CN102717023A - Natural gas heating furnace - Google Patents
Natural gas heating furnace Download PDFInfo
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- CN102717023A CN102717023A CN2012102154344A CN201210215434A CN102717023A CN 102717023 A CN102717023 A CN 102717023A CN 2012102154344 A CN2012102154344 A CN 2012102154344A CN 201210215434 A CN201210215434 A CN 201210215434A CN 102717023 A CN102717023 A CN 102717023A
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- commutation diode
- controllable silicon
- natural gas
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Abstract
The invention discloses a natural gas heating furnace, which comprises a hearth, wherein the hearth is arranged on a support frame, a plurality of natural gas burning nozzles are arranged at two sides inside the hearth and are connected with a natural gas pipeline or a natural gas cylinder, and the natural gas heating furnace also comprises a temperature control system, wherein the temperature control system comprises a thermocouple, a temperature instrument, a host machine, a control circuit, a proportional valve and an electromagnetic valve, the thermocouple is connected with the temperature instrument, the temperature instrument is respectively connected with the host machine and the control circuit, the control circuit is respectively connected with the host machine, the proportional valve and the electromagnetic valve, the proportional valve and the electromagnetic valve are respectively connected with the natural gas burning nozzles, and the electromagnetic valve is connected with the natural gas pipeline or the natural gas cylinder. The heating furnace is provided with a precise temperature control system and has the advantages that the temperature is stable, and the quality of produced products is high.
Description
Technical field
The present invention relates to a kind of forging tools, relate in particular to a kind of heating furnace.
Background technology
Forging processing is to make one of important method of equipment such as wind-powered electricity generation, thermoelectricity or nuclear power.The process of forging processing mainly is after the temperature that is heated to change metal material rerum natura of metal material through heavy oil stove or electric furnace; With punch press plant equipment punch process; Gas heating furnace is increasing now is applied to the Forge Heating field, and temperature control system is one of its very important part.
An existing gas heating furnace temperature control system part adopts the electronic controller of PID control law; Because factors such as the complex characteristics of gas furnace and strong jamming, time lag are big make fire box temperature be difficult to accurate control, temperature fluctuation is bigger; Can not satisfy the heat treatment requirements of temperature control precision, influence thermal treatment quality smaller or equal to 5～7 ℃.For guaranteeing the minimum temperature value, heighten desired temperature usually, then be prone to cause workpiece scaling loss and gas consumption to increase.In addition, the volume of heating furnace is bigger, and there is very big difference in the temperature of its each position of internal chamber; Even the temperature of each vertical plane all is very different, and therefore can not specifically judge the absolute temperature of heating furnace, is difficult to realize the accurate temperature measurement of furnace temp; Thereby cause the inside heating furnace temperature curve unreasonable, temperature-controlled precision is not high, does not reach technological requirement; Its interior temperature distribution is difficult to the technique initialization expection consistent, causes the quality dissatisfaction of producing product easily.
Summary of the invention
The invention discloses a kind of gas heating furnace, it has accurate temperature control system, temperature stabilization, and the production product quality is high.
Gas heating furnace of the present invention comprises burner hearth, and burner hearth is rack-mount, and the inner both sides of burner hearth are provided with a plurality of natural gas burners, and the natural gas burner is connected with natural gas line or natural gas tank;
This gas heating furnace also comprises temperature control system; Wherein,
This temperature control system comprises thermocouple, thermometric instrument, host computer, control circuit, proportioning valve and magnetic valve; Thermocouple links to each other with thermometric instrument; Thermometric instrument is connected with control circuit with host computer respectively; Control circuit links to each other with host computer, proportioning valve and magnetic valve respectively, and proportioning valve, magnetic valve all are connected with the natural gas burner, and magnetic valve links to each other with natural gas line or natural gas tank; Wherein,
This control circuit comprises capacitor C 1-C4, controllable silicon D1-D2, resistance R 1-R6, commutation diode V1-V7, potentiometer KW1, insurance FR1-FR2, control loop incoming end A, control loop incoming end B; Contactor coil incoming end C and contactor coil incoming end D; The positive pole of controllable silicon D1 is connected with control loop incoming end A through insurance FR1; The negative pole of controllable silicon D1 is connected with the negative pole of commutation diode V3, the positive pole of V4; The negative pole of controllable silicon D1 is connected with capacitor C 2, resistance R 2 through insurance FR2, capacitor C 2 and resistance R 2 and connect and then be connected with capacitor C 1, resistance R 1; Capacitor C 1 and resistance R 1 and connect the back and be connected with the positive pole of controllable silicon D1; The control utmost point of controllable silicon D1 is connected with the negative pole of commutation diode V1; The positive pole of commutation diode V1 is connected with the negative pole of controllable silicon D2; Resistance R 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2; Capacitor C 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2, and the control utmost point of controllable silicon D2 is connected with the output of potentiometer KW1 through resistance R 6, and the positive pole of controllable silicon D2 passes through resistance R 4 and is connected with the positive pole of commutation diode V2; The negative pole of commutation diode V2 is connected with the input of potentiometer KW1 through capacitor C 4, and resistance R 5 also is connected in the two ends of capacitor C 4, and the input of potentiometer KW1 is connected with the adjustable side of potentiometer KW1; The positive pole of the positive pole of commutation diode V3 and commutation diode V7, the positive pole of commutation diode V5, contactor coil incoming end C connects; The negative pole of the negative pole of commutation diode V4 and commutation diode V6, the negative pole of commutation diode V7, contactor coil incoming end D connects; The positive pole of commutation diode V5 negative pole and commutation diode V6, control loop incoming end B connects.
Preferably, the natural gas burner is eight, and is evenly distributed on the both sides of burner hearth;
Preferably, burner hearth bottom is provided with guide rail.
Description of drawings
Fig. 1 is the structural representation of gas heating furnace of the present invention.
Fig. 2 is the circuit diagram of the control circuit of temperature control system in the gas heating furnace of the present invention.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and specific embodiment, to gas heating furnace system of the present invention further explain.
As shown in Figure 1; Gas heating furnace 1 of the present invention comprises burner hearth 11, and burner hearth 11 is installed on the support 12, and burner hearth 11 inner both sides are provided with at least one natural gas burner 13; Natural gas burner 13 is connected with natural gas line or natural gas tank 14, and burner hearth bottom is provided with guide rail 15.Natural gas burner 13 is preferably eight, and is evenly distributed on the both sides of burner hearth 11.
This gas heating furnace utilizes the combustion of natural gas heating; Natural gas supply is even; The heating furnace homogeneous heating is provided with inlet and the outlet that guide rail makes things convenient for labor and materials at the heating furnace bottom half simultaneously, adopts a plurality of natural gas burners to be evenly distributed on the casing both sides; Guarantee the even of the interior heating of casing, helped improving forging quality.
For more stable control heating-up temperature, gas heating furnace of the present invention also comprises temperature control system.
Temperature control system comprises thermocouple 3, thermometric instrument 4, host computer 5, control circuit 6, proportioning valve 7 and magnetic valve 8; Thermocouple 3 links to each other with thermometric instrument 4; Thermometric instrument 4 is connected with control circuit 6 with host computer 5 respectively; Control circuit 6 links to each other with host computer 5, proportioning valve 7 and magnetic valve 8 respectively, and said proportioning valve 7, magnetic valve 8 all are connected with burner 13, and said magnetic valve 8 links to each other with natural gas line or natural gas tank 14.
As shown in Figure 2; Control circuit 6 comprises capacitor C 1-C4, controllable silicon D1-D2, resistance R 1-R6, commutation diode V1-V7, potentiometer KW1, insurance FR1-FR2, control loop incoming end A, control loop incoming end B; Contactor coil incoming end C and contactor coil incoming end D; The positive pole of controllable silicon D1 is connected with control loop incoming end A through insurance FR1; The negative pole of controllable silicon D1 is connected with the negative pole of commutation diode V3, the positive pole of V4, and the negative pole of controllable silicon D1 is connected with capacitor C 2, resistance R 2 through insurance FR2, capacitor C 2 and resistance R 2 and connect and then be connected with capacitor C 1, resistance R 1; Capacitor C 1 and resistance R 1 and connect the back and be connected with the positive pole of controllable silicon D1; The control utmost point of controllable silicon D1 is connected with the negative pole of commutation diode V1; The positive pole of commutation diode V1 is connected with the negative pole of controllable silicon D2; Resistance R 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2; Capacitor C 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2, and the control utmost point of controllable silicon D2 is connected with the output of potentiometer KW1 through resistance R 6, and the positive pole of controllable silicon D2 passes through resistance R 4 and is connected with the positive pole of commutation diode V2; The negative pole of commutation diode V2 is connected with the input of potentiometer KW1 through capacitor C 4, and resistance R 5 also is connected in the two ends of capacitor C 4, and the input of potentiometer KW1 is connected with the adjustable side of potentiometer KW1; The positive pole of the positive pole of commutation diode V3 and commutation diode V7, the positive pole of commutation diode V5, contactor coil incoming end C connects; The negative pole of the negative pole of commutation diode V4 and commutation diode V6, the negative pole of commutation diode V7, contactor coil incoming end D connects; The positive pole of commutation diode V5 negative pole and commutation diode V6, control loop incoming end B connects.
The principle of gas heating furnace temperature control system of the present invention is: the temperature control of burning is gathered burner hearth 1 temperature inside signal by thermocouple 2 and is sent to thermometric instrument 4; Thermometric instrument 4 is sent to control circuit 6 with control signal (PID) again; Control circuit 6 carries out overall observing and controlling through the program of independent development; Signal is input to the comparator in the control circuit 6, the signal generator in the output connection control circuit 6 of comparator, and the output of signal generator connects proportioning valve 7.Control circuit 6 compares temperature and predefined temperature in the detected stove of temperature sensor; If the former is less; Control circuit 6 is promptly exported positive signal, makes magnetic valve 8 opening degrees that connect air natural gas line 9 become big, and the flame of burner 3 ejections promptly increases; Otherwise if the former is bigger, control circuit 6 is promptly exported negative signal, makes the flame of burner 3 ejections promptly reduce.Size control burner hearth 1 temperature inside of continual adjusting Flame of Natural Gas.When putty or long-time charging hysteresis appear in burner hearth 1 inside; Also overtemperature still when burner 3 is adjusted to minimum flame; This control this moment system will lock minimum flame; Automatically convert the ratio temperature control to purpose that pulse-combustion (pulse-combustion promptly: there are several burners in same district, and when being transformed into pulse-combustion, what several burners 3 were interrupted in turn opens) reaches accurate temperature controlling.Control circuit 6 and host computer 5 communications simultaneously, the data of host computer 5 read control circuits 6 inside are presented at data on the host computer 5, make the operator observe the situation in the stove intuitively, regulate temperature according to technological requirement, reach the precise dose technological effect.
When control loop starts, between control loop incoming end A and control loop incoming end B, add the 220V alternating current, the A.C. contactor contactor coil is connected between contactor coil incoming end C and the contactor coil incoming end D.The 220V AC current is divided into into two-way behind the FR1 through insurance: the one tunnel after capacitor C 1 step-down, capacitor C 2 step-downs, through insurance FR2, again after the rectification through commutation diode V3, commutation diode V4, commutation diode V5, commutation diode V6, be connected with the A.C. contactor contactor coil through contactor coil incoming end C; Behind the A.C. contactor contactor coil of flowing through; D returns control loop through the contactor coil incoming end, constitutes contactor and keeps the adhesive loop; Another road is after capacitor C 3 step-downs, resistance R 4 step-downs, again through after commutation diode V2 rectification, capacitor C 4 step-downs, potentiometer RW1, resistance R 6 step-downs, controllable silicon D2, commutation diode V1, controllable silicon D1, commutation diode V3, commutation diode V4, commutation diode V5, the commutation diode V6 rectification, be connected with the A.C. contactor contactor coil through contactor coil incoming end C; Behind the A.C. contactor contactor coil of flowing through; D returns control loop through the contactor coil incoming end, constitutes the contactor adhesive and triggers the loop.When control loop starts; Capacitor C 3, capacitor C 4 begin charging; Charging current triggers controllable silicon D2, controllable silicon D1 conducting; After the controllable silicon D1 conducting, will make contactor through big electric current adhesive through the power supply halfwave rectifier of insurance FR1 after commutation diode V4, contactor coil, commutation diode V5 return power supply.Through after the certain delay; The charging current of capacitor C 3, capacitor C 4 reduces, and when charging current during less than the trigger current of controllable silicon D2, controllable silicon D1, controllable silicon D2, controllable silicon D1 end; The adhesive of A.C. contactor this moment changes little DC current over to and keeps attracting state.
When control loop quits work; When the AC power that is added in control loop incoming end A, control loop incoming end B was stopped power supply, electric current is normal to be discharged A.C. contactor because of nothing is kept, and capacitor C 3 is through resistance R 3 discharges; Capacitor C 4 is prepared for start next time through resistance R 5 discharges.
Resistance R 1, resistance R 2, capacitor C 1,2 couples of controllable silicon D1 of capacitor C have certain overvoltage protection effect; Controllable silicon D2 makes the shutoff of controllable silicon D1 more reliable.
More than described the preferred embodiments of the present invention, but it will be understood by those skilled in the art that under the prerequisite that does not break away from design philosophy of the present invention, its various modification or combination are all included in the protection domain of claim of the present invention.
Claims (3)
1. gas heating furnace, it comprises burner hearth, and burner hearth is rack-mount, and the inner both sides of burner hearth are provided with a plurality of natural gas burners, and the natural gas burner is connected with natural gas line or natural gas tank; It is characterized in that,
This gas heating furnace also comprises temperature control system; Wherein
This temperature control system comprises thermocouple, thermometric instrument, host computer, control circuit, proportioning valve and magnetic valve; Thermocouple links to each other with thermometric instrument; Thermometric instrument is connected with control circuit with host computer respectively; Control circuit links to each other with host computer, proportioning valve and magnetic valve respectively, and proportioning valve, magnetic valve all are connected with the natural gas burner, and magnetic valve links to each other with natural gas line or natural gas tank; It is characterized in that,
This control circuit comprises capacitor C 1-C4, controllable silicon D1-D2, resistance R 1-R6, commutation diode V1-V7, potentiometer KW1, insurance FR1-FR2, control loop incoming end A, control loop incoming end B; Contactor coil incoming end C and contactor coil incoming end D; The positive pole of controllable silicon D1 is connected with control loop incoming end A through insurance FR1; The negative pole of controllable silicon D1 is connected with the negative pole of commutation diode V3, the positive pole of V4; The negative pole of controllable silicon D1 is connected with capacitor C 2, resistance R 2 through insurance FR2, capacitor C 2 and resistance R 2 and connect and then be connected with capacitor C 1, resistance R 1; Capacitor C 1 and resistance R 1 and connect the back and be connected with the positive pole of controllable silicon D1; The control utmost point of controllable silicon D1 is connected with the negative pole of commutation diode V1; The positive pole of commutation diode V1 is connected with the negative pole of controllable silicon D2; Resistance R 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2; Capacitor C 3 is connected across between the positive pole of positive pole and controllable silicon D1 of controllable silicon D2, and the control utmost point of controllable silicon D2 is connected with the output of potentiometer KW1 through resistance R 6, and the positive pole of controllable silicon D2 passes through resistance R 4 and is connected with the positive pole of commutation diode V2; The negative pole of commutation diode V2 is connected with the input of potentiometer KW1 through capacitor C 4, and resistance R 5 also is connected in the two ends of capacitor C 4, and the input of potentiometer KW1 is connected with the adjustable side of potentiometer KW1; The positive pole of the positive pole of commutation diode V3 and commutation diode V7, the positive pole of commutation diode V5, contactor coil incoming end C connects; The negative pole of the negative pole of commutation diode V4 and commutation diode V6, the negative pole of commutation diode V7, contactor coil incoming end D connects; The positive pole of commutation diode V5 negative pole and commutation diode V6, control loop incoming end B connects.
2. gas heating furnace as claimed in claim 1 is characterized in that, preferably, the natural gas burner is eight, and is evenly distributed on the both sides of burner hearth.
3. gas heating furnace as claimed in claim 1 is characterized in that preferably, burner hearth bottom is provided with guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102154344A CN102717023A (en) | 2012-06-28 | 2012-06-28 | Natural gas heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102154344A CN102717023A (en) | 2012-06-28 | 2012-06-28 | Natural gas heating furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107476175A (en) * | 2017-08-14 | 2017-12-15 | 宜昌绿大州复合材料设备研发有限公司 | A kind of marking of asphalt pavement eliminating equipment and operating method |
| CN115198082A (en) * | 2022-07-19 | 2022-10-18 | 李伟斌 | Metal heating furnace capable of improving heating effect |
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| CN2248106Y (en) * | 1996-05-14 | 1997-02-26 | 海红轴承厂 | New-type metal stock heating furnace |
| EP1847342A1 (en) * | 2006-04-20 | 2007-10-24 | Linde AG | Method and device for gas protection of production facilities for hot forming |
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| CN201336249Y (en) * | 2009-01-06 | 2009-10-28 | 瓮福（集团）有限责任公司 | Cooling control circuit of an AC contactor |
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2012
- 2012-06-28 CN CN2012102154344A patent/CN102717023A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1991003576A1 (en) * | 1989-09-07 | 1991-03-21 | Aga Ab | Process and device for the intermediate heating of a forged piece |
| CN2248106Y (en) * | 1996-05-14 | 1997-02-26 | 海红轴承厂 | New-type metal stock heating furnace |
| EP1847342A1 (en) * | 2006-04-20 | 2007-10-24 | Linde AG | Method and device for gas protection of production facilities for hot forming |
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| CN201336249Y (en) * | 2009-01-06 | 2009-10-28 | 瓮福（集团）有限责任公司 | Cooling control circuit of an AC contactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107476175A (en) * | 2017-08-14 | 2017-12-15 | 宜昌绿大州复合材料设备研发有限公司 | A kind of marking of asphalt pavement eliminating equipment and operating method |
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| CN115198082B (en) * | 2022-07-19 | 2024-02-27 | 唐山元丰钢铁有限公司 | Metal heating furnace capable of improving heating effect |
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Application publication date: 20121010 |