Outer longitudinal groove pipe machining device for efficient heat exchanger

Abstract

The utility model discloses an efficient heat exchanger outer longitudinal groove pipe machining device which comprises a machine tool support, a groove broaching assembly, an indexing assembly and a drawing assembly, the groove broaching assembly comprises a first supporting plate, a first hollow hydraulic chuck and a groove broaching die, and the first supporting plate is vertically arranged and fixed to the machine tool support; the first hollow hydraulic chuck comprises a chuck base fixedly connected with the first supporting plate and a clamping jaw installed on the chuck base, and a center hole horizontally formed in the axial direction is formed in the center of the chuck base. The groove broaching die comprises bases fixed to the clamping jaws respectively, cutting dies are installed at the positions, close to the center hole, of the bases respectively, the cutting dies are annularly distributed on the outer side of the center hole, and cutting heads of the cutting dies face the center hole. According to the utility model, a plurality of uniformly distributed longitudinal grooves can be quickly drawn on the outer surface of the pipe fitting to be processed at one time, the final outer longitudinal groove pipe can be obtained by drawing for several times under the matching of the indexing tool, the processing efficiency is high, the drawing speed is high, and the material work hardening rate is low.

Description

Technical Field

[0001] The utility model relates to a processing device for an external longitudinal groove tube used in an efficient heat exchanger, in particular to a special-shaped tube for an efficient heat exchanger, belonging to the technical field of heat exchange tube processing. Background Technique

[0002] An external longitudinal groove tube is a round tube with longitudinal grooves on the outer surface of the round tube, mainly used for the external condensation working condition in the petrochemical industry. Compared with an ordinary round tube, the external longitudinal groove tube has better heat exchange performance.

[0003] At present, the commonly used external longitudinal groove processing technology is rolling and rolling. The Chinese patent with the publication number CN 203955815U and the name of "Longitudinal Groove Tube Rolling Die and Longitudinal Groove Tube Rolling Device" discloses a longitudinal groove tube rolling device, which adopts a device similar to a three-axis thread rolling machine, replaces the thread rolling die with a longitudinal groove tube rolling die, and the rolling die rotates driven by the main power of the equipment. The pipe to be processed can rotate and move forward simultaneously under the rotational acting force of the rolling die, so as to obtain a longitudinal groove tube. The Chinese patent with the publication number CN 206046754 and the name of "A Longitudinal Groove Tube Processing Device" discloses a longitudinal groove tube processing device, which is basically the same as the technical solution disclosed in CN 203955815U, and also adopts a device similar to a three-axis thread rolling machine, replaces the thread rolling die with a longitudinal groove tube rolling die, and obtains a longitudinal groove tube through rolling.

[0004] The advantages of these processing equipment for longitudinal groove tubes in the prior art are simple processes, and the disadvantages are slow efficiency. The axial component force of the rolling die is used as the driving force for the pipe to be processed to move forward, and the included angle is usually 2-5°. When the angle is small, the component force is small, so the speed is slow, usually the speed is 0.3-0.5 m / min. In addition, during the processing of the external longitudinal groove, the pipe to be processed is repeatedly rolled by the die, and the work hardening is obvious, so the influence on the material is relatively large. Content of the Utility Model

[0005] The purpose of the utility model is to provide a processing device for an external longitudinal groove tube used in an efficient heat exchanger, so as to solve the problems of slow processing speed and high work hardening rate of the material of the external longitudinal groove tube in the prior art.

[0006] The utility model adopts the following technical solutions: A processing device for external longitudinal groove pipes of an efficient heat exchanger, which includes a machine tool support, a grooving assembly, a indexing assembly, and a drawing assembly. Among them: The grooving assembly includes a first support plate, a first hollow hydraulic chuck, and a grooving die. The first support plate is vertically arranged and fixed on the machine tool support. The first hollow hydraulic chuck includes a chuck seat fixedly connected to the first support plate and a chuck jaw installed on the chuck seat. The chuck seat is fixedly installed on the machine tool support, and the center of the chuck seat has a central hole with a horizontally arranged axis; The grooving die includes bases respectively fixed on each chuck jaw. The number of bases is the same as the number of chuck jaws. At the position of each base close to the central hole, a tool die is respectively installed. The tool dies are annularly distributed outside the central hole, and the cutting heads of the tool dies face the central hole;

[0007] The drawing assembly includes a second support plate arranged vertically and a power mechanism for driving the second support plate to move towards or away from the first support plate. The second support plate is slidably installed on the machine tool support. The second support plate is spaced and parallel to the first support plate. A second hydraulic hollow chuck for clamping the end of the pipe to be processed is provided on the second support plate;

[0008] The indexing assembly includes a movable indexing plate and a fixed indexing plate respectively arranged on both sides of the second support plate. The second hollow hydraulic chuck and the movable indexing plate are located on the same side of the second support plate. The movable indexing plate is inserted into the pipe to be processed. A central rod is fixedly connected to the center of the movable indexing plate. The other end of the central rod passes through the second support plate and the fixed indexing plate in sequence. An elastic sleeve is sleeved outside one end of the central rod close to the movable indexing plate. The inner and outer walls of the elastic sleeve are respectively attached to the central rod and the inner wall of the pipe to be processed. An extrusion assembly is provided on one side of the elastic sleeve close to the second support plate. A pressing assembly is connected between the central rod and the fixed indexing plate.

[0009] As a preferred technical solution, an active support assembly is provided at the position between the machine tool support and the indexing assembly. The active support assembly includes a fixed column. A rotating cylinder is provided at the top of the fixed column. The rotating end of the rotating cylinder is fixedly connected to a cross beam. The other end of the cross beam is connected to a jacking cylinder. The piston end of the jacking cylinder faces upwards and is connected to a support block. A groove for supporting the pipe to be processed is provided on the upper surface of the support block.

[0010] As a preferred technical solution, the machine tool support includes a first support and a second support. The first support plate is installed on the first support. The second support plate is installed on the second support; The fixed column is fixedly connected to the second support.

[0011] As a preferred technical solution, the power mechanism includes a bottom plate and a driving motor. The second support plate is fixedly connected to the bottom plate. The bottom plate is slidably assembled on the machine tool support. The driving motor is used to drive the bottom plate to move.

[0012] As a preferred technical solution, a linear guide rail is provided on the machine tool support. A slider slidably assembled on the linear guide rail is connected to the bottom surface of the second support plate. A rack parallel to the linear guide rail is provided on the machine tool support. The driving motor is installed on the second support plate, and an output end of the driving motor is connected to a gear meshing with the rack.

[0013] As a preferred technical solution, a lining core component is provided on the machine tool support. The grooving component is located between the lining core component and the indexing component. The lining core component includes a fixed seat and a support rod. One end of the support rod is installed in the fixed seat, and the other end is inserted into the pipe to be machined.

[0014] As a preferred technical solution, the machine tool support includes a third support, and the fixed seat is fixed on the third support.

[0015] As a preferred technical solution, the base of the grooving die includes a base pressing block. The base pressing block is fixedly connected to the claw by bolts. A die combining block for installing a cutter die is provided on the base. A bearing is installed on the die combining block through a core shaft. The cutter die is an annular structure installed outside the bearing. Die clamping pieces for clamping the cutter die are respectively provided on two end faces of the bearing.

[0016] As a preferred technical solution, the extrusion component includes an extrusion ring and an extrusion nut. The extrusion ring is located between the elastic sleeve and the extrusion nut. The extrusion nut is threadedly connected to the central rod. The elastic sleeve is a rubber sleeve. The pressing component includes a gasket and a fixing nut. The fixing nut is threadedly connected to the central rod, and the gasket is pressed between the fixing nut and the fixed indexing plate.

[0017] As a preferred technical solution, the first hollow hydraulic chuck is a six-jaw chuck or an eight-jaw chuck, and the second hollow hydraulic chuck is a six-jaw chuck or an eight-jaw chuck.

[0018] The beneficial effects of the present utility model are as follows: The present utility model adjusts the processing depth of the external groove of the pipe to be machined by adjusting the contraction amount of the first hollow hydraulic chuck. Under the driving action of the drawing component, a plurality of uniformly distributed longitudinal grooves are simultaneously machined on the outer surface of the pipe to be machined by using the cutter die. Then, the pipe is rotated by a certain angle by using the indexing component and drawn again. After repeating several times, the final external longitudinal groove pipe is obtained. The intermediate processing length is adjustable, and the smooth pipes can be reserved at both ends. The present utility model can quickly pull out a plurality of uniformly distributed longitudinal grooves on the outer surface of the pipe to be machined at one time. With the cooperation of the indexing component, the final external longitudinal groove pipe can be obtained after 3 to 5 times of drawing. It is the processing method with the highest processing efficiency at present. The drawing speed can reach 3 to 5 m / min, and the material processing hardening rate is the lowest. The material only undergoes one plastic deformation.

[0019] As a preferred technical solution, the movable support assembly can support the pipe to be processed. During use, first, the rotary cylinder is activated, driving the crossbeam to rotate 90° to move the grooved support block to the bottom of the pipe. Then, the ejector cylinder is activated to make the support block support the bottom of the pipe, realizing the support of the pipe and keeping the pipe stable during the processing.

[0020] As a preferred technical solution, the use of the inner lining core assembly can further keep the pipe to be processed stable. The support rod of the inner lining core assembly is inserted into one end of the pipe, and the forces at both ends of the pipe are balanced, resulting in higher stability during the processing.

[0021] As a preferred technical solution, the machine tool support is composed of three parts. The first support is used to install the first hollow hydraulic chuck and the grooving assembly, the third support is used to install the inner lining core assembly, and the second support is used to install the linear guide rails and the rack and pinion of the movable support assembly and the drawing assembly. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a processing device for an external longitudinal groove pipe used in an efficient heat exchanger according to an embodiment of the present invention;

[0023] Figure 2 is Figure 1 the schematic structural diagram of the grooving assembly in

[0024] Figure 3 is Figure 2 the side view of the connection between a single jaw and the base in

[0025] Figure 4 is Figure 1 the schematic diagram of the indexing assembly in

[0026] Figure 5 is Figure 4 the right view of

[0027] Figure 6 is Figure 1 the partial enlarged view of the indexing assembly in

[0028] Figure 7 is Figure 1 the schematic diagram of the drawing assembly in

[0029] Figure 8 is Figure 6 the right view of

[0030] Figure 9 is Figure 1 the schematic diagram of the movable support assembly of

[0031] Figure 10 is Figure 8 the right view of

[0032] Figure 11 It is a cross-sectional view of the processed outer longitudinal groove tube.

[0033] In the figure: 1 - grooving assembly, 2 - indexing assembly, 3 - drawing assembly, 4 - movable support assembly, 5 - machine tool bracket, 6 - inner lining core assembly, 7 - pipe fitting to be processed;

[0034] 11 - first hollow hydraulic chuck, 12 - base pressing block, 13 - jaw, 14 - base, 15 - combining module, 16 - mandrel, 17 - bearing, 18 - tool die clamping piece, 19 - tool die, 110 - first support plate;

[0035] 21 - fixed indexing plate, 22 - movable indexing plate, 23 - center rod, 24 - elastic sleeve, 25 - extrusion ring, 26 - extrusion nut, 27 - gasket, 28 - fixing nut;

[0036] 31 - second hollow hydraulic chuck, 32 - motor base, 33 - driving motor, 34 - coupling, 35 - slider, 36 - linear guide rail, 37 - gear, 38 - gear shaft, 39 - rack, 310 - guide rail base, 311 - second support plate, 312 - base plate;

[0037] 41 - fixed column, 42 - rotating cylinder, 43 - cross beam, 44 - support block, 45 - ejecting cylinder;

[0038] 51 - first bracket, 52 - second bracket, 53 - third bracket;

[0039] 61 - fixed seat, 62 - support rod. Specific embodiments

[0040] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] The structure of the processing device for the outer longitudinal groove tube for an efficient heat exchanger according to an embodiment of the present invention is as Figures 1 to 9 shown. The processing device for the outer longitudinal groove tube for an efficient heat exchanger in this embodiment includes a machine tool bracket 5, a grooving assembly 1, an indexing assembly 2, and a drawing assembly 3, and the overall structure is as Figure 1 shown.

[0042] As Figures 1 to 3As shown in the figure, the grooving assembly 1 includes a first support plate 110, a first hollow hydraulic chuck 11, and a grooving die. The first support plate 110 is vertically arranged and fixedly mounted on the machine tool bracket 5. The first hollow hydraulic chuck 11 is a six-jaw chuck or an eight-jaw chuck. The first hollow hydraulic chuck 11 includes a chuck base fixedly connected to the first support plate 110 and jaws 13 mounted on the chuck base. The chuck base is fixedly installed on the machine tool bracket 1, and the center of the chuck base has a central hole horizontally arranged axially. The grooving die includes bases 14 respectively fixed on each jaw 13. The number of bases 14 is the same as the number of jaws 13. At a position of each base 14 close to the central hole, a tool die 19 is respectively installed. The tool dies 19 are annularly distributed outside the central hole, and the cutting heads of the tool dies 19 face the central hole. The base 14 of the grooving die includes a base pressing block 12. The base pressing block 12 is fixedly connected to the jaw 13 by bolts. A die combining block 15 for installing the tool die 19 is provided on the base 14. A bearing 17 is installed on the die combining block through a mandrel 16. The tool die 19 is an annular structure installed outside the bearing 17. Tool die clamping pieces 18 for clamping the tool die 19 are respectively provided on both end faces of the bearing 17. The first hollow hydraulic chuck 11 is a multi-jaw chuck. In this embodiment, a six-jaw chuck is adopted, and the matching jaws are soft jaws, and secondary processing is required to meet the installation requirements of the grooving assembly. In the grooving assembly, the tool die can be replaced separately.

[0043] As Figures 7 to 8 shown, the drawing assembly 3 includes a vertically arranged second support plate 311 and a power mechanism for driving the second support plate 311 to move towards or away from the first support plate. The second support plate 311 is slidably installed on the machine tool bracket 5. The second support plate 311 is spaced and parallel to the first support plate 110. A second hydraulic hollow chuck 31 for clamping the end of the pipe to be processed is provided on the second support plate 311. The second hollow hydraulic chuck 31 is a six-jaw chuck or an eight-jaw chuck.

[0044] The power mechanism includes a bottom plate 312 and a driving motor 32. The second support plate 311 is fixedly connected to the bottom plate 312. The bottom plate 312 is slidably assembled on the machine tool bracket 5. The driving motor 32 is used to drive the bottom plate 312 to move. A linear guide 36 is provided on the machine tool bracket 5. A slider 35 slidably assembled on the linear guide 36 is connected to the bottom surface of the second support plate 311. A rack 39 parallel to the linear guide 36 is provided on the machine tool bracket 5. The driving motor 33 is installed on the second support plate 311. The output end of the driving motor 32 is connected to a gear 37 meshing with the rack 39. The second hollow hydraulic chuck 31 clamps and fixes the pipe 7 to be processed to keep it stationary. The driving motor 33 drives the gear 37 to rotate. Under the action of the rack 39, the bottom plate 312 drives the second hollow hydraulic chuck 31 and the pipe 7 to be processed to move linearly along the linear guide.

[0045] The structure of the indexing component is as follows Figures 4 to 6 shown. The indexing component 2 is used to adjust the angle of the pipe fitting 7 to be processed. The indexing component includes a movable indexing disc 22 and a fixed indexing disc 21 respectively arranged on both sides of the second support plate 311. The second hollow hydraulic chuck 31 and the movable indexing disc 22 are located on the same side of the second support plate 311. The movable indexing disc 22 is inserted into the pipe fitting 7 to be processed. A central rod 23 is fixedly connected to the center of the movable indexing disc 22. The other end of the central rod 23 passes through the second support plate 311 and the fixed indexing disc 21 in sequence. An elastic sleeve 24 is sleeved outside one end of the central rod 23 close to the movable indexing disc 22. The inner and outer walls of the elastic sleeve 24 are respectively attached to the central rod 23 and the inner wall of the pipe fitting 7 to be processed. An extrusion component is arranged on one side of the elastic sleeve 24 close to the second support plate 311. A pressing component is connected between the central rod 23 and the fixed indexing disc 21. The extrusion component includes an extrusion ring 25 and an extrusion nut 26. The extrusion ring 25 is located between the elastic sleeve 24 and the extrusion nut 26. The extrusion nut 26 is threadedly connected to the central rod 23. The elastic sleeve 24 is a rubber sleeve. The pressing component includes a gasket 27 and a fixing nut 28. The fixing nut 28 is threadedly connected to the central rod 23. The gasket 27 is pressed between the fixing nut 28 and the fixed indexing disc 22.

[0046] As Figures 9 to 10 shown, an active support component 4 is arranged at the position between the grooving component 1 and the indexing component 2 on the machine tool support. The active support component 4 includes a fixed column 41. A rotating cylinder 42 is arranged at the top of the fixed column 41. The rotating end of the rotating cylinder 42 is fixedly connected with a cross beam 43. The other end of the cross beam 43 is connected with a jacking cylinder 45. The piston end of the jacking cylinder 45 is arranged upward and connected with a support block 44. A groove for supporting the pipe fitting 7 to be processed is arranged on the upper surface of the support block 44. The active support component 4 is used for the intermediate support during the processing of long pipes, usually at an interval of 2 meters.

[0047] An inner lining core component 6 is arranged on the machine tool support 5. The grooving component 1 is located between the inner lining core component 6 and the indexing component 2. The inner lining core component 6 includes a fixed seat 61 and a support rod 62. A core head is arranged in the fixed seat 61. One end of the support rod 62 is fixedly connected with the core head, and the other end is inserted into the pipe fitting 7 to be processed. The support rod 62 includes a pull rod and a core rod. The pull rod is a hollow stainless steel pipe. The core rod is located inside the pull rod. Emulsifying liquid passes through the inside of the pull rod, which has the dual functions of cooling and lubrication to ensure the smooth progress of processing.

[0048] The machine tool support 5 includes a first support 51 and a second support 52. The first support plate 110 is installed on the first support 51. The second support plate 311 is installed on the second support 52. The fixed column 41 is fixedly connected to the second support 52. The machine tool support 5 includes a third support 53. The fixed seat 61 is fixed on the third support 53.

[0049] The machine tool support 5 consists of three parts. The first support 51 is used to install the first hollow hydraulic chuck 11 in the grooving assembly. The third support 53 is used to install the inner lining core assembly. The second support 52 is used to install the movable support assembly 4 and the linear guide 36, gear 37, and rack 39 of the drawing assembly 3.

[0050] When installing the external longitudinal groove pipe processing device of this embodiment, first install the grooving assembly 1. Calculate and install the position of the soft jaws according to the depth of the external longitudinal groove to ensure that the installation positions of each soft jaw are consistent. At the same time, install the mandrel inside the bearing and install the tool die 19 outside the bearing. And install tool die clamping pieces 18 on both sides of the tool die 19. The whole is installed in the left and right combined modules. The left and right combined modules are fixed by double nuts at the lower part, and then connected and fixed to the base 14 through double nuts at the upper part. The whole is inserted into the groove of the modified soft jaws, and finally fixed by the base pressing block 12. Repeat the installation of other jaws in this way, and finally complete the installation of the grooving assembly 1.

[0051] After completing the installation of the grooving assembly 1, then install the inner lining core assembly 6. First, select a core head with a suitable outer diameter for the specification of the pipe fitting 7 to be processed to prevent the outer diameter of the pipe fitting 7 to be processed from exceeding the standard. In addition, adjust the position of the core head according to the position of the tool die 19 to ensure that the instantaneous deformation area of the pipe fitting 7 to be processed is supported by the support rod 62, avoid the outer diameter from exceeding the standard, and at the same time ensure the flow of the emulsified liquid inside the pipe.

[0052] After the mold is installed, thread the pipe and load the material, and start the drawing preparation. First, fix the fixed indexing plate 21 with bolts, then insert the center rod 23 into the pipe fitting 7 to be processed, and turn the extrusion nut 26 to make the extrusion ring 25 extrude the elastic sleeve 24. Connect the pipe fitting 7 to be processed and the movable indexing plate 22 through the elastic sleeve 24. The elastic sleeve 24 deforms and expands to fix the movable indexing plate 22 inside the end of the pipe fitting 7 to be processed.

[0053] After installing the indexing assembly 2, the first hollow hydraulic chuck 11 of the grooving assembly 1 closes, and the drawing process starts. The second hollow hydraulic chuck 31 clamps the end of the pipe fitting 7 to be processed. Under the action of the drawing assembly 3, the pipe fitting 7 to be processed is pulled to move in a straight line at a speed of 3 m / min, so that 6 longitudinal grooves are evenly distributed on the outer surface of the pipe fitting 7 to be processed. When the drawing length exceeds 2.5 meters, the movable support assembly 4 starts to support the pipe fitting 7 to be processed. First, the rotating cylinder 42 starts, driving the cross beam to rotate 90° to move the grooved support block 44 to the bottom of the pipe fitting, and then the ejecting cylinder 45 starts to make the support block 44 support under the bottom of the pipe.

[0054] Then, release the second hollow hydraulic chuck 31. After rotating the movable indexing plate 22 by a certain angle, the second hollow hydraulic chuck 31 clamps the pipe fitting again, and the drawing assembly 3 quickly resets and starts drawing again. After repeating the drawing 5 times in this way, 30 longitudinal grooves evenly distributed are obtained on the outer surface of the pipe fitting to be processed, and the processing of the outer longitudinal groove pipe is completed. The cross-section of the processed outer longitudinal groove pipe is as shown in Figure 11 shown.

[0055] The above embodiments are preferred embodiments of the present invention. Without departing from the spirit and scope of the present invention, there will be various changes and improvements to the present invention, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An external longitudinal groove tube processing device for an efficient heat exchanger, characterized in that, It includes a machine tool support, a grooving assembly, an indexing assembly, and a drawing assembly, where: The grooving assembly includes a first support plate, a first hollow hydraulic chuck, and a grooving die. The first support plate is vertically arranged and fixed on the machine tool support. The first hollow hydraulic chuck includes a chuck seat fixedly connected to the first support plate and jaws installed on the chuck seat. The chuck seat is fixedly installed on the machine tool support, and the center of the chuck seat has a central hole with an axially horizontal setting. The grooving die includes bases respectively fixed on each jaw. The number of bases is the same as the number of jaws. At a position near the central hole of each base, a tool die is installed respectively. The tool dies are annularly distributed outside the central hole, and the cutting heads of the tool dies face the central hole. The drawing assembly includes a vertically arranged second support plate and a power mechanism for driving the second support plate to move towards or away from the first support plate. The second support plate is slidably installed on the machine tool support. The second support plate is spaced and parallel to the first support plate. A second hydraulic hollow chuck for clamping the end of the pipe to be processed is provided on the second support plate. The indexing assembly includes a movable indexing plate and a fixed indexing plate respectively arranged on both sides of the second support plate. The second hollow hydraulic chuck and the movable indexing plate are located on the same side of the second support plate. The movable indexing plate is inserted into the pipe to be processed. A central rod is fixedly connected to the center of the movable indexing plate. The other end of the central rod passes through the second support plate and the fixed indexing plate in sequence. An elastic sleeve is sleeved outside one end of the central rod close to the movable indexing plate. The inner and outer walls of the elastic sleeve are respectively in contact with the central rod and the inner wall of the pipe to be processed. An extrusion assembly is provided on one side of the elastic sleeve close to the second support plate. A pressing assembly is connected between the central rod and the fixed indexing plate.

2. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 1, wherein: An active support assembly is provided at the position of the machine tool support between the grooving assembly and the indexing assembly. The active support assembly includes a fixed column. A rotating cylinder is provided at the top of the fixed column. A cross beam is fixedly connected to the rotating end of the rotating cylinder. The other end of the cross beam is connected with a jacking cylinder. The piston end of the jacking cylinder is arranged upwards and connected with a support block. A groove for supporting the pipe to be processed is provided on the upper surface of the support block.

3. The processing device for external longitudinal groove tubes used in high-efficiency heat exchangers according to claim 2, wherein: The machine tool support includes a first support and a second support. The first support plate is installed on the first support. The second support plate is installed on the second support. The fixed column is fixedly connected to the second support.

4. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 1, characterized in that: The power mechanism includes a bottom plate and a driving motor. The second support plate is fixedly connected to the bottom plate. The bottom plate is slidably assembled on the machine tool support. The driving motor is used to drive the bottom plate to move.

5. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 4, characterized in that: A linear guide rail is provided on the machine tool support. A slider slidably assembled on the linear guide rail is connected to the bottom surface of the second support plate. A rack parallel to the linear guide rail is provided on the machine tool support. The driving motor is installed on the second support plate. The output end of the driving motor is connected with a gear meshing with the rack.

6. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 1, characterized in that: An inner lining core assembly is provided on the machine tool support. The grooving assembly is located between the inner lining core assembly and the indexing assembly. The inner lining core assembly includes a fixed seat and a support rod. One end of the support rod is installed in the fixed seat and the other end is inserted into the pipe to be processed.

7. The external longitudinal groove tube processing device according to claim 6, characterized in that: The machine tool support includes a third support. The fixed seat is fixed on the third support.

8. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 1, characterized in that: The base of the grooving die includes a base pressing block, which is fixedly connected to the chuck by bolts. A die combining block for installing a cutting die is provided on the base. A bearing is installed on the die combining block through a mandrel. The cutting die is an annular structure installed outside the bearing. Die clamping pieces for clamping the cutting die are respectively provided on both end faces of the bearing.

9. The processing device for the external longitudinal groove tube used in the high-efficiency heat exchanger according to claim 1, wherein: The extrusion assembly includes an extrusion ring and an extrusion nut. The extrusion ring is located between the elastic sleeve and the extrusion nut. The extrusion nut is threadedly connected to the center rod. The elastic sleeve is a rubber sleeve. The pressing assembly includes a gasket and a fixing nut. The fixing nut is threadedly connected to the center rod. The gasket is pressed between the fixing nut and the fixed indexing plate.

10. The processing device for external longitudinal groove tubes used in high-efficiency heat exchangers according to claim 1, wherein: The first hollow hydraulic chuck is a six-jaw chuck or an eight-jaw chuck, and the second hollow hydraulic chuck is a six-jaw chuck or an eight-jaw chuck.

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