WO2022073295A1

WO2022073295A1 - Electronic kiln having inlet air preheating function

Info

Publication number: WO2022073295A1
Application number: PCT/CN2020/134798
Authority: WO
Inventors: 陈龙豪; 钱虞清; 殷春芳; 芮军良; 张文俊
Original assignee: 苏州汇科机电设备有限公司
Priority date: 2020-10-10
Filing date: 2020-12-09
Publication date: 2022-04-14
Also published as: CN112197577A; CN112197577B

Abstract

An electronic kiln having an inlet air preheating function, which belongs to the technical field of electronic kilns. The electronic kiln comprises: a kiln body; upper heating devices located at an upper part in the height direction of the kiln body, and each having two ends supported on corresponding kiln walls of the kiln body, and a middle part located in a kiln chamber of the kiln body; lower heating devices located at a lower part in the height direction of the kiln body, and each having two ends supported on corresponding kiln walls of the kiln body, and a middle part located in the kiln chamber of the kiln body; saggar conveying rollers distributed at intervals in the length direction of the kiln body, and each having two ends extending outside the kiln body and supported on outer walls of the kiln body, and having a middle part located in the kiln chamber; a saggar conveying roller driving mechanism arranged corresponding to one side of the kiln body and in transmission connection with the saggar conveying rollers; and a kiln chamber air supply mechanism for supplying air to the kiln chamber, characterized in that the kiln chamber air supply mechanism comprises an air preheating device which is used for preheating air and introducing the preheated air into the kiln chamber, and is arranged on the kiln body and in communication with the kiln chamber. The present invention exhibits good heat exchange efficiency and ensures the cleaning effect of pre-heated air introduced into the kiln chamber.

Description

Electronic kiln with intake air preheating

technical field

The invention belongs to the technical field of electronic kilns, and in particular relates to an electronic kiln with an intake air preheating function.

Background technique

The above-mentioned electronic kilns are used for a wide range of sintered products. Specifically, they can be used for many materials such as electronic powder, electronic components, silicon nitride, aluminum nitride, lithium battery cathode materials, polysilicon, monocrystalline silicon The sintering of , ceramic materials, phosphors, rare earth materials, ferrite and its powder materials is an indispensable equipment for the production of various medium and high-end electronic products.

As the industry knows, in many cases it is necessary to preheat the hearth of the electronic kiln. The purpose of preheating is to avoid cracking of electronic components during sintering in the furnace, to prevent heat loss in the furnace, and to avoid the generation of condensed water in the furnace. . There are two main ways to preheat the furnace in the prior art: one is to simply introduce the gas into the furnace, and use the heat in the furnace to preheat the introduced gas, but this method will generate condensed water in the furnace, which will cause The pollution to the furnace; the second is to use the waste heat flue gas discharged from the chimney of the electronic kiln to preheat the introduced gas by means of heat exchange by means of a heat exchanger, but because the waste flue gas is rich in colloids, it is easy to heat The surface of the heat exchange coil of the heat exchanger is full, which reduces the heat exchange efficiency and shortens the service life of the heat exchanger significantly. However, if the heat exchanger needs to be cleaned, on the one hand, the furnace needs to be shut down, which will affect the normal working efficiency of the kiln and even affect the production capacity. Cleaning is time-consuming and labor-intensive and uneconomical (labor labor costs are relatively high).

Various technical information about providing heating gas to sintering furnaces can be found in the published Chinese patent documents. Typically, CN208012383U recommends “a sintering furnace flowing gas preheating device”, and CN210464085U introduces “energy-saving sintering furnace atmosphere preheating device”. And CN210119117U provides "preheating energy-saving sintering furnace", etc., but it is not limited to the aforementioned patents that do not give any enlightenment on how to apply and/or whether it can be applied to electronic kilns, and the technical solutions to be introduced below are It was against this background.

SUMMARY OF THE INVENTION

The task of the present invention is to provide a kind of high-end electronic powder material that helps to reflect the good heat exchange efficiency of the incoming gas, helps to avoid the pollution of the preheating gas, and helps to ensure the uniformity of the airflow in the furnace. Electronic kiln with intake air preheating function for the strict requirements of electronic components on the furnace environment.

The task of the present invention is accomplished as follows: an electronic kiln with an intake air preheating function, comprising a furnace body; an upper heating device located at the upper part of the furnace body in the height direction and distributed at intervals along the length direction of the furnace body, Both ends of the upper heating device are supported on the corresponding furnace walls of the furnace body, and the middle part is located in the furnace chamber of the furnace body; the lower heating devices located at the lower part of the height direction of the furnace body and also spaced along the length direction of the furnace body, The two ends of the lower heating device are supported on the corresponding furnace walls of the furnace body, and the middle part is located in the furnace chamber of the furnace body; the saggar conveying roller, the saggar conveying roller is at a position corresponding to the upper part of the lower heating device along the furnace body The two ends of the saggar conveying roller extend outside the furnace body and are rotatably supported on the outer wall of the furnace body, while the middle part is also located in the furnace; the saggar conveying roller drive mechanism, the saggar conveying roller drive mechanism Corresponding to one side of the furnace body and drivingly connected with the saggar conveying roller; a furnace gas supply mechanism for supplying gas to the furnace is characterized in that the furnace gas supply mechanism includes a gas supply for preheating the gas and making the preheating. The heated gas is introduced into the gas preheating device of the furnace, and the gas preheating device is arranged on the furnace body and communicated with the furnace.

In a specific embodiment of the present invention, the furnace air supply mechanism further includes an air supply fan, an air bleed main pipe, an air intake pipe under the furnace, a side air supply pipe and an air intake pipe on the furnace, and the air supply fan is accompanied by the furnace. One side of the body is supported on the floor, one end of the air bleed main pipe is matched with the air outlet of the air supply fan of the air supply fan, and the other end is closed. The other end of the gas pipe is upwardly spaced to form a plurality of branch pipes of the lower gas inlet pipe of the furnace hearth, the branch pipes of the lower gas inlet pipe of the furnace hearth penetrate into the furnace bottom lining of the furnace hearth and communicate with the hearth, and a lower gas inlet pipe is connected in series on the pipeline of the gas inlet pipe under the furnace hearth. Connect the hose, the lower end of the side air supply pipe is connected to the middle of the air bleed main pipe, and is provided with a side air supply pipe valve and a flowmeter connected in series, the side air supply pipe valve is located below the flowmeter, and the gas preheating device is connected to the side supply pipe. The upper end of the gas pipe is connected, the upper air inlet pipe of the furnace is arranged on the upper part of the furnace body and is connected with the middle part of the side gas supply pipe and communicated with the furnace chamber, and one end of the lower gas inlet pipe of the furnace is at the position corresponding to the flow meter. The upper position is connected to the side air supply pipe.

In another specific embodiment of the present invention, the gas preheating device includes a preheater, a left preheating gas lead-out pipe and a preheated gas right lead-out pipe, the preheater is fixed on the top of the furnace body, and the preheater is fixed on the top of the furnace body. The preheater has a preheater air inlet and a preheater air outlet, the upper end of the side air supply pipe is connected to the preheater air inlet, and a preheater air outlet three are connected to the preheater air outlet. The upper end of the left outlet pipe of the preheating gas is matched with the tee joint of the air outlet of the preheater, and the lower end is matched with the left air inlet port of the furnace body, and the left air inlet port of the furnace body is arranged on the left side of the furnace body. The upper end of the right outlet pipe of the preheating gas is matched with the three-way joint of the air outlet of the preheater, and the lower end is matched with the right air inlet port of the furnace body, and the right air inlet port of the furnace body is arranged at the the right side of the furnace body and communicate with the furnace; the preheater is an electric heating preheater equipped with an electric heating component.

In yet another specific embodiment of the present invention, the pipeline of the left preheating gas outlet pipe is connected in series with the left preheating gas outlet pipe hose and the air flow regulating valve of the left preheating gas outlet pipe; The pipeline of the hot gas right outlet pipe is connected in series with the preheating gas right outlet pipe hose and the preheating gas right outlet pipe air flow regulating valve; the left inlet port of the furnace body is connected to the furnace body fixed on the left side of the furnace body. The air cavity cover of the left air inlet interface of the furnace body is matched and communicated, and the air outlet of the left air cavity cover of the air cavity cover of the left air inlet interface of the furnace body is communicated with the furnace; the right air intake interface of the furnace body is fixed to the furnace body. The right air inlet port of the furnace body on the right side of the furnace body is matched and communicated with the air chamber cover, and the air outlet of the right air chamber case of the air chamber cover of the right air inlet port of the furnace body is communicated with the furnace.

In yet another specific embodiment of the present invention, a preheating gas temperature measuring device is provided on the three-way joint of the gas outlet of the preheater.

In another specific embodiment of the present invention, an upper left air inlet port and a lower left air inlet port are provided on the left side of the furnace body, and an upper right air inlet port and a lower right air intake port are provided on the right side of the furnace body Interface, the furnace upper air inlet pipeline, which is arranged on the upper part of the furnace body and connected with the middle part of the side air supply pipe, is simultaneously connected with the upper left air inlet interface and the upper right air inlet interface, or is simultaneously connected with the lower left air inlet interface and the lower right air inlet interface. Air connection.

In a more specific embodiment of the present invention, the upper air inlet pipeline of the furnace includes a tee connector, a left branch pipe, a right branch pipe, an air inlet pipe on the furnace chamber, and a three-way joint air intake pipe. One end is connected with the middle of the side air supply pipe, the other end is connected with the tee connection head, one end of the left branch pipe is connected with the upper left air inlet port or the lower left air inlet port, and the other end extends upward to the furnace body. The top is connected with the tee connection head, one end of the right shunt pipe is connected with the upper right air inlet port or the lower right air inlet port, and the other end extends upward to the top of the furnace body and is connected with the tee connection head, and the furnace chamber moves upward. The gas pipe is connected between the upper left air inlet port and the upper right air inlet port or between the lower left air inlet port and the lower right air inlet port in the furnace chamber. The area of the furnace is spaced with air outlet holes of the air inlet pipe on the furnace.

In a further specific embodiment of the present invention, a left shunt hose is connected in series on the pipeline of the left shunt, and a right shunt hose is connected in series on the pipeline of the right shunt.

In yet another specific embodiment of the present invention, on the left side of the furnace body and at a position corresponding to the drive mechanism of the saggar conveying roller drive connected to the saggar conveying roller, there is a motor support, a drive The wheel bracket and the saggar conveying roller drive the bracket, the motor bracket is fixed with the left side of the furnace body supporting chassis at the bottom of the furnace body, the transmission wheel bracket is fixed on the left side of the furnace body and corresponds to the upper part of the motor bracket, the saggar conveying roller The driving bracket is also fixed on the left side of the furnace body and corresponds to the upper part of the transmission wheel bracket; the saggar conveying roller driving mechanism is distributed on the motor bracket, the transmission wheel bracket and the saggar conveying roller driving bracket.

In a further specific embodiment of the present invention, the saggar conveying roller drive mechanism includes a motor, a motor-driven sprocket, a transition drive sprocket shaft seat, a transition drive sprocket, a reduction box, and a reduction box power input sprocket , Gearbox power output sprocket, saggar conveying roller drive sprocket, first drive chain I, second drive chain II and third drive chain III, the motor is arranged on the motor bracket, and the motor drive sprocket is fixed on the motor On the power output shaft of the motor, the transition drive sprocket shaft seat is set on the drive wheel bracket in a paired state, and the transition drive sprocket is a double row sprocket and is fixed on the transition drive sprocket shaft, and the transition drive sprocket shaft rotates It is supported on the transition drive sprocket axle seat, the reduction box is fixed on the drive bracket of the saggar conveying roller, the reduction box power input sprocket is fixed on the reduction box power input shaft of the reduction box, and the reduction box power output sprocket is fixed on the On the reduction box power output shaft of the reduction box, the driving sprocket of the saggar conveying roller is a double row sprocket and is fixed at the left end of the saggar conveying roller. The transition chain is connected by transmission, the lower end of the first transmission chain I is sleeved on the motor drive sprocket, the upper end is sleeved on the transitional transmission sprocket, the lower end of the second transmission chain II is sleeved on the transitional transmission sprocket, and the upper end is sleeved on the transitional transmission sprocket. On the power input sprocket of the reduction box, the upper end of the third transmission chain III is sleeved on the power output sprocket of the reduction box, and the lower end is sleeved on the driving sprocket of the sagg conveying roller.

The technical effect of the technical solution provided by the present invention is: because the gas preheated by the gas preheating device is introduced into the furnace by the furnace gas supply mechanism, it can reflect good heat exchange efficiency; since the gas preheating device uses an electric heating component The gas is heated, so that it can not only ensure the cleaning effect of the preheated air introduced into the furnace, but also avoid the pollution and damage of the gas preheating device; because the furnace gas supply mechanism can supply gas to the furnace up, down, left and right, Therefore, it can reflect the uniform airflow effect and meet the strict requirements of high-end electronic powder materials and electronic components on the furnace environment.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic diagram of the right side of FIG. 1 .

Detailed ways

In order to be able to understand the technical essence and beneficial effects of the present invention more clearly, the applicant will describe in detail below by way of examples, but the description of the examples is not intended to limit the solution of the present invention. Equivalent transformations that are only formal but not substantial should be regarded as the scope of the technical solutions of the present invention.

In the following description, all concepts related to the directionality or orientation of up, down, left, right, front and rear are taken as an example of the position state in FIG. The special limitation of the technical solution.

Referring to FIG. 1 and in conjunction with FIG. 2, the furnace body 1 is shown. According to professional knowledge and the schematic diagram of FIG. 2, since the furnace body 1 is usually composed of a preheating section, a heating section, a constant temperature section, a cooling section and a cooling section, therefore The length is relatively long, and the electronic powder materials to be sintered, such as lithium battery positive electrode materials or electronic component products, are carried by the sagger from the feeding port of the preheating section into the furnace, and slowly pass through the aforementioned heating section, constant temperature section and cooling section. The discharge port at the end of the section runs out to complete the sintering process; the upper heating device 2 located in the upper part of the height direction of the furnace body 1 and distributed at intervals along the length direction of the furnace body 1 is shown. The ends are supported on the left and right walls in the position shown in Figure 1 on the corresponding furnace walls of the furnace body 1, and the middle part is located in the furnace chamber of the furnace body 1; the lower part in the height direction of the furnace body 1 is shown and also along the The lower heating devices 3 are distributed at intervals along the length direction of the furnace body 1. Both ends of the lower heating device 3 are supported on the left and right walls of the corresponding furnace wall of the furnace body 1 in the position shown in FIG. 1, and the middle part is located in the furnace body. 1; shows the saggar conveying roller 4, the saggar conveying roller 4 is spaced along the length direction of the furnace body 1 at the position corresponding to the upper part of the lower heating device 3, and the two saggar conveying rollers 4 are spaced apart. The ends extend out of the furnace body 1 and are rotatably supported on the outer wall of the furnace body 1, while the middle part is also located in the furnace; the sagger conveying roller drive mechanism 5 is shown, which corresponds to the furnace body 1 The one side of the saggar is arranged on the left as shown in FIG. 1 and is connected with the saggar conveying roller 4 in a driving manner; the furnace gas supply mechanism 6 for supplying gas to the aforementioned furnace is shown.

Since the above-mentioned upper heating device 2 , lower heating device 3 and saggar conveying roller 4 are set up and their mechanism of action are well-known technologies, for example, please refer to the technical information on roller furnaces mentioned by the applicant in the above background technology column. The applicant will not repeat it.

As the technical point of the technical solution provided by the present invention: the aforementioned furnace gas supply mechanism 6 includes a gas preheating device 61 for preheating the gas and introducing the preheated gas into the aforementioned furnace chamber, and the gas preheating device 61 is arranged in the The aforementioned furnace body 1 communicates with the aforementioned furnace chamber.

As mentioned above, the length of the entire furnace body 1 is relatively long, so it can be seen from the schematic diagram in FIG. 2 is only a part of the entire furnace body 1 , such as the heating section and the constant temperature section of the furnace body 1 .

1 and 2, the aforementioned furnace air supply mechanism 6 also includes an air supply fan 62, an air bleed main pipe 63, a lower air intake pipe 64, a side air supply pipe 65 and an upper air intake pipe 66 in the furnace chamber. The air supply fan 62 is accompanied by One side of the aforementioned furnace body 1, that is, the left side of FIG. 1 is supported on the floor, one end of the air bleed main pipe 63 is matched with the air outlet of the air supply fan of the air supply fan 62, and the other end (ie the end face) is closed. One end of the lower furnace air inlet pipe 64 is connected to the side air supply pipe 65, and the other end of the lower furnace air inlet pipe 64 is spaced upward to form a plurality of branch pipes 641, such as three (but not limited to three) left, middle, right, furnace lower air inlet pipes. The lower intake pipe branch pipe 641 penetrates into the furnace bottom lining of the furnace and communicates with the furnace. Specifically, the lower intake branch pipe 641 of the furnace passes through the furnace bottom lining, that is, at a position corresponding to the intake pipe hole opened on the furnace bottom lining Inserted into the furnace and communicated with the furnace, the pipeline of the lower air inlet pipe 64 is connected in series with a lower air inlet pipe connecting hose 642 for adjusting the position of the lower air inlet pipe and facilitating assembly. The lower end of the side air supply pipe 65 is connected to the guide The central part of the gas main pipe 63 is connected, and a side gas supply pipe valve 651 and a flowmeter 652 are arranged in series. 61 is connected with the upper end of the side gas supply pipe 65, the upper air inlet pipe 66 of the furnace chamber is arranged on the upper part of the aforementioned furnace body 1 and is connected with the middle part of the aforementioned side gas supply pipe 65 and communicated with the aforementioned furnace chamber. The position above the flowmeter 652 corresponds to the position of the air outlet of the flowmeter 652 and is connected to the side air supply pipe 65 .

The aforementioned gas preheating device 61 includes a preheater 611, a left preheating gas outlet pipe 612 and a right preheating gas outlet pipe 613. The preheater 611 is fixed on the top of the aforementioned furnace body 1 through a preheater support seat 6114, but also The preheater 611 can be fixed on other reasonable positions of the furnace body 1. The preheater 611 has a preheater air inlet 6111 and a preheater air outlet 6112. The upper end of the aforementioned side air supply pipe 65 is connected to the preheater. The air inlet 6111 is connected, and a preheater air outlet tee joint 61121 is connected to the preheater air outlet 6112. It is matched with the left air inlet port 12 of the furnace body, and the left air inlet port 12 of the furnace body is arranged on the left side of the aforementioned furnace body 1 and communicated with the aforementioned furnace chamber. The tee joint 61121 is matched, and the lower end is matched with the right air inlet port 13 of the furnace body, and the right air inlet port 13 of the furnace body is arranged on the right side of the aforementioned furnace body 1 and communicated with the aforementioned furnace chamber; the aforementioned preheater 611 is matched with Electric heating preheater with electric heating assembly 6113. Since the air supply fan 62 provides clean air, and because the preheater 611 adopts an electric heating preheater, the cleanliness of the preheated air entering the furnace can be guaranteed.

On the pipeline of the aforementioned left preheated gas outlet pipe 612 are connected in series a left preheated gas outlet pipe hose 6121 and a left preheated gas outlet pipe airflow regulating valve 6122, which function as described for the lower intake pipe connecting hose 643; The pipeline of the aforesaid right outlet pipe 613 for preheating gas is connected in series with a hose 6131 of the right outlet pipe for preheating gas and an airflow regulating valve 6132 for the right outlet pipe of preheating gas; The left air cavity cover 121 of the left air inlet interface of the furnace body is matched and communicated, and the left air cavity cover air outlet 1211 of the left air cavity cover 121 of the left air inlet interface of the furnace body is communicated with the aforementioned furnace; The air inlet port 13 is matched and communicated with the air cavity cover 131 of the right air inlet port of the furnace body fixed on the right side of the furnace body 1 , and the right air cavity cover of the air cavity cover 131 of the right air inlet port of the furnace body exits. The gas port 1311 communicates with the aforementioned furnace.

A preheating gas temperature measuring device 61122 is arranged on the tee joint 61121 of the air outlet of the preheater.

1 and 2, the upper left air inlet port 11a and the lower left air inlet port 11b are provided on the left side of the aforementioned furnace body 1, and the upper right air inlet port 11c and the lower right air inlet port are provided on the right side of the furnace body 1 11d, the above-mentioned furnace upper air inlet pipeline 66 arranged on the upper part of the above-mentioned furnace body 1 and connected with the middle part of the above-mentioned side air supply pipe 65 is simultaneously connected with the upper left air inlet port 11a and the upper right air inlet port 11c or simultaneously with the lower left

air inlet port

11b and 11b. The lower right intake port 11d is connected.

Since the embodiment of the present invention is aimed at the furnace body 1 being a roller furnace, when the saggar conveying roller 4 is driven to move by the saggar conveying roller driving mechanism 5 which will be described in detail below, the saggar conveying roller 4 drives the stacking The state is that the saggar supported on the saggar conveying roller 4 in the stacking state moves from the above-mentioned inlet port to the outlet port. When the number of stacked layers of the aforementioned saggers, that is, the number of stacking layers is large (for example, four layers), that is, when the height is high, the position of the furnace air inlet pipe 664 to be mentioned below is moved upward to the upper left air inlet port 11a and the upper right air inlet port 11a. Between the air inlet ports 11c, on the contrary, when the number of layers of the saggars stacked is small (eg, two layers), it is moved downward to between the lower left air inlet port 11b and the lower right air inlet port 11d.

The aforesaid upper air inlet pipeline 66 of the furnace includes a tee connection head 661, a left shunt pipe 662, a right shunt 663, an upper air inlet pipe 664 and a tee joint air intake pipe 665. The middle part is connected, the other end is connected with the tee connector 661, one end of the left shunt pipe 662 is connected with the aforementioned upper left air inlet port 11a or lower left air inlet port 11b, and the other end extends upward to the top of the aforementioned furnace body 1 and is connected with the three One end of the right shunt pipe 663 is connected to the above-mentioned upper right air inlet port 11c or the lower right air inlet port 11d, while the other end extends upward to the top of the foregoing furnace body 1 and is connected to the tee connection head 661, and the furnace chamber moves upward. The gas pipe 664 is connected between the upper left air inlet port 11a and the upper right air inlet port 11c or between the lower left air inlet port 11b and the lower right air inlet port 11d in the aforementioned furnace chamber, and the air inlet pipe 664 faces the lower side of the upper furnace chamber. And in the area corresponding to the furnace chamber, there are air outlet holes 6641 on the upper air intake pipe of the furnace chamber.

According to the applicant's description of the stacking height of the saggars above, when the stacking height is high, that is, when the number of layers of the saggars is high, then one end of the aforementioned left shunt pipe 662 and one end of the right shunt pipe 663 are respectively connected to the upper left air inlet interface. 11a and the upper right air inlet port 11c are connected, and vice versa.

A left shunt hose 6621 is connected in series on the pipeline of the aforementioned left shunt 663 , and a right shunt hose 6631 is connected in series on the pipeline of the aforementioned right shunt 663 .

Please refer to FIG. 2 and in conjunction with FIG. 1 , in FIG. 2 , a lower smoke exhaust duct 7 is shown, a flap valve 71 is provided on the lower smoke exhaust duct 7 , and the lower smoke exhaust duct 7 is connected to the bottom lining of the furnace. The lower exhaust flue 19 communicates with the furnace through the lower exhaust opening 191 . An upper smoke exhaust port 18 is provided on the top of the furnace body 1 and at positions corresponding to each temperature zone. An upper smoke exhaust pipe 181 is attached to the upper smoke exhaust port 18, and the upper smoke exhaust pipe 181 is connected to the flue gas exhaust main pipe. 8 is connected, the aforementioned lower smoke exhaust pipe 7 extends upward and is matched with the flue gas discharge main pipe 8 .

Referring to FIG. 1 , on the left side of the aforementioned furnace body 1 and at the position corresponding to the aforementioned sagg delivery roller drive mechanism 5 that is drive-connected to the aforementioned saggar delivery roller 4 , there is a motor bracket 14 , a transmission wheel bracket 15 and a sagger delivery roller The drive bracket 16, the motor bracket 14 are fixed to the left side of the furnace body supporting chassis 17 at the bottom of the furnace body 1, and the transmission wheel bracket 15 is fixed to the left side of the furnace body 1 and corresponds to the top of the motor bracket 14. The saggar conveying roller The drive bracket 16 is also fixed on the left side of the furnace body 1 and corresponds to the upper part of the transmission wheel bracket 15; the aforementioned saggar conveying roller drive mechanism 5 is distributed on the motor bracket 14, the transmission wheel bracket 15 and the saggar conveying roller drive bracket 16. .

The aforementioned saggar conveying roller drive mechanism 5 includes a motor 51, a motor drive sprocket 52, a transition drive sprocket shaft seat 53, a transition drive sprocket 54, a reduction box 55, a reduction box power input sprocket 56, and a reduction box power output sprocket. 57. Saggar conveying roller drive sprocket 58, first drive chain I 59a, second drive chain II 59b and third drive chain III 59c, the motor 51 is arranged on the aforementioned motor bracket 14, and the motor drive sprocket 52 is fixed to the motor of the motor 51 On the power output shaft 511, the transition drive sprocket shaft seat 53 is arranged on the drive wheel bracket 15 in a paired state, and the transition drive sprocket 54 is a double row sprocket and is fixed on the transition drive sprocket shaft 541. The sprocket shaft 541 is rotatably supported on the transition drive sprocket shaft seat 53, the reduction box 55 is fixed on the aforementioned saggar conveying roller drive bracket 16, the reduction box power input sprocket 56 is fixed on the reduction box power input shaft of the reduction box 55, The gear box power take-off sprocket 57 is fixed on the gear box power take-off shaft of the gear box 55, and the sagg conveying roller driving sprocket 58 is a double row sprocket and is fixed on the left end of the saggar conveying roller 4, adjacent to the saggar conveying roller. The drive sprockets 58 of the saggar conveying rollers on The lower end of the chain II 59b is sleeved on the transition drive sprocket 54, the upper end is sleeved on the reduction box power input sprocket 56, the upper end of the third transmission chain III 59c is sleeved on the reduction box power output sprocket 57, and the lower end is sleeved on the reduction box power output sprocket 57. Saggar conveying roller drive sprocket 58. As a preferred solution, a chain tensioning sprocket 59d can also be rotatably provided on the saggar conveying roller drive bracket 16 and at a position corresponding to the middle of the third transmission chain III 59c.

The motor 51 works, the motor power output shaft 511 drives the motor drive sprocket 52, the motor drive sprocket 52 drives the transition transmission sprocket 54 (double row sprocket) through the first transmission chain I59a, and then the transition transmission sprocket 54 The power input sprocket 56 of the reduction box is driven by the second transmission chain II 59b, the power output sprocket 57 of the reduction box fixed on it is driven by the power output shaft of the reduction box 55, and the saggar conveying roller is driven by the third transmission chain III 59c. The sprocket 58 is driven by the saggar conveying roller drive sprocket 58 to drive the saggar conveying shaft 4. Since the saggar conveying roller drive sprocket 58 is a double row sprocket, and because the saggar conveying rollers 4 are adjacent to each other, the The drive sprockets 58 of the bowl conveying rollers are connected by a transition chain, so that all the saggar conveying rollers 4 can move simultaneously and synchronously to drive the saggars from the feeding port, that is, the feeding port to the discharging port.

The applicant needs to explain that the driving method of the roller furnace to the saggar conveying roller 4 is not the same as the above-mentioned sprocket-driven structure, for example, a gear-driven structure can also be used.

In the above process, the upper and

lower heating devices

2 and 3 are both in the heating state, that is, the upper and lower heating rods are in the working state, and the aforementioned furnace gas supply mechanism 6 is also in the working state. The air supply fan 62 is introduced into the main air intake pipe 63, and the lower furnace air intake pipe 64 is used to introduce the gas into the lower part of the furnace by the side air supply pipe 65, so that the upper furnace air intake pipe 664 of the upper furnace air intake pipeline 66 is discharged by means of the upper furnace upper air intake pipe outlet 6641. The gas enters the upper part of the furnace. When the furnace chamber is to be preheated before the furnace is started, the gas introduced by the side gas supply pipe 65 will be preheated by the preheater 611 and the left preheating gas outlet pipe 612 and the preheating gas right outlet pipe 613 will be preheated by the preheater 611 The preheated gas after 611 preheating is introduced into the furnace chamber from the left and right sides of the furnace body 1 (taking the position in FIG. 1 as an example).

The applicant also needs to explain that in most cases, that is, for the vast majority of sintered products, the gas introduced into the furnace chamber from the left and right lead-out

pipes

612 and 613 of the preheating gas should be preheated, so that the The gas in the furnace is in a hot state to avoid contact with cold gas during the sintering process of the product, preventing cracking or deformation of the product. In view of the foregoing, under normal circumstances, as long as there are products in the furnace, the aforementioned preheater 611 is in an electrified working state. Of course, the opening degree of the aforementioned preheating gas left and right outlet pipe air flow regulating valves 6122 and 6123 and even short-term closing (ie, short-time closing) are determined by the user according to the requirements of the product sintering process and the temperature change in the furnace, that is, according to the needs make adjustments.

To sum up, the technical solution provided by the present invention makes up for the shortcomings in the prior art, successfully completes the invention task, and faithfully realizes the technical effect stated in the above technical effect column by the applicant.

Claims

An electronic kiln with an intake air preheating function, comprising a furnace body (1); and upper heating devices (2) located at the upper part of the furnace body (1) in the height direction and distributed at intervals along the length direction of the furnace body (1). ), the two ends of the upper heating device (2) are supported on the corresponding furnace walls of the furnace body (1), and the middle part is located in the furnace chamber of the furnace body (1); the lower part in the height direction of the furnace body (1) and the same Lower heating devices (3) distributed at intervals along the length direction of the furnace body (1), both ends of the lower heating device (3) are supported on the corresponding furnace walls of the furnace body (1), and the middle part is located in the furnace body (1) ) inside the furnace chamber; the saggar conveying roller (4) is spaced along the length direction of the furnace body (1) at a position corresponding to the upper part of the lower heating device (3). Both ends of the conveying roller (4) extend out of the furnace body (1) and are rotatably supported on the outer wall of the furnace body (1), while the middle part is also located in the furnace; the saggar conveying roller drive mechanism (5), the saggar The conveying roller drive mechanism (5) is provided corresponding to one side of the furnace body (1) and is connected with the saggar conveying roller (4) in a driving manner; the furnace chamber gas supply mechanism (6) for supplying gas to the furnace chamber is characterized in that The furnace gas supply mechanism (6) includes a gas preheating device (61) for preheating gas and introducing the preheated gas into the furnace, the gas preheating device (61) being arranged in the furnace on the body (1) and communicate with the furnace.
The electronic kiln with intake air preheating function according to claim 1, characterized in that the furnace chamber air supply mechanism (6) further comprises an air supply fan (62), an air bleed main pipe (63), a furnace chamber downward feeder An air pipe (64), a side air supply pipe (65) and an air inlet pipe (66) on the furnace chamber, the air supply fan (62) is supported on the floor along with one side of the furnace body (1), and the air bleed main pipe (63) One end is connected with the air supply air outlet of the air supply fan (62), and the other end is closed. The other end of the furnace is spaced upward to form a plurality of branch pipes (641) of the lower air intake pipe of the furnace. A lower air intake pipe connecting hose (642) is connected in series on the pipeline, the lower end of the side air supply pipe (65) is connected to the middle of the air bleed main pipe (63), and a side air supply pipe valve (651) and a flowmeter are connected in series. (652), the side gas supply pipe valve (651) is located below the flow meter (652), the gas preheating device (61) is connected to the upper end of the side gas supply pipe (65), and the gas inlet pipe (66) on the furnace chamber is provided at the The upper part of the furnace body (1) is connected to the middle part of the side gas supply pipe (65) and communicated with the furnace chamber. The upper position is connected to the side air supply pipe (65).
The electronic kiln with intake air preheating function according to claim 2, characterized in that the gas preheating device (61) comprises a preheater (611), a left lead-out pipe (612) for preheating gas, and a preheater (612). The gas right outlet pipe (613), the preheater (611) is fixed on the top of the furnace body (1), the preheater (611) has a preheater air inlet (6111) and a preheater outlet Air port (6112), the upper end of the side air supply pipe (65) is connected to the preheater air inlet (6111), and a preheater air outlet tee joint (61121) is connected to the preheater air outlet (6112). ), the upper end of the left preheating gas outlet pipe (612) is matched with the preheater air outlet tee joint (61121), and the lower end is matched with the left air inlet port (12) of the furnace body, and the left air inlet port of the furnace body is matched (12) It is arranged on the left side of the furnace body (1) and communicated with the furnace chamber. The upper end of the preheating gas right outlet pipe (613) is matched with the preheater gas outlet tee joint (61121), and the lower end is connected with The right air inlet port (13) of the furnace body is matched, and the right air inlet port (13) of the furnace body is arranged on the right side of the furnace body (1) and communicated with the furnace chamber; the preheater (611) It is an electric heating preheater equipped with an electric heating assembly (6113).
The electronic kiln with an intake air preheating function according to claim 3, characterized in that a left preheating gas extraction pipe hose (6121) is connected in series on the pipeline of the left preheating gas extraction pipe (612). and the air flow regulating valve (6122) of the left preheating gas outlet pipe; the preheating gas right outlet pipe (6131) and the preheating gas right outlet pipe are connected in series on the pipeline of the preheating gas right outlet pipe (613). Air flow regulating valve (6132); the left air inlet port (12) of the furnace body is matched with and communicated with the air cavity cover (121) of the left air inlet port of the furnace body fixed on the left side of the furnace body (1), The left air cavity cover air outlet (1211) of the left air inlet port air cavity cover (121) of the furnace body communicates with the furnace chamber; the furnace body right air inlet port (13) is connected to the furnace body (121). 1) The air chamber cover (131) of the right air inlet interface of the furnace body on the right side is matched and communicated, and the air outlet (1311) of the right air chamber cover of the air chamber cover (131) of the right air inlet interface of the furnace body is connected with the air chamber cover (1311). The furnaces are communicated.
The electronic kiln with intake air preheating function according to claim 3, characterized in that a preheating air temperature measuring device (61122) is provided on the three-way joint (61121) of the air outlet of the preheater.
The electronic kiln with intake air preheating function according to claim 2, characterized in that an upper left intake port (11a) and a lower left intake port (11b) are provided on the left side of the furnace body (1), A right upper air inlet port (11c) and a right lower air inlet port (11d) are provided on the right side of the furnace body (1), which are arranged on the upper part of the furnace body (1) and are connected to the side air supply pipe (65). The furnace upper air inlet pipeline (66) connected in the middle is connected with the upper left air inlet port (11a) and the upper right air inlet port (11c) at the same time or with the lower left air inlet port (11b) and the lower right air inlet port (11d) at the same time .
The electronic kiln with an intake air preheating function according to claim 6, characterized in that the intake air pipeline (66) on the furnace chamber comprises a three-way connector (661), a left shunt pipe (662), a right shunt pipe (661). 663), the upper air inlet pipe (664) and the tee joint bleed pipe (665), one end of the tee joint bleed pipe (665) is connected with the middle of the side air supply pipe (65), and the other end is connected with the tee connector (661) is connected, one end of the left branch pipe (662) is connected with the upper left air inlet port (11a) or the lower left air inlet port (11b), and the other end extends upward to the top of the furnace body (1) and is connected to the upper left air inlet port (11a) or the lower left air inlet port (11b). The three-way connector (661) is connected, one end of the right shunt pipe (663) is connected to the upper right air inlet port (11c) or the lower right air inlet port (11d), and the other end extends upward to the furnace body (1) The top of the furnace is connected with the tee connector (661), and the upper air inlet pipe (664) of the furnace is connected between the upper left air inlet port (11a) and the upper right air inlet port (11c) in the furnace chamber or connected to the lower left air inlet port. Between (11b) and the lower right air inlet port (11d), the upper air inlet pipe (664) of the furnace faces the lower side and the furnace upper air inlet pipe outlet holes (6641) are spaced in the area corresponding to the furnace chamber.
The electronic kiln with an intake air preheating function according to claim 7, characterized in that a left branch pipe hose (6621) is connected in series on the pipeline of the left branch pipe (663), and a left branch pipe hose (6621) is connected in series on the pipeline of the left branch pipe (663). A right shunt hose (6631) is connected in series on the pipeline of the pipe (663).
The electronic kiln with intake air preheating function according to claim 1, characterized in that it is on the left side of the furnace body (1) and in the drive connection corresponding to the saggar conveying roller (4). A motor support (14), a transmission wheel support (15) and a saggar conveying roller drive support (16) are located at the position of the saggar conveying roller drive mechanism (5). The motor support (14) is connected to the furnace at the bottom of the furnace body (1). The left side of the body supporting chassis (17) is fixed, the transmission wheel bracket (15) is fixed on the left side of the furnace body (1) and corresponds to the top of the motor bracket (14), and the saggar conveying roller drive bracket (16) is also fixed. On the left side of the furnace body (1) and corresponding to the top of the transmission wheel bracket (15); the saggar conveying roller drive mechanism (5) is distributed on the motor bracket (14), the transmission wheel bracket (15) and the saggar On the conveying roller drive bracket (16).
The electronic kiln with intake air preheating function according to claim 9, characterized in that the saggar conveying roller drive mechanism (5) comprises a motor (51), a motor-driven sprocket (52), a transition drive chain Axle seat (53), transition drive sprocket (54), reduction box (55), reduction box power input sprocket (56), reduction box power output sprocket (57), saggar conveying roller drive sprocket (58) , the first transmission chain I (59a), the second transmission chain II (59b) and the third transmission chain III (59c), the motor (51) is arranged on the motor bracket (14), the motor drives the sprocket (52) Fixed on the motor power output shaft (511) of the motor (51), the transition drive sprocket shaft seat (53) is arranged on the drive wheel bracket (15) in a paired state, and the transition drive sprocket (54) is a double row The sprocket is fixed on the transition drive sprocket shaft (541), and the transition drive sprocket shaft (541) is rotatably supported on the transition drive sprocket shaft seat (53), and the reduction box (55) is fixed on the saggar conveying roller On the drive bracket (16), the reduction box power input sprocket (56) is fixed on the reduction box power input shaft of the reduction box (55), and the reduction box power output sprocket (57) is fixed on the reduction box of the reduction box (55) On the power take-off shaft, the saggar conveying roller drive sprocket (58) is a double row sprocket and is fixed on the left end of the saggar conveying roller (4), and the saggar conveying roller drive chain on the adjacent saggar conveying roller (4) The wheels (58) are connected by a transition chain. The lower end of the first transmission chain I (59a) is sleeved on the motor drive sprocket (52), and the upper end is sleeved on the transition transmission sprocket (54). The lower end of the chain II (59b) is sleeved on the transition drive sprocket (54), the upper end is sleeved on the reduction box power input sprocket (56), and the upper end of the third transmission chain III (59c) is sleeved on the reduction box power input The lower end of the output sprocket (57) is sleeved on the drive sprocket (58) of the sagg conveying roller.