CN106736328B

CN106736328B - Processing technology of multi-ligament spoiler

Info

Publication number: CN106736328B
Application number: CN201611082563.5A
Authority: CN
Inventors: 谭勇
Original assignee: Chongqing Yuqing Machinery Manufacture Co ltd
Current assignee: Chongqing Yuqing Machinery Manufacture Co ltd
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2021-02-09
Anticipated expiration: 2036-11-30
Also published as: CN106736328A

Abstract

The patent relates to the technical field of heat exchanger equipment, and discloses a processing technology of a multi-ribbon spoiler, which adopts a metal sheet as a processing raw material and comprises the following steps: heat treatment, edge cutting treatment, crater welding, twisting forming, cooling and assembling to prepare the multi-ligament turbulent flow piece. Compared with the existing common tie, the turbulence piece processed by the technical scheme has the advantages that the turbulence effect is enhanced, the heat exchange efficiency is improved, and compared with the existing opposite tie, a larger gap is formed between the tie, the resistance to water flow is small, and the comprehensive performance is stronger.

Description

Processing technology of multi-ligament spoiler

Technical Field

The invention relates to the technical field of heat exchanger equipment.

Background

Tubular heat exchangers, which are the most typical dividing wall type heat exchangers, have a long history of industrial application and have been dominant in all heat exchangers to date. The tubular heat exchanger mainly comprises a shell, a tube bundle, a tube plate, a seal head and the like, wherein the shell is mostly circular, the parallel tube bundle is arranged in the shell, and two ends of the tube bundle are fixed on end plates. The tube bundle is connected with spiral bands (also called twist iron, bands, spiral flat steel and the like) in a rotating way, and the spiral bands are mainly used for improving the heat exchange efficiency. When fluid enters the heat exchange tube, the spiral band enables the fluid to enter a turbulent flow state, a tube wall retention layer is broken, the contact area of the fluid and the tube wall of the heat exchange tube is increased (namely, the heat exchange efficiency is improved), and the dirt on the tube wall can be washed by the turbulent fluid.

The existing processing equipment for the spiral links comprises a compression roller machine, a trimming machine, a fixed roller, a baking device, a rotary stretching device, an automatic cutting machine, an air cooling device and the like, wherein thin steel sheets are conveyed to the trimming machine from the compression roller machine, the trimming machine cuts the thin steel into sheets meeting the specified width, the sheets enter the baking device after passing through the fixed roller to be subjected to heat treatment, the sheets subjected to heat treatment are stretched and rotated by the rotary stretching device, the two ends of the sheets are fixed by the rotary stretching device, one end or two ends of each rotary sheet are simultaneously rotated in opposite directions to enable the sheets to be twisted to form the spiral links, and the spiral links are cut by the automatic cutting machine (namely, the spiral links with the specified length are cut) and then are shaped and cooled by.

Researchers at home and abroad carry out a plurality of researches on fluid flow and enhanced heat transfer in a built-in tie tube, and mainly aim at special ties which are improved on the basis of common ties, such as edge opening ties, sawtooth ties, central opening ties, double ties, folding ties, staggered ties and the like. Compared with the common ligament, although the strengthening effect of the special-shaped ligament is improved to a certain extent, the generated fluid flow resistance is correspondingly increased, and the comprehensive performance needs to be further improved.

Disclosure of Invention

The invention aims to provide a processing technology of a multi-ligament spoiler, which can effectively improve the heat exchange efficiency of ligaments and reduce the resistance to water flow.

In the scheme, the processing technology of the multi-ligament spoiler adopts the metal sheet as a processing raw material and comprises the following steps:

s1, heat treatment: heating and thinning the sheet material through a high-temperature press roller;

s2, trimming: cutting the excess material of the side edges of the sheet along the length of the sheet;

s3, welding craters are drilled: drilling arc-shaped openings for welding on two side edges of the sheet;

s4, torsion forming: forming the sheet material into a twisted belt by rotating along the arc-shaped openings on the two side edges of the sheet material and around the central line of the sheet material;

s5, cooling: cooling the ligament in an air cooling mode;

s6, assembling: and (4) welding and assembling the three ligaments by taking the arc-shaped openings in the step S3 as welding points, so that the arc-shaped openings of the three ligaments are overlapped, and the included angle between every two adjacent ligaments is 120 degrees, thereby manufacturing the multi-ligament type turbulence piece.

The working principle is as follows: the high-temperature press roller can transport the sheet while heating and thinning the sheet, and transport the sheet to the next process; the edge cutting treatment can cut off irregular materials at the edges of the sheet materials, so that the processing is convenient; the arc-shaped openings are drilled on the side edges of the sheets, so that the welding area can be increased, the welding strength is improved, and meanwhile, the arc-shaped openings are mutually supported, so that the connection of the turbulence piece is firmer compared with that of single welding connection; the button is rotated and deformed along the arc-shaped opening, so that the button is turned over intermittently, the overall turbulence of the button is irregular, and the turbulence effect is better; because this many ligaments vortex piece has a plurality of ligaments welding combination to form, in a plurality of ligaments acted on the tube bank simultaneously promptly, effectively improved vortex efficiency, the heat transfer is effectual.

Has the advantages that: compared with the existing common tie, the turbulence piece processed by the technical scheme has the advantages that the turbulence effect is enhanced, the heat exchange efficiency is improved, and compared with the existing opposite tie, a larger gap is formed between the tie, the resistance to water flow is small, and the comprehensive performance is stronger.

Further, the step S2 ensures that the length of the sheet after the trimming process is 12 times the width. Because the three ligaments are assembled, the length-width ratio of the ligaments needs to be adjusted correspondingly.

Further, the thinning process in the step S1 ensures that the thickness of the sheet is 25 to 30 times the width of the sheet. When the thickness is less than 25 times of the width of the sheet material, namely the thickness is too thin, the strength of the ligament cannot be ensured; when the thickness is more than 30 times the width, i.e., the thickness is too thick, i.e., the cross-sectional area of the ligament is large, the obstruction to the water flow is large.

Further, the torsion angle in step S4 is 75 °, and the turbulent flow of the ligament is good at this angle, and the sheet is not broken due to excessive torsion, i.e. the overall performance is strongest.

Further, on the same side of the sheet in the step S3, the distance between the adjacent arc-shaped openings is 1.5 times the width of the sheet. Namely, the distance of the twisted part of the sheet is 1.5 times of the width of the sheet, and the shorter the distance, the higher the turbulence coefficient is, but the sheet is easy to break; the longer the distance, the lower the turbulence coefficient, although the longer the distance, the lower the turbulence coefficient, thus ensuring the best overall performance of the ligament under the condition of the distance.

Drawings

FIG. 1 is a schematic structural diagram of a supporting apparatus of an embodiment of a processing technique of a multi-ligament spoiler of the present invention;

FIG. 2 is a schematic structural view of a single ligament processed in accordance with the present invention;

FIG. 3 is a schematic structural view of a machined multi-ligament spoiler of the present invention;

FIG. 4 is a schematic side view of a multi-ligament spoiler manufactured in accordance with the present invention.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a bottom plate 1, a vertical column 11, a cross beam 12, a mounting frame 2, a compression roller 21, a drill floor 3, a stepping motor 31, a sliding block 32, a drill rod 33, a torsion mechanism 4, a left support 411, a right support 412, a left rotating ring 421, a right rotating ring 422, a driving gear 43, a driven gear 44, a rotating motor 45 and a welding point 5.

The processing equipment matched with the invention is shown in figure 1: the base is installed subaerial to improve the intensity of holding surface, hot pressing roller mechanism, drilling mechanism and torsion mechanism 4 install on the base in proper order, and this base includes bottom plate 1 and welds four vertical posts 11 on bottom plate 1, and welds crossbeam 12 on vertical post 11 top.

Hot press roller mechanism is including installing mounting bracket 2 on bottom plate 1, and mounting bracket 2 installs the compression roller 21 of two high temperatures of arranging from top to bottom, leaves the clearance between the compression roller 21, and this clearance is the standard thickness of processing sheet, and hot press roller mechanism heats the sheet, makes the sheet be heated and extrusion deformation, guarantees simultaneously that the sheet has certain flexibility, the later stage drilling mechanism of being convenient for and torsion mechanism 4's processing, and hot press roller mechanism has still realized the transportation function of sheet simultaneously.

Open on crossbeam 12 has the bar hole, and the downthehole cooperation of bar has slider 32, and step motor 31 is installed along the slip direction to the one end of slider 32, and step motor 31's output pole and slider 32 bolted connection have outwards extended arrangement on crossbeam 12 to install step motor 31's mount table. The lower end of the sliding block 32 is provided with a drill rod 33, the bottom plate 1 is provided with a drill floor 3, the drill floor 3 is positioned under the drill rod 33, and the drill floor 3 is provided with two circular grooves which are respectively positioned at two drilling stations of the sheet material, so that the drill rod 33 is prevented from being excessively drilled and contacting with the drill floor 3, and the drill rod 33 and the drill floor 3 are prevented from being damaged.

Torsion mechanism 4 is including welding left socle 411, the right branch frame 412 on bottom plate 1, and left socle 411 is opened there is left round hole, installs left rotating ring 421 through ball bearing in the left round hole, and it has the right round hole relative with left round hole to open on the right branch frame 412, installs right rotating ring 422 through ball bearing in the right round hole, and the collar extension of left rotating ring 421 is relative with the portion of tailorring on the right side. Two parallel clamping blocks are fixed between the left rotating ring 421 and the right rotating ring 422 through bolts, and grooves are formed in the inner sides of the clamping blocks, and the groove width of each groove is the same as the thickness of a sheet. The beam 12 is welded with a mounting plate between the left rotating ring 421 and the right rotating ring 422, a driving gear 43 is mounted on the mounting plate, and the driving gear 43 is in key connection with an output shaft of a motor mounted on the beam 12. The driving gear 43 is engaged with a semicircular driven gear 44, and both ends of the non-gear surface of the driven gear 44 are welded to the two holding blocks. The driving gear 43 rotates to drive the driven gear 44 to rotate, the driven gear 44 drives the clamping block welded with the driven gear to rotate, and the left rotating ring 421 and the right rotating ring 422 which are connected with the clamping block through bolts synchronously rotate.

The processing flow of the invention is as follows:

1. the sheet is subjected to a heat treatment, the sheet passes along the heating nip between the press rollers 21, and the sheet is heated and thinned.

2. The sheet material is conveyed to advance along the hot pressing roller mechanism, the drilling mechanism and the twisting mechanism 4 in sequence; before that, the sheet should be subjected to edge cutting treatment, and the sheet is cut along the length direction of the sheet to form the sheet with the specified width.

3. The sheet passes through the drilling mechanism, the stepping motor 31 drives the sliding block 32 to slide so as to move the drill rod 33, when the drill rod 33 moves to a corresponding station, the drill rod 33 is started to drill, and arc-shaped openings are drilled on two edges of the sheet respectively.

4. The sheet penetrates into an inner side groove of the clamping block (the groove is parallel to the sheet conveying direction at the moment), when the arc-shaped opening is positioned in the inner side groove of the clamping block, the motor drives the driving gear 43 to rotate so as to drive the driven gear 44 to rotate, the driven gear 44 drives the clamping block to rotate, the clamping block drives the sheet to twist by 75 degrees (namely, the groove and the sheet conveying direction form an included angle of 75 degrees at the moment), and a single link is formed after the arc-shaped opening of the sheet is twisted; and opening the clamping block, and driving the sheet to continuously advance by the hot-press roller mechanism to process the next arc opening station.

5. The ligaments are cooled, generally by means of air cooling, and the single ligament finished product is shown in fig. 2.

6. And (3) welding the three ligaments along the arc-shaped opening, wherein welding points 5 are shown in fig. 3 and 4, and an included angle between every two adjacent ligaments is 120 degrees, namely, the multi-ligament spoiler is processed.

The above description is only an example of the present invention, and the common general knowledge of the known specific schemes and characteristics in the schemes is not described herein too much. It should be noted that, for those skilled in the art, without departing from the scope of the invention, several variations and modifications can be made, which should also be regarded as the protection scope of the invention, and these will not affect the effect of the implementation of the invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A processing technology of a multi-ligament spoiler adopts a metal sheet as a processing raw material, and is characterized by comprising the following steps:

s4, torsion forming: the method comprises the following steps of (1) carrying out rotary forming along arc-shaped openings on two side edges of a sheet and around the center line of the sheet to manufacture a tie, specifically, clamping and fixing the arc-shaped openings of the sheet, clamping the sheet part between the adjacent arc-shaped openings and twisting by 75 degrees, so that the clamped and rotated part of the sheet is bent, and twisting the arc-shaped openings of the sheet to form the tie;

s5, cooling: cooling the ligament in an air cooling mode;

2. The processing technology of the multi-ligament spoiler of claim 1, wherein: the step S2 ensures that the sheet length is 12 times the sheet width after the trimming process.

3. The processing technology of the multi-ligament spoiler of claim 2, wherein: the thinning-out process in the step S1 ensures that the sheet thickness is 25 to 30 times the sheet width.

4. The processing technology of the multi-ligament spoiler of claim 3, wherein: the torsion angle in step S4 is 75 °.

5. The processing technology of the multi-ligament spoiler of claim 4, wherein: the distance between the adjacent arc-shaped openings on the same side of the sheet in the step S3 is 1.5 times the width of the sheet.