A cantilevered track walking pipe rack device

Abstract

The application provides a cantilever track walking pipe conveying device, and relates to the technical field of pipe rod conveying equipment for oil drilling and well repairing operations, which comprises a catwalk, the catwalk comprising a rack, a conveying arm and a follow-up trolley, the first end of the conveying arm being rotatably connected to one end of the rack; the follow-up trolley is movably connected to the conveying arm, and the follow-up trolley can reciprocate along the conveying arm; the follow-up trolley comprises a mode switching unit, the mode switching unit comprising a first ratchet, a first spring, a second ratchet, a second spring and a mode switching hydraulic cylinder. The application provides a follow-up trolley with a novel structure, and the speed of movement along the conveying arm is matched with the speed of lifting or lowering the pipe rod by the elevator.

Description

Technical Field

[0001] This invention relates to the technical field of pipe and rod discharge and conveying equipment for oil drilling and well workover operations, specifically to a cantilevered track-walking pipe discharge device. Background Technology

[0002] During oil drilling and workover operations, a large number of drill pipes, casing pipes, and other tubing are required. Traditionally, this was done manually, involving the handling and loading / unloading of these tubing onto and off the drilling rig, which was labor-intensive and posed significant safety risks. Therefore, mechanized equipment has gradually emerged to replace manual labor in this handling and transportation work, leading to the widespread use of overhead cranes and rails in oil drilling and production equipment.

[0003] To prevent damage from slippage of the pipe threads, a trolley is usually installed on the mechanized catwalk equipment. The trolley can slide the pipe along the conveying arm (a type of guide rail) of the drill string device to the wellhead position.

[0004] During pipe laying operations, the pipe rod needs to be transported from the ground to the center of the wellhead and lowered into the well. First, a pulley is used to push the pipe rod to a height that the lifting clamp can hold. Then, the lifting clamp receives the pipe rod sent by the pulley and lifts the pipe rod to a vertical position. Only then can the vertically positioned pipe rod be lowered into the well.

[0005] During pipe pulling operations, the pipe rod inside the well needs to be lifted up and then moved away by a sliding trolley. That is, the lifting clamp places the threaded end of the pipe rod after it has been lifted up from the well onto the trolley, and then the lifting clamp moves down in coordination with the trolley moving backward (away from the drill platform) until the other end of the pipe rod is placed back on the conveyor arm. Then the trolley is used to drag the pipe rod to the bottom of the conveyor arm.

[0006] When the lifting clamp raises or lowers the pipe rod, the speed of the lifting clamp is not constant, which causes the speed at which the lower end of the pipe rod moves along the conveyor arm to be inconsistent. The speed at which the trolley moves along the conveyor arm is difficult to match with the speed at which the lifting clamp raises or lowers the pipe rod. Summary of the Invention

[0007] This invention addresses the aforementioned technical problems in the prior art by providing a cantilevered track-based pipe-laying device and a novel follower trolley structure, wherein the speed of movement along the conveyor arm matches the speed at which the lifting or lowering of the pipe rod is achieved by the lifting clamp.

[0008] To achieve the above technical objectives, embodiments of the present invention provide a cantilevered track-walking pipe laying device, comprising: The system includes a catwalk, which comprises a frame, a conveyor arm, and a follower trolley. The first end of the conveyor arm is rotatably connected to one end of the frame. The follower trolley is movably connected to the conveyor arm and can reciprocate along the conveyor arm. The cat walkway also includes a chain drive unit, which includes a drive chain, a drive sprocket, and a driven sprocket; the drive sprocket is rotatably disposed at one end of the conveyor arm, and the driven sprocket is rotatably disposed at the other end of the conveyor arm; the drive chain passes around the drive sprocket and the driven sprocket. The follower trolley further includes a first sprocket, a second sprocket, and a third sprocket; the transmission chain passes sequentially around the first sprocket, the second sprocket, and the third sprocket; The follower trolley also includes a drive shaft and a ratchet, with the second sprocket and the ratchet respectively fixedly connected to the drive shaft; The follower trolley further includes a mode switching unit, which includes a first ratchet, a first spring, a second ratchet, a second spring, and a mode switching cylinder. The first ratchet and the second ratchet are supported for rotation, and the free ends of the first ratchet and the second ratchet can engage with the ratchet wheel. The first ratchet is used to limit the ratchet wheel to rotate only counterclockwise; the second ratchet is used to limit the ratchet wheel to rotate only clockwise; the first spring is used to provide an elastic force to the free end of the first ratchet wheel near the ratchet wheel; the second spring is used to provide an elastic force to the free end of the second ratchet wheel near the ratchet wheel. The mode switching cylinder is located between the first ratchet and the second ratchet; the mode switching cylinder is a single-cylinder double-acting cylinder; when the piston rod of the mode switching cylinder is at the first extreme position, its first output end extends to push the free end of the first ratchet to disengage from the ratchet; when the piston rod of the mode switching cylinder is at the second extreme position, its second output end extends to push the free end of the second ratchet to disengage from the ratchet; when the piston rod of the mode switching cylinder is in the middle position, the free ends of both the first ratchet and the second ratchet are engaged with the ratchet.

[0009] In some embodiments, the system further includes a three-position four-way directional valve, wherein the A port of the three-position four-way directional valve is connected to the X port of the mode switching cylinder; the B port of the three-position four-way directional valve is connected to the Y port of the mode switching cylinder; and the neutral position function of the three-position four-way directional valve is P-type.

[0010] In some embodiments, the system further includes a friction wheel and a friction block, wherein the friction wheel is fixedly connected to the drive shaft and the friction block abuts against the outer circumference of the friction wheel.

[0011] In some embodiments, the device further includes a common base, a first pipe gripping mechanism, and a second pipe gripping mechanism. The upper side of the common base has a first placement area, a second placement area, and a third placement area arranged in parallel with its extending direction. The first placement area is located between the second placement area and the third placement area. The catwalk is located in the first placement area. The cantilevered track walking pipe arrangement device includes a working state and a folded state. In the working state, both the first pipe gripping mechanism and the second pipe gripping mechanism are arranged perpendicular to the length direction of the common base. The end of the first pipe gripping mechanism is connected to one end of the common base in the length direction; the end of the second pipe gripping mechanism is connected to the other end of the common base in the length direction; in the working state, the first pipe gripping mechanism and the second pipe gripping mechanism are located on the same side in the width direction of the common base. In the folded state, the first tube gripping mechanism is located in the second placement area; the second tube gripping mechanism is located in the third placement area.

[0012] In some embodiments, the first pipe gripping mechanism includes a first guide rail, a first column, and a first crossbeam; the end of the first crossbeam is vertically movably connected to the first column, and the lower end of the first column is horizontally movably connected to the first guide rail. The second pipe gripping mechanism includes a second guide rail, a second column, and a second crossbeam. The end of the second crossbeam is vertically movable to the second column, and the lower end of the second column is horizontally movable to the second guide rail.

[0013] In some embodiments, in the working state, the first crossbeam is located on the side of the first column facing the second pipe gripping mechanism; the second crossbeam is located on the side of the second column facing the first pipe gripping mechanism. In the folded state, the first crossbeam is located on the side of the first column facing the second pipe gripping mechanism; the second crossbeam is located on the side of the second column facing the first pipe gripping mechanism.

[0014] In some embodiments, in the working state, the free end of the first crossbeam is connected to one end of the third crossbeam by two pins spaced apart in the vertical direction. The free end of the second crossbeam is connected to one end of the fourth crossbeam by two pins spaced apart in the vertical direction.

[0015] In some embodiments, a first ear seat is provided on the upper side of the middle portion of the second crossbeam; a fourth ear seat is provided on the free end of the fourth crossbeam; in the folded state, after the pin on the lower side is removed, the free end of the fourth crossbeam rotates to the upper side of the second crossbeam; the fourth ear seat is connected to the first ear seat pin.

[0016] In some embodiments, a clamping unit is fixedly provided at the free end of the third crossbeam and the free end of the fourth crossbeam.

[0017] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The present invention provides a new type of follower trolley, the speed of which moves along the conveyor arm is matched with the speed of the lifting or lowering of the pipe rod by the hoist. Attached Figure Description

[0018] Figure 1 This is a front view of a cantilevered track-walking pipe laying device according to an embodiment of the present invention.

[0019] Figure 2 This is a left view of a cantilevered track-walking pipe laying device according to an embodiment of the present invention.

[0020] Figure 3 This is a top view of a cantilevered track-walking pipe laying device according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the common base and catwalk in a cantilevered track walking pipe laying device according to an embodiment of the present invention.

[0022] Figure 5 This is a structural schematic diagram of the working state of the pipe-grabbing mechanism in a cantilevered track-walking pipe-laying device according to an embodiment of the present invention.

[0023] Figure 6 for Figure 5 A magnified view of a portion of the image (A) is shown, and an exploded view is also provided.

[0024] Figure 7 This is a schematic diagram of the folded state of the pipe-grabbing mechanism in a cantilevered track-walking pipe-laying device according to an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the folded state of a cantilevered track-walking pipe laying device according to an embodiment of the present invention.

[0026] Figure 9 for Figure 1 A magnified view of a portion of the image, shown in Figure B.

[0027] Figure 10 This is a schematic diagram of the connection structure between the follower trolley and the chain drive unit in a cantilevered track walking pipe laying device according to an embodiment of the present invention.

[0028] Figure 11 This is a schematic diagram of the drive shaft in a cantilevered track-type pipe-laying device according to an embodiment of the present invention.

[0029] Figure 12 This is a schematic diagram illustrating the principle of the mode switching unit in the first state in a cantilevered track walking pipe laying device according to an embodiment of the present invention.

[0030] Figure 13 and Figure 14This is a schematic diagram illustrating the working principle of the cantilevered track-walking pipe laying device in the upper pipe mode according to an embodiment of the present invention.

[0031] Figure 15 and Figure 16 This is a schematic diagram illustrating the working principle of the cantilevered track-walking pipe laying device in the pipe lowering mode according to an embodiment of the present invention.

[0032] Figure 17 This is a state diagram of the cantilevered track walking pipe laying device during pipe lifting operation according to an embodiment of the present invention.

[0033] Figure 18 This is a schematic diagram illustrating the control principle of a cantilevered track-walking pipe laying device according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures 1-Common base, 101-First placement area, 102-Second placement area, 103-Third placement area, 2-Catway, 201-Frame, 202-Conveyor arm, 3-First guide rail, 4-Second guide rail, 5-First upright, 6-Second upright, 7-First crossbeam, 8-Second crossbeam, 801-First ear seat, 802-Second ear seat, 803-Third ear seat, 9-Third crossbeam, 10-Clamping unit, 11-First pipe gripping mechanism, 12-Second pipe gripping mechanism, 13-Fourth crossbeam, 1301-Fourth ear seat, 1302-Fifth ear seat, 1303-Sixth ear seat, 14-Pipe rack support; 15-Follow-up trolley, 1501 1502-First sprocket, 1503-Second sprocket, 1504-Third sprocket, 1505-Drive shaft, 1506-Ratchet, 1507-Friction wheel, 1508-First ratchet, 1509-First spring, 1510-Second spring, 1511-Second ratchet, 1512-Mode switching cylinder, 15121-First output end, 15122-Second output end, 1513-Three-position four-way directional valve, 16-Chain drive unit, 1601-Drive chain, 1602-Drive sprocket, 1603-Driven sprocket, 17-Proximity sensor, 18-Pipe rod, 19-Control element, 20-Drive assembly. Detailed Implementation

[0035] Other objects and advantages of the present invention will become clear by explaining the preferred embodiments of the present application below.

[0036] First Implementation Method

[0037] like Figure 1 As shown, a cantilevered track-walking pipe laying device includes a catwalk 2, which includes a frame 201, a conveyor arm 202, and a follower trolley 15.

[0038] The conveying arm 202 has a first end and a second end that are arranged opposite to each other. The first end is rotatably connected to one end of the frame 201. The second end of the conveying arm 202 can rotate upward around its first end to a certain angle, so as to facilitate the conveying of the pipe rod to the position where the hanger can clamp it.

[0039] The follower trolley 15 is movably connected to the conveyor arm 202, and the follower trolley 15 can reciprocate along the conveyor arm 202. For example, rollers can be installed on the follower trolley 15 and a track can be set on the conveyor arm 202. The reciprocating movement of the follower trolley 15 is achieved through the cooperation of the rollers and the track.

[0040] Please refer to Figure 9 and Figure 10 As shown, the catwalk 2 also includes a chain drive unit 16, which includes a drive chain 1601, a drive sprocket 1602, and a driven sprocket 1603. The drive sprocket 1602 is rotatably disposed at one end of the conveyor arm 202, and the driven sprocket 1603 is rotatably disposed at the other end of the conveyor arm 202. The drive chain 1601 passes around the drive sprocket 1602 and the driven sprocket 1603, and meshes with the drive sprocket 1602 and the driven sprocket 1603 respectively. The rotation of the drive sprocket 1602 can drive the follower trolley 15 to reciprocate along the conveyor arm 202. This embodiment also includes a drive assembly 20, which is used to drive the drive sprocket 1602 to reciprocate. The drive assembly 20 can be, for example, a geared motor, a combination of a motor and a gearbox, or a combination of a hydraulic motor and a gearbox.

[0041] For connection with drive train 1601, such as Figure 10 As shown, the follower trolley 15 also includes a first sprocket 1501, a second sprocket 1502, and a third sprocket 1503. The drive chain 1601 sequentially passes around the first sprocket 1501, the second sprocket 1502, and the third sprocket 1503. For example, the second sprocket 1502 is disposed between the first sprocket 1501 and the third sprocket 1503, and the central axis of the second sprocket 1502 is not on the same plane as the central axes of the first sprocket 1501 and the third sprocket 1503, thereby enabling the drive chain 1601 to form a large wrap angle on the second sprocket 1502, resulting in a stable and reliable connection.

[0042] like Figure 11As shown, the follower trolley 15 also includes a drive shaft 1504 and a ratchet 1505. The second sprocket 1502 and the ratchet 1505 are coaxially and fixedly connected to the drive shaft 1504, so that the rotation direction of the second sprocket 1502 can be limited by limiting the rotation direction of the ratchet 1505. When the rotation of the ratchet 1505 in one direction is limited, the drive chain 1601 can drive the follower trolley 15 to move in one direction. When the rotation of the ratchet 1505 in both clockwise and counterclockwise directions is limited, the drive chain 1601 can drive the follower trolley 15 to move reciprocally in both directions. like Figure 12 As shown, the follower trolley 15 also includes a mode switching unit. The mode switching unit includes a first ratchet 1508, a first spring 1509, a second ratchet 1511, and a second spring 1510. The first ratchet 1508 and the second ratchet 1511 are supported for rotation. The free ends of the first ratchet 1508 and the second ratchet 1511 can engage with the ratchet 1505. The first ratchet 1508 limits the ratchet 1505 to rotate only counterclockwise; the second ratchet 1511 limits the ratchet 1505 to rotate only clockwise. The first spring 1509 provides an elastic force to the free end of the first ratchet 1508 near the ratchet 1505; the second spring 1510 provides an elastic force to the free end of the second ratchet 1511 near the ratchet 1505.

[0043] To selectively control the engagement of the first ratchet 1508 and the second ratchet 1511 with the ratchet 1505, this embodiment also includes a mode switching cylinder 1512. The mode switching cylinder 1512 is located between the first ratchet 1508 and the second ratchet 1511.

[0044] The mode switching cylinder 1512 is a single-cylinder double-acting cylinder, that is, the piston rod of the mode switching cylinder 1512 has a first output end and a second output end. By inputting hydraulic oil into one side of the mode switching cylinder, the output end on the other side can be extended.

[0045] In some embodiments, the system further includes a three-position four-way directional valve 1513, wherein the A port of the three-position four-way directional valve 1513 is connected to the X port of the mode switching cylinder 1512; the B port of the three-position four-way directional valve 1513 is connected to the Y port of the mode switching cylinder 1512; and the neutral position function of the three-position four-way directional valve is P-type.

[0046] Figure 12 The medium mode switching unit is in the first state, which is suitable when the pipe rod is not lifted by the lifting clamp or the pipe rod has been released; Figure 14 The medium mode switching unit is in the second state, which is suitable for the follower trolley 15 to move upward; Figure 16 The medium mode switching unit is in the third state, which is suitable for the follower trolley 15 to follow downward.

[0047] Specifically, such as Figure 12 In the first state shown, when the three-position four-way directional valve 1513 is in the neutral position, both ends of the piston rod of the mode switching cylinder 1512 are subjected to the same hydraulic pressure, and the piston rod is in the middle position. The free ends of the first ratchet 1508 and the second ratchet 1511 are engaged with the ratchet 1505. That is, the ratchet 1505 is locked in both directions, which also means that the second sprocket 1502 is locked (i.e., cannot rotate). (See reference...) Figure 10 The chain drive unit 16 can drive the follower trolley 15 to deliver the tube rod to the right or left.

[0048] like Figure 14 In the second state shown, with the valve core of the three-position four-way directional valve 1513 in the left position and the piston rod of the mode switching cylinder 1512 in the first extreme position, its first output end 15121 extends to push the free end of the first ratchet 1508 out of engagement with the ratchet 1505. At this time, the ratchet 1505 can only rotate clockwise. Please refer to... Figure 13 At this time, the drive sprocket 1602 rotates clockwise, and the transmission chain 1601 tends to pull the second sprocket 1502 to rotate counterclockwise. However, the second sprocket 1502 is restricted by the ratchet 1505 and the second ratchet 1511 and cannot rotate counterclockwise. Therefore, the transmission chain 1601 pulls the follower trolley 15 to the right, conveying the pipe towards the wellhead. Referring again to Figure 17, the clamp (existing technology, not shown in the figure) holds the right end of the pipe and pulls the pipe upward and to the right. The lower end of the pipe is supported by the follower trolley 15. The follower trolley 15 moves to the right with the pipe, and as mentioned above, the clockwise rotation of the sprocket 1502 is free, thus realizing that the follower trolley 15 moves to the right with the lower end of the pipe, realizing the follower function during pipe laying operations.

[0049] like Figure 16 In the third state shown, when the piston rod of the mode switching cylinder 1512 is at its second limit position, its second output end 15122 extends to disengage the free end of the second ratchet 1511 from the ratchet 1505. The ratchet 1505 is only allowed to rotate counterclockwise. Similarly, the second sprocket 1502 can only rotate counterclockwise. When the lifting clamp lowers the tube rod, the lower end of the tube rod is supported on the follower trolley 15. At this time, refer to Figure 15 As shown, the follower trolley 15 moves to the left, while the counterclockwise rotation of the second sprocket 1502 is permitted. Therefore, the follower trolley 15 can move to the left as the lifting clamp moves down, thus realizing the follower function during pipe lifting operations.

[0050] In some embodiments, the system also includes a friction wheel 1506 and a friction block 1507. The friction wheel 1506 is fixedly connected to the drive shaft 1504, and the friction block 1507 abuts against the outer circumference of the friction wheel 1506 to provide friction for the rotation of the second sprocket 1502 and prevent the follower pulley from sliding freely downward under its own weight and the weight of the pipe rod during the pipe lifting operation.

[0051] In addition, to further improve safety, in this embodiment, a proximity sensor 17 is provided at the right end of the conveying arm 202. During pipe lowering operations, when the pipe is not lifted by the hoist, the proximity sensor 17 can detect the pipe. During pipe lifting operations, when the pipe is placed onto the conveying arm 202 by the hoist, the proximity sensor 17 can also detect the pipe. The proximity sensor 17 is signal-connected to the control element 19, and the control element 19 is signal-connected to the three-position four-way directional valve 1513. At this time, the three-position four-way directional valve 1513 is a three-position four-way electro-hydraulic directional valve.

[0052] During pipe hoisting operations, when the hoist places the pipe rod onto the conveyor arm 202, the proximity sensor 17 detects the pipe rod and sends a signal to the control element 19. The control element 19 then further controls the valve core of the three-position four-way directional valve 1513 to switch to the desired position. Figure 12 The diagram shows the neutral position. At this time, the piston rod of the mode switching cylinder 1512 is also in the neutral position, and the bidirectional rotation of the ratchet 1505 is restricted. Therefore, the tube can only move to the left under the drive of the drive assembly 20, increasing the risk of the tube slipping under its own weight during equipment use.

[0053] Similarly, during pipe laying operations, the mode switching unit first enters a state such as... Figure 12 The first state is shown. Drive assembly 20 drives the chain drive unit and follower trolley 15 to transport the tube rod to the upper right. After the hanger clamps the right end of the tube rod and lifts it upwards, proximity sensor 17 detects that the right end of the tube rod has left and sends a signal to control element 19. Control element 19 further controls the mode switching unit to switch to... Figure 14 In the second state shown, the follower trolley 15 can move to the upper right following the lower end of the tube rod.

[0054] Second Implementation Method

[0055] like Figures 1 to 4 As shown, a cantilevered track-type pipe-laying device includes a common base 1, a catwalk 2, a first pipe-grabbing mechanism 11, and a second pipe-grabbing mechanism 12. The upper side of the common base 1 has a first placement area 101, a second placement area 102, and a third placement area 103 arranged parallel to each other in the same direction of extension. The first placement area 101 is located between the second placement area 102 and the third placement area 103. The catwalk 2 is located in the first placement area 101.

[0056] Furthermore, the second placement area 102 and the third placement area 103 are symmetrically arranged on the left and right sides of the first placement area 101.

[0057] In some embodiments, the cantilevered track-walking pipe laying device includes a working state and a folded state.

[0058] In operation, both the first pipe gripping mechanism 11 and the second pipe gripping mechanism 12 are arranged perpendicular to the length direction of the common base 1. The end of the first pipe gripping mechanism 11 is connected to one end of the common base 1 along its length, and the end of the second pipe gripping mechanism 12 is connected to the other end of the common base 1 along its length. Multiple pipe support brackets 14 are arranged in parallel in the middle area between the first pipe gripping mechanism 11 and the second pipe gripping mechanism 12.

[0059] The first pipe-grabbing mechanism 11 and the second pipe-grabbing mechanism 12 operate synchronously and in coordination. The first pipe-grabbing mechanism 11 grabs one end of the pipe rod, and the second pipe-grabbing mechanism 12 grabs the other end of the pipe rod.

[0060] During the pipe-running operation, the first pipe-grabbing mechanism 11 and the second pipe-grabbing mechanism 12 grab the pipe rod from the pipe support 14 and transport it to the catwalk 2. The catwalk 2 then transports the pipe rod further toward the drilling rig or workover rig.

[0061] During the pipe lifting operation, the catwalk 2 places the pipe rods delivered by the drilling rig or workover rig one by one onto the pipe support 14.

[0062] like Figure 8 As shown, in the folded state, the first tube gripping mechanism 11 is located in the second placement area 102; the second tube gripping mechanism 12 is located in the third placement area 103. This allows the common base 1, cat walkway 2, first tube gripping mechanism 11, and second tube gripping mechanism 12 to be transported as a whole, improving the convenience of transportation.

[0063] like Figure 3 As shown, in some embodiments, in the working state, the first pipe gripping mechanism 11 and the second pipe gripping mechanism 12 are located on the same side in the width direction of the common base 1, so that when the first pipe gripping mechanism 11 grips one end of the pipe rod, the second pipe gripping mechanism 12 can grip the second end of the pipe rod.

[0064] like Figures 1 to 3As shown, in some embodiments, the first pipe-gripping mechanism 11 includes a first guide rail 3, a first column 5, and a first crossbeam 7. The end of the first crossbeam 7 is vertically movably connected to the first column 5. For example, rollers can be installed at the end of the first crossbeam 7, and a vertically extending track can be installed on the first column 5 to achieve the vertically movable connection between the first crossbeam 7 and the first column 5. Alternatively, a vertically extending linear guide rail can be installed on the first column 5, and a slider can be installed on the first crossbeam 7, with the slider vertically movably connected to the linear guide rail. Furthermore, the first crossbeam 7 can be driven to move vertically along the first column 5 via a chain drive mechanism or a rack and pinion mechanism.

[0065] The lower end of the first column 5 is horizontally movable to the first guide rail 3. For example, a roller can be installed at the lower end of the first column 5, and this roller is connected to the first guide rail 3, thus enabling the first column 5 and the first guide rail 3 to be horizontally movable. Alternatively, a motor can be installed on the first column 5, and a sprocket can be installed on the output end of the motor. This sprocket meshes with a chain mounted on the first guide rail 3, extending in the same direction as the first guide rail 3 and fixedly connected to it. The motor can then drive the first column 5 to move horizontally back and forth along the first guide rail 3.

[0066] In some embodiments, the second pipe gripping mechanism 12 includes a second guide rail 4, a second column 6, and a second crossbeam 8. The end of the second crossbeam 8 is vertically movably connected to the second column 6, and the lower end of the second column 6 is horizontally movably connected to the second guide rail 4. The structure of the second pipe gripping mechanism 12 is similar to that of the first pipe gripping mechanism 11, and will not be described in detail here.

[0067] In some embodiments, in the working state, the first crossbeam 7 is located on the side of the first column 5 facing the second pipe gripping mechanism 12; the second crossbeam 8 is located on the side of the second column 6 facing the first pipe gripping mechanism 11. This structure facilitates the synchronous and coordinated gripping of the pipe rod by the first pipe gripping mechanism 11 and the second pipe gripping mechanism 12.

[0068] like Figure 8 As shown, in some embodiments, in the folded state, the first crossbeam 7 is located on the side of the first column 5 facing the second pipe gripping mechanism 12; the second crossbeam 8 is located on the side of the second column 6 facing the first pipe gripping mechanism 11. This structure avoids the technical problem of increased floor space caused by placing the first crossbeam 7 and the second crossbeam 8 on the outside of the common base 1, saving space and making it easy to transport.

[0069] like Figure 5 and Figure 6 As shown, in some embodiments, the free end of the first crossbeam 7 is connected to one end of the third crossbeam 9 by two pins spaced apart in the vertical direction. This structure enables the first crossbeam 7 to provide stable and reliable support for the third crossbeam 9.

[0070] In some embodiments, the free end of the second crossbeam 8 is connected to one end of the fourth crossbeam 13 by two pins spaced apart in the vertical direction; this structure enables the second crossbeam 8 to provide stable and reliable support for the fourth crossbeam 13.

[0071] Specifically, such as Figure 6 As shown, the connection structure between the second crossbeam 8 and the fourth crossbeam 13 is illustrated as an example. A second ear seat 802 and a third ear seat 803 are fixedly installed at the free end of the second crossbeam 8, with the second ear seat 802 positioned directly above the third ear seat 803. Correspondingly, a fifth ear seat 1302 and a sixth ear seat 1303 are provided at the end of the fourth crossbeam 13, arranged vertically. In the above-described working state, the second ear seat 802 and the fifth ear seat 1302 are connected by a first pin a; the third ear seat 803 and the sixth ear seat 1303 are connected by a second pin b.

[0072] like Figure 7 As shown, in the folded state, after the lower pin (i.e., the second pin b) is removed, the free end of the fourth crossbeam 13 rotates around the first pin a to the upper side of the second crossbeam 8. This structure reduces the overall length of the crossbeams, making the equipment easier to transport. Similarly, the first crossbeam 7 and the third crossbeam 9 have similar connection structures, which will not be described in detail here.

[0073] In some embodiments, a first ear seat 801 is provided on the upper side of the middle part of the second crossbeam 8; a fourth ear seat 1301 is provided on the upper side of the free end of the fourth crossbeam 13; in the folded state, the fourth ear seat 1301 is connected to the first ear seat 801 by a second pin b. This structure effectively shortens the total length of the crossbeam in the folded state and achieves a reliable connection between the second crossbeam 8 and the fourth crossbeam 13 by the second pin b.

[0074] In some embodiments, a clamping unit 10 is fixedly provided at the free end of the third crossbeam 9 and the free end of the fourth crossbeam 13. The clamping unit 10 is used to clamp the tube rod.

[0075] The apparatus of this application has been described in detail with reference to the preferred technical solutions. However, it should be noted that, without departing from the spirit of this application, those skilled in the art can make any modifications, alterations, and variations based on the above disclosure. This application includes the above-described specific embodiments and any equivalent forms thereof.

Claims

1. A cantilevered track-based pipe-laying device, characterized in that, include: The system includes a catwalk (2), which includes a frame (201), a conveyor arm (202), and a follower trolley (15). The first end of the conveyor arm (202) is rotatably connected to one end of the frame (201). The follower trolley (15) is movably connected to the conveyor arm (202) and can reciprocate along the conveyor arm (202). The cat walkway (2) also includes a chain drive unit (16), which includes a drive chain (1601), a drive sprocket (1602), and a driven sprocket (1603). The drive sprocket (1602) is rotatably disposed at one end of the conveyor arm (202), and the driven sprocket (1603) is rotatably disposed at the other end of the conveyor arm (202). The drive chain (1601) passes around the drive sprocket (1602) and the driven sprocket (1603). The follower trolley (15) further includes a first sprocket (1501), a second sprocket (1502), and a third sprocket (1503); the transmission chain (1601) passes sequentially around the first sprocket (1501), the second sprocket (1502), and the third sprocket (1503). The follower trolley (15) further includes a drive shaft (1504) and a ratchet (1505), wherein the second sprocket (1502) and the ratchet (1505) are fixedly connected to the drive shaft (1504) respectively; The follower trolley (15) further includes a mode switching unit, which includes a first ratchet (1508), a first spring (1509), a second ratchet (1511), a second spring (1510), and a mode switching cylinder (1512). The first ratchet (1508) and the second ratchet (1511) are supported to be rotatable, and the free ends of the first ratchet (1508) and the second ratchet (1511) can interact with the ratchet (1505). Engagement; the first ratchet (1508) is used to limit the ratchet (1505) to rotate only counterclockwise; the second ratchet (1511) is used to limit the ratchet (1505) to rotate only clockwise; the first spring (1509) is used to provide an elastic force to the free end of the first ratchet (1508) near the ratchet (1505); the second spring (1510) is used to provide an elastic force to the free end of the second ratchet (1511) near the ratchet (1505); The mode switching cylinder (1512) is located between the first ratchet (1508) and the second ratchet (1511); the mode switching cylinder (1512) is a single-cylinder double-acting cylinder; when the piston rod of the mode switching cylinder (1512) is in the first extreme position, its first output end (15121) extends to push the free end of the first ratchet (1508) to disengage from the ratchet (1505); when the piston rod of the mode switching cylinder (1512) is in the second extreme position, its second output end (15122) extends to push the free end of the second ratchet (1511) to disengage from the ratchet (1505); when the piston rod of the mode switching cylinder (1512) is in the middle position, the free ends of both the first ratchet (1508) and the second ratchet (1511) are engaged with the ratchet (1505).

2. The cantilevered track-walking pipe laying device as described in claim 1, characterized in that, It also includes a three-position four-way directional valve (1513), the A port of which is connected to the X port of the mode switching cylinder (1512); the B port of which is connected to the Y port of the mode switching cylinder (1512); and the middle position function of the three-position four-way directional valve is P type.

3. The cantilevered track-walking pipe laying device as described in claim 1, characterized in that, It also includes a friction wheel (1506) and a friction block (1507), wherein the friction wheel (1506) is fixedly connected to the drive shaft (1504), and the friction block (1507) abuts against the outer circumference of the friction wheel (1506).

4. The cantilevered track-walking pipe laying device as described in claim 1, characterized in that, It also includes a common base (1), a first pipe gripping mechanism (11), and a second pipe gripping mechanism (12). The upper side of the common base (1) has a first placement area (101), a second placement area (102), and a third placement area (103) arranged in parallel with its extension direction. The first placement area (101) is located between the second placement area (102) and the third placement area (103). The cat walkway (2) is located in the first placement area (101). The cantilevered track walking pipe arrangement device includes a working state and a folded state. In the working state, the first pipe gripping mechanism (11) and the second pipe gripping mechanism (12) are both arranged perpendicular to the length direction of the common base (1). The end of the first pipe gripping mechanism (11) is connected to one end of the length direction of the common base (1); the end of the second pipe gripping mechanism (12) is connected to the other end of the length direction of the common base (1); in the working state, the first pipe gripping mechanism (11) and the second pipe gripping mechanism (12) are located on the same side of the width direction of the common base (1); In the folded state, the first tube gripping mechanism (11) is located in the second placement area (102); the second tube gripping mechanism (12) is located in the third placement area (103).

5. The cantilevered track-type pipe-laying device according to claim 4, characterized in that, The first pipe gripping mechanism (11) includes a first guide rail (3), a first column (5) and a first crossbeam (7); the end of the first crossbeam (7) is movably connected to the first column (5) vertically, and the lower end of the first column (5) is movably connected to the first guide rail (3) horizontally. The second pipe gripping mechanism (12) includes a second guide rail (4), a second column (6) and a second crossbeam (8). The end of the second crossbeam (8) is vertically connected to the second column (6), and the lower end of the second column (6) is horizontally connected to the second guide rail (4).

6. The cantilevered track-walking pipe laying device according to claim 5, characterized in that, In the working state, the first crossbeam (7) is located on the side of the first column (5) facing the second pipe gripping mechanism (12); the second crossbeam (8) is located on the side of the second column (6) facing the first pipe gripping mechanism (11); In the folded state, the first crossbeam (7) is located on the side of the first column (5) facing the second pipe gripping mechanism (12); the second crossbeam (8) is located on the side of the second column (6) facing the first pipe gripping mechanism (11).

7. The cantilevered track-walking pipe laying device according to claim 6, characterized in that, In the working state, the free end of the first crossbeam (7) is connected to one end of the third crossbeam (9) by two pins spaced apart in the vertical direction; The free end of the second crossbeam (8) is connected to one end of the fourth crossbeam (13) by two pins spaced apart in the vertical direction.

8. The cantilevered track-walking pipe laying device according to claim 7, characterized in that, The second crossbeam (8) has a first ear seat (801) on the upper side of the middle part; the fourth crossbeam (13) has a fourth ear seat (1301) on its free end; in the folded state, after the pin on the lower side is removed, the free end of the fourth crossbeam (13) rotates to the upper side of the second crossbeam (8); the fourth ear seat (1301) is connected to the first ear seat (801) by a pin.

9. The cantilevered track-walking pipe laying device according to claim 8, characterized in that, A clamping unit (10) is fixedly installed at the free end of the third crossbeam (9) and the free end of the fourth crossbeam (13).

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