CN216706451U - Pipe plate and finned tube end weld joint removing tool for pipe plug type pipe box - Google Patents
Pipe plate and finned tube end weld joint removing tool for pipe plug type pipe box Download PDFInfo
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- CN216706451U CN216706451U CN202220246196.2U CN202220246196U CN216706451U CN 216706451 U CN216706451 U CN 216706451U CN 202220246196 U CN202220246196 U CN 202220246196U CN 216706451 U CN216706451 U CN 216706451U
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- positioning sleeve
- tube
- cutter bar
- half part
- cutter
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Abstract
The utility model discloses a cutting tool for removing welding seams at the end parts of a tube plate and a finned tube of a plug type tube box, which comprises a cutter bar, an inner positioning sleeve, an outer positioning sleeve, a pressing cap and a cutter head, wherein the cutter head is fixedly connected to the front end of the cutter bar, a radial flange structure is formed at the reducing part of the cutter bar, the inner positioning sleeve is sleeved on the rear half part of the cutter bar, the front end of the inner positioning sleeve can be abutted against the flange structure, the outer positioning sleeve is sleeved on the inner positioning sleeve, the inner diameter of the rear half part of the outer positioning sleeve is larger than that of the front half part of the outer positioning sleeve, a positioning surface is radially arranged at the reducing part inside the outer positioning sleeve, the rear end of the inner positioning sleeve is a radial boss structure, the boss structure can be abutted against the positioning surface, the pressing cap is sleeved on the rear half part of the cutter bar, and the front half part of the pressing cap sleeve is positioned inside the outer positioning sleeve and is in threaded connection with the outer positioning sleeve. The cutter has simple structure, effectively solves the problem of removing the welding seam at the tube end of the finned tube, does not damage other parts of the tube bundle, and is convenient to maintain and use.
Description
Technical Field
The utility model relates to a tool for removing weld joints at the end parts of a tube plate and a finned tube of a plug type tube box.
Background
After the air cooler tube bundle installed in a petrochemical plant and a power station is used for a long time, the finned tubes in the tube bundle and the end weld joints of the finned tubes can be corroded, the air cooler tube bundle is leaked, safety accidents are further caused, the whole device of a refinery or a power station is bound to be stopped, and inestimable loss is brought to the refinery or the power station. To repair the leakage of the weld seam between the finned tube and the end of the tube, the weld seam between the tube plate in the pipe box and the end of the finned tube must be removed completely and welded again. The width of the pipe box of the pipe plug type of each device air cooling pipe bundle is different, and the length and the size of the cutter bar of a turning tool needing to remove a welding seam are also different; resistance and moment of torsion are too big not only the tool bit is breakable, and the cutter arbor is fragile also scrapped, must arouse screw thread damage on the pipe case plug board and the inside mar that has of parent tube simultaneously when cleaing away the pipe end welding seam, increase air cooler cost of maintenance.
Disclosure of Invention
Based on the defects, the utility model aims to provide the cutter for removing the welding seams at the tube plate and the end part of the finned tube of the screwed pipe box, so as to remove the welding seams between the tube plate and the end part of the finned tube in the screwed pipe box.
The technical scheme adopted by the utility model is as follows: a cutting tool for removing welding seams at the end parts of a tube plate and a finned tube of a screwed pipe box comprises a cutter bar, an inner positioning sleeve, an outer positioning sleeve, a pressing cap and a cutter head, wherein the cutter head is fixedly connected near the front end of the cutter bar along the radial direction of the cutter bar, the outer diameter of the front half part of the cutter bar is larger than that of the rear half part of the cutter bar, a radial flange structure is formed at the diameter-changing position of the cutter bar, the inner positioning sleeve is sleeved on the rear half part of the cutter bar, the front end of the inner positioning sleeve can be abutted against the flange structure, the inner diameter of the front half part of the outer positioning sleeve corresponds to that of the inner positioning sleeve, the outer positioning sleeve is sleeved on the inner positioning sleeve, the inner diameter of the rear half part of the outer positioning sleeve is larger than that of the front half part of the outer positioning sleeve, a positioning surface is radially arranged at the diameter-changing position inside the outer positioning sleeve, and the rear end of the inner positioning sleeve is of a radial boss structure, the boss structure can abut against the positioning surface, the pressing cap is sleeved on the rear half part of the cutter bar, and the front half part of the pressing cap sleeve is positioned in the outer positioning sleeve and is in threaded connection with the outer positioning sleeve; the outer wall of the front end of the outer positioning sleeve is in threaded connection with a screw plug hole of the screw plug type pipe box, so that the cutter bar, the screw plug hole and the finned pipe are coaxial.
Furthermore, a slot is formed near the front end of the cutter bar along the radial direction, the cutter head is inserted into the slot, a through hole leading to the slot is formed in the head part of the front end of the cutter bar along the axial center, and a screw is in threaded connection with the through hole and used for fixing the cutter head.
Furthermore, the rear half part of the cutter bar is also sleeved with a thrust bearing which is positioned inside the outer positioning sleeve and between the inner positioning sleeve and the pressing cap sleeve.
Further, the thrust bearing adopts a thrust ball bearing.
Furthermore, the inner positioning sleeve is in axial clearance fit with the rear half part of the cutter bar, and the outer positioning sleeve is in axial clearance fit with the inner positioning sleeve.
Furthermore, the front end of the cutter bar is also sleeved with a protective sleeve which is positioned between the head of the cutter bar and the cutter head.
Furthermore, the inner positioning sleeve has various lengths, and the inner positioning sleeve with the proper length is selected according to the width of the plug type pipe box.
The utility model has the advantages and beneficial effects that: the cutter has simple structure, effectively solves the problem of removing the welding seam at the tube end of the finned tube, does not damage other parts of the tube bundle, and is convenient to maintain and use. When in use, the manual operation is adopted, the rotation is stable, the uniform forward feeding can be realized, and the stability during the welding seam marking can be ensured by adopting the thread positioning.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention;
Detailed Description
The utility model will be further illustrated by way of example with reference to the accompanying drawings.
Example 1
As shown in figure 1, the pipe plate and finned tube end weld cleaning tool for the screwed pipe box comprises a cutter bar 1, an inner positioning sleeve 2, an outer positioning sleeve 3, a pressing cap 4 and a cutter head 5, wherein a slot is formed near the front end of the cutter bar 1 along the radial direction, the cutter head 5 is inserted into the slot, a through hole leading to the slot is formed in the head part of the front end of the cutter bar 1 along the axial center, a screw 7 is in threaded connection with the through hole for fixing the cutter head 5, the outer diameter of the front half part of the cutter bar 1 is larger than that of the rear half part of the cutter bar 1, a radial flange structure is formed at the reducing position of the cutter bar 1, the inner positioning sleeve 2 is sleeved on the rear half part of the cutter bar 1, the front end of the inner positioning sleeve 2 can abut against the flange structure, the inner diameter of the front half part of the outer positioning sleeve 3 corresponds to the outer diameter of the inner positioning sleeve 2, the outer positioning sleeve 3 is sleeved on the inner positioning sleeve 2, the inner diameter of the rear half part of the outer positioning sleeve 3 is larger than that of the front half part of the outer positioning sleeve, a positioning surface is radially arranged at the reducing position in the outer positioning sleeve 3, the rear end of the inner positioning sleeve 2 is a radial boss structure, the boss structure can be abutted against the positioning surface, the pressing cap sleeve 4 is arranged on the rear half part of the cutter bar 1, and the front half part of the pressing cap sleeve 4 is positioned in the outer positioning sleeve 3 and is in threaded connection with the outer positioning sleeve 3; the outer wall of the front end of the outer positioning sleeve 3 is in threaded connection with a screwed plug hole of the screwed plug type pipe box, so that the cutter bar 1, the screwed plug hole and the finned pipe are coaxial. The rear half part of the cutter bar 1 is also sleeved with a thrust bearing 8 which is positioned inside the outer positioning sleeve 3 and between the inner positioning sleeve 2 and the pressing cap sleeve 4. The thrust bearing 8 adopts a thrust ball bearing. The inner positioning sleeve 2 is in axial clearance fit with the rear half part of the cutter bar 1, and the outer positioning sleeve 3 is in axial clearance fit with the inner positioning sleeve 2. The front end of the cutter bar 1 is also sleeved with a protective sleeve 6 which is positioned between the head of the cutter bar 1 and the cutter head 5. The inner positioning sleeve 2 has various lengths.
The using method comprises the following steps:
as shown in fig. 2, when repairing the welding seam between the tube plate and the finned tube of the pipe plug type pipe box on site, the pipe box plug at the end of the leaking pipe is removed, and the pipe box is cleaned. The extending distance of the cutter head 5 is adjusted according to the size of a welding seam at the pipe end, and the cutter head 5 and a protective sleeve 6 (preventing the inner wall of the pipe from being damaged during working) are fixed on the cutter bar 1 by a screw 7; selecting an inner positioning sleeve 2 with a proper length according to the width of the plug type pipe box, and then assembling the inner positioning sleeve 2, a thrust ball bearing and a pressing cap 4 together in sequence and sleeving on a cutter bar 1 to ensure that the axis of the cutter bar 1 is coincident with the axis of a plug hole and the axis of a finned tube; when the device is used, the outer positioning sleeve 3 is screwed in a screw plug hole of a screw plug plate of a tube box, the cutter bar 1 is inserted into the tube box from the screw plug hole, a screw 7 and a protective sleeve 6 at the head of the cutter bar 1 are inserted into a finned tube, and the cutter head 5 is propped against a weld joint at the end of the finned tube; the end welding seam of the finned tube is removed by rotating a tool shank at the tail end of the tool bar 1 by a wrench, namely, a tool bit 5 on the tool bar 1 can be rotated, the pressing cap 4 is rotated at times when the tool bar 1 is rotated, feeding is adjusted, and finally the end welding seam is removed completely.
Example 2
According to the cutter structure in the embodiment 1, the length of the steel pipe can be shortened in the plug type pipe box, and the requirement for welding size between the steel pipe and the pipe plate is met.
Claims (7)
1. The utility model provides a cutter is clear away to tube sheet and finned tube tip welding seam for plug formula pipe case, contains cutter arbor (1), interior position sleeve (2), outer position sleeve (3), presses cap (4) and tool bit (5), its characterized in that: near the front end of the cutter bar (1), a cutter head (5) is fixedly connected along the radial direction of the cutter bar (1), the outer diameter of the front half part of the cutter bar (1) is larger than that of the rear half part, a radial flange structure is formed at the reducing position of the cutter bar (1), the inner positioning sleeve (2) is sleeved on the rear half part of the cutter bar (1), the front end of the inner positioning sleeve (2) can be abutted against the flange structure, the inner diameter of the front half part of the outer positioning sleeve (3) is corresponding to the outer diameter of the inner positioning sleeve (2), the outer positioning sleeve (3) is sleeved on the inner positioning sleeve (2), the inner diameter of the rear half part of the outer positioning sleeve (3) is larger than that of the front half part, a positioning surface is radially arranged at the reducing position inside the outer positioning sleeve (3), and the rear end of the inner positioning sleeve (2) is of a radial boss structure, the boss structure can be abutted against the positioning surface, the pressing cap (4) is sleeved on the rear half part of the cutter bar (1), and the front half part of the pressing cap (4) is positioned in the outer positioning sleeve (3) and is in threaded connection with the outer positioning sleeve; the outer wall of the front end of the outer positioning sleeve (3) is in threaded connection with a screw plug hole of the screw plug type tube box, so that the cutter bar (1), the screw plug hole and the finned tube are coaxial.
2. The tube sheet and fin tube end weld removal tool for a threaded tube box of claim 1, wherein: an inserting groove is formed in the position close to the front end of the cutter rod (1) in the radial direction, the cutter head (5) is inserted into the inserting groove, a through hole leading to the inserting groove is formed in the head portion of the front end of the cutter rod (1) in the axial direction, and a screw (7) is in threaded connection with the through hole and used for fixing the cutter head (5).
3. The tube sheet and fin tube end weld removal tool for a threaded tube box of claim 1, wherein: the rear half part of the cutter bar (1) is also sleeved with a thrust bearing (8) which is positioned inside the outer positioning sleeve (3), between the inner positioning sleeve (2) and the pressing cap (4).
4. A tube sheet and fin tube end weld removal tool for a threaded tube box according to claim 3, wherein: the thrust bearing (8) adopts a thrust ball bearing.
5. The tube sheet and fin tube end weld removal tool for a threaded tube box of claim 1, wherein: the inner positioning sleeve (2) is in axial clearance fit with the rear half part of the cutter bar (1), and the outer positioning sleeve (3) is in axial clearance fit with the inner positioning sleeve (2).
6. A tube sheet and finned tube end weld removal tool for a screwed tube box according to any one of claims 1 to 5, wherein: the front end of the cutter bar (1) is also sleeved with a protective sleeve (6) which is positioned between the head of the cutter bar (1) and the cutter head (5).
7. The tube sheet and fin tube end weld removal tool for a threaded tube box of claim 6, wherein: the inner positioning sleeve (2) has various lengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220246196.2U CN216706451U (en) | 2022-01-30 | 2022-01-30 | Pipe plate and finned tube end weld joint removing tool for pipe plug type pipe box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220246196.2U CN216706451U (en) | 2022-01-30 | 2022-01-30 | Pipe plate and finned tube end weld joint removing tool for pipe plug type pipe box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216706451U true CN216706451U (en) | 2022-06-10 |
Family
ID=81873961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220246196.2U Active CN216706451U (en) | 2022-01-30 | 2022-01-30 | Pipe plate and finned tube end weld joint removing tool for pipe plug type pipe box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216706451U (en) |
-
2022
- 2022-01-30 CN CN202220246196.2U patent/CN216706451U/en active Active
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