CN2459513Y

CN2459513Y - Pipe joint fitting

Info

Publication number: CN2459513Y
Application number: CN 00242563
Authority: CN
Inventors: 陈永坚
Original assignee: Hong Kong and China Gas Co Ltd
Current assignee: Hong Kong and China Gas Co Ltd
Priority date: 2000-06-20
Filing date: 2000-08-14
Publication date: 2001-11-14
Anticipated expiration: 2010-08-14
Also published as: HK1031171A2; JP3082693U

Abstract

A pipe fitting 10 comprises a hollow body 11, and at least one open end 12 for connection with another pipe fitting 100, said open end 12 being preformed with an internal thread 13 for connection, wherein the open end 12 comprises an integrally formed extending flange 14 having an internal diameter greater than the internal diameter of the internal thread 13 for surrounding the unengaged trailing thread 120A of another pipe fitting 100 and forming an annular gap 15 therebetween for retaining a sealing material X.

Description

Pipe joint

The utility model relates to a kind of Pipe joint that is used to assemble delivery line, especially but do not limit the use of in the culinary art and the heating gas.

The Pipe joint major part is used to assemble pipeline; with this liquid is transported to the other end from an end of pipeline; the form utilization that these Pipe joints can be engaged with a lot of various pipes is in different designs; adopt iron as a kind of lower cost materials of producing the allusion quotation shape of Pipe joint and pipe; and; its end product plates the material of the similar zinc of one deck usually, with the protection body material, prevents that it from getting rusty.

Pipe fitting is cut pin screw thread, for the usefulness that is screwed together, outside the body material that screws togather the position can be exposed to.After connection, can expose near the body material that screws togather the position, this expose portion needs protection, and at present, reaches the protection purpose to adopt to apply usually, but is not very reliable.

The purpose of this utility model is to provide a kind of improved Pipe joint, to alleviate or to alleviate at least the problems referred to above.

According to the utility model, a kind of Pipe joint is provided, and it comprises a hollow body, and at least one opening end of being connected with a pipe of being used for, described opening end pre-shaping is useful on the internal thread of connection, wherein, this opening end comprises the stretch flange formability of an one, and it has an internal diameter, internal diameter than this internal thread is big, in order to the tail end screw thread that does not mesh around this pipe, and form an annular space betwixt, so that maintain joint filling material.

Preferably, this flange has certain thickness wall, and is suitable with the wall thickness of the opening end of its back.

Preferably, the external diameter of this flange is bigger relatively than the external diameter of flange rear opening end.

In a preferred embodiment, this screw thread outwards has a small tapering with respect to this opening end axis with a small angle.

Preferably, Pipe joint is made by the galvanized iron material.

This Pipe joint can be elected elbow, T shape connected member, straight connector and end cap as.

The advantage of the utility model device is, it can avoid screwing togather outside near the position body material is exposed to, and gets rusty to prevent it, makes that its surface is clean and tidy.

Below in conjunction with accompanying drawing, in the mode of example the utility model is described, wherein:

Fig. 1 is first embodiment's of the utility model Pipe joint a cut-away section side view, and it shows and a pipe coupled condition;

Fig. 2 is second embodiment's of the utility model Pipe joint a cut-away section side view;

Fig. 3 is the 3rd embodiment's of the utility model Pipe joint a cut-away section side view;

Fig. 4 is the 4th embodiment's of the utility model Pipe joint a cut-away section side view;

At first with reference to figure 1, show the utility model Pipe joint first embodiment, it illustrates the form that one 90 ° of elbows 10 are connected with straight tube 100, and an end 110 of straight tube 100 has the outside thread 120 that connects usefulness.

This elbow 10 has an arc hollow body 11 and two cylinder type opening ends 12, each opening end 12 pre-shaping has internal thread 13, and comprise an one-body molded flange 14, its internal diameter is relatively big than internal thread 13 internal diameters, compare with the thickness of the opening end 12 of its back, the wall thickness of flange 14 is basic identical or suitable, to guarantee its intensity.It is big that the external diameter of external diameter ratio open end 12 bodies of flange 14 is wanted relatively.

Elbow 10 and straight tube 100 link together by screwing togather mutually between its

screw thread

13 and 120, connect in order to reach as far as possible tightly,

screw thread

13 and 120 is with the small angle with respect to about 1 degree of the central shaft of opening end 12 and straight tube end 110～5 degree, a small angle outwards and is inwardly arranged respectively, can be combined closely by wedge action and opening end 12 in straight tube end 110, therefore, in fact be not with screw thread 120 and screw thread 13 whole screwing togather, but leave a circle or two circles, 120A does not screw togather as tailing screw flight, and then it exposes.When machining screw 120 at the scene, especially like this, tend to or practically screw thread 120 be processed into longer a little than screw thread 13, a for example long circle or two encloses.

Flange 14 is made long enough, with this by around the straight tube 100 tailing screw flight 120A that cover other exposure, form an annular space 15 between flange 14 internal surfaces and straight tube end 110 outer surfaces, it comprises the tailing screw flight 120A that does not screw togather, and has been full of sealed mixture X fully in this gap 15.

Sealed mixture X can easily be applied on the flange 14; 15 flange 14 are being fixed with being stabilized in the annular space; except sealing engagement; mixture X also can be protected the straight tube that does not screw togather screw thread 120A 100 body materials (iron) of exposure; get rusty preventing; screw thread 120A is unhidden in flange 14 time when screwing togather, and this joint makes appearance neat.

Fig. 2 shows second embodiment of pipe part of the present invention, it forms a kind of T shape connected member 20, this connected member 20 has had the opening end 22 of body 21 with three different-diameters that are used for being connected with pipe, each opening end 22 all has preformed internal thread 23, and comprise integrally formed flange 24, this flange 24 is with above-mentioned flange 14 structural similarities and have aforesaid identical function.

Fig. 3 shows the 3rd embodiment of Pipe joint of the present invention, it forms a kind of straight connected member 30, this connected member 30 has had body 31, it comprises the opposing open end 32 and 32 ' that is used to connect, first opening end 32 is formed with internal thread 33 and includes the similar flange 34 of integrally formed and above-mentioned flange 14, and another port 32 ' is formed with outside thread 33 ' (inwardly little by little attenuating slightly), is used for outside thread and connects, the profile of body 31 is a hexagon, so that rotate with spanner easily.

Fig. 4 shows the 4th embodiment of Pipe joint of the present invention, it forms an end cap 40, it has (sky) body 41 and single opening end 42, an end that is used for blanked-off pipe, this opening end 42 is formed with internal thread 43 and comprises integrally formed flange 44, be used to finish the identical function of flange 44 as mentioned above, this body 41 has external fin, so that rotation.

Embodiment of the present utility model only is exemplary, but not determinate, and those skilled in the art can make various modification in the scope of appending claims, all belong to scope of the present utility model.

Claims

1. Pipe joint, it comprises a hollow body, and at least one being used for and the opening end that is connected of pipe, described opening end pre-shaping is useful on the internal thread of connection, and comprises an one-body molded stretch flange formability, and it has an internal diameter, internal diameter than this internal thread is big, in order to the tail end screw thread that does not mesh around described pipe, and form an annular space betwixt, so that maintain sealing material; It is characterized in that the thickness of the thickness of the wall of described flange and the described opening end of its back is suitable; The external diameter of institute's flange is bigger than the external diameter that is connected on flange rear opening end.

2. Pipe joint as claimed in claim 1 is characterized in that, described screw thread outwards has a small tapering with respect to described opening end axis with a small angle.

3. Pipe joint as claimed in claim 1 or 2 is characterized in that described Pipe joint is made by the galvanized iron material.

4. Pipe joint as claimed in claim 1 or 2 is characterized in that, described Pipe joint is following several: elbow, T shape connected member, straight connector and end cap.