Electric motor control cabinet for pumping unit

Abstract

The invention provides an electric motor control cabinet for a pumping unit. The electric motor control cabinet for the pumping unit comprises a weak current chamber at the upper layer and a glass reinforced plastic casing of a strong current chamber at the lower layer; a remote control receiving module, a short message sending module, a signal circuit transformer, a low-pressure remote transmission system control switch and a single well signal collection device are arranged inside the weak current chamber; a main power switch, an alarm bell, an alternating current contactor, a control loop switch, an electric motor protector, a capacitor switch, a lightning arrester and a capacitor are arranged inside the strong current chamber. The electric motor control cabinet for the pumping unit has the advantages of having electric isolation and electric motor protection functions of a traditional control cabinet and remote control oil well start and stop and fault short-message warning functions, overcoming the disadvantage that a metal outer casing control cabinet is poor in alkali-resisting and corrosion resistant capability and being light in weight, high in intensity and strong in corrosion resistance capability.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor control cabinet of an oil pumping unit. Background technique [0002] The production of pumping units is inseparable from the motor control cabinet. At present, the motor control cabinets generally use metal shells, especially the control cabinets located in coastal areas, due to their poor salt and alkali resistance and corrosion resistance, the general service life is 2-3 years. Frequent replacement of motor control cabinets not only increases the production cost but also reduces Increased well operating time rate. In addition, the motor control cabinet is installed outdoors. When starting the oil well, it needs to touch the metal casing. Manually starting and stopping the pumping unit in rainy, snowy and wet conditions may cause electric shock. At the same time, because the pumping unit must be found by the well patrol personnel when it fails, sometimes the pum...

AI Technical Summary

Problems solved by technology

At present, the motor control cabinets generally use metal shells, especially the control cabinets located in coastal areas, due to their poor salt and alkali resistance and corrosion resistance, the general service life is 2-3 years. Frequent replacement of motor control cabinets not only increases the production cost but also reduces well run time rate

Moreover, the motor control cabinet is installed outdoors. When starting the oil well, it needs to touch the metal casing. Manually starting and stopping the pumping unit in rainy, snowy and wet conditions may cause electric shock hazards.

At the same time, because the pumping unit must be found by the well patrol personnel when it fails, sometimes the pumping unit fails to stop, sometimes it runs for a long time with a fault, and it cannot be found in time, which may cause the motor to burn or downhole failure, resulting in greater damage. Economic losses

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