CN218710641U - Vacuum degassing furnace for steel casting production - Google Patents

Abstract

The utility model discloses a vacuum degassing furnace of steel casting production usefulness, including vacuum degassing furnace body, real empty room and fixed plate, real empty room's bottom is run through and is installed the suction pipe, real empty room's bottom is run through and is installed the discharge pipe, real empty room's outside through connection installs the vacuum gas connecting pipe. The utility model discloses an install the suction tube, can expand rapidly under the effect of the high temperature of argon gas and molten steel and real empty room low pressure, carry out through connection with real empty room through vacuum gas connecting pipe, can make real empty room's inside maintain and be in the vacuum state, the gaseous mixture of real empty room's molten steel and gas releases under vacuum effect, the molten steel that makes release gas through the discharge pipe flows back to the inside of vacuum degassing furnace body, thereby be convenient for the effectual gas that extracts the vacuum emission molten steel repeatedly to the molten steel of staff of steel casting, effectively improve the impact toughness of steel casting, the degasification effect of individual molten steel has been accelerated, and the work efficiency is improved.

Description

Vacuum degassing furnace for steel casting production

Technical Field

The utility model relates to a vacuum degassing furnace technical field of steel casting production usefulness specifically is a vacuum degassing furnace of steel casting production usefulness.

Background

The steel casting is formed by watering molten steel, the refining function is continuously expanded after the vacuum degassing treatment is developed for nearly 40 years, and a simple degassing device is changed into a multifunctional treatment device. The characteristic of its rapid processing makes it able to cooperate with the fast pace of the converter, the vacuum circulation processing is especially suitable for the rapid processing of large quantities of molten steel, and can be satisfactorily cooperated with large capacity electric arc furnace or converter, because of the advantage of the vacuum circulation processing method, it becomes one of the fastest external refining equipments at present, the vacuum degassing furnace needs to be used to vacuum degas the molten steel in the steel casting pouring, the traditional vacuum degassing furnace is used in the molten steel, because the gas in the steel is mainly hydrogen and nitrogen, which are dissolved into the molten steel in the steel making process, the harm to the steel performance is great, the defects of bubbles, white spots, striae, steel ingot rising and the like are caused when the hydrogen is separated out in the molten steel solidification process, however, the hydrogen which is not separated out can reduce the strength limit, the section shrinkage, the elongation and the impact toughness of the steel, reduce the impact toughness of the steel and cause the cold brittleness of the steel, therefore, the utility model provides a vacuum degassing furnace for producing steel castings.

The existing vacuum degassing furnace has the following defects:

patent document CN206373359U discloses a vacuum degassing furnace, which is a protection item comprising a furnace body, a feeding and discharging device, a vacuum-pumping system, a cooling water supply system and a heating element power supply system. The furnace body comprises an upper furnace cover, a furnace cylinder body and a lower furnace cover, wherein a cold water cavity formed by double-layer water cooling structures of the upper furnace cover, the furnace cylinder body and the lower furnace cover is connected with a cooling water supply system, the upper furnace cover is fixedly arranged at the top of the furnace cylinder body, and the furnace cylinder body is supported by a furnace support. The inner walls of the furnace cylinder body, the upper furnace cover and the lower furnace cover are all fixedly provided with heat shields, the inner wall of the heat shield in the furnace cylinder body is fixedly provided with a heating body, an inner cavity formed by the heating body is connected with a vacuum-pumping system, and the heating body is connected with a heating body power supply system. The feeding and discharging device comprises a bracket, a lead screw transmission mechanism and a feeding trolley which are arranged in a frame formed by the furnace support, the lower furnace cover is supported by the bracket, and the bracket drives the lower furnace cover to move up and down under the drive of the lead screw transmission mechanism. The utility model discloses the load capacity is big, degree of automation is high, easy operation is convenient, it is perfect to pollute the protection, this published patent document, this vacuum degassing furnace is though the load capacity is big, degree of automation is high, easy operation is convenient, it is perfect to pollute the protection, but the effect is comparatively not good in exhausting to the inside hydrogen of molten steel and nitrogen, because gas is hydrogen and nitrogen in the steel, they are that the molten steel is dissolved into in the steelmaking process, it is very big to steel performance harm, will cause the bubble when hydrogen is appeared in the molten steel solidification process, the white point, defect such as lines and steel ingot rising, nevertheless not the hydrogen that is appeared can reduce the intensity limit of steel, the reduction of area, elongation and impact toughness, reduce the impact toughness of steel and arouse the cold brittleness of steel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vacuum degassing furnace of steel casting production usefulness, in order to solve and to propose among the above-mentioned background art because gas is hydrogen and nitrogen mainly in the steel, they are the molten steel of dissolving into in the steelmaking process, it is very big to steel performance harm, will cause the bubble when hydrogen is appeared in the molten steel solidification process, the white point, send line and steel ingot defect such as rise, nevertheless not can reduce the intensity limit of steel by the hydrogen that appears, reduction of area factor, elongation and impact toughness, reduce the impact toughness of steel and arouse the problem of the cold brittleness of steel.

In order to achieve the above object, the utility model provides a following technical scheme: a vacuum degassing furnace for steel casting production comprises a vacuum degassing furnace body, a vacuum chamber and a fixing plate, wherein a refractory brick is installed on the inner wall of the vacuum degassing furnace body, an argon inlet pipe penetrates through the inside of the vacuum degassing furnace body, the argon inlet pipe penetrates through the inside of the refractory brick, and the vacuum chamber is movably installed at the top of the vacuum degassing furnace body;

the vacuum chamber is characterized in that a suction pipe is installed at the bottom of the vacuum chamber in a penetrating manner, a discharge pipe is installed at the bottom of the vacuum chamber in a penetrating manner and is positioned on one side of the suction pipe, and a vacuum gas connecting pipe is installed at the outer side of the vacuum chamber in a penetrating manner;

and a plurality of groups of fixing plates are symmetrically arranged on the outer side of the vacuum chamber, and the fixing plates are positioned above the second sealing plate.

Preferably, a first sealing plate is installed on the outer side of the top end of the vacuum degassing furnace body.

Preferably, a second sealing plate is installed outside the vacuum chamber.

Preferably, the fixing plate is internally provided with a connecting column in a penetrating way.

Preferably, the top of vacuum chamber is run through and is installed the blast pipe, and the top of blast pipe is run through and is installed the work box, and the top of work box is run through and is installed and has seted up the venthole.

Preferably, the inner wall symmetry of work box is installed No. one and is supported the groove, and the filter screen is installed to the inside gomphosis in No. one support the groove, and the filter screen activity runs through the front of work box.

Preferably, the inner wall of the working box is symmetrically provided with a second supporting groove, the second supporting groove is positioned above the first supporting groove, the inside of the second supporting groove is embedded with an activated carbon layer, and the activated carbon layer movably penetrates through one side of the working box.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses an install the suction tube, it is sealed to be connected through a closing plate and No. two closing plates, make the inside of vacuum degassing furnace body be in encapsulated situation, can pour into proper amount argon into to the inside of vacuum degassing furnace body through the argon gas intake pipe, argon gas is through pouring into the inside of vacuum degassing furnace body, can expand rapidly under the effect of the high temperature of argon gas and molten steel and real empty room low pressure, make the inside of vacuum degassing furnace body produce high-pressure reaction, through the effect of pressure, can make the molten steel get into the inside of real empty room, through vacuum gas connecting pipe and real empty room carry out through connection, can make the inside of real empty room maintain and be in vacuum state, the molten steel that gets into real empty room releases gas with the mixture of gas under the effect of vacuum, make the molten steel of releasing gas flow back to the inside of vacuum degassing furnace body through the discharge pipe, thereby the staff's of the steel casting of being convenient for effectually extracts the gas in the vacuum to the molten steel repeatedly, effectively improve the impact toughness of steel casting, the degasification effect of individual molten steel has been accelerated, and work efficiency is improved.

2. The utility model discloses an install the activated carbon layer, make the gas of molten steel release get into the inside of work box through the blast pipe, support the groove through a and support the groove and be the concave groove with No. two, support the groove and provide gomphosis slip support for the filter screen, the front of work box is run through the filter screen activity, pull through steel casting staff's power, can make the filter screen take out in the inside slip of supporting the groove No. one, can tentatively strain the molten steel through the filter screen, no. two support the groove and support the slip that the activated carbon layer of inside activity gomphosis installation provided, one side of work box is run through the activated carbon layer activity, the twitch through steel casting staff's power can make the activated carbon layer take out in the inside of work box, be convenient for clean the activated carbon layer, can adsorb floating small granule in the air through the activated carbon layer, strain the gas of release, the junction through filter screen and activated carbon layer and work box has good leakproofness, thereby the staff of steel casting of being convenient for strain the gas of release absorbs the peculiar smell of release, be convenient for dismantle filter screen and activated carbon layer, avoid releasing air pollution on every side.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a front sectional view of the vacuum degassing furnace body of the present invention;

FIG. 3 is a front cross-sectional view of the vacuum chamber of the present invention;

FIG. 4 is a front sectional view of the working chamber of the present invention;

FIG. 5 is a top sectional view of the vacuum degassing furnace body of the present invention.

In the figure: 1. a vacuum degassing furnace body; 101. a refractory brick; 102. an argon inlet pipe; 103. a first sealing plate; 2. a vacuum chamber; 201. a second sealing plate; 202. a suction tube; 203. a discharge pipe; 204. a vacuum gas connecting pipe; 3. a fixing plate; 301. connecting columns; 4. an exhaust pipe; 401. a work box; 402. an air outlet; 5. a first supporting groove; 501. filtering with a screen; 6. a second support groove; 601. and an activated carbon layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 2 and 5, the present invention provides an embodiment: a vacuum degassing furnace for producing steel castings;

including vacuum degassing stove body 1, its characterized in that: the inner wall of a vacuum degassing furnace body 1 is provided with a refractory brick 101, an argon inlet pipe 102 is installed in the vacuum degassing furnace body 1 in a penetrating mode, the argon inlet pipe 102 penetrates through the interior of the refractory brick 101, a first sealing plate 103 is installed on the outer side of the top end of the vacuum degassing furnace body 1, a vacuum chamber 2 is movably installed at the top of the vacuum degassing furnace body 1, the vacuum degassing furnace body 1 is a vacuum degassing furnace for producing steel castings, a certain space is formed in the vacuum degassing furnace body 1 and used for storing molten steel and carrying out vacuum degassing on the molten steel, the refractory brick 101 is installed on the inner wall of the vacuum degassing furnace body 1, the refractory brick 101 is an inorganic nonmetal product with the refractoriness of not lower than 1750 ℃ and used for protecting a shell of the vacuum degassing furnace body 1 from being melted by high temperature, a proper amount of argon can be injected into the interior of the vacuum degassing furnace body 1 through the argon inlet pipe 102, the argon can be rapidly expanded through the high temperature of the argon and the low pressure of the vacuum chamber 2, the interior of the vacuum degassing furnace body 1 can generate high pressure reaction, and a joint position is provided for a second sealing plate 201 through the first sealing plate 103.

Referring to fig. 1, 2 and 3, the present invention provides an embodiment: a vacuum degassing furnace for producing steel castings;

the vacuum degassing furnace comprises a vacuum chamber 2, wherein a suction pipe 202 is installed at the bottom of the vacuum chamber 2 in a penetrating manner, a discharge pipe 203 is installed at the bottom of the vacuum chamber 2 in a penetrating manner, the discharge pipe 203 is positioned on one side of the suction pipe 202, a vacuum gas connecting pipe 204 is installed at the outer side of the vacuum chamber 2 in a penetrating manner, a second sealing plate 201 is installed at the outer side of the vacuum chamber 2 in a penetrating manner, a certain space is formed in the vacuum chamber 2 and used for storing incoming molten steel, the vacuum chamber 2 is hermetically connected with the first sealing plate 103 through the second sealing plate 201, the vacuum chamber 2 is hermetically installed at the top end of the vacuum degassing furnace body 1, the molten steel extending into the molten steel in the vacuum degassing furnace body 1 through the suction pipe 202, the molten steel can enter the vacuum chamber 2 through the action of pressure, the vacuum gas connecting pipe 204 is in penetrating manner with the vacuum chamber 2, the mixture of the molten steel and gas entering the vacuum chamber 2 releases gas under the action of vacuum, the molten steel and the gas flows back into the vacuum degassing furnace body 1 through the discharge pipe 203, and therefore workers of steel can effectively and repeatedly extract the molten steel in vacuum degassing process, gas in vacuum, the molten steel can be discharged, the molten steel, the impact toughness of a steel casting, and the molten steel casting is effectively improved, and the working efficiency is improved.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides an embodiment: a vacuum degassing furnace for producing steel castings;

comprises a fixed plate 3, an exhaust pipe 4, a first support groove 5 and a second support groove 6, a plurality of groups of fixed plates 3 are symmetrically installed on the outer side of a vacuum chamber 2, the fixed plates 3 are positioned above a second sealing plate 201, a connecting column 301 is installed inside the fixed plates 3 in a penetrating way, the exhaust pipe 4 is installed on the top of the vacuum chamber 2 in a penetrating way, a work box 401 is installed on the top of the exhaust pipe 4 in a penetrating way, an air outlet 402 is formed in the top of the work box 401 in a penetrating way, a first support groove 5 is symmetrically installed on the inner wall of the work box 401, a filter screen 501 is installed in the first support groove 5 in an embedded way, the filter screen 501 movably penetrates through the front of the work box 401, a second support groove 6 is symmetrically installed on the inner wall of the work box 401, the second support groove 6 is positioned above the first support groove 5, an activated carbon layer 601 is installed in the second support groove 6 in an embedded way, and the activated carbon layer 601 movably penetrates through one side of the work box 401, the fixing plate 3 is fixedly installed on the outer side of the vacuum chamber 2 and is connected with the connecting chain through the connecting column 301, so that the vacuum chamber 2 is conveniently removed, the exhaust pipe 4 penetrates through the top of the vacuum chamber 2, the exhaust pipe 4 is used for conveying gas released by molten steel, the working box 401 provides protection for the filter screen 501 and the activated carbon layer 601 in the working box, the filtered gas is discharged through the air outlet 402, the first supporting groove 5 and the second supporting groove 6 are concave grooves, the first supporting groove 5 provides embedded sliding support for the filter screen 501, the filter screen 501 movably penetrates through the front of the working box 401 through the filter screen 501, the filter screen 501 can be pulled out in the first supporting groove 5 in a sliding manner through the drawing force of a steel casting worker, the molten steel can be primarily filtered through the filter screen 501, and the second supporting groove 6 provides sliding support for the activated carbon layer 601 movably embedded in the inner part, run through one side of work box 401 through the activity of activated carbon layer 601, twitch through steel casting staff's power can make activated carbon layer 601 take out in work box 401's inside, be convenient for clean activated carbon layer 601, can adsorb the tiny particle that floats in the air through activated carbon layer 601, strain the gas of release, the junction through filter screen 501 and activated carbon layer 601 and work box 401 has good leakproofness, thereby be convenient for the staff of steel casting strains the absorption peculiar smell of the gas of release, be convenient for dismantle cleanness to filter screen 501 and activated carbon layer 601, avoid releasing the air around the gas pollution.

The working principle is as follows: the first sealing plate 103 and the second sealing plate 201 are connected and sealed to enable the interior of the vacuum degassing furnace body 1 to be in a sealed state, a proper amount of argon can be injected into the interior of the vacuum degassing furnace body 1 through the argon inlet pipe 102, the argon can be injected into the interior of the vacuum degassing furnace body 1 and can rapidly expand under the action of high temperature of the argon and molten steel and low pressure of the vacuum chamber 2, so that the interior of the vacuum degassing furnace body 1 generates high-pressure reaction, the argon extends into the molten steel in the interior of the vacuum degassing furnace body 1 through the suction pipe 202, the molten steel can enter the interior of the vacuum chamber 2 through the action of pressure, the argon is in through connection with the vacuum chamber 2 through the vacuum gas connecting pipe 204, the interior of the vacuum chamber 2 can be maintained in a vacuum state, and a mixture of the molten steel and gas entering the vacuum chamber 2 releases gas under the action of vacuum, the molten steel releasing gas flows back to the inside of the vacuum degassing furnace body 1 through the discharge pipe 203, so that the workers of the steel casting can effectively and repeatedly extract the gas in the vacuum discharged molten steel, the impact toughness of the steel casting is effectively improved, the degassing effect of the molten steel is accelerated, the working efficiency is improved, the gas released by the molten steel and the molten steel enters the inside of the working box 401 through the discharge pipe 4, the first supporting groove 5 and the second supporting groove 6 are concave grooves, the first supporting groove 5 provides embedded sliding support for the filter screen 501, the filter screen 501 movably penetrates through the front surface of the working box 401 through the filter screen 501, the filter screen 501 can be pulled out in the first supporting groove 5 in a sliding manner through the pull-out force of the workers of the steel casting, the molten steel can be preliminarily filtered through the filter screen 501, and the second supporting groove 6 provides sliding support for the activated carbon layer 601 movably embedded in the inside, run through one side of work box 401 through the activity of activated carbon layer 601, twitch through steel casting staff's power can make activated carbon layer 601 take out in work box 401's inside, be convenient for clean activated carbon layer 601, can adsorb the tiny particle that floats in the air through activated carbon layer 601, strain the gas of release, the junction through filter screen 501 and activated carbon layer 601 and work box 401 has good leakproofness, thereby be convenient for the staff of steel casting strains the absorption peculiar smell of the gas of release, be convenient for dismantle cleanness to filter screen 501 and activated carbon layer 601, avoid releasing the air around the gas pollution.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides a vacuum degassing furnace of steel casting production usefulness, includes vacuum degassing furnace body (1), real empty room (2) and fixed plate (3), its characterized in that: the inner wall of the vacuum degassing furnace body (1) is provided with refractory bricks (101), an argon inlet pipe (102) penetrates through the inside of the vacuum degassing furnace body (1), the argon inlet pipe (102) penetrates through the inside of the refractory bricks (101), and the top of the vacuum degassing furnace body (1) is movably provided with a vacuum chamber (2);

a suction pipe (202) penetrates through the bottom of the vacuum chamber (2), a discharge pipe (203) penetrates through the bottom of the vacuum chamber (2), the discharge pipe (203) is positioned on one side of the suction pipe (202), and a vacuum gas connecting pipe (204) penetrates through the outer side of the vacuum chamber (2);

the outside symmetry of vacuum chamber (2) is installed multiunit fixed plate (3), and fixed plate (3) are located the top of No. two closing plates (201).

2. A vacuum degassing furnace for the production of steel castings according to claim 1, characterized in that: a first sealing plate (103) is arranged on the outer side of the top end of the vacuum degassing furnace body (1).

3. A vacuum degassing furnace for the production of steel castings according to claim 1, characterized in that: and a second sealing plate (201) is arranged on the outer side of the vacuum chamber (2).

4. A vacuum degassing furnace for the production of steel castings according to claim 1, characterized in that: the inside of fixed plate (3) is run through and is installed spliced pole (301).

5. A vacuum degassing furnace for the production of steel castings according to claim 3, characterized in that: the top of vacuum chamber (2) is run through and is installed blast pipe (4), and run through at the top of blast pipe (4) and install work box (401), and run through at the top of work box (401) and install and seted up venthole (402).

6. A vacuum degassing furnace for the production of steel castings according to claim 5, characterized in that: a supporting groove (5) is symmetrically installed on the inner wall of the working box (401), a filter screen (501) is installed in the supporting groove (5) in an embedded mode, and the filter screen (501) penetrates through the front face of the working box (401) movably.

7. A vacuum degassing furnace for the production of steel castings according to claim 5, characterized in that: no. two support grooves (6) are symmetrically installed on the inner wall of the working box (401), the No. two support grooves (6) are located above the first support groove (5), an activated carbon layer (601) is installed in the No. two support grooves (6) in an embedded mode, and the activated carbon layer (601) movably penetrates through one side of the working box (401).

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