Visual vacuum filter

Abstract

The utility model relates to a visible vacuum filter, and belongs to the technical field of vacuum static pouring equipment. According to the structure, limiting tables corresponding in position are arranged on the opposite surfaces of an upper flange and a lower flange, the limiting tables of the upper flange and the lower flange are jointly connected with an acrylic cylinder in a sealed mode, an air inlet and an air outlet are formed in the upper flange, a filter element is arranged in an inner cavity of the acrylic cylinder, and an outlet in the top of the filter element corresponds to the air outlet in position. The upper flange is in sealing connection with the lower surface of the upper flange; the air outlet is connected with the vacuum pump interface, and the air inlet is connected with external equipment. According to the visible vacuum filter, the outer cylinder adopts a visible acrylic cylinder structure, and the filter element is arranged in the acrylic cylinder, so that the visualization of filtering impurities in an inner cavity is realized, and the impurities or the filter element can be cleaned in time.

Description

Technical Field

[0001] The utility model relates to a visual vacuum filter and belongs to the technical field of vacuum static casting equipment. Background Art

[0002] During the vacuum casting process, the product must be poured in a vacuum environment. Because the casting material generates steam under vacuum and heating conditions, and because there are certain impurities (primarily dust) in the air, these impurities can be drawn into the vacuum pump through the pipeline during operation, causing damage. Therefore, a vacuum filter should be added between the vacuum pump and the evacuation valve to protect the vacuum pump and extend its service life. Traditionally, carbon steel vacuum filters with activated carbon have been used.

[0003] The disadvantages of this filter are: 1. The activated carbon needs to be replaced regularly, which is troublesome to disassemble and assemble. If it is not replaced in time, the vacuum pump will be damaged; 2. The original filter outer cylinder is made of Q235, and the working condition of the filter cannot be seen intuitively, and abnormal conditions are not easy to detect; 3. The all-metal structure is heavy and the cost is high. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a visual vacuum filter. The outer cylinder of the visual vacuum filter adopts a visible acrylic cylinder structure, and a filter core is arranged in the acrylic cylinder, so as to realize the visualization of impurities filtered in the inner cavity and timely clean the impurities or clean the filter core.

[0005] To solve the above problems, the specific technical solution of the utility model is as follows: a visual vacuum filter, characterized in that: corresponding limit platforms are provided on the opposite surfaces of the upper flange and the lower flange, the limit platforms of the upper flange and the lower flange are jointly sealed and connected to the acrylic tube, an air inlet and an air outlet are provided on the upper flange, a filter element is provided in the inner cavity of the acrylic tube, the top outlet of the filter element corresponds to the position of the air outlet, and is sealed with the lower surface of the upper flange; the air outlet is connected to the vacuum pump interface, and the air inlet is connected to the external equipment.

[0006] The outer peripheries of the upper flange and the lower flange are connected to a plurality of screw assemblies, and the screw assemblies press the upper flange and the lower flange onto the upper and lower end surfaces of the acrylic tube.

[0007] The upper surface of the upper flange is sealed and connected to the pump interface flange at the air outlet; a through hole is provided in the center of the pump interface flange, which serves as a connection interface for the vacuum pump; and the top of the filter element is sealed and connected below the through hole of the pump interface flange.

[0008] A U-shaped positioning seat is welded at the center of the lower surface of the pump interface flange. A threaded hole is provided in the center of the positioning seat. The fixing bolt is inserted from the bottom of the filter element. One end of the fixing bolt is threadedly connected to the threaded hole of the positioning seat, and the other end is sealed through the filter element and connected to the nut.

[0009] The diameter of the air outlet of the upper flange is larger than the outer diameter of the filter element. The top of the filter element passes through the air outlet and is in sealing contact with the pump interface flange through a sealing gasket.

[0010] Insert the equipment interface pipe into the air inlet of the upper flange, with the upper end of the equipment interface pipe higher than the upper surface of the upper flange and the lower end close to the upper flange.

[0011] The visual vacuum filter of the present application adopts the above structure and has the following advantages:

[0012] 1. The internal impurity filtration is highly visual and can be cleaned in time;

[0013] 2. The upper flange and the lower flange are connected by a screw assembly, so that the acrylic tube is pressed and sealed with the upper flange and the lower flange;

[0014] 3. A pump interface flange is set on the upper flange and sealed with the filter element. The filter element can be taken out and the inner cavity is easy to clean.

[0015] 4. The air inlet is connected to the equipment interface pipe to send the gas into the bottom of the inner cavity, increasing the contact area between the gas and the filter element and improving the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the outline drawing of the visual vacuum filter.

[0017] Figure 2 A top view of the visual vacuum filter.

[0018] Figure 3 for Figure 2 AA cross-sectional view. DETAILED DESCRIPTION

[0019] like Figures 1 to 3 As shown, a visual vacuum filter is provided with corresponding limit platforms on the opposing surfaces of the upper flange 4 and the lower flange 5. The limit platforms of the upper flange 4 and the lower flange 5 are jointly sealed and connected to the acrylic tube 3. To ensure the sealing effect of the acrylic tube 3, the outer periphery of the upper flange 4 and the lower flange 5 are jointly connected to a plurality of screw assemblies 7, which press the upper flange 4 and the lower flange 5 against the upper and lower end surfaces of the acrylic tube 3.

[0020] An air inlet 1 and an air outlet 2 are provided on the upper flange 4, and a filter element 6 is provided in the inner cavity of the acrylic tube 3. The top outlet of the filter element 6 corresponds to the position of the air outlet 2 and is sealed with the lower surface of the upper flange 4; in order to facilitate connection with the vacuum pump, a pump interface flange 8 is sealed and connected at the air outlet 2 on the upper surface of the upper flange 4; a through hole is provided in the center of the pump interface flange 8, which serves as a connection interface of the vacuum pump.

[0021] To ensure the sealing performance of the filter element 6, a U-shaped locating seat 9 is welded to the center of the lower surface of the pump interface flange 8. The center of the locating seat 9 has a threaded hole, and a fixing bolt 10 is inserted from the bottom of the filter element 6. One end of the fixing bolt 10 is threadedly connected to the threaded hole of the locating seat 9, and the other end is sealed through the filter element 6 and connected to a nut. At the same time, the diameter of the air outlet 2 of the upper flange 4 is larger than the outer diameter of the filter element 6. The top of the filter element 6 passes through the air outlet 2 and is sealed to the pump interface flange 8 via a sealing gasket 11.

[0022] The equipment interface pipe 12 is inserted into the air inlet 1 of the upper flange 4. The upper end of the equipment interface pipe 12 is higher than the upper surface of the upper flange 4, and the lower end is close to the upper flange 4, thereby improving the filtering efficiency.

[0023] When the visual vacuum filter is operating, air enters the inner cavity through the equipment interface pipe 12 and filters impurities through the filter element 6. The purified air enters the filter element and is discharged through the vacuum pump connection interface. When the visual vacuum filter is not operating, the accumulation of impurities inside can be seen. To clean it, remove the pump interface flange 8, and the filter element 6 extends directly from the air outlet of the upper flange 4. Acrylic impurities can be discharged through the upper air outlet 2 of the upper flange 4, making it convenient for cleaning and filter element cleaning and replacement.

Claims

1. A visual vacuum filter, characterized in that: A corresponding limiting platform is provided on the surfaces opposite to the upper flange (4) and the lower flange (5); the limiting platforms of the upper flange (4) and the lower flange (5) are jointly sealed and connected to the acrylic tube (3); an air inlet (1) and an air outlet (2) are provided on the upper flange (4); a filter element (6) is provided in the inner cavity of the acrylic tube (3); the top outlet of the filter element (6) corresponds to the position of the air outlet (2) and is sealed and connected to the lower surface of the upper flange (4); the air outlet (2) is connected to the interface of a vacuum pump, and the air inlet (1) is connected to an external device.

2. The visual vacuum filter according to claim 1, characterized in that: The outer peripheries of the upper flange (4) and the lower flange (5) are connected to a plurality of screw assemblies (7), and the screw assemblies (7) press the upper flange (4) and the lower flange (5) onto the upper and lower end surfaces of the acrylic tube (3).

3. The visual vacuum filter according to claim 1, characterized in that: The upper surface of the upper flange (4) is located at the air outlet (2) and is sealed and connected to the pump interface flange (8); a through hole is provided at the center of the pump interface flange (8), and the through hole serves as a connection interface for the vacuum pump; and the top of the filter element (6) is sealed and connected below the through hole of the pump interface flange (8).

4. The visual vacuum filter according to claim 3, characterized in that: A U-shaped positioning seat (9) is welded at the center of the lower surface of the pump interface flange (8). A threaded hole is provided at the center of the positioning seat (9). A fixing bolt (10) is inserted from the bottom of the filter element (6). One end of the fixing bolt (10) is threadedly connected to the threaded hole of the positioning seat (9), and the other end is sealed and passed through the filter element (6) and connected to a nut.

5. The visual vacuum filter according to claim 3, characterized in that: The diameter of the air outlet (2) of the upper flange (4) is larger than the outer diameter of the filter element (6), and the top of the filter element (6) passes through the air outlet (2) and is in sealing contact with the pump interface flange (8) via a sealing rubber gasket (11).

6. The visual vacuum filter according to claim 1, characterized in that: The equipment interface pipe (12) is inserted into the air inlet (1) of the upper flange (4), the upper end of the equipment interface pipe (12) is higher than the upper surface of the upper flange (4), and the lower end is close to the upper flange (4).

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