CN209902221U

CN209902221U - Gas filtering device and vacuum die-casting device

Info

Publication number: CN209902221U
Application number: CN201821666768.2U
Authority: CN
Inventors: 付加攀; 张逸智
Original assignee: Shenzhen Xinshen New Material Technology Co Ltd
Current assignee: Shenzhen Xinshen New Material Technology Co Ltd
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2020-01-07
Anticipated expiration: 2028-10-15

Abstract

The utility model discloses a gas filtering device and vacuum die-casting device. The gas filtering device comprises a housing unit having an inlet for the gas to be cleaned; the filter element is arranged in the shell unit, a gap penetrating through the side wall is formed in the side wall of the filter element, and the gas to be cleaned can rotate in the filter element so as to throw impurities in the gas out of the gap; the air inlet pipe is arranged on the shell unit and communicated with the air inlet of the filter element; the upper end of the air outlet pipe is provided with at least one first opening, the lower end of the air outlet pipe extends into the filter element and is provided with at least one second opening, and the cleaned air flows out of the filtering device through the air outlet pipe. The device can ensure the vacuumizing efficiency while realizing the separation of gas and impurities, is favorable for realizing the stable and efficient vacuumizing of the vacuum die-casting device, and improves the vacuum degree of a vacuum die-casting cavity.

Description

Gas filtering device and vacuum die-casting device

Technical Field

The utility model relates to a filter equipment especially relates to a filter equipment of vacuum die-casting exhaust pipeline to and use this gas filtering device's vacuum die-casting device.

Background

The aluminum alloy has the advantages of high specific strength, good manufacturability, low cost and the like, and is widely applied to industries of automobiles, communication, electronics and the like. Die casting is an important precision forming method and is widely applied to manufacturing of aluminum alloy components. During die casting, the die casting machine presses molten metal into a cavity formed by the metal die at a very high speed, and the die is opened after the molten metal is cooled, and a casting is taken out. Because the filling speed is extremely high, the gas in the cavity is not discharged completely and is involved in the casting to form a gas hole. The vacuum die casting is characterized in that a powerful vacuum pumping system is additionally arranged on the basis of the traditional die casting, and the gas in a cavity is partially pumped out before filling, so that the gas-induced defects are reduced. Compared with the traditional die casting, the vacuum die casting has the advantages of high casting integrity, heat treatment reinforcement, weldability and the like, and is more and more widely applied to high-performance structural parts.

The stable and efficient vacuumizing efficiency is important for vacuum die casting. In the vacuum die-casting production, the release agent, the lubricant, the molten metal and the like in the cavity are easily drawn into the vacuum pipeline along with the gas flowing at high speed, and even enter the vacuum pump. Which may eventually lead to a decrease in the efficiency of the vacuum extraction and even to a blockage of the vacuum line, and in the worst case, to a malfunction of the vacuum pump.

The prior filter usually adopts a porous structure, and impurity particles can not pass through smaller holes than the filter, so that the impurity particles can be filtered out. However, such a separator device has a reduced pumping efficiency and is prone to clogging, and must be replaced frequently. The die casting has high production efficiency and fast pace, and the operation is not desired to be frequently interrupted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas filtering device can clean the gas that comes from the die cavity high-efficiently, and can not reduce evacuation efficiency, is difficult to produce moreover because of blockking up the frequent outage that causes.

The utility model also provides a vacuum die-casting device.

The utility model provides a technical scheme that its technical problem adopted is:

a gas filtration device comprising:

a housing unit having an inlet for gas to be cleaned;

the filter element is arranged in the shell unit, the side wall of the filter element is provided with blades to form a gap penetrating through the side wall, and the gas to be cleaned can rotate in the filter element so as to throw impurities in the gas out of the gap;

the air inlet pipe is arranged on the shell unit and communicated with the air inlet of the filter element;

the upper end of the air outlet pipe is provided with at least one first opening, the lower end of the air outlet pipe extends into the filter element and is provided with at least one second opening, and the cleaned air flows out of the filtering device through the air outlet pipe.

As a further improvement of the above solution, the blades are distributed in a spiral downward direction.

As a further improvement mode of the scheme, the bottom of the filter element is provided with at least one third opening, and impurities in the gas can leave from the third opening.

As a further improvement of the scheme, the side wall is provided with not less than 3 blades along the circumferential direction.

As a further improvement of the scheme, the gas to be cleaned enters the interior of the filter element along the tangential direction of the side wall, and the rotating direction of the gas to be cleaned is the same as the flowing direction of the gas.

As a further improvement of the above, the second opening is lower than the bottom of the blade.

As a further improvement of the above, the housing unit includes a housing and a housing bottom cover, the bottom of the housing is provided with a fourth opening for taking out the separated impurities, and the fourth opening is closed by the housing bottom cover separable from the housing.

As a further improvement mode of the above scheme, the shell unit further comprises a shell cover plate, the top of the shell is provided with a fifth opening, the fifth opening is sealed by the shell cover plate which can be separated from the shell, and the upper end of the air outlet pipe is hermetically connected with the shell cover plate and extends out of the outer side of the shell cover plate.

As a further improvement mode of the scheme, one end of the air inlet pipe, which is connected with the shell, is provided with a rectangular cross section, and one end of the air inlet pipe, which is far away from the shell, is provided with a circular cross section.

The utility model provides a vacuum die-casting device, includes mould, vacuum pump and above-mentioned gas filtering device, and the mould has the die cavity, and gas filtering device's intake pipe and die cavity intercommunication, gas filtering device's outlet duct and vacuum pump intercommunication.

The beneficial effects of the utility model reside in that:

this device uses the principle that adopts the gas dynamics, realizes the separation of gas and impurity, compares porous formula impurity intercepting device in the past, and separation efficiency is higher, and is difficult to produce and blocks up, reduces and maintains the interrupt.

The utility model discloses a preferred embodiment is provided with the intake pipe of gradual change, need not to reduce the sectional area of outside vacuum pipe, consequently can be under the circumstances of guaranteeing evacuation efficiency, realizes the separation of gas and impurity.

The utility model discloses a preferred embodiment is provided with but casing and casing bottom of split, after filtering the jam in the past, can't clear up, can only change, and this device bottom is equipped with row sediment device, after using a period, can open the casing bottom, clears up, realizes recycling, is favorable to reduce cost.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a cross-sectional view of one embodiment of a filter assembly of a vacuum die cast extraction duct;

FIG. 2 is an exploded schematic view of an embodiment of a filter assembly of a vacuum die cast extraction duct;

fig. 3 is a schematic view of an embodiment of a vacuum die casting apparatus.

Detailed Description

The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the description of the upper, lower, left, right, front, rear, etc. used in the present invention is only relative to the mutual position relationship of the components of the present invention in the drawings.

Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

As shown in fig. 1 and 2, the gas filtering device 1 for a vacuum die-cast extraction duct comprises a housing unit and a variable-section inlet duct 13. Wherein, the housing unit of filter equipment includes: the filter comprises a shell 2, a shell bottom cover 7, a shell cover plate 11, a filter element 4 and an air inlet and outlet pipe 5. The shell 2, the shell bottom cover 7 and the shell cover plate 11 jointly surround to form a cavity, the air outlet pipe 5 is distributed along the length direction of the shell, one end of the air outlet pipe penetrates through the cover plate 11 and extends out of the shell, and the other end of the air outlet pipe is positioned in the cavity. Be provided with entry 3 on casing 2, entry 3 has intake pipe 13 through flange joint, and the air current gets into filter equipment through the inlet pipe mouth 15 of intake pipe 13, and the clean gaseous rethread outlet duct 5's after the filter core 4 filters first opening 16 outflow filter equipment.

The air inlet pipe orifice 15 of the air inlet pipe 13 is circular and is used for being connected with an external vacuum pipeline, and the vacuum pipeline does not need to be adjusted. The other port 14 of the inlet pipe 13 connected to the housing 2 is rectangular, and the width of the port 14 is narrow, i.e. the inlet pipe 13 has a gradually changing cross section for guiding the air flow along the inner wall of the filter element 4. The port 14 is connected to the housing 2 by means of a flange seal.

Between casing 2 and the intake pipe 13, between casing apron 11 and the outlet duct 5, all adopt sealing connection's mode to assemble between casing 2 and the casing bottom 7 and between casing apron 11 and the casing 2, the dismouting of realization shell unit that so can be very convenient helps clearing up sedimentary impurity among the filter equipment. In this embodiment, the housing 2 and the air inlet pipe 13, the housing 2 and the housing bottom cover 7, and the housing cover plate 11 and the housing 2 are preferably connected by sealing with flanges.

The filter element 4 is installed inside the housing unit, and gas and impurities are separated by the filter element 4. The filter element 4 is preferably of a cylindrical structure, and specifically comprises an upper cylindrical section and a lower conical section, wherein the side wall of the cylindrical section is provided with a plurality of gaps 17, in this embodiment, 18 gaps are provided, the pipe wall between adjacent gaps is a helical blade, and the gaps 17 and the helical blade jointly form a filter screen area. The slits 17 are distributed in the direction of the helix, the pitch of which is 120mm and the outer diameter of which is 90 mm. The bottom of the conical section is provided with a third opening 8. The filter cartridge 4 is clamped to the inlet 3 of the housing unit through the inlet 12 and communicates with the inlet 3 of the housing 2.

The air outlet pipe 5 comprises a round pipe fixed on the shell cover plate 11 in a welding mode to ensure the air tightness. The outer diameter of the air outlet pipe 5 is the same as the inner diameter of an external vacuum pipeline, and the air outlet pipe can be inserted into the vacuum pipeline to realize connection; the part of the outlet pipe 5 in the shell 2 is positioned in the center of the filter element 4, and the second opening 9 at the bottom of the outlet pipe 5 is lower than the bottom of the blade 17.

In operation, after the air flow enters the interior of the filter element 4 from the inlet 12, the air flow is directed by the helical blades to make a circular motion in a spiral downward direction. When the air flow wrapped with the impurities does circular motion on the inner wall of the filter element, the impurities with higher density are thrown out through the gap 17 and fall into the shell bottom cover 7 of the shell unit. During this time, most of the impurities can be thrown out through the slits and fall onto the housing bottom cover 7 of the housing unit, and the remaining small amount of impurities can fall onto the housing bottom cover 7 of the housing unit through the third opening 8 at the bottom of the filter element 4. It should be noted that, in the falling process of the air flow, the air flow always makes a circular motion, and because the density of the impurities is high, the air flow always moves in a direction away from the air outlet pipe 5, and therefore, the impurities are not sucked into the air outlet pipe 5. And the gas purified by the filter element 4 enters the outlet pipe from the second opening 9 at the bottom of the outlet pipe 5 and is discharged from the first opening 16 at the top of the outlet pipe 5.

Referring to fig. 3, the utility model also discloses a vacuum die-casting system, it includes: the fixed die 22, the movable mould 23, the die cavity 24 that fixed die and movable mould formed, feed inlet 25, press the room 27, drift 26, vacuum pump 19, vacuum pipe 20 and foretell gas filter equipment 1 are equipped with negative pressure jar 18 between vacuum pump and the mould, are equipped with vacuum stop valve 21 between negative pressure jar and the mould, gas filter equipment's intake pipe 13 with die cavity 24 intercommunication, gas filter equipment's outlet duct 5 with vacuum pump 19 intercommunication adopts sealed connected mode between filter equipment's intake pipe 13 and the vacuum pipe to link to each other with die cavity 24 through vacuum pipe. The outlet pipe 5 of the filtering apparatus is connected to a vacuum pipe 20, and the gas flows into the vacuum pipe 20 through a first opening 16 at the top of the outlet pipe 5 and is finally pumped out by a vacuum pump 19. The vacuum stop valve 21 is opened when the punch head advances to the sealing pressure chamber 25, the vacuum system starts to vacuumize the cavity 24, and the vacuum stop valve 21 is closed before the molten metal reaches the end of mold filling, and vacuumizing is stopped.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A gas filtration device, comprising:

a housing unit with an inlet (3) for gas to be cleaned;

the filter element (4) is arranged in the shell unit, a gap (17) penetrating through the side wall is formed in the side wall of the filter element, and gas to be cleaned can rotate in the filter element (4) so that impurities in the gas can be thrown out of the gap;

the air inlet pipe (13) is arranged on the shell unit, and the air inlet pipe (13) is communicated with an air inlet of the filter element (4);

set up outlet duct (5) on housing unit, the upper end of outlet duct (5) is equipped with at least one first opening (16), the lower extreme of outlet duct (5) stretches into in filter core (4) to be equipped with and be no less than one second opening (9), gas after the cleaning passes through outlet duct (5) outflow filter equipment (1).

2. A gas filtering device according to claim 1, wherein the slits (17) are distributed in a spiral downward direction.

3. A gas filtering device according to claim 1, characterized in that the bottom of the filter element (4) is provided with at least one third opening (8), from which third opening (8) impurities in the gas can leave the filter element (4).

4. A gas filtering device according to claim 1, wherein said side wall is provided with not less than 3 of said slits (17) in the circumferential direction.

5. A gas filtering device according to claim 1, wherein the gas to be cleaned enters the inside of the filter element (4) in a tangential direction of the side wall and the rotation direction of the gas to be cleaned is the same as the gas inflow direction.

6. A gas filtering device according to claim 1, wherein the second opening (9) is lower than the bottom of the slit (17).

7. A gas filtering device according to claim 1, wherein the housing unit comprises a housing (2) and a housing bottom cover (7), the bottom of the housing (2) being provided with a fourth opening (6) for removing separated impurities, the fourth opening (6) being closed by the housing bottom cover (7) being separable from the housing (2).

8. A gas filtering device according to claim 7, wherein the housing unit further comprises a housing cover plate (11), a fifth opening (10) is provided at the top of the housing (2), the fifth opening (10) is closed by the housing cover plate (11) which is separable from the housing (2), and the upper end of the gas outlet pipe (5) is hermetically connected with the housing cover plate (11) and protrudes outside the housing cover plate (11).

9. A gas filtering device according to claim 7, characterized in that the end of the inlet pipe (13) connected to the housing (2) has a rectangular cross-section, and the end of the inlet pipe (13) remote from the housing (2) has a circular cross-section.

10. A vacuum die casting device, characterized by comprising a mould, a vacuum pump (19) and a gas filtering device according to any one of claims 1 to 9, the mould having a cavity (24), the gas inlet pipe (13) of the gas filtering device being in communication with the cavity (24), the gas outlet pipe (5) of the gas filtering device being in communication with the vacuum pump (19).