CN2910961Y - Heat treatment system for high manganese steel frog - Google Patents

Abstract

The utility model relates to a high manganese steel railway frog heat treatment system used in railway only, the furnace wall of the high manganese steel treatment furnace is provided with several gas nozzles at two sides or three sides, the gas intake beaks of the gas nozzles are connected with the natural gas transmission pipeline by cutoff valves and proportion valves, the air intake beaks of the gas nozzles are connected with the air transmission pipeline by cutoff valves and proportion valves, a number of thermocouple sensors used to collect the furnace temperature are distributed in the high manganese steel treatment furnace, the collected signals of the thermocouple sensors are transfered to the computer through the PLC and compared with the setted process parameter curve of the computer, thereafter make the setted process parameter curve of the computer mesh with the temperature rising curve of the high manganese steel heat treatment furnace by the PLC controlling system.

Description

High manganese steel frog heat treating system

Technical field:

The utility model relates to the special-purpose high manganese steel frog heat treating system of a kind of railway, belongs to the special-purpose High Manganese Steel Frog of railway and makes the field.

Background technology:

The heavy oil heating: the applicant adopts heavy oil when the tough processing of High Manganese Steel Frog water be the fuel heating.The weak point of its existence: the one, along with the rise of oil price, the quality of heavy oil is compared than before, and in continuous decline, calorific value is low and add thermally labile in the combustion processes; The 2nd, the heavy oil heating not only cause severe environmental pollution, and Working environment is quite abominable, influences health of operators; The 3rd, what adopt is manual operations, the synchronism that electric thermo-couple temperature shows in the heat-processed, the control of heavy oil flux, low thermophase draw stove etc. repeatedly, all not only increased the human factor of heat-processed to a certain extent, and because quality is mainly leaned on operation control manually, how the factor of man's activity quality not only directly has influence on the product thermal treatment quality, and can't guarantee the consistence of quality product; The 4th, labour intensity is big; The 5th, the energy consumption height, because the fuel value of current heavy oil is low, heavy oil amount required when the tough processing of water is heated is big, the energy consumption height; The 6th, the every stove High Manganese Steel Frog of the tough processing of water needs about 20 hours consuming time, and efficient is low; The 7th, accuracy of temperature control is low, because the low temperature samming accuracy of temperature control of heavy oil heater be ± 40 ℃, therefore high temperature accuracy of temperature control＞± 40 ℃ directly influence heat treated quality.

Summary of the invention:

Purpose of design: avoid the weak point in the background technology, a kind of high manganese steel frog heat treating system is provided, the one, adopt Sweet natural gas to replace the heavy oil heating, cut down the consumption of energy, avoid to greatest extent to the pollution of environment with to operator's physical impairment; The 2nd, adopt automatically detect, automatic control system replaces manual operation, reaches in the heat treatment process and detects automatically, controls, not only precision height, efficient height, thermal treatment quality are reliable, and the high conformity of quality.

Design: in order to realize above-mentioned purpose of design.1, adopt the Sweet natural gas heating: the clean energy that adopts present country to vigorously promote the use---Sweet natural gas, it has, and environmental pollution is little, and cost is low, and combustion stability is good.2, whole process digitizing computer control: 1. gather fire box temperature by 4 thermopairs, determine controlled temperature through Computing, controlled temperature is compared by computer settings technology, by PID control temperature rise curve is meshed with process curve.Reach digitized technology controlling and process.2. control method makes by the comparison of temperature detection matter with technology matter, output parameter setting pulse controller, pulse manipulator output control signal control ratio valve, proportional valve causes air pressure, flow to change, the uniting and adjustment gas ratio valve finally reaches the control burning capacity.Simultaneously, additional again furnace pressure and fan frequency conversion are controlled, and reach the technology controlling and process of temperature.3, body of heater improves: transform original heavy oil combuster heat treatment furnace as preheating of air, and no combustion chamber heating-type, whole process need not to draw repeatedly, has shortened the process time (having shortened about 7 hours).4, employing ratio burning control: save energy, reduced the decarburization of workpiece, put forward the high product inner quality.5, pulsed burning control: by the large and small fire conversion, save energy, the accuracy of temperature control height, wide ranges fully stirs furnace gas temperature in the large and small fire switching process, shorten heat-up time, and the body of heater uniform temperature is good.6, reliable security alarm mechanism: total system has designed, combustion gas high-low pressure protection link, and flame detects and blowout protection mechanism reliably, perfect furnace pressure and the measure of wind path pressure-controlling, system's gas leakage scheme reliably.Guaranteed the heat treatment furnace safe and reliable operation.

Technical scheme: high manganese steel frog heat treating system, it comprises the high mangaenese steel heat treatment furnace, both sides, furnace wall or three sides that high mangaenese steel is handled stove are provided with a plurality of gas jets, the combustion gas admission piece of a plurality of gas jets passes through stopping valve respectively, proportional valve is communicated with natural-gas transfer pipeline, the air inlet mouth of a plurality of gas jets passes through stopping valve respectively, proportional valve is communicated with airflow pipe, a plurality of thermocouple sensors are distributed in high mangaenese steel and handle in the stove and be used to gather fire box temperature, the signal that a plurality of thermocouple sensors are gathered through PLC (programmable controller) to computer and with computer in the processing parameter curve set compare, make of the processing parameter curve engagement of the interior temperature rise curve of high mangaenese steel heat treatment furnace by PID (proportional integral derivative controller) Controlling System with computer settings.Its thermal treatment process: High Manganese Steel Frog is through moulding, cast, transport heat treatment station to after the unpacking sand removal, will be neat by thermal treatment group special messenger with the stove railway frog, firmly pile up, special-purpose parallels of every layer of railway frog pad and quantity are no less than 4, pile up the number of plies and be no more than 5 layers, various test specimens with the heat cast are gone into kiln together with railway frog, common High Manganese Steel Frog is gone into kiln and is drawn repeatedly for three times, be respectively to stop inside and outside each kiln 10 minutes, temperature is controlled at≤and (350 ± 20) ℃, behind the samming 2 hours, with heat up when being heated to (650 ± 20) ℃ samming 1 hour of＜60 ℃/h speed, continue to be warming up to (1070 ± 20) ℃ with the speed of＜150 ℃/h then, be incubated and promptly open wicket after 2 hours and start suspender.Entry rapidly after the railway frog lifting, the residence time should be less than 60 seconds, after the railway frog entry in air, Chi Zhongshui should not stop to stir, and the residence time must not be less than 20 minutes, during the railway frog water outlet in water for railway frog, the tough pond of water must not be greater than 60 ℃, and the tough back water outlet of finishing dealing with of water advances to fuse station.

The utility model is compared with background technology, the one, adopt temperature main ring control (temperature acquisition subsystem), add two and pay ring control (-air blast frequency conversion that negative pressure is gathered control subsystem--combustion chamber draft, blast are gathered control subsystem--), controlled temperature is that parameter is controlled with the burner hearth medial temperature, many reference amounts control, main parameters-----temperature uniformity, the Controllable Temperature of disturbing industrial furnace to influence product are effectively realized, reach ± 5 ℃ of inhomogeneity final experimental parameters; The 2nd, process controllability good (taking medial temperature is the control parameter), energy-saving effect is more than 50%; The 3rd, thoroughly solved pollution to environment, the discharging of environmental pollution thing descends more than 50%; The 4th, reduced labor intensity of operating personnel widely, fundamentally improve operator's Working environment; The 5th, realized automatic detection, the control in the heat treatment process, not only precision height, efficient height, and also thermal treatment quality is reliable, high conformity.

Description of drawings:

Fig. 1 is the block diagram of high manganese steel frog heat treating system.

Fig. 2 is the structural representation of high mangaenese steel heat treatment furnace in the high manganese steel frog heat treating system.

Fig. 3 is the curve synoptic diagram of high mangaenese steel thermal treatment process.

Embodiment:

Embodiment 1: with reference to attached Fig. 1 and 2.High manganese steel frog heat treating system, it comprises chassis 10, both sides, furnace wall or three sides that high mangaenese steel is handled stove 9 are provided with a plurality of gas jets 7, the combustion gas admission piece of a plurality of gas jets 7 is communicated with natural-gas transfer pipeline 3 by stopping valve 5, proportional valve 4 respectively, and admission piece was communicated with air line by pipeline in the middle of 4 strings of stopping valve 5 and proportional valve had ejector 6 and ejector; The air inlet mouth of a plurality of gas jets 7 is communicated with airflow pipe 1 by stopping valve 5, proportional valve 4 respectively, a plurality of thermocouple sensors 8 are distributed in high mangaenese steel and handle in the stove 9 and be used to gather fire box temperature, the signal that a plurality of thermocouple sensors 8 are gathered through PLC (programmable controller) to computer and with computer in the processing parameter curve set compare, the temperature rise curve in the high mangaenese steel heat treatment furnace meshed with the processing parameter curve of computer settings by PID (proportional integral derivative controller) Controlling System.The input terminus of natural-gas transfer pipeline is provided with Sweet natural gas voltage regulating station 12.The input terminus of airflow pipe is communicated with blower fan 13 air outlets.The PLC Controlling System is to gather control subsystem, blast collection control subsystem, temperature control pulse empty combustion valve control subsystem and PLC by temperature acquisition subsystem, negative pressure to constitute; The temperature signal that thermopair collects in the temperature acquisition subsystem is through multipoint temperature controller, divider, and one the tunnel inputs to the signal input part of the temperature course controller in the empty combustion of the temperature control pulse valve control subsystem, and one the tunnel inputs to the signal input part of PLC; Negative pressure gather the negative pressure differential pressure pilot collects in the control subsystem negative pressure differential pressure signal through PLC to the Computer signal input terminus, as calculated machine handle after the work of PLC control flue shutter 11 whether, flue shutter negative pressure differential pressure signal is delivered to the negative pressure differential pressure pilot; Blast is gathered the wind pressure signal that the pressure of blast controller collects in the control subsystem and is inputed to the Computer signal input terminus through PLC, and machine is handled after the operating frequency of PLC control blower fan and the operating frequency of blower fan is input to the signal input part of pressure of blast controller as calculated; The temperature course controller receives the output signal of temperature acquisition subsystem and PLC respectively and whether the work by pulse manipulator and proportional valve control air-fuel ratio valve reaches combustion combustion temperature in the empty combustion of the temperature control pulse valve control subsystem, that is to say, transfer lever output parameter setting pulse controller, pulse manipulator output control signal control ratio valve, proportional valve causes air pressure, flow to change, the uniting and adjustment gas ratio valve, simultaneously, control furnace pressure and fan frequency conversion control finally reach the control burning capacity.The manufacture craft of high mangaenese steel heat treatment furnace is a prior art, is not described herein at this.Each pilot circuit, heat treatment process parameter are selected, the setting of curve all is the development and use of prior art, are not described in detail at this.Various kinds of sensors all is a prior art, is not described in detail at this.Its thermal treatment process: with reference to accompanying drawing 1 and 3.High Manganese Steel Frog is through moulding, cast, transport heat treatment station to after the unpacking sand removal, will be neat by thermal treatment group special messenger with the stove railway frog, firmly pile up, special-purpose parallels of every layer of railway frog pad and quantity are no less than 4, pile up the number of plies and be no more than 5 layers, various test specimens with the heat cast are gone into kiln together with railway frog, common High Manganese Steel Frog is gone into kiln and is drawn repeatedly for three times, be respectively to stop inside and outside each kiln 10 minutes, temperature is controlled at≤and (350 ± 20) ℃, behind the samming 2 hours, with heat up when being heated to (650 ± 20) ℃ samming 1 hour of＜60 ℃/h speed, continue to be warming up to (1070 ± 20) ℃ with the speed of＜150 ℃/h then, be incubated and promptly open wicket startup suspender after 2 hours.Entry rapidly after the railway frog lifting, the residence time should be less than 60 seconds, after the railway frog entry in air, Chi Zhongshui should not stop to stir, and the residence time must not be less than 20 minutes, during the railway frog water outlet in water for railway frog, the tough pond of water must not be greater than 60 ℃, and the tough back water outlet of finishing dealing with of water advances to fuse station.

What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these explanations are just to simple declaration of the present utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection domain of the present utility model.

Claims (5)

1, a kind of high manganese steel frog heat treating system, its bag innage manganese steel heat treatment furnace, it is characterized in that: both sides, furnace wall or three sides that high mangaenese steel is handled stove are provided with a plurality of gas jets, the combustion gas admission piece of a plurality of gas jets passes through stopping valve respectively, proportional valve is communicated with natural-gas transfer pipeline, the air inlet mouth of a plurality of gas jets passes through stopping valve respectively, proportional valve is communicated with airflow pipe, a plurality of thermocouple sensors are distributed in high mangaenese steel and handle in the stove and be used to gather fire box temperature, the signal of a plurality of thermocouple sensor collections through PLC to computer and with computer in the processing parameter curve set compare, make temperature rise curve in the high mangaenese steel heat treatment furnace with the engagement of the processing parameter curve of computer settings by the PLC Controlling System.

2, high manganese steel frog heat treating system according to claim 1 is characterized in that: the PLC Controlling System is to gather control subsystem, blast collection control subsystem, temperature control pulse empty combustion valve control subsystem and PLC by temperature acquisition subsystem, negative pressure to constitute; The temperature signal that thermopair collects in the temperature acquisition subsystem is through multipoint temperature controller, divider, and one the tunnel inputs to the signal input part of the temperature course controller in the empty combustion of the temperature control pulse valve control subsystem, and one the tunnel inputs to the signal input part of PLC; Negative pressure gather the negative pressure differential pressure pilot collects in the control subsystem negative pressure differential pressure signal through PLC to the Computer signal input terminus, as calculated machine handle after the work of PLC control flue shutter whether, flue shutter negative pressure differential pressure signal is delivered to the negative pressure differential pressure pilot; Blast is gathered the wind pressure signal that the pressure of blast controller collects in the control subsystem and is inputed to the Computer signal input terminus through PLC, and machine is handled after the operating frequency of PLC control blower fan and the operating frequency of blower fan is input to the signal input part of pressure of blast controller as calculated; The temperature course controller receives the output signal of temperature acquisition subsystem and PLC respectively and whether the work by pulse manipulator and proportional valve control air-fuel ratio valve reaches combustion combustion temperature in the empty combustion of the temperature control pulse valve control subsystem.

3, high manganese steel frog heat treating system according to claim 1 and 2, it is characterized in that: transfer lever output parameter setting pulse controller, pulse manipulator output control signal control ratio valve, proportional valve causes air pressure, flow to change, the uniting and adjustment gas ratio valve, simultaneously, control furnace pressure and fan frequency conversion control finally reach the control burning capacity.

4, high manganese steel frog heat treating system according to claim 1 is characterized in that: the input terminus of natural-gas transfer pipeline is provided with the Sweet natural gas voltage regulating station.

5, high manganese steel frog heat treating system according to claim 1 is characterized in that: the input terminus of airflow pipe is communicated with fan outlet.