CN201359461Y

CN201359461Y - Corrugated tube externally wound with metal tubelet

Info

Publication number: CN201359461Y
Application number: CNU200920300198XU
Authority: CN
Inventors: 沈卫立
Original assignee: HANGZHOU SHENSHI HEAT EXCHANGER CO Ltd
Current assignee: HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY CO., LTD.
Priority date: 2009-01-13
Filing date: 2009-01-13
Publication date: 2009-12-09
Anticipated expiration: 2019-01-13

Abstract

The utility model relates to a heat exchange pipeline, in particular to a corrugated tube externally wound with a metal tubelet. A tube body is a spiral corrugated tube body; the tubelet is arranged in a groove at the outer wall of the corrugated tube body and wound around the corrugated tube body, and the direction of the tubelet is same as the direction of the spiral corrugation. The utility model mainly provides a heat exchange corrugated tube applied in heat exchange devices, with high heat exchange efficiency as well as strong capability of bearing pressure and long service life, and solves the technical problems that in the prior art, the existing heat exchange corrugated tube can not meet highly efficient heat exchange and high pressure bearing capability simultaneously, and has short service life.

Description

Outer bellows around metallic sheath

Technical field

The utility model relates to a kind of heat exchange pipe, relates in particular to a kind of outer bellows around metallic sheath.

Background technology

Heat exchanger is widely used in industries such as heat pump, air-conditioning, commercial refrigerator, food refrigerated freezing, drier.Most heat exchanger adopts copper pipe simple in structure, easy to process as heat exchange element, but the heat exchange efficiency of unit are is low, the manufacturing cost height.In recent years, strengthening surfaces such as annular knurl, screw thread, fold occur and improved heat exchange property, as Chinese patent: " novel corrugated tube heat exchanger (CN2539124) ", the tubular of this heat exchanger heat-exchanging tube is helical corrugation shape, it combines screwed pipe and bellows advantage separately, has the advantages that heat transfer rate is high and material does not deposit.Nowadays energy growing tension for the protection ozone layer, reduces greenhouse effects, and refrigeration system adopts natural refrigerant CO ₂It is inexorable trend.But be applied to CO ₂In the refrigerating plant, because higher pressure at expulsion, bearing capacity is worthy of consideration, and above-mentioned corrugated tube heat exchanger can not can bear pressure again when guaranteeing heat exchange efficiency.Present CO ₂Gas cooler in the refrigerating plant is made coiled usually, so that can bear higher pressure at expulsion, but the heat exchange efficiency of these structures is lower again.

Summary of the invention

The utility model has mainly provided a kind of heat exchange efficiency, and to bear pressure capability high the time strong, long service life be applied in heat exchange bellows in the heat-exchange device; Solution existing in prior technology heat exchange bellows can not satisfy high efficient heat exchanging simultaneously and height bears pressure, the technical problem that service life is long.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of outer bellows around metallic sheath, described body is spiral helicine bellows body, groove at the bellows body outer wall is provided with tubule, tubule be coiled on the bellows body with spiral helicine ripple move towards identical.Body adopts bellows, has increased heat exchange area, has improved the heat exchange efficiency of metal tube; Groove coiling tubule at bellows, rationally utilized the space, adopt tubule to improve the ability of bearing pressure simultaneously, prolonged the service life of bellows, the trend of tubule moves towards identical with spiral helicine ripple, conveniently tubule is arranged in the groove, structure is more reasonable, also can improve heat exchange efficiency simultaneously.Circulation high-pressure refrigerant such as CO in the tubule ₂, another kind of medium of circulation such as water etc. carry out heat exchange by bellows and intratubular medium in bellows.

As preferably, the quantity of described tubule is less than or equal to the groove quantity on the bellows body, and described tubule is extended to the other end of bellows body along the hand of spiral by an end of bellows body.The quantity of tubule is specifically mated according to the requirement of heat exchange amount, and tubule is threaded to the other end by an end plate, the bearing capacity of easily manufactured raising bellows and heat exchange efficiency.

As preferably, described tubule is circular or oval, the external diameter of described tubule is less than or equal to the width of groove, the height of tubule is less than or equal to the degree of depth of groove, be filled with soldering flux at the bottom of the pipe of described tubule and between the groove of bellows body, tubule by the soldering integral solder on bellows body.Tubule is initially pipe, allows a small amount of distortion after the machine-shaping, can be circle or ellipse.The material of bellows can be copper, titanium, stainless steel, corronil, aluminium, copper aluminum composite pipes, and the material of tubule can to carry out soldering just passable with bellows as long as satisfy, and is generally copper, titanium, stainless steel, corronil, aluminium, copper aluminum composite pipes.The heat exchanger effectiveness height of metal tube so body and tubule all adopt metal material, is filled soldering flux simultaneously in the gap of two pipes, guaranteed the contact area between metallic sheath and the helical ripple pipe, improves heat exchange efficiency.The external diameter of tubule is less than or equal to the width of groove, and the height of tubule is less than or equal to the degree of depth of groove, makes tubule be positioned at the groove of body fully, makes the compact conformation of body, connection and reasonable arrangement.

As preferably, circulation be high-pressure refrigerant in the described tubule, and what circulate in the described bellows body is the normal pressure fluid.Two kinds of media carry out heat exchange, and the bearing capacity of tubule is strong, the cold-producing medium such as the CO of the high pressure that can circulate within it ₂, protected environment, the service life of also having improved body simultaneously.

As preferably, the external diameter of described bellows body is 5: 1～8: 1 with the ratio of the depth H of bellows, and the wall thickness of described bellows body is 0.5mm～3mm, and the caliber of described tubule is φ 4mm～φ 10mm, and wall thickness is 0.3mm～2mm.The external diameter of spiral helicine bellows has determined bellows and tubule volume ratio with the ratio of the depth H of bellows, the wall thickness of tubule is relatively thick, increases bearing capacity, and the wall thickness of bellows is relatively thin, make bellows in pressing process, have no mechanical damage, no thermograde.

As preferably, the pitch of described bellows body can change, and the angle α of the tangent line of described bellows body and the cross section of bellows body is 15 °～45 °, and pitch is 30mm～110mm, and the number of starts of described bellows body is the 1-12 head.The pitch of same tubing is transformable, so the different cross section position included angle of thread also is (15 °～45 °) that change, because the flexible limit of tube material, angle is too little, and the tubing easy deformation is broken, angle is too big, heat exchange area reduces, and metal wastage is big, changes in the above-mentioned included angle of thread, both guaranteed that it was not easy deformation fracture, metal wastage is also little.

Therefore, a kind of double-skin duct jockey of the present utility model has following advantage: 1. metallic sheath is looped around outside the spiral helicine metal tube, spiral helicine metal tube has guaranteed heat exchange efficiency, metallic sheath has increased the pressure that can bear, reach best proportioning by adjusting caliber, make that the heat exchange efficiency of whole heat transmission equipment is higher and can adopt high-pressure refrigerant to carry out heat exchange, protected environment; 2. acted on the traditional heat exchangers high voltage bearing advantage of copper pipe, heat exchange surface is twisted into the strengthening surface of helical corrugation shape, has optimized the surface texture of metal tube, has increased the heat exchange area of unit length, has formed the very helical structure of severe thermal exchange; 3. the groove width of efficient screw thread metal pipe can change, and is slightly larger than outer external diameter around metallic sheath, and soldering processes are adopted in the slit between metallic sheath and the efficient screw thread metal pipe, guarantee that contact area is abundant, and the heat exchange effect is higher; 4. screwed pipe has no mechanical damage in pressing process, tube wall thin (0.5～3.0mm), no thermograde.

Description of drawings:

Fig. 1 is the stereogram of outer bellows around metallic sheath of the present utility model.

Fig. 2 is the front view of Fig. 1.

Fig. 3 is an A-A cutaway view in Fig. 2.

Fig. 4 is the B-B cutaway view in Fig. 2.

The concrete example of implementing:

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment:

Shown in attached Fig. 1 and 2 and 3 and 4, a kind of outer bellows around metallic sheath, comprise spiral helicine bellows body 1, the external diameter of bellows body 1 is 60mm, the thickness of the tube wall of bellows body 1 is 0.8mm, the pitch P of bellows body is to change according to velocity field and pressure field that fluid flows inside and outside body, and its excursion is between 30mm～110mm, so the angle α of the cross section of the tangent line of bellows body and bellows body changes in 15 °～45 °.A number of spiral helicine bellows body 1 is 6, respectively is provided with a tubule 3 in 6 grooves 2 that form on the outer wall of bellows body 1, and tubule 3 is extended to the other end of bellows body 1 along the hand of spiral by an end of bellows body 1.Tubule 3 is elliptoid pipe, and the external diameter of tubule 3 is less than groove 2 width, and the height of tubule 3 is less than groove 2 degree of depth, and the depth H of groove 2 is 6.5mm, and the width of groove is 10.5mm.Tubule 3 integral body are positioned at the groove 2 of bellows body 1, make the monnolithic case compactness of bellows, and the height of tubule is 6mm, and the width of tubule is 10mm, and the thickness of tubule 3 is 1.5mm, has strengthened the bearing capacity of tubule 3.Bellows body 1 and tubule 3 all adopt copper product to make, and are filled with soldering flux 4 at the bottom of the pipe of tubule 3 and between the groove 2 of bellows body 1, tubule 3 by the soldering integral solder on bellows body 1.

Operation principle: make helical form at bellows body 1, increase heat exchange efficiency, be made into the bellows of varying pitch simultaneously, make when turbulence state or change in flow in process fluid flow, occurring, fluid temperature (F.T.) is instantaneous to mix, strengthened the heat exchange effect, improved the heat exchange efficiency of unit are, circulation is water in bellows body 1.That circulation is high-pressure refrigerant such as CO in the tubule 3 in the groove 2 of bellows body 1 ₂, improved the bearing capacity of body, protected environment.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims

1. outer bellows around metallic sheath, it is characterized in that: described body is spiral helicine bellows body, is provided with tubule at the groove of bellows body outer wall, tubule be coiled on the bellows body with spiral helicine ripple move towards identical.

2. outer bellows according to claim 1 around metallic sheath, it is characterized in that: the quantity of described tubule is less than or equal to the groove quantity on the bellows body, and described tubule is extended to the other end of bellows body along the hand of spiral by an end of bellows body.

3. outer bellows according to claim 1 and 2 around metallic sheath, it is characterized in that: described tubule is for oval or circular, the external diameter of described tubule is less than or equal to the width of groove, the height of tubule is less than or equal to the degree of depth of groove, be filled with soldering flux at the bottom of the pipe of described tubule and between the groove of bellows body, tubule by the soldering integral solder on bellows body.

4. outer bellows according to claim 1 and 2 around metallic sheath, it is characterized in that: the external diameter of described bellows body is 5: 1～8: 1 with the ratio of the depth H of bellows, the wall thickness of described bellows body is 0.5mm～3mm, the wall thickness of described tubule is 0.3mm～2mm, and the caliber of tubule is φ 4mm～φ 10mm.

5. outer bellows according to claim 3 around metallic sheath, it is characterized in that: the external diameter of described bellows body is 5: 1～8: 1 with the ratio of the depth H of bellows, the wall thickness of described bellows body is 0.5mm～3mm, the wall thickness of described tubule is 0.3mm～2mm, and the caliber of tubule is φ 4mm～φ 10mm.

6. outer bellows according to claim 1 and 2 around metallic sheath, it is characterized in that: the pitch of described bellows body can change, the angle α of the tangent line of described bellows body and the cross section of bellows body is 15 °～45 °, pitch is 30mm～110mm, and the number of starts of described bellows body is the 1-12 head.

7. outer bellows according to claim 3 around metallic sheath, it is characterized in that: the pitch of described bellows body can change, the angle α of the tangent line of described bellows body and the cross section of bellows body is 15 °～45 °, pitch is 30mm～110mm, and the number of starts of described bellows body is the 1-12 head.