Finned tube head weld joint maintenance device for air cooler tube bundle box

Abstract

The utility model relates to the technical field of heat exchange equipment maintenance, and discloses a finned tube head welding seam maintenance device for an air cooler tube bundle box. The device is composed of a cylindrical head screw, a gasket, a positioning sleeve, a positioning mandrel, a cutter bar, a guide positioning ring, a guide threaded sleeve, a threaded sleeve external thread, a limiting ring, a bearing, a positioning screw, a locking sleeve, an alloy blade, a cutter holder and a screwed plug hole. The cutter bar penetrates through the air cooler tube bundle to the tube head at the other end through the screwed plug hole, the positioning end of the cutter bar is inserted into the tube head hole at the other end, and the hard alloy blade corresponds to the welding seam position of the tube head of the air cooler tube bundle; the middle part of the cutter bar is provided with a guide screw sleeve for positioning and guiding a screwed plug hole; the tail part of the cutter bar is driven by a magnetic drill to operate; the cutter bar drives the hard alloy blade to spot and cut a welding seam in the air cooler tube bundle and the tube head; welding ring protrusions or flaws at the welding seam position between the tube bundle and the tube head can be removed, it is guaranteed that the welding seam of the tube head is smooth, and the service life of the air cooler tube bundle is prolonged.

Description

Technical Field

[0001] This utility model relates to equipment for repairing weld seams in air cooler tube bundle boxes, and in particular to a device for repairing weld seams at the ends of finned tubes in air cooler tube bundle boxes. Background Technology

[0002] Air cooler tube bundles are used in various industries such as petroleum, chemical, and metallurgy. During operation, they operate under high temperature, high pressure, and highly corrosive media conditions. The tube head welds of these bundles experience complex operating conditions and severe corrosion. During manufacturing, weld ring protrusions or defects may exist at the tube bundle and tube head welds. Over long-term operation, these protrusions or defects obstruct the normal flow of the medium within the tube bundle, and the inner side of the weld ring is susceptible to corrosion. The corroded areas gradually weaken under the scouring of high temperature and high pressure media. Once leakage occurs at the weld between the tube head and the heat exchange tube, it directly affects the safe operation of the equipment, resulting in long downtime, high costs, and significant losses. It also affects the quality of the weld between the air cooler tube bundle and the tube head, greatly impacting the service life of the tube bundle. In view of these reasons, a repair device for the finned tube head welds of air cooler tube bundle boxes is proposed. Utility Model Content

[0003] The purpose of this invention is to overcome the problems encountered during the manufacturing process of tube bundles, such as protruding weld rings or defects at the weld seams between the tube bundle and the tube ends. These defects are easily corroded and gradually weaken during operation, leading to leaks that directly affect the safe operation of the equipment and significantly impact the service life of the tube bundle due to the poor weld quality at the tube ends. This invention provides a repair device for the weld seams at the tube ends of finned tubes in air cooler tube bundles through a rational design. The device features a tool holder equipped with a carbide blade, which passes through a plug hole into the air cooler tube bundle to the tube end at the other end. The positioning end of the rod is inserted into the tube head hole at the other end, and the carbide blade corresponds to the weld position of the tube head of the air cooler tube bundle; the middle of the rod has a guide screw sleeve and a plug hole for positioning and guidance, and the tail of the rod is driven by a magnetic drill; the rod drives the carbide blade to countersink the weld in the air cooler tube bundle and tube head; it can remove weld ring protrusions or defects in the weld area of ​​the tube bundle and tube head, ensuring that the tube head weld is smooth. During production, it ensures the normal flow of the medium in the tube bundle without obstruction, reduces weld corrosion and leakage, and improves the service life of the air cooler tube bundle.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: A device for repairing the weld seam of finned tube heads in an air cooler tube bundle box comprises: a cylindrical head screw, a washer, a positioning sleeve, a positioning mandrel, a tool bar, a guide positioning ring, a guide screw sleeve, an external thread on the screw sleeve, a limiting ring, a bearing, a positioning screw, a locking sleeve, an alloy blade, a tool holder, and a plug hole; one end of the tool bar is configured as a transmission end, and the center of the other end of the tool bar is configured with a positioning mandrel. An alloy blade is configured on the outer side of the tool bar end, and a tool holder is configured between the tool bar and the alloy blade; the alloy blade is used to countersink and remove the weld marks from the weld seam between the air cooler tube bundle and the tube head; a guide positioning ring is configured in the middle of the tool bar, and a guide screw sleeve and a locking sleeve are sequentially fitted on the transmission end on the outer side of the tool bar. A guide screw sleeve is configured between the locking sleeve and the guide positioning ring, and a screw hole is reserved on one side of the locking sleeve, in which a positioning screw is configured; the positioning screw is used to fix the locking sleeve and the tool bar, the locking sleeve is used to lock one end of the guide screw sleeve, and the guide screw sleeve is used to guide the movement of the middle part of the tool bar.

[0005] The guide sleeve has an external thread at one end and a limiting ring at the other end; a bearing seat is reserved in the center of the limiting ring, and a bearing is installed in the bearing seat; the external thread of the guide sleeve is used to connect the guide sleeve to the plug hole of the air cooler tube bundle.

[0006] One end of the positioning mandrel is screwed to the tool bar, and a positioning sleeve is set on the outer side of the other end; a finned tube heat exchange tube is provided on the outer side of the positioning sleeve; a screw hole is reserved in the center of the positioning mandrel, a cylindrical head screw is set in the screw hole, and a washer is set between the nut of the cylindrical head screw and the end of the positioning mandrel; the positioning sleeve and the positioning mandrel constitute the positioning end, which is used for positioning the other end of the tool bar, and the positioning end corresponds to the tube head hole of the air cooler tube bundle.

[0007] Beneficial effects: The tool holder of this utility model is equipped with a carbide blade. The tool holder passes through the plug hole into the air cooler tube bundle to the tube head at the other end. The positioning end of the tool holder is inserted into the tube head hole at the other end. The carbide blade corresponds to the weld position of the tube head of the air cooler tube bundle. The middle part of the tool holder has a guide screw sleeve and a plug hole for positioning and guidance. The tail of the tool holder is driven by a magnetic drill. The tool holder drives the carbide blade to countersink the weld seam inside the air cooler tube bundle and tube head. It can remove the weld ring protrusion or defects in the weld seam of the tube bundle and tube head, ensuring a smooth weld seam at the tube head. During production, it ensures the normal and unobstructed flow of the medium in the tube bundle, reduces weld corrosion and leakage, and improves the service life of the air cooler tube bundle.

[0008] This device is simple to manufacture, easy to use, saves time and labor, and can countersink the weld seam at the tube head, making tube head weld seam repair convenient, ensuring product quality, and suitable for the repair of weld seams at the tube heads of various specifications of heat exchange tubes. It is suitable for widespread application.

[0009] It should be noted that the above are preferred examples of this utility model and are not intended to limit the technical scope of this utility model; those skilled in the art can make various corresponding changes and modifications based on the technical solution of this utility model, and all equivalent substitutions or improvements that do not depart from the technical scope of this utility model should be included within the protection scope of this utility model. For example, the middle part of the tool bar has a guide screw sleeve and a plug hole for positioning and guidance, and the tail of the tool bar is driven by a magnetic drill; the tool bar drives the carbide cutting tool to countersink the weld seam inside the air cooler tube bundle and tube head. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 This is a schematic diagram of the overall assembly structure;

[0012] Figure 2 yes Figure 1 A schematic diagram of a partial structure of the tool holder;

[0013] Figure 3 yes Figure 1 A schematic diagram of a partial structure of the guide screw sleeve;

[0014] Figure 4 yes Figure 2 A schematic diagram of a partial structure of an alloy cutting tool;

[0015] Figure 1 , 2 1. Cylindrical head screw 2. Washer 3. Positioning sleeve 4. Positioning mandrel 5. Tool bar 5. Guide positioning ring 5-1. Guide screw sleeve 6. Screw sleeve external thread 6-1. Limiting ring 6-2. Bearing 7. Positioning screw 8. Locking sleeve 9. Carbide cutting tool 10. Tool holder 10-1. Plug hole 11. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] One end of the tool holder 5 is set as the transmission end, and the center of the other end of the tool holder 5 is set with a positioning mandrel 4. An alloy blade 10 is set on the outer side of the tool holder 5, and a tool holder 10-1 is set between the tool holder 5 and the alloy blade 10. The alloy blade 10 is used to countersink and remove the weld marks of the air cooler tube bundle and tube head weld. A guide positioning ring 5-1 is set in the middle of the tool holder 5. A guide screw sleeve 6 and a locking sleeve 9 are sequentially fitted on the transmission end of the outer side of the tool holder 5. A guide screw sleeve 6 is set between the locking sleeve 9 and the guide positioning ring 5-1. A screw hole is reserved on one side of the locking sleeve 9, and a positioning screw 8 is set in the screw hole. The positioning screw 8 is used to fix the locking sleeve 9 and the tool holder 5. The locking sleeve 9 is used to lock one end of the guide screw sleeve 6. The guide screw sleeve 6 is used to guide the running of the middle part of the tool holder 5.

[0018] One end of the guide screw sleeve 6 is provided with an external thread 6-1, and the other end is provided with a limiting ring 6-2; a bearing seat is reserved in the center of the limiting ring 6-2, and a bearing 7 is installed in the bearing seat; the external thread 6-1 is used to connect the guide screw sleeve 6 with the air cooler tube bundle wire plug hole 11.

[0019] One end of the positioning mandrel 4 is screwed to the tool bar 5, and the other end is provided with a positioning sleeve 3 on the outside; a finned tube heat exchange tube is provided on the outside of the positioning sleeve 3; a screw hole is reserved in the center of the positioning mandrel 4, and a cylindrical head screw 1 is provided in the screw hole. A washer 2 is provided between the nut of the cylindrical head screw 1 and the end of the positioning mandrel 4; the positioning sleeve 3 and the positioning mandrel 4 constitute the positioning end, which is used for positioning the other end of the tool bar 5, and the positioning end corresponds to the tube head hole of the air cooler tube bundle.

Claims

1. A finned tube tube head weld repair device for air cooler tube bundle tube box, which is composed of a cylindrical head screw (1), a gasket (2), a positioning sleeve (3), a positioning mandrel (4), a cutter bar (5), a guide positioning ring (5-1), a guide screw sleeve (6), a screw sleeve outer thread (6-1), a limiting ring (6-2), a bearing (7), a positioning screw (8), a locking sleeve (9), an alloy blade (10), a cutter seat (10-1), and a plug hole (11); characterized in that: The tool bar (5) is provided with a transmission end at one end, a positioning mandrel (4) is provided at the center of the other end of the tool bar (5), an alloy blade (10) is provided outside the end of the tool bar (5), and a tool seat (10-1) is provided between the tool bar (5) and the alloy blade (10); the alloy blade (10) is used for tapping and removing the weld marks of the weld seams between the air cooler tube bundle and the tube head; a guide positioning ring (5-1) is provided in the middle of the tool bar (5), a guide screw sleeve (6) and a locking sleeve (9) are sequentially sleeved on the transmission end outside the tool bar (5), the guide screw sleeve (6) is provided between the locking sleeve (9) and the guide positioning ring (5-1), a screw hole is reserved on one side of the locking sleeve (9), and a positioning screw (8) is provided in the screw hole; the positioning screw (8) is used for fixing the locking sleeve (9) and the tool bar (5), the locking sleeve (9) is used for locking one end of the guide screw sleeve (6), and the guide screw sleeve (6) is used for running guidance of the middle part of the tool bar (5).

2. A device for repairing finned tube tube sheet welds of air cooler tube bundle tube sheets according to claim 1, characterized in that: One end of the guide screw sleeve (6) is provided with a screw sleeve outer thread (6-1), and the other end is provided with a limiting ring (6-2); a bearing seat is reserved at the center of the limiting ring (6-2), and a bearing (7) is provided in the bearing seat; the screw sleeve outer thread (6-1) is used for connecting the guide screw sleeve (6) and the air cooler tube bundle plug hole (11).

3. A device for repairing finned tube tube sheet welds of air cooler tube bundle tube sheets according to claim 1, characterized in that: One end of the positioning mandrel (4) is screwed with the tool bar (5), and the other end is provided with a positioning sleeve (3) outside; the positioning sleeve (3) is provided with finned tube heat exchange pipes outside; a screw hole is reserved at the center of the positioning mandrel (4), a cylinder head screw (1) is provided in the screw hole, a gasket (2) is provided between the screw cap of the cylinder head screw (1) and the end of the positioning mandrel (4); the positioning sleeve (3) and the positioning mandrel (4) constitute a positioning end, the positioning end is used for positioning the other end of the tool bar (5), and the positioning end corresponds to the tube head hole of the air cooler tube bundle.

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