Safety anti-fall device for the transfer arm of the lifting power catwalk

Abstract

The present application discloses a safety anti-fall device for the transfer arm of a lifting power catwalk, which relates to the field of oil drilling and production. The key points of the technical solution are that it includes a block assembly arranged on a catwalk bracket, a trigger mechanism for driving the block assembly to move, and a connecting block connecting the trigger mechanism and the block assembly; the block assembly includes a double-ear plate fixing seat fixed on the back of the catwalk bracket and a block hinged to the double-ear plate fixing seat, and the block is fixedly connected to the connecting block; the trigger mechanism includes a double-ear seat crossbeam fixed on the back of the catwalk bracket, a trigger rod hinged to the double-ear seat crossbeam, a trigger wire rope fixedly connected to the trigger rod at one end and fixedly connected to the connecting block at the other end, a pulley block fixed on the catwalk bracket for the trigger wire rope to turn, and a trigger frame fixed to the top of the trigger rod. The present application has the effect of increasing the safety of the moving wall during lifting and lowering.

Description

Technical Field

[0001] The present application relates to the field of oil drilling and production, and in particular to a safety anti-falling device for a transfer arm of a pull-up power catwalk. Background Art

[0002] At present, the wire rope-lifting power catwalk used in conjunction with land drilling rigs realizes the automatic transportation of drill strings from the ground to the drilling platform. It is through the rotation of the winch located on the back of the ramp, and the wire rope wrapped around the winch drum drives the lifting and lowering of the transfer arm. Long-term use of the power catwalk will cause wear and fatigue aging of the wire rope. In fact, there will be special inspectors on site to conduct inspections and complete the replacement of the wire rope when necessary. However, sometimes the inspectors are negligent or for other reasons, which will cause the wire rope that has reached the replacement standard to continue to be used. There may be other unexpected reasons, which will cause extreme events such as wire rope breakage. The wire rope breakage will cause the transfer arm carrying the drill string to fall instantly. If the transfer arm is located at a higher position on the catwalk ramp from the ground when the wire rope breaks, it will cause serious damage to the equipment and even cause casualties, and safety cannot be guaranteed. Summary of the invention

[0003] In order to increase the safety during the lifting and lowering process of the moving wall, the present application provides a safety anti-falling device for the transfer arm of a pull-up power catwalk.

[0004] A subject name provided in the present application adopts the following technical solution: a safety anti-fall device for the transfer arm of a pull-up power catwalk, comprising a block assembly arranged on the catwalk bracket, a trigger mechanism that drives the block assembly to move, and a connecting block connecting the trigger mechanism and the block assembly; the block assembly comprises a double-ear plate fixing seat fixed to the back of the catwalk bracket and a block hinged to the double-ear plate fixing seat, and the block is fixedly connected to the connecting block; the trigger mechanism comprises a double-ear seat crossbeam fixed to the back of the catwalk bracket, a trigger rod hinged to the double-ear seat crossbeam, a trigger wire rope with one end fixedly connected to the trigger rod and the other end fixedly connected to the connecting block, a pulley group fixed on the catwalk bracket for turning the trigger wire rope, and a trigger frame fixed to the top of the trigger rod.

[0005] By adopting the above technical solution, the lifting wire rope passes through the trigger frame to limit the trigger frame. When the lifting wire rope breaks, the trigger frame breaks away from the limit of the lifting wire rope, and the trigger frame falls under the drive of its own gravity, pulling the trigger wire rope, thereby driving the stopper to move, and driving the stopper to pop out from the V-shaped groove, blocking the sliding transfer arm in the V-shaped groove to prevent the transfer arm from continuing to slide, thereby increasing the safety of the moving wall during lifting and lowering.

[0006] Optionally, the block assemblies are in multiple groups, and connecting steel wire ropes are provided between the multiple groups of block assemblies, and the connecting steel wire ropes are fixedly connected to two adjacent block assemblies.

[0007] By adopting the above technical solution, multiple groups of blocks can be set at multiple positions of the V-shaped groove and linked by connecting steel wire ropes; when an accident occurs, the transfer arm slides down and abuts against the block closest to it below, which can shorten the distance that the moving wall slides down, and when one of the blocks fails (such as breaking), the remaining blocks can act as insurance, increasing the stability of the use of the limit assembly.

[0008] Optionally: a spiral buckle is fixed on the stopper, and the two ends of the connecting wire rope are fixedly connected to the spiral buckle.

[0009] By adopting the above technical solution, the length of the wire rope can be changed by rotating the spiral buckle to ensure that the stopper is in the V-shaped groove under normal working conditions and does not interfere with the movement of the transfer arm.

[0010] Optionally, the number of the trigger mechanisms is multiple groups, which is the same as the number of the lifting wire ropes.

[0011] By adopting the above technical solution, each lifting wire rope corresponds to a group of trigger mechanisms. When one of the lifting wire ropes breaks, a group of trigger mechanisms can be triggered to drive the block to pop out, further increasing the safety of the transfer arm lifting and lowering.

[0012] Optionally, the trigger frame is rotatably connected to a front roller and a rear roller, and there is a gap between the front roller and the rear roller.

[0013] By adopting the above technical solution, the roller replaces the trigger frame to abut against the lifting wire rope, which can reduce the wear on the lifting wire rope.

[0014] Optionally, an unlocking wire rope is fixed to one end of the trigger frame away from the trigger rod.

[0015] By adopting the above technical solution, after adjusting the transfer arm with a crane, the trigger mechanism is lifted to a normal working state with an unlocking wire rope to achieve the purpose of brake unlocking. The unlocking is quick and convenient, which is convenient for the subsequent replacement of the lifting wire rope.

[0016] Optionally: A counterweight is fixed to the end of the trigger frame away from the trigger rod.

[0017] By adopting the above technical solution, the counterweight block can increase the gravity of the trigger frame, and can increase the pulling force on the trigger wire rope after the lifting wire rope breaks, so that the stopper can pop out into the V-shaped groove more stably. By increasing the pulling force of the trigger wire rope, the stability of the stopper popping out is increased.

[0018] Optionally: it also includes a safety device arranged on the transfer arm and a ratchet bar arranged on the side wall of the V-shaped groove; the safety device includes a support block connected to the transfer arm, a rotating shaft rotatably connected to one end of the support block, a connecting plate rotatably connected to the rotating shaft, an abutment wheel fixed to the end of the connecting plate away from the support block, a clamping block fixed to the end of the abutment wheel away from the connecting plate, and an elastic member that drives the connecting plate to rotate toward the direction close to the V-shaped groove.

[0019] By adopting the above technical solution, when the lifting wire rope breaks, the transfer arm will have a tendency to slide down along the V-shaped groove. Since the trigger mechanism drives the block to pop out, the block will block the transfer arm. However, when the wire rope breaks, if the transfer arm is far away from the block closest to it, a large kinetic energy will be generated during the sliding process of the transfer arm. At this time, the transfer arm and the block will collide violently, which may easily cause damage to both, and may cause the block to lose its blocking function; therefore, the added safety device can immediately drive the block to cooperate with the ratchet bar when the lifting wire rope breaks, block the sliding of the transfer arm, reduce the kinetic energy of the transfer arm's sliding, and reduce the occurrence of violent collisions between the transfer arm and the block, which plays a further insurance role.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The lifting wire rope passes through the trigger frame to limit the trigger frame. When the lifting wire rope breaks, the trigger frame is separated from the limit of the lifting wire rope, and the trigger frame falls under its own gravity, pulling the trigger wire rope, thereby driving the stopper to move, driving the stopper to pop out from the V-shaped groove, and blocking the sliding transfer arm in the V-shaped groove to prevent the transfer arm from continuing to slide, thereby increasing the safety of the moving wall during lifting and lowering;

[0022] 2. The length of the wire rope can be changed by rotating the turnbuckle to ensure that the stopper is in the V-shaped groove under normal working conditions and does not interfere with the movement of the transfer arm;

[0023] 3. When the lifting wire rope breaks, the safety device can immediately drive the block to cooperate with the ratchet bar to block the sliding of the transfer arm, reduce the kinetic energy of the transfer arm's downward movement, and reduce the occurrence of violent collisions between the transfer arm and the block, thus playing a further insurance role. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural diagram showing the installation position of the embodiment;

[0025] Figure 2 This is a schematic diagram showing the structure of the back of the catwalk support;

[0026] Figure 3 for Figure 1 A magnified view of part A;

[0027] Figure 4 It is a schematic diagram of the overall structure of the embodiment;

[0028] Figure 5 for Figure 4 A magnified view of part B;

[0029] Figure 6 It is a structural schematic diagram of the working state of the embodiment;

[0030] Figure 7 It is a structural schematic diagram of the second embodiment;

[0031] Figure 8 To illustrate the structural diagram of the safety device;

[0032] Fig. 9 for Figure 8 Enlarged view of part C;

[0033] Fig.10 A schematic diagram showing the structure of the card block.

[0034] Description of reference numerals: 1, catwalk bracket; 11, V-shaped groove; 12, transfer arm; 121, transfer plate; 13, winch drum; 14, lifting wire rope; 15, fixed pulley; 2, block assembly; 21, fixed seat; 22, block; 23, turnbuckle; 3, wire rope; 4, trigger mechanism; 41, double-ear seat crossbeam; 42, trigger frame; 421, front roller; 422, rear roller; 423, counterweight; 43, trigger wire rope; 44, pulley block; 45, trigger Rod; 5. Connecting block; 6. Unlocking wire rope; 7. Safety device; 71. Support block; 711. First abutment block; 712. Fixed plate; 713. Fixed block; 72. Rotating shaft; 721. Dial block; 73. Connecting plate; 731. Second abutment block; 732. Slot; 74. Torsion spring; 75. Connecting rod; 76. Gravity block; 77. Abutment wheel; 78. Block; 79. Sliding block; 791. Matching block; 792. Brake block; 793. Spring; 8. Ratchet bar. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] Example: See Figure 1 and Figure 3 A lifting power catwalk includes a catwalk bracket 1, a V-shaped groove 11 fixed on the catwalk bracket 1, a transfer arm 12 that rises and falls in the V-shaped groove 11, a winch drum 13 fixed at the bottom end of the back of the catwalk bracket 1, a lifting wire rope 14 with one end fixedly connected to the winch drum 13 and the other end fixedly connected to the transfer arm 12, and a fixed pulley 15 rotatably connected to the catwalk bracket 1.

[0037] Combination Figure 2 There are two lifting wire ropes 14, which are arranged in parallel. The winch drum 13 is arranged at the bottom end of the catwalk bracket 1, and the fixed pulley 15 is arranged at the top end of the catwalk bracket 1. The lifting wire rope 14 passes through the fixed pulley 15 from the winch drum 13 and is fixedly connected to the transfer arm 12 at the other end. The transfer arm 12 is driven to rise and fall in the V-shaped groove 11 by the winding and unwinding of the winch drum 13.

[0038] See also Figure 4 The transfer arm safety anti-falling device of the pull-up power catwalk includes multiple groups of block assemblies 2 (three groups in the figure, but not limited to three groups) arranged on the catwalk bracket 1, connecting wire ropes 3 connecting the multiple groups of block assemblies 2, triggering mechanisms 4 that drive the block assemblies 2 to move, connecting blocks 5 connecting the triggering mechanisms 4 and the block assemblies 2, and unlocking wire ropes 6 connected to the triggering mechanisms 4.

[0039] The block assembly 2 comprises a double-ear plate fixing seat 21 fixed to the back of the catwalk bracket 1, a block 22 hinged to the double-ear plate fixing seat 21, and a spiral buckle 23 fixedly connected to the side of the block 22 away from the catwalk bracket 1. The connecting block 5 is fixedly connected to the block 22 of the blocking assembly 2 close to the connecting block 5.

[0040] The V-shaped groove 11 is provided with a through hole for the stopper 22 to pass through. When the trigger mechanism 4 drives the stopper 22 to move, the stopper 22 can pass through the through hole provided in the V-shaped groove 11. The two ends of the connecting wire rope 3 are respectively fixedly connected with the turn buckles 23 of two adjacent groups of stopper assemblies 22. The turn buckle is used to adjust the length of the connecting wire rope 3 to ensure that the stopper 22 is in the V-shaped groove 11 under normal working conditions and does not interfere with the movement of the transfer arm 12.

[0041] See also Figure 4 and Figure 5 The trigger mechanism 4 includes a double-ear seat crossbeam 41 fixed to the back of the catwalk bracket 1, a trigger rod 45 hinged to the double-ear seat crossbeam 41, a trigger wire rope 43 fixedly connected to the trigger rod 45 at one end and fixedly connected to the connecting block 5 at the other end, a pulley block 44 fixed to the catwalk bracket 1, and a trigger frame 42 fixed to the top of the trigger rod 45. The number of the trigger rod 45 and the trigger frame 42 is the same as the number of the lifting wire rope 14, that is, two sets.

[0042] The end of the trigger frame 42 close to the trigger rod 45 is rotatably connected to the rear roller 422, and the end of the trigger frame 42 away from the trigger rod 45 is rotatably connected to the front roller 421; the front roller 421 and the rear roller 422 are both made of nylon, and a gap is left between the front roller 421 and the rear roller 422 for the passage of the lifting wire rope 14; the lifting wire rope 14 is brought into contact with the front roller 421 or the rear roller 422, and the position of the trigger frame 42 is limited by the lifting wire rope 14, so that the position of the trigger frame 42 remains stable. A counterweight 423 is also fixed to the trigger frame 42, and the counterweight 423 is located on the side of the rear roller 422 away from the front roller 421. The unlocking wire rope 6 is fixed to the end of the trigger frame 42 away from the trigger rod 45.

[0043] Combination Figure 6 The implementation principle of the safety anti-falling device of the transfer arm 12 of the lifting power catwalk of the present application embodiment is as follows: if an emergency occurs and any one of the lifting wire ropes 14 breaks, after the trigger frame 42 breaks away from the limit of the lifting wire rope 14, the trigger frame 42 falls under the drive of the counterweight block 423 and its own gravity, pulling the trigger wire rope 43, thereby driving the block 22 to move, and driving the block 22 to pop out of the V-shaped groove 11. Since the multiple groups of block assemblies 2 are connected by connecting wire ropes 3, after the block 22 of the first group of block assemblies 2 pops out, the remaining blocks 22 can react quickly and pop out of the V-shaped groove 11; at the position of the three blocks 22, they can randomly and quickly get stuck on the nylon block fixing structure of the falling transfer arm 12, playing a role of timely braking.

[0044] In order to replace the lifting wire rope 14 later, the drill pipe transfer arm 12 needs to be returned to the catwalk base. At this time, after adjusting the transfer arm 12 with a crane, the trigger mechanism 4 is raised to a normal working state with the unlocking wire rope 6 to achieve the purpose of braking unlocking. The unlocking is quick and convenient, which is convenient for the subsequent replacement of the lifting wire rope 14.

[0045] Example 2: See Figure 7 and Figure 8 The difference between this embodiment and the first embodiment is that a safety device 7 is provided on the V-shaped groove 11, and a ratchet bar 8 cooperating with the safety device 7 is provided on the transfer arm 12. A transfer plate 121 is hingedly connected to one end of the transfer arm 12 close to the V-shaped groove 11, and a transfer wheel abutting against the V-shaped groove 11 is rotatably connected to the transfer plate 121. The safety device 7 is installed on the transfer plate 121. The ratchet bar 8 is fixed to the side wall of the V-shaped groove 11 by bolts. The number of the safety device 7 and the ratchet bar 8 is two groups, corresponding to the two lifting wire ropes 14 respectively.

[0046] See also Figure 8 and Fig. 9The safety device 7 includes a support block 71 connected to the transfer plate 121, a fixing plate 712 vertically fixed to the side of the support block 71 away from the V-shaped groove 11, a fixing block 713 fixed to the fixing plate 712, a rotating shaft 72 rotatably connected to the fixing block 713, a connecting plate 73 rotatably connected to the rotating shaft 72, a torsion spring 74 sleeved on the rotating shaft 72, a connecting rod 75 arranged at one end of the connecting plate 73 away from the fixing block 713, a gravity block 76 fixed to one end of the connecting rod 75 away from the connecting plate 73, an abutting wheel 77 rotatably connected to one side of the connecting plate 73, a clamping block 78 fixed to the side of the connecting plate 73 close to the ratchet bar 8, and a slider 79 slidably connected to the fixing plate 712. The installation of the safety device 7 is achieved by connecting and fixing the support block 71 and the transfer plate 121 with bolts and nuts passing through the two.

[0047] The fixing block 713 is fixed with a first abutting block 711 , and the connecting plate 73 is fixed with a second abutting block 731 ; both ends of the torsion spring 74 abut against the first abutting block 711 and the second abutting block 731 respectively, and drive the connecting plate 73 to rotate towards the direction close to the V-shaped groove 11 .

[0048] The abutment wheel 77 is a groove wheel, and the concave part of the abutment wheel 77 abuts against the lifting wire rope 14. A slot 732 is fixed to one end of the connecting plate 73 away from the fixing block 713, and the slot 732 is for inserting the connecting rod 75. The side wall of the slot 732 is threadedly connected with a bolt that can abut against the connecting rod 75. When the bolt is tightened, the bolt can abut against the connecting rod 75 tightly, increase the resistance of the connecting rod 75 to slide out, and fix the connecting rod 75 inserted into the slot 732.

[0049] A shift block 721 is fixed to one end of the rotating shaft 72 close to the slider 79. A matching block 791 capable of abutting against the shift block 721 is fixed to one end of the slider 79 close to the rotating shaft 72. A brake block 792 is fixed to one end of the slider 79 away from the rotating shaft 72, and the brake block 792 can abut against the transfer wheel on the transfer plate 121 to brake the transfer wheel. A spring 793 is sleeved on the slider 79, and the two ends of the spring 793 are respectively fixedly connected to the fixed plate 712 and the brake block 792, and drive the brake block 792 to move in the direction close to the fixed plate 712.

[0050] The implementation principle of the embodiment of the present application is as follows: when the equipment is working normally, the two ends of the lifting wire rope 14 are in a tensioned state under the pulling force of the transfer arm 12 and the winch drum 13, the abutment wheel 77 abuts against the lifting wire rope 14, and at this time the torsion spring 74 is in a compressed state, which tends to drive the connecting plate 73 to rotate in the direction close to the V-shaped groove 11. At this time, the lifting wire rope 14 plays a limiting role, and the connecting plate 73 cannot rotate in the direction close to the V-shaped groove 11. In this state, the clamping block 78 is located above the ratchet bar 8, and the two are in a separated state.

[0051] When the lifting wire rope 14 breaks, both ends of the broken lifting wire rope 14 cannot meet the tension at the same time and are in a relaxed state. At this time, the lifting wire rope 14 can no longer play a limiting role, and the connecting plate 73 starts to rotate in the direction close to the V-shaped groove 11 until the block 78 abuts against the ratchet bar 8, and the brake block 792 abuts against the transfer wheel on the transfer plate 121. The block 78 abuts against the ratchet on the ratchet bar 8, blocking the tendency of the block 78 to slide down along the V-shaped groove 11, thereby blocking the tendency of the support block 71 and the transfer plate 121 to slide down, and then blocking the tendency of the transfer arm 12 to slide down along the V-shaped groove 11. When the lifting wire rope 14 breaks, it blocks the downward movement of the transfer arm 12, playing a role of insurance.

[0052] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A safety anti-falling device for the transfer arm of a pull-up power catwalk, characterized in that: The invention comprises a block assembly (2) arranged on a catwalk bracket (1), a trigger mechanism (4) for driving the block assembly (2) to move, and a connecting block (5) connecting the trigger mechanism (4) and the block assembly (2); the block assembly (2) comprises a double-ear plate fixing seat (21) fixed to the back of the catwalk bracket (1) and a block (22) hinged to the double-ear plate fixing seat (21), and the block (22) is fixedly connected to the connecting block (5); the trigger mechanism (4) comprises a double-ear seat crossbeam (41) fixed to the back of the catwalk bracket (1), a trigger rod (45) hinged to the double-ear seat crossbeam (41), a trigger wire rope (43) with one end fixedly connected to the trigger rod (45) and the other end fixedly connected to the connecting block (5), a pulley block (44) fixed to the catwalk bracket (1) for turning the trigger wire rope (43), and a trigger frame (42) fixed to the top of the trigger rod (45); The block assemblies (2) are multiple groups, and connecting steel wire ropes (3) are provided between the multiple groups of block assemblies (2), and the connecting steel wire ropes (3) are fixedly connected to two adjacent block assemblies (22); A spiral buckle (23) is fixed on the stopper (22), and two ends of the connecting wire rope (3) are fixedly connected to the spiral buckle (23); The stopper assembly (2) comprises a double-ear plate fixing seat (21) fixed to the back of the catwalk bracket (1), a stopper (22) hinged to the double-ear plate fixing seat (21), and a spiral buckle (23) fixedly connected to the stopper (22) on a side away from the catwalk bracket (1), and the connecting block (5) is fixedly connected to the stopper (22) of the blocking assembly close to the connecting block (5); The trigger frame (42) is rotatably connected to a front roller (421) and a rear roller (422), and a gap exists between the front roller (421) and the rear roller (422); An unlocking steel wire rope (6) is fixed to one end of the trigger frame (42) away from the trigger rod (45); A counterweight (423) is fixed to one end of the trigger frame (42) away from the trigger rod (45); It also includes a safety device (7) arranged on the transfer arm (12) and a ratchet bar (8) arranged on the side wall of the V-shaped groove (11); the safety device (7) includes a support block (71) connected to the transfer arm (12), a fixing plate (712) fixed vertically to the side of the support plate away from the V-shaped groove (11), a fixing block (713) fixed to the fixing plate (712), a rotating shaft (72) rotatably connected to one end of the support block (71), a connecting plate (73) rotatably connected to the rotating shaft (72), an abutment wheel (77) rotating on the end of the connecting plate (73) away from the support block (71), a clamping block (78) fixed to the end of the abutment wheel (77) away from the connecting plate (73), and an elastic member driving the connecting plate (73) to rotate in a direction close to the V-shaped groove (11).

2. The transfer arm safety anti-falling device of the pull-up power catwalk according to claim 1 is characterized in that: The number of the trigger mechanisms (4) is multiple, which is the same as the number of the lifting steel wire ropes (14).

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