CN2103077U

CN2103077U - Expansible move joint

Info

Publication number: CN2103077U
Application number: CN 91225715
Authority: CN
Inventors: 周润宗
Original assignee: JIAXING CITY HARDWARE WATER HEATING EQUIPMENT FACTORY
Current assignee: JIAXING CITY HARDWARE WATER HEATING EQUIPMENT FACTORY
Priority date: 1991-09-24
Filing date: 1991-09-24
Publication date: 1992-04-29

Abstract

The utility model relates to a telescopic movable joint used for connecting pipe fittings, which comprises an inner connecting cap, an outer connecting cap, a sealing sleeve and a sealing ring. When the utility model is used, only a pipe at one end is hinged with threads, the inner connecting cap is screwed on the threads, a pipe at the other end is orderly sheathed with the outer connecting cap, the sealing ring and the sealing sleeve, and then, the outer connecting cap is screwed on the inner connecting cap and is screwed tightly, and the installation of the movable joint is finished. The utility model has the advantages of convenient operation, raw material saving, etc. The requirement of the cut length of the pipe is not strict.

Description

Expansible move joint

The utility model relates to the union that a kind of pipeline connects usefulness.

Union commonly used is made up of two connection pipe fittings and an attachment cap, each personal screw thread of two connection pipe fittings links to each other with two pipes, tighten together with attachment cap again, the pad upper gasket is with sealing between two connection pipe fittings, because the length of union is unadjustable, the size of pipe must be cut very accurately, and two tube ends must all cut with scissors screw thread.

The purpose of this utility model is to propose a kind of cut lengths to pipe to require not tight pipe union.

This scalable union comprises interior attachment cap, outer attachment cap, stuffing box gland and an above seal ring, the screw thread that matches with pipe is arranged on the inwall of interior attachment cap, the outer wall of interior attachment cap matches with the inwall of screw thread with the big end of outer attachment cap, stuffing box gland and seal ring are in the outer attachment cap, their internal diameter is identical with the external diameter of pipe, the front end of stuffing box gland has a flange, be clipped between the sealing surface of outer attachment cap and interior attachment cap, outer attachment cap small end has an inside flange, pushes down seal ring and stuffing box gland successively.

When this scalable union is used, only need to cut with scissors screw thread on the pipe at one end, above interior attachment cap is screwed in, attachment cap, seal ring and stuffing box gland outside on the other end pipe, putting successively, on the attachment cap, screw in then outer attachment cap being screwed to, union is promptly installed and is finished.The sealing of this union is to rely on tight between the flange of stuffing box gland and the interior attachment cap sealing surface to contact and stuffing box gland, seal ring are realized with tight contact the between the pipe.Use this union, therefore not tight during installation to the Cutting Length requirement of pipe because can relatively move within the specific limits between stuffing box gland and the pipe, adjust, and only need at one end cut with scissors screw thread on the pipe, operation is also just convenient.The metalwork of whole union has only two, and length is also shorter, and raw material also can be saved.

Accompanying drawing is the structural drawing of this scalable union.

(3) are interior attachment cap as shown in the figure, rely on the screw thread (2) on the inwall to be connected with pipe (1), the outer wall of interior attachment cap is matched with the big end inwall of outer attachment cap (5) by screw thread (4), stuffing box gland (7) is in the outer attachment cap (5), be enclosed within on the pipe (10), (6) be the flange of stuffing box gland, be clipped between the sealing surface of interior attachment cap and outer attachment cap, there are two among seal ring (8) figure, are pressed on stuffing box gland (7) and the pipe (10) by the flange (9) of outer attachment cap small end.

The interior attachment cap of this scalable union and outer attachment cap can be cast with malleable cast iron.Screw thread in the reprocessing, stuffing box gland can adopt teflon to make raw material, and seal ring is then made of rubber.This scalable union can be born 16kg/cm ²Working pressure, the latitude of joint is 0.5-2cm, compares cost-saved 10-20% with original union.

Claims

A kind of pipe fitting connects the scalable union of usefulness, comprise interior attachment cap (3), outer attachment cap (5), the screw thread (1) that matches with pipe is arranged on the inwall of interior attachment cap, the outer wall of interior attachment cap matches with the big end inwall of outer attachment cap with screw thread (4), it is characterized in that it also comprises a stuffing box gland (7) and more than one seal ring (8), stuffing box gland and seal ring are in the outer attachment cap, their internal diameter is identical with the external diameter of pipe, the front end of stuffing box gland has a flange (6), be clipped between the sealing surface of outer attachment cap and interior attachment cap, outer attachment cap small end has an inside flange (9), pushes down seal ring (8) and stuffing box gland (7) successively.