Fixed-torque automatic turning gear

Abstract

The utility model provides a fixed torque automatic turning gear, which belongs to the technical field of oil and gas production equipment and comprises a torque motor, a safety clutch device and an automatic control system, the torque motor is connected with equipment to be turned through the safety clutch device and drives the equipment to be turned to perform turning action; the automatic control system is in communication connection with the torque motor, the torque motor transmits the torque for driving the to-be-turned device to perform turning action to the automatic control system in real time, and the automatic control system judges whether the to-be-turned device is jammed or not according to the torque fed back by the torque motor and controls the torque motor and the safety clutch device to act, so that automatic turning can be realized. And when the turning operation is completed, safe disconnection can be realized, so that the operation risk is reduced, and the timeliness of the turning operation is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas production equipment, and in particular relates to a constant torque automatic turning device. Background Art

[0002] Compressor units are necessary equipment for shale gas development. By the end of 2023, 42 compressor units have been built and put into operation in the Changning shale gas block. In view of the characteristics of shale gas development and production, the compressor units used for platform boosting and centralized boosting are all electric-driven reciprocating compressor units. Since shale gas wells have the characteristics of fast decline and long stable production period, and low pressure and low production in the later stage of single wells, the boosting process is an indispensable and decisive process measure for shale gas development and production. Therefore, the development of shale gas is inseparable from compressor units, and with the rapid production of shale gas in southern Sichuan, the number of compressor units put into use will increase rapidly.

[0003] Cranking operation is a necessary step to ensure the safety of reciprocating compressor units. Reciprocating compressors need to be cranked before starting and after abnormal shutdown. The main function is to confirm that there is no obstruction in the moving parts and that there is no damage to the unit due to high temperature or inadequate lubrication of the friction pair after shutdown. The current cranking method is to manually insert a cranking rod into the cranking hole of the unit's flywheel and crank it 2-4 times. The operator needs to have a certain physical strength, especially large compressor units, which require higher physical strength for the cranking operator, and there are greater safety risks such as collisions, smashes, and mechanical injuries during the cranking process.

[0004] The cranking device is a necessary measure to ensure operational safety and simplify operating procedures. At present, the power supply used for electric compressors in shale gas blocks is 10KV high-voltage power supply. In order to ensure the safety of cranking operation, the motor power supply must be physically disconnected before cranking to prevent abnormal startup of the motor during cranking, causing personal injury and equipment damage. According to the power operation and safety management regulations, the isolation of high-voltage electricity requires certified operation, and in the event of abnormal shutdown, cranking must be performed as soon as possible to minimize the damage to the unit. However, under the current oil company model, there is a certain contradiction between the configuration of high-voltage electricians and the transformation of unmanned stations, and the timeliness of cranking cannot be guaranteed. However, the electric cranking device can avoid the physical isolation step of the high-voltage power supply during cranking.

[0005] The cranking device is a necessary condition to reduce the human resource demand of the booster station. The booster stations in the southern Sichuan shale gas block are all designed according to the unmanned concept, and with the advancement of the oil company model, unmanned operation is the development direction of shale gas booster stations. However, the cranking operation of the electric reciprocating compressor units used in the southern Sichuan shale gas block must be completed manually, especially after the abnormal shutdown of the unit, the unit needs to be cranked in time. In the case of unmanned operation, a special person needs to rush to the site to operate, which has certain constraints on limited human resources. After the installation of the cranking device, it will be realized that only personnel need to go to the site to confirm that there are no abnormal conditions such as abnormal noise and leakage before the unit is started, and only remote cranking is required after abnormal shutdown.

[0006] For example, in the Chinese patent literature, the publication number is CN211144807U, the publication date is July 31, 2020, and the name is a utility model patent for a winching system device arranged on the compressor unit coupling, including a winching system body, a motor side protective cover body, an intermediate expansion joint, a compressor side protective cover body and a winching gear arranged on the motor half coupling, the intermediate expansion joint is arranged between the compressor side protective cover body and the motor side protective cover body, and its two ends are respectively connected to the compressor side protective cover body and the motor side protective cover body; the winching system body is transmission connected to the motor half coupling through the winching gear; the motor side protective cover body includes a first upper cover body and a first lower cover body connected together to form a protective cover body, the winching system body shell is connected to the first lower cover body, and the connecting surface of the first upper cover body and the first lower cover body passes through the axis of the motor half coupling and forms an angle with the horizontal plane, which can realize automatic winching operation without manual winching, but there is still a deficiency. It is not possible to accurately judge whether there is any obstruction during the winching operation.

[0007] In summary, according to the above-mentioned prior art, manual turning or electric turning devices that cannot accurately determine whether there is an obstruction or not are generally used. Utility Model Content

[0008] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a fixed torque automatic cranking device. The cranking device has a simple structure and can realize automatic cranking. During the cranking process, it can determine whether there is jamming according to the torque. After the cranking operation is completed, it can be safely disconnected, thereby reducing operational risks and ensuring the timeliness of the cranking operation.

[0009] The utility model is realized by the following technical solutions:

[0010] A fixed-torque automatic cranking device, characterized in that it includes a torque motor, a safety clutch device and an automatic control system, wherein the torque motor is connected to the device to be cranked through the safety clutch device, and drives the device to be cranked to perform a cranking action; the automatic control system is communicatively connected with the torque motor, and the torque motor transmits the torque used to drive the device to be cranked to perform a cranking action to the automatic control system in real time, and the automatic control system determines whether the device to be cranked is stuck according to the torque fed back by the torque motor and controls the actions of the torque motor and the safety clutch device.

[0011] Furthermore, it also includes a remote control system, which is communicatively connected with the automatic control system.

[0012] Furthermore, the waiting-for-turning device comprises a driven device and a main motor, and the input shaft of the driven device is connected to the main shaft of the main motor through a coupling.

[0013] Furthermore, the driven device is a compressor or a pump.

[0014] Furthermore, the safety clutch device includes a clutch gear member and a flywheel ring gear meshing with the clutch gear member, the clutch gear member is assembled on the output shaft of the torque motor, and the flywheel ring gear is assembled on the coupling.

[0015] Furthermore, the safety clutch device adopts a one-way bearing, the one-way bearing is connected to the coupling, and the output end of the torque motor is connected to the one-way bearing.

[0016] Furthermore, the safety clutch device includes an electromagnetic clutch, and a spline groove is provided at the tail end of the main motor main shaft for connecting one end of the electromagnetic clutch, and the other end of the electromagnetic clutch is connected to the torque motor.

[0017] Furthermore, the torque motor and the safety clutch device are integrated into an integrated clutch torque motor.

[0018] Furthermore, a spline groove is provided at the end of the main shaft of the main motor, and the spline groove is used to connect the clutch torque motor.

[0019] Furthermore, the torque motor is a rare earth permanent magnet brushless DC torque motor.

[0020] The working principle of the utility model is as follows:

[0021] The torque motor is connected to the main shaft through the safety clutch device, and then the remote control system gives the operation instruction. The automatic control system receives the instruction to start the torque motor, and the torque motor drives the equipment to be turned to complete the turning. During the turning process, the torque motor sets the blocking (stuck) torque, and automatically identifies whether there is a jam based on the torque value comparison. If the torque exceeds the set torque, the torque signal is fed back to the automatic control system during the turning process. The automatic control system automatically controls the torque motor to stop turning. After the turning is completed or the torque of the torque motor exceeds the set torque, the safety clutch device safely disconnects the torque motor and the equipment to be turned. The automatic control system receives the signal of the torque motor and feeds back to the remote control system. The remote control system receives the feedback of the automatic control system and gives instructions to the control system, and the control system starts and stops the torque motor.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1. In the utility model, the winching device has a simple structure and can realize automatic winching without anyone on duty. During the winching process, it can determine whether there is a jam according to the torque. After the winching operation is completed, it can be safely disconnected, thereby reducing operational risks, ensuring the timeliness of the winching operation, and reducing labor costs.

[0024] 2. In the utility model, the torque motor integrated safety clutch device is an integrated clutch torque motor. The safety clutch device and the torque motor are integrated into an integrated setting, which combines the functions of the safety clutch device and the torque motor, reduces the power loss caused by the independent connection of the safety clutch device and the torque motor, can better coordinate the clutch and control torque, achieve higher control accuracy and stability, can quickly respond to control signals, and achieve fast starting, stopping and torque control.

[0025] 3. In the utility model, a clutch gear is mounted on the output shaft of the torque motor, and a flywheel gear ring is mounted on the coupling head. Accurate power transmission is achieved through the meshing of the flywheel gear ring and the clutch gear, ensuring accurate transmission of torque and speed, and being able to quickly engage and disengage. In the event of an overload, the clutch gear can automatically disengage to protect the turning device from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0027] Figure 2 It is a structural schematic diagram of another embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of another embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of another embodiment of the utility model.

[0030] Figure numerals: 1-driven device, 2-main motor, 3-torque motor, 4-automatic control system, 5-remote control system, 6-clutch gear, 7-flywheel ring gear, 8-one-way bearing, 9-electromagnetic clutch. DETAILED DESCRIPTION

[0031] 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 of 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.

[0032] Example 1

[0033] A fixed-torque automatic cranking device comprises a torque motor 3, a safety clutch device and an automatic control system 4. The torque motor 3 is connected to a device to be cranked via the safety clutch device, and drives the device to be cranked to perform a cranking action. The automatic control system 4 is communicatively connected to the torque motor 3, and the torque motor 3 transmits the torque used to drive the cranking device to perform a cranking action to the automatic control system 4 in real time. The automatic control system 4 determines whether the device to be cranked is stuck according to the torque fed back by the torque motor 3, and controls the actions of the torque motor 3 and the safety clutch device.

[0034] The fixed torque automatic cranking device further comprises a remote control system 5 , and the remote control system 5 is communicatively connected with the automatic control system 4 .

[0035] During implementation, after an abnormal shutdown, the equipment to be turned needs to be turned in time. In the case of no one on duty, a special person needs to rush to the site to install the turning device. After the turning device is installed, it is only necessary to confirm on site that there are no abnormal conditions such as abnormal noise and leakage, and then the remote control system 5 gives an operation instruction. The automatic control system 4 receives the instruction to start the torque motor 3, and the torque motor 3 drives the equipment to be turned to rotate to complete the turning. During the turning process, the torque motor 3 sets a blocking (blocking) torque, and automatically identifies whether there is a blocking according to the torque value comparison. If the setting torque is exceeded, the torque signal is fed back to the automatic control system 4 during the turning process. The automatic control system 4 automatically controls the torque motor 3 to stop turning. The safety clutch device safely disconnects the torque motor 3 and the equipment to be turned after the turning is completed or the torque of the torque motor 3 exceeds the set torque. The automatic control system 4 receives the signal of the torque motor 3 and feeds it back to the remote control system 5. The remote control system 5 receives the feedback of the automatic control system 4 and gives an instruction to the control system, and the control system starts and stops the torque motor 3.

[0036] In this embodiment, the automatic control system 4 and the remote control system 5 are both existing structural components, and any components that can realize the functions of the automatic control system 4 and the remote control system 5 in this embodiment can be used.

[0037] Example 2

[0038] This embodiment further elaborates and supplements the implementation method of the utility model on the basis of Embodiment 1.

[0039] like Figure 1-4 As shown, the device to be turned includes a driven device 1 and a main motor 2. The input shaft of the driven device 1 is connected to the main shaft of the main motor 2 through a coupling. In this embodiment, the driven device 1 is a compressor or a pump device.

[0040] Example 3

[0041] This embodiment further elaborates and supplements the implementation method of the utility model on the basis of Embodiment 2.

[0042] As an implementation method of this embodiment, Figure 1 As shown, the safety clutch device includes a clutch gear member 6 and a flywheel ring gear 7 meshing with the clutch gear member 6, the clutch gear member 6 is mounted on the output shaft of the torque motor 3, and the flywheel ring gear 7 is mounted on the coupling. Accurate power transmission is achieved through the meshing of the flywheel ring gear 7 and the clutch gear member 6, ensuring accurate transmission of torque and speed, and can quickly engage and disengage, and can automatically disengage in overload conditions to protect the turning device from damage.

[0043] As another implementation method of this embodiment, Figure 4 As shown, the safety clutch device adopts a one-way bearing 8 , the one-way bearing 8 is connected to a coupling, and the output end of the torque motor 3 is connected to the one-way bearing 8 .

[0044] As another implementation method of this embodiment, Figure 3 As shown, the safety clutch device includes an electromagnetic clutch 9. A spline groove is provided at the tail end of the main shaft of the main motor 2 for connecting one end of the electromagnetic clutch 9. The other end of the electromagnetic clutch 9 is connected to the torque motor 3. The electromagnetic clutch 9 integrates a braking function, which can quickly brake when the transmission is disconnected to stop the operation of the torque motor 3.

[0045] In this embodiment, the torque motor 3 adopts a rare earth permanent magnet brushless DC torque motor 3, which can achieve short distance, large diameter, constant torque (locked-rotor torque), low speed, etc., and is suitable for various compressors and pump equipment.

[0046] Example 4

[0047] This embodiment further elaborates and supplements the implementation method of the utility model on the basis of Embodiment 2.

[0048] The torque motor 3 and the safety clutch device are integrated into an integrated clutch torque motor, which combines the functions of the safety clutch device and the torque motor 3, reduces the power loss caused by the independent connection of the safety clutch device and the torque motor 3, can better coordinate the clutch and control torque, achieve higher control accuracy and stability, and can quickly respond to control signals to achieve rapid start, stop and torque control. When the turning operation is completed or the torque exceeds the torque set by the automatic control system 4, the automatic control system 4 sends a signal that can quickly respond to the control signal, stop the turning, and ensure that the turning device is not damaged.

[0049] As an example, Figure 2 As shown, a spline groove is provided at the end of the main shaft of the main motor 2, and the spline groove is used to connect the clutch torque motor, which can better coordinate the clutch and control the torque, achieve higher control accuracy and stability, and can quickly respond to the control signal to achieve fast start, stop and torque control. When the turning operation is completed or the torque exceeds the torque set by the automatic control system 4, the automatic control system 4 sends a signal to quickly respond to the control signal, stop the turning, and ensure that the turning device is not damaged.

Claims

1. Constant torque automatic turning device, characterized by: The invention comprises a torque motor (3), a safety clutch device and an automatic control system (4), wherein the torque motor (3) is connected to a waiting-to-crank device via the safety clutch device and drives the waiting-to-crank device to perform a cranking action; the automatic control system (4) is in communication connection with the torque motor (3), the torque motor (3) transmits the torque used to drive the waiting-to-crank device to perform a cranking action to the automatic control system (4) in real time, and the automatic control system (4) determines whether the waiting-to-crank device is blocked based on the torque fed back by the torque motor (3) and controls the actions of the torque motor (3) and the safety clutch device.

2. The constant torque automatic turning device according to claim 1, characterized in that: It also includes a remote control system (5), wherein the remote control system (5) is communicatively connected to the automatic control system (4).

3. The constant torque automatic turning device according to claim 1 or 2, characterized in that: The waiting-for-cranking device comprises a driven device (1) and a main motor (2), wherein the input shaft of the driven device (1) is connected to the main shaft of the main motor (2) via a coupling.

4. The constant torque automatic turning device according to claim 3, characterized in that: The driven device (1) is a compressor or a pump.

5. The constant torque automatic turning device according to claim 4, characterized in that: The safety clutch device comprises a clutch gear member (6) and a flywheel gear ring (7) meshing with the clutch gear member (6); the clutch gear member (6) is mounted on an output shaft of the torque motor (3); and the flywheel gear ring (7) is mounted on a coupling.

6. The constant torque automatic turning device according to claim 4, characterized in that: The safety clutch device adopts a one-way bearing (8), the one-way bearing (8) is connected to the coupling, and the output end of the torque motor (3) is connected to the one-way bearing (8).

7. The constant torque automatic turning device according to claim 4, characterized in that: The safety clutch device comprises an electromagnetic clutch (9), a spline groove is provided at the rear end of the main shaft of the main motor (2) for connecting one end of the electromagnetic clutch (9), and the other end of the electromagnetic clutch (9) is connected to the torque motor (3).

8. The constant torque automatic turning device according to claim 4, characterized in that: The torque motor (3) and the safety clutch device are integrated into an integrated clutch torque motor.

9. The constant torque automatic turning device according to claim 8, characterized in that: A spline groove is provided at the end of the main shaft of the main motor (2), and the spline groove is used for connecting to a clutch torque motor.

10. The constant torque automatic turning device according to claim 4, characterized in that: The torque motor (3) is a rare earth permanent magnet brushless DC torque motor.

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