JPH08199674A - Crushing device for impurities in sewage - Google Patents

Abstract

PURPOSE: To prevent impurities from entwining on a screen, collect the impurities in a crusher provided side by side with the screen so as to finely crush, and disperse them in water, by installing a bar screen obliquely against the water flow of a water passage, and sliding it back and forth. CONSTITUTION: A screen device S is fitted to a machine frame 4 so that the plane of a screen 2 intersects obliquely the water flow direction of a water passage W, and a two-shaft rotor type crusher 1 is provided side by side with the machine frame 4 on one side of the screen device S. The screen 2 is formed by building in a screen frame 3 a bar screen having a mesh in the horizontal direction being apt to lead impurities to a crusher 1, and slidably held only back and forth by a screen slide driving part M. A crankshaft 7 is rotated by a motor for sliding, a transmission link 8 is slided by the stroke of two times the eccentric quantity (e) of a crankpin, and the water flow is let pulsate, so that the impurities in water does not entwine on the face of the screen 2, led to the crusher 1 so as to be crushed, and discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention guides contaminants such as empty cans, plastic containers, and wood chips flowing into sewage to a crusher through a screen device installed in the sewage, The present invention relates to an apparatus for collecting and crushing contaminants in sewage, which crushes finely in water with a crusher to prevent damage such as damage to pumps and dehydrators and clogging.

[0002]

2. Description of the Related Art If contaminants such as empty cans, plastic containers, and wood chips flow into a sewage treatment facility together with sewage, it may cause an accident such as clogging or damage to the piping of the facility or the pump.
A crusher is installed to prevent such accidents. Further, if the width of the water channel becomes wide, a plurality of crushers are required, which increases the cost, and therefore the device shown in FIG. 5 has been developed. The device is a rotating belt type screen device S in the sewer.
'And the crusher 1 are combined, and the contaminants in the sewage are carried into the crusher 1 by a rotating belt screen, finely crushed by the crusher and dispersed in the sewage.

The above conventional apparatus has the following problems. (1) Since the screen portion is made of a flexible material such as polyethylene nylon due to the rotational movement of the screen, the screen portion cannot be made solid and is easily damaged, resulting in poor durability. (2) Since the screen is a rotating belt type, the screen is doubled to increase water flow resistance and prevent passage of sewage. (3) Since the screen has a mesh-like belt surface, the irregularities make it easy for foreign matters to get entangled, and once tangled, it is difficult to loosen it.

[0004]

Therefore, the present invention solves the problems of the prior art, improves the durability of the screen, reduces the water flow resistance to improve the passage of sewage, and allows contaminants to enter the screen. It is an object of the present invention to provide a waterway installation type crushing device that can be easily loosened even when entangled.

[0005]

Means for Solving the Problems A screen device S and a crusher 1 are installed transversely in a waterway to crush foreign matters in sewage. The screen device S is installed obliquely in the waterway. The screen 2 of the screen device S is slid in the front-rear direction by a crank or cam mechanism, and the foreign substances blocked by the screen 2 are collected and crushed by the crusher 1 installed on one side of the screen device S. It is characterized by

[0006]

[Operation] Since the screen is installed diagonally in the waterway, foreign matter is guided by the screen and guided to the shredder along with the water flow, and by sliding the screen back and forth, the water flow pulsates on the screen surface. The movement is caused, and the foreign substances that tend to be entangled with the screen or the foreign substances that are entangled with each other are loosened to prevent the screen from being clogged, improve the discharge effect, and collect the foreign substances into a crusher and crush them.

[0007]

Embodiments of the present invention will now be described with reference to FIGS. In FIG. 1, reference numeral 1 is a well-known, for example, two-axis rotor type crusher, which is arranged in parallel by a machine frame 4 on one side of the screen device S. The screen device S is attached to the machine frame 4 so that the screen surface can be installed obliquely intersecting the water flow direction of the water channel W. From the screen 2, the screen holding frame 5, and the screen slide drive unit M. It is configured. The screen 2 is preferably a bar screen having horizontal eyes in order to easily guide the foreign substances in the sewage to the crusher 1, and is incorporated in the screen frame 3 to further increase the rigidity of the screen. The screen frame 3 is held in the screen holding frame 5 by a screen slide driving unit M described later so as to be slidable only in the front-rear direction. The screen slide drive unit M includes a bearing 9 attached to a machine frame 6 standing upright on the rear surface side of the center of the screen, a crank shaft 7 supported by the bearing 9, and a crank shaft 7. A crank pin 10 that is continuously provided and has an eccentricity e, a transmission link 8 that engages with the crank pin 10 via a bush 9 ', and a bracket that projects the transmission link 8 toward the rear surface side of the central portion of the screen frame 3. It has a structure in which 11 is connected by a pin 12. 13 is a screen sliding electric motor, 14 is a speed reducer, and 15 is a shaft coupling. Reference numeral 16 is a slide block which is interposed between the screen frame 3 and the machine frame 4 at four positions in the vertical and horizontal directions in order to smoothly slide the screen. This slide block adopts various methods such as a plane sliding method using a shoe, a linear shaft method, a guide roller method, etc. Whichever method is used, sand, dust, etc. do not enter, there is little sliding resistance, and it is strong. It needs to be one. Reference numeral 17 is a water flow guide for preventing the water flow from staying at a certain place, 1
Reference numeral 8 is a closing bellows for preventing impurities from passing through a gap between the sliding screen 2 and the crusher 1, and 19 is an electric motor for the crusher.

The present invention has the above-mentioned structure. When the sliding electric motor 13 is driven, the crankshaft 7 and the crankpin 10 rotate, and the transmission link 8 engaged with the crankpin 10 is eccentric to the crankpin 10. Twice the quantity e, that is, 2
Only the e-stroke slides in the direction of the arrow in Fig. 1, and the screen 2
Slide back and forth. Therefore, the foreign substances that have flowed along with the sewage are blocked by the front surface of the screen 2, and the screen is installed diagonally to the water flow. It is collected in the crusher 1 while following the locus of the arrow a in 1. Even if the water flow pulsates due to the sliding motion of the screen surface in the front-rear direction and foreign matter is entangled with the screen surface, the action of loosening the foreign matter works to further improve the discharge effect. Thus, the impurities in the sewage are finely crushed by the crusher 1 and dispersed in the water,
It will be treated at the latter stage sewage treatment facility. In the above embodiment, the crank mechanism is adopted as the sliding motion mechanism of the screen. However, a cam mechanism is provided in the lower end of the shaft 7 instead of the crank pin, and the cam and the transmission link 8 are engaged with each other. May be adopted.

[0009]

According to the present invention, a crusher is continuously provided on one side of the screen device S, and the screen 2 of the screen device S is installed obliquely with respect to the water flow in the water channel. Since it is slid in the front-back direction, contaminants in the sewage are automatically collected by the crusher while being guided by the screen surface without being entangled with the screen. Also,
By making the screen a bar screen having horizontal eyes, it is possible to further enhance the guide effect of foreign matters, and it is possible to provide a strong screen that has little water flow resistance and is structurally resistant to deformation and damage. is there.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view taken along the line BB of FIG. 2 showing a usage state of the device of the present invention.

FIG. 2 is a side view seen from the line AA in FIG.

FIG. 3 is an explanatory diagram of a sliding movement of a screen by a crank mechanism.

FIG. 4 is a partial vertical sectional view of a crank mechanism.

FIG. 5 is a perspective view of a conventional device.

[Explanation of symbols]

1 Crusher 2 Screen 3 Screen Frame 4 Machine Frame 5 Screen Holding Frame 6 Machine Frame 7 Crankshaft 8 Transmission Link 9 Bearing 9'Bush 10 Crankpin 11 Bracket 12pin 13 Screen Sliding Motor 14
Speed reducer 15 Shaft coupling 16 Slide block 17 Water flow guide 18 Bellows 19 Motor for crusher e Eccentricity S Screen device S'Rotary screen M Screen sliding drive W Water channel

Claims (3)

[Claims] 1. A device for crushing contaminants in sewage by installing a screen device (S) and a crusher (1) across a waterway, the screen device (S) being installed obliquely in the waterway. A crusher installed on one side of the screen device (S) for removing foreign substances blocked by the screen (2) by sliding the screen (2) of the screen device (S) in the front-back direction. A device for crushing foreign substances in sewage, characterized by collecting and crushing to 1). 2. The apparatus for crushing impurities in sewage according to claim 1, wherein the screen (2) is composed of a bar screen having horizontal eyes. 3. The apparatus for crushing impurities in sewage according to claim 1 or 2, wherein the screen (2) is slid in the front-rear direction by a crank or cam mechanism.