Multi-layer composite hot melting pipe fitting

Abstract

The utility model provides a multi-layer composite hot melting pipe fitting, and belongs to the technical field of pipe fittings. The problem that in the prior art, a polyethylene pipe fitting is poor in use reliability is solved. The multi-layer composite hot melting pipe fitting comprises an L-shaped pipe body, the pipe body comprises an inner core, a reinforcing layer and an anti-aging layer are sequentially composited on the outer side of the inner core, one end of the inner core, one end of the reinforcing layer and one end of the anti-aging layer are flush with each other and form an inserting end of the pipe body, and the other end of the inner core is connected with the anti-aging layer. The other end of the inner core and the other end of the reinforcing layer are also flush with each other and located on the inner side of the other end of the anti-aging layer, so that the anti-aging layer forms a socket end of the pipe body at the end. The pipe fitting has the advantage that the pipe fitting is more durable.

Description

Technical Field

[0001] This utility model belongs to the field of pipe fittings technology and relates to a multi-layer composite hot-melt pipe fitting. Background Technology

[0002] Pipe fittings are a general term for components in a piping system that serve functions such as connection, control, direction change, flow diversion, sealing, and support. Currently, polyethylene pipe fittings are widely used in urban water supply and drainage systems due to their lightweight, ease of processing, and low operating costs. However, since sewage in drainage systems inevitably contains pollutants, bacteria easily grow on the inner walls of polyethylene pipe fittings after a period of use, causing corrosion and significantly shortening their service life. Furthermore, exposure to sunlight and rain accelerates the aging of polyethylene pipe fittings, reducing their strength. Combined with the significant water flow impact at the fitting locations, this further shortens their lifespan, necessitating frequent maintenance and repairs, causing considerable inconvenience to residents. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a multi-layer composite hot-melt pipe fitting. The technical problem this invention aims to solve is how to make the pipe fitting more durable.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A multi-layer composite hot-melt pipe fitting includes an L-shaped pipe body, characterized in that the pipe body includes an inner core, and a reinforcing layer and an anti-aging layer are sequentially laminated on the outer side of the inner core. One end of the inner core, the reinforcing layer and the anti-aging layer are flush and form the insertion end of the pipe body. The other ends of the inner core and the reinforcing layer are also flush and located inside the other end of the anti-aging layer, so that the anti-aging layer forms the socket end of the pipe body at that end.

[0006] The inner core of this multi-layer composite hot-melt pipe fitting has antibacterial properties, thereby inhibiting bacterial growth and giving the fitting an antibacterial effect. The reinforcing layer improves the fitting's pressure and impact resistance, while the anti-aging layer slows down the aging process. Simultaneously, one end of the inner core, reinforcing layer, and anti-aging layer are flush and form the insertion end of the pipe body. When this insertion end is connected to the pipe, the pipe is connected to the anti-aging layer, meaning the pipe does not contact the inner core. The other end of the inner core and reinforcing layer are also flush and located inside the other end of the anti-aging layer to form the socket end of the pipe body. This allows the inner core and reinforcing layer to be concealed within the anti-aging layer, preventing damage to the inner core during the hot-melt process (with the pipe), thus making the fitting more durable.

[0007] In the aforementioned multi-layer composite hot-melt pipe fitting, the thickness of the anti-aging layer is greater than the thickness of the inner core, and a copper insert with internal threads is connected to the socket end of the pipe body. The greater thickness of the anti-aging layer facilitates the placement of the plug end and socket end at both ends of the anti-aging layer, and also facilitates the placement of the copper insert at the socket end. The copper insert can be threadedly connected to other components to achieve fastening and fixing functions, improve the connection force of the pipe fitting, make the connection point more secure, and facilitate easy assembly and disassembly.

[0008] In the aforementioned multi-layer composite hot-melt pipe fitting, the inner core, reinforcing layer, and anti-aging layer are cured and formed together using adhesives. This ensures a tighter bond between the inner core, reinforcing layer, and anti-aging layer, preventing gaps between the layers and ensuring the overall performance of the pipe fitting is maintained.

[0009] In the aforementioned multi-layer composite hot-melt pipe fitting, the adhesive is polyurethane adhesive. Polyurethane adhesive possesses excellent mechanical properties, including superior tensile strength, elongation, and tear resistance, which can further enhance the strength and toughness of the pipe fitting.

[0010] In the aforementioned multi-layer composite hot-melt pipe fitting, the inner core, reinforcing layer, and anti-aging layer are formed into an integral structure through injection molding. This results in fast and efficient pipe fitting production.

[0011] Compared with existing technologies, the advantages of this multi-layer composite hot-melt pipe fitting are as follows: The inner core of this multi-layer composite hot-melt pipe fitting has antibacterial function, thereby inhibiting bacterial growth and giving the pipe fitting an antibacterial effect. The reinforcing layer makes the pipe fitting more resistant to pressure and impact, while the anti-aging layer can slow down the aging rate of the pipe fitting. At the same time, when the pipe fitting is connected to the pipe, the pipe is connected to the anti-aging layer, that is, the pipe does not come into contact with the inner core of the pipe fitting. The other end of the inner core and the reinforcing layer are also flush and located inside the other end of the anti-aging layer to form the socket end of the pipe body. This makes the inner core and the reinforcing layer hidden inside the anti-aging layer, which can prevent the socket end of the pipe fitting from being damaged by the inner core of the pipe fitting during the hot-melt process (with the pipe), thus making the pipe fitting more durable. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the multi-layer composite hot-melt pipe fitting in Example 1.

[0013] Figure 2 This is a cross-sectional view of the multi-layer composite hot-melt pipe fitting in Example 1.

[0014] Figure 3 This is a three-dimensional structural diagram of the multi-layer composite hot-melt pipe fitting in Example 2.

[0015] In the diagram, 1 is the tube body; 2 is the inner core; 3 is the reinforcing layer; 4 is the anti-aging layer; 4a is the plug end; 4b is the socket end; and 5 is the copper insert. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] Example 1

[0018] A multi-layer composite hot-melt pipe fitting, as described in the reference Figure 1-2 The tube 1 is L-shaped and includes an inner core 2 with antibacterial function. A reinforcing layer 3 and an anti-aging layer 4 are sequentially laminated on the outer side of the inner core 2. One end of the inner core 2, the reinforcing layer 3 and the anti-aging layer 4 are flush and form the insertion end 4a of the tube 1. The other ends of the inner core 2 and the reinforcing layer 3 are also flush and located inside the other end of the anti-aging layer 4, so that the anti-aging layer 4 forms the socket end 4b of the tube 1 at that end.

[0019] Specifically, the inner core 2 is made of PPR material with added antibacterial masterbatch. Antibacterial masterbatch is a plastic masterbatch with added antibacterial agents, which release antibacterial agents into the product, thereby inhibiting bacterial growth. The reinforcing layer 3 is made of PPR material with added alloy materials or synthetic fiber materials, and the anti-aging layer 4 is made of PPR material with added titanium dioxide or carbon black. The addition of alloy materials or synthetic fiber materials in the reinforcing layer 3 significantly improves the strength of the pipe fitting, enabling it to withstand greater pressure and load, resulting in better pressure and impact resistance of the pipe fitting 1. The titanium dioxide or carbon black in the anti-aging layer 4 provides a light-shielding effect, slowing down the aging rate of the pipe fitting. Simultaneously, the PPR material resists corrosion from various chemicals, preventing rust or chemical corrosion, thus extending the service life of the pipe fitting.

[0020] In this embodiment, the preferred alloy material includes one of stainless steel, titanium alloy, and Hastelloy. The addition of alloy material can significantly improve the strength and hardness of the pipe fitting, enabling it to withstand greater pressure and load. The synthetic fiber material includes one of aramid, polyester, nylon, polyamide, and polyester. At the same time, the synthetic fiber material can be arranged in a cross-interval manner along the axis and circumference of the pipe body. The synthetic fiber material arranged along the axial direction of the pipe body can enhance the axial compressive strength of the pipe body, while the synthetic fiber material arranged along the circumference of the pipe body can enhance the circumferential compressive strength of the pipe body, thereby better enhancing the strength of the pipe fitting itself.

[0021] In this embodiment, the inner core 2, reinforcing layer 3, and anti-aging layer 4 are preferably cured and formed by adhesives, so that the inner core 2, reinforcing layer 3, and anti-aging layer 4 are more tightly bonded, avoiding gaps between the layers and affecting the overall performance of the pipe fitting; and preferably, the adhesive is polyurethane adhesive, which has excellent mechanical properties, such as tensile strength, elongation, and tear resistance, which can further improve the strength and toughness of the pipe fitting.

[0022] Example 2

[0023] This embodiment is basically the same in structure and principle as Embodiment 1, the difference being: (Refer to...) Figure 3 The thickness of the anti-aging layer 4 is greater than the thickness of the inner core 2. A copper insert 5 with internal threads is connected to the socket end 4b of the pipe body 1. The copper insert 5 can be threaded to other components to achieve the functions of fastening and fixing, and improve the connection force of the pipe 1, making the connection point more solid and easy to disassemble and assemble. At the same time, the copper insert 5 itself has good corrosion resistance and high strength, making the pipe more durable.

[0024] Example 3

[0025] This embodiment shares the same structure and principle as Embodiment 1, except that the inner core 2, reinforcing layer 3, and anti-aging layer 4 are integrally formed through injection molding. Specifically, the inner core 2 of the fitting is initially injection molded, cooled, and retained in the mold. The reinforcing layer 3 is then injected using a different injection unit, with temperature control promoting interlayer bonding. After cooling, it is retained in the mold. Next, the anti-aging layer 4 is injected using a different injection unit, with temperature control again promoting interlayer bonding. After cooling, it is demolded using an ejector system. If necessary, annealing is performed to eliminate internal stress, or surface treatment (plasma activation) is applied to enhance adhesion strength. It is important to note that local cooling is required after each injection molding process to prevent thermal deformation.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multilayer composite hot melt pipe fitting comprising a pipe body (1) in the form of an L, characterised in that, The tube body (1) includes an inner core (2). A reinforcing layer (3) and an anti-aging layer (4) are sequentially laminated on the outer side of the inner core (2). One end of the inner core (2), the reinforcing layer (3), and the anti-aging layer (4) are flush and form the insertion end (4a) of the tube body (1). The other ends of the inner core (2) and the reinforcing layer (3) are also flush and located inside the other end of the anti-aging layer (4), so that the anti-aging layer (4) forms the socket end (4b) of the tube body (1) at that end.

2. A multi-layer composite hot melt tubing according to claim 1, wherein, The thickness of the anti-aging layer (4) is greater than the thickness of the inner core (2), and a copper insert (5) with internal threads is connected to the socket end (4b) of the tube body (1).

3. A multi-layer composite hot melt pipe according to claim 1 or 2, characterized in that, The inner core (2), the reinforcing layer (3) and the anti-aging layer (4) are respectively cured and formed by adhesive.

4. A multi-layer composite hot-melt pipe fitting according to claim 3, characterized in that, The adhesive is a polyurethane adhesive.

5. A multi-layer composite hot melt tubing according to claim 1 or 2, wherein, The inner core (2), reinforcing layer (3) and anti-aging layer (4) are formed into an integral structure by injection molding.

Images