一、设备概述和用途：

本设备适用于在氢气下利用中频感应加热原理进行金属热处理的现代化设备。本产品加热是一种交一直一交静止变频装置，它将50Hz三相工频电能转换成单相中频电能。该系列设备应用电磁感应原理，在保护气体环境下置工件于交变磁场中，产生涡流损耗而发热，达到烧结、透热等加热的要求。这种加热方式，具有加热快、烧损少、劳动强度低，能确保产品质量。

四、主要技术参数：

a) 额定工作电源              3N  380V±20V，50Hz±1Hz

b) 额定加热功率               约500kw(实际加热功率无级可调)

c) 额定工作炉温               2350℃（设计炉温2400℃）

d) 升温速率                     ≤ 20℃/min   

e) 仪表控温精度               ≤±2℃   

f) 测温方式           0-1000℃  热电偶（自动送出式）1000-2500℃红外

g) 控温方式：        手动控制及智能化程序控制（按给定升温曲线升温）

h) 温度记录：        小长图记录仪记录温度及工控电脑数据记录

i) 工作气氛：       氢气（氢气流量不小于20m³/h，压力不小于0.04MPa。）

j) 保护气氛：             氮气 （压力0.04MPa）

k) 高温区有效尺寸：           Ф600×1500

l) 发热体规格                 Ф600×1500（钨）

m) 炉体型式                   立式

n) 出料方式：                 上出料

o) 真空抽速                    ≤0.5小时

p) 空炉冷态极限真空度          ≤ 10Pa

q) 压升率                     ≤0.67 Pa/h

r) 炉体外表面温升             ≤30℃

s) 冷却水额定压力              0.1~0.3M Pa

t) 冷却水流量：               约15 m³/h

u) 压缩空气的压力            0.4-0.6 MPa 

v) 中频加热参数：  

l 中频电源频率     2500HZ

l 整流方式：三相全控桥整流

l 额定直流电压：  510V

l 额定直流电流：  500A

l 额定输出电压：  750V-800V

l 额定功率：      500KW

l 效率:          ≥92%

l 控制方式：数字集成电路控制。

l 触发脉冲：双窄列脉冲。

保护方式：

l 过流、过压整流拉逆变保护；

l 截流、功率封锁保护

l 继电保护；RC、LC吸收保护

l 快速熔断器保护

l 炉温超温、超调保护，测温传感器故障保护

l 系统欠水、缺水、水温超温及水压超高保护

l 保护气体欠流量保护

功率调节方式：

l 手动方式；

l PID调节，沿指定升温曲线自动工作方式(用户指定)。

五、原理，结构及特点

本设备由炉体、真空获得系统、电气控制系统、真空控制系统、中频加热系统，充气系统，水冷系统等部分组成。本设备是利用中频感应加热的热处理设备，炉体内部设有一只螺旋型管式线圈，当线圈通以中频电流时，则产生交变磁场。金属炉料在磁场作用下，感应出电势，产生环形电流，这种电流在本身的磁场作用下，集中在金属炉料的外层，使外层金属炉料具有很高的电流密度，从而产生集中而强大的热效应，已致把金属加热，使炉内产生高达2400℃的高温。

Hydrogen sintering furnace (upper discharge structure)

Upper discharge hydrogen high temperature sintering furnace

Hydrogen medium frequency induction heating sintering furnace

First, equipment overview and use:

This equipment is suitable for modern equipment for metal heat treatment under the principle of medium frequency induction heating under hydrogen. This product heating is a kind of static and constant frequency conversion device, which converts 50H z three-phase power frequency electric energy into single-phase intermediate frequency electric energy. This series of equipment applies the principle of electromagnetic induction. Under the protective gas environment, the workpiece is placed in an alternating magnetic field, which generates eddy current loss and generates heat, which meets the requirements of heating such as sintering and heat transmission. This heating method has the advantages of fast heating, less burning loss and low labor intensity, which can ensure product quality.

Fourth , the main technical parameters:

a)    Rated working power supply 3N 380V ± 20V , 50H z ± 1 Hz

b) Rated heating power is about 500kw (the actual heating power is steplessly adjustable )

c)Rated working furnace temperature 2350 °C (design furnace temperature 2400 °C)

d)     Heating rate ≤ 20 °C / min

e)      Instrument temperature control accuracy ≤ ± 2 ° C   

f) Thermometry 0-1000 °C thermocouple (automatic delivery) 1000-2500 °C infrared

g)    Temperature control method:  Manual control and intelligent program control (heating according to a given temperature rise curve)

h)    Temperature record: Small long chart recorder records temperature and industrial computer data record

i)  Working atmosphere: Hydrogen (hydrogen flow rate is not less than 20 m 3 /h , pressure is not less than 0. 0 4 M P a .)

j)           Protective atmosphere: nitrogen ( pressure 0.04MPa )

k)         Effective size in high temperature zone: Ф600×1500

l)           Heating element size Ф600×1500 (tungsten)

m)      Furnace type vertical

n)        Discharge method: upper discharge

o)         Vacuum pumping speed ≤ 0.5 hours

p)        Empty furnace cold state ultimate vacuum ≤ 10Pa

q)         Pressure rise rate ≤ 0.67 Pa/h

r)          Furnace surface temperature rise ≤ 30 °C

s)          Cooling water rated pressure 0.1~0.3M Pa

t)          Cooling water flow: approx. 15 m 3 /h

u)        Compressed air pressure 0.4-0.6 MPa

v)         Medium frequency heating parameters:

1   IF power frequency 2500HZ

2 Rectification mode: three-phase full control bridge rectification

3        Rated DC voltage: 510V

4      DC Current Rating: 500A

5        Rated output voltage: 750V-800V

6     Rated power: 500KW

7         Efficiency: ≥92%

8         Control method: digital integrated circuit control.

9        Trigger pulse: double narrow column pulse.

Protection method:

10         Overcurrent, overvoltage rectification pull inverter protection;

11         Shutoff, power blocking protection

12         Relay protection; RC , LC absorption protection

13         Fast fuse protection

14          Furnace temperature over temperature, overshoot protection, temperature sensor fault protection

15          System under water, water shortage, water temperature over temperature and water pressure ultra high protection

16          Protective gas underflow protection

Power adjustment mode:

17          Manual mode

18          PID adjustment, automatic working mode along the specified heating curve ( user specified ) .

Fifth, the principle, structure and characteristics

The equipment consists of a furnace body, a vacuum obtaining system, an electric control system, a vacuum control system, an intermediate frequency heating system, an aeration system, and a water cooling system. The device is a heat treatment device using medium frequency induction heating. The inside of the furnace body is provided with a spiral tube coil. When the coil is connected with an intermediate frequency current, an alternating magnetic field is generated. The metal charge induces an electric potential under the action of a magnetic field to generate a toroidal current. This current concentrates on the outer layer of the metal charge under the action of its own magnetic field, so that the outer metal charge has a high current density, thereby generating a concentrated and powerful The thermal effect has caused the metal to be heated to produce a high temperature of up to 2400 °C.

http://www.firstfurnace.com/BdwlkjProduct.asp?id=372

http://www.firstfurnace.com/BdwlkjProduct.asp?id=374