CN201621413U

CN201621413U - Movable joints attached U-shaped tube

Info

Publication number: CN201621413U
Application number: CN2010201053732U
Authority: CN
Inventors: 石卫华
Original assignee: Shanghai Chunhua Electronics Co Ltd
Current assignee: Shanghai Chunhua Electronics Co Ltd
Priority date: 2010-02-01
Filing date: 2010-02-01
Publication date: 2010-11-03
Anticipated expiration: 2020-02-01

Abstract

The utility model discloses a movable joint attached U-shaped tube. which is formed by a 180 degree bending of a metal tube, the two ends of the tube are provided with sections of long and parallel straight tubes, outside which are respectively sleeved with a tube-shape movable joint, at two ends of the U-shaped tube are provided trumpet-shaped flaring, Inhibiting the sliding-out of movable joints from the U-shaped tube, the ends are parallel and level, the movable joints are provided with male thread, close to the flared position of the U-shaped tube is provided matching chamfers, one end close to the center of the U-shaped tube is provided with multiple angle heads, convenient to use tools such as a wrench. The tube in the utility mode can be used for the sleeving switch of the sleeving type heat exchanger, the U-shaped tube shell-and-tube heat exchanger, and has the beneficial effect that the inner tube of the heat exchanger is detachably cleaned and replaced.

Description

A kind of U-shaped pipe with movable joint

Technical field

The utility model relates to a kind of pipe fitting, furtherly, is a kind of U-shaped pipe with movable joint, can be used for industries such as heat exchanger, HVAC.

Background technique

The U-shaped pipe is the common pipe fittings of industry such as a kind of heat exchanger, HVAC, is usually used in connecting two straight tubes, realizes turning through 180 degree.U-shaped pipe commonly used at present all is to be bent by single metal tube to form, and does not contain other accessory.Opening end size is general to be equal to mother tube, perhaps through socket section of extruding generation or enlarging.With being connected between the straight tube, the general method that adopts welding.

Adopt the method for welding that very big drawback is arranged, on the one hand, the labor intensity of welding is big, the energy consumption height, competency profiling to labourer is also very high, on the other hand, welding is general to be adopted and the inconsistent scolder of metal tube material, the place of the easiest often generation electrochemical corrosion perforation of seam crossing, have a strong impact on the life-span of system, at last, be welded as non-dismountable connection, make the maintainable variation of system.

In order to solve the above problems, the utility model proposes a kind of U-shaped pipe with movable joint.

The model utility content

The technical solution of the utility model is as follows:

Guan Weiyi metal tube double flat of this U-shaped forms, and two ends respectively have one section parallel straight length.Metal tube can adopt copper tube, brass tube or Stainless Steel Tube, and is more common because of these several tubing, and relatively is fit to do bending and handles.The straight length outside respectively is with a tubular metal movable joint, and the internal diameter of movable joint is a bit larger tham the external diameter of straight length, can slide along straight length.There is horn-like enlarging port, U-shaped pipe two ends, and port is concordant, and the external diameter of enlarging can prevent that greater than the internal diameter of movable joint movable joint from skidding off from port, U-shaped pipe two ends.Movable joint has outside thread, the chamfering that matches is arranged near enlarging place of U-shaped pipe, has polygonal head (first-class as four angle heads, hexagonal) near a side ports of U-shaped tube hub, so that use instrument such as spanner.Movable joint can adopt brass, aluminum alloy or stainless steel to make.

Of the present utility modelly be processed as five metals processing technology commonly used, as bending, extruding, turning etc., low production cost.

In order to use the utility model, need the installation place that internal thread is arranged, and need the collocation rubber seal, though seem to have increased departmental cost, cost increases few, the benefit of bringing is significant.

Use the utility model to double pipe heat exchanger or U-shaped pipe shell-and-tube heat exchanger, have following advantage:

1, the installation labor intensity of threaded coupling is low, and the productivity height is lower to labourer's competency profiling;

2, do not consume electric power, reduced expense;

3, do not make electricity consumption, improved the Security of work;

4, connection is dismountable, makes the maintainability of system obtain strong enhancing.

Below by drawings and Examples, the technical solution of the utility model and application example are described in further detail.

Description of drawings

Fig. 1 is a schematic perspective view of the present utility model;

Fig. 2 is the section plan of first kind of form of the utility model;

Fig. 3 is the section plan of second kind of form of the utility model;

Fig. 4 is the application schematic representation of the utility model in double pipe heat exchanger;

Fig. 5 is the section plan of details I;

Fig. 6 is the application schematic representation of the utility model in U-shaped pipe shell-and-tube heat exchanger;

Fig. 7 is the section plan of details II.

Mark among the figure is as follows:

1, U-shaped pipe arcuate segment, 2, U-shaped pipe straight length, 3, the enlarging of U-shaped pipe, 4, movable joint outside thread, 5, movable joint chamfering, 6, the movable joint hexagon head, 7, metal H shape four-way, 8, double pipe heat exchanger outer tube, 9, pipe in the double pipe heat exchanger, 10, the double pipe heat exchanger rubber seal, 11, pipe in the shell-and-tube heat exchanger, 12, shell-and-tube heat exchanger rubber seal, 13, the shell-and-tube heat exchanger fixed tube sheet; I, II are details area; Filled arrows, hollow arrow are represented the flow direction of two kinds of fluids respectively.

In the accompanying drawing, watch in order not influence, the cut-away section line does not show.

Embodiment

Fig. 1 is a schematic perspective view of the present utility model, is appreciated that shape of the present utility model by Fig. 1.

The section plan of Fig. 2 for obtaining along plane, U-shaped tube's axis place, among Fig. 2, the U-shaped tube body is made up of arcuate segment 1 and straight length 2, and wherein two sections straight lengths are isometric and parallel, and port has the enlarging 3 of a miter angle.The outside of straight length is with movable joint, and movable joint has outside thread 4, near the outer end chamfering the same with flaring angle 5 is arranged, and an other end has a hexagon head 6.The internal diameter of movable joint is a bit larger tham U-shaped pipe straight length, less than the external diameter of enlarging, so movable joint can only slide at straight length.

During concrete enforcement, mother tube can adopt the red copper straight tube, because the ductility of red copper is fine, and has certain toughness.Arcuate segment can bend with pipe crimping tool, need keep straight length parallel when bending, and uses anchor clamps to guarantee in case of necessity.After bending, put ready-made in advance movable joint, do the enlarging at straight length two ends again, can use the mode of extruding or punching press to obtain.Movable joint generally uses brass or stainless steel to make, and uses ready-made hexagonal bar as far as possible, and turning adds man-hour like this, and material-saving saves time.

Fig. 3 has showed another kind of form of the present utility model, and in this form, the external diameter of straight length is bigger than arcuate segment external diameter, and this situation mainly is when the value of the external diameter of straight length or internal diameter is not the standard size of tubing, can be obtained by the mode of extruding or punching press.

Below in conjunction with the description of drawings application of the utility model in heat exchanger once, to understand practicability of the present utility model and creativeness.

Fig. 4 has showed a kind of metallic sheath tubular type heat exchanger, and the utility model is used to realize the connection of pipe in the heat exchanger.The section plan of details I part is Fig. 5.Metal H shape four-way one end and heat exchanger outer tube 8 are integrally welded among Fig. 5, and an end has internal thread, the outside thread coupling of the movable joint on this internal thread and the U-shaped pipe.There is a circular hole at the tapped port bottom of metal H shape four-way center, internal diameter is a bit larger tham pipe 9 in the heat exchanger, the straight length of U-shaped pipe is enclosed within on the interior pipe of heat exchanger, put rubber seal 10 then, movable joint is screwed into, screws, the extruding rubber seal, make it be adjacent to pipe, the enlarging of U-shaped pipe and H shape four-way in the heat exchanger, form effective seal.Like this, two kinds of fluids of the inner and outer pipes in the H shape four-way are isolated mutually, and realize that 180 degree separately turn to mobile.

Fig. 6 has showed a kind of U-shaped pipe shell-and-tube heat exchanger, and Fig. 7 is the sectional view of its details II part.Among the figure, shell-and-tube heat exchanger fixed tube sheet 13 has internal thread interface, a concentric circular hole is arranged at the bottom of threaded coupling, internal diameter is a bit larger tham pipe 11 in the heat exchanger, after pipe passes circular hole in the heat exchanger, put rubber seal 12, put the U-shaped pipe then, tighten movable joint, the turning of pipe connects in can realizing.

Above embodiment only partly is illustrated technological points, as for some known technologies that relates to, if there is omission, does not cause the infringement to practicability of the present utility model in the foregoing description.In addition, the foregoing description only is used to illustrate the technical solution of the utility model, but not limit it, still can make amendment to technological scheme or be equal to replacement according to basic principle of the present utility model, and these modifications or be equal to replacement and also can not make amended technological scheme break away from the spirit and scope of technical solutions of the utility model.

Claims

1. U-shaped pipe with movable joint is characterized in that:

Guan Weiyi metal tube double flat of this U-shaped forms, and two ends respectively have one section parallel straight length, and the outside respectively is with a tubular metal movable joint; There is horn-like enlarging port, U-shaped pipe two ends, and port is concordant, and the external diameter of enlarging is greater than the internal diameter of movable joint; Movable joint has outside thread, near enlarging place of U-shaped pipe the chamfering that matches is arranged, and a side ports of close U-shaped tube hub has polygonal head.

2. the U-shaped pipe of band movable joint according to claim 1 is characterized in that, the material of U-shaped pipe is a kind of in red copper, brass, the stainless steel.

3. the U-shaped pipe of band movable joint according to claim 1 is characterized in that, the material of movable joint is a kind of in brass, aluminum alloy, the stainless steel.

4. the U-shaped pipe of band movable joint according to claim 1 is characterized in that, the polygonal head of movable joint is a hexagon head.