PVC-U drainage elbow structure

Abstract

The utility model relates to the technical field of PVC pipe fittings, and discloses a PVC-U drainage elbow structure which comprises a drainage pipe body, drainage pipe bending parts are arranged at the two ends of the drainage pipe body, annular reinforcing ribs are arranged on the outer sides of the two drainage pipe bending parts, a plurality of strip-shaped reinforcing ribs are arranged on the outer sides of the drainage pipe bending parts, and the strip-shaped reinforcing ribs are arranged on the outer sides of the drainage pipe bending parts. Spiral flow guide fins are arranged on the inner wall of the drainage pipe body, the bending angle of the drainage pipe bending part is 90 + / -0.5 degrees, the curvature radius of the drainage pipe bending part is 1.2-1.8 times of the diameter, the section of the annular reinforcing rib is of a trapezoid structure, the bottom width of the trapezoid is 3-5 mm, and the top width of the trapezoid is 1.5-2.5 mm. According to the PVC-U drainage elbow, through the composite structure of the annular reinforcing ribs and the strip-shaped reinforcing ribs and the combination of the spiral flow guide fins on the inner wall of the pipe, the ring stiffness and the external force deformation resistance of the PVC-U drainage elbow are remarkably improved, meanwhile, the water flow resistance is effectively reduced, and the drainage efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PVC pipe fitting technical field especially relates to a PVC-U drainage elbow structure. BACKGROUND

[0002] At present, along with the advancement of urbanization, the construction and reconstruction demand of drainage system is increasing, PVC-U drainage pipe has been widely applied in the field of building drainage, urban drainage, chemical wastewater treatment etc. PVC-U material has good chemical stability, corrosion resistance and lower cost, becomes the ideal material of drainage pipe. However, the traditional PVC-U drainage pipe often faces the problems of big water flow resistance at the turning place, insufficient structural rigidity, poor connection sealing property etc. in actual use, which limits its application performance.

[0003] For the above-mentioned related application of drainage pipe, the existing PVC-U drainage elbow in the market mostly adopts single reinforcing rib or simple bending design, trying to enhance the thickness or material strength of the elbow to improve its performance. However, these conventional designs often fail to effectively solve the balance problem of water flow resistance and structural strength. More importantly, the existing drainage elbow structure mostly lacks comprehensive flow guide design, so that the water flow often appears turbulent when passing through the elbow, increasing the fluid resistance and energy loss, thereby affecting the overall efficiency of the drainage system.

[0004] In view of the above problems, a PVC-U drainage elbow structure is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides a PVC-U drainage elbow structure, which aims to solve the problems of big water flow resistance, insufficient structural rigidity and poor sealing performance of the existing PVC-U drainage elbow structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a PVC-U drainage elbow structure, comprising a drainage pipe main body, both ends of the drainage pipe main body are provided with drainage pipe bending parts, and the outer sides of the two drainage pipe bending parts are provided with annular reinforcing ribs, and the outer side of the drainage pipe bending part is provided with a plurality of strip reinforcing ribs, and the inner wall of the drainage pipe main body is provided with spiral flow guide fins.

[0007] As a further description of the above technical scheme:

[0008] The bending angle of the drainage pipe bending part is 90°±0.5°, and the curvature radius is 1.2 times the diameter to 1.8 times the diameter.

[0009] As a further description of the above technical scheme:

[0010] The annular reinforcing rib is in a trapezoidal structure, the base width of the trapezoid is 3-5 mm, the top width is 1.5-2.5 mm, and the angle between the axis of the annular reinforcing rib and the axis of the drain pipe body is 10°-20°.

[0011] As a further description of the above technical solution:

[0012] The number of the strip-shaped reinforcing ribs is 6 and the strip-shaped reinforcing ribs are uniformly distributed in the circumference, the section height of a single strip-shaped reinforcing rib is 2-3 mm, and the width is 4-6 mm.

[0013] As a further description of the above technical solution:

[0014] The flow guide angle of the spiral flow guide fin is 20°-30°.

[0015] As a further description of the above technical solution:

[0016] The annular reinforcing rib is internally provided with a gluing groove, and the depth of the gluing groove is 6-10 mm, and the groove width is 2-3 mm.

[0017] As a further description of the above technical solution:

[0018] The inner side of the drain pipe bending part is provided with a rubber ring groove, and the cross section of the rubber ring groove is semicircular, and the diameter is 2.5-3.5 mm.

[0019] As a further description of the above technical solution:

[0020] The annular reinforcing rib is internally provided with a Ni-Ti memory alloy ring.

[0021] The utility model has the advantages of:

[0022] 1、The utility model discloses a composite reinforcing structure of annular reinforcing rib and strip-shaped reinforcing rib, and a spiral flow guide fin arranged on the inner wall of the pipe, which significantly improves the ring stiffness of the PVC-U drain elbow, effectively enhances the anti-external force deformation ability, and the spiral flow guide fin can guide the water flow to flow along the spiral path stably, thereby effectively reducing the water flow resistance and improving the drainage efficiency.

[0023] 2、The utility model discloses a double sealing structure composed of a gluing groove and a rubber ring groove arranged on the bending part of the drain pipe by introducing a Ni-Ti memory alloy ring, which not only enhances the sealing performance of the connection, but also significantly improves the sealing stability of the device in a wide temperature range. The memory alloy ring has the ability to deform at the phase transition temperature, can actively compensate the size change of the PVC-U material due to thermal expansion, and effectively prolongs the service life of the drain elbow. DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of a PVC-U drainage elbow structure proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the Ni-Ti shape memory alloy ring in a PVC-U drainage elbow structure proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the spiral guide fins of a PVC-U drainage elbow structure proposed in this utility model.

[0027] Legend:

[0028] 1. Main body of the drain pipe; 12. Bending part of the drain pipe; 2. Annular reinforcing rib; 21. Adhesive groove; 22. Rubber ring groove; 3. Strip reinforcing rib; 4. Spiral guide fin; 5. Ni-Ti shape memory alloy ring. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 - Figure 3The utility model provides an embodiment: a PVC-U drainage elbow structure, including drainage pipe main body 1, both ends of drainage pipe main body 1 are equipped with drainage pipe bending part 12, the bending angle of bending part is preferably 90 DEG + 0.5 DEG, and the curvature radius is set as 1.2 times to 1.8 times of drainage pipe diameter, to guarantee the smooth transition of fluid in the process of drainage turning, avoid local turbulence to produce, to improve the structural strength of drainage elbow under external force, the outside of drainage pipe bending part 12 is equipped with annular reinforcing rib 2 and multiple strip reinforcing rib 3, annular reinforcing rib 2 is along the circumferential distribution of drainage pipe bending part 12, and its cross section shape is trapezoidal, and the base width of trapezoidal is 3 to 5 millimeters, and the top width is 1.5 to 2.5 millimeters, and the axis of annular reinforcing rib 2 and the axis of drainage pipe main body 1 form 10 to 20 inclination, to improve the deformation resistance of drainage pipe elbow under stress state in structure, the number of strip reinforcing rib 3 is 6, and is evenly distributed along the circumference of drainage pipe bending part 12, and the cross section height of each strip reinforcing rib 3 is 2 to 3 millimeters, and the width is 4 to 6 millimeters, and with annular reinforcing rib 2, it forms a three-dimensional reinforcing structure, and the ring stiffness and compression resistance of elbow are improved significantly, to improve drainage efficiency, a plurality of spiral flow guide fins 4 are arranged on the inner wall of drainage pipe main body 1, and the flow guide angle is controlled between 20 to 30, can effectively guide the uniform flow of water flow along the spiral direction, reduce the turbulence and energy loss of fluid at elbow, to reduce flow resistance, improve drainage capacity, in the connection sealing structure aspect, the inside of annular reinforcing rib 2 is provided with adhesive groove 21, and the depth of groove is 6 to 10 millimeters, and the width is 2 to 3 millimeters, is used to fill special PVC adhesive, improves the sealing and firmness of bonding connection, in addition, the inner side of drainage pipe bending part 12 is also provided with rubber ring groove 22, and the cross section of rubber ring groove 22 is semicircular, and its diameter is controlled between 2.5 to 3.5 millimeters, is used to accommodate rubber sealing ring, further improves the watertight performance of interface connection, to enhance the adaptability of drainage elbow in changeable environment, the inside of annular reinforcing rib 2 is also embedded with Ni-Ti memory alloy ring 5, utilizes its phase shape memory characteristic, when PVC-U thermal expansion and cold shrinkage caused by temperature change, can through the automatic deformation behavior of Ni-Ti memory alloy ring 5 to compensate the gap at the joint, to keep the stability of sealing structure under wide temperature range, effectively prolongs the service life of drainage pipe.

[0031] Working principle: during use, fluid first enters from one end of the drain pipe body 1, and is diverted by the drain pipe bending part 12 arranged at both ends to flow along the helical flow guide fins 4 on the inner wall of the drain pipe, forming a spiral path, and is discharged from the other end after passing through the curved channel. A plurality of annular reinforcing ribs 2 and strip-shaped reinforcing ribs 3 are arranged outside the drain pipe bending part 12 to form rigid support in the overall structure. A Ni-Ti memory alloy ring 5 is embedded inside the annular reinforcing rib 2, which forms a sealing connection system with the rubber ring groove 22 arranged inside the drain pipe bending part 12 and the adhesive groove 21 opened inside the annular reinforcing rib 2, wherein the rubber ring groove 22 is used to install a rubber sealing ring, and the adhesive groove 21 is used to fill adhesive, and the three work together to realize connection and sealing. In the overall structure, the drain pipe body 1, the drain pipe bending part 12, the annular reinforcing rib 2, the strip-shaped reinforcing rib 3, the helical flow guide fin 4, the Ni-Ti memory alloy ring 5, the adhesive groove 21 and the rubber ring groove 22 are fixedly connected in the form of injection molding or plug-in sealing to form a complete drainage guiding system.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A PVC-U drainage elbow structure, comprising a drainage pipe body (1), characterized in that: Both ends of the main body of the drain pipe (1) are provided with drain pipe bends (12), and both outer sides of the two drain pipe bends (12) are provided with annular reinforcing ribs (2), and the outer sides of the drain pipe bends (12) are provided with multiple strip reinforcing ribs (3). The inner wall of the main body of the drain pipe (1) is provided with spiral guide fins (4).

2. The PVC-U drainage elbow structure according to claim 1, characterized in that: The bending angle of the bend (12) of the drain pipe is 90°±0.5°, and its radius of curvature is 1.2 to 1.8 times the diameter.

3. The PVC-U drainage elbow structure according to claim 1, characterized in that: The cross-section of the annular reinforcing rib (2) is trapezoidal, with a base width of 3-5mm and a top width of 1.5-2.5mm. The angle between the axis of the annular reinforcing rib (2) and the axis of the main body of the drainage pipe (1) is 10°-20°.

4. The PVC-U drainage elbow structure according to claim 1, characterized in that: The number of strip reinforcing ribs (3) is 6 and they are evenly distributed around the circumference. The cross-sectional height of each strip reinforcing rib (3) is 2-3 mm and the width is 4-6 mm.

5. The PVC-U drainage elbow structure according to claim 1, characterized in that: The guiding angle of the spiral guide fin (4) is 20°-30°.

6. The PVC-U drainage elbow structure according to claim 1, characterized in that: The annular reinforcing rib (2) has an adhesive groove (21) inside, and the depth of the adhesive groove (21) is 6-10mm and the width of the groove is 2-3mm.

7. The PVC-U drainage elbow structure according to claim 1, characterized in that: The inner side of the bend (12) of the drain pipe is provided with a rubber ring groove (22), and the cross section of the rubber ring groove (22) is semi-circular with a diameter of 2.5-3.5mm.

8. The PVC-U drainage elbow structure according to claim 1, characterized in that: The annular reinforcing rib (2) is provided with a Ni-Ti shape memory alloy ring (5).

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