U-shaped bending test equipment and method for top drive cable

Abstract

The invention provides U-shaped bending test equipment and method for a top drive cable, and the equipment comprises a winding and unwinding system which is used for winding and unwinding a steel wire rope, the output end of the winding and unwinding system is connected with the steel wire rope, and the winding and unwinding system is arranged on a floor at any height of a building; the top of the test rack is provided with a first guide wheel, the steel wire rope bypasses the first guide wheel and is connected with a lifting plate, the lifting plate is connected with the A end of the cable through a first connecting piece to drive the A end to move up and down in the Z direction, and the B end of the cable is fixed to the test rack through a second connecting piece; when the end A moves up and down, the cable is U-shaped. According to the invention, the U-shaped bending test of a cable with a long moving distance and a large outer diameter can be completed.

Description

Technical Field

[0001] The invention belongs to the technical field of bending test of top drive traveling control cables of oil platforms, and in particular relates to a U-shaped bending test device and method for top drive cables. Background Art

[0002] The top drive traveling control cable of the oil platform is mainly used in the driving system at the top of the top drive drilling. When working, the top drive motor and control cable also need to reciprocate with the up and down movement of the drill bit. The top drive control system is complex, and the required cable assembly has a large outer diameter (more than 100mm). The cable core often breaks during the up and down movement of the drill bit, affecting the normal use of the equipment.

[0003] Existing cable bending test methods and equipment are not suitable for testing the bending life of cables with large outer diameters and long moving distances. Summary of the invention

[0004] The purpose of the present invention is to provide a U-shaped bending test device and method for top drive cables, which is suitable for U-shaped bending tests of cables with long moving distances and large outer diameters. The technical solution adopted is:

[0005] A U-shaped bending test device for a top drive cable, comprising:

[0006] A retracting and releasing system, used for retracting and releasing the steel wire rope 14, whose output end is connected to the steel wire rope 14, and which is placed on a floor of any height of the building 18;

[0007] The test frame 19 is located on one side of the building 18 and is used to receive the cable 17. A guide wheel is arranged on the top of the test frame 19. The steel wire rope 14 passes over the guide wheel and is connected to the lifting plate 16. The lifting plate 16 is connected to the A end of the cable 17 through the first connector to drive the A end to move up and down along the Z direction. The B end of the cable 17 is fixed to the test frame 19 through the second connector, and its upper end passes through the second connector.

[0008] During the up and down movement of end A, the cable 17 is in a U shape;

[0009] The cable 17 includes N wires. At the A end, any two of them are connected together by wires to form a total of N / 2 test paths. At the B end, for each test path, one wire in each test path is connected to the common end, and the other wire in each test path is connected to the wiring terminal of the test end of the electrical control test system.

[0010] Preferably, the first connecting member is a flange, one end of which is connected to the lifting plate 16 via a fastener, and the other end of which is interference fit with the cable 17 .

[0011] Preferably, a buffer column 20 is further included, which is disposed on the test frame 19 and located below the cable 17 .

[0012] Preferably, a No. 2 guide wheel and a wire rope proximity switch 15 are provided on the floor;

[0013] The steel wire rope 14 passes through the No. 2 guide wheel and the No. 1 guide wheel in sequence; the steel wire rope proximity switch 15 is located at one side of the No. 2 guide wheel.

[0014] Preferably, the retractable system comprises:

[0015] A driving unit, the output shaft of which extends along the Y direction;

[0016] Gear 1 3, gear 2 4 and gear 3 6 are meshed in sequence; the gear 1 3 is connected to the output shaft of the driving unit; along the Y direction, the transmission shaft on which the gear 2 4 is installed is arranged on the base 23 through a bearing;

[0017] The base 23 has a through groove on its top surface for accommodating the lower section of the drum 5, and a channel extending along the X direction is also provided on the base 23, the channel being connected to the through groove; the drum 5 is used to wind the steel wire rope 14, and the channel is for the steel wire rope 14 to pass through;

[0018] The reel 5 is disposed on the transmission shaft, and along the Y direction, it is located behind the housing 1 21 and inside the housing 2 22 ; the housing 1 21 and the housing 2 22 are both disposed on the base 23 .

[0019] Preferably, the retractable system further comprises:

[0020] The slide 13 has a switch unit for limiting the moving distance of the cable 17 installed thereon. The slide 13 extends along the Y direction and has a ball screw pair arranged thereon. The lead screw of the ball screw pair extends along the Y direction and is connected to the gear three 6. The lead screw is rotatably connected to the slide 13. The nut of the ball screw pair is provided with a sensing column 7, and the sensing column 7 is used to trigger the switch unit.

[0021] Preferably, the switch unit comprises:

[0022] The lower limit position proximity switch 8, the lower reversing proximity switch 9, the counting proximity switch 10, the upper reversing proximity switch 11, and the upper limit position proximity switch 12 are arranged in sequence along the Y direction, and the lower limit position proximity switch 8 is set close to the gear three 6.

[0023] Preferably, the steel wire rope 14 passes through a limit frame, and the limit frame is located in a through groove of the base 23 and connected to the floor through fasteners.

[0024] Preferably, the reducer is a turbine reducer.

[0025] A U-shaped bending test method for a top drive cable, based on the U-shaped bending test equipment for a top drive cable, comprises the following steps:

[0026] Step 1: Connect any two of the N wires at end A through a wire to form a total of N / 2 paths to be tested.

[0027] Step 2: At the B end, for each circuit to be tested, connect one wire in each circuit to be tested to the common end, and connect another wire in each circuit to be tested to the wiring terminal of the test end of the electrical control test system;

[0028] Step 3, start the retractable system, and the cable 17 moves up and down along the Z direction; during the movement, the line integrity test is performed on the N / 2 paths to be tested.

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] It is suitable for testing cables with larger outer diameter and longer moving distance. During the up and down movement of the cable, the line integrity test of the cable is performed to complete the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the front view of the U-bend test equipment for top drive cables;

[0032] Figure 2 for Figure 1 Side view of

[0033] Figure 3 for Figure 1 The front view of the central retractable system;

[0034] Figure 4 This is a front view of the retractable system without the drive unit and the mounting base 1;

[0035] Figure 5 This is a schematic diagram of the installation of the drive unit and gear one;

[0036] Figure 6 is a schematic diagram of the position of the mounting seat 1;

[0037] Figure 7 is the distribution diagram of the switch unit;

[0038] Figure 8 This is a physical picture of the test stand;

[0039] Figures 9-11 This is a physical picture of the retractable system;

[0040] Fig.12 It is a schematic diagram of the position of the slide and gear three;

[0041] Fig.13This is a schematic diagram of the relative positions of the wire rope proximity switch and the No. 2 guide wheel;

[0042] Fig.14 This is a physical diagram of the connection between the B end of the cable and the connector 2 and the test frame;

[0043] Fig.15 Test the wiring diagram for completeness.

[0044] Among them, 1-motor, 2-reducer, 3-gear 1, 4-gear 2, 5-reel, 6-gear 3, 7-sensing column;

[0045] 8-lower limit position proximity switch, 9-lower reversing proximity switch, 10-counting proximity switch, 11-upper reversing proximity switch, 12-upper limit position proximity switch;

[0046] 13-slide table, 14-wire rope, 15-wire rope proximity switch, 16-lifting plate, 17-cable, 18-building, 19-test stand, 20-buffer column;

[0047] 21-housing one, 22-housing two, 23-base. DETAILED DESCRIPTION

[0048] The U-shaped bending test device and method for the top drive cable of the present invention will be described in more detail below in conjunction with the schematic diagram, wherein the preferred embodiment of the present invention is shown, and it should be understood that the present invention described herein can be modified by a person skilled in the art, while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as being widely known to a person skilled in the art, and not as a limitation of the present invention.

[0049] A U-shaped bending test device for a top drive cable, wherein the outer diameter of the upper cable 17 exceeds 100 mm, the moving distance exceeds 5 m, and the moving speed can reach 2 m / s.

[0050] like Figures 1 to 14 , U-bending test equipment for top drive cables includes:

[0051] A retracting and releasing system, used for retracting and releasing the steel wire rope 14, whose output end is connected to the steel wire rope 14, and which is placed on a floor of any height of the building 18;

[0052] The test frame 19 is used to receive the cable 17. A guide wheel No. 1 is arranged on the top. The wire rope 14 passes around the guide wheel No. 1 and is connected to the lifting plate 16. The lifting plate 16 is connected to the A end of the cable 17 through the connecting piece 1 to drive the A end to move up and down along the Z direction. The B end of the cable 17 is fixed to the test frame 19 through the connecting piece 2.

[0053] Specifically, the outer coating of the B end of the cable 17 is interference fit with the flange, and the wires therein pass upward through the flange, such as Fig.14 As shown, the B end of the cable 17 is a section of wire that passes through the flange without an outer covering.

[0054] The buffer column 20 is disposed on the test frame 19 and is located below the cable 17 .

[0055] During the up and down movement of end A, the cable 17 is in a U shape;

[0056] Cable 17 includes N wires. At the A end, any two wires are connected together by wires to form a total of N / 2 test paths. At the B end, for each test path, one wire in each test path is connected to the common end, and the other wire in each test path is connected to the wiring terminal of the test end of the electrical control test system.

[0057] The first connecting member is a flange, one end of which is connected to the lifting plate 16 through a fastener, and the other end of which is interference fit with the cable 17 .

[0058] A No. 2 guide wheel and a wire rope proximity switch 15 are arranged on the floor; the wire rope proximity switch 15 is a photoelectric proximity switch.

[0059] The wire rope 14 passes through the No. 2 guide wheel and the No. 1 guide wheel in sequence; the wire rope proximity switch 15 is located on one side of the No. 2 guide wheel.

[0060] In this embodiment, the retractable system includes:

[0061] The output shaft of the driving unit extends along the Y direction. The reducer is a worm reducer, and the output shaft of the reducer is the output shaft of the driving unit.

[0062] Gear 1 3, gear 2 4 and gear 3 6 are meshed in sequence; gear 1 3 is connected to the output shaft of the driving unit; along the Y direction, the transmission shaft on which gear 2 4 is installed is rotatably arranged on the base 23 through the bearing. Specifically, the transmission shaft is connected to the bearing, the bearing is installed on the bearing seat, and the bearing seat is fixed to the base 23, as shown in FIG. Fig.11 shown.

[0063] The transmission shaft and gear 2 4 are connected via fasteners or keys.

[0064] The transmission shaft and the drum 5 are connected via a hub or fixedly connected.

[0065] Gear 1 3 and reducer 2 are connected by a key;

[0066] Gear three 6 is connected to the lead screw of the ball screw pair via a key, and a section of the lead screw connected to gear three 6 is a smooth rod.

[0067] The base 23 has a through groove on its top surface for accommodating the lower section of the drum 5, and a channel extending along the X direction is also provided on the base 23, the channel being connected to the through groove; the drum 5 is used to wind the steel wire rope 14, and the channel is for the steel wire rope 14 to pass through;

[0068] The reel 5 is arranged on the transmission shaft to rotate with the transmission shaft, and is located behind the housing 1 21 and inside the housing 2 22 along the Y direction. The housing 1 21 is a protective shell, which surrounds the gear 1 3, the gear 2 4 and the gear 3 6.

[0069] Figure 1 , Figure 3-4 In the figure, the housing 21 is not shown.

[0070] The slide 13 has a switch unit for limiting the moving distance of the cable 17 installed thereon. The slide 13 extends along the Y direction and has a ball screw pair arranged thereon. The lead screw of the ball screw pair extends along the Y direction and is connected to the gear three 6. The lead screw and the slide 13 are rotationally connected via a bearing. The nut of the ball screw pair is provided with a sensing column 7, which is used to trigger the switch unit.

[0071] Furthermore, the steel wire rope 14 passes through a limit frame, which is located in a through groove of the base 23 and connected to the floor through fasteners.

[0072] like Figure 7 As shown, Fig.12 The switch unit includes:

[0073] The lower limit position proximity switch 8, the lower reversing proximity switch 9, the counting proximity switch 10, the upper reversing proximity switch 11, and the upper limit position proximity switch 12 are arranged in sequence along the Y direction, and the lower limit position proximity switch 8 is set close to the gear three 6.

[0074] The lower limit position proximity switch 8, the lower reversing proximity switch 9, the counting proximity switch 10, the upper reversing proximity switch 11, and the upper limit position proximity switch 12 are all photoelectric proximity switches.

[0075] The electrical control test system includes an electrical air test system and a control cabinet, which is a PLC control cabinet. The control cabinet controls the equipment operation signal and cable testing.

[0076] The working principle of the retractable system:

[0077] When the motor 1 starts, it is transmitted to the reducer 2, and then to the gear 2 4 through the gear 1 3, and the drum 5 starts to run. When the drum 5 winds the wire rope 14, the cable 17 connected to the lifting plate 16 will go up with it. During the winding process of the drum 5, the gear 2 4 will transmit the gear 3 6, and the gear 3 6 will transmit the slide 13.

[0078] When the sensing column 7 on the slide 13 is sensed by the counting proximity switch 10, it will be counted as one time.

[0079] When the sensing column on the slide 13 is sensed by the upper reversing proximity switch 11, the motor 1 immediately reverses, and the cable 17 on the lifting plate 16 moves downward;

[0080] After descending to a certain extent, the induction column 7 on the slide 13 will be sensed by the lower reversing proximity switch 9, and the motor 1 will immediately reverse after the induction, and the cable 17 will move upward.

[0081] By analogy, the cable 17 repeatedly moves upward and downward;

[0082] When the steel wire rope 14 is broken as a whole, the steel wire rope proximity switch 15 will immediately shut down the motor 5, and the cable 17 will directly fall onto the buffer column 20, which will prevent the cable 17 from touching the bottom and damaging it.

[0083] The abnormality of the steel wire rope 14 is caused by the breakage of a single wire or several wires therein.

[0084] The breaking of the steel wire rope 14 means that all the wires therein are broken.

[0085] The working principle of the wire rope proximity switch 5: When a reflective surface (the object to be detected) approaches, a signal is output after receiving the reflected light, thereby "sensing" that an object is approaching.

[0086] When the upper reversing proximity switch 11 fails, the sensing column 7 will move to be sensed by the upper limit position proximity switch 12, and the motor 1 will be shut down;

[0087] When the lower reversing proximity switch 9 fails, the sensing column 7 will move to be sensed by the lower limit position proximity switch 8, and the motor 1 will be shut down.

[0088] The average speed of the cable 17 going up and down is 10 m / s, and up+down=1 time.

[0089] The cable 17 is composed of a plurality of wires, with a maximum of 150 wires, and each wire has a specific number.

[0090] Step 1: Connect any two of the N wires at end A through a wire to form a total of N / 2 paths to be tested.

[0091] Step 2: At the B end, for each circuit to be tested, connect one wire in each circuit to be tested to the common end, and connect the other wire in each circuit to be tested to the wiring terminal of the test end of the electrical control test system.

[0092] Among them, the control power supply, motor and electrical control test system are connected in sequence.

[0093] like Fig.15 As shown, wires connected to the electrical control test system are numbered even numbers.

[0094] The electrical control cabinet is the electrical control test system.

[0095] Step 3: Start the motor 5 to perform a cable integrity test on the N / 2 paths to be tested.

[0096] That is, when the motor 5 is started, any two wires at one end (end A) of the multiple wires are connected together, and the N / 2 paths to be tested at the other end (end B) form paths through the electrical control test system and the control power supply of the motor 5.

[0097] When any electrical line in the path to be tested is broken, no current signal is transmitted to the electrical test system, and the electrical test system sends a signal 0 to motor 5, and motor 5 stops running. The number of the wire will be displayed on the electrical display screen of the electrical test system.

[0098] Among them, the reasons for starting the motor 5 to lift the cable 17 are:

[0099] For any path to be tested, since the A ends are connected together, the section from the A end to the U-bend of the cable (the lowest point of the cable 17) is regarded as a whole, and the section from the B end to the cable bend is the section to be tested.

[0100] By lifting and lowering the cable 17, the length of the section to be tested is continuously changed, so as to finally complete the testing of all sections between the A end and the B end.

[0101] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A U-shaped bending test equipment for top drive cable, characterized in that: include: A retractable system, used for retracting and releasing a steel wire rope (14), wherein an output end of the system is connected to the steel wire rope (14) and is placed on a floor of any height of a building (18); A test frame (19) is located on one side of a building (18) and is used to receive a cable (17). A first guide wheel is arranged on the top of the test frame. The steel wire rope (14) passes over the first guide wheel and is connected to a lifting plate (16). The lifting plate (16) is connected to the A end of the cable (17) through a first connector to drive the A end to move up and down along the Z direction. The B end of the cable (17) is fixed to the test frame (19) through a second connector, and its upper end passes through the second connector. During the up and down movement of end A, the cable (17) is in a U shape.

2. The U-shaped bending test equipment for top drive cable according to claim 1, characterized in that: The first connecting member is a flange, one end of which is connected to the lifting plate (16) via a fastener, and the other end of which is interference fit with the cable (17).

3. The U-shaped bending test equipment for top drive cable according to claim 1, characterized in that: It further comprises a buffer column (20) which is arranged on the test frame (19) and is located below the cable (17).

4. The U-shaped bending test equipment for top drive cable according to claim 1, characterized in that: A No. 2 guide wheel and a wire rope proximity switch (15) are arranged on the floor; The steel wire rope (14) passes through the second guide wheel and the first guide wheel in sequence; the steel wire rope proximity switch (15) is located on one side of the second guide wheel.

5. The U-shaped bending test equipment for top drive cable according to claim 1, characterized in that: The retractable system comprises: A driving unit, the output shaft of which extends along the Y direction; Gear 1 (3), gear 2 (4) and gear 3 (6) are meshed in sequence; the gear 1 (3) is connected to the output shaft of the driving unit; along the Y direction, the transmission shaft on which the gear 2 (4) is mounted is arranged on the base (23) through a bearing; The base (23) has a through groove on its top surface for accommodating the lower section of the drum (5), and the base (23) also has a channel extending along the X direction, the channel being connected to the through groove; the drum (5) is used to wind the steel wire rope (14), and the channel is for the steel wire rope (14) to pass through; The reel (5) is arranged on the transmission shaft, and is located behind the first shell (21) and inside the second shell (22) along the Y direction; the first shell (21) and the second shell (22) are both arranged on the base (23).

6. The U-shaped bending test equipment for top drive cable according to claim 5, characterized in that: The retractable system also includes: A slide (13) is provided with a switch unit for limiting the moving distance of a cable (17), which extends in the Y direction and is provided with a ball screw pair, the lead screw of which extends in the Y direction and is connected to a gear three (6), and the lead screw is rotationally connected to the slide (13); a sensing column (7) is provided on the nut of the ball screw pair, and the sensing column (7) is used to trigger the switch unit.

7. The U-shaped bending test equipment for top drive cable according to claim 6, characterized in that: The switch unit comprises: A lower limit position proximity switch (8), a lower reversing proximity switch (9), a counting proximity switch (10), an upper reversing proximity switch (11), and an upper limit position proximity switch (12) are arranged in sequence along the Y direction, and the upper limit position proximity switch (8) is arranged close to the gear three (6).

8. The U-shaped bending test equipment for top drive cable according to claim 5, characterized in that: The steel wire rope (14) passes through a limit frame, and the limit frame is located in a through groove of a base (23) and is connected to the floor through a fastener.

9. The U-shaped bending test equipment for top drive cable according to claim 1, characterized in that: The reducer is a turbine reducer.

10. A U-shaped bending test method for a top drive cable, based on the U-shaped bending test equipment for a top drive cable according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Connect any two of the N wires at the A end through a wire to form a total of N / 2 paths to be tested; Step 2: At the B end, for each circuit to be tested, connect one wire in each circuit to be tested to the common end, and connect another wire in each circuit to be tested to the wiring terminal of the test end of the electrical control test system; Step 3: Start the retractable system, and the cable (17) moves up and down along the Z direction; during the movement, the line integrity test is performed on the N / 2 paths to be tested.

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