Tightening combination structure

Abstract

A binding combination structure comprises a pipe body, a thermal expansion pipe sleeve and a metal connector, the thermal expansion pipe sleeve is provided with two holes and is arranged at one end of the pipe body in a sleeved mode, an insertion core of the metal connector penetrates through the thermal expansion pipe sleeve and is arranged at one end of the pipe body in an inserted mode, and the pipe body and the metal connector are tightly combined through thermal expansion and cold contraction of the thermal expansion pipe sleeve. The gas tightness is high, separation is not prone to occurring, and gas or liquid leakage is effectively prevented.

Description

Technical Field

[0001] The utility model relates to a tight binding structure, in particular to a structure for combining a hose with a rigid joint. Background Art

[0002] The commonly used method for assembling and joining a plastic hose and a metal joint is to use a metal clamp or sleeve to fasten and combine the two. The method is to first insert the plastic hose into the loose clamp or sleeve. After the core of the metal joint penetrates the plastic hose and is positioned, it is tightened by hydraulic pressure, a fixture or a knob. However, this method is prone to uneven force application, resulting in uneven tightening and causing single-point leakage problems. At the same time, since both the sleeve and the core are hard metals, destructive shear stress will be generated during assembly, easily damaging the intermediate plastic hose, resulting in breakage or fracture. In addition, the assembly and joining method using a clamp or sleeve often requires additional equipment and tools to achieve. The long operation time and high operation difficulty also affect the overall convenience. Summary of the Utility Model

[0003] Based on the above defects, the utility model provides a tight binding structure, including: a tube body; a thermal expansion sleeve having two holes, the thermal expansion sleeve is sleeved on one end of the tube body; and a metal joint having a body and a core, the core penetrates the thermal expansion sleeve and is inserted into one end of the tube body, characterized in that the thermal expansion sleeve fastens the tube body and the core.

[0004] Wherein, the aperture sizes of the two holes are different.

[0005] Wherein, the length of the thermal expansion sleeve is similar to the length of the core.

[0006] Wherein, the thermal expansion sleeve is also provided with two abutting surfaces near the hole with a smaller aperture, and the upper surface of the tube body and the lower surface of the body respectively abut against the two abutting surfaces.

[0007] Wherein, the thermal expansion sleeve is a plastic polytetrafluoroethylene sleeve. Description of the Drawings

[0008] Figure 1 is a schematic exploded view of the tight binding structure according to the utility model.

[0009] Figure 2 is a schematic view of the tight binding structure according to the embodiment of the utility model. Detailed Embodiment

[0010] Refer to Figure 1 And Figure 2, showing a schematic diagram of the tight binding structure of the present utility model. The tight binding structure includes a thermal expansion tube sleeve 10, a metal joint 20, and a tube body 30. The thermal expansion tube sleeve 10 is sleeved on one end of the tube body 30, and the metal joint 20 penetrates through the thermal expansion tube sleeve 10 and is inserted into one end of the tube body 30.

[0011] The thermal expansion tube 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 thermal expansion tube sleeve 10 is sleeved on one end of the tube body 30 through the first hole 11, and the upper surface of the tube body 30 abuts against one of the abutting surfaces 13. The metal joint 20 has a body 21 and an insert core 22. Among them, the length of the thermal expansion tube sleeve 10 is similar to the length of the insert core 22, and the lower surface of the body 21 abuts against the other abutting surface 13. The insert core 22 penetrates through the thermal expansion tube sleeve 10 through the second hole 12 and is inserted into one end of the tube body 30. In addition, the material of the thermal expansion tube sleeve 10 is polytetrafluoroethylene with plasticity, which has the characteristics of thermal expansion and contraction. However, the present utility model is not limited thereto, and other materials with this function can also be used according to requirements.

[0012] Further, when the user assembles the tight binding structure, the thermal expansion tube sleeve 10 is heated so that the inner diameter of the thermal expansion tube sleeve 10 is larger than the outer diameter of the tube body 30. Before the thermal expansion tube sleeve 10 cools down, the thermal expansion tube sleeve 10 is sleeved on the tube body 30 and the insert core 22 penetrates through the thermal expansion tube sleeve 10 and is inserted into the tube body 30. When the thermal expansion tube sleeve 10 cools down, it will shrink and the inner diameter will become smaller. The cooled thermal expansion tube sleeve 10 will fasten the tube body 30 and the insert core 22, thereby enhancing the fastening and binding degree between the metal joint 20 and the tube body 30.

[0013] Accordingly, the tight binding structure of the present utility model uses the thermal expansion tube sleeve 10 to fasten and join the metal joint 20 and the tube body 30. Due to the plasticity of the thermal expansion tube sleeve 10, the assembly and joining can be completed only by using a heating tool, avoiding the use of other equipment and tools. And the thermal expansion tube sleeve 10 will contract and fit smoothly and closely to the outer surface of the tube body 30 after cooling, thereby achieving the effects of high airtightness and tight binding. In addition, the length of the thermal expansion tube sleeve 10 can completely fasten the tube body 30 and the insert core 22, preventing the tube body 30 from being worn and leaking due to friction with the insert core 22 under long-term vibration or swinging.

[0014]

Reference Signs

[0015] 10: Thermal expansion tube sleeve

[0016] 11: First hole

[0017] 12: Second hole

[0018] 13: Contact surface

[0019] 20: Metal joint

[0020] 21: Body

[0021] 22: Insert core

[0022] 30: Pipe body

Claims

1. A tight-binding structure, comprising: A tube body; A thermal expansion tube sleeve, which has two holes, and the thermal expansion tube sleeve is sleeved on one end of the tube body; And A metal joint, which has a body and a ferrule, the ferrule penetrates through the thermal expansion tube sleeve and is inserted into one end of the tube body, and is characterized in that the thermal expansion tube sleeve fastens the tube body and the ferrule.

2. The tight binding structure according to claim 1, wherein, The aperture sizes of the two holes are different.

3. The tight-binding structure according to claim 1, wherein, The length of the thermal expansion tube sleeve is similar to the length of the ferrule.

4. The tight-binding structure according to claim 2, wherein, The thermal expansion tube sleeve is also provided with two abutting surfaces near the hole with a smaller aperture among the two holes, and the upper surface of the tube body and the lower surface of the body respectively abut against the abutting surfaces.

5. The tight-binding structure according to claim 1, wherein, The thermal expansion tube sleeve is a polytetrafluoroethylene tube sleeve with plasticity.

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