Double drum linkage winding lifting system

Abstract

This invention discloses a dual-drum linkage winding hoisting system, comprising a first hoisting drum and a second hoisting drum. The first and second hoisting drums are linked by an outer circumferential meshing structure or by a linkage intermediate component. The first hoisting drum is wound with a first hoisting rope, and the second hoisting drum is wound with a second hoisting rope. The first and second hoisting ropes are not connected to each other. This dual-drum linkage winding hoisting system can improve the energy efficiency ratio of ultra-deep well hoisting systems.

Description

Technical Field

[0001] The invention relates to the field of mine equipment, and in particular to a double-drum linkage winding type lifting system. Background Art

[0002] There are two types of existing hoisting systems, one is the winding type and the other is the friction type. For the winding type, in ultra-deep wells with a depth greater than 1200m, as the well depth increases, the proportion of the hoisting rope's own weight in the hoisting load increases rapidly, the effective load lifted becomes smaller and smaller, and the energy efficiency ratio of the hoisting system becomes lower and lower. For the friction type, it must use a tail rope. The deeper the depth, the longer the tail rope is, and the greater the weight of the tail rope itself. When the depth of the mine is greater than 1000m, the proportion of the hoisting rope's own weight in the hoisting load increases sharply, and the torque output by the drum is almost entirely used to carry the weight of the tail rope. The effective load lifted is sharply reduced, that is, the energy efficiency ratio is also very low. Therefore, the existing hoisting systems cannot solve the problem of low energy efficiency ratio in ultra-deep well hoisting systems. Summary of the invention

[0003] In view of this, an embodiment of the present invention is expected to provide a double-drum linkage winding lifting system that can improve the energy efficiency ratio in ultra-deep well lifting systems.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] A double-drum linkage winding lifting system, the system includes a first lifting drum and a second lifting drum, the first lifting drum and the second lifting drum are meshed and linked through an outer circumferential meshing structure or through a linkage intermediate piece; the first lifting drum is wound with a first lifting rope, the second lifting drum is wound with a second lifting rope, and the first lifting rope and the second lifting rope are not connected to each other.

[0006] In the above scheme, the axial ends of the first lifting roller and the second lifting roller are aligned and linked by a linkage middle piece; the linkage middle piece is movably installed at a linkage position between the first lifting roller and the second lifting roller; when the linkage middle piece moves out of the linkage position, the first lifting roller and the second lifting roller are disengaged from the linkage.

[0007] In the above scheme, the linkage intermediate piece includes a gear set, which is composed of one or more cylindrical gears; the first lifting roller is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of its circumference, and the second lifting roller is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of its circumference.

[0008] In the above scheme, the gear set includes two mutually meshing cylindrical gears at least at one end corresponding to the first lifting roller and the second lifting roller, and the opposite sides of the two cylindrical gears mesh with each other, and the other sides mesh with the first lifting roller and the second lifting roller respectively.

[0009] In the above scheme, the first lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof, and the second lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof; the gear set includes two mutually meshing cylindrical gears at both ends of the first lifting roller and the second lifting roller, and the opposite sides of the cylindrical gears at the same end are meshed with each other, and the other sides are respectively meshed with the first lifting roller and the second lifting roller.

[0010] In the above solution, both the first lifting drum and the second lifting drum include an outer rotor permanent magnet motor, and the outer shell of the rotor of the outer rotor permanent magnet motor is the drum of the first lifting drum or the second lifting drum.

[0011] In the above scheme, the system also includes a power supply device that can respectively control the outer rotor permanent magnet motor of the first lifting roller and the outer rotor permanent magnet motor of the second lifting roller, and the power supply device is electrically connected to the outer rotor permanent magnet motor of the first lifting roller and the outer rotor permanent magnet motor of the second lifting roller respectively.

[0012] In the above scheme, the system also includes a control device for controlling the operation of the system and a position monitoring device for monitoring the position of the lifting container; the control device is installed in the ground machine room, and the position monitoring device is installed on the derrick; the control device is electrically connected to the power supply device and the position monitoring device.

[0013] In the above solution, the system further comprises an over-winding protection device, which is installed on the derrick and electrically connected to the control device.

[0014] In the above solution, the system further comprises a braking device, and the braking device is installed on one side of the first lifting roller and / or the second lifting roller.

[0015] The double-drum linkage winding type lifting system of the embodiment of the present invention comprises a first lifting drum and a second lifting drum, the first lifting drum and the second lifting drum are meshed and linked via an outer circumferential meshing structure or via a linkage intermediate piece; the first lifting drum is wound with a first lifting rope, the second lifting drum is wound with a second lifting rope, and the first lifting rope and the second lifting rope are not connected to each other; it can be seen that the double-drum linkage winding type lifting system of the embodiment of the present invention links the two lifting drums, and since the force directions of the two lifting drums are opposite, the entire weight of the two lifting containers and most of the dead weight of the lifting ropes can be offset, thereby improving the energy efficiency ratio in the ultra-deep well lifting system.

[0016] Other beneficial effects of the embodiments of the present invention will be further described in the specific implementation manner in conjunction with the specific technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. It should be understood that the drawings described below are only part of the drawings of the embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of an ultra-deep well double-drum linkage winding lifting system provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a double-drum linkage winding lifting system for ultra-deep wells provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of a linkage middle piece in an ultra-deep well double-drum linkage winding lifting system provided by an embodiment of the present invention;

[0021] Figure 4 A schematic diagram showing a load comparison between an ultra-deep well double-drum linkage winding hoisting system provided by an embodiment of the present invention and a conventional non-linked winding hoisting system. DETAILED DESCRIPTION

[0022] An embodiment of the present invention provides a double-drum linkage winding lifting system, which includes a first lifting drum and a second lifting drum, and the first lifting drum and the second lifting drum are engaged and linked through an outer circumferential meshing structure or through a linkage intermediate piece; the first lifting drum is wound with a first lifting rope, and the second lifting drum is wound with a second lifting rope, and the first lifting rope and the second lifting rope are not connected to each other.

[0023] The lifting roller here is a winding roller; linkage refers to the linkage of rotation, that is, when one lifting roller rotates, the other lifting roller rotates synchronously. For the sake of simplicity, the first lifting roller and the second lifting roller are collectively referred to as lifting rollers.

[0024] The double-drum linked winding lifting system of the embodiment of the present invention links the two lifting drums. Since the force directions of the two lifting drums are opposite, the weight of the two lifting containers and most of the dead weight of the lifting ropes can be offset, thereby improving the energy efficiency ratio in the ultra-deep well lifting system.

[0025] In some other embodiments of the present invention, the axial ends of the first lifting roller and the second lifting roller are aligned and linked by a linkage middle piece; the linkage middle piece is movably installed at a linkage position between the first lifting roller and the second lifting roller; when the linkage middle piece moves out of the linkage position, the first lifting roller and the second lifting roller are disengaged. The linkage by the linkage middle piece has two beneficial effects:

[0026] First, the linkage between the first lifting drum and the second lifting drum can be easily released, that is, when the linkage middle piece is moved out of the linkage position, the linkage between the two can be released, which is convenient for adjusting the position relationship of the lifting containers corresponding to the two lifting drums, that is, when the unloading point or the loading point does not correspond, the rope can be adjusted quickly and conveniently, which is a better implementation method.

[0027] Second, the number of linkage intermediate pieces can be adjusted to control the rotation direction of the lifting drum, which is a better implementation method. Because the rotation direction of the lifting drum needs to be adjusted according to the direction in which the lifting rope is led out from the lifting drum, for example, see Figure 1 The lifting ropes are all led out from the top of the lifting drum, so the number of linkage middle pieces is appropriate. If the lifting rope of one of the lifting drums is led out from the bottom, it is necessary to reduce or increase one linkage middle piece.

[0028] In other embodiments of the present invention, the linkage intermediate member includes a gear set, which is composed of one or more cylindrical gears; the first lifting drum is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of the circumference thereof, and the second lifting drum is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of the circumference thereof. Gears are a rigid linkage, so there is no slippage, etc., the linear speed of the linkage is more consistent, and there is no need to frequently adjust the position of the lifting container, which is a better implementation method.

[0029] In some other embodiments of the present invention, the gear set includes two mutually meshing cylindrical gears at least at one end corresponding to the first lifting drum and the second lifting drum, and the two cylindrical gears mesh with each other on opposite sides, and mesh with the first lifting drum and the second lifting drum on the other side. The two cylindrical gears make the first lifting drum and the second lifting drum rotate in opposite directions, which meets the requirements of the floor-standing winding lifting system and is a better implementation.

[0030] In some other embodiments of the present invention, the first lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof, and the second lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof; the gear set includes two mutually meshing cylindrical gears at both ends of the first lifting roller and the second lifting roller, and the opposite sides of the cylindrical gears at the two same ends mesh with each other, and the other sides mesh with the first lifting roller and the second lifting roller, respectively. That is, the gear set has a total of four cylindrical gears, and the four cylindrical gears are fixed on two shafts respectively, and the two gears on the same shaft are respectively at the two ends of the lifting roller, so that the meshing of the teeth at both ends of the lifting roller and the gear set is more stable, and the meshing reaction force is smaller, which increases the service life of the teeth and gear set of the lifting roller, and is a better implementation method.

[0031] In some other embodiments of the present invention, the first lifting drum and the second lifting drum both include an outer rotor permanent magnet motor, and the outer shell of the rotor of the outer rotor permanent magnet motor is the drum of the first lifting drum or the second lifting drum.

[0032] The outer rotor permanent magnet motor has the beneficial effects of ultra-low frequency starting, low speed and high torque operation, and the rotor is also a drum, so no more transmission parts are required, and the starting power is further reduced, which is a better implementation method.

[0033] In some other embodiments of the present invention, the system also includes a power supply device that can respectively control the outer rotor permanent magnet motor of the first lifting roller and the outer rotor permanent magnet motor of the second lifting roller, and the power supply device is electrically connected to the outer rotor permanent magnet motor of the first lifting roller and the outer rotor permanent magnet motor of the second lifting roller, respectively.

[0034] In this way, the lifting system can be controlled to select three working states according to different situations by switching the power supply device: 1) only the first lifting roller rotates actively, and the second lifting roller rotates in conjunction; 2) only the second lifting roller rotates actively, and the first lifting roller rotates in conjunction; 3) both the first lifting roller and the second lifting roller rotate actively and in conjunction with each other. In this way, the power can be adjusted according to the load conditions, which is more energy-saving, and at the same time, the continuous working time of the driving device is reduced, and the service life is longer.

[0035] In other embodiments of the present invention, the system further comprises a control device for controlling the operation of the system and a position monitoring device for monitoring the position of the lifting container; the control device is installed in the ground machine room, and the position monitoring device is installed on the derrick; the control device is electrically connected to the power supply device and the position monitoring device. In this way, the control device can control the on and off of the power supply device according to the position of the position monitoring device, thereby controlling the operation of the lifting drum, which is a better implementation.

[0036] In other embodiments of the present invention, the system further comprises an overwinding protection device, which is installed on the derrick and electrically connected to the control device. In this way, it is possible to avoid the inertia of the lifting container during the lifting process, which causes the lifting container to continue to move upward after reaching the wellhead and damage the derrick and other facilities, which is a better implementation method.

[0037] In some other embodiments of the present invention, the system further comprises a braking device, which is installed on one side of the first lifting drum and / or the second lifting drum. In this way, in addition to the safety braking at the loading point or unloading point under normal circumstances, in the lifting process, if there is an unexpected situation such as a malfunction, the braking device can be used to brake and safely stop the system operation, which is a better implementation method. The braking device is installed on one side of the first lifting drum and / or the second lifting drum, which means that the braking device can be installed on one side of both lifting drums, or can be installed on only one side of any one of the lifting drums, because they are linked.

[0038] In order to understand the present invention more clearly, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the embodiments described below are only part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by ordinary technicians in the technical field based on these embodiments without paying creative work belong to the scope of protection of the present invention.

[0039] This embodiment provides a double-drum linkage winding hoisting system for ultra-deep mines. It can be understood that it can also be used in mines of other depths.

[0040] like Figure 1 , 2 As shown, the system includes a first lifting drum 10, a second lifting drum 20, a linkage middle piece, a first lifting rope 101, a second lifting rope 201, a power supply device 40, a control device 50, a position monitoring device, an overwinding protection device 70 and a braking device 80.

[0041] The first lifting drum 10 and the second lifting drum 20 are linked by a linkage intermediate piece; the first lifting drum 10 is wound with a first lifting rope 101, and the second lifting drum 20 is wound with a second lifting rope 201, and the first lifting rope 101 and the second lifting rope 201 are not connected to each other. A lifting container 102 is hoisted below the first lifting rope 101 and the second lifting rope 201, and the first lifting drum and the second lifting drum are both installed on a drum base 105.

[0042] The linkage middle piece is movably installed at a linkage position between the first lifting drum 10 and the second lifting drum 20; when the linkage middle piece moves out of the linkage position, the first lifting drum 10 and the second lifting drum 20 are disengaged from the linkage.

[0043] Specifically, see Figure 3 The linkage middle piece includes a linkage base 301 and a cylindrical gear 302. The linkage base 301 is installed on a guide rail 303. A hydraulic cylinder 304 is provided on the outside of the guide rail 303. The piston rod of the hydraulic cylinder 304 is connected to the linkage base 301. That is, through the hydraulic cylinder 304, the linkage middle piece can be translated to release the linkage between the first lifting roller 10 and the second lifting roller 20.

[0044] Among them, the linkage middle piece includes four cylindrical gears 302, and the four cylindrical gears 302 are respectively installed on the two shafts of the linkage base 301, and the two cylindrical gears on the same shaft are respectively at the two ends of the lifting drum; the first lifting drum 10 and the second lifting drum 20 are both provided with teeth meshing with the cylindrical gears on the circumference of their two ends.

[0045] Wherein, the first lifting drum 10 and the second lifting drum 20 both include an outer rotor permanent magnet motor, and the outer shell of the rotor of the outer rotor permanent magnet motor is the drum of the first lifting drum or the second lifting drum.

[0046] The system further includes a power supply device 40 capable of controlling the outer rotor permanent magnet motor of the first lifting drum 10 and the outer rotor permanent magnet motor of the second lifting drum 20, respectively, and the power supply device 40 is electrically connected to the outer rotor permanent magnet motor of the first lifting drum 10 and the outer rotor permanent magnet motor of the second lifting drum 20. Specifically, the power supply device 40 is electrically connected to the outer rotor permanent magnet motor through an electric wire 401.

[0047] The system further includes a control device 50 for controlling the operation of the system and a position monitoring device for monitoring the position of the lifting container; the control device 50 is installed in the ground machine room, and the position monitoring device is installed on the derrick 60; the control device 50 is electrically connected to the power supply device 40 and the position monitoring device. Specifically, the position monitoring device may include a sensor (not shown in the figure), and the sensor may be installed one at the loading position and one at the unloading position, and may also be installed at other required locations.

[0048] The system further includes an overwinding protection device 70, which is installed on the derrick 60 and is electrically connected to the control device 50. If the lifting container exceeds a preset depth due to inertia or other reasons, the overwinding protection device 70 will automatically start.

[0049] The system further includes a brake device 80, which is installed on one side of the first lifting drum 10 and the second lifting drum 20. Specifically, the brake device 80 can cooperate with the position monitoring device. For example, when the lifting container reaches the loading position or the unloading position, the sensor will transmit a signal back to the control device 50, and the control device 50 will instruct the brake device 80 to act.

[0050] Specifically, the drums of the two lifting drums are each provided with two winding areas, each winding area is wound with a lifting rope, that is, the first lifting rope 101 includes two lifting ropes, the two lifting ropes are arranged in parallel, one end is wound on the first lifting drum 10, and the other end is connected to the lifting container after passing through the sheave 103, and finally connected to the top of the same lifting container. Compared with a single rope connection, two lifting ropes can effectively reduce the maximum static tension of the lifting rope in deep well lifting, and can reduce the diameter of the lifting rope and the diameter of the lifting drum.

[0051] Similarly, the second hoisting rope 201 also includes two hoisting ropes, which are also arranged in parallel, one end of which is wound around the second hoisting drum 20, and the other end of which is connected to the hoisting container after passing through the sheave 203. The direction of the rope winding is the same as the direction of the first hoisting rope 101 winding around the first hoisting drum 10. More specifically, during operation, the second hoisting drum 20 is powered on, and the first hoisting drum 10 is not powered on. When the second hoisting drum 20 rotates, the torque is transmitted to the first hoisting drum 10 through the linkage middleware. Since the two hoisting drums transmit torque through the linkage middleware, the synchronous linkage between the two hoisting drums is very convenient. When the first hoisting rope 101 is released, the second hoisting rope 201 is retracted, that is, two hoisting containers can be in the well at the same time, that is, one is loaded and the other is unloaded, which can improve the working efficiency of the ultra-deep well hoisting system.

[0052] More importantly, during the lifting process, the two lifting drums are connected by a linkage middleware. The two lifting drums rotate in opposite directions but have the same rope winding direction. Based on the principle that counterclockwise torque and clockwise torque can offset each other, the deadweight of the lifting container and part of the lifting rope wound on the two lifting drums can offset each other, which greatly reduces the load borne by the lifting drums. This allows the power consumed by the lifting system in each cycle to be almost completely converted into the lifting effective load, with significant energy-saving effects.

[0053] It can be understood that the above working process can also be: the first lifting drum 10 is powered on, and the second lifting drum 20 is not powered on, and the energy saving effect obtained is the same.

[0054] Specifically, Figure 2 The suspension device shown in FIG. 1 is installed on the lifting container to make the lifting container more balanced during the lifting process.

[0055] In order to better understand the above situation where the weight of the lifting container and most of the lifting ropes are offset by linking the two lifting drums, the following example can be used for reference. Figure 4 Assume that the mass of the lifting container is m = 40t, the mass of the lifting material is m1 = 40t; the mass per unit length of the lifting rope is ρ = 10kg / m; the maximum lifting height is L = 1500m; the gravity acceleration g is 9.8m / s 2 , a complete lowering and lifting time cycle is 2T. When the lifting drum works alone and is not linked through the linkage middleware, the minimum lifting load of the elevator is (m+m1)g, and the maximum lifting load is (m+m1)g+2ρgL; when the two lifting drums are linked by the linkage middleware, the mass of the two lifting containers is balanced, and the minimum lifting load during operation is m1g, and the maximum is m1g+2ρgL. The calculation results show that when not linked, the minimum load on a single lifting drum is 784kN, and when the linkage middleware is linked, the maximum load on the entire lifting system is 686kN, that is, when linked, the maximum load on the entire system is even less than the minimum lifting load on a single lifting drum when not linked.

[0056] Furthermore, the ultra-deep well double-drum linkage winding hoisting system can have two working states when working. One is that one of the hoisting drums rotates actively and the other is linked to rotate, that is, one hoisting drum is powered on and the other hoisting drum is not powered on, but is in a power-on standby state, and can enter the working state at any time, or one is the main use and the other is the hot standby. The other state is that both hoisting drums rotate actively, that is, both hoisting drums are powered on, that is, both are the main use, and the two working states can be switched at any time. If the hoisting drum that is being powered on fails, its power supply can be cut off and switched to hot standby, and the other hot standby hoisting drum can be connected to generate torque and switched to the main use. In this way, it is ensured that the hoisting system will not stop working due to the failure of one of the hoisting drums, making the hoisting system more efficient.

[0057] Here, hot standby is a technical term corresponding to cold standby, which means that when the target device fails or shuts down, the hot standby device immediately takes over the work tasks of the failed device. Cold standby means that when the target device fails or shuts down, the cold standby device starts to enter the startup operation state from the downtime waiting state and takes over the work tasks of the failed device.

[0058] In addition, after the two lifting drums have been running for a long time, the positions of the two lifting containers may not match. For example, when one lifting container reaches the loading point, the other lifting container may not have reached the unloading point. The ropes of the two lifting containers can be adjusted separately by adjusting the position of the linkage middle piece. At this time, the lifting machine is braked by the braking device to stop its operation. The hydraulic station 90 supplies oil to the hydraulic cylinder, pushing the piston rod to move the support seat on the guide rail, thereby driving the linkage middle piece to disengage from the engagement with the lifting drum. Then start the two lifting drums again and adjust their respective lifting containers to the specified position. Finally, use the hydraulic cylinder again to push the linkage middle piece back to the previous linkage position. In this way, the rope adjustment of the two lifting drums can be achieved extremely conveniently and quickly.

[0059] The ultra-deep well double-drum linkage winding hoisting system of this embodiment can achieve low-frequency and smooth starting of the hoisting system because the hoisting drum is driven by a permanent magnet motor. During startup, the torque is large, the power is small, and the torque is stable, which ensures the smooth and reliable starting of the hoist under heavy load, solves the problem of low torque of asynchronous motors at startup and relying on overload to start, and avoids the phenomenon of "big horse pulling a small cart" caused by often choosing a high-power motor starting method when starting asynchronous motors.

[0060] For a better understanding, the following examples are given. For example, assuming that the hoisting height of a mine is 1200m, the hoisting containers are connected by two hoisting ropes, the unit mass of the hoisting rope is 6.8kg / m, the hoisting speed is 3m / s, the mass of the hoisting container is 30t, and the drum diameter is 5m. Assuming that the hoisting materials are 10t, 20t, 30t, and 40t respectively, the power required to start the ultra-deep well double-drum linkage winding hoisting system in the embodiment of the present invention and the ordinary non-linked asynchronous motor hoisting system are calculated respectively, and the speed of the asynchronous motor is 348r / min.

[0061] Starting power of non-linked asynchronous motor:

[0062]

[0063] Among them, c is the influencing factor of asynchronous motor current, and its value is 2; Ne is the speed of asynchronous motor; Md is the drag torque of motor; i is the transmission ratio of reducer; D is the diameter of drum; F is the maximum static tension of lifting rope end; η is transmission efficiency, and its value is 0.92; the value of coefficient in the formula can be found through the standards of motor design.

[0064] Starting power of ultra-deep well double drum linkage winding lifting system:

[0065]

[0066] Among them, c is the influencing factor of the low-frequency starting current of the permanent magnet motor, 1.6; k is the motor redundancy coefficient, 1.1; η is the transmission efficiency, which is 1 for the permanent magnet motor; V is the lifting speed; ρ is the influencing coefficient of the heat generation during motor acceleration and deceleration, which is 1; similarly, the values ​​of the coefficients in the formula can be found through the standards for motor design.

[0067] By calculating with formula (1) and (2) and comparing the starting power, the data in Table 1 below are obtained, which fully demonstrates that the starting power of the ultra-deep well double-drum linkage winding hoisting system in the embodiment of the present invention is smaller and the starting is smoother. Specifically, the hoisting rope is a steel wire rope.

[0068]

[0069] Furthermore, the entire lifting process can be monitored in the control device 50, which is connected to the power supply device 40, the hydraulic station 90 and the host computer 501. The control device 50 has the functions of monitoring and recording the working status and real-time operation data of the entire lifting system, generating, storing and printing system reports, and configuring the power supply system. The configuration includes: high-voltage power distribution system, low-voltage power distribution system, etc. The control device 50 is equipped with a monitor, which can display: the gate system, the shaft switch status, the rotation speed of the lifting drum, the lifting container position, the motor current, the dynamic curve, etc.

[0070] Furthermore, a frequency conversion component is arranged next to the power supply device 40, and when the motor is started, the frequency is reduced and the motor is started at a low speed. The starting power of the ultra-deep well double-drum linkage winding lifting system of this embodiment is also much smaller than the starting power of the lifting system of an ordinary asynchronous motor.

[0071] The hydraulic station 90 is used to provide hydraulic power to the hydraulic cylinder 304 .

[0072] In the description of the embodiments of the present invention, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection or a connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0073] The terms "first\second\third" involved in the embodiments of the present invention are only used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence if permitted.

[0074] It should be understood that "one embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present invention, the size of the serial number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The serial numbers of the above-mentioned embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-drum linkage winding lifting system, characterized in that: The system comprises a first lifting drum and a second lifting drum, wherein the first lifting drum and the second lifting drum are linked via a linkage intermediate piece; a first lifting rope is wound around the first lifting drum, and a second lifting rope is wound around the second lifting drum, and the first lifting rope and the second lifting rope are not connected to each other; The axial ends of the first lifting roller and the second lifting roller are aligned and linked by the linkage middle piece; the linkage middle piece is movably installed at a linkage position between the first lifting roller and the second lifting roller; when the linkage middle piece moves out of the linkage position, the first lifting roller and the second lifting roller are disengaged from the linkage; The linkage intermediate member includes a gear set, which is composed of one or more cylindrical gears; the first lifting drum is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of its circumference, and the second lifting drum is provided with teeth meshing with the cylindrical gear in the gear set on at least one end of its circumference; The linkage linear speeds of the first lifting roller, the linkage intermediate member and the second lifting roller are consistent; The linkage middle piece includes a linkage base, which is installed on a guide rail. A hydraulic cylinder is provided on the outer side of the guide rail. The piston rod of the hydraulic cylinder is connected to the linkage base so that the translation of the linkage middle piece releases the linkage between the first lifting roller and the second lifting roller.

2. The double-drum linkage winding lifting system according to claim 1 is characterized in that: The gear set includes two mutually meshing cylindrical gears at least at one end corresponding to the first lifting roller and the second lifting roller, and the opposite sides of the two cylindrical gears are meshed with each other, and the other sides are respectively meshed with the first lifting roller and the second lifting roller.

3. The double-drum linkage winding lifting system according to claim 2 is characterized in that: The first lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof, and the second lifting roller is provided with teeth meshing with the cylindrical gears in the gear set on the circumference of both ends thereof; the gear set includes two mutually meshing cylindrical gears at both ends of the first lifting roller and the second lifting roller, and the opposite sides of the cylindrical gears at the same end are meshed with each other, and the other sides are respectively meshed with the first lifting roller and the second lifting roller.

4. The double-drum linkage winding lifting system according to claim 3 is characterized in that: The first lifting roller and the second lifting roller both include an outer rotor permanent magnet motor, and the outer shell of the rotor of the outer rotor permanent magnet motor is the roller of the first lifting roller or the second lifting roller.

5. The double-drum linkage winding lifting system according to claim 4 is characterized in that: The system also includes a power supply device that can control the outer rotor permanent magnet motor of the first lifting drum and the outer rotor permanent magnet motor of the second lifting drum respectively, and the power supply device is electrically connected to the outer rotor permanent magnet motor of the first lifting drum and the outer rotor permanent magnet motor of the second lifting drum respectively.

6. The double-drum linkage winding lifting system according to claim 5 is characterized in that: The system also includes a control device for controlling the operation of the system and a position monitoring device for monitoring the position of the lifting container; the control device is installed in a ground machine room, and the position monitoring device is installed on a derrick; the control device is electrically connected to the power supply device and the position monitoring device.

7. The double-drum linkage winding lifting system according to claim 6 is characterized in that: The system further comprises an overwinding protection device, which is installed on the derrick and electrically connected to the control device.

8. The double-drum linkage winding lifting system according to claim 7 is characterized in that: The system further comprises a braking device, which is installed on one side of the first lifting drum and / or the second lifting drum.

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