CN102566486B - Remote intelligent decoking program control device - Google Patents

Abstract

The invention discloses a remote intelligent decoking program control device, which comprises: the system comprises a human-computer terminal device, a PLC control system, an actuating mechanism system, a motion detection system and a data analysis system, wherein the motion detection system comprises a tension detection module, the tension detection module comprises a fixed pulley, a movable pulley and a tension sensor, the tension sensor is fixed on a steel wire rope of the fixed pulley, the actuating mechanism system comprises a drilling machine winch and an electric water faucet, and the drilling machine winch pulls a drill rod, a fulcrum bearing and a coke cutter to move up and down through the steel wire rope. According to the invention, the state and the working condition of the coke cutter are calculated by detecting the tension of the steel wire rope, so that the up-and-down operation and the rotation speed of the coke cutter are automatically adjusted, the conversion between a remote control mode and a coke cutting mode is realized, the labor intensity of workers is reduced, and the personal safety of the operators is ensured.

Description

A remote intelligent decoking program-controlled device

technical field

The invention relates to the field of delayed coking hydraulic coke cutting, in particular to a remote intelligent program control device for decoking.

Background technique

At present, the domestic hydraulic decoking program-controlled system still stays in several aspects of controlling the lifting equipment of the decoking drilling tool winch, the switch of the decoking control valve and the start-up of the high-pressure water pump. The decoking process is also judged by manual on-site operation and manual experience. The current program control system is a semi-automatic working process, and the on-site operating environment is harsh and the operation efficiency is low. With the expansion and transformation of domestic old coking machines and the popularization of automatic top and bottom cover machines, automatic detection and automatic control of the decoking process are also imperative. If V—represents the vertical linear displacement velocity of the drill pipe, W—represents the rotational angular velocity of the drill pipe, and L—represents the pitch or lead of the movement track (helix) of the focus cutting waterline, only V is the traditional focus cutting process. Controllable, W is constant, so L is variable, and only by manually adjusting V can the ideal L be obtained. Once V needs to be changed a lot, the quality and efficiency of cutting coke cannot be guaranteed, so the traditional manual operation mode or efficiency If it is too low or too fast, L becomes larger, which is likely to cause coke collapse and cause operational accidents. In addition, the hydraulic cutting coke tool has 2 modes: drilling mode and coke cutting mode. The coke cutter automatically switches between the two states according to the change of the water pressure, but whether the switching is successful or not, and the current state, were all manually observed in the past. Manual observation needs to lift the coke cutter to a place very close to the upper tower mouth, even so the situation in the tank is still unclear and dangerous.

In order to reduce the labor intensity of the staff and ensure the personal safety of the operators, the hydraulic decoking system is also required to achieve a high degree of automation and realize the safety interlock of the control equipment to improve the production efficiency of the device. Therefore, it is an urgent demand in the market to develop a remote intelligent hydraulic decoking control system that is suitable for both the renovation of old equipment and new equipment.

Contents of the invention

The technical problem to be solved by the invention is to provide a program-controlled device for intelligent decoking that improves production efficiency and shortens decoking time.

The specific technical scheme is realized by the following steps:

A remote intelligent decoking program-controlled device, comprising: man-machine terminal equipment, a PLC control system, an actuator system, a motion detection system and a data analysis system, wherein the motion detection system includes a tension detection module, and the tension detection module It includes a certain pulley, a moving pulley and a tension sensor, the tension sensor is fixed on the wire rope of the fixed pulley, the actuator system includes a drilling rig winch and an electric faucet, and the drilling rig winch pulls the drill pipe and the fulcrum bearing through the wire rope and the coke cutter move up and down, the electric faucet drives the drill pipe, the fulcrum bearing and the coke cutter to rotate, and the tension detection module is connected with the drilling rig drawworks and the electric faucet respectively through the wire rope connected.

Preferably, the motion detection system includes a drilling tool position detection module, and the drilling tool position detection module is connected to a PLC control system through a pulse counter.

Preferably, the motion detection system includes a drilling tool limit detection sensor, and the drilling tool limit detection sensor is fixed on the derrick guide rail.

Preferably, the motion detection system includes an automatic detection module for the thickness of the coke-cut coke, and the automatic detection module for the thickness of the coke-cut coke includes a coke thickness automatic detection probe and a dynamic analyzer. on the inner side wall, and is connected with the dynamic analyzer, and the coke-cut coke thickness automatic detection module is connected with the man-machine terminal equipment.

The present invention can automatically control the entire set of decoking equipment during the hydraulic decoking process of the delayed coking device, and can also manually and remotely operate the entire set of decoking equipment. Improve the production efficiency of the device, especially through the control of the drilling rig winch and the electric faucet, it can automatically adjust the constant pitch according to the thickness of the coke in the coke drum, and can choose different leads on the man-machine interface according to the hardness of the coke. Let the system automatically cut coke according to the artificially selected lead, shorten the decoking time, realize the reduction of energy consumption in the decoking process, and improve the coke cutting efficiency; status and working conditions, so as to automatically adjust the up and down movement and rotation speed of the focus cutter. The switch between remote control and focus cutting mode reduces the labor intensity of the staff and ensures the personal safety of the operator.

Description of drawings

Figure 1: It is a structural diagram of a remote intelligent decoking program-controlled device provided by an embodiment of the present invention.

Fig. 2: is the schematic diagram of the coke cutting coke thickness automatic detection module provided by the embodiment of the present invention;

Fig. 3: is the schematic diagram of the wire rope tension detection module provided by the embodiment of the present invention;

Fig. 4: It is a schematic diagram of the drilling tool limit detection method provided by the embodiment of the present invention.

1. Coke tower, 2 Drilling rig winch, 3. Electric faucet, 5. Drilling tool, 7. Remote decoking operation table, 13. Coke cutting coke thickness automatic detection probe, 14. Dynamic analyzer, 6. Fixed pulley, 17. Movable pulley, 18, tension sensor, 21, drilling rod, 22, limit switch, 23, fulcrum bearing.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, and the given examples are only for clarifying the present invention, not for limiting the scope of the present invention.

Below in conjunction with accompanying drawing Fig. 1, Fig. 2, Fig. 3 and Fig. 4 and embodiment, the present invention is described in detail as follows:

A remote intelligent decoking program-controlled device includes: man-machine terminal equipment, a PLC control system (programmable control system), an actuator system, a motion detection system and a data analysis system.

This device contains 2 sets of independent PLC systems. The control objects and testing instruments of the PLC system are respectively:

The actuator system includes:

(1) High pressure pump outlet valve, high pressure water pump unit.

(2) Drilling tool motion control equipment: as shown in Figure 1, the remote intelligent decoking program control device provided by the embodiment of the invention, wherein the drilling tool motion control equipment includes drilling rig drawworks 2, electric water tap 3, tower top isolation valve, decoking Control valve. The tension detection module is connected with the drilling rig drawworks 2 and the electric faucet 3 respectively through steel wires.

Motion detection systems include:

(1) The instruments of the high-pressure water line and the instruments of the high-pressure water pump unit. Among them, the instruments of the high-pressure water pump unit mainly detect: high-level water tank liquid level, inlet pressure, lubricating oil pressure and liquid level, water pump unit temperature, water pump unit vibration and water pump unit displacement.

(2) A tension detection module, a drilling tool position detection module, a drilling tool limit detection sensor, and an automatic detection module for coke cutting coke thickness.

As shown in Figure 3, a kind of steel wire rope tension detection module provided by the present embodiment, wherein, tension detection module comprises certain pulley 16, a moving pulley 17 and tension sensor 18, tension sensor 18 is fixed on fixed pulley 16 steel wire rope dead ends, tension Sensor 18 directly detects the pulling force of a single wire rope;

The drilling tool position detection module is connected with the PLC control system through the pulse counting device;

As shown in Figure 4, this embodiment provides a drilling tool limit detection method, wherein the drilling tool limit detection sensor is fixed on the derrick guide rail, when the drill pipe 21 moves, the drill pipe 21 drives the fulcrum bearing 23 along the The derrick guide rail moves up and down, and the drilling tool limit detection sensor can detect the metal baffle on the fulcrum bearing 23, wherein the drilling tool limit detection sensor adopts an inductive sensor for non-contact detection of metal;

As shown in Figure 2, a kind of coke coke thickness automatic detection module provided by the present embodiment, wherein, coke cutting coke thickness automatic detection module comprises a coke thickness automatic detection probe 13 and a dynamic analyzer 14, coke thickness automatic detection probe 13 Installed on the inner wall of the coke tower 1 and connected with the dynamic analyzer 14, the coke cutting coke thickness automatic detection module is connected with the remote decoking operation platform 7.

The method of using this device is as follows:

The main work of the operators is to be completed in the operation room of the water pump room, and monitor the condition of each key equipment through the TV camera system. On the remote decoking operating platform 7 in the water pump room operation room, automatic decoking can also be performed by manually operating equipment such as a winch in a traditional manner to complete decoking.

1) The DCS or coke tower valve interlocking control system gives the coke tower 1 allowable decoking signal.

2) After the remote intelligent decoking system receives the decoking permission signal, the drawworks 2 of the drilling rig will automatically start and descend to the initial origin (planned to be 5 meters inside the tower), and the isolation valve at the top of the tower will automatically open.

3) The high-pressure water pump control subsystem asks the operator to select the decoking water pump, and detects whether the instrument signal of the selected water pump meets the starting conditions.

4) After the conditions of the high-pressure water pump are met, the outlet valve of the pump will be automatically opened after manual confirmation, and the start of the high-pressure water pump will be delayed after the valve is fully opened.

5) After the high-pressure water pump runs stably, the initial state of the decoking three-position valve is the reflux control state. If the cut-off valve of the coke tower 1 is opened, the pre-charging is performed through the pre-charging and de-coking control switch of the coke tower 1. After the pre-charging is completed Under the normal condition of each valve position, the decoking condition can be used for full-open control, and the full-open position can be fully opened. At the same time, the tension detection module judges the state of the coke cutter.

6) The decoking valve is fully opened and in place. At the same time, the water pressure at the top of the coke tower reaches the set value, and the drilling rig drawworks 2 and the electric motor start to drill coke. After the drilling process is automatically completed, the PLC control system sends a signal to the man-machine terminal equipment to prompt the operator whether to enter the next step of reaming process.

7) After the reaming is completed and confirmed by the operator, the focus cutter enters into automatic focus cutting. First, the coke thickness automatic detection module detects the coke thickness in the coke drum 1, and through the detection data of the tension sensor, the PLC system analyzes it on its platform. Speed of lifting and rotation.

8) During the coke cutting process, the wire rope tension is displayed in real time, and the coke cutting cannot be stopped unless the remote intelligent defocusing system sends a signal of the completion of the coke cutting.

9) After the coke cutting is completed, the high-pressure water pump automatically stops after manual confirmation, the drilling tool quickly returns to the origin (5 meters inside the tower), and the partition on the top of the tower is closed.

10) The drilling tool rises to the upper limit of the coke tower 1 and stops, and the drawworks and electric motor of the drilling rig are powered off. The remote intelligent decoking system sends a decoking end signal to DCS or valve interlock sequence control system.

Among them, in the motion detection system, the speed of lifting up and down (V) is controlled, and the rotation (W) is controlled, and the lead L=(360 degrees/W)×V. When the cutting tool moves in the coke tower 1, the cutting water injects a trajectory of a double helix. In the trajectory, the pitch, that is, the size of the lead, determines the quality and efficiency of cutting coke. In the process of automatic coke cutting of the present invention, by the detection result of wire rope tension sensor 18, PLC system runs analysis system on its hardware platform, according to analysis result, adjust coke cutter up and down and lift and up and down respectively by drilling rig car 2 and electric faucet 3 The speed of rotation. When the V value changes, the W value will automatically follow the change and be automatically adjusted through the electric faucet 3 so that L remains constant. The operator can select different leads on the man-machine interface according to the hardness of the coke, and let the system automatically cut the coke according to the artificially selected lead.

In addition, because the steel wire high-pressure water has a recoil force on the coke cutter, and the recoil force of the two states is different, the recoil force will offset part of the wire rope tension. The system calculates the state of the coke cutter by detecting the wire rope tension.

The above are only preferred embodiments of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (4)

1. a long-range decoking program control device, it is characterized in that, comprise: man-machine terminal equipment, PLC control system, actuator system, movement detection systems and data analysis system, wherein, described movement detection systems comprises a pulling force detection module, described pulling force detection module comprises a fixed pulley, one travelling block and pulling force sensor, described pulling force sensor is fixed on the wire rope of described fixed pulley, described actuator system comprises a boring winch and an electric swivel, described boring winch pulls drilling rod by wire rope, fulcrum roller and coke cutter move up and down, described electric swivel drives described drilling rod, described fulcrum roller and described coke cutter rotatablely move, by the detection data of described pulling force sensor, through described PLC control system Operational Data Analysis system on its hardware platform, obtain analysis result, according to described analysis result, by described boring winch and described electric swivel, adjust respectively the speed that described coke cutter promotes up and down and rotates, described pulling force detection module is connected with described electric swivel with described boring winch respectively by described wire rope.

2. device according to claim 1, is characterized in that, described movement detection systems comprises drilling tool position detecting module, and described drilling tool position detecting module is connected with PLC control system by count pulse device.

3. device according to claim 1, is characterized in that, described movement detection systems comprises the spacing detecting sensor of drilling tool, and the spacing detecting sensor of described drilling tool is fixed on derrick guide rail.

4. according to the arbitrary described device of claim 1-3, it is characterized in that, described movement detection systems comprises cuts burnt coke thickness automatic detection module, describedly cut burnt coke thickness automatic detection module and comprise the automatic detection probe of a coke thickness and a kinetic analyzer, the automatic detection probe of described coke thickness is arranged on coke drum madial wall, and be connected with described kinetic analyzer, described in cut burnt coke thickness automatic detection module and described man-machine terminal equipment connection.

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