A pipe thread connection device

Abstract

The invention discloses a pipe threaded connecting device. The pipe threaded connecting device comprises a connecting body, a small inner tooth collar, a large inner tooth collar, a sealing ring, a spring washer and a screw cap, wherein a cavity which is used for communicating with a sleeving pipe is formed in one side of the connecting body in the axial direction; a nut joint which communicates with the cavity is arranged on the other side of the connecting body; a projection part which is used for positioning an orifice of a stopping pipe is arranged on a wall of the cavity; the wall of the cavity is successively provided with a first female end, a second female end and inner threads from the projection part to the outer side; an inner chamber for accumulating the sealing ring is formed between the first female end and the second female end; a ring slot which is connected with the spring washer in an inlaid manner is formed in an end surface of the inner side of the sealing ring; a through hole which is in clearance fit with the pipe is formed in the screw cap in the axial direction; and a set screw which is used for fastening the pipe is arranged on the screw cap in the radial direction. The pipe threaded connecting device is suitable for connection of pipelines in a refrigerating system of an air conditioner, various components are assembled in a modular manner to form a cold connecting device for pipes, a mounting process is simple and efficient, connecting quality is safe and reliable, and sealing effect is good.

Description

technical field [0001] The invention relates to the technical field of pipeline connection, in particular to a pipeline threaded connection device. Background technique [0002] With the development and progress of science and technology, HVAC fields such as household and commercial central air conditioners, cold storage, car air conditioners, water coolers and air source heat pumps have also developed vigorously. For example, in recent years, central air conditioners have spread to thousands of homes at an unprecedented rate. Ten thousand households. The installation of central air-conditioning is a complex system engineering. At present, there is no complete set of standard installation specifications for central air-conditioning in the market. The pipeline connection process of the central air conditioner needs to follow certain installation standards in order to truly exert the energy efficiency of the central air conditioner and reduce maintenance troubles in the later...

AI Technical Summary

Problems solved by technology

The air-conditioning pipeline connection process in the prior art usually adopts brazing technology. Although this process method is widely used, it has many disadvantages. The on-site construction equipment is complicated, the welding process is difficult, and the technical level of the construction personnel is high. Open flames, high-temperature toxic gases are produced in the flame welding process, the working environment is harsh, and there are fire hazards. Special safety measures need to be taken at the construction site

[0003] A Chinese patent document with an application date of September 18, 2014 and an announcement date of December 31, 2014 discloses a cold connection device for pipelines, which replaces the traditional brazing process with compression-type cold connection technology to form a modular Installation standard, the use of cold connection eliminates the trouble and danger caused by open flames, and reduces the technical level of operators. The sealing effect is achieved by the installation, and then the press-fitting process is carried out. Under the action of pressure, the raised ring, the pipe and the inner bushing all bend downward to play the role of mechanical connection. This mechanical connection structure is firm and reliable, and it is not easy to appear during use. Pull off, but the way of applying the sealing liquid is susceptible to cracking under the influence of high temperature environment and external impact force, resulting in the failure of the sealing effect and the problem of short service life

A Chinese patent document with an application date of December 30, 2014 and an announcement date of July 15, 2015 discloses a pipe connection device, the main function of which is to compress the pressure ring towards the main body of the pipe. , can compress the outer liner and the pressure ring, so as to realize the compact connection, the deformation of the inner liner and the outer liner is similar to that of the bellows, and the sealing and connection are realized. Under the influence of force, it is prone to the problem of insufficient sealing effect

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