embodiments, the pitch of the thread in the inner wall of the pipe is larger, and the number of grooves and protrusions is relatively small, wherein the bottom surface of the groove is a large arc bottom surface, and the distance between the left and right sides of the groove is equal to the width of the top surface of the protrusion. This makes the guidance in the inner wall of the pipe belt relatively sparse. At this time, the water flow in the inner wall of the pipe is not only guided by the top surface of the groove, but also by the bottom surface of the groove. At this time, the side surface of the groove and the side surface of the protrusion still play a role in increasing the friction of the water flow and reducing the water flow. However, since the number of grooves is small, the effect of reducing the flow of water is less than that of the aforementioned embodiment.

[0029] When in use, the widths of the concave surface and the convex surface are designed to be relatively wide, and the number of the concave surface and the convex surface in the inner wall of the pipe does not exceed 4 respectively.

[0030] In other embodiments, the protrusion has an arc-shaped upper surface, so that the main contact surface of the protrusion and the water flow is arc-shaped, which is convenient for guiding the water flow and facilitating the water flow to flow to both sides of the protrusion, thereby improving the efficiency of reducing the flow of water. The two sides of the arc-shaped upper surface are connected to the side walls of the groove, so that the water flow is separated by the arc-shaped upper surface and flows directly to the side wall of the groove, so that the water flow is rubbed by the side wall of the groove faster, further reducing the flow rate of the water flow. The arc-shaped upper surface is an outward convex arc. The force on the inner wall of the pipeline is more uniform.

[0031] When in use, the water first flows to the upper surface of the protrusion. After the water contacts the arc-shaped upper surface, it is affected by the arc-shaped structure and flows to both sides of the arc-shaped upper surface. When the water flows to the edge of the arc-shaped upper surface, it contacts the connection between the groove and the protrusion, and then the water flows along the side wall of the groove into the groove. In this process, a friction force different from the direction of the water flow is generated between the side wall of the groove and the water flow, which reduces the speed of the water flow. Finally, the water flows into the groove and flows according to the direction of the groove.

[0032] In other embodiments, the number of the protrusions and the grooves is the same. In this case, the grooves and the protrusions are evenly arranged in the inner wall of the pipe. In this case, the pipe is a centrally symmetrical structure, which improves the stability of the water flow. The protrusions and the grooves together form the inner wall of the pipe. In this case, there is no original inner wall in the pipe, but the inner wall of the pipe is formed by the protrusions and the grooves. The inner side of the axial section of the inner wall of the pipe is a regular wave shape, so that the inner wall of the pipe is evenly stressed.

[0033] When in use, when water flows into the pipe, it reaches the upper surface of the protrusion and the groove at the same time. The water flowing into the groove is subject to the friction of the side wall of the groove, so the water flowing into the groove is guided by the groove on the one hand, and friction with the side wall of the groove on the other hand causes a decrease in the water flow speed. The water flowing that reaches the upper surface of the protrusion is directly guided by the upper surface of the protrusion and flows along the upper end surface of the protrusion.

[0034] In other embodiments, the protrusion includes a top surface and two side surfaces located on both sides of the top surface, wherein the top surface guides the water flow, and the side surfaces increase the friction between the water flow and the inner wall of the tube. The height of the side surfaces is less than the width of the top surface, so that the radius of the inner wall is larger, which is convenient for guiding the water flow.

[0035] When in use, when water flows into the pipe, the water first reaches the protrusion and contacts the top surface and two side surfaces of the protrusion. Then the water flow at the top surface of the protrusion is guided by the top surface of the protrusion and continues to flow along the extension direction of the top surface of the protrusion. The water flow at the side surface of the protrusion flows in the descending direction of the edge of the protrusion. At this time, the water flow is rubbed by the side surface of the protrusion, so that the water flow on the side surface of the protrusion is subjected to a friction force opposite to the direction of the water flow, thereby slowing down the water flow.

[0036] In other embodiments, the two side surfaces constitute the two side walls of the groove, and the two side walls of each groove are the side surfaces of different protrusions, so that the groove and the protrusion are interlaced and connected without gaps. The groove includes a bottom surface, and the bottom surface and the two side surfaces together constitute the groove, and the two side surfaces are respectively connected to the two sides of the bottom surface. The width of the bottom surface is slightly smaller than the width of the top surface. Thus, a large curved surface is formed, which is convenient for guiding the water flow.

[0037] When in use, when water flows to the convex part, in addition to being guided by the top surface of the convex part, the water flows into the groove through the side surface of the convex part. When there is water flow only on one side of the groove, the water flows into the groove through one side and contacts the two side surfaces successively. When the water flow completely fills the groove, the water flows along the side surface of the other side to reach the corresponding convex part, and then is guided by the upper end surface of the convex part. Since the width of the bottom surface is slightly smaller than the width of the top surface, the time it takes for the water flow to fill the groove is shorter than the time it takes for the water flow to cross the convex part, so that the water flow is guided by all the convex parts more quickly. The influence of the friction between the groove and the water flow on the water flow velocity is reduced, and the flow velocity in the pipeline is increased.

[0038] In other embodiments, the connection between the side and the bottom is provided with an arc, which reduces the collision of the water flow inside the groove and reduces the kinetic energy loss of the water flow in the groove. The center of the arc is connected to the intersection of the center lines of the side and the bottom, forming a curved surface, which is convenient for guiding and avoiding stress concentration.

[0039] During use, when water flows into the groove, the water flows along the side wall of the groove to the bottom surface of the groove, and when the water flows to the connection between the side and the bottom surface, the water flow is guided by the arc surface, making it easier for the water flow to flow to the center of the groove, avoiding the impact force toward the convex direction when the water flows to the connection between the side and the ground.

[0040] When water flows into the groove from one side, it is first guided by the curvature on one side to flow toward the center of the groove, and then, under the guidance of the curved surface in the center of the groove, it flows to the other side of the groove. When the water flows to the curvature on the other side, it is guided by the curvature on that side and flows along the side toward the protrusion on that side, thus avoiding the impact of the water on the protrusion on that side. By guiding the water flow through the curvatures at multiple locations in the groove, the kinetic energy loss of the water flow in the pipe is reduced, while ensuring the guidance of the water flow in the pipe, and at the same time, the friction of the water flow in the pipe can reduce the flow rate. This improves the durability of the pipe.

[0041] In other embodiments, the extension direction of the protrusion is the same as the extension direction of the groove, and the angle between the extension direction of the protrusion and the axis of the pipeline is less than 15 degrees. This achieves water guidance and increases the friction of the inner wall of the pipeline. This solution increases the drainage performance of the pipeline and improves the drainage stability and drainage rate in the drainage performance. It solves the problem of out-of-roundness caused by uneven distribution when there are fewer spiral ribs, so that the number of protrusions in the pipeline will not affect the out-of-roundness of the pipeline. It reduces the restrictions on pipelines in different application scenarios. And through the setting of grooves and protrusions, the problem of spiral marks on the outer wall caused by spiral ribs is solved. The outer wall of the pipeline will not be affected by the number of protrusions and the number of grooves.

[0042] In another embodiment, the present solution uses a concave-convex surface instead of a spiral rib, which has the following advantages: the cross section of a spiral rib is generally triangular, and a certain rib height is required to form a guide. When the rib height increases, stress concentration forms an out-of-roundness or shrinkage mark. The concave-convex surface uses a large curved surface as a guide for water flow. Although the guidance in a local area is not as strong as that of a spiral rib, it has a large area, and the difference between the concave surface and the convex surface also forms a certain height.

[0043] The width of the spiral ribs is relatively small. When the number of spiral ribs is small, most of them still use the original arc inner wall of the pipe. If the pitch is not reduced, the effect will be poor. The concave and convex surface is designed to be wider, and it can cover a large range of the inner wall of the pipe even when the pitch is larger. At this time, it not only has a guiding effect, but also has the effect of reducing water flow and increasing the friction of the inner wall of the pipe.

[0044] The reduced weight of the concave surface can be used on the convex bulge of the pipe wall, and the overall weight of the pipe does not increase. However, the weight of the spiral ribs needs to be increased.

[0045] These modifications or improvements made on the basis of the present utility model without departing from the spirit of the present utility model shall all fall within the scope of protection required by the present utility model.

Claims

1. A large flow spiral tube structure, characterized in that: include: Multiple grooves are arranged in parallel, the grooves are located on the inner wall of the pipe, and protrusions are provided between adjacent grooves; the angle between the groove extension direction and the axis of the pipe is less than 15 degrees, the grooves and protrusions are arranged in an array on the inner wall of the pipe, and the outer side of the inner wall of the pipe is connected to the outer wall of the cylindrical pipe.

2. A large flow spiral tube structure according to claim 1, characterized in that: Both sides of the groove are connected to the protrusion, and both sides of the groove and the protrusion share the same side wall. The bottom of the groove is an arc surface, and the arc surface is an inwardly concave surface.

3. A large flow spiral tube structure according to claim 1 or 2, characterized in that: The protrusion has an arc-shaped upper surface, both sides of the arc-shaped upper surface are connected to the side walls of the groove, and the arc-shaped upper surface is an outward convex arc.

4. A large flow spiral tube structure according to claim 3, characterized in that: The number of the protrusions and the number of the grooves are the same, and the protrusions and the grooves together form the inner wall of the pipe. The inner side of the axial section of the inner wall of the pipe is a regular wave shape.

5. A large flow spiral tube structure according to claim 2, characterized in that: The protrusion includes a top surface and two side surfaces located on both sides of the top surface, and the height of the side surfaces is smaller than the width of the top surface.

6. A large flow spiral tube structure according to claim 5, characterized in that: The two side surfaces constitute two side walls of the groove, and the groove includes a bottom surface, and the width of the bottom surface is smaller than the width of the top surface.

7. A large flow spiral tube structure according to claim 6, characterized in that: The connection between the side surface and the bottom surface is provided with an arc, and the center of the arc is connected to the intersection of the center lines of the side surface and the bottom surface.

8. The large flow spiral tube structure according to claim 1, characterized in that: The extending direction of the protrusion is the same as that of the groove, and the angle between the extending direction of the protrusion and the axis of the pipe is less than 15 degrees.

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