A six-roller mill purging pipeline pressure monitoring and early warning device

Abstract

The utility model discloses a six roll mill blow -off pipeline pressure monitoring early warning device, including pressure sensor, analog quantity conversion device and control unit, the pressure sensor installs on each blow -off branch pipeline and pre -spray pipeline of six roll mill, and is configured to measure the gas pressure in each blow -off branch pipeline and pre -spray pipeline, and will it output as analog signal, analog quantity conversion device is connected with each pressure sensor and control unit signal respectively, wherein, analog quantity conversion device is configured to convert the analog signal of pressure sensor output into communication signal and convey to control unit, control unit is configured to carry out real -time monitoring to the gas pressure in each blow -off branch pipeline and pre -spray pipeline, and when the pressure is insufficient, alarm. Practical application shows that the utility model data monitoring is reliable, and it is helpful to operator to discover blow -off pipeline pressure anomaly in time, and provides reliable guarantee for the quality of board surface.

Description

Technical Field

[0001] This utility model relates to the field of automated control technology for metallurgical equipment, and in particular to a pressure monitoring and early warning device for the purging pipeline of a six-roll mill. Background Technology

[0002] In the production process of a six-roll mill, the compressed air purging at different locations controls the area of ​​emulsion residue on the sheet surface, preventing emulsion from being carried into the coil core and causing oil coke residue. Therefore, it plays an extremely important role in the sheet surface quality. In the original production line design, the compressed air purging of each branch was only switched on and off based on the real-time production conditions, without real-time monitoring of the pipeline gas pressure. When the pipeline solenoid valve malfunctioned, no purging gas was actually ejected, and the emulsion was carried into the coil core, forming oil coke. This caused batch accidents to the sheet surface quality, which could not be detected in time.

[0003] Therefore, those skilled in the art are dedicated to developing a pressure monitoring and early warning device for the purging pipeline of a six-roll mill to overcome the problems existing in the prior art. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this utility model is how to provide a pressure monitoring and early warning system for rolling mill purging pipelines, which can provide timely warnings when the pressure is insufficient, so as to detect abnormal pressure in the purging pipelines in a timely manner, avoid batch oil coke accidents, and provide reliable protection for plate quality.

[0005] To achieve the above objectives, this utility model provides a pressure monitoring and early warning device for a six-roll mill purging pipeline, comprising: Pressure sensors are installed on each purging branch pipe and pre-spray pipe of the six-roll mill and are configured to measure the gas pressure in each purging branch pipe and pre-spray pipe and output it as an analog signal. An analog-to-analog converter and a control unit, wherein the analog-to-analog converter is connected to each pressure sensor and the control unit respectively; The analog-to-analog converter is configured to convert the analog signal output by the pressure sensor into a communication signal and transmit it to the control unit. The control unit is configured to monitor the gas pressure in each purging branch pipe and pre-spray pipe in real time, and to issue an alarm when the pressure is insufficient.

[0006] Furthermore, the pressure sensor includes an inlet-side pressure sensor and an outlet-side pressure sensor. The inlet-side pressure sensor is installed on the inlet-side guide plate purging pipe, the inlet-side guide plate tail purging pipe, the inlet-side work roller and intermediate roller purging pipe, the inlet-side thickness gauge measurement area purging pipe, the inlet-side steering roller and thickness gauge purging pipe, the inlet-side plate roller and steering roller purging pipe, and the inlet-side pre-spraying pipe. The outlet-side pressure sensor is installed on the outlet-side guide plate purging pipe, the outlet-side guide plate tail purging pipe, the outlet-side work roller and intermediate roller purging pipe, the outlet-side thickness gauge measurement area purging pipe, the outlet-side steering roller and thickness gauge purging pipe, the outlet-side plate roller and steering roller purging pipe, and the outlet-side pre-spraying pipe.

[0007] Furthermore, the analog-to-digital converter is an analog-to-RS485 communication module, which includes an analog input port and an RS485 communication port. The analog input port is connected to each pressure sensor, and the RS485 communication port is connected to the control unit.

[0008] Furthermore, the analog-to-analog converter includes an inlet-side analog-to-analog converter and an outlet-side analog-to-analog converter. The analog input ports of the inlet-side analog-to-analog converter are respectively connected to each inlet-side pressure sensor, and the analog input ports of the outlet-side analog-to-analog converter are respectively connected to each outlet-side pressure sensor.

[0009] Furthermore, the RS485 communication ports of the input-side analog converter and the output-side analog converter are connected to the control unit via an RS485 communication bus.

[0010] Furthermore, it also includes a control power supply module, which includes an AC 220V input power supply, a circuit breaker, a filter, and a DC 24V power supply. The AC 220V input power supply is connected to the input terminal of the DC 24V power supply through the circuit breaker and the filter. The output terminal of the DC 24V power supply is connected to the power supply terminals of each pressure sensor and the analog-to-digital converter.

[0011] Furthermore, the control unit is an industrial control all-in-one computer, and the industrial control all-in-one computer is equipped with Zijinqiao configuration software.

[0012] Furthermore, the control unit includes a data processing module, a variable setting module, a screen configuration module, an alarm setting module, and a trend query module.

[0013] Furthermore, the pressure sensor is an IFM PN2094 pressure sensor with a measurement range of -1 to 10 bar and an analog output of 4 to 20 mA.

[0014] Furthermore, the analog-to-digital converter (ADC) is an Altair DAM-3158A analog-to-digital converter.

[0015] The beneficial effects of this utility model are as follows: Practical applications have shown that the data monitoring of this invention is reliable, which helps operators to detect abnormal pressure in the purging pipeline in a timely manner and provides a reliable guarantee for the quality of the plate surface.

[0016] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the installation position of the pressure sensor inside the rolling mill according to a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the control power supply inside the field acquisition box of a preferred embodiment of this utility model; Figure 3 This is an electrical schematic diagram of the inlet side of the field data acquisition box according to a preferred embodiment of this utility model; Figure 4 This is an electrical schematic diagram of the outlet side of the field acquisition box in a preferred embodiment of this utility model; Figure 5 This is a network communication topology diagram of a preferred embodiment of the present invention.

[0018] Among them, 1-work roll, 2-intermediate roll, 3-support roll, 4-directing roll, 5-plate roll, 6-thickness gauge, 7-steel strip, 8-guide plate, 9-pre-spraying pipe, 10-operator room, 11-industrial control all-in-one computer, 20-data conversion and acquisition box, 21-AC filter, 22-DC 24V power supply, 23-inlet side analog to 485 acquisition module, 24-outlet side analog to 485 acquisition module. Detailed Implementation

[0019] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0020] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0021] This utility model discloses a pressure monitoring and early warning device for the blowing pipeline of a six-roll mill. In response to the problem that the original blowing pipeline had no pressure monitoring, the blowing effect was unpredictable, and the plate quality had uncontrollable risks, a real-time monitoring and early warning system with display, alarm, query and other functions is designed and provided. Example

[0022] This embodiment discloses a pressure monitoring and early warning device for rolling mill purging pipelines. Pressure sensors are installed on the 14 purging branch pipelines of the rolling mill to collect pressure monitoring data locally and transmit it to the control room 10 via 485 communication through an analog-to-digital converter. The control room 10 is equipped with an integrated industrial control computer 11, which uses Zijinqiao software for data processing, variable setting, screen configuration, alarm setting, trend query, etc. The pressure values ​​of the 14 branch pipelines are displayed on the computer screen of the integrated industrial control computer 11 in the form of a rolling mill simulated position diagram. When the pressure is insufficient, an alarm is triggered in time. It has the advantages of being intuitive, convenient and easy to use.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a pressure monitoring and early warning device for rolling mill purging pipeline includes 14 pipeline pressure sensors installed on site, a data conversion and acquisition box 20 installed near the rolling mill site, an RS485 communication bus 30, an operator's room 10, and an industrial control integrated computer 11 (with Zijinqiao configuration software installed for screen configuration).

[0024] In this embodiment, Figure 1 The diagram shows the installation location of the pressure sensor inside the rolling mill. The six-roll mill mainly consists of six work rolls 1 (upper and lower), an intermediate roll 2, and a support roll 3. A guide roll 4, a strip roll 5, and a thickness gauge 6 are respectively installed on the inlet and outlet sides. A protective cover is provided for the thickness gauge 6, and a purging pipe is installed on the cover. The running steel strip 7 passes sequentially through the strip roll 5, guide roll 4, thickness gauge 6, the two work rolls 1 on the inlet side, and the thickness gauge 6, guide roll 4, and strip roll 5 on the outlet side. Guide plates 8 are installed on both sides of the two work rolls 1 to guide the steel strip 7 into and out of the work rolls 1. Pre-spray pipes 9 are installed downstream of the thickness gauge 6 on the inlet side and upstream of the thickness gauge 6 on the outlet side, respectively, to clean, cool, and lubricate the steel strip 7.

[0025] The 14 pressure sensors include an inlet-side pressure sensor and an outlet-side pressure sensor.

[0026] The inlet-side pressure sensors are respectively installed on the inlet-side guide plate purging pipe a, the inlet-side guide plate tail purging pipe b, the inlet-side working roller and intermediate roller purging pipe c, the inlet-side thickness gauge measurement area purging pipe d, the inlet-side steering roller and thickness gauge purging pipe f, the inlet-side plate roller and steering roller purging pipe e, and the inlet-side pre-spray pipe 9.

[0027] The inlet side guide plate purging pipe a, the inlet side guide plate tail purging pipe b, and the inlet side working roller and intermediate roller purging pipe c are controlled by solenoid valve MVRMPP01. The inlet side thickness gauge measurement area purging pipe d and the inlet side steering roller and thickness gauge purging pipe f are controlled by solenoid valve MVRMPP02. The inlet side plate roller and steering roller purging pipe e is controlled by solenoid valve MVRMPP08. The inlet side pre-spraying pipe 9 is controlled by solenoid valve MVR80-01.

[0028] The pressure sensors on the outlet side are respectively installed on the outlet side guide plate purging pipe g, the outlet side guide plate tail purging pipe h, the outlet side working roller and intermediate roller purging pipe j, the outlet side thickness gauge measurement area purging pipe k, the outlet side steering roller and thickness gauge purging pipe n, the outlet side plate roller and steering roller purging pipe m, and the outlet side pre-spraying pipe 9.

[0029] The outlet side guide plate purging pipe g, the outlet side guide plate tail purging pipe h, and the outlet side work roller and intermediate roller purging pipe j are controlled by solenoid valve MVRMPP04. The outlet side thickness gauge measurement area purging pipe k and the outlet side steering roller and thickness gauge purging pipe n are controlled by solenoid valve MVRMPP05. The outlet side plate roller and steering roller purging pipe m is controlled by solenoid valve MVRMPP10. The outlet side pre-spray pipe 9 is controlled by solenoid valve MVR80-02.

[0030] In this embodiment, the pressure sensor is an IFM PN2094 pressure sensor with a measurement range of -1 to 10 bar and an analog output of 4 to 20 mA.

[0031] The on-site local data conversion and acquisition box 20 was designed and manufactured in-house, such as... Figure 2 As shown, the control power supply uses AC220V as the input power. The power supply circuit is equipped with a 2P circuit breaker B1 for power on / off control and overload and short circuit protection. The AC filter 21 supplies power to the DC 24V power supply 22, which provides working power for the analog quantity conversion device and pressure sensor. It is directly connected to terminal blocks TB1 and TB2. Figure 2 I / O 1.0 to I / O 2.7 are the signal output lines of the pressure sensor, which are connected to the corresponding positions of TB1 and TB2 respectively.

[0032] like Figure 3 and Figure 4As shown, the mill inlet-side pressure sensor and outlet-side pressure sensor are connected to IN0~IN7 of the inlet-side analog-to-digital converter 23 and the outlet-side analog-to-digital converter 24 via terminal blocks TB1 and TB2, respectively. The communication addresses of the inlet-side analog-to-digital converter 23 and the outlet-side analog-to-digital converter 24 are 1 and 2, respectively, and the address of each analog channel is assigned as 256~263.

[0033] EPS01~07 are the device numbers corresponding to the inlet-side pressure sensor; EPS08 is reserved for future use. DPS01~07 are the device numbers corresponding to the outlet-side pressure sensor; DPS08 is reserved for future use. Data+ and Data- connect to RS485 communication bus 30. P24 and N24 represent the positive and negative terminals of the DC 24V power supply 22. +24V(BN), SIGN(WH), and 0V(BU) represent the power supply terminal, signal terminal, and ground terminal of the voltage sensor, respectively, with wiring colors of brown, white, and blue.

[0034] like Figure 5 As shown, the RS485 communication ports of the inlet-side analog-to-RS485 acquisition module 23 and the outlet-side analog-to-RS485 acquisition module 24 are connected in parallel in sequence, and are finally introduced into the mill control room 10 and connected to the industrial control computer 11 through the RS485 communication bus 30.

[0035] After the device was put into use, it greatly facilitated the operator's process control and significantly reduced the occurrence of oil coke in the output.

[0036] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A pressure monitoring and early warning device for a six-roll mill purging pipeline, characterized in that, include: Pressure sensors are installed on each purging branch pipe and pre-spray pipe of the six-roll mill and are configured to measure the gas pressure in each purging branch pipe and pre-spray pipe and output it as an analog signal. An analog-to-analog converter and a control unit, wherein the analog-to-analog converter is connected to each pressure sensor and the control unit respectively; The analog-to-analog converter is configured to convert the analog signal output by the pressure sensor into a communication signal and transmit it to the control unit. The control unit is configured to monitor the gas pressure in each branch purging pipe and pre-spraying pipe in real time, and to issue an alarm when the pressure is insufficient.

2. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 1, characterized in that, The pressure sensor includes an inlet-side pressure sensor and an outlet-side pressure sensor. The inlet-side pressure sensor is installed on the inlet-side guide plate purging pipe, the inlet-side guide plate tail purging pipe, the inlet-side work roller and intermediate roller purging pipe, the inlet-side thickness gauge measurement area purging pipe, the inlet-side steering roller and thickness gauge purging pipe, the inlet-side plate roller and steering roller purging pipe, and the inlet-side pre-spraying pipe. The outlet-side pressure sensor is installed on the outlet-side guide plate purging pipe, the outlet-side guide plate tail purging pipe, the outlet-side work roller and intermediate roller purging pipe, the outlet-side thickness gauge measurement area purging pipe, the outlet-side steering roller and thickness gauge purging pipe, the outlet-side plate roller and steering roller purging pipe, and the outlet-side pre-spraying pipe.

3. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 1, characterized in that, The analog-to-digital converter is an analog-to-RS485 communication module, which includes an analog input port and an RS485 communication port. The analog input port is connected to each pressure sensor, and the RS485 communication port is connected to the control unit.

4. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 3, characterized in that, The analog-to-analog converter includes an inlet-side analog-to-analog converter and an outlet-side analog-to-analog converter. The analog input ports of the inlet-side analog-to-analog converter are respectively connected to each inlet-side pressure sensor, and the analog input ports of the outlet-side analog-to-analog converter are respectively connected to each outlet-side pressure sensor.

5. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 4, characterized in that, The RS485 communication ports of the inlet-side analog converter and the outlet-side analog converter are connected to the control unit via an RS485 communication bus.

6. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 1, characterized in that, It also includes a control power supply module, which includes an AC 220V input power supply, a circuit breaker, a filter, and a DC 24V power supply. The AC 220V input power supply is connected to the input terminal of the DC 24V power supply through the circuit breaker and the filter. The output terminal of the DC 24V power supply is connected to the power supply terminals of each pressure sensor and the analog-to-digital converter.

7. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 1, characterized in that, The control unit is an industrial control all-in-one computer, which is equipped with Zijinqiao configuration software.

8. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 7, characterized in that, The control unit includes a data processing module, a variable setting module, a screen configuration module, an alarm setting module, and a trend query module.

9. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 1, characterized in that, The pressure sensor is an IFM PN2094 type pressure sensor with a measurement range of -1 to 10 bar and an analog output of 4 to 20 mA.

10. The pressure monitoring and early warning device for the purging pipeline of a six-roll mill as described in claim 3, characterized in that, The analog-to-485 communication module used is the Altair DAM-3158A analog-to-485 communication module.

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