Horizontal vacuum induction furnace with dust collecting device

Abstract

The utility model relates to a horizontal vacuum induction furnace with a dust collecting device, belongs to the technical field of vacuum metallurgy devices, and solves the problems that in-furnace dust discharged from a furnace door after smelting of a vacuum induction furnace in the prior art pollutes the environment, and existing dust removing equipment is high in manufacturing cost and low in purification efficiency. The vacuum induction furnace comprises a furnace shell, a vacuum breaking valve and a dust collecting device, the dust collecting device is installed on the furnace shell and comprises a water cooler, a gate valve and a dust remover which are sequentially connected with the furnace shell, the water cooler is used for cooling dust to be collected, and the gate valve is connected with the dust remover. The gate valve is used for connecting and disconnecting the dust remover and the furnace shell, and the dust remover is used for collecting dust. The vacuum induction furnace comprises the dust collecting device directly installed on the furnace shell, is simple in structure, high in dust removal efficiency, capable of saving occupied space and low in cost, and improves the dust removal efficiency under the condition that smelting production is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum metallurgy device technical field especially relates to a horizontal vacuum induction furnace with dust collecting device. BACKGROUND

[0002] Vacuum induction furnace is widely used in the field of vacuum metallurgy, which is a smelting equipment for heating, melting, refining, alloying and pouring under vacuum conditions. It is mainly composed of a vacuum system, an electric heating system, a sealable furnace shell, an induction coil and a crucible.

[0003] During smelting, raw materials and crucibles used for smelting will produce volatile substances and form dust. Part of the dust is extracted by the vacuum system, part of the dust settles on the inner wall of the furnace shell, and part of the dust still diffuses in the furnace after stopping vacuum extraction at the end of smelting. When the vacuum furnace breaks the air valve, the air outside the furnace quickly enters the furnace, impacting the dust on the furnace wall, causing the concentration of dust in the furnace to rise sharply. After the furnace door is opened, the dust will be discharged to the outside, directly polluting the surrounding working environment.

[0004] Currently, people install a dust collecting hood on the upper part of the vacuum induction furnace to collect dust. However, in order to avoid the influence of the dust collecting hood on smelting operation, the dust collecting hood needs to be installed at a higher position from the induction furnace, resulting in a large area of the dust collecting hood, large air suction volume, high power of the dust removal equipment, and high manufacturing cost. Therefore, the vacuum induction furnace generally does not have a special dust removal equipment to collect the dust released when the furnace door is opened, but uses the total dust removal equipment of the plant to purify the air in the entire plant, but the purification efficiency is very low. SUMMARY

[0005] In view of the above analysis, the utility model aims to provide a horizontal vacuum induction furnace with a dust collecting device to solve the problem of environmental pollution caused by dust in the furnace discharged through the furnace door after smelting in the prior art, high cost of existing dust removal equipment, and low purification efficiency.

[0006] The specific embodiment of the utility model provides a horizontal vacuum induction furnace, which comprises a furnace shell, a break valve and a dust collecting device, wherein the dust collecting device is installed on the furnace shell, the dust collecting device comprises a water cooler, a plug valve and a dust collector connected in sequence with the furnace shell, the water cooler is used for cooling the dust to be collected, the plug valve is used for connecting and disconnecting the dust collector and the furnace shell, and the dust collector is used for collecting dust.

[0007] Further, the dust collecting device is connected to the side wall or the lower wall of the furnace shell.

[0008] Further, the dust collecting device further comprises a heat dissipation grid, which is built in the water cooler, and is used for preventing the splashed metal liquid drops from adhering to the plug valve.

[0009] Further, the furnace shell wall is provided with a through hole, a steel pipe extending to the outside of the furnace shell is connected to the through hole, the heat dissipation grid is arranged in the steel pipe, and the water cooler is arranged outside the steel pipe.

[0010] Further, the steel pipe is connected to the plug valve through a flange, and the water cooler is in surface contact with the flange.

[0011] Further, the water cooler is connected to a water cooling system of the vacuum induction furnace.

[0012] Further, the plug valve is connected to the dust collector through a hose.

[0013] Further, the vacuum induction furnace further comprises a vacuum system, which is connected to the outside of the furnace shell through a pipeline, and is used for vacuumizing the furnace shell.

[0014] Further, the breaking valve is arranged on the furnace shell or the pipeline.

[0015] Further, the vacuum induction furnace further comprises a crucible and a feeding system, the crucible is arranged at the center of the furnace shell and is used for smelting metal, and the feeding system is connected to the furnace shell above the crucible.

[0016] Compared with the prior art, the vacuum induction furnace has at least one of the following beneficial effects:

[0017] 1. The dust collecting device of the vacuum induction furnace is directly installed on the furnace shell, the dust collector is communicated with the furnace shell after smelting is completed and breaking is started, and collection of dust in the furnace is realized.

[0018] 2. The dust collecting device is connected to the side wall or the lower wall of the furnace shell, and the dust removal efficiency of the dust collector can be further improved.

[0019] 3、The utility model discloses a heat dissipation grid is arranged in the middle of the furnace shell and the plug valve to prevent the metal liquid drop that splashes when smelting from sticking on the plug valve of lower part, cause the valve to be blocked, influence dust remover's dust removal efficiency, the heat dissipation grid plays the protection effect to plug valve, in addition, the heat dissipation grid is built -in in the water cooler, not only cool solidify the metal liquid drop that splashes when smelting, but also will have the cooling effect to the dust that will be collected after smelting ends, prevent the dust of temperature too high from damaging dust removal equipment.

[0020] 4、The utility model discloses a water cooler is connected with the water cooling system that vacuum induction furnace is with, is favorable to simplify equipment structure, reduce energy consumption.

[0021] The above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the utility model will be described in the following content, and some advantages will become apparent from the description or by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the content specially pointed out in the text and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings are only used for the purpose of illustrating specific embodiments and are not considered as limiting the utility model. Throughout the drawings, the same reference signs represent the same components.

[0023] Figure 1 The structure schematic diagram of horizontal vacuum induction furnace provided by the utility model is shown in the figure.

[0024] Reference signs:

[0025] 1-water cooler;2-plug valve;3-dust remover;4-vacuum system;5-emptying valve;6-furnace door gap;7-furnace shell;8-crucible;9-heat dissipation grid;10-flange;11-feeding system;12-pulley;13-slideway. DETAILED DESCRIPTION

[0026] The preferred embodiments of the utility model will be described in detail below in combination with the drawings, wherein the drawings constitute a part of the utility model and are used together with the embodiments of the utility model to explain the principles of the utility model, but are not used to limit the scope of the utility model.

[0027] Metal smelting is carried out in a vacuum induction furnace. After the furnace door is opened after the vacuum is broken, dust inside the furnace is emitted outside, directly polluting the surrounding working environment. To address this issue, dust collection hoods are installed on the top of the vacuum induction furnace to collect the dust. However, in practice, to avoid the dust collection hoods interfering with smelting operations, they need to be installed at a high position above the induction furnace. This results in a large dust collection hood area, a large air intake, high power consumption of the dust removal equipment, and high manufacturing costs. Therefore, vacuum induction furnaces generally do not have dedicated dust removal equipment to collect the dust released when the furnace door is opened. Instead, the entire factory's main dust removal equipment is used to purify the air in the factory, but the purification efficiency is very low.

[0028] Therefore, this utility model provides a horizontal vacuum induction furnace, such as Figure 1 As shown, the vacuum induction furnace includes a furnace shell 7, a venting valve 5, and a dust collection device. The dust collection device is installed on the furnace shell 7. The dust collector 3 is connected to the inner cavity of the furnace shell 7. A gate valve 2 and a dust collector 3 are installed in the channel connecting the dust collector 3 and the inner cavity of the furnace shell 7. The water cooler 1 is used to cool the dust to be collected. The gate valve 2 is used to connect and disconnect the dust collector 3 from the inner cavity of the furnace shell 7. The dust collector 3 is used for dust collection.

[0029] This utility model of a vacuum induction furnace directly installs a dust collection device on the furnace shell. After smelting is completed and the furnace begins to open, the dust collector is connected to the furnace shell to collect the dust inside the furnace. This utility model removes dust from inside the vacuum induction furnace at the source, avoiding environmental pollution caused by the discharge of dust from the furnace after smelting. It has high dust removal efficiency. Moreover, the dust collection device has a simple structure and low cost. It is directly installed on the furnace shell, does not require additional work space, and does not affect the smelting operation process.

[0030] Furthermore, the horizontal vacuum induction furnace has a side-opening door. In order to facilitate the circuit control of the venting valve, the venting valve 5 is installed on the fixed part of the vacuum induction furnace. If it is installed on the movable furnace door, it will be not conducive to connecting the circuit.

[0031] Furthermore, when the vacuum induction furnace is smelting metals, the venting valve 5 and the slide valve 2 in the dust collection device are in the closed state, so that the inside of the furnace shell 7 is kept in a vacuum state.

[0032] Further, when the vacuum induction furnace is completed smelting, the broken air valve 5 is opened first, the air outside the furnace is introduced into the furnace, the air pressure inside and outside the furnace is balanced, and the dust on the furnace wall can be also impacted, the collection efficiency of the subsequent dust collector on the dust in the furnace is improved; after the broken air for a period of time (2-10s), the pressure in the furnace approaches the external atmospheric pressure, the plug valve 2 is opened again, the dust collector 3 is communicated with the furnace shell 7, the dust in the furnace is collected through the dust collector 3, and the collection is continued for a period of time, when the dust in the furnace is collected, the treated product is taken out by opening the furnace door, and the environmental pollution caused by the exhaust of the dust in the furnace is avoided.

[0033] According to some preferred embodiments of the utility model, the utility model discloses the plug valve is electric plug valve, and it is convenient to open or close, and the automatic opening of plug valve and the automatic operation of dust collector are realized through time relay, that is, the signal of broken air valve opening triggers time relay to start timing, and time relay triggers the opening of electric plug valve and dust collector after time delay, thereby completing the linkage control of broken air valve, electric plug valve and dust collector, realizing the automatic collection of dust in the furnace after vacuum induction furnace smelting, and manual operation is not needed, the process is simplified, and it is simple and efficient.

[0034] Further, the dust collecting device is connected to the side wall or lower wall of the furnace shell, which is beneficial to further improve the dust removal efficiency of the dust collector, and when the dust collecting device is connected to the bottom position of the furnace shell, it is more beneficial to collect large particle dust settled on the furnace bottom.

[0035] Further, the dust collecting device further comprises a heat dissipation grid, and the heat dissipation grid is arranged in the water cooler, and is used for preventing the metal liquid droplets splashed during smelting from adhering to the plug valve.

[0036] It should be noted that the heat dissipation grid is arranged between the furnace shell and the plug valve, so that the metal liquid droplets splashed during smelting are prevented from adhering to the lower plug valve, the plug valve is prevented from being blocked, and the dust removal efficiency of the dust collector is affected, the heat dissipation grid plays a protection role on the plug valve, in addition, the heat dissipation grid is arranged in the water cooler, not only can cool and solidify the metal liquid droplets splashed during smelting, but also has a cooling effect on the dust to be collected after smelting, so that the dust with high temperature does not damage the dust removal equipment.

[0037] Further, a through hole is arranged on the furnace shell wall, a steel pipe extending to the outside of the furnace shell is connected to the through hole, the heat dissipation grid is arranged in the steel pipe, and the water cooler is arranged on the outer side of the steel pipe.

[0038] Further, the steel pipe is connected to the plug valve through a flange, and the water cooler is in surface contact with the flange.

[0039] It should be noted that the diameter size of the through hole arranged on the furnace shell corresponds to the diameter size of the steel pipe, and the specific size is determined by the flange size connecting the steel pipe and the plug valve.

[0040] It should be noted that, as described above, the utility model not only cools the heat dissipation grid by the water cooler to protect the plug valve and the dust collector, but also cools the flange by the water cooler to prevent the aging of the rubber ring that plays a sealing role when the flange is connected with the plug valve, and the heat inside the furnace shell is easily transferred to the flange through the steel pipe during the smelting process of the vacuum induction furnace, which easily causes the aging of the sealing rubber ring, the utility model makes the surface of the water cooler contact with the surface of the flange, and the flange is cooled by water cooling during the metal smelting process, so that the aging of the sealing rubber ring is prevented in the high-temperature environment, and the vacuum state during the smelting of the vacuum induction furnace is prevented from being destroyed.

[0041] Further, the water cooler is connected with the water cooling system of the vacuum induction furnace, so that the dust removal structure is simplified, and the energy consumption is reduced.

[0042] Further, in order to simplify the equipment structure and improve the cooling effect of the flange, the flange can be a water-cooled flange, the water-cooled flange is welded with the steel pipe, the heat dissipation grid is built-in the water-cooled part on the upper part of the water-cooled flange, and the lower part of the water-cooled flange is screw-connected with the plug valve.

[0043] Further, the plug valve is connected with the dust collector through a hose.

[0044] According to some preferred embodiments of the utility model, a through hole is arranged on the lower wall of the furnace shell, the steel pipe is welded with the through hole, a copper grid is placed in the steel pipe, and a water cooling pipe is arranged outside the steel pipe, wherein the water cooling pipe is connected with the water cooling system of the vacuum furnace; the water cooler is connected with the plug valve through a flange, the flange is connected with the plug valve by bolts; the plug valve and the dust collector are connected by a metal corrugated pipe; and the dust collector is fixed on the bottom of the lower wall of the furnace shell by screws.

[0045] Further, the vacuum induction furnace further comprises a vacuum system, the vacuum system is connected to the outside of the furnace shell through a pipeline, and is used for vacuumizing the furnace shell to realize the vacuum environment required during the smelting of the vacuum induction furnace.

[0046] Further, the utility model sets the breaking valve on the furnace shell of the vacuum induction furnace or on the pipeline connecting the vacuum system and the furnace shell.

[0047] According to some preferred embodiments of the utility model, the breaking valve is arranged on the pipeline connecting the vacuum system and the furnace shell.

[0048] Further, the vacuum induction furnace also comprises a crucible, the crucible is located in the center of the furnace shell, and is used for smelting metal.

[0049] Further, the vacuum induction furnace also comprises a feeding system, the feeding system is connected to the furnace shell directly above the crucible.

[0050] Further, in order to facilitate the opening and closing of the furnace door of the vacuum induction furnace, the utility model installs a pulley at the bottom of the side opening furnace door, and a slide rail is correspondingly arranged on the base supporting and fixing the furnace shell.

[0051] Example 1

[0052] A 50kg horizontal vacuum induction furnace, as shown in the figure, comprises a furnace shell 7, a vacuum breaking valve 5 and a dust collecting device, the vacuum breaking valve 5 is arranged on a pipeline connecting a vacuum system 4 and the furnace shell 7, and the dust collecting device is installed outside the lower wall of the furnace shell 7. Figure 1 A through hole with a diameter of 200mm is arranged at the bottom of the furnace shell 7, a steel pipe extending to the outside of the furnace shell 7 is welded on the through hole, the diameter of the steel pipe is the same as that of the through hole, a copper grid 9 is arranged in the steel pipe, a water cooling pipe 1 is arranged outside the steel pipe, the water cooling pipe 1 is connected with a water cooling system of the vacuum furnace, the water cooler 1 is connected with an electric plug-in valve 2 through a flange 10, the flange 10 is connected with the electric plug-in valve 2 through bolts, the electric plug-in valve 2 is connected with a dust collector 3 through a metal corrugated pipe with a diameter of 35mm.

[0053] The dust collector 3 is fixed on the lower wall outside the furnace shell 7 through screws.

[0054] In addition, the 50kg horizontal vacuum induction furnace also comprises a vacuum system 4, a crucible 8, a feeding system 11, a pulley 12 and a slide rail 13.

[0055] During the metal smelting process, the vacuum breaking valve 5 and the electric plug-in valve 2 are in a closed state, so that the inside of the furnace shell 7 is kept in a vacuum state.

[0056] After the metal smelting is completed, the vacuum breaking valve 5 is first opened, the air outside the furnace is introduced into the furnace, the air pressure inside and outside the furnace is balanced, and the dust on the furnace wall is impacted; after 2s, the electric plug-in valve 2 is opened, the dust collector 3 and the furnace shell 7 are connected, the dust in the furnace is automatically collected through the dust collector 3, lasts for 1min, the dust collector 3 is closed, the furnace door is opened through the pulley 12 and the slide rail 13, and the processed product is taken out.

[0057] Example 2

[0058] A kind of 500kg horizontal vacuum induction furnace, including furnace shell 7, broken air valve 5 and dust collection device, broken air valve 5 is set on the furnace body of furnace shell fixed part, dust collection device is installed on the outside of the side wall of furnace shell 7, wherein, in the side wall of furnace shell 7, through hole is equipped with 300mm in diameter, steel pipe extending to the outside of furnace shell 7 is welded on through hole, steel pipe diameter is same with through hole diameter;Copper grid 9 is placed in steel pipe, water cooling pipe 1 is equipped outside steel pipe, water cooling pipe 1 is connected with vacuum furnace self water cooling system;Water cooler 1 is connected with electric plug valve 2 by flange 10, flange 10 is connected with electric plug valve 2 by bolt;Electric plug valve 2 is connected with power;

[0059] With 1kW dust collector 3, dust collector 3 is fixed by screw on the outside of the side wall of furnace shell 7, with steel pipe same side;

[0060] In addition, 500kg horizontal vacuum induction furnace also includes vacuum system 4, crucible 8, feeding system 11, pulley 12 and slide rail 13;

[0061] In the process of metal smelting, broken air valve 5 and electric plug valve 2 are in closed state, so that the inside of furnace shell 7 keeps vacuum state;

[0062] After metal smelting ends, first broken air valve 5 is opened, air outside furnace is introduced into furnace, and the air pressure inside and outside furnace is balanced, and dust on furnace wall is impacted;After broken air 5s, electric plug valve 2 is opened, dust collector 3 is connected with furnace shell 7, and dust in furnace is automatically collected by dust collector 3, lasts 5min, dust collector 3 is closed, furnace door is slid open by pulley 12 and slide rail 13, and the product after processing is taken out.

[0063] The above described, only for the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled in the art of the technical person in the technical range disclosed by the present application, easily thought of change or replacement, should be covered in the protection scope of the present application.

Claims

1. A horizontal vacuum induction furnace with a dust collection device, characterized in that, The vacuum induction furnace includes a furnace shell, a venting valve, and a dust collection device, wherein the dust collection device is installed on the furnace shell; The dust collection device includes a water cooler, a gate valve, and a dust collector, wherein the dust collector is connected to the inner cavity of the furnace shell. A gate valve and a water cooler are installed on the channel connecting the dust collector and the inner cavity of the furnace shell. The water cooler is used to cool the dust to be collected, the gate valve is used to connect and disconnect the dust collector from the inner cavity of the furnace shell, and the dust collector is used to collect the dust.

2. The vacuum induction furnace according to claim 1, characterized in that, The dust collection device is connected to the side wall or lower wall of the furnace shell.

3. The vacuum induction furnace according to claim 1, characterized in that, The dust collection device also includes a heat dissipation grille, which is built into the water cooler to prevent splashed metal droplets from adhering to the slide valve during smelting.

4. The vacuum induction furnace according to claim 3, characterized in that, The furnace shell wall is provided with a through hole, and a steel pipe extending to the outside of the furnace shell is connected to the through hole. The heat dissipation grid is installed inside the steel pipe, and the water cooler is installed outside the steel pipe.

5. The vacuum induction furnace according to claim 4, characterized in that, The steel pipe is connected to the slide gate valve via a flange, and the water cooler is in contact with the surface of the flange.

6. The vacuum induction furnace according to claim 1, characterized in that, The water cooler is connected to the water cooling system that comes with the vacuum induction furnace.

7. The vacuum induction furnace according to claim 1, characterized in that, The gate valve is connected to the dust collector via a hose.

8. The vacuum induction furnace according to claim 1, characterized in that, The vacuum induction furnace also includes a vacuum system, which is connected to the outside of the furnace shell via a pipe and is used to evacuate the furnace shell.

9. The vacuum induction furnace according to claim 1, characterized in that, The vacuum induction furnace also includes a crucible located in the center of the furnace shell for smelting metals.

10. The vacuum induction furnace according to claim 9, characterized in that, The vacuum induction furnace also includes a feeding system connected to the furnace shell directly above the crucible.

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