Hydraulic control system of tube drawbench lifting mechanism

Abstract

The invention discloses a hydraulic control system of a tube drawbench lifting mechanism. The hydraulic control system of the tube drawbench lifting mechanism comprises a manual pump, a pilot operated directional control valve, a second shuttle valve, a motor, a balance valve, a first shuttle valve, a solenoid directional control valve, a second throttle valve, a multi-way valve, a second pressure reducing valve, a drum, a pressure measuring joint, a first pressure reducing valve, an electromagnetic proportional pressure reducing valve, a first overflow valve, a first balance heavy oil cylinder, a second balance heavy oil cylinder, a first one-way valve, a first throttle valve, a brake, a pressure transmitter, a displacement sensor and a load sensor, wherein the pilot operated directional control valve and the second shuttle valve are connected with the manual pump; the motor, the balance valve, the first shuttle valve, the solenoid directional control valve, the second throttle valve and the multi-way valve are connected with the pilot operated directional control valve; the second pressure reducing valve is connected with the second shuttle valve; the drum is connected with the motor; the pressure measuring joint is connected with the balance valve; the first pressure reducing valve, the electromagnetic proportional pressure reducing valve, the first overflow valve, the first balance heavy oil cylinder and the second balance heavy oil cylinder are connected with the multi-way valve; the first one-way valve, the first throttle valve and the brake are connected with the second pressure reducing valve; the pressure transmitter is connected with the first overflow valve; the displacement sensor is mounted on the first balance heavy oil cylinder or the second balance heavy oil cylinder; and the load sensor is connected with the first balance heavy oil cylinder and the second balance heavy oil cylinder. By the hydraulic control system of the tube drawbench lifting mechanism, damage of screw threads can be avoided, quick shutting and slow starting of the brake are realized, and the tube drawbench lifting mechanism can descend stably when in emergency circumstances.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a hydraulic control system for a lifting mechanism of a pipe arrangement machine. Background technique [0002] The pipe racking machine is a transportation tool in the pipe processing system of an oil drilling rig. In order to perform fast drilling operations in drilling operations, it is usually necessary to connect multiple drill pipes, drill collars and casings in advance to form roots and store them inside the derrick fingerboard. The pipe rowing machine is a manipulator that clamps and moves the pipe stand during the process of grabbing, moving, removing the pipe stand and connecting the drill string. The lifting mechanism of the pipe row is the key mechanism to complete its action. Its control system is the pipe row The core of the machine control system. [0003] The lifting mechanism of the pipe rowing machine realizes the lifting and lowering of th...

AI Technical Summary

Problems solved by technology

[0008] The hydraulic oil enters the brake 09 through the shuttle valve 03 and the three-way ball valve 04, and pushes the spring in the chamber to release the brake 09. The pressure value of the control oil of the brake 09 is large and the fluctuation will affect the reliability of the brake 09. It is not recommended to use high pressure for the brake 09 The control oil needs to limit the control pressure to prolong the life, which also makes the work of the brake 09 more stable and reliable. At the same time, when the hydraulic oil of this system enters the brake 09, the brake will be opened, and the opening time of the brake cannot be controlled.

[0009] The hoisting mechanism of the pipe racking machine is designed with an emergency lowering function, but the lifting motor and its control components must be on the upper part of the pipe racking machine. For emergency lowering, the staff needs to climb to the high position of the pipe racking machine to open the two-way ball valve 05 to realize the A of the motor 07. , B port connection, the operation is dangerous and inconvenient. During the emergency release process, the internal leakage of the motor 07 will cause the pressure in the main oil circuit to drop, and the main oil circuit needs to be replenished with oil, but the circuit has no oil replenishment function.

[0010] The pipe rowing machine can only be used for the connection, transportation and discharge of drill pipes. For drill collars and casings, it can only be connected and operated by the floating crane system. When lowering and connecting with another vertical root, a slight position error will generate a large force under the gravity of the vertical root and the lifting mechanism, and it is easy to damage the threaded buckle. The damaged threaded buckle connection will lead to insufficient strength and is prone to danger. In some cases, the threaded thread with serious damage will directly cause the standing root to be unable to connect, the drilling work cannot be carried out smoothly, and the construction period will be delayed.

Images