CN214125179U - Soft start control system for auxiliary motor of petroleum drilling machine - Google Patents

Abstract

The utility model discloses a soft start control system of oil-well rig auxiliary motor. The control system comprises a wireless transmitter, a wireless receiver and a PLC (programmable logic controller), the PLC is also connected with the soft starter and the relay, and the relay controls the on-off of the soft start loop contactor and the bypass contactor; one end of the soft start loop contactor is sequentially connected in series with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1, and the other end of the soft start loop contactor is sequentially connected in series with a thermal relay and a motor; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61. The utility model discloses an send operating command on the wireless transmitter, PLC is sent to after wireless receiver receives this operating command and handles, and the logical control through PLC carries out the relay and moves to close, moves disconnected drive contactor action and realizes the soft start of motor, stops remote control, and operation safety, motor control degree of automation are high.

Description

Soft start control system for auxiliary motor of petroleum drilling machine

Technical Field

The utility model belongs to the technical field of the oil-well rig, a soft start control system of oil-well rig auxiliary motor is related to, concretely relates to wireless remote control's soft start control system of oil-well rig auxiliary motor.

Background

When the oil drilling machine works, the soft start of the auxiliary motor is realized by the step-down start, so that the aim of smoothly starting the motor and a mechanical load is fulfilled, the influence of starting current on a power grid is reduced, and the power grid and a mechanical system are protected. In order to meet production requirements and facilitate operation, the motor is controlled in a multi-control mode in the soft starting process. At present, the common control modes include central control, machine side and cabinet control operation. The three operation modes coexist simultaneously, which brings much convenience to the control of the motor, but the control mode with the coexistence of multiple operation modes has the problems of complicated operation, manpower waste, improper coordination of multiple modes, unsafety and low automation degree.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a safe, wireless remote control's that degree of automation is high oil-well rig auxiliary motor soft start control system to the above-mentioned problem that the current soft start control mode of oil-well rig auxiliary motor exists.

The utility model aims at realizing through the following technical scheme:

a soft start control system for an auxiliary motor of an oil drilling machine comprises a wireless transmitter and a wireless receiver, wherein the wireless transmitter and the wireless receiver are communicated through wireless signals; the output end of the wireless receiver is connected with the input end of the PLC, and the input end of the PLC is also connected with the soft starter SS; the output end of the PLC is respectively connected with a relay 1 for controlling the soft start and stop of the motor and a relay 2 for controlling the bypass operation of the motor, the relay 1 controls the on-off of a soft start loop contactor, and the relay 2 controls the on-off of a bypass contactor; one end of the soft start loop contactor is sequentially connected with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1 in series, the other end of the soft start loop contactor is sequentially connected with a thermal relay and a motor in series, and a lead between the thermal relay and the motor penetrates through a current transformer; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61.

The soft starter SS is a bypass type soft starter;

the soft starter SS can be connected with more than two groups of thermal relays and soft start loop contactors in series and is connected with the same group of bypass contactors in parallel for controlling the soft start and stop of a plurality of motors.

As the technical scheme of the utility model prefers, above-mentioned wireless transmitter is wireless explosion-proof transmitter F24-T, and wireless receiver is F24-R wireless receiver.

Compare in oil-well rig auxiliary motor's current soft start control mode, the utility model discloses following beneficial effect has:

1. the utility model discloses a start on the wireless transmitter, stop the button and send operating command, PLC is sent to after wireless receiver receives this operating command and handles through its outdoor antenna, and logic control through PLC sends output command and gives execution relay, and execution relay moves to close, moves disconnected drive contactor action and realizes the soft start of motor, stops the remote control operation.

2. The utility model discloses a control system is applicable to any position that control range is radius 100 meters, and does not receive the influence of barrier, can satisfy on-the-spot operating mode condition. An operator can carry the light transmitter to freely walk at any time and any place, the operation is carried out without being influenced by the environment, and the accident potential caused by the factors such as wire control constraint, severe environment or improper command and coordination in the existing motor soft start control mode is avoided. Not only ensures safe operation, but also improves the automation degree of motor control, and greatly improves the production efficiency.

Drawings

Fig. 1 is a schematic diagram of a signal transmission process of each device in the control system of the present invention (taking a control system for controlling 10 motors as an example);

fig. 2 is a circuit diagram of the control system of the present invention (taking a control system for controlling 10 motors as an example);

fig. 3 is a flow chart for controlling the soft start of the motor by using the system of the utility model.

In the figure, Q1 is an AC400V incoming line breaker; KM61 is a soft start incoming line contactor; SS is a soft starter; KM011-KM101 is a soft start loop contactor; KM012-KM102 is a bypass contactor; KH1-KH10 are thermal relays; TA1-TA10 are current transformers; M1-M10 is a motor.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the utility model provides a pair of oil-well rig auxiliary motor soft start control system, including wireless transmitter and wireless receiver, wherein wireless transmitter is wireless explosion-proof transmitter F24-T, and wireless receiver is F24-R wireless receiver. The wireless transmitter transmits the wireless signal to the wireless receiver in a digital coding mode. The output end of the wireless receiver is connected with the input end of a PLC (central processing unit SR 60), and the input end of the PLC is also connected with a soft starter SS; the PLC output end is respectively connected with a relay 1 for controlling the soft start and stop of a motor M1 and a relay 2 for controlling the bypass operation of a motor M1, the relay 1 controls the on-off of a soft start loop contactor KM011, and the relay 2 controls the on-off of a bypass contactor KM 012; one end of a soft start loop contactor KM011 is sequentially connected in series with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1, the other end of the soft start loop contactor KM011 is sequentially connected in series with a thermal relay KH1 and a motor M1, and a lead between the thermal relay KH1 and the motor M1 penetrates through a current transformer TA 1; bypass contactor KM012 has one end connected in parallel between soft start loop contactor KM011 and thermal relay KH1, and the other end connected in parallel between incoming line breaker Q1 and soft start incoming line contactor KM 61.

Wherein, the soft starter SS is a bypass type soft starter; in the embodiment provided in fig. 1 and 2, the soft starter SS is connected in series with 10 sets of thermal relays (KH 1-KH 10) and soft start loop contactors (KM 011-KM 101) and in parallel with 10 sets of bypass contactors (KM 012-KM 102) for controlling the soft start and stop of 10 motors (M1-M10).

In fig. 2, the incoming line breaker Q1 is used for providing power supply and line total protection for a motor soft start control system, the soft start incoming line contactor KM61 is used for controlling the incoming line power supply of the soft starter, the SS of the soft starter is used for enabling the motor to achieve impact-free and smooth starting, the soft start loop contactor (KM 011-KM 101) is used for switching on/off the soft start loop, and controlling the soft start/stop of the motor (M1-M10) in a soft start state. The bypass contactor (KM 012-KM 102) is used for switching on/off a bypass, controlling the motor (M1-M10) to start/stop in a bypass state, the thermal relay (KH 1-KH 10) is used for carrying out overload protection on the motor (M1-M10), and the current transformer (TA 1-TA 10) is used for collecting current signals.

The control flow of the motor soft start control system of the utility model is shown in figure 3. Wherein, the soft start loop contactors (KM 011-KM 101) controlling the motors are interlocked.

The devices are assembled according to fig. 1 and 2, and after the system is ready, the motor M1 is signaled by a wireless transmitter to start or stop:

(1) the wireless transmitter sends an activation signal to motor M1:

the wireless receiver receives and processes the starting signal and outputs a starting command to the PLC; the PLC receives a starting command of the wireless receiver, detects a soft start loop contactor KM101 for controlling other motors, such as M10, when the work of the KM101 is detected, a relay 1 for controlling the soft start of the motor M1 and the soft start loop contactor KM011 do not act, the soft starter SS does not respond to the work of the soft starter, and the motor M1 does not run;

when KM101 does not work, a relay 1 for controlling motor M1 to be in soft start and a soft start loop contactor KM011 are controlled to be in a movable state, a soft starter SS works, and a motor M1 runs; within 20 seconds after the KM011 is dynamically closed, if the soft starter SS has no bypass signal output to the PLC, the relay 1 and the KM011 which control the motor M1 to be in soft start are dynamically disconnected, and the motor M1 stops running; if the PLC detects a bypass signal of the soft starter SS, controlling a relay 2 of a bypass of a motor M1 to be switched on and a bypass contactor KM012 to be switched on, controlling a bypass of a motor M1 to operate, controlling relays 1 and KM011 of the motor M1 to be switched off after KM012 is switched on for 3 seconds, and after the soft start is finished, normally operating the bypass; soft starter SS waits for the next soft start cycle as described above;

(2) the wireless transmitter sends a stop signal to motor M1:

the wireless receiver receives and processes the stop signal and outputs a stop command to the PLC; when the PLC receives a stop command of the wireless receiver, no matter the system is in a soft start state or a bypass state, the relays 1 and KM011 for controlling the soft start of the motor M1 and the relays 2 and KM012 for controlling the bypass operation of the motor M1 are all switched off, and the motor M1 stops operating.

Claims (3)

1. The utility model provides an oil-well rig auxiliary motor soft start control system which characterized in that: the wireless transmitter and the wireless receiver are communicated through wireless signals; the output end of the wireless receiver is connected with the input end of the PLC, and the input end of the PLC is also connected with the soft starter SS; the output end of the PLC is respectively connected with a relay 1 for controlling the soft start and stop of the motor and a relay 2 for controlling the bypass operation of the motor, the relay 1 controls the on-off of a soft start loop contactor, and the relay 2 controls the on-off of a bypass contactor; one end of the soft start loop contactor is sequentially connected with a soft starter SS, a soft start incoming line contactor KM61 and an incoming line breaker Q1 in series, the other end of the soft start loop contactor is sequentially connected with a thermal relay and a motor in series, and a lead between the thermal relay and the motor penetrates through a current transformer; one end of the bypass contactor is connected in parallel between the soft start loop contactor and the thermal relay, and the other end of the bypass contactor is connected in parallel between the incoming line breaker Q1 and the soft start incoming line contactor KM 61;

the soft starter SS is a bypass type soft starter;

the soft starter SS can be connected with more than two groups of thermal relays and soft start loop contactors in series and is connected with the same group of bypass contactors in parallel for controlling the soft start and stop of a plurality of motors.

2. The oil-well rig auxiliary motor soft start control system of claim 1, characterized by: the wireless transmitter is a wireless explosion-proof transmitter F24-T.

3. An oil rig auxiliary motor soft start control system as defined in claim 1 or 2, wherein: the wireless receiver is an F24-R wireless receiver.

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