Tight-bonding structure

Abstract

A tight-bonding structure, comprising a tube (30), a thermal expansion tube sleeve (10), and a metal joint (20), wherein the thermal expansion tube sleeve (10) has two holes (11, 12) and is sleeved on one end of the tube (30); and an insertion core (22) of the metal joint (20) passes through the thermal expansion tube sleeve (10) and is inserted into the same end of the tube (30). The tube (30) and the metal joint (20) are tightly bonded together by means of the thermal expansion and contraction of the thermal expansion tube sleeve (10), such that high air tightness and resistance to separation are achieved, thereby effectively preventing gas or liquid leakage.

Description

Tight binding structure

[0001] This application claims priority to the Chinese patent application No. 202422317393.0, filed on September 23, 2024, and entitled "Tight binding structure", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to a tight binding structure, in particular a structure for binding a hose to a hard connector. BACKGROUND

[0003] A common method for assembling and binding a plastic hose to a metal connector is to use a metal clamp or sleeve to tightly bind the two, which is to first pass the plastic hose into the loose clamp or sleeve, and then to fasten it by hydraulic pressure, clamp or knob after the insert core of the metal connector is passed into the plastic hose and positioned. However, this method is prone to uneven force application, resulting in uneven fastening and single-point leakage. At the same time, since the sleeve and the insert core are both hard metals, destructive shear stress will be generated during assembly, which can easily damage the plastic hose in the middle, resulting in breakage or rupture. In addition, the assembly and binding method using the clamp or sleeve often requires additional equipment and tools to achieve, and the longer operation time and higher operation difficulty also affect the overall convenience. SUMMARY

[0004] Based on the above-mentioned defects, the present application provides a tight binding structure, comprising: a pipe body; a heat-expandable sleeve having two holes, the heat-expandable sleeve being sleeved on one end of the pipe body; and a metal connector having a body and an insert core, the insert core penetrating through the heat-expandable sleeve and being inserted into one end of the pipe body, characterized in that the heat-expandable sleeve fastens the pipe body and the insert core.

[0005] The two holes have different hole diameters.

[0006] The length of the heat-expandable sleeve is similar to the length of the insert core.

[0007] The heat-expandable sleeve is further provided with two abutting surfaces near the hole with a smaller hole diameter, and the upper surface of the pipe body and the lower surface of the body abut against the two abutting surfaces, respectively.

[0008] The heat-expandable sleeve is a polytetrafluoroethylene sleeve with plasticity. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a schematic exploded view of the tight binding structure according to the present application.

[0010] Fig. 2 is a schematic view of the tight binding structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0011] Referring to FIG. 1 and FIG. 2, a schematic diagram of the tight binding structure of the present application is shown. The tight binding structure comprises a heat expansion sleeve 10, a metal joint 20 and a pipe body 30. The heat expansion sleeve 10 is sleeved on one end of the pipe body 30, and the metal joint 20 penetrates the heat expansion sleeve 10 and is inserted into one end of the pipe body 30.

[0012] The heat expansion sleeve 10 has a first hole 11, a second hole 12 and two abutting surfaces 13. The inner diameter of the first hole 11 is larger than the inner diameter of the second hole 12, and the two abutting surfaces 13 are arranged adjacent to the second hole 12. The heat expansion sleeve 10 is sleeved on one end of the pipe body 30 through the first hole 11, and the upper surface of the pipe body 30 abuts against one of the abutting surfaces 13. The metal joint 20 has a body 21 and a plug 22, wherein the length of the heat expansion sleeve 10 is similar to the length of the plug 22, and the lower surface of the body 21 abuts against the other abutting surface 13, and the plug 22 penetrates the heat expansion sleeve 10 through the second hole 12 and is inserted into one end of the pipe body 30. In addition, the material of the heat expansion sleeve 10 is polytetrafluoroethylene with plasticity, which has the characteristics of thermal expansion and contraction, but the present application is not limited thereto, and other materials with this function can also be used according to needs.

[0013] Further, when the user assembles the tight binding structure, the heat expansion sleeve 10 is heated so that the inner diameter of the heat expansion sleeve 10 is larger than the outer diameter of the pipe body 30. Before the heat expansion sleeve 10 cools down, the heat expansion sleeve 10 is sleeved on the pipe body 30 and the plug 22 penetrates the heat expansion sleeve 10 and is inserted into the pipe body 30. When the heat expansion sleeve 10 cools down, it will shrink and the inner diameter will become smaller. The cooled heat expansion sleeve 10 will tighten the pipe body 30 and the plug 22, thereby enhancing the tight binding degree of the metal joint 20 and the pipe body 30.

[0014] Accordingly, the tight binding structure of the present application uses the heat expansion sleeve 10 to tightly bind the metal joint 20 and the pipe body 30. Due to the plasticity of the heat expansion sleeve 10, the assembly and binding can be completed only by using a heating tool, avoiding the use of other equipment and tools. Moreover, the heat expansion sleeve 10 will shrink and smoothly and snugly fit the outer surface of the pipe body 30 after cooling, thereby achieving the effects of high airtightness and tight binding. In addition, the length of the heat expansion sleeve 10 can completely tighten the pipe body 30 and the plug 22, preventing the pipe body 30 from being worn and leaking due to friction with the plug 22 in the case of long-term vibration or swinging.

[0015]

Reference numerals

Claims

1. A tight binding structure, comprising: a pipe body; a heat expandable sleeve having two holes, the heat expandable sleeve being sleeved on one end of the pipe body; and a metal joint having a body and a core, the core penetrating the heat expandable sleeve and being inserted into one end of the pipe body, characterized in that the heat expandable sleeve fastens the pipe body and the core. The two holes have different hole diameters.

2. The tight-binding junction structure of claim 1, wherein, The length of the heat expandable sleeve is similar to the length of the core.

3. The tight-binding junction structure of claim 1, wherein, The heat expandable sleeve is further provided with two abutting surfaces near the hole with a smaller hole diameter among the two holes, and the upper surface of the pipe body and the lower surface of the body abut against the abutting surfaces, respectively.

4. The tight-binding junction structure of claim 2, wherein, The heat expandable sleeve is a polytetrafluoroethylene sleeve with plasticity.

5. The tight-binding joint structure of claim 1, wherein, ​

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