Soft and easy-to-bend gap five-layer pipe

Abstract

The utility model relates to a flexible and easy-to-bend gap five-layer pipe which is characterized by comprising a lining pipe, a flat steel wire spring layer is armored outside the lining pipe, flat steel wires of the flat steel wire spring layer are uniformly armored outside the lining pipe in a gap mode, a straight steel wire layer is arranged outside the flat steel wire spring layer, a reinforcing flat belt layer is arranged outside the straight steel wire layer, and the reinforcing flat belt layer is arranged outside the straight steel wire layer. A plastic-coated layer is arranged outside the reinforcing flat belt layer, the direction of the flat steel wire spring layer is right-handed rotation, the direction of the straight steel wire layer is left-handed rotation, and the direction of the reinforcing flat belt layer is right-handed rotation. Due to the arrangement of the armored flat steel wire spring layer, compared with a conventional structure, the gap five-layer pipe of the structure is excellent in bending performance and soft. After cutting, the lining pipe and the plastic coating layer have no obvious core shrinkage phenomenon, the steel wire has no obvious protruding phenomenon, and the assembling efficiency and the service life of the sheath pipe are guaranteed.

Description

Technical Field

[0001] The utility model relates to a soft and bendable gap five-layer tube. Background Art

[0002] The performance of ordinary reinforced pipe structures used in engineering vehicles can no longer meet higher requirements. At present, the sheath pipes used for engineering vehicle cables generally adopt armored structures, that is, on the basis of the original twisted steel wire layer (liner pipe + steel wire), a flat steel belt layer is wrapped again, and finally plastic coated.

[0003] Compared with the reinforced pipe cables used in ordinary environments, the cables used in engineering vehicles are not only larger in size, with an outer diameter generally above 16mm, but also need to cope with extremely complex operating environments, often accompanied by high temperature, high humidity, extremely cold climates, and harsh environments of more than 15 meters, which puts higher requirements on the bending, flexibility, sliding resistance, etc. of the sheath pipe. At present, the common problems in this field are: when the outer diameter is relatively large and the coating is thick, the sheath pipe is very hard and not easy to bend, wiring is difficult, and the inner liner pipe is prone to shrinkage, which affects the assembly efficiency and service life of the sheath pipe. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a soft and flexible gap five-layer pipe to ensure the assembly efficiency and service life of the sheath pipe.

[0005] The purpose of the utility model is achieved in this way:

[0006] A soft and easily bendable gap five-layer tube comprises an inner lining tube, a flat steel wire spring layer is armored outside the inner lining tube, the flat steel wire gaps of the flat steel wire spring layer are uniformly armored outside the inner lining tube, a straight steel wire layer is arranged outside the flat steel wire elastic layer, a reinforced flat belt layer is arranged outside the straight steel wire layer, a plastic coating layer is arranged outside the reinforced flat belt layer, the flat steel wire spring layer is right-handed, the straight steel wire layer is left-handed, and the reinforced flat belt layer is right-handed.

[0007] Preferably, the inner liner tube is a PTFE composite inner liner tube.

[0008] As a preference, the plastic coating layer is HDPE plastic coating.

[0009] As a preferred embodiment, the inner diameter of the lining tube is 4±0.1mm, the overall outer diameter after the armored flat steel wire spring layer is 6.3±0.1mm, the overall outer diameter after the straight steel wire layer is 7.9±0.1mm, and the overall outer diameter of a soft and flexible gap five-layer tube is 11±0.2mm.

[0010] As a preferred embodiment, the lay pitch of the flat tape of the reinforcing flat tape layer is 10±2 mm.

[0011] As a preference, the diameter of the straight steel wire layer is 0.8±0.02 mm.

[0012] As a preferred embodiment, the number of straight steel wires in the straight steel wire layer is 26.

[0013] As a preferred embodiment, the gap between the flat steel wires of the flat steel wire spring layer is 0.05-0.12 mm.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Due to the setting of the armored flat steel wire spring layer, the utility model has excellent bending performance and softness compared with conventional structures. After cutting, the inner liner and the plastic coating layer have no obvious shrinkage, and the steel wire has no obvious protrusion, which ensures the assembly efficiency and service life of the sheath pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural cross-sectional view of the utility model.

[0018] in:

[0019] Lined pipe 1

[0020] Flat wire spring layer 2

[0021] Straight wire layer 3

[0022] Reinforced flat belt layer 4

[0023] Plastic coating layer 5. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Referring to the accompanying drawings, the utility model relates to a soft and easy-to-bend gap five-layer tube, including an inner lining tube 1, wherein the inner lining tube 1 is a PTFE composite inner lining tube, wherein the inner lining tube 1 is externally armored with a flat steel wire spring layer 2, wherein the gaps between the flat steel wires of the flat steel wire spring layer 2 are uniformly armored outside the inner lining tube 1, and the gaps between the flat steel wires of the flat steel wire spring layer are 0.05-0.12mm, and a straight steel wire layer 3 is arranged outside the flat steel wire elastic layer 2, and a reinforced flat belt layer 4 is arranged outside the straight steel wire layer 3, and a plastic coating layer 5 is arranged outside the reinforced flat belt layer 4, and the plastic coating layer 5 is HDPE plastic coating.

[0026] The inner diameter of the inner lining tube 1 is 4±0.1mm, the overall outer diameter after the armored flat steel wire spring layer 2 is 6.3±0.1mm, the overall outer diameter after the straight steel wire layer 3 is provided is 7.9±0.1mm, and the overall outer diameter of a soft and flexible gap five-layer tube is 11±0.2mm. The flat belt lay pitch of the reinforced flat belt layer 4 is 10±2mm. The direction of the flat steel wire spring layer 2 is right-handed, the direction of the straight steel wire layer 3 is left-handed, the lay pitch is 72±8mm, and it is not loose after peeling 2cm. The direction of the reinforced flat belt layer 4 is right-handed, the strand diameter of the reinforced flat belt layer 4 is 9±0.2mm, and the lay pitch is 10±1mm. The diameter of the straight steel wire layer 3 is 0.8±0.02mm, and the number of straight steel wires in the straight steel wire layer 3 is 26.

[0027] The steel wires are all smooth steel wires. The ovality of the overall gap five-layer tube is ≤0.10mm.

[0028] Due to the setting of the armored flat steel wire spring layer, compared with the conventional structure, the intermittent five-layer pipe of this structure has excellent bending performance and is soft, and the minimum bending radius can reach 200mm. After cutting, there is no obvious core shrinkage of the liner pipe and the plastic coating layer, and the steel wire has no obvious protrusion phenomenon, and the shrinkage is no more than 2mm / m.

[0029] The above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A soft and flexible gap five-layer tube, characterized in that It includes an inner lining tube, a flat steel wire spring layer is armored outside the inner lining tube, the flat steel wire gaps of the flat steel wire spring layer are uniformly armored outside the inner lining tube, a straight steel wire layer is arranged outside the flat steel wire elastic layer, a reinforced flat belt layer is arranged outside the straight steel wire layer, a plastic coating layer is arranged outside the reinforced flat belt layer, the direction of the flat steel wire spring layer is right-handed, the direction of the straight steel wire layer is left-handed, and the direction of the reinforced flat belt layer is right-handed.

2. A soft and flexible gap five-layer tube according to claim 1, characterized in that The inner liner tube is a PTFE composite inner liner tube.

3. A soft and flexible gap five-layer tube according to claim 1, characterized in that The plastic coating layer is HDPE plastic coating.

4. A soft and flexible gap five-layer tube according to claim 1, characterized in that The inner diameter of the liner pipe is 4±0.1mm, the overall outer diameter after the armored flat steel wire spring layer is 6.3±0.1mm, the overall outer diameter after the straight steel wire layer is 7.9±0.1mm, and the overall outer diameter of a soft and flexible gap five-layer pipe is 11±0.2mm.

5. The soft and flexible gap five-layer tube according to claim 1, characterized in that The lay pitch of the reinforcing flat belt layer is 10±2mm.

6. The soft and flexible gap five-layer tube according to claim 1, characterized in that The diameter of the straight steel wire layer is 0.8±0.02mm.

7. The soft and flexible gap five-layer tube according to claim 1, characterized in that The number of straight steel wires in the straight steel wire layer is 26.

8. The soft and flexible gap five-layer tube according to claim 1, characterized in that The gap between the flat steel wires of the flat steel wire spring layer is 0.05-0.12mm.

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