Buffering brake device of winch

Abstract

The winch buffer braking device comprises a weighing sensor, a rotating speed sensor and a control box, the weighing sensor is arranged between a heavy object and a crown block, the rotating speed sensor is in transmission connection with a roller shaft on a winch, brake discs are arranged on the two sides of a winch roller, and each brake disc is provided with a brake executing mechanism; a control unit and an information acquisition unit are integrated in the control box, signal lines of the weighing sensor and the rotating speed sensor are connected into the information acquisition unit, the control unit is externally connected with a power mechanism, and the control unit is also externally connected with a brake control button; the output end of the power mechanism is connected with the brake executing mechanism. According to the device, the braking mode can be automatically judged and selected according to the weight of a heavy object hung on the winch and the lowering speed, and buffering braking can be carried out on the winch in various braking states; potential damage to the winch and peripheral structures caused by one-time braking is avoided, and meanwhile the personal safety of operators can be effectively protected.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling equipment and relates to a drawworks buffer brake device. Background Art

[0002] At present, oil drilling equipment mostly uses winches for lifting operations, and the lifting load is large. Most winches use disc brakes or belt brakes. When a large weight hanging on the winch wire rope falls rapidly, if the brakes are suddenly applied, the disc brake or belt brake will instantly stop the winch drum shaft. Due to the huge inertia of the heavy object, it is easy to cause a large impact on the winch and surrounding structures, causing potential damage, and there is also a certain risk to the personal safety of the operator.

[0003] Therefore, it is urgent to develop a winch buffer brake device to solve the above-mentioned technical difficulties. Summary of the invention

[0004] The purpose of the present invention is to provide a winch buffer brake device, which solves the problem in the prior art that when the winch is in emergency braking, the heavy objects suspended from the winch are likely to cause a large impact on the winch and surrounding structures, resulting in potential injuries, and there are also unpredictable dangers to the personal safety of the operator.

[0005] The technical solution adopted by the present invention is a winch buffer brake device, including a weighing sensor, a speed sensor and a control box, a weighing sensor is arranged between the weight and the overhead crane, the speed sensor is connected to the drum shaft on the winch, brake discs are arranged on both sides of the winch drum, and each brake disc is provided with a brake actuator; a control unit and an information acquisition unit are integrated in the control box, signal lines of the weighing sensor and the speed sensor are connected to the information acquisition unit, the control unit is externally connected to a power mechanism, and the control unit is also externally connected to a brake control button; the output end of the power mechanism is connected to the brake actuator.

[0006] The winch buffer brake device of the present invention is also characterized in that:

[0007] The control unit pre-stores a control program for four buffer braking modes, in which a mass threshold and a speed threshold are preset to judge the weight of the heavy object and the speed of falling. By starting the brake control button, the corresponding control mode is started.

[0008] The weighing sensor is installed on a fixed pulley or connected to a steel wire rope.

[0009] The brake actuator is a disc brake or a belt brake.

[0010] The control box is integrated with the drawworks body, or the control box is integrated into the drilling rig electrical control on the derrick.

[0011] The power mechanism uses hydraulic power or electric power.

[0012] The beneficial effect of the present invention is that it can automatically judge and select the braking mode according to the weight of the weight suspended by the winch and the lowering speed, and the winch can be subjected to buffer braking in various braking states; especially when the weight is heavy and the winch speed is fast, the winch is braked by intermittent rapid braking, which can not only quickly decelerate and brake the winch, but also intermittently release the impact of the suspended weight during the braking process, thereby avoiding potential damage to the winch and surrounding structures caused by one braking, and at the same time effectively protecting the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the front view installation structure of the device of the present invention on the derrick;

[0014] Figure 2 It is a schematic diagram of the installation structure of the device of the present invention on the derrick from the left;

[0015] Figure 3 It is a schematic diagram of the control principle of the device of the present invention;

[0016] Figure 4 It is a schematic diagram of the braking process of the device of the present invention when the weight of the heavy object is large and the speed of the winch is fast;

[0017] Figure 5 It is a schematic diagram of the braking process of the device of the present invention when the weight of the heavy object is large and the speed of the winch is slow;

[0018] Figure 6 It is a schematic diagram of the braking process of the device of the present invention when the weight of the heavy object is small and the speed of the winch is fast;

[0019] Figure 7 The figure is a schematic diagram of the braking process of the device of the present invention when the weight of the heavy object is small and the speed of the winch is slow.

[0020] In the figure, 1. overhead crane; 2. weighing sensor; 3. fixed pulley; 4. derrick; 5. winch; 51. operating handle; 52. brake control button; 53. brake disc; 54. drum shaft; 55. coupling; 6. brake actuator; 7. control box; 71. control unit; 72. information collection unit; 8. speed sensor; 9. power mechanism; 10. wire rope; 11. heavy object. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figure 1 , Figure 2 , Figure 3The structure of the device of the present invention is that it includes a weighing sensor 2, a speed sensor 8 and a control box 7. The weighing sensor 2 is arranged between the overhead crane 1 and the weight 11. The speed sensor 8 is connected to the drum shaft 54 ​​on the winch 5 through a coupling 55. Brake discs 53 are arranged on both sides of the drum of the winch 5. Each brake disc 53 is provided with a brake actuator 6; a control unit 71 and an information acquisition unit 72 are integrated in the control box 7. The signal lines of the weighing sensor 2 and the speed sensor 8 are connected to the information acquisition unit 72. The control unit 71 is externally connected to a power mechanism 9, and the control unit 71 is also externally connected to a brake control button 52; the output end of the power mechanism 9 is connected to the brake actuator 6, the brake mechanism 6 relies on the power mechanism 9 to provide power, and the brake actuator 6 is then connected to the winch 5 driving.

[0023] The wire rope 10 on the drum of the winch 5 passes through the fixed pulley 3 to suspend the weight 11, and the fixed pulley 3 is suspended below the overhead crane 1 through the weighing sensor 2. The weighing sensor 2 can monitor the weight of the weight 11 acting on the fixed pulley 3 through the wire rope 10 in real time, and transmit it to the information acquisition unit 72 in real time. The weighing sensor 2 can be installed on the fixed pulley 3 or connected to the wire rope 10. The electric winch can also detect the load of the weight lifted by the winch by detecting the current of the winch.

[0024] The speed sensor 8 is connected to the drum shaft 54 ​​of the winch 5 via a coupling 55 , and monitors the speed of the winch drum in real time and transmits it to the information acquisition unit 72 .

[0025] The control unit 71 outputs a control signal to the power mechanism 9 according to the signals of the weighing sensor 2 and the speed sensor 8 collected by the information collection unit 72. The power mechanism 9 then outputs a power signal to the brake actuator 6 according to the control signal, and the brake actuator 6 then drives the winch 5 to operate.

[0026] The brake actuator 6 is a disc brake or a band brake, and the power mechanism 9 is a hydraulic power or an electric power. The control box 7 can be integrated with the drawworks 5 body, and can also be integrated into the drilling rig electric control on the derrick 4.

[0027] The working process of the present invention is:

[0028] When the winch 5 is being raised or lowered, the winch 5 is controlled to rotate forward or reversely by an operating handle 51 disposed on the winch 5 .

[0029] When the winch 5 suspends the weight 11 through the steel wire rope 10 and the weight 11 is lowered, the control procedures of the device of the present invention include the following four types:

[0030] 1) If Figure 4As shown, when the suspended weight 11 is heavy and falls quickly, the brake control button 52 is activated, and the information acquisition unit 72 detects that the suspended weight is large and the drum speed of the winch 5 is fast, and transmits the information to the control unit 71. The control unit 71 outputs a continuous braking pulse control signal ① to the power mechanism 9, and the power mechanism 9 outputs a continuous braking pulse power signal to the brake actuator 6, so that the brake actuator 6 quickly and intermittently clamps the brake disc 53 (i.e., performs a braking action), thereby quickly reducing the speed of the drum of the winch 5 and intermittently releasing the falling impact of the falling weight 11. When the falling speed of the heavy object 11 drops to a certain value, and the information acquisition unit 72 monitors that the drum speed of the winch 5 drops to a certain value, the control unit 71 sends a short-term continuously increasing brake control signal ② to the power mechanism 9, and the power mechanism 9 sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch.

[0031] 2) If Figure 5 As shown, when the suspended weight 11 is heavy and falls slowly, the brake control button 52 is pressed, and the information acquisition unit 72 detects that the suspended weight is large and the drum speed of the winch 5 is slow, and transmits the information to the control unit 71. The control unit 71 sends a short-term continuously increasing brake control signal to the power mechanism 9, and the power mechanism 9 then sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch 5.

[0032] 3) If Figure 6 As shown, when the suspended weight 11 is light and falls quickly, the brake control button 52 is pressed, and the information acquisition unit 72 detects that the suspended weight is small and the drum speed of the winch 5 is fast, and transmits the information to the control unit 71. The control unit 71 sends a short-term continuously increasing brake control signal to the power mechanism 9, and the power mechanism 9 sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch 5.

[0033] 4) If Figure 7As shown, when the suspended weight 11 is light and falls slowly, the brake control button 52 is pressed, and the information acquisition unit 72 detects that the suspended weight is small and the drum speed of the winch 5 is slow, and transmits the information to the control unit 71. The control unit 71 sends an instantaneous brake control signal to the power mechanism 9, and the power mechanism 9 sends an instantaneous brake power signal to the brake actuator 6. The brake actuator 6 instantly locks the brake disc 53 of the winch 5 completely to achieve braking of the winch 5.

[0034] The above four control modes are pre-programmed with control programs, and the control programs are pre-stored in the control unit 71. The control program presets a mass threshold and a speed threshold, so as to judge the weight of the weight 11 and the speed of the fall, and start the corresponding control mode accordingly.

[0035] Example 1

[0036] A 2-ton weight is lowered using the device of the present invention, and the falling speed is detected to be 2 m / s. The brake control button 52 is pressed, and the information acquisition unit 72 detects that the suspended weight is large and the drum speed of the winch 5 is fast, and transmits the information to the control unit 71. The control unit 71 outputs a continuous brake pulse control signal ① to the power mechanism 9, and the power mechanism 9 outputs a continuous brake pulse power signal to the brake actuator 6, so that the brake actuator 6 quickly and intermittently clamps the brake disc 53 (point braking), thereby quickly reducing the speed of the drum of the winch 5 and intermittently releasing the falling impact of the falling weight 11. When the falling speed of the heavy object 11 drops to a certain value, and the information acquisition unit 72 monitors that the drum speed of the winch 5 drops to a certain value, the control unit 71 sends a short-term continuously increasing brake control signal ② to the power mechanism 9, and the power mechanism 9 sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch 5.

[0037] Example 2

[0038] A 2-ton weight is lowered using the device of the present invention, and the falling speed is detected to be 0.5 m / s. The brake control button 52 is pressed at this time, and the information acquisition unit 72 detects that the suspended weight is large and the drum speed of the winch 5 is slow, and transmits the information to the control unit 71. The control unit 71 sends a short-term continuously increasing brake control signal to the power mechanism 9, and the power mechanism 9 then sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch 5.

[0039] Example 3

[0040] A weight of 0.2 tons is lowered using the device of the present invention, and the falling speed is detected to be 2 m / s. At this time, the brake control button 52 is pressed, and the information acquisition unit 72 detects that the hanging weight is small and the drum speed of the winch 5 is fast, and transmits the information to the control unit 71. The control unit 71 sends a short-term continuously increasing brake control signal to the power mechanism 9, and the power mechanism 9 sends a short-term continuously increasing brake power signal to the brake actuator 6. The brake actuator 6 continuously increases the braking force of the brake disc 53 of the winch 5, and implements buffer braking on the winch 5 until the brake disc 53 of the winch 5 is completely locked, thereby achieving braking of the winch 5.

[0041] Example 4

[0042] A weight of 0.2 tons is lowered using the device of the present invention, and the falling speed is detected to be 0.2 m / s. At this time, the brake control button 52 is pressed, and the information acquisition unit 72 detects that the suspended weight is small and the drum speed of the winch 5 is slow, and transmits the information to the control unit 71. The control unit 71 sends an instantaneous brake control signal to the power mechanism 9, and the power mechanism 9 sends an instantaneous brake power signal to the brake actuator 6. The brake actuator 6 instantly locks the brake disc 53 of the winch 5 completely, thereby braking the winch 5.

Claims

1. A winch buffer brake device, characterized in that: The invention comprises a weighing sensor (2), a rotation speed sensor (8) and a control box (7); the weighing sensor (2) is arranged between an overhead crane (1) and a weight (11); the rotation speed sensor (8) is drivingly connected to a drum shaft (54) on a winch (5); brake discs (53) are arranged on both sides of the drum of the winch (5); each brake disc (53) is provided with a brake actuator (6); a control unit (71) and an information collection unit (72) are integrated in the control box (7); signal lines of the weighing sensor (2) and the rotation speed sensor (8) are connected to the information collection unit (72); the control unit (71) is externally connected to a power mechanism (9); the control unit (71) is also externally connected to a brake control button (52); the output end of the power mechanism (9) is connected to the brake actuator (6).

2. The winch buffer brake device according to claim 1, characterized in that: The control unit (71) has pre-stored control programs for four buffer braking modes, wherein a mass threshold and a speed threshold are preset in the control program to judge the weight of the heavy object (11) and the speed of its fall, and to activate the brake control button (52) to activate the corresponding control mode.

3. The winch buffer brake device according to claim 1, characterized in that: The weighing sensor (2) is installed on a fixed pulley (3) or connected to a steel wire rope (10).

4. The winch buffer brake device according to claim 1, characterized in that: The brake actuator (6) is a disc brake or a belt brake.

5. The winch buffer brake device according to claim 1, characterized in that: The control box (7) is integrated with the drawworks (5) body, or the control box (7) is integrated into the drilling rig electrical control on the derrick (4).

6. The winch buffer brake device according to claim 1, characterized in that: The power mechanism (9) is hydraulic power or electric power.

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