Cooling device for welding tantalum-tungsten alloy tube plate and heat exchange tube

Abstract

The utility model discloses a cooling device for welding a tantalum tungsten alloy tube plate and a heat exchange tube, which comprises a pinch plate, and the pinch plate comprises a peripheral surface cooling part and an end surface cooling part; the circumferential surface cooling part and the end surface cooling part are both of an annular structure, a circumferential surface cooling water pipe extending in the circumferential direction is arranged in the circumferential surface cooling part, and first penetrating-out holes allowing the two ends of the circumferential surface cooling water pipe to penetrate out are formed in the radial outer side face of the circumferential surface cooling part; an end face cooling water pipe extending in the circumferential direction is arranged in the end face cooling part, and second penetrating-out holes allowing the two ends of the end face cooling water pipe to penetrate out are formed in the axial end face, back on to the circumferential face cooling part, of the end face cooling part. Before the tube plate and the heat exchange tube are welded, the cooling device is assembled outside the tube plate, and when the tube plate and the heat exchange tube are welded, cooling water is injected into the peripheral surface cooling water tube and the end surface cooling water tube and circularly flows, so that a welding area is cooled, the cooling effect is better than that of a cooling fin, and the welding efficiency is improved through continuous welding.

Description

Technical Field

[0001] The utility model belongs to the technical field of tube sheet structure welding auxiliary equipment, and particularly relates to a cooling device for welding a tantalum-tungsten alloy tube sheet and a heat exchange tube. Background Art

[0002] Tantalum-tungsten alloy is expensive, so when used in heat exchanger tubesheets, a layer of tantalum-tungsten alloy is typically used as the surface layer of the tubesheet, while the base layer is made of carbon steel. Because the melting point of tantalum-tungsten alloy is higher than that of carbon steel, the tubesheet must be cooled when welding the surface layer to the heat exchange tubes to prevent the base layer from deforming due to the high welding temperature, which could affect the overall flatness of the tubesheet.

[0003] Currently, cooling the tube sheet during welding typically involves installing heat sinks on the back of the tube sheet weld area to distribute heat, or employing intermittent welding. However, heat sinks provide poor active heat dissipation, while intermittent welding results in low welding efficiency, failing to meet welding requirements. Utility Model Content

[0004] In order to solve the problem of poor cooling effect of the tube sheet during welding of the existing tube sheet and the heat exchange tube, the utility model provides a cooling device for welding the tantalum-tungsten alloy tube sheet and the heat exchange tube.

[0005] A cooling device for welding a tantalum-tungsten alloy tube sheet to a heat exchange tube, comprising a gusset plate, wherein the gusset plate includes a circumferential surface cooling portion for cooling the circumferential side surface of the tube sheet and an end surface cooling portion for cooling the welded back surface of the tube sheet;

[0006] The peripheral surface cooling portion and the end surface cooling portion are both annular in structure, and the end surface cooling portion is fixedly connected to one axial end of the peripheral surface cooling portion;

[0007] A circumferential cooling water pipe extending in the circumferential direction is provided in the circumferential cooling portion, and a first outlet hole for the two ends of the circumferential cooling water pipe to pass through is provided on the radial outer surface of the circumferential cooling portion;

[0008] An end surface cooling water pipe extending in the circumferential direction is provided in the end surface cooling portion, and a second outlet hole for the two ends of the end surface cooling water pipe to pass through is provided on the axial end surface of the end surface cooling portion facing away from the circumferential surface cooling portion.

[0009] Preferably, the gusset plate comprises a plurality of separate components that can be combined into an annular structure;

[0010] The split assembly includes a circumferential surface split portion, one axial end of the circumferential surface split portion is fixedly connected to the end surface split portion, the circumferential surface split portions in all the split assemblies are combined to form a complete circumferential surface cooling portion, and the end surface split portions in all the split assemblies are combined to form a complete end surface cooling portion;

[0011] One end of the circumferential surface split part is provided with a groove, and the other end is provided with a boss extending along the circumferential direction. The groove on the circumferential surface split part is plug-fitted with the boss on the adjacent circumferential surface split part.

[0012] Preferably, both ends of the circumferential surface split parts are provided with hanging ears, and fastening bolts are provided on the corresponding hanging ears on the plug-in mating ends of adjacent circumferential surface split parts.

[0013] Preferably, a circumferential cooling water pipe groove is provided in the circumferentially extending portion for accommodating a circumferential cooling water pipe.

[0014] An end face cooling water pipe groove is provided in the end face split portion and is circumferentially penetrated and used to accommodate an end face cooling water pipe.

[0015] Preferably, the circumferential surface split portion includes a first circumferential surface portion and a second circumferential surface portion that are fixedly connected;

[0016] The first peripheral portion is located radially outward, and a first peripheral cooling water pipe groove is provided on the radially inner side surface of the first peripheral portion along the circumferential direction;

[0017] The second circumferential portion is located radially inward, and a second circumferential cooling water pipe groove is provided on the radially outer surface of the second circumferential portion along the circumferential direction;

[0018] The corresponding first circumferential cooling water pipe groove and the second circumferential cooling water pipe groove are combined to form a circumferential cooling water pipe groove for accommodating the circumferential cooling water pipe.

[0019] Preferably, the grooves and bosses are arranged on the first peripheral surface portion.

[0020] Preferably, adjacent ends of two adjacent first peripheral surface portions are each provided with a first outlet hole for the peripheral surface cooling water pipe to pass through;

[0021] The first through hole passes through to the corresponding first peripheral cooling water pipe groove.

[0022] Preferably, the end face split portion includes a first end face portion and a second end face portion that are fixedly connected;

[0023] A first end surface cooling water pipe groove is provided along the circumferential direction on the end surface of the first end surface portion facing the circumferential surface split portion;

[0024] The second end surface portion is located between the first end surface portion and the circumferential surface split portion, and a second end surface cooling water pipe groove is provided on the end surface of the second end surface portion facing the first end surface portion along the circumferential direction;

[0025] The corresponding first end surface cooling water pipe groove and the second end surface cooling water pipe groove are combined to form an end surface cooling water pipe groove for accommodating the end surface cooling water pipe.

[0026] Preferably, adjacent ends of two adjacent first end face portions are each provided with a second outlet hole for the end face cooling water pipe to pass through;

[0027] The second through hole passes through to the corresponding first end surface cooling water pipe groove.

[0028] Preferably, the inner walls of the peripheral cooling water pipe and the end cooling water pipe are covered with a layer of copper plate.

[0029] The beneficial effects of the utility model are:

[0030] (1) Before welding the tube sheet to the heat exchange tube, the cooling device of the present invention is installed on the outside of the tube sheet, wherein the radial inner wall surface of the second peripheral surface portion is in contact with the circumferential side surface of the tube sheet, and the axial end surface of the second end surface portion is in contact with the welded back surface of the tube sheet. When welding the tube sheet to the heat exchange tube, cooling water is injected into the peripheral cooling water pipe and the end cooling water pipe and circulated, thereby cooling the welding area, and the cooling effect is better than that of the heat sink. At the same time, the use of the cooling device of the present application avoids the intermittent welding method between the tube sheet and the heat exchange tube, and improves the welding efficiency through continuous welding.

[0031] (2) The split setting of the gusset plate in the present invention reduces the overall processing difficulty and assembly difficulty, and facilitates subsequent maintenance.

[0032] (3) The inner walls of the peripheral cooling water pipe and the end cooling water pipe of the utility model are covered with a layer of copper plate. Copper has excellent thermal conductivity and can quickly absorb and transfer heat, thereby improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0034] Figure 1 This is a schematic structural perspective diagram of a cooling device for welding a tantalum-tungsten alloy tube sheet and a heat exchange tube according to the present invention;

[0035] Figure 2 This is a schematic top view of the structure of the cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes of the utility model;

[0036] Figure 3 yes Figure 2 AA sectional view;

[0037] Figure 4 This is a schematic diagram of the combined structure of the first peripheral surface and the first end surface in the utility model;

[0038] Figure 5This is a schematic structural diagram of the second end portion of the present invention;

[0039] in:

[0040] 1- circumferential surface cooling water pipe, 2- first outlet hole, 3- end surface cooling water pipe, 4- second outlet hole, 5- circumferential surface split portion, 51- first circumferential surface portion, 52- second circumferential surface portion, 53- first circumferential surface cooling water pipe groove, 54- second circumferential surface cooling water pipe groove, 55- groove, 56- boss, 57- hanging ear, 6- end surface split portion, 61- first end surface portion, 62- second end surface portion, 63- first end surface cooling water pipe groove, 64- second end surface cooling water pipe groove, 7- fastening bolt. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] See attached Figure 1-Figure 5 A cooling device for welding a tantalum-tungsten alloy tube sheet to a heat exchange tube comprises a gusset plate, the gusset plate comprising a circumferential surface cooling portion for cooling the circumferential side surface of the tube sheet and an end surface cooling portion for cooling the welded back surface of the tube sheet;

[0043] The peripheral surface cooling portion and the end surface cooling portion are both annular in structure, and the end surface cooling portion is fixedly connected to one axial end of the peripheral surface cooling portion;

[0044] A circumferential cooling water pipe 1 is provided in the circumferential cooling portion and extends in the circumferential direction, and can surround the circumferential side of the tube plate. A first outlet hole 2 is provided on the radial outer surface of the circumferential cooling portion for the two ends of the circumferential cooling water pipe 1 to pass through.

[0045] An end surface cooling water pipe 3 extending in the circumferential direction is provided in the end surface cooling portion, and a second outlet hole 4 for the two ends of the end surface cooling water pipe 3 to pass through is provided on the axial end surface of the end surface cooling portion facing away from the circumferential surface cooling portion.

[0046] The ends of the peripheral cooling water pipe 1 and the end cooling water pipe 3 can be connected to the same cooling water supply system or to their own cooling water supply systems. The cooling water supply system is a prior art and its specific composition will not be described in detail here.

[0047] In addition, in the present application, a number of circumferential cooling water pipes 1 are axially arranged in the circumferential cooling part, and a number of end surface cooling water pipes 3 are radially arranged in the end surface cooling part, so that the number of cooling water pipes injected with cooling water can be increased or decreased according to the actual heat dissipation requirements, thereby improving the scope of application.

[0048] The gusset plate includes a plurality of split components that can be combined into a ring structure; specifically, the gusset plate includes at least two split components, and the drawings of this application show a structure including two split components;

[0049] The split assembly includes a peripheral surface split portion 5, one axial end of the peripheral surface split portion 5 is fixedly connected to the end surface split portion 6, and the peripheral surface split portions 5 in all the split assemblies are combined to form a complete peripheral surface cooling portion, and the end surface split portions 6 in all the split assemblies are combined to form a complete end surface cooling portion;

[0050] One end of the circumferential surface split part 5 is provided with a groove 55 , and the other end is provided with a boss 56 extending along the circumferential direction. The groove 55 on the circumferential surface split part 5 is plug-fitted with the boss 56 on the adjacent circumferential surface split part 5 .

[0051] Specifically, adjacent end surface split portions 6 are arranged to be in contact with each other.

[0052] Both ends of the circumferential surface split portion 5 are provided with hanging ears 57 , and the fastening bolts 7 are provided on the corresponding hanging ears 57 on the plug-in mating ends of the adjacent circumferential surface split portions 5 .

[0053] A circumferential cooling water pipe groove is provided in the circumferential surface split portion 5 and is used to accommodate the circumferential surface cooling water pipe 1.

[0054] An end face cooling water pipe groove is provided in the end face split portion 6 and passes through in the circumferential direction to accommodate the end face cooling water pipe 3 .

[0055] The peripheral surface split portion 5 includes a first peripheral surface portion 51 and a second peripheral surface portion 52 that are fixedly connected; specifically, the first peripheral surface portion 51 and the second peripheral surface portion 52 are fixedly connected by screws;

[0056] The first circumferential portion 51 is located radially outward, and a first circumferential cooling water pipe groove 53 is provided on the radial inner side of the first circumferential portion 51 along the circumferential direction; the radial cross section of the first circumferential cooling water pipe groove 52 is a rectangular structure;

[0057] The second circumferential portion 52 is located radially inward, and a second circumferential cooling water pipe groove 54 is provided on the radially outer surface of the second circumferential portion 52 along the circumferential direction; the radial cross section of the second circumferential cooling water pipe groove 54 is a semicircular structure;

[0058] The corresponding first circumferential cooling water pipe groove 53 and the second circumferential cooling water pipe groove 54 are combined to form a circumferential cooling water pipe groove for accommodating the circumferential cooling water pipe 1 .

[0059] The groove 55 and the boss 56 are provided on the first peripheral surface portion 51 .

[0060] The adjacent ends of two adjacent first peripheral surface parts 51 are each provided with a first outlet hole 2 for the peripheral surface cooling water pipe 1 to pass through;

[0061] The first through hole 2 passes through to the corresponding first circumferential cooling water pipe groove 53 .

[0062] The end face split portion 6 includes a first end face portion 61 and a second end face portion 62 that are fixedly connected. Specifically, the first end face portion 61 and the second end face portion 62 are fixedly connected by screws. The first end face portion 61 is fixedly connected to one axial end of the first peripheral face portion 62.

[0063] A first end surface cooling water pipe groove 63 is provided on the end surface of the first end surface portion 61 facing the circumferential surface split portion 5 along the circumferential direction. The radial cross section of the first end surface cooling water pipe groove 63 is a semicircular structure.

[0064] The second end surface portion 62 is located between the first end surface portion 61 and the circumferential surface split portion 5. A second end surface cooling water pipe groove 64 is provided along the circumferential direction on the end surface of the second end surface portion 62 facing the first end surface portion 61. The radial cross section of the second end surface cooling water pipe groove 64 is a semicircular structure.

[0065] The corresponding first end surface cooling water pipe groove 63 and the second end surface cooling water pipe groove 64 are combined to form an end surface cooling water pipe groove for accommodating the end surface cooling water pipe 3 .

[0066] The adjacent ends of two adjacent first end surface portions 61 are each provided with a second outlet hole 4 for the end surface cooling water pipe 3 to pass through, and the first end surface portion 61 adjacent to the first end surface portion 61 is provided with a second outlet hole 4 for the end surface cooling water pipe 3 to pass through;

[0067] The second through hole 4 passes through to the corresponding first end surface cooling water pipe groove 63 .

[0068] A layer of copper plate is covered on the inner wall of the peripheral cooling water pipe 1 and the end cooling water pipe 3. Copper has excellent thermal conductivity and can quickly absorb and transfer heat, improving the cooling effect.

[0069] In the present application, the peripheral surface split portion 5 and the end surface split portion 6 are both made of aluminum. Aluminum is used as the manufacturing material. Aluminum is light in weight and has excellent heat dissipation performance, which helps to reduce the overall weight while ensuring a good cooling effect.

[0070] A cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes, the specific implementation of which is as follows:

[0071] Before welding the tube sheet to the heat exchange tubes, the cooling device of this application is installed on the outside of the tube sheet. The radial inner wall of the second circumferential surface 52 abuts the circumferential side of the tube sheet, and the axial end surface of the second end surface 62 abuts the welded back surface of the tube sheet. During welding of the tube sheet to the heat exchange tubes, cooling water is injected into the circumferential cooling water pipe 1 and the end cooling water pipe 3 and circulated, thereby cooling the welded area with a cooling effect superior to that of a heat sink. Furthermore, the use of this cooling device avoids intermittent welding between the tube sheet and the heat exchange tubes, improving welding efficiency through continuous welding.

[0072] Although the above describes the specific implementation methods of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes, characterized in that: The gusset plate includes a circumferential surface cooling portion for cooling the circumferential side surface of the tube plate and an end surface cooling portion for cooling the welded back surface of the tube plate; The peripheral surface cooling portion and the end surface cooling portion are both annular in structure, and the end surface cooling portion is fixedly connected to one axial end of the peripheral surface cooling portion; A circumferential cooling water pipe (1) extending in the circumferential direction is provided in the circumferential cooling portion, and a first outlet hole (2) for the two ends of the circumferential cooling water pipe (1) to pass through is provided on the radial outer surface of the circumferential cooling portion; An end surface cooling water pipe (3) extending in the circumferential direction is provided in the end surface cooling portion, and a second outlet hole (4) for the two ends of the end surface cooling water pipe (3) to pass through is provided on the axial end surface of the end surface cooling portion facing away from the circumferential surface cooling portion.

2. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 1, characterized in that: The gusset plate includes a plurality of split components that can be combined into an annular structure; The split assembly comprises a circumferential surface split portion (5), one axial end of the circumferential surface split portion (5) is fixedly connected to an end surface split portion (6), the circumferential surface split portions (5) in all the split assemblies are combined to form a complete circumferential surface cooling portion, and the end surface split portions (6) in all the split assemblies are combined to form a complete end surface cooling portion; One end of the circumferential surface split portion (5) is provided with a groove (55), and the other end is provided with a boss (56) extending in the circumferential direction, and the groove (55) on the circumferential surface split portion (5) and the boss (56) on the adjacent circumferential surface split portion (5) are plug-fitted.

3. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 2, characterized in that: Both ends of the circumferential surface split portion (5) are provided with hanging ears (57), and fastening bolts (7) are provided on the corresponding hanging ears (57) on the plug-fitting ends of adjacent circumferential surface split portions (5).

4. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 2, characterized in that: The circumferential surface split portion (5) is provided with a circumferential surface cooling water pipe groove which is circumferentially penetrated and used to accommodate the circumferential surface cooling water pipe (1); An end face cooling water pipe groove is provided in the end face split portion (6) and is circumferentially penetrated for accommodating the end face cooling water pipe (3).

5. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 4, characterized in that: The circumferential surface split portion (5) comprises a first circumferential surface portion (51) and a second circumferential surface portion (52) that are fixedly connected; The first circumferential surface portion (51) is located radially outward, and a first circumferential surface cooling water pipe groove (53) is provided on the radially inner side surface of the first circumferential surface portion (51) along the circumferential direction; The second circumferential surface portion (52) is located radially inward, and a second circumferential surface cooling water pipe groove (54) is provided on the radially outer surface of the second circumferential surface portion (52) along the circumferential direction; The corresponding first circumferential cooling water pipe groove (53) and the second circumferential cooling water pipe groove (54) are combined to form a circumferential cooling water pipe groove for accommodating the circumferential cooling water pipe (1).

6. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 5, characterized in that: The groove (55) and the boss (56) are arranged on the first peripheral surface (51).

7. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 5, characterized in that: A first outlet hole (2) for the peripheral surface cooling water pipe (1) to pass through is respectively provided on adjacent ends of two adjacent first peripheral surface parts (51); The first through hole (2) passes through to the corresponding first peripheral cooling water pipe groove (53).

8. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 4, characterized in that: The end face split portion (6) comprises a first end face portion (61) and a second end face portion (62) that are fixedly connected; A first end surface cooling water pipe groove (63) is provided on the end surface of the first end surface portion (61) facing the circumferential surface split portion (5) along the circumferential direction; The second end surface portion (62) is located between the first end surface portion (61) and the circumferential surface split portion (5), and a second end surface cooling water pipe groove (64) is provided on the end surface of the second end surface portion (62) facing the first end surface portion (61) along the circumferential direction; The corresponding first end surface cooling water pipe groove (63) and the second end surface cooling water pipe groove (64) are combined to form an end surface cooling water pipe groove for accommodating the end surface cooling water pipe (3).

9. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 8, characterized in that: The adjacent ends of two adjacent first end face portions (61) are each provided with a second outlet hole (4) for the end face cooling water pipe (3) to pass through; The second through hole (4) passes through to the corresponding first end surface cooling water pipe groove (63).

10. The cooling device for welding tantalum-tungsten alloy tube sheets and heat exchange tubes according to claim 1, characterized in that: The inner walls of the peripheral cooling water pipe (1) and the end cooling water pipe (3) are covered with a layer of copper plate.

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