Energy-saving electromagnetic three-way rotating valve for oil field

Abstract

The invention discloses an energy-saving electromagnetic three-way rotating valve for an oil field. The energy-saving electromagnetic three-way rotating valve for the oil field comprises a step saltation direct-current control circuit, wherein the step saltation direct-current control circuit comprises a first time relay and a second time relay, and the first time relay and the second time relay are arranged in parallel; phase lines at the power supply ends of the first time relay and the second time relay are connected with the output end of a single-well metering device, and zero lines at the power supply ends of the first time relay and the second time relay are connected with the zero line of the single-well metering device; the output end of the first time relay is connected with the primary level of a transformer, the secondary level of the transformer is connected with the alternating current end of a first silicon bridge rectifier, and the direct current end of the first silicon bridge rectifier is connected with an electromagnetic drive coil; and the output end of the second time relay is connected with the alternating current end of a second silicon bridge rectifier, and the direct current end of the second silicon bridge rectifier is connected with the electromagnetic drive coil. The energy-saving electromagnetic three-way rotating valve provided by the invention realizes direct-current step saltation control, overcomes the defects of a pull-type alternating current magnetic valve, is flexible to rotate and is good in sealing property.

Description

technical field [0001] The invention relates to an electromagnetic valve, in particular to an energy-saving electromagnetic three-way rotary valve for oil fields, which is mainly suitable for oil well metering in oil fields. Background technique [0002] In the prior art, there are many metering methods for oil wells in oil fields. Changqing Oilfield Branch uses double-volume separators to measure oil wells. There are more than 200 traction-type AC electromagnetic three-way valves, and the electromagnets used are all MQ1. —5151 series. For example, Chinese Patent No. "CN02208446.0" discloses a rotary electromagnetic three-way valve for single well metering system of crude oil. Core, lower chamber port, upper chamber port, T-shaped passage, oil discharge outlet, electromagnetic coil in the explosion-proof casing, return spring between the explosion-proof casing and the valve cylinder, valve core in the valve cylinder, and T-shaped passage on the valve cylinder , Both ends o...

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Problems solved by technology

[0003] The rotary electromagnetic three-way valve with the above structure still has the following disadvantages in use: 1. Due to the use of AC excitation control, the pull-in voltage adopts AC380V, and the holding voltage also adopts AC380V, and the surface of the electromagnet armature itself is uneven and the pull-in is not good. As well as the influence of many external factors, under frequent operating conditions, it is very easy to cause the electromagnetic control coil to burn out, the cost of replacing the coil is high, and it is a waste of electric energy

And seriously affected the normal progress of the measurement work

2. The starting and running noise is loud, rattling can be heard 100 meters away, which causes great pollution to the environment. The traction type three-way valve has a small caliber, long oil discharge time, and large power consumption; large oil leakage, metering Inaccurate

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