A tube opening expansion device for heat exchange tube

Abstract

The present invention discloses a tube orifice reaming device for a heat exchange tube, and relates to the technical field of heat exchange tube processing, including a processing table body, a first fixing seat is fixedly installed on one side of the top of the processing table body, and a second fixing seat is fixedly installed on one side of the top of the processing table body located at the first fixing seat. The present invention reduces the possibility of cracks or deformation at the tube orifice of the heat exchange tube by designing an expansion head assembly, improves the reaming effect of the heat exchange tube, drives the connecting block and the annular fixing plate to move forward by starting the second electric push rod, drives the annular connecting plate and several groups of moving rods to move synchronously, and drives the rotating rods on each group of moving rods to rotate, thereby driving several groups of arc expansion plates to move outward under the mutual constraint of the T-shaped slider and the slide groove, and expanding the tube orifice of the heat exchange tube to a specified diameter, so that the staff can expand the orifice according to the actual production needs, which greatly improves the practicality of the device.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange tube processing, in particular to a tube opening expansion device for a heat exchange tube. Background Art

[0002] The heat exchange tube is one of the components of the heat exchanger. It is placed inside the cylinder and is used for heat exchange between two media. It has high thermal conductivity and good isothermal properties. It is a device that can quickly transfer heat energy from one point to another with almost no heat loss. Therefore, it is called a heat transfer superconductor. Its thermal conductivity is thousands of times that of copper. When the heat exchange tube is being processed, it is necessary to expand the tube mouth of the heat exchange tube, and expansion equipment will be used.

[0003] The expansion head assembly of traditional expansion equipment can only expand a single heat exchange tube orifice. When it is necessary to expand tube orifices with different inner diameters, the staff needs to replace the conical expansion head, which is time-consuming and labor-intensive in actual production. At the same time, when traditional expansion equipment cools the expansion head assembly, it usually uses cooling water to spray the outer surface of the pipe for cooling. However, the cooling water cannot contact the expansion head assembly and the inner wall of the pipe, and the cooling effect is poor. For this reason, we propose a tube orifice expansion equipment for heat exchange tubes. Summary of the invention

[0004] Based on this, the object of the present invention is to provide a tube opening expansion device for a heat exchange tube to solve the technical problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tube orifice reaming device for a heat exchange tube, comprising a processing table body, a first fixing seat is fixedly installed on one side of the top of the processing table body, a second fixing seat is fixedly installed on the top of the processing table body on one side of the first fixing seat, a first electric push rod is fixedly installed between the first fixing seat and the second fixing seat, a telescopic end of the first electric push rod extends through and extends to the other side of the second fixing seat and is fixedly connected to a fixing plate, a partition is transversely fixedly installed inside the processing table body, a cooling assembly is provided between the fixing plate and the second fixing seat, an expansion head assembly is installed on the side of the fixing plate away from the telescopic end of the first electric push rod, and a spray assembly is provided on the outside of the expansion head assembly;

[0006] The expansion head assembly includes a fixed column fixedly connected to the fixed plate at a side away from the telescopic end of the first electric push rod, the outer wall of the fixed column is provided with a sleeve through a bearing sleeve, one end of the sleeve is fixedly connected to a sleeve, the inner diameter of the sleeve is larger than the diameter of the fixed column, the outer wall of the sleeve is provided with a plurality of groups of movable grooves equidistantly distributed in a circle, and a plurality of groups of movable grooves are slidably connected to movable rods, the upper and lower ends of each group of movable rods are connected to rotating rods through a rotating shaft, and the other ends of the two groups of rotating rods are connected to the same connecting strip through a rotating shaft, and one side of each group of connecting strips is fixedly connected to an arc-shaped expansion plate;

[0007] The cooling assembly includes four groups of first piston cylinders fixedly installed on one side of the second fixing seat close to the fixing plate, the four groups of first piston cylinders are distributed at the four corners of one side of the second fixing seat, and each group of first piston cylinders is slidably connected with a first piston, one side of each group of first pistons is fixedly connected with a first piston rod, the other end of each group of first piston rods passes through the top of the corresponding first piston cylinder and is fixedly connected to one side of the fixing plate, the outer bottom of each group of first piston cylinders is fixedly connected with a first water inlet pipe, and each group of first water inlet pipes passes through and extends to the inside of the processing table body and is fixedly connected to the same water storage tank The water storage tank is fixedly installed on the upper surface of the partition, and one end of the outer bottom of each group of the first piston cylinder away from the first water inlet pipe is fixedly connected to the first water outlet pipe, and the other end of each group of the first water outlet pipe extends through the inner cavity of the fixed plate and is fixedly connected to the same connecting pipe, one end of the connecting pipe is fixedly connected to a water delivery pipe, and the water delivery pipe is arranged in the inner cavity of the fixed column, and the outer wall of the fixed column is fixedly sleeved with a fixed disk, and the outer wall of the other end of the water delivery pipe is fixedly connected to a plurality of groups of branch pipes equidistantly distributed in a circle, each group of the branch pipes is arranged inside the fixed disk, and the other end of each group of branch pipes is fixedly installed with a first nozzle.

[0008] As a preferred technical solution of a tube orifice reaming device for a heat exchange tube of the present invention, the fixed disk is connected to a rotating disk through a bearing on one side close to the sleeve, and a plurality of groups of circumferentially equidistant slide grooves are provided on one side of the rotating disk. One end of each group of arc expansion plates close to the rotating disk is fixedly connected to a special-shaped plate, and the other end of each group of special-shaped plates is fixedly installed with a T-shaped slider matching the slide groove, and each group of T-shaped sliders is slidably connected to the corresponding slide groove.

[0009] As a preferred technical solution of a tube orifice reaming device for a heat exchange tube of the present invention, a second electric push rod is fixedly installed on the bottom of one side of the fixed plate close to the expansion head assembly, the telescopic end of the second electric push rod is fixedly connected to a connecting block, the top of the connecting block is fixedly connected to an annular fixed plate, and several groups of the moving rods are fixedly connected to the same annular connecting plate at one end away from the rotating disk, the annular connecting plate is connected to the annular fixing plate via a bearing, and the inner diameters of the annular connecting plate and the annular fixing plate are both larger than the diameter of the sleeve.

[0010] As a preferred technical solution of a tube orifice reaming device for a heat exchange tube of the present invention, a motor is fixedly installed on the top of one side of the fixed plate close to the expansion head assembly, a first gear is fixedly installed on the output end of the motor, a second gear is meshed at the bottom of the first gear, and the second gear is fixedly sleeved on the outer wall of the sleeve.

[0011] As a preferred technical solution of a tube opening expansion device for a heat exchange tube of the present invention, the special-shaped plate is arranged in an inclined arc shape, and a plurality of groups of the special-shaped plates are gathered to present a cone-like shape.

[0012] As an optimal technical solution of a tube orifice reaming equipment for a heat exchange tube of the present invention, the spray assembly includes a special-shaped connecting rod fixedly installed on the bottom of the fixing plate, a movable groove matching the special-shaped connecting rod is opened on one side of the top of the processing table main body, the other end of the special-shaped connecting rod extends to the inside of the processing table main body and is fixedly connected to a second piston rod, the other end of the second piston rod is fixedly installed with a second piston, the outer side of the second piston is sleeved with a second piston cylinder, the second piston cylinder is fixedly connected to the upper surface of the partition through a base, the bottom end of the second piston cylinder is fixedly connected to a second water inlet pipe, the other end of the second water inlet pipe is fixedly connected to one side of the water storage tank, the outer bottom end of the second piston cylinder is fixedly connected to a second water outlet pipe, the other end of the second water outlet pipe extends to the top of one side of the processing table main body and is fixedly connected with an annular water storage pipe, a plurality of groups of second nozzles equidistantly distributed in a circle are fixedly connected to the inner side of the annular water storage pipe, a support plate is fixedly installed on one side of the processing table main body, and the other end of the support plate is sleeved on the outer side of the second water outlet pipe.

[0013] As a preferred technical solution of a tube opening expansion device for a heat exchange tube of the present invention, a one-way valve is fixedly installed inside one end of the second water inlet pipe, the second water outlet pipe, the first water inlet pipe and the first water outlet pipe.

[0014] As an optimal technical solution of a tube orifice expanding device for a heat exchange tube of the present invention, a fixed block is fixedly installed on the top of the fixed plate, a guide rod is fixedly connected to one side of the fixed block, a guide block is fixedly installed on the top of the first fixed seat, a through hole matching the guide rod is opened on the guide block, and the guide rod passes through the through hole and is slidably connected to the guide block.

[0015] As an optimal technical solution of a tube orifice expansion device for a heat exchange tube of the present invention, a buffer spring is sleeved on the outer wall of each group of the first piston rods, one end of the buffer spring is fixedly connected to one side of the fixed plate, and the other end is fixedly connected to the top of the first piston cylinder.

[0016] In summary, the present invention mainly has the following beneficial effects:

[0017] 1. The present invention reduces the possibility of cracks or deformation at the orifice of the heat exchange tube by designing an expansion head assembly, improves the expansion effect of the heat exchange tube, and drives the connecting block and the annular fixing plate to move forward by starting the second electric push rod, drives the annular connecting plate and a plurality of groups of moving rods to move synchronously, and the plurality of groups of moving rods slide in the moving grooves on the outer wall of the sleeve, drives the rotating rods on each group of moving rods to rotate, thereby driving a plurality of groups of arc expansion plates to move outward under the mutual constraint of the T-shaped slider and the slide groove, and expands the orifice of the heat exchange tube to a specified diameter, so that the staff can expand the orifice according to the actual production needs, which greatly improves the practicality of the device;

[0018] 2. The present invention designs a cooling assembly, utilizes the fixed plate to move forward, drives the first piston rod and the first piston to move toward the top of the first piston cylinder, and at this time, negative pressure is generated in the first piston cylinder, and the water in the water storage tank is pumped out into the first piston cylinder through the first water inlet pipe. When the expansion of the pipe opening of the heat exchange tube is completed, the telescopic end of the first electric push rod drives the fixed plate to move backward, thereby driving the first piston rod and the first piston to move toward the bottom of the first piston cylinder, squeezing the water inside the first piston cylinder, and entering the water delivery pipe through the first water outlet pipe, and then entering several groups of branch pipes and finally being sprayed out by the first nozzle, so as to cool the inner wall of the pipe opening of the heat exchange tube. Compared with the traditional method of only cooling the outside of the pipe, the cooling effect is improved, the pipe opening of the heat exchange tube is prevented from cracking or deformation, and the production quality of the product is further improved;

[0019] 3. The present invention designs a spray assembly and uses an annular water storage pipe to be arranged on the outside of the heat exchange tube orifice. When the expansion head assembly is moved out of the heat exchange tube orifice, a plurality of second nozzles continuously spray the outer surface of the arc expansion plate, which not only extends the service life of the expansion head assembly, but also enables the expansion head assembly to operate continuously, thereby improving production efficiency. At the same time, the sprayed water cleans the powder dust on the outer wall of the expansion head assembly to prevent the powder dust adhering to the outer wall of the expansion head assembly from affecting the subsequent hole expansion operation of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a side view of the overall structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the local structure of the expansion head assembly of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the moving rod and the rotating rod of the present invention;

[0024] Figure 5 It is a schematic diagram of the sleeve structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the arc expansion plate of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structure of the fixed column and the fixed plate of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of the fixing plate and the first piston cylinder of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the spray assembly of the present invention;

[0029] Fig.10 For the present invention Fig. 9 Enlarged view of point A in the middle.

[0030] In the figure: 100, processing table body; 200, cooling assembly; 300, head expansion assembly; 400, spray assembly;

[0031] 110, first fixed seat; 111, guide block; 120, second fixed seat; 130, first electric push rod; 140, fixed plate; 141, fixed block; 150, guide rod; 160, partition;

[0032] 210, first piston cylinder; 220, first piston; 230, first piston rod; 240, buffer spring; 250, first water inlet pipe; 260, water storage tank; 270, first water outlet pipe; 280, connecting pipe; 290, water delivery pipe; 2910, fixing plate; 2920, branch pipe; 2930, first nozzle;

[0033] 310, fixed column; 320, sleeve; 330, sleeve; 331, moving groove; 340, moving rod; 350, rotating rod; 360, connecting strip; 370, arc expansion plate; 380, special-shaped plate; 390, T-shaped slider; 3910, rotating disk; 3920, slide groove; 3930, annular connecting plate; 3940, second electric push rod; 3950, connecting block; 3960, annular fixing plate; 3970, motor; 3980, first gear; 3990, second gear;

[0034] 410, special-shaped connecting rod; 420, second piston rod; 430, second piston; 440, second piston cylinder; 450, second water inlet pipe; 460, second water outlet pipe; 470, annular water storage pipe; 480, second nozzle; 490, support plate. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The following describes an embodiment of the present invention based on its overall structure.

[0037] A tube opening expansion device for heat exchange tubes, such as Figure 1-10As shown, it includes a processing table body 100, a first fixing seat 110 is fixedly installed on one side of the top of the processing table body 100, a second fixing seat 120 is fixedly installed on the top of the processing table body 100 on one side of the first fixing seat 110, a first electric push rod 130 is fixedly installed between the first fixing seat 110 and the second fixing seat 120, the telescopic end of the first electric push rod 130 extends through and extends to the other side of the second fixing seat 120 and is fixedly connected with a fixing plate 140, a partition plate 160 is fixedly installed laterally inside the processing table body 100, a cooling assembly 200 is provided between the fixing plate 140 and the second fixing seat 120, and a head expansion assembly 300 is installed on the side of the fixing plate 140 away from the telescopic end of the first electric push rod 130, and the head expansion assembly 300 is installed. 00 is provided with a spray assembly 400 on the outside; the expansion head assembly 300 includes a fixed column 310 fixedly connected to the fixed plate 140 away from the telescopic end of the first electric push rod 130, the outer wall of the fixed column 310 is provided with a sleeve 320 through a bearing sleeve, one end of the sleeve 320 is fixedly connected with a sleeve 330, the inner diameter of the sleeve 330 is larger than the diameter of the fixed column 310, the outer wall of the sleeve 330 is provided with a plurality of groups of movable grooves 331 distributed equidistantly around the circumference, and the plurality of groups of movable grooves 331 are slidably connected with movable rods 340, the upper and lower ends of each group of movable rods 340 are connected with rotating rods 350 through a rotating shaft, and the other ends of the two groups of rotating rods 350 are connected with the same connecting strip 360 through a rotating shaft, and one side of each group of connecting strips 360 is fixedly connected with an arc The rotating disk 3910 is connected to the rotating disk 3910 through a bearing on one side of the fixed disk 2910 near the sleeve 330. A plurality of groups of circumferentially equidistantly distributed sliding grooves 3920 are provided on one side of the rotating disk 3910. A special-shaped plate 380 is fixedly connected to one end of each group of arc-shaped expansion plates 370 near the rotating disk 3910. A T-shaped slider 390 matching the sliding groove 3920 is fixedly installed on the other end of each group of special-shaped plates 380. Each group of T-shaped sliders 390 is slidably connected to the corresponding sliding groove 3920. The special-shaped plates 380 are arranged in an inclined arc shape. When a plurality of groups of special-shaped plates 380 are gathered together, they present a cone-like shape. A second electric push rod 3940 is fixedly installed on the bottom of one side of the fixed plate 140 near the expansion head assembly 300. The second electric push rod 3940 The telescopic end of 940 is fixedly connected to a connecting block 3950, and the top of the connecting block 3950 is fixedly connected to an annular fixing plate 3960, and the ends of several groups of moving rods 340 away from the rotating disk 3910 are fixedly connected to the same annular connecting plate 3930, and the annular connecting plate 3930 is connected to the annular fixing plate 3960 through a bearing, and the inner diameters of the annular connecting plate 3930 and the annular fixing plate 3960 are both larger than the diameter of the sleeve 320, and a motor 3970 is fixedly installed on the top of the fixing plate 140 close to the expansion head assembly 300, and a first gear 3980 is fixedly installed on the output end of the motor 3970, and a second gear 3990 is meshed with the bottom of the first gear 3980, and the second gear 3990 is fixedly sleeved on the outer wall of the sleeve 320.

[0038] After the heat exchange tube to be processed is fixed, the staff starts the first electric push rod 130 to drive the fixing plate 140 and the fixing column 310 to move forward until the arc expansion plate 370 enters the tube mouth of the heat exchange tube. According to the aperture of the expanded hole required for production, the second electric push rod 3940 is started to drive the connecting block 3950 and the annular fixing plate 3960 to move forward, thereby driving the annular connecting plate 3930 and the plurality of groups of moving rods 340 to move synchronously. The plurality of groups of moving rods 340 are located in the moving groove 331 on the outer wall of the sleeve 330 and slide into the moving groove 331. The second electric push rod 3940 moves, driving the rotating rod 350 on each group of moving rods 340 to rotate, thereby driving a plurality of groups of arc expansion plates 370 to move outward under the mutual constraint of the T-shaped slider 390 and the slide groove 3920, and after the tube mouth of the heat exchange tube is expanded to a specified diameter, the telescopic end of the second electric push rod 3940 stops moving, and then the motor 3970 is started. The output end of the motor 3970 drives the first gear 3980 to rotate, thereby driving the second gear 3990 meshing with it to rotate, driving the sleeve 320 fixed thereto to start rotating, and then driving the sleeve 330 to start The plurality of expanded arc expansion plates 370 start to rotate, and the tube openings of the heat exchange tubes are uniformly expanded, thereby driving the rotating disk 3910 to rotate synchronously on the fixed column 310, reducing the possibility of cracks or deformation at the tube openings of the heat exchange tubes, and improving the expansion effect of the heat exchange tubes. It is worth noting that the sleeve 320 is connected to the outer wall of the fixed column 310 through a bearing sleeve, so when the sleeve 320 rotates, the fixed column 310 does not rotate. At the same time, a bearing is also provided between the annular connecting plate 3930 and the annular fixed plate 3960. When the sleeve 330 drives the annular connecting plate 3930 to rotate, the annular fixing plate 3960 does not rotate. When the expansion of the heat exchange tube is completed, the motor 3970 stops rotating, and the telescopic end of the second electric push rod 3940 is started to move backward, driving several groups of arc expansion plates 370 to reset, and the telescopic end of the first electric push rod 130 is started to move backward, driving the expansion head assembly 300 to separate from the tube mouth of the heat exchange tube. By setting the expansion head assembly 300, the staff can expand the tube according to actual production needs, which greatly improves the practicability of the device.

[0039] Please refer to Figure 1 , Figure 7 as well as Figure 8As shown, the cooling assembly 200 includes four groups of first piston cylinders 210 fixedly installed on the second fixing seat 120 near the fixing plate 140, the four groups of first piston cylinders 210 are distributed at the four corners of one side of the second fixing seat 120, and each group of first piston cylinders 210 is slidably connected with a first piston 220, one side of each group of first pistons 220 is fixedly connected with a first piston rod 230, the other end of each group of first piston rods 230 passes through the top of the corresponding first piston cylinder 210 and is fixedly connected to one side of the fixing plate 140, the outer bottom of each group of first piston cylinders 210 is fixedly connected with a first water inlet pipe 250, each group of first water inlet pipes 250 passes through and extends to the inside of the processing table body 100 and is fixedly connected to the same water tank 260, the water tank 260 is fixedly installed on the upper surface of the partition 160, and one end of the outer bottom of each group of first piston cylinders 210 away from the first water inlet pipe 250 is fixedly connected to the first water outlet pipe 270, and the other end of each group of first water outlet pipes 270 extends through the inner cavity of the fixed plate 140 and is fixedly connected to the same connecting pipe 280, one end of the connecting pipe 280 is fixedly connected to a water pipe 290, and the water pipe 290 is arranged in the inner cavity of the fixed column 310, and the outer wall of the fixed column 310 is fixedly sleeved with a fixed disk 2910, and the outer wall of the other end of the water pipe 290 is fixedly connected to a plurality of groups of branch pipes 2920 distributed equidistantly in a circle, each group of branch pipes 2920 is arranged inside the fixed disk 2910, and the other end of each group of branch pipes 2920 is fixedly installed with a first nozzle 2930.

[0040] As the fixing plate 140 moves forward, the first piston rod 230 and the first piston 220 are driven to move toward the top of the first piston cylinder 210. At this time, negative pressure is generated in the first piston cylinder 210, and the water in the water storage tank 260 is pumped out into the first piston cylinder 210 through the first water inlet pipe 250. After the expansion of the pipe mouth of the heat exchange tube is completed, the telescopic end of the first electric push rod 130 drives the fixing plate 140 to move backward, thereby driving the first piston rod 230 and the first piston 220 to move toward the bottom of the first piston cylinder 210, squeezing the water inside the first piston cylinder 210, and entering the water delivery pipe 290 through the first water outlet pipe 270, and then entering several groups of branch pipes 2920 and finally being sprayed out by the first nozzle 2930, so as to cool the inner wall of the pipe mouth of the heat exchange tube. Compared with the traditional method of only cooling the outside of the pipeline, the cooling effect is improved, the pipe mouth of the heat exchange tube is prevented from cracking or deformation, and the production quality of the product is further improved.

[0041] Please refer to Figure 1 , Fig. 9 as well as Fig.10As shown, the spray assembly 400 includes a special-shaped connecting rod 410 fixedly installed at the bottom of the fixing plate 140, and a movable groove matching the special-shaped connecting rod 410 is opened on one side of the top of the processing table body 100. The other end of the special-shaped connecting rod 410 extends into the interior of the processing table body 100 and is fixedly connected to a second piston rod 420. A second piston 430 is fixedly installed at the other end of the second piston rod 420. A second piston cylinder 440 is sleeved on the outer side of the second piston 430. The second piston cylinder 440 is fixedly connected to the upper surface of the partition 160 through a base. A second water inlet pipe 450 is fixedly connected to the bottom end of the second piston cylinder 440. The other end of the second water inlet pipe 450 It is fixedly connected to one side of the water tank 260, and the second piston cylinder 440 is fixedly connected to the second water outlet pipe 460 at the bottom end of the outer side. The other end of the second water outlet pipe 460 extends to the top of one side of the processing table body 100 and is fixedly connected to an annular water storage pipe 470, and a plurality of groups of second nozzles 480 equidistantly distributed in a circle are fixedly connected to the inner side of the annular water storage pipe 470. A support plate 490 is fixedly installed on one side of the processing table body 100, and the other end of the support plate 490 is sleeved on the outer side of the second water outlet pipe 460. One-way valves are fixedly installed inside the second water inlet pipe 450, the second water outlet pipe 460, the first water inlet pipe 250 and one end of the first water outlet pipe 270.

[0042] As the fixing plate 140 moves forward, the special-shaped connecting rod 410 is driven to move forward, thereby driving the second piston rod 420 and the second piston 430 to move toward the top of the second piston cylinder 440. At this time, negative pressure is generated in the second piston cylinder 440, and the water in the water storage tank 260 is pumped out into the second piston cylinder 440 through the second water inlet pipe 450. When the expansion of the pipe opening of the heat exchange tube is completed, the telescopic end of the first electric push rod 130 drives the fixing plate 140 to move backward, driving the expansion head assembly 300 to move out of the pipe opening of the heat exchange tube. At the same time, the fixing plate 140 moves backward, driving the second piston rod 420 and the second piston 430 to move toward the bottom of the second piston cylinder 440, The water inside the second piston cylinder 440 is squeezed and enters the annular water storage pipe 470 through the second water outlet pipe 460, and is then sprayed out by a plurality of second nozzles 480. The annular water storage pipe 470 is arranged on the outside of the heat exchange tube orifice. When the expansion head assembly 300 is moved out of the heat exchange tube orifice, the plurality of second nozzles 480 continuously spray the outer surface of the arc expansion plate 370, which not only extends the service life of the expansion head assembly 300, but also enables the expansion head assembly 300 to operate continuously, thereby improving production efficiency. At the same time, the sprayed water cleans the powder dust on the outer wall of the expansion head assembly 300 to prevent the powder dust adhering to the outer wall of the expansion head assembly 300 from affecting the subsequent hole expansion operation of the heat exchange tube.

[0043] Please refer to Fig. 9As shown, a fixing block 141 is fixedly installed on the top of the fixing plate 140, a guide rod 150 is fixedly connected to one side of the fixing block 141, a guide block 111 is fixedly installed on the top of the first fixing seat 110, a through hole matching the guide rod 150 is opened on the guide block 111, and the guide rod 150 passes through the through hole and is slidably connected to the guide block 111.

[0044] By providing the guide rod 150 to cooperate with the guide block 111 , the first electric push rod 130 can operate more stably.

[0045] Please refer to Figure 8 As shown, a buffer spring 240 is sleeved on the outer wall of each group of first piston rods 230 , one end of the buffer spring 240 is fixedly connected to one side of the fixing plate 140 , and the other end is fixedly connected to the top of the first piston cylinder 210 .

[0046] By providing the buffer spring 240 , the telescopic end of the first electric push rod 130 drives the fixed plate 140 to move with a certain buffering effect, thereby improving the stability of the overall operation of the device.

[0047] During use, after the heat exchange tube to be processed is fixed, the staff starts the first electric push rod 130 to drive the fixing plate 140 and the fixing column 310 to move forward until the arc expansion plate 370 enters the tube mouth of the heat exchange tube, and according to the aperture of the expanded hole required for production, starts the second electric push rod 3940 to drive the connecting block 3950 and the annular fixing plate 3960 to move forward, thereby driving the annular connecting plate 3930 and several groups of moving rods 340 to move synchronously, and several groups of moving rods 340 are located in the moving groove 331 of the outer wall of the sleeve 330 to slide, driving The rotating rod 350 on each group of moving rods 340 rotates, thereby driving a plurality of groups of arc expansion plates 370 to move outward under the mutual constraint of the T-shaped slider 390 and the slide groove 3920, and after the tube mouth of the heat exchange tube is expanded to a specified diameter, the telescopic end of the second electric push rod 3940 stops moving, and then the motor 3970 is started. The output end of the motor 3970 drives the first gear 3980 to rotate, thereby driving the second gear 3990 meshing with it to rotate, driving the sleeve 320 fixed thereto to start rotating, and then driving the sleeve 330 to start rotating, so that the plurality of groups of expanded arc expansion plates 370 are The shaped expansion plate 370 starts to rotate, and the tube mouth of the heat exchange tube is evenly expanded, thereby driving the rotating disk 3910 to rotate synchronously on the fixed column 310, reducing the possibility of cracks or deformation at the tube mouth of the heat exchange tube, and improving the expansion effect of the heat exchange tube. It is worth noting that the sleeve 320 is connected to the outer wall of the fixed column 310 through a bearing sleeve, so when the sleeve 320 rotates, the fixed column 310 does not rotate. At the same time, a bearing is also provided between the annular connecting plate 3930 and the annular fixed plate 3960. When the sleeve 330 drives the annular connecting plate 3930 to rotate, the annular The shaped fixing plate 3960 does not rotate. When the expansion of the heat exchange tube is completed, the motor 3970 stops rotating, the telescopic end of the second electric push rod 3940 is started to move backward, driving several groups of arc expansion plates 370 to reset, and the telescopic end of the first electric push rod 130 is started to move backward, driving the expansion head assembly 300 to separate from the tube mouth of the heat exchange tube. By setting up the expansion head assembly 300, the staff can expand the tube according to actual production needs, which greatly improves the practicability of the device. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0048] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A tube opening expansion device for a heat exchange tube, comprising a processing table body (100), characterized in that: A first fixing seat (110) is fixedly installed on one side of the top of the processing table body (100); a second fixing seat (120) is fixedly installed on the top of the processing table body (100) on one side of the first fixing seat (110); a first electric push rod (130) is fixedly installed between the first fixing seat (110) and the second fixing seat (120); a telescopic end of the first electric push rod (130) extends through and extends to the other side of the second fixing seat (120) and is fixedly connected to a fixing plate (140); a partition plate (160) is fixedly installed transversely inside the processing table body (100); a cooling assembly (200) is provided between the fixing plate (140) and the second fixing seat (120); a head expansion assembly (300) is installed on the side of the fixing plate (140) away from the telescopic end of the first electric push rod (130); and a spray assembly (400) is provided on the outside of the head expansion assembly (300); The expansion head assembly (300) comprises a fixed column (310) fixedly connected to a side of the fixed plate (140) away from the telescopic end of the first electric push rod (130); the outer wall of the fixed column (310) is provided with a sleeve (320) through a bearing sleeve; one end of the sleeve (320) is fixedly connected to a sleeve (330); the inner diameter of the sleeve (330) is larger than the diameter of the fixed column (310); the outer wall of the sleeve (330) is provided with a plurality of groups of movable grooves (331) equidistantly distributed around the circumference; the plurality of groups of movable grooves (331) are all slidably connected to movable rods (340); the upper and lower ends of each group of movable rods (340) are connected to rotating rods (350) through a rotating shaft; the other ends of the two groups of rotating rods (350) are connected to the same connecting bar (360) through a rotating shaft; one side of each group of connecting bars (360) is fixedly connected to an arc-shaped expansion plate (370); The cooling assembly (200) comprises four groups of first piston cylinders (210) fixedly mounted on one side of the second fixing seat (120) close to the fixing plate (140), the four groups of first piston cylinders (210) being distributed at four corners of one side of the second fixing seat (120), and each group of first piston cylinders (210) being slidably connected with a first piston (220), one side of each group of first pistons (220) being fixedly connected with a first piston rod (230), the other end of each group of first piston rods (230) passing through the top of the corresponding first piston cylinder (210) and being fixedly connected to one side of the fixing plate (140), the outer bottom of each group of first piston cylinders (210) being fixedly connected with a first water inlet pipe (250), each group of first water inlet pipes (250) passing through and extending into the interior of the processing table body (100) and being fixedly connected with the same water storage tank (260), the water storage tank (260) 60) is fixedly installed on the upper surface of the partition (160), one end of the outer bottom of each group of the first piston cylinders (210) away from the first water inlet pipe (250) is fixedly connected to the first water outlet pipe (270), and the other end of each group of the first water outlet pipe (270) extends through the inner cavity of the fixed plate (140) and is fixedly connected to the same connecting pipe (280), one end of the connecting pipe (280) is fixedly connected to a water pipe (290), and the water pipe (290) is arranged in the inner cavity of the fixed column (310), and the outer wall of the fixed column (310) is fixedly sleeved with a fixed disk (2910), and the outer wall of the other end of the water pipe (290) is fixedly connected to a plurality of groups of circumferentially equidistantly distributed branch pipes (2920), each group of the branch pipes (2920) is arranged inside the fixed disk (2910), and the other end of each group of the branch pipes (2920) is fixedly installed with a first nozzle (2930).

2. The tube opening expansion device for heat exchange tubes according to claim 1, characterized in that: The fixed disk (2910) is connected to a rotating disk (3910) via a bearing on one side close to the sleeve (330); a plurality of groups of circumferentially equidistant sliding grooves (3920) are provided on one side of the rotating disk (3910); one end of each group of arc expansion plates (370) close to the rotating disk (3910) is fixedly connected to a special-shaped plate (380); the other end of each group of special-shaped plates (380) is fixedly mounted with a T-shaped slider (390) matching the sliding groove (3920); each group of the T-shaped sliders (390) is slidably connected to the corresponding sliding groove (3920).

3. The tube opening expansion device for heat exchange tubes according to claim 2, characterized in that: A second electric push rod (3940) is fixedly installed at the bottom of one side of the fixed plate (140) close to the expansion head assembly (300); the telescopic end of the second electric push rod (3940) is fixedly connected to a connecting block (3950); the top of the connecting block (3950) is fixedly connected to an annular fixed plate (3960); a plurality of groups of moving rods (340) are fixedly connected to the same annular connecting plate (3930) at one end away from the rotating disk (3910); the annular connecting plate (3930) is connected to the annular fixing plate (3960) via a bearing; the inner diameters of the annular connecting plate (3930) and the annular fixing plate (3960) are both larger than the diameter of the sleeve (320).

4. The tube opening expansion device for heat exchange tubes according to claim 1, characterized in that: A motor (3970) is fixedly mounted on the top of one side of the fixing plate (140) close to the expansion head assembly (300); a first gear (3980) is fixedly mounted on the output end of the motor (3970); a second gear (3990) is meshed at the bottom of the first gear (3980); and the second gear (3990) is fixedly sleeved on the outer wall of the sleeve (320).

5. The tube opening expansion device for heat exchange tubes according to claim 2, characterized in that: The special-shaped plates (380) are arranged in an inclined arc shape, and when a plurality of groups of the special-shaped plates (380) are gathered together, they present a cone-like shape.

6. The tube opening expansion device for heat exchange tubes according to claim 1, characterized in that: The spray assembly (400) comprises a special-shaped connecting rod (410) fixedly mounted on the bottom of the fixing plate (140); a movable groove matching the special-shaped connecting rod (410) is provided on one side of the top of the processing table body (100); the other end of the special-shaped connecting rod (410) extends into the interior of the processing table body (100) and is fixedly connected to a second piston rod (420); a second piston (430) is fixedly mounted on the other end of the second piston rod (420); a second piston cylinder (440) is sleeved on the outer side of the second piston (430); the second piston cylinder (440) is fixedly connected to the upper surface of the partition (160) via a base; the bottom of the second piston cylinder (440) is A second water inlet pipe (450) is fixedly connected to the end of the processing table body (100); the other end of the second water inlet pipe (450) is fixedly connected to one side of the water storage tank (260); a second water outlet pipe (460) is fixedly connected to the outer bottom end of the second piston cylinder (440); the other end of the second water outlet pipe (460) extends to the top of one side of the processing table body (100) and is fixedly connected to an annular water storage pipe (470); a plurality of groups of second nozzles (480) equidistantly distributed in a circumference are fixedly connected to the inner side of the annular water storage pipe (470); a support plate (490) is fixedly installed on one side of the processing table body (100); the other end of the support plate (490) is sleeved on the outer side of the second water outlet pipe (460).

7. The tube opening expansion device for heat exchange tubes according to claim 6, characterized in that: One-way valves are fixedly installed inside one end of the second water inlet pipe (450), the second water outlet pipe (460), the first water inlet pipe (250) and the first water outlet pipe (270).

8. The tube opening expansion device for heat exchange tubes according to claim 1, characterized in that: A fixing block (141) is fixedly mounted on the top of the fixing plate (140), a guide rod (150) is fixedly connected to one side of the fixing block (141), a guide block (111) is fixedly mounted on the top of the first fixing seat (110), a through hole matching the guide rod (150) is formed on the guide block (111), and the guide rod (150) passes through the through hole and is slidably connected to the guide block (111).

9. The tube opening expansion device for heat exchange tubes according to claim 1, characterized in that: A buffer spring (240) is sleeved on the outer wall of each group of the first piston rods (230); one end of the buffer spring (240) is fixedly connected to one side of the fixing plate (140), and the other end is fixedly connected to the top of the first piston cylinder (210).

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