High-ductility PVC-U pipe fitting

Abstract

This utility model discloses a high-toughness PVC-U pipe fitting, including a direct body and pipe joints disposed at both ends of the direct body. The inner wall of the pipe joints is provided with adhesive wall-hanging grooves. The surface of the direct body is provided with multiple folded expansion grooves along the axial direction. Tie bars are pre-embedded inside the direct body, parallel to the axis, and multiple tie bars are equidistantly arranged along the circumference of the direct body. This utility model improves adhesive adhesion by providing adhesive wall-hanging grooves on the inner wall of the pipe joints, thereby increasing the bonding strength and reducing the risk of adhesive separation and decreased sealing. By providing folded expansion grooves on the surface of the direct body, the wall thickness is reduced at the location of the folded expansion grooves, and the bending deformation space is increased, thereby improving the toughness of the direct body, reducing internal stress accumulation after installation, delaying aging damage, and extending service life, thus improving practicality.

Description

Technical Field

[0001] This utility model relates to the field of PVC pipe fittings technology, specifically a high-toughness PVC-U pipe fitting. Background Technology

[0002] PVC-U pipe fittings, also known as rigid PVC pipe fittings, are composed of amorphous thermoplastic resin made from vinyl chloride monomer through polymerization, plus certain additives (such as stabilizers, lubricants, and fillers). Generally, due to their high rigidity and poor toughness, PVC-U pipe fittings are more difficult to install and connect pipes. Furthermore, after installation, the different lengths and installation locations of the two connected pipes make the fitting more susceptible to varying external forces from both pipes, leading to problems such as adhesive separation, decreased sealing, accelerated aging and damage, and a shortened service life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-toughness PVC-U pipe fitting, which solves the problems of high hardness and poor toughness of PVC-U pipe fittings, which easily lead to adhesive separation, reduced sealing performance, accelerated aging and damage of the pipe fittings, and shortened service life after installation.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A high-toughness PVC-U pipe fitting includes a direct body and pipe joints disposed at both ends of the direct body. The inner wall of the pipe joint is provided with an adhesive wall-hanging groove. The surface of the direct body is provided with multiple folded expansion grooves along the axial direction. Tie bars are pre-embedded inside the direct body. The tie bars are parallel to the axis and are multiple and equidistantly arranged along the circumference of the direct body.

[0006] Preferably, the pipe fitting and the direct body are an integral structure, and the inner diameter of the direct body is smaller than the inner diameter of the pipe fitting.

[0007] Preferably, the adhesive wall-hanging groove is an annular groove, and the adhesive wall-hanging groove has multiple rings and is equidistantly arranged along the axial direction of the pipe joint.

[0008] Preferably, the folding telescopic groove is an annular groove with an acute angle in cross-section.

[0009] Preferably, the distance between two adjacent folding and telescopic grooves in the middle region of the direct body is less than the distance between two adjacent folding and telescopic grooves in the regions near the two ends of the direct body.

[0010] Preferably, the folding telescopic groove is symmetrically arranged on the direct body along the bisecting lines of the direct body.

[0011] Preferably, the number of the tie rods is odd and not less than five.

[0012] Preferably, a ring-shaped rib is also vertically embedded at the positions corresponding to both ends of the tie rod inside the direct body, and the tie rod is fixedly connected to the ring-shaped rib.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention improves adhesive adhesion by setting an adhesive wall groove on the inner wall of the pipe joint, thereby increasing the bonding strength and reducing the risk of adhesive separation and reduced sealing. By setting a folding expansion groove on the surface of the main body, the wall thickness is reduced and the bending deformation space is increased, thereby improving the toughness of the main body, reducing the accumulation of internal stress after installation, delaying aging damage and extending service life, thus improving practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a top cross-sectional view of the corresponding position of the annular rib of this utility model;

[0018] Figure 4 This is a top view of the corresponding position of the folding telescopic groove of this utility model.

[0019] In the diagram: 1. Main body; 101. Folding expansion groove; 2. Pipe joint; 201. Glue wall groove; 3. Tie bar; 4. Circular rib. Detailed Implementation

[0020] 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.

[0021] like Figure 1-4 As shown, this utility model provides a technical solution: a high-toughness PVC-U pipe fitting, including a direct body 1 and pipe joints 2 disposed at both ends of the direct body 1. The pipe joints 2 and the direct body 1 are an integral structure, and the inner diameter of the direct body 1 is smaller than the inner diameter of the pipe joints 2. The two are integrally formed in one piece during production to ensure the overall structural strength.

[0022] The inner wall of the pipe joint 2 is provided with an adhesive wall groove 201. The adhesive wall groove 201 is an annular groove with multiple rings and is equidistantly arranged along the axial direction of the pipe joint 2. This helps to improve the adhesion and wall hanging effect of the adhesive during installation, increase the bonding strength, and reduce the risk of adhesive separation and reduced sealing performance.

[0023] The surface of the direct body 1 is provided with multiple rings of folding expansion grooves 101 along the axial direction. The folding expansion grooves 101 are annular grooves with acute angles in cross-section, which not only reduces the wall thickness but also increases the bending deformation space, thereby improving the toughness of the direct body 1 and reducing the accumulation of internal stress after installation. The distance between two adjacent rings of folding expansion grooves 101 in the middle region of the direct body 1 is smaller than the distance between two adjacent rings of folding expansion grooves 101 in the regions near the two ends of the direct body 1. The folding expansion grooves 101 are symmetrically arranged on the direct body 1 along the bisecting lines of the direct body 1.

[0024] The main body 1 has pre-embedded tie rods 3 inside. The tie rods 3 are parallel to the axis. There are multiple tie rods 3, which are equidistant from each other along the circumference of the main body 1. The number of tie rods 3 is odd and not less than five. At the positions corresponding to the two ends of the tie rods 3, there are also vertically pre-embedded ring ribs 4 inside the main body 1. The tie rods 3 and the ring ribs 4 are fixedly connected to improve the tensile strength.

Claims

1. A high-toughness PVC-U pipe fitting, comprising a direct body (1) and pipe fittings (2) disposed at both ends of the direct body (1), characterized in that: The inner wall of the pipe joint (2) is provided with an adhesive wall groove (201), and the surface of the direct body (1) is provided with multiple folding expansion grooves (101) along the axial direction. The direct body (1) is pre-embedded with tie rods (3), which are parallel to the axis. There are multiple tie rods (3) and they are equidistantly arranged along the circumference of the direct body (1).

2. The high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The pipe connector (2) and the direct body (1) are an integral structure, and the inner diameter of the direct body (1) is smaller than the inner diameter of the pipe connector (2).

3. The high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The glue wall groove (201) is an annular groove, and the glue wall groove (201) has multiple rings and is equidistantly arranged along the axial direction of the pipe joint (2).

4. A high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The folding telescopic groove (101) is an annular groove with an acute angle in cross-section.

5. A high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The distance between two adjacent folding expansion grooves (101) in the middle region of the direct body (1) is less than the distance between two adjacent folding expansion grooves (101) in the region near both ends of the direct body (1).

6. A high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The folding telescopic groove (101) is symmetrically arranged on the direct body (1) along the bisecting line of the direct body (1).

7. A high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The number of the tie rods (3) is odd and not less than five.

8. A high-toughness PVC-U pipe fitting according to claim 1, characterized in that: The internal structure (1) is also vertically embedded with ring ribs (4) at both ends of the tie rod (3), and the tie rod (3) and the ring rib (4) are fixedly connected.

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