Water return prevention device for air inlet of water-ring vacuum pump

Abstract

The utility model discloses a water ring type vacuum pump air inlet water return prevention device which comprises an air conveying pipeline, the upper end and the lower end of the air conveying pipeline are connected with an upper flange assembly and a lower flange assembly respectively, an upper air conveying hole is formed in the middle of the upper flange assembly, and a lower air conveying hole is formed in the middle of the lower flange assembly. The middle of the upper end face of the lower flange assembly is connected with a cylindrical supporting piece, the top of the supporting piece is connected with an umbrella-shaped upper cover, at least one vent hole is formed in the side wall of the supporting piece, the supporting piece and the lower air conveying hole are concentrically arranged, and the lower flange assembly is connected with the umbrella-shaped upper cover. The diameter of an inner cavity of the supporting piece is not smaller than the hole diameter of the lower air conveying hole. The water ring type vacuum pump is simple in structure and easy to machine, can effectively solve the problem of water backflushing of the air inlet of the water ring type vacuum pump, is easy to maintain and disassemble as the air inlet and the air outlet are provided with flange connectors, and improves the installation and maintenance efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of preventing backflow of water at the air inlet of a water-ring vacuum pump. Specifically, it relates to a device for preventing backflow of water at the air inlet of a water-ring vacuum pump. Background Technique

[0002] At present, a vacuum solenoid valve is installed at the air inlet of a medical water-ring vacuum pump. The water-ring vacuum pump uses water for sealing during operation. When the vacuum pump stops running, due to inertia, part of the sealing water will backflush upward through the air inlet into the pipeline. When the position of the installed vacuum solenoid valve is relatively close to the air inlet of the vacuum pump, the upward-backflushing water will enter the vacuum solenoid valve, thus damaging the vacuum solenoid valve. And in order to reduce the occurrence of this situation, some deliberately install the vacuum solenoid valve far away from the vacuum pump, which not only wastes pipelines but also looks unsightly. Content of the Utility Model

[0003] In view of the above technical problems in the related art, the utility model provides a device for preventing backflow of water at the air inlet of a water-ring vacuum pump, which can solve the above problems.

[0004] To achieve the above technical purpose, the technical solution of the utility model is realized as follows:

[0005] A device for preventing backflow of water at the air inlet of a water-ring vacuum pump includes an air delivery pipeline. The upper and lower ends of the air delivery pipeline are respectively connected with an upper flange assembly and a lower flange assembly. An upper air delivery hole is opened in the middle of the upper flange assembly, and a lower air delivery hole is opened in the middle of the lower flange assembly. A cylindrical support member is connected to the middle of the upper end surface of the lower flange assembly. The top of the support member is connected with an umbrella-shaped upper cover. At least one ventilation hole is opened on the side wall of the support member. The support member is concentric with the lower air delivery hole, and the inner cavity diameter of the support member is not less than the hole diameter of the lower air delivery hole.

[0006] Further, the upper flange assembly includes a flange two connected to the top of the air delivery pipeline. The flange two is connected to a flange one through a bolt assembly one, and a sealing gasket one is arranged between the flange one and the flange two. The lower flange assembly includes a flange three connected to the bottom of the air delivery pipeline. The flange three is connected to a flange four through a bolt assembly two, and a sealing gasket two is arranged between the flange three and the flange four.

[0007] Further, the flange one, the flange two, the flange three, and the flange four are all stainless steel flanges, and the air delivery pipeline is a stainless steel pipe.

[0008] Further, the inner space of the umbrella-shaped upper cover is a frustum structure.

[0009] Advantages of the present utility model: The structure of this application is simple and easy to process, which can effectively solve the problem of backwashing water at the air inlet of the water-ring vacuum pump. Moreover, flange interfaces are designed at the air inlet and outlet, which are easy to maintain, disassemble and assemble, improving the installation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] The following further details the present utility model with reference to the drawings.

[0012] Figure 1 is the front view of an anti-backwater device for the air inlet of a water-ring vacuum pump according to an embodiment of the present utility model;

[0013] Figure 2 is Figure 1 the sectional view taken along A-A in

[0014] In the figure:

[0015] 1. Flange 1; 2. Sealing gasket 1; 3. Flange 2; 4. Gas transmission pipeline; 5. Umbrella-shaped upper cover; 6. Vent hole; 7. Flange 3; 8. Sealing gasket 2; 9. Flange 4; 10. Bolt assembly 2; 11. Upper gas transmission hole; 12. Lower gas transmission hole; 13. Support member; 14. Bolt assembly 1. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0017] Such as Figure 1-2As shown in the figure, a water ring vacuum pump air inlet anti-water reverse device is disclosed according to the present utility model, which includes an air delivery pipeline 4. The upper and lower ends of the air delivery pipeline 4 are respectively connected with an upper flange assembly and a lower flange assembly. An upper air delivery hole 11 is provided in the middle of the upper flange assembly, and a lower air delivery hole 12 is provided in the middle of the lower flange assembly. A cylindrical support member 13 is connected to the middle of the upper end surface of the lower flange assembly. An umbrella-shaped upper cover 5 is connected to the top of the support member 13. At least one ventilation hole 6 is provided on the side wall of the support member 13. The support member 13 is concentrically arranged with the lower air delivery hole 12, and the inner cavity diameter of the support member 13 is not less than the hole diameter of the lower air delivery hole 12.

[0018] Embodiment 1:

[0019] When the medical water ring vacuum pump is working normally, the air flow enters the air delivery pipeline 4 through the upper air delivery hole 11 of the upper flange assembly, then enters the inner cavity of the support member 13 through the ventilation hole 6 (bar-shaped structure), and then is input into the lower air delivery hole 12 and enters the device below the lower flange assembly, and finally is discharged out of the pump through the pump body. When the vacuum pump stops, the water that rebounds upward due to inertia, after passing through the lower air delivery hole 12, will be blocked by the umbrella-shaped upper cover 5 and fall back from the lower air delivery hole 12, and will not continue to rebound upward, thus preventing water from entering the vacuum solenoid valve. At the same time, both the upper flange assembly and the lower flange assembly are flange structures connected by bolt assemblies (including bolts and nuts), which are convenient for disassembly and installation, thus facilitating the installation and maintenance of the support member 13 and the umbrella-shaped upper cover 5.

[0020] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A water-ring vacuum pump air inlet anti-backflow device, characterized in that, It includes a gas transmission pipeline (4). Upper and lower flange assemblies are respectively connected to the upper and lower ends of the gas transmission pipeline (4). An upper gas transmission hole (11) is formed in the middle of the upper flange assembly, and a lower gas transmission hole (12) is formed in the middle of the lower flange assembly. A cylindrical support member (13) is connected to the middle of the upper end face of the lower flange assembly. An umbrella-shaped upper cover (5) is connected to the top of the support member (13). At least one ventilation hole (6) is formed in the side wall of the support member (13). The support member (13) is concentric with the lower gas transmission hole (12), and the inner cavity diameter of the support member (13) is not less than the hole diameter of the lower gas transmission hole (12).

2. The anti-backflow water device for the air inlet of a water-ring vacuum pump according to claim 1, characterized in that, The upper flange assembly includes a flange two (3) connected to the top of the gas transmission pipeline (4). The flange two (3) is connected to a flange one (1) through a bolt assembly one (14). A gasket one (2) is provided between the flange one (1) and the flange two (3); the lower flange assembly includes a flange three (7) connected to the bottom of the gas transmission pipeline (4). The flange three (7) is connected to a flange four (9) through a bolt assembly two (10). A gasket two (8) is provided between the flange three (7) and the flange four (9).

3. The anti-backflow water device for the air inlet of a water-ring vacuum pump according to claim 2, characterized in that, The flange one (1), the flange two (3), the flange three (7), and the flange four (9) are all stainless steel flanges, and the gas transmission pipeline (4) is a stainless steel pipe.

4. The anti-backflow water device for the air inlet of a water-ring vacuum pump according to claim 2, characterized in that, The inner space of the umbrella-shaped upper cover (5) is a frustum structure.

Images