Automatic tube threading machine for heat exchanger tube bundle

Abstract

The application discloses a kind of automatic pipe threading machine for heat exchanger tube bundle, it is related to heat exchanger pipe threading technical field, including base, pipe conveying mechanism and positioning mechanism, the pipe conveying mechanism is used to transport vertical heat exchange tube one by one, the positioning mechanism is used to vertically position baffle assembly, further include pipe clamp take delivery mechanism and obstruction detection mechanism, the pipe clamp take delivery mechanism includes clamping mechanism and drive mechanism, the obstruction detection mechanism includes blocking frame and longitudinal pushing mechanism.The application is driven by drive mechanism, drives vertical clamping heat exchange tube to reach the position plate hole of baffle assembly above, then release heat exchange tube, so that heat exchange tube relies on gravity and falls automatically and is inserted into baffle assembly, compared with transverse pipe threading heat exchange tube, without full range of pipe pushing, and can reduce the bending or deviation caused by the weight of pipe material when horizontally threading pipe, reduce pipe threading resistance, improve pipe threading efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchanger pipe penetrating, in particular to an automatic pipe penetrating machine for heat exchanger tube bundle. BACKGROUND

[0002] A heat exchanger is a device for transferring part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. The heat exchanger is usually composed of many pipes which need to be fixed and form flow passages by penetrating the baffle plate to improve heat exchange efficiency. The function of the pipe penetrating machine is to accurately penetrate the pipes through the holes on the baffle plate.

[0003] The existing heat exchanger pipe penetrating machine generally includes a support frame for positioning and supporting the baffle plate and a transmission mechanism for pushing the heat exchange pipe. During the penetration, the heat exchange pipe is transported to the transmission mechanism by the feeding mechanism, and the heat exchange pipe is horizontally erected. The heat exchange pipe is horizontally aligned with the corresponding plate hole according to the guide rail distributed in a certain coordinate system, and then the transmission mechanism drives the heat exchange pipe to move horizontally through the distributed plate hole.

[0004] The existing heat exchanger pipe penetrating machine has the following deficiencies: the existing heat exchanger pipe penetrating machine penetrates the heat exchange pipe horizontally through the plate hole on the distributed baffle plate, but the heat exchange pipe may be locally bent due to its own weight or insufficient guidance during horizontal pipe penetrating, resulting in pipe penetrating failure. When penetrating horizontally, the weight of the pipe body mainly extrudes the bottom contact plate hole wall, and the pipe penetrating resistance will be larger. The horizontal penetration is easy to cause serious wear at the local position, especially when there are burrs on the plate hole wall or there are small errors in the assembly position size of the baffle plate. The resistance during horizontal penetration will be larger, which affects the pipe penetrating efficiency. And the heat exchange pipe needs to be continuously powered during the horizontal pipe penetrating process. Only after one heat exchange pipe is completely pushed and inserted in place, the next heat exchange pipe can be transported and inserted, which also affects the pipe penetrating efficiency. SUMMARY

[0005] The present application aims to provide an automatic pipe penetrating machine for heat exchanger tube bundle to solve the technical problem of low pipe penetrating efficiency of the heat exchanger pipe penetrating machine in the prior art.

[0006] The technical problem solved by the present application can be achieved by the following technical scheme:

[0007] An automatic pipe penetrating machine for heat exchanger tube bundle, comprising a machine base, a pipe feeding mechanism and a positioning mechanism, the pipe feeding mechanism is used to transport heat exchange pipes placed vertically one by one, and the positioning mechanism is used to vertically position the baffle plate assembly, further comprising:

[0008] The pipe clamping and placing mechanism comprises a clamping mechanism and a driving mechanism, the clamping mechanism is used for clamping the heat exchange pipe on the pipe conveying mechanism, the driving mechanism drives the clamping mechanism clamping the heat exchange pipe to move above the corresponding plate hole on the baffle assembly and release the heat exchange pipe.

[0009] The obstacle detection mechanism comprises a blocking frame and a longitudinal pushing mechanism, the blocking frame moves transversely with the clamping mechanism, the blocking frame is used for detecting whether the heat exchange pipe longitudinally penetrating the baffle assembly is stuck, and the longitudinal pushing mechanism is arranged on the blocking frame and is used for pushing down the heat exchange pipe stuck on the baffle assembly to be inserted in place.

[0010] Preferably, the driving mechanism comprises a first electric driving guide rail and a second electric driving guide rail, the first electric driving guide rail is fixedly installed on one side of the base, the second electric driving guide rail is slidably arranged on the first electric driving guide rail, and the second electric driving guide rail and the first electric driving guide rail are perpendicular to each other in the same plane, the clamping mechanism is slidably arranged on one side of the second electric driving guide rail, and the blocking frame is arranged on the other side of the second electric driving guide rail.

[0011] Preferably, the obstacle detection mechanism further comprises a pressure-sensitive switch and a connecting frame, the connecting frame is arranged in parallel on one side of the blocking frame, and the connecting frame is fixedly connected with the second electric driving guide rail, a flexible extension member is transversely connected between the connecting frame and the blocking frame, and the pressure-sensitive switch is fixedly installed on one side of the blocking frame close to the connecting frame and is used for controlling the operation of the longitudinal pushing mechanism.

[0012] Preferably, the longitudinal pushing mechanism comprises a driving motor, a plurality of pushing rotating columns and a synchronous mechanism, the pushing rotating columns are longitudinally and equidistantly distributed on the inner side of the blocking frame, each pushing rotating column is rotatably connected with the blocking frame through a rotating shaft, all the pushing rotating columns are synchronously rotated through the synchronous mechanism, the driving motor is fixedly installed on the outer wall of the blocking frame, one of the pushing rotating columns is fixedly connected with the main shaft of the driving motor, and the driving motor is electrically connected with the pressure-sensitive switch.

[0013] Preferably, the synchronous mechanism comprises a synchronous wheel and a synchronous belt, one end of each pushing rotating column is coaxially fixedly connected with a synchronous wheel, and all the synchronous wheels are connected with the same synchronous belt.

[0014] Preferably, an impact plate is arranged between the connecting frame and the blocking frame and is in contact with the pushing rotating column, guide rods are fixedly connected to the two sides of the blocking frame and transversely penetrate the edges of the impact plate, a return spring is connected between the impact plate and the guide rod, the two ends of one of the pushing rotating columns are provided with a pushing mechanism for pushing the impact plate, each pushing rotating column is a hollow structure and is made of elastic metal.

[0015] Preferably, the pushing mechanism comprises a linkage gear, a reduction gear and a pushing rod, the linkage gear is coaxially fixedly connected with one of the push rotating columns, the reduction gear is rotatably connected on the outer wall of the blocking frame through a rotating shaft, and the reduction gear is engaged with the linkage gear, one end of the pushing rod is coaxially fixedly connected with the reduction gear, and the pushing rod is vertically distributed with the rotating shaft of the reduction gear, and the impact plate is provided with a protrusion matched with the end of the pushing rod.

[0016] Preferably, the clamping mechanism comprises a sliding frame and a clamping block, the sliding frame is slidingly arranged on the second electrically driven guide rail, and the two ends of the sliding frame are symmetrically fixedly installed with pneumatic telescopic rods, and the clamping block is provided with two clamping blocks which are fixedly arranged at the telescopic ends of the corresponding pneumatic telescopic rods.

[0017] Preferably, the pipe feeding mechanism comprises a support seat, a stepping motor, a fixed supporting plate and a driving rotating column, the support seat is arranged on the machine base, the stepping motor is fixedly installed on the support seat, the fixed supporting plate is fixedly installed on the support seat, and the main shaft of the stepping motor penetrates through the fixed supporting plate; the driving rotating column is arranged on the fixed supporting plate and fixedly connected with the end of the main shaft of the stepping motor, a plurality of clamping grooves matched with the heat exchange pipes are equidistantly arranged on the outer wall of the driving rotating column, a limiting ring fixedly connected with the fixed supporting plate is arranged on the outer part of the driving rotating column, and a material taking opening is arranged on the side of the limiting ring close to the clamping mechanism.

[0018] Preferably, the positioning mechanism comprises a supporting ring and a positioning clamping plate, the supporting ring is fixedly arranged on the machine base through a support, a plurality of positioning clamping plates are equidistantly arranged on the outer circle of the supporting ring, and a plurality of electric guide rails are equidistantly arranged on the machine base, and each positioning clamping plate is slidingly connected on the corresponding electric guide rail.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The heat exchange pipe is clamped by the clamping mechanism and is driven by the driving mechanism to reach the position above the hole of the baffle plate assembly, and then the heat exchange pipe is released to automatically fall into the baffle plate assembly, compared with the horizontal heat exchange pipe, the heat exchange pipe does not need to be pushed all the way, and the bending or deviation caused by the weight of the pipe material during horizontal pipe installation can be reduced, the alignment accuracy of the baffle plate hole and the heat exchange pipe is improved, the gravity distribution of the contact surface of the heat exchange pipe and the baffle plate hole is relatively uniform, the local friction concentration is reduced, the pipe installation resistance is reduced, and the pipe installation efficiency is improved.

[0021] 2,When the drive mechanism drives the clamping mechanism clamping the heat exchange pipe to move to the corresponding plate hole position again, the blocking frame first passes the position where the heat exchange pipe has been inserted, if the previous heat exchange pipe is stuck and not completely inserted into place, the blocking frame is hindered, thereby extruding the pressure sensitive switch, the pressure sensitive switch drives the drive motor on the blocking frame to drive the push column to rotate, and the stuck heat exchange pipe is continuously pushed down, then the next heat exchange pipe is continuously inserted, and all heat exchange pipes can be effectively inserted into place.

[0022] 3,When the drive motor drives the push column to run and push the stuck heat exchange pipe to continue to insert, the push column is also driven by the linkage gear and the reduction gear to rotate the push rod, the push rod continuously pushes and impacts the impact plate, and the impact plate is reset by the reset spring each time, thereby making the push column vibrate and transmitting the vibration to the heat exchange pipe, and the heat exchange pipe is further assisted to fall and insert into place by the vibration. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the overall structure schematic diagram of the present application;

[0024] Figure 2 is the structure schematic diagram of the relative position distribution of the limiting ring and the fixed supporting plate in the present application;

[0025] Figure 3 is the structure schematic diagram of the cooperation and connection of the drive column and the limiting ring in the present application;

[0026] Figure 4 is the structure schematic diagram of the relative position distribution of the positioning clamp plate and the supporting ring in the present application;

[0027] Figure 5 is the structure schematic diagram of the connection of the clamping block and the second electric drive mechanism in the present application;

[0028] Figure 6 is the structure schematic diagram of the connection of the blocking frame and the second electric drive mechanism in the present application;

[0029] Figure 7 is Figure 6 is the enlarged structure schematic diagram of A in the present application;

[0030] Figure 8 is the structure schematic diagram of the cooperation and connection of the connecting frame and the blocking frame in the present application;

[0031] Figure 9 is Figure 8 is the enlarged structure schematic diagram of B in the present application;

[0032] Figure 10 is the structure schematic diagram of the cooperation and connection of all the push columns in the present application;

[0033] Figure 11 Figure 1 is a schematic diagram of the structure of the universal ball and the impact plate in the application;

[0034] Figure 12 Figure 5 is a schematic diagram of the state when the pushing rotating column contacts the heat exchange pipe clamped on the baffle plate assembly in the application.

[0035] Legend of reference signs:

[0036] 1, base; 2, support seat; 3, fixed support plate; 4, limiting ring; 5, heat exchange pipe; 6, first electric drive guide rail; 7, second electric drive guide rail; 8, positioning clamp plate; 9, electric guide rail; 10, baffle plate assembly; 11, support ring; 12, material taking port; 13, clamping block; 14, pneumatic telescopic rod; 15, sliding frame; 16, connecting frame; 17, drive motor; 18, elastic telescopic member; 19, pushing rotating column; 20, linkage gear; 21, pushing jacking rod; 22, protruding block; 23, speed reduction gear; 24, pressure sensing switch; 25, guide rod; 26, return spring; 27, synchronous wheel; 28, synchronous belt; 29, universal ball; 30, stepping motor; 31, drive rotating column; 32, clamping groove; 33, blocking frame; 34, impact plate. DETAILED DESCRIPTION

[0037] The specific embodiments of the application are described in detail below, but it should be understood that the protection scope of the application is not limited by the specific embodiments.

[0038] As shown in Figures 1-12 Figure 1, an automatic pipe threading machine for heat exchanger tube bundle, which is used for working on heat exchangers with medium and short tube bundles, comprises a base 1, a pipe feeding mechanism and a positioning mechanism, the pipe feeding mechanism is arranged on one side of the base 1 and is used for feeding vertical heat exchange pipes 5 one by one, and the positioning mechanism is arranged on the other side of the base 1 and is used for vertically positioning and fixing a baffle plate assembly 10 to be threaded, the baffle plate assembly 10 has been previously processed with plate holes for threading, it should be noted that the baffle plate assembly 10 comprises a plurality of longitudinally distributed baffle plates which are fixedly connected together through struts between adjacent baffle plates to form an integral whole; the pipe threading machine further comprises a pipe clamping and throwing mechanism and an obstruction detection mechanism, the pipe clamping and throwing mechanism comprises a clamping mechanism and a drive mechanism, the clamping mechanism is used for clamping the heat exchange pipe 5 on the pipe feeding mechanism, and the drive mechanism controls the positioning of the clamping mechanism based on a control system, controls the clamping mechanism to move the heat exchange pipe 5 to above the corresponding plate hole on the baffle plate assembly 10, and then controls the clamping mechanism to release, so as to release the heat exchange pipe 5, the heat exchange pipe 5 is automatically threaded through the baffle plate assembly 10 by gravity without being pushed all the way, at this time, the drive mechanism can drive the clamping mechanism to return to the position of the pipe feeding mechanism to take the next heat exchange pipe 5, thereby improving the pipe threading efficiency;

[0039] It should be noted that the above control system marks the coordinates of the baffle plate assembly 10 based on the plane coordinate system algorithm, and the heat exchange pipe 5 is put into the baffle plate assembly 10 according to the order of the coordinates of each baffle plate hole; this technical means belongs to the prior art, and will not be described in detail here;

[0040] The blocking detection mechanism includes a blocking frame 33 and a longitudinal pushing mechanism. The blocking frame 33 moves transversely with the clamping mechanism, and is used to detect whether the heat exchange pipe 5 longitudinally inserted into the baffle plate assembly 10 is stuck. The longitudinal pushing mechanism is arranged on the blocking frame 33 and is used to push the heat exchange pipe 5 stuck on the baffle plate assembly 10 downward to be inserted into place.

[0041] In some specific embodiments, the driving mechanism includes a first electric driving guide rail 6 and a second electric driving guide rail 7. The first electric driving guide rail 6 is fixedly installed on one side of the base 1 through a support. The second electric driving guide rail 7 is slidably arranged on the first electric driving guide rail 6 through a sliding seat, and the second electric driving guide rail 7 and the first electric driving guide rail 6 are perpendicular to each other in the same plane. The second electric driving guide rail 7 can move transversely as a whole along the first electric driving guide rail 6. The clamping mechanism is slidably arranged on one side of the second electric driving guide rail 7 and can move transversely along the second electric driving guide rail 7. The blocking frame 33 is arranged on the other side of the second electric driving guide rail 7.

[0042] It should be noted that when the heat exchange pipe 5 is vertically inserted into the baffle plate assembly 10 and inserted into place, the top of the heat exchange pipe 5 is lower than the height of the bottom of the blocking frame 33.

[0043] In some specific embodiments, as shown in Figure 6 The blocking detection mechanism further includes a pressure-sensitive switch 24 and a connecting frame 16. The connecting frame 16 is arranged in parallel on one side of the blocking frame 33, between the second electric driving guide rail 7 and the blocking frame 33, and is fixedly connected with the outer wall of the second electric driving guide rail 7 by bolting or welding. Elastic expansion members 18 are transversely connected between the connecting frame 16 and the blocking frame 33. The elastic expansion members 18 include expansion rods connected with the connecting frame 16 and the blocking frame 33, and compressible springs sleeved outside the expansion rods. Here, the elastic expansion members 18 can be arranged in four groups and distributed at the corners of the connecting frame 16 and the blocking frame 33. The pressure-sensitive switch 24 is fixedly installed on one side of the blocking frame 33 close to the connecting frame 16, and is used to control the operation of the longitudinal pushing mechanism. When the elastic expansion members 18 are in a normal state, the pressure-sensitive switch 24 does not contact the connecting frame 16.

[0044] In some specific embodiments, in combination with Figure 6 and Figure 10As shown, the longitudinal pushing mechanism comprises a driving motor 17, pushing rotating columns 19, and a synchronous mechanism, the pushing rotating columns 19 are provided in plurality and are longitudinally equidistantly distributed inside the blocking frame 33, each of the pushing rotating columns 19 is rotationally connected with the blocking frame 33 through a rotating shaft, and all the pushing rotating columns 19 are synchronously rotated through the synchronous mechanism. It is to be noted that the pushing rotating columns 19 are provided with protrusions or anti-skid grooves on the surface to facilitate increasing the frictional force of contact. The driving motor 17 is fixedly installed on the outer wall of the blocking frame 33, and one of the pushing rotating columns 19 is fixedly connected with the main shaft of the driving motor 17. The driving motor 17 is electrically connected with the pressure-sensitive switch 24.

[0045] When the second electrically-driven guide rail 7 moves along the first electrically-driven guide rail 6 with the clamping mechanism clamping the heat exchange pipe 5 to approach the corresponding baffle hole position of the baffle assembly 10, if the last launched heat exchange pipe 5 is stuck in the baffle hole due to the size of the baffle hole or burrs and cannot completely fall, at this time, the blocking frame 33 moving together with the second electrically-driven guide rail 7 will touch the stuck heat exchange pipe 5, and the blocking frame 33 contacts the heat exchange pipe 5 through the distributed pushing rotating columns 19. At this time, due to the blocking of the blocking frame 33, the second electrically-driven guide rail 7 continuously moving along the first electrically-driven guide rail 6 will cause the elastic expansion piece 18 between the connecting frame 16 and the blocking frame 33 to be compressed, and the distance between the two is reduced. Thus, the pressure-sensitive switch 24 is squeezed, thereby generating a signal feedback. The control system receives the signal and sends a control instruction to control the movement of the driving motor 17. The driving motor 17 drives the corresponding pushing rotating column 19 to rotate. The corresponding pushing rotating column 19 drives all the other pushing rotating columns 19 to rotate through the synchronous mechanism. Thus, the distributed pushing rotating columns 19 can exert a downward pushing force on the stuck heat exchange pipe 5 to assist it to be inserted into place.

[0046] It is to be noted that when the pressure-sensitive switch 24 is squeezed, the feedback signal thereof will be collected by the control system, and the control system will temporarily stop the driving mechanism. Only when the obstructed heat exchange pipe 5 is inserted into place and the obstruction is removed, the control system will continue to control the driving mechanism to operate, thereby ensuring that the clamped heat exchange pipe 5 moves to the corresponding point position. Each heat exchange pipe 5 from the starting position of taking out to the set point position is one complete action cycle.

[0047] In some specific embodiments, reference is made to Figure 10 As shown, the synchronous mechanism comprises a synchronous wheel 27 and a synchronous belt 28. One end of each of the pushing rotating columns 19 is coaxially fixedly connected with a synchronous wheel 27. All the synchronous wheels 27 are cooperatively connected with the same synchronous belt 28. Thus, as long as one of the pushing rotating columns 19 rotates, it can drive the synchronous belt 28 to operate through the corresponding synchronous wheel 27, thereby causing all the synchronous wheels 27 and the corresponding pushing rotating columns 19 to rotate.

[0048] In some specific implementation schemes, to facilitate further assistance in inserting the stuck heat exchange tube 5 into place; refer to Figures 6-8 As shown, an impact plate 34 is provided between the connecting frame 16 and the baffle 33, and the impact plate 34 contacts the push rotating column 19. Guide rods 25 are fixedly connected to both sides of the baffle 33, and the guide rods 25 pass laterally through the edge of the impact plate 34. The impact plate 34 can slide laterally along the guide rods 25. A compressible return spring 26 is connected between the impact plate 34 and the guide rods 25. Both ends of one of the push rotating columns 19 are provided with a pushing mechanism for pushing the impact plate 34 to compress the return spring 26. Each push rotating column 19 is a hollow structure and is made of elastic metal.

[0049] Among them, reference Figure 7 As shown, the pushing mechanism includes a linkage gear 20, a reduction gear 23, and a pushing rod 21. The linkage gear 20 is coaxially and fixedly connected to one of the pushing rotating columns 19. The reduction gear 23 is rotatably connected to the outer wall of the baffle frame 33 via a rotating shaft, and the reduction gear 23 meshes with the linkage gear 20. Here, the diameter of the reduction gear 23 is smaller than the diameter of the linkage gear 20, which facilitates high-speed transmission when the linkage gear 20 transmits to the reduction gear 23. The reduction gear 23 is not limited to one, but can be multiple. One end of the pushing rod 21 is coaxially and fixedly connected to the reduction gear 23, and the rotating shafts of the pushing rod 21 and the reduction gear 23 are perpendicularly distributed. The end of the pushing rod 21 is a spherical end. The impact plate 34 is provided with a protrusion 22 near the pushing rod 21 that cooperates with the end of the pushing rod 21. The bottom of the protrusion 22 is basically horizontally flush with the center of the reduction gear 23.

[0050] In the process of pushing the stuck heat exchange pipe 5 down, the corresponding pushing column 19 drives the linkage gear 20 to rotate, which in turn drives the reduction gear 23 to rotate, and the reduction gear 23 drives the push rod 21 to rotate synchronously. When the end of the push rod 21 rotates and contacts the protrusion 22, the push rod 21 can push the protrusion 22 and the impact plate 34 along the guide rod 25 to compress the return spring 26, because the distance between the end of the push rod 21 connected to the reduction gear 23 and the protrusion 22 is smaller than the length of the push rod 21 itself. At this time, the impact plate 34 is separated from the distributed pushing column 19, and when the push rod 21 rotates to the corresponding position, the end of the push rod 21 is separated from the protrusion 22, and the impact plate 34 can reset the impact on the distributed pushing column 19 by the rebound force of the return spring 26. Since the pushing column 19 is a hollow structure and is made of elastic metal, it can vibrate when impacted and facilitate the transmission of vibration to the contacted heat exchange pipe 5, thereby making the heat exchange pipe 5 vibrate. The vibration can change the contact state between the heat exchange pipe 5 and the hole wall from sliding friction to intermittent disengagement, reducing the resistance caused by continuous friction, and cooperating with the gravity and the pushing force of the pushing column 19, thereby facilitating the acceleration of the heat exchange pipe 5 to vertically penetrate into place.

[0051] In some embodiments, as shown in Figure 11 The surface of the impact plate 34 is uniformly distributed with a plurality of universal balls 29, each universal ball 29 comprising a ball shell and a ball body movably embedded in the ball shell, and the ball body is exposed to the outside of the ball shell. The universal ball 29 facilitates the rotation of the pushing column 19 contacting the surface of the impact plate 34, and the universal ball 29 also facilitates the impact of the impact plate 34 on the pushing column 19 to generate vibration.

[0052] In some embodiments, as shown in Figure 5 The clamping mechanism includes a sliding carriage 15 and a clamping block 13. The sliding carriage 15 is slidingly arranged on the second electrically driven guide rail 7, and the two ends of the sliding carriage 15 are symmetrically fixedly installed with pneumatic telescopic rods 14. The clamping block 13 is provided with two blocks, which are fixedly arranged at the telescopic ends of the corresponding pneumatic telescopic rods 14, and the two clamping blocks 13 are symmetrically distributed and are V-shaped clamping bodies. When the heat exchange pipe 5 is at the top between the two clamping blocks 13, the two pneumatic telescopic rods 14 are elongated to drive the two clamping blocks 13 to clamp the heat exchange pipe 5.

[0053] In addition, it should be noted that the clamping block 13 itself has a certain length, and only a slight separation occurs when releasing the heat exchange pipe 5, which can ensure that the heat exchange pipe 5 does not fall over at the moment of releasing the heat exchange pipe 5, thereby facilitating its falling into the hole.

[0054] In some embodiments, as shown in Figure 2 and Figure 3As shown, the feeding mechanism comprises a support seat 2, a stepping motor 30, a fixed support plate 3 and a driving rotating column 31, the support seat 2 is arranged on the base 1, here the support seat 2 can be fixed, or arranged as a seat body which is turned at a certain angle by the motor, the turning function is mainly for facilitating manual loading of the heat exchange pipe 5 at a lower position; the stepping motor 30 is fixedly installed on the support seat 2, the fixed support plate 3 is fixedly installed on the support seat 2 through a support, and a through hole exists in the middle position of the fixed support plate 3, the main shaft of the stepping motor 30 penetrates through the fixed support plate 3; the driving rotating column 31 is arranged on the fixed support plate 3 and fixedly connected with the end of the main shaft of the stepping motor 30, a plurality of clamping grooves 32 matched with the heat exchange pipe 5 are equidistantly arranged on the outer wall of the driving rotating column 31, a limiting ring 4 fixedly connected with the fixed support plate 3 is arranged outside the driving rotating column 31, and a material taking port 12 is arranged on the side of the limiting ring 4 close to the clamping mechanism.

[0055] After each heat exchange pipe 5 is put in, the control system controls the first electric driving guide rail 6 and the second electric driving guide rail 7 to cooperate and operate, so that the clamping mechanism moves above the material taking port 12 of the limiting ring 4, at this time, there is no heat exchange pipe 5 at the material taking port 12, a corresponding sensing switch is arranged on the limiting ring 4 at the position of the material taking port 12 after the two clamping blocks 13 of the clamping mechanism reach above the material taking port 12, for sensing whether the clamping blocks 13 are in place, after detection, the stepping motor 30 drives the driving rotating column 31 to rotate at a certain angle, so that the driving rotating column 31 pushes the distributed heat exchange pipe 5 to move, so that the corresponding heat exchange pipe 5 moves to the position of the material taking port 12, during the process, the top of the corresponding heat exchange pipe 5 is just between the two clamping blocks 13, then the pneumatic telescopic rod 14 drives the clamping blocks 13 to clamp the top of the heat exchange pipe 5, so as to facilitate horizontal movement and taking out, and moving to the corresponding plate hole position for putting in.

[0056] It should be noted that the upper surface layer of the fixed support plate 3 is flush with the upper surface layer of the baffle assembly 10, and the heat exchange pipe 5 stored and placed is supported on the fixed support plate 3, so that the heat exchange pipe 5 can be directly contacted with the corresponding plate hole port position after being translated above the baffle assembly 10, facilitating putting in and inserting.

[0057] In some specific embodiments, reference is made to Figure 4As shown, the positioning mechanism comprises a support ring 11 fixedly arranged on the base 1 by a support, and a plurality of positioning clamping plates 8 which are equidistantly distributed on the outer circle of the support ring 11. A plurality of electric guide rails 9 are also equidistantly distributed on the base 1, and each positioning clamping plate 8 is slidably connected to a corresponding electric guide rail 9. The extension line of each electric guide rail 9 passes below the center of the support ring 11. All the electric guide rails 9 are controlled to operate by a same control switch, so as to facilitate synchronous operation. In addition, the outer diameter of the support ring 11 is smaller than that of the baffle assembly 10.

[0058] After the assembled baffle assembly 10 is placed on the support ring 11, all the electric guide rails 9 are controlled to operate synchronously, so that the circumferentially distributed positioning clamping plates 8 are simultaneously moved to the middle to be clamped, thereby facilitating positioning and fixing of the baffle assembly 10, and facilitating subsequent pipe threading.

[0059] In order to facilitate the understanding of the person skilled in the art to the embodiment of the present scheme, the working principle of the present scheme will be briefly described in combination with specific application scenarios:

[0060] Firstly, after the assembled baffle assembly 10 is placed on the support ring 11, all the electric guide rails 9 are controlled to operate synchronously, so that the circumferentially distributed positioning clamping plates 8 are simultaneously moved to the middle to be clamped, thereby facilitating positioning and fixing of the baffle assembly 10. And the heat exchange pipe 5 to be used is inserted between the driving rotating column 31 and the limiting ring 4.

[0061] Then, the whole pipe threading machine is started to operate, and the corresponding control system controls the first electric drive guide rail 6 and the second electric drive guide rail 7 to cooperate and operate, so that the clamping mechanism moves above the material taking port 12 of the limiting ring 4. At this time, there is no heat exchange pipe 5 at the material taking port 12. After the two clamping blocks 13 of the clamping mechanism reach above the material taking port 12, whether the clamping blocks 13 are in place can be sensed by the inductive switch arranged at the position of the material taking port 12. After detection, the stepping motor 30 drives the driving rotating column 31 to rotate by a certain angle. In this way, the driving rotating column 31 pushes the distributed heat exchange pipes 5 to move, so that the corresponding heat exchange pipe 5 moves to the position of the material taking port 12. During this process, the top of the corresponding heat exchange pipe 5 is just between the two clamping blocks 13. Then, the pneumatic telescopic rod 14 drives the clamping blocks 13 to clamp, so as to fix the top of the heat exchange pipe 5, thereby facilitating horizontal movement and taking out, and driving the heat exchange pipe 5 to move above the corresponding perforated position on the baffle assembly 10. Then, the control system controls the clamping mechanism to loosen, so as to release the heat exchange pipe 5. The heat exchange pipe 5 automatically passes through the baffle assembly 10 by gravity, without the need for full-length pushing.

[0062] Then control the clamping mechanism to reset clamping the next heat exchange pipe 5, and carry out the next position to put into the pipe, while the second electric drive guide rail 7 moves along the first electric drive guide rail 6 with the clamping mechanism clamping the heat exchange pipe 5 to the corresponding baffle hole position of the baffle assembly 10, when the last put into heat exchange pipe 5 is stuck in the process of down through due to the baffle hole diameter size or the existence burr and other problems, cannot completely fall, at this time, the blocking frame 33 moving together with the second electric drive guide rail 7 touches the stuck heat exchange pipe 5, and the blocking frame 33 contacts the heat exchange pipe 5 by the distributed push column 19, and at this time, due to the blocking of the blocking frame 33, the second electric drive guide rail 7 continuously moving along the first electric drive guide rail 6 causes the elastic stretching and contracting member 18 between the connecting frame 16 and the blocking frame 33 to be compressed, and the spacing between the two is smaller, so the pressure sensitive switch 24 is extruded, thereby generating signal feedback, the control system receives the signal, and sends control instructions to control the driving motor 17 to move, the driving motor 17 drives the corresponding push column 19 to rotate, the corresponding push column 19 drives all the push columns 19 through the synchronous mechanism, so that the distributed push column 19 can apply downward pushing force to the stuck heat exchange pipe 5 to assist it to be inserted into position; and after the stuck heat exchange pipe 5 is inserted into position, the blocked driving mechanism can continue to move forward to move the clamped heat exchange pipe 5 to the corresponding baffle hole position for putting into.

[0063] And in the process of rotating and pushing the stuck heat exchange pipe 5 down, the corresponding push column 19 drives the linkage gear 20 to rotate, the linkage gear 20 drives the reduction gear 23 to rotate, the reduction gear 23 drives the push rod 21 to rotate synchronously, when the end of the push rod 21 rotates and contacts the lug 22, since the spacing between the end of the push rod 21 connected with the reduction gear 23 and the lug 22 is smaller than the length of the push rod 21 itself, the push rod 21 can push the lug 22 and the impact plate 34 to move along the guide rod 25 and compress the return spring 26, at this time, the impact plate 34 is separated from the distributed push column 19, when the push rod 21 rotates to the corresponding position, the end of the push rod 21 is separated from the lug 22, the impact plate 34 can reset the impact on the distributed push column 19 by the rebound force of the return spring 26, since the push column 19 is a hollow structure and is made of elastic metal, it can vibrate when impacted, and the vibration can be transmitted to the contacted heat exchange pipe 5, so that the heat exchange pipe 5 vibrates, the vibration can change the contact state between the heat exchange pipe 5 and the baffle hole wall from sliding friction to intermittent separation, reduce the resistance caused by continuous friction, cooperate with the gravity and the pushing force of the push column 19, so as to facilitate the vertical insertion of the heat exchange pipe 5 into position.

[0064] The above disclosure is only a few specific embodiments of the present application, but the embodiments of the present application are not limited to this, any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. An automatic tube threading machine for heat exchanger tube bundles, comprising a machine base (1), a tube feeding mechanism for feeding the vertically positioned heat exchanger tubes (5) one by one, and a positioning mechanism for vertically positioning the baffle plate assembly (10), characterized in that, Also include: Pipe clamping and throwing mechanism, the pipe clamping and throwing mechanism includes clamping mechanism and drive mechanism, the clamping mechanism is used for clamping heat exchange pipe (5) on pipe feeding mechanism, the drive mechanism drives the clamping mechanism that clamps heat exchange pipe (5) to move to the corresponding plate hole on the baffle assembly (10) and releases heat exchange pipe (5); Obstruction detection mechanism, the obstruction detection mechanism includes a blocking frame (33) and a longitudinal pushing mechanism, the blocking frame (33) moves laterally with the clamping mechanism, the blocking frame (33) is used to detect whether the heat exchange pipe (5) longitudinally inserted into the baffle assembly (10) is stuck, and the longitudinal pushing mechanism is arranged on the blocking frame (33), and the longitudinal pushing mechanism is used to push down the heat exchange pipe (5) stuck on the baffle assembly (10) to be inserted into place; The drive mechanism includes a first electric drive guide rail (6) and a second electric drive guide rail (7), the first electric drive guide rail (6) is fixedly installed on one side of the base (1), the second electric drive guide rail (7) is slidably arranged on the first electric drive guide rail (6), and the second electric drive guide rail (7) and the first electric drive guide rail (6) are perpendicular to each other in the same plane, the clamping mechanism is slidably arranged on one side of the second electric drive guide rail (7), and the blocking frame (33) is arranged on the other side of the second electric drive guide rail (7); The obstruction detection mechanism further includes a pressure-sensitive switch (24) and a connecting frame (16), the connecting frame (16) is arranged in parallel on one side of the blocking frame (33), and the connecting frame (16) is fixedly connected with the second electric drive guide rail (7), a flexible extension piece (18) is transversely connected between the connecting frame (16) and the blocking frame (33), and the pressure-sensitive switch (24) is fixedly installed on one side of the blocking frame (33) close to the connecting frame (16), and the pressure-sensitive switch (24) is used to control the operation of the longitudinal pushing mechanism; The longitudinal pushing mechanism includes a drive motor (17), a pushing rotating column (19) and a synchronous mechanism, the pushing rotating column (19) is provided with a plurality of longitudinal equidistant distribution inside the blocking frame (33), each pushing rotating column (19) is rotatably connected with the blocking frame (33) through a rotating shaft, and all the pushing rotating columns (19) are synchronously rotated through the synchronous mechanism, the drive motor (17) is fixedly installed on the outer wall of the blocking frame (33), and one of the pushing rotating columns (19) is fixedly connected with the main shaft of the drive motor (17), and the drive motor (17) is electrically connected with the pressure-sensitive switch (24); A striking plate (34) is arranged between the connecting frame (16) and the blocking frame (33), and the striking plate (34) is in contact with the pushing rotating column (19), guide rods (25) are fixedly connected to both sides of the blocking frame (33), and the guide rods (25) transversely penetrate the edges of the striking plate (34), a return spring (26) is connected between the striking plate (34) and the guide rod (25), and both ends of one of the pushing rotating columns (19) are provided with a pushing mechanism for pushing the striking plate (34), each pushing rotating column (19) is a hollow structure and is made of elastic metal; The pushing mechanism comprises a linkage gear (20), a reduction gear (23) and a pushing rod (21), the linkage gear (20) is coaxially fixedly connected with one of the pushing rotating columns (19), the reduction gear (23) is rotatably connected on the outer wall of the blocking frame (33) through a rotating shaft, and the reduction gear (23) is engaged with the linkage gear (20), one end of the pushing rod (21) is coaxially fixedly connected with the reduction gear (23), and the pushing rod (21) and the rotating shaft of the reduction gear (23) are vertically distributed, and the impact plate (34) is provided with a protrusion (22) matched with the end of the pushing rod (21) at the position close to the pushing rod (21).

2. The automatic tube plugging machine for heat exchanger tube bundle according to claim 1, characterized in that, The synchronous mechanism comprises a synchronous wheel (27) and a synchronous belt (28), one end of each of the pushing rotating columns (19) is coaxially fixedly connected with a synchronous wheel (27), and all the synchronous wheels (27) are matched and connected with the same synchronous belt (28).

3. The automatic tube plugging machine for heat exchanger tube bundle according to claim 1, characterized in that, The clamping mechanism comprises a sliding frame (15) and a clamping block (13), the sliding frame (15) is slidingly arranged on the second electrically-driven guide rail (7), two ends of the sliding frame (15) are symmetrically fixedly provided with pneumatic telescopic rods (14), and the clamping block (13) is provided with two clamping blocks which are fixedly arranged at the telescopic ends of the corresponding pneumatic telescopic rods (14).

4. The automatic tube plugging machine for heat exchanger tube bundle according to claim 1, characterized in that, The pipe feeding mechanism comprises a supporting seat (2), a stepping motor (30), a fixed supporting plate (3) and a driving rotating column (31), the supporting seat (2) is arranged on the machine base (1), the stepping motor (30) is fixedly installed on the supporting seat (2), the fixed supporting plate (3) is fixedly installed on the supporting seat (2), and the main shaft of the stepping motor (30) penetrates through the fixed supporting plate (3); the driving rotating column (31) is arranged on the fixed supporting plate (3) and fixedly connected with the end of the main shaft of the stepping motor (30), a plurality of clamping grooves (32) matched with the heat exchange pipes (5) are equidistantly arranged on the outer wall of the driving rotating column (31) in a circumferential direction, a limiting ring (4) fixedly connected with the fixed supporting plate (3) is arranged on the outer portion of the driving rotating column (31), and a material taking opening (12) is arranged on the side of the limiting ring (4) close to the clamping mechanism.

5. The automatic tube plugging machine for heat exchanger tube bundle according to claim 1, characterized in that, The positioning mechanism comprises a supporting ring (11) and a positioning clamping plate (8), the supporting ring (11) is fixedly arranged on the machine base (1) through a support, a plurality of the positioning clamping plates (8) are equidistantly arranged on the outer circle of the supporting ring (11) in a circumferential direction, and a plurality of electric guide rails (9) are equidistantly arranged on the machine base (1) in a circumferential direction, and each positioning clamping plate (8) is slidingly connected with the corresponding electric guide rail (9).

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