CN212102708U

CN212102708U - Constant current source intelligent control cabinet for crude oil electric dehydration

Info

Publication number: CN212102708U
Application number: CN202020530388.7U
Authority: CN
Inventors: 侯国艳; 姜添元; 姜宇; 李明睿
Original assignee: Anshan Guoyu Constant Current Source Equipment Co ltd
Current assignee: Anshan Guoyu Constant Current Source Equipment Co ltd
Priority date: 2020-04-12
Filing date: 2020-04-12
Publication date: 2020-12-08
Anticipated expiration: 2030-04-12

Abstract

An intelligent constant-current source control cabinet for electric dewatering of crude oil features that a thyristor device is connected to the main power supply loop to control the on-off of the main loop, the thyristor device is used as switch to control the inductor in the main loop, and the on-off of each thyristor device is controlled by an intelligent controller. The PLC controller is composed of a Siemens S7-200SMART series CPU ST40 and an extension module EM AE 04. The utility model has the advantages that: 1. compared with a device adopting a contactor, the device not only can save maintenance work and cost, but also greatly prolongs the service life and improves the explosion-proof grade and the safety of the cabinet; and 2, the PLC is adopted, so that the reliability of detection and control work is improved, the system is convenient to expand, and the PLC is suitable for the change of field conditions.

Description

Constant current source intelligent control cabinet for crude oil electric dehydration

Technical Field

The utility model relates to a switch board especially relates to a constant current source intelligent control cabinet that crude oil electric dehydration was used.

Background

At present, most oil fields in China enter a high water content exploitation stage, the water content of crude oil causes great troubles for gathering, transporting and refining of the oil fields, and the emission of the crude oil causes pollution to the environment, so the crude oil dehydration work becomes an indispensable process of the oil fields. Chinese patent No. CN203942152U discloses a product of "automatic control cabinet for crude oil electric dehydration constant current source", which can provide a power control device for crude oil electric dehydration process. However, the control loop and the main loop of the product are both common electric devices, and compared with electronic devices and power electronic devices, the product has the advantages of low integration level, poor reliability, short service life and no intelligent control mode, so that the performance of the product is limited to a certain extent, and the product is difficult to adapt to the complex field environment of crude oil dehydration production.

Disclosure of Invention

The utility model aims at providing a crude oil electric dehydration constant current source automatic control cabinet's improved generation product, what the control circuit of this product adopted is the electronic product PLC controller of high integrated level, what the control device of major loop adopted is power electronics product thyristor, therefore not only has higher reliability and longer life-span, is particularly suitable for the complicated site environment of crude oil dehydration production moreover.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the constant current source intelligent control cabinet for crude oil electric dehydration is formed from cabinet body, power supply main circuit mounted in the cabinet body and control circuit, and is characterized by that the power supply main circuit is connected with thyristor device as switch to control on-off of main circuit, the selection control of inductor in the main circuit also is controlled by using thyristor device as switch, the on-off of every thyristor device is controlled by an intelligent special-purpose controller, and the detection, display and control devices for working state are connected into a PLC controller to make control.

The thyristor is controlled by a special controller, the special controller is composed of a GY-DCF02A module, and all control electrodes and main electrodes 1 of five thyristors T1, T2, T3, T4 and T5 are respectively connected to corresponding pins of the GY-DCF02A module.

The main electrode 2 of a thyristor T1 as a switching device of the power supply main loop is connected with the output end A1 of a main loop incoming line switch, and the main electrode 1 of a thyristor T1 is connected with the output end point 03 of the main circuit; a main electrode 2 of a thyristor T2 of the main loop is connected with an output end 01 of a line incoming switch of the main loop, a main electrode 1 of a thyristor T2 is also connected with an output end 03 point of the circuit, a main electrode 2 of a thyristor T3 in the inductor control loop is connected with an output end B1 of the line incoming switch and an A3 end of an inductor L1, a main electrode 1 of a thyristor T3 is connected with a main electrode 2 of a thyristor T4 and an A5 end of an inductor L2, a main electrode 1 of a thyristor T4 is connected with an A4 end of the inductor L1 and a main electrode 2 end of the thyristor T5, a main electrode 1 of a thyristor T5 is connected with an A6 end of the inductor L2, a main electrode 1 of the inductor L2 is led out by a wire and passes through current transformers TA1 and TA2 to form an external output line; the

control electrodes

1 and 2 and the main electrodes 1 of all thyristors are controlled by a controller module; the output end of the current transformer TA1 is connected to the input end of the current transducer A1, the output end of the current transducer A1 is connected to the analog input end of the expansion module of the PLC controller, the output voltage between the 03 end and the A6 end of the main loop is 380V when the thyristor T1 is conducted bidirectionally, and the output voltage between the 03 end and the A6 end of the main loop is 220V when the thyristor T2 is conducted bidirectionally.

When the thyristor T1 of the power supply main loop is switched on and the thyristor T2 is switched off, and the thyristor T3 and the thyristor T5 in the inductor control loop are switched on simultaneously and the thyristor T4 is switched off, the inductors L1 and L2 run in parallel, and at the moment, the output voltage of the main loop is 380V; when the thyristor T2 of the main circuit of the power supply is turned on and the thyristor T1 is turned off, and the thyristor T3 and the thyristor T5 in the inductor control circuit are simultaneously turned on and the thyristor T4 is turned off, the inductors L1 and L2 are in parallel operation, and the output voltage of the main circuit is 220V at the moment; when the thyristor T2 of the main loop of the power supply is turned on and the thyristor T1 is turned off, and the thyristor T3 and the thyristor T5 in the inductor control loop are simultaneously turned off and the thyristor T4 is turned on, the inductors L1 and L2 are in series operation, and the output voltage of the main loop is 220V at the moment.

The PLC controller consists of a CPU ST40 and an expansion module EM AE04 of Siemens S7-200SMART series, wherein an output port on the CPU ST40 module is respectively connected with an oil output relay (I), an oil output relay (II), a debugging output relay, an alarm output relay, a low water level indicator lamp, a middle water level indicator lamp, a high water level indicator lamp, a starting indicator lamp, a stopping indicator lamp and a resetting indicator lamp, and a starting button contact, a stopping button contact, a recovery button contact, a low water level signal alarm contact, a middle water level signal alarm contact, a high water level signal alarm contact, an oil selector switch contact 1, an oil selector switch contact 2 and a debugging selector contact; the output signal of the voltage transmitter AV1, the output signal of the voltage transmitter AV2 and the output signal of the current transmitter a1 are connected to the expansion module EM AE04, respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

1. because the utility model discloses a thyristor device has selected as the break-make that the switch comes control main power supply and the working method of two inductors, compares with the device that adopts the contactor, not only can save maintenance work and expense, but also has improved life widely, has improved the explosion-proof grade and the security of cupboard.

2. Because the utility model discloses a PLC controller carries out the detection, demonstration and the control of the electric operating condition of cupboard, has not only improved the reliability that detects and control work, moreover, because it has software programming control's characteristics, therefore its control mode is more nimble convenient, the extension of the system of being convenient for and the change that is suitable for the site conditions.

Drawings

Fig. 1 is a circuit diagram of a power supply main circuit of a constant current source intelligent control cabinet for crude oil electric dehydration.

Fig. 2 is a circuit diagram of a PLC controller of a constant current source intelligent control cabinet for crude oil electric dehydration.

FIG. 3 is a chip pin diagram of the intelligent controller of the constant current source intelligent control cabinet for crude oil electric dehydration.

Fig. 4 is a circuit diagram of an operating power supply of the constant current source intelligent control cabinet for crude oil electric dehydration.

Detailed Description

The following describes the specific structure of the intelligent control cabinet in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2. The utility model discloses a constant current source intelligent control cabinet that crude oil electric dehydration used comprises the cabinet body and installs at the internal power major loop of cabinet and control circuit. The power supply main loop is connected with thyristor devices as switches to control the on-off of the main loop, the selection control of inductors in the main loop is also controlled by taking the thyristor devices as the switches, the on-off of each thyristor device is controlled by an intelligent special controller, and the devices for detecting, displaying and controlling the working state are all connected into a PLC controller to be controlled.

control electrodes

FIG. 3 is a chip pin diagram of the intelligent controller of the constant current source intelligent control cabinet for crude oil electric dehydration. The chip GY-DCF02A is mainly used for controlling the on and off of the thyristors T1-T5, thereby controlling the operation of the cabinet.

Fig. 4 is a circuit diagram of an operating power supply of the constant current source intelligent control cabinet for crude oil electric dehydration. The alternating current 220V power supply led out from the output ends A1 and 01 of the switch in the cabinet is changed into DC24V power supply through the switch power supply. The DC24V power supply supplies the CPU module and expansion module AE04 of the PLC, and also supplies the dedicated control module GY-DCF02A of the thyristor, the voltage transmitters AV1 and AV2 and the current transmitter a1, and also serves as a DC power supply for the water level sensor.

Claims

1. The constant current source intelligent control cabinet for crude oil electric dehydration is formed from cabinet body, power supply main circuit mounted in the cabinet body and control circuit, and is characterized by that the power supply main circuit is connected with thyristor device as switch to control on-off of main circuit, the selection control of inductor in the main circuit also is controlled by using thyristor device as switch, the on-off of every thyristor device is controlled by an intelligent special-purpose controller, and the detection, display and control devices for working state are connected into a PLC controller to make control.

2. An intelligent control cabinet of constant current source for crude oil electric dehydration as claimed in claim 1, characterized in that said thyristors are controlled by a dedicated controller, which is composed of GY-DCF02A module, all the control and main electrodes 1 of five thyristors T1, T2, T3, T4 and T5 are respectively connected to the corresponding pins of GY-DCF02A module.

3. An intelligent control cabinet of constant current source for crude oil electric dehydration as claimed in claim 1, characterized in that the main electrode 2 of thyristor T1 as switching device of the power main loop is connected with the output terminal A1 of the main loop inlet switch, and the main electrode 1 of thyristor T1 is connected with the output terminal 03 point of the main circuit; a main electrode 2 of a thyristor T2 of the main loop is connected with an output end 01 of a line incoming switch of the main loop, a main electrode 1 of a thyristor T2 is also connected with an output end 03 point of the circuit, a main electrode 2 of a thyristor T3 in the inductor control loop is connected with an output end B1 of the line incoming switch and an A3 end of an inductor L1, a main electrode 1 of a thyristor T3 is connected with a main electrode 2 of a thyristor T4 and an A5 end of an inductor L2, a main electrode 1 of a thyristor T4 is connected with an A4 end of the inductor L1 and a main electrode 2 end of the thyristor T5, a main electrode 1 of a thyristor T5 is connected with an A6 end of the inductor L2, a main electrode 1 of the inductor L2 is led out by a wire and passes through current transformers TA1 and TA2 to form an external output line; the control electrodes 1 and 2 and the main electrodes 1 of all thyristors are controlled by a controller module; the output end of the current transformer TA1 is connected to the input end of the current transducer A1, the output end of the current transducer A1 is connected to the analog input end of the expansion module of the PLC controller, the output voltage between the 03 end and the A6 end of the main loop is 380V when the thyristor T1 is conducted bidirectionally, and the output voltage between the 03 end and the A6 end of the main loop is 220V when the thyristor T2 is conducted bidirectionally.

4. An intelligent control cabinet of constant current source for crude oil electric dehydration as claimed in claim 3, characterized in that when thyristor T1 of said main power circuit is turned on and thyristor T2 is turned off, and when thyristor T3 and thyristor T5 in the inductor control circuit are turned on simultaneously and thyristor T4 is turned off, inductors L1 and L2 are in parallel operation, and then the main circuit output voltage is 380V; when the thyristor T2 of the main circuit of the power supply is turned on and the thyristor T1 is turned off, and the thyristor T3 and the thyristor T5 in the inductor control circuit are simultaneously turned on and the thyristor T4 is turned off, the inductors L1 and L2 are in parallel operation, and the output voltage of the main circuit is 220V at the moment; when the thyristor T2 of the main loop of the power supply is turned on and the thyristor T1 is turned off, and the thyristor T3 and the thyristor T5 in the inductor control loop are simultaneously turned off and the thyristor T4 is turned on, the inductors L1 and L2 are in series operation, and the output voltage of the main loop is 220V at the moment.

5. The intelligent control cabinet of constant current source for crude oil electric dehydration of claim 1, characterized in that the PLC controller is composed of siemens S7-200SMART series of CPU ST40 and expansion module EM AE04, the output port of the CPU ST40 module is respectively connected with oil output relay one, oil output relay two, debugging output relay, alarm output relay, low water level indicator lamp, middle water level indicator lamp, high water level indicator lamp, start indicator lamp, stop indicator lamp and reset indicator lamp, the input port is respectively connected with start button contact, stop button contact, recovery button contact, low water level signal alarm contact, middle water level signal alarm contact, high water level signal alarm contact, oil selector switch contact 1, oil selector switch contact 2 and debugging selector contact; the output signal of the voltage transmitter AV1, the output signal of the voltage transmitter AV2 and the output signal of the current transmitter a1 are connected to the expansion module EM AE04, respectively.