CN100454182C - High manganese steel frog heat treating system and heat treating process - Google Patents

High manganese steel frog heat treating system and heat treating process Download PDF

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Publication number
CN100454182C
CN100454182C CNB2006100876069A CN200610087606A CN100454182C CN 100454182 C CN100454182 C CN 100454182C CN B2006100876069 A CNB2006100876069 A CN B2006100876069A CN 200610087606 A CN200610087606 A CN 200610087606A CN 100454182 C CN100454182 C CN 100454182C
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temperature
control
high manganese
plc
manganese steel
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CN1869256A (en
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郭云奇
张洲旭
胡小斌
同亚勇
张彦
张贝
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China Railway Baoji Bridge Group Co Ltd
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China Railway Baoji Bridge Corp
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Abstract

The present invention relates to a special high manganese steel frog heat treatment system used for railways and heat treatment technology. Two sides or three sides of the furnace wall of a high manganese steel treatment furnace are provided with a plurality of fuel gas nozzles; a plurality of fuel gas suction nozzles of the fuel gas nozzles are respectively communicated with a natural gas transportation pipeline by a stop valve and a proportional valve; a plurality of air suction nozzles of the fuel gas nozzles are respectively communicated with an air transportation pipeline by a stop valve and a proportional valve; a plurality of thermocouple sensors are distributed in the high manganese steel treatment furnace and used for collecting hearth temperature; signals collected by the thermocouple sensors are transferred to a computer by PLC and compared with a technological parameter curve settled in the computer, and the temperature rise curve in the high manganese steel treatment furnace is meshed with the technological parameter curve settled by the computer through a PID control system.

Description

High manganese steel frog heat treating system and Technology for Heating Processing
Technical field:
The present invention relates to special-purpose high manganese steel frog heat treating system of a kind of railway and Technology for Heating Processing, belong to the special-purpose high manganese steel frog of railway and make 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 process; The 2nd, the heavy oil heating not only cause severe environmental pollution, and working environment is quite abominable, influences health of operators; The 3rd, adopt manual operations, the synchronism that electric thermo-couple temperature shows in the heating process, the control of heavy oil flux, low thermophase draw stove etc. repeatedly, all not only increased the human factor of heating process 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 consistance of product quality; 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 and Technology for Heating Processing are provided, the one, adopt rock gas to replace the heavy oil heating, cut down the consumption of energy, avoid to greatest extent to the pollution of environment with to operating personnel's physical impairment; The 2nd, adopt automatically detect, automatic control system replaces manually-operated, 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 proposal: in order to realize above-mentioned purpose of design.1, adopt the rock gas heating: the clean energy resource that adopts present country to vigorously promote the use--rock gas, it has, and environmental pollution is little, and cost is low, and combustion stability is good.2, overall process digitizing computer control: 1. gather fire box temperature by 4 thermopairs, determine the control temperature through Computing, the control 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 gating pulse controller, impulse controller output control signal control ratio valve, proportioning 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 firing chamber heated type, whole process need not to draw repeatedly, has shortened the process time (having shortened about 7 hours).4, employing ratio burning control: energy savings, reduced the decarburization of workpiece, put forward the high product inherent quality.5, pulsed burning control: by the large and small fire conversion, energy savings, the accuracy of temperature control height, wide ranges fully stirs furnace gas temperature in the large and small fire transfer process, shorten heat time heating 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 control, system's gas leakage scheme reliably.Guaranteed the heat-treatment furnace safe and reliable operation.
Technical scheme 1: high manganese steel frog heat treating system, it comprises the potassium steel heat-treatment furnace, both sides, furnace wall or three sides that potassium steel is handled stove are provided with a plurality of gas nozzles, the combustion gas admission piece of a plurality of gas nozzles passes through stop valve respectively, proportioning valve is communicated with natural-gas transfer pipeline, the air inlet mouth of a plurality of gas nozzles passes through stop valve respectively, proportioning valve is communicated with airflow pipe, a plurality of thermocouple sensors are distributed in potassium 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 computing machine and with computing machine in the technological parameter curve set compare, make of the technological parameter curve engagement of the interior temperature rise curve of potassium steel heat-treatment furnace by PID (proportional integral derivative controller) control system with computer settings.
Technical scheme 2: high manganese steel frog Technology for Heating Processing, 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 present invention compares with background technology, the one, adopt temperature main ring control (temperature acquisition subsystem), add two and pay ring control (negative pressure acquisition controlling subsystem--combustion chamber draft, blast acquisition controlling subsystem---air blast frequency conversion), the control 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 operating personnel'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 potassium steel heat-treatment furnace in the high manganese steel frog heat treating system.
Fig. 3 is the curve synoptic diagram of potassium steel Technology for Heating Processing.
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 potassium steel is handled stove 9 are provided with a plurality of gas nozzles 7, the combustion gas admission piece of a plurality of gas nozzles 7 is communicated with natural-gas transfer pipeline 3 by stop valve 5, proportioning valve 4 respectively, and admission piece was communicated with air duct by pipeline in the middle of 4 strings of stop valve 5 and proportioning valve had ejector 6 and ejector; The air inlet mouth of a plurality of gas nozzles 7 is communicated with airflow pipe 1 by stop valve 5, proportioning valve 4 respectively, a plurality of thermocouple sensors 8 are distributed in potassium 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 computing machine and with computing machine in the technological parameter curve set compare, the temperature rise curve in the potassium steel heat-treatment furnace meshed with the technological parameter curve of computer settings by PID (proportional integral derivative controller) control system.The input end of natural-gas transfer pipeline is provided with rock gas voltage regulating station 12.The input end of airflow pipe is communicated with blower fan 13 air outlets.The PLC control system is to be made of temperature acquisition subsystem, negative pressure acquisition controlling subsystem, blast acquisition controlling subsystem, temperature control pulse empty combustion valve control subsystem and PLC; 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; The negative pressure differential pressure signal that the negative pressure differential pressure pilot collects in the negative pressure acquisition controlling subsystem through PLC to the Computer signal input end, as calculated machine handle after the work of PLC control flue shutter 11 whether, flue shutter negative pressure differential pressure signal conveys is to the negative pressure differential pressure pilot; The wind pressure signal that the blast pressure controller collects in the blast acquisition controlling subsystem inputs to the Computer signal input end through PLC, and machine is handled after the frequency of operation of PLC control blower fan and the frequency of operation of blower fan is input to the signal input part of blast pressure controller as calculated; The temperature course controller receives the output signal of temperature acquisition subsystem and PLC respectively and whether the work by impulse controller 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, switch output parameter gating pulse controller, impulse controller output control signal control ratio valve, proportioning 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 potassium steel heat-treatment furnace is a prior art, is not described herein at this.Each control 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.
Embodiment 2: with reference to accompanying drawing 1 and 3.The high manganese steel frog Technology for Heating Processing, 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.
What need understand is: though the foregoing description is to the present invention's detailed explanation of contrasting; but these explanations are just to simple declaration of the present invention; rather than limitation of the present invention, any innovation and creation that do not exceed in the connotation of the present invention all fall within the scope of protection of the present invention.

Claims (5)

1, a kind of high manganese steel frog heat treating system, it comprises the potassium steel heat-treatment furnace, it is characterized in that: both sides, furnace wall or three sides that potassium steel is handled stove are provided with a plurality of gas nozzles, the combustion gas admission piece of a plurality of gas nozzles passes through stop valve respectively, proportioning valve is communicated with natural-gas transfer pipeline, the air inlet mouth of a plurality of gas nozzles passes through stop valve respectively, proportioning valve is communicated with airflow pipe, a plurality of thermocouple sensors are distributed in potassium 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 computing machine and with computing machine in the technological parameter curve set compare, make temperature rise curve in the potassium steel heat-treatment furnace with the engagement of the technological parameter curve of computer settings by the PID control system.
2, high manganese steel frog heat treating system according to claim 1 is characterized in that: the PLC control system is to be made of temperature acquisition subsystem, negative pressure acquisition controlling subsystem, blast acquisition controlling subsystem, temperature control pulse empty combustion valve control subsystem and PLC; 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; The negative pressure differential pressure signal that the negative pressure differential pressure pilot collects in the negative pressure acquisition controlling subsystem through PLC to the Computer signal input end, as calculated machine handle after the work of PLC control flue shutter whether, flue shutter negative pressure differential pressure signal conveys is to the negative pressure differential pressure pilot; The wind pressure signal that the blast pressure controller collects in the blast acquisition controlling subsystem inputs to the Computer signal input end through PLC, and machine is handled after the frequency of operation of PLC control blower fan and the frequency of operation of blower fan is input to the signal input part of blast pressure controller as calculated; The temperature course controller receives the output signal of temperature acquisition subsystem and PLC respectively and whether reaches temperature of combustion by impulse controller and the empty work of firing valve of proportional valve control 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: switch output parameter gating pulse controller, impulse controller output control signal control ratio valve, proportioning valve causes air pressure, flow to change, gas ratio valve is regulated in interlock, simultaneously, control furnace pressure and variable frequency control blower fan finally reach the control burning capacity.
4, high manganese steel frog heat treating system according to claim 1 is characterized in that: the input end of natural-gas transfer pipeline is provided with the rock gas voltage regulating station.
5, high manganese steel frog heat treating system according to claim 1 is characterized in that: the input end of airflow pipe is communicated with fan outlet.
CNB2006100876069A 2006-06-13 2006-06-13 High manganese steel frog heat treating system and heat treating process Active CN100454182C (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090683B (en) * 2011-11-02 2015-03-11 上海宝信软件股份有限公司 Method for controlling furnace pressure of pulse furnace
CN103576699A (en) * 2013-10-11 2014-02-12 中航飞机股份有限公司西安飞机分公司 Micro-adjustment method for equipment coordinate position
CN107525092A (en) * 2017-10-18 2017-12-29 西安昱昌环境科技有限公司 Rotary RTO temperature control system and method
CN107885249A (en) * 2017-11-10 2018-04-06 徐州华瑞机械锻造有限公司 A kind of furnace temperature control method
CN109797275A (en) * 2018-06-15 2019-05-24 中铁宝桥集团有限公司 It forges high manganese steel frog manganese and pitches the tough heat treatment production method of edema with the heart involved
CN112662858A (en) * 2020-12-21 2021-04-16 中铁宝桥集团有限公司 Water toughening treatment process for high manganese steel frog

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09194931A (en) * 1996-01-09 1997-07-29 Nkk Corp Combustion method of heat-storage type burner and combustion device thereof
JPH1061941A (en) * 1996-08-22 1998-03-06 Nkk Corp Device and method for alternate combustion control of heat storage type burner
JP2004091922A (en) * 2002-08-09 2004-03-25 Jfe Steel Kk Steel heating furnace
CN2910961Y (en) * 2006-06-13 2007-06-13 中铁宝桥股份有限公司 Heat treatment system for high manganese steel frog

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09194931A (en) * 1996-01-09 1997-07-29 Nkk Corp Combustion method of heat-storage type burner and combustion device thereof
JPH1061941A (en) * 1996-08-22 1998-03-06 Nkk Corp Device and method for alternate combustion control of heat storage type burner
JP2004091922A (en) * 2002-08-09 2004-03-25 Jfe Steel Kk Steel heating furnace
CN2910961Y (en) * 2006-06-13 2007-06-13 中铁宝桥股份有限公司 Heat treatment system for high manganese steel frog

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Owner name: CHINA RAILWAY BAOJI BRIDGE GROUP CO., LTD.

Free format text: FORMER NAME: BAOQIAO CO., LTD., MINISTRY OF RAILWAYS

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Address after: 721006 Baoji Qing Jiang Road, Shaanxi, No. 80

Patentee after: China Railway Baoji Bridge Group Co., Ltd.

Address before: 721006 Baoji Qing Jiang Road, Shaanxi, No. 80

Patentee before: Baoqiao Co., Ltd., Ministry of Railways