CN201246993Y

CN201246993Y - Internal tooth type hot-extrusion aluminum tube

Info

Publication number: CN201246993Y
Application number: CNU2008201502170U
Authority: CN
Inventors: 刘卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-05-27
Anticipated expiration: 2018-06-30

Abstract

The utility model relates to an internal-tooth hot extrusion aluminum pipe, which relates to an aluminum pipe whose internal surface is provided with a tooth shape. The utility model is characterized in that an inner tooth (2) whose cross section shape is respectively a triangular shape, a saw shape, a sinusoidal shape, a rectangle shape or a circular shape is arranged on the inner wall of the aluminum pipe. The function of the internal-tooth hot extrusion aluminum pipe is the same with an existing inner-screw copper pipe, however, the specific weight is three times lighter than the inner-screw copper pipe, and the cost is three times lower than the inner-screw copper pipe. The utility model has the advantages of saving a great amount of copper sources and lowering production cost, and the inner surface area can be increased 2 to 3 times according to different pipe diameters, tooth shapes and number of rack bars, thereby improving 1.5-2 times of energy efficiency ratio. The internal-tooth hot extrusion aluminum pipe is made through adopting a hot extrusion method, which can be made into a coil pipe, is convenient for transporting, greatly lowers transportation cost, and can be widely used in domestic air conditioners, automobile air conditioners, condensers, ice houses and the like, and the effect of the utility model is the same with an inner-screw copper pipe.

Description

Inner tooth type hot extrusion aluminum pipe

Technical field

Inner tooth type hot extrusion aluminum pipe relates to the aluminum pipe that a kind of inner surface is provided with profile of tooth, and this aluminum pipe is particularly useful for the pipeline that the refrigeration system in fields such as the condenser, solar energy of various refrigerators, freezer, air-conditioning (domestic air conditioning and air conditioning for automobiles), chemical industry and electric power is used.

Background technology

Modern refrigeration pipe system (as refrigerator, air-conditioning, the freezer) pipeline of usefulness adopts the inner screw thread copper pipe of efficient heat transfer mostly.Use inner screw thread copper pipe can improve the Energy Efficiency Ratio of refrigeration system, reach requirement energy-conservation and the adaptation novel refrigerant.The inner surface major part of this inner screw thread copper pipe is provided with the internal thread that flute profile is tall and thin tooth, intersection tooth, M shape tooth, interrupted tooth, stage teeth.In order to improve the heat exchange effect, increase the service life, reduce the copper pipe consumption, China's utility model patent " Composite tooth type internal thread brass " (patent No. 200620130254.6), the internal thread profile of tooth that internal tooth is designed to have at least two kinds of shape of cross sections to be respectively M and A shape alternately repeats to be evenly arranged in the copper pipe inwall.It is the excessive shape of R circular arc that Chinese invention patent application " riffled tube and preparation method thereof " (number of patent application 200510033957.7) discloses a kind of thread core head surface spiral fluted both sides of adopting, the diameter of spinning steel ball is 10～20 millimeters and carries out spinning grooving formation inner screw thread copper pipe, being fit to make external diameter is 1～7 millimeter, thick 0.10～0.25 millimeter of diapire, tooth depth is 0.13～0.30 millimeter, addendum angle is the inner screw thread copper pipe of 5～27 degree, this inner screw thread copper pipe can improve the heat-exchange capacity of refrigeration system, unit copper pipe use amount reduces 5%-8%, has reduced cost.China's utility model patent " is saved the female screw heat-transfer pipe of copper material " (patent No. 93243162.3), it is characterized in that on the inwall of steel pipe compound one deck has the copper pipe of internal thread, advantage is to save copper material more than 65% than fine copper riffled tube, and improves mechanical strength more than 1 times.But along with climbing up and up of international copper valency, all improvement still can't solve the expensive difficult problem of product that rise in price brings.

Summary of the invention

The purpose of this utility model is a kind of inner tooth type hot extrusion aluminum pipe of design, this inner tooth type hot extrusion aluminum pipe cheap, and performance is identical with inner screw thread copper pipe, thereby can all replace inner screw thread copper pipe.

In order to achieve the above object, the utility model has carried out the discovery that studies for a long period of time to the inner tooth type aluminum pipe which kind of flute profile aluminum pipe is processed into: because strength character, the welding performance of aluminum pipe, corrosion resisting properties etc. all are not so good as copper pipe, are processed into traditional flute profile with conventional method and are difficult to obtain the inner tooth type aluminum pipe.But in copper resource poorness and copper valency rise situation for the moment under the insoluble situation relatively, seek a kind of geometry that changes the aluminum pipe inner surface, the aluminum pipe of the different inner tooth types of the heat transfer of condensation and evaporation, heat transfer characteristic is extremely urgent thing in increasing internal surface area and adapting to refrigeration system.Those skilled in the art know, the soft attitude of aluminum pipe body that traditional hot extrusion method is produced can indefinite length, forms coil pipe, but can only produce light inwall aluminum pipe.The utility model has overcome because the intrinsic physicochemical characteristic of aluminium, process the difficulty that hot extrusion method etc. is difficult to produce cooling inner tooth type aluminum pipe continuously with tradition, has obtained inwall and has had inner tooth type hot extrusion aluminum pipe as lower toothed.

Concrete structure and shape facility are: be provided with shape of cross section and be respectively triangle, zigzag, sinusoidal, rectangle or circular internal tooth in the aluminum pipe tube wall.

The utility model has the advantages that:

1. because being inwall at aluminum pipe, the utility model is provided with the internal tooth that shape of cross section is respectively triangle, zigzag, sinusoidal or rectangle, therefore, Energy Efficiency Ratio of the present utility model is identical with existing inner screw thread copper pipe, but the weight ratio inner screw thread copper pipe is light three times, price is lower three times than inner screw thread copper pipe, the advantage that has a large amount of saving copper resources and reduce production costs.

2. because the utility model can be according to the difference in the field of use, press different tube diameters change profile of tooth and tooth bar quantity from 40～75, its internal surface area can both increase by 2～3 times more than, thereby Energy Efficiency Ratio improves 1.5～2 times, can be widely used in domestic air conditioning, air conditioning for automobiles, condenser, freezer etc., effect is identical with inner screw thread copper pipe.

3. the utility model has been broken through the tradition that adopts hot-extrusion method can only produce light circle aluminum pipe, adopt special mould etc. to eliminate the defective that easy fracture can't be continuously extruded, the aluminum pipe coil pipe quality that the inner surface of making is provided with profile of tooth is good, is convenient to transportation, reduces cost of transportation greatly.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is that A of the present utility model is to view

Fig. 3 is a profile of tooth enlarged diagram of the present utility model

Fig. 4 is shaped as the local enlarged diagram of lance tooth for wall cross-section of the present utility model

Fig. 5 is shaped as the local enlarged diagram of sinusoidal tooth for wall cross-section of the present utility model

Fig. 6 is shaped as the local enlarged diagram of serrated teeth for wall cross-section of the present utility model

Fig. 7 is shaped as the local enlarged diagram of rectangular teeth for wall cross-section of the present utility model

Fig. 8 is shaped as the local enlarged diagram of round tooth for wall cross-section of the present utility model

Label declaration in the accompanying drawing is as follows:

1-aluminum pipe tube wall; 2-internal tooth.

The specific embodiment

See also Fig. 1～8.Earlier according to instructions for use, select aluminum pipe tube wall 1 satisfactory aluminum pipe, and the shape of cross section of aluminum pipe inner surface is a triangle, zigzag, sinusoidal, rectangle or circular internal tooth 2, calculate the bar of internal tooth 2 then and count N and tooth depth H, require design and make the special mould that the bar that meets internal tooth 2 is counted N and tooth depth H requirement according to hot extrusion technique again, again special mould is packed in the heat extruder, then sending in the heat extruder through the preliminary treatment of charging preceding working procedure and the aluminum pipe of processing, according to extruded aluminum tube ascending temperature section, automatically inlet amount and discharging pipe amount are adjusted in control, after later process handle the pipe tolerance, the flute profile precision is controlled in the accurate mass range, and production obtains internal tooth shape of cross section of the present utility model and is respectively triangle continuously, zigzag, sinusoidal, rectangle or circular inner tooth type aluminum pipe.Aluminum pipe external diameter of the present utility model is 5.0～22.2 millimeters; The tooth bar quantity N of its internal tooth 2 is 40～75.

Claims

1. inner tooth type hot extrusion aluminum pipe is characterized in that: be provided with shape of cross section and be respectively triangle, zigzag, sinusoidal, rectangle or circular internal tooth (2) in aluminum pipe tube wall (1).