CN205422589U - Alternating current drives fill head - Google Patents

Abstract

An AC electric drive injection head, including a main frequency conversion motor, a secondary frequency conversion motor, a transmission shaft, an angle transmission box, a reduction box, a drive sprocket, a drive chain, a clamping block, and an injection head base body. The main frequency conversion motor and the secondary frequency conversion motor are fixed on the On the base of the injection head, its output shaft is connected to the transmission shaft, the transmission shaft is connected to the angle transmission box through the flange, the angle transmission box is connected to the reduction box through the spline shaft, the reduction box is connected to the driving sprocket through the spline, and the reduction box is connected to the drive sprocket through the bolt Connect the base body of the injection head, the clamping block is installed on the driving chain, the driving chain is installed on the driving sprocket, and the front end of the angle transmission box is also equipped with a brake device. The utility model solves the problem that the temperature of the hydraulic oil in the system is too high and the stability of the system is poor when the complete machine of the coiled tubing operation is in operation; there are few operation buttons and the degree of automation is high.

Description

An alternating current drive injection head

technical field

The utility model belongs to petroleum machinery, in particular to an injection head.

Background technique

As the main part of the coiled tubing operation, the injection head bears the weight of the coiled tubing and provides power for the hoisting and running of the coiled tubing. At present, the conventional injection head drive mode adopts hydraulic drive mode, the power is taken by the chassis engine, and the injection head hydraulic pump is driven by the transfer case to provide power for the operation of the injection head motor, and the pressure and displacement of the injection head hydraulic pump are adjusted through the manual pressure regulating valve. And the displacement of the injection head motor to control the torque of the injection head to lift the load and the speed of lifting and lowering the oil pipe respectively. During operation, multiple valves need to be operated to achieve function conversion, and the degree of automation is not high; and the hydraulic transmission is sensitive to changes in oil temperature, which will affect the stability of the system operation. Since the hydraulic system of the injection head adopts a closed system, the long-term The system generates a lot of heat during operation, which leads to the high oil temperature of the hydraulic system of the whole machine, the overall stability of the system is poor, and the hydraulic transmission has more energy loss during the working process. With the high pressure, high speed, high efficiency and large flow , The noise of hydraulic components and systems increases.

Contents of the invention

The purpose of this utility model is to provide a new type of injection head driven by AC power. The injection head uses power frequency power to drive the AC variable frequency motor to run after the speed is adjusted by the frequency converter to drive the transmission shaft, the angle transmission box and the reduction box to decelerate, and finally become the injection head. The chain operation provides power, and the injection head can improve the stability of the system, high degree of automation and high energy efficiency.

To achieve the above object, the technical solution of the utility model is:

An AC electric drive injection head, including a main frequency conversion motor, a secondary frequency conversion motor, a transmission shaft, an angle transmission box, a reduction box, a drive sprocket, a drive chain, a clamping block, and an injection head base, characterized in that: the main frequency conversion motor And the auxiliary frequency conversion motor is fixed on the base of the injection head, its output shaft is connected to the transmission shaft, the transmission shaft is connected to the angle transmission box through the flange, the angle transmission box is connected to the reduction box through the spline shaft, and the reduction box is connected to the driving sprocket through the spline Connection, the reduction box is connected to the base body of the injection head by bolts, the clamping block is installed on the driving chain, the driving chain is installed on the driving sprocket, and the front end of the angle transmission box is also equipped with a brake device.

Cooling fans are installed on the main frequency conversion motor and the auxiliary frequency conversion motor.

The main frequency conversion motor and the auxiliary frequency conversion motor are respectively connected with the main frequency converter and the auxiliary frequency converter. The auxiliary frequency conversion motor is connected with the main frequency converter through an incremental encoder. The small PLC module is connected with the man-machine interface.

The beneficial effects of the utility model are:

1. The electric drive system solves the problem that the hydraulic oil temperature of the system is too high when the coiled tubing operation is running, and the system stability is poor;

2. The AC frequency conversion motor directly provides power for the injection head, without redundant valves and long hydraulic pipelines, and the system has high energy efficiency utilization;

3. It only needs to control the input frequency of the motor to obtain the required power and speed, with fewer operation buttons and a high degree of automation.

Description of drawings

Fig. 1 is a front view of the utility model;

Fig. 2 is the axonometric drawing of the utility model;

Fig. 3 is the schematic diagram of the frequency conversion control of the utility model.

detailed description

Below in conjunction with accompanying drawing 1-3 and specific embodiment, the utility model is described in further detail.

The output shafts of the main frequency conversion motor 1 and the auxiliary frequency conversion motor 2 are respectively connected with the transmission shaft 3, the transmission shaft 3 is connected with the angle transmission box 4, the angle transmission box 4 is connected with the reduction box 5, and the reduction box 5 is connected with the drive sprocket 6; The frequency conversion motor 1 and the auxiliary frequency conversion motor 2 are equipped with cooling fans 11 for cooling the motors. When the braking device 10 at the front end of the angular transmission box 4 is released, the small and medium-sized PLC module 14 sends commands to control the main unit by controlling the man-machine interface 15 buttons. Inverter 12 and auxiliary inverter 13, the main inverter 12 and auxiliary inverter 13 are respectively connected to the power sources of two frequency conversion motors, supplying power to the main frequency conversion motor 1 and auxiliary frequency conversion motor 2, and the main frequency conversion motor 1 and auxiliary frequency conversion motor 2 The output power is finally transmitted to the driving sprocket 6 through the transmission shaft 3, the angle transmission box 4, and the reduction box 5. The driving sprocket 6 drives the chain 7 and the clamping block 8 to run, and the clamping cylinder clamp on the base body 9 of the injection head After the tubing is tightened, the coiled tubing is driven up or down. The incremental encoder 16 receives the running speed of the auxiliary motor 2 and feeds back the number of pulses to the main inverter 12 . The two inverters synchronously coordinate the motor to drive the sprocket of the injection head to run, and finally ensure that the output speed is synchronized and the torque is equal to achieve stable and synchronous operation of the chains on both sides, ensuring the stable operation of the injection head system.

Claims (3)

1. An AC electric drive injection head, including main frequency conversion motor (1), auxiliary frequency conversion motor (2), transmission shaft (3), angle transmission box (4), reduction box (5), drive sprocket (6), The drive chain (7), the clamping block (8), and the base of the injection head (9), are characterized in that the main frequency conversion motor (1) and the auxiliary frequency conversion motor (2) are fixed on the base of the injection head (9), and the output shaft Connect with the transmission shaft (3), the transmission shaft (3) is connected to the angle transmission box (4) through the flange, the angle transmission box (4) is connected to the reduction box (5) through the spline shaft, and the reduction box (5) is through the spline It is connected with the driving sprocket (6), the reduction box (5) is connected with the injection head base (9) by bolts, the clamping block (8) is installed on the driving chain (7), and the driving chain (7) is installed on the driving sprocket ( 6) On, the front end of the angle transmission box (4) is also equipped with a braking device (10). 2. An AC-driven injection head according to claim 1, characterized in that: the main variable frequency motor (1) and the secondary variable frequency motor (2) are equipped with cooling fans (11). 3. An AC electric drive injection head according to claim 1, characterized in that: the main variable frequency motor (1) and the secondary variable frequency motor (2) are respectively connected with a main frequency converter (12) and a secondary frequency converter (13) , the auxiliary variable frequency motor (2) is connected to the main inverter (12) through an incremental encoder (16), and the other end of the main inverter (12) and the auxiliary inverter (13) are connected to a small and medium-sized PLC module (14). The small PLC module (14) is connected with the man-machine interface (15).