JPH04114497U - Aeration device - Google Patents

Abstract

(57) [Summary] [Purpose] To constantly supply fresh air and to easily maintain and manage the ventilation control valve and operating device. [Structure] A hollow shaft 2 having a screw 3 at the lower end is connected to a hollow motor shaft 11, and an intake pipe 4 is connected to the anti-load side of the motor shaft via a rotary pipe joint 8. The intake pipe is extended to the atmosphere, and is provided with a ventilation control valve and an actuator for the ventilation control valve.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention provides a constant supply of fresh air and allows maintenance of the ventilation control valve and actuating device. This relates to an aeration device that is easy to operate.

0002

[Conventional technology]

It has a screw driven by a motor, and the rotation of this screw causes the liquid to flow In addition to agitating the Self-priming aerators that use pressure to suck in air and supply air into the liquid have a You can adjust the rotation of the motor shaft, or even stop the intake air to perform anaerobic operation. An electric valve for ventilation control is provided on the load side. This known aerator is shown in Figure 3. .

0003

[Problem that the idea aims to solve]

However, in conventional aerators, as shown in Figure 3, the electric valve for aeration control is operated by the motor. Since it has a direct connection structure at the loading side position, a cover is installed on top of the aerator to create an airtight atmosphere. If you are exposed to air, you cannot breathe in fresh air. Also this ventilation control Under environmental conditions such as high humidity or high concentration of corrosive gas, the motorized valve seal may be damaged. If this is insufficient, the contacts of internal microswitches, etc. may short-circuit, or conductivity may occur. However, it may not be able to operate normally, and therefore proper aeration operation may not be possible.

0004 This invention is suitable for use when the aerator is installed under environmental conditions such as high humidity and highly concentrated corrosive gas. The purpose is to constantly supply fresh air and properly control the amount of ventilation, even when .

[0005]

[Means to solve the problem]

This invention was made to achieve the above object, and a screwdriver is attached to the hollow motor shaft. Connect a hollow shaft with a threaded screw at the lower end, and also connect a rotary pipe to the opposite load side of this motor shaft. Connect the intake pipe by hand, extend the intake pipe to the atmosphere, and The gist is that this is provided with a ventilation control valve and an actuation device for this ventilation control valve. .

[0006]

[Effect]

Connect the intake pipe to the anti-load side of the motor shaft, which is connected to a hollow shaft with a screw at the bottom end. Next, extend this intake pipe and separate the ventilation control valve and its operating device from the aerator. , installed under atmospheric conditions. This ensures that regardless of the environmental conditions in which the aerator is installed It is possible to constantly supply fresh air, and there is no problem with the ventilation control valve or actuating device. This eliminates problems and facilitates maintenance and management.

[0007]

【Example】

The present invention will be explained below based on the illustrated embodiments. Screw type self-priming device A used in the treatment of sewage such as sewage and industrial wastewater As shown in FIGS. 1 and 2, the motor 1 and the hollow motor shaft 11 of the motor 1 are A hollow shaft 2 of the required length that is directly connected, a screw 3 provided at the tip of the hollow shaft 2, and a motor. An intake pipe 4 provided on the opposite load side of the shaft 11, an electric valve 5 for controlling the amount of ventilation, and an actuating device. It consists of 7.

[0008] The hollow shaft 2 has the required length and strength, and the aeration device A is connected to an aeration tank or a waterway. When the sewage is placed at the required infiltration angle with respect to the water surface, Determine the length appropriately so that it reaches the specified depth, and attach a screw 3 at the tip. to be fixed.

[0009] A motor shaft 11 of a motor 1 is connected to the base end side of the hollow shaft 2 via a shaft coupling 6. The screw 3 is rotated through the hollow shaft 2 by the drive of the motor 1, and the screw 3 is rotated through the hollow shaft 2. Negative pressure is generated in the water area at the tip of the clew, and using this negative pressure, the hollow motor shaft 1 1. Air is supplied as fine bubbles through the hollow shaft 2 into the water area at the tip of the screw. Eggplant. In this case, although not shown, the motor 1 is provided with an electric control circuit, and the motor By controlling the rotation speed of the screw, the rotation speed of the screw can be adjusted and aeration and stirring can be performed. Sometimes it can be adjusted.

0010 The motor shaft 11 rotates on the casing 12 of the motor 1 via bearings 13, 13. In addition to being freely supported, the intake pipe 4 is connected to this casing 12 via a rotary joint 8. At the same time, an electric valve 5 equipped with an actuating device 7 is provided at the tip of this intake pipe. child This allows you to open and close the vents to adjust the amount of ventilation. This electric valve 5 was set last time. The ventilation amount is set to the same level as that during aerobic operation, and can be adjusted according to the load. It should be fully open or close to fully closed. The intake pipe 4 is extended from the installation position of the aeration device A as shown in Fig. 1, and is closed with a cover 9. When the tube 4 is sealed, the tube 4 should protrude outside the lid, that is, into the atmosphere. The electric valve is provided at the tip as described above.

[0011] Therefore, in the device configured as described above, the motor 1 drives the When the screw 3 at the tip of the hollow shaft 2 is submerged in water, the propulsive force of the screw generates electricity. It is connected to the non-output shaft side of the hollow shaft of the motor, which is directly connected to the hollow shaft. It sucks in fresh air from the intake pipe 4 in the atmospheric atmosphere and sends it out into the water. The amount of air is adjusted by opening and closing an electric valve 5 provided at the tip of the intake pipe. At this time, the amount of aeration can be adjusted by adjusting the time schedule of opening and closing times. It can be arranged.

0012

[Effect of the idea]

When using this invention, the intake pipe connected to the anti-load side of the aerator is extended to the atmospheric atmosphere. Because the aerator is equipped with an electric valve and its operating device, the aerator is subject to high humidity and high concentration It can be installed and used in environments such as under gas, and can always breathe fresh air under the atmosphere. Air and wastewater can be supplied to achieve effective aeration. Also, the maintenance pipe of the electric valve It has the advantage of being easy to maintain and reducing the number of failures.

[Brief explanation of drawings]

FIG. 1 is a front view of the aeration device of the present invention.

FIG. 2 is an enlarged sectional view of main parts.

FIG. 3 is an explanatory diagram of a known example.

[Explanation of symbols]

A Aeration device 1 motor 11 Motor shaft 2 Hollow shaft 3 screw 4 Intake pipe 5 Electric valve 7 Actuation device

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Kazutaka Fukumoto Hitachi, 3-11-1 Shimosakabe, Amagasaki City, Hyogo Prefecture Within Kiden Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] Claim 1: A hollow shaft with a screw provided at the lower end is connected to a hollow motor shaft, and an intake pipe is connected to the anti-load side of the motor shaft via a rotary pipe joint. An aeration device that extends to the atmosphere and is provided with a ventilation control valve and an actuator for the ventilation control valve.