Electromagnetic brake structure for petroleum drilling

Abstract

The utility model discloses an electromagnetic brake structure for petroleum drilling. The electromagnetic brake structure comprises a power supply conversion module and a brake assembly, the power supply conversion module comprises a three-phase rectifier, the output end of the three-phase rectifier is fixedly connected with a direct current chopper, the output end of the direct current chopper is fixedly connected with a magneto-sensitive potentiometer, and the outer side of the magneto-sensitive potentiometer is fixedly connected with a control box. When a heavy object is put down from the winch, the rotor cuts magnetic lines of force of a magnetic field generated by locking of the stator, so that induced potential, eddy current and braking torque are generated, braking of the drilling machine is achieved, and the drilling machine can be braked in the process of pulling control voltage for initial speed reduction in the thorough braking process. A trigger rod is used for driving a friction assembly moving plate close to the trigger rod to move upwards till a friction block is pushed to make contact and rub with a center rotating shaft for secondary braking, and then friction braking in the third step can be involved in the continuous pressurization process during continuous pulling.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling, and in particular relates to an electromagnetic brake structure for oil drilling. Background Art

[0002] The brake system is a very important component of the oil rig. Although the electromagnetic brake is used as an auxiliary brake on the oil rig, its performance is also related to the work efficiency and production safety of drilling and operation. If the brake system fails, it will cause drilling to stop at the least, causing economic losses to the company, and even cause production accidents at the worst. Traditional mechanical brakes have a high and rapid local temperature rise, which affects the physical properties of the shaft and affects the surrounding sensors, thus affecting their service life. In addition, some magnetic brakes are limited by actual power and cannot only have electric magnetic brakes, but also require some emergency braking mechanisms. Utility Model Content

[0003] The utility model aims to provide an electromagnetic brake structure for oil drilling to solve the problem.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic brake structure for oil drilling, comprising a power conversion module and a brake assembly; the power conversion module comprises a three-phase rectifier, the output end of the three-phase rectifier is fixedly connected to a DC chopper, the output end of the DC chopper is fixedly connected to a magnetically sensitive potentiometer, the outer side of the magnetically sensitive potentiometer is fixedly connected to a control box, the upper side of the magnetically sensitive potentiometer is rotatably connected to a joystick, the upper side wall of the control box is provided with a through hole, the two side walls of the through hole are provided with a slide groove, the inner cavity of the slide groove is slidably connected to a slider, the slider is fixedly connected to the joystick, the DC chopper is electrically connected to the three-phase rectifier and the magnetically sensitive potentiometer, and a deceleration assembly for further deceleration is also provided on one side of the flange;

[0005] The deceleration assembly includes a brake box fixedly connected to a flange and having coolant arranged inside, a central rotating shaft passing through the brake box and movably connected to the flange through a sealed bearing, friction assemblies are arranged on both sides of the central rotating shaft inside the brake box, and the two friction assemblies are at different straight-line distances from the central rotating shaft, the friction assembly is slidingly connected to the inner wall of the brake box, a trigger rod is also hinged on the joystick, one end of the trigger rod is hinged to a friction assembly close to the central rotating shaft in a straight line and is pulled by the joystick to drive the friction assembly close to the central rotating shaft to decelerate, a synchronization mechanism is arranged between the two friction assemblies, the friction assembly close to the central rotating shaft continues to pull and move to increase the pressure of the friction assembly while contacting the central rotating shaft for friction braking, and at the same time drives the long-distance friction assembly to continuously approach the central rotating shaft through the synchronization mechanism and finally contact with it to generate further friction braking.

[0006] Preferably, the friction assembly comprises a friction block in contact with the central rotating shaft for friction, a movable plate slidably connected to the inner wall of the brake box is arranged on the outer side of the friction block, a telescopic rod is arranged between the movable plate and the friction block, and a spring is sleeved on the outer side of the telescopic rod.

[0007] Preferably, the synchronization mechanism includes a transmission rod fixedly connected to a movable plate in a short-distance friction assembly, one end of the transmission rod is movably connected to a pry plate assembly, a rotating rod is movably connected inside the pry plate assembly and is movably connected to an inner wall of a brake box via the rotating rod, and one end of the pry plate assembly is pressed onto a movable plate of a long-distance friction assembly.

[0008] Preferably, the pry plate assembly includes a pry plate body movably connected to the rotating rod, a second slide groove is provided inside the pry plate body, and a rotating shaft on the transmission rod movably connected to the pry plate body is slidably arranged inside the second slide groove.

[0009] Preferably, the brake assembly includes a coil, which is fixedly connected to the output end of the magnetically sensitive potentiometer, the outer side of the coil is fixedly connected to a stator, a side wall of the stator is fixedly connected to a flange, the surface of the flange is evenly provided with fixing screw holes, the inner side wall of the stator is rotatably connected to a rotor, a spring sheet is fixedly connected between the rotor and the stator, a bolt hole is provided on the outer side wall of the rotor, and the magnetically sensitive potentiometer is electrically connected to the coil.

[0010] Preferably, a mounting plate is fixedly connected to the lower side wall of the control box, and a rubber sheath is fixedly connected to one end of the joystick away from the magnetically sensitive potentiometer.

[0011] Preferably, a protective cover is fixedly connected to the inner cavity of the control box, the protective cover is slidably connected to the magnetically sensitive potentiometer, and a key slot is provided on the inner side wall of the rotor.

[0012] The technical effects and advantages of the utility model are as follows: when the coil is connected to a DC power supply, a constant magnetic field is generated. When the winch lowers the weight, the rotor cuts the magnetic lines of force of the stator lock to generate a magnetic field, thereby generating an induced potential, eddy current and braking torque to achieve braking of the drilling rig. In the process of thorough braking, the trigger rod can be used to drive the moving plate of the friction component in a short distance to move upward during the initial deceleration of the pulling control voltage until the friction block is pushed to contact and rub with the central shaft for secondary braking. Then, in the process of continuous pulling, the third step of friction braking can be intervened in the process of continuous pressurization. The transmission rod in the synchronization component can be used to drive the pry plate component to pry the moving plate on the long-distance friction component downward to press the friction block to further rub the central shaft. This technology can perform emergency braking even in the event of an emergency power outage, and performs two brakes during the braking process, avoiding the high temperature generated by a large-scale friction braking affecting the physical properties of the central shaft and the damage to the surrounding electromagnetic components caused by local heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a side sectional view of the brake assembly structure of the utility model;

[0015] Figure 3 It is a side view of the synchronization component of the utility model;

[0016] Figure 4 For the utility model Figure 3 A partial enlarged view of part A in the middle.

[0017] In the figure:

[0018] 1. Power conversion module; 11. Three-phase rectifier; 12. DC chopper; 13. Magnetic potentiometer; 14. Control box; 15. Mounting plate; 16. Protective cover; 17. Joystick; 18. Through hole; 19. Slide; 110. Slider; 111. Rubber sheath;

[0019] Braking assembly; 21, stator; 22, coil; 23, spring sheet; 24, bolt hole; 25, rotor; 26, keyway; 27, flange; 28, fixing screw hole;

[0020] Friction assembly; 31, rotating rod; 32, transmission rod; 33, friction block; 34, brake box; 35, moving plate; 36, spring; 37, pry plate assembly; 371, pry plate body; 372, slide groove;

[0021] 4. Trigger lever. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides an electromagnetic brake structure for oil drilling as shown in the figure, comprising a power conversion module 1 and a brake assembly 2; the power conversion module 1 comprises a three-phase rectifier 11, the output end of the three-phase rectifier 11 is fixedly connected with a DC chopper 12, the output end of the DC chopper 12 is fixedly connected with a magnetic potentiometer 13, the outer side of the magnetic potentiometer 13 is fixedly connected with a control box 14, the upper side of the magnetic potentiometer 13 is rotatably connected with a joystick 17, the upper side wall of the control box 14 is provided with a through hole 18, the two side walls of the through hole 18 are provided with a slide 19, the inner cavity of the slide 19 is slidably connected with a slider 110, the slider 110 is fixedly connected to the joystick 17, the DC chopper 12 is electrically connected to the three-phase rectifier 11 and the magnetic potentiometer 13, and a deceleration assembly for further deceleration is also provided on one side of the flange 27;

[0024] The deceleration assembly includes a brake box 34 which is fixedly connected to the flange 27 and has coolant inside. The central shaft passes through the brake box 34 and is movably connected to the flange 27 through a sealed bearing. Friction assemblies are arranged on both sides of the central shaft inside the brake box 34 and the two friction assemblies are at different straight-line distances from the central shaft. The friction assemblies are slidably connected to the inner wall of the brake box 34. A trigger rod 4 is also hinged on the joystick 17. One end of the trigger rod 4 is hinged to a friction assembly which is close to the central shaft in a straight line and is pulled by the joystick 17 to drive the friction assembly which is close to the central shaft to decelerate. A synchronization mechanism is arranged between the two friction assemblies. When the friction assembly which is close to the central shaft contacts the friction brake, it continues to pull and move to increase the pressure of the friction assembly. At the same time, it drives the friction assembly which is far away to approach the central shaft through the synchronization mechanism and finally contacts with it to produce further friction braking.

[0025] Specifically, the friction assembly includes a friction block 33 that contacts and rubs with the central shaft, a movable plate 35 that is slidably connected to the inner wall of the brake box 34 is arranged on the outer side of the friction block 33, a telescopic rod is arranged between the movable plate 35 and the friction block 33, and a spring 36 is sleeved on the outer side of the telescopic rod.

[0026] Specifically, the synchronization mechanism includes a transmission rod 32 fixedly connected to a moving plate 35 in a short-distance friction assembly, one end of the transmission rod 32 is movably connected to a pry plate assembly 37, the pry plate assembly 37 is movably connected to a rotating rod 31 inside and is movably connected to an inner wall of a brake box 34 through the rotating rod 31, and one end of the pry plate assembly 37 is pressed onto the moving plate 35 of the long-distance friction assembly.

[0027] Specifically, the pry plate assembly 37 includes a pry plate body 371 movably connected to the rotating rod 31 , a second slide groove 372 is opened inside the pry plate body 371 , and a rotating shaft on the transmission rod 32 movably connected to the pry plate body 371 is slidably arranged inside the second slide groove 372 .

[0028] Specifically, the brake assembly 2 includes a coil 22, which is fixedly connected to the output end of the magnetic potentiometer 13, and the outer side of the coil 22 is fixedly connected to the stator 21, and a flange 27 is fixedly connected to one side wall of the stator 21, and fixing screw holes 28 are evenly provided on the surface of the flange 27. The inner side wall of the stator 21 is rotatably connected to the rotor 25, and a spring sheet 23 is fixedly connected between the rotor 25 and the stator 21. The outer side wall of the rotor 25 is provided with a bolt hole 24, and the magnetic potentiometer 13 is electrically connected to the coil 22.

[0029] Specifically, the lower side wall of the control box 14 is fixedly connected with the mounting plate 15 , and the end of the joystick 17 away from the magnetic potentiometer 13 is fixedly connected with the rubber sheath 111 .

[0030] Specifically, a protective cover 16 is fixedly connected to the inner cavity of the control box 14 , the protective cover 16 is slidably connected to the magnetic sensitive potentiometer 13 , and a key slot 26 is formed on the inner side wall of the rotor 25 .

[0031] Working principle: by setting a three-phase rectifier 11 and a DC chopper 12, the three-phase rectifier 11 is used to convert the AC power supply to a DC power supply with a fixed voltage, and the DC chopper 12 is used to convert the DC power supply with a fixed voltage converted by the three-phase rectifier 11 into a DC power supply with an adjustable voltage. By setting a magnetically sensitive potentiometer 13, a joystick 17 and a slider 110, when the joystick 17 is turned, the joystick 17 pulls the control end of the magnetically sensitive potentiometer 13 to move up and down, thereby providing a pulsed DC power supply with an adjustable voltage. By setting a stator 21, a coil 22 and a rotor 25, a constant magnetic field is generated when the coil 22 is connected to the DC power supply. When the winch lowers the weight, the rotor 25 cuts the magnetic lines of force of the magnetic field generated by the stator 21, thereby generating an induced potential, eddy current and braking torque to achieve braking of the drilling rig. In the process of thorough braking, the trigger rod 4 can be used to drive the friction component moving plate 35 at a close distance to move upward until it pushes the control voltage to decelerate. The friction block 33 contacts and rubs with the central rotating shaft for secondary braking, and then the third step of friction braking can be intervened in the process of continuous pulling 17 and continuous pressure. The transmission rod 32 in the synchronization component can be used to drive the pry plate component 37 to pry the movable plate 35 on the long-distance friction component downward to press the friction block 33 to further rub the central rotating shaft. This technology can perform emergency braking in the event of an emergency power outage, and perform two braking processes during the braking process, avoiding the high temperature generated by a large-scale friction braking affecting the physical properties of the central rotating shaft and the damage to the surrounding electromagnetic components caused by local heating.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An electromagnetic brake structure for oil drilling, comprising a power conversion module (1) and a brake assembly (2); the power conversion module (1) comprises a three-phase rectifier (11), the output end of the three-phase rectifier (11) is fixedly connected to a DC chopper (12), the output end of the DC chopper (12) is fixedly connected to a magnetic potentiometer (13), the outer side of the magnetic potentiometer (13) is fixedly connected to a control box (14), the upper side of the magnetic potentiometer (13) is rotatably connected to a joystick (17), the upper side wall of the control box (14) is provided with a through hole (18), the two side walls of the through hole (18) are provided with a slide groove (19), the inner cavity of the slide groove (19) is slidably connected to a slider (110), the slider (110) is fixedly connected to the joystick (17), the DC chopper (12) is electrically connected to the three-phase rectifier (11) and the magnetic potentiometer (13), and is characterized in that: The brake assembly (2) comprises a coil (22), the coil (22) being fixedly connected to the output end of the magnetically sensitive potentiometer (13), the outer side of the coil (22) being fixedly connected to a stator (21), a side wall of the stator (21) being fixedly connected to a flange (27), a surface of the flange (27) being evenly provided with fixing screw holes (28), an inner side wall of the stator (21) being rotatably connected to a rotor (25), a spring sheet (23) being fixedly connected between the rotor (25) and the stator (21), a bolt hole (24) being provided on the outer side wall of the rotor (25), the magnetically sensitive potentiometer (13) being electrically connected to the coil (22), and a deceleration assembly for further deceleration being further provided on one side of the flange (27); The deceleration component comprises a brake box (34) fixedly connected to the flange (27) and having a coolant arranged therein, the central rotating shaft passing through the brake box (34) and being movably connected to the flange (27) via a sealed bearing, friction components are arranged on both sides of the central rotating shaft inside the brake box (34), and the two friction components are at different linear distances from the central rotating shaft, the friction components are slidably connected to the inner wall of the brake box (34), the operating rod (17) is also hinged with a trigger rod (4), one end of the trigger rod (4) is hinged with a friction component close to the central rotating shaft in a linear distance, and is pulled by the operating rod (17) to drive the friction component close to the central rotating shaft to rub against the central rotating shaft to decelerate, a synchronization mechanism is arranged between the two friction components, the friction component close to the central rotating shaft continues to pull and move while contacting the central rotating shaft for friction braking, thereby increasing the pressure of the friction component, and at the same time, the friction component far away is driven by the synchronization mechanism to continuously approach the central rotating shaft and finally contact with it to generate further friction braking.

2. The electromagnetic brake structure for oil drilling according to claim 1, characterized in that: The friction assembly comprises a friction block (33) that contacts and rubs against the central rotating shaft, a movable plate (35) that is slidably connected to the inner wall of the brake box (34) is arranged on the outer side of the friction block (33), a telescopic rod is arranged between the movable plate (35) and the friction block (33), and a spring (36) is sleeved on the outer side of the telescopic rod.

3. The electromagnetic brake structure for oil drilling according to claim 2, characterized in that: The synchronization mechanism comprises a transmission rod (32) fixedly connected to a moving plate (35) in a short-distance friction assembly, one end of the transmission rod (32) being movably connected to a pry plate assembly (37), the pry plate assembly (37) being movably connected to a rotating rod (31) inside and movably connected to an inner wall of a brake box (34) via the rotating rod (31), and one end of the pry plate assembly (37) pressing on the moving plate (35) of the long-distance friction assembly.

4. The electromagnetic brake structure for oil drilling according to claim 3, characterized in that: The pry plate assembly (37) comprises a pry plate body (371) movably connected to the rotating rod (31), a second slide groove (372) is provided inside the pry plate body (371), and a rotating shaft on the transmission rod (32) movably connected to the pry plate body (371) is slidably arranged inside the second slide groove (372).

5. The electromagnetic brake structure for oil drilling according to claim 1, characterized in that: A mounting plate (15) is fixedly connected to the lower side wall of the control box (14), and a rubber sheath (111) is fixedly connected to one end of the joystick (17) away from the magnetically sensitive potentiometer (13).

6. The electromagnetic brake structure for oil drilling according to claim 1, characterized in that: A protective cover (16) is fixedly connected to the inner cavity of the control box (14), the protective cover (16) is slidably connected to the magnetically sensitive potentiometer (13), and a key slot (26) is provided on the inner side wall of the rotor (25).

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