Drill tail exhaust screw

Abstract

The invention relates to a drill tail exhaust screw, and belongs to the technical field of water circulation systems and equipment. The drill tail exhaust screw solves the technical problems that whenan exhaust unit is added to a pipe network in the later period, the technological process is complicated, workload is high, cost is high and water resource waste easily occurs. As one solution, the drill tail exhaust screw comprises a drill tail screw, a sealing gasket and a conical exhaust screw body. An annual sealing gasket groove is formed in the bottom face of the head portion of the drill tail screw in the circumferential direction of the top of a threaded rod. The sealing gasket is disposed in the annual sealing gasket groove. An exhaust passage is formed in the threaded rod of the drill tail screw in the direction of central axis. A threaded hole matched with the conical exhaust screw body is formed in the head portion of the drill tail screw body in the direction of central axis.A conical port is formed in the bottom of the threaded hole. The bottom of the threaded hole communicates with the top of the exhaust passage. The conical exhaust screw body is disposed in the threaded hole. The bottom of the conical exhaust screw body is matched with the conical port. The drill tail exhaust screw has the advantages of being reasonable in structural design, safe to use, easy andrapid to operate and the like.

Description

technical field [0001] The invention belongs to the technical field of water circulation system equipment, and in particular relates to a drill tail exhaust screw. Background technique [0002] Due to the construction process of the pipeline network in the plumbing heating system, water circulation air conditioning system and other water circulation systems, there will be fluctuations in the pipeline and the up and down bending of the pipeline. During the use of the undulating and upward arching part of the pipeline and the upward bending part of the pipeline, some air will remain. This part of the air cannot be completely removed in time and effectively, and local air resistance will occur. Therefore, it is necessary to install an exhaust device for exhaust during construction. gas. However, in actual construction, it is often the case that the exhaust device is not added or is forgotten to be installed. If the exhaust device is to be added later, all the water in the pipe...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a drill tail exhaust screw, which solves the technical process of adding exhaust devices in the later stage of the pipe network, such as complicated process, heavy workload, high cost, and easy waste of water resources. question

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