Pressure-resistant and hydrolysis-resistant TPU (thermoplastic polyurethane) fire hose

Abstract

The pressure-resistant and hydrolysis-resistant TPU fire hose comprises an inner layer and an outer layer made of a twill braided tube, the inner layer is a pressure-resistant hose made of a TPU material, a middle layer capable of improving the pressure resistance and hydrolysis resistance of the fire hose is further arranged between the outer layer and the inner layer, the outer wall of the middle layer is fixed to the outer layer in an adhesive mode, and the outer layer is made of a thermoplastic polyurethane (TPU) material. And the inner wall of the middle layer is bonded and fixed with the inner layer. The fire hose has the advantages that the middle layer is added and is pressure-resistant and hydrolysis-resistant, so that the pressure-resistant and hydrolysis-resistant performance of the fire hose is improved, and the service life of the fire hose is prolonged; the inner layer is made of the TPU material, and the TPU material has good pressure resistance and hydrolysis resistance, so that the service life of the fire hose is further prolonged; the middle layer is provided with three layers, the inner layer is high in strength, resistant to hydrolysis and high in rebound resilience, the outer layer is good in tensile property and resistant to corrosion and abrasion, the net-shaped cloth can make full contact with the inner layer and the outer layer, the inner layer and the outer layer are tightly combined, and the overall connection firmness degree of the middle layer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a fire hose made of pressure-resistant and hydrolysis-resistant TPU. Background Art

[0002] There is a Chinese invention patent application with the application number CN201310150672.6 and the name "Ultra-high pressure fire hose" which discloses that a fire hose is composed of a three-layer structure. The inner layer is a polyurethane rubber tube, the middle layer is a twill woven tube with 2 up and 1 down, and the outer layer is a twill woven tube with 2 up and 2 down. This invention adopts a three-layer structure, greatly improving the pressure resistance of the product, which can withstand the ultra-high pressure fire water source of 6.0 MPa, and is mainly applied to high-pressure fire trucks for urban high-rise fire fighting water conveyance above 300 meters. Due to the adoption of a twill woven tube with 2 up and 1 down in the middle layer and a twill woven tube with 2 up and 2 down in the outer layer, the product has certain flexibility and wear resistance while having pressure resistance, which is beneficial for turning, corner folding and transformation of use, convenient for extending into different parts to improve the fire fighting efficiency, reduce the labor intensity of operators, and also beneficial for extending the service life of the product. However, there is still room for improvement in the pressure resistance and hydrolysis resistance of this fire hose, so the structure of this fire hose needs to be further improved. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a fire hose made of pressure-resistant and hydrolysis-resistant TPU with good pressure resistance, hydrolysis resistance and long service life in view of the above-mentioned prior art status.

[0004] The technical solution adopted by the utility model to solve the above technical problem is as follows: The fire hose made of pressure-resistant and hydrolysis-resistant TPU includes an inner layer and an outer layer made of twill woven tube. It is characterized in that: the inner layer is a pressure-resistant hose made of TPU material, and a middle layer capable of improving the pressure resistance and hydrolysis resistance of the fire hose is further arranged between the outer layer and the inner layer. The outer wall of the middle layer is fixedly bonded to the outer layer, and the inner wall of the middle layer is fixedly bonded to the inner layer.

[0005] As an improvement, the middle layer preferably includes an outer middle layer, a middle middle layer and an inner middle layer, and the outer middle layer, the middle middle layer and the inner middle layer are bonded together in sequence.

[0006] Further improvement, the inner middle layer is preferably made of polyether type TPU material, the middle middle layer is made of mesh cloth, and the outer middle layer is made of polyester type TPU material.

[0007] Further improvement, a reinforcing layer is preferably arranged between the middle layer and the inner layer.

[0008] For further improvement, the reinforcing layer may preferably be a fiberglass layer, the outer wall of the reinforcing layer is adhesively bonded to the inner wall of the intermediate layer, and the inner wall of the reinforcing layer is adhesively bonded to the outer wall of the inner layer.

[0009] For further improvement, a second reinforcing layer may preferably be provided between the outer layer and the intermediate layer, and the second reinforcing layer is made of PVC material.

[0010] For further improvement, annular positioning protrusions may preferably be provided on the inner wall of the outer layer, and fitting grooves are respectively provided at corresponding positions of the second reinforcing layer.

[0011] As an improvement, shaping rings may preferably be distributed at intervals along the axial direction in the outer layer, and the shaping rings are fitted in the outer layer.

[0012] For further improvement, the shaping rings may preferably be made of nitinol alloy.

[0013] As an improvement, a wear-resistant protective coating may preferably be provided on the outer surface of the outer layer.

[0014] Compared with the prior art, the advantages of the present utility model are as follows: An intermediate layer is added. The intermediate layer is pressure-resistant and hydrolysis-resistant, thereby improving the pressure resistance and hydrolysis resistance of the fire hose and extending the service life of the fire hose; the inner layer is made of TPU material, and the TPU material has good pressure resistance and hydrolysis resistance, thereby further extending the service life of the fire hose; the intermediate layer has three layers, including an inner layer made of polyether-type TPU material, an intermediate layer made of mesh cloth, and an outer layer made of polyester-type TPU material. The inner layer made of ether-type TPU material has high strength, hydrolysis resistance, and high resilience, effectively improving the pressure resistance and hydrolysis resistance of the fire hose. The polyester-type TPU material has good tensile resistance, corrosion resistance, and wear resistance, improving the service life of the fire hose. The mesh cloth can fully contact the inner layer and the outer layer, making the two closely combined, improving the overall connection firmness of the intermediate layer, and further extending the service life of the fire hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of an embodiment of the present utility model;

[0016] Figure 2 is Figure 1 the front projection view of

[0017] Figure 3 is Figure 2 the sectional view along line A-A in

[0018] Figure 4 is Figure 3 the sectional view along line B-B in

[0019] Figure 5 is Figure 3Enlarged view of part I;

[0020] Figure 6 is Figure 4 Enlarged view of part II. Specific implementation manner

[0021] The following further describes the present utility model in detail in conjunction with the embodiments and the accompanying drawings.

[0022] As Figures 1 to 6 shown, the fire hose made of pressure-resistant and hydrolysis-resistant TPU in this embodiment includes an inner layer 1 and an outer layer 2 made of a twill woven tube. The end of the fire hose is sleeved on a joint 7. The inner layer 1 is a pressure-resistant hose made of TPU material. A middle layer capable of improving the pressure-resistant and hydrolysis-resistant performance of the fire hose is further provided between the outer layer 2 and the inner layer 1. The outer wall of the middle layer is fixedly bonded to the outer layer 2, and the inner wall of the middle layer is fixedly bonded to the inner layer 1.

[0023] The middle layer includes an outer middle layer 33, a middle middle layer 32, and an inner middle layer 31. The outer middle layer 33, the middle middle layer 32, and the inner middle layer 31 are adhesively bonded together in sequence. The inner middle layer 31 is made of polyether-type TPU material, the middle middle layer 32 is made of mesh cloth, and the outer middle layer 33 is made of polyester-type TPU material. A reinforcing layer 4 is provided between the middle layer and the inner layer 1. The reinforcing layer 4 is a fiberglass layer. The outer wall of the reinforcing layer 4 is adhesively bonded to the inner wall of the middle layer, and the inner wall of the reinforcing layer 4 is adhesively bonded to the outer wall of the inner layer 1. A second reinforcing layer 5 is provided between the outer layer 2 and the middle layer. The second reinforcing layer 5 is made of PVC material. An annular positioning protrusion 21 is provided on the inner wall of the outer layer 2. At corresponding positions of the second reinforcing layer 5, shaping rings 6 are respectively provided which are axially spaced apart and embedded in the outer layer 2. The shaping rings 6 are made of nitinol alloy. A wear-resistant protective coating 22 is provided on the outer surface of the outer layer 2. The wear-resistant protective coating 22 is a prior art. The materials mentioned in this embodiment are all prior art materials, which are applications of prior art materials rather than protecting the materials themselves.

Claims

1. A fire hose made of pressure-resistant and hydrolysis-resistant TPU, comprising an inner layer (1) and an outer layer (2) made of twill woven tubes, characterized in that: The inner layer (1) is a pressure-resistant hose made of TPU material. A middle layer that can improve the pressure resistance and hydrolysis resistance of the fire hose is also provided between the outer layer (2) and the inner layer (1). The outer wall of the middle layer is fixedly bonded to the outer layer (2), and the inner wall of the middle layer is fixedly bonded to the inner layer (1).

2. The fire hose according to claim 1, wherein: The middle layer includes an outer middle layer (33), a middle middle layer (32), and an inner middle layer (31). The outer middle layer (33), the middle middle layer (32), and the inner middle layer (31) are adhesively bonded together in sequence.

3. The fire hose according to claim 2, wherein: The inner middle layer (31) is a fire hose made of pressure-resistant and hydrolysis-resistant TPU, including an inner layer and an outer layer made of a twill braided tube. It is characterized in that: the inner layer is a pressure-resistant hose made of TPU material. A middle layer that can improve the pressure resistance and hydrolysis resistance of the fire hose is also provided between the outer layer and the inner layer. The outer wall of the middle layer is fixedly bonded to the outer layer, and the inner wall of the middle layer is fixedly bonded to the inner layer. The outer middle layer (33) is made of polyester-type TPU material.

4. The fire hose according to claim 3, wherein: A reinforcing layer (4) is provided between the middle layer and the inner layer (1).

5. The fire hose according to claim 4, wherein: The reinforcing layer (4) is a fiberglass layer. The outer wall of the reinforcing layer (4) is adhesively bonded to the inner wall of the middle layer, and the inner wall of the reinforcing layer (4) is adhesively bonded to the outer wall of the inner layer (1).

6. The fire hose according to claim 5, wherein: A second reinforcing layer (5) is provided between the outer layer (2) and the middle layer. The second reinforcing layer (5) is made of PVC material.

7. The fire hose according to claim 6, wherein: An annular positioning protrusion (21) is provided on the inner wall of the outer layer (2), and fitting grooves are respectively provided at corresponding positions of the second reinforcing layer (5).

8. The fire hose according to any one of claims 1 to 7, characterized in that: Shaping rings (6) are distributed at intervals along the axial direction in the outer layer (2). The shaping rings (6) are fitted in the outer layer (2).

9. The fire hose according to claim 8, characterized in that: The shaping rings (6) are made of nitinol alloy.

10. The fire hose according to any one of claims 1 to 7, characterized in that: A wear-resistant protective coating (22) is provided on the outer surface of the outer layer (2).

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