CN212299980U - Temperature control cooling device of electric heating annealing furnace - Google Patents
Temperature control cooling device of electric heating annealing furnace Download PDFInfo
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- CN212299980U CN212299980U CN202021015868.6U CN202021015868U CN212299980U CN 212299980 U CN212299980 U CN 212299980U CN 202021015868 U CN202021015868 U CN 202021015868U CN 212299980 U CN212299980 U CN 212299980U
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- annealing furnace
- heating annealing
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Abstract
The utility model relates to a temperature control cooling device of an electric heating annealing furnace, which comprises a hot air outlet pipe, an ejector, a centrifugal fan, a cooling air main pipe, a cooling air branch pipe, a cooling air capillary pipe and an exhaust pipe; 2 air outlets are arranged on the top of the electric heating annealing furnace, one air outlet is connected with the receiving section of the ejector through a hot air outlet pipe, and a hot air regulating valve is arranged on the hot air outlet pipe; the nozzle of the ejector is connected with the centrifugal fan through a connecting pipeline, and the outlet of the ejector is connected with the cooling air main pipe; a plurality of cooling air inlets are respectively formed in the four walls of the electric heating annealing furnace, each cooling air inlet is respectively connected with a cooling air branch pipe through a cooling air capillary tube, and the cooling air branch pipes are connected with a cooling air main pipe; an exhaust pipe is arranged at the other gas outlet of the electric heating annealing furnace, and a smoke exhaust valve is arranged on the exhaust pipe. The utility model can not only ensure the convection heat transfer effect in the hearth, but also cool the blank at the required speed; but also can avoid the phenomena of local supercooling and uneven cooling and realize the uniform and accurate control of the temperature reduction process.
Description
Technical Field
The utility model relates to an electrical heating annealing stove accuse temperature technical field especially relates to an electrical heating annealing stove accuse temperature cooling device.
Background
The trolley type electric heating annealing furnace with the all-fiber furnace lining mainly adopts a mode of arranging 5 surfaces of electric heating materials for zone heating, and has the advantages of high temperature control precision, uniform heating, good heat preservation performance and high energy efficiency. However, the heat preservation performance is too good, so that the problem that the controllable cooling is difficult to realize in some heat treatment processes with the requirement of temperature reduction speed is caused.
The common cooling method of the electric heating annealing furnace is to open a hole at the top of the furnace, open the seal between the trolley and the furnace body, and utilize the principle of natural convection to lead cold air to enter from the bottom to the top and take away the heat in the furnace. The method is simple and easy to implement, but can not realize effective and controllable cooling.
And a method for strengthening convection is also provided, namely a fan is adopted to blow cold air into the electric heating annealing furnace, so that the fluidity of gas in the furnace is strengthened, and the requirement of rapid cooling is met. When the temperature in the furnace is higher, the temperature difference between the cold air blown in at the initial stage of temperature reduction and the atmosphere in the furnace and the workpiece is larger; if the blown air volume is large, local supercooling near an air inlet point is easily caused, uneven cooling is caused, and the annealing quality of a workpiece is directly influenced; on the other hand, if the amount of blown air is small and the gas in the furnace cannot be sufficiently flowed, the convection effect is poor and it is also difficult to achieve uniform temperature reduction.
Disclosure of Invention
The utility model provides an electric heating annealing furnace temperature control cooling device, based on the fluid ejection principle, the wind power generated by a centrifugal fan is used as a power source, an ejector is used for sucking high-temperature gas in a furnace, after the high-temperature gas is fully mixed, cooling wind which has relatively small temperature difference with the furnace and certain momentum is formed and blown back to the furnace, thereby not only ensuring that the furnace has larger circulation multiplying power, improving the effect of convection heat transfer and cooling blanks according to the required speed; but also can avoid the phenomena of local supercooling and uneven cooling, thereby realizing the uniform and accurate control of the temperature reduction process.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a temperature control cooling device of an electric heating annealing furnace comprises a hot air outlet pipe, an ejector, a centrifugal fan, a cooling air main pipe, a cooling air branch pipe, a cooling air capillary pipe and an exhaust pipe; the middle part of the furnace top of the electric heating annealing furnace is provided with 2 air outlets, one of the air outlets is connected with the receiving section of the ejector through a hot air outlet pipe, and the hot air outlet pipe is provided with a hot air regulating valve; the nozzle of the ejector is connected with the centrifugal fan through a connecting pipeline, and the outlet of the ejector is connected with the cooling air main pipe; a plurality of cooling air inlets are respectively formed in the four walls of the electric heating annealing furnace, each cooling air inlet is respectively connected with a cooling air branch pipe through a cooling air capillary tube, and the cooling air branch pipes are connected with a cooling air main pipe; an exhaust pipe is arranged at the other gas outlet of the electric heating annealing furnace, and a smoke exhaust valve is arranged on the exhaust pipe.
The temperature control cooling device of the electric heating annealing furnace also comprises a control system and a thermocouple; the thermocouple is arranged on the cooling air main pipe, and the thermocouple, the hot air regulating valve and the smoke exhaust valve are respectively connected with the control system.
The centrifugal fan is controlled by adopting frequency conversion, and the control end of the centrifugal fan is connected with a control system.
The ejector is horizontally arranged, and the hot air outlet pipe is a 90-degree bent pipe.
The cooling air inlets are respectively and uniformly arranged at the middle part and the lower part of the electric heating annealing furnace at the same side of each furnace wall.
The electric heating annealing furnace is a trolley type electric heating annealing furnace, and a full-fiber furnace lining is arranged in a hearth.
The diameter of the cooling air main pipe is larger than that of the cooling air branch pipe and larger than that of the cooling air capillary pipe, a fireproof heat-insulating layer is arranged in the cooling air main pipe, and a heat-insulating layer is arranged outside the cooling air branch pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
the electric heating annealing furnace can realize stable and speed-controllable cooling according to the requirements of process indexes, fully utilizes the fluid injection principle, realizes hot air cold mixing so as to achieve large circulation rate convection heat transfer, promotes temperature homogenization in the hearth, avoids the phenomenon of local supercooling, and is favorable for optimizing the heat treatment process and improving the product quality.
Drawings
FIG. 1 is a schematic structural view of a temperature-controlled cooling device for an electric heating annealing furnace.
In the figure: 1. electric heating annealing furnace 2, exhaust pipe 3, smoke exhaust valve 4, hot air outlet pipe 5, ejector 6, hot air regulating valve 7, centrifugal fan 8, cooling air main pipe 9, thermocouple 10, cooling air branch pipe 11 and cooling air capillary pipe
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the temperature-controlled cooling device for an electrical heating annealing furnace of the present invention comprises a hot air outlet pipe 4, an ejector 5, a centrifugal fan 7, a cooling air main pipe 8, a cooling air branch pipe 10, a cooling air capillary pipe 11 and an exhaust pipe 2; the middle part of the furnace top of the electric heating annealing furnace 1 is provided with 2 air outlets, one of the air outlets is connected with a receiving section of an ejector 5 through a hot air outlet pipe 4, and the hot air outlet pipe 4 is provided with a hot air regulating valve 6; the nozzle of the ejector 5 is connected with a centrifugal fan 7 through a connecting pipeline, and the outlet of the ejector 5 is connected with a cooling air main pipe 8; a plurality of cooling air inlets are respectively arranged on the four walls of the electric heating annealing furnace 1, each cooling air inlet is respectively connected with a cooling air branch pipe 10 through a cooling air capillary tube 11, and the cooling air branch pipes 10 are connected with a cooling air main pipe 8; an exhaust pipe 2 is arranged at the other air outlet of the electric heating annealing furnace 1, and a smoke exhaust valve 3 is arranged on the exhaust pipe 2.
The temperature control cooling device of the electric heating annealing furnace also comprises a control system and a thermocouple 9; the thermocouple 9 is arranged on the cooling air main pipe 8, and the thermocouple 9, the hot air regulating valve 6 and the smoke exhaust valve 3 are respectively connected with the control system.
The centrifugal fan 7 is controlled by frequency conversion, and the control end of the centrifugal fan is connected with a control system.
The ejector 5 is horizontally arranged, and the hot air outlet pipe 4 is a 90-degree bent pipe.
The cooling air inlets are respectively and uniformly arranged at the middle part and the lower part of the electric heating annealing furnace 1 at the same side of each furnace wall.
The electric heating annealing furnace 1 is a trolley type electric heating annealing furnace, and a full-fiber furnace lining is arranged in a hearth.
The diameter of the cooling air main pipe 8 is larger than that of the cooling air branch pipe 10 and larger than that of the cooling air capillary pipe 11, a fireproof heat-insulating layer is arranged in the cooling air main pipe 8, and a heat-insulating layer is arranged outside the cooling air branch pipe 10.
An electrical heating annealing stove accuse temperature cooling device is the innovation to annealing stove convection current enhancement heat transfer cooling technique, reserves 2 gas outlets at furnace roof central point, and one of them gas outlet is connected to the accepting section of ejector 5 through hot-blast outlet pipe 4, utilizes the wind that has certain momentum that centrifugal fan 7 generated to follow 5 nozzle blowout of ejector, sucks the steam in the furnace under the negative pressure effect, forms the cooling air that is slightly lower than furnace temperature behind cold, the hot gas intensive mixing. The hot air flow is controlled by a hot air regulating valve 6 at the upstream of the ejector 5, and the cold air flow is controlled by the variable frequency speed regulation of a centrifugal fan 7, so that the ratio control of cold air and hot air is realized, and the aim of controlling the temperature of mixed air is fulfilled. And then is blown into the furnace through cooling air capillaries 11 arranged at the periphery of the electric heating annealing furnace 1, and is cooled with the workpiece in the furnace through convection heat transfer.
In the cooling air circulation process, the amount and pressure of gas in the furnace are increased due to the blending of cold air, and in order to achieve balance, an additional gas outlet arranged on the furnace top is used for discharging redundant gas. Because the temperature difference between the cooling air and the environment in the hearth is controllable, the phenomena of overlarge temperature difference and local supercooling caused by directly blowing cold air can be avoided. Therefore, large air volume circulation can be performed, the circulation multiplying power is increased, and the cooling effect is improved.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.
[ examples ] A method for producing a compound
As shown in FIG. 1, an electric heating annealing furnace 1 is a closed type heating furnace having a steel structure as a main body and a lining of a full fiber lining. A plurality of sizing blocks are sequentially arranged on the bottom surface of the electric heating annealing furnace 1 and used for supporting the blank so that the lower surface of the blank can also be fully transferred with heat. Except the top surface, other 5 surfaces in the hearth are uniformly provided with electrothermal materials so as to achieve the purpose of uniform heating.
2 air outlet holes are reserved in the center of the furnace top: an air outlet hole is provided with an exhaust pipe 2 for direct exhaust, and the excess gas in the furnace during cooling is exhausted by utilizing the pressure difference principle and the heat is taken away. The exhaust pipe 2 is provided with a smoke exhaust valve 3, and when the electric heating annealing furnace 1 is heated, the smoke exhaust valve 3 is closed to prevent cold air from entering or hot air from overflowing.
The other air outlet is connected to the receiving section of the ejector 5 through a hot air outlet pipe 4, and the air outlet of the centrifugal fan 7 is connected to the nozzle of the ejector 5 through a connecting pipeline. The outlet of the ejector 5 is connected with a cooling air main pipe 8, then cooling air branch pipes 10 are led out to four side surfaces of the furnace body, in the embodiment, the cooling air branch pipes 10 are uniformly arranged on the right side (in the direction shown in the figure) of each furnace wall, and finally the cooling air branch pipes 10 are connected with a plurality of cooling air capillary pipes 11 in the middle and at the lower part of the four walls of the furnace body.
In order to make the atmosphere in the furnace orderly and circularly flow and improve the heat exchange efficiency, the cooling air inlets are arranged at the middle and lower parts of the periphery of the furnace body, so as to avoid directly aligning the workpieces; the cooling air is blown into the furnace in multiple points and thin flow strands, and the blowing position and the blowing direction of the cooling air are favorable for forming uniform instantaneous or counterclockwise rotational flow by airflow, so that the generation of opposite interference among the gases sprayed from different cooling air inlets is avoided, the flowability is improved, and the convection effect is enhanced.
The centrifugal fan 7 adopts variable frequency transmission to realize that the injection force and the cold air volume are adjustable. The amount of hot air sucked is controlled by a hot air regulating valve 6. When the electric heating annealing furnace 1 is heated and kept warm, the centrifugal fan 7 is stopped, and the hot air regulating valve 6 is closed, so that the loss of hot air or the backflow of cold air into the furnace are prevented.
The thermocouple 9 arranged on the cooling air main pipe 8 is used for detecting the air temperature of the mixed cooling air, and the accuracy of cooling control is improved.
The cooling air main pipe 8 has a larger caliber, so that a fireproof heat preservation layer can be lined inside, and the cooling air branch pipe 10 has a smaller caliber, so that a heat preservation and insulation layer is covered outside.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.
Claims (7)
1. A temperature control cooling device of an electric heating annealing furnace is characterized by comprising a hot air outlet pipe, an ejector, a centrifugal fan, a cooling air main pipe, a cooling air branch pipe, a cooling air capillary pipe and an exhaust pipe; the middle part of the furnace top of the electric heating annealing furnace is provided with 2 air outlets, one of the air outlets is connected with the receiving section of the ejector through a hot air outlet pipe, and the hot air outlet pipe is provided with a hot air regulating valve; the nozzle of the ejector is connected with the centrifugal fan through a connecting pipeline, and the outlet of the ejector is connected with the cooling air main pipe; a plurality of cooling air inlets are respectively formed in the four walls of the electric heating annealing furnace, each cooling air inlet is respectively connected with a cooling air branch pipe through a cooling air capillary tube, and the cooling air branch pipes are connected with a cooling air main pipe; an exhaust pipe is arranged at the other gas outlet of the electric heating annealing furnace, and a smoke exhaust valve is arranged on the exhaust pipe.
2. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, further comprising a control system and a thermocouple; the thermocouple is arranged on the cooling air main pipe, and the thermocouple, the hot air regulating valve and the smoke exhaust valve are respectively connected with the control system.
3. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, wherein the centrifugal fan is controlled by frequency conversion, and a control end of the centrifugal fan is connected with a control system.
4. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, wherein the ejector is horizontally arranged, and the hot air outlet pipe is a 90-degree bent pipe.
5. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, wherein a plurality of cooling air inlets are uniformly arranged in the middle and the lower part of the electric heating annealing furnace at the same side of each furnace wall.
6. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, wherein the electric heating annealing furnace is a trolley-type electric heating annealing furnace, and a full-fiber lining is arranged in a hearth.
7. The temperature-controlled cooling device for the electric heating annealing furnace according to claim 1, wherein the diameter of the cooling air main pipe is larger than the diameter of the cooling air branch pipe and larger than the diameter of the cooling air capillary pipe, a fireproof heat-insulating layer is arranged in the cooling air main pipe, and a heat-insulating layer is arranged outside the cooling air branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021015868.6U CN212299980U (en) | 2020-06-05 | 2020-06-05 | Temperature control cooling device of electric heating annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021015868.6U CN212299980U (en) | 2020-06-05 | 2020-06-05 | Temperature control cooling device of electric heating annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212299980U true CN212299980U (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021015868.6U Expired - Fee Related CN212299980U (en) | 2020-06-05 | 2020-06-05 | Temperature control cooling device of electric heating annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212299980U (en) |
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2020
- 2020-06-05 CN CN202021015868.6U patent/CN212299980U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210105 Termination date: 20210605 |
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| CF01 | Termination of patent right due to non-payment of annual fee |