On-line monitoring system of strip steel seam welding machine

Abstract

The utility model provides an on-line monitoring system for a strip steel seam welding machine, which relates to the technical field of seam welding machine monitoring and comprises a strip steel seam welding machine which is respectively connected with a voltage collector, a current transformer, a multifunctional ammeter, a thermal resistor, a pressure sensor and a frequency converter. The voltage collector and the current transformer are electrically connected with the multifunctional ammeter. The multifunctional ammeter, the thermal resistor, the pressure sensor and the frequency converter are electrically connected with the PLC. According to the device, through acquisition and analysis of a plurality of data, automatic judgment of various faults such as large welding resistance, abnormal welding pressure and current control loop faults is realized; in addition, collected data are stored in a real-time database and can be used for fault analysis, welding quality tracing and welding process improvement, and the monitoring effect is comprehensive.

Description

Technical Field

[0001] The utility model relates to the technical field of seam welding machine monitoring, in particular to an online monitoring system for a strip steel seam welding machine. Background Art

[0002] In the production units of various strip steels, such as hot-dip galvanizing, cold rolling mills, continuous annealing, color coating and other production lines, in order to ensure the continuity of production, seam welding machines based on the principle of resistance welding are used to connect the two raw steel coils end to end. The welding machine is used frequently, and the welding quality is affected by many factors. When the welding machine fails or the welding quality is unstable, it will have a great impact on the production process and even stop the machine and production.

[0003] At present, the mature welding machine products on the market have an increasingly higher degree of automation, but there are still great deficiencies in terms of welding machine status monitoring and fault analysis. This design provides an online monitoring solution for welding machines. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose an online monitoring system for a strip seam welding machine.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An online monitoring system for a strip seam welder comprises a strip seam welder, wherein a voltage collector, a current transformer, a multifunctional ammeter, a thermal resistor, a pressure sensor and a frequency converter are respectively connected to the strip seam welder, the voltage collector and the current transformer are electrically connected to the multifunctional ammeter, and the multifunctional ammeter, the thermal resistor, the pressure sensor and the frequency converter are electrically connected to a PLC.

[0007] This device collects and analyzes a number of data to automatically determine a variety of faults, such as large welding resistance, abnormal welding pressure, and current control circuit failure. In addition, the collected data is stored in a real-time database, which can be used for fault analysis, welding quality tracing, and welding process improvement, with a comprehensive monitoring effect.

[0008] Furthermore, the strip seam welding machine is also provided with an ultrasonic sensor, which is electrically connected to the PLC.

[0009] The above scheme can further comprehensively control the weld quality of the strip steel after welding through ultrasonic sensors, and the defective rate of the product is greatly reduced.

[0010] Furthermore, the PLC is electrically connected to the display.

[0011] Furthermore, an alarm is provided on the display, and the alarm is electrically connected to the PLC.

[0012] The above scheme can transmit the monitoring data of several electrical components to the PLC and display them intuitively through the display. If any indicator fails, it will immediately trigger an alarm signal for quick warning, making it convenient for staff to carry out maintenance to avoid adverse consequences caused by long-term failures.

[0013] Furthermore, the current transformer includes two current transformers, and the two current transformers respectively measure the primary power supply side current and the secondary transformer output side current.

[0014] Furthermore, a wastewater collection box is slidably fitted below the strip seam welding machine, and a filter screen is movably connected in the wastewater collection box.

[0015] The above scheme collects the cooling waste water generated during the welding process in time through the waste water collection box. At the same time, the filter can effectively separate water from impurities. The waste water collection box is pulled to the lower side of the strip seam welding machine to replace the filter at regular intervals.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] Compared with the existing technology, this device realizes automatic judgment of various faults such as large welding resistance, abnormal welding pressure, current control circuit failure, etc. by collecting and analyzing multiple data such as current, voltage, ambient temperature, welding wheel rolling pressure and welding wheel travel speed during the operation of the strip seam welding machine; in addition, the collected data are stored in the real-time database, which can be used for fault analysis, welding quality tracing and welding process improvement, and the monitoring effect is comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 Installation diagram for wastewater collection tank

[0020] Reference numerals:

[0021] 1. Strip seam welding machine; 2. Voltage collector; 3. Current transformer; 4. Multi-function electric meter; 5. Thermal resistor; 6. Pressure sensor; 7. Frequency converter; 8. Ultrasonic sensor; 9. PLC; 10. Display; 11. Wastewater collection box; 12. Filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:

[0023] like Figure 1 As shown, an online monitoring system for a strip seam welder includes a strip seam welder 1, to which a voltage collector 2, a current transformer 3, a multi-function ammeter 4, a thermal resistor 5, a pressure sensor 6 and a frequency converter 7 are respectively connected, the voltage collector 2 and the current transformer 3 are electrically connected to the multi-function ammeter 4, and the multi-function ammeter 4, the thermal resistor 5, the pressure sensor 6 and the frequency converter 7 are electrically connected to a PLC 9.

[0024] Further refinement of the embodiment of the present utility model is as follows: Figure 1 As shown, the current transformer 3 includes two current transformers, and the two current transformers 3 respectively measure the primary power supply side current and the secondary transformer output side current.

[0025] The workflow of this utility model:

[0026] Firstly, the current transformer 3, the voltage collector 2 and the multi-function electric meter 4 are used to collect the welding voltage and current; secondly, the thermal resistor 5 is used to detect the ambient temperature; and the pressure sensor 6 is used to detect the pressure of the welding wheel rolling the strip steel; these electrical components can communicate with the PLC 9 to collect the work flow of the welding machine, and the frequency converter 7 is also added to communicate to detect the welding speed of the welding wheel;

[0027] Compared with the prior art, the device realizes automatic judgment of various faults such as large welding resistance, abnormal welding pressure, and current control circuit failure by collecting and analyzing multiple data such as current, voltage, ambient temperature, welding wheel rolling pressure, and welding wheel travel speed during the operation of the strip seam welder 1; in addition, the collected data are stored in a real-time database, which can be used for fault analysis, welding quality tracing, and improvement of welding technology.

[0028] There are two current transformers 3, one for the primary power supply side current and the other for the secondary transformer output side current. The voltage collector 2 is directly connected to the welding wheel connecting copper busbar for voltage detection.

[0029] In some embodiments, Figure 1As shown, the strip seam welding machine 1 is also provided with an ultrasonic sensor 8, and the ultrasonic sensor 8 is electrically connected to the PLC 9; this embodiment can further comprehensively control the weld quality after the strip welding is completed through the ultrasonic sensor 8, and the defective rate of the product is greatly reduced.

[0030] In other embodiments, Figure 1 As shown, PLC9 is electrically connected to the display 10 and an alarm is provided on the display 10. The alarm is not shown in the figure. The alarm is electrically connected to PLC9. This embodiment can transmit monitoring data from several electrical components to the inside of PLC9 and display them intuitively through the display 10. If any of the indicators fails, an alarm signal is immediately triggered for a quick warning, thereby facilitating maintenance by staff to avoid adverse consequences caused by long-term failures.

[0031] Further optimization of the process of the utility model, such as Figure 2 As shown, a wastewater collection box 11 is slidably fitted under the strip seam welding machine 1, and a filter screen 12 is movably connected to the wastewater collection box 11; the cooling wastewater generated during the welding process is collected in time by the wastewater collection box 11, and the filter screen 12 can effectively separate water and impurities. The wastewater collection box 11 is pulled to the lower side of the strip seam welding machine 1 at regular intervals to replace the filter screen 12. Furthermore, a drain pipe is obliquely arranged at the bottom of the wastewater collection box, and the drain pipe is connected to a suction pump for automatic transfer of water to prevent water in the wastewater collection box from overflowing. The suction pump is not shown in the figure, and the drain pipe is shown in the figure without a number.

[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. An online monitoring system for a strip seam welder, comprising a strip seam welder (1), characterized in that: The strip seam welding machine (1) is respectively connected with a voltage collector (2), a current transformer (3), a multifunctional electric meter (4), a thermal resistor (5), a pressure sensor (6) and a frequency converter (7); the voltage collector (2) and the current transformer (3) are electrically connected to the multifunctional electric meter (4); the multifunctional electric meter (4), the thermal resistor (5), the pressure sensor (6) and the frequency converter (7) are electrically connected to a PLC (9).

2. The online monitoring system for a strip seam welder according to claim 1 is characterized in that: The strip steel seam welding machine (1) is also provided with an ultrasonic sensor (8), and the ultrasonic sensor (8) is electrically connected to the PLC (9).

3. The online monitoring system for a strip seam welder according to claim 1 is characterized in that: The PLC (9) and the display (10) are electrically connected.

4. The online monitoring system for a strip seam welder according to claim 3 is characterized in that: The display (10) is provided with an alarm, and the alarm is electrically connected to the PLC (9).

5. The online monitoring system for a strip seam welder according to claim 1 is characterized in that: The current transformer (3) comprises two current transformers (3), and the two current transformers (3) respectively measure the current on the primary power supply side and the current on the secondary transformer output side.

6. The online monitoring system for a strip seam welder according to claim 1 is characterized in that: A wastewater collection box (11) is slidably fitted below the strip steel seam welding machine (1), and a filter screen (12) is movably connected to the wastewater collection box (11).

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