JPH06285304A - Resin chain for scraping sludge - Google Patents

Abstract

PURPOSE:To lessen the wear of the resin chain by biting of sand, etc. CONSTITUTION:The resin chain 1 for scraping sludge by immersing the chain into sewage is provided with grooves 2 for escape of microsolids in the required positions on the outer peripheries of pins 1b constituting the chain 1 and is provided with holes 3 for escape of the microsolids communicating with the grooves 2 from at least one end face of the pins 1b or is provided with grooves for escape of the microsolids extending to at least one end of the pins from the required positions on the outer peripheries of the pins 1b in place of the grooves 2 and the holes 3 communicating therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin chain for scraping sludge used in a sedimentation tank in a sewage treatment plant or a sewage treatment facility of a water treatment facility.

[0002]

2. Description of the Related Art In the sewage treatment plants and sewage treatment facilities as described above, metal chains have hitherto been used as chains used for scraping sludge in a sedimentation basin. From the viewpoint of corrosion resistance and energy saving, resin-made ones are often used.

Various engineering plastics are adopted as the material of such a resin chain, which is manufactured by injection molding. And the chain 1 is shown in FIG.
As shown in (a), it is composed of a chain body 1a and pins 1b, and a chain barrel portion 1c of the chain body 1a.
The pin 1b is inserted into and is connected. Although not shown in the figure, one of the dozens of chains has an attachment, but the main shape of the chain body 1a is the same.

[0004]

By the way, since this type of resin chain is used in dirty water, sand and solid particles floating in the dirty water or adhering to the chain during use are
It is often caught between the chain barrel of the chain body and the pin.

The chain body and the pin may be made of the same material of engineering plastic or different materials of engineering plastic. However, due to the sand or the like as described above, the outer circumference of the pin or the chain / parel part is The circumference will be significantly worn, and if left as it is, it will cause an accident such as breakage.

The present invention has been made in view of the above problems of the conventional resin chain of this type, and provides a sludge scraping resin chain capable of reducing wear of the chain due to biting of sand or the like. The purpose is to do.

[0007]

In order to achieve the above-mentioned object, the sludge scraping resin chain of the present invention is a resin chain for scraping sludge by being immersed in waste water. At the outer peripheral required position of the pin, a micro solid escape groove is provided at the outer peripheral required position or at least one end of the pin from the outer peripheral required position of the pin, and at least one end face of the pin communicates with the groove. A solid material escape hole is provided, or, instead of the groove and the hole communicating with the groove, a minute solid matter escape groove is provided from a required outer peripheral position of the pin to at least one end of the pin. Of.

[0008]

In the resin chain for sludge scraping of the present invention, fine solid matter such as sand trapped between the pin and the chain / barrel is caught between the pin and the chain / barrel through the groove and the hole or the groove. Is excluded from the outside.

[0009]

EXAMPLE A resin chain for scraping sludge according to the present invention will be described below with reference to examples shown in FIGS. 1 and 2. FIG. 1 is a view showing a first embodiment of the resin chain of the present invention,
(A) is a plan view of the resin chain, (b) is a front view showing a first embodiment of the pin, (c) is a sectional view taken along line bb of (b) of FIG.
2A to 2C are front views showing the second to fourth embodiments of the pin.

According to the present invention, the pin 1b constituting the chain 1 is
To the outer peripheral required position, that is, to the required position or the required range in the fitting portion of the pin 1b and the chain barrel portion 1c, from the one end face of the relief hole 2 of the minute solid or the pin 1b to the above-mentioned groove 2. Small solid material escape hole 3
Is provided.

That is, in FIGS. 1B and 1C, a groove 2 is provided at a substantially central portion in the above-mentioned fitting portion, and a hole for releasing a solid solid substance communicating with the groove 2 from one end surface of the pin 1b. 2 is provided with a spiral groove 2a in a required range in the fitting portion in place of the groove 2 shown in FIG. 1, and FIG. 2B is a groove 2 shown in FIG. In place of the above, a vertical solid groove 2b for releasing fine solids from the outer peripheral required position in the fitting portion of the pin 1b to one end of the pin 1b is provided, (c) is a groove 2b similar to (b). In addition, three grooves 2 similar to those shown in FIG. 1 are provided in the fitting portion, and holes 3 communicating with one end surface of the pin 1b are provided in these three grooves 2.

The sizes of the grooves 2, 2a, 2b and the holes 3 are small solids such as sand, and those of the grooves 2, 2a, 2b and the holes 3.
It may be of a size necessary to be able to be removed from the fitting portion to the outside through the. Although FIG. 2B shows the case where both the groove 2b and the hole 3 are provided, it goes without saying that only the groove 2b may be provided.

[0013]

As described above, in the resin chain of the present invention, the fine solid matter such as sand caught between the pin and the chain barrel is not treated as the pin through the groove and the hole or the groove. Since it is excluded from the space between the chain barrels to the outside, the wear of the pin is reduced and the number of times the pin is replaced is reduced.

Therefore, the cost can be reduced, and at the same time, the pin replacement time can be shortened, and the work efficiency can be improved.

[Brief description of drawings]

1A and 1B are views showing a first embodiment of a resin chain of the present invention, FIG. 1A is a plan view of a resin chain, FIG. 1B is a front view showing a first embodiment of a pin, and FIG. ) Is a bb sectional view of the drawing.

2A to 2C are front views showing second to fourth embodiments of the pin.

[Explanation of symbols]

 1 chain 1b pin 1c chain / barrel part 2 groove 2a groove 2b groove 3 hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaki Ishikawa 5-3-8 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Inventor Yoshio Sawa 17th Nihonbashi Koamicho, Chuo-ku, Tokyo No. 9 Ataka Kogyo Co., Ltd. (72) Inventor Toshinori Wada 17-9 Nihombashi Koami-cho, Chuo-ku, Tokyo Ataka Kogyo Co., Ltd. (72) Inventor Yoshikazu Nakagawa Fukumitsu Doubu 1200, Santomi-gun, Toyama Prefecture Sanko Sanko Synthetic Co., Ltd. (72) Inventor Atsushi Kaneko 1200, Fukumitsu Tobu, Nishitonami-gun, Toyama Prefecture Sanko Synthetic Co., Ltd.

Claims (2)

[Claims] 1. A resin chain for dipping in sludge to scrape off sludge, wherein at least one end of the pin is located at a required position on the outer periphery of a pin constituting the chain, or a groove for releasing fine solids or a required position on the outer periphery of the pin. A resin chain for scraping sludge, characterized in that it has a groove for escaping the minute solids leading to the above and a hole for escaping the minute solids communicating with at least one end face of the pin to the groove. 2. Instead of the groove and the hole communicating with the groove,
A sludge scraping resin chain, which is provided with a groove for escaping fine solid matter from a position required on the outer periphery of the pin to at least one end of the pin.