Automatic tapping machine for heat exchanger tube plate

Abstract

The utility model discloses a heat exchanger tube plate automatic tapping machine which comprises a machine frame, a lifting assembly, a moving assembly, a drilling assembly and a clamping assembly, the moving assembly is arranged at one end of the top of the machine frame, the clamping assembly is installed at the other end of the top of the machine frame, and the bottom of the lifting assembly is installed on the moving assembly. The lifting assembly is provided with the drilling assembly, the lifting assembly drives the drilling assembly to move up and down, and the drilling assembly is located above the clamping assembly. The automatic tapping machine for the heat exchanger tube plate is high in production efficiency and product quality, the positions of threaded holes are consistent, and follow-up installation is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of chemical machinery and equipment, and more specifically to an automatic tapping machine for a tube sheet of a heat exchanger. Background Art

[0002] Heat exchanger is an energy-saving device that realizes heat transfer between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization. The heat exchanger industry involves nearly 30 industries such as HVAC, pressure vessels, reclaimed water treatment equipment, chemicals, and petroleum.

[0003] The tubular heat exchanger has a tube body, tube sheets at both ends, a head, and a number of heat exchange tubes, which are fixed on the tube sheets to achieve heat transfer. The structure of the heat exchanger tube sheet is circular with a number of mounting holes in the middle. The heat exchange tubes are connected to the mounting holes through seals. There is a circle of threaded mounting holes on the outside of the tube sheet for connecting the tube body and the head.

[0004] The existing threaded installation holes need to be opened first, and then the threads are drilled manually. This has the disadvantage of low efficiency and the angle of entry of the tapping tool cannot be guaranteed to be completely consistent each time, which will cause inconvenience to the subsequent installation. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide an automatic tapping machine for a heat exchanger tube sheet with high production efficiency, high product quality, and consistent positions of threaded holes for easy subsequent installation.

[0006] According to one aspect of the utility model, a heat exchanger tube sheet automatic tapping machine is provided, comprising: a frame, a lifting assembly, a moving assembly, a drilling assembly and a clamping assembly, wherein the moving assembly is arranged at one end of the top of the frame, the clamping assembly is installed at the other end of the top of the frame, the bottom of the lifting assembly is installed on the moving assembly, the drilling assembly is arranged on the lifting assembly and the lifting assembly drives the drilling assembly to move up and down, and the drilling assembly is located above the clamping assembly. The lifting assembly facilitates the drilling assembly to tap the hole, the moving assembly facilitates the adjustment of the distance between the drilling assembly and the tube sheet workpiece to adapt to the use of tube sheets of different specifications for tapping, and the clamping assembly can clamp the tube sheet workpiece and drive the workpiece to rotate to facilitate the tapping of multiple holes.

[0007] In some embodiments, the moving assembly includes: a first linear rail, a first slider and a first mounting plate, wherein two first linear rails are provided and are parallelly mounted on the frame, the first slider is sleeved on the first linear rail, the bottom of the first mounting plate is fixedly connected to the first slider, and a lifting assembly is vertically arranged on the first mounting plate. The first slider moves on the first linear rail to adjust the distance between the drilling assembly mounted on the first mounting plate and the clamping assembly to adapt to different specifications of tube sheet tapping.

[0008] In some embodiments, the lifting assembly includes: a column, a second linear rail, a second slider, a second mounting plate, and a driving member, the bottom of the column is fixed on the first mounting plate, two second linear rails are provided and are installed in parallel on the column, the second slider is sleeved on the second linear rail, the second mounting plate is fixedly connected to the second slider, a drilling assembly is arranged on the second mounting plate, the driving member is installed on the column, the output end of the driving member is connected to the second mounting plate and drives the second mounting plate to reciprocate on the second linear rail. The second mounting plate is driven up and down by the driving member to realize the tapping of the tube sheet by the drilling assembly.

[0009] In some embodiments, the driving member is a cylinder.

[0010] In some embodiments, the drilling assembly includes: a first motor, a reduction box and a tap, wherein the first motor is fixedly connected to the second mounting plate, the bottom of the first motor is connected to the reduction box, and the output end of the reduction box is connected to the tap. The tap is driven to rotate by the first motor and the reduction box to achieve tapping of the tube sheet.

[0011] In some embodiments, the clamping assembly includes: a driving part and a clamping part, both of which are mounted on a frame, the driving part is connected to the clamping part and drives the clamping part to rotate. The driving part drives the clamping part to rotate to achieve tapping of multiple mounting holes on the tube sheet.

[0012] In some embodiments, the driving part includes: a second motor, a driving gear and a driven gear, the second motor is mounted on the back of the frame, the output end of the second motor is connected to the driving gear, the driven gear is meshed with the driving gear, and the driven gear is fixedly arranged at the bottom of the clamping part. The second motor drives the clamping part to select, thereby realizing tapping of multiple mounting holes on the tube sheet.

[0013] In some embodiments, the clamping part includes: a rotating disk, a mounting block, a pneumatic chuck, a third linear rail, a third slider, an extension block and a claw, the bottom of the rotating disk is fixedly connected to the driven gear, the mounting block is arranged on the outside of the rotating disk through a bearing sleeve, the mounting block is fixedly connected to the frame, the driven gear is located on the back of the frame, the pneumatic chuck is installed at the center of the rotating disk, the third slider is fixed on the rotating disk, the third linear rail is inserted in the third slider, the pneumatic chuck is connected to the third linear rail, the top of the third linear rail is fixedly installed with an extension block, and the claw is connected to the extension block through a detachable component. The pneumatic chuck drives the third linear rail to move to achieve clamping of the tube sheet workpiece, and the cooperation of the extension block and the claw facilitates the clamping of large-sized tube sheets.

[0014] In some embodiments, the detachable parts include: a dovetail groove, a sliding block, a limiting groove, a limiting block and a locking bolt, the dovetail groove is arranged on the extension block, the sliding block is fixedly connected to the bottom of the claw, the sliding block is arranged in the dovetail groove and can slide in the dovetail groove, and the center of the claw is limited on the extension block by the locking bolt. The movement and fixation of the claw on the extension block are realized by the cooperation of the limiting groove and the limiting block.

[0015] In some embodiments, a waste hole is provided on the frame.

[0016] The utility model discloses an automatic tapping machine for a heat exchanger tube sheet, which facilitates tapping of holes by a drilling assembly through a lifting assembly, facilitates adjustment of the distance between the drilling assembly and the tube sheet workpiece through a moving assembly, and thus adapts to the tapping of tube sheets of different specifications; the clamping assembly can clamp the tube sheet workpiece and drive the workpiece to rotate, so as to facilitate tapping operations on multiple holes; the first slider moves on the first linear rail, so as to adjust the distance between the drilling assembly installed on the first mounting plate and the clamping assembly, so as to adapt to the tapping of tube sheets of different specifications; the second mounting plate is driven up and down by a driving member to realize tapping of the tube sheet by the drilling assembly; the tap is driven to rotate by a first motor and a reduction box, so as to realize tapping of the tube sheet; the driving part drives the clamping part to rotate, so as to realize tapping of multiple mounting holes on the tube sheet; the pneumatic chuck drives the third linear rail to move, so as to realize clamping of the tube sheet workpiece, and the cooperation of the extension block and the clamping claw facilitates the clamping of the tube sheet of large size specifications; the cooperation of the limit groove and the limit block realizes the movement and fixation of the clamping claw on the extension block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model heat exchanger tube sheet automatic tapping machine;

[0018] Figure 2 It is a structural schematic diagram of the moving components of the automatic tapping machine for heat exchanger tube sheets of the utility model;

[0019] Figure 3It is a structural schematic diagram of the lifting assembly of the utility model heat exchanger tube sheet automatic tapping machine;

[0020] Figure 4 It is a structural schematic diagram of the clamping assembly of the utility model heat exchanger tube sheet automatic tapping machine;

[0021] Figure 5 It is a schematic diagram of the processing state of the automatic tapping machine for heat exchanger tube sheet of the utility model. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0023] In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the terms can be understood according to the specific circumstances.

[0024] like Figure 1 As shown, the heat exchanger tube sheet automatic tapping machine described in the utility model comprises: a frame 1, a lifting assembly 2, a moving assembly 3, a drilling assembly 4 and a clamping assembly 5. The moving assembly 3 is arranged at one end of the top of the frame 1, and the clamping assembly 5 is installed at the other end of the top of the frame 1. The bottom of the lifting assembly 2 is installed on the moving assembly 3. The drilling assembly 4 is arranged on the lifting assembly 2 and the lifting assembly 2 drives the drilling assembly 4 to move up and down. The drilling assembly 4 is located above the clamping assembly 5. The lifting assembly 2 facilitates the drilling assembly 4 to tap the hole. The moving assembly 3 facilitates the adjustment of the distance between the drilling assembly 4 and the tube sheet workpiece to adapt to the use of tube sheet tapping of different specifications. The clamping assembly 5 can clamp the tube sheet workpiece and drive the workpiece to rotate to facilitate the tapping operation of multiple holes.

[0025] The frame 1 is provided with a waste hole 6. The waste hole 6 is arranged below the drilling assembly 4, and the waste drilled out during tapping directly falls into the waste hole 6.

[0026] like Figure 2As shown, the moving assembly 3 includes: a first linear rail 31, a first slider 32 and a first mounting plate 33. The first linear rail 31 is provided with two and is installed in parallel on the frame 1. The first slider 32 is sleeved on the first linear rail 31. The bottom of the first mounting plate 33 is fixedly connected to the first slider 32. The lifting assembly 2 is vertically arranged on the first mounting plate 33. The first slider 32 is moved on the first linear rail 31 to adjust the distance between the drilling assembly 4 and the clamping assembly 5 installed on the first mounting plate 33 to adapt to different specifications of tube sheet tapping. In actual use, a locking wrench is provided on the first slider 32 to fix the first slider 32 to the first linear rail 31.

[0027] like Figure 3 As shown, the lifting assembly 2 includes: a column 21, a second linear rail 22, a second slider 23, a second mounting plate 24 and a driving member 25. The bottom of the column 21 is fixed on the first mounting plate 33. Two second linear rails 22 are provided and are installed in parallel on the column 21. The second slider 23 is sleeved on the second linear rail 22. The second mounting plate 24 is fixedly connected to the second slider 23. The drilling assembly 4 is arranged on the second mounting plate 24. The driving member 25 is installed on the column 21. The output end of the driving member 25 is connected to the second mounting plate 24 and drives the second mounting plate 24 to reciprocate on the second linear rail 22. The second mounting plate 24 is driven up and down by the driving member 25, so that the drilling assembly 4 can tap the tube sheet.

[0028] The driving member 25 is a cylinder.

[0029] The drilling assembly 4 includes: a first motor 41, a reduction box 42 and a tap 43. The first motor 41 is fixedly connected to the second mounting plate 24, the bottom of the first motor 41 is connected to the reduction box 42, and the output end of the reduction box 42 is connected to the tap 43. The tap 43 is driven to rotate by the first motor 41 and the reduction box 42 to achieve tapping of the tube sheet.

[0030] like Figure 4 As shown, the clamping assembly 5 includes: a driving part 51 and a clamping part 52, both of which are mounted on the frame 1, and the driving part 51 is connected to the clamping part 52 and drives the clamping part 52 to rotate. The driving part 51 drives the clamping part 52 to rotate, thereby realizing tapping of multiple mounting holes on the tube sheet.

[0031] The driving part 51 includes: a second motor 511, a driving gear 512 and a driven gear 513. The second motor 511 is installed on the back of the frame 1. The output end of the second motor 511 is connected to the driving gear 512. The driven gear meshes with the driving gear 512. The driven gear is fixedly arranged at the bottom of the clamping part 52. The second motor 511 drives the clamping part 52 to select, thereby realizing tapping of multiple mounting holes on the tube sheet.

[0032] The clamping portion 52 includes: a rotating disk 521, a mounting block 522, a pneumatic chuck 523, a third linear rail 524, a third slider 525, an extension block 526 and a claw 527. The bottom of the rotating disk 521 is fixedly connected to the driven gear, the mounting block 522 is arranged on the outer side of the rotating disk 521 through a bearing sleeve, the mounting block 522 is fixedly connected to the frame 1, and the driven gear is located on the back of the frame 1. The pneumatic chuck 523 is installed in the center of the rotating disk 521, the third slider 525 is fixed on the rotating disk 521, the third linear rail 524 is inserted in the third slider 525, the pneumatic chuck 523 is connected to the third linear rail 524, and the top of the third linear rail 524 is fixedly installed with an extension block 526, and the claw 527 is connected to the extension block 526 through a detachable component 528. The pneumatic chuck 523 drives the third linear rail 524 to move to clamp the tube sheet workpiece, and the cooperation of the extension block 526 and the clamping claw 527 facilitates the clamping of large-sized tube sheets. Since the existing starting chucks can only clamp small sizes, and the diameter of the tube sheet to be processed is greater than 1000 mm, the existing pneumatic chuck 523 is not competent, and the extension block 526 is connected to clamp the larger tube sheet.

[0033] During the processing, the third linear rail 524, the third slider 525, the extension block 526 and the clamping claw 527 are all provided with 3 or 4 groups, because the pneumatic chuck 523 on the market is mainly a three-jaw or four-jaw chuck. The clamping claw 527 of the pneumatic three-jaw chuck is fixedly connected to the third linear rail 524.

[0034] The detachable component 528 includes: a dovetail groove 5281, a sliding block 5282 and a locking bolt 5283. The dovetail groove 5281 is set on the extension block 526. The sliding block 5282 is fixedly connected to the bottom of the claw 527. The sliding block 5282 is set in the dovetail groove 5281 and can slide in the dovetail groove 5281. The center of the claw 527 is limited on the extension block 526 by the locking bolt 5283. The movement and fixation of the claw 527 on the extension block 526 are realized by the cooperation of the limiting groove and the limiting block. During use, the locking bolt 5283 is loosened, the claw 527 is pushed to an appropriate position, and the locking bolt 5283 is tightened.

[0035] like Figure 5 As shown, during the tapping process, follow the steps below:

[0036] S1: Adjust the position of the clamping claw 527 according to the size of the tube sheet to be tapped;

[0037] S2: Prevent the tube sheet from being hoisted onto the clamping assembly 5 by using a hoisting device;

[0038] S3: Start the chuck to drive the claw 527 to clamp the tube sheet;

[0039] S4: Release the first slider 32 to push the column 21 above the tube sheet mounting hole;

[0040] S5: Manually control the driving member 25 to move downward until the tap 43 rotates evenly in the installation hole;

[0041] S6: Manually control the driving member 25 to lift up and lock the first slider 32;

[0042] S7: Start the preset program, and the driving member 25 moves downward to tap the mounting holes on the tube sheet one by one;

[0043] S8: hoisting and placing the tapped tube sheet;

[0044] S9: Repeat the above steps 1-8.

[0045] In S5, since the position of the first slider 32 cannot be adjusted accurately, the downward movement process is a tool setting step.

[0046] In S7, while the driving member 25 moves downward, the first motor 41 rotates forward to drive the tap 43 to complete the tapping of the mounting hole. After one mounting hole is completed, the first motor 41 and the driving member 25 cooperate to lift up until the tap 43 is out of the mounting hole; then the second motor 511 works to drive the tube plate to select a preset angle so that the tap 43 is located above the adjacent mounting hole, and then repeat the above tapping steps. When the second motor 511 drives the tube plate to complete a rotation to tap all mounting holes, the workpiece needs to be replaced. Since the tap 43 has the same entry angle, the tapping quality of the completed mounting hole is high or better, and the subsequent installation is more time-saving and labor-saving.

[0047] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, other modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. Heat exchanger tube sheet automatic tapping machine, characterized in that: include: A frame, a lifting assembly, a moving assembly, a drilling assembly and a clamping assembly, wherein the moving assembly is arranged at one end of the top of the frame, the clamping assembly is installed at the other end of the top of the frame, the bottom of the lifting assembly is installed on the moving assembly, the drilling assembly is arranged on the lifting assembly and the lifting assembly drives the drilling assembly to move up and down, and the drilling assembly is located above the clamping assembly.

2. The automatic tapping machine for heat exchanger tube sheet according to claim 1, characterized in that: The moving assembly includes: a first linear rail, a first slider and a first mounting plate. The first linear rails are provided with two and are mounted in parallel on the frame. The first slider is sleeved on the first linear rail. The bottom of the first mounting plate is fixedly connected to the first slider. A lifting assembly is vertically arranged on the first mounting plate.

3. The automatic tapping machine for heat exchanger tube sheet according to claim 2, characterized in that: The lifting assembly includes: a column, a second linear rail, a second slider, a second mounting plate and a driving member, the bottom of the column is fixed on the first mounting plate, two second linear rails are provided and are mounted in parallel on the column, the second slider is sleeved on the second linear rail, the second mounting plate is fixedly connected to the second slider, a drilling assembly is arranged on the second mounting plate, the driving member is mounted on the column, the output end of the driving member is connected to the second mounting plate and drives the second mounting plate to reciprocate on the second linear rail.

4. The automatic tapping machine for heat exchanger tube sheet according to claim 3, characterized in that: The driving member is a cylinder.

5. The automatic tapping machine for heat exchanger tube sheet according to claim 4, characterized in that: The drilling assembly comprises: a first motor, a reduction box and a tap, wherein the first motor is fixedly connected to the second mounting plate, the bottom of the first motor is connected to the reduction box, and the output end of the reduction box is connected to the tap.

6. The automatic tapping machine for heat exchanger tube sheet according to claim 5, characterized in that: The clamping assembly comprises: a driving part and a clamping part, both of which are mounted on a frame, and the driving part is connected to the clamping part and drives the clamping part to rotate.

7. The automatic tapping machine for heat exchanger tube sheet according to claim 6, characterized in that: The driving part includes: a second motor, a driving gear and a driven gear, the second motor is installed on the back of the frame, the output end of the second motor is connected to the driving gear, the driven gear is meshed with the driving gear, and the driven gear is fixedly arranged at the bottom of the clamping part.

8. The automatic tapping machine for heat exchanger tube sheet according to claim 7, characterized in that: The clamping part includes: a rotating disk, a mounting block, a pneumatic chuck, a third linear rail, a third slider, an extension block and a claw. The bottom of the rotating disk is fixedly connected to the driven gear. The mounting block is arranged on the outer side of the rotating disk through a bearing sleeve. The mounting block is fixedly connected to the frame. The driven gear is located on the back of the frame. The pneumatic chuck is installed at the center of the rotating disk. The third slider is fixed on the rotating disk. The third linear rail is inserted in the third slider. The pneumatic chuck is connected to the third linear rail. The extension block is fixedly installed on the top of the third linear rail. The claw is connected to the extension block through a detachable part.

9. The automatic tapping machine for heat exchanger tube sheet according to claim 8, characterized in that: The detachable parts include: a dovetail groove, a sliding block and a locking bolt. The dovetail groove is arranged on the extension block. The sliding block is fixedly connected to the bottom of the claw. The sliding block is arranged in the dovetail groove and can slide in the dovetail groove. The center of the claw is limited on the extension block by the locking bolt.

10. The automatic tapping machine for heat exchanger tube sheet according to any one of claims 1 to 9, characterized in that: The frame is provided with a waste hole.

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