A double-drive, double-brake hydraulic winch

Abstract

The present invention relates to a dual-drive, dual-brake hydraulic winch, belonging to the field of oil drilling rigs, including a winch frame, a first valve group, a second valve group, a first hydraulic motor, a second hydraulic motor, a first clutch, a second clutch, a gear box, an internal brake, a planetary reducer, a drum body, a support shaft assembly, a brake disc, an external brake and a rope presser, wherein one end of the planetary reducer is fixed to the winch frame, and the other end is connected to the drum body and then installed on the other side of the winch frame through the support shaft assembly; the hydraulic motor and the clutch are connected to the gear box and then installed on the input side of the planetary reducer, and the internal brake is sleeved on the output shaft of the gear box; brake discs are connected to both sides of the drum body, and the external brakes are installed on both sides of the brake disc on the winch frame. The present invention realizes one use and one standby by setting two sets of drive units (valve group / hydraulic motor / clutch), thereby improving system reliability; at the same time, two sets of internal and external brakes are set to improve safety and avoid safety accidents.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling and mechanical equipment, and in particular to a double-drive and double-brake hydraulic winch. Background Art

[0002] In some land or offshore drilling platforms, due to limitations on platform space, the drilling rig derrick / base adopts a vertical lifting design structure. Due to the heavy weight of the drilling rig base / derrick and the high lifting height, it is generally necessary to use multiple hydraulic winches to simultaneously lift the drilling rig.

[0003] The hydraulic winch used for drilling rig lifting in the prior art has the following problems: 1) The hydraulic winch is driven by a single hydraulic motor / valve group. If the motor / valve group of any winch fails during the lifting process, the lifting operation of the entire drilling rig will be blocked; 2) The winch adopts a braking mode that combines a balance valve and an internal brake (wet multi-disc brake). Once the balance pressure or the internal brake fails, there is a risk of machine destruction and loss of life, which will cause great economic losses to users. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a dual-drive, dual-brake hydraulic winch, comprising a winch frame, a first valve group, a second valve group, a first hydraulic motor, a second hydraulic motor, a first clutch, a second clutch, a gear box, an internal brake, a planetary reducer, a drum body, a support shaft assembly, a brake disc, an external brake, and a rope presser; the first valve group comprises a first stop valve, a second stop valve, a first shuttle valve, a first two-way balancing valve, a first pressure reducing valve, a second pressure reducing valve, a first one-way throttle valve, a first one-way pressure reducing valve, a first hydraulically controlled reversing valve, and a second shuttle valve; the second valve group comprises a third stop valve, a fourth stop valve, a third shuttle valve, a second two-way balancing valve, a third pressure reducing valve, a fourth pressure reducing valve, a second one-way throttle valve, a second one-way pressure reducing valve, and a second hydraulically controlled reversing valve.

[0005] The planetary reducer is a shell-rotating reducer, one end of which is fixed on the winch frame, and the other end is connected to the drum body and then installed on the other side of the winch frame through the support shaft assembly; the first hydraulic motor is fixedly installed on the gear box after being connected to the first clutch, and is connected to the first input shaft of the gear box; the second hydraulic motor is fixedly installed on the gear box after being connected to the second clutch, and is connected to the second input shaft of the gear box; the gear box is fixedly installed on the planetary reducer, and the output shaft of the gear box is connected to the input shaft of the planetary reducer; the internal brake is sleeved on the output shaft of the gear box; the brake disc is connected and fixed on both sides of the drum body, and the external brake is installed and fixed on the winch frame, on both sides of the brake disc; the first valve group and the second valve group are installed and fixed on the winch frame, and are connected to the hydraulic motor and clutch assembly through pipelines; the rope presser is installed on the rope outlet side of the drum body.

[0006] Preferably, the present invention provides two sets of independent drive units (valve group / hydraulic motor / clutch), which respectively drive the planetary reducer and the reel through the gear box. When one of the drive units fails, the other drive unit can be quickly called by switching the shut-off valve on the oil circuit.

[0007] Preferably, a first stop valve and a second stop valve are provided on the oil circuit of the first valve group, and a third stop valve and a fourth stop valve are provided on the oil circuit of the second valve group; when the first and second stop valves are opened and the third and fourth stop valves are closed, the first hydraulic motor and the first clutch are put into operation; when the third and fourth stop valves are opened and the first and second stop valves are closed, the second hydraulic motor is put into operation; in this way, by closing / opening the stop valves, the oil circuit of the hydraulic motor can be quickly switched so that the corresponding hydraulic motor is put into operation.

[0008] Preferably, the present invention is provided with two sets of brakes, namely the inner brake and the outer brake, which improves the safety of the equipment. The inner brake is a wet multi-disc brake, which is mounted on the output shaft of the gear box. The outer brake is a normally closed brake, which is mounted and fixed on the winch frame and arranged in pairs on both sides of the brake disc. The outer brakes are symmetrically arranged in pairs, which ensures the force balance of the drum body under braking conditions and increases the stability and safety of the system.

[0009] Preferably, the present invention arranges the first and second clutches (normally closed wet multi-plate brakes) on the output sides of the first hydraulic motor and the second hydraulic motor, that is, the clutch opens when oil is supplied, and closes under the action of the spring when oil is cut off; when the first hydraulic motor is working, the pressure oil in the hydraulic motor oil circuit automatically disconnects the second clutch, so that when the first hydraulic motor drives the first clutch, gear box, planetary reducer, and drum to rotate, the second clutch is disconnected, and the second hydraulic motor will not rotate with it, thereby avoiding damage to the hydraulic motor due to idling; and vice versa.

[0010] Preferably, the present invention is provided with a rope presser on the rope outlet side of the winch drum body. When the steel wire rope is wound on the drum, the rope presser presses the steel wire rope tightly under the action of a spring, which is conducive to neatly arranging the ropes.

[0011] The beneficial effects of the present invention are:

[0012] 1) Two sets of independent drive units (valve group / hydraulic motor / clutch) are set to drive the planetary reducer and the drum. When one of the drive units fails, it can be quickly switched to the other spare drive unit. The two drive systems are used as a backup and the other as a backup, which improves the reliability of the system.

[0013] 2) The safety of the system is improved by setting up two sets of braking systems, internal brake and external brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of the internal structure of a dual-drive, dual-brake hydraulic winch of the present invention;

[0015] Figure 2 It is a side structural schematic diagram of a dual-drive, dual-brake hydraulic winch of the present invention;

[0016] Figure 3 It is a schematic diagram of the assembly structure of a first hydraulic motor, a second hydraulic motor, a first clutch, a second clutch, a gear box and a reducer in a dual-drive, dual-brake hydraulic winch of the present invention;

[0017] Figure 4 The present invention is a schematic diagram of the control oil circuit principle of a dual-drive, dual-brake hydraulic winch.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1- winch frame, 2- first valve group, 3- second valve group, 4- first hydraulic motor, 5- second hydraulic motor, 6- first clutch, 7- second clutch, 8- gearbox, 9- internal brake (wet multi-disc brake), 10- planetary reducer, 11- drum body, 12- support shaft assembly, 13- brake disc, 14- external brake, 15- rope presser, 201- first stop valve, 202- second stop valve, 203- first shuttle valve, 204- first two-way Balancing valve, 205-first pressure reducing valve, 206-second pressure reducing valve, 207 first one-way throttle valve, 208 first one-way pressure reducing valve, 209-first hydraulically controlled reversing valve, 210-second shuttle valve, 301-third stop valve, 302-fourth stop valve, 303-second shuttle valve, 304-second two-way balancing valve, 305-third pressure reducing valve, 306-fourth pressure reducing valve, 307-second one-way throttle valve, 308-second one-way pressure reducing valve, 309-second hydraulically controlled reversing valve. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, a dual-drive, dual-brake hydraulic winch includes a winch frame 1, a first valve group 2, a second valve group 3, a first hydraulic motor 4, a second hydraulic motor 5, a first clutch 6, a second clutch 7, a gear box 8, an internal brake 9, a planetary reducer 10, a drum body 11, a support shaft assembly 12, a brake disc 13, an external brake 14, and a rope presser 15; the first valve group 2 includes a first stop valve 201, a second stop valve 202, a first shuttle valve 203, a first two-way balance valve 204, a first pressure reducing valve 205, a second pressure reducing valve 206, a first one-way throttle valve 207, a first one-way pressure reducing valve 208, a first hydraulically controlled reversing valve 209, and a second shuttle valve 210; the second valve group 3 includes a third stop valve 301, a fourth stop valve 302, a second shuttle valve 303, a second two-way balancing valve 304, a third pressure reducing valve 305, a fourth pressure reducing valve 306, a second one-way throttle valve 307, a second one-way pressure reducing valve 308, and a second hydraulically controlled reversing valve 309;

[0021] The planetary reducer 10 is a shell-rotating reducer, one end of which is fixed to the winch frame 1, and the other end is connected to the drum body 11 and installed on the other side of the winch frame 1 through the support shaft assembly 12;

[0022] The first hydraulic motor 4 is connected to the first clutch 6 and fixedly mounted on the gearbox 8, and is connected to the first input shaft of the gearbox 8; the second hydraulic motor 5 is connected to the second clutch 7 and fixedly mounted on the gearbox 8, and is connected to the second input shaft of the gearbox 8; the gearbox 8 is fixedly mounted on the planetary reducer 10, and the output shaft of the gearbox 8 is connected to the input shaft of the planetary reducer 10; the internal brake 9 is mounted on the output shaft of the gearbox 8; brake discs 13 are connected and fixed on both sides of the drum body 11, and the external brake 14 is installed and fixed on the winch frame 1, on both sides of the brake disc 13; the first valve group 2 and the second valve group 3 are installed and fixed on the winch frame 1, and are connected to the first hydraulic motor 4, the second hydraulic motor 5, the first clutch 6, and the second clutch 7 components through pipelines; the rope presser is installed on the rope outlet side of the drum body.

[0023] The present invention sets two sets of independent driving units (valve group / hydraulic motor / clutch), which drive the planetary reducer 10 and the reel 11 respectively through the gear box 8. When one set of driving units fails, the other set of driving units can be quickly called by switching the stop valve of the oil circuit. Specifically as follows: the first stop valve 201 and the second stop valve 202 are set on the oil circuit of the first valve group 2, and the third stop valve 301 and the fourth stop valve 302 are set on the oil circuit of the second valve group 3; when the first stop valve 201 and the second stop valve 202 are opened, and the third stop valve 301 and the fourth stop valve 302 are closed, the first hydraulic motor 4 and the first clutch 6 are put into operation; when the third stop valve 301 and the fourth stop valve 301 are opened, and the first stop valve 201 and the second stop valve 202 are closed, the second hydraulic motor 5 is put into operation; in this way, by closing / opening one set of stop valves, the oil circuit of the hydraulic motor can be quickly switched, so that the corresponding hydraulic motor is put into operation, and the two sets of driving units are used and the other is reserved, thereby improving the reliability of the system.

[0024] The present invention is provided with two sets of brakes, an inner brake 9 and an outer brake 14, which improves the safety of the equipment. The inner brake 9 is a normally closed wet multi-disc brake, which is mounted on the output shaft of the gear box 8. The outer brake 14 is a normally closed brake, which is installed and fixed on the winch frame 1 and arranged in pairs on both sides of the brake disc 13. The outer brake 14 is symmetrically arranged in pairs, which ensures the force balance of the drum body 11 under braking conditions and increases the safety of the system. Among them, the opening / closing of the inner brake 9 is controlled by the oil circuit inside the valve group. When the winch is started, the control oil circuit simultaneously supplies oil to the inner brake 9, opens the inner brake 9, and the winch rotates; when the winch stops, the control oil circuit stops supplying oil to the inner brake 9, and the inner brake 9 is closed under the action of the spring; according to different operating conditions, the opening / closing of the outer brake 14 can be controlled by the external oil circuit (external control) or the internal oil circuit of the valve group (internal control). When the outer brake 14 adopts the external control mode, before the winch is started, the outer brake 14 is first supplied with oil to open the outer brake 14, and then the winch is started; when the outer brake 14 adopts the internal control mode, when the winch is started or stopped, the outer brake is opened or closed at the same time; under emergency conditions, the outer brake 14 can be quickly controlled to brake to ensure safety.

[0025] The present invention arranges a first clutch (normally closed wet multi-plate brake) 6 on the output side of the first hydraulic motor 4 and a second clutch (normally closed wet multi-plate brake) 7 on the output side of the second hydraulic motor 5. When the first hydraulic motor 4 is working, the oil circuit of the first valve group 2 automatically disconnects the second clutch 7, so that the second hydraulic motor 5 will not rotate accordingly, thereby avoiding damage to the hydraulic motor due to oil-free idling; conversely, when the second hydraulic motor 5 is working, the oil circuit of the second valve group 3 automatically disconnects the first clutch 6, so that the first hydraulic motor 4 will not rotate accordingly, thereby avoiding damage to the hydraulic motor due to oil-free idling.

[0026] The rope outlet side of the drum 11 of the present invention is provided with a rope presser 15. When the steel wire rope is wound on the drum 11, the rope presser 15 presses the steel wire rope tightly under the action of a spring, which is conducive to neatly arranging the rope.

[0027] The present invention arranges a first shuttle valve 203, a first two-way balancing valve 204, a first pressure reducing valve 205, a second pressure reducing valve 206, a first one-way throttle valve 207, a first one-way pressure reducing valve 208, a first hydraulically controlled reversing valve 209, and a second shuttle valve 210 in the first valve group 2; the oil circuit system connects the hydraulic oil of the main oil circuit A and B ports with the oil circuit of the internal brake 9 through the first shuttle valve 203, the first one-way pressure reducing valve 208, the first hydraulically controlled reversing valve 209, the first one-way throttle valve 207, and the second shuttle valve 210, and when the A or B main oil circuit is supplied with oil, the internal brake 9 is opened at the same time; the two-way balancing valve 204 is arranged to balance the system pressure to ensure the system safety; the first pressure reducing valve 205 and the second pressure reducing valve 206 are arranged to ensure that the system pressure of the first hydraulic motor is not too high to damage the equipment whether it is in the lifting or lowering working condition; the working principle of the second valve group 3 is the same as that of the first valve group 2.

[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included in the protection scope of the present invention.

Claims

1. A dual-drive, dual-brake hydraulic winch, characterized in that: include: A winch frame (1), a first valve group (2), a second valve group (3), a first hydraulic motor (4), a second hydraulic motor (5), a first clutch (6), a second clutch (7), a gear box (8), an internal brake (9), a planetary reducer (10), a drum body (11), a support shaft assembly (12), a brake disc (13), an external brake (14), and a rope presser (15). The planetary reducer (10) is a shell-rotating reducer. One end of the planetary reducer (10) is fixed to the winch frame (1), and the other end is connected to the drum body (11) and then installed on the other side of the winch frame through the support shaft assembly (12); the first hydraulic motor (4) is connected to the first clutch (6) and then fixedly installed on the gear box (8), and is connected to the first input shaft of the gear box (8); the second hydraulic motor (5) is connected to the second clutch (7) and then fixedly installed on the gear box (8), and is connected to the second input shaft of the gear box; the gear box (8) is fixedly installed on the planetary reducer (10). The output shaft of the gearbox is connected to the input shaft of the planetary reducer (10); the internal brake (9) is mounted on the output shaft of the gearbox (8); the brake disc (13) is connected and fixed on both sides of the drum body (11); the external brake (14) is installed and fixed on the winch frame (1), on both sides of the brake disc (13); the first valve group (2) and the second valve group (3) are installed and fixed on the winch frame (1), and are connected to the first hydraulic motor (4), the second hydraulic motor (5), the first clutch (6), and the second clutch (7) components through oil pipelines; the rope presser (15) is installed on the rope outlet side of the drum body (11).

2. A dual-drive, dual-brake hydraulic winch according to claim 1, characterized in that: The winch is provided with two sets of drive units, namely, a first valve group (2), a first hydraulic motor (4), a first clutch (6), and a second valve group (3), a second hydraulic motor (5), and a first clutch (7). The two sets of drive units are mounted on the gear box (8), and then mounted as a whole on the planetary reducer (10). The output shafts of the two sets of drive units are respectively connected to the first input shaft and the second input shaft of the gear box (8), and the output shaft of the gear box (8) is connected to the input shaft of the planetary reducer (10).

3. A dual-drive, dual-brake hydraulic winch according to claim 1, characterized in that: The winch is provided with two sets of brakes, namely the inner brake (9) and the outer brake (14). The inner brake (9) is a wet multi-disc brake mounted on the output shaft of the gear box (8). The outer brake (14) is a normally closed brake mounted and fixed on the winch frame (1) and arranged in pairs on both sides of the brake disc (14).

4. A dual-drive, dual-brake hydraulic winch according to claim 1, characterized in that: The first valve group (2) comprises a first stop valve (201), a second stop valve (202), a first shuttle valve (203), a first two-way balancing valve (204), a first pressure reducing valve (205), a second pressure reducing valve (206), a first one-way throttle valve (207), a first one-way pressure reducing valve (208), a first hydraulically controlled reversing valve (209), and a second shuttle valve (210); the second valve group (3) comprises a third stop valve (301), a fourth stop valve (302), a third shuttle valve (303), a second two-way balancing valve (304), a third pressure reducing valve (305), a third pressure reducing valve (306), a second one-way throttle valve (307), a second one-way pressure reducing valve (308), and a second hydraulically controlled reversing valve (309); the first valve group (2) and the second valve group (3) are mounted and fixed on the winch frame (1), and are respectively connected to the hydraulic motor and the clutch.

5. The dual-drive, dual-brake hydraulic winch according to claim 1, characterized in that: The gearbox (8) is fixed on the planetary reducer (10) and its output shaft is drivingly connected to the input shaft of the planetary reducer (10); the gearbox (8) is provided with a first input shaft and a second input shaft; the first hydraulic motor (4) is drivingly connected to the first input shaft of the gearbox (8) via a first clutch (6); and the second hydraulic motor (5) is drivingly connected to the second input shaft of the gearbox (8) via a second clutch (7).

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