JPH0596188U - Pump pretreatment equipment in sewer facilities - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the blockage of the suction port of the pump in the sewer system by treating the residue in the wastewater at low cost. A disc screen 1 composed of a plurality of discs 1a is rotatably supported by a vertical rotation shaft 2, and a residue crushing device 5 having a multilayer crushing blade body 5b which is rotated around the vertical axis is installed in the disc screen 1 In addition to being located in the gap Ws between the outer periphery of the disk and one of the inner walls of the water channel Wc, by disposing a scraper 6 scraping off the residue adhering to the disk 1a between the disk screen 1 and the residue crushing device 5, Since a large amount of sewage Wd can be passed through the disc screen 1 having a wide sewage flow area and can be sent to the residue crushing device 5 side, blockage of the suction port of the pump can be easily prevented and Since there is no need for a large-scale residue crushing treatment device, the equipment and management costs are low.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a pump pretreatment facility in a sewer system, and more particularly to a pump pretreatment facility in a sewer system equipped with a crushing device.

[0002]

[Prior Art]

 As is well known, there is a residue in the wastewater flowing through the waterways of the sewerage system, and when pumping up the wastewater, the suction port of the pump (not shown) is blocked by the residue, so this kind of blockage problem occurs. To prevent this, a pump pretreatment facility, which will be described later, is installed upstream of the pump installation position.

First, in the pump pretreatment facility according to the first conventional example, as shown in a schematic side view of FIG. 4a and a view of the arrow D of FIG. A disc screen 1 rotatably supported by a horizontal rotation shaft 2 is provided, and the disc screen 1 is horizontally supported near the upper edge of the water channel Wc. By rotating the horizontal rotary shaft 2 via 4a, the outer periphery of the upper part is continuously rotated in a direction coinciding with the flow direction of the dirty water Wd.

Therefore, the fine residue smaller than the interval T between the discs 1a of the disc screen 1 passes through as it is, and the fine residue attached to the peripheral end of the disc 1a is sent to the downstream side as the disc 1a rotates. On the other hand, since the size residue that does not adhere to the peripheral edge of the disk 1a is retained on the upstream side of the disk screen 1, the suction port is not blocked by the residue and the continuous operation of the downstream pump is continued. can do.

As shown in FIG. 5a of the configuration diagram of the pump pretreatment facility according to another embodiment of the first conventional example, a protrusion 1b is provided around the outer periphery of the disk 1a, and As shown in FIG. 5b of the configuration explanatory diagram of the pump pretreatment equipment according to another embodiment related to the first conventional example, the disk screen 1 There is also a fixed screen 7 disposed above the above so as to prevent the residue from flowing downstream even if the water level rises.

Further, as shown in FIG. 6a of the schematic configuration diagram, the pump pretreatment facility according to the conventional second conventional example, which is often seen in small-scale pumping stations, has a residue over the entire width of the water channel Wc. The residue crushing device 5 for crushing the residue is disposed, and the residue crushing device 5 is caused to pass the entire amount of the waste water Wd to crush the residue to a predetermined size, and the downstream of the suction port of the pump P. I try to prevent the blockage.

Further, as shown in FIG. 6b of the schematic configuration explanatory view, the pump pretreatment facility according to the conventional third conventional example, which is often seen in general pumping stations, removes dust over the entire width of the water channel Wc. The device 1 is installed, and the screen residue of the dust removing device 1 is scraped up to remove the screen residue from the wastewater Wd, and the scraped screen residue is pumped by the crushing device 5 installed on the ground. After being crushed to a size that does not block the suction port, it is returned to the water channel Wc. In some cases, the scraped up residue is washed and dehydrated before being carried out of the site.

[0008]

[Problems to be solved by the device]

 First, in the first conventional example, the suction port is used in pretreatment equipment such as a screw pump in which the suction port is relatively unlikely to be blocked, and its main purpose is to prevent the flow of bulky refuse. Therefore, a screen residue post-treatment device is required to scrape the screen residue that does not pass through the screen and to treat and dispose of the screen residue, and it can perform its function when the water level in the water channel changes greatly. There is a problem that needs to be resolved.

Further, in the second conventional example, since the entire amount of wastewater is passed through the crushing treatment device having a narrow wastewater flow area, the head loss increases due to an increase in the resistance of the waterway, so a large amount of wastewater is passed through the waterway. In addition to this, there is a problem to be solved that excessive power is required because the crushing processing device is large.

Further, in the third conventional example, various devices such as a dust removing device, a belt conveyor, a chute, etc. are required, and since the devices are installed in the upper part of the water channel, they are generated from the residue. Since the equipment for odor control etc. will also be large-scale, not only will the initial investment become enormous, but there will be a problem to be solved in the economic crisis, which requires labor for maintenance.

Therefore, an object of the present invention is to solve the problems of the above-mentioned conventional example, to provide a sewer system having a simple structure, capable of draining a large amount of wastewater without requiring a residue treatment facility. To provide pump pretreatment equipment.

[0012]

[Means for Solving the Problems]

 The present invention can secure a wide sewage distribution area by adopting the excellent configuration of each of the above-mentioned conventional examples for the pump pretreatment facility in the sewerage system, that is, by adopting the disk screen, and further, by using this, a residue crushing device for crushing residue By adding these, the problems of the above-mentioned conventional example can be solved.

Therefore, in order to solve the above-mentioned problems, the feature of the means adopted by the pump pretreatment facility in the sewerage system according to the present invention is that it is arranged on the upstream side of the pump in the water channel where the wastewater flows. At least in a pump pretreatment facility in a sewer system equipped with a disc screen consisting of a plurality of discs that are immersed in sewage flowing in the water channel and rotated, and are arranged at predetermined intervals, the disc screen is vertically A shavings crushing device, which is rotatably supported around the axis and has a rotary blade for crushing the shavings by rotation, is provided on the inner wall side of the water channel in which the rotation direction of the disk screen matches the flow direction of the dirty water. In addition to the provision of a scraper, a scraper having a scraper scraping part in contact with the side surface of the disc of the disc screen is provided between the disc screen and the scraper crushing device. It's in the middle of a par.

[0014]

[Action]

 According to the pump pretreatment facility in the sewer system according to the present invention, by increasing the number of discs and increasing the height of the disc screen, it is possible to easily cope with the rise of the level of the sewage flowing in the water channel, and moreover, the disc screen. As a result, a large sewage flow area can be secured, and in addition, since the residue crushing device is attached to crush the residue, there is no need for a treatment facility for residue.

[0015]

【Example】

 Hereinafter, an embodiment of a pump pretreatment facility in a sewerage system according to the present invention will be described with reference to FIG. 1a of its plan view and FIG. 1b of FIG. Those having the same function will be described with the same reference numerals.

That is, reference numeral Wc shown in the drawing is a water channel, and in this water channel Wc, a disc screen 1 composed of a multi-layer disc body in which a plurality of discs 1 a are arranged with a predetermined interval T is provided. It is rotatably supported by 2, and the lower end of the vertical rotation shaft 2 is fitted to a bearing 2a which is fixed to a position deviated to one side from the center in the width direction of the bottom surface of the water passage Wc, that is, fixed to the left side in the figure. On the other hand, the upper end of the disc screen 1 is directly connected to the drive motor 4 provided on the frame 3 covering the water channel Wc, and the vertical rotary shaft 2 rotates to rotate the disc screen 1 (counterclockwise in FIG. 1a). Is configured to be. The projections 1b, which are formed around the outer periphery of the disc 1a at a predetermined interval, serve to retain the residue and send it to the residue crushing device described later.

In FIG. 1 a, an upward white arrow indicates the flow direction of the dirty water Wd, and most of the dirty water Wd passes through the disc screen 1 with respect to the width W of the water channel Wc. In this case, the residue captured by each disc 1a of the disc screen 1 is accompanied by the rotation of the disc screen 1, and the gap Ws between the outer periphery on the right side of the disc screen 1 in the drawing and the inner wall on the right side of the water channel Wc. It is arranged so that it will be guided to the residue crushing device 5 side, which will be described later and is arranged between them.

The residue crushing device 5 has two sets of multi-layer crushers having a plurality of disk-shaped crushing blades at predetermined intervals in a vertically long rectangular frame 5a fixed to the right inner wall of the water channel Wc. The blade body 5b is rotatably supported about a vertical axis, and the crushing blades of the two sets of multilayer crushing blade bodies 5b are in alternate positions, that is, as well understood from FIG. 1b, One crushing blade is arranged in the middle of the other crushing blade, and is rotated by the drive motor 4c.

Further, between the disc screen 1 and the residue crushing device 5, the upper and lower side surfaces of the disc 1a of the disc screen 1 are brought into contact with each other to scrape off fine dust residue adhering to the disc 1a. A scraper 6 is provided, which is provided with a scraping unit 6a and which is provided with a scraper 6 for guiding the scrap accumulated on the upstream side of the disc screen 1 to the scrap crushing device 5 side.

The size of the gap Ws between the outer circumference of the disc screen 1 and the right inner wall of the water channel Wc is determined by the amount of trapped residue and the size of the residue crushing device 2, and the disc 1 a of the disc screen 1 The size of the space T is determined by the size of the residue or the size of the residue that does not obstruct the closing of a pump (not shown) installed on the downstream side, while the height size of the residue crusher 5 is determined by the amount of residue. .. When the height of the residue crushing device 5 is set shorter than the height of the disc screen, the bottom of the water channel Wc is provided with an inclination so that the residue is sent to the crushing device 5 side by the waste water Wdk flow. good.

The operation mode of the pump pretreatment facility will be described below. By increasing the number of disks 1a and increasing the height of the disk screen 1, it is possible to easily cope with an increase in the water level of the sewage Wd flowing in the water passage Wc. As a result, the function is not lost as in the first conventional example, and since a large sewage distribution area can be secured by the disc screen 1, the head loss is increased as in the second conventional example. There is no need to reduce the flow rate of sewage Wd.

Further, since the residue crushing device 5 is additionally provided, which allows the residue to be reliably crushed, there is no need for a treatment facility for accumulated residue and the dust removing device as in the third conventional example. In addition to eliminating the need for large-scale equipment like the one described above, and because there are few equipment, it is possible to reduce equipment costs and maintenance costs related to pump pretreatment equipment, and there are almost no equipment above the waterway Wc. Therefore, there is an effect that deodorant measures can be easily taken.

Next, an embodiment of a pump pretreatment facility according to another embodiment is different from the above embodiment in terms of configuration, and FIG. 2a of the plan view thereof and a view of the arrow B view of FIG. 2a. 2b, this embodiment is an embodiment in which the width W of the water channel Wc is wide. Due to the width W of the water channel Wc, the disk disk having the same configuration as that of the above-described embodiment is formed in the water channel Wc. It is configured such that two sets of the lean 1 are arranged.

In this case, as is well understood from FIG. 2 a, each disc screen 1 is synchronously rotated in the same counterclockwise direction by the drive motor 4 via the bevel gears. A structure in which the disc 1a of one disc screen 1 is located between the discs 1a of the other disc screen 1 and the outer periphery of the disc 1a is slightly overlapped so as not to cause accumulation of residue between them. I am trying.

Therefore, in the pump pretreatment facility according to this embodiment, only two sets of the disc screens 1 are installed, and the scraper 6 can surely send the residue to the residue crushing device 5, This embodiment has the same effect as the above embodiment.

Furthermore, the embodiment of the pump pretreatment equipment according to another embodiment is different from the above-mentioned embodiment in the configuration, and its plan view is shown in FIG. 3A and the arrow C view in FIG. 3A. To explain with reference to FIG. 3b, in this embodiment, a disc screen 1 having a diameter substantially corresponding to the width W of the water channel Wc is arranged in the water channel Wc, and the width Ws is provided in one of the water channels Wc. The bypass water passage Wb is provided, and the residue crushing device 5 and the scraper 6 are arranged in the bypass water passage Wb.

In the case of this embodiment, as described above, since the disc screen 1 is configured to fill the width W of the water channel Wc, the distribution area of the wastewater Wd can be made wider, resulting in the head loss. There is a great effect on the reduction, and other than that, it is the same effect as the above embodiment.

[0028]

[Effect of the device]

 As described above in detail, according to the pump pretreatment facility in the sewer system according to the present invention, it is easy to increase the water level of the sewage flowing in the water channel by increasing the number of disks and increasing the height of the disk screen. Therefore, the function is not lost due to the rise of the water level unlike the first conventional example, and since the disc screen is used, a wide sewage distribution area can be secured. In addition to the fact that the head loss is small and a large amount of sewage can be flowed, as well as the residue crushing device is attached, the residue can be crushed, so that there is no need for a treatment facility for the residue, Unlike the third conventional example, it does not require a large-scale ground facility, and has a great effect on reduction of initial investment cost and maintenance cost and facilitation of deodorizing measures.

[Brief description of drawings]

FIG. 1a is a plan view of a pump pretreatment facility in a sewerage system according to an embodiment of the present invention, and FIG. 1b is a view on arrow A of FIG. 1a.

FIG. 2a is a plan view of a pump pretreatment facility in a sewerage system according to another embodiment of the present invention, and FIG.
[Fig. 2] is a view on arrow B of Fig. 2a.

FIG. 3a is a plan view of a pump pretreatment facility in a sewer system according to another embodiment of the present invention,
3b is a view on arrow C of FIG. 3a.

FIG. 4a is a plan view of a pump pretreatment facility in the sewer system according to the first conventional example, and FIG. 4b is FIG. 4a.
FIG.

5A is a configuration explanatory view of a pump pretreatment facility according to another first embodiment, and FIG. 5B is a configuration explanatory diagram of another pump pretreatment facility according to another first embodiment. is there.

FIG. 6a is a schematic configuration explanatory diagram of a pump pretreatment facility according to a second conventional example, and FIG. 6b is a schematic configuration explanatory diagram of a pump pretreatment facility according to a third conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc screen, 1a ... Disc, 1b ... Protrusion, 2 ... Vertical rotation axis, 2a ... Bearing, 3 ... Stand, 4, 4c
... drive motor, 5 ... residue crusher, 5a ... frame, 5b ...
Multi-layer crushing blade, 6 ... scraper, 6a ... residue scraping unit, T
... Gap between discs, W ... Width of water channel, Wb ... Bypass water channel, Wc ... Water channel, Wd ... Sewage, Ws ... Gap between outer periphery of disk screen and inner wall of water channel.

Claims (1)

[Scope of utility model registration request] 1. A plurality of discs arranged at an upstream side of a pump of a water passage through which the waste water flows, at least a part of which is immersed in the waste water flowing through the water passage and rotated, and arranged at predetermined intervals. In a pump pretreatment facility in a sewer system equipped with a disc screen, the disc screen is rotatably supported around a vertical axis, and the rotation direction of the disc screen is on the inner wall side of the water channel in which the flow direction of the sewage matches. , A scraper crushing device having a rotary blade for crushing the scraps by rotation is provided, and a scraper having a scrape scraping part in contact with the side surface of the disc of the disc screen is interposed between the disc screen and the scraper crushing device. A pump pretreatment facility for sewerage facilities.