Automatic pipe jacking device of cold drawing machine

Abstract

The invention relates to the technical field of pipe processing, in particular to an automatic pipe jacking device of a cold-drawing machine, which comprises a bearing frame arranged at the end part of a stacking track, a pipe jacking trolley movably erected on the bearing frame, a push rod arranged on the pipe jacking trolley and used for pushing a pipe to move, and two chain wheels rotationally erected on the bearing frame, a chain is arranged between the two chain wheels in a sleeved mode, the pipe jacking trolley is connected to the chain, and a driving motor electrically connected to the control system and coaxially connected to the chain wheels is arranged on the bearing frame. A mounting groove for placing the push rod is vertically formed in the pipe jacking vehicle, two limiting plates are arranged on the push rod, and the two limiting plates are tightly attached to the two opposite outer side walls of the pipe jacking vehicle respectively. The device has the advantage that short-distance movement of the pipes can be conveniently achieved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe processing, and in particular to an automatic pipe jacking device for a cold drawing machine. Background Art

[0002] Cold drawn tube is a tube made by cold drawing process, which mainly includes two steps: pre-drawing and cold drawing. First, the metal material is processed into a rod with a smaller diameter, and then it is further processed into the required tube.

[0003] After the pipe is drawn by the drawing machine, it will be placed on the stockpile track. Since the pipe is long, its overall volume and mass are large. When it needs to be moved a short distance, it is usually lifted by a crane.

[0004] However, pipe lifting not only requires the use of rotating lifting equipment, but also the loading and unloading process is relatively cumbersome, resulting in slow pipe movement efficiency, which is an obvious shortcoming. Summary of the invention

[0005] In order to facilitate the short-distance movement of pipes, the present application provides an automatic pipe jacking device for a cold drawing machine.

[0006] The automatic pipe jacking device of a cold drawing machine provided in the present application adopts the following technical solution: An automatic pipe jacking device for a cold drawing machine comprises a support frame arranged at the end of a stockpiling track, a pipe jacking vehicle movably mounted on the support frame, a push rod for pushing the pipe to move is arranged on the pipe jacking vehicle, two sprockets are rotatably mounted on the support frame, a chain is sleeved between the two sprockets, the pipe jacking vehicle is connected to the chain, and a driving motor electrically connected to a control system and coaxially connected to the sprocket is arranged on the support frame.

[0007] By adopting the above technical solution, the control system starts the drive motor, the output shaft of the drive motor drives the sprocket to rotate, and the chain drives the pipe jacking vehicle to move under the action of the sprocket. The pipe jacking vehicle drives the push rod to support the pipe placed on the stacking track and push it to move. The operation is simple and the transfer efficiency of the pipe is high.

[0008] Optionally, a mounting groove for placing a push rod is vertically opened on the pipe jacking vehicle, and two limit plates are arranged on the push rod, and the two limit plates are respectively close to two outer side walls of the pipe jacking vehicle that are opposite to each other.

[0009] By adopting the above technical solution, workers put the push rod into the installation groove, and the two limit plates cooperate with the interference effect of the outer wall of the jacking vehicle, thereby realizing convenient disassembly and assembly between the push rod and the jacking vehicle.

[0010] Optionally, a limit member for limiting the pipe jacking vehicle from moving away from the stacking track is arranged on the support frame near the stacking track, and the limit member includes a cylinder arranged on the support frame and electrically connected to the control system, the piston rod of the cylinder is arranged inclined toward the push rod along the direction from the pipe jacking vehicle to the stacking track, and a jacking block for supporting the pipe jacking vehicle is arranged on the piston rod of the cylinder.

[0011] By adopting the above technical solution, when the pipe jacking vehicle cooperates with the push rod to push the pipe to a predetermined position, the piston rod of the cylinder is extended immediately, and the push block is supported on the pipe jacking vehicle to limit it, thereby avoiding the possibility that the pipe reacts to the pipe jacking device and causes it to run in the reverse direction.

[0012] Optionally, a top plate for supporting the end face of the pipe is arranged on the push rod, and a bearing tube is fixedly sleeved on the push rod at a position opposite to the top plate on the side facing away from the jacking vehicle. The bearing tube is closed between one end away from the jacking vehicle and the push rod, and the other end is open. A ventilation groove is opened between the inner and outer walls of the bearing tube, and an elastic bag in a ring shape and communicated with the outer wall of the bearing tube is arranged at a position opposite to the ventilation groove. A compression ring is slidingly sleeved on the push rod, and the compression ring is located on the side of the top plate facing away from the jacking vehicle. When the compression ring moves into the bearing tube, the compression ring is tightly attached to the outer wall of the push rod and the inner wall of the bearing tube.

[0013] By adopting the above technical solution, when the pipe jacking vehicle stops pushing the material, the air compression ring slides into the supporting tube under the action of inertia, thereby squeezing the air between the supporting tube and the push rod into the elastic bag through the ventilation groove. The elastic bag deforms and expands and contacts the inner wall of the pipe, so that the friction between the elastic bag and the pipe can brake the pipe, reducing the possibility of the pipe deviating from the predetermined position under the action of inertia.

[0014] Optionally, a guide rod is arranged on the inner end surface of the bearing tube, the air compressor ring is slidably sleeved on the guide rod, a return compression spring is sleeved on the guide rod, and the return compression spring is supported between the air compressor ring and the inner end surface of the bearing tube.

[0015] By adopting the above technical solution, when the inertia of the air compressor ring disappears, the reset spring can push the air compressor ring close to the top plate to achieve reset, so that the air in the elastic bag returns to the supporting tube, so that the elastic bag releases contact with the pipe, thereby facilitating the push rod to detach from the pipe.

[0016] Optionally, the elastic bags and ventilation grooves are arranged in multiple groups on the supporting tube along the axial direction thereof at intervals.

[0017] By adopting the above technical solution, multiple elastic bags can enhance the braking effect on the pipe and improve the accuracy of the pipe transfer position.

[0018] Optionally, a bearing slip ring is arranged at the closed end of the bearing tube, a slide plate which is slidably arranged in the bearing slip ring and is tightly attached to the inner wall thereof, a pressurizing slide groove is opened on the outer wall of the push rod along its axial direction, a push strip which extends into the pressurizing slide groove and slides with the pressurizing slide groove is arranged on the slide plate, a push block which extends out of the pressurizing slide groove and is used for supporting the pressure ring is arranged on the push strip, a compressive spring is supported between the push block and the inner end surface of the bearing tube, a vent hole is opened in the bearing tube, one end of the vent hole is connected to the position between two adjacent elastic bags on the outer wall of the bearing tube, and the other end is connected to the inner cavity of the bearing slip ring on the side of the slide plate facing the jacking vehicle.

[0019] By adopting the above technical solution, when the air compression ring moves from the position of each ventilation groove under the action of inertia, it will resist the push block and push it to move, and the push block pushes the slide plate gradually away from the push rod through the push bar, so that the air between the two adjacent elastic bags can be sucked into the load-bearing slip ring through the vent hole, and negative pressure is formed between the two adjacent elastic bags and the pipe is adsorbed, further improving the braking effect on the pipe.

[0020] Optionally, the slide plate and the air compressor ring are coated with polytetrafluoroethylene.

[0021] By adopting the above technical solution, the friction coefficient of polytetrafluoroethylene is small, which is beneficial to improving the smoothness of the movement of the slide plate and the compressor ring.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The control system starts the drive motor, and the output shaft of the drive motor drives the sprocket to rotate. The chain drives the pipe jacking vehicle to move under the action of the sprocket. The pipe jacking vehicle drives the push rod to support the pipe placed on the stacking track and push it to move. The operation is simple and the transfer efficiency of the pipe is high. 2. When the pipe jacking vehicle stops pushing the material, the air compression ring slides into the bearing tube under the action of inertia, so that the air between the bearing tube and the push rod is squeezed into the elastic bag through the ventilation groove. The elastic bag deforms and expands and contacts the inner wall of the pipe. The friction between the elastic bag and the pipe can stop the pipe, reducing the possibility of the pipe deviating from the predetermined position under the action of inertia; 3. When the inertia of the air compressor ring disappears, the reset spring can push the air compressor ring close to the top plate to reset it, so that the air in the elastic bag returns to the bearing tube, so that the elastic bag is no longer in contact with the pipe, and the push rod is easily separated from the pipe; 4. When the air compressor ring moves past the positions of the ventilation grooves under the action of inertia, it will resist the push block and push it to move, and the push block pushes the slide plate gradually away from the push rod through the push bar, so that the air between the two adjacent elastic bags can be sucked into the load-bearing slip ring through the vent hole, and negative pressure is formed between the two adjacent elastic bags to adsorb the pipe, further improving the braking effect on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view showing the positional relationship among the elastic bag, the vent groove, and the air compression ring in the embodiment of the present application.

[0025] Figure 3 It is a cross-sectional view showing the positional relationship among the vent hole, the slide plate and the load-bearing slip ring in the embodiment of the present application.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Carrying frame; 2. Pipe jacking vehicle; 21. Mounting groove; 3. Stacking track; 4. Push rod; 41. Pressurized slide groove; 5. Sprocket; 6. Chain; 7. Driving motor; 8. Limit plate; 9. Limit member; 91. Cylinder; 92. Push block; 10. Push plate; 11. Carrying cylinder; 111. Air vent; 112. Air groove; 12. Elastic bag; 13. Compressed air ring; 14. Guide rod; 15. Reset spring; 16. Carrying slip ring; 17. Slide plate; 18. Push strip; 19. Push block; 20. Re-compression spring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] The embodiment of the present application discloses an automatic pipe jacking device for a cold drawing machine.

[0029] Reference Figure 1 The automatic pipe jacking device of the cold drawing machine includes a carrier frame 1 placed at the end of a stacking track 3, a pipe jacking vehicle 2 movably mounted on the carrier frame 1, and a push rod 4 for pushing the pipe to move is arranged on the pipe jacking vehicle 2.

[0030] Reference Figure 1 Two sprockets 5 are rotatably mounted on the carrier 1, a chain 6 is sleeved between the two sprockets 5, and the pipe jacking vehicle 2 is detachably connected to the chain 6. Two drive motors 7 electrically connected to the control system are bolted to the carrier 1, one sprocket 5 corresponds to one drive motor 7 and is coaxially connected to the drive motor 7, and the drive motor 7 adopts a forward and reverse servo motor in the prior art.

[0031] Reference Figure 1The control system starts the drive motor 7, the output shaft of the drive motor 7 drives the corresponding sprocket 5 to rotate, the sprocket 5 drives the jacking vehicle 2 to move through the chain 6, and the jacking vehicle 2 drives the push rod 4 to contact the pipe on the stacking track 3 and push it to achieve short-distance movement.

[0032] Reference Figure 1 A mounting groove 21 for placing the push rod 4 is vertically opened on the jacking vehicle 2, and two limit plates 8 are welded on the push rod 4. The two limit plates 8 are respectively close to the two outer side walls of the jacking vehicle 2 that are opposite to each other, so as to realize the easy disassembly and assembly between the push rod 4 and the jacking vehicle 2.

[0033] Reference Figure 1 Since the predetermined conveying position of the pipe may be located at a high place, it may be conveyed obliquely upward. However, when the driving motor 7 does not have a self-locking function, the pipe at the high place reacts on the pipe jacking device, causing the pipe jacking device to operate in the reverse direction, that is, the pipe slides down from the high place again.

[0034] To this end, two groups of limiting members 9 are arranged on the support frame 1 near the stacking track 3 and are distributed in a stacked manner about the push rod 4 . The limiting members 9 are used to limit the pipe jacking vehicle 2 from being away from the stacking track 3 .

[0035] The limiting member 9 includes a cylinder 91 bolted to the carrier frame 1 and electrically connected to the control system. The piston rod of the cylinder 91 is tilted toward the push rod 4 along the direction from the pipe jacking vehicle 2 to the stacking track 3. A top block 92 for supporting the pipe jacking vehicle 2 is threadedly connected to the piston rod of the cylinder 91.

[0036] Reference Figure 1 When the pipe jacking vehicle 2 cooperates with the push rod 4 to push the pipe to a predetermined position, the piston rod of the cylinder 91 extends, so that the push block 92 is supported on the pipe jacking vehicle 2, thereby limiting the pipe jacking vehicle 2 from moving away from the stacking track 3.

[0037] In order to improve the supporting effect of the jacking block 92 on the pipe jacking vehicle 2, the position on the pipe jacking vehicle 2 relative to the supporting position of the jacking block 92 is chamfered.

[0038] Reference Figure 1 and Figure 2 A top plate 10 for supporting the end face of the pipe is welded on the push rod 4, and a bearing tube 11 is fixedly sleeved on the push rod 4 at a position opposite to the top plate 10 and facing away from the jacking vehicle 2. The bearing tube 11 is closed between the push rod 4 at one end away from the jacking vehicle 2, and the other end is open.

[0039] A plurality of ventilation grooves 112 are circumferentially opened between the inner and outer walls of the carrier tube 11. An annular elastic bag 12 in communication with the outer wall of the carrier tube 11 is bonded to the position of the outer wall of the carrier tube 11 relative to the ventilation grooves 112. The elastic bag 12 and the ventilation grooves 112 are arranged in multiple groups on the carrier tube 11 along its axial direction at intervals.

[0040] Reference Figure 1 and Figure 2 A compression ring 13 is provided on the sliding sleeve of the push rod 4. The compression ring 13 is located on the side of the top plate 10 facing away from the jacking vehicle 2. The compression ring 13 is slidably matched with the supporting tube 11. The compression ring 13 is coated with polytetrafluoroethylene to improve the smoothness of its sliding.

[0041] Reference Figure 1 and Figure 2 When jacking the pipe, the top plate 10 supports the end face of the pipe, and the air pressure ring 13 and the bearing tube 11 are inserted into the pipe. When the driving motor 7 stops running, the pipe jacking vehicle 2 will stop moving forward quickly, and the pipe will continue to slide forward under the action of inertia.

[0042] During this process, the air compressor ring 13 on the push rod 4 will continue to slide in the same direction as the tube under the action of inertia, and the air compressor ring 13 will slide into the supporting tube 11. Since the air compressor ring 13 is tightly attached to the outer wall of the push rod 4 and the inner wall of the supporting tube 11, the air compressor ring 13 will press the air between the supporting tube 11 and the push rod 4 into each elastic bag 12 through the ventilation groove 112.

[0043] Each elastic bag 12 is deformed and expanded to contact the inner wall of the tube, so that the friction between the elastic bag 12 and the tube can stop the tube, reducing the possibility of the tube deviating from the predetermined position under the action of inertia.

[0044] Reference Figure 1 and Figure 2 A guide rod 14 is threadedly connected to the inner end surface of the carrier tube 11, and the compressor ring 13 is slidably sleeved on the guide rod 14. A return spring 15 is sleeved on the guide rod 14, and the return spring 15 is supported between the compressor ring 13 and the inner end surface of the carrier tube 11.

[0045] Reference Figure 1 and Figure 2 When the air compressor ring 13 enters the bearing tube 11, the air compressor ring 13 squeezes the return spring 15. When the inertia of the air compressor ring 13 disappears, the return spring 15 can push the air compressor ring 13 to approach the top plate 10 to achieve return.

[0046] During the resetting process of the compressed air ring 13 , the multiple elastic bags 12 shrink simultaneously, and the air inside the elastic bags 12 returns to between the bearing tube 11 and the push rod 4 through the ventilation groove 112 .

[0047] Reference Figure 1 , Figure 2 and Figure 3The closed end of the bearing tube 11 is coaxially welded with a bearing slip ring 16, and a slide plate 17 is slidably arranged in the bearing slip ring 16 and is in close contact with the inner wall thereof, and the slide plate 17 is coated with polytetrafluoroethylene. A pressurizing slide groove 41 is provided on the outer wall of the push rod 4 along its axial direction, and a push bar 18 is welded on the slide plate 17 and extends into the pressurizing slide groove 41 and slides with it.

[0048] The push bar 18 is integrally formed with a push block 19 extending from a pressurizing slide groove 41 and used to support the compressed air ring 13, and a re-compression ring is supported between the push block 19 and the inner end surface of the bearing tube 11. The inner circumference of the wall of the bearing tube 11 is provided with a plurality of vent holes 111, one end of the vent hole 111 is connected to the position between two adjacent elastic bags 12 on the outer side wall of the bearing tube 11, and the other end is connected to the inner cavity of the bearing sliding ring 16 on the side facing the jacking vehicle 2 relative to the slide plate 17.

[0049] Reference Figure 1 , Figure 2 and Figure 3 When the air compression ring 13 moves past the positions of the ventilation grooves 112 under the action of inertia, it will contact the push block 19 and push it to continue to approach the closed end of the bearing tube 11, and the push block 19 pushes the slide plate 17 gradually away from the push rod 4 through the push bar 18, so that the air between the two adjacent elastic bags 12 can be sucked into the bearing sliding ring 16 through the vent hole 111, and negative pressure is formed between the two adjacent elastic bags 12 to achieve adsorption of the pipe, further improving the braking effect on the pipe.

[0050] When the inertia of the air compressor ring 13 disappears, the compression spring 20 pushes the push block 19 to reset, and the slide plate 17 approaches the push rod 4 again, so that the negative pressure between the two adjacent elastic bags 12 is released.

[0051] The implementation principle of the automatic pipe jacking device of a cold drawing machine in the embodiment of the present application is: The control system starts the drive motor 7, and the output shaft of the drive motor 7 drives the sprocket 5 to rotate. The chain 6 drives the pipe jacking vehicle 2 to move under the action of the sprocket 5, and the pipe jacking vehicle 2 drives the push rod 4 to move. The supporting tube 11 on the push rod 4 is inserted into the pipe and the top plate 10 supports the end face of the pipe. Then the push rod 4 can push the pipe to achieve short-distance movement.

[0052] When the driving motor 7 stops running, the pipe jacking vehicle 2 will stop moving forward quickly, and the pipe will continue to slide forward under the effect of inertia. In this process, the compressed air ring 13 on the push rod 4 will also continue to slide in the same direction as the pipe under the effect of inertia.

[0053] The air compression ring 13 slides into the bearing tube 11 , and the air compression ring 13 presses the air between the bearing tube 11 and the push rod 4 into each elastic bag 12 through the ventilation groove 112 , and each elastic bag 12 is deformed and expanded and contacts the inner wall of the tube.

[0054] When the air compression ring 13 moves past the position of each ventilation groove 112, it will resist the push block 19 and push it to continue to approach the closed end of the supporting tube 11, and the push block 19 pushes the slide plate 17 gradually away from the push rod 4 through the push bar 18, so that the air between the two adjacent elastic bags 12 can be sucked into the supporting sliding ring 16 through the ventilation hole 111, and negative pressure is formed between the two adjacent elastic bags 12 to achieve adsorption of the pipe.

[0055] The resistance of the elastic bag 12 to the inner wall of the tube and the pulling effect of the negative pressure cavity between two adjacent elastic bags 12 on the tube have a braking effect on the tube, reducing the possibility of the tube deviating from the predetermined position under the action of inertia.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic pipe jacking device for a cold drawing machine, characterized in that: The invention comprises a support frame (1) arranged at the end of a stockpiling track (3), a pipe jacking vehicle (2) movably mounted on the support frame (1), a push rod (4) for pushing the pipe to move is arranged on the pipe jacking vehicle (2), two sprocket wheels (5) are rotatably mounted on the support frame (1), a chain (6) is sleeved between the two sprocket wheels (5), the pipe jacking vehicle (2) is connected to the chain (6), and a driving motor (7) is arranged on the support frame (1) and is electrically connected to a control system and coaxially connected to the sprocket wheel (5).

2. The automatic pipe jacking device for the cold drawing machine according to claim 1, characterized in that: The pipe jacking vehicle (2) is provided with a mounting groove (21) for placing a push rod (4) in a vertical direction, and two limit plates (8) are arranged on the push rod (4), and the two limit plates (8) are respectively closely attached to two opposite outer side walls of the pipe jacking vehicle (2).

3. The automatic pipe jacking device for the cold drawing machine according to claim 1, characterized in that: A limiting member (9) for limiting the pipe jacking vehicle (2) from moving away from the pipe jacking vehicle (2) is arranged at a position on the support frame (1) near the stockpiling track (3). The limiting member (9) comprises a cylinder (91) arranged on the support frame (1) and electrically connected to a control system. The piston rod of the cylinder (91) is arranged to be inclined toward the push rod (4) along the direction from the pipe jacking vehicle (2) to the stockpiling track (3). A top block (92) for supporting the pipe jacking vehicle (2) is arranged on the piston rod of the cylinder (91).

4. The automatic pipe jacking device for the cold drawing machine according to claim 1, characterized in that: The push rod (4) is provided with a top plate (10) for supporting the end surface of the pipe, and a bearing tube (11) is fixedly sleeved on the push rod (4) at a position opposite to the top plate (10) and facing away from the pipe jacking vehicle (2). The bearing tube (11) is closed between the push rod (4) and one end away from the pipe jacking vehicle (2), and the other end is open. A ventilation groove (112) is opened between the inner and outer side walls of the bearing tube (11). An elastic bag (12) in a ring shape and in communication with the vent groove (112) is arranged at a position of the outer wall relative to the vent groove (112); a compression ring (13) is provided on the sliding sleeve of the push rod (4); the compression ring (13) is located on the side of the top plate (10) facing away from the jacking vehicle (2); when the compression ring (13) moves into the supporting tube (11), the compression ring (13) and the outer wall of the push rod (4) and the inner wall of the supporting tube (11) are both in close contact.

5. The automatic pipe jacking device for the cold drawing machine according to claim 4, characterized in that: A guide rod (14) is arranged on the inner end surface of the bearing tube (11), the air compressor ring (13) is slidably sleeved on the guide rod (14), and a return spring (15) is sleeved on the guide rod (14), and the return spring (15) is supported between the air compressor ring (13) and the inner end surface of the bearing tube (11).

6. The automatic pipe jacking device for the cold drawing machine according to claim 4, characterized in that: The elastic bags (12) and the ventilation grooves (112) are arranged in multiple groups on the supporting tube (11) at intervals along the axial direction thereof.

7. The automatic pipe jacking device for the cold drawing machine according to claim 6, characterized in that: The closed end of the bearing tube (11) is provided with a bearing slip ring (16), a slide plate (17) is slidably arranged in the bearing slip ring (16) and is in close contact with the inner wall thereof, a pressurizing slide groove (41) is provided on the outer wall of the push rod (4) along its axial direction, a push bar (18) is arranged on the slide plate (17) and extends into the pressurizing slide groove (41) and is slidably matched with the pressurizing slide groove (41), and a push bar (18) is arranged on the push bar (18) and extends out of the pressurizing slide groove (41) and is used to supply pressure. A push block (19) is supported by an air ring (13), and a compression spring (20) is provided between the push block (19) and the inner end surface of the supporting tube (11). A vent hole (111) is provided in the supporting tube (11), and one end of the vent hole (111) is connected to a position between two adjacent elastic bags (12) on the outer wall of the supporting tube (11), and the other end is connected to an inner cavity of the supporting sliding ring (16) on the side facing the slide plate (17) toward the pipe jacking vehicle (2).

8. The automatic pipe jacking device for the cold drawing machine according to claim 7, characterized in that: The slide plate (17) and the air compression ring (13) are both coated with polytetrafluoroethylene.

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