Rotary locking quick joint

Abstract

The invention discloses a rotary locking quick joint. The rotary locking quick joint comprises a joint body; a connecting cavity matched with a pipe is arranged in the joint body; a sealing ring accommodating cavity is formed above the connecting cavity; a rubber sealing ring is arranged in the sealing ring accommodating cavity, and sleeves the pipe; the inner wall of the rubber sealing ring formssealing with the outer wall of the pipe, and the outer wall forms sealing with the inner wall of the sealing ring accommodating cavity; an external thread is arranged on the outer wall of the end part of the joint body, and is screwed with a locking hand wheel; a clamping piece is assembled on the locking hand wheel; clamping elastic pieces are peripherally distributed at the lower part of the clamping piece; convex heads are arranged at the lower ends of the clamping elastic pieces; and the convex heads are matched with step surfaces in the locking hand wheel. The rotary locking quick jointhas the following advantages: the structure is simple; during connecting, the locking hand wheel is tightly screwed, so that the rubber sealing ring is pressed by the clamping pieces to guarantee thesealing reliability; and during assembling, the locking hand wheel is loosened, and the sealing of the rubber sealing ring is damaged by the clamping pieces, so that the pipe can be easily pulled out,and connection and disassembly are both convenient.

Description

technical field [0001] The invention relates to the technical field of quick joints, in particular to a rotary locking quick joint. Background technique [0002] At present, most of the sealing connection structures of pipe joints are externally threaded pipe joints threaded with internally threaded pipes or externally threaded pipes and internally threaded pipe joints. The paint cures and develops to the current polyethylene tape wrapping. Since the amount of winding cannot be accurately controlled when the sealing material is used, the tightness of the joint cannot be guaranteed if the winding is small, and the screwing in of the thread will be affected if the winding is too large. Moreover, this sealing method cannot be guaranteed to be effective for a long time, and leakage will occur after a period of use; Replacing the pipeline or cutting off the damaged section of the pipeline and re-tapping the thread will bring great inconvenience to maintenance. [0003] Since t...

AI Technical Summary

Problems solved by technology

When using sealing materials, the amount of winding cannot be accurately controlled. If there is less winding, the tightness of the joint cannot be guaranteed. If there is too much winding, it will affect the screwing of the thread.

Moreover, this sealing method cannot be guaranteed to be effective for a long time, and leakage will occur after a period of use; Replacing the pipe or cutting off the damaged section of the pipe and re-tapping the thread will bring great inconvenience to maintenance

[0003] Since the pipeline quick connectors produced and sold on the market now have certain design defects, which may cause pipeline leakage or accidents, the main reasons are as follows: 1. Structural design defects, the express connectors used now Most of them are ultrasonic welding and mechanical pressure caps. In the actual production process, virtual welding and material rupture cannot be completely avoided.

2. The sealing method is unreasonable. The pipe is inserted into the quick connector. After the connection, the sealing ring is in a suspended state. When the pipe bends to a certain extent and the fluid pulses, it is prone to leakage

3. The locking method is unreasonable or cannot be locked. It is necessary to use the locking piece to complete the locking of the tube. The use process is complicated, and it takes many steps to complete the complete connection. It is difficult for non-professionals to judge whether the pipeline and the joint have been locked.

However, in the actual production and use process, it is found that the above-mentioned quick connector is inconvenient to disassemble, and the disassembly process may cause damage to the parts; Axial displacement will occur outside the pipe, and 100% sealing cannot be guaranteed, so its structure needs further improvement

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