Anti-interference device for weighing system of self-consuming vacuum furnace

Abstract

The utility model belongs to the technical field of metallurgical production equipment, and particularly relates to an anti-interference device for a weighing system of a vacuum self-consuming furnace, which comprises a weighing sensor, an anti-interference isolator and a display instrument, the signal wire outlet ends A1 and B1 of the weighing sensor are respectively in communication connection with the signal wire inlet ends B2 and A2 of the anti-interference isolator through data transmission cables, and the signal wire outlet ends A1 and B1 of the anti-interference isolator are respectively in communication connection with the display instrument. The data transmission cable is connected with a first isolation capacitor through a wire, the first isolation capacitor is grounded through a wire, signal wire inlet ends A'and B 'of the display instrument are respectively in communication connection with signal wire outlet ends A and B of the weighing sensor, a grounding end GND of the display instrument is connected with a second isolation capacitor through a wire, and the second isolation capacitor is grounded through a wire. The device adopts photoelectric isolation and capacitance filtering technologies, removes electromagnetic interference signals, and ensures normal use of a weighing system.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical production equipment, and particularly relates to an anti-interference device for a weighing system of a vacuum consumable furnace. Background Art

[0002] Vacuum consumable smelting refers to a smelting method in which the molten material serves as one electrode and a water-cooled copper crucible serves as the other electrode under vacuum conditions. An arc is struck between the two electrodes, and the molten material is melted by the high temperature of the arc and drips into the crucible, where it gradually melts and condenses into ingots.

[0003] The weighing system measures the remaining weight of consumable electrodes during the melting process. Working in conjunction with the main control system, it provides real-time monitoring and display of the remaining electrode weight, enabling melting rate control. Furthermore, it provides quantitative control of the melting process, accurately determining the melting progress and whether melting has concluded. It also implements current reduction and compensation according to the process curve settings before the end of melting. Therefore, the stability and accuracy of the weighing system are crucial to the proper operation of consumable furnaces.

[0004] Currently, during the melting process in a vacuum consumable furnace, the melting voltage is typically 25-37V DC and the current is 10-36kA. This creates a strong electromagnetic interference zone around the positive and negative circuits. The furnace structure places the weighing system within this electromagnetic interference zone. However, regardless of whether the weighing system uses analog or digital signals, strong electromagnetic interference can cause interference, resulting in distorted or lost weighing data. Conventional weighing methods are unable to reliably and accurately measure electrode weight.

[0005] Therefore, an anti-interference device for the weighing system of a vacuum consumable furnace is urgently needed to solve the above problems. Utility Model Content

[0006] In response to the above-mentioned defects in the prior art, the utility model provides an anti-interference device for a vacuum consumable furnace weighing system, comprising a weighing sensor arranged on a side close to the vacuum consumable furnace, an instrument control cabinet arranged on a side away from the vacuum consumable furnace, and an anti-interference isolator and a display instrument arranged in the instrument control cabinet, the weighing sensor being provided with signal output terminals A1 and B1, the anti-interference isolator being provided with signal input terminals A2 and B2, and signal output terminals A and B, the signal output terminals A1 and B1 of the weighing sensor being communicatively connected to the signal input terminals B2 and A2 of the anti-interference isolator respectively through data transmission cables, the data transmission cable being connected to a first isolation capacitor through a wire, the first isolation capacitor being grounded through a wire, the display instrument being provided with signal input terminals A' and B', and a ground terminal GND, the signal input terminals A' and B' of the display instrument being communicatively connected to the signal output terminals A and B of the weighing sensor respectively, the ground terminal GND of the display instrument being connected to a second isolation capacitor through a wire, and the second isolation capacitor being grounded through a wire.

[0007] Optionally, the capacitance value of the first isolation capacitor is 0.5-1 μF, and the capacitance value of the second isolation capacitor is 0.05-0.2 μF.

[0008] Optionally, the model of the weighing sensor is SCW615-APMD, the model of the display instrument is IND360, and the model of the anti-interference isolator is GCAN-216.

[0009] Optionally, the instrument control cabinet is further provided with a cooling mechanism for cooling the anti-interference isolator and the display instrument.

[0010] Optionally, the cooling mechanism includes a heat dissipation fan and a main pipe. The heat dissipation fan is fixedly arranged on the outside of one side of the instrument control cabinet. The air outlet end of the heat dissipation fan is connected to the air duct, and the air duct passes through the side wall of the instrument control cabinet and extends inward. The main pipe is arranged in the instrument control cabinet and corresponds to the position of the anti-interference isolator and the display instrument. The main pipe is connected to the air duct. The main pipe is provided with several air outlets facing the anti-interference isolator and the display instrument. A heat dissipation port is provided on the side wall on the other side of the instrument control cabinet.

[0011] Specifically, since the anti-interference isolator does not have a good heat dissipation function, it may cause the equipment to overheat and affect its performance and stability. Therefore, a cooling mechanism is provided to cool the anti-interference isolator and display instrument with air to ensure their normal operation.

[0012] In addition, the anti-interference isolator is a high-performance CAN bus communication isolation module with an integrated 2-way CAN interface, supporting a baud rate range of 10K-500Kbps. The interface electrical isolation protection module prevents damage to the equipment due to instantaneous overcurrent / overvoltage, enhancing the reliability of the system in harsh environments. The specific configuration is as follows:

[0013] (1) 2-way CAN-bus interface;

[0014] (2) Support CAN2.0A and CAN2.0B frame formats, compliant with ISO / DIS11898 standards;

[0015] (3) The CAN-bus communication baud rate is between 10Kbps and 500Kbps;

[0016] (4) Use external power supply (DC9-24V);

[0017] (5) The CAN-bus interface adopts electrical isolation, and the isolation module insulation voltage is DC2500V;

[0018] (6) Add grounding capacitors to the weighing sensor and display instrument to eliminate conducted interference of different frequencies.

[0019] The present invention also includes other components that enable the normal operation of an anti-interference device for a vacuum consumable furnace weighing system, all of which are conventional technical means in the art. Furthermore, any devices or components not specified in the present invention, such as cooling fans, are conventional technical means in the art.

[0020] The working principle and beneficial effects of the present invention are as follows: it utilizes anti-interference suppression technology, processed through filtering and shielding. An anti-interference isolator is added to the data transmission cable, isolating electromagnetic interference signals through photoelectric means, preventing them from interfering with the display instrument. Ground capacitance is added to the sensor and display instrument ends to eliminate conducted interference of different frequencies. The first isolation capacitor eliminates low-frequency, high-energy glitches, while the second isolation capacitor removes high-frequency, low-energy glitches, achieving stable and accurate measurement of electrode weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a circuit schematic diagram of an anti-interference device for a vacuum consumable furnace weighing system provided in an embodiment of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the cooling mechanism of the present utility model. DETAILED DESCRIPTION

[0024] The present invention is described below in conjunction with the accompanying drawings and specific embodiments of the present invention. The description herein is intended only to explain the present invention and is not intended to limit the present invention. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without creative work to all other embodiments obtained based on the embodiments of the present invention shall be included within the scope of protection of the present invention.

[0025] Example

[0026] like Figure 1-2 As shown, the embodiment of the present invention provides an anti-interference device for a vacuum consumable furnace weighing system, comprising a weighing sensor U1 arranged on one side close to the vacuum consumable furnace, an instrument control cabinet 10 arranged on the side away from the vacuum consumable furnace, and an anti-interference isolator U2 and a display instrument U3 arranged in the instrument control cabinet 10. The weighing sensor U1 is provided with signal output terminals A1 and B1, the anti-interference isolator U2 is provided with signal input terminals A2 and B2, and signal output terminals A and B. The signal output terminals A1 and B1 of the weighing sensor U1 are respectively connected to the digital input terminals A1 and B1. The data transmission cable is communicatively connected to the signal input terminals B2 and A2 of the anti-interference isolator U2, the data transmission cable is connected to the first isolation capacitor C1 through a wire, the first isolation capacitor C1 is grounded through a wire, the display instrument U3 is provided with signal input terminals A' and B', and a ground terminal GND, the signal input terminals A' and B' of the display instrument U3 are communicatively connected to the signal output terminals A and B of the weighing sensor U1 respectively, the ground terminal GND of the display instrument U3 is connected to the second isolation capacitor C2 through a wire, and the second isolation capacitor C2 is grounded through a wire.

[0027] The capacitance value of the first isolation capacitor C1 is 1 μF, and the capacitance value of the second isolation capacitor C2 is 0.2 μF. The model of the weighing sensor U1 is SCW615-APMD, the model of the display instrument U3 is IND360, and the model of the anti-interference isolator U2 is GCAN-216.

[0028] In addition, the instrument control cabinet 10 is also provided with a cooling mechanism for cooling the anti-interference isolator U2 and the display instrument U3; the cooling mechanism includes a heat dissipation fan 11 and a main pipe 12. The heat dissipation fan 11 is fixedly arranged on the outside of one side of the instrument control cabinet 10. The air outlet end of the heat dissipation fan 11 is connected to the air duct, and the air duct passes through the side wall of the instrument control cabinet 10 and extends inward. The main pipe 12 is arranged in the instrument control cabinet 10 and corresponds to the position of the anti-interference isolator U2 and the display instrument U3. The main pipe 12 is connected to the air duct. A number of air outlets 13 are provided on the main pipe 12 facing the anti-interference isolator U2 and the display instrument U3. A heat dissipation port 14 is provided on the side wall of the other side of the instrument control cabinet 10.

[0029] It is understandable that since the anti-interference isolator U2 does not have a good heat dissipation function, it may cause the equipment to overheat and affect its performance and stability. Therefore, a cooling mechanism is set to cool the anti-interference isolator U2 and the display instrument U3 by air to ensure their normal operation.

[0030] The working principle and beneficial effects of the present invention are as follows: it adopts anti-interference suppression technology, which is processed by filtering and shielding. An anti-interference isolator U2 is added to the data transmission cable, and the electromagnetic interference signal is isolated by photoelectric means, so that it cannot interfere with the display instrument U3. Capacitors to the ground are added to the weighing sensor U1 and the display instrument U3 to eliminate the conducted interference of different frequencies. The first isolation capacitor C1 eliminates low-frequency, high-energy glitches, and the second isolation capacitor C2 removes high-frequency, low-energy glitches, so as to achieve the purpose of stable and accurate measurement of electrode weight.

[0031] While the embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An anti-interference device for a vacuum consumable furnace weighing system, comprising a weighing sensor disposed on a side close to the vacuum consumable furnace, an instrument control cabinet disposed on a side away from the vacuum consumable furnace, and an anti-interference isolator and a display instrument disposed in the instrument control cabinet, characterized in that: The weighing sensor is provided with signal output terminals A1 and B1, the anti-interference isolator is provided with signal input terminals A2 and B2, and signal output terminals A and B. The signal output terminals A1 and B1 of the weighing sensor are respectively communicated with the signal input terminals B2 and A2 of the anti-interference isolator through data transmission cables. The data transmission cable is connected to a first isolation capacitor through a wire, and the first isolation capacitor is grounded through a wire. The display instrument is provided with signal input terminals A' and B', and a ground terminal GND. The signal input terminals A' and B' of the display instrument are respectively communicated with the signal output terminals A and B of the weighing sensor. The ground terminal GND of the display instrument is connected to a second isolation capacitor through a wire, and the second isolation capacitor is grounded through a wire.

2. The anti-interference device for a vacuum consumable furnace weighing system according to claim 1, characterized in that: The capacitance value of the first isolation capacitor is 0.5-1 μF, and the capacitance value of the second isolation capacitor is 0.05-0.2 μF.

3. The anti-interference device for a vacuum consumable furnace weighing system according to claim 2, characterized in that: The model of the weighing sensor is SCW615-APMD, the model of the display instrument is IND360, and the model of the anti-interference isolator is GCAN-216.

4. The anti-interference device for a vacuum consumable furnace weighing system according to claim 3, characterized in that: The instrument control cabinet is also provided with a cooling mechanism for cooling the anti-interference isolator and display instrument.

5. The anti-interference device for a vacuum consumable furnace weighing system according to claim 4, characterized in that: The cooling mechanism includes a heat dissipation fan and a main pipe. The heat dissipation fan is fixedly arranged on the outside of one side of the instrument control cabinet. The air outlet end of the heat dissipation fan is connected to the air duct, and the air duct passes through the side wall of the instrument control cabinet and extends inward. The main pipe is arranged in the instrument control cabinet and corresponds to the position of the anti-interference isolator and the display instrument. The main pipe is connected to the air duct. Several air outlets are provided on the main pipe. A heat dissipation port is opened on the side wall on the other side of the instrument control cabinet.

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