CN113305233A

CN113305233A - Pipe winding equipment for winding pipe-wound heat exchanger core

Info

Publication number: CN113305233A
Application number: CN202110691564.4A
Authority: CN
Inventors: 俞晓波; 李凌; 忻红波; 张永辉; 鲍丹阳
Original assignee: ZHENHAI PETROCHEMICAL JIANAN ENGINEERING CO LTD
Current assignee: ZHENHAI PETROCHEMICAL JIANAN ENGINEERING CO LTD
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-08-27

Abstract

A tube winding apparatus for winding a core of a tube wound heat exchanger, comprising: the support ring (1) is sleeved on the periphery of the core body (2) and can axially move relative to the core body (2) under the action of external force; the rotating ring (3) is sleeved on the periphery of the core body (2) and can be rotationally constrained on the support ring (1), and a winding structure for winding the heat exchange tube (21) is arranged on the rotating ring (3); the first driving piece (4) acts on the rotating ring (3) and is used for driving the rotating ring (3) to rotate relative to the supporting ring; and the second driving piece (5) acts on the support ring (1) and provides the external force to drive the support ring (1) to axially move, so that the heat exchange tube (21) is spirally wound on the periphery of the core (2). Compared with the prior art, this application can reduce the core around advancing the risk of around the skew of exit end, heat exchange tube wearing and tearing.

Description

Pipe winding equipment for winding pipe-wound heat exchanger core

Technical Field

The invention belongs to the technical field of heat exchangers, and particularly relates to a pipe winding device for winding a core body of a pipe-wound heat exchanger.

Background

At present, a method for winding a heat exchange tube on a core body by core body rotation is adopted for manufacturing the core body of a tube-wound heat exchanger, for example, a tube-wound machine disclosed in the invention patent of invention patent number CN201410663041.9 (publication number CN104444563A), which comprises a riding wheel for bearing a tube to be wound, a tube feeding device and a tube releasing device, wherein the tube feeding device sequentially comprises a tube feeding base, a lifting mechanism, a fine adjustment mechanism, a supporting seat, a radial adjustment mechanism and the riding wheel from bottom to top; the pipe disassembling device comprises a pipe disassembling base, a chassis is arranged on the pipe disassembling base, a support is arranged on the chassis, and a turntable is arranged on the support and is provided with an axial clamping mechanism, a radial clamping mechanism, a telescopic sleeve, an anti-shrinkage mechanism, sensors and a control system. This patent can trail in real time and advance a tub position, adjusts and send tub height, send tub angle and send tub speed, has guaranteed around tub quality.

For example, a tube winding machine disclosed in the utility model patent No. CN201721747753.4 (publication No. CN207629055U) includes a motor, two central shafts fixed to tube plates at two ends respectively and maintaining coaxial distribution, each central shaft being supported on a base by a self-aligning roller bearing, and one of the central shafts being connected to an output shaft of the motor. This patent supports whole tube bank tube sheet through adopting self-aligning roller bearing, center pin for the tube sheet is unsettled, and the tube sheet excircle no longer receives to roll, can protect tube sheet material not to receive wearing and tearing.

With the large-scale of the pipe-winding type heat exchanger, the existing pipe-winding machine has the following technical problems to be solved: the existing pipe winding machine is provided with a heat exchange pipe wound on the periphery of a core body through the rotation of the core body, the number of rotation turns of the core body is greatly increased along with the large-scale winding of the pipe type heat exchanger, and the problems of the core body, the deviation of the winding in and winding out ends, the abrasion of the heat exchange pipe and the like can be caused by the rotation of a long period.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a tube winding device for winding a core of a tube type heat exchanger so as to reduce the risks of offset of the winding inlet and winding outlet ends of the core and abrasion of a heat exchange tube.

The technical scheme adopted by the invention for solving the technical problems is as follows: a tube winding apparatus for winding a core of a tube wound heat exchanger, comprising:

the support ring is sleeved on the periphery of the core body and can axially move relative to the core body under the action of external force;

the rotating ring is sleeved on the periphery of the core body and can be rotationally constrained on the support ring, and a winding structure for winding the heat exchange tube is arranged on the rotating ring;

the first driving piece is acted on the rotating ring and used for driving the rotating ring to rotate relative to the supporting ring, so that the heat exchange tube on the winding structure is wound on the periphery of the core body;

and the second driving piece acts on the support ring and provides the external force to drive the support ring to axially move, so that the heat exchange tube is spirally wound on the periphery of the core.

Preferably, the second driving member comprises a trolley capable of moving along the axial direction of the core, and the trolley is arranged below the support ring and connected with the bottom of the support ring. Of course, the second driving member may also be a hydraulic cylinder, a pneumatic cylinder, etc., and its output shaft is horizontally disposed and connected to the supporting ring to drive the supporting ring to move.

In order to further limit the moving track of the trolley, the trolley preferably further comprises a rail, the rail extends along the axial direction of the core body, and the trolley is arranged on the rail.

In the above scheme, in order to drive the rotating ring to rotate without affecting the winding of the heat exchange tube, preferably, the first driving member includes a motor and a first gear in transmission connection with an output end of the motor; the outer ring of the rotating ring is provided with a plurality of rotating shafts at equal intervals along the circumferential direction, two ends of each rotating shaft are rotatably connected with the rotating ring, each rotating shaft extends along the axial direction of the rotating ring, and a gap for the tooth part of the first gear to be clamped into is formed between every two adjacent rotating shafts.

Preferably, the first gear has two gears and is arranged at the bottom of the rotating ring at intervals along the circumferential direction of the rotating ring, the first driving member further comprises a second gear connected with the output shaft of the motor and two end-to-end transmission belts engaged with the first and second gears, and each transmission belt is arranged on the outer ring of the second gear and the corresponding first gear.

Preferably, the rotating ring is rotatably constrained on the inner ring of the support ring, an annular groove into which the outer ring of the rotating ring is inserted is formed in the inner ring of the support ring, and the first gear is arranged in the annular groove.

More preferably, at least two bearings for supporting the rotating ring so that the rotating ring can rotate relative to the supporting ring are arranged in the annular groove along the circumferential direction.

In each of the above solutions, a plurality of mounting holes are formed in the axial end face of the rotating ring at intervals along the circumferential direction, the winding structure includes an annular pipe coil, the outer ring of the pipe coil is provided with a first annular groove for the heat exchange pipe to wind, the center of the pipe coil is rotatably connected to the mounting holes through a central shaft, and the pipe coil is located on the periphery of the core body. So, when the core just began the coiling, have great space between core and the rotatory ring, can adopt the tube coils to carry out the coiling this moment.

In order to improve the pipe winding efficiency, preferably, the pipe coils are at least two and are arranged at equal intervals along the circumferential direction of the rotating ring. More preferably, the tube disks are at least three and are arranged at equal intervals along the circumferential direction of the rotating ring.

In each of the above solutions, a plurality of mounting holes are formed in the axial end surface of the rotating ring at intervals along the circumferential direction, the winding structure includes a plurality of winding frames inserted in the mounting holes, the winding frames are arranged along the circumferential direction of the rotating ring, and the plurality of winding frames form an annular surface for the heat exchange tube to wind thereon. After the core body is wound to the position with a larger outer diameter, the space between the core body and the rotating ring is smaller, and at the moment, the heat exchange tube on the winding frame can be adopted for winding. Of course, the heat exchange tube on the winding frame can be always adopted for winding.

Preferably, the winding frames are arranged in a group, and the winding frames are arranged in two groups and are positioned on two sides of the rotating ring in the axial direction.

Compared with the prior art, the invention has the advantages that: through setting up the support ring, rotatory ring, first driving piece and second driving piece, the core periphery is all established with rotatory ring cover to the support ring, and rotatory ring can restrict the inner circle at the support ring with rotating, rotatory ring is first, the axial reciprocating motion of second driving piece down can rotate and along the core, this in-process, can realize the heat exchange tube spiral winding on rotatory winding structure of ring on the core, and the core need not to rotate at the coiling in-process, and then can reduce the fatigue risk of a core center section of thick bamboo. And because the core does not need to rotate, and directly establishes the heat exchange tube around on the core, can reduce the core around advancing around the skew of exit end, the wearing and tearing of heat exchange tube, improve the core quality, prolong the life of whole heat exchanger. And the pipe winding equipment of this application can realize the automation of core coiling process through the slew velocity, the translation rate of control rotatory ring, and then can promote pipe winding efficiency. The pipe winding equipment is simple in structure and convenient to implement, can be used for winding the core of a large-scale pipe winding type heat exchanger, and can also be used for winding the core of a general pipe winding type heat exchanger.

Drawings

FIG. 1 is a front view of a pipe winding apparatus in an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a partial cross-sectional view of a pipe winding apparatus in an embodiment of the present invention;

FIG. 4 is another sectional view showing a partial structure of a pipe winding apparatus according to an embodiment of the present invention;

FIG. 5 is a partial sectional view of the structure of a pipe winding apparatus equipped with a winding frame according to an embodiment of the present invention;

FIG. 6 is a partial sectional view of a pipe winding apparatus equipped with a pipe coil according to an embodiment of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an enlarged view of portion B of FIG. 4;

FIG. 9 is a schematic structural diagram of a tube coil, a heat exchange tube and a tube output mechanism in an embodiment of the invention;

FIG. 10 is an enlarged view of portion C of FIG. 9;

fig. 11 is an enlarged view of a portion D in fig. 9.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Referring to fig. 1 to 11, a preferred embodiment of a tube winding apparatus for winding a core of a tube heat exchanger according to the present invention includes a support ring 1, a rotary ring 3, a first driving member 4, a second driving member 5, a tube output mechanism 8, and a bracket 9.

Of these, two brackets 9 are provided for supporting both ends of the core 2. The support ring 1 is a circular ring and is used for being sleeved on the periphery of the core body 2 and being capable of moving axially relative to the core body 2 under the action of external force. The rotating ring 3 is a circular ring and is used for being sleeved on the periphery of the core body 2 and being rotationally constrained on the inner ring of the supporting ring 1. The first drive 4 acts on the rotary ring 3 for driving the rotary ring 3 in rotation. The second drive 5 acts on the support ring 1 and provides the above-mentioned external force to drive the support ring 1 to move. In this embodiment, the inner ring of the support ring 1 is provided with an annular groove 10 into which the outer ring of the rotating ring 3 is inserted. A plurality of rotating shafts 31 are provided on the outer ring of the rotating ring 3 at equal intervals in the circumferential direction, both ends of each rotating shaft 31 are rotatably connected to the rotating ring 3, each rotating shaft 31 extends in the axial direction of the rotating ring 3, and a gap 310 is formed between two adjacent rotating shafts 31. The first driving member 4 includes a motor 41, a first gear 42, a second gear 43, and a transmission belt 44, wherein the motor 41 is fixed relative to the support ring 1, the second gear 43 is connected to an output shaft of the motor 41, two first gears 42 are disposed below the bottom of the rotating ring 3 at intervals along the circumferential direction of the rotating ring 3 and are located in the annular groove 10 of the support ring 1, and the teeth of each first gear 42 can be engaged into the gaps 310 of two adjacent rotating shafts 31, so that the rotation of the first gear 42 can drive the rotating ring 3 to rotate; the two belts 44 are closed rings connected end to end, and each belt 44 is disposed on the outer ring of the second gear 43 and the corresponding first gear 42, and is engaged with the first and second gears. In this way, the rotation of the output shaft of the motor 41 can drive the first gear 42 to rotate through the transmission of the second gear 43 and the transmission belt 44, and further drive the rotating ring 3 to rotate. Meanwhile, a plurality of bearings 100 for supporting the rotating ring 3 such that the rotating ring 3 can rotate relative to the support ring 1 are installed between the support ring 1 and the rotating ring 3 of the present embodiment, and the bearings 100 are provided in the annular groove 10 and arranged at intervals in the circumferential direction of the annular groove 10. The bearings of this embodiment are four and are located in the lower part of the annular groove 10.

The pipe winding device of the embodiment comprises a trolley 51 capable of moving along the axial direction of the core body 2, the trolley 51 is arranged below the support ring 1 and is connected with the bottom of the support ring 1, and the second driving piece 5 acts on the trolley 51 to drive the trolley 51 to move. The second driving member can be a hydraulic cylinder, a pneumatic cylinder or a driving assembly with a motor and a driving member. In order to realize that the trolley 51 can only move along the axial direction of the core body 2, the trolley 51 further comprises a rail 52, the rail 52 extends along the axial direction of the core body 2, and the trolley 51 is arranged on the rail 52.

To realize the supply of the heat exchange tube 21, the rotary ring 3 is provided with a winding structure on which the heat exchange tube 21 is wound. In this embodiment, a plurality of mounting holes 30 for connecting a winding structure including a pipe reel 6 and a winding frame 7 are provided at an axial end face of the rotating ring 3 at intervals in the circumferential direction, and the winding structure is alternatively mounted at the mounting holes 30 when winding the pipe.

When the selected tube disks 6 are installed, as shown in fig. 6, there are at least two (4 in the present embodiment) of the tube disks 6 and arranged at equal intervals along the circumferential direction of the rotating ring 3, the outer ring of each tube disk 6 has a first annular groove 60 around which the heat exchange tube 21 is wound, the center of the tube disk 6 is rotatably connected at the installation hole 30 by the center shaft, and the tube disks 6 are located on the periphery of the core 2. In this embodiment, the center of the tube plate 6 is offset from the mounting hole 30 and is located close to the core 2, the central axis is Z-shaped, and a first end of the central axis is mounted in the mounting hole 30, and a second end of the central axis is rotatably connected to the center of the tube plate 6 to prevent the tube plate 6 from contacting the trolley 51 below during rotation.

When the winding frame 7 is selected for installation, as shown in fig. 2, 3 and 5, the winding frame 7 is provided in plural and arranged along the circumferential direction of the rotating ring 3, and the plural winding frames 7 form an annular surface around which the heat exchange pipe 21 is wound. And a plurality of winding frames 7 are arranged as a group, and two groups of winding frames 7 are arranged at two sides of the rotating ring 3 in the axial direction. In the present embodiment, each winding frame 7 is inserted into the mounting hole 30.

When the tube winding is started, a plurality of tube coils 6 can be selected, namely a plurality of heat exchange tubes 21 are wound synchronously; after the core 2 is wound to a certain volume, at the moment, the space between the outer side wall of the core 2 and the inner ring of the rotating ring 3 is small, the pipe coil 6 is limited, the pipe coil 6 can be detached, the winding frame 7 is arranged on one side or two sides of the rotating ring 3 in the axial direction, the heat exchange pipe 21 to be wound is wound on the winding frame 7, and then the pipe winding operation is continued until the required core is wound.

Of course, the whole process can be wound by only using the heat exchange tube on the tube winding frame 7. The pipe output mechanism 8 acts on the heat exchange pipe 21 output from the winding structure, and comprises a pipe leveling structure 81, a pipe damping structure 82 and a pipe output structure 83, wherein the pipe leveling structure 81, the pipe damping structure 82 and the pipe output structure 83 adopt the prior art, and the structure is shown in fig. 8-10, so as to pull the heat exchange pipe 21 to move and correct the straightness of the heat exchange pipe 21, and further improve the quality of the wound pipe.

The steps of winding the pipe by adopting the pipe winding equipment of the embodiment are as follows:

firstly, placing the pipe winding device between two brackets 9, penetrating a central cylinder 2 through a rotating ring 3 of the pipe winding device, and supporting two ends of the central cylinder 2 on the two brackets 9;

secondly, the pipe discs 6 are arranged on the same side of the mounting hole 30 of the rotating ring 3, the winding ends of the heat exchange pipes 21 on the pipe discs 6 are fixed on the central cylinder of the core body 2, and then the first driving piece and the second driving piece are driven, so that the rotating ring 3 can rotate and can also reciprocate along the axial direction of the core body 2, and the heat exchange pipes on the pipe discs 6 are spirally wound on the periphery of the core body 2;

thirdly, after the core body 2 is wound to a certain volume, the outer diameter of the core body is large, the space between the core body 2 and the rotating ring 3 is small, at the moment, the first driving part and the second driving part are controlled to stop working, then the pipe coil 6 is taken down, each winding frame 7 is installed on the installation hole 30 of the rotating ring 3, the heat exchange pipe to be wound is wound on the winding frame 7, the winding end of the heat exchange pipe on the winding frame 7 is fixed on the core body 2, and finally the first driving part and the second driving part are driven to work, so that the heat exchange pipe on the winding frame is spirally wound on the periphery of the core body 2 until the required core body 2 is wound.

Claims

1. A tube winding apparatus for winding a core of a tube wound heat exchanger, comprising:

the support ring (1) is sleeved on the periphery of the core body (2) and can axially move relative to the core body (2) under the action of external force;

the rotating ring (3) is sleeved on the periphery of the core body (2) and can be rotationally constrained on the support ring (1), and a winding structure for winding the heat exchange tube (21) is arranged on the rotating ring (3);

the first driving piece (4) acts on the rotating ring (3) and is used for driving the rotating ring (3) to rotate relative to the support ring (1), so that the heat exchange tube (21) on the winding structure is wound on the periphery of the core body (2);

and the second driving piece (5) acts on the support ring (1) and provides the external force to drive the support ring (1) to axially move, so that the heat exchange tube (21) is spirally wound on the periphery of the core (2).

2. The pipe spooling apparatus of claim 1 wherein: the second driving piece (5) comprises a trolley (51) capable of moving along the axial direction of the core body (2), and the trolley (51) is arranged below the support ring (1) and connected with the bottom of the support ring (1).

3. The pipe spooling apparatus of claim 2 wherein: the core body is characterized by further comprising a rail (52), the rail (52) extends along the axial direction of the core body (2), and the trolley (51) is arranged on the rail (52).

4. The pipe spooling apparatus of claim 1 wherein: the first driving piece (4) comprises a motor (41) and a first gear (42) in transmission connection with the output end of the motor (41); the outer ring of the rotating ring (3) is provided with a plurality of rotating shafts (31) at equal intervals along the circumferential direction, two ends of each rotating shaft (31) are rotatably connected with the rotating ring (3), each rotating shaft (31) extends along the axial direction of the rotating ring (3), and a gap (310) for the tooth part of the first gear (42) to be clamped into is formed between every two adjacent rotating shafts (31).

5. The pipe spooling apparatus of claim 4 wherein: the first gears (42) are arranged at the bottom of the rotating ring (3) at intervals along the circumferential direction of the rotating ring (3), the first driving piece (4) further comprises a second gear (43) connected with an output shaft of the motor (41) and two driving belts (44) which are meshed with the first gear and the second gear and are connected end to end, the driving belts (44) are two, and each driving belt (44) is arranged on the outer rings of the second gear (43) and the corresponding first gear (42).

6. The pipe spooling apparatus of claim 4 wherein: the rotating ring (3) can be rotationally constrained on the inner ring of the support ring (1), an annular groove (10) for inserting the outer ring of the rotating ring (3) is formed in the inner ring of the support ring (1), and the first gear (42) is arranged in the annular groove (10).

7. The pipe spooling apparatus of claim 6 wherein: at least two bearings (100) for supporting the rotating ring (3) so that the rotating ring (3) can rotate relative to the support ring (1) are arranged in the annular groove (10) along the circumferential direction.

8. A pipe winding apparatus according to any one of claims 1 to 7, wherein: a plurality of mounting holes (30) are formed in the axial end face of the rotating ring (3) at intervals along the circumferential direction, the winding structure comprises an annular pipe disc (6), the outer ring of the pipe disc (6) is provided with a first annular groove (60) for the heat exchange pipe (21) to wind on the pipe disc, the center of the pipe disc (6) is rotatably connected to the mounting holes (30) through a center shaft, and the pipe disc (6) is located on the periphery of the core body (2).

9. The pipe spooling apparatus of claim 8 wherein: the number of the pipe discs (6) is at least two, and the pipe discs are arranged at equal intervals along the circumferential direction of the rotating ring (3).

10. A pipe winding apparatus according to any one of claims 1 to 7, wherein: the axial end face of the rotating ring (3) is provided with a plurality of mounting holes (30) at intervals along the circumferential direction, the winding structure comprises winding frames (7) inserted in the mounting holes (30), the winding frames (7) are provided with a plurality of winding frames and are arranged along the circumferential direction of the rotating ring (3), and the plurality of winding frames (7) form annular surfaces for the heat exchange tubes (21) to wind on.

11. The spooling apparatus of claim 10 wherein: a plurality of winding frames (7) are taken as one group, and two groups of winding frames (7) are arranged at two sides of the rotating ring (3) in the axial direction.