Vacuum filter device for electron beam cooling bed vacuum melting furnace

Abstract

According to the vacuum filter device for the electron beam cooling bed vacuum melting furnace, a bottom cover is hinged to a shell through a hinge assembly, the bottom cover and the shell are fixedly connected into a whole through a plurality of locking assemblies circumferentially and evenly distributed on the outer wall of the bottom cover, and an air inlet round pipe with the lower end penetrating into the shell is fixed to the upper end face of the shell; a filtering assembly is installed on the outer circumferential wall of the lower end of the air inlet round pipe, an air outlet round pipe communicated with the interior of the shell is fixed to the outer wall of the upper end of the shell, a pipe opening of the air inlet round pipe is communicated with an air outlet of equipment, and the air outlet round pipe is communicated with an exhaust pipe outside the equipment. A plug used for sealing the oil outlet hole is detachably fixed to the bottom cover in a sealed mode. The problems that a traditional filter is low in filtering efficiency and the filtering capacity cannot meet the requirement are effectively solved, the bottom cover is convenient and fast to open, close and lock, the filtering assembly in the shell is convenient to detach, clean and replace, and the cost is low; and the gas treatment capacity is large, and the whole vacuum unit is vacuumized and filtered.

Description

Technical Field

[0001] The utility model belongs to the technical field of electron beam cooling bed melting furnaces, and in particular relates to a vacuum filter device for an electron beam cooling bed vacuum melting furnace. Background Art

[0002] At present, the electron beam cold hearth melting furnace (EB furnace for short) is an important equipment for melting titanium and titanium alloys; EB furnace melting is carried out under high vacuum, the working vacuum degree of melting is 0.13Pa, the temperature of the melting area in the melting chamber can reach 3000℃ during operation, there are many metal volatiles, and the raw material for melting in the electron beam cold hearth melting furnace is sponge titanium, which contains Cl. Cl will turn into HCl when it encounters H2O in the air, and these HCl will corrode the vacuum unit and pipeline; at the same time, in order to ensure the working vacuum degree, an oil diffusion jet pump is used. The oil of the oil diffusion jet pump will enter the vacuum pipeline due to poor cooling, and the filters on the market currently have low gas processing capacity. The same processing capacity needs to be installed in multiple units, and the filtering cost is high. Therefore, in order to ensure the melting reliability of the electron beam cold hearth melting furnace, it is necessary to design a vacuum filter device for filtering metal volatiles, chlorine gas, oil stains and dust generated during the smelting process. Utility Model Content

[0003] The technical problem solved by the utility model is as follows: a vacuum filter device for an electron beam cooling bed vacuum melting furnace is provided. By optimizing the traditional filter structure, a filter assembly arranged in an outer shell and installed at the lower end of an air inlet circular pipe is used to process the gas fed into the outer shell and discharge the processed gas through an air outlet circular pipe, so that metal volatiles, dust, oil and gas are deposited in the bottom cover through the filter assembly, which effectively solves the problem that the traditional filter has low filtering efficiency and filtering capacity that does not meet the requirements. The bottom cover is convenient and quick to open, close and lock, and the filter assembly in the outer shell is convenient to disassemble, clean and replace, with low cost; the gas processing capacity is large, which can meet the exhaust filtration of the entire vacuum unit.

[0004] The technical solution adopted by the utility model: a vacuum filter device for an electron beam cooling bed vacuum melting furnace, comprising an outer shell with a hollow structure and a bottom cover located at the lower port position of the outer shell, the bottom cover and the outer shell are hinged by a hinge assembly, and the bottom cover and the outer shell are fixedly connected as a whole by a plurality of locking components uniformly distributed on the outer wall of the bottom cover, an upper end face of the outer shell is fixed with an air inlet pipe whose lower end passes through the interior of the outer shell, and a filter assembly located in the outer shell is installed on the outer circumferential wall of the lower end of the air inlet pipe, an air outlet pipe connected with the interior of the outer shell is fixed on the outer wall of the upper end of the outer shell, and the pipe mouth of the air inlet pipe is connected with the air outlet of the equipment and the air outlet pipe is connected with the exhaust pipe outside the equipment, the lower end face of the bottom cover is provided with an oil outlet hole for discharging the oil filtered inside, and a plug for sealing the oil outlet hole is detachably sealed and fixed on the bottom cover.

[0005] Wherein, the filter assembly includes a filter element with an open upper end and a mesh structure on the lower end surface, a lower filter cotton plate and an upper filter cotton plate; an inner cylinder fixed in the middle of the lower end plate surface of the filter element is sleeved on the air intake circular tube, and the filter element is positioned and sealed on the air intake circular tube by a locking connection component detachably fixed to the lower end of the air intake circular tube; the lower filter cotton plate, the upper filter cotton plate and the support member arranged between the lower filter cotton plate and the upper filter cotton plate are positioned in the filter element by a pressure ring fixed to the upper end of the filter element; a pressure block for positioning and sealing the filter element is fixed on the inner wall of the outer shell.

[0006] Furthermore, the filter element includes a filter cartridge, an air outlet flange fixed to the lower end of the filter cartridge and having a mesh structure, an upper flange fixed to the upper end of the filter cartridge, a lower pressure ring block concentrically fixed to the center hole of the air outlet flange and having an annular structure, and an inner cartridge located in the filter cartridge and concentrically fixed to the lower pressure ring block. A plurality of handles are evenly distributed on the circumference of the outer edge of the bottom surface of the air outlet flange, a plurality of screws evenly distributed on the circumference of the pressure ring are adaptably connected to threaded holes at corresponding positions on the upper flange, a sealing groove is formed on the outer edge of the upper end surface of the upper flange, and a convex ring on the lower end surface of the inner edge of the pressure block abuts against a sealing ring in the sealing groove.

[0007] Furthermore, the support member includes a support ring and blades uniformly distributed on the outer circumferential wall of the support ring.

[0008] Furthermore, the locking connection assembly includes a fixed thread sleeve and a fixed sleeve, the upper end of the fixed thread sleeve is located in the inner cylinder, and the upper end of the fixed thread sleeve is concentrically fixed to the lower end of the air intake pipe, the external thread of the lower end of the fixed thread sleeve is adaptively connected with the internal thread of the fixed sleeve, and the fixed sleeve is provided with a sealing block located at the upper end of the positioning platform and a sealing ring 2 adapted to the inner ring groove of the lower pressure ring block, and the sealing block presses the sealing ring 2 against the inner ring groove of the lower pressure ring block by rotating the fixed sleeve, thereby realizing the disassembly and assembly of the filter element on the air intake pipe.

[0009] Furthermore, the hinge assembly includes an upper support, a lower support and a fixed shaft. The upper support and the lower support have the same structure, both of which are composed of an arc-shaped base plate and a triangular support fixed on the outer wall of the arc-shaped base plate. The upper support is fixed to the outer wall of the lower end of the shell, and the upper end of the fixed shaft is adapted and fixedly connected with the arc-shaped groove on the triangular support in the upper support. The fixed shaft is provided with a sleeve located below its upper shaft shoulder and adapted and fixedly connected with the arc-shaped groove on the triangular support in the lower support, and the positioning sleeves are provided at both ends of the sleeve. The sleeve is provided below The thrust bearing is installed on the fixed shaft and positioned in the bearing hole at the upper end of the adjusting seat. The lower end of the fixed shaft is adaptably connected to the threaded hole connected to the bearing hole at the lower end of the adjusting seat. The arc-shaped bottom plate of the lower support contacts the outer circumferential wall of the bottom cover, and the thrust bearing, sleeve and lower support are moved up to the upper edge of the arc-shaped bottom plate of the lower support and pressed against the upper flange ring plate at the upper end of the bottom cover by rotating the adjusting seat, so that the hinge assembly locks the bottom cover and the outer shell. A positioning end plate for preventing the adjusting seat from falling off is fixed on the lower end surface of the fixed shaft.

[0010] Furthermore, the locking assembly includes a connecting pin, a plurality of hinge seats are evenly distributed on the outer circumferential wall of the upper end of the bottom cover, and the spherical end pin at the lower end of the connecting pin is connected to the hinge seat, and the upper flange ring plate of the upper port of the bottom cover and the lower flange ring plate of the lower port of the outer shell have a plurality of corresponding grooves evenly distributed on the circumference of the plate surface outer edge, and the upper end of the connecting pin is rotatably adapted to be fitted in the grooves of the lower flange ring plate and the upper flange ring plate, and the lower flange ring plate and the upper flange ring plate are detachably fixed together by a locking nut threadedly connected to the upper end of the connecting pin.

[0011] Furthermore, flange plates are fixed at the outer port positions of the air inlet circular pipe and the air outlet circular pipe, and the upper end surface of the outer shell is fixed with connecting supports located on both sides of the air inlet circular pipe and used for fixed connection with the equipment, and the outer side wall of the connecting support is provided with a reinforcing rib plate fixedly connected to the upper end surface of the outer shell.

[0012] Furthermore, the plug is threadedly fixed to the oil outlet hole, and a sealing gasket is mounted on the plug to tightly abut against the bottom surface of the bottom cover.

[0013] The advantages of this utility model compared with the prior art:

[0014] 1. This technical solution optimizes the structure of the traditional filter, adopts a filter assembly arranged in the shell and installed at the lower end of the air inlet round pipe to process the gas sent into the shell and discharge the processed gas through the air outlet round pipe, so that metal volatiles, dust, oil and gas are deposited in the bottom cover through the filter assembly, effectively solving the problem that the traditional filter has low filtering efficiency and filtering capacity that does not meet the requirements. The bottom cover is easy to open and close and lock, and the filter assembly in the shell is easy to disassemble, clean and replace, with low cost; the gas processing capacity is large, which can meet the exhaust filtration of the entire vacuum unit;

[0015] 2. The housing and the bottom cover of the technical solution are hinged by a hinge assembly, which provides conditions for the rapid opening of the bottom cover. After opening, it does not interfere with the lower port space of the housing, which is convenient for cleaning and replacing the lower filter cotton plate and the upper filter cotton plate inside the housing. The housing and the bottom cover are fixedly connected by multiple locking components evenly distributed around the circumference to ensure the reliability of the connection between the two.

[0016] 3. The filter element of this technical solution adopts a two-level filtering structure formed by a lower filter cotton plate and an upper filter cotton plate distributed from bottom to top, which has a good filtering effect and improves the cleanliness of the exhaust gas;

[0017] 4. This technical solution has a simple structure, compact and reasonable overall structure distribution, small space occupation, strong processing capacity, effectively reduces the gas filtration cost of the vacuum unit, and has high use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the housing of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the support member of the utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the filter element of the utility model;

[0023] Figure 6 This is a schematic diagram of the internal structure of the filter element of the utility model;

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of the hinged assembly of the utility model;

[0025] Figure 8 This is a cross-sectional view of the hinge assembly connection structure of the utility model;

[0026] Fig. 9 for Figure 2 A partial enlarged schematic diagram in the middle. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiment of the present utility model Figure 1-9 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0030] Vacuum filter device for electron beam cooling bed vacuum melting furnace, such as Figure 1-9As shown, it includes a shell 1 with a hollow structure and a bottom cover 2 located at the lower port of the shell 1, the bottom cover 2 and the shell 1 are hinged by a hinge assembly, and the bottom cover 2 and the shell 1 are fixedly connected as a whole by a plurality of locking components uniformly distributed on the outer wall of the bottom cover 2, the upper end surface of the shell 1 is fixed with an air inlet pipe 3 whose lower end penetrates into the interior of the shell 1, and the outer circumferential wall of the lower end of the air inlet pipe 3 is installed with a filter assembly located in the shell 1, the outer wall of the upper end of the shell 1 is fixed with an air outlet pipe 4 connected with the interior thereof, and the pipe mouth of the air inlet pipe 3 is connected with the air outlet of the equipment and the air outlet pipe 4 is connected with the exhaust pipe outside the equipment, the lower end surface of the bottom cover 2 is provided with an oil outlet hole for discharging the internal filtered oil, and a plug 5 for sealing the oil outlet hole is detachably sealed and fixed on the bottom cover 2; specifically, the plug 5 is connected to the oil outlet The hole is threadedly connected, and a sealing gasket is mounted on the plug 5, which is tightly pressed against the bottom surface of the bottom cover 2. Since the oil in the gas discharged from the equipment is heavy, it is all deposited in the bottom cover 2. It is only necessary to regularly discharge and clean the oil in the bottom cover 2 through the plug 5; in the above structure, by optimizing the traditional filter structure, a filter assembly arranged in the shell 1 and installed at the lower end of the air inlet pipe 3 is used to treat the gas fed into the shell 1 and the treated gas is discharged through the air outlet pipe 4, so that metal volatiles, dust, and oil and gas are deposited in the bottom cover 2 through the filter assembly, which effectively solves the problem that the traditional filter has low filtering efficiency and filtering capacity that does not meet the requirements. The bottom cover 2 is convenient and quick to open, close and lock, and the filter assembly in the shell 1 is convenient to disassemble, clean and replace, and the cost is low; the gas processing capacity is large, which can meet the exhaust filtration of the entire vacuum unit;

[0031] like Figure 2 , 56, the specific structure of the filter assembly is as follows: the filter assembly includes a filter element 6 with an upper end opening and a lower end surface with a mesh structure, a lower filter cotton plate 7 and an upper filter cotton plate 8, the inner cylinder 6-5 fixed in the middle of the lower end plate surface of the filter element 6 is sleeved on the air intake pipe 3, and the filter element 6 is positioned and sealed on the air intake pipe 3 through a locking connection component detachably connected to the lower end of the air intake pipe 3, the lower filter cotton plate 7, the upper filter cotton plate 8 and the support member 9 arranged between the lower filter cotton plate 7 and the upper filter cotton plate 8 are positioned in the filter element 6 through a pressure ring 10 fixed to the upper end of the filter element 6, and a pressure block 11 for positioning and sealing the filter element 6 is fixed on the inner wall of the shell 1; in the above structure, the air entering from the air intake pipe 3 is The oil is sent into the shell 1 and the bottom cover 2, and the oil is deposited in the bottom shell 2. The remaining air and impurities in the air are filtered twice by the lower filter cotton plate 7 and the upper filter cotton plate 8, and then discharged through the air outlet circular pipe 4. In the above structure, the shell 1 and the bottom cover 2 are hinged by a hinge assembly, which provides conditions for the rapid opening of the bottom cover 2. After opening, it does not interfere with the lower port space of the shell 1, which is convenient for cleaning and replacing the lower filter cotton plate 7 and the upper filter cotton plate 8 inside the shell 1. The shell 1 and the bottom cover 2 are fixedly connected by multiple locking components evenly distributed around the circumference to ensure the reliability of the connection between the two. The secondary filtering structure formed by the lower filter cotton plate 7 and the upper filter cotton plate 8 distributed from bottom to top has a good filtering effect and improves the cleanliness of the exhaust gas.

[0032] like Figure 5 , 6 As shown, the specific structure of the filter element 6 is as follows: the filter element 6 includes a filter cartridge 6-1, an outlet flange 6-2 fixed to the lower end of the filter cartridge 6-1 and having a mesh structure, an upper flange 6-3 fixed to the upper end of the filter cartridge 6-1, a lower pressure ring block 6-4 concentrically fixed to the center hole position of the outlet flange 6-2 and having an annular structure, and an inner cylinder 6-5 located in the filter cartridge 6-1 and concentrically fixed to the lower pressure ring block 6-4. A plurality of handles 6-6 are evenly distributed on the circumference of the outer edge of the bottom surface of the outlet flange 6-2, a plurality of screws evenly distributed on the circumference of the pressure ring 10 are adapted to be connected with threaded holes at corresponding positions on the upper flange 6-3, a sealing groove 6-7 is formed on the outer edge of the upper end surface of the upper flange 6-3, and a convex ring on the lower end surface of the inner edge of the pressure block 11 abuts against a sealing ring 6-8 in the sealing groove 6-7 to prevent unfiltered air from entering the outlet circular pipe 4 through the gap between the inner cylinder 6-5 and the air inlet circular pipe 3 and being sent out.

[0033] like Figure 4 As shown, the support member 9 includes a support ring 9-1 and blades 9-2 uniformly distributed on the outer circumferential wall of the support ring 9-1, so as to ensure that the support strength meets the use requirements without affecting the smooth passage of airflow.

[0034] like Figure 2 , 9As shown, the specific structure of the locking connection assembly is as follows: the locking connection assembly includes a fixed thread sleeve 12 and a fixed sleeve 13, the upper end of the fixed thread sleeve 12 is located in the inner cylinder 6-5, and the upper end of the fixed thread sleeve 12 is concentrically fixed to the lower end of the air intake pipe 3, the external thread of the lower end of the fixed thread sleeve 12 is adaptively connected with the internal thread of the fixed sleeve 13, and the fixed sleeve 13 is sleeved with a sealing block 15 located at the upper end of the positioning platform and a sealing ring 2 14 adapted to the inner ring groove of the lower pressure ring block 6-4, and the sealing block 15 presses the sealing ring 2 14 against the inner ring groove of the lower pressure ring block 6-4 by rotating the fixed sleeve 13, so as to realize the disassembly and assembly of the filter element 6 on the air intake pipe 3; the filter element 6 is regularly dismantled and cleaned by rotating the fixed sleeve 13, and the disassembly and assembly are convenient and quick, thereby ensuring the reliable and stable filtering performance of the filter element 6.

[0035] like Figure 7-8 As shown, the specific structure of the hinge assembly is as follows: the hinge assembly includes an upper support 16, a lower support 17 and a fixed shaft 18. The structures of the upper support 16 and the lower support 17 are the same, both of which are composed of an arc-shaped bottom plate and a triangular support fixed on the outer wall of the arc-shaped bottom plate. The upper support 16 is fixed to the outer wall of the lower end of the housing 1, and the upper end of the fixed shaft 18 is adapted and fixedly connected with the arc groove on the triangular support in the upper support 16. The fixed shaft 18 is provided with a sleeve 19 located below its upper shoulder and adapted and fixedly connected with the arc groove on the triangular support in the lower support 17, and the sleeve 19 is provided with a positioning sleeve 22 at both ends. The thrust bearing 20 below the sleeve 19 is installed on the fixed shaft 18 and positioned in the bearing hole at the upper end of the adjusting seat 21. The lower end of the fixed shaft 18 is connected to the lower end of the adjusting seat 21 with a screw hole connected to the bearing hole. The perforations are adapted to be connected, and the arc-shaped bottom plate of the lower support 17 contacts the outer circumferential wall of the bottom cover 2, and the thrust bearing 20, the sleeve 19 and the lower support 17 are moved up to the upper edge of the arc-shaped bottom plate of the lower support 17 by rotating the adjusting seat 21, and the upper flange ring plate 2-1 at the upper end of the bottom cover 2 is pressed tightly against the bottom cover 2, so that the hinge assembly locks the bottom cover 2 and the outer shell 1, and the lower end surface of the fixed shaft 18 is fixed with a positioning end plate 23 for preventing the adjusting seat 21 from falling off; in the above structure, under the premise that all the locking components are contacted and locked, the adjusting seat 21 is loosened, so that the thrust bearing 20, the sleeve 19 and the lower support 17 are moved down to the upper edge of the arc-shaped bottom plate of the lower support 17 and the lower flange ring plate 2-1 at the upper end of the bottom cover 2 to create a gap, and at this time, the bottom cover 2 can be rotated to open the lower port of the outer shell 1, and after opening, the filter assembly can be cleaned and maintained.

[0036] like Figure 1As shown, the specific structure of the locking assembly is as follows: the locking assembly includes a connecting pin 24, a plurality of hinge seats 25 are evenly distributed on the outer circumferential wall of the upper end of the bottom cover 2, and the spherical end pin of the lower end of the connecting pin 24 is connected to the hinge seat 25, and the upper flange ring plate 2-1 of the upper port of the bottom cover 2 and the lower flange ring plate 1-1 of the lower port of the shell 1 are evenly distributed on the circumference of the outer edge of the plate surface with a plurality of corresponding grooves, and the upper end of the connecting pin 24 is rotatably adapted to fit in the grooves of the lower flange ring plate 1-1 and the upper flange ring plate 2-1, and the lower flange ring plate 1-1 and the upper flange ring plate 2-1 are detachably fixed together by a locking nut 26 threadedly connected to the upper end of the connecting pin 24.

[0037] like Figure 1-3 As shown, flange plates are fixed at the outer port positions of the air inlet circular pipe 3 and the air outlet circular pipe 4, and the upper end surface of the outer shell 1 is fixed with connecting struts 27 located on both sides of the air inlet circular pipe 3 and used for fixed connection with the equipment, and the outer side wall of the connecting strut 27 is provided with a reinforcing rib plate 28 fixedly connected to the upper end surface of the outer shell 1.

[0038] This technical solution has a simple structure, a compact and reasonable overall structure distribution, a small footprint, a strong processing capacity, and effectively reduces the gas filtration cost of the vacuum unit, and has a high use value.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vacuum filter device for an electron beam cooling bed vacuum melting furnace, characterized in that: The invention comprises a shell (1) of a hollow structure and a bottom cover (2) located at a lower port of the shell (1), wherein the bottom cover (2) and the shell (1) are hingedly connected by a hinge assembly, and the bottom cover (2) and the shell (1) are fixedly connected as a whole by a plurality of locking assemblies uniformly distributed on the outer wall of the bottom cover (2). The upper end surface of the shell (1) is fixed with an air intake pipe (3) whose lower end penetrates into the interior of the shell (1), and a filter assembly located in the shell (1) is installed on the outer circumferential wall of the lower end of the air intake pipe (3). The upper outer wall of the shell (1) is fixed with an air outlet pipe (4) connected with the interior thereof, and the pipe mouth of the air intake pipe (3) is connected with the air outlet of the device, and the air outlet pipe (4) is connected with the exhaust pipe outside the device. The lower end surface of the bottom cover (2) is provided with an oil outlet hole for discharging the oil filtered inside, and a plug (5) for sealing the oil outlet hole is detachably sealed and fixed on the bottom cover (2).

2. The vacuum filter device for an electron beam cooling hearth vacuum melting furnace according to claim 1, characterized in that: The filter assembly comprises a filter element (6) with an open upper end and a mesh structure at the lower end, a lower filter cotton plate (7) and an upper filter cotton plate (8); an inner cylinder (6-5) fixed at the middle of the lower end plate surface of the filter element (6) is sleeved on the air intake circular tube (3), and the filter element (6) is positioned and sealed on the air intake circular tube (3) by a locking connection component detachably fixed to the lower end of the air intake circular tube (3); the lower filter cotton plate (7), the upper filter cotton plate (8) and a support member (9) arranged between the lower filter cotton plate (7) and the upper filter cotton plate (8) are positioned in the filter element (6) by a pressure ring (10) fixed to the upper end of the filter element (6); and a pressure block (11) for positioning and sealing the filter element (6) is fixed on the inner wall of the housing (1).

3. The vacuum filter device for the electron beam cooling hearth vacuum melting furnace according to claim 2, characterized in that: The filter element (6) comprises a filter cartridge (6-1), an outlet flange (6-2) fixed to the lower end of the filter cartridge (6-1) and having a mesh structure, an upper flange (6-3) fixed to the upper end of the filter cartridge (6-1), a lower pressure ring block (6-4) coaxially fixed to the center hole of the outlet flange (6-2) and having an annular structure, and an inner cylinder (6-5) located in the filter cartridge (6-1) and coaxially fixed to the lower pressure ring block (6-4), a plurality of handles (6-6) are evenly distributed on the circumference of the outer edge of the bottom surface of the outlet flange (6-2), a plurality of screws evenly distributed on the circumference of the pressure ring (10) are adapted to be connected with threaded holes at corresponding positions on the upper flange (6-3), a sealing groove (6-7) is formed on the outer edge of the upper end surface of the upper flange (6-3), and a convex ring on the lower end surface of the inner edge of the pressure block (11) abuts against a sealing ring (6-8) in the sealing groove (6-7).

4. The vacuum filter device for the electron beam cooling hearth vacuum melting furnace according to claim 3, characterized in that: The support member (9) comprises a support ring (9-1) and blades (9-2) uniformly distributed on the outer circumferential wall of the support ring (9-1).

5. The vacuum filter device for the electron beam cooling hearth vacuum melting furnace according to claim 4, characterized in that: The locking connection assembly comprises a fixed thread sleeve (12) and a fixed sleeve (13), the upper end of the fixed thread sleeve (12) is located in the inner tube (6-5), and the upper end of the fixed thread sleeve (12) is coaxially fixed to the lower end of the air intake pipe (3), the outer thread of the lower end of the fixed thread sleeve (12) is adaptively connected with the inner thread of the fixed sleeve (13), and the upper sleeve of the fixed sleeve (13) is provided with a sealing block (15) located at the upper end of the positioning platform and a sealing ring (14) adapted to the inner ring groove of the lower pressure ring block (6-4), and the sealing block (15) presses the sealing ring (14) against the inner ring groove of the lower pressure ring block (6-4) by rotating the fixed sleeve (13), thereby realizing the disassembly and assembly of the filter element (6) on the air intake pipe (3).

6. The vacuum filter device for an electron beam cooling hearth vacuum melting furnace according to claim 1, characterized in that: The hinge assembly comprises an upper support (16), a lower support (17) and a fixed shaft (18); the upper support (16) and the lower support (17) have the same structure, both of which are composed of an arc-shaped base plate and a triangular support fixed on the outer wall of the arc-shaped base plate; the upper support (16) is fixed to the outer wall of the lower end of the housing (1); the upper end of the fixed shaft (18) is adapted and fixedly connected to the arc-shaped groove on the triangular support in the upper support (16); the fixed shaft (18) is provided with a sleeve (19) located below its upper shaft shoulder and adapted and fixedly connected to the arc-shaped groove on the triangular support in the lower support (17); and bushings (22) are provided at both ends of the sleeve (19); a thrust bearing (20) below the sleeve (19) The bottom cover (2) is mounted on a fixed shaft (18) and positioned in a bearing hole at the upper end of an adjusting seat (21). The lower end of the fixed shaft (18) is adapted to be connected with a threaded hole at the lower end of the adjusting seat (21) and connected with the bearing hole. The arc-shaped bottom plate of the lower support (17) contacts the outer circumferential wall of the bottom cover (2). By rotating the adjusting seat (21), the thrust bearing (20), the sleeve (19) and the lower support (17) are moved upward to the upper edge of the arc-shaped bottom plate of the lower support (17) and pressed against the upper flange ring plate (2-1) at the upper end of the bottom cover (2), so that the hinge assembly locks the bottom cover (2) and the housing (1). A positioning end plate (23) for preventing the adjusting seat (21) from falling off is fixed to the lower end surface of the fixed shaft (18).

7. The vacuum filter device for an electron beam cooling hearth vacuum melting furnace according to claim 1, characterized in that: The locking assembly comprises a connecting pin (24), a plurality of hinge seats (25) are evenly distributed on the outer circumferential wall of the upper end of the bottom cover (2), and the spherical end of the lower end of the connecting pin (24) is pin-connected to the hinge seat (25), and the upper flange ring plate (2-1) of the upper end of the bottom cover (2) and the lower flange ring plate (1-1) of the lower end of the housing (1) are evenly distributed on the outer edge of the plate surface with a plurality of corresponding grooves, and the upper end of the connecting pin (24) is rotatably adapted to fit in the grooves of the lower flange ring plate (1-1) and the upper flange ring plate (2-1), and the lower flange ring plate (1-1) and the upper flange ring plate (2-1) are detachably fixedly connected as a whole by a locking nut (26) threadedly connected to the upper end of the connecting pin (24).

8. The vacuum filter device for an electron beam cooling hearth vacuum melting furnace according to any one of claims 1 to 7, characterized in that: Flange plates are fixed at the outer end positions of the air inlet circular tube (3) and the air outlet circular tube (4); the upper end surface of the outer shell (1) is fixed with connecting struts (27) located on both sides of the air inlet circular tube (3) and used for fixed connection with the equipment; and the outer side wall of the connecting strut (27) is provided with a reinforcing rib plate (28) fixedly connected to the upper end surface of the outer shell (1).

9. The vacuum filter device for an electron beam cooling hearth vacuum melting furnace according to claim 8, characterized in that: The plug (5) is threadedly connected to the oil outlet hole, and a sealing gasket is sleeved on the plug (5) and is tightly pressed against the bottom surface of the bottom cover (2).

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