A heat exchanger pipe tapping mechanism

Abstract

The present invention relates to the field of pipe processing technology, specifically a heat exchanger pipe tapping mechanism, comprising a profile rack, a pick-and-place unit, a lifting unit, a positioning unit and a three-axis tapping machine, wherein the pick-and-place unit is fixedly arranged on the top of the profile rack, the lifting unit is fixedly arranged on the top of the profile rack and is located at the bottom of the pick-and-place unit, and the positioning units are distributed and fixed on the top of the profile rack in the front and back. The pick-and-place unit transports three heat exchanger pipes to the processing station each time, and the three heat exchanger pipes are synchronously tapped by the front and rear three-axis tapping machines at the same time, with sufficient processing capacity and high processing efficiency. After the tapping is completed, the pick-and-place unit transports the three heat exchanger pipes to the processing station again, and pushes the three processed heat exchanger pipes from the processing station to the unloading station, and automatically unloads after processing. The overall processing automation level is high, saving labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing, in particular to a heat exchanger pipe tapping mechanism. Background Art

[0002] The heat pipe heat exchanger with heat pipe as the heat transfer unit is a new type of high-efficiency heat exchanger, which is composed of a shell, a heat pipe and a partition. As the main heat transfer element, the heat pipe is a heat transfer device with high thermal conductivity. It is a vacuum container, and its basic components are the shell, the liquid wick and the working fluid. After the shell is evacuated and filled with an appropriate amount of working fluid, the closed shell forms a heat pipe. When the heat source supplies heat to one end of it, the working fluid absorbs heat from the heat source and evaporates. The steam carrying latent heat is transmitted to the other end of the shell at high speed under the action of the pressure difference, and releases latent heat to the cold source and condenses. The condensate returns to the hot end and boils and vaporizes again. This cycle is repeated, and heat is continuously transferred from the hot end to the cold end. The heat pipe of the tubular heat exchanger usually needs to be tapped to facilitate installation and combination with other components.

[0003] According to a Chinese patent application with publication number 202210881660.X, a pipe tapping machine is disclosed, which realizes automatic feeding, conveying, clamping and tapping of pipes; realizes automated processing and has high processing efficiency. Although the pipe tapping machine can simultaneously process the key two ends at a time, it is limited to processing a single pipe each time. Although the efficiency is improved compared to manual processing, it is still not fast enough. If multiple pipes can be processed simultaneously during each processing, the efficiency will be greatly improved. To this end, we propose a heat exchanger pipe tapping mechanism to solve the above technical problems. Summary of the Invention

[0004] The present invention provides the following technical solution: a heat exchanger pipe tapping mechanism, comprising: a profile rack; a pick-and-place unit, fixedly arranged on the top of the profile rack, used for automatically loading and unloading heat exchanger pipes; a lifting unit, fixedly arranged on the top of the profile rack and located at the bottom of the pick-and-place unit, the lifting unit being used to lift and support the heat exchanger pipes; a positioning unit, distributed front and back and fixedly arranged on the top of the profile rack, and located between the bottom of the pick-and-place unit and the top of the lifting unit, the positioning unit and the lifting unit positioning the heat exchanger pipes; a three-axis tapping machine, symmetrically arranged front and back on the top of the profile rack.

[0005] As a preferred solution of the present invention, the picking and placing unit includes: a square tube rack, fixedly mounted on the top of the profile rack; a connecting plate, fixedly mounted on the end of the square tube rack; a push cylinder, fixedly mounted on the end of the square tube rack away from the connecting plate; a drag plate, fixedly mounted on the end of the output rod of the push cylinder; a translation plate, fixedly mounted on the end of the drag plate away from the push cylinder; a lifting cylinder, fixedly mounted on the side of the translation plate away from the drag plate; a shift block, fixedly mounted on the bottom of the output rod of the lifting cylinder; sleeper rails, distributed front and back and fixedly mounted on the top of the profile rack; a polished rod, distributed front and back and fixedly mounted on the right end of the connecting plate, and the translation plate is slidably mounted on the outer walls of the front and rear polished rods.

[0006] As a preferred solution of the present invention, the lifting unit includes: an aluminum profile frame, located on the top of the profile frame; a bottom angle plate, fixedly installed at the front and rear ends of the aluminum profile frame; a bottom guide rod, distributed up and down and fixedly installed between the left and right bottom angle plates; a bottom outer pressure block, distributed left and right and slidably installed on the periphery of the upper and lower bottom guide rods; a bottom outer sleeper, respectively fixedly installed on the top of the two bottom outer pressure blocks; a bottom outer arc groove, opened at the top of the end where the two bottom outer sleepers are close to each other; a bottom inner pressure block, distributed left and right and slidably installed on the periphery of the upper and lower bottom guide rods, and located between the left and right bottom outer pressure blocks; a bottom inner sleeper, respectively fixedly installed on the top of the two bottom inner pressure blocks; a bottom inner arc groove, symmetrically distributed left and right and opened at the upper left corner and the upper right corner of the top of the bottom inner sleeper, and the specifications of the bottom inner arc groove correspond to the specifications of the bottom outer arc groove.

[0007] As a preferred solution of the present invention, the lifting unit also includes: a lifting rod, which is fixedly installed on the left and right ends of the bottom of the aluminum profile frame in a front-to-back distribution, and there are four in total, and the four lifting rods slide through the interior of the profile frame; a lifting seat, which is slidably installed on the lower part of the outer wall of the left and right lifting rods; a lifting cylinder, which is fixedly installed on the top of the profile frame in a front-to-back distribution, and its output rod movably passes through the interior of the profile frame; an extrusion vertical plate, which is fixedly installed on the side of the lifting seat in a left-to-right distribution; a wedge surface, which is opened on the upper part of the opposite surfaces of the left and right extrusion vertical plates; an L-shaped lifting arm, which is symmetrically distributed and fixedly installed on the outer surfaces of the two bottom external pressure blocks; a guide wheel, which is rotatably installed with the L-shaped lifting arm through an axle pin, and is located at the end of the L-shaped lifting arm away from the bottom external pressure block, and the position of the guide wheel corresponds to the position of the wedge surface; a buffer spring, which is sleeved on the periphery of the lifting rod and fixedly installed between the bottom of the profile frame and the top of the lifting seat.

[0008] As a preferred solution of the present invention, the lifting unit also includes: a push head, fixedly mounted on the back sides of the left and right bottom outer pressure blocks, and extending to the top of the bottom outer sleeper; a U-shaped groove, opened at the top of the push head, and the inner diameter of the U-shaped groove is larger than the outer diameter of the top guide rod.

[0009] As a preferred solution of the present invention, the lifting unit also includes: a bottom return spring, which is sleeved on the outer periphery of the top guide rod and fixedly installed between the bottom outer pressure block and the bottom inner pressure block; a bottom positioning rod one, which is fixedly installed on the outer surface of the bottom angle plate; a bottom positioning rod two, which is fixedly installed on the side of the bottom outer pressure block away from the aluminum profile frame, and the bottom positioning rod two is on the same side as the bottom positioning rod; a bottom tension spring, which is fixedly installed between the bottom positioning rod one and the bottom positioning rod two.

[0010] As a preferred solution of the present invention, the positioning unit includes: a top angle plate, which is fixedly installed on the side wall of the square tube frame on the left and right sides; a top guide rod, which is fixedly installed between the left and right top angle plates on the upper and lower sides, and has the same specifications as the bottom guide rod; a top external pressure block, which is fixedly installed on the periphery of the upper and lower top guide rods on the left and right sides; a top external sleeper, which is fixedly installed on the bottom of the top external pressure block; a top external arc groove, which is opened at the lower end of a side surface where the left and right top external sleepers are close to each other; a top internal pressure block, which is slidingly installed on the periphery of the upper and lower top guide rods on the left and right sides, and is located between the left and right top external pressure blocks; a top internal sleeper, which is fixedly installed on the bottom of the top internal pressure block; and a top internal arc groove, which is symmetrically opened at both ends of the bottom of the top internal sleeper.

[0011] As a preferred solution of the present invention, the positioning unit also includes: a top return spring, which is sleeved on the outer periphery of the top guide rod and fixedly installed between the top outer pressure block and the top inner pressure block; a top positioning rod one, which is fixedly installed on the top of the top angle plate; a top positioning rod two, which is fixedly installed on the top of the top outer pressure block; and a top tension spring, which is fixedly installed between the top positioning rod one and the top positioning rod two.

[0012] As a preferred solution of the present invention, the position and specifications of the top external pressure block are the same as those of the bottom external pressure block, the position and specifications of the top internal pressure block are the same as those of the bottom internal pressure block, the specifications of the top external arc groove and the top internal arc groove are compatible with the specifications of the outer wall of the heat exchanger pipe, and the specifications of the bottom external arc groove and the bottom internal arc groove are compatible with the specifications of the outer wall of the heat exchanger pipe.

[0013] As a preferred solution of the present invention, a pre-storage groove is provided at the top left end of the sleeper rail, three positioning arc grooves equidistantly distributed on the left and right are provided in the top middle area of the sleeper rail, the specifications of the positioning arc grooves are compatible with the specifications of the outer wall of the heat exchanger pipe fittings, and an inclined guide surface is provided at the top right end of the sleeper rail.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In the present invention, three heat exchanger pipe fittings are transported to the processing station each time by the pick-and-place unit, and the three heat exchanger pipe fittings are synchronously tapped by the front and rear three-axis tapping machines. The processing capacity is sufficient and the processing efficiency is high. After the tapping is completed, the pick-and-place unit transports the three heat exchanger pipe fittings to the processing station again, and pushes the three processed heat exchanger pipe fittings from the processing station to the unloading station. After the processing is completed, the automatic unloading is completed. The overall processing automation level is high, saving labor costs.

[0016] 2. In the present invention, after the three lifting units are lifted by the lifting unit, the positioning unit is used in conjunction with the positioning unit to achieve the positioning effect of the three positioning units at the same time, ensuring the stability of the three positioning units during the tapping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the present invention from a right front perspective;

[0018] Figure 2 This is a schematic diagram of the structure from a top perspective of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the pick-and-place unit in the present invention;

[0020] Figure 4 For the present invention Figure 1 Schematic diagram of the local structure;

[0021] Figure 5 Schematic diagram of the structure of the positioning unit in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the lifting unit in the present invention;

[0023] Figure 7 For the present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0024] Figure 8 For the present invention Figure 6 Schematic diagram of the enlarged structure of part B.

[0025] In the figure: 100, profile frame; 200, pick-and-place unit; 201, square tube frame; 202, connecting plate; 203, push cylinder; 204, drag plate; 205, translation plate; 206, lifting cylinder; 207, shift block; 208, sleeper rail; 2081, pre-storage groove; 2082, positioning arc groove; 2083, inclined guide surface; 209, polished rod; 300, lifting unit; 301, aluminum profile frame; 302, bottom angle plate; 303, bottom guide rod; 304, bottom outer pressure block; 305, bottom outer sleeper; 306, bottom outer arc groove; 307, bottom inner pressure block; 308, bottom inner sleeper; 309, bottom inner arc groove; 3010, lifting rod; 3011, lifting seat; 3012, lifting cylinder; 301 3. Extrusion vertical plate; 3014. Wedge surface; 3015. L-shaped lifting arm; 3016. Guide wheel; 3017. Buffer spring; 3018. Push head; 3019. U-shaped groove; 3021. Bottom return spring; 3022. Bottom positioning rod 1; 3023. Bottom positioning rod 2; 3024. Bottom tension spring; 400. Positioning unit; 401. Top angle plate; 402. Top guide rod; 403. Top outer pressure block; 404. Top outer sleeper; 405. Top outer arc groove; 406. Top inner pressure block; 407. Top inner sleeper; 408. Top inner arc groove; 409. Top return spring; 4010. Top positioning rod 1; 4011. Top positioning rod 2; 4012. Top tension spring; 500. Three-axis tapping machine. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 8 The technical solution provided by the present invention specifically includes the following embodiments:

[0028] A heat exchanger pipe tapping mechanism includes a profile rack 100, a pick-and-place unit 200, a lifting unit 300, a positioning unit 400 and a three-axis tapping machine 500. The pick-and-place unit 200 is fixedly arranged on the top of the profile rack 100 and is used for automatically loading and unloading heat exchanger pipes. The lifting unit 300 is fixedly arranged on the top of the profile rack 100 and is located at the bottom of the pick-and-place unit 200. The lifting unit 300 is used to lift and support the heat exchanger pipes. The positioning units 400 are fixedly arranged on the top of the profile rack 100 in a front-to-back distribution and are located between the bottom of the pick-and-place unit 200 and the top of the lifting unit 300. The positioning unit 400 and the lifting unit 300 are used to position the heat exchanger pipes. The three-axis tapping machine 500 is symmetrically arranged on the top of the profile rack 100.

[0029] For further details, please refer to Figure 1 、 Figure 3 and Figure 4 As shown:

[0030] The pick-and-place unit 200 includes a square tube frame 201, a connecting plate 202, a horizontal push cylinder 203, a drag plate 204, a translation plate 205, a lifting cylinder 206, a shift block 207, a sleeper rail 208 and a polished rod 209. The square tube frame 201 is fixedly mounted on the top of the profile frame 100, the connecting plate 202 is fixedly mounted on the end of the square tube frame 201, the horizontal push cylinder 203 is fixedly mounted on the end of the square tube frame 201 away from the connecting plate 202, the drag plate 204 is fixedly mounted on the end of the output rod of the horizontal push cylinder 203, the translation plate 205 is fixedly mounted on the end of the drag plate 204 away from the horizontal push cylinder 203, and the lifting cylinder 206 is fixedly mounted on the translation plate 2 05 is on the side away from the drag plate 204, the shift block 207 is fixedly installed at the bottom of the output rod of the lifting cylinder 206, the sleeper rails 208 are distributed front and back and fixedly installed on the top of the profile frame 100, the light rods 209 are distributed front and back and fixedly installed on the right end of the connecting plate 202, and the translation plate 205 is slidably installed on the outer walls of the front and rear light rods 209, a pre-storage groove 2081 is provided at the top left end of the sleeper rail 208, and three positioning arc grooves 2082 equidistantly distributed on the left and right are provided in the middle area of the top of the sleeper rail 208. The specifications of the positioning arc grooves 2082 are adapted to the specifications of the outer wall of the heat exchanger pipe fittings, and an inclined guide surface 2083 is provided at the top right end of the sleeper rail 208.

[0031] Specifically, the heat exchanger pipes are transported to the left ends of the tops of the front and rear sleeper rails 208 at intervals through the conveying equipment, so that the heat exchanger pipes are supported on the tops of the front and rear pre-storage grooves 2081, and the heat exchanger pipes are prevented from rolling to the right by the inclined surface at the right end of the pre-storage groove 2081. Then, the output rod of the lifting cylinder 206 pushes the shift block 207 downward to move, so that the shift block 207 moves down to the left side of the third heat exchanger pipe from the rightmost end of the top of the pre-storage groove 2081. Subsequently, the output rod of the horizontal push cylinder 203 retracts and drives the translation plate 205 to move along the front and rear light rods 209 toward the direction close to the horizontal push cylinder 203 through the drag plate 204. At this time, the translation plate 205 is connected to the lifting cylinder 206. The shift block 207 is then driven to move together, and the three heat exchanger pipe fittings at the rightmost end of the top of the pre-storage groove 2081 are shifted to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn. Then, the output rod of the horizontal push cylinder 203 stops moving. At this time, the three positioning arc grooves 2082 respectively limit the three heat exchanger pipe fittings to prevent the three heat exchanger pipe fittings from continuing to roll. Then, the conveying equipment continues to transport the three conveying equipment to the top of the front and rear pre-storage grooves 2081 for processing. At the same time, the output rod of the lifting cylinder 206 drives the shift block 207 to move upward. Then, the output rod of the horizontal push cylinder 203 extends through the drag plate 204 to push the translation plate 20 5 moves along the front and rear polished rods 209 in a direction away from the push cylinder 203, and the shift block 207 is driven to move together by the lifting cylinder 206. Since the output rod of the lifting cylinder 206 drives the shift block 207 to move upward, when the shift block 207 moves in a direction away from the push cylinder 203, the bottom of the shift block 207 will not contact the top of the heat exchanger pipe at the top of the pre-storage groove 2081. Therefore, the heat exchanger pipe at the top of the pre-storage groove 2081 will not roll in the opposite direction. When the tapping process of the three heat exchanger pipes is completed, the output rod of the lifting cylinder 206 pushes the shift block 207 downward, so that the shift block 207 moves down to the third heat exchanger pipe from the rightmost end of the top of the pre-storage groove 2081. On the left side, the output rod of the push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear light rods 209 toward the push cylinder 203 through the drag plate 204. At this time, the translation plate 205 drives the shift block 207 to move together through the connection of the lifting cylinder 206, and shifts the three heat exchanger pipe fittings at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn, and push the heat exchanger pipe fittings that have been tapped in the previous step to the right, and push the three processed heat exchanger pipe fittings to the top of the inclined guide surface 2083, and finally roll to the right along the top of the inclined guide surface 2083 to complete the blanking after tapping.

[0032] For further details, please refer to Figure 4 、 Figure 6 and Figure 7 As shown:

[0033] The lifting unit 300 includes an aluminum profile frame 301, a bottom angle plate 302, a bottom guide rod 303, a bottom outer pressure block 304, a bottom outer sleeper 305, a bottom outer arc groove 306, a bottom inner pressure block 307, a bottom inner sleeper 308, a bottom inner arc groove 309, a lifting rod 3010, a lifting seat 3011, a lifting cylinder 3012, an extrusion vertical plate 3013, a wedge surface 3014, an L-shaped lifting arm 3015, a guide wheel 3016 and a buffer spring 3017. The aluminum profile frame 301 is located at the top of the profile frame 100, and the bottom angle plate 302 is fixedly installed at the front ends and the rear of the aluminum profile frame 301. At both ends, the bottom guide rod 303 is fixedly installed between the left and right bottom angle plates 302, the bottom outer pressure block 304 is slidably installed on the outer periphery of the upper and lower bottom guide rods 303, the bottom outer sleepers 305 are respectively fixedly installed on the top of the two bottom outer pressure blocks 304, the bottom outer arc groove 306 is opened on the top of the end close to the two bottom outer sleepers 305, the bottom inner pressure block 307 is slidably installed on the outer periphery of the upper and lower bottom guide rods 303, and is located between the left and right bottom outer pressure blocks 304, the bottom inner sleepers 308 are respectively fixedly installed on the top of the two bottom inner pressure blocks 307, the bottom The inner arc grooves 309 are symmetrically distributed on the left and right upper corners of the top of the bottom inner sleeper 308. The specifications of the bottom inner arc grooves 309 correspond to the specifications of the bottom outer arc grooves 306. The lifting rods 3010 are fixedly installed on the left and right ends of the bottom of the aluminum profile frame 301. There are four of them. The four lifting rods 3010 slide through the interior of the profile frame 100. The lifting seats 3011 are slidably installed on the lower outer walls of the left and right lifting rods 3010. The lifting cylinders 3012 are fixedly installed on the top of the profile frame 100 in a front-to-back distribution, and their output rods move through the interior of the profile frame 100 to squeeze the vertical plate 3010. 013 are distributed and fixedly installed on the side of the lifting seat 3011 on the left and right, and the wedge surface 3014 is opened on the upper part of the opposite surfaces of the left and right extrusion vertical plates 3013. The L-shaped lifting arms 3015 are symmetrically distributed and fixedly installed on the outer surfaces of the two bottom external pressure blocks 304. The guide wheel 3016 is rotatably installed with the L-shaped lifting arm 3015 through an axle pin, and is located at the end of the L-shaped lifting arm 3015 away from the bottom external pressure block 304. The position of the guide wheel 3016 corresponds to the position of the wedge surface 3014. The buffer spring 3017 is sleeved on the outer periphery of the lifting rod 3010 and fixedly installed between the bottom of the profile frame 100 and the top of the lifting seat 3011.

[0034] Specifically, after the three heat exchanger pipes enter the three positioning arc grooves 2082, the output rods of the front and rear two lifting cylinders 3012 retract, pushing the front and rear two lifting seats 3011 to move upward, and further under the connection action of the buffer spring 3017, the lifting rod 3010 moves upward, and drives the aluminum profile frame 301, the bottom angle plate 302, the bottom guide rod 303, the bottom outer pressure block 304, the bottom outer sleeper 305, the bottom outer arc groove 306, the bottom inner pressure block 307, the bottom outer pressure block 308 and the bottom inner pressure block 309. The block 307, the bottom inner sleeper 308, the bottom inner arc groove 309, the extrusion vertical plate 3013, the wedge surface 3014, the L-shaped lifting arm 3015, the guide wheel 3016 and the push head 3018 move upward. At the same time, the bottom outer arc groove 306 and the bottom inner arc groove 309 move upward. After the three heat exchanger pipe fittings located inside the three positioning arc grooves 2082 are lifted upward to the tapping station, the pipe ends of the three heat exchanger pipe fittings are tapped simultaneously by the front and rear two three-axis tapping machines 500.

[0035] For further details, please refer to Figure 4 、 Figure 5 and Figure 6 As shown:

[0036] The lifting unit 300 also includes a push head 3018, a U-shaped groove 3019, a bottom return spring 3021, a bottom positioning rod 1 3022, a bottom positioning rod 2 3023 and a bottom tension spring 3024. The push head 3018 is fixedly mounted on the opposite back surfaces of the left and right bottom outer pressure blocks 304 and extends to the top of the bottom outer sleeper 305. The U-shaped groove 3019 is opened at the top of the push head 3018. The inner diameter of the U-shaped groove 3019 is larger than the outer diameter of the top guide rod 402. The bottom return spring 3021 is sleeved The bottom positioning rod 3022 is fixedly mounted on the outer periphery of the top guide rod 402 and between the bottom outer pressure block 304 and the bottom inner pressure block 307. The bottom positioning rod 1 3022 is fixedly mounted on the outer surface of the bottom angle plate 302. The bottom positioning rod 2 3023 is fixedly mounted on the side of the bottom outer pressure block 304 away from the aluminum profile frame 301. The bottom positioning rod 2 3023 is on the same side as the bottom positioning rod 1 3022. The bottom tension spring 3024 is fixedly mounted between the bottom positioning rod 1 3022 and the bottom positioning rod 2 3023.

[0037] The positioning unit 400 includes a top angle plate 401, a top guide rod 402, a top external pressure block 403, a top external sleeper 404, a top external arc groove 405, a top internal pressure block 406, a top internal sleeper 407, a top internal arc groove 408, a top return spring 409, a top positioning rod 1 4010, a top positioning rod 2 4011 and a top tension spring 4012. The top angle plate 401 is fixedly installed on the side wall of the square tube frame 201 on the left and right sides, and the top guide rod 402 is fixedly installed between the left and right top angle plates 401 on the top and bottom sides, and the specifications are the same as those of the bottom guide rod 303. The top external pressure block 403 is fixedly installed on the outer periphery of the upper and lower top guide rods 402 on the left and right sides, and the top external sleeper 404 is fixedly installed on the bottom of the top external pressure block 403. The top external arc groove 405 is opened at the lower end of a side surface close to the left and right top external sleepers 404. The top internal pressure block 406 is slidably installed on the outer periphery of the upper and lower top guide rods 402 on the left and right sides, and is located Between the left and right top external pressure blocks 403, the top inner sleeper 407 is fixedly installed at the bottom of the top inner pressure block 406, the top inner arc groove 408 is symmetrically opened at both ends of the bottom of the top inner sleeper 407, the top return spring 409 is sleeved on the outer periphery of the top guide rod 402 and fixedly installed between the top external pressure block 403 and the top inner pressure block 406, the top positioning rod 1 4010 is fixedly installed on the top of the top angle plate 401, and the top positioning rod 2 4011 is fixedly installed on the top external pressure block 403. At the top of block 403, the top tension spring 4012 is fixedly installed between the top positioning rod 1 4010 and the top positioning rod 2 4011. The position and specifications of the top external pressure block 403 are the same as those of the bottom external pressure block 304, the position and specifications of the top internal pressure block 406 are the same as those of the bottom internal pressure block 307, the specifications of the top external arc groove 405 and the top internal arc groove 408 are compatible with the specifications of the outer wall of the heat exchanger pipe fittings, and the specifications of the bottom external arc groove 306 and the bottom internal arc groove 309 are compatible with the specifications of the outer wall of the heat exchanger pipe fittings.

[0038] Specifically, by moving the bottom outer arc groove 306 and the bottom inner arc groove 309 upward, the three heat exchanger pipes located inside the three positioning arc grooves 2082 are lifted upward until the top of the outer wall of the heat exchanger pipe contacts the inner wall of the top outer arc groove 405 and the top inner arc groove 408 respectively. At this time, the left and right push heads 3018 just move to the sides of the left and right top outer sleepers 404, limiting the left and right top outer sleepers 404, so that the left and right top outer sleepers 404 cannot move outward. Afterwards, as the output rods of the front and rear lifting cylinders 3012 continue to retract, and drive the front and rear lifting seats 3011 to continue to move upward, at this time, the two buffer springs 3017 are compressed and stored, and the lifting seat 3011 slides upward along the outer wall of the lifting rod 3010, and continues to drive the left and right extrusion vertical plates 3013 and the wedge surface 3014 to move. The left and right wedge surfaces 3014 generate a centering force on the left and right guide wheels 3016, causing the left and right guide wheels 3016 to move in opposite directions at a constant speed, and Under the connection action of the left and right L-shaped lifting arms 3015, the left and right bottom outer pressure blocks 304 are squeezed toward the middle, and the left and right top outer pressure blocks 403 are squeezed synchronously by the left and right bottom outer pressure blocks 304 and the left and right pushing heads 3018. The two bottom outer pressure blocks 304 are squeezed toward the middle and the left and right bottom inner pressure blocks 307 are driven toward the middle by the left and right bottom return springs 3021, thereby causing the bottom outer arc grooves 306 of the left and right bottom outer sleepers 305 and the bottom inner arc grooves 309 of the left and right bottom inner sleepers 308 to move toward the middle, squeezing the lower part of the outer wall of the heat exchanger pipe fitting. At the same time, the left and right top outer pressure blocks 403 are squeezed toward the middle by the left and right top return springs 409, causing the top outer arc grooves 405 of the left and right top outer sleepers 404 and the top inner arc grooves 408 of the left and right top inner sleepers 407 to squeeze the upper part of the outer wall of the heat exchanger pipe fitting, thereby simultaneously positioning the three heat exchanger pipe fittings, and achieving high processing stability.

[0039] When the tapping mechanism of a heat exchanger pipe fitting of this scheme is working, the heat exchanger pipe fitting is first transported to the left end of the top of the front and rear two sleeper rails 208 at intervals through the conveying equipment, so that the heat exchanger pipe fitting is supported on the top of the front and rear two pre-storage grooves 2081, and the heat exchanger pipe fitting is prevented from rolling to the right by the inclined surface at the right end of the pre-storage groove 2081. Then, the output rod of the lifting cylinder 206 pushes the shift block 207 downward to move, so that the shift block 207 moves down to the third position from the rightmost end of the top of the pre-storage groove 2081. The left side of the heat exchanger pipe, then, the output rod of the push cylinder 203 retracts, and drives the translation plate 205 to move along the front and rear two polished rods 209 toward the push cylinder 203 through the drag plate 204. At this time, the translation plate 205 drives the shift block 207 to move together under the connection action of the lifting cylinder 206, and shifts the three heat exchanger pipes at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipes roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves in turn. Inside 2082, the output rod of the horizontal push cylinder 203 stops moving. At this time, the three positioning arc grooves 2082 respectively limit the three heat exchanger pipes to prevent the three heat exchanger pipes from continuing to roll. Then, the conveying equipment continues to transport the three conveying equipment to the top of the front and rear pre-storage grooves 2081 for processing. At the same time, the output rod of the lifting cylinder 206 drives the shift block 207 to move upward. Then, the output rod of the horizontal push cylinder 203 extends through the drag plate 204 to push the translation plate 205 moves along the front and rear polished rods 209 in a direction away from the horizontal push cylinder 203, and drives the shift block 207 to move together through the lifting cylinder 206. Since the output rod of the lifting cylinder 206 drives the shift block 207 to move upward, when the shift block 207 moves in a direction away from the horizontal push cylinder 203, the bottom of the shift block 207 will not contact the top of the heat exchanger pipe at the top of the pre-storage tank 2081, and thus will not cause the heat exchanger pipe at the top of the pre-storage tank 2081 to roll in the opposite direction.

[0040] After the three heat exchanger pipes enter the three positioning arc grooves 2082, the output rods of the front and rear two lifting cylinders 3012 retract, pushing the front and rear two lifting seats 3011 to move upward, and further under the connection action of the buffer spring 3017, the lifting rod 3010 moves upward, and drives the aluminum profile frame 301, the bottom angle plate 302, the bottom guide rod 303, the bottom outer pressure block 304, the bottom outer sleeper 305, the bottom outer arc groove 306, the bottom inner pressure block 307, the bottom inner sleeper 308, the bottom inner arc groove 309, the extrusion vertical plate 3013, the wedge surface 3014, the L-shaped lifting arm 3015, the guide wheel 3016 and the push head 3018 to move upward. The top outer arc groove 306 and the bottom inner arc groove 309 move upwards, lifting the three heat exchanger pipes located inside the three positioning arc grooves 2082 until the top of the outer wall of the heat exchanger pipe contacts the inner wall of the top outer arc groove 405 and the top inner arc groove 408 respectively. At this time, the left and right push heads 3018 just move to the two sides of the left and right top outer sleepers 404, limiting the left and right top outer sleepers 404 so that the left and right top outer sleepers 404 cannot move outwards. Afterwards, as the output rods of the front and rear lifting cylinders 3012 continue to retract and drive the front and rear lifting seats 3011 to continue to move upwards, the two buffer springs 3017 are compressed and stored, and the lifting The seat 3011 slides upward along the outer wall of the lifting rod 3010, and continues to drive the left and right extrusion vertical plates 3013 and the wedge surface 3014 to move. The left and right wedge surfaces 3014 generate a centering force on the left and right guide wheels 3016, so that the left and right guide wheels 3016 move in opposite directions at a constant speed, and under the connection of the left and right L-shaped lifting arms 3015, the left and right bottom external pressure blocks 304 are squeezed toward the middle. The left and right top external pressure blocks 403 are squeezed synchronously by the left and right bottom external pressure blocks 304 and the left and right push heads 3018. The two bottom external pressure blocks 304 are squeezed toward the middle and the left and right bottom internal pressure blocks 307 are driven toward the middle by the left and right bottom return springs 3021. The left and right top outer pressure blocks 403 move toward the middle, thereby causing the bottom outer arc grooves 306 of the left and right bottom outer sleepers 305 and the bottom inner arc grooves 309 of the left and right bottom inner sleepers 308 to move toward the middle, squeezing the lower part of the outer wall of the heat exchanger pipe fitting. At the same time, the left and right top outer pressure blocks 403 squeeze the left and right top inner pressure blocks 406 toward the middle through the left and right top return springs 409, so that the top outer arc grooves 405 of the left and right top outer sleepers 404 and the top inner arc grooves 408 of the left and right top inner sleepers 407 squeeze the upper part of the outer wall of the heat exchanger pipe fitting, thereby simultaneously positioning the three heat exchanger pipe fittings. Afterwards, the front and rear three-axis tapping machines 500 tap the front and rear pipe openings of the three heat exchanger pipe fittings.

[0041] After the tapping is completed, the output rods of the front and rear two lifting cylinders 3012 continue to extend, pushing the front and rear two lifting seats 3011 to move downward, releasing the lifting and positioning of the three heat exchanger pipes, and the three heat exchanger pipes fall back into the three positioning arc grooves 2082. Then, the output rod of the lifting cylinder 206 pushes the shift block 207 downward to move, so that the shift block 207 moves down to the left side of the third heat exchanger pipe located at the rightmost end of the top of the pre-stored groove 2081. Subsequently, the output rod of the horizontal push cylinder 203 retracts and drives the translation plate 205 to move along the front and rear two polished rods 209 toward the direction close to the horizontal push cylinder 203 through the drag plate 204. At this time, the translation plate 205 is connected to the lifting cylinder 206. Use the lower drive to move the shift block 207 together, and shift the three heat exchanger pipe fittings located at the rightmost end of the top of the pre-storage groove 2081 to the right. The heat exchanger pipe fittings roll along the top surface of the pre-storage groove 2081 and enter the three positioning arc grooves 2082 in turn, and push the heat exchanger pipe fittings that have been tapped in the previous step to the right, and push the three processed heat exchanger pipe fittings to the top of the inclined guide surface 2083. Finally, roll to the right along the top of the inclined guide surface 2083 to complete the unloading after tapping, and continue to repeat the above steps, so that the tapping mechanism can tap multiple heat exchanger pipe fittings at one time, and further realize the automatic loading of heat exchanger pipe fittings and the automatic unloading after tapping, with a high degree of automation and high processing efficiency.

[0042] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A heat exchanger pipe tapping mechanism, characterized in that: include: Profile rack (100); A pick-and-place unit (200) is fixedly mounted on the top of the profile rack (100) and is used for automatically loading and unloading heat exchanger pipes; The lifting unit (300) is fixedly arranged on the top of the profile rack (100) and located at the bottom of the pick-and-place unit (200). The lifting unit (300) is used to lift and support the heat exchanger pipe fittings. The lifting unit (300) includes: An aluminum profile frame (301) located on top of the profile rack (100); Bottom angle plates (302) are fixedly mounted on both front ends and both rear ends of the aluminum profile frame (301); Bottom guide rods (303) are fixedly mounted between the left and right bottom angle plates (302) and are distributed vertically. The bottom outer pressure block (304) is slidably mounted on the periphery of the upper and lower bottom guide rods (303) in a left-right distributed manner; Bottom outer sleepers (305) are fixedly mounted on the tops of the two bottom outer pressing blocks (304); A bottom outer arc groove (306) is provided at the top of one end where the two bottom outer sleepers (305) are close to each other; The bottom inner pressure block (307) is slidably mounted on the periphery of the upper and lower bottom guide rods (303) and is located between the left and right bottom outer pressure blocks (304); Bottom inner sleepers (308) are fixedly mounted on the tops of the two bottom inner pressure blocks (307); The bottom inner arc groove (309) is symmetrically distributed and opened at the top left corner and the top right corner of the bottom inner sleeper (308), and the specifications of the bottom inner arc groove (309) correspond to the specifications of the bottom outer arc groove (306); The lifting unit (300) further includes: Lifting rods (3010) are fixedly mounted on the left and right ends of the bottom of the aluminum profile frame (301) in a front-to-back distribution, and there are four of them in total. The four lifting rods (3010) slide through the interior of the profile frame (100); A lifting seat (3011) is slidably mounted on the lower portion of the outer wall of the left and right lifting rods (3010); The lifting cylinder (3012) is fixedly mounted on the top of the profile frame (100) in a front-to-back distribution, and its output rod movably passes through the interior of the profile frame (100); Extrusion vertical plates (3013) are fixedly mounted on the sides of the lifting seat (3011) on the left and right sides; Wedge surfaces (3014) are provided on upper portions of opposite surfaces of the left and right extrusion vertical plates (3013); L-shaped lifting arms (3015) are symmetrically distributed and fixedly mounted on the outer surfaces of the two bottom outer pressing blocks (304); A guide wheel (3016) is rotatably mounted on the L-shaped lifting arm (3015) via an axle pin and is located at an end of the L-shaped lifting arm (3015) away from the bottom outer pressure block (304). The position of the guide wheel (3016) corresponds to the position of the wedge surface (3014); A buffer spring (3017) is sleeved around the outer periphery of the lifting rod (3010) and fixedly installed between the bottom of the profile frame (100) and the top of the lifting seat (3011); The lifting unit (300) further includes: A pusher head (3018) is fixedly mounted on the opposite back surfaces of the left and right bottom outer pressure blocks (304) and extends to the top of the bottom outer sleeper (305); A U-shaped groove (3019) is provided on the top of the pusher head (3018), wherein the inner diameter of the U-shaped groove (3019) is larger than the outer diameter of the top guide rod (402); The lifting unit (300) further includes: The bottom return spring (3021) is sleeved on the periphery of the top guide rod (402) and fixedly installed between the bottom outer pressure block (304) and the bottom inner pressure block (307); A bottom positioning rod (3022) is fixedly mounted on the outer surface of the bottom angle plate (302); The second bottom positioning rod (3023) is fixedly mounted on a side of the bottom outer pressure block (304) away from the aluminum profile frame (301), and the second bottom positioning rod (3023) is on the same side as the first bottom positioning rod (3022); A bottom tension spring (3024) is fixedly installed between the bottom positioning rod 1 (3022) and the bottom positioning rod 2 (3023); The positioning unit (400) is fixedly arranged on the top of the profile rack (100) in a front-to-back distribution and is located between the bottom of the pick-and-place unit (200) and the top of the lifting unit (300). The positioning unit (400) and the lifting unit (300) position the heat exchanger pipe. The positioning unit (400) includes: Top angle plates (401) are fixedly mounted on the side walls of the square tube frame (201) on the left and right sides; The top guide rod (402) is fixedly installed between the left and right top angle plates (401) and has the same specifications as the bottom guide rod (303); Top external pressure blocks (403) are fixedly mounted on the periphery of the upper and lower top guide rods (402) on the left and right sides; A top outer sleeper (404) is fixedly mounted on the bottom of the top outer pressing block (403); A top outer arc groove (405) is provided at the lower end of a side surface close to the left and right top outer sleepers (404); The top inner pressure block (406) is slidably mounted on the periphery of the upper and lower top guide rods (402) and is located between the left and right top outer pressure blocks (403); A top inner sleeper (407) is fixedly mounted on the bottom portion of the top inner pressing block (406); The top inner arc groove (408) is symmetrically opened at both ends of the bottom of the top inner sleeper (407); The three-axis tapping machine (500) is symmetrically arranged on the top of the profile frame (100).

2. A heat exchanger pipe tapping mechanism according to claim 1, characterized in that: The pick-and-place unit (200) comprises: A square tube frame (201) is fixedly mounted on the top of the profile frame (100); A connecting plate (202) is fixedly mounted on the end of the square tube frame (201); A horizontal push cylinder (203) is fixedly mounted on one end of the square tube frame (201) away from the connecting plate (202); A drag plate (204) is fixedly mounted on the end of the output rod of the horizontal push cylinder (203); A translation plate (205) is fixedly mounted on one end of the drag plate (204) away from the push cylinder (203); A lifting cylinder (206) is fixedly mounted on a side of the translation plate (205) away from the drag plate (204); A shift block (207) is fixedly mounted on the bottom of the output rod of the lifting cylinder (206); Sleeper rails (208) are fixedly mounted on the top of the profile frame (100) in a front-to-back distribution; The polished rods (209) are fixedly mounted on the right end of the connecting plate (202) in a front-to-rear distribution, and the translation plate (205) is slidably mounted on the outer walls of the front and rear polished rods (209).

3. A heat exchanger pipe tapping mechanism according to claim 2, characterized in that: The positioning unit (400) further includes: A top return spring (409) is sleeved around the outer periphery of the top guide rod (402) and fixedly installed between the top outer pressure block (403) and the top inner pressure block (406); A top positioning rod (4010) is fixedly mounted on the top of the top angle plate (401); A second top positioning rod (4011) is fixedly mounted on the top of the top outer pressure block (403); The top tension spring (4012) is fixedly installed between the top positioning rod 1 (4010) and the top positioning rod 2 (4011).

4. A heat exchanger pipe tapping mechanism according to claim 3, characterized in that: The position and specifications of the top external pressure block (403) are the same as those of the bottom external pressure block (304); the position and specifications of the top internal pressure block (406) are the same as those of the bottom internal pressure block (307); the specifications of the top external arc groove (405) and the top internal arc groove (408) are compatible with the specifications of the outer wall of the heat exchanger pipe fitting; and the specifications of the bottom external arc groove (306) and the bottom internal arc groove (309) are compatible with the specifications of the outer wall of the heat exchanger pipe fitting.

5. A heat exchanger pipe tapping mechanism according to claim 4, characterized in that: A pre-storage groove (2081) is provided at the left end of the top of the sleeper rail (208), three positioning arc grooves (2082) equidistantly distributed on the left and right sides are provided in the middle area of the top of the sleeper rail (208), the specifications of the positioning arc grooves (2082) are compatible with the specifications of the outer wall of the heat exchanger pipe, and an inclined guide surface (2083) is provided at the right end of the top of the sleeper rail (208).

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