Polytetrafluoroethylene composite hose

Abstract

The utility model provides a polytetrafluoroethylene composite hose, relates to the technical field of composite hoses, and aims to solve the technical problems of poor high temperature resistance, corrosion resistance and high pressure resistance of hoses in the prior art. A polytetrafluoroethylene composite hose comprises a hose body, metal connectors are connected to the two ends of the hose body respectively, the hose body sequentially comprises a polytetrafluoroethylene inner layer, a heat conduction layer, a basalt fiber woven layer, an elastic buffer layer and an outer protection layer from inside to outside, and mesh gaps of the basalt fiber woven layer are filled with the elastic buffer layer; through the overall synergistic effect of all the layers, the high temperature resistance, corrosion resistance and high pressure resistance of the polytetrafluoroethylene composite hose are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of composite hose, specifically refers to a kind of polytetrafluoroethylene composite hose. BACKGROUND

[0002] Oil delivery hose used in automobile and aviation, and medium pipeline used on vulcanization platform, must have high temperature resistance, corrosion resistance and high pressure resistance performance. But the hose pipeline used on the above-mentioned equipment at present is single-layer rubber pipe or polyethylene pipe. Due to the defects in structure and material, the high temperature resistance, corrosion resistance and high pressure resistance performance of these hoses cannot meet the needs. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model aims at providing a kind of polytetrafluoroethylene composite hose to solve the technical problems of poor high temperature resistance, corrosion resistance and high pressure resistance performance of the hose in the prior art.

[0004] To solve the above technical problems, the utility model provides a kind of polytetrafluoroethylene composite hose, which comprises a hose body, the both ends of the hose body are connected with metal joints, the hose body comprises polytetrafluoroethylene inner layer, heat conducting layer, basalt fiber woven layer, elastic buffer layer and outer protective layer from inside to outside in sequence, and the elastic buffer layer fills the mesh gap of basalt fiber woven layer.

[0005] After adopting the above structure, the polytetrafluoroethylene composite hose of the utility model has the following advantages: the polytetrafluoroethylene inner layer directly contacts with the delivery medium, uses its chemical inertness and low friction coefficient to provide strong acid / alkali corrosion resistance and low adhesion characteristics of medium, the heat conducting layer conducts heat along the axial direction, diffuses the heat of the polytetrafluoroethylene inner layer in a directional manner, and dissipates heat through the metal joints at both ends to avoid local thermal stress concentration, the basalt fiber woven layer provides bidirectional reinforcement to provide axial tensile strength and hoop compressive strength, and the woven mesh design allows the elastic buffer layer to penetrate and fill, forming a three-dimensional interlocking structure to improve the interlayer bonding strength, and the outer protective layer protects the hose from external mechanical damage; through the overall synergistic effect of each layer, the high temperature resistance, corrosion resistance and high pressure resistance performance of the polytetrafluoroethylene composite hose are improved.

[0006] As an improvement, the heat conducting layer is a corrugated graphene layer; by adopting this structure, the corrugated structure increases the effective heat dissipation area through geometric deformation, improves the axial heat conduction efficiency, and allows elastic deformation when the hose is bent to avoid cracking or delamination of the heat conducting layer, while eliminating the stress concentration points of planar materials to improve the bending fatigue life.

[0007] As improvement, the extending direction of the wrinkle of the heat conducting layer is at an angle of 30-60 degrees with the axial direction of the hose body; with this structure, the axial heat conduction efficiency along the inclined surface of the wrinkle is improved, meanwhile, part of the radial heat diffusion capacity is reserved, the local overheating is avoided, the shear stress self-compensation effect is generated when the hose is bent, and the interlayer shear strength in the bent state is improved.

[0008] As improvement, a plurality of grooves are distributed on the outer surface of the heat conducting layer, and a plurality of protrusions are distributed on the inner surface of the basalt fiber woven layer and engaged in the grooves; with this structure, the engagement strength between the heat conducting layer and the basalt fiber woven layer is improved.

[0009] As improvement, a plurality of heat dissipation fins are equidistantly arranged on the outer peripheral wall of each metal joint; with this structure, the heat dissipation effect at the metal joint is improved.

[0010] As improvement, the elastic buffer layer is made of hydrogenated butadiene-acrylonitrile rubber material.

[0011] As improvement, the outer protective layer is made of fluorine rubber.

[0012] As improvement, the hose body further comprises a stainless steel woven layer arranged between the elastic buffer layer and the outer protective layer; with this structure, the hoop compression strength and the axial tensile strength are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a sectional view of the utility model.

[0014] Figure 2 is Figure 1 is a local enlarged view of the middle A part.

[0015] Fig. 1 is a sectional view of the utility model. DETAILED DESCRIPTION

[0016] The utility model discloses a kind of polytetrafluoroethylene composite hoses, which is described in detail as follows.

[0017] As shown in Figures 1 to 2As shown, a polytetrafluoroethylene composite hose includes a hose body 1, both ends of which are connected with metal joints 2, the hose body 1 sequentially includes a polytetrafluoroethylene inner layer 11, a heat-conducting layer 12, a basalt fiber woven layer 13, an elastic buffer layer 14, a stainless steel woven layer 16 and an outer protective layer 15 from inside to outside, the elastic buffer layer 14 fills the mesh gap of the basalt fiber woven layer 13, the elastic buffer layer 14 is made of hydrogenated butadiene-acrylonitrile rubber material, and the outer protective layer 15 is made of fluororubber. Each layer is connected with the metal joint 2.

[0018] As shown, the heat-conducting layer 12 is a corrugated graphene layer, and the corrugation extension direction of the heat-conducting layer 12 forms an angle of 30°-60° with the axial direction of the hose body 1. In this embodiment, the corrugation extension direction of the heat-conducting layer 12 forms an angle of 60° with the axial direction of the hose body 1.

[0019] As shown in Figure 1 and Figure 2 As shown, a plurality of grooves 3 are distributed on the outer surface of the heat-conducting layer 12, and a plurality of protrusions 4 engaged in the grooves 3 are distributed on the inner surface of the basalt fiber woven layer 13, and the grooves 3 and the protrusions 4 are equidistantly distributed along the axial direction and the circumferential direction.

[0020] As shown in Figure 1 Each metal joint 2 is provided with a plurality of heat dissipation fins 5 equidistantly arranged along the circumferential direction on the outer peripheral wall.

[0021] In addition, the heat-conducting layer 12, that is, the corrugated graphene layer, adopts argon plasma treatment on the corrugated surface to generate oxygen-containing functional groups, thereby improving the interfacial bonding strength with adjacent layers. The stainless steel woven layer 16 is preformed and embedded between the elastic buffer layer 14 and the outer protective layer 15, and the elastic buffer layer 14 and the outer protective layer 15 are bonded by vulcanization.

[0022] The polytetrafluoroethylene inner layer 11 directly contacts the conveying medium, and utilizes its chemical inertness and low friction coefficient to provide strong acid / alkali corrosion resistance and low medium adhesion characteristics. The heat-conducting layer 12 conducts heat along the axial direction to directively diffuse the heat of the polytetrafluoroethylene inner layer 11 and dissipate the heat through the metal joints 2 at both ends, thereby avoiding local thermal stress concentration. The basalt fiber woven layer 13 provides bidirectional reinforcement to provide axial tensile strength and circumferential compressive strength, and the woven mesh design allows the elastic buffer layer 14 to permeate and fill, forming a three-dimensional interlocking structure to improve the interlayer bonding strength. The stainless steel woven layer 16 further improves the circumferential compressive strength and the axial tensile strength, and the outer protective layer 15 protects the hose from external mechanical damage. Through the overall synergistic effect of each layer, the performance of the polytetrafluoroethylene composite hose in terms of high temperature resistance, corrosion resistance and high pressure resistance is improved.

[0023] The embodiment of the utility model is explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned one embodiment, all other embodiments obtained by the person skilled in the art without making the creative labor belong to the range of protection of the utility model.

Claims

1. A polytetrafluoroethylene composite hose, characterized by, The utility model relates to a kind of flexible pipes, including hose body (1), metal joint (2) is connected at both ends of the hose body (1), the hose body (1) includes polytetrafluoroethylene inner layer (11) from inside to outside, heat-conducting layer (12), basalt fiber woven layer (13), elastic buffer layer (14) and outer protective layer (15), the elastic buffer layer (14) fills the mesh gap of basalt fiber woven layer (13).

2. The polytetrafluoroethylene composite hose according to claim 1, characterized by The heat-conducting layer (12) is a corrugated graphene layer.

3. The polytetrafluoroethylene composite hose according to claim 2, characterized by The corrugation extension direction of the heat-conducting layer (12) forms an angle of 30°-60° with the axial direction of the hose body (1).

4. The polytetrafluoroethylene composite hose according to claim 1, characterized by The outer surface of the heat-conducting layer (12) is provided with a plurality of grooves (3), and the inner surface of the basalt fiber woven layer (13) is provided with a plurality of protrusions (4) engaged in the grooves (3).

5. The polytetrafluoroethylene composite hose according to claim 1, characterized by Each of the metal joints (2) is provided with a plurality of heat dissipation fins (5) equidistantly arranged on the outer peripheral wall in the circumferential direction.

6. The polytetrafluoroethylene composite hose according to claim 1, characterized by The elastic buffer layer (14) is made of hydrogenated butadiene-acrylonitrile rubber material.

7. The polytetrafluoroethylene composite hose according to claim 1, characterized by The outer protective layer (15) is made of fluororubber.

8. The polytetrafluoroethylene composite hose according to claim 1, characterized by The hose body (1) further includes a stainless steel woven layer (16) disposed between the elastic buffer layer (14) and the outer protective layer (15).

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