Novel power supply device for heating silicon molybdenum rod

Abstract

The utility model provides a novel power supply device used for heating a silicon molybdenum rod. The novel power supply device comprises a rectification module, a filtering module, a voltage stabilization module and a control module. The rectifier module is connected with a mains supply input end and is used for converting input alternating current into direct current; the filtering module is connected with the rectification module and is used for eliminating fluctuation in direct current after the rectification module, so that the current is more stable; the voltage stabilizing module is connected with the filtering module and is used for outputting target voltage required by the silicon-molybdenum rod furnace; the control module is connected with the voltage stabilizing module and used for controlling the output voltage of the voltage stabilizing module. The novel power supply device for heating the silicon-molybdenum rod can greatly reduce cost and prolong the service life of the silicon-molybdenum rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to heating silicon molybdenum rod power supply device technical field especially relates to a novel power supply device for heating silicon molybdenum rod. BACKGROUND

[0002] The heating furnace is the equipment that is widely used in laboratory, metallurgical industry, petrochemical industry and various material processing industry, changes its physical and chemical properties through heating material, improves product quality, greatly reduces energy consumption and reduces harmful gas emission compared with traditional fuel heating, brings huge economic and environmental benefits to the country and society, and has a pivotal position in many industries. Silicon molybdenum rod is a kind of resistance heating element made of molybdenum disilicide, and a layer of bright and dense quartz (SiO2) glass glaze layer is generated when it is used at high temperature, which has excellent oxidation resistance, so it is widely used as a heating element in electric furnace equipment such as heating furnace.

[0003] However, the silicon molybdenum rod resistance is very small, and the voltage it can withstand does not exceed 40V, while the voltage of the power grid is 220V or 380V. If the silicon molybdenum rod is directly connected to the 220V or 380V power supply after voltage regulation by using thyristor, according to P=I 2 / R, the current regulation is very rough, and it is difficult to accurately control the power of the heating furnace, so a transformer needs to be added to the circuit to improve the voltage applied to the silicon molybdenum rod and improve the control accuracy of the power, so as to achieve high-precision regulation of the heating temperature. This is also the traditional power supply device used for heating silicon molybdenum rod, which usually uses a 10:1 transformer, that is, the secondary side of the transformer only increases 0.1V for every 1V increase of the primary side, which can achieve the goal of fine power regulation.

[0004] The traditional power supply device uses alternating current to heat the silicon molybdenum rod, although it is relatively mature, but has the following shortcomings: skin effect: high frequency will cause the current to flow mainly on the surface of the silicon molybdenum rod, and the internal heating is uneven; heating uniformity: due to the skin effect and electromagnetic induction, local overheating may occur; energy consumption performance: due to the skin effect and eddy current loss (transformer), the energy efficiency is relatively low; silicon molybdenum rod life: uneven internal heating or local overheating will reduce the service life of the silicon molybdenum rod and increase the use cost; structural complexity: usually includes temperature control instrument, trigger, thyristor, transformer, mutual inductor, voltmeter, ammeter, etc., the structure is relatively complex, and the transformer will greatly increase the quality and volume, which is not conducive to the efficient use of laboratory space; expandability: once the traditional power supply device is designed and assembled, its rated power will be fixed. If the power of the silicon molybdenum rod is increased, a higher power supply device must be designed and assembled to meet the requirements, which is difficult to modify the existing device.

[0005] Therefore, a new type of power supply device for heating silicon molybdenum rod is urgently needed. UTILITY MODEL CONTENT

[0006] In view of the problems existing in the prior art, the utility model provides a novel power supply device for heating silicon molybdenum rod, the device includes rectifier module, filter module, voltage stabilizing module, control module,

[0007] The rectifier module is connected with the mains input end, and is used for converting the input alternating current into direct current.

[0008] The filter module is connected with the rectifier module, and is used for eliminating the fluctuation in the direct current after the rectifier module, so that the current is more stable.

[0009] The voltage stabilizing module is connected with the filter module, and is used for outputting the target voltage required by the silicon molybdenum rod furnace.

[0010] The control module is connected with the voltage stabilizing module, and is used for controlling the output voltage of the voltage stabilizing module.

[0011] As a further description of the utility model, the novel power supply device further includes a thermocouple, the thermocouple is connected with the control module, and is used for detecting the temperature of the silicon molybdenum rod furnace and transmitting the temperature data to the control module; the control module compares the received temperature data with the set target temperature and controls the voltage stabilizing module to output the target voltage required for heating the silicon molybdenum rod furnace.

[0012] As a further description of the utility model, the novel power supply device further includes a potentiometer, the potentiometer is connected with the control module, and is used for adjusting the output voltage of the voltage stabilizing module; in the manual mode, the resistance value of the potentiometer is changed to control the output voltage of the voltage stabilizing module.

[0013] As a further description of the utility model, the novel power supply device further includes a display screen, the display screen is connected with the control module, and is used for displaying the output voltage, current and power of the voltage stabilizing module in real time.

[0014] As a further description of the utility model, the novel power supply device further includes a contactor and a switch, the contactor is connected with the rectifier module, the switch is connected with the contactor, the mains input end is turned on through the switch, when the switch is closed, the contactor is turned on, and the mains input is connected with the rectifier module.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model provides a novel power supply device for heating silicon molybdenum rod, through high -power direct current power replaces traditional silicon controlled rectifier and transformer realizes integration and greatly improves space utilization, saves physical space, through the design of direct current can greatly reduce cost and improve the service life of silicon molybdenum rod, the direct current power supply provided by the utility model can widen the use range through series and parallel connection, and is convenient for maintenance and replacement, maintains the efficient work of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 The novel power supply device for heating silicon molybdenum rod provided by the utility model embodiment structure diagram.

[0018] Fig. 2 The principle diagram of the novel power supply device for heating silicon molybdenum rod provided by the utility model embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0021] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is usually placed, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The technical scheme of the utility model will be explained below in combination with specific embodiments.

[0026] As shown in Figs. 1-2 The utility model provides a novel power supply device for heating silicon molybdenum rod, including rectifier module, filter module, voltage stabilizing module, control module, rectifier module connects commercial power input end, is used for converting the alternating current of input into direct current, filter module is connected with rectifier module, is used for eliminating the fluctuation in direct current after rectifier module, makes the current more stable, voltage stabilizing module is connected with filter module, is used for outputting the target voltage required by silicon molybdenum rod furnace, control module is connected with voltage stabilizing module, is used for controlling the output voltage of voltage stabilizing module.

[0027] The rectifier module, filter module and voltage stabilizing module provided in the embodiment are connected to constitute a high-power direct current power supply system, which is used as a power supply device for heating silicon molybdenum rod, converts the alternating current (AC220V or AC380V) input by commercial power into stable direct current; the rectifier module is the first step of the direct current power supply system, and its purpose is to convert the input alternating current into unidirectional pulsating direct current, which is composed of multiple diodes or other rectifier elements, and the conversion from alternating current to direct current is realized by selectively allowing current to pass through; the filter module is the second step of the direct current power supply system, and its purpose is to eliminate the fluctuation in the current after rectification to make it more stable; the filter module is composed of capacitors and inductors and other elements, which smooth the current through their respective electrical characteristics. After filtering, the quality of the direct current is significantly improved; the voltage stabilizing module is the third step of the direct current power supply system and is also the core part of the direct current power supply system, and its purpose is to ensure the stability of the output voltage. The voltage stabilizing module is composed of multiple electronic elements, and uses a feedback control circuit and a voltage stabilizing circuit to adjust the output voltage. The above are all known technologies and will not be described in detail.

[0028] The novel power supply device further comprises a thermocouple, the thermocouple is connected with the control module; the thermocouple is used for detecting the temperature of the silicon-molybdenum rod furnace and transmitting the detected temperature data to the control module; the control module compares the received temperature data with the set target temperature and controls the voltage stabilizing module to output the target voltage required for heating the silicon-molybdenum rod furnace.

[0029] The control module adopts the existing Yudian AI808 temperature control meter, which can input the temperature data detected by the thermocouple and compare with the set target temperature; if the compared input temperature data is lower than the set target temperature, it indicates that the voltage of the silicon-molybdenum rod furnace needs to be increased to increase the power of the silicon-molybdenum rod furnace, so that the temperature of the silicon-molybdenum rod furnace reaches the target temperature; at this time, the control module outputs a signal to the voltage stabilizing module to increase the voltage, and the voltage stabilizing module outputs the target voltage.

[0030] The thermocouple provided by the embodiment adopts a B-type thermocouple, a C-type thermocouple or an S-type thermocouple; the temperature of the heated silicon-molybdenum rod is generally 1300-1800 DEG C, and different types of thermocouples can be used to detect the furnace temperature of the silicon-molybdenum rod furnace in real time.

[0031] The novel power supply device further comprises a potentiometer, the potentiometer is connected with the control module and is used for adjusting the output voltage of the voltage stabilizing module; in the manual mode, the output voltage of the voltage stabilizing module is controlled by changing the resistance value of the potentiometer; the potentiometer can select an existing rotary potentiometer, a push-pull potentiometer or a straight sliding potentiometer, and the mode is not limited.

[0032] The voltage stabilizing module further outputs the target voltage to the silicon-molybdenum rod furnace, and at the same time, the voltage, current and power output by the voltage stabilizing module are displayed on the display screen in real time; the display screen adopts an LCD liquid crystal screen display.

[0033] The novel power supply device further comprises a serial port and an industrial computer; the control module communicates with the industrial computer through an RS485 serial port and adopts a MODBUS-RTU communication protocol; the control module transmits real-time temperature, voltage and power data to the industrial computer.

[0034] The interface of the novel power supply device is a power input end, an output end of the voltage stabilizing module, a serial port and a thermocouple; when a fault occurs, only one of the power supply devices needs to be replaced and connected to the circuit to enable the silicon-molybdenum rod furnace to work normally; the faulty power supply device can be returned to the maintenance center for repair, which is of great significance to ensure the normal use of the silicon-molybdenum rod furnace.

[0035] When the silicon-molybdenum rod furnace needs more power, multiple novel power supply devices can be connected in parallel; the power input end is connected in parallel to the power supply; the output end of the voltage stabilizing module is connected in parallel to the silicon-molybdenum rod furnace to provide a direct current power supply; and the serial port is connected in parallel to the industrial computer, so as to meet the power supply requirements of different silicon-molybdenum rod furnaces.

[0036] The above embodiments are preferred examples of implementing the present application, and the present application is not limited to the above embodiments. Any non-essential addition or replacement made by a person skilled in the art according to the technical features of the technical scheme of the present application shall fall within the protection scope of the present application.

Claims

1. A new power supply device for heating silicon molybdenum rods, characterized by, The utility model relates to a new type power supply device for silicon-molybdenum rod furnace, which comprises a rectifier module, a filter module, a voltage stabilizing module, a control module, a contactor and a switch. The rectifier module is connected with an input end of commercial power and is used for converting input alternating current into direct current. The filter module is connected with the rectifier module and is used for eliminating fluctuations in direct current after the rectifier module to make the current more stable. The voltage stabilizing module is connected with the filter module and is used for outputting a target voltage required by the silicon-molybdenum rod furnace. The control module is connected with the voltage stabilizing module and is used for controlling the output voltage of the voltage stabilizing module. The new type power supply device further comprises a thermocouple connected with the control module, which is used for detecting the temperature of the silicon-molybdenum rod furnace and transmitting temperature data to the control module; the control module compares the received temperature data with a set target temperature and controls the voltage stabilizing module to output a target voltage required for heating the silicon-molybdenum rod furnace.

2. A novel power supply device for heating a silicon molybdenum rod as claimed in claim 1, wherein, The new type power supply device further comprises a potentiometer connected with the control module, which is used for adjusting the output voltage of the voltage stabilizing module; in a manual mode, the resistance value of the potentiometer is changed to control the output voltage of the voltage stabilizing module.

3. A novel power supply device for heating silicon molybdenum rods as claimed in claim 1, wherein, The new type power supply device further comprises a display screen connected with the control module, which is used for displaying the output voltage, current and power of the voltage stabilizing module in real time.

4. A novel power supply device for heating a silicon molybdenum rod as claimed in claim 1, wherein, The new type power supply device further comprises a contactor connected with the rectifier module and a switch connected with the contactor, which is used for controlling the connection of the input end of commercial power; when the switch is closed, the contactor is connected, and the input end of commercial power is connected with the rectifier module.

5. A novel power supply device for heating silicon molybdenum rods as claimed in claim 1, wherein, ​

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