CN217332787U

CN217332787U - Electric leakage monitoring circuit of yellow phosphorus electric furnace system

Info

Publication number: CN217332787U
Application number: CN202122614891.8U
Authority: CN
Inventors: 李英伟; 王庆如; 郭洋
Original assignee: Sinopec Engineering Group Co Ltd; Sinopec Nanjing Engineering Co Ltd
Current assignee: Sinopec Engineering Group Co Ltd; Sinopec Nanjing Engineering Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-08-30
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a leakage monitoring circuit of yellow phosphorus electric stove system, it includes the monitoring circuit of the leakage current in the cooling water pipe its characterized in that to reach the monitoring circuit of insulating properties between electrode holder and the electric stove metal top cap. The leakage current monitoring facility is arranged on the yellow phosphorus short net cooling water pipe, so that the leakage current of the short net cooling water system is monitored in real time, and the running safety of the yellow phosphorus short net system is guaranteed; through set up insulating monitoring facilities between electrode holder and electric stove metal top cap, the insulating properties between real-time supervision holder (electrode) and the electric stove metal top cap can provide the guarantee for the safe and economic operation of yellow phosphorus electrode.

Description

Electric leakage monitoring circuit of yellow phosphorus electric furnace system

Technical Field

The utility model belongs to the technical field of electrical design and installation, concretely relates to electric leakage monitoring circuit of yellow phosphorus electric stove system.

Background

The operating temperature of a short network system (comprising an electrode holder, a water-cooled cable and the like) is generally reduced in a short network bus (hereinafter referred to as a short network) of the yellow phosphorus electric furnace by an internal circulating cooling water mode. The circulating cooling water is connected with an external circulating cooling water system through a cooling water pipe joint preset on the short net. In order to avoid the electric leakage of large current caused by the power system passing through the circulating cooling water system, the cooling water is generally connected with the heat exchanger by adopting desalted water and an insulating rubber tube. Due to possible water quality deterioration (resulting in conductivity increase) in the operation process, the leakage current of the short net through the cooling water pipeline is possibly increased, and similar personal injury accidents often occur in actual production. Therefore, the system for monitoring and alarming the leakage of the circulating cooling water system in real time can provide guarantee for the safe operation of the short network.

In addition to the potential leakage of the cooling water of the short mesh, the electric furnace system also has an area which is very easy to generate the potential leakage, namely the leakage between the graphite electrode and the metal sealing cover of the electric furnace. The leakage in this area is very difficult to monitor, and once leakage occurs, the metal sealing cover may be damaged by temperature rise, electrode sealing materials are damaged, and energy consumption is increased. Therefore, the system for monitoring and alarming the electric leakage between the electrode and the electric furnace top cover in real time can provide guarantee for the safe and economic operation of the electric furnace system.

SUMMERY OF THE UTILITY MODEL

The utility model provides a yellow phosphorus electric stove system's electric leakage monitoring circuit to the problem that exists among the background art. Two functions can be implemented. The first function is: and carrying out real-time electric leakage monitoring and alarming on the electric furnace short-net circulating cooling water system. The second function is: and carrying out real-time electric leakage monitoring and alarming between the electrode and the electric furnace top cover.

The technical scheme is as follows:

the leakage monitoring circuit of the yellow phosphorus electric furnace system comprises a leakage current monitoring circuit in a cooling water pipe and an insulating performance monitoring circuit between an electrode holder and a metal top cover of the electric furnace.

S1: each cooling water pipe of the short net is provided with a core type current transformer for monitoring the leakage current in the cooling water pipe in real time;

s2: connecting the secondary side of the core-through current transformer with a current monitoring instrument (such as a digital ammeter) as shown in fig. 2, so that the leakage current value of each cooling water pipe can be monitored in real time;

s3: furthermore, an alarm upper limit value can be set on the current monitoring instrument, and when the leakage current value exceeds the alarm upper limit value, an alarm signal can be sent out.

S4: each electrode holder is provided with a voltage sampling binding post; arranging a voltage sampling wiring terminal on a metal top cover of the electric furnace, wherein the metal top cover of the electric furnace is grounded in advance;

s5: connecting the voltage sampling terminal on the clamper with the primary side of an external Y0/Y0 wired voltage transformer (PT) as shown in FIG. 3;

s6: neutral points of a primary side and a secondary side of a voltage transformer (PT) are directly connected with a voltage wiring terminal of the metal top cover of the electric furnace;

s7: the secondary side of the voltage transformer (PT) is connected with a voltage monitoring instrument (such as a digital voltmeter), so that the insulating property between each electrode holder (electrode) and the metal top cover of the electric furnace can be monitored in real time.

S8: furthermore, an alarm upper limit value can be set on the voltage monitoring instrument, and when the alarm upper limit value is exceeded, an alarm signal can be sent out.

The beneficial effects of the utility model

The leakage current monitoring facility is arranged on the yellow phosphorus short net cooling water pipe, so that the leakage current of the short net cooling water system is monitored in real time, and the running safety of the yellow phosphorus short net system is guaranteed; through set up insulating monitoring facilities between electrode holder and electric stove metal top cap, the insulating properties between real-time supervision holder (electrode) and the electric stove metal top cap can provide the guarantee for the safe and economic operation of yellow phosphorus electrode.

Drawings

FIG. 1 is a schematic view of leakage monitoring connection of a yellow phosphorus electric furnace system with three electrodes as an example

FIG. 2 is an equivalent diagram of leakage monitoring of cooling water pipes of a yellow phosphorus short net using three cooling water pipes as an example

FIG. 3 is an equivalent diagram of leakage monitoring between an electrode and a top cover of a yellow phosphorus electric furnace, taking three electrode holders as an example

Detailed Description

The present invention will be further explained with reference to the following examples, but the scope of the present invention is not limited thereto:

referring to fig. 1, the leakage monitoring circuit of the yellow phosphorus electric furnace system comprises a leakage current monitoring circuit in a cooling water pipe and an insulation performance monitoring circuit between an electrode holder and a metal top cover of the electric furnace.

The monitoring circuit of the leakage current in the cooling water pipe is specifically: each cooling water pipe 1 of the system is provided with a core-through current transformer 2, and the secondary side of the core-through current transformer 2 is connected with a current monitoring instrument 3.

In a preferred embodiment, an alarm upper limit value is set on the current monitoring instrument, and when the leakage current value exceeds the alarm upper limit value, an alarm signal is sent out.

The circuit for monitoring the insulation performance between the electrode holder and the metal top cover of the electric furnace is specifically as follows: each electrode holder 6 is provided with a voltage sampling terminal, the metal top cover 4 of the electric furnace is provided with a voltage sampling terminal, and the metal top cover 4 of the electric furnace is grounded in advance; the voltage sampling terminal of the electrode holder is connected with the primary side of an external voltage transformer 5; the neutral points of the primary side and the secondary side of the voltage transformer 5 are directly connected with the voltage wiring terminal of the metal top cover 4 of the electric furnace; the secondary side of the voltage transformer 5 is connected with a voltage monitoring instrument 7.

In a preferred embodiment, an alarm upper limit value is set on the voltage monitoring instrument, and when the voltage exceeds the alarm upper limit value, an alarm signal is sent out.

In the preferred embodiment, the voltage transformer is a Y0/Y0 type connection.

In a preferred embodiment, the voltage transformer is a digital voltmeter.

In conclusion, the utility model has the advantages that the leakage current monitoring facility is arranged on the yellow phosphorus short net cooling water pipe, so that the leakage current of the short net cooling water system can be monitored in real time, and the operation safety of the yellow phosphorus short net system is guaranteed; through set up insulating monitoring facilities between electrode holder and electric stove metal top cap, the insulating properties between real-time supervision holder (electrode) and the electric stove metal top cap can provide the guarantee for the safe and economic operation of yellow phosphorus electrode.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The electric leakage monitoring circuit of a yellow phosphorus electric furnace system is characterized by comprising a monitoring circuit of electric leakage current in a cooling water pipe and a monitoring circuit of insulating property between an electrode holder and a metal top cover of an electric furnace;

the monitoring circuit of the leakage current in the cooling water pipe is specifically as follows: each cooling water pipe of the system is provided with a core-through current transformer, and the secondary side of the core-through current transformer is connected with a current monitoring instrument;

the circuit for monitoring the insulating property between the electrode holder and the metal top cover of the electric furnace specifically comprises: each electrode holder is provided with a voltage sampling binding post, the metal top cover of the electric furnace is provided with a voltage sampling binding post, and the metal top cover of the electric furnace is grounded in advance; the voltage sampling binding post of the electrode holder is connected with the primary side of an external voltage transformer; the neutral points of the primary side and the secondary side of the voltage transformer are directly connected with the voltage wiring terminal of the metal top cover of the electric furnace; and the secondary side of the voltage transformer is connected with a voltage monitoring instrument.

2. The leakage current monitoring circuit of the yellow phosphorus electric furnace system as claimed in claim 1, wherein an alarm upper limit value is set on the current monitoring instrument, and when the leakage current value exceeds the alarm upper limit value, an alarm signal is sent out.

3. The electric leakage monitoring circuit of the yellow phosphorus electric furnace system according to claim 1, wherein an alarm upper limit value is set on the voltage monitoring instrument, and when the voltage exceeds the alarm upper limit value, an alarm signal is sent out.

4. The electric leakage monitoring circuit for the yellow phosphorus electric furnace system as claimed in claim 1, wherein the voltage transformer is a Y0/Y0 type wire.

5. The electric leakage monitoring circuit for the yellow phosphorus electric furnace system according to claim 1, wherein the voltage transformer is a digital voltmeter.