Tube bundle assembling and welding device

Abstract

In order to solve the problems that the assembly welding quality of heat exchange tubes and elbows is difficult to control, the efficiency is low and the like, the utility model provides a tube bundle assembly welding device which comprises a heat exchange tube assembly positioning tool which is composed of a support and a fixed clamping plate, and the fixed clamping plate is fixedly connected to the upper portion of the support; the elbow assembling tool is composed of a first fixing plate, a second fixing plate, a connecting plate and a positioning plate, a U-shaped channel is formed between the first fixing plate and the second fixing plate in a spaced mode, and the connecting plate is located in the U-shaped channel and fixedly connected to the lower portion between the first fixing plate and the second fixing plate. Grooves used for being matched with the surfaces of heat exchange tube elbows are formed in the fixing clamping plates and the connecting plates, the thickness of the positioning plates is the same as the gap between the heat exchange tubes and the elbows, the requirement for the parallelism of heat exchange tube assembly is met, the quality and efficiency of assembly welding of the heat exchange tubes and the elbows are effectively improved, and the manufacturing quality of tube bundles is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of tube bundle welding, in particular to a tube bundle assembly welding device. Background Art

[0002] The inner tube bundle of the fluidized bed is welded by heat exchange tubes and 180° elbows. The welding size requirements of heat exchange tubes and elbows are relatively high. Because the particle group in the equipment has the properties of fluid during operation, the heat transfer rate and bed temperature uniformity are required to be high. In addition, the corrosion of solid particles makes the tubes easy to wear. This requires that the spacing between two adjacent heat exchange tubes should be uniform during the tube bundle assembly process, and the tube bundle should be vertical after installation to ensure the uniformity of heat exchange of the tube bundle and reduce the wear of the heat exchange tubes during operation.

[0003] The conventional method is used to assemble the heat exchange tubes with the two ends of the 180° elbow and then weld them. Since the heat exchange tubes are long (ranging from 11 to 13 meters), it is not conducive to ensuring the assembly quality of the heat exchange tubes and the elbows after welding. The generated welding stress will cause the tube bundle to deform, and the parallelism of the two heat exchange tubes cannot be guaranteed. Once deformation occurs, it will directly affect the quality and efficiency of the later installation of the tube bundle. In addition, the weight of the tube bundle is large and it is not convenient to flip and transport it. Using the conventional method for assembly and welding, the labor intensity of the operators is high, the work efficiency is low, and the production quality cannot be guaranteed. Utility Model Content

[0004] In order to solve the problems of difficult to control quality and low efficiency of welding of tube bundle heat exchange tubes and elbows, the utility model provides a tube bundle welding device, and the technical solution adopted is as follows:

[0005] A tube bundle welding device, characterized by comprising:

[0006] The heat exchange tube group positioning tool is composed of a bracket and a fixed clamping plate. The fixed clamping plate is fixedly connected to the top of the bracket. The fixed clamping plate is provided with an arc groove that fits the surface of the heat exchange tube. The axes of multiple groups of arc grooves have the same height and are distributed in parallel.

[0007] The elbow assembly tooling is composed of a first fixed plate, a second fixed plate, a connecting plate and a positioning plate. A U-shaped channel is arranged between the first fixed plate and the second fixed plate. The connecting plate is located in the U-shaped channel and is fixedly connected below the first fixed plate and the second fixed plate. A groove is arranged on the connecting plate for cooperating with the surface of the elbow of the heat exchange tube. The thickness of the positioning plate is the same as the gap between the heat exchange tube and the elbow.

[0008] Furthermore, a fixing device for fixing the heat exchange tube is provided between the first fixing plate and the second fixing plate.

[0009] Furthermore, the fixing device comprises a U-shaped bolt, and fixing holes are provided on the first fixing plate and the second fixing plate. The open end of the U-shaped bolt passes through the fixing hole from top to bottom and is fixed by a nut.

[0010] Furthermore, the heat exchange tube group positioning tool also includes a lifting ear, and the lifting ear is fixedly connected to the bracket or the top of the fixed clamping plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. The tube bundle assembly welding operation point is lifted from the ground to above the bracket, which improves the working conditions and reduces the labor intensity of the operators;

[0013] 2. Through the heat exchange tube assembly and positioning tooling, the assembly of the fluidized bed core tube bundle heat exchange tubes can be completed quickly, eliminating the time for repeated measurement and adjustment of the tube spacing, ensuring the spacing and parallelism of the heat exchange tubes, and improving the assembly quality and efficiency of the tube bundle heat exchange tubes;

[0014] 3. Through the elbow assembly tooling, the elbow and heat exchange tube assembly can be completed quickly, which effectively improves the assembly efficiency, and the assembly gap and error deviation can be effectively controlled within the manufacturing process requirements;

[0015] 4. The heat exchange tube is detachably fixed to the first fixing plate and the second fixing plate by U-shaped bolts and nuts, which is convenient for operation and the size of the U-shaped bolts can be adjusted according to the heat exchange tubes with different diameters;

[0016] 5. By setting lifting lugs on the positioning tooling of the heat exchange tube group, it is convenient to lift the overall structure after the heat exchange tube and elbow are assembled;

[0017] 6. The tube bundle welding device can be used to batch weld the tube bundle heat exchange tubes and elbows, ensuring the quality of the tube bundle welding while effectively improving the efficiency of component prefabrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view schematic diagram of the positioning tooling structure of the heat exchange tube group of the utility model

[0019] Figure 2 Left view schematic diagram of the heat exchange tube group positioning tooling

[0020] Figure 3 Schematic diagram of the elbow assembly tooling from top view

[0021] Figure 4 Side view of elbow assembly tooling

[0022] Among them, 1- bracket, 2- fixed card plate, 3- ear, 4- first fixed plate, 5- second fixed plate, 6- connecting plate, 7- elbow, 8- positioning plate, 9- U-bolt, 10- heat exchange tube. DETAILED DESCRIPTION

[0023] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0024] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] The tube bundle welding device comprises a heat exchange tube group positioning tool and an elbow group tool.

[0026] like Figure 1-Figure 2 As shown, the positioning fixture for the heat exchange tube group consists of a bracket 1 and a fixed clamping plate 2. Two groups of fixed clamping plates 2 are provided, which are respectively fixedly connected to the upper left and right ends of the bracket 1. The length of the fixed clamping plate 2 is horizontally distributed along the front-to-back direction. A plurality of groups of arc grooves that fit the outer cylindrical surface of the heat exchange tube 10 are evenly arranged on its upper end surface from front to back, and the axes of the plurality of arc grooves are located at the same height and are distributed in parallel. The two groups of arc grooves correspondingly distributed on the left and right groups of fixed clamping plates 2 are concentrically distributed. The heat exchange tube 10 is supported by the fixed clamping plate 2 to ensure the parallelism between the two heat exchange tubes 10. In addition, a group of lifting ears 3 are respectively welded on the front and rear ends above the fixed clamping plate 2. The lifting ears 3 facilitate the lifting and movement of the heat exchange tube 10 and the elbow 7 after assembly.

[0027] Elbow assembly tooling Figure 3-Figure 4As shown, it is composed of a first fixing plate 4, a second fixing plate 5, a connecting plate 6 and a positioning plate 8. The first fixing plate 4 is located inside the second fixing plate 5, and a U-shaped channel is formed between the two. A plurality of connecting plates 6 are arranged below the U-shaped channel. Both ends of the connecting plates 6 are welded to the first fixing plate 4 and the second fixing plate 5 respectively, and an arc groove is arranged on the upper surface of the connecting plate 6 for fitting with the outer surface of the heat exchange tube 10 and the elbow 7. Two groups of fixing holes corresponding to the positions are arranged on the first fixing plate 4 and the second fixing plate 5 located at the corners of the U-shaped channel, and U-shaped bolts 9 are installed in the fixing holes. When the heat exchange tube 10 is placed on the connecting plate 6, the heat exchange tube 10 is fixed by the U-shaped bolts 9 and nuts. In addition, the elbow assembly tooling also includes a positioning plate 8, which is an L-shaped plate, and its thickness can be selected according to the gap between the elbow 7 and the heat exchange tube 10.

[0028] When the device is used for tube bundle welding, firstly, two groups of heat exchange tubes 10 are placed in the arc groove of the fixed clamping plate 2, and the ends of the two groups of heat exchange tubes 10 should be ensured to be flush. Then, the ends of the two groups of heat exchange tubes 10 are fixed in the U-shaped channel between the first fixed plate 4 and the second fixed plate 5, so that the surface of the heat exchange tube 10 is in contact with the connecting plate 6, and the heat exchange tube 10 is fixed by U-bolts 9 and nuts. Next, the elbow 7 is placed on the connecting plate 6 of the arc portion of the U-shaped channel, and a positioning plate 8 is placed between the elbow 7 and the heat exchange tube 10. The assembly gap between the heat exchange tube 10 and the elbow 7 can be adjusted by the positioning plates 8 of different thicknesses. Finally, the heat exchange tube 10 is fixed by spot welding to the elbow 7, and the elbow assembly tooling is removed and the butt weld is welded. After welding is completed, the whole is hoisted and transferred to the subsequent process.

[0029] The device can quickly complete the assembly of the heat exchange tubes 10 through the heat exchange tube assembly positioning tooling, save the time of repeated measurement and adjustment of the tube spacing, ensure the spacing and parallelism of the heat exchange tubes, and improve the assembly quality and efficiency of the heat exchange tubes in the tube bundle; through the elbow assembly tooling, the elbow and heat exchange tube assembly can be quickly completed, so that the assembly efficiency is increased by more than 2 times, and the assembly gap and error deviation are controlled within 0.5mm to meet the manufacturing process requirements; and the working point is lifted above the bracket 1, which improves the working conditions and reduces the labor intensity of the operators. The device can batch weld heat exchange tubes and elbows, ensure the welding quality, and effectively improve the efficiency of component prefabrication.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A tube bundle welding device, characterized in that: include: The heat exchange tube group positioning tool is composed of a bracket and a fixed clamping plate. The fixed clamping plate is fixedly connected to the upper part of the bracket. The fixed clamping plate is provided with multiple groups of arc grooves that fit the surface of the heat exchange tube. The axes of the multiple groups of arc grooves have the same height and are distributed in parallel. The elbow assembly tooling is composed of a first fixed plate, a second fixed plate, a connecting plate and a positioning plate. A U-shaped channel is arranged between the first fixed plate and the second fixed plate. The connecting plate is located in the U-shaped channel and is fixedly connected below the first fixed plate and the second fixed plate. A groove is arranged on the connecting plate for cooperating with the surface of the elbow of the heat exchange tube. The thickness of the positioning plate is the same as the gap between the heat exchange tube and the elbow.

2. The tube bundle welding device according to claim 1, characterized in that: A fixing device for fixing the heat exchange tube is also arranged between the first fixing plate and the second fixing plate.

3. The tube bundle welding device according to claim 2, characterized in that: The fixing device comprises a U-shaped bolt, and the first fixing plate and the second fixing plate are provided with fixing holes. The open end of the U-shaped bolt passes through the fixing hole from top to bottom and is fixed by a nut.

4. The tube bundle welding device according to claim 1, 2 or 3, characterized in that: The heat exchange tube group positioning tool also includes a lifting ear, and the lifting ear is fixedly connected to the bracket or the top of the fixed clamping plate.

Images