CN201096470Y - Corrugated tube type heat converter - Google Patents

Abstract

The utility model discloses a tube strip type heat exchanger used on the construction machinery, which adopts the mode of increasing the length of a built-in turbulent flow piece of a radiator pipe of the tube strip type heat exchanger to improve the condition that the welding part of a pipe and a main board is easy to be broken under external force in the prior art. In the utility model, the two ends of the turbulent flow piece extend toward two sides so as to reach the main board and have the overlapping length with the main board of at least one third of thickness of the main board, and meanwhile, the turbulent flow piece does not extend out of the main board. The intensity of the welding part of the pipe and the main board is greatly enhanced under the premise of unobvious increasing of pressure drop due to the supporting function of the turbulent flow piece by adopting such a structure.

Description

A kind of tube-strip style heat exchanger

Technical field

The utility model relates to a kind of engineering machinery, and tube-strip style heat exchanger is wrapped in its cooling specifically.It can be widely used in fields such as engineering machinery and mining machinery.

Background technology

On engineering machinery and mining machinery, because work under bad environment, vibration, cold cycling and pressure pulse can make pipe racks structure heat exchanger distortion or tired and cause leakage failure usually, and failure site focuses mostly at pipe and mainboard weld.Its main cause is by analysis as can be known: in design usually, fall for avoiding too high pressure, the tube-strip style heat exchanger pipe passes the part of stretching out behind the mainboard and can not be provided with oversizely, has only about 2mm usually.Yet the termination of built-in turbulent sheet is but usually than more than the short 5mm of pipe in the pipe.Because the thickness of mainboard is less, after the welding, remains at a determining deviation between turbulent sheet termination and the mainboard.On this intersegmental distance, pipe is done usefulness because of the support that lacks turbulent sheet, and its relative intensity is the most weak.Therefore, when being subjected to vibration, distortion, extruding and masterpiece times spent such as heat expansion, this intensity the easiest damage in the most weak position on the pipe, thus cause leakage failure.Under this background, the length of turbulent sheet makes it extend to mainboard in the redesign pipe, so just can effectively improve the service life of tube-strip style heat exchanger on engineering machinery.

Summary of the invention

To be solved in the utility model is the above-mentioned defective that prior art exists, aim to provide a kind of new tube-strip style heat exchanger tube assembly structure, can effectively eliminate or reduce tube-strip style heat exchanger because of the defective of expanding with heat and contract with cold, leakage failure takes place factor such as vibration, compression shock.

The technical scheme that addresses the above problem employing is: a kind of tube-strip style heat exchanger, the turbulent sheet that comprises mainboard, pipe and be arranged on tube interior is characterized in that described turbulent sheet two ends stretch out described both sides mainboard inner surface.

Described turbulent sheet two ends are stretched out the length of mainboard inner surface portion and are advisable with 1/3 of mainboard body thickness.Also can design longlyer as required.Because expand tube needs during welding, described tube end should grow turbulent sheet end 1.5～3mm.

After the said structure improvement, on the one hand, owing to increased turbulent leaf length, its end has extended to the mainboard position, and this makes the whole piece pipe all obtain the support of turbulent sheet, and its intensity increases greatly.Problems of the prior art have obtained good improvement.On the other hand, after tested and experiment showed, and increase turbulent leaf length, can obviously not improve pressure and fall, fall influence, improve the service life that turbulent leaf length can effectively improve heat exchanger mechanical life with respect to pressure.

Description of drawings

Fig. 1 is the tube-strip style heat exchanger structural representation.

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

Fig. 3 is a mainboard structure schematic diagram commonly used.

Fig. 4 is that the A-A of Fig. 3 is to profile.

Fig. 5 is pipe commonly used and internal structure schematic diagram thereof.

Fig. 6 is the right view of Fig. 5.

Fig. 7 is tube assembly and a mainboard assembling back structural representation in the prior art.

Fig. 8 is the utility model tube assembly and mainboard assembling back structural representation.

The specific embodiment

With reference to Fig. 1, Fig. 2, the tube-strip style heat exchanger that the utility model relates to comprises import 6, enters chamber 7, mainboard 1, pipe 2, fin 3, go out chamber 4 and export 5.In the present embodiment, the tube-strip style heat exchanger main part mainly is arranged between the two parallel mainboards 1 by a row, and flat tube 2 compositions that are parallel to each other, and described facing mutually is provided with fin 3 between the pipe 2.Heat eliminating medium can flow through from the space of facing mutually between the fin 3, and the outside of described two mainboards 1 is respectively entering chamber 7 and going out chamber 4 of heat eliminating medium, and each chamber all has opening 6,5, described each pipe 2 internal cavities with enter chamber 7 and go out chamber 4 and all be communicated with.During work, the heat radiation material enters into chamber 7 from import 6 earlier, is flow to each parallel pipe 2 by branch then and carries out heat exchanging process, through the poly-chamber of getting back to out, pipe 2 heat radiation backs, flows out from outlet at last.

With reference to Fig. 3, Fig. 4, Fig. 5, Fig. 6, described mainboard 1 sheet that is rectangle is arranged side by side a plurality of pipe soldering openings 8 on its length direction.Be provided with the turbulent sheet 9 of wave cross sectional shape in the described flat tube 2, described turbulent sheet 9 is than the short certain-length of pipe, shown in L among the figure.

With reference to Fig. 7, in present technology, because turbulent sheet 9 is shorter, after assembling with mainboard 1, still there is a spacing L1 its end apart from mainboard 1 inner surface.Because 9 pairs of pipes 2 of turbulent sheet have supporting role, near one section of itself and mainboard 1 weld, because lack the supporting role of turbulent sheet 9, intensity is very weak, damages under external force effects such as cold cycling and vibration easily at pipe 2 two ends.In addition, the support of 9 pairs of pipe 2 interludes of turbulent sheet can cause the contrast of interlude and two ends intensity difference obviously, and like this, the pipe two ends will afford bigger stress, make it easier damage.

With reference to Fig. 8, in the utility model, turbulent sheet 9 length after the improvement are more of the prior art longer, after the mainboard assembling, its end can reach mainboard and be at least the thickness L3 of 1/3 mainboard main body with mainboard overlap length L2, and turbulent sheet does not stretch out mainboard simultaneously.Expand tube needs when welding for satisfying, described pipe stretches out mainboard 2～2.5mm.

What should be understood that is: the foregoing description is just to explanation of the present utility model, rather than to restriction of the present utility model, any innovation and creation that do not exceed in the utility model connotation scope all fall within the protection domain of the present utility model.

Claims (3)

1, a kind of tube-strip style heat exchanger comprises mainboard (1), pipe (2) and is arranged on the inner turbulent sheet (9) of pipe (2), it is characterized in that described turbulent sheet (9) two ends stretch out described mainboard (1) inner surface.

2, the 1/3-1 that a kind of tube-strip style heat exchanger according to claim 1, the length (L2) that it is characterized in that described turbulent sheet (9) two ends and mainboard (1) lap are at least mainboard body thickness (L3) doubly.

3, a kind of tube-strip style heat exchanger according to claim 2 is characterized in that described pipe (2) two ends stretch out mainboard (1) 2～2.5mm.

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