CN211613867U

CN211613867U - Integral type spiral finned tube rolling mill

Info

Publication number: CN211613867U
Application number: CN201922257495.7U
Authority: CN
Inventors: 沈晓青
Original assignee: Yangzhou Minyang Heat Transfer Technology Co ltd
Current assignee: Yangzhou Minyang Heat Transfer Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-10-02
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses an integral spiral finned tube rolling mill, which comprises a frame, three rolling cutter devices arranged in a triangle shape on the frame, a power mechanism and a guide mechanism; the cutter is provided with fin forming dies capable of extruding metal to form fins, the forming dies are spirally distributed on the outer surface of the cutter, and through hole forming columns parallel to the rolling die shaft are arranged between adjacent fin forming dies. The utility model aims at improving the traditional finned tube rolling mill, matching with a special cutter and then processing a sheet-rolling finned tube with a through hole at one time.

Description

Integral type spiral finned tube rolling mill

Technical Field

The utility model belongs to finned tube processing equipment field, concretely relates to integral spiral finned tube rolling mill.

Background

The finned tube element has no thermal resistance and long service life and good performance, and the heat exchange element is mainly used for matching and applying power station, metallurgy, petrifaction, power and industrial and agricultural exchange and is more suitable for matching with a heat exchange device under severe working conditions.

The high finned tube generally refers to a finned tube with the fin height of 5-15mm, and the double-metal rolled fin finned tube also belongs to the high finned tube, so that the problem that the heat exchange performance is unfavorable due to thickening of speed and temperature boundary layers caused by excessively long distance of fluid flowing through the surface of the fin cannot be avoided, the heat exchange performance of the air side outside the tube is low, and the heat exchange coefficient is well improved is always the problem of the high finned tube.

The effect that sets up the through-hole on the fin is unanimous with the effect that current slotted on the fin, can increase gaseous disturbance effect, improves heat transfer performance. The fins of the rolled fin type finned tube are rolled, so that the slots are difficult to open on the fins, and the through holes are simultaneously rolled in the rolling process and can be finished only by a cutter and a rolling machine with improved structures.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model discloses a not enough to prior art exists, the purpose of the utility model is to improve traditional finned tube rolling mill, cooperate special cutter, and then the disposable processing has the rolling piece formula finned tube of through-hole.

The technical scheme is as follows: in order to realize the purpose of the utility model, the utility model discloses a technical scheme as follows:

an integral spiral finned tube rolling mill comprises a frame, three rolling cutter devices arranged on the frame in a delta shape, a power mechanism and a guide mechanism;

the three rolling cutter devices have the same structure and respectively comprise a cutter, a rolling mould shaft seat, a rolling mould seat, a guide rail seat, an oil cylinder seat, a guide rail and an oil cylinder; the cutter is arranged on three rolling die shafts through die sleeves respectively, the rolling die shafts are limited on a rolling die shaft seat by fixing nuts, the rolling die shaft seat is fixed on a rolling die seat, the rolling die seat is connected with a guide rail seat, and the guide rail seat is matched with a guide rail of an oil cylinder seat in a sliding way and is connected with an oil cylinder column of an oil cylinder;

the cutter is provided with fin forming dies capable of extruding metal to form fins, the forming dies are spirally distributed on the outer surface of the cutter, and through hole forming columns parallel to the rolling die shaft are arranged between adjacent fin forming dies.

Preferably, each cutter is provided with 20-30 fin forming dies; the through hole forming column 4 is arranged in a cavity between the 8 th fin forming die and the 12 th fin forming die.

Preferably, the length of the through hole forming column is larger than the distance between adjacent fin forming dies, one end of the through hole forming column is fixed on the fin forming dies, and the other end of the through hole forming column is not fixed.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following: the traditional finned tube rolling mill is improved and matched with a special cutter, and then a rolled fin type finned tube with a through hole is processed at one time. The rolled fin type finned tube has the same performance as a slotted fin, the disturbance effect of gas can be increased, and the heat exchange performance is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention, wherein 1, tube, 2, fin;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic view of the process of pressing the cutter 8 and the tube 1.

Detailed Description

The present invention will be further clarified by the following embodiments, which are implemented on the premise of the technical solution of the present invention, with reference to the attached drawings, and it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention.

The utility model discloses an integral spiral finned tube rolling mill, include the frame, install three roll-in cutter device, power unit and guiding mechanism that are article font and arrange in the frame.

As shown in fig. 2, the three rolling cutter devices have the same structure, and each rolling cutter device comprises a cutter 8, a rolling mold shaft 9, a rolling mold shaft seat 13, a rolling mold seat 14, a guide rail seat 15, an oil cylinder seat 16, a guide rail 17 and an oil cylinder 18. The cutter 8 is respectively arranged on three rolling die shafts 9 through die sleeves 11, the rolling die shafts 9 are limited on a rolling die shaft seat 13 through fixing nuts 12, the rolling die shaft seat 13 is fixed on a rolling die seat 14, the rolling die seat 14 is connected with a guide rail seat 15, and the guide rail seat 15 is matched with a guide rail 17 of an oil cylinder seat 16 in a sliding mode and is connected with an oil cylinder column 19 of an oil cylinder 18. The three rolling cutter devices are provided with hydraulic driving devices to drive the cutters 8 to do pressing movement, so that radial pressure is provided for the rolling pipe bodies 1.

As shown in fig. 1, the power mechanism comprises a universal coupling 20, a motor 21, a reduction box 23, a small chain wheel 22, a chain 24, a shaft sleeve hole 25, a large gear shaft sleeve 26, a large chain wheel 27, a large gear 28, a small gear 29, a gear box 30, a universal coupling 31 and a transmission shaft 32. The motor 21 is decelerated by the reduction box 23, the small chain wheel 22 on the output shaft of the reduction box 23 drives the large chain wheel 27 through the chain 24, and then drives the large gear 28, the large gear 28 drives the three small gears 29 in the gear box 30 to rotate, as the gear shaft of the small gear 29 is connected with one end of the transmission shaft 32 through the universal coupling 31, and the other end of the transmission shaft 32 is connected with the rolling die shaft 9 through the universal coupling 20, the rolling die shaft 9 is driven to rotate, and the cutters 8 respectively fixed on the three rolling die shafts 9 are rotated.

The tube 1, which is held by the tool 8 and in the sleeve hole 25 of the bull gear sleeve 26 of the bull gear 28, is moved from left to right and is received by the guide mechanism.

As shown in fig. 1, the guiding mechanism includes a guiding platform 39, an upper roller frame seat and a lower roller frame 40 are respectively arranged on the guiding platform 39, the upper roller frame seat is hinged with an upper roller frame 37, the upper roller frame 37 is pivoted with a pair of upper rollers 41, the lower roller frame 40 is pivoted with a lower roller 35, a guiding roller 33 is clamped between the upper rollers 41 and the lower roller 35, and a guiding roller shaft 36 of the guiding roller 33 is supported at the lumen opening of the tube body 1.

As shown in fig. 3, the cutter 8 has fin forming dies 3 capable of extruding metal to form fins, the forming dies 3 are spirally distributed on the outer surface of the cutter 8, and through-hole forming columns 4 parallel to the roller die shaft 9 are provided between adjacent fin forming dies 3.

With reference to fig. 1, 2 and 3, the working principle of the present invention is: the hydraulic system of the rolling cutter device works, oil is fed through an oil pipe 34 of an oil cylinder, an oil cylinder column 19 of the oil cylinder 18 extends, a guide rail seat 15 is pushed to move, a rolling die seat 14 moves until a rolling die shaft seat 13 moves to enable cutters 8 on three rolling die shafts 9 to be in contact with a pipe body 1, radial pressure is applied to the pipe body 1 to form a fin 2, through holes are processed on the fin 2 under the action of a fin forming die 3 on the cutters 8, the effect is the same as that of the existing slots formed on the fins of the fin pipe, the disturbance effect on gas is increased, the heat transfer efficiency and the heat exchange performance of the gas side outside the pipe are improved, and the heat exchange coefficient is well improved.

The transmission mechanism drives the rolling die shaft 9 to rotate, the rolling die shaft 9 drives the cutter 8 to rotate, and the pipe body 1 moves from left to right under the simultaneous action of the cutter 8 and the large gear shaft sleeve 26 on the large gear 28 and is received by the guide mechanism. And finishing the integral fin 2.

As can be seen from fig. 3, when the cutting tool 8 rolls the tube body 1, the fins on the tube body 1 are formed in a gradually changing inverted trapezoidal trend, and the height of the fins is continuously increased as the pressure variation becomes larger, so that the through hole forming columns 4 between the fin forming molds 3 on the cutting tool 8 are not required to be arranged between every two adjacent fin forming molds 3, the number of the fin forming molds 3 on each cutting tool 8 is 20-30, and the through hole forming columns 4 are arranged between the fin forming molds 3 at the middle part, and are specifically arranged in the cavities between 8-12 fin forming molds 3.

In order to smoothly separate the formed fin from the fin forming die 3, the through-hole forming post 4 does not hinder the removal of the fin from the die, so that the hardness of the through-hole forming post 4 is lower than that of the pipe body 1 to be processed, and the through-hole forming post 4 may be made of a soft metal. Through-hole profiled pole 4's length is greater than the distance between the adjacent fin moulded die 3, one end is fixed on fin moulded die 3, one end is unset, at the in-process that the metal flows like this, through-hole profiled pole 4 can be by the extrusion bending, but will be formed the through-hole by the metal parcel that flows as long as it exists, at the rotatory in-process of cutter 8, the fin accomplishes the drawing of patterns, because through-hole profiled pole 4 one end is unset, so not deviate from the through-hole by fixed one end, accomplish holistic drawing of patterns, the through-hole of processing is the through-hole of slope.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An integral type spiral finned tube rolling mill is characterized in that: the rolling cutter device comprises a rack, three rolling cutter devices arranged on the rack in a delta shape, a power mechanism and a guide mechanism;

2. The integrated turn-fin tube roll mill of claim 1, wherein: each cutter is provided with 20-30 fin forming dies; the through hole forming column (4) is arranged in a cavity between the 8 th fin forming die and the 12 th fin forming die.

3. The integrated turn-fin tube roll mill of claim 1, wherein: the length of the through hole forming column is larger than the distance between adjacent fin forming dies, one end of the through hole forming column is fixed on the fin forming dies, and the other end of the through hole forming column is not fixed.