JPS6351760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aeration device used for purifying wastewater.

For aeration equipment that is driven by a conventional submersible motor with a vertical shaft (with the output shaft end at the bottom) or an underwater geared motor (hereinafter referred to as submersible motor, etc.), once the submersible motor etc. is attached to the aerator casing, , install the impeller from below the casing, or attach a mounting bracket with a diameter larger than the outer diameter of the impeller to the flange of the mechanical seal casing connected to the submersible motor, etc. to aerate the impeller attached to the submersible motor, etc. It was attached to the device casing.

That is, the impeller outer diameter is the motor casing,
Because it is larger than the non-rotating parts of the motor side such as the gear casing and the mechanical seal casing connected to it, the impeller cannot pass through the mounting flange of the aerator casing after the impeller is attached to the submersible motor etc. For this reason, as shown in FIG. 2, the aerator casing is divided into upper and lower halves, and before attaching the lower casing 6B, an impeller 5 is attached to the shaft end of a submersible motor etc. attached to the upper casing 6A. Then lower casing 6B
As shown in Fig. 1, a mounting bracket 10 having a diameter larger than the outer diameter of the impeller 5 is attached to the flange 4a etc. of the mechanical seal casing 4 connected to the underwater motor 1 etc. , a submersible motor 1 or the like with an impeller 5 attached thereto was attached to the outer flange 6b of the aerator casing 6.

For this reason, these structures have a large number of parts;
Therefore, a large number of machined parts were required, which caused manufacturing problems. In addition, a mechanical seal 3 is generally used as a shaft seal for this type of underwater motor, etc., but since the spring of the mechanical seal 3 is held down by attaching an impeller 5, the conventional two-piece casing structure is not suitable. If you install only the mechanical seal 3 before installing the impeller 5, and then install the impeller 5 under the shaft, the mechanical seal 3 will fall, so after installing the underwater motor 1 etc. on the upper casing 6A, install the mechanical seal 3. 3 and the impeller 5 must be installed at the same time. It is difficult to carry out the work by placing it on the shaft because the underwater motor etc. are attached to the large casing. There was a problem above.

In the present invention, a fixed part for attaching a non-rotating part on the motor side is directly or indirectly formed in the aeration casing,
The fixed part is sized to allow the impeller to pass through it.

When mounting directly on the aeration casing, a part of the mounting flange is cut out, and when mounting indirectly, a rib-shaped support is provided, but the fixed part is the mounting flange itself or the rib-shaped support, allowing the impeller to pass through. It's becoming like that.

Embodiments of the present invention will be described below with reference to the drawings. 3 to 5, a mechanical seal 3 and an impeller 5 are attached to the shaft end of an underwater geared motor 1, and these are integrally attached to a mounting flange 6a of an aerator casing 6. Attach the flange 4a of the seal casing 4. At this time, since the outer diameter of the impeller 5 is larger than the inner diameter of the mounting flange 6a of the aerator casing 6, the impeller 5 is attached to the mounting flange 6a as shown in FIGS. 4 and 5 so that the impeller 5 can pass through. Notches 7 having a circumferential width larger than the circumferential width of the blades are provided for the number of blades. This allows the underwater geared motor 1, the mechanical seal 3, and the impeller 5 to be attached to and removed from the aerator casing 6 in an integrally assembled state.

In addition, in FIG. 3, 11 is an aeration pipe, and 12 is an air supply pipe connected to the aeration pipe 11, which is connected to a supply source of pure oxygen, air, etc. outside the aeration tank. 13 is an oil filler port of a mechanical seal.

Similar to the conventional example, the processing liquid is supplied to the aerator casing 6.
Gases such as pure oxygen and air are sucked in from above and flowed downward by the rotation of the impeller 5, and gases such as pure oxygen and air are supplied from the diffuser pipe 11, mixed with the processing liquid at the nozzle section between here and the discharge port, and then discharged. be done. Diffuser pipe 11
is connected to the air supply pipe 12, and pure oxygen outside the aeration tank,
Connected to a supply source such as air.

6 and 7 show another embodiment of the invention, in which all the mounting flanges are removed and a rib-like support 8 is attached to that part, which allows the gear casing 2 to The connected non-rotating parts of the mechanical seal casing 4 and the like on the motor side are attached to the aerator casing 6.

8 and 9 show still another embodiment of the present invention, in which a part of the mounting flange 6a is cut out 9. FIG. The manner of attachment of the non-rotating portion on the motor side is carried out in the same manner as in each of the above embodiments.

As described above, in the present invention, the notch is cut out to a size that allows the impeller to pass through, and the non-rotating part is attached to the fixed part, which is the mounting flange or rib-shaped support. Since the impeller can be attached to and removed from the aerator casing while being assembled as one, the following excellent effects are achieved.

○B With the conventional two-part casing structure, it is difficult to install a submersible motor etc. on the upper casing and then place it horizontally or on the shaft because the casing is large. However, the work required to install the impeller was extremely difficult. However, in the present invention, it becomes possible to place the underwater motor horizontally or on an axis and attach the mechanical seal and impeller before attaching the underwater motor etc. to the casing, thereby significantly improving work efficiency.

○B Split the aeration equipment casing into upper and lower halves,
It is no longer necessary to use parts such as mounting brackets with a diameter larger than the impeller outer diameter between the aerator casing and the flange of the mechanical seal casing, reducing the number of parts and machining parts, making it extremely easy to manufacture. It will be advantageous.

○C Since the underwater motor, etc., mechanical seal, and impeller can be easily removed as one unit, inspection of the mechanical seal and impeller becomes extremely easy.

○D Conventionally, it was not easy to supply oil to a mechanical seal because the entire assembly had to be assembled, and the oil filler port went inside the casing. However, in the present invention, the underwater motor, etc., mechanical seal, and impeller can be supplied externally. This will be possible when assembled,
Lubricating mechanical seals becomes extremely easy.

[Brief explanation of drawings]

FIGS. 1 and 2 are front views showing a part of a conventional aeration device in cross section. FIG. 3 is a front view showing a section of a part of the aeration device according to the embodiment of the present invention.
4 to 9 show aerator casings used in embodiments of the present invention, and FIGS.
The figure is a longitudinal sectional view, and FIGS. 5, 7, and 9 are plan views. DESCRIPTION OF SYMBOLS 1... Underwater geared motor, 2... Gear casing, 3... Mechanical seal, 4... Mechanical seal casing, 4a... Its flange, 5... Impeller, 6... Aerator casing, 6a... Its mounting flange, 7... Notch, 8 ...Rib-shaped support, 9...Notch in mounting flange.

Claims (1)

[Claims] 1 An impeller is attached to the shaft end of a submersible motor or submersible geared motor under the vertical shaft, and the non-rotating parts of the motor side, such as the motor casing, gear casing, and mechanical seal casing connected to these, are directly or indirectly connected to the aeration device casing. An aeration device, characterized in that a fixed part for attaching a non-rotating part on the motor side is directly or indirectly formed on the aeration casing, and the fixed part has a size that allows an impeller to pass through.