CN218666297U

CN218666297U - Constant potential rectifier with multiple main rectifier units and one standby rectifier unit capable of being automatically switched

Info

Publication number: CN218666297U
Application number: CN202222671541.XU
Authority: CN
Inventors: 吕强
Original assignee: TIANJIN HARDWARE AUTOMATION TECHNOLOGY CO LTD
Current assignee: TIANJIN HARDWARE AUTOMATION TECHNOLOGY CO LTD
Priority date: 2021-10-14
Filing date: 2022-10-11
Publication date: 2023-03-21
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a many main automatic switch-over potentiostat that is equipped with, including potentiostat primary module, the reserve module of potentiostat, control module and equipment shell, be provided with the multiunit potentiostat primary module in the equipment shell, potentiostat primary module below is provided with the reserve module of potentiostat and control module, and control module is connected with the potentiostat primary module and the reserve module of potentiostat electricity, and control module can be connected the potentiostat primary module with protected the body and switch over to the reserve module of potentiostat and protected the body connection through the relay. The utility model provides a many main automatic switch-over potentiostat that is equipped with, through setting up the reserve module of potentiostat and control module, realized when the potentiostat primary module breaks down automatically with the potentiostat primary module with by the protection body coupling switch over to the reserve module of potentiostat and by the protection body coupling through control module, guaranteed that the protection body can both obtain effective protection constantly.

Description

Constant potential rectifier with multiple main rectifier units and one standby rectifier unit capable of being automatically switched

Technical Field

The utility model relates to a constant potential rectifier technical field specifically is a many owner are equipped with automatic switch-over constant potential rectifier.

Background

The potentiostat is a branch under a rectifier and has the functions of constant potential and constant current. Potentiostatic refers to the feedback of a reference electrode as a constant standard to control the output of the finisher. As long as the amplification factor of the instrument is calculated and designed correctly, the sampling signal characteristic and the input and output characteristics of the instrument have enough linearity and are well adjusted, the potentiostat can make the potential of the electrified point of the protected object consistent with the set control potential within the rated working range, and the error is generally below 5 mV. It is called a potentiostat because of its property of maintaining the potential at the point of energization nearly constant.

The cathodic protection method is an effective method for corrosion protection of gas pipelines, and the potentiostat is a control center and a power supply of a cathodic protection system. The anode cable of the potentiostat is connected with the auxiliary anode, a hemispherical electric field is formed underground after electrification, the cathode is connected to a protected pipeline, the reference electrode binding post is connected with the reference electrode, the reference electrode is buried near the pipeline, the potential of the gas pipeline is measured, and the protection effect is monitored. After the constant potential protection is started, the protection current flows out from the positive electrode of the constant potential instrument, enters the soil through the auxiliary anode, flows onto the pipeline and returns to the negative electrode of the power supply along the cathode lead, thereby playing a role in protecting the pipeline.

In the cathodic protection, the technology of the constant potential rectifier impressed current mode is mature, has low use cost and is widely used. However, the potentiostat equipment is generally installed in an unattended private branch station, and when the equipment fails and cannot continue to work, equipment maintenance personnel cannot timely troubleshoot the equipment failure, so that a protected body cannot be protected within a certain time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a many owner is equipped with automatic switch-over potentiostat, through setting up the reserve module of potentiostat and control module, realized when the potentiostat primary module breaks down automatically with the potentiostat primary module with by the protection body coupling switch over to the reserve module of potentiostat and by the protection body coupling through control module, guaranteed that the protection body can both obtain effective protection constantly.

In order to achieve the above object, the utility model provides a following technical scheme: a multi-master-slave automatic switching potentiostat, comprising: the device comprises a potentiostat main module, a potentiostat standby module, a control module and a device shell, wherein a plurality of groups of potentiostat main modules are arranged in the device shell, the potentiostat standby module and the control module are arranged below the potentiostat main module, the control module is electrically connected with the potentiostat main module and the potentiostat standby module, and the control module can connect the potentiostat main module with a protected body and switch the potentiostat standby module to be connected with the protected body through a relay.

Preferably, the control module comprises: the circuit comprises a circuit switching circuit unit, a communication unit A and a fault identification unit, wherein the output end of the communication unit A is connected with the input end of the fault identification unit, the output end of the fault identification unit is connected with the input end of the circuit switching circuit unit, and the circuit switching circuit unit is used for switching a potentiostat main module and a potentiostat standby module.

Preferably, the potentiostat main module comprises: the power output unit A, the communication unit B and the fault detection unit A, the output end of the power output unit A is connected with the input end of the control module, the output end of the fault detection unit A is connected with the input end of the control module, the input end of the fault detection unit A is connected with the output end of the power output unit A, the output end of the fault detection unit A is connected with the input end of the communication unit B, and the output end of the communication unit B is connected with the input end of the control module.

Preferably, the power output unit A is respectively connected with the potentiostat standby module and the protected body through the control module.

Preferably, the potentiostat backup module comprises: the power output unit B, the communication unit C and the fault detection unit B are connected, the output end of the power output unit B is connected with the input end of the control module, the output end of the fault detection unit B is connected with the input end of the control module, the input end of the fault detection unit B is connected with the output end of the power output unit B, the output end of the fault detection unit B is connected with the input end of the communication unit C, and the output end of the communication unit C is connected with the input end of the control module.

Preferably, the power output unit B is connected with the potentiostat main module and the protected body through the control module, respectively.

Preferably, the potentiostat main modules are connected in parallel in multiple groups.

Preferably, the communication unit a, the communication unit B and the communication unit C are the same components and are used in cooperation with each other.

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

the utility model discloses a set up the reserve module of potentiostat and control module, realized when the potentiostat primary module breaks down automatically with the potentiostat primary module with by the protection body be connected switch over to the reserve module of potentiostat and by the protection body coupling through control module, guaranteed that the protection body can both obtain effective protection constantly.

And a circuit switching circuit unit and a fault identification unit are additionally arranged in the control module, when the fault identification unit detects that a certain potentiostat main module which is participating in protection has a fault and cannot continuously provide protection, the circuit switching circuit unit immediately switches a potentiostat standby module into a circuit which needs to be protected through relay switching to enable a protected body to be continuously protected until the potentiostat module with the fault is repaired or replaced.

Drawings

Fig. 1 is a schematic structural view of a potentiostat with multiple main and backup automatic switching functions according to the present invention;

fig. 2 is a connection block diagram of a first embodiment of the potentiostat with multiple main and standby automatic switching functions according to the present invention;

fig. 3 is a schematic connection diagram of a second embodiment of the potentiostat with multiple main and standby automatic switching functions according to the present invention;

fig. 4 is a schematic diagram of a fault detection of a main potentiostat module and a backup potentiostat module according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of the switching of the main loop inside the control module according to the second embodiment of the present invention.

In the figure: 1. a potentiostat main module; 2. a constant potential rectifier standby module; 3. a control module; 4. an equipment enclosure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is described with reference to fig. 1 and 2:

a multi-master-slave automatic switching potentiostat, comprising: the device comprises a potentiostat main module 1, a potentiostat spare module 2, a control module 3 and a device shell 4, wherein a plurality of groups of potentiostat main modules 1 are arranged in the device shell 4, the potentiostat spare module 2 and the control module 3 are arranged below the potentiostat main module 1, the control module 3 is electrically connected with the potentiostat main module 1 and the potentiostat spare module 2, the control module 3 can connect the potentiostat main module 1 with a protected body and switch the potentiostat main module 1 to the potentiostat spare module 2 through a relay to connect with the protected body, and the setting is such that under normal conditions, when the control module 3 cannot receive a fault signal of the potentiostat main module 1, the control module 3 switches on an output loop of the potentiostat main module 1 with the protected body through a control power output loop switching circuit; when the control module 3 receives a fault signal sent by the potentiostat main module 1, the control module 3 disconnects the potentiostat main module 1 from the power output circuit of the protected object by controlling the power output circuit switching circuit, and connects the output circuit of the potentiostat standby module 2 with the protected object, thereby ensuring that the protected object can be effectively protected when the potentiostat main module 1 fails.

The second embodiment is explained with reference to fig. 3 to 5 on the basis of the first embodiment:

the potentiostat main modules 1 are connected in parallel in multiple groups, specifically are arranged in two groups, are connected with different protected bodies F1 and F2 through a control module D, have the same structure and comprise a power output unit A, a communication unit B and a fault detection unit A; the potentiostat backup module C includes: the protection device comprises a power output unit B, a communication unit C and a fault detection unit B, wherein the output end of the power output unit B is connected with the input end of a control module 3, the output end of the fault detection unit B is connected with the input end of the control module 3, the input end of the fault detection unit B is connected with the output end of the power output unit B, the output end of the fault detection unit B is connected with the input end of the communication unit C, the output end of the communication unit C is connected with the input end of the control module 3, the power output unit B is respectively connected with a potentiostat main module 1 and a protected body through the control module 3, the communication unit A, the communication unit B and the communication unit C are the same elements and are matched with each other for use, and the communication unit A, the communication unit B and the communication unit C use RS232 interfaces and adopt RS232 communication protocols, so that the transmission efficiency is high, and different devices can be conveniently connected for communication.

The potentiostat main module has a fault as follows:

1. the module is continuously operated for a long time, and the internal temperature of the module is too high to trigger the temperature control switch to be switched on.

2. The output circuit of the module is failed or the circuit is aged, so that the power required by the field cannot be output, and the insufficient power is detected through the current transformer and the voltage sensor.

In an embodiment, the fault detection unit a includes a temperature control switch, fig. 4 shows a fault detection principle that a fault signal switch (temperature control switch) in the potentiostat main module a or B detects that the potentiostat main module a or B has a fault and transmits a fault signal (switch signal) to the control module D in a first fault condition, the control module D turns on a corresponding relay after detecting that the potentiostat main module a or B has a fault, controls the potentiostat main module a or B to be disconnected from an energized loop of a protected object through a normally closed contact, and transmits a fault switching signal to the potentiostat standby module C to control the relay in the potentiostat standby module C to be turned on, and further turns on the energized loop of the potentiostat standby module C and the protected object through a normally open contact, thereby realizing switching of the main and standby loops in the fault.

In a third embodiment, in this embodiment, the fault detection unit a includes a current transformer and a voltage sensor, when a second fault condition occurs, the primary potentiostat module a or B transmits a current signal and a voltage signal to the fault identification unit of the control module D through the communication unit, the fault identification unit detects whether power is insufficient according to the received current signal and voltage signal, when power is insufficient, the control module D switches on a corresponding relay through the loop switching unit, controls the primary potentiostat module a or B to be disconnected from the energized loop of the protected object through the normally closed contact, and transmits a fault switching signal to the backup potentiostat module C to control the relay in the backup potentiostat module C to be turned on, and further switches on the energized loop of the backup potentiostat module C and the protected object through the normally open contact, thereby realizing switching of the primary and backup loops during a fault.

The utility model discloses a theory of operation: a plurality of groups of potentiostat main modules 1 are arranged in an equipment shell 4 of the automatic switching potentiostat, potentiostat standby modules 2 and control modules 3 are arranged below the potentiostat main modules 1, the control modules 3 are electrically connected with the potentiostat main modules 1 and the potentiostat standby modules 2, the control modules 3 can connect the potentiostat main modules 1 with a protected body and switch the potentiostat standby modules 2 to the protected body through relays, when a fault recognition unit in the control modules 3 cannot receive fault signals of the potentiostat main modules 1 through a communication unit A, the control modules 3 switch an output loop of the potentiostat main modules 1 with the protected body through a control loop switching circuit unit; when the fault recognition unit in control module 3 received the fault signal that potentiostat primary module 1 sent through communication unit A, control module 3 switched circuit unit through the control loop and disconnects potentiostat primary module 1 with the power output circuit of the protected body to the output circuit of the reserve module of potentiostat 2 and the protected body switch-on, the utility model relates to a rationally, convenient operation can provide cathodic protection uninterruptedly, greatly reduced the non-protection time of the protected body.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A constant potential rectifier with multi-main-standby automatic switching is characterized by comprising: the device comprises a potentiostat main module (1), potentiostat standby modules (2), a control module (3) and a device shell (4), wherein a plurality of groups of potentiostat main modules (1) are arranged in the device shell (4), the potentiostat standby modules (2) and the control module (3) are arranged below the potentiostat main module (1), the control module (3) is electrically connected with the potentiostat main module (1) and the potentiostat standby modules (2), and the control module (3) is used for connecting the potentiostat main module (1) with a protected body and switching the potentiostat standby modules (2) to be connected with the protected body through a relay.

2. A multi-master-slave automatic switching potentiostat according to claim 1, characterized in that the control module (3) comprises: the potentiostat comprises a circuit switching circuit unit, a communication unit A and a fault identification unit, wherein the output end of the communication unit A is connected with the input end of the fault identification unit, the output end of the fault identification unit is connected with the input end of the circuit switching circuit unit, and the circuit switching circuit unit is used for switching a potentiostat main module (1) and a potentiostat standby module (2).

3. A potentiostat with automatic switching from master to slave according to claim 2, characterized in that the potentiostat master module (1) comprises: the power output unit A, the communication unit B and the fault detection unit A, the output end of the power output unit A is connected with the input end of the control module (3), the output end of the fault detection unit A is connected with the input end of the control module (3), the input end of the fault detection unit A is connected with the output end of the power output unit A, the output end of the fault detection unit A is connected with the input end of the communication unit B, and the output end of the communication unit B is connected with the input end of the control module (3).

4. A multi-master-slave automatic switching potentiostat according to claim 3, wherein the power output unit a is connected to the potentiostat backup module (2) and the protected object through the control module (3), respectively.

5. A multi-master-slave automatic switching potentiostat according to claim 4, characterized in that the potentiostat slave module (2) comprises: the power output unit B, the communication unit C and the fault detection unit B, the output end of the power output unit B is connected with the input end of the control module (3), the output end of the fault detection unit B is connected with the input end of the control module (3), the input end of the fault detection unit B is connected with the output end of the power output unit B, the output end of the fault detection unit B is connected with the input end of the communication unit C, and the output end of the communication unit C is connected with the input end of the control module (3).

6. A multi-master-slave automatic switching potentiostat according to claim 5, wherein the power output unit B is connected to the potentiostat master module (1) and the protected body through the control module (3), respectively.

7. A potentiostat with automatic switching of the main and standby modules (1) according to claim 1, characterized in that the potentiostat main modules (1) are in parallel groups.

8. The potentiostat of claim 5, wherein the communication unit A, the communication unit B and the communication unit C are identical elements and are used in cooperation with each other.