CN210922180U

CN210922180U - Energy-saving roasting furnace capable of heating uniformly

Info

Publication number: CN210922180U
Application number: CN201921301946.6U
Authority: CN
Inventors: 张建雄; 赖信强; 伍星
Original assignee: Zhejiang Suijin Special Casting Co ltd
Current assignee: Zhejiang Suijin Special Casting Co ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-07-03
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses an energy-saving uniformly-heated roasting furnace, which comprises a furnace body, wherein a first burner furnace is arranged on the left side of the furnace body, and a second burner furnace is arranged on the right side of the furnace body; the cavity of the first burner furnace is communicated with the cavity of the furnace body, a first air inlet pipe is fixed at the top end of the first burner furnace, a first pipeline is fixed at the bottom end of the first burner furnace, a first regulating switch is installed on the first air inlet pipe, and a first igniter is installed in the first burner furnace; the cavity of the second burner furnace is communicated with the furnace body cavity, a second air inlet pipe communicated with the second burner furnace cavity is fixed at the top end of the second burner furnace, a second pipeline communicated with the second burner furnace cavity is fixed at the bottom end of the second burner furnace, a second adjusting switch is installed in the second air inlet pipe, and a second igniter is installed in the second burner furnace. The utility model discloses structural design is ingenious, reasonable, can play energy-conservation and sand mould calcination is heated the effect that the sand mould after even, the calcination is difficult for the fracture, is worth popularizing and applying.

Description

Energy-saving roasting furnace capable of heating uniformly

Technical Field

The utility model relates to a combustion furnace, in particular to an energy-saving uniform heating roasting furnace.

Background

Investment casting mainly comprises the procedures of mould manufacturing, wax mould manufacturing, shell mould manufacturing, drying, roasting, pouring, solidifying and the like, wherein the wax mould is used for forming a mould pattern of a casting cavity, and is wrapped by special casting sand containing a molding sand binder to form a sand mould, in order to form a pouring cavity in the sand mould, the sand mould needs to be roasted and melted, the wax mould is commonly called as an investment mould, and the melted wax mould is infiltrated into the special casting sand of the sand mould, so that the pouring cavity of the sand mould is completed.

The sand mold is placed in a roasting furnace for sand mold roasting in the prior art, and then the roasting furnace is directly heated by high-temperature flame, and the heating mode is uneven in heating, so that the wax mold is not completely melted and the sand mold is easy to crack in the roasting process.

The utility model discloses a chinese utility model patent CN 207831929U discloses a mould shell bakes burning furnace over a slow fire, and this mould shell bakes burning furnace over a slow fire, including the furnace body, the furnace body includes the conveying platform and sets up the oven of conveying platform both sides is equipped with the furnace roof between the oven, and the conveying bench is equipped with the calcination conveying platform, and the calcination conveying bench is equipped with the objective table that the width is less than calcination conveying platform, is equipped with a plurality of vent channels in the both sides of objective table on the calcination conveying platform, and the conveying platform is in the below of calcination conveying platform is equipped with the heating chamber, the heating intracavity is equipped with the heating pipe, and this kind of mould shell bakes burning furnace over a slow fire and adopts a little heating method of concentrating to cause the interior unevenness.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve above-mentioned prior art's shortcoming, provide one kind and can make the even and energy-conserving even formula of being heated of furnace temperature in the burning furnace body of burning a burning furnace roast burning furnace, satisfied the user can be to sand mould firing be heated evenly, fire of high quality, be difficult for fracture, demand with low costs.

The utility model provides a technical scheme that its technical problem adopted: the energy-saving uniformly-heated roasting furnace comprises a furnace body, wherein a first burner furnace is arranged on the left side of the furnace body, and a second burner furnace is arranged on the right side of the furnace body; the cavity of the first burner furnace is communicated with the furnace body cavity, a first air inlet pipe communicated with the first burner furnace cavity is fixed at the top end of the first burner furnace, a first pipeline communicated with the first burner furnace cavity is fixed at the bottom end of the first burner furnace, a first adjusting switch is installed on the first air inlet pipe, and a first igniter is installed in the first burner furnace; the cavity of the second burner furnace is communicated with the furnace body cavity, a second air inlet pipe communicated with the second burner furnace cavity is fixed at the top end of the second burner furnace, a second pipeline communicated with the second burner furnace cavity is fixed at the bottom end of the second burner furnace, a second adjusting switch is installed on the second air inlet pipe, and a second igniter is installed in the second burner furnace; the lateral part of furnace body is equipped with the switching-over valve, the tip of first pipeline is connected with the a end interface of switching-over valve, the tip of second pipeline is connected with the c end interface of switching-over valve, the d end interface of switching-over valve is connected with the admission line, the lateral part of switching-over valve is equipped with the exhaust pipe, be connected with the connecting pipe between the b end interface of switching-over valve and the exhaust pipe, the furnace body, the inside of first nozzle stove and second nozzle stove all is embedded to have the insulating layer, the furnace body, be fixed with the brick layer on the inner wall of first nozzle stove and second nozzle stove. The first burner furnace has the functions that the first burner furnace is used for burning, and the generated high temperature flows to the furnace body to heat the furnace body, so that the sand mould in the furnace body is roasted; the second burner furnace has the function that the second burner furnace is used for burning, and the generated high temperature flows into the furnace body to heat the furnace body, so that the sand mould in the furnace body is roasted; the first adjusting switch is used for adjusting the air inflow of the first air inlet pipe, so that the combustion temperature in the first burner furnace is controlled, and the temperature in the furnace body can be controlled; the second adjusting switch is used for adjusting the air inflow of the second air inlet pipe, so that the combustion temperature in the second burner furnace is controlled, and the temperature in the furnace body can be further controlled; the first igniter and the second igniter are used for igniting the first burner furnace or the second burner furnace; the reversing valve has the function of changing whether the air of the third heat insulation communication hose is blown into the first burner furnace or the second burner furnace, so that the first burner furnace or the second burner furnace can be alternately combusted, and the heat is transferred into the furnace body; the heat insulation layer has the effects of insulating the first burner furnace, the second burner furnace and the furnace body, thereby reducing heat transfer, further reducing energy consumption and achieving the effect of energy conservation; the effect on brick and tile layer here is, the brick and tile layer is exactly the heat-resistant layer that the concatenation of utilizing the brick and tile formed, because the brick and tile has high temperature resistance, so, it is also good to the furnace body, first nozzle stove and second nozzle stove are also good, need not to utilize the metal material preparation of high temperature resistance, the cost can reduce a lot, utilize ordinary iron panel just can the welding process body, the inner increase brick and tile layer of body just can play the heat resistance of iron panel body again, not only with low costs, and it is thermal-insulated to also have, resistant fever, characteristics with low costs.

Further perfecting, the lateral part of the furnace body is provided with a waste heat recovery device, the waste heat recovery device comprises a first continuous bending cooling pipe arranged in a smoke exhaust pipeline, the lateral part of the smoke exhaust pipeline is provided with a cylinder body with an inlet end and an outlet end, a second continuous bending cooling pipe is arranged in the cylinder body, a first heat insulation communicating hose is connected between the inlet end of the first continuous bending cooling pipe and the outlet end of the second continuous bending cooling pipe, a second heat insulation communicating hose is connected between the outlet end of the first continuous bending cooling pipe and the inlet end of the second continuous bending cooling pipe, a circulating pump is arranged at the position of the first heat insulation communicating hose, the first continuous bending cooling pipe, the second continuous bending cooling pipe, the first heat insulation communicating hose and the second heat insulation communicating hose are filled with cooling liquid, the lateral part of the air inlet pipeline is provided with an exhaust fan, and an air outlet of the exhaust, the air suction port of the exhaust fan is connected with the air outlet of the barrel through a third heat insulation communicating hose. The waste heat recovery device has the effects that waste heat of hot gas discharged from the furnace body can be collected and recycled, the heat collected by heating the first continuous bending cooling pipe is transferred to the second continuous bending cooling pipe, the external air pumped by the exhaust fan is recycled, the heat on the second continuous bending cooling pipe is taken away through the inlet end of the cylinder body, and the air taking away the heat is mixed with fuel gas in the furnace body again through the air inlet pipeline for combustion, so that the temperature rise operation in the furnace body can be rapidly performed; the working principle of the waste heat recovery device is as follows: the heat brought out from the furnace body passes through the connecting pipe and then reaches the smoke exhaust pipeline, the waste gas reaching the smoke exhaust pipeline passes through the cooling liquid of the first continuous bending cooling pipe to be subjected to heat collection, then passes through the circulation of the circulating pump to enable the cooling liquid in the first continuous bending cooling pipe to flow into the second continuous bending cooling pipe in a circulating way, so that the temperature of the cooling liquid in the second continuous bending cooling pipe is increased, the second continuous bending cooling pipe with the increased temperature is pumped through the exhaust fan to enable the outside air to enter through the inlet end, and then passes through the second continuous bending cooling pipe in the cylinder body to enable the temperature of the air sucked into the cylinder body to be heated and increased, so that the air with the increased temperature is blown into the first burner furnace or the second burner furnace through the air inlet pipeline to be mixed with the fuel gas sprayed by the first air inlet pipe or the second air inlet pipe, thereby rapidly improving the temperature in the furnace body and further achieving the purpose of energy conservation.

Further perfect, furnace body department installs the temperature sensor probe, and the lateral part of furnace body is equipped with PLC controller, switch and touch screen, and the switching-over valve is four passageway electromagnetic reversing valves, and first regulating switch, second regulating switch are electromagnetic regulation flow switch, and the PLC controller is in the same place with switch, touch screen, temperature sensor probe, air exhauster, circulating pump, switching-over valve, first regulating switch, second regulating switch, first igniter, second igniter circuit connection. The PLC controller has the function of coordinating and moving the electric power components to operate, so that the temperature rise of the furnace body and the automation of sand mold firing are improved, and the quality of the sand mold firing is improved; the PLC controller in the scheme is a universal programmable logic controller on the market, and can select universal trademarks such as Mitsubishi PLC, Schneider PLC, Unikon Unitronics, Taida PLC, Panasonic PLC and the like on the market; in addition, the program setting of the PLC controller is basically consistent with the principle of a setting method which is passed through in the market, and ordinary technicians can set program instructions according to the requirements of machining speed and efficiency, so that the PLC controller is quick in aspect. The temperature sensor probe is a product existing in the market, and can be selected from products of companies such as a medium platinum sensor (Taicang) Limited company, Shenzhen Jinjingzi electronic technology Limited company and the like; the reversing valve is a four-channel electromagnetic reversing valve, and can be selected from products of Shanghai Juliang valve group, China Lianggong valve group and other companies; the touch screen has the function that the touch screen can be touched to conveniently modify and control the roasting parameters.

The utility model discloses profitable effect is: the utility model has the advantages of ingenious design, it is reasonable, utilize the repeated combustion heat transfer of first burner furnace and second burner furnace, improve the furnace temperature, thereby make the temperature in the furnace body be evenly distributed, thereby fire of high quality to husky mould, be difficult for the fracture, effect with low costs, utilize waste heat recovery device can carry out waste heat recovery to the waste gas through the exhaust pipe emission, thereby to blowing in first burner furnace, the air of second burner furnace department is hot, thereby can be fast to first burner furnace, the second burner furnace heaies up, thereby play the energy saving, improve the effect of the internal temperature of furnace fast, be worth popularizing and applying.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the middle waste heat recovery device of the present invention.

Description of reference numerals: the device comprises a furnace body 1, a first burner furnace 2, a first air inlet pipe 2-1, a first pipeline 2-2, a first regulating switch 2-3, a first igniter 2-4, a second burner furnace 3, a second air inlet pipe 3-1, a second pipeline 3-2, a second regulating switch 3-3, a second igniter 3-4, a reversing valve 4, an air inlet pipe 5, a smoke exhaust pipe 6, a connecting pipe 7, a heat insulation layer 8, a brick and tile layer 9, a waste heat recovery device 10, a first continuous bent cooling pipe 10-1, a cylinder 10-2, an inlet end e, an outlet end f, a second continuous bent cooling pipe 10-3, a first heat insulation communicating hose 10-4, a second heat insulation communicating hose 10-5, a circulating pump 10-6, a cooling liquid 10-7, an exhaust fan 10-8 and a third heat insulation communicating hose 10-9, the temperature sensor comprises a temperature sensor probe 11, a PLC (programmable logic controller) 12, a power switch 13 and a touch screen 14.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

with reference to the accompanying drawings: the energy-saving uniformly-heated roasting furnace comprises a furnace body 1, wherein a first burner furnace 2 is arranged on the left side of the furnace body 1, and a second burner furnace 3 is arranged on the right side of the furnace body 1; the cavity of the first burner furnace 2 is communicated with the cavity of the furnace body 1, a first air inlet pipe 2-1 communicated with the cavity of the first burner furnace 2 is fixed at the top end of the first burner furnace 2, a first pipeline 2-2 communicated with the cavity of the first burner furnace 2 is fixed at the bottom end of the first burner furnace 2, a first adjusting switch 2-3 is installed on the first air inlet pipe 2-1, and a first igniter 2-4 is installed in the first burner furnace 2; the cavity of the second burner furnace 3 is communicated with the cavity of the furnace body 1, a second air inlet pipe 3-1 communicated with the cavity of the second burner furnace 3 is fixed at the top end of the second burner furnace 3, a second pipeline 3-2 communicated with the cavity of the second burner furnace 3 is fixed at the bottom end of the second burner furnace 3, a second adjusting switch 3-3 is installed on the second air inlet pipe 3-1, and a second igniter 3-4 is installed in the second burner furnace 3; the lateral part of the furnace body 1 is provided with a reversing valve 4, the end part of the first pipeline 2-2 is connected with an a-end interface of the reversing valve 4, the end part of the second pipeline 3-2 is connected with a c-end interface of the reversing valve 4, a d-end interface of the reversing valve 4 is connected with an air inlet pipeline 5, the lateral part of the reversing valve 4 is provided with a smoke exhaust pipeline 6, a connecting pipe 7 is connected between a b-end interface of the reversing valve 4 and the smoke exhaust pipeline 6, the furnace body 1, the first burner furnace 2 and the second burner furnace 3 are internally embedded with a heat insulation layer 8, and the inner walls of the furnace body 1, the first burner furnace 2 and the second burner furnace 3 are all fixed with brick and tile layers 9.

A waste heat recovery device 10 is arranged on the side part of the furnace body 1, the waste heat recovery device 10 comprises a first continuous bending cooling pipe 10-1 arranged in a smoke exhaust pipeline 6, a cylinder body 10-2 with an inlet end e and an outlet end f is arranged on the side part of the smoke exhaust pipeline 6, a second continuous bending cooling pipe 10-3 is arranged in the cylinder body 10-2, a first heat insulation communicating hose 10-4 is connected between the inlet end of the first continuous bending cooling pipe 10-1 and the outlet end of the second continuous bending cooling pipe 10-3, a second heat insulation communicating hose 10-5 is connected between the outlet end of the first continuous bending cooling pipe 10-1 and the inlet end of the second continuous bending cooling pipe 10-3, a circulating pump 10-6 is arranged at the position of the first heat insulation communicating hose 10-4, and the first continuous bending cooling pipe 10-1, The second continuous bending cooling pipe 10-3, the first heat insulation communicating hose 10-4 and the second heat insulation communicating hose 10-5 are filled with cooling liquid 10-7, an exhaust fan 10-8 is arranged on the side portion of the air inlet pipeline 5, an air outlet of the exhaust fan 10-8 is matched with the air inlet pipeline 5, and an air suction port of the exhaust fan 10-8 is connected with an air outlet of the cylinder 10-2 through a third heat insulation communicating hose 10-9.

The furnace body 1 is provided with a temperature sensor probe 11, the side part of the furnace body 1 is provided with a PLC controller 12, a power switch 13 and a touch screen 14, a reversing valve 4 is an electromagnetic reversing valve, a first adjusting switch 2-3 and a second adjusting switch 3-3 are electromagnetic opening and closing switches, and the PLC controller 12 is in circuit connection with the power switch 13, the touch screen 14, the temperature sensor probe 11, an exhaust fan 10-8, a circulating pump 10-6, the reversing valve 4, the first adjusting switch 2-3, the second adjusting switch 3-3, a first igniter 2-4 and a second igniter 3-4.

The utility model discloses a theory of operation: firstly, a sand mould is placed in a furnace body 1, a bracket is used for carrying out overhead operation on the sand mould, then, a power switch 13 is started, so that a PLC (programmable logic controller) 12 is started, the PLC 12 controls a first regulating switch 2-3, so that a first air inlet pipe 2-1 carries out gas filling operation on the first burner furnace 2, meanwhile, an exhaust fan 10-8 is started, air is pumped by the exhaust fan 10-8, the air is sucked through an inlet end e and is discharged into a reversing valve 4 from an air inlet pipeline 5 to change the direction, the direction is changed through the reversing valve 4, because a d end at the reversing valve 4 is communicated with an a end, the air sucked through the exhaust fan 10-8 is discharged into the first burner furnace 2, and then, the PLC 12 controls a first igniter 2-4 to ignite and burn mixed gas in the first burner nozzle 2, the heat of combustion in the first burner furnace 2 reaches the furnace body 1 through heat conduction and bakes the sand mould, the waste gas generated by combustion passes through the second pipeline 3-2 and the end c of the reversing valve 4 to the end b and is discharged through the connecting pipe 7 and the smoke exhaust pipeline 6, the waste heat of the waste gas can be recycled and reused through the waste heat recycling device 10, then the PLC 12 controls the first adjusting switch 2-3 and the exhaust fan 10-8 to be closed and the first burner furnace 2 to be flamed out, then the PLC 12 controls the reversing valve 4 to be reversed, so that the end d on the reversing valve 4 is communicated with the end c, the PLC 12 controls the second adjusting switch 3-3 to be opened, so that the second air inlet pipe 3-1 carries out gas charging operation on the second burner furnace 3, meanwhile, the exhaust fan 10-8 is started, and the exhaust fan 10-8 pumps air, air is sucked through an inlet end e and is discharged into a reversing valve 4 from an air inlet pipeline 5 to be converted in direction, the direction is converted through the reversing valve 4, the air sucked through an exhaust fan 10-8 is discharged into a second burner furnace 3 because the end d of the reversing valve 4 is communicated with the end c, then a PLC (programmable logic controller) 12 controls a second igniter 3-4 to ignite and burn mixed gas in the second burner nozzle 3, the heat of burning in the second burner furnace 3 reaches a furnace body 1 through heat conduction and roasts a sand mould, waste gas generated by burning passes through a first pipeline 2-2 and the end a to the end b of the reversing valve 4 and is discharged through a connecting pipe 7 and a smoke exhaust pipeline 6, the waste heat of the waste gas can be recycled and reused through a waste heat recycling device 10, wherein the first burner furnace 2 and the second burner furnace 3 burn alternately (the alternate burning is changed for burning every 8-12 seconds), therefore, the wax mold in the sand mold can be slowly and uniformly melted and permeates into the casting sand of the sand mold, the sand mold is hardened, a casting cavity is formed in the sand mold, the sand mold is roasted, the roasting of the sand mold is completed, the mode of alternately roasting the sand mold has the advantages that the sand mold roasting is uniformly heated, the quality of the casting cavity formed in the sand mold is high (the wax mold is completely melted), the sand mold is not easy to crack, the yield is high, the energy is saved, and the sand mold roasting device is worthy of popularization and application.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides an energy-conserving even formula of being heated bakes burning furnace over a slow fire, includes furnace body (1), characterized by: a first burner furnace (2) is arranged on the left side of the furnace body (1), and a second burner furnace (3) is arranged on the right side of the furnace body (1);

the cavity of the first burner furnace (2) is communicated with the cavity of the furnace body (1), a first air inlet pipe (2-1) communicated with the cavity of the first burner furnace (2) is fixed at the top end of the first burner furnace (2), a first pipeline (2-2) communicated with the cavity of the first burner furnace (2) is fixed at the bottom end of the first burner furnace (2), a first adjusting switch (2-3) is installed on the first air inlet pipe (2-1), and a first igniter (2-4) is installed in the first burner furnace (2);

the cavity of the second burner furnace (3) is communicated with the cavity of the furnace body (1), a second air inlet pipe (3-1) communicated with the cavity of the second burner furnace (3) is fixed at the top end of the second burner furnace (3), a second pipeline (3-2) communicated with the cavity of the second burner furnace (3) is fixed at the bottom end of the second burner furnace (3), a second adjusting switch (3-3) is installed on the second air inlet pipe (3-1), and a second igniter (3-4) is installed in the second burner furnace (3);

the lateral part of furnace body (1) is equipped with switching-over valve (4), the tip of first pipeline (2-2) is connected with the a end interface of switching-over valve (4), the tip of second pipeline (3-2) is connected with the c end interface of switching-over valve (4), the d end interface of switching-over valve (4) is connected with admission line (5), the lateral part of switching-over valve (4) is equipped with exhaust pipe (6), be connected with connecting pipe (7) between the b end interface of switching-over valve (4) and exhaust pipe (6), the inside of furnace body (1), first nozzle stove (2) and second nozzle stove (3) all is embedded to have insulating layer (8), all be fixed with tile layer (9) on the inner wall of furnace body (1), first nozzle stove (2) and second nozzle stove (3).

2. The energy efficient heated roaster of claim 1, wherein: a waste heat recovery device (10) is arranged on the lateral part of the furnace body (1), the waste heat recovery device (10) comprises a first continuous bending cooling pipe (10-1) arranged in a smoke exhaust pipeline (6), a cylinder body (10-2) with an inlet end and an outlet end is arranged on the lateral part of the smoke exhaust pipeline (6), a second continuous bending cooling pipe (10-3) is arranged in the cylinder body (10-2), a first heat insulation communication hose (10-4) is connected between the inlet end of the first continuous bending cooling pipe (10-1) and the outlet end of the second continuous bending cooling pipe (10-3), a second heat insulation communication hose (10-5) is connected between the outlet end of the first continuous bending cooling pipe (10-1) and the inlet end of the second continuous bending cooling pipe (10-3), the heat-insulation air-conditioning system is characterized in that a circulating pump (10-6) is installed at the position of the first heat-insulation communicating hose (10-4), the first continuously-bent cooling pipe (10-1), the second continuously-bent cooling pipe (10-3), the first heat-insulation communicating hose (10-4) and the second heat-insulation communicating hose (10-5) are filled with cooling liquid, an exhaust fan (10-8) is arranged on the side portion of the air inlet pipeline (5), the air outlet of the exhaust fan (10-8) is matched with the air inlet pipeline (5), and the air suction port of the exhaust fan (10-8) is connected with the air outlet of the barrel body (10-2) through a third heat-insulation communicating hose (10-9).

3. The energy efficient heated roaster of claim 2, wherein: furnace body (1) department installs temperature sensor probe (11), the lateral part of furnace body (1) is equipped with PLC controller (12), switch (13) and touch-control screen (14), switching-over valve (4) are the electromagnetic directional valve, first regulating switch (2-3), second regulating switch (3-3) are the electromagnetism on-off switch, PLC controller (12) and switch (13), touch-control screen (14), temperature sensor probe (11), air exhauster (10-8), circulating pump (10-6), switching-over valve (4), first regulating switch (2-3), second regulating switch (3-3), first igniter (2-4), second igniter (3-4) line connection are in the same place.