CN111774182A

CN111774182A - Electric precipitator overhauls safety interlock system

Info

Publication number: CN111774182A
Application number: CN202010741858.9A
Authority: CN
Inventors: 李林
Original assignee: Qingdao Dingxin Industrial Safety Equipment Co ltd
Current assignee: Qingdao Dingxin Industrial Safety Equipment Co ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2020-10-16

Abstract

The invention discloses a maintenance safety interlocking system of an electric dust collector, which comprises the following steps: s1: the operation input, the worker disconnects the high-frequency power supply 1, extracts the key 1A inserted on the high-frequency power supply 1, and locks the switch at the disconnection position; s2: inserting the key 1A into a hole 1A of an isolating switch box 1 of the high-frequency power supply 1, driving the hole to a grounding position, and inserting the key 1A2 and the key 1A3 into the isolating switch box 1; s3: the key 1a2 is removed and inserted into the key exchange device X; the invention ensures the possibility of no misoperation by adopting the logic compulsory of mechanical safety interlock, avoids the error of artificial judgment, has the advantages of compulsory and logical properties compared with the detection and switching of the original independent module and the operation by the subjective judgment of people, and combines the safety interlock with the electrical control to ensure that the safety of people is not violated.

Description

Electric precipitator overhauls safety interlock system

Technical Field

The invention particularly relates to the technical field of electric appliance overhauling methods, in particular to an electric precipitator overhauling safety interlocking system.

Background

Electrostatic dust removal, referred to as "electric dust removal" for short, is the use of the property of electrostatic attraction of small and light objects to adsorb industrial dust by static electricity. The working principle of the electrostatic dust collector is that a high-voltage electric field is utilized to ionize smoke, and dust charges in airflow are separated from the airflow under the action of the electric field. The performance of an electrostatic precipitator is influenced by three factors, namely the nature of the dust, the equipment construction and the flow rate of the flue gas. The specific resistance of the dust is an index for evaluating the conductivity, and has a direct influence on the dust removal efficiency. The specific resistance is too low, and dust particles are difficult to retain on the dust collecting electrode, so that they are returned to the air flow. The specific resistance is too high, the dust particle charges reaching the dust collecting electrode are not easy to discharge, and the local breakdown and discharge phenomena are generated by forming a voltage gradient between dust layers. These conditions all cause a decrease in the dust removal efficiency, and therefore, the electrostatic precipitator needs to be overhauled once a year.

However, the existing maintenance methods have disadvantages, and the life safety of workers is affected if the safety of the maintenance environment cannot be guaranteed, so that a maintenance method capable of guaranteeing the safety of the maintenance environment is needed.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a maintenance safety interlocking system for an electric dust collector.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric dust collector maintenance safety interlock system comprises the following steps:

s1: the operation input, the worker disconnects the high-frequency power supply 1, extracts the key 1A inserted on the high-frequency power supply 1, and locks the switch at the disconnection position;

s2: inserting the key 1A into a hole 1A of an isolating switch box 1 of the high-frequency power supply 1, driving the hole to a grounding position, and inserting the key 1A2 and the key 1A3 into the isolating switch box 1;

s3: the key 1A2 is pulled out and inserted into the key exchange device X, the key 1A3 is pulled out and inserted into a door lock hole of the isolating switch box 1, and the key 1A3 is rotated to open the box door of the isolating switch box 1;

s4: repeating the operations of S1-S3 to process all high-frequency power supplies;

s5: opening a plurality of access doors for maintenance by using a plurality of exchanged access door keys;

s6: after the maintenance is finished, closing the door lock and pulling out a key of the maintenance door;

s7: put into operation, reverse operation S1-S6 process.

Further, in the process of S2, the key 1A is inserted into the hole 1A of the disconnecting switch case 1 and cannot be removed after being turned to the grounding position.

Further, in the process of S2, the key 1A is inserted into the hole 1A of the disconnecting switch box 1, and the key 1A2 and the key 1A3 can be pulled out after the key 1A is hit to the grounding position.

Further, in S4, the number of the high frequency power supplies is at least 2.

Further, in the S5 process, the access door key cannot be pulled out after the access door is opened.

The invention has the beneficial effects that:

1. the possibility of misoperation is ensured to be absent through logical mandatory of mechanical safety interlocking, errors of artificial judgment are avoided, compared with detection and switching of an original independent module and operation by means of subjective judgment of people, the method has the advantages of mandatory and logical, safety interlocking and electrical control are combined, and safety of people is guaranteed against infringement.

2. This system is through combining together electrical switch, safety interlock, realizes surveying insulating personnel's essential safety, ensures that all power knife switches all break off can get into the maintenance space, and gets into before the manhole door does not close in the maintenance space of back, and all power and banisters can't be opened, ensure personnel's safety.

Drawings

FIG. 1 is a schematic view of a flow structure of an electric precipitator overhaul safety interlock system according to the present invention;

FIG. 2 is a schematic structural view of a key exchange device X of an electric dust collector overhaul safety interlock system provided by the invention;

FIG. 3 is a schematic structural diagram of a key exchange device X of an electric dust collector overhaul safety interlock system according to the present invention;

fig. 4 is a schematic structural diagram of a control principle of the electric dust collector overhaul safety interlock system provided by the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. It should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and their meaning in the context of this patent may be understood by those skilled in the art as appropriate.

Referring to fig. 1-4, an electrostatic precipitator overhauls safety interlock system, includes the following steps:

s2: inserting the key 1A into a hole 1A of an isolating switch box 1 of the high-frequency power supply 1, and striking the hole to a grounding position, wherein the key 1A cannot be pulled out;

the isolating switch box 1 is originally inserted with a key 1A2 and a key 1A 3; in addition, the key 1A2 and the key 1A3 can be pulled out only after the key 1A is inserted into the hole 1A of the isolating switch box 1 and is turned to the grounding position;

s4: repeating the operations of S1-S3 to process all high-frequency power supplies; it should be noted that the number of high frequency power supplies is at least 2;

s5: opening a plurality of access doors for maintenance by using a plurality of exchanged access door keys; the access door key cannot be pulled out after the access door is opened;

s7: put into operation, reverse operation S1-S6 process.

The working principle of the embodiment is as follows: when the device is used, a worker disconnects the high-frequency power supply 1, extracts the key 1A inserted on the high-frequency power supply 1, locks a switch at an open position, extracts the key 1A2 and the key 1A3 on the isolating switch box 1, inserts the extracted key 1A2 into the key exchange device X, inserts the extracted key 1A3 into a door lock hole of the isolating switch box 1, rotates the key 1A3 to open a box door of the isolating switch box 1, repeats the operations of S1-S3, processes all high-frequency power supplies, opens a plurality of access doors for maintenance by using a plurality of exchanged access door keys, closes the door lock after maintenance is finished, extracts the access door keys, and reversely operates the processes of S1-S6 to enable the device to be put into operation again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An electric dust collector maintenance safety interlock system comprises the following steps:

s7: put into operation, reverse operation S1-S6 process.

2. The electric dust collector overhaul safety interlock system as claimed in claim 1, wherein: in the process of S2, the key 1A is inserted into the hole 1A of the disconnecting switch case 1 and cannot be pulled out after being turned to the grounding position.

3. The electric dust collector overhaul safety interlock system as claimed in claim 1, wherein: in the process of S2, the key 1A is inserted into the hole 1A of the isolating switch box 1, and the key 1A2 and the key 1A3 can be pulled out after the key 1A is driven to the grounding position.

4. The electric dust collector overhaul safety interlock system as claimed in claim 1, wherein: in S4, the number of the high frequency power supplies is at least 2.

5. The electric dust collector overhaul safety interlock system as claimed in claim 1, wherein: in the process of S5, the access door key can not be pulled out after the access door is opened.