CN114540745A - Fork truck business turn over formula gas chamber formula heat treatment furnace - Google Patents
Fork truck business turn over formula gas chamber formula heat treatment furnace Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
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Abstract
The invention relates to the technical field of heat treatment furnaces, and discloses a forklift in-out type gas chamber type heat treatment furnace which comprises a furnace body, a lifting device, a combustion system, a pipeline system, a sealing system, a smoke exhaust system, an automatic control system and an industrial microcomputer distributed monitoring system.
Description
Technical Field
The invention belongs to the technical field of heat treatment furnaces, and particularly relates to a forklift in-out type gas chamber type heat treatment furnace.
Background
The heat treatment furnace is an electric furnace or a fuel furnace for heating charge materials in a heat treatment manner, the common heat treatment furnace comprises a box type resistance furnace, a well type resistance furnace, a gas carburizing furnace, a salt bath furnace and the like, a continuous furnace is generally used, workpieces are continuously loaded from a loading door and are continuously unloaded from a discharging door through a hearth, the workpieces are loaded on a heat-resistant steel guide rail and are transferred by a stepping moving beam or a push rod in a common furnace conveying manner, and in recent years, a heat-resistant steel conveying belt conveying manner is gradually adopted, so that the heat treatment operation is more reasonable, and the possibility of automation and unmanned management of a heat treatment process is greatly increased; the gas heating type heat treatment furnace is a heat treatment furnace that uses gas as fuel for heating.
The existing heating heat treatment furnace has the advantages that a rear section combustion main body is easy to damage, the maintenance cost is high, and the potential safety hazard is large when the furnace is used, so that a forklift inlet and outlet type gas chamber type heat treatment furnace is provided.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the forklift in-out type gas chamber type heat treatment furnace, which effectively solves the problems that a rear-section combustion main body of the heating heat treatment furnace is easy to damage, the maintenance cost is high, and the potential safety hazard is large when the heating heat treatment furnace is used.
In order to achieve the purpose, the invention provides the following technical scheme: a forklift in-and-out type gas chamber type heat treatment furnace comprises a furnace body, a lifting device, a combustion system, a pipeline system, a sealing system, a smoke exhaust system, an automatic control system and an industrial microcomputer distributed monitoring system, wherein the furnace body comprises a steel skeleton, a furnace lining and a furnace platform, and the lifting device, the combustion system, the pipeline system, the sealing system, the smoke exhaust system, the automatic control system and the industrial microcomputer distributed monitoring system are electrically connected.
Preferably, the lifting device comprises a frame structure, a sealing structure of the furnace door and a furnace door lifting mechanism, wherein the frame structure is a frame formed by welding and processing rectangular carbon steel pipes and carbon steel sections, the sealing structure of the furnace door adopts a double-sealing structure with heat channel double-side sealing and cold channel soft and hard sealing, and the furnace door lifting mechanism comprises a helical gear reducer with a brake motor, a chain wheel, a bearing seat, a sleeve roller chain, a counterweight and an adjusting device.
Preferably, the combustion system comprises a combustor, a burner combustion system, a reversing system and a combustion system networking control, wherein the combustor is designed according to the release and diffusion theory and practice of the size of a furnace and the thermal capacity, mainly uses radiation heating, the burner combustion system enables furnace gas to have strong rotation and stirring capacity, the stirring effect of heat accumulating type combustion on high-temperature furnace gas of a hearth due to reversing is enhanced, the reversing system adopts an on-off type cut-off reversing valve, the temperature resistance is 300-350 ℃, the combustion system networking control is provided with an inlet original-mounted controller, the operation can be carried out on site, the control can be carried out among instruments through switching, and a burner distribution indicating plate, an operation button, a working condition display lamp and burner flameout alarm devices are arranged on an operation platform.
Preferably, the road system comprises a natural gas pipeline system, a combustion air pipeline system and a compressed air pipeline system, the natural gas pipeline system is according to the design safety specification of a gas furnace, the natural gas pipeline system is provided with a manual cut-off valve, an Italian gas pressure reducing valve, an emergency valve closing valve and a natural gas turbine flow measuring and calculating system, the following perfect safety explosion-proof measures are adopted in the design of a gas pipeline and a control system of a heat treatment furnace, the combustion air pipeline system has the advantages that the demand of the furnace for combustion air in the heating process is greatly changed, the pulse control system has strict requirements on the air pressure and the natural gas pressure, the compressed air pipeline system supplies an automatic control valve and each compression sealing system as an operation power source, a compressed air source adopts an existing required air pressure system with the pressure of 6kg/cm2, and once the workshop air pressure system stops or is under-pressure, the spare air compressor is automatically started and gives an alarm to ensure normal and continuous operation of production, and the supply amount of compressed air is 60Nm 3/h.
Preferably, the sealing system adopts a mechanism of automatically pressing an inclined block and adding a soft edge of the furnace door for double-channel sealing, and the ladder fiber belt and the heat-resistant cast iron on the periphery of the furnace door and the heat-resistant cast iron on the periphery of the furnace mouth form soft and hard cold channel sealing; the main fiber around the furnace door and the convex fiber belt around the furnace opening form a heat channel double-side seal.
Preferably, the smoke exhaust system comprises a furnace pressure control system, the furnace pressure control system determines whether the temperature in the furnace is uniform and the heat efficiency is high or low according to whether the pressure in the furnace is controlled or whether the pressure in the furnace is controlled, the furnace pressure control system consists of a furnace pressure taking device, a micro differential pressure transmitter, a Siemens PLC and an automatic control induced draft fan, and the induced draft fan, the furnace pressure taking device, the micro differential pressure transmitter and the Siemens PLC form the furnace pressure automatic control system and can change along with the heat supply amount.
Preferably, the automatic control system comprises a temperature control system, a temperature recording system, a combustion control system, a pressure control system, a fault alarm protection system and a power control system, and the temperature control system comprises a Siemens S7-300PLC DCS system, a power control system and the like. The closed-loop automatic control system consisting of a temperature control thermocouple, an S7-300PLC, an upper computer system and a high-speed temperature adjustment automatic control burner system is adopted to automatically control the temperature in the furnace according to the requirement of a heating process curve, the temperature recording system is provided with 4 temperature control thermocouples, the division number of the thermocouples is K-shaped, a hearth temperature measurement compensation lead is connected to the temperature control and measurement thermocouples by a control cabinet, one path of temperature signal is connected to the temperature control system and is communicated with the upper computer, a printer can be used for printing and archiving a real-time temperature curve recorded in the upper computer through the DCS system, and the other path of temperature signal is connected to a Dahuaqian wild multi-channel paper recorder; when the upper computer is in fault, the data recorded by the recorder can be checked at any time, the combustion control system completes functions of purging, ignition, large/small switching, flame detection, flameout protection and the like in a DCS system, the field controller completes functions of ignition, fire detection, field debugging and the like, the HMI workstation is provided with a working condition diagram in the furnace, the combustion, small fire and large fire control and observation working conditions of all burners can be directly operated, each burner is provided with a flameout alarm device to realize automatic flameout monitoring and power-off valve-closing protection functions, once the burner is extinguished or the combustion is not good, the DCS control system can immediately cut off a gas valve in front of the burner and give an alarm, the pressure control system ensures that the furnace works normally and stably, saves energy and improves heating quality, the pressure of all systems is indispensable, the fault alarm protection system can control pressure abnormity, The power control system is controlled by a fan Y-delta starting device and a furnace door lifting power, and the natural gas pressure is interlocked with a combustion system.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the burner is designed according to the release and diffusion theory and practice of the size of the furnace and the thermal capacity, mainly adopts radiation heating, the combustion system of the heating furnace adopts a temperature-regulating self-control direct-flame burner, the combustor consists of two parts, the lining of the front section combustion chamber can be replaced, the rear section combustion main body is not easy to damage, so as to reduce the maintenance cost, the burner combustion system enables the furnace gas to have extremely strong rotating and stirring capacity, the stirring effect of the regenerative combustion on the high-temperature furnace gas of the hearth due to reversing is enhanced, thereby greatly improving the heating speed of the workpiece, improving the combustion efficiency, improving the uniformity of the furnace temperature, ensuring the normal work of the system without the design of a high-temperature flue, reducing the manufacturing cost, the problems that the smoke exhaust is mutually influenced because a plurality of industrial furnaces share the same flue, the furnace pressure is difficult to control, the side plates are easy to burn and the like are completely avoided;
2. the invention adopts the full-temperature section reversing technology, improves the energy-saving efficiency guaranteed to the maximum extent under the condition of guaranteeing the safety from the room temperature, and the traditional heat accumulating type technology needs to start working above the self-ignition point of coal gas, which is also the reason that a plurality of heat accumulating type furnaces do not save energy, the combustion system is networked and provided with an import original controller, can be operated on site and can be switched to control among instruments, and a burner distribution indicating plate, an operating button, a working condition display lamp and burner flameout alarm devices are arranged on an operating platform;
3. according to the invention, working condition diagrams in the furnace are displayed on the HMI workstations, ignition, small fire and large fire control and observation of the working conditions of all burners can be directly operated, each burner is provided with a flameout alarm device, the functions of automatic flameout monitoring and power-off valve closing protection are realized, once the burner is put out for fire or is not well burnt, a DCS control system can immediately cut off a gas valve in front of the burner and give an alarm, a pressure control system ensures that the furnace normally and stably works, saves energy and improves heating quality, the furnace controls the pressure of all systems, and the fault alarm protection system can control various fault alarm and protection functions such as abnormal pressure, flameout of the burner, over-temperature of a thermocouple and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a simplified schematic view of a yoke according to the present invention;
fig. 2 is a right side view of the yoke of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a fork truck inlet and outlet type gas chamber heat treatment furnace comprises a furnace body, a lifting device, a combustion system, a pipeline system, a sealing system, a smoke exhaust system, an automatic control system and an industrial microcomputer distributed monitoring system, wherein the furnace body comprises a steel skeleton, a furnace lining and a furnace platform, and the lifting device, the combustion system, the pipeline system, the sealing system, the smoke exhaust system, the automatic control system and the industrial microcomputer distributed monitoring system are electrically connected
The lifting device comprises a frame structure, a sealing structure of the furnace door and a furnace door lifting mechanism, wherein the frame structure is a frame formed by welding rectangular carbon steel pipes and carbon section steel and used for supporting the heat insulation box body. The two parts are connected through bolts, a certain gap is kept between the contact surfaces of the two parts, the heat conduction of the heat insulation box body and the furnace door frame can be effectively reduced, so that the thermal deformation of the furnace door is reduced, the sealing structure of the furnace door adopts a double-sealing structure of hot-channel double-side sealing and cold-channel soft-hard sealing, and when the furnace door is closed downwards, the furnace door is horizontally displaced by about 30mm by the dead weight and a 30-degree inclined block at the lower end of a guide groove, so that the closing of the furnace door is completed. Thus, the furnace door and the furnace body form two seals: the ladder fiber belt and the heat-resistant cast iron around the furnace door and the heat-resistant cast iron around the furnace mouth form soft and hard cold channel sealing (first sealing); the main body fiber around the furnace door and the convex fiber belt around the furnace mouth form the heat channel double-side sealing (the second channel sealing), the self-weight sealing structure of the furnace door not only ensures the good sealing effect after the furnace door is closed, but also avoids the condition of the front and back swing when the traditional furnace door is lifted (the guide shaft moves up and down in the slideway with smaller clearance), the furnace door is pressed tightly on the cast iron plate around the furnace mouth by the cylinder after the furnace door is closed in place, the sealing performance of the furnace door is ensured, the furnace door lifting mechanism is composed of a helical gear reducer with a brake motor, a chain wheel, a bearing seat, a sleeve roller chain, a balance weight and an adjusting device, the mechanism has accurate and stable transmission, thereby the lifting of the furnace door is stable, and the balance weight is positioned in the door column, and is safe and beautiful, and the working principle is that: the drive sprocket on the output shaft of the speed reducer drives two parallel transmission chains, one end of each chain is respectively connected to two lifting points on two sides of the furnace door, and the other end of each chain is connected with a balance block in the door post, so that the lifting of the furnace door can be stably and accurately completed when the motor operates, the speed reducer and the sleeve roller chain (GB/T1243-97-32B) both adopt domestic famous brands to ensure the service life and the safety of the lifting mechanism of the furnace door, the furnace door is provided with an upper and lower stroke double-safety limiting mechanism to ensure the safety operation, and simultaneously, an overrun safety protection switch is arranged, once the furnace door moves out of limit, the power supply is automatically cut off to ensure the safety of the furnace door, the lifting of the furnace door adopts two modes of local operation of a control box and remote operation of an industrial remote controller, the burner is convenient and reliable, and the combustion system comprises a burner, a reversing system and a combustion system which are controlled in a network, the burner is designed according to the release and diffusion theory and practice of the size of the furnace and the thermal capacity, mainly uses radiation heating, the heating furnace combustion system adopts a temperature-adjusting self-control direct flame burner, the burner consists of two parts, the lining of the front section combustion chamber can be replaced, the rear section combustion main body is not easy to damage so as to reduce the maintenance cost, the burner combustion system enables the furnace gas to have strong rotation and stirring capability, the stirring effect of the heat accumulating type combustion on the high-temperature furnace gas of a hearth due to reversing is enhanced, the temperature rising speed of a workpiece is greatly improved, the combustion efficiency is improved, the uniformity of the furnace temperature is improved, the design of a high-temperature flue is avoided, the normal work of the system is ensured, the manufacturing cost is reduced, the problems of mutual influence of smoke discharge and difficult control of furnace pressure and easy burning of side plates caused by sharing the same flue by a plurality of industrial furnaces are completely avoided, the combustion control adopts a pulse control technology, the pulse combustion control is an important means for ensuring the uniformity of furnace temperature of a periodic industrial furnace, the furnace gas stirring must be controlled and enhanced by adopting multiple temperature zones, a regenerative chamber regenerative gas chamber type heat treatment furnace adopts a side burner heat supply and side combustion type regenerative combustion mode, combustion air is singly preheated, a regenerative burner is a core, a commutator is a key, an air heat storage combined regenerative burner is adopted, a reversing valve and a subarea centralized reversing are adopted, the reversing period is about 30-120 seconds, 4 sets of air heat storage burners are arranged in the whole furnace and are reversed in 2 zones, a regenerative combustion system consists of regenerative burners, a reversing valve, a blower, a smoke exhaust draught fan, air, gas, a flue gas pipeline and various valves, the regenerative burners are arranged at the lower part of the furnace, when the burner at one side burns for heat supply, the burner at the other side smokes for heat storage, the work is repeated, and a circulation loop is formed in the furnace by the high-temperature furnace gas, the dead angle has been eliminated, the interior temperature of stove is even, the impact of stove pressure when having eliminated the switching-over basically, for solving the space and burning the steel billet problem because of the iron scale blocks flame passageway, with the design of heat accumulation air spout for upwards porous blowout hot-air, with the horizontal natural gas spout spun stranded natural gas intensive mixing burning of top, the flame of nozzle is all spout down, 4 sets of nozzles are arranged altogether to the whole stove, each 2 sets of furnace side symmetrical arrangement, every set of nozzle respectively has a heat accumulation formula nozzle and the little nozzle of on duty. The maximum combustion capacity of each set of burners is 60m 3/h. When the flame of the on-duty burner detects open fire, the heat-accumulating type burner can normally work, the on-duty burner has the functions of automatic ignition, flame detection and the like, each zone of heat-accumulating type burner is provided with 1 set of reversing valve used for reversing air and smoke, the reversing valve is arranged on a steel structure at the side of a furnace, a natural gas pipe is provided with a pressure stabilizing valve, a pressure switch and a quick cut-off valve, the front air of each burner and the natural gas pipe are provided with manual regulating valves, the combustion capacity and the air-fuel ratio of each burner can be independently regulated, the natural gas pipeline in front of the burner is provided with an electromagnetic valve, smoke with the temperature of less than or equal to 150 ℃ discharged from the air reversing valve is led out by a smoke exhaust induced draft fan through a smoke main pipe and is discharged through a steel smoke pipe, a heating furnace is provided with a combustion fan for independent air supply, a control box is arranged in a fan room or beside the furnace according to the field condition and can be operated two places, the fan is provided with an air inlet silencer, the noise can be reduced by 20 decibels, the environment protection requirement is met, the flue is forcibly exhausted by using an exhaust draught fan, the heating furnace is provided with 1 exhaust draught fan, the exhaust draught fan can be placed in a furnace tail to be upwards exhausted according to the field condition, a control box is arranged in a fan room or beside the furnace and is operated at two places, a reversing system adopts an on-off cut-off reversing valve, the temperature resistance is 300-, The combustion-supporting air pipeline system and the compressed air pipeline system, the natural gas pipeline system is according to the safety standard of the gas furnace design, the natural gas pipeline system is provided with a manual cut-off valve, an Italian gas pressure reducing valve, an emergency closing valve and a natural gas turbine flow measuring and calculating system, the following perfect safety explosion-proof measures are adopted in the design of the gas pipeline and the control system of the heat treatment furnace, a burner is flameout for alarm, an electric gas valve in front of the burner is automatically and quickly cut off, after the automatic ignition is carried out again, the purging is carried out for 3 seconds, when the gas is in underpressure (less than or equal to 2KPa), a fan is in fault or is in underpressure (less than or equal to 2.5KPa) and the compressed air is in underpressure (less than or equal to 0.2MPa), the system alarms, after the delay time is 6 seconds, the fault is still not eliminated, the power supply of each burner controller is automatically cut off (the gas electromagnetic valve is automatically), meanwhile, the safety cut off of a main pipe cut-off valve is automatically and when the power is suddenly cut off, the electric gas valve in front of the burner and the main pipe-cut off safety cut off valve, after a power supply is received, a normal purging ignition program is started after a main pipe safety cut-off valve is manually started, high-end gas diffusion systems are arranged at the tail end of a gas pipeline in front of the furnace and on a main pipe, and the high-end gas diffusion systems are concentrated and diffused after being gathered; when the furnace is started for the first time or is started after long-time shutdown, air in the pipeline must be completely discharged to avoid explosion or explosion during ignition, and the tail ends of the air main pipes in front of the furnace are provided with explosion-proof membranes with protective covers to prevent gas from permeating into the air pipeline due to valve leakage or other reasons and from puncturing the explosion-proof membranes to release pressure when gas explosion occurs, so that personal or equipment injury accidents are avoided; the main gas inlet pipe is respectively provided with a manual butterfly valve (a first manual valve is provided by a buyer), a gas filter, a pressure transformer, a transmitter, a self-operated pressure regulating valve, a pneumatic safety cut-off valve, a vortex precession flowmeter, a safety diffusion pipeline and the like, after automatic pressure regulation, the pressure of the gas pipeline is automatically decompressed and stabilized from 0.04MPa and is constant at 6 PKa-8 KPa, because the flow rate of the matched pressure regulating valve is large, in the frequent regulation process of the flame of the furnace, the pressure fluctuation is extremely small, the stability of the temperature control process is ensured, the pressure transmitter and the metering signal of the turbine flowmeter are remotely transmitted to a control room distributed monitoring system which can display and record in real time on a microcomputer, a main gas pipeline and a small-fire gas pipeline are arranged in front of each set of combustor, an Italian inlet VMR gas electromagnetic valve and a stainless steel manual cut-off ball valve are arranged on the two pipelines, each set of combustor can realize the automatic control of the whole processes of ignition, flameout alarm and the like, the combustion-supporting air pipeline system has the advantages that the demand of the furnace for combustion-supporting air in the heating process is greatly changed, and the pulse control system has very strict requirements on the air and natural gas pressures, so that in order to ensure the stable pressure of an air main pipe under any working condition, the system needs to have a large combustion-supporting air flow regulating range, flexible rubber connectors are additionally arranged at an inlet and an outlet of a fan, a sound insulation measure is arranged in a fan room, and an automatic air regulating valve and an automatic pressure measuring device are arranged; the automatic combustion-supporting air pressure adjusting device is provided with a pressure transmitter, an electric actuating mechanism self-adjusting air valve and a PLC adjusting instrument form an air pressure constant value closed-loop adjusting system, the pressure of a main air pipe in front of a furnace is automatically controlled and adjusted along with the change of air supply, so that the air pressure is controlled at an optimal value, the air valve adjustment (namely air pressure adjustment) has two control modes of automation and control room manual operation remote control, the combustion-supporting air pressure in front of the furnace is automatically adjusted to be constant at 3.5 PKa-4 KPa, the pressure and the air supply of an air system can be automatically adjusted according to the combustion condition, the reasonable combustion proportion is controlled, and the ends of air branch pipes on two sides of the furnace are provided with explosion-proof pieces to prevent the danger caused by the permeation of fuel gas into an air pipeline. The fan room is arranged on the side surface of the furnace, in order to reduce noise, the fan room with a sound insulation device is arranged, flexible rubber connectors are arranged at the inlet and the outlet of the fan to reduce vibration, an automatic control valve is supplied by a compressed air pipeline system, each compression sealing system is used as an operation power source, a compressed air source adopts a conventional air compression system with the requirement, the pressure is 6kg/cm2, once the air compression system in a workshop stops air supply or is under-pressure, a standby air compressor is automatically started and gives an alarm to ensure normal and continuous operation, the supply amount of the compressed air is 60Nm3/h, the sealing system adopts a double-channel seal of an inclined block automatic compression and furnace door soft edge mechanism, and a ladder fiber belt around the furnace door and heat-resistant cast iron around the furnace door form a first soft and hard cold channel seal with the heat-resistant cast iron around the furnace mouth; the main fiber around the furnace door and the convex fiber belt around the furnace mouth form a heat channel double-side sealing second channel seal, the smoke exhaust system comprises a furnace pressure control system, the furnace pressure control system determines whether the temperature in the furnace is uniform and the heat efficiency is high or low through whether the pressure in the furnace is controlled or whether the pressure in the furnace is good or bad, the furnace pressure control system consists of a furnace pressure taking device, a micro differential pressure transmitter, a Siemens PLC and an automatic induced draft fan, the furnace pressure taking device, the micro differential pressure transmitter and the Siemens PLC form a furnace pressure automatic control system, the automatic control system can change along with the heat supply quantity, the automatic control system comprises a temperature control system, a temperature recording system, a combustion control system, a pressure control system, a fault alarm protection system and a power control system, the temperature control system consists of a Siemens S7-300PLC system, the power control system and the like, and the temperature control thermocouple is adopted, S7-300PLC, upper computer system, high speed temperature adjustment self-control burner system, according to the heating process curve requirement automatic control furnace temperature, the temperature recording system is equipped with 4 temperature control thermocouple, the thermocouple graduation number is K type, the furnace temperature measurement compensation wire is connected to the temperature control thermocouple by the control cabinet, one path temperature signal access temperature control system, with the upper computer communication, can use the printer to print and file the real-time temperature curve recorded in the upper computer through DCS system, another path temperature signal access great wove thousand wild multi-channel paper recorder; when the upper computer is in fault, the data recorded by the recorder can be checked at any time, the combustion control system completes functions of purging, ignition, large/small switching, flame detection, flameout protection and the like in a DCS system, the field controller completes functions of ignition, flame detection, field debugging and the like, the HMI workstation is provided with a working condition diagram in the furnace, the combustion, small flame, large flame control and working condition observation of each burner can be directly operated, each burner is provided with a flameout alarm device, the functions of automatic flameout monitoring and power-off valve closing protection are realized, once the burner is extinguished or the combustion is not good, the DCS control system can immediately cut off a gas valve in front of the burner and alarm, the pressure control system ensures that the furnace works normally and stably, saves energy and improves the heating quality, the furnace controls the pressure of each system, and the fault alarm protection system can control the abnormal pressure, The power control system is controlled by a fan Y-delta starting device and furnace door lifting power, and the natural gas pressure is interlocked with a combustion system.
The industrial microcomputer distributed monitoring system comprises:
(1) the network control system has the main characteristics
The openness is that various standardized software and hardware interfaces are fused, and the industrial Ethernet and a third-party distributed control system, a logic controller network and the like are conveniently accessed through an optical cable/DP twisted pair.
Compatibility, digital signals conforming to the field bus standard and traditional analog signals coexist in the system. The implementation of the existing industrial automation scheme and the field bus technology of the enterprise becomes simple and easy.
And the safety, namely the system safety and the anti-interference performance meet the international standards under the industrial use environment.
The BT-DCS system is an open extensible system which can be conveniently extended and integrated, so that a user can add custom applications of a third party according to the special needs of the user.
And in the field intelligence, an advanced equipment management function is added, and the automatic management is realized on the items such as parameter setting and the like of the intelligent transmitter of the field bus, so that the perfect combination of equipment management and process control is realized.
And the graphical interface provides an integrated graphical interface Siemens Wicc6.0 configuration tool, can conveniently and quickly generate the graphical interface and provides various predefined gallery objects.
And real-time simulation, namely the system has offline real-time debugging and simulation functions, so that the debugging period of the system on site is shortened, and the risk of scheme implementation is reduced.
Remote service, which can realize remote monitoring, fault diagnosis, system maintenance, operation guidance, system upgrade, etc. through remote communication media.
The fault diagnosis has the fault diagnosis function of the system and the transmitter or the sensor, has high intelligent degree, and can easily eliminate faults such as thermocouple disconnection and the like.
(2) Main performance index of BT-DCS system
Working environment, working temperature: 0 ℃ to 50 ℃. Storage temperature: -40 ℃ to 70 ℃.
Working humidity: 10-90% RH, no condensation. Storage humidity: 5-95% RH, no condensation.
Height: the altitude is less than or equal to 2000 m.
The power supply requirement is that the control station: 85-264 VAC, 47-400 Hz and maximum 600W.
And correcting the power factor (according to the IEC61000-3-2 standard).
An operation station: 200-250 VAC, 50Hz, and 500W at most.
The grounding requirement is that the direct current grounds (system grounds) of all network nodes of the same BT-DCS control system must be equal in potential. The system ground, the safety ground and the shielding ground must be converged to the same grounding point (namely, one-point grounding), and the grounding resistance of the grounding point is small enough to be less than 4 omega, so as to ensure that the interference is effectively and quickly eliminated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a fork truck business turn over formula gas chamber formula heat treatment furnace which characterized in that: the furnace comprises a furnace body, a lifting device, a combustion system, a pipeline system, a sealing system, a smoke exhaust system, an automatic control system and an industrial microcomputer distributed monitoring system, wherein the furnace body consists of a steel skeleton, a furnace lining and a furnace platform, and the lifting device, the combustion system, the pipeline system, the sealing system, the smoke exhaust system, the automatic control system and the industrial microcomputer distributed monitoring system are electrically connected.
2. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the lifting device is composed of a frame structure, a sealing structure of the furnace door and a furnace door lifting mechanism, wherein the frame structure is a frame formed by rectangular carbon steel pipes and carbon steel sections through welding processing, the sealing structure of the furnace door adopts a double-sealing structure with double-side sealing of a hot channel and soft-hard sealing of a cold channel, and the furnace door lifting mechanism is composed of a helical gear reducer with a brake motor, a chain wheel, a bearing seat, a sleeve roller chain, a balance weight and an adjusting device.
3. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the burner is designed according to the release and diffusion theory and practice of the size of a furnace type and the thermal capacity, the burner combustion system enables the furnace gas to have strong rotation and stirring capacity, the stirring effect of heat accumulating type combustion on the high-temperature furnace gas of a hearth due to reversing is enhanced, the reversing system adopts an on-off cut-off reversing valve, the temperature resistance is 300-350 ℃, the combustion system is provided with an inlet original-mounted controller in a networking control mode, the operation can be carried out on site, the control can be carried out between instruments through switching, and a burner distribution indicating plate, an operation button, a working condition display lamp and burner flameout alarm devices are arranged on an operation table.
4. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the road system comprises a natural gas pipeline system, a combustion-supporting air pipeline system and a compressed air pipeline system, wherein the natural gas pipeline system is provided with a manual cut-off valve, an Italian gas pressure reducing valve, an emergency valve closing valve and a natural gas turbine flow measuring and calculating system according to the design safety specification of a gas furnace, the following perfect safety explosion-proof measures are adopted in the design of a gas pipeline and a control system of a heat treatment furnace, the combustion-supporting air pipeline system has the advantages that the required quantity of combustion-supporting air of the furnace in the heating process is greatly changed, the pulse control system has strict requirements on the air pressure and the natural gas pressure, the compressed air pipeline system is provided with an automatic control valve and each compression sealing system as an operation power source, a compressed air source adopts the conventional required air pressure system with the pressure of 6kg/cm2, and once the air pressure system of a workshop stops air pressure or is under-pressure, the spare air compressor is automatically started and gives an alarm to ensure normal and continuous operation of production, and the supply amount of compressed air is 60Nm 3/h.
5. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the sealing system adopts a mechanism of automatically pressing an inclined block and adding a furnace door soft edge for double-channel sealing, and a step fiber belt and heat-resistant cast iron on the periphery of the furnace door and heat-resistant cast iron on the periphery of a furnace mouth form soft and hard cold channel sealing; the main fiber around the furnace door and the convex fiber belt around the furnace opening form a heat channel double-side seal.
6. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the smoke exhaust system comprises a furnace pressure control system, the furnace pressure control system determines whether the temperature in the furnace is uniform and the heat efficiency is high or low through whether the pressure in the furnace is controlled or whether the pressure in the furnace is controlled, the furnace pressure control system consists of a furnace pressure taking device, a micro differential pressure transmitter, a Siemens PLC and an automatic control induced draft fan, and the induced draft fan, the furnace pressure taking device, the micro differential pressure transmitter and the Siemens PLC form a furnace pressure automatic control system and can change along with the heat supply quantity.
7. The forklift entry and exit gas chamber type heat treatment furnace according to claim 1, characterized in that: the automatic control system comprises a temperature control system, a temperature recording system, a combustion control system, a pressure control system, a fault alarm protection system and a power control system, wherein the temperature control system comprises a Siemens S7-300PLC DCS system, a power control system and the like. The closed-loop automatic control system consisting of a temperature control thermocouple, an S7-300PLC, an upper computer system and a high-speed temperature adjustment automatic control burner system is adopted to automatically control the temperature in the furnace according to the requirement of a heating process curve, the temperature recording system is provided with 4 temperature control thermocouples, the division number of the thermocouples is K-shaped, a hearth temperature measurement compensation lead is connected to the temperature control and measurement thermocouples by a control cabinet, one path of temperature signal is connected to the temperature control system and is communicated with the upper computer, a printer can be used for printing and archiving a real-time temperature curve recorded in the upper computer through the DCS system, and the other path of temperature signal is connected to a Dahuaqian wild multi-channel paper recorder; when the upper computer is in fault, the data recorded by the recorder can be checked at any time, the combustion control system completes functions of purging, ignition, large/small switching, flame detection, flameout protection and the like in a DCS system, the field controller completes functions of ignition, fire detection, field debugging and the like, the HMI workstation is provided with a working condition diagram in the furnace, the combustion, small fire and large fire control and observation working conditions of all burners can be directly operated, each burner is provided with a flameout alarm device to realize automatic flameout monitoring and power-off valve-closing protection functions, once the burner is extinguished or the combustion is not good, the DCS control system can immediately cut off a gas valve in front of the burner and give an alarm, the pressure control system ensures that the furnace works normally and stably, saves energy and improves heating quality, the pressure of all systems is indispensable, the fault alarm protection system can control pressure abnormity, The power control system has the functions of alarming and protecting various faults such as flameout of a burner, overtemperature of a thermocouple and the like, and is controlled by a fan Y-delta starting device and furnace door lifting power, and the natural gas pressure is interlocked with a combustion system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027363.9A CN114540745A (en) | 2022-01-11 | 2022-01-11 | Fork truck business turn over formula gas chamber formula heat treatment furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027363.9A CN114540745A (en) | 2022-01-11 | 2022-01-11 | Fork truck business turn over formula gas chamber formula heat treatment furnace |
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| CN202210027363.9A Pending CN114540745A (en) | 2022-01-11 | 2022-01-11 | Fork truck business turn over formula gas chamber formula heat treatment furnace |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141033A (en) * | 2014-07-30 | 2014-11-12 | 太仓市顺昌锻造有限公司 | Novel heating furnace |
| CN204848951U (en) * | 2015-08-13 | 2015-12-09 | 宁夏德信恒通管业有限公司 | High temperature heat treatment stove device |
| CN214004734U (en) * | 2020-12-26 | 2021-08-20 | 武汉一控自动化科技有限公司 | Forklift type quenching furnace |
-
2022
- 2022-01-11 CN CN202210027363.9A patent/CN114540745A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141033A (en) * | 2014-07-30 | 2014-11-12 | 太仓市顺昌锻造有限公司 | Novel heating furnace |
| CN204848951U (en) * | 2015-08-13 | 2015-12-09 | 宁夏德信恒通管业有限公司 | High temperature heat treatment stove device |
| CN214004734U (en) * | 2020-12-26 | 2021-08-20 | 武汉一控自动化科技有限公司 | Forklift type quenching furnace |
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Application publication date: 20220527 |