CN211739859U

CN211739859U - Heat preservation furnace

Info

Publication number: CN211739859U
Application number: CN202020340935.5U
Authority: CN
Inventors: 孙永江
Original assignee: Inner Mongolia Yite Aluminum Co Ltd
Current assignee: Inner Mongolia Yite Aluminum Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-23
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a heat preservation furnace, which comprises a shell with a cavity, an inner container arranged in the cavity of the shell, a heat preservation layer arranged between the shell and the inner container, a feed passage arranged at the top of the shell and connected with the inner container, an agitating mechanism arranged at the top of the shell and extending into the lower part of the inner container, a driving mechanism connected with the agitating mechanism and positioned at the top of the shell, a heating mechanism arranged on the inner wall of the inner container, a smoke exhaust passage arranged at the top of the shell and connected with the heating mechanism, a gas pipe and an air pipe connected with the heating mechanism, a flow regulating valve fixed on the gas pipe and the air pipe, a temperature control mechanism connected with the flow regulating valve and the heating mechanism, and a discharge passage arranged on the side wall of the lower end of the shell and connected with the inner container, the heat preservation layer and the heating mechanism reduce the heat loss of aluminum liquid in the inner container on the one hand, on the other hand, the heat is provided for the aluminum liquid, and the aluminum liquid is ensured to be kept in a certain temperature range.

Description

Heat preservation furnace

Technical Field

The utility model relates to an aluminium liquid processing equipment technical field, concretely relates to heat preservation stove.

Background

The main task of the holding furnace is to collect and store the aluminum liquid sent from the melting furnace, carry out some refining or alloying treatments on the aluminum liquid according to the metallurgical requirements, and in addition, the temperature of the liquid aluminum needs to be controlled to keep the temperature within a smaller temperature variation range.

At present, the temperature control mode of the holding furnace is regulated and controlled according to requirements through testing the temperature of the aluminum liquid, but the convection heat exchange effect of the currently adopted gas burner temperature control mode and the heat accumulating type gas burner two temperature control modes is poor, so that the aluminum liquid in the holding furnace is heated unevenly. In addition, the aluminum liquid is easy to absorb hydrogen after standing for a long time in the inner container, so that bubbles appear in the product, the components are not uniform due to different specific gravities of alloy elements, the product is unqualified, the rejection rate is increased, and the cost is increased. The content of hydrogen in the aluminium liquid is reduced by stirring the aluminium liquid or introducing nitrogen gas, because nitrogen gas is an inert gas, does not take place chemical reaction with it under aluminium liquid heat retaining temperature, can form many nitrogen bubbles after nitrogen gas gets into aluminium liquid, the hydrogen partial pressure among these nitrogen bubbles is 0, consequently, hydrogen in the aluminium liquid just constantly runs to in the nitrogen bubble to the surface of aluminium liquid can be floated to the nitrogen bubble, then is got rid of the holding furnace, reaches the content that reduces hydrogen in the aluminium liquid.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model provides a heat preservation furnace.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a heat preservation stove, including the casing that has the cavity, settle the inner bag in the cavity of casing, the heat preservation of setting between casing and inner bag, the feedstock channel who sets up at the top of casing and be connected with the inner bag, the rabbling mechanism of the lower part in setting at the top of casing and stretching into the inner bag, the actuating mechanism who is connected with rabbling mechanism and is located the top of casing, the heating mechanism of setting on the inner wall of inner bag, the exhaust passage who sets up at the top of casing and be connected with heating mechanism, gas pipe and the air hose of being connected with heating mechanism, fix the flow control valve on gas pipe and air hose, the temperature control mechanism who all is connected with flow control valve and heating mechanism, and set up on the lower extreme lateral wall of casing and the discharging channel who is connected with the inner bag, wherein, exhaust passage is located the heat preservation.

Further, the stirring mechanism comprises a stirring shaft connected with the driving mechanism, an air duct arranged in the stirring shaft and coaxial with the stirring shaft, a stirring blade connected to one end of the stirring shaft and provided with a cavity, and an air outlet hole arranged on the stirring blade and communicated with the cavity of the stirring blade, wherein the cavity of the stirring blade is communicated with the air duct.

Further, the heat preservation furnace also comprises a rotary joint which is arranged at the other end of the stirring shaft and is provided with an inner pipe and an outer pipe, a nitrogen pipe which is connected with the outer pipe and stands relative to the stirring shaft, a nitrogen tank which is connected with the nitrogen pipe, and an exhaust passage which is arranged at the top of the shell and is communicated with the inner container, wherein the inner pipe of the rotary joint is connected with the vent pipe and rotates along with the stirring shaft.

Further, heating mechanism is including setting up the combustion chamber on the lateral wall of inner bag, fixing the burning base in the combustion chamber, setting up some firearm, gas nozzle and the air nozzle on the burning base, wherein, smoke exhaust passage is connected with the gas chamber, and some firearm are connected with temperature control mechanism, and gas nozzle and gas union coupling, air nozzle and air piping connection.

Further, the temperature control mechanism comprises a temperature controller which is arranged outside the shell and connected with the flow control valve and the igniter, and a temperature sensor which is arranged on the side wall of the inner container and connected with the temperature controller.

Further, the driving mechanism comprises a motor positioned at the top of the shell, a driving rotating shaft connected with an output shaft of the motor, a driving gear arranged on the driving rotating shaft, and a driven gear arranged on the stirring shaft and meshed with the driving gear.

Furthermore, the feeding channel and the discharging channel are provided with control valves.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model provides a heat preservation stove sets up shell and inner bag, is equipped with the heat preservation simultaneously between shell and inner bag, and the heat preservation reduces the heat exchange of inner bag and external environment, avoids the thermal loss of aluminium liquid in the inner bag, and the heat preservation avoids the inner bag to lead to the problem that the inner bag rocked when pouring into aluminium liquid because the inequality of atress simultaneously. Furthermore, the utility model discloses still be equipped with a plurality of crisscross heating mechanism on the lateral wall of inner bag, ensure that aluminium liquid in the inner bag can both be heated, for the aluminium liquid in the inner bag provides the heat on the one hand, on the other hand avoids aluminium liquid uneven problem of being heated in the inner bag.

(2) The utility model discloses still be equipped with temperature control mechanism, be connected through some firearm, the flow control valve with the temperature controller in the temperature control mechanism in the heating mechanism, temperature controller detects some firearm and the flow control valve of the temperature control of aluminium liquid according to temperature sensor. When the temperature of the aluminum liquid in the inner container is too low, the temperature controller opens the flow regulating valve and the igniter to promote the fuel gas in the heating mechanism to burn and generate heat under the assistance of air so as to heat the aluminum liquid in the inner container; when the temperature of the aluminum liquid in the inner container is overhigh, the temperature controller closes the flow regulating valve and stops heating the aluminum liquid in the inner container. The aluminum liquid in the inner container is intelligently heated or stopped heating through the temperature controller, so that the energy waste is avoided.

(3) The utility model discloses be equipped with at the top of shell and stretch into the rabbling mechanism of lower part in the inner bag, the rabbling mechanism stirs aluminium liquid and avoids aluminium liquid to adsorb hydrogen when stewing. In addition, a stirring shaft in the stirring mechanism is provided with a vent pipe, a stirring blade is provided with a cavity, the surface of the stirring blade is provided with an air outlet, the cavity of the stirring blade is communicated with the vent pipe, and nitrogen sequentially passes through the vent pipe, the cavity of the stirring blade and the air outlet and enters the aluminum liquid in the inner container; when rabbling mechanism carries out the pivoted under the drive of motor, because the effect of centrifugal force, nitrogen gas is evenly spilled in the aluminium liquid in the inner bag through the venthole, avoid nitrogen gas maldistribution to lead to the discharge that hydrogen in the aluminium liquid can not be abundant on the one hand, the hydrogen partial pressure in the nitrogen bubble that on the other hand nitrogen gas formed in aluminium liquid is 0, therefore, hydrogen in the aluminium liquid just constantly runs into in the nitrogen bubble, be favorable to discharging the hydrogen in the aluminium liquid, it leads to the product bubble to appear and lead to the composition inhomogeneous because of alloy element's proportion is different to solve aluminium liquid and stew hydrogen easily in the inner bag for a long time, the nonconforming and rejection rate of product increase, lead to cost-push. Meanwhile, under the stirring action of the stirring mechanism, the movement speed of the aluminum liquid, the nitrogen and the hydrogen in the inner container is increased, so that the nitrogen can bring the hydrogen out of the aluminum liquid more conveniently.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of the heating mechanism of the present invention.

1-housing, 2-inner container, 3-insulating layer, 4-feed channel, 5-stirring mechanism, 6-motor, 7-heating mechanism, 8-smoke exhaust channel, 9-gas pipe, 10-air pipe, 11-flow regulating valve, 12-temperature control mechanism, 13-discharge channel, 14-aeration pipe, 15-stirring shaft, 16-stirring blade, 17-gas outlet, 18-nitrogen pipe, 19-nitrogen tank, 20-exhaust channel, 21-combustion chamber, 22-combustion base, 23-igniter, 24-gas nozzle, 25-air nozzle, 26-temperature controller, 27-temperature sensor, 28-control valve, 29-driving mechanism, 30-rotary joint, 31-inner pipe, 32-outer tube, 33-driving rotating shaft, 34-driving gear and 35-driven gear.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, which include but are not limited to the following examples.

As shown in fig. 1 and 2, the holding furnace includes a casing 1, an inner container 2, a heat insulating layer 3, a feeding passage 4, a stirring mechanism 5, a driving mechanism 29, a heating mechanism 7, a smoke exhaust passage 8, a gas pipe 9, an air pipe 10, a flow rate regulating valve 11, a temperature control mechanism 12, and a discharging passage 13. The shell is provided with a cavity, the inner container is arranged in the cavity of the shell, the heat insulation layer is arranged between the inner container and the shell and completely covers the inner container, and the feed inlet is arranged at the top of the shell and connected with the inner container. The stirring mechanism is arranged at the top of the shell and extends into the lower part of the inner container, and the driving mechanism is arranged at the top of the shell and is connected with the stirring mechanism and drives the stirring mechanism to rotate. The heating mechanisms are arranged on the side wall of the inner container and are arranged in a plurality of numbers, and each heating mechanism is arranged in a staggered manner and is distributed at each corner of the side wall of the inner container; the gas pipe, the air pipe are connected with the heating mechanism, the flow regulating valve is arranged on the gas pipe and the air pipe, and the temperature control mechanism is connected with the flow regulating valve and the heating mechanism. The smoke exhaust channel is arranged at the top of the shell and connected with the heating mechanism, and is positioned in the heat insulation layer; the discharge hole is arranged on the side wall of the lower section of the shell and is connected with the inner container. The heat-insulating layer in the embodiment preferably comprises polyurethane in high-temperature-resistant materials, and can be made of other materials with high-temperature resistance and heat-insulating functions in the actual production process.

In order to better control the amount of the molten aluminum in the whole holding furnace, control valves 28 are arranged on the discharging channel and the feeding channel.

According to the figure 1, the stirring mechanism comprises a stirring shaft 15, a stirring blade 16, an air duct 14 and an air outlet 17, wherein the stirring shaft penetrates through the shell and the insulating layer and extends into the inner container, one end of the stirring shaft is connected with the driving mechanism, the air duct is arranged in the stirring shaft and is coaxial with the stirring shaft, the stirring blade is connected to the other end of the stirring shaft, the stirring blade is provided with a cavity, the cavity of the stirring blade is communicated with the air duct, and the air outlet is arranged on the stirring blade and is communicated with the cavity of the stirring blade. In addition, when the stirring shaft extends into the inner container, the stirring shaft is connected with the inner container through a bearing, and a formed gap is sealed.

In order to reduce the hydrogen content of the aluminum liquid in the inner container, the other end of the stirring shaft is connected with a rotary joint 30 which is provided with an inner pipe 31 and an outer pipe 32, wherein the inner pipe is connected with a ventilation pipeline and rotates along with the stirring shaft, the outer pipe is connected with one end of a nitrogen pipe 14 and stands still relative to the stirring shaft, the other end of the nitrogen pipe is connected with a nitrogen tank 19, and meanwhile, the top of the shell is also provided with an exhaust passage 20 connected with the inner container. Further, a seal is provided between the inner tube and the outer tube.

According to fig. 1, the driving mechanism includes a motor 6, a driving shaft 33, a driving gear 34, and a driven gear 35. Wherein, the motor is located the top of casing, and the initiative pivot is connected on the output shaft of motor, and the driving gear setting is on the initiative output shaft, and driven gear sets up on the (mixing) shaft and with the driving gear meshing. The output shaft of the motor drives the driving rotating shaft to rotate, the driving gear is caused to rotate, so that the driven gear rotating shaft meshed with the driving gear is caused, and finally the driven gear drives the stirring shaft to rotate, so that the driving mechanism drives the stirring mechanism.

Referring to fig. 1 and 2, the heating means includes a combustion chamber 21, a combustion base 22, an igniter 23, a gas nozzle 24, and an air nozzle 25. The combustion chambers are arranged at each position on the side wall of the inner container in a staggered manner and are connected with the smoke exhaust channel; the combustion base is arranged in the combustion chamber, the igniter, the gas nozzle and the air nozzle are all arranged on the combustion base, the igniter is connected with the temperature control mechanism, and the gas nozzle and the air nozzle are respectively connected with the gas pipe and the air pipe.

According to the figure 1, the temperature control mechanism comprises a temperature controller 26 and a temperature sensor 27, the temperature controller is arranged outside the shell and is connected with the igniter and the flow regulating valve; the temperature sensor is arranged on the side wall of the inner container and is connected with the temperature controller. The temperature controller controls the igniter and the flow regulating valve to be opened or closed according to the temperature detected by the temperature sensor.

On the basis of the above, the specific implementation method of this embodiment is as follows:

open the control valve on the feedstock channel, aluminium liquid enters into the inner bag of heat preservation stove through feedstock channel, the aluminium liquid that enters into in the inner bag has certain heat, under aluminium liquid self temperature, starter motor, drive rabbling mechanism rotates, open the valve of nitrogen gas jar simultaneously, through nitrogen gas pipe pouring into nitrogen gas into toward the air pipe way, nitrogen gas is along the air pipe, the cavity of stirring leaf, during the venthole enters into the aluminium liquid in the inner bag, accelerate the hydrogen of nitrogen gas in with aluminium liquid and discharge under the help of rabbling mechanism stirring. If the temperature sensor monitors that the temperature of the aluminum liquid in the inner container is too low, the temperature controller controls the flow regulating valve to be opened, and meanwhile, the igniter is opened, so that the fuel gas is combusted in the combustion chamber, heat is provided for the aluminum liquid in the inner container, and the aluminum liquid in the inner container is kept in a certain temperature range.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims

1. A heat preservation furnace is characterized by comprising a shell (1) with a cavity, an inner container (2) arranged in the cavity of the shell (1), a heat preservation layer (3) arranged between the shell (1) and the inner container (2), a feeding channel (4) arranged at the top of the shell (1) and connected with the inner container (2), a stirring mechanism (5) arranged at the top of the shell (1) and extending into the lower part of the inner container, a driving mechanism (29) connected with the stirring mechanism (5) and positioned at the top of the shell (1), a heating mechanism (7) arranged on the inner wall of the inner container (2), a smoke exhaust channel (8) arranged at the top of the shell (1) and connected with the heating mechanism (7), a gas pipe (9) and an air pipe (10) connected with the heating mechanism (7), fix gas pipe (9) with flow control valve (11) on air pipe (10), with flow control valve (11) with temperature control mechanism (12) that heating mechanism (7) all are connected, and set up on the lower extreme lateral wall of casing (1) and with discharging channel (13) that inner bag (2) are connected, wherein, smoke exhaust passage is located the heat preservation.

2. A holding furnace according to claim 1, characterized in that the stirring mechanism (5) comprises a stirring shaft (15) connected to the driving mechanism (29), an aeration pipe (14) arranged in the stirring shaft (15) and coaxial with the stirring shaft, a stirring blade (16) connected to one end of the stirring shaft (15) and having a cavity, and an air outlet hole (17) arranged on the stirring blade (16) and communicating with the cavity of the stirring blade, wherein the cavity of the stirring blade communicates with the aeration pipe.

3. A holding furnace according to claim 2, further comprising a rotary joint (30) provided at the other end of the stirring shaft (15) and having an inner pipe (31) and an outer pipe (32), a nitrogen gas pipe (18) connected to the outer pipe (32) and standing still with respect to the stirring shaft (15), a nitrogen gas tank (19) connected to the nitrogen gas pipe (18), and an exhaust passage (20) provided at the top of the casing (1) and communicating with the inner container (2), wherein the inner pipe of the rotary joint is connected to the vent pipe and rotates together with the stirring shaft.

4. A holding furnace as claimed in claim 3, characterized in that the heating means (7) comprise a combustion chamber (21) arranged on the side wall of the inner container (2), a combustion base (22) fixed in the combustion chamber (21), an igniter (23) arranged on the combustion base (22), a gas nozzle (24) and an air nozzle (25), wherein the smoke evacuation channel is connected to the combustion chamber, the igniter is connected to the temperature control means, the gas nozzle is connected to the gas pipe, and the air nozzle is connected to the air pipe.

5. A holding furnace as claimed in claim 4, characterized in that said temperature control means (12) comprise a temperature controller (26) arranged outside said casing (1) and connected to both said flow control valve (11) and said igniter (23), and a temperature sensor (27) arranged on the side wall of said inner container (2) and connected to said temperature controller (26).

6. A holding furnace as claimed in claim 5, characterized in that said driving means (29) comprise an electric motor (6) located at the top of said housing (1), a driving shaft (33) connected to the output shaft of said electric motor (6), a driving gear (34) arranged on said driving shaft (33), and a driven gear (35) arranged on said stirring shaft (15) and engaged with said driving gear (34).

7. Holding furnace according to claim 6, characterized in that the feed channel and the discharge channel are provided with control valves (28).