JP2978465B2 - Silo blade drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade driving device for a silo provided with rotating blades for discharging contents.

[0002]

2. Description of the Related Art For example, a sewage sludge dewatered cake generated from a sewage treatment plant is stored in a hopper before being sent to a process such as incineration or melting, and is cut out from the bottom thereof by a predetermined amount. Conventionally, a screw feeder has been used for cutting out from such a hopper, but a large number of screw feeders are required to cut out the contents uniformly from the entire bottom surface of the hopper. For this reason, silos have been developed in which a hopper is formed in a cylindrical silo shape and rotating blades provided inside the hopper are rotated so that uniform contents can be cut out from the entire bottom surface.

However, in order to drive the rotating blades inside a highly viscous sewage sludge dewatering cake or the like, it is necessary to attach a large and powerful reducer or motor to the blade main shaft, which greatly increases the equipment cost. There was a problem. Also,
Since such a rotating blade is rotated at a position close to the bottom plate of the silo, a sewage sludge dewatering cake or the like may bite between the rotating blade and the bottom plate of the silo. There is a problem that it takes a lot of trouble for.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems and can drive the rotating blades without the need for a large reduction gear or a motor. Another object of the present invention is to provide a silo blade drive device having a simple structure capable of easily solving a trouble.

[0005]

Means for Solving the Problems] The present invention has been made in order to solve the aforementioned problem, the bottom plate of the silo to the upper end of the blade main shaft to penetrate downward, or the discharge hole of the bottom plate of the silo contents
Attach rotating blades to cut out evenly from
A large-diameter gear or sprocket is attached to the lower end of the blade main shaft, and a drive shaft equipped with a small-diameter gear or sprocket for driving this gear or sprocket is provided at the lower part of the silo.
The drive shaft is continuously rotated by a reversible hydraulic motor.

According to the silo blade driving device of the present invention,
A drive shaft having a small-diameter gear or sprocket is driven by a small-sized and high-torque hydraulic motor to rotate a blade main shaft having a large-diameter gear or sprocket. The rotating blades can be driven without requiring a motor or a motor. Further, since the driving source is a single hydraulic motor, the structure is simple and the equipment cost is low. Further, the hydraulic motor can easily reverse rotation, is resistant to sudden acceleration and sudden deceleration, and can change the rotation speed in a stepless manner, so that even if a biting trouble occurs, the trouble can be easily resolved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view, and FIG. 2 is a longitudinal sectional view. In these figures, 1 is a cylindrical silo for storing sewage sludge dewatering cake and the like, 2 is a bottom plate thereof, and 3 is a bearing attached to the bottom plate 2. A blade main shaft 4 that penetrates the bottom plate 2 is supported by the bearing 3, and a rotating blade 5 is fixed to an upper end thereof. The rotating blades 5 rotate in a certain direction to uniformly cut out contents such as sewage sludge dewatered cake stored in the silo 1 from the discharge holes 6 of the bottom plate 2.

A large-diameter gear 7 or a sprocket is fixed to the lower end of the blade main shaft 4. Although the gear 7 is used in this embodiment, it may be replaced with a sprocket. A drive shaft 9 having a small-diameter gear 8 or a sprocket is provided vertically below the blade main shaft 4 of the silo 1 at a position outside the blade main shaft 4. The drive shaft 9 is supported by a bearing 10, and the small-diameter gear 8 of the drive shaft 9 meshes with the large-diameter gear 7 of the blade main shaft 4. The terms large diameter and small diameter used herein are relative and do not imply absolute size. However, it is preferable that the large-diameter gear 7 has a diameter equal to or more than 1/3 of the diameter of the rotary blade 5.

A hydraulic motor 10 is mounted on the drive shaft 9. The hydraulic motor 10 is a type of hydraulic actuator driven by hydraulic pressure, and means a type that converts hydraulic pressure into continuous rotary motion. In general, the hydraulic motor 10 has advantages such as a large output per volume and weight, strong resistance to sudden acceleration and sudden deceleration, easy switching of the rotation direction, and the ability to change the rotation speed steplessly. As the hydraulic motor 10, a gear motor, a vane motor, a piston motor, or the like can be used. The gear motor and the vane motor have the advantage of simple structure, and the piston motor has the advantage of high efficiency and easy to obtain large output. Therefore, an appropriate type of hydraulic motor 10 can be used according to the size of the silo 1 and the characteristics of the contents. It is preferable to select

When hydraulic pressure is supplied to the hydraulic motor 10 from a hydraulic pressure generating unit, the hydraulic motor 10 rotates the drive shaft 9 strongly, and the small-diameter gear 8 or the sprocket of the drive shaft 9 is driven by the large-diameter gear of the blade main shaft 4. 7 or a sprocket to rotate the rotary blade 5 continuously in a certain direction. As a result, the contents such as the sewage sludge dewatered cake inside the silo 1 are evenly cut out from the discharge holes 6 of the bottom plate 2.

As described above, the apparatus of the present invention can rotate the blade main shaft 4 with a large torque with a simple structure using a single hydraulic motor 10, and requires a conventional large reduction gear and motor. And not. In addition, when the contents such as the sewage sludge dewatered cake are caught on the lower surface of the rotating blade 5, the rotating blade 5 can be easily reversely rotated by switching the rotation direction of the hydraulic motor 10, and Can easily be solved.

[0012]

As described above, according to the silo blade driving device of the present invention, a simple mechanism using a single hydraulic motor without the need for a conventional large reduction gear or motor is required. rotary blade can be rotated at a large torque using a uniform content from the discharge hole of the bottom plate of the silo
As possible out be cut in. Also, in the event that there is a problem with the rotating blade getting stuck, the hydraulic motor can be rotated in reverse.
There are advantages such that troubles can be more easily eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention.

[Explanation of symbols]

1 silo, 2 bottom plate, 3 bearings, 4 blade spindles, 5
Rotating blades, 6 discharge holes, 7 large-diameter gear or sprocket, 8 small-diameter gear or sprocket, 9 drive shaft, 1
0 Hydraulic motor

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65G 65/30-65/48 B65D 88/68

Claims (1)

(57) [Claims] The upper end of the 1. A blade main shaft is through the bottom plate of the silo downward, uniformly the contents from the discharge hole of the bottom plate of the silo
Attach rotating blades for cutting, and blade main shaft
Attaching the large-diameter gear or sprocket to the lower end of the drive shaft having a small diameter gear or sprocket for driving the gear or sprocket provided at a lower portion of the silo, it is continuously rotated by reversible hydraulic motor drive shaft A silo blade drive device characterized in that: