Split mounting type flame-retardant plastic pipe

Abstract

The utility model discloses an assembly type flame-retardant plastic pipe, which relates to the technical field of plastic pipes and comprises an inner pipeline, an outer pipeline is arranged outside the inner pipeline, one end of the inner pipeline is connected with an inner thread ring, and the outer wall of the inner thread ring is meshed with the inner wall of the other inner pipeline in a threaded manner. The end, connected with the inner thread ring, of the inner pipeline is located on the outer side of the inner thread ring and connected with an outer thread ring, and the inner wall of the outer thread ring is meshed with the outer wall of the other outer pipeline in a threaded mode. By rotating the pipelines, the inner pipeline (1) is meshed with the inner thread ring (4) in a threaded mode, the outer pipeline (2) is meshed with the outer thread ring (5) in a threaded mode, connection of the two pipelines is completed, and further connection of the two pipelines is completed along with rotation of the fixing bolt (7). The braid layers (3) located in the inner pipeline (1) and the outer pipeline (2) can improve the flexibility and impact resistance of the pipeline, when the pipeline is burnt by flames, the shape of the pipeline is maintained, and normal use of the pipeline is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipes, in particular to an assembled flame-retardant plastic pipe. Background Art

[0002] Assembled flame-retardant plastic pipes have been widely used in many fields due to their unique flame-retardant properties and easy installation: In the construction industry, flame-retardant plastic pipes can be used inside buildings, in wire and cable ducts and other places to effectively prevent the spread of fire and reduce losses. At the same time, they can also be used for pipe connections in building facilities such as flues and exhaust ducts, and have the advantages of good fire resistance, safety and reliability; in the power industry, in the power system, flame-retardant plastic pipes are an important component of cables, lines, poles and towers and other facilities. Their good flame retardancy and corrosion resistance can ensure the safe operation of the power system; in the petrochemical industry, flame-retardant plastic pipes can be used in the petrochemical industry to prevent corrosion and explosion of equipment such as pipelines and storage tanks, and play a key role.

[0003] Flame retardant plastic pipe is a plastic material with flame retardant properties. It can slow down or prevent the spread of flames under certain conditions. When exposed to a fire source, this plastic can resist combustion or at least significantly slow down the burning rate. The flame retardant properties of flame retardant plastics are usually achieved by adding flame retardants to the plastic substrate. Flame retardants can release substances that can inhibit the spread of flames when the plastic is heated, such as halogen compounds, phosphorus compounds or metal oxides. These substances effectively reduce the spread of flames and the intensity of combustion by capturing free radicals, diluting combustible gases or forming thermal insulation barriers.

[0004] Currently, the connection of plastic pipes on the market generally adopts hot melt connection and direct sleeve connection and reinforcement. However, hot melt connection cannot be used for pipelines under high temperature and pressure, and the operation technology requirements are high, requiring professional equipment. The connection strength of direct sleeve connection and reinforcement is low and easy to loosen. In addition, flame retardant plastic pipes can meet the purpose of flame retardancy due to material reasons, but plastic pipes will soften after being heated, resulting in reduced strength, and under the action of the pressure inside the pipe, the heated part will be damaged, affecting the normal use of the plastic pipe. Therefore, an assembled flame retardant plastic pipe is designed that is easy to install and can still maintain normal operation when combustion is required. Utility Model Content

[0005] Based on this, the purpose of the present invention is to provide an assembled flame-retardant plastic pipe to solve the technical problems that traditional plastic pipes are complicated to connect and cannot maintain normal operation after being heated.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an assembled flame-retardant plastic pipe, comprising an inner pipe, an outer pipe being arranged outside the inner pipe, one end of the inner pipe being connected to an inner threaded ring, and the outer wall of the inner threaded ring being threadedly engaged with the inner wall of another group of inner pipes, one end of the inner pipe being connected to the inner threaded ring being located on the outside of the inner threaded ring and being connected to an outer threaded ring, and the inner wall of the outer threaded ring being threadedly engaged with the outer wall of another group of outer pipes.

[0007] By adopting the above technical solution, the pipes are rotated so that the inner pipe is threadedly engaged with the inner thread ring and the outer pipe is threadedly engaged with the outer thread ring, thereby completing the assembly connection of the two pipes.

[0008] The utility model is further configured such that a threaded block is connected to the end of the outer surface of the outer pipe away from the external threaded ring, and a fixing bolt is threadedly sleeved on the outer wall of the threaded block and the outer wall of the corresponding external threaded ring, and the inner thread of the fixing bolt is in the opposite direction to the inner thread of the external threaded ring.

[0009] By adopting the above technical solution, after the two pipes are initially fixed, the fixing bolt is rotated so that the fixing bolt engages with the external thread ring and the threaded block at the same time, and the further connection of the two pipes is completed as the fixing bolt rotates.

[0010] The present invention is further configured such that the inner wall of the internal threaded ring is connected to a plurality of support blocks.

[0011] By adopting the above technical solution, the support block provides support for the internal thread ring, so that the internal thread ring can always maintain close contact with the inner pipe during use, preventing leakage from occurring at the connection between the two pipes.

[0012] The present invention is further configured such that the material of the inner pipe is polyethylene, a braided layer is provided between the inner pipe and the outer pipe, and the material of the braided layer is glass fiber, and the material of the outer pipe is polyvinyl chloride.

[0013] By adopting the above technical solution, the braided layer located inside the inner pipe and the outer pipe can improve the flexibility and impact resistance of the pipe. When the pipe is burned by flame, the outer pipe exerts its flame retardant properties. At this time, the strength of the inner pipe and the outer pipe is temporarily reduced due to heat. At this time, the softened or even melted outer pipe and inner pipe adhere to the braided layer, maintaining the shape of the pipe and ensuring that the appearance of the inner pipe and the outer pipe does not change significantly after cooling. In addition, the braided layer can also provide protection for the pipe when the pipe is partially softened, thereby not affecting the normal use of the pipe.

[0014] In summary, the present invention has the following beneficial effects:

[0015] The utility model completes the assembly connection of the two pipes by rotating the pipes so that the inner pipe (1) is threadedly engaged with the inner threaded ring (4) and the outer pipe (2) is threadedly engaged with the outer threaded ring (5). The fixing bolt (7) is rotated so that the fixing bolt (7) is simultaneously engaged with the outer threaded ring (5) and the threaded block (6). As the fixing bolt (7) rotates, the further connection of the two pipes is completed. The braided layer (3) located in the inner pipe (1) and the outer pipe (2) can improve the flexibility and impact resistance of the pipes. When the pipes are burned by flames, the braided layer maintains the shape of the pipes, ensuring that the appearance of the inner pipe (1) and the outer pipe (2) does not change significantly after cooling. In addition, the braided layer can also provide protection for the pipes when the pipes are partially softened, thereby not affecting the normal use of the pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a side first half cross-sectional schematic diagram of the overall structure of the utility model;

[0018] Figure 3 It is a side second half cross-sectional schematic diagram of the overall structure of the utility model;

[0019] Figure 4 It is a transverse cross-sectional schematic diagram of the present invention.

[0020] In the figure: 1. Inner pipe; 2. Outer pipe; 3. Braided layer; 4. Internal thread ring; 5. External thread ring; 6. Threaded block; 7. Fixing bolt; 8. Support block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] The following describes an embodiment of the present invention based on its overall structure.

[0023] An assembled flame retardant plastic pipe, such as Figure 1-4 As shown, it includes an inner pipe 1, an outer pipe 2 is arranged on the outside of the inner pipe 1, one end of the inner pipe 1 is connected to an internal threaded ring 4, and the outer wall of the internal threaded ring 4 is threadedly engaged with the inner wall of another group of inner pipes 1, and the end of the inner pipe 1 connected to the internal threaded ring 4 is located on the outside of the internal threaded ring 4 and is connected to an external threaded ring 5, and the inner wall of the external threaded ring 5 is threadedly engaged with the outer wall of another group of outer pipes 2. The pipes are rotated so that the inner pipe 1 is threadedly engaged with the internal threaded ring 4, and the outer pipe 2 is threadedly engaged with the external threaded ring 5, completing the assembly and connection of the two pipes.

[0024] A threaded block 6 is connected to the end of the outer surface of the outer pipe 2 away from the external threaded ring 5, and a fixing bolt 7 is threadedly sleeved on the outer wall of the threaded block 6 and the outer wall of the corresponding external threaded ring 5. The internal thread of the fixing bolt 7 is opposite to the internal thread of the external threaded ring 5. After the two pipes are initially fixed, the fixing bolt 7 is rotated so that the fixing bolt 7 engages with the external threaded ring 5 and the threaded block 6 at the same time, and as the fixing bolt 7 rotates, the further connection of the two pipes is completed.

[0025] The inner wall of the internal thread ring 4 is connected to a number of support blocks 8, which provide support for the internal thread ring 4 so that the internal thread ring 4 can always maintain close contact with the inner pipe 1 during use to prevent leakage at the connection between the two pipes.

[0026] The material of the inner pipe 1 is polyethylene, and a braided layer 3 is provided between the inner pipe 1 and the outer pipe 2, and the material of the braided layer 3 is glass fiber, and the material of the outer pipe 2 is polyvinyl chloride. The braided layer 3 located in the inner pipe 1 and the outer pipe 2 can improve the flexibility and impact resistance of the pipe. When the pipe is burned by flame, the outer pipe 2 plays a flame retardant role. At this time, the strength of the inner pipe 1 and the outer pipe 2 is temporarily reduced due to heat. At this time, the softened or even melted outer pipe 2 and the inner pipe 1 are adhered to the braided layer 3, maintaining the shape of the pipe, ensuring that the appearance of the inner pipe 1 and the outer pipe 2 does not change significantly after cooling, and the braided layer (3) can also provide protection for the pipe when the pipe is partially softened, thereby not affecting the normal use of the pipe.

[0027] Working principle: The utility model rotates the pipeline so that the inner pipeline 1 is threadedly engaged with the inner threaded ring 4, and the outer pipeline 2 is threadedly engaged with the outer threaded ring 5, thereby completing the assembly connection of the two pipelines. The fixing bolt 7 is rotated so that the fixing bolt 7 is engaged with the outer threaded ring 5 and the threaded block 6 at the same time, and the further connection of the two pipelines is completed as the fixing bolt 7 rotates. The support block 8 provides support for the inner threaded ring 4, so that the inner threaded ring 4 can always maintain close contact with the inner pipeline 1 during use, preventing leakage at the connection between the two pipelines, and is located inside The braided layer 3 inside the pipe 1 and the outer pipe 2 can improve the flexibility and impact resistance of the pipe. When the pipe is burned by flame, the outer pipe 2 plays a flame retardant role. At this time, the strength of the inner pipe 1 and the outer pipe 2 is temporarily reduced due to heat. At this time, the softened or even melted outer pipe 2 and the inner pipe 1 are adhered to the braided layer 3, maintaining the shape of the pipe and ensuring that the appearance of the inner pipe 1 and the outer pipe 2 does not change significantly after cooling. In addition, the braided layer (3) can also provide protection for the pipe when the pipe is partially softened, thereby not affecting the normal use of the pipe.

[0028] On the basis of the above structure, in this embodiment, although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and it is not a limitation of the utility model. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, replacements and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An assembled flame-retardant plastic pipe, comprising an inner pipe (1), characterized in that: An outer pipe (2) is provided outside the inner pipe (1); one end of the inner pipe (1) is connected to an inner threaded ring (4), and the outer wall of the inner threaded ring (4) is threadedly engaged with the inner wall of another group of inner pipes (1); one end of the inner pipe (1) connected to the inner threaded ring (4) is located outside the inner threaded ring (4) and is connected to an outer threaded ring (5), and the inner wall of the outer threaded ring (5) is threadedly engaged with the outer wall of another group of outer pipes (2).

2. The assembled flame-retardant plastic pipe according to claim 1, characterized in that: A threaded block (6) is connected to one end of the outer surface of the outer pipe (2) away from the outer threaded ring (5), and a fixing bolt (7) is threadedly sleeved on the outer wall of the threaded block (6) and the outer wall of the corresponding outer threaded ring (5), and the inner thread of the fixing bolt (7) is in the opposite direction to the inner thread of the outer threaded ring (5).

3. The assembled flame-retardant plastic pipe according to claim 2, characterized in that: The inner wall of the internal thread ring (4) is connected to a plurality of support blocks (8).

4. The assembled flame-retardant plastic pipe according to claim 1, characterized in that: The material of the inner pipe (1) is polyethylene.

5. The assembled flame-retardant plastic pipe according to claim 1, characterized in that: A braided layer (3) is provided between the inner pipe (1) and the outer pipe (2), and the material of the braided layer (3) is glass fiber.

6. The assembled flame-retardant plastic pipe according to claim 1, characterized in that: The material of the outer pipe (2) is polyvinyl chloride.

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