Three-station translation pipe carrying vehicle with lifting device

Abstract

The application provides a three-station translation pipe conveying vehicle with a lifting device, which comprises a fixed base mechanism, a translation vehicle frame mechanism, a first-station supporting wheel rotating mechanism, a second-station V-shaped roller axial moving mechanism and a third-station V-shaped supporting mechanism; the first-station supporting wheel rotating mechanism, the second-station V-shaped roller axial moving mechanism and the third-station V-shaped supporting mechanism are fixed on the translation vehicle frame mechanism in sequence by means of three groups of scissors supporting lifting mechanisms. The application realizes a new device integrating three functions of lifting, rotating, centering and translation, and achieves the effects of rotating, centering, lifting and translation. The application has simple structure and reasonable design, and realizes that the cast pipe keeps rotating during the conveying process, thereby avoiding the dripping phenomenon of the inner wall coating of the cast pipe and improving the product qualification rate of the inner spraying.

Description

Technical Field

[0001] This invention belongs to the technical field of pre- and post-processing transfer equipment for cast iron pipes, and specifically relates to a three-station translational pipe transport vehicle with a lifting device. Background Technology

[0002] For cast iron pipes with specifications of DN350-1000, a walking beam is generally used for transfer between workstations in the area where special material lining is applied. After the cast iron pipes come out of the preheating furnace, they are directly transferred to the area where the special coating is applied to the inner wall. From the inner spraying workstation to the next rotating workstation, the cast iron pipes must remain in a rotating state to ensure that the special coating on the inner wall of the cast iron pipe does not drip.

[0003] Currently, conventional pipe transport vehicles use V-shaped roller supports to secure cast iron pipes, which offers relatively poor stability. When transferring pipes between workstations, the roller supports at each workstation must be completely stopped before the transport vehicle can lift and lower the pipes for connection or release. Otherwise, the cast iron pipes may roll off the V-shaped supports during connection or release, causing an accident. Furthermore, due to the flowable nature of the internal spray coating, the cast iron pipes must be allowed to solidify to a certain degree before rotation can be stopped, and then the pipes can be transferred to the next workstation. This significantly reduces the efficiency of the internal spray coating production line. The frequent starting and stopping of the roller motors at each workstation also reduces motor lifespan and equipment reliability.

[0004] In addition, to facilitate pipe connection and release operations, there are some other requirements for the pipe transport vehicle: In its initial state, the highest point of the transport vehicle must be lower than the lowest point of the cast iron pipe for easy pipe connection; during transport, the lowest point of the cast iron pipe lifted by the transport vehicle must be higher than the highest point of the support rollers at each workstation for easy pipe release. Therefore, the transport vehicle not only needs a large lifting range but also a low foundation. Currently, due to the relatively high height of the transport vehicle, to ensure its highest point is lower than the lowest point of the cast iron pipe and to facilitate observation and inspection by workers, the transport vehicle must be used with a deep pit foundation, which is uneconomical and inconvenient for maintenance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a three-station translational transport vehicle that is easy to operate and improves operational efficiency.

[0006] The technical solution adopted in this invention is as follows: a three-station translational pipe transport vehicle with a lifting device, comprising a fixed base mechanism, a translational frame mechanism, a first-station support roller rotation mechanism, a second-station V-roller axial movement mechanism, and a third-station V-support mechanism; the first-station support roller rotation mechanism, the second-station V-roller axial movement mechanism, and the third-station V-support mechanism are sequentially fixed to the translational frame mechanism by means of three sets of scissor-braced lifting mechanisms; the fixed base mechanism includes a large base, segmented guide rails, and a translational cylinder, the segmented guide rails are fixed on the large base, and the cylinder body of the translational cylinder is horizontally fixed on one side of the large base; the translational frame mechanism includes an integral frame and a wheel set for the integral frame to move; the integral frame is located on the large base, the wheel set is located within the segmented guide rails, the piston rod end of the translational cylinder is fixedly connected to the integral frame, and the translational frame mechanism and the fixed base mechanism form a sliding connection.

[0007] Furthermore, the first station roller rotation mechanism includes a first base plate, a rotary reduction motor, a driving roller, and a driven roller. The driving roller and the driven roller are rotatably connected to the first base plate via a rotating shaft and a fixed seat. The rotary reduction motor drives the driving roller to rotate. The second station V-roller axial movement mechanism includes a second base plate and a self-rotating V-roller. The V-roller is rotatably connected to the second base plate via a rotating shaft and a sliding bearing seat. The third station V-support mechanism includes a third base plate and a V-support. The V-support is fixedly connected to the third base plate. The first base plate, the second base plate, and the third base plate are respectively fixed on three sets of scissor-braced lifting mechanisms.

[0008] Furthermore, the scissor brace lifting mechanism includes a lifting platform parallel to the overall frame, a connecting frame, two scissor braces connecting the upper and lower bases of the lifting platform, and a lifting cylinder for driving the lifting platform. The two scissor braces are composed of an inner arm and an outer arm hinged in the middle. The hinge joint of the inner arm and the outer arm is connected by a connecting shaft and a bearing. The lower end of the inner arm is hinged and fixed to the connecting frame, and the upper end is slidably connected to the bottom of the lifting platform. The lower end of the outer arm is slidably connected to the connecting frame, and the upper end is hinged and fixed to the lifting platform. The cylinder body of the lifting cylinder is hinged and fixed to the connecting frame, and the piston rod end is hinged to the lower part of the lifting platform by means of a cylinder head hinge seat.

[0009] Furthermore, the scissor brace lifting mechanism also includes 6 carbon steel pipes and a cable chain. The carbon steel pipes are connected to the hydraulic circuit of the lifting cylinder and are fixed to the top of the overall frame. One end of the cable chain is fixed to the large base and the other end is fixed to the overall frame.

[0010] Furthermore, the wheel set consists of 4 sets, which are symmetrically and independently installed at the bottom of the overall frame.

[0011] Furthermore, the large base is an H-shaped steel frame.

[0012] The beneficial effects of this invention are as follows: This invention realizes a new device integrating three functions: lifting and rotation, lifting and centering, and lifting and translation, achieving the effects of rotation, centering, lifting, and translation. The invention has a simple structure and reasonable design, ensuring that the cast iron pipe remains in a rotating state throughout the casting process, avoiding dripping of the coating on the inner wall of the pipe and improving the product qualification rate of internally sprayed coatings. Furthermore, by controlling the rotational linear speed of the cast iron pipe with frequency conversion, it maintains consistency with the rotational linear speed of the support roller devices at each station, achieving seamless connection during the casting pipe transfer process without stopping the machine, significantly improving production efficiency. At the same time, by avoiding frequent start-stop of the support roller motors at each station, the service life of the motors and the reliability of the equipment are also significantly improved.

[0013] This invention uses a lifting cylinder to directly lift the lifting platform, which greatly reduces the force on the cylinder piston rod and allows for the use of cylinders with smaller diameters, thus significantly reducing the overall size of the pipe transport vehicle. The active support roller is directly connected to the reduction motor, ensuring sufficient installation space for the structure. The second-station V-roller axial movement mechanism has a compact structure and occupies little space. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the initial state of the main view structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the second state main view structure of the present invention;

[0016] Figure 3 This is a top view of the structure of the present invention;

[0017] Figure 4 This is a side view of the structure of the present invention;

[0018] Figure 5 This is a side view of the fixing base device of the present invention;

[0019] Figure 6 This is a top view of the fixing base device of the present invention;

[0020] Figure 7 This is a schematic diagram of the main structure of the translation frame mechanism of the present invention;

[0021] Figure 8 This is a top view schematic diagram of the translation frame mechanism of the present invention;

[0022] Figure 9 A schematic diagram of the main structure of the scissor-braced lifting mechanism;

[0023] Figure 10 A side view of the scissor-support lifting device;

[0024] Figure 11 This is a schematic diagram of the rotating mechanism of the first station's support rollers.

[0025] Figure 12 This is a schematic diagram of the V-roller structure of the present invention;

[0026] Figure 13 This is a schematic diagram of the V-shaped support structure of the present invention;

[0027] In the diagram: 1 Cast iron pipe, 2 Fixed base device, 3 Translation frame mechanism, 4 Scissor brace lifting mechanism, 5 First station support roller rotation mechanism, 6 Second station V-roller axial movement mechanism, 7 Third station V-support mechanism, 8 Large base, 9 Segmented guide rail, 10 Translation cylinder, 11 Overall frame, 12 Wheel set, 13 Carbon steel pipe, 14 V-support, 15 Driven support roller, 16 V-roller, 17 Inner arm, 18 Outer arm, 19 Cable chain, 20 Connecting shaft, 21 Connecting frame, 22 Lifting platform, 23 Lifting cylinder, 24 Cylinder head hinge seat, 25 Rotary reduction motor, 26 Driven support roller. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figure 1-13As shown, a three-station translational pipe transport vehicle with a lifting device includes a fixed base mechanism 2, a translational frame mechanism 3, a first-station roller rotation mechanism 5, a second-station V-roller axial movement mechanism 6, and a third-station V-support mechanism 7. The first-station roller rotation mechanism 5, the second-station V-roller axial movement mechanism 6, and the third-station V-support mechanism 7 are sequentially fixed to the translational frame mechanism 3 by means of three sets of scissor-support lifting mechanisms 4. The fixed base mechanism 2 includes a large base 8, segmented guide rails 9, and a translational cylinder 10. The segmented guide rails 9 are fixed to the large base 8, and the cylinder body of the translational cylinder 10 is horizontally fixed to one side of the large base 8. The translational frame mechanism 3 includes an integral frame 11 and a wheel set 12 for the integral frame 11 to move. The integral frame 11 is located on the large base 8, the wheel set 12 is located inside the segmented guide rails 9, the piston rod end of the translational cylinder 10 is fixedly connected to the integral frame 11, and the translational frame mechanism 3 and the fixed base mechanism 2 are slidably connected. The first station roller rotation mechanism 5 includes a first base plate, a rotary reduction motor 25, a driving roller 26, and a driven roller 15. The driving roller 26 and the driven roller 15 are rotatably connected to the first base plate via a rotating shaft and a fixed seat. The rotary reduction motor 25 drives the driving roller 26 to rotate. The second station V-roller axial movement mechanism 6 includes a second base plate and a self-rotating V-roller 16. The V-roller 16 is rotatably connected to the second base plate via a rotating shaft and a sliding bearing seat. The third station V-support mechanism 7 includes a third base plate and a V-support 14. The V-support 14 is fixed on the third base plate. The first base plate, the second base plate, and the third base plate are respectively fixed on three sets of scissor-support lifting mechanisms 4.

[0030] The scissor-braced lifting mechanism 4 of this invention includes a lifting platform 22 parallel to the overall frame 11, a connecting frame 21, two scissor braces connecting the upper and lower bases of the lifting platform 22, and a lifting cylinder 23 for driving the lifting action of the upper platform. The two scissor braces are composed of an inner arm 17 and an outer arm 18 hinged in the middle. The hinge joint of the inner arm 17 and the outer arm 18 is connected by a connecting shaft 20 and a bearing. The lower end of the inner arm 17 is hinged and fixed to the connecting frame 21, and the upper end is slidably connected to the bottom of the lifting platform 22. The lower end of the outer arm 18 is slidably connected to the connecting frame 21, and the upper end is hinged and fixed to the lifting platform 22. The cylinder body of the lifting cylinder 23 is hinged and fixed to the connecting frame 21, and the piston rod end is hinged to the lower part of the lifting platform 22 by means of a cylinder head hinge seat 24. The scissor-support lifting mechanism 4 also includes 6 carbon steel pipes 13 and a drag chain 19. The carbon steel pipes 13 are connected to the oil circuit of the lifting cylinder 23. The carbon steel pipes 13 are fixed to the top of the overall frame 11. One end of the drag chain 19 is fixed to the large base 8 and the other end is fixed to the overall frame 11.

[0031] The present invention has four sets of wheel assemblies 12, which are symmetrically and independently installed at the bottom of the overall frame 11. The large base 8 is an H-shaped steel frame.

[0032] In practice: At the first station, the cast iron pipe 1 rotates to begin the special coating spraying operation on the inner wall of the pipe. Since the starting and ending spraying positions are basically inside the pipe, the edge of the coating is far from the edge of the socket of the cast iron pipe 1. After completing the inner spraying of the pipe, precise inner spraying is required at the edge of the socket of the cast iron pipe 1 at the second station to compensate for the overall coverage area of ​​the inner lining coating. The cast iron pipe 1 must be kept rotating when transferring from the inner spraying station to the inner spraying station of the socket to prevent dripping of the inner coating.

[0033] When the first-station support roller rotation mechanism 5 of this invention lifts the pipe, the rotary reduction motor 25 is started to make the rotation speed of the active support roller 26 and the driven support roller 27 consistent with the rotation speed of the external support roller. At the same time, it lifts the cast iron pipe 1 and moves it to the second station. The rotating cast iron pipe 1 is then lowered and placed on the rotating external support roller at the second station for the spigot and socket spraying operation. This achieves the function of keeping the cast iron pipe 1 rotating continuously during direct reverse transport at the station. After the spigot and socket spraying operation at the second station is completed, the second-station V-roller axial movement mechanism 6 lifts the cast iron pipe 1 and moves it to the next outer wall asphalt spraying station. At this time, the second-station V-roller axial movement mechanism 6 remains in the lifting state, and the spigot and socket tip mechanism of the external spraying machine clamps the cast iron pipe 1. During the clamping process, the cast iron pipe 1 will move to a certain extent in the axial direction. At this time, the second-station V-roller axial movement mechanism 6 of this invention just realizes the axial movement function of the cast iron pipe 1, realizing the centering of the cast iron pipe 1. After the outer wall of the cast iron pipe is coated, in order to protect the integrity of the outer wall paint film, in the subsequent transfer of the cast iron pipe 1, since the contact point between the transfer mechanism and the outer wall of the cast iron pipe 1 should be as small as possible, the V-support mechanism 7 of the third station of this invention adopts a narrow V-support 14 to lift the cast iron pipe 1, so as to minimize the wear on the paint film on the outer wall of the pipe. Then the cast iron pipe 1 is lifted and moved horizontally onto the conveyor chain of the curing oven to enter the curing oven to dry the asphalt coating on the outer wall of the cast iron pipe 1.

[0034] The present invention provides a translational frame mechanism 3 for moving and traveling, and a scissor-support lifting mechanism 4 for adjusting the height of the first station support roller rotation mechanism 5, the second station V-roller axial movement mechanism 6, and the third station V-support mechanism 7, so that they match the height of the support device at the inner and outer spraying production areas of the painting line. The first station support roller rotation mechanism 5 is used to lift the cast iron pipe 1 and drive it to rotate, the second station V-roller axial movement mechanism 6 is used to lift the cast iron pipe 1 and play a centering role, and the third station V-support mechanism 7 is used to lift and raise the cast iron pipe 1.

[0035] The fixed base 2 of the present invention includes a large base 8 welded from H-beams. Segmented guide rails 9 are fixedly installed on both sides of the top of the large base 8. The top of the segmented guide rails 9 is flush with the top of the large base 8. A fixed trunnion-type translation cylinder 10 is installed on the central axis of the fixed base 2. Anchor bolt holes are opened in the frame bottom plate of the large base 8, and it is fixed to the concrete foundation by anchor bolts. The piston rod shaft end of the translation cylinder 10 is bolted to the cylinder connecting plate at the bottom of the translation frame mechanism 3.

[0036] The main structure of the translation frame mechanism 3 of the present invention is a frame welded from I-beams. Positioning plates of three sets of scissor-braced lifting mechanisms 4 are welded and installed on the top of the overall frame 11. The translation frame mechanism 3 and the three sets of scissor-braced lifting mechanisms 4 are connected by bolts. Four wheel axle mounting and fixing slots are machined at the four corners of the bottom of the overall frame 11 to install wheel sets 12. The forward and backward movement of the translation frame mechanism 3 is controlled by the extension and retraction of the translation cylinder 10.

[0037] The lifting platform 22 of the scissor brace lifting mechanism 4 is made of rectangular square tubes welded into a rectangular shape. At the bottom of the lifting platform 22, there is an upper support mounting plate corresponding to the lower support and an upper slide corresponding to the lower slide, which facilitates the efficient and stable lifting of the first station support roller rotation mechanism 5, the second station V roller axial movement mechanism 6 and the third station V support mechanism 7.

[0038] The transport vehicle of this invention is also equipped with a control panel, which has multiple action buttons. The control panel is connected to the input terminal of a PLC controller, and the output terminal of the PLC controller is connected to the control terminals of the variable frequency rotary reduction motor 25 and the lifting cylinder 23 of the first station support roller assembly. After receiving control commands from the control panel, the PLC controller drives each component to operate as required, such as adjusting the travel speed, adjusting the lifting height, and adjusting the rotation speed of the support rollers. The PLC controller is a single-chip microcomputer, such as an STC89C52. The specific control method is not the focus of this invention, and those skilled in the art can choose according to their needs, which will not be described in detail here.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A three-station pipe transport vehicle with a lifting device, characterized in that: The system includes a fixed base mechanism (2), a translation frame mechanism (3), a first-station support roller rotation mechanism (5), a second-station V-roller axial movement mechanism (6), and a third-station V-support mechanism (7). The first-station support roller rotation mechanism (5), the second-station V-roller axial movement mechanism (6), and the third-station V-support mechanism (7) are sequentially fixed to the translation frame mechanism (3) by means of three sets of scissor-support lifting mechanisms (4). The fixed base mechanism (2) includes a large base (8), segmented guide rails (9), and a translation cylinder (10). The rail (9) is fixed on the large base (8), and the cylinder body of the translation cylinder (10) is horizontally fixed on one side of the large base (8); the translation frame mechanism (3) includes an integral frame (11) and a wheel set (12) for the integral frame (11) to travel; the integral frame (11) is located on the large base (8), the wheel set (12) is located in the segmented guide rail (9), the piston rod end of the translation cylinder (10) is fixedly connected to the integral frame (11), and the translation frame mechanism (3) and the fixed base mechanism (2) are slidably connected; The first station support roller rotation mechanism (5) includes a first base plate, a rotary reduction motor (25), an active support roller (26), and a driven support roller (15). The active support roller (26) and the driven support roller (15) are rotatably connected to the first base plate via a rotating shaft and a fixed seat. The rotary reduction motor (25) drives the active support roller (26) to rotate. The second station V-roller axial movement mechanism (6) includes a second base plate and a self-rotating V-roller (16). The V-roller (16) is rotatably connected to the second base plate via a rotating shaft and a sliding bearing seat. The third station V-support mechanism (7) includes a third base plate and a V-support (14). The V-support (14) is fixedly connected to the third base plate. The first base plate, the second base plate, and the third base plate are respectively fixed on three sets of scissor-support lifting mechanisms (4). When the first station's roller rotation mechanism (5) lifts the pipe, it starts the rotary reduction motor (25) to make the rotation speed of the active roller (26) and the driven roller (15) consistent with the rotation speed of the external roller. At the same time, it lifts the cast iron pipe (1) and moves it to the second station. It lowers the rotating cast iron pipe (1) and places it on the rotating external roller in the second station for spigot and socket spraying, thus realizing the function of keeping the cast iron pipe (1) rotating continuously during direct reverse transport at the station. After the spigot and socket spraying is completed at the second station, the second station's V-roller axial moving mechanism (6) lifts the cast iron pipe (1) and moves it to the next external asphalt spraying station. At this time, the second station V-roller axial moving mechanism (6) is in the lifting state, and the casting pipe external spraying machine socket tip mechanism clamps the cast iron pipe (1). During the clamping process of the cast iron pipe (1), it moves in the axial direction. At this time, the second station V-roller axial moving mechanism (6) realizes the axial movement function of the cast iron pipe (1) and realizes the centering of the cast iron pipe (1). The outer wall spraying operation of the casting pipe is completed. During the transfer of the cast iron pipe (1), the third station V-support mechanism (7) uses a narrow V-support (14) to lift the cast iron pipe (1), and then lifts the cast iron pipe (1) and moves it to the curing furnace conveyor chain to enter the curing furnace to dry the asphalt coating on the outer wall of the cast iron pipe (1).

2. The three-station pipe transport vehicle with lifting device according to claim 1, characterized in that: The scissor-braced lifting mechanism (4) includes a lifting platform (22) arranged parallel above the overall frame (11), a connecting frame (21), two scissor braces connecting the lifting platform (22), and a lifting cylinder (23) for driving the lifting platform (22). The two scissor braces are composed of an inner arm (17) and an outer arm (18) hinged in the middle. The hinge of the inner arm (17) and the outer arm (18) is connected by a connecting shaft (20) and a bearing. The lower end of the inner arm (17) is hinged and fixed to the connecting frame (21), and the upper end is slidably connected to the bottom of the lifting platform (22). The lower end of the outer arm (18) is slidably connected to the connecting frame (21), and the upper end is hinged and fixed to the lifting platform (22). The cylinder body of the lifting cylinder (23) is hinged and fixed to the connecting frame (21), and the piston rod end is hinged to the lower part of the lifting platform (22) by means of the cylinder head hinge seat (24).

3. The three-station pipe transport vehicle with lifting device according to claim 2, characterized in that: The scissor-support lifting mechanism (4) also includes 6 carbon steel pipes (13) and a drag chain (19). The carbon steel pipes (13) are connected to the oil circuit of the lifting cylinder (23). The carbon steel pipes (13) are fixed to the top of the overall frame (11). One end of the drag chain (19) is fixed to the large base (8) and the other end is fixed to the overall frame (11).

4. The three-station pipe transport vehicle with lifting device according to claim 1, characterized in that: The wheel sets (12) consist of 4 sets, which are symmetrically and independently installed at the bottom of the overall frame (11).

5. The three-station pipe transport vehicle with lifting device according to claim 1, characterized in that: The large base (8) is an H-shaped steel frame.

Images