Double-layer hose

Abstract

The utility model discloses a double-layer hose which is characterized in that the double-layer hose comprises an inner pipe, an outer pipe, an outer pipe and an inner pipe, and the outer pipe covers the outer side of the inner pipe, and the outer pipe can be elastically shrunk so as to drive the inner pipe to be shrunk. Compared with the prior art, the telescopic hose has the advantages that the telescopic outer pipe is arranged, so that the hose can be shrunk into a shorter state in a natural state, the hose is convenient to store, and the outer pipe can play a role in protecting the inner pipe and preventing the inner pipe from being damaged; by arranging the inner pipe which cannot stretch out and draw back, the diameter of the inner pipe can be kept unchanged when the hose stretches out and draws back, and therefore the water flow can be easily controlled.

Description

Technical Field

[0001] The utility model relates to the field of hoses, in particular to a double-layer hose. Background Art

[0002] In scenes such as watering flowers and washing cars, telescopic hoses are often used. Telescopic hoses have the advantage of being easy to store. However, the diameter of the elastic hose often becomes smaller after being stretched, which affects the cross-sectional size and makes it impossible to achieve the required water flow. Utility Model Content

[0003] In order to solve the defects of the prior art mentioned above, the utility model proposes a double-layer hose.

[0004] The technical solution of the utility model is implemented as follows: a double-layer hose comprises: an inner tube which cannot be extended or retracted; an outer tube which is coated on the outer side of the inner tube and can be elastically contracted, thereby driving the inner tube to shrink.

[0005] In one of the embodiments, a first female connecting sleeve and a second female connecting sleeve are respectively provided at both ends of the double-layer hose. The first female connecting sleeve and the second female connecting sleeve clamp the inner tube and the outer tube at the same time and can be connected to a male connector.

[0006] In one of the embodiments, the inner tube is made of PE, PU or PVC.

[0007] In one embodiment, the outer tube includes a first side surface and a second side surface, the two sides of the first side surface and the two sides of the second side surface are sewn together, and an elastic rope is provided at the sewing position, so that the outer tube can be elastically contracted.

[0008] In one embodiment, the two sides of the first side and the second side are made of woven cloth.

[0009] In one embodiment, the inner tube is a circular tube with a diameter of d mm, and the outer tube has a width of s mm in a contracted state, wherein s = (πd / 2 + a) mm, and 1 mm ≤ a ≤ 3 mm.

[0010] In one embodiment, d=10 mm, s=16 mm.

[0011] In one embodiment, the length of the inner tube is h mm, the length of the outer tube in the extended state is H mm, and H=2h.

[0012] In one embodiment, the wall thickness of the inner tube is 1 mm to 3 mm.

[0013] In one embodiment, the wall thickness of the inner tube is 2 mm.

[0014] The advantages of the utility model are:

[0015] (1) By providing a retractable outer tube, the hose can be retracted to a shorter state in a natural state, making the hose easy to store, and the outer tube can protect the inner tube and prevent the inner tube from being damaged;

[0016] (2) By providing a non-retractable inner tube, the diameter of the inner tube can remain unchanged when the hose is extended or retracted, thereby making it easier to control the water flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a double-layer hose provided by the utility model;

[0018] Figure 2 This is a cross-sectional view of the outer tube provided by the utility model.

[0019] In the figure, there is an inner tube 1, an outer tube 2, a first side surface 21, a second side surface 22, an elastic rope 23, a first female connecting sleeve 31, and a second female connecting sleeve 32. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1 to Figure 2 As shown, the utility model discloses a double-layer hose, which comprises: an inner tube 1 which cannot be extended or retracted; an outer tube 2 which is coated on the outer side of the inner tube 1 and can be elastically contracted, thereby driving the inner tube 1 to shrink.

[0022] It can be understood that the outer tube 2 is elastic and can shrink, while the inner tube 1 is inelastic. The outer tube 2 is wrapped around the inner tube 1. When the outer tube 2 shrinks, it can drive the inner tube 1 to shrink, thereby shortening the length of the hose for easy storage.

[0023] Preferably, a first female connecting sleeve 31 and a second female connecting sleeve 32 are respectively provided at both ends of the double-layer hose. The first female connecting sleeve 31 and the second female connecting sleeve 32 clamp the inner tube 1 and the outer tube 2 at the same time and can be connected to a male connector.

[0024] It should be noted that the first female connection sleeve 31, the second female connection sleeve 32 and the male connector are quick connectors, and by providing the quick connectors, the pipes can be conveniently connected. It is worth mentioning that the pipe quick connector is a prior art and will not be described in detail here.

[0025] Preferably, the inner tube 1 is made of PE, PU or PVC.

[0026] It is understandable that the inner tube 1 may also be made of other materials that are not elastic or have poor elasticity.

[0027] Preferably, the outer tube 2 includes a first side surface 21 and a second side surface 22 , both sides of the first side surface 21 and both sides of the second side surface 22 are sewn together, and an elastic rope 23 is provided at the sewing position, so that the outer tube 2 can be elastically contracted.

[0028] Preferably, both sides of the first side surface 21 and the second side surface 22 are made of woven cloth.

[0029] Preferably, the inner tube 1 is a round tube with a diameter of d mm, and the outer tube 2 has a width of s mm in a contracted state, wherein s=(πd / 2+a) mm, and 1 mm≤a≤3 mm.

[0030] Preferably, d=10 mm, s=16 mm.

[0031] It is worth mentioning that the outer tube 2 is wrapped around the outside of the inner tube 1, and there is a certain gap between the outer tube 2 and the inner tube 1. However, since the outer tube 2 is a flat structure, the side of the outer tube 2 can fit with the inner tube 1, so that the outer tube 2 can drive the inner tube 1 to shrink when the elasticity is shortened.

[0032] Preferably, the length of the inner tube 1 is h mm, the length of the outer tube 2 in the extended state is H mm, and H=2h.

[0033] Preferably, the wall thickness of the inner tube 1 is 1 mm to 3 mm.

[0034] Preferably, the wall thickness of the inner tube 1 is 2 mm.

[0035] It should be noted that by controlling the wall thickness of the inner tube 1 , while ensuring that the inner tube 1 has sufficient strength, a better shrinkage effect is achieved, so that the outer tube 2 can drive the inner tube 1 to shrink as a whole.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer hose, characterized in that: The double-layer hose comprises: The inner tube cannot be extended or retracted; The outer tube is wrapped around the outer side of the inner tube and can be elastically contracted, thereby driving the inner tube to shrink. The two ends of the double-layer hose are respectively provided with a first female connecting sleeve and a second female connecting sleeve, the first female connecting sleeve and the second female connecting sleeve clamp the inner tube and the outer tube at the same time, and can be connected to a male connector.

2. A double-layer hose according to claim 1, characterized in that: The inner tube is made of PE, PU or PVC.

3. A double-layer hose according to claim 1, characterized in that: The outer tube comprises a first side surface and a second side surface, the two sides of the first side surface and the two sides of the second side surface are sewn together, and an elastic rope is arranged at the sewing position, so that the outer tube can be elastically contracted.

4. A double-layer hose according to claim 3, characterized in that: The two sides of the first side surface and the second side surface are made of woven cloth.

5. A double-layer hose according to claim 1, characterized in that: The inner tube is a round tube with a diameter of d mm, and the outer tube has a width of s mm in a contracted state, wherein s=(πd / 2+a) mm, and 1 mm≤a≤3 mm.

6. A double-layer hose according to claim 5, characterized in that: d=10 mm, s=16 mm.

7. A double-layer hose according to claim 6, characterized in that: The length of the inner tube is h mm, the length of the outer tube in the extended state is H mm, and H=2h.

8. A double-layer hose according to claim 1, characterized in that: The wall thickness of the inner tube is 1 mm to 3 mm.

9. A double-layer hose according to claim 1, characterized in that: The wall thickness of the inner tube is 2 mm.

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