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CN-224233389-U - Chemical engineering non-disturbance power supply device based on double PT logic switching

CN224233389UCN 224233389 UCN224233389 UCN 224233389UCN-224233389-U

Abstract

The utility model discloses a chemical engineering undisturbed power supply device based on double PT logic switching, which comprises an undisturbed switching device, a first PT and a second PT, wherein an MCU control module is integrated in the undisturbed switching device, the MCU control module is connected with a logic control module and a double-path analog quantity input module, the first PT and the second PT are respectively arranged at different positions of the same bus, the double-path analog quantity input module is respectively connected with secondary side outputs of the first PT and the second PT, and the logic control module is used for receiving signals of the first PT and the second PT and triggering switching when both paths of signals are lower than a setting value. The utility model is provided with a double-path analog quantity input module and a logic control module inside the undisturbed switching device, and simultaneously, a first PT and a second PT are connected in series on each section of bus, the double-path analog quantity input module of the undisturbed switching device is respectively connected with the secondary side outputs of the first PT and the second PT, and the logic control module receives signals of the first PT and the second PT.

Inventors

  • MI HAIJUN
  • WANG JUNQIANG
  • GAO XIONG
  • Deng Zhide

Assignees

  • 陕西北元化工集团股份有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (8)

  1. 1. The chemical engineering undisturbed power supply device based on double PT logic switching comprises an undisturbed switching device, a first PT and a second PT, and is characterized in that an MCU control module is integrated in the undisturbed switching device, the MCU control module is connected with a logic control module and a double-path analog quantity input module, the first PT and the second PT are respectively arranged at different positions of the same bus, the double-path analog quantity input module is respectively connected with secondary side outputs of the first PT and the second PT, and the logic control module is used for receiving signals of the first PT and the second PT and triggering switching when both paths of signals are lower than a setting value.
  2. 2. The chemical engineering undisturbed power supply device based on double PT logic switching, as set forth in claim 1, is characterized in that the logic control module comprises an analog quantity input unit, a signal processing unit, a logic operation unit, a control output unit and a man-machine interaction unit, wherein the analog quantity input unit is used for receiving voltage signals output by a first PT and a second PT and completing analog-to-digital conversion, the signal processing unit is used for filtering the received voltage signals, calculating an effective value and comparing amplitude values, the logic operation unit is used for executing double PT logic switching judgment, the control output unit is used for sending an opening and closing instruction to a circuit breaker, and the man-machine interaction unit is used for parameter setting, state display and fault inquiry.
  3. 3. The chemical engineering undisturbed power supply device based on double PT logic switching according to claim 1, wherein the undisturbed switching device comprises a machine body (1), a radiating fin (2) is installed at an opening at the rear end of the machine body (1), a through hole is formed in the side face of the machine body (1) along the rear of the radiating fin (2), a drainage cover (3) is installed at the opening at the rear end of the machine body (1), a corrugated hose (4) is arranged at the rear end of the drainage cover (3), and a radiating fan (5) is connected to the end portion of the corrugated hose (4).
  4. 4. The chemical engineering undisturbed power supply device based on double PT logic switching according to claim 3, wherein a control panel (11) is arranged on the front face of the machine body (1), fixing feet (12) are symmetrically arranged on two sides of the front end of the machine body (1), fixing holes (13) are formed in the fixing feet (12), and jackscrews (14) are arranged on two sides of the machine body (1) close to the opening of the rear end.
  5. 5. The chemical non-disturbance power supply device based on double PT logic switching according to claim 3, wherein the radiating fins (2) are formed by aluminum processing, mounting plates (21) are symmetrically arranged on two sides of the radiating fins (2), a plurality of mounting holes (22) are formed in the mounting plates (21), and the radiating fins (2) are fixed on the inner side of a rear end opening of the machine body (1) through bolts.
  6. 6. The chemical non-disturbance power supply device based on double PT logic switching as claimed in claim 4, wherein a switching tube (31) is arranged at the rear end of the drainage cover (3), an inserting ring (32) is arranged at the front end of the drainage cover (3), the inserting ring (32) is inserted into an opening at the rear end of the machine body (1), and the jackscrew (14) is abutted against the inserting ring (32).
  7. 7. The chemical non-disturbance power supply device based on double PT logic switching as claimed in claim 6, wherein one end of the corrugated hose (4) is provided with a mounting cap (41), the mounting cap (41) is in threaded connection with the adapter tube (31), and the other end of the corrugated hose (4) is provided with a guide cover (42).
  8. 8. The chemical non-disturbance power supply device based on double PT logic switching as claimed in claim 7, wherein the cooling fan (5) is installed inside the air guide sleeve (42), the cooling fan (5) is in threaded connection with the air guide sleeve (42), a compression ring (51) is arranged at the top end of the cooling fan (5) and used for being compressed on the top of the air guide sleeve (42), a communication wire (52) is arranged on the side face of the cooling fan (5), and a communication plug (53) is arranged at the end of the communication wire (52).

Description

Chemical engineering non-disturbance power supply device based on double PT logic switching Technical Field The utility model relates to the technical field of power supply, in particular to a chemical engineering undisturbed power supply device based on double PT logic switching. Background The undisturbed device of the 10kV system of the chemical branch company acquires single PT signals by the current switching logic, and in order to ensure the action reliability, the undisturbed device starts the logic after all the voltage and current signals disappear, so as to avoid misoperation risks caused by PT insurance fusing. In the prior art, the invention patent with publication number CN105515172A discloses a power supply switching judging method of a pressure transmitter, an input sensing signal is preprocessed through a pre-amplifying circuit, a secondary signal processing circuit performs secondary processing, a generated digital signal is sent to a microcontroller, the pressure transmitter is powered by a first power supply, meanwhile, the microcontroller is in bidirectional communication with a remote terminal with communication authority through a first interface, the processing state of the sensing signal is displayed on a first flexible display device, the pressure transmitter is further provided with a local backup storage subsystem, storage backup and power backup are performed through the local backup storage subsystem, and a backup power supply and a conventional power supply can be switched. The power supply switching judging method provided by the patent is not suitable for power supply in the chemical industry field, the power supply in the chemical industry field needs to ensure the stability of a power supply system, and in practice, after the power supply side loses power, a current signal needs to last for a certain time from falling to disappearing (the current disappears and the program judging needs to be executed), so that a disturbance-free switching device cannot act in time, and then a part of equipment is caused to jump and stop at low voltage, and even an interlocking system stops. Disclosure of utility model The utility model aims to provide a chemical engineering undisturbed power supply device based on double PT logic switching, and aims to solve the problem that the existing undisturbed switching device cannot react and switch quickly and affects stable power supply of a chemical engineering system. The utility model is realized in the following way: The chemical engineering undisturbed power supply device based on double PT logic switching comprises an undisturbed switching device, a first PT and a second PT, wherein an MCU control module is integrated in the undisturbed switching device, the MCU control module is connected with a logic control module and a double-path analog quantity input module, the first PT and the second PT are respectively arranged at different positions of the same bus, the double-path analog quantity input module is respectively connected with secondary side outputs of the first PT and the second PT, and the logic control module is used for receiving signals of the first PT and the second PT and triggering switching when both paths of signals are lower than a setting value. The logic control module comprises an analog input unit, a signal processing unit, a logic operation unit, a control output unit and a man-machine interaction unit, wherein the analog input unit is used for receiving voltage signals output by a first PT and a second PT and completing analog-to-digital conversion, the signal processing unit is used for filtering the received voltage signals, calculating an effective value and comparing amplitude values, the logic operation unit is used for executing double PT logic switching judgment, the control output unit is used for sending an opening and closing instruction to a circuit breaker, and the man-machine interaction unit is used for parameter setting, state displaying and fault inquiring. Preferably, the undisturbed switching device comprises a machine body, a radiating fin is arranged at the opening at the rear end of the machine body, a through hole is formed in the side face of the machine body along the rear of the radiating fin, a drainage cover is arranged at the opening at the rear end of the machine body, a corrugated hose is arranged at the rear end of the drainage cover, and a radiating fan is connected to the end part of the corrugated hose. Preferably, the front of the machine body is provided with a control panel, two sides of the front end of the machine body are symmetrically provided with fixing feet, the fixing feet are provided with fixing holes, and jackscrews are arranged at two sides of the machine body close to the opening at the rear end. Preferably, the radiating fins are formed by processing aluminum, mounting plates are symmetrically arranged on two sides of the radiating fins, a plurality of mounting holes