Automatic catwalk capable of sending three catwalk bodies and throwing three catwalk bodies and construction method

Abstract

The invention discloses an automatic catwalk capable of delivering three catwalk bodies and throwing three catwalk bodies. The automatic catwalk comprises a base assembly, a ramp assembly, a transferring arm assembly and a supporting arm assembly. One end of the ramp assembly is obliquely connected to the base assembly, the fixed end of the supporting arm assembly is rotationally hinged to the base assembly, the supporting arm assembly is telescopic, the movable end of the supporting arm assembly is hinged to the fixed end of the transfer arm assembly, and the movable end of the transfer arm assembly can move along a guide rail of the ramp assembly. And a containing groove for containing a plurality of pipe columns to be conveyed is formed in the transfer arm assembly. According to the catwalk, three pipe columns can be conveyed at the same time, the construction efficiency is greatly improved, batched pre-storage and automatic feeding of the pipe columns are achieved through pipe row frames on the two sides of the base assembly, the pipe columns are precisely pushed to V-shaped containing grooves of the transfer arms in cooperation with the pipe column turnover device, and stable lifting and positioning of the transfer arms are achieved through stretching and rotating of the supporting arm assembly in cooperation with ramp guide rails; and the tray slides to push the tubular column in order, and efficient conveying is completed.

Description

Technical Field

[0001] This invention relates to the field of automated catwalks. More specifically, this invention relates to an automated catwalk that delivers three catwalks and drops three catwalks, and its construction method. Background Technology

[0002] Catwalks are crucial equipment in oil drilling, used to transport drill pipes stored on the surface to the drilling platform. With technological advancements and changing needs, catwalks have undergone significant development and improvements. Traditionally, transporting drill pipes and drill strings involved manually operating a small winch to hoist the pipes or drill strings up the catwalk's ramp to the drilling platform. This method was inefficient, physically demanding, and lacked safety guarantees.

[0003] To improve operational efficiency and reduce the complexity of manual operations, traditional single-column conveying automated hydraulic catwalks were developed. While these catwalks reduced the workload of manual labor and improved efficiency compared to the past, they still suffer from low conveying efficiency and high energy consumption when conveying a single tube column, requiring the conveying arm to move up and down once. Summary of the Invention

[0004] In order to achieve these objects and other advantages according to the invention, a preferred embodiment of the invention provides an automatic catwalk for feeding three cats and throwing three cats, including a base assembly, a ramp assembly, a transfer arm assembly and a support arm assembly; One end of the ramp assembly is inclinedly connected to the base assembly. The fixed end of the support arm assembly is rotatably hinged to the base assembly. The support arm assembly is telescopic, and its movable end is hinged to the fixed end of the transfer arm assembly. The conveying end of the transfer arm assembly rests on the guide rail of the ramp assembly. The movable end of the transfer arm assembly can move along the guide rail of the ramp assembly. The transfer arm assembly and the support arm assembly can rotate until the transfer arm assembly is engaged in the receiving groove inside the base assembly. The transfer arm assembly is provided with a receiving groove for accommodating multiple tube columns to be conveyed.

[0005] Preferably, the base assembly includes a base body and a tube rack; the base assembly has a receiving groove along its length direction, and the tube rack is hinged to both sides of the base body along its length direction. A hydraulic cylinder is provided at the bottom of the tube rack, and the tilt angle of the tube rack is adjusted by controlling the extension and retraction of the hydraulic cylinder so that the end of the tube rack near the base body is lower, so that the tube column to be transported on the tube rack can roll along the tube rack onto the base body.

[0006] Preferably, the base assembly further includes a column flipping device disposed on the surface of the base assembly and located on both sides of the receiving groove of the base assembly. The column flipping device includes a flipping plate, one end of which is hinged to the surface of the base assembly near the receiving groove, and the other end of which is rotatable to tilt upwards, thereby pushing the column placed on it toward the receiving groove of the transfer arm assembly.

[0007] Preferably, the transfer arm assembly includes a transfer arm body, a sliding tray, a stop pin device, a baffle device, and a tube-flipping device. The transfer arm body has a receiving groove along its length to accommodate the tube to be transported, and its cross-section is V-shaped. The sliding tray is movably disposed in the receiving groove of the transfer arm, and the sliding tray slides under the drive of the drive mechanism to push the tube. The tube-flipping device is distributed on two inner inclined surfaces of the V-shaped receiving groove of the transfer arm. The tube-flipping device includes a tube-flipping hook, the non-hook end of which is hinged to the inner inclined surface of the V-shaped receiving groove of the transfer arm. The tube-flipping hook can be rotated to restrict the tube at the bottom of the receiving groove within the tube-flipping hook. At this time, the stop pin device, which is telescopically disposed on the inner inclined surface of the V-shaped receiving groove, extends to limit and lock the tube. The transfer arm body is provided with a baffle device located at the rear end of the tube to prevent the tube from sliding downward.

[0008] Preferably, the pipe-flipping hook is L-shaped, with its bending angle matching the bending angle of the bottom of the V-shaped receiving groove of the transfer arm. It is recessed and embedded in the groove of the V-shaped receiving groove of the transfer arm, flush with the inner surface of the V-shaped receiving groove. When it is necessary to flip the pipe column located at the bottom of the V-shaped receiving groove to the inner inclined surface of the V-shaped receiving groove, the hook end of the pipe-flipping hook rotates upward to restrict the pipe column within the pipe-flipping hook until the pipe column is close to resting on the inner inclined surface of the V-shaped receiving groove.

[0009] Preferably, the support arm assembly includes a support arm body and a support arm telescopic rod disposed on the support arm body. The support arm body is rotatably hinged to the base assembly. The support arm telescopic rod is a hydraulic telescopic rod, with one end hinged to the support arm body and the other end extending out of the support arm body and connected to the fixed end of the transfer arm assembly.

[0010] Another technical solution of the present invention provides a construction method for the aforementioned three-pronged automatic catwalk, comprising the following steps: S1, tubing loading Multiple tubes to be transported are placed on the tube racks on both sides of the base assembly. The hydraulic cylinders at the bottom of the tube racks on both sides of the base assembly are activated to adjust the tilt angle of the tube racks so that the end of the tube rack closer to the base body is lower than the end farther away, forming a rolling guide slope for the tubes. This allows the first tube at the front to roll along the tilt slope of the tube rack to the surface of the base body. The tube flipping device on the surface of the base assembly is activated to control the end of the flipping plate away from the receiving groove to tilt upwards, pushing the first tube placed above the flipping plate towards the V-shaped receiving groove of the transfer arm assembly, so that the first tube falls into the bottom of the V-shaped receiving groove of the transfer arm assembly. S2, Tube String Limitation and Layered Delivery Once the first tube has fallen to the bottom of the V-shaped receiving groove, the tube-flipping device inside the transfer arm assembly is activated. The L-shaped tube-flipping hook on one of the inner inclined surfaces of the V-shaped receiving groove is controlled to rotate upward. The tube-flipping hook rotates out of the groove of the V-shaped receiving groove, confining the first tube within the tube-flipping hook and flipping it upward until the first tube is close to resting on one side of the inner inclined surface of the V-shaped receiving groove. The stop pin device on that side of the inner inclined surface is then controlled to extend. At this time, the stop pin device fixes the first tube on the inner side ramp of the V-shaped receiving groove. S3. Repeat step S1 to make the second tube fall into the bottom of the V-shaped receiving groove of the transfer arm assembly; S4. The stop pin device on the inner inclined surface of the V-shaped receiving groove of the control transfer arm assembly extends out to limit the third tube column on the inner side ramp fixed to the V-shaped receiving groove. S5. Job Adjustment and Adaptation By adjusting the extension and retraction of the support arm telescopic rod, the overall length of the support arm assembly is changed. Combined with the rotation angle of the support arm body, the transfer arm assembly is driven to slide up and down along the ramp assembly guide rail. S6, String Pushing and Transfer When the transfer arm assembly slides along the ramp assembly guide rail to the preset position, the drive sliding pallet slides along the length direction in the V-shaped receiving groove, and the sliding pallet pushes the second tube column located at the bottom of the V-shaped receiving groove to move towards the conveying end along the V-shaped receiving groove; S7. Equipment Storage and Reset Control the sliding tray to return to the initial end of the V-shaped receiving groove, start the pipe flipping device to make the pipe flipping hook rotate and return to the original position, embedding into the groove of the V-shaped receiving groove and flush with the inner surface; control the extension rod of the support arm to retract, drive the main body of the support arm to rotate in the opposite direction around the hinge point of the base assembly, and slide the transfer arm assembly along the guide rail of the ramp assembly towards the base assembly until the transfer arm assembly is completely locked into the receiving groove of the base assembly; The present invention offers at least the following advantages: The catwalk of this application can simultaneously transport three pipe columns, significantly improving construction efficiency. It achieves batch pre-storage and automatic feeding of pipe columns through pipe racks on both sides of the base assembly. A pipe column flipping device precisely pushes the pipe columns into the V-shaped receiving groove of the transfer arm. The flipping device then layers and limits the three pipe columns within the inclined surface and bottom of the receiving groove, preventing mutual interference. The extension, retraction, and rotation of the support arm assembly, combined with the ramp guide rail, enable smooth lifting and positioning of the transfer arm. The sliding tray orderly pushes the pipe columns, completing efficient transportation.

[0011] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the automatic cat walkway that delivers three feeders and throws three feeders in this invention.

[0013] Figure 2 This is a schematic diagram of the base assembly in this invention.

[0014] Figure 3 This is a schematic diagram of the transfer arm assembly in this invention.

[0015] Figure 4 This is a schematic diagram of the support arm assembly in this invention. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0017] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0018] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0019] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0020] like Figure 1-4 As shown, a preferred embodiment of the present invention provides an automatic catwalk for feeding three cats and throwing three cats, including a base assembly 1, a ramp assembly 2, a transfer arm assembly 3, and a support arm assembly 4. One end of the ramp assembly 2 is inclinedly connected to the base assembly 1. The fixed end of the support arm assembly 4 is rotatably hinged to the base assembly 1. The support arm assembly 4 is telescopic, and its movable end is hinged to the fixed end of the transfer arm assembly 3. The conveying end of the transfer arm assembly 3 rests on the guide rail of the ramp assembly 2. The movable end of the transfer arm assembly 3 can move along the guide rail of the ramp assembly 2. The transfer arm assembly 3 and the support arm assembly 4 can rotate to the receiving groove in which the transfer arm assembly 3 is engaged in the base assembly 1. The transfer arm assembly 3 is provided with a receiving groove for accommodating multiple tube columns to be conveyed.

[0021] In the above technical solution, the base assembly 1 provides basic support, the ramp assembly 2 guides the movement, and the support arm assembly 4 rotates and extends to drive the transfer arm assembly 3 to lift and move, thereby transporting the tube column in the receiving slot of the transfer arm assembly 3 to the designated position. In the non-working state, the support arm assembly 4 retracts and rotates, so that the transfer arm assembly 3 is inserted into the receiving slot of the base assembly 1 to realize equipment storage. Moreover, this catwalk can simultaneously transport three catwalks at a high position, improving work efficiency.

[0022] In another technical solution, the base assembly 1 includes a base body 1-1 and a pipe rack 1-2; the base assembly 1 has a receiving groove along its length direction, and the base body 1-1 is hinged to both sides along its length direction. A hydraulic cylinder is provided at the bottom of the pipe rack, and the tilt angle of the pipe rack is adjusted by controlling the extension and retraction of the hydraulic cylinder so that the end of the pipe rack near the base body 1-1 is lower, so that the pipe column to be transported on the pipe rack 1-2 can roll along the pipe rack 1-2 onto the base body 1-1.

[0023] In the above technical solution, the extension and retraction characteristics of the hydraulic cylinder are used to change the angle between the pipe rack 1-2 and the base body 1-1, so that the pipe rack 1-2 forms an inclined slope. With the help of the weight of the pipe column itself, the pipe column is rolled from the pipe rack 1-2 to the base body 1-1. Before construction, multiple pipe columns to be transported are neatly stacked on the pipe racks 1-2 on both sides of the base body 1-1. When pipe columns need to be transported to the base body 1-1, the hydraulic cylinder is activated through the control system. The piston rod of the hydraulic cylinder extends or retracts, pushing the pipe rack 1-2 to rotate around the hinge point, adjusting the tilt angle of the pipe rack 1-2 so that the end of the pipe rack 1-2 closer to the base body 1-1 is lower than the end farther away, forming an inclined slope along the length of the pipe rack 1-2. Under the action of its own gravity, the pipe column rolls along the anti-slip stripes of the anti-slip panel towards the base body 1-1, and finally lands on the surface of the base body 1-1, completing the loading and transport of the pipe column. After the pipe column is transported, the hydraulic cylinder is reset, and the pipe rack 1-2 returns to a horizontal state, which facilitates the subsequent replenishment and stacking of pipe columns.

[0024] In another technical solution, the base assembly 1 further includes a column flipping device 1-3, which is disposed on the surface of the base assembly 1 and located on both sides of the receiving groove of the base assembly 1. The column flipping device 1-3 includes a flipping plate, one end of which is hinged to the surface of the base assembly 1 near the receiving groove, and the other end away from the receiving groove can be rotated to tilt up, thereby pushing the column placed on it toward the receiving groove of the transfer arm assembly 3.

[0025] In the above technical solution, the drive mechanism drives the tilting plate to rotate around the hinge point, causing the end of the tilting plate away from the receiving groove to tilt upwards, forming an inclined pushing surface. Using the rotational thrust of the tilting plate and the weight of the tube column itself, the tube column is pushed towards the receiving groove of the transfer arm assembly 3. When the tube column rolls along the tube rack 1-2 to the surface of the base body 1-1, it will naturally roll above the tilting plate. At this time, the drive mechanism of the tube column tilting device 1-3 is activated. The hydraulic motor drives the connecting rod to push the end of the tilting plate away from the receiving groove to rotate upwards. The tilting plate gradually forms an inclined angle. Under the thrust of the tilting plate, the tube column moves along the inclined surface of the tilting plate towards the receiving groove of the transfer arm assembly 3. When the tilting plate rotates to a preset angle, the tube column, under the combined action of thrust and gravity, falls into the receiving groove of the transfer arm assembly 3, completing the tube column pushing. Subsequently, the drive mechanism reverses its action, causing the tilting plate to return to a horizontal state, awaiting the pushing of the next tube column.

[0026] In another technical solution, the transfer arm assembly 3 includes a transfer arm body 3-1, a sliding tray 3-2, a tube-flipping device 3-3, a stop pin device 3-4, and a baffle device 3-5. The transfer arm body 3-1 has a receiving groove along its length to accommodate the tube to be transported, and its cross-section is V-shaped. The sliding tray 3-2 is movably disposed in the receiving groove of the transfer arm. The sliding tray 3-2 slides under the drive of the drive mechanism to push the tube. The tube-flipping device 3-3 is distributed on two inner inclined surfaces of the V-shaped receiving groove of the transfer arm. The tube-flipping device 3-3 includes a tube-flipping hook, the non-hook end of which is hinged to the inner inclined surface of the V-shaped receiving groove of the transfer arm. The tube-flipping hook can be rotated to restrict the tube at the bottom of the receiving groove within the tube-flipping hook. At this time, the stop pin device, which is telescopically disposed on the inner inclined surface of the V-shaped receiving groove, extends to limit and lock the tube. The transfer arm body is provided with a baffle device located at the rear end of the tube to prevent the tube from sliding downward.

[0027] In the above technical solution, the sliding tray 3-2 pushes the tube column towards the conveying end by sliding along the receiving groove; the flipping hook, through its rotational action, flips the tube column at the bottom of the receiving groove onto the inner inclined surface and limits and fixes it, realizing the layered placement and conveying of the tube column and avoiding collisions between tube columns during conveying. When the first tube column falls to the bottom of the V-shaped receiving groove, the micro hydraulic cylinder of the flipping device 3-3 is activated. The piston rod of the micro hydraulic cylinder extends, pushing the flipping hook to rotate upward around the hinge point. The hook end of the flipping hook gradually approaches the tube column, confining the tube column within the flipping hook; as the flipping hook continues to rotate, the tube column flips upward under the action of the flipping hook until it is close to resting on the inner inclined surface of the V-shaped receiving groove. At this time, the micro hydraulic cylinder stops its action, and the flipping hook maintains this state, realizing the limiting and fixing of the tube column; then the second tube column falls to the bottom of the receiving groove, keeping the second tube column in place. The tube is placed at the bottom of the receiving groove and left stationary. Then, the stop pin device on the inner slope of the side is extended to continue lowering the third tube into the groove. At this time, the stop pin device fixes the tube on the inner slope of the V-shaped receiving groove. When the tube needs to be transported, the drive mechanism of the sliding tray 3-2 is activated. The hydraulic cylinder pushes the sliding tray 3-2 to slide along the receiving groove. The sliding tray 3-2 pushes the tube at the bottom to move towards the transport end, completing the tube transport. After the tube transport is completed, the micro hydraulic cylinder is reset, and the tube flipping hook returns to its initial position under the action of the torsion spring.

[0028] In another technical solution, the pipe-flipping hook is L-shaped, with its bending angle matching the bending angle of the bottom of the V-shaped receiving groove of the transfer arm. It is recessed and embedded in the groove of the V-shaped receiving groove of the transfer arm, flush with the inner surface of the V-shaped receiving groove. When it is necessary to flip the pipe column located at the bottom of the V-shaped receiving groove to the inner inclined surface of the V-shaped receiving groove, the hook end of the pipe-flipping hook rotates upward to restrict the pipe column within the pipe-flipping hook until the pipe column is close to resting on the inner inclined surface of the V-shaped receiving groove.

[0029] In the initial state, the flipping hook is recessed into the groove of the receiving slot, which does not affect the pipe column falling to the bottom; when the pipe column needs to be flipped, the flipping hook rotates upward under the action of the driving mechanism, hooks the pipe column through the arc structure of the hook end, and drives the pipe column to flip upward until the pipe column is close to the inner inclined surface, thereby achieving the limit and fixation of the pipe column.

[0030] In another technical solution, the support arm assembly 4 includes a support arm body 4-1 and a support arm telescopic rod 4-2 disposed on the support arm body 4-1. The support arm body 4-1 is rotatably hinged to the base assembly 1. The support arm telescopic rod 4-2 is a hydraulic telescopic rod, one end of which is hinged to the support arm body 4-1, and the other end extends out of the support arm body 4-1 and is connected to the fixed end of the transfer arm assembly 3.

[0031] In the above technical solution, when the height of the transfer arm assembly 3 needs to be adjusted, the hydraulic pump is started through the hydraulic control system. High-pressure hydraulic oil enters the rodless chamber of the support arm telescopic rod 4-2 through the reversing valve, pushing the inner piston rod to extend, and the overall length of the support arm assembly 4 increases. At the same time, under the gravity and thrust of the transfer arm assembly 3, the support arm body 4-1 rotates around the hinge point of the base assembly 1, driving the transfer arm assembly 3 to slide upward along the guide rail of the ramp assembly 2 until the transfer arm assembly 3 reaches the preset height. When the height of the transfer arm assembly 3 needs to be lowered, the reversing valve switches the oil circuit, and hydraulic oil enters the rod chamber of the support arm telescopic rod 4-2, pushing the inner piston rod to retract, shortening the overall length of the support arm assembly 4. The support arm body 4-1 rotates in the opposite direction, and the transfer arm assembly 3 slides downward along the guide rail. After the transfer arm assembly 3 reaches the target position, the hydraulic control system maintains the pressure, and the support arm telescopic rod 4-2 maintains the current length, realizing the position locking of the transfer arm assembly 3. Final results: The hydraulically driven support arm telescopic rod 4-2 has high adjustment precision, enabling smooth lifting and lowering of the transfer arm assembly 3 to meet the needs of different construction heights; the hinged structure between the support arm body 4-1 and the base assembly 1, combined with the guide rail of the ramp assembly 2, ensures the stability and accuracy of the transfer arm assembly 3 during movement; the design of the seals and hydraulic control system improves the reliability and service life of the support arm assembly 4, making it suitable for long-term high-intensity construction environments.

[0032] Another technical solution provides a construction method for the aforementioned three-rail delivery and three-rail automatic catwalk, including the following steps: S1, tubing loading Multiple tubes to be transported are placed on the tube racks 1-2 on both sides of the base assembly 1. The hydraulic cylinders at the bottom of the tube racks 1-2 on both sides of the base assembly 1 are activated to adjust the tilt angle of the tube racks 1-2 so that the end of the tube rack 1-2 closer to the base body 1-1 is lower than the end farther away, forming a rolling guide slope for the tubes. This allows the first tube at the front end to roll along the tilt slope of the tube rack 1-2 to the surface of the base body 1-1. The tube flipping device 1-3 on the surface of the base assembly 1 is activated to control the end of the flipping plate away from the receiving groove to tilt upwards, pushing the first tube placed above the flipping plate towards the V-shaped receiving groove of the transfer arm assembly 3, so that the first tube falls into the bottom of the V-shaped receiving groove of the transfer arm assembly 3. S2, Tube String Limitation and Layered Delivery Once the first tube has fallen to the bottom of the V-shaped receiving groove, the tube-flipping device 3-3 inside the transfer arm assembly 3 is activated. The L-shaped tube-flipping hook on one of the inner inclined surfaces of the V-shaped receiving groove is controlled to rotate upward. The tube-flipping hook rotates out of the groove of the V-shaped receiving groove, confining the first tube inside the tube-flipping hook and flipping it upward until the first tube is close to resting on one side of the inner inclined surface of the V-shaped receiving groove. The stop pin device on that side of the inner inclined surface is then controlled to extend. At this time, the stop pin device fixes the first tube on the inner side ramp of the V-shaped receiving groove. S3. Repeat step S1 to make the second tube fall into the bottom of the V-shaped receiving groove of the transfer arm assembly 3; S4. The stop pin device on the inner inclined surface of the V-shaped receiving groove of the control transfer arm assembly extends out, and step S1 is repeated. The third tube column is limited and rolled down onto the stop pin device, thereby fixing it on the inner side ramp of the V-shaped receiving groove. S5. Job Adjustment and Adaptation By adjusting the extension and retraction of the support arm telescopic rod 4-2, the overall length of the support arm assembly 4 is changed. Combined with the rotation angle of the support arm body 4-1, the transfer arm assembly 3 is driven to slide up and down along the guide rail of the ramp assembly 2. S6, String Pushing and Transfer When the transfer arm assembly 3 slides along the guide rail of the ramp assembly 2 to the preset position, the sliding pallet 3-2 is driven to slide along the length direction in the V-shaped receiving groove. The sliding pallet 3-2 pushes the second tube column located at the bottom of the V-shaped receiving groove to move towards the conveying end along the V-shaped receiving groove. S7. Equipment Storage and Reset Control the sliding tray 3-2 to reset to the initial end of the V-shaped receiving groove, start the flipping device 3-3 to make the flipping hook rotate and reset, embedding into the groove of the V-shaped receiving groove and flush with the inner surface; control the support arm telescopic rod 4-2 to retract, driving the support arm body 4-1 to rotate in the opposite direction around the hinge point of the base assembly 1, and the transfer arm assembly 3 slides along the guide rail of the ramp assembly 2 towards the base assembly 1 until the transfer arm assembly 3 is completely locked into the receiving groove of the base assembly 1; Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A three-drop automatic catwalk, characterized by, Includes base assembly, ramp assembly, transfer arm assembly and support arm assembly; One end of the ramp assembly is inclinedly connected to the base assembly. The fixed end of the support arm assembly is rotatably hinged to the base assembly. The support arm assembly is telescopic, and its movable end is hinged to the fixed end of the transfer arm assembly. The conveying end of the transfer arm assembly rests on the guide rail of the ramp assembly. The movable end of the transfer arm assembly can move along the guide rail of the ramp assembly. The transfer arm assembly and the support arm assembly can rotate until the transfer arm assembly is engaged in the receiving groove inside the base assembly. The transfer arm assembly is provided with a receiving groove for accommodating multiple tube columns to be conveyed.

2. The trip-3 auto catwalk of claim 1, wherein, The base assembly includes a base body and a tube rack; the base assembly has a receiving groove along its length direction, and the tube rack is hinged to both sides of the base body along its length direction. A hydraulic cylinder is provided at the bottom of the tube rack. By controlling the extension and retraction of the hydraulic cylinder, the tilt angle of the tube rack is adjusted so that the end of the tube rack near the base body is lower, so that the tube column to be transported on the tube rack can roll along the tube rack onto the base body.

3. The trip-3 auto cat for three strands as claimed in claim 2 wherein, The base assembly also includes a column flipping device disposed on the surface of the base assembly and located on both sides of the receiving groove of the base assembly. The column flipping device includes a flipping plate, one end of which is hinged to the surface of the base assembly near the receiving groove, and the other end of which is rotatable to tilt upwards, thereby pushing the column placed on it toward the receiving groove of the transfer arm assembly.

4. The trip-3 auto catwalk of claim 1, wherein, The transfer arm assembly includes a transfer arm body, a sliding tray, a stop pin device, a baffle device, and a tube-flipping device. The transfer arm body has a receiving groove along its length to accommodate the tube to be transported, and its cross-section is V-shaped. The sliding tray is movably disposed in the receiving groove of the transfer arm. The sliding tray slides under the drive of the drive mechanism to push the tube. The tube-flipping device is distributed on two inner inclined surfaces of the V-shaped receiving groove of the transfer arm. The tube-flipping device includes a tube-flipping hook, the non-hook end of which is hinged to the inner inclined surface of the V-shaped receiving groove of the transfer arm. The tube-flipping hook can be rotated to restrict the tube at the bottom of the receiving groove within the tube-flipping hook. At this time, the stop pin device, which is telescopically disposed on the inner inclined surface of the V-shaped receiving groove, extends to limit and lock the tube. The transfer arm body is provided with a baffle device located at the rear end of the tube to prevent the tube from sliding downward.

5. The trip-3 auto cat for three strands as claimed in claim 4, wherein, The flipping hook is L-shaped, with its bending angle matching the bending angle of the bottom of the V-shaped receiving groove of the transfer arm. It is recessed and embedded in the groove of the V-shaped receiving groove of the transfer arm, flush with the inner surface of the V-shaped receiving groove. When it is necessary to flip the tube at the bottom of the V-shaped receiving groove to the inner inclined surface of the V-shaped receiving groove, the hook end of the flipping hook rotates upward to restrict the tube within the flipping hook until the tube is close to resting on the inner inclined surface of the V-shaped receiving groove.

6. The automatic catwalk for feeding three cables and throwing three cables according to claim 1, characterized in that, The support arm assembly includes a support arm body and a support arm telescopic rod disposed on the support arm body. The support arm body is rotatably hinged to the base assembly. The support arm telescopic rod is a hydraulic telescopic rod, with one end hinged to the support arm body and the other end extending out of the support arm body and connected to the fixed end of the transfer arm assembly.

7. The construction method for the automatic catwalk with three feeders and three dropers as described in any one of claims 1-6, characterized in that, Includes the following steps: S1, tubing loading Multiple tubes to be transported are placed on the tube racks on both sides of the base assembly. The hydraulic cylinders at the bottom of the tube racks on both sides of the base assembly are activated to adjust the tilt angle of the tube racks so that the end of the tube rack closer to the base body is lower than the end farther away, forming a rolling guide slope for the tubes. This allows the first tube at the front to roll along the tilt slope of the tube rack to the surface of the base body. The tube flipping device on the surface of the base assembly is activated to control the end of the flipping plate away from the receiving groove to tilt upwards, pushing the first tube placed above the flipping plate towards the V-shaped receiving groove of the transfer arm assembly, so that the first tube falls into the bottom of the V-shaped receiving groove of the transfer arm assembly. S2, Tube String Limitation and Layered Delivery Once the first tube has fallen to the bottom of the V-shaped receiving groove, the tube-flipping device inside the transfer arm assembly is activated. The L-shaped tube-flipping hook on one of the inner inclined surfaces of the V-shaped receiving groove is controlled to rotate upward. The tube-flipping hook rotates out of the groove of the V-shaped receiving groove, confining the first tube within the tube-flipping hook and flipping it upward until the first tube is close to resting on one side of the inner inclined surface of the V-shaped receiving groove. The stop pin device on that side of the inner inclined surface is then controlled to extend. At this time, the stop pin device fixes the first tube on the inner side ramp of the V-shaped receiving groove. S3. Repeat step S1 to make the second tube fall into the bottom of the V-shaped receiving groove of the transfer arm assembly; S4. The stop pin device on the inner inclined surface of the V-shaped receiving groove of the control transfer arm assembly extends out, and step S1 is repeated. The third tube column is limited and rolled down onto the stop pin device, thereby fixing it on the inner side ramp of the V-shaped receiving groove. S5. Job Adjustment and Adaptation By adjusting the extension and retraction of the support arm telescopic rod, the overall length of the support arm assembly is changed. Combined with the rotation angle of the support arm body, the transfer arm assembly is driven to slide up and down along the ramp assembly guide rail. S6, String Pushing and Transfer When the transfer arm assembly slides along the ramp assembly guide rail to the preset position, the drive sliding tray slides along the length direction in the V-shaped receiving groove, and the sliding tray pushes the tube column located at the bottom of the V-shaped receiving groove to move towards the conveying end along the V-shaped receiving groove; S7. Equipment Storage and Reset Control the sliding tray to return to the initial end of the V-shaped receiving groove, start the pipe flipping device to make the pipe flipping hook rotate and return to the original position, embedding into the groove of the V-shaped receiving groove and flush with the inner surface; control the extension rod of the support arm to retract, driving the main body of the support arm to rotate in the opposite direction around the hinge point of the base assembly, and the transfer arm assembly slides along the guide rail of the ramp assembly towards the base assembly until the transfer arm assembly is completely locked into the receiving groove of the base assembly.

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