CN113714796A

CN113714796A - Preparation process of multistage cylinder of heat exchanger

Info

Publication number: CN113714796A
Application number: CN202110982069.9A
Authority: CN
Inventors: 孙东德; 舒军勇; 王义葳; 谢能刚; 周开创; 李振东
Original assignee: Anhui Dongneng Heat Exchange Equipment Co ltd
Current assignee: Anhui Dongneng Heat Exchange Equipment Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-11-30
Anticipated expiration: 2041-08-25
Also published as: CN113714796B

Abstract

The invention relates to the technical field of heat exchangers, in particular to a preparation process of a multistage barrel of a heat exchanger, which comprises an outer barrel, a cover plate, an underframe, a first inner connecting pipe and a heat conducting pipe, wherein the cover plate is mounted at the front end of the outer barrel through bolts, first through holes are uniformly formed in the surface of the cover plate, second through holes are formed in the periphery of the cover plate, a water inlet pipe is fixed at the tail end of the outer barrel through bolts, the underframe is mounted on the outer side of the outer barrel, a middle frame is movably mounted above the underframe, an upper frame is arranged above the middle frame, the first inner connecting pipe is mounted inside the outer barrel, and a sliding groove is formed in the surface of the cover plate. The invention has the beneficial effects that: the preparation process of the multistage cylinder of the heat exchanger is improved on the basis of the prior art, and the function of simultaneously discharging four fluids with heat exchange effects is realized by using the water outlet pipes with the lengths decreasing from inside to outside, so that the functionality of the device is improved, and the defect of single function of the prior heat exchanger is overcome.

Description

Preparation process of multistage cylinder of heat exchanger

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a preparation process of a multi-stage cylinder of a heat exchanger.

Background

The heat exchanger is the equipment that carries out the conversion to fluid heat, and the inside of heat exchanger is made by multistage pipeline and barrel usually, utilizes the liquid of different body injection different temperatures, through metal pipeline transfer heat to realize the exchange of temperature, the heat exchanger is often used for chemical industry and sewage treatment etc. and some problems still exist when using in some current heat exchangers.

When the existing heat exchanger is used, the heat exchanger cannot adapt to liquid with different quantities to perform heat exchange work, when the quantity to be processed is more, the heat exchanger is not convenient to expand the whole device, the working efficiency is lower, in addition, in the using process, the treatment effect can be adjusted, but the liquid with multiple treatment strengths cannot be reserved simultaneously, the practicability is poor, the assembly inside the device is difficult to disassemble, the adjustable degree is low, the simultaneous water outlet work cannot be performed on the liquid with different heat exchange effects, and the function is single.

Disclosure of Invention

The invention provides a preparation process of a multi-stage cylinder of a heat exchanger aiming at the technical problems in the prior art, and aims to solve the problems that some heat exchangers in the prior art cannot simultaneously discharge water for liquids with different heat exchange effects, are low in working efficiency and inconvenient to disassemble and assemble internal components.

The technical scheme for solving the technical problems is as follows: a preparation process of a multi-stage cylinder of a heat exchanger comprises the following steps:

A. adjusting the installation size: the integral treatment capacity of the device is adjusted according to the treatment capacity, when the treatment capacity is large, the integral installation number of the heat exchanger cylinders is increased to improve the working efficiency, and when the treatment capacity is small, the installation number of the heat exchanger cylinders is reduced;

B. installing a grading cylinder body: mounting and butting the grading cylinders in the device, and mounting corresponding grading cylinders in the outer cylinders;

C. butt joint: mounting the front cover, and fixing the grading cylinder at each position through fixing equipment;

D. installing a water outlet pipe: installing a corresponding water outlet pipe body at the front end of the grading cylinder body, so that the fluid after heat exchange can flow out;

E. heat exchange: fluid with different temperatures is injected into different pipelines in the device to realize heat exchange of the fluid, and the fluid with different heat exchange degrees is classified and discharged through different water outlet pipes;

the heat exchanger cylinder in step a in the multistage cylinder preparation process of the heat exchanger comprises:

the heat exchanger comprises an outer barrel, a cover plate, a bottom frame, a first inner connecting pipe and a heat conducting pipe, wherein the cover plate is installed on a front end bolt of the outer barrel, first through holes are evenly formed in the surface of the cover plate, second through holes are formed in the periphery of the cover plate, a water inlet pipe is fixed to a tail end bolt of the outer barrel, the bottom frame is installed on the outer side of the outer barrel, a middle frame is movably installed above the bottom frame, an upper frame is arranged above the middle frame, the first inner connecting pipe is installed inside the outer barrel, and a sliding groove is formed in the surface of the cover plate.

The invention has the beneficial effects that:

1) the heat exchanger has better multi-stage cylinder preparation process effect, the invention is improved on the basis of the prior art, the four inner connecting pipes are utilized to ensure that the heat conduction pipes with different numbers are arranged in the inner connecting pipes, the heat transfer is carried out on the fluid through the heat conduction pipes, and the heat exchange function is realized;

2) the multistage barrel of this heat exchanger preparation technology effect is better, the device can utilize drive mechanism to install fast and dismantle the inside subassembly of device at the in-process that uses, convenience when having promoted the dismouting of device, the convenience is fully cleared up inside, and can also be according to the size of discharge and wholly extend the device, make the device can adapt to different treatment capacities and carry out the adaptability and adjust, not only hoisting device's work efficiency, the application scope of device has also been promoted, the relatively poor defect of current heat exchanger suitability when using has been solved, it is better to have a result of use, the stronger advantage of suitability.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, mounting grooves are formed in the bottom frame, the middle frame and the top frame, a first overlapping block is movably mounted in the mounting grooves, a connecting plate is fixedly mounted above the first overlapping block, a second overlapping block is fixedly arranged above the connecting plate, a butt joint groove is formed in the surface of the second overlapping block, an opening is formed in the middle of the connecting plate, the first overlapping block and the second overlapping block are symmetrically distributed on the upper side and the lower side of the connecting plate, the first overlapping block, the connecting plate and the second overlapping block are of an integrated structure, and the diameters of the first overlapping block and the second overlapping block are larger than the thickness of the connecting plate; the surface sliding of well frame and roof-rack installs the briquetting, the top fixedly connected with spring of briquetting, the front end fixed mounting of briquetting has the connection handle, the front end surface of briquetting and the side parallel and level of well frame and roof-rack.

Adopt above-mentioned further scheme's beneficial effect is, overlap joint is carried out first overlap joint piece and second overlap joint piece through the connecting plate on the device, docks two adjacent urceoluses through second overlap joint piece, connecting plate and first overlap joint piece, compresses tightly second overlap joint piece through the briquetting to stabilize fixedly to two adjacent urceoluses, make the device can adapt to different needs and adjust the heat exchange treatment volume of device, promoted the work efficiency of device.

Further, the briquetting passes through to constitute elastic construction between spring and the roof-rack, and the width of briquetting bottom is less than the length of butt joint groove, laminates mutually between the inner wall in butt joint groove and the outer wall of briquetting, second overlap joint piece is through constituting the block structure between butt joint groove and briquetting and the roof-rack, the roof-rack is through constituting the block structure between first overlap joint piece, connecting plate and second overlap joint piece and the well frame.

The number of the outer cylinders installed is adjusted by the aid of the clamping structures on the device, so that the device can adapt to different processing amounts, the practicability of the device is improved, and the number of the outer cylinders installed between the bottom frame and the top frame can be adjusted according to the number of the installed middle frames.

Furthermore, the sliding grooves are distributed on the surface of the cover plate at equal angles, sliding blocks are slidably mounted inside the sliding grooves, fixed blocks are fixedly mounted on the surfaces of the sliding blocks, and the front ends of the fixed blocks are fixedly connected with circular rings; the improved rotary ring is characterized in that a rotary groove for rotating the circular ring is formed in the cover plate, an elastic band is fixedly arranged on the surface of the sliding block, the front end of the elastic band is fixedly installed on the cover plate, and the sliding block is of an elastic structure through the elastic band and the cover plate.

Adopt above-mentioned further scheme's beneficial effect to be, drive slider rotate simultaneously everywhere through the ring on the device, convenient follow-up stable installation and dismantlement to the outlet pipe have promoted the convenience that the device used.

Further, a second inner pipe is arranged inside the first inner pipe, a third inner pipe is arranged inside the second inner pipe, a fourth inner pipe is arranged inside the third inner pipe, heat transfer pipes are mounted in the first inner pipe, the second inner pipe, the third inner pipe and the fourth inner pipe at equal angles, and the number of the heat transfer pipes in the first inner pipe, the second inner pipe, the third inner pipe and the fourth inner pipe is different; the front ends of the first inner connecting pipe, the second inner connecting pipe, the third inner connecting pipe and the fourth inner connecting pipe are fixedly provided with connecting blocks, the connecting blocks correspond to the second through holes, clamping rods penetrate through the connecting blocks on the outermost circle, the left side and the right side of the top end of each clamping rod are fixedly connected with traction steel ropes, the front ends of the connecting blocks are provided with water outlet pipes, the water outlet pipes are connected with adjacent water outlet pipes through welding plates, and the length of the water outlet pipes is gradually reduced from inside to outside.

The beneficial effect who adopts above-mentioned further scheme is that, go out water simultaneously to the liquid of different heat transfer effects through the inside not unidimensional internal union coupling outlet pipe of device, has promoted the controllability of device, adjusts simultaneously through the position of drawing the steel cable to the slider everywhere on the device.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the connection structure of the outer cylinder and the water inlet pipe of the present invention;

FIG. 4 is a schematic view of the docking station and ring connection structure of the present invention;

FIG. 5 is a schematic diagram of the structure of FIG. 4 at B in accordance with the present invention;

FIG. 6 is a schematic view showing a coupling structure of an outer cylinder and a first inner joint pipe according to the present invention;

FIG. 7 is a schematic side view of the cover plate according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the outer cylinder, 2, a cover plate, 3, a first through hole, 4, a second through hole, 5, a water inlet pipe, 6, a bottom frame, 7, a middle frame, 8, a top frame, 9, a mounting groove, 10, a first overlapping block, 11, a connecting plate, 12, a second overlapping block, 13, a butt groove, 14, an opening, 15, a pressing block, 16, a spring, 17, a connecting handle, 18, a sliding groove, 19, a sliding block, 20, a fixing block, 21, a circular ring, 22, a rotating groove, 23, an elastic band, 24, an engaging block, 25, a clamping rod, 26, a first inner connecting pipe, 27, a second inner connecting pipe, 28, a third inner connecting pipe, 29, a fourth inner connecting pipe, 30, a heat conducting pipe, 31, a traction steel rope, 32, a water outlet pipe, 33 and a welding plate.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

The heat exchanger is heat exchange equipment commonly used in the chemical field, the existing heat exchanger cannot overlap a plurality of heat exchanger cylinders when in use, cannot adapt to different heat exchange requirements to separate water outlets with different temperatures in the use process, has single function, cannot adapt to different water inlet and outlet amounts to adjust the whole heat exchange space, has lower adjustable degree, and provides a multistage cylinder preparation process of the heat exchanger to solve the problems.

The present invention provides the following preferred embodiments

As shown in fig. 1 to 4 and fig. 7, a process for preparing a multi-stage cylinder of a heat exchanger comprises the following steps:

urceolus 1, apron 2, chassis 6, first inner union coupling 26 and heat pipe 30, apron 2 is installed to the front end bolt of urceolus 1, first through-hole 3 has evenly been seted up on the surface of apron 2, second through-hole 4 has been seted up all around to apron 2, the terminal bolted fixation of urceolus 1 has inlet tube 5, chassis 6 is installed in the outside of urceolus 1, the top movable mounting of chassis 6 has well frame 7, the top of well frame 7 is provided with roof-rack 8, the internally mounted of urceolus 1 has first inner union coupling 26, spout 18 has been seted up on the surface of apron 2.

In this embodiment, as shown in fig. 1 to 5, in order to further improve the adjustability of the device, mounting grooves 9 are formed in the bottom frame 6, the middle frame 7 and the top frame 8, first overlapping blocks 10 are movably mounted in the mounting grooves 9, a connecting plate 11 is fixedly mounted above the first overlapping blocks 10, second overlapping blocks 12 are fixedly arranged above the connecting plate 11, butt-joint grooves 13 are formed in the surfaces of the second overlapping blocks 12, an opening 14 is formed in the middle of the connecting plate 11, the first overlapping blocks 10 and the second overlapping blocks 12 are symmetrically distributed on the upper side and the lower side of the connecting plate 11, the first overlapping blocks 10, the connecting plate 11 and the second overlapping blocks 12 are of an integrated structure, and the diameters of the first overlapping blocks 10 and the second overlapping blocks 12 are larger than the thickness of the connecting plate 11; the surperficial slidable mounting of midframe 7 and roof-rack 8 has briquetting 15, the top fixedly connected with spring 16 of briquetting 15, the front end fixed mounting of briquetting 15 has connecting handle 17, the front end surface of briquetting 15 and the side parallel and level of midframe 7 and roof-rack 8, connecting plate 11 through on the device carries out the overlap joint to first overlap joint piece 10 and second overlap joint piece 12, through second overlap joint piece 12, connecting plate 11 and first overlap joint piece 10 dock adjacent two urceolus 1, compress tightly second overlap joint piece 12 through briquetting 15, thereby stabilize fixedly to adjacent two urceolus 1, make the device can adapt to different needs and adjust the heat exchange treatment volume of device, the work efficiency of device has been promoted.

In this embodiment, as shown in fig. 1 to 4, in order to further improve the applicability of the device, the pressing block 15 forms an elastic structure with the top frame 8 through the spring 16, the width of the bottom end of the pressing block 15 is smaller than the length of the butt-joint groove 13, the inner wall of the butt-joint groove 13 and the outer wall of the pressing block 15 are mutually attached, the second butt-joint block 12 forms a clamping structure with the top frame 8 through the butt-joint groove 13 and the pressing block 15, the top frame 8 forms a clamping structure with the middle frame 7 through the first butt-joint block 10, the connecting plate 11 and the second butt-joint block 12, and the number of the outer cylinders 1 mounted is adjusted by using the clamping structure on the device, so that the device can adapt to different processing amounts, the practicability of the device is improved, and the device can adjust the number of the outer cylinders 1 mounted between the bottom frame 6 and the top frame 8 according to the number of the mounted middle frames 7.

In this embodiment, as shown in fig. 3 to 6, in order to further improve the convenience of assembling and disassembling the device, the sliding grooves 18 are distributed on the surface of the cover plate 2 at equal angles, the sliding blocks 19 are slidably mounted inside the sliding grooves 18, the fixed blocks 20 are fixedly mounted on the surfaces of the sliding blocks 19, and the front ends of the fixed blocks 20 are fixedly connected with the circular rings 21; the rotating groove 22 for rotating the ring 21 is formed in the cover plate 2, the elastic band 23 is fixedly arranged on the surface of the sliding block 19, the front end of the elastic band 23 is fixedly installed on the cover plate 2, the sliding block 19 forms an elastic structure with the cover plate 2 through the elastic band 23, the sliding block 19 is driven to rotate simultaneously through the ring 21 on the device, and stable installation and disassembly of the water outlet pipe 32 are facilitated subsequently.

In the present embodiment, as shown in fig. 1 to 6, in order to further improve the functionality of the apparatus, a second inner pipe 27 is provided inside the first inner pipe 26, a third inner pipe 28 is provided inside the second inner pipe 27, a fourth inner pipe 29 is provided inside the third inner pipe 28, heat transfer pipes 30 are attached to the inside of the first inner pipe 26, the second inner pipe 27, the third inner pipe 28, and the fourth inner pipe 29 at equal angles, and the number of the heat transfer pipes 30 is different in each of the inside of the first inner pipe 26, the second inner pipe 27, the third inner pipe 28, and the fourth inner pipe 29; the front ends of the first inner connecting pipe 26, the second inner connecting pipe 27, the third inner connecting pipe 28 and the fourth inner connecting pipe 29 are all fixedly provided with a connecting block 24, the connecting block 24 corresponds to the second through hole 4, a clamping rod 25 penetrates through the connecting block 24 on the outermost ring, the left side and the right side of the top end of the clamping rod 25 are all fixedly connected with traction steel ropes 31, the front end of the connecting block 24 is provided with a water outlet pipe 32, the water outlet pipe 32 is connected with the adjacent water outlet pipe 32 through a welding plate 33, the length of the water outlet pipe 32 is gradually reduced from inside to outside, the inner connecting pipes with different sizes in the device are matched with the water outlet pipe 32 to simultaneously discharge water with different heat exchange effects, and the positions of the sliding blocks 19 on the device are simultaneously adjusted through the traction steel ropes 31.

The specific working process of the invention is as follows:

(1) adjusting installation size

Firstly, a plurality of outer cylinders 1 are spliced, the outer cylinders 1 are respectively installed in the underframe 6, the middle frame 7 and the top frame 8, the number of the installed middle frames 7 is adjusted according to the amount of fluid to be processed, so that the number of the installed outer cylinders 1 is increased, the working efficiency is ensured, when the outer cylinders 1 are added, the middle frames 7 are installed on the adjacent middle frames 7, then the middle frames 7 and the underframe 6 are fixed through the top frame 8, firstly, the first overlapping blocks 10, the connecting plates 11 and the second overlapping blocks 12 are installed in the installation grooves 9, the pressing blocks 15 are pressed through the springs 16, the pressing blocks 15 are pressed in the butt joint grooves 13, and the whole clamping work of the device is completed.

(2) Install hierarchical barrel

The first, second, third and fourth

inner pipes

26, 27, 28 and 29 are fitted into the outer tube 1, the heat transfer pipe 30 is fitted between the adjacent two inner pipes, and then the joint block 24 is fitted to the second through hole 4 of the cover plate 2, and the cover plate 2 is fitted so that the first, second, third and fourth

inner pipes

26, 27, 28 and 29 are fixed inside the outer tube 1.

(3) Mounting outlet pipe 32

Install outlet pipe 32 in the inside of linking piece 24, through in inserting linking piece 24 of outside each card pole 25, make outlet pipe 32 stably fix the front end at each inside union coupling, then through elastic cord 23 pulling slide block 19 in spout 18, because opening 14 all around of device links to each other with ring 21 through fixed block 20, when ring 21 rotates in the inside of revolving chute 22, can drive each slide block 19 synchronous rotation, thereby support the front end of card pole 25, guarantee outlet pipe 32's stable installation work

(4) Heat exchange

Let in liquid to the inside of heat conduction pipe 30, to letting in liquid between the continuous two inscribe pipes, make and to carry out heat exchange work between the two liquid, because the installation quantity of the heat conduction pipe 30 in the inscribe pipe of difference is different, consequently the device can adapt to different heat transfer demands and carry out hierarchical heat transfer, and the liquid of different heat transfer degrees can go out water through first through-hole 3, and flow out through the opening of outlet pipe 32 front end the latter half, accomplish holistic heat transfer work, the realization is discharged simultaneously to the liquid of multiple different heat transfer degrees.

In summary, the following steps: the heat exchanger has the beneficial effects that the device is improved on the basis of the prior art, the multi-stage cylinder body preparation process effect of the heat exchanger is better, the heat exchanger is improved on the basis of the prior art, the four inner connecting pipes are utilized to enable the heat conduction pipes 30 with different numbers to be arranged inside the inner connecting pipes, the heat conduction pipes 30 are utilized to conduct heat transfer on fluid, and the heat exchange function is realized;

this heat exchanger's multistage barrel preparation technology effect is better, the device can utilize drive mechanism to install fast and dismantle the inside subassembly of device at the in-process that uses, convenience when having promoted the dismouting of device, the convenience is fully cleared up inside, and can also be according to the size of discharge to the whole extension of device, make the device can adapt to different treatment capacities and carry out adaptability and adjust, not only hoisting device's work efficiency, the application scope of device has also been promoted, the relatively poor defect of current heat exchanger suitability when using has been solved, it is better to have a result of use, the stronger advantage of suitability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A preparation process of a multi-stage cylinder of a heat exchanger is characterized by comprising the following steps:

the heat pipe comprises an outer barrel (1), a cover plate (2), a bottom frame (6), a first inner connecting pipe (26) and a heat conducting pipe (30), wherein the cover plate (2) is installed on a front end bolt of the outer barrel (1), first through holes (3) are evenly formed in the surface of the cover plate (2), second through holes (4) are formed in the periphery of the cover plate (2), a water inlet pipe (5) is fixed to a tail end bolt of the outer barrel (1), the bottom frame (6) is installed on the outer side of the outer barrel (1), a middle frame (7) is movably installed above the bottom frame (6), a top frame (8) is arranged above the middle frame (7), the first inner connecting pipe (26) is installed inside the outer barrel (1), and a sliding groove (18) is formed in the surface of the cover plate (2).

2. The process for preparing a multi-stage cartridge for a heat exchanger according to claim 1, mounting groove (9) have all been seted up to the inside of chassis (6), well frame (7) and roof-rack (8), the inside movable mounting of mounting groove (9) has first overlap joint piece (10), the top fixed mounting of first overlap joint piece (10) has connecting plate (11), the fixed second overlap joint piece (12) that is provided with in top of connecting plate (11), butt joint groove (13) have been seted up on the surface of second overlap joint piece (12), opening (14) have been seted up to the centre of connecting plate (11), first overlap joint piece (10) and second overlap joint piece (12) symmetric distribution are in the upper and lower both sides of connecting plate (11), first overlap joint piece (10), connecting plate (11) and second overlap joint piece (12) formula structure as an organic whole, the diameter of first overlap joint piece (10) and second overlap joint piece (12) is greater than the thickness of connecting plate (11).

3. The preparation process of the multistage cylinder of the heat exchanger according to claim 2, wherein the surfaces of the middle frame (7) and the top frame (8) are provided with a pressing block (15) in a sliding manner, a spring (16) is fixedly connected above the pressing block (15), the front end of the pressing block (15) is fixedly provided with a connecting handle (17), and the front end surface of the pressing block (15) is flush with the side surfaces of the middle frame (7) and the top frame (8).

4. The process for preparing the multistage cylinder of the heat exchanger according to claim 3, wherein the pressing block (15) forms an elastic structure with the top frame (8) through the spring (16), the width of the bottom end of the pressing block (15) is smaller than the length of the butt joint groove (13), the inner wall of the butt joint groove (13) is attached to the outer wall of the pressing block (15), the second overlapping block (12) forms a clamping structure with the top frame (8) through the butt joint groove (13) and the pressing block (15), and the top frame (8) forms a clamping structure with the middle frame (7) through the first overlapping block (10), the connecting plate (11) and the second overlapping block (12).

5. The preparation process of the multistage cylinder of the heat exchanger according to claim 1, wherein the sliding grooves (18) are distributed on the surface of the cover plate (2) at equal angles, sliding blocks (19) are slidably mounted inside the sliding grooves (18), fixed blocks (20) are fixedly mounted on the surfaces of the sliding blocks (19), and circular rings (21) are fixedly connected to the front ends of the fixed blocks (20); the improved structure of the automobile seat cover is characterized in that a rotary groove (22) for the rotation of the circular ring (21) is formed in the cover plate (2), an elastic band (23) is fixedly arranged on the surface of the sliding block (19), the front end of the elastic band (23) is fixedly arranged on the cover plate (2), and the sliding block (19) is of an elastic structure through the elastic band (23) and the cover plate (2).

6. The multistage tube manufacturing process of the heat exchanger according to claim 1, wherein a second inner tube (27) is provided inside the first inner tube (26), a third inner tube (28) is provided inside the second inner tube (27), a fourth inner tube (29) is provided inside the third inner tube (28), heat transfer pipes (30) are installed at equal angles inside the first inner tube (26), the second inner tube (27), the third inner tube (28) and the fourth inner tube (29), and the number of the heat transfer pipes (30) inside the first inner tube (26), the second inner tube (27), the third inner tube (28) and the fourth inner tube (29) is different.

7. The preparation process of the multistage cylinder of the heat exchanger according to claim 6, wherein the front ends of the first inner pipe (26), the second inner pipe (27), the third inner pipe (28) and the fourth inner pipe (29) are all fixedly provided with a connecting block (24), the connecting block (24) and the second through hole (4) correspond to each other, a clamping rod (25) penetrates through the connecting block (24) at the outermost ring, the left side and the right side of the top end of the clamping rod (25) are both fixedly connected with traction steel cables (31), and the front end of the connecting block (24) is provided with a water outlet pipe (32).

8. The process for preparing the multistage cylinder of the heat exchanger according to claim 7, wherein the water outlet pipe (32) is connected with the adjacent water outlet pipe (32) through a welding plate (33), and the length of the water outlet pipe (32) is gradually reduced from inside to outside.