JPS621306Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drive device for a dust remover.

At sewage treatment plants, etc., garbage, etc. (hereinafter referred to as screen waste) flowing down in the flowing water is captured by screens installed to prevent water from flowing into waterways, and the garbage is transported along the screen. A dust remover is installed that uses a rake to scrape up and discharge the dust. Conventionally, in this type of dust remover, the sprocket wheels or one side facing each other at the top and bottom of the screen are used as a guide chain, and a chain with rakes protruding at a constant pitch is stretched between the upper and lower wheels, and this chain is accurately controlled. One or two sprocket wheels meshed with the chain are driven by a three-phase induction motor via a reduction gear and a transmission mechanism, and the rake is driven at a constant speed. In order to operate this rake at a predetermined speed, it requires a speed reducer, etc., and maintenance and inspection of these equipment is necessary.As the rake operation is constant, the equipment is designed to accommodate the maximum amount of waste on the running water screen. Since the capacity is determined, there is a drawback that over-designing results in the equipment becoming larger and more expensive.

In view of this, the present invention eliminates the need for a speed reducer and transmission mechanism, thereby making it possible to easily and variably adjust the rake operating speed according to the amount of inflowing screen waste, and to achieve maintenance-free operation.

The present invention will be explained below according to the illustrated embodiments.

In the figure, numeral 1 denotes a screen installed to block a waterway in a sewage treatment plant, etc., and the lower part of the waterway is omitted in the illustration. Further, a main body frame 2 of the dust remover is provided along this screen 1, and an apron 3 is attached to the main body frame 2 at a position above the screen and as an extension of the screen, and one or two or more aprons are attached to the upper end of this apron 3. Sprocket wheels 4 and 5 are provided respectively, and a sprocket wheel or a chain guide (not shown) is arranged below the screen, and an endless chain 6 is stretched between the upper and lower wheels. This chain 6
Usually, rakes 7 are installed oppositely on both sides of the screen, and rakes 7 are installed between these two chains at required pitches in the longitudinal direction of the chains. The waste is discharged to a discharge conveyor or the like 8 installed in a waterway or above the pond. In addition, a chain guide rail 9 may be arranged between the upper and lower wheels or at an arbitrary position, and the chain or rake may be regulated to travel along a travel trajectory along a predetermined screen.

The above-mentioned rake drive system employs a direct drive method using a linear motor.As shown in the drawing, this is an endless chain with a protruding rake, and a reaction plate (movable) is attached to the link plate of the chain. The main idea is to provide a coil (stator) at a fixed pitch on the main body frame side, and to directly transmit and drive the linear thrust of this coil to the main chain.

Next, the drive device 10 will be explained.

A reaction plate 11 is provided protruding from the link plate of the chain 6, and this is provided so that when the endless chain is stretched between the upper and lower sprocket wheels, both the outward and return paths of the chain are inside the chain. 11 is protruded at a fixed pitch so as to directly receive the linear thrust of the coil without interfering with the operation of the chain. In addition, the coil 12 is fixed to a mounting base 13 protruding from the main body frame 2, but in this case, the coil generates a linear thrust and an attractive force toward the coil, so the gap between the reaction plate and the coil must be adjusted with precision. Must be held well and accurately. In addition, in order to balance the suction force, the reaction plate is placed in the middle, so the coils are placed facing each other and fixed with a mounting base from the main body frame. Also, in order to prevent the reaction plate from shifting to the left or right, the main body chain side is guided by a guide rail and guide roller, and at the same time, the reaction plate's guide roller 14 is used on the opposite side so that the reaction plate enters the center between the opposing coils from the main body frame. Provide the required number of at the coil mounting part. Further, these coils are provided in each of the two chains, and the number of coils is determined according to the required tension of the main chain.

Since the present invention is constructed as described above, the linear thrust of the coil is directly transmitted to the chain equipped with a rake via the reaction plate, so there is no need for a reduction gear etc. There is no power loss due to mechanical efficiency, and the speed of the coil can be freely adjusted, for example, by voltage control, so the rake operating speed can be set according to the amount of incoming screen debris, and since there is no reducer or transmission mechanism, maintenance and inspection of the reducer etc. This has advantages such as eliminating the need for

[Brief explanation of the drawing]

1 is a schematic front view of the dust remover, FIG. 2 is a sectional view of the linear motor section, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a front view of FIG. 3. 1...Screen, 2...Body frame, 3...
... Apron, 4, 5... Sprocket wheel,
6... Chain, 7... Rake, 8... Discharge conveyor, 9... Chain guide rail, 10... Drive device, 11... Reaction plate, 12... Coil, 13... Mounting stand.

Claims (1)

[Scope of utility model registration request] In a dust collector in which a rake is moved along a screen to remove screen residue captured by the screen, a reaction plate is protrudingly attached to the link plate of an endless chain equipped with a rake, and a plurality of coils are arranged on the main frame of the dust collector so as to face the reaction plate and directly transmit the linear thrust of the coils.