JPH0222004Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sludge scraper, and particularly to a sludge scraper installed in a rectangular settling basin of water treatment equipment such as sewage treatment and industrial wastewater treatment.

[Prior Art] A sludge scraper is installed in a sedimentation tank such as a sewage treatment tank or an industrial wastewater treatment tank to scrape the sludge deposited thereon to one side. As shown in Figure 6, this sludge scraping machine generally has an endless main chain a that spans one side (tight side) along the bottom c of settling tank b, and the other end (slack side) for sedimentation. pond b
The sludge accumulated on the pond bottom c is scraped up into the discharge groove e on one side by a scraper d which is attached to the tension side of the main chain a.
The main chain a is driven by a drive device f installed above the water via a drive chain g.

[Problems to be solved by the invention] By the way, in the conventional sludge scraper h, since the main chain a runs underwater, corrosion and wear of the main chain a, the drive chain g, the sprocket i, etc. This was easy to happen, and depending on the water quality, they had to be replaced every two to three years, so their lifespan was short. Further, since the bearing of sprocket i is located near the basin bottom c, it is inconvenient for maintenance, and it is necessary to empty the settling basin b each time the maintenance is carried out.

The present invention was devised in consideration of the above circumstances, and its purpose is to provide a sludge scraper that is highly durable and easy to maintain.

[Means for Solving the Problems] The present invention is a sludge scraper that is installed in a rectangular settling tank such as a sewage treatment tank and scrapes the sludge that accumulates therein into a discharge groove on the bottom of the tank. A raking tool provided above the water surface and having a rake member at its lower part, and an output end which is provided above the water surface and extends forward toward the discharge groove side and is turned back and circulated above the output end at a plurality of locations separated at least in the forward direction. and a link device that synchronizes and drives these, and a plurality of arm members whose upper ends are pivoted to the output end and whose lower ends are fixed to the scraper to transmit the circulating drive of the output end. It is.

[Function] With the above configuration, the raking tool is held by the link device via the arm member, and when the output end moves forward, the rake member slides into contact with the pond bottom to discharge accumulated sludge. Scrape into the groove. After that, when the output end is folded back, the rake member is separated from the pond bottom and returns to its original position.

[Embodiment] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall view showing a schematic configuration of a sludge scraper according to the present invention, FIG. 2 is a side view of a link device, and FIG. 3 is a plan view of FIG. 2.

As shown in the figure, in a rectangular sedimentation tank 1 such as a sewage treatment tank or an industrial wastewater treatment tank, sludge deposited on the bottom 2 of the tank is drained into a discharge groove 3 provided on one side of the bottom 2. A sludge scraper 4 is provided that scrapes the sludge from the side and drops it. This sludge scraper 4 includes a scraper 5 provided along the pond bottom 2, an arm member 6 whose lower end is fixed to the scraper 5, and an output end 18 at the upper end of the arm member 6. It is mainly composed of a link device 7 which is pivotally supported. The upper end of the arm member 6 extends above the water surface, and the link device 7 is installed above the water (on the ground).

The scraping tool 5 is constructed by vertical frame members 8 provided on both sides of the sedimentation tank 1 along the moving direction, and horizontal frame members 9 spanned over the vertical frame members 8 at appropriate intervals. It is formed into a rectangle. At the lower part of the horizontal frame member 9, there is a rake member 10 made of an elastic material that is suspended along the horizontal frame member 9 in a direction perpendicular to the moving direction of the scraper 5, that is, in a substantially vertical direction, and that substantially scrapes the sludge. They are arranged at predetermined intervals. The arm member 6 is formed with a predetermined length such that the rake member 10 slides on the pond bottom, and has four corners of the raking tool 5.
It is attached integrally with the vertical frame member 8.

The link device 7 consists of four identical link mechanisms 11 and a motor 12 as a drive source for the link mechanisms 11, two of which are provided on each side of the water upper part of the sedimentation basin 1. ing. 2 and 3 show one side of the link device 7 provided on one side of the water upper part of the sedimentation tank 1.

As shown in FIG. 4, each link mechanism section 11 is composed of a known four-section rotating chain mechanism, and includes a crank section 15 and a swing section 16 that are pivotally supported by a casing 13, which is a fixed section 14, and a connecting rod that connects them. Section 17
In the middle of this conrod section 17,
An output end 18 for supporting arm member 6 is formed. This output end 18 undergoes a circular movement as shown by the broken line due to the actuation of the crankshaft 15. That is, in the figure, in section A, the rake member 10 of the raking tool 5 is brought into sliding contact with the pond bottom 2 and moved forward toward the discharge groove 3 side,
In section B, the rake member 10 is raised to break off contact with the pond bottom 2, and in section C, it is turned back and returned to its original position.

Further, as shown in FIGS. 2 and 3, the link mechanism section 11 includes a drive side link mechanism section 11 equipped with a motor 12 as its power source and a speed reducer 19, and a link mechanism section 11 on the drive side. A link mechanism part 11 on the driven side driven by a connecting rod 20 to the part 11
These are located at predetermined intervals in the anterograde direction (horizontal direction in the figure). Further, the crankshaft 21 of the link mechanism 11, the fixed shaft 22 of the swing joint 16, and the pivot shaft 23 that pivotally supports the arm member 6 at the output end 18 are each provided on the other side of the sedimentation basin 1. It spans over a link mechanism section (not shown), thereby connecting the four link mechanism sections 11.
are now driven synchronously.

As shown in FIG. 5, the rake members 10 are arranged at intervals P shorter than the movement stroke S of the scraper 5 in the direction of the discharge groove 3, and each rake member 10
The sludge raked up by the sludge is sequentially transferred to an adjacent rake member 10 for each cycle of the raking tool 5, and is guided to the discharge groove 3 and dropped therein.

Therefore, when the respective link mechanisms 11 operate synchronously due to the rotation of the motor 12, each output end 18 is circulated, and this is transmitted by the arm member 6, so that the raking tool 5 is activated by the rake member. 10
While slidingly contacting the pond bottom 2, the rake member 10 is moved toward the discharge groove 3 side, and after moving a predetermined distance, the rake member 10 is separated from the pond bottom and returned to its original position.

As described above, the sludge scraper 4 of the present invention is configured such that the scraper 5 installed along the bottom 2 of the settling tank 1 is driven by the link device 7 installed above the water via the arm member 6. Therefore, there are no sliding parts that move in water and are susceptible to corrosion or wear, such as the main chain, drive chain, and their sprockets of conventional sludge scrapers. Therefore, the durability (life) of the scraper 4 itself is greatly improved, and even if the link device 7, which is the drive system, wears out, since it is installed above the water, the settling tank 1 There is no need to empty the inside, and wear parts can be easily replaced and maintained.

Furthermore, since there are no sprockets, their bearings, or main chains wrapped around these sprockets in the sedimentation tank 1, the installation work of the sludge scraper 4 can be greatly reduced, and the construction period can be shortened. , construction costs can be reduced.

The scraping tool 5 of the present invention is suspended by the link device 7 via the arm member 6.
Since the link mechanism parts 11 (output ends 18) are provided at multiple locations and are driven in synchronization, it is possible to stably maintain a posture along a predetermined pond bottom, and there is no sliding part in the water. It realizes a mechanism that does not exist at all. In this embodiment, four link mechanisms 11 are provided corresponding to the four corners of the rectangular scraper 5.
However, it is sufficient to provide them at least in the anterograde direction.

In this embodiment, the link mechanism section 11 of a four-bar rotation chain mechanism is adopted as the drive system of the scraping tool 5, but the present invention is not limited to this, and the arm member 6 is supported. It is sufficient if the output end 18 is provided with a link mechanism that allows the output end 18 to circulate approximately linearly in the direction of the discharge groove portion 3.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

(1) A raking tool having a rake member, and a link device having an output end that is installed on the water and circulates appropriately;
Since it is equipped with an arm member that transmits the circulation of the output end to the scraper, there are no parts that are easily corroded or worn out in the water, improving durability and simplifying the maintenance and installation of sliding parts. be able to.

(2) Since the output ends are separated in the forward direction and the synchronized drive is transmitted by multiple arm members, the scraper can be stably held in a position along the pond bottom, and the sludge scraping operation can be improved. can be done reliably.

[Brief explanation of the drawing]

Fig. 1 is an overall view showing the schematic configuration of the sludge scraper according to the present invention, Fig. 2 is a side view showing the link device of the sludge scraper shown in Fig. 1, and Fig. 3 is a plan view of Fig. 2. 4 is a block diagram of the link mechanism, FIG. 5 is a side view illustrating the movement of the scraper, and FIG. 6 is a schematic diagram of the conventional sludge scraper. In the figure, 1 is a rectangular settling tank, 2 is a pond bottom, 3 is a discharge groove, 4 is a sludge scraper, 5 is a scraper, 6 is an arm member, 7 is a link device, 10 is a rake member, and 18 is an output It's the edge.

Claims (1)

[Scope of utility model registration request] A sludge scraper installed in a rectangular settling tank such as a sewage treatment tank and scraping the sludge deposited therein into a discharge groove at the bottom of the tank, the scraper being installed along the bottom of the tank and having a rake member at the bottom thereof. and a plurality of output ends which are provided above the water surface and which circulate progradely toward the discharge groove side and turn back upwards thereof are provided at least at a plurality of locations apart from each other in the prograde direction, and these output ends are driven in synchronization. A sludge scraper comprising a link device and a plurality of arm members whose upper ends are pivotally supported by the output end and whose lower ends are fixed to the scraper to transmit the circulation drive of the output end. Machine.