HDPE (high-density polyethylene) silicon core pipe with outer buffer structure

Abstract

The utility model discloses a high-density polyethylene (HDPE) silicon core pipe with an outer buffer structure, which comprises an HDPE pipe body, an insulating layer, a reinforcing layer, a hollow interlayer and a buffer structure, the insulating layer is arranged on the outer surface of the HDPE pipe body, a flame-retardant layer is arranged on the inner surface of the HDPE pipe body, a wear-resistant layer is arranged on the outer surface of the insulating layer, the reinforcing layer is arranged on the outer surface of the wear-resistant layer, and the hollow interlayer is arranged on the outer surface of the wear-resistant layer. An anti-impact layer is arranged on the outer surface of the reinforcing layer, the hollow interlayer is arranged between the reinforcing layer and the anti-impact layer, and the buffering structure is arranged in an inner cavity of the hollow interlayer. According to the HDPE silicon core pipe with the outer buffer structure, the reinforcing layer and the anti-impact layer are of a double-layer buffer structure, so that multi-layer protection is provided for the HDPE silicon core pipe, the influence of external pressure and extrusion on the pipe can be effectively borne, impact force is dispersed through cooperation of the buffer structure between the reinforcing layer and the anti-impact layer, and the service life of the pipe is prolonged. And direct action on the pipe body is avoided, and the influence on the pipeline is reduced, so that the risk of pipeline deformation and fracture is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of HDPE silicon core pipes, in particular to a HDPE silicon core pipe with an external buffer structure. Background Art

[0002] HDPE silicone core pipe is a new type of composite pipe with silicone solid lubricant on the inner wall. It has good sealing performance, chemical corrosion resistance, low engineering cost, and is widely used in optical cable communication network systems such as highways and railways. HDPE silicone core pipe is extruded and compounded by three plastic extruders simultaneously. The main raw material is high-density polyethylene, and the core layer is silicone solid lubricant with the lowest friction coefficient.

[0003] For example, the patent document with application number 201921496680.5 discloses a high-pressure HDPE silicon-core tube, including a pipe body, wherein the pipe body includes a silica gel layer and a high-density polyethylene layer from the inside to the outside, and a buffer layer, a reinforcement layer, a wear-resistant layer and an anti-seepage layer are arranged outside the high-density polyethylene layer in sequence, and a plurality of buffer structures are evenly arranged in the buffer layer, and a plurality of support plates are arranged in the reinforcement layer; a sub-tube head is arranged at one end of the pipe body, and a mother-tube head is arranged at the other end, and the sub-tube head can be detachably connected to the mother-tube head of another pipe body. The structure design of this utility model is reasonable, and an anti-seepage layer is added to the silicon-core tube to increase the waterproof function of the silicon-core tube, and prevent the silicon-core tube from being located underground for a long time and the tube body from being corroded and damaged; a reinforcement layer and a buffer structure are provided on the tube body to increase the pressure resistance and buffering capacity of the silicon-core tube; the external mother-and-child tube heads are used, and each silicon-core tube can be connected without using a casing.

[0004] Similar HDPE silicone-core pipes are often affected by external forces such as extrusion and collision during transportation. A single buffer layer cannot provide sufficient energy absorption and the ability to disperse the extrusion force in the pipeline. External extrusion or collision will cause the pipeline to deform and rupture, thereby affecting the normal transportation and use of the pipeline.

[0005] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a HDPE silicon core tube with an external buffer structure is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a HDPE silicone core pipe with an external buffer structure. During the transportation of the HDPE silicone core pipe, the pipe is often affected by external forces such as extrusion and collision. A single buffer layer cannot provide sufficient energy absorption and the ability to disperse the extrusion force in the pipe. The pipe will be deformed and ruptured by external extrusion or collision, which will affect the normal transportation and use of the pipe.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a HDPE silicon core tube with an external buffer structure, comprising a HDPE tube body, an insulating layer, a reinforcement layer, a hollow interlayer and a buffer structure, characterized in that: the insulating layer is arranged on the outer surface of the HDPE tube body, the inner surface of the HDPE tube body is provided with a flame retardant layer, the inner surface of the flame retardant layer is provided with an antistatic layer, the inner wall of the antistatic layer is provided with a moisture-proof coating, the outer surface of the insulating layer is provided with an anti-wear layer, the reinforcement layer is arranged on the outer surface of the anti-wear layer, the outer surface of the reinforcement layer is provided with an impact-resistant layer, the hollow interlayer is arranged between the reinforcement layer and the impact-resistant layer, and the buffer structure is arranged in the inner cavity of the hollow interlayer.

[0008] Furthermore, the HDPE pipe body and the insulating layer are bonded to each other by hot melting, and the insulating layer is made of polyethylene.

[0009] Furthermore, the reinforcement layer is made of polyurethane, the impact-resistant layer is made of polyvinyl chloride, and the reinforcement layer and the impact-resistant layer form a double-layer buffer structure.

[0010] Furthermore, the inner cavity of the hollow interlayer is provided with a buffer structure, the buffer structure is in the shape of a plurality of honeycomb-shaped holes, and the angle between each side length of the buffer structure is 120 degrees.

[0011] Furthermore, flame retardant particles are arranged on the surface of the flame retardant layer. The flame retardant particles are arranged in a plurality of dot-like shapes at equal intervals, and the flame retardant layer is physically bonded to the flame retardant particles.

[0012] Furthermore, the antistatic layer is made of conductive polyethylene, the moisture-proof coating is made of epoxy resin, and the surface of the anti-wear layer is made of rubber.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the reinforcement layer and the impact-resistant layer form a double-layer buffer structure, thereby providing multi-layer protection for the HDPE silicon core pipe, which can effectively withstand the impact of external pressure and extrusion on the pipeline, and the buffer structure cooperates between the reinforcement layer and the impact-resistant layer to disperse the impact force, avoid direct action on the pipe body, reduce the impact on the pipeline itself, and thus reduce the risk of pipeline deformation and rupture. The specific contents are as follows:

[0014] A buffer structure is provided to further absorb and disperse external impact force and reduce the impact on the pipeline. The honeycomb hole shape has good buffering and energy absorption performance, which can effectively absorb external impact and vibration, avoid direct action on the inside of the pipeline, improve the impact resistance of the pipeline, and reduce the impact on the pipeline, thereby forming an external buffer protection on the outside of the HDPE silicone core pipe.

[0015] A reinforcement layer and an impact-resistant layer are provided. The reinforcement layer made of polyurethane material can effectively prevent the pipeline from being deformed or damaged when subjected to external pressure or extrusion. The impact-resistant layer made of polyvinyl chloride material absorbs and disperses external impact force, reducing the impact on the pipeline. By setting a double-layer buffer structure composed of a reinforcement layer and an impact-resistant layer, a buffer is performed on the outside of the HDPE silicon-core pipe, which can effectively improve the compressive strength and impact resistance of the HDPE silicon-core pipe, so that the pipeline has better structural strength and stability, can withstand external pressure and impact, and can also reduce external impact and extrusion on the pipeline during transportation, handling and installation, reduce the risk of pipeline damage, and protect the silicon core and other important components inside the pipeline from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a three-dimensional cross-sectional structure of a HDPE silicon core tube with an external buffer structure according to the utility model;

[0017] Figure 2 This is a side view structural schematic diagram of a HDPE silicon core tube with an external buffer structure of the utility model;

[0018] Figure 3 The utility model is a HDPE silicon core pipe with an external buffer structure Figure 1 A local enlarged structural diagram of the part;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of a HDPE silicon core tube with an external buffer structure of the utility model.

[0020] In the figure: 1. HDPE pipe body; 2. Insulation layer; 3. Reinforcement layer; 4. Hollow interlayer; 41. Buffer structure; 5. Impact-resistant layer; 6. Flame-retardant layer; 61. Flame-retardant particles; 7. Anti-static layer; 71. Moisture-proof coating; 8. Anti-wear layer. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] like Figures 1 to 4As shown, a HDPE silicone core pipe with an external buffer structure includes a HDPE pipe body 1, an insulating layer 2, a reinforcement layer 3, a hollow interlayer 4 and a buffer structure 41. The insulating layer 2 is arranged on the outer surface of the HDPE pipe body 1. The inner wall of the HDPE pipe body 1 is provided with a new type of composite pipe with a silicone solid lubricant, and has good sealing performance. The HDPE pipe body 1 and the insulating layer 2 are bonded to each other by hot melting. The material of the insulating layer 2 is polyethylene. The insulating layers 2 are bonded to each other by hot melting, and the pipe is insulated to prevent leakage caused by contact between the conductor and the outside world, and the pipe is protected from the influence of the external environment. The inner surface of the body 1 is provided with a flame retardant layer 6, which will undergo a carbonization reaction at high temperature to form a carbonized layer. This carbonized layer can isolate the contact between the material surface and the flame, and prevent the further spread of the flame. The surface of the flame retardant layer 6 is provided with flame retardant particles 61, which are arranged in a plurality of dot-shaped and equidistant manners. The flame retardant layer 6 and the flame retardant particles 61 are physically combined. The dot-shaped arranged flame retardant particles 61 can increase the physical combination between the flame retardant particles 61 and the flame retardant layer 6, providing a more stable and reliable flame retardant effect. Through the dot-shaped arrangement, a plurality of discrete flame retardant points are formed to prevent the spread of fire.

[0023] The reinforcement layer 3 is arranged on the outer surface of the anti-wear layer 8. The material of the reinforcement layer 3 is polyurethane. The reinforcement layer 3 enhances the structural strength and stability of the pipeline to prevent the pipeline from being deformed or damaged when it is subjected to external pressure or extrusion. The outer surface of the reinforcement layer 3 is provided with an impact-resistant layer 5. The material of the impact-resistant layer 5 is polyvinyl chloride. The impact-resistant layer 5 made of polyvinyl chloride absorbs and disperses external impact force, reduces the impact on the pipeline, and protects the internal structure of the pipeline from damage. The reinforcement layer 3 and the impact-resistant layer 5 form a group of double-layer buffer structures. The hollow interlayer 4 is arranged between the reinforcement layer 3 and the impact-resistant layer 5. The buffer structure 41 is arranged in the inner cavity of the hollow interlayer 4. The inner cavity of the hollow interlayer 4 is provided with the buffer structure 41. The buffer structure 41 is in the shape of a plurality of honeycomb holes, and the angle between each side length of the buffer structure 41 is 120 degrees. The hexagonal honeycomb hole-shaped buffer structure 41 with an angle of 120 degrees can effectively absorb external impact and vibration, reduce the impact on the pipeline, play a buffering role, and protect the internal components of the pipeline from damage.

[0024] The inner surface of the flame retardant layer 6 is provided with an antistatic layer 7. The material of the antistatic layer 7 is conductive polyethylene. The antistatic layer 7 made of conductive polyethylene has good conductivity, can effectively release static electricity, and ensure the safe operation of the pipeline. The inner wall of the antistatic layer 7 is provided with a moisture-proof coating 71. The material of the moisture-proof coating 71 is epoxy resin. The moisture-proof coating 71 made of epoxy resin prevents the inside of the pipeline from getting damp, keeps the inside of the pipeline dry, prevents moisture from corroding and damaging the pipeline material, and extends the service life of the pipeline. The outer surface of the insulating layer 2 is provided with an anti-wear layer 8. The surface of the anti-wear layer 8 is made of rubber material, which increases the wear resistance and durability of the pipeline and reduces the impact of friction between the pipeline and the line.

[0025] In summary, if Figures 1 to 4 As shown, the HDPE silicon core tube with an external buffer structure, the HDPE tube body 1 and the insulating layer 2 are bonded to each other by hot melt, so as to insulate and protect the HDPE tube body 1. When combustion occurs, the flame retardant layer 6 will undergo a carbonization reaction under high temperature combustion to form a carbonized layer, and through the point-arranged flame retardant particles 61, a plurality of discrete flame retardant points are formed to prevent the further spread of the flame. The reinforcement layer 3 and the impact-resistant layer 5 together form a group of double-layer buffer structures, so as to provide buffer protection for the HDPE tube body 1, and the honeycomb-shaped buffer structure 41 between the hollow interlayers 4 cooperates with each other to further absorb external shocks and vibrations, thereby playing a buffering role together. The anti-static layer 7 of conductive polyethylene material releases the static electricity inside the tube body, and the moisture-proof coating 71 of epoxy resin material is used to protect the inside of the pipeline in contact with the line from moisture, so as to keep it dry. The anti-wear layer 8 is blocked between the reinforcement layer 3 and the insulating layer 2, so as to avoid the external buffer parts from acting on the pipeline and causing damage.

Claims

1. A HDPE silicon core pipe with an external buffer structure, comprising a HDPE pipe body (1), an insulating layer (2), a reinforcement layer (3), a hollow interlayer (4) and a buffer structure (41), characterized in that: The insulating layer (2) is arranged on the outer surface of the HDPE pipe body (1); the inner surface of the HDPE pipe body (1) is provided with a flame retardant layer (6); the inner surface of the flame retardant layer (6) is provided with an antistatic layer (7); the inner wall of the antistatic layer (7) is provided with a moisture-proof coating (71); the outer surface of the insulating layer (2) is provided with an anti-wear layer (8); the reinforcement layer (3) is arranged on the outer surface of the anti-wear layer (8); the outer surface of the reinforcement layer (3) is provided with an anti-impact layer (5); the hollow interlayer (4) is arranged between the reinforcement layer (3) and the anti-impact layer (5); and the buffer structure (41) is arranged in the inner cavity of the hollow interlayer (4).

2. The HDPE silicon core tube with an external buffer structure according to claim 1, characterized in that: The HDPE pipe body (1) and the insulating layer (2) are bonded to each other by hot melting, and the insulating layer (2) is made of polyethylene.

3. The HDPE silicon core tube with an external buffer structure according to claim 1, characterized in that: The material of the reinforcement layer (3) is polyurethane, the material of the impact-resistant layer (5) is polyvinyl chloride, and the reinforcement layer (3) and the impact-resistant layer (5) form a double-layer buffer structure.

4. The HDPE silicon core tube with an external buffer structure according to claim 1, characterized in that: The inner cavity of the hollow interlayer (4) is provided with a buffer structure (41), the buffer structure (41) is in the shape of a plurality of honeycomb-shaped holes, and the angle between each side length of the buffer structure (41) is 120 degrees.

5. The HDPE silicon core tube with an external buffer structure according to claim 1, characterized in that: The surface of the flame retardant layer (6) is provided with flame retardant particles (61), the flame retardant particles (61) are arranged in a plurality of dot-like and equidistant manner, and the flame retardant layer (6) and the flame retardant particles (61) are physically bonded.

6. The HDPE silicon core tube with an external buffer structure according to claim 1, characterized in that: The material of the antistatic layer (7) is conductive polyethylene, the material of the moisture-proof coating (71) is epoxy resin, and the surface of the anti-wear layer (8) is made of rubber.

Images