CN210441673U

CN210441673U - Internal circulation filtering device for vacuum or gas protection smelting system

Info

Publication number: CN210441673U
Application number: CN201921298951.6U
Authority: CN
Inventors: 不公告发明人
Original assignee: Ningbo Zhongyuan New Material Technology Co ltd
Current assignee: Ningbo Zhongyuan New Material Technology Co ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-05-01
Anticipated expiration: 2029-08-12

Abstract

The utility model provides an internal circulation filtering device for a vacuum or gas protection smelting system, which comprises a dust removal pipeline, wherein a first vacuum valve, a water-cooling grid, a vacuum fan, a dust-free high-temperature-resistant filter element and a second vacuum valve are arranged in the dust removal pipeline in sequence; one end of the dust removal pipeline, which is close to the first vacuum valve, is connected to the top end of the vacuum smelting chamber, and the other end of the dust removal pipeline is connected to the lateral lower part of the vacuum smelting chamber. This filter equipment can assist the vacuum system and smelt the process, under the prerequisite of not destroying the vacuum cavity, can effectually guarantee the continuity of process of smelting, need not the gas exhaust system outside, just can effectually filter "smoke and dust", guarantee going on smoothly of smelting, also effectively protect the inside device of vacuum or gas protection system of smelting simultaneously.

Description

Internal circulation filtering device for vacuum or gas protection smelting system

Technical Field

The utility model relates to a vacuum melting field, more specifically relates to an inner loop filter equipment that is used for vacuum or gas protection system of smelting.

Background

At present, most of high-quality metal smelting processes are carried out in a vacuum environment or a gas-protected environment, because materials are smelted in a vacuum system, the smelting process is in a low-pressure environment or an inert gas-protected environment, and the purity of the materials can be effectively guaranteed, for example, smelting is carried out in smelting equipment such as a vacuum or gas-protected smelting furnace, a vacuum arc furnace and the like.

However, these melting apparatuses are operated at high melting temperatures, and often suffer from the problem of "fuming" of the material melted inside the apparatus, which is caused by the components of the melted material containing volatile elements, such as Mn, Zn, Al, Mg, etc., which are volatilized from the high-temperature melt in large quantities during heating, and which rapidly sublimate to form very fine solid particles when encountering the atmosphere in the apparatus, and which forms a phenomenon similar to "fuming" when forming a large quantity of solid particles in the melting atmosphere of the apparatus. A large amount of solid particles can be stained with all equipment surfaces in the smelting cavity and the inner wall of the smelting cavity, so that the equipment is polluted, a vacuum valve and a pipeline system are easily damaged, the equipment is difficult to clean, a detection device can be damaged at the same time, an observation window and a lens are polluted, the serious pollution can also cause the safety problem that the smelting cannot be carried out or even the experiment or the production is brought, the monitoring system in the equipment cannot normally work, and the smelting process is difficult. In addition, in the working process of the equipment, workers can hardly judge the working state inside the equipment visually, so that the danger and even the interruption of the smelting process are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough, provide an inner loop filter equipment that is used for vacuum or gas protection system of smelting. This filter equipment can assist the vacuum system and smelt the process, under the prerequisite of not destroying vacuum cavity atmosphere environment, can effectually guarantee the continuity of smelting the process, need not to be outside the gas exhaust system, just can effectually filter "smoke and dust", guarantee going on smoothly of smelting, also effectively protect the inside device of vacuum or gas protection smelting system simultaneously. In addition, the filtering device is connected to a vacuum or gas protection smelting system, so that the reaction of materials and active ingredients in the air such as oxygen, water vapor and the like after a vacuum cavity or the gas protection smelting system is opened is avoided, secondary vacuumizing is avoided to pollute vacuum or gas protection smelting system equipment, and the working time is effectively reduced. Meanwhile, the damage of high-temperature gas to a vacuum system during vacuumizing and the acceleration of the volatilization speed of volatile components by negative pressure atmosphere during vacuumizing are avoided under the protection of the high-temperature gas.

The smoke dust in the smelting system is removed under the closed condition, and meanwhile, the smelting process does not need to be interrupted, and the vacuum or gas protection environment of smelting does not need to be damaged.

The technical scheme of the utility model is that:

the utility model provides an internal circulation filtering device for a vacuum or gas protection smelting system, which comprises a dust removal pipeline, wherein a first vacuum valve, a water-cooling grid, a vacuum fan, a dust-free high-temperature resistant filter element and a second vacuum valve are arranged in the dust removal pipeline in sequence; one end of the dust removal pipeline, which is close to the first vacuum valve, is connected to the top end of the vacuum smelting chamber, and the other end of the dust removal pipeline is connected to the lateral lower part of the vacuum smelting chamber.

Furthermore, the water-cooling grating sequentially comprises an upper cover plate, a middle gap plate and a lower cover plate from top to bottom, and the upper cover plate, the middle gap plate and the lower cover plate are flexibly connected into an integrated structure through side walls and can be detached and replaced; the water cooling pipe is arranged between the upper cover plate and the middle gap plate, the side wall between the middle gap plate and the lower cover plate is provided with an air inlet, the other side wall opposite to the side wall where the air inlet is arranged is provided with an air outlet, and the air outlet is adjacent to the upper cover plate. The smoke dust discharged from the vacuum melting chamber enters the water-cooling grid from bottom to top, so that a large amount of metal steam in the smoke dust is solidified.

Further, the water-cooling pipe between the upper cover plate and the middle gap plate is arranged in a serpentine line mode. The arrangement of the serpentine line mode can ensure that the largest area of the water cooling pipe is arranged in the space between the upper cover plate and the middle gap plate, so that the cooling of smoke and dust gas and the adsorption of the solidified partial metal steam are better.

Furthermore, pipe orifices at two ends of the water-cooling pipe extend out of the upper cover plate, and a pipe orifice at one end close to the air outlet is a water inlet and is connected to a cold water inlet device; the other end pipe orifice is a water outlet and is connected to a water outlet device. The water temperature in the water-cooled tube at one side of the gas outlet is ensured to be the lowest, and the content of metal steam in the smoke gas is further reduced.

Furthermore, the number of the middle gap plates is two, and the two middle gap plates are respectively arranged on two sides of the side wall. The influence that the metal particle that can avoid dropping effectively caused the air inlet, the setting up of intermediate gap board can effectually reduce the metal particle that solidifies and get off and fall down on the apron simultaneously, and the at utmost reduces the influence of admitting air to the air inlet.

Furthermore, water-cooling grid, vacuum blower and dustless high temperature resistant filter core are all can dismantle the setting. The structure that can independently dismantle the clearance provides convenience for the cleaning work.

Furthermore, a smelting crucible and a casting mold are arranged in the vacuum smelting chamber, and the smelting crucible is higher than the casting mold; the vacuum melting chamber is connected with a vacuum pump.

Furthermore, one end of the dust removal pipeline, which is close to the first vacuum valve, is connected to the top end of the vacuum melting chamber above the melting crucible, so that the melted smoke and dust gas is extracted to the maximum extent, and the pollution to the vacuum melting chamber is reduced to the maximum extent; the position of a pipe orifice at the lateral lower part of the dust removal pipeline connected to the vacuum smelting chamber is lower than the top of the casting mold.

Further, the total length of the dust removal pipeline is 1-4 meters; preferably, the total length of the dust removal pipeline is 2 meters.

Further, the length of the middle gap plate is 1/4-1/3 of the length of the lower cover plate.

The utility model has the advantages that:

the utility model discloses a filter equipment can assist vacuum system and smelt the process, under the prerequisite of not destroying vacuum cavity, can effectual assurance smelt the continuity of process, need not the gas exhaust system outside, just can be with "smoke and dust" effectual filtration, guarantee going on smoothly of smelting, also effectively protect vacuum or the inside device of gas protection system simultaneously. In addition, the filtering device is connected to a vacuum or gas protection smelting system, so that the reaction of materials and active ingredients in the air such as oxygen, water vapor and the like after the vacuum or gas protection smelting system is opened is avoided, secondary vacuumizing is avoided to pollute vacuum or gas protection smelting system equipment, and the working time is effectively reduced. Meanwhile, the damage of high-temperature gas to a vacuum system during vacuumizing under the protection of the high-temperature gas and the accelerated volatilization of volatile elements caused by the negative pressure condition in a vacuum cavity during vacuumizing are avoided.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.

Fig. 1 is a schematic view of the connection structure of the internal circulation filtering device and the vacuum or gas protection smelting system equipment of the utility model.

Fig. 2 is a schematic structural view of the water-cooling grille of the present invention.

In the figure, 1, a dust removal pipeline, 2, a first vacuum valve, 3, a water-cooling grid, 3-1, a gas inlet, 3-2, a gas outlet, 3-3, a water-cooling pipe, 3-4, an upper cover plate, 3-5, a lower cover plate, 3-6, a middle gap plate, 3-7, a side wall, 4, a vacuum fan, 5, a dust-free high-temperature-resistant filter element, 6, a second vacuum valve, 7, a vacuum smelting chamber, 8, a vacuum pump, 9, a smelting crucible, 10 and a casting mold.

Detailed Description

Example 1

Referring to fig. 1, an internal circulation filter device for a vacuum or gas protection smelting system comprises a dust removal pipeline 1, wherein a first vacuum valve 2, a water-cooling grid 3, a vacuum fan 4, a dust-free high-temperature-resistant filter element 5 and a second vacuum valve 6 are sequentially arranged in the dust removal pipeline 1; one end of the dust removal pipeline 1 close to the first vacuum valve 2 is connected to the top end of the vacuum smelting chamber 7, and the other end of the dust removal pipeline is connected to the lateral lower part of the vacuum smelting chamber 7. The water-cooling grid 3 comprises an upper cover plate 3-4, a middle gap plate 3-6 and a lower cover plate 3-5 from top to bottom in sequence, and the upper cover plate 3-4, the middle gap plate 3-6 and the lower cover plate 3-5 are flexibly connected into an integral structure through side walls 3-7; a water cooling pipe 3-3 is arranged between the upper cover plate 3-4 and the middle gap plate 3-6, an air inlet 3-1 is arranged on a side wall 3-7 between the middle gap plate 3-6 and the lower cover plate 3-5, an air outlet 3-2 is arranged on the other side wall 3-7 opposite to the side wall where the air inlet 3-1 is arranged, and the air outlet 3-2 is adjacent to the upper cover plate 3-4. The water-cooling pipes 3-3 between the upper cover plate 3-4 and the middle gap plate 3-6 are arranged in a serpentine line mode. Pipe orifices at two ends of the water cooling pipe 3-3 extend out of the upper cover plate 3-4, and a pipe orifice at one end close to the air outlet 3-2 is a water inlet and is connected to a cold water inlet device; the other end pipe orifice is a water outlet and is connected to a water outlet device.

The two middle gap plates 3-6 are respectively arranged at the two sides of the side walls 3-7. The length of the middle gap plate 3-6 is 1/4-1/3 of the length of the lower cover plate 3-5. The water-cooling grid 3, the vacuum fan 4 and the dust-free high-temperature-resistant filter element 5 are all detachably arranged.

A smelting crucible 9 and a casting mold 10 are arranged in the vacuum smelting chamber 7, and the smelting crucible 9 is higher than the casting mold 10; the vacuum melting chamber 7 is connected with a vacuum pump 8. One end of the dust removal pipeline 1 close to the first vacuum valve 2 is connected to the top end of a vacuum melting chamber 7 above a melting crucible 9; the position of a pipe orifice of the dust removal pipeline 1 connected to the side lower part of the vacuum smelting chamber 7 is lower than the top of the casting mould 10.

The total length of the dust removal pipeline 1 is 1-4 meters, and preferably 2 meters.

Example 2

As shown in fig. 1, the internal circulation filter device of example 1 is connected to a vacuum or gas protection smelting system device, and the communication and isolation of the internal circulation filter device and the vacuum or gas protection smelting system device are controlled by a first vacuum valve 2 and a second vacuum valve 6. If no volatile substances are generated in the smelting material, the first vacuum valve 2 and the second vacuum valve 6 do not need to be opened, and the dust removal system does not need to enter a working state. If volatile substances are generated in the smelting material and smoke gas is generated in the vacuum or gas protection smelting system, the first vacuum valve 2 and the second vacuum valve 6 need to be opened.

Starting a vacuum fan 4, pumping out gas mixed with smoke dust from a vacuum melting chamber into a dust removal pipeline 1, firstly passing through a first vacuum valve 2, then entering a water-cooling grid 3 from an air inlet 3-1 of the water-cooling grid 3, cooling the gas mixed with the smoke dust by the water-cooling grid 3, and simultaneously cooling a large amount of metal steam mixed with the smoke dust, solidifying part of the metal steam and adsorbing the metal steam on the water-cooling grid 3 or dropping on a middle gap plate 3-6, so that the water-cooling grid 3 plays a role in first-step dust removal and cooling, and besides, reducing the temperature can effectively protect fan blades and a next-stage dust-free high-temperature-resistant filter element; the gas after the first step of cooling and purification through water-cooling grid 3 comes out from gas outlet 3-2, further through 4 blades of vacuum fan, the blade rotates the drive power that the in-process can bring the air current motion, and gaseous behind the blade, rethread dustless high temperature resistant filter core 5 filters once more, and most solid particle can be filtered down in the gaseous back of filtering, and gaseous transparency can increase substantially.

In the whole working process, the low-flow-rate long-time working state can be adopted, and the stability and continuity of the smelting process are also ensured on the premise of not influencing the air pressure state of the smelting environment in the vacuum smelting chamber.

The internal circulation filtering device of the utility model is also applicable to vacuum melting systems such as vacuum arc melting.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An internal circulation filtering device for a vacuum or gas protection smelting system is characterized by comprising a dust removal pipeline (1), wherein a first vacuum valve (2), a water-cooling grid (3), a vacuum fan (4), a dust-free high-temperature-resistant filter element (5) and a second vacuum valve (6) are sequentially arranged in the dust removal pipeline (1); one end of the dust removal pipeline (1) close to the first vacuum valve (2) is connected to the top end of the vacuum smelting chamber (7), and the other end of the dust removal pipeline is connected to the lateral lower part of the vacuum smelting chamber (7).

2. The internal circulation filter device for the vacuum or gas protection smelting system according to claim 1, wherein the water-cooled grille (3) comprises an upper cover plate (3-4), a middle gap plate (3-6) and a lower cover plate (3-5) from top to bottom, and the upper cover plate (3-4), the middle gap plate (3-6) and the lower cover plate (3-5) are flexibly connected into an integral structure through side walls (3-7); a water cooling pipe (3-3) is arranged between the upper cover plate (3-4) and the middle gap plate (3-6), an air inlet (3-1) is arranged on a side wall (3-7) between the middle gap plate (3-6) and the lower cover plate (3-5), an air outlet (3-2) is arranged on the other side wall (3-7) opposite to the side wall where the air inlet (3-1) is arranged, and the air outlet (3-2) is adjacent to the upper cover plate (3-4).

3. The internal circulation filter arrangement for a vacuum or gas-shielded smelting system according to claim 2, wherein the water-cooled tubes (3-3) between the upper cover plate (3-4) and the intermediate space plate (3-6) are arranged in a serpentine manner.

4. The internal circulation filtering device for the vacuum or gas protection smelting system according to claim 2, wherein the pipe orifices at both ends of the water cooling pipes (3-3) extend out from the upper cover plate (3-4), and the pipe orifice at one end close to the gas outlet (3-2) is a water inlet and is connected to a cold water inlet device; the other end pipe orifice is a water outlet and is connected to a water outlet device.

5. The internal circulation filter arrangement for a vacuum or gas-shielded smelting system according to claim 2, wherein the intermediate gap plates (3-6) are two, one on each side of the side walls (3-7).

6. The internal circulation filter device for the vacuum or gas-shielded smelting system according to claim 1, wherein the water-cooled grille (3), the vacuum fan (4) and the dust-free high temperature-resistant filter element (5) are all detachably arranged.

7. The internal circulation filter device for a vacuum or gas-shielded smelting system according to claim 1, wherein the vacuum smelting chamber (7) is provided with a smelting crucible (9) and a casting mold (10), and the smelting crucible (9) is higher than the casting mold (10); the vacuum melting chamber (7) is connected with a vacuum pump (8).

8. The internal circulation filter arrangement for a vacuum or gas-shielded smelting system according to claim 1, characterized in that the end of the dust removal duct (1) near the first vacuum valve (2) is connected to the top end of the vacuum smelting chamber (7) above the smelting crucible (9); the position of a pipe orifice of the dust removal pipeline (1) connected to the lateral lower part of the vacuum smelting chamber (7) is lower than the top of the casting mold (10).

9. The internal circulation filter arrangement for a vacuum or gas-shielded smelting system according to claim 1, wherein the total length of the dust removal duct (1) is 1-4 meters.

10. The internal circulation filter arrangement for a vacuum or gas shield smelting system as claimed in claim 2, wherein the length of the mid-gap plate (3-6) is 1/4-1/3 of the length of the lower deck plate (3-5).