Internal-impact-resistant drainage pipe fitting for building

Abstract

The utility model discloses an internal-impact-resistant drainage pipe fitting for a building, and solves the problem of water leakage caused by the fact that a traditional plastic drainage pipe fitting is easy to wear and crack under the impact of hard objects such as cement slurry, stones and metal scraps. The plastic pipe is composed of an inner layer, a middle layer, an outer layer and reinforcing ribs, and the outer layer and the reinforcing ribs are made of the same plastic. Through the design of a multi-layer composite structure, impact energy can be efficiently absorbed, and the impact of hard objects on the inner wall is reduced; the variable cross-section design of the reinforcing ribs can uniformly transmit impact force, strengthen the bonding strength and enhance the non-deformability; the outer layer can be made of different materials, different connection modes such as hot melting butt joint, electric melting connection and adhesive connection with the drainage pipeline can be achieved, the drainage system which can resist internal impact and is high in strength and good in sealing performance is finally formed, the maintenance cost is reduced, and the reliability and durability of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to drainage pipe fitting technical field especially relates to a building is used to endure internal impact drainage pipe fitting. BACKGROUND

[0002] In the building drainage system, plastic drainage pipe fitting is widely applied because of its low cost, convenient installation and other advantages. However, in the actual drainage process, especially in the early stage of construction site delivery and the period of large-scale concentrated decoration of owners, hard objects such as cement slag, stone, metal scrap and the like are often mixed in drainage. These hard objects impact the inner wall of the plastic drainage pipe fitting at high speed along with water flow, and ordinary plastic drainage pipe fitting is difficult to withstand such high-intensity internal impact. Under the long-term action, the inner wall of the pipe fitting is prone to wear and tear, and further causes water leakage problem. This not only affects the normal operation of the drainage system, causes waste of water resources, but also may threaten the structural safety of the building, and cause serious consequences such as wall corrosion, foundation settlement and the like. Once such problems occur, the maintenance work is not only cumbersome, but also needs to consume a large amount of manpower, material resources and time cost. Therefore, the development of a plastic drainage pipe fitting capable of effectively resisting internal impact becomes the key to solving the current drainage system problem. SUMMARY

[0003] In order to achieve the above purpose, the utility model provides a building is used to endure internal impact drainage pipe fitting, solves the situation that the traditional plastic drainage pipe fitting is easy to wear and tear under the impact of hard objects such as cement slag, stone, metal scrap and the like, and causes water leakage problem.

[0004] The technical scheme of the utility model is a building is used to endure internal impact drainage pipe fitting, which comprises a three-layer composite structure, the three-layer composite structure is divided into an inner layer, an intermediate layer and an outer layer, a plurality of reinforcing ribs are uniformly distributed on the outer surface of the outer layer along the axial direction, the reinforcing rib adopts variable cross-section design, and is in the shape of trapezoidal structure with wide upper part and narrow lower part, so that the pressure borne by the bottom of the pipe fitting can be better coped with, stress concentration can be avoided, pressure can be effectively dispersed, pipe fitting rupture caused by local pressure concentration can be prevented, and the anti-deformation capacity of the whole pipe fitting can be further enhanced.

[0005] Further, the inner layer is a polyurethane elastomer, has good wear resistance and corrosion resistance, the intermediate layer is a nitrile rubber, has good elasticity and can absorb external impact energy, the outer layer is a plastic layer, has high strength and the characteristics of convenient connection, maintains the stability of the whole pipe fitting structure and long-term use performance, and the reinforcing rib is integrally formed with the outer layer and is made of the same material.

[0006] Further, the outer layer is connected by selecting adhesive, hot melting or electric melting according to the different materials, construction is convenient, and the interface is reliable.

[0007] The utility model has the advantages that

[0008] 1. The utility model discloses a building is used to the drainage pipe fitting of internal impact resistance, solved the traditional plastic drainage pipe fitting under the hard thing such as cement slag, stone, metal scrap impact, easy to appear the situation of wearing and tearing, cause the water leakage problem.

[0009] 2. The utility model discloses a building is used to the drainage pipe fitting of internal impact resistance, can high -efficiently absorb impact energy through multilayer composite structure design, reduce the impact of hard thing to the inner wall, the variable cross -section design of reinforcing rib can evenly transfer impact force, strengthen the bonding strength, enhance the deformation resistance, the outer layer can select different material, can realize and drainage pipeline hot melt butt joint, electric melting connection, adhesive connection different connection mode, finally form the drainage system of resistance internal impact, high strength, good sealing, reduce maintenance cost, improve system reliability and durability. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structural diagram of the utility model;

[0011] Figure 2 It is the structural diagram of reinforcing rib 4;

[0012] Mark explanation: inner layer -1; intermediate layer -2; outer layer -3, reinforcing rib -4. DETAILED DESCRIPTION

[0013] In order to further illustrate the technical means and effects taken by the utility model to achieve the predetermined purpose, the following is combined with the preferred embodiments, the specific implementation mode, structure, features and effects according to the utility model are explained in detail as follows.

[0014] As shown in Figure 1 , Figure 2 The building is used to the drainage pipe fitting of internal impact resistance provided by the utility model, which is composed of an inner layer 1, an intermediate layer 2, an outer layer 3 and a reinforcing rib 4, the outer layer 3 and the reinforcing rib 4 are made of the same plastic.

[0015] The inner layer 1 is a polyurethane elastomer, which has good wear resistance and corrosion resistance.

[0016] The intermediate layer 2 is a butadiene-acrylonitrile rubber, which has good elasticity and can absorb external impact energy.

[0017] The outer layer 3 is a plastic layer made of PVC-U, PP or HDPE, which has high strength and convenient connection characteristics, giving the entire pipe structure stability and long-term use performance. A plurality of reinforcing ribs 4 are uniformly distributed on the outer surface of the outer layer along the axial direction. The reinforcing rib can better cope with the large pressure borne by the bottom, further enhancing the overall deformation resistance of the pipe.

[0018] The reinforcing rib 4 is designed in variable cross-section, in the shape of a trapezoidal structure with the upper width being wider than the lower width. The upper bottom width is 3-10 mm, the lower bottom width is 1-5 mm, and the height is 2-5 mm. When the pipe is impacted, the impact force can be transmitted more evenly through the trapezoidal structure of the reinforcing rib, avoiding stress concentration, effectively dispersing the pressure, and preventing the pipe from breaking due to local pressure concentration.

[0019] The reinforcing rib 4 is integrally formed with the outer layer 3 and has the same material as the outer layer, which can be PVC-U, PP, or HDPE.

[0020] The outer layer 3 can be connected by adhesive, hot melt, or electric melting according to the different materials, which is convenient for construction and reliable for the interface.

[0021] The specific molding process is as follows:

[0022] 1. Inner layer molding: Select high-quality polyurethane elastomer raw materials and process them into a tubular inner layer 1 that fits the inner diameter of the pipe through extrusion molding process. Strictly control the process parameters during extrusion to ensure uniform thickness of the inner layer.

[0023] 2. Middle layer molding and inner layer compounding: Put the prepared polyurethane elastomer inner layer 1 into a specially designed mold, and inject nitrile rubber material into the gap between the mold and the inner layer through injection molding process to form a middle layer 2 with buffering function. During injection, ensure that the nitrile rubber is fully filled and tightly adheres to the inner layer 1 without bubbles, gaps, or other defects, to ensure that the buffer layer can effectively play a buffering role.

[0024] 3. Outer layer molding and middle layer compounding: Put the prepared middle layer 2 into a specially designed mold, and use PVC-U material as the outer layer 3 through injection molding process. Before injection, mix and plasticize the PVC-U raw material. Then, inject the plasticized PVC-U material into the gap between the mold and the middle layer, strictly control the temperature, pressure, and time parameters to ensure uniform thickness of the outer layer. The mold has protrusions and grooves that can form a tooth-like engagement structure at the position corresponding to the reinforcing rib 4, which synchronously forms the outer wall axial trapezoidal structure reinforcing rib 4, ensuring that the reinforcing rib is firmly combined with the outer layer 3, and the trapezoidal cross-sectional size of the reinforcing rib near the bottom meets the design requirements, so that the PVC-U outer layer is tightly connected with the already compounded inner layer and middle layer as a whole. If PP or HDPE material is used as the outer layer 3, due to the different shrinkage rates and flowabilities of different materials, the mold structure and process parameters need to be optimized during injection molding to ensure the size accuracy and quality of the outer layer 3, meeting the design requirements.

[0025] 4. Pipe connection: if the outer layer 3 is made of PVC-U material, the pipe connection part needs to be cleaned, polished and treated to increase the surface roughness and improve the adhesion of the adhesive. If the outer layer 3 is made of PP or HDPE material, hot melt butt joint or electric melting connection can be used. When hot melt butt joint is used, the pipe port needs to be cut flat and perpendicular to the axis to ensure that the port is free of burrs; after the port is processed, it should be avoided to be contaminated to prevent affecting the hot melt effect. The port also needs to be smooth to ensure the butt joint quality. If electric melting connection is used, the pipe connection end needs to ensure the size accuracy, tightly cooperate with the respective electric melting sleeve, and the connection end surface is clean without oil stains and impurities to ensure the electric melting welding effect.

[0026] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application to obtain equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A building-use drainage pipe fitting resistant to internal impact, characterized in that: The structure includes a three-layer composite structure, which is divided into an inner layer (1), a middle layer (2) and an outer layer (3). Several reinforcing ribs (4) are evenly distributed along the axial direction on the outer surface of the outer layer (3). The reinforcing ribs (4) adopt a variable cross-section design and have a trapezoidal structure that is wider at the top and narrower at the bottom. The inner layer (1) is a polyurethane elastomer. The middle layer (2) is nitrile rubber. The outer layer (3) is a plastic layer. The reinforcing ribs (4) are integrally formed with the outer layer (3) and are made of the same material as the outer layer.

2. The building-use internal impact resistant drainage pipe fitting as described in claim 1, characterized in that: The outer layer (3) is connected by adhesive, hot melt or electrofusion depending on the material.

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