Balance control device for buffer oil cylinder of derrick

Abstract

The invention relates to the technical field of well drilling construction, in particular to a derrick buffer oil cylinder balance control device which comprises an oil pump, a first oil way, a second oil way, a first oil cylinder, a second oil cylinder, an oil way distributor, a first electromagnetic pressure regulating overflow valve and a second electromagnetic pressure regulating overflow valve. An oil outlet of the first electromagnetic pressure regulating overflow valve is connected with an oil outlet of the second electromagnetic pressure regulating overflow valve through a synchronous oil way, a synchronous electromagnetic valve is arranged on the synchronous oil way, the synchronous oil way is provided with an oil return branch, an electromagnetic throttling valve is arranged on the oil return branch, and the oil return end of the oil return branch is connected with the oil way distributor. According to the hydraulic system, the synchronous oil way and the oil return branch are adopted for connection, independent control and synchronous control of the first oil cylinder and the second oil cylinder can be achieved, and synchronous and stable falling of the first oil cylinder and the second oil cylinder can be achieved under some conditions.

Description

Technical Field

[0001] The invention relates to the technical field of drilling construction, and in particular to a derrick buffer cylinder balance control device. Background Art

[0002] Raising and lowering the derrick is a regular operation in drilling construction, and it is also the focus of equipment safety protection. However, many problems have arisen in the operation of raising the derrick. For example, a drilling company had a derrick collapse accident due to improper operation during the derrick raising process, which caused serious economic losses and had a negative impact on the reputation of the drilling company. The main reason for the accident was that the operation of the buffer cylinder was not synchronized with the driller's lifting operation. When the driller was operating, the traveling block was lifted too fast and the tonnage was too high. When the buffer cylinder was recovered too slowly or the two sides were not synchronized, the derrick would be pulled down; if it was recovered too quickly, the derrick would impact the buffer cylinder and the fixed seat and break, which would also cause a major safety accident. Therefore, keeping the left and right balance of the cylinder appropriate and the recovery speed synchronized with the lifting is the key to ensuring the safety of the derrick.

[0003] When applying for the present invention, the applicant found through search that a Chinese patent disclosed "a drilling rig derrick lifting and lowering buffer control device and its use method", and its application number is "201510672742.3". This patent mainly uses one control handle to control the coordinated action of two buffer hydraulic cylinders, and has buffering function, balancing function and speed regulation function; specifically, the right position of the three-position reversing valve is used to synchronously control the two buffer hydraulic cylinders for simultaneous use. In this way, the two buffer hydraulic cylinders cannot be used separately, and the actual use effect is not good. The coordination operability of the two buffer hydraulic cylinders is poor. For this reason, the present invention provides a derrick buffer oil cylinder balance control device. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a derrick buffer cylinder balance control device.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a derrick buffer cylinder balance control device, comprising an oil pump, a first oil circuit, a second oil circuit, a first oil cylinder, and a second oil cylinder, wherein the oil pump is connected to an oil circuit distributor through a main oil supply circuit and a main oil return circuit, and the oil circuit distributor is provided with two sets of independent oil supply interfaces and oil return interfaces, wherein one set of the oil supply interfaces and the oil return interfaces are connected to the first oil cylinder through the first oil circuit, and the other set of the oil supply interfaces and the oil return interfaces are connected to the second oil cylinder through the second oil circuit; A first electromagnetic pressure-regulating overflow valve is arranged on the return oil circuit of the first oil circuit, a second electromagnetic pressure-regulating overflow valve is arranged on the return oil circuit of the second oil circuit, and the oil outlet of the first electromagnetic pressure-regulating overflow valve is connected with the oil outlet of the second electromagnetic pressure-regulating overflow valve through a synchronous oil circuit, a synchronous solenoid valve is arranged on the synchronous oil circuit, the synchronous oil circuit is connected to the oil circuit distributor through an oil return branch, and an electromagnetic throttle valve is arranged on the oil return branch.

[0006] As a further description of the above technical solution: It also includes: a 220V AC circuit system and a 24V DC circuit system. The oil pump is powered by the 220V AC circuit system. An AC relay is provided in the circuit where the oil pump is located. The 24V DC circuit system includes a 24V switching power supply and an oil pump circuit, an alarm circuit, a cylinder circuit, a throttling circuit, a synchronization circuit, a pressure relief circuit, and a pressure gauge circuit connected in parallel with the 24V switching power supply circuit. The oil pump circuit is provided with an oil pump switch and an AC relay. The alarm circuit is provided with an alarm switch and an alarm. The cylinder circuit is provided with an oil circuit distributor and a cylinder circuit switch. The throttling circuit is provided with a throttle valve control switch and an electromagnetic throttle valve. The synchronization circuit is provided with a synchronization electromagnetic valve and a synchronization circuit switch. The pressure relief circuit is provided with a pressure relief circuit switch and a first electromagnetic pressure regulating overflow valve and a second electromagnetic pressure regulating overflow valve arranged in parallel. The pressure gauge circuit is provided with a first pressure display and a second pressure display connected in parallel.

[0007] As a further description of the above technical solution: An alarm probe is arranged on the shell of the second oil cylinder, and the alarm probe is connected with an alarm switch and an alarm.

[0008] As a further description of the above technical solution: A first pressure sensor is arranged on the oil return line of the first oil circuit, and the first pressure display is used to display the detection data of the first pressure sensor. A second pressure sensor is arranged on the oil return line of the second oil circuit, and the second pressure display is used to display the detection data of the second pressure sensor.

[0009] As a further description of the above technical solution: The oil circuit distributor includes a first solenoid valve and a second solenoid valve, the cylinder circuit includes a first cylinder circuit and a second cylinder circuit arranged in parallel, the cylinder circuit switch includes a left cylinder circuit switch and a right cylinder circuit switch, the first cylinder circuit is provided with a first solenoid valve and a left cylinder circuit switch, and the second cylinder circuit is provided with a second solenoid valve and a right cylinder circuit switch.

[0010] As a further description of the above technical solution: A charging circuit is provided between the 24V switching power supply and the 220V AC circuit system.

[0011] As a further description of the above technical solution: It also includes: a control panel, on which are provided a left cylinder circuit switch, a right cylinder circuit switch, a throttle valve control switch, a synchronization circuit switch, a pressure relief circuit switch, a power switch, an oil pump switch, an emergency stop switch and an alarm switch, the left cylinder circuit switch is used to control the first solenoid valve, the right cylinder circuit switch is used to control the second solenoid valve, the throttle valve control switch is used to control the solenoid throttle valve, the synchronization circuit switch is used to control the synchronization solenoid valve, the pressure relief circuit switch is used to control the first solenoid pressure regulating overflow valve and the second solenoid pressure regulating overflow valve in the pressure relief circuit, the power switch and the emergency stop switch are both used to control a 24V switching power supply, and the power switch and the emergency stop switch are connected in series, and the alarm switch is used to energize the alarm.

[0012] The present invention has the following beneficial effects: Compared with the prior art, the derrick buffer oil cylinder balance control device adopts a synchronous solenoid valve and an electromagnetic throttle valve to perform parallel pressure relief flow control to ensure that the pressures at the oil outlet ends of the first oil cylinder and the second oil cylinder are the same, and the left and right oil cylinders are subjected to the same force, thereby solving the problem that the left and right oil cylinders are subjected to different forces and work asynchronously when the derrick is in place during the derrick raising process; the two oil cylinder propulsion oil circuits are separately controlled in parallel, and the oil circuit distributors designed for the two pipelines can connect the pipelines, so that the pressures of the two oil cylinders can be balanced when needed; the two oil cylinders need to be pushed forward synchronously when the derrick is lowered, and the two pipelines work synchronously in series at this time, and can also work separately when the two sides of the derrick are unbalanced to adjust the derrick angle; the two oil cylinders buffer when the derrick is in place, and the two oil cylinders adopt a series throttling recovery at this time to ensure that the two cylinders are subjected to uniform force, synchronous speed and uniform speed, thereby avoiding the phenomenon of derrick distortion caused by different forces on the two cylinders when the derrick is raised. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the oil circuit principle of a derrick buffer cylinder balance control device proposed by the present invention; Figure 2 A schematic diagram of the circuit principle of a derrick buffer cylinder balance control device proposed by the present invention; Figure 3 This is a schematic diagram of a control panel of a derrick buffer cylinder balance control device proposed by the present invention.

[0014] Legend: 1. Left cylinder circuit switch; 2. Right cylinder circuit switch; 3. Throttle valve control switch; 4. Synchronous circuit switch; 5. Pressure relief circuit switch; 6. Power switch; 7. Oil pump switch; 8. Emergency stop switch; 9. Alarm switch; 10. First oil circuit; 11. Second oil circuit; 12. Synchronous oil circuit; 13. Oil return branch; 14. First pressure sensor; 15. First electromagnetic pressure regulating overflow valve; 16. Second electromagnetic pressure regulating overflow valve; 17. Second pressure sensor; 18. Oil circuit distributor; 181. First electromagnetic valve; 182. Second electromagnetic valve; 19. Main oil supply circuit; 20. Main oil return circuit; 21. Electromagnetic throttle valve; 22. Alarm probe; 23. Synchronous electromagnetic valve; 24. Oil pump; 25. AC relay; 26. 24V switching power supply; 27. Alarm; 28. First pressure display; 29. ​​Second pressure display. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Reference Figure 1-3 The present invention provides a derrick buffer cylinder balance control device, comprising an oil pump 24, a first oil circuit 10, a second oil circuit 11, a first oil cylinder, and a second oil cylinder. The oil pump 24 is connected to an oil circuit distributor 18 through a main oil supply circuit 19 and a main oil return circuit 20. The oil circuit distributor 18 is provided with two sets of independent oil supply interfaces and oil return interfaces, one set of which is connected to the first oil cylinder through the first oil circuit 10, and the other set of which is connected to the second oil cylinder through the second oil circuit 11; The oil pump 24 works to form a high-pressure state at the main oil supply circuit 19. The user controls the two independent control valves on the oil circuit distributor 18 to manipulate the connection or disconnection of the two independent oil supply interfaces and oil return interfaces, thereby supplying oil to the first oil circuit 10 and the second oil circuit 11 separately, so as to achieve the purpose of separately manipulating the first oil cylinder and the second oil cylinder. Specifically, when the two sides of the derrick are unbalanced, they work separately to adjust the derrick angle.

[0017] A first electromagnetic pressure-regulating relief valve 15 is provided on the return oil line of the first oil circuit 10, a second electromagnetic pressure-regulating relief valve 16 is provided on the return oil line of the second oil circuit 11, and the oil outlet of the first electromagnetic pressure-regulating relief valve 15 is connected with the oil outlet of the second electromagnetic pressure-regulating relief valve 16 through a synchronous oil circuit 12, a synchronous solenoid valve 23 is provided on the synchronous oil circuit 12, the synchronous oil circuit 12 is connected to the oil circuit distributor 18 through the return oil branch 13, and an electromagnetic throttle valve 21 is provided on the return oil branch 13.

[0018] The first electromagnetic pressure-regulating relief valve 15 and the second electromagnetic pressure-regulating relief valve 16 are actually composed of a pilot relief valve and a solenoid valve. For example, when the circuit where the first electromagnetic pressure-regulating relief valve 15 is located is not energized, its function is equivalent to a relief valve, maintaining the pressure of the return oil circuit of the first oil circuit 10 so that it has a stable oil pressure and the first oil cylinder moves smoothly. When its solenoid valve is working, it is connected to the synchronous oil circuit 12, and cooperates with the solenoid valve in the second electromagnetic pressure-regulating relief valve 16 to work (the second electromagnetic pressure-regulating relief valve 16 works in the same way as the above-mentioned first electromagnetic pressure-regulating relief valve 15), and opens the synchronous solenoid valve 23 to connect the return oil circuits of the first oil circuit 10 and the second oil circuit 11, and synchronously flow back to the oil tank through the return oil branch 13. The electromagnetic throttle valve 21 arranged on the return oil branch 13 is used to control the flow rate of the return flow and control the speed of synchronous movement of the two oil cylinders.

[0019] Referring to the accompanying drawings, it also includes: a 220V AC circuit system and a 24V DC circuit system. The oil pump 24 is powered by the 220V AC circuit system. An AC relay 25 (herein, the main control end) is provided in the circuit where the oil pump 24 is located, which is used to control the on and off of the circuit where the oil pump 24 is located, and is used to start and shut down the operation of the oil pump 24; the 24V DC circuit system includes a 24V switching power supply 26 and an oil pump circuit, an alarm circuit, a cylinder circuit, a throttling circuit, a synchronization circuit, a pressure relief circuit, and a pressure gauge circuit connected in parallel with the 24V switching power supply 26 power supply circuit. An oil pump switch 7 and an AC relay 25 are provided in the oil pump circuit to realize weak current control of strong current ; The alarm circuit is provided with an alarm switch 9 and an alarm 27. When the alarm switch 9 is turned on, the alarm 27 will sound an alarm to indicate a fault or a dangerous accident; the cylinder circuit is provided with an oil circuit distributor 18 and an oil cylinder circuit switch for supplying power to the oil circuit distributor 18; the throttle circuit is provided with a throttle valve control switch 3 and an electromagnetic throttle valve 21, the synchronization circuit is provided with a synchronization solenoid valve 23 and a synchronization circuit switch 4, the pressure relief circuit is provided with a pressure relief circuit switch 5 and a first electromagnetic pressure regulating overflow valve 15 and a second electromagnetic pressure regulating overflow valve 16 arranged in parallel, and the pressure gauge circuit is provided with a first pressure display 28 and a second pressure display 29 connected in parallel.

[0020] Specifically, an alarm probe 22 is provided on the housing of the second oil cylinder, and the alarm probe 22 is electrically connected to the alarm switch 9 and the alarm 27 through the control module. When in use, the alarm probe 22 detects the distance between the derrick and the end of the oil cylinder, and the alarm probe 22 converts the distance between the derrick and the end of the oil cylinder into an electrical signal and sends it to the control module, which compares it with the preset distance. When the distance between the derrick and the end of the oil cylinder is less than the preset distance (for example, the initial preset distance is 20 cm), the control module sends a control signal to control the alarm switch 9 to close, and the alarm 27 sounds to remind the operator to slow down the lifting speed of the derrick to avoid collision due to excessive speed when the derrick is in place, thereby improving the protection of the derrick. (A corresponding alarm device can also be set at the first oil cylinder).

[0021] A first pressure sensor 14 is provided on the return oil line of the first oil circuit 10, and a first pressure display 28 is used to display the detection data of the first pressure sensor 14. A second pressure sensor 17 is provided on the return oil line of the second oil circuit 11, and a second pressure display 29 is used to display the detection data of the second pressure sensor 17. The first pressure sensor 14 and the second pressure sensor 17 are used to detect the pressures at the return oil lines of the first oil circuit 10 and the second oil circuit 11 respectively, and the first pressure display 28 and the second pressure display 29 are used to display the detection data.

[0022] The oil circuit distributor 18 includes a first solenoid valve 181 and a second solenoid valve 182, the cylinder circuit includes a first cylinder circuit and a second cylinder circuit arranged in parallel, the cylinder circuit switch includes a left cylinder circuit switch 1 and a right cylinder circuit switch 2, the first cylinder circuit is provided with a first solenoid valve 181 and a left cylinder circuit switch 1, the second cylinder circuit is provided with a second solenoid valve 182 and a right cylinder circuit switch 2, and the hydraulic oil in the first oil circuit 10 and the second oil circuit 11 is controlled by operating the first solenoid valve 181 and the second solenoid valve 182.

[0023] A charging circuit is provided between the 24V switching power supply 26 and the 220V AC circuit system, and the 220V AC circuit system is directly connected to the mains.

[0024] Referring to the accompanying drawings, it also includes: a control panel, on which are provided a left cylinder circuit switch 1, a right cylinder circuit switch 2, a throttle valve control switch 3, a synchronization circuit switch 4, a pressure relief circuit switch 5, a power switch 6, an oil pump switch 7, an emergency stop switch 8 and an alarm switch 9. The left cylinder circuit switch 1 is used to control the first solenoid valve 181, the right cylinder circuit switch 2 is used to control the second solenoid valve 182, the throttle valve control switch 3 is used to control the solenoid throttle valve 21, the synchronization circuit switch 4 is used to control the synchronization solenoid valve 23, the pressure relief circuit switch 5 is used to control the first electromagnetic pressure regulating overflow valve 15 and the second electromagnetic pressure regulating overflow valve 16 in the pressure relief circuit, the power switch 6 and the emergency stop switch 8 are both used to control the 24V switching power supply, and the power switch 6 and the emergency stop switch 8 are in series, and the alarm switch 9 is used to turn on or off the alarm 27.

[0025] Specifically, before lifting the derrick, turn on the power of the device, check the two cylinder oil pipelines (the first oil circuit 10 and the second oil circuit 11), turn on the power to operate the left cylinder key and the right cylinder control key to extend the cylinders L and R completely, adjust the electromagnetic throttle valve 21 to the minimum, open the first electromagnetic pressure regulating relief valve 15, the second electromagnetic pressure regulating relief valve 16, and the alarm switch 9.

[0026] When the derrick is normally lifted and contacts the buffer cylinder, the synchronous switch is operated to open the synchronous solenoid valve 23. As the derrick is pressed down, the pressure in the cylinder rises. Under the action of the first pressure sensor 14 and the second pressure sensor 17, the first pressure display 28 and the second pressure display 29 display the pressure data. Then, the electromagnetic throttle valve 21 is adjusted according to the pressure data displayed by the pressure display to maintain a suitable discharge flow so that the derrick can be lifted smoothly. When the gravity of the derrick acts on the cylinder, the cylinder is pressed to release pressure and recover (the cylinder is recovered to an extended length of about 20 cm). The derrick in place alarm probe 22 senses the alarm information, controls the alarm 27 to sound, and the driller stops lifting the traveling carriage (when the cylinder is recovered to an extended length of about 10 cm, the alarm system controls the traveling carriage to brake automatically). The derrick relies on its own gravity to press the hydraulic oil back into the cylinder to release pressure, and the derrick is lifted into place.

[0027] As the derrick is in place, the pressure indicator will increase and the recovery speed will increase. At this time, the derrick positioning speed can be controlled by adjusting the flow rate of the throttle valve control handle. The whole process should be no less than 60 seconds to ensure stability.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is 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 derrick buffer cylinder balance control device, comprising an oil pump (24), a first oil circuit (10), a second oil circuit (11), a first oil cylinder, and a second oil cylinder, characterized in that: The oil pump (24) is connected to the oil circuit distributor (18) via a main oil supply circuit (19) and a main oil return circuit (20); the oil circuit distributor (18) is provided with two sets of independent oil supply interfaces and oil return interfaces, one set of the oil supply interfaces and the oil return interface is connected to the first oil cylinder via a first oil circuit (10), and the other set of the oil supply interfaces and the oil return interface is connected to the second oil cylinder via a second oil circuit (11); A first electromagnetic pressure regulating relief valve (15) is provided on the oil return line of the first oil circuit (10), a second electromagnetic pressure regulating relief valve (16) is provided on the oil return line of the second oil circuit (11), and an oil outlet of the first electromagnetic pressure regulating relief valve (15) is connected to an oil outlet of the second electromagnetic pressure regulating relief valve (16) via a synchronous oil circuit (12), a synchronous electromagnetic valve (23) is provided on the synchronous oil circuit (12), the synchronous oil circuit (12) is connected to an oil circuit distributor (18) via an oil return branch circuit (13), and an electromagnetic throttle valve (21) is provided on the oil return branch circuit (13).

2. A derrick buffer cylinder balance control device according to claim 1, characterized in that: Also includes: A 220V AC circuit system and a 24V DC circuit system, wherein the oil pump (24) is powered by the 220V AC circuit system, an AC relay (25) is provided in the circuit where the oil pump (24) is located, the 24V DC circuit system comprises a 24V switching power supply (26) and an oil pump circuit, an alarm circuit, an oil cylinder circuit, a throttling circuit, a synchronization circuit, a pressure relief circuit, and a pressure gauge circuit connected in parallel with the 24V switching power supply (26) power supply circuit, the oil pump circuit is provided with an oil pump switch (7) and an AC relay (25), and the alarm circuit is provided with an alarm switch (9) and an alarm (27), the oil cylinder circuit is provided with an oil circuit distributor (18) and an oil cylinder circuit switch, the throttling circuit is provided with a throttle valve control switch (3) and an electromagnetic throttling valve (21), the synchronization circuit is provided with a synchronization electromagnetic valve (23) and a synchronization circuit switch (4), the pressure relief circuit is provided with a pressure relief circuit switch (5) and a first electromagnetic pressure regulating overflow valve (15) and a second electromagnetic pressure regulating overflow valve (16) arranged in parallel, and the pressure gauge circuit is provided with a first pressure display (28) and a second pressure display (29) connected in parallel.

3. A derrick buffer cylinder balance control device according to claim 2, characterized in that: An alarm probe (22) is provided on the housing of the second oil cylinder, and the alarm probe (22) is connected to the alarm switch (9) and the alarm (27).

4. A derrick buffer cylinder balance control device according to claim 2, characterized in that: A first pressure sensor (14) is provided on the oil return line of the first oil circuit (10), and the first pressure display (28) is used to display detection data of the first pressure sensor (14); a second pressure sensor (17) is provided on the oil return line of the second oil circuit (11), and the second pressure display (29) is used to display detection data of the second pressure sensor (17).

5. A derrick buffer cylinder balance control device according to claim 2, characterized in that: The oil circuit distributor (18) comprises a first solenoid valve (181) and a second solenoid valve (182); the oil cylinder circuit comprises a first oil cylinder circuit and a second oil cylinder circuit arranged in parallel; the oil cylinder circuit switch comprises a left oil cylinder circuit switch (1) and a right oil cylinder circuit switch (2); the first oil cylinder circuit is provided with a first solenoid valve (181) and a left oil cylinder circuit switch (1); the second oil cylinder circuit is provided with a second solenoid valve (182) and a right oil cylinder circuit switch (2).

6. A derrick buffer cylinder balance control device according to claim 2, characterized in that: A charging circuit is provided between the 24V switching power supply (26) and the 220V AC circuit system.

7. The derrick buffer cylinder balance control device according to claim 5, characterized in that: Also includes: A control panel is provided on the control panel, wherein a left cylinder circuit switch (1), a right cylinder circuit switch (2), a throttle valve control switch (3), a synchronization circuit switch (4), a pressure relief circuit switch (5), a power switch (6), an oil pump switch (7), an emergency stop switch (8) and an alarm switch (9) are provided, wherein the left cylinder circuit switch (1) is used to control a first solenoid valve (181), the right cylinder circuit switch (2) is used to control a second solenoid valve (182), the throttle valve control switch (3) is used to control a solenoid throttle valve (21), the synchronization circuit switch (4) is used to control a synchronization solenoid valve (23), the pressure relief circuit switch (5) is used to control a first solenoid pressure regulating overflow valve (15) and a second solenoid pressure regulating overflow valve (16) in the pressure relief circuit, the power switch (6) and the emergency stop switch (8) are both used to control a 24V switch power supply (26), and the power switch (6) and the emergency stop switch (8) are connected in series, and the alarm switch (9) is used to energize an alarm (27).

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