CN2245153Y - Single and double external screw-thread movable joint - Google Patents

Abstract

The utility model relates to a single and double external screw-thread movable joint which comprises an octagon-shaped caliber and a connecting nut. One end or both ends of the octagon-shaped caliber are provided with an extension caliber with external screw threads, and therefore, use functions are added. When used for connecting pipes, the single and double external screw-thread movable joint can directly connect valves, etc. without using any external screw-thread free flow joint as auxiliary connection. Therefore, connection points are reduced, leakage points are reduced accordingly, the cost is lowered and the work efficiency is improved. The utility model has the advantages of simple structure and easy fabrication and installation and is suitable for connecting and installing heat supplying pipes, water supplying pipes and gas supplying pipes.

Description

Single, double outside thread union

The utility model relates to a kind of pipe joint, particularly a kind of single, double outside thread union that is used to connect the identical inside nominal diameter pipeline of frequent dismounting.

In the pipeline of heating, air feed connects, when being used for the tube and tube connection of identical inside nominal diameter, usually adopt female union to connect, and when pipe is connected with other pipe fittings such as three-way pipe, valves, one or both ends often need use the outside thread free flow coupling to do to be connected with part pipe fittings such as three-way pipe, valves after auxiliary the connection again, like this, bring much loaded down with trivial details to fitting operation, waste of manpower, material resources, financial resources influence two and make efficient; Because the pipe fitting that uses is many, tie point is many, causes that breakthrough is also corresponding to be increased, and influences using effect; Because the Connecting format unification of internal thread union in pipeline, application area is restricted.

The purpose of this utility model is to provide a kind of simple in structure, simple installation, in the pipeline connection procedure, does not need to use the outside thread free flow coupling to do the auxiliary single, double outside thread union that connects.

The purpose of this utility model is achieved in that a kind of single, double outside thread union, comprise anistree caliber, attaching nut, wherein, the one or both ends of anistree caliber are provided with is with externally threaded lengthening caliber, is connected as a single entity by inclined-plane and anistree caliber transitional face.The utility model compared with prior art, owing to adopt the one or both ends lengthening caliber of union and be provided with outside thread, increased function of use, make union when being connected, not need to use the outside thread free flow coupling to do auxiliary the connection with the part pipe fitting, tie point, breakthrough have been reduced, the cost that fallen paper has improved working efficiency.Have simple in structure being easy to and make, simple installation, saving of work and time, characteristics such as with low cost are suitable for pipelines such as heat supply, water supply, air feed and are extensive use of in connecting.

Description of drawings is as follows:

Fig. 1 is the utility model embodiment 1 structure half section schematic representation;

Fig. 2 is the utility model embodiment 2 structure half section schematic representation;

Fig. 3 is the utility model scheme of installation;

Below in conjunction with drawings and Examples the utility model is described in further detail:

Embodiment 1

Consult shown in Figure 1, on existing internal thread union basis, the needs different according to inside nominal diameter Dgmm remove original internal thread with an end of anistree caliber (3), and the 14～38mm that extends, the part of lengthening is added together with original length, inwards to 16～47mm, be set to outside thread from end face, and be connected as a single entity by inclined-plane (2) and anistree caliber (3) transitional face, inclined-plane (2) angle is the 110-112 degree, and attaching nut (4) is used to connect firmly anistree caliber and is convenient to spanner and screws.The utility model can adopt essence to cast type according to the inside nominal diameter difference, processing Dg15～250mm tandem product.

Embodiment 2

Consult shown in Figure 2ly, with the two ends of anistree caliber (3) 14～38mm that respectively extends, remove the original internal thread in two ends, all the other structures are seldom given unnecessary details at this with embodiment 1.

During installation, consult shown in Figure 3ly, the utility model is connected with four columnar radiators, casting is adopted in single, double outside thread union.Two outside thread union (7) one ends are connected with radiator (8), and the other end is connected with valve (6), and valve (6) connects heating tube (5); Single head outside thread union (9) one end outside threads are connected with radiator (8), and the other end internal thread is connected with return pipe (10).Among the figure because of having used single, double outside thread union, do not need to use the outside thread free flow coupling, as use existing internal thread union to carry out same connection, need to use three outside thread free flow couplings, and the utility model is by using material to calculate, only use the material of one and half outside thread straight-through tubes, can save material 50%, economical and practical.

Claims (1)

1. a single, double outside thread union comprises anistree caliber, attaching nut, and the one or both ends that it is characterized in that anistree caliber (3) are provided with is with externally threaded lengthening caliber (1), is connected as a single entity by inclined-plane (2) and anistree caliber (3) transitional face.

Images