JPH0331382Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a sealing structure for the air chamber attachment/detachment part of an aerator.

Conventional technology and problems When lowering an aerator, which is used to blow compressed air into sewage water in sewage treatment, to the floor below, there is a method of sliding it down along the guide pipe. When the guide pipe and the air supply pipe that introduces compressed air into the pump part are used together, the aerator body is guided by the guide pipe fittings and slides down the guide pipe and is installed on the floor. Air is supplied from the blower only after the air port is connected to the air chamber of the aerator body, but dimensional errors in the manufacture of the guide tube, errors in the installation of the guide tube, and non-horizontal surfaces on which the aerator is installed must be avoided. The guide fittings need to have enough dimensional space to absorb it.

Therefore, the portion connecting the air supply port of the air supply pipe and the air chamber of the aerator main body needs to have a structure that can absorb this margin and have sealing properties. Furthermore, the structure must be such that the sealing performance of the air supply section can be maintained even when the aerator is installed at an angle due to the non-horizontal nature of the installation area of the aerator.

Means for solving the problems In this invention, in order to solve the above problems,
The outlet end of the air supply pipe section at the tip of the guide tube opens upward, and the aerator air chamber inlet section has a circular opening in the air chamber, a seal rubber having a hole with a diameter smaller than the guide tube outer diameter, and the seal rubber is pressed against the guide tube. and an air supply pipe guide fitting having a conical hole for guiding the outlet end of the air supply pipe at the tip of the air supply pipe.

Embodiment FIG. 1 is a partial cross-sectional view of an aerator device according to this invention that serves as both a guide pipe and an air supply pipe, and FIG. Slide it down onto the floor surface 10 along the guide tube 5 via the guide tube fitting 6. The guide tube 5 is also used as an introduction tube for air from the blower, and its tip is bent upward to become a tip air supply pipe section 4, and its opening is an air supply port 41. The air chamber 7 in the aerator main body has a circular opening 71 in the center, and is further fixed below the air chamber with a seal rubber 2 and an air supply pipe guide fitting 3. The seal rubber 2 has a central opening 21 having a smaller diameter than the outer diameter of the outlet end 42 of the air supply pipe section 4, and the opening is chamfered at the top and bottom as shown in the figure.
Furthermore, the air supply pipe guide fitting 3 has a slope portion 32 that expands downward. Note that 9 indicates an underwater motor.

To install the aerator, lower the aerator body 1 from above, and attach the air supply pipe guide fitting 3.
An outlet end 42 of the air supply pipe section 4 is guided to the lower slope 32 of the air supply pipe 4 , and the outlet end 42 coincides approximately with the center of the circular opening 71 of the air chamber 7 . The seal rubber 2 has a chamfered shape at the top and bottom at the periphery of the central opening 21, and since the central opening 21 has a smaller diameter than the outer diameter of the outlet end 42, there is a gap between the aerator 1 and the air supply pipe section 4. Airtightness is maintained.

The example shown in Fig. 1 is of the downward discharge type, and the arrow W
Water is sucked in from above as shown by arrow a, and compressed air from the blower passes through the guide tube as shown by arrow a, enters the air chamber 7 from the air supply port 41 of the air supply pipe section 4 at its tip, and enters the air chamber 7 from the air discharge port 72. It mixes with the water that has blown out and passed through the impeller 8, and the mixture of water and air is ejected from the discharge casing 81 as shown by the arrow aw.

FIG. 3 is a partial cross-sectional view of the application of this invention to a top discharge type aerator, similar to FIG. 1, and the same reference numerals as in FIG. 1 represent the same parts. In the case of the top discharge type, the air chamber 7 is formed on the outer periphery of the discharge casing 81, and an air supply pipe 75, which is a downwardly curved pipe, is attached to the air chamber 7. The invention shown in FIG. 2 is installed at the joint between the air supply pipe 75 (attached to the aerator main body 1 in the illustrated example) shown by A in the figure and the air supply pipe section 4 at the tip of the guide tube. This seal structure can be applied.

Effects The seal structure of the aerator of this invention has such a configuration, and the specially shaped air supply pipe guide fitting and seal rubber allow the outlet end of the air supply pipe section at the tip of the guide pipe to be sealed when the aerator is installed on the floor. Regardless of the misalignment between the center and the air chamber opening of the aerator and the non-horizontality of the installation floor, the air supplied from the blower can be sealed without leakage at the attachable/detachable part.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional view of a bottom discharge aerator to which this invention is applied, Figure 2 is a detailed view of the attachment/detachment part, and Figure 3 is a partial cross-section of a top discharge aerator. . Explanation of symbols, 1... Aerator body, 2... Seal rubber, 3... Air supply pipe guide fitting, 4... Air supply pipe section, 5... Guide pipe, 6... Guide pipe fitting, 7
... Air chamber, 8 ... Impeller, 9 ... Submersible motor, 10 ... Floor surface, 11 ... Hanging fittings, 21 ...
Central opening, 32...Slope portion, 41...Air supply port, 4
2...Exit end, 71...Circular opening, 72...Air discharge port, 75...Air supply pipe, 81...Discharge casing.

Claims (1)

[Scope of utility model registration request] In an aerator that is guided by two guide tubes, the guide tubes and the air chamber are removable underwater, and the tips of the guide tubes also serve as the air supply tube, the outlet end of the air supply tube at the tip of the guide tubes is directed upward. The inlet of the aerator air chamber has a circular opening, a seal rubber having a hole with a diameter smaller than the outside diameter of the guide tube, and a conical cone that holds the seal rubber and guides the outlet end of the air supply pipe at the tip of the guide tube. An air chamber removable seal structure characterized by being formed from an air supply pipe guide fitting having a shaped hole.