CN219561988U - A welded structure of heat exchanger tube sheet - Google Patents

Abstract

The utility model provides a welding structure of a heat exchanger tube plate, which relates to the technical field of heat exchanger welding and comprises a clamping workbench, a welding workbench, a heat exchange tube fixing mechanism, a tube plate fixing mechanism and a welding mechanism, wherein the square tube plate fixing mechanism on the clamping workbench comprises a first clamping block, a second clamping block and a third clamping block, the first clamping block is arranged at the output end of a first cylinder, an adjusting mechanism is arranged at the top of the second clamping block, a lifting mechanism is arranged above the adjusting mechanism, and the third clamping block is connected to the adjusting mechanism; the heat exchange tube fixing mechanism is arranged, so that the heat exchange tube can be stably fixed, the straight tube part of the heat exchange tube is inserted into the straight tube grooves in the second clamping block and the third clamping block and limited by the cutting in the slot, and the arc tube part of the heat exchange tube is limited by the round groove and the round rod on the first clamping block, so that the heat exchange tube is convenient to insert in one-time accurate alignment with the tube plate fixed on the tube plate fixing mechanism.

Description

A welded structure of heat exchanger tube sheet

technical field

The utility model relates to the technical field of heat exchanger welding, in particular to a welding structure of a heat exchanger tube plate.

Background technique

Heat exchanger, also known as heat exchanger or heat exchange equipment, is a device used to transfer heat from hot fluid to cold fluid to meet the specified process requirements. It is an industrial application of convective heat transfer and heat conduction. Heat exchanger It can be classified in different ways. According to its operation process, it can be divided into three types: partition type, hybrid type, and heat storage type. According to the compactness of its surface, it can be divided into two types: compact type and non-compact type.

When the heat exchange tubes of the heat exchanger and the tube sheets of the heat exchanger are welded, it is necessary to align the heat exchange tubes with the tube sheets before welding. In the prior art, most of the alignment work between the heat exchange tubes and the tube sheets is done manually Operation, manually aligning and inserting is a waste of physical strength, and there is a problem of low alignment efficiency. Manual alignment is prone to failure of one-time accurate alignment, and multiple operations are required to complete alignment. The process consumes a long time, thereby reducing welding efficiency. . Therefore, the utility model proposes a welded structure of a heat exchanger tube sheet to solve the deficiencies in the prior art.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a welded structure of the heat exchanger tube plate. By setting the heat exchange tube fixing mechanism, the heat exchange tube can be stably fixed, and the straight tube part of the heat exchange tube is inserted into the second clamping The straight tube grooves in the first clamping block and the third clamping block are limited by the insertion strips inside the slots, and the arc tube part of the heat exchange tube is limited by the circular groove and round rod on the first clamping block, and the first clamping block The cooperation of the clamping block, the second clamping block and the third clamping block can stably fix the heat exchange tube, thereby facilitating one-time precise alignment and insertion with the tube sheet fixed on the tube sheet fixing mechanism, thereby improving welding efficiency.

In order to achieve the above object, the utility model provides the following technical solutions:

A heat exchanger tube plate welding structure, including a clamping workbench, a welding workbench, a heat exchange tube fixing mechanism, a tube plate fixing mechanism and a welding mechanism, the tube plate fixing mechanism above the clamping workbench, the welding The workbench is set on one side of the clamping workbench close to the tube sheet fixing mechanism, the welding workbench is provided with a welding mechanism, and the clamping workbench on the side of the tube sheet fixing mechanism is provided with a heat exchange tube fixing mechanism, The heat exchange tube fixing mechanism includes a first clamping block, a second clamping block and a third clamping block, a first cylinder is provided on the clamping workbench through an assembly plate, and the output end of the first cylinder is provided There is a first clamping block, an adjustment mechanism is provided on the top of the second clamping block, a lifting mechanism is arranged above the adjustment mechanism, a third clamping block is connected to the adjustment mechanism, and the second clamping block and the third clamping block are provided with straight pipe grooves, the second clamping block and the third clamping block are provided with slots, the slots communicate with the straight pipe grooves, and the slots are plugged with For inserting strips, a groove is provided on the first clamping block, a circular groove is provided on the first clamping block, and a round rod is provided in the circular groove.

A further improvement is that: the tube sheet fixing mechanism includes an upper limit plate, a lower limit plate and a second cylinder, an upper limit plate is installed at the output end of the second cylinder, a lower limit plate is provided below the upper limit plate, and the Both the upper limit plate and the lower limit plate are provided with arc-shaped limit grooves.

A further improvement is that: the chute is symmetrically provided on the clamping workbench, the bottom of the first clamping block is connected to the chute through a slider, and the bottom of the lower limiting plate is slidably connected to the chute.

A further improvement is: the adjustment mechanism includes an adjustment frame, a screw rod, a moving rod and a servo motor, the adjustment frame is installed on the top of the second clamping block, a screw rod is installed on the adjustment frame, and the screw rod passes through Driven by a servo motor, a moving rod is connected to the screw rod, the lower end of the moving rod is connected to the top of the third clamping block, and the upper end of the moving rod is slidably connected to the adjustment frame.

A further improvement is: the lifting mechanism includes a suspension and a third cylinder, a suspension is provided above the adjustment frame, a third cylinder is provided below the suspension, and the lower end of the third cylinder is connected to the top of the adjustment frame, so The top of the second cylinder is slidingly connected with the suspension.

A further improvement is: the welding mechanism includes a mounting base, a position adjustment mechanism and a welding torch, the mounting base is installed with a welding workbench, a fourth cylinder is provided on the mounting base, and the output end of the fourth cylinder is provided with a position adjustment mechanism, and a welding torch is installed on the position adjustment mechanism.

A further improvement is: the position adjustment mechanism includes a base plate, a first electromagnetic guide rail, a second electromagnetic guide rail and a moving plate, the base plate is arranged at the output end of the fourth cylinder, the first electromagnetic guide rail is arranged laterally on the base plate, and the The second electromagnetic guide rail is longitudinally arranged and is slidably connected with the first electromagnetic guide rail, the moving plate is arranged on the second electromagnetic guide rail, and the welding torch is installed on the moving plate.

The beneficial effects of the utility model are: the utility model can realize stable fixing of the heat exchange tube by setting the heat exchange tube fixing mechanism, and the straight tube part of the heat exchange tube is inserted into the straight tube in the second clamping block and the third clamping block The slot is limited by the inserts inside the slot, and the arc tube part of the heat exchange tube is limited by the round groove and round rod on the first clamping block. The first clamping block, the second clamping block and the third clamping block The cooperation of the clamping block can stably fix the heat exchange tube, thereby facilitating one-time precise alignment and insertion with the tube sheet fixed on the tube sheet fixing mechanism, thereby improving the welding efficiency.

Description of drawings

Fig. 1 is a front view schematic diagram of the structure of the utility model;

Fig. 2 is a schematic front view of the working principle of the heat exchange tube fixing mechanism of the present invention;

Fig. 3 is a schematic side view of the working principle of the second clamping block and the third clamping block of the present invention.

Among them: 1. Clamping workbench; 2. Welding workbench; 3. Heat exchange tube fixing mechanism; 301. The first clamping block; 302. The second clamping block; 303. The third clamping block; 304. The first clamping block One cylinder; 305, straight pipe groove; 306, groove; 307, adjustment frame; 308, screw mandrel; 309, moving rod; 3010, servo motor; 3011, slot; , the third cylinder; 3015, circular groove; 3016, round rod; 4, tube plate fixing mechanism; 401, upper limit plate; 402, lower limit plate; 403, second cylinder; 404, arc limit groove; 5, Welding mechanism; 501, mounting seat; 502, welding torch; 503, fourth cylinder; 504, substrate; 505, first electromagnetic guide rail; 506, second electromagnetic guide rail; 507, moving plate; 6, chute.

Detailed ways

In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with the examples. The examples are only used to explain the utility model, and do not constitute a limitation to the protection scope of the utility model.

As shown in Figures 1-3, this embodiment proposes a welding structure for heat exchanger tube sheets, including a clamping workbench 1, a welding workbench 2, a heat exchange tube fixing mechanism 3, a tube sheet fixing mechanism 4 and a welding mechanism 5. The tube plate fixing mechanism 4 above the clamping workbench 1, the welding workbench 2 is set on the side of the clamping workbench 1 close to the tube plate fixing mechanism 4, and the welding workbench 2 is provided with a welding mechanism 5. A heat exchange tube fixing mechanism 3 is provided on the clamping table 1 on one side of the tube sheet fixing mechanism 4, and the heat exchange tube fixing mechanism 3 includes a first clamping block 301, a second clamping block 302 and The third clamping block 303, the clamping workbench 1 is provided with a first cylinder 304 through the assembly plate, the output end of the first cylinder 304 is provided with a first clamping block 301, and the second clamping block 302 An adjustment mechanism is provided on the top, and a lifting mechanism is arranged above the adjustment mechanism. The third clamping block 303 is connected to the adjustment mechanism, and straight pipes are arranged on the second clamping block 302 and the third clamping block 303. Slot 305, the second clamping block 302 and the third clamping block 303 are provided with a slot 3011, the slot 3011 communicates with the straight pipe groove 305, and the insertion strip 3012 is inserted in the slot 3011, The first clamping block 301 is provided with a groove 306 , the first clamping block 301 is provided with a circular groove 3015 , and a circular rod 3016 is provided in the circular groove 3015 .

When using the welding structure of the utility model to weld the heat exchange tube and the tube sheet of the heat exchanger, the tube sheet is fixed on the tube sheet fixing mechanism 4, and then the adjustment mechanism is used to adjust the third clamping block 303 to be close to the second clamping Block 302, at this time, the straight tube grooves 305 of the second clamping block 302 and the third clamping block 303 are aligned and penetrated, and the two straight tube parts of the U-shaped heat exchange tube are inserted into the straight tube grooves 305 at the corresponding positions, and the U-shaped The straight tube part of the heat exchange tube is supported by the insert bar 3012 in the slot 3011. When all the straight tube parts of the U-shaped heat exchange tube enter the straight tube groove 305, the first cylinder 304 is used to control the first clamping The block 301 approaches the second clamping block 302 until the arc tube portion of the U-shaped heat exchange tube enters the groove 306. At this time, the round rod 3016 is inserted into the circular groove 3015 to carry out the arc tube portion of the U-shaped heat exchange tube. The position is limited so that the U-shaped heat exchange tube is fixed inside the first clamping block 301, the second clamping block 302 and the third clamping block 303. At this time, the first clamping block 301, the second clamping block 302 and the third clamping block The three clamping blocks 303 have completed the fixing of the U-shaped heat exchange tubes. If the straight tube portion of the U-shaped heat exchange tubes extends out of the fixing holes on the tube plate fixed on the tube plate fixing mechanism 4, then by adjusting the second The position of the third clamping block 303 on the adjustment mechanism, during the adjustment process, the protrusions provided on the top and bottom of the third clamping block 303 will push the tube sheet to move synchronously until the end of the straight tube part of the U-shaped heat exchange tube is in line with the Align the fixed holes on the tube plate; after the U-shaped heat exchange tubes are aligned, pull out the insertion strip 3012 in the slot 3011, and control the lifting mechanism to rise to drive the second clamping block 302 to rise, and the third clamping block 302 to rise during the rising process The block 303 rises up until the straight pipe part of the U-shaped heat exchange tube is exposed, and then the welding operation can be performed by the welding mechanism 5. After welding, the round rod 3016 can be pulled out and the first cylinder 304 can be reset.

The tube sheet fixing mechanism 4 includes an upper limit plate 401, a lower limit plate 402 and a second cylinder 403, the output end of the second cylinder 403 is equipped with an upper limit plate 401, and a lower limit plate is arranged below the upper limit plate 401 402, the upper limit plate 401 and the lower limit plate 402 are both provided with arc-shaped limit grooves 404 . The clamping workbench 1 is symmetrically provided with chute 6 , the bottom of the first clamping block 301 is connected to the chute 6 through a slider, and the bottom of the lower limiting plate 402 is slidably connected to the chute 6 . When the tube plate fixing mechanism 4 fixes the tube plate, the lower end of the tube plate is placed in the arc-shaped limit groove 404 on the lower limit plate 402, and then the second cylinder 403 is controlled to extend out to drive the upper limit plate 401 to limit and fix the upper end of the tube plate The bottom of the lower limiting plate 402 is slidably connected to the chute 6. This setting can allow the third clamping block 303 to push the upper limiting plate 401 and the lower limiting plate 402 to move synchronously when adjusting the position of the third clamping block 303 on the adjustment mechanism. . The arrangement of the slide block and the chute 6 at the bottom of the first clamping block 301 can make the movement of the first clamping block 301 more stable when the first cylinder 304 operates.

The adjustment mechanism includes an adjustment frame 307, a screw mandrel 308, a moving rod 309 and a servo motor 3010. The adjustment frame 307 is installed on the top of the second clamping block 302, and a screw rod 308 is installed in rotation on the adjustment frame 307. The screw rod 308 is driven by a servo motor 3010 , and a moving rod 309 is connected to the screw rod 308 , the lower end of the moving rod 309 is connected to the top of the third clamping block 303 , and the upper end of the moving rod is slidably connected to the adjusting frame 307 . When the adjustment mechanism adjusts the distance between the third clamping block 303 and the second clamping block 302, the servo motor 3010 starts to drive the screw rod 308 to rotate, thereby making the moving rod 309 move on the screw rod 308 and connect with the moving rod 309 The third clamping block 303 moves position synchronously.

Described lifting mechanism comprises suspension 3013 and the 3rd air cylinder 3014, and described adjustment frame 307 top is provided with suspension 3013, and described suspension 3013 below is provided with the 3rd air cylinder 3014, and described puts the 3rd air cylinder 3014 lower end and adjustment frame 307 The top is connected, and the top of the second cylinder 403 is slidably connected with the suspension 3013 . After the U-shaped heat exchange tube is aligned with the tube plate, the output end of the third cylinder 3014 is controlled to retract, which can drive the adjustment frame 307 to rise, and then drive the second clamping block 302 and the third clamping block 303 to rise, so that the U-shaped heat exchange The straight pipe portion of the heat pipe is exposed from the straight pipe groove 305 .

A further improvement is: the welding mechanism 5 includes a mounting base 501, a position adjustment mechanism and a welding torch 502, the mounting base 501 is installed with the welding workbench 2, a fourth cylinder 503 is provided on the mounting base 501, and the fourth The output end of the cylinder 503 is provided with a position adjustment mechanism, and the welding torch 502 is installed on the position adjustment mechanism. The position adjustment mechanism includes a base plate 504, a first electromagnetic guide rail 505, a second electromagnetic guide rail 506 and a moving plate 507, the base plate 504 is arranged at the output end of the fourth cylinder 503, and the first electromagnetic guide rail 505 is arranged laterally on the base plate 504 Above, the second electromagnetic guide rail 506 is arranged longitudinally and is slidably connected with the first electromagnetic guide rail 505 , the moving plate 507 is arranged on the second electromagnetic guide rail 506 , and the welding torch 502 is installed on the moving plate 507 . The position adjustment mechanism can satisfy the multi-position adjustment of the welding torch 502, so as to meet the requirements of welding in multiple different positions.

The utility model can realize stably fixing the heat exchange tube by setting the heat exchange tube fixing mechanism 3, and the straight tube part of the heat exchange tube is inserted into the straight tube groove 305 in the second clamping block 302 and the third clamping block 303 and is inserted into the straight tube groove 305. The insertion strip 3012 inside the groove 3011 is limited, and the arc tube part of the heat exchange tube is limited by the circular groove 3015 and the round rod 3016 on the first clamping block 301. The first clamping block 301 and the second clamping block 302 Cooperating with the third clamping block 303 can stably fix the heat exchange tube, thereby facilitating one-time precise alignment and insertion with the tube sheet fixed on the tube sheet fixing mechanism 4 , thereby improving welding efficiency.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (7)

1. A heat exchanger tube sheet welding structure, characterized in that it includes a clamping workbench (1), a welding workbench (2), a heat exchange tube fixing mechanism (3), a tube sheet fixing mechanism (4) and The welding mechanism (5), the tube sheet fixing mechanism (4) above the clamping workbench (1), the welding workbench (2) is arranged on the clamping workbench (1) close to the tube sheet fixing mechanism (4) On one side, the welding workbench (2) is provided with a welding mechanism (5), and the clamping workbench (1) on one side of the tube plate fixing mechanism (4) is provided with a heat exchange tube fixing mechanism (3) , the heat exchange tube fixing mechanism (3) includes a first clamping block (301), a second clamping block (302) and a third clamping block (303), and the clamping workbench (1) passes The assembly plate is provided with a first cylinder (304), the output end of the first cylinder (304) is provided with a first clamping block (301), and the top of the second clamping block (302) is provided with an adjustment mechanism. A lifting mechanism is provided above the adjusting mechanism, and a third clamping block (303) is connected to the adjusting mechanism, and straight pipe grooves ( 305), the second clamping block (302) and the third clamping block (303) are provided with a slot (3011), the slot (3011) communicates with the straight pipe groove (305), the insertion The insert (3012) is plugged into the slot (3011), the first clamping block (301) is provided with a groove (306), and the first clamping block (301) is provided with a round groove (3015 ), and a round rod (3016) is arranged in the round groove (3015). 2. A heat exchanger tube sheet welding structure according to claim 1, characterized in that: the tube sheet fixing mechanism (4) includes an upper limit plate (401), a lower limit plate (402) and a second Cylinder (403), the output end of the second cylinder (403) is equipped with an upper limit plate (401), a lower limit plate (402) is provided under the upper limit plate (401), and the upper limit plate (401) Arc-shaped limiting slots (404) are provided on the lower limiting plate (402). 3. A heat exchanger tube plate welding structure according to claim 2, characterized in that: the clamping workbench (1) is symmetrically provided with slide grooves (6), and the first clamping block The bottom of (301) is connected to the chute (6) through a slider, and the bottom of the lower limiting plate (402) is slidably connected to the chute (6). 4. A heat exchanger tube sheet welding structure according to claim 3, characterized in that: the adjustment mechanism includes an adjustment frame (307), a screw (308), a moving rod (309) and a servo motor ( 3010), the adjustment frame (307) is installed on the top of the second clamping block (302), the screw rod (308) is installed on the adjustment frame (307), and the screw rod (308) is driven by the servo motor ( 3010), the screw rod (308) is connected with a moving rod (309), the lower end of the moving rod (309) is connected with the top of the third clamping block (303), the upper end of the moving rod is connected with the adjustment frame (307 ) slide connection. 5. A heat exchanger tube sheet welding structure according to claim 4, characterized in that: the lifting mechanism includes a suspension (3013) and a third cylinder (3014), and the adjustment frame (307) above A suspension (3013) is provided, a third cylinder (3014) is arranged under the suspension (3013), the lower end of the third cylinder (3014) is connected to the top of the adjustment frame (307), and the second cylinder (403) The top is slidingly connected to the suspension (3013). 6. A heat exchanger tube sheet welding structure according to claim 1, characterized in that: the welding mechanism (5) includes a mounting seat (501), a position adjustment mechanism and a welding torch (502), and the mounting The seat (501) is installed with the welding workbench (2). The fourth cylinder (503) is provided on the installation seat (501). The output end of the fourth cylinder (503) is provided with a position adjustment mechanism. The position adjustment A welding torch (502) is installed on the mechanism. 7. A heat exchanger tube plate welding structure according to claim 6, characterized in that: the position adjustment mechanism includes a base plate (504), a first electromagnetic guide rail (505), a second electromagnetic guide rail (506) and a moving plate (507), the base plate (504) is arranged at the output end of the fourth cylinder (503), the first electromagnetic guide rail (505) is arranged laterally on the base plate (504), and the second electromagnetic guide rail (506 ) is longitudinally arranged and slidably connected with the first electromagnetic guide rail (505), the moving plate (507) is arranged on the second electromagnetic guide rail (506), and the welding torch (502) is installed on the moving plate (507).