JP4819752B2 - Sludge scraping tool and its assembly method - Google Patents

Sludge scraping tool and its assembly method Download PDF

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JP4819752B2
JP4819752B2 JP2007153426A JP2007153426A JP4819752B2 JP 4819752 B2 JP4819752 B2 JP 4819752B2 JP 2007153426 A JP2007153426 A JP 2007153426A JP 2007153426 A JP2007153426 A JP 2007153426A JP 4819752 B2 JP4819752 B2 JP 4819752B2
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sludge
scraping
treatment tank
scraping tool
sludge treatment
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和彦 米山
学 村松
修史 大塚
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Aquaintec Corp
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Description

この発明は、汚泥沈砂池などの汚泥処理槽に使用され、汚泥処理槽の底面上を汚泥ピットに対して往復移動し、それぞれが往復移動に直交する方向に延び、往復移動方向に間隔をおいた複数の掻寄エレメントからなる汚泥掻寄具及びその組み立て方法に関するものである。   This invention is used in a sludge treatment tank such as a sludge settling basin, and reciprocates on the bottom surface of the sludge treatment tank with respect to a sludge pit, each extending in a direction perpendicular to the reciprocating movement, and spaced in the reciprocating movement direction. The present invention relates to a sludge scraping tool comprising a plurality of scraping elements and an assembling method thereof.

汚泥沈砂池において汚泥の掻寄のための汚泥掻寄具として、ステンレス鋼板を素材とし、沈殿池の底面上を摺動し、それぞれが往復移動方向に直交する方向に延び、往復移動方向に間隔をおいた複数の掻寄エレメントからなるものが公知である。掻寄エレメントは、凹面状をなし、汚泥ピットに対向した掻き寄せ面（前面）と、前記掻き寄せ面より汚泥ピットから離間方向に沈殿池底面に向けて傾斜する傾斜面（背面）とからなる（特許文献１及び２）。   As a sludge scraping tool for sludge scraping in a sludge settling basin, a stainless steel plate is used as a material, sliding on the bottom of the settling basin, each extending in a direction perpendicular to the reciprocating direction, and spaced in the reciprocating direction. It is known to have a plurality of scraping elements with a gap. The scraping element has a concave shape, and includes a scraping surface (front surface) facing the sludge pit, and an inclined surface (back surface) inclined toward the bottom surface of the sedimentation basin in a direction away from the sludge pit from the scraping surface. (Patent Documents 1 and 2).

この種の汚泥掻寄具においては、各掻寄エレメントは沈殿池の実質的に全幅に延びる長大なものであり、それが沈殿池底面を掻寄方向（往復移動方向）に間隔をおいて多数設けられている。そのため、従来は汚泥掻寄具の組み立てに際しては、掻寄エレメントも含めた汚泥掻寄具の実質的に全パーツを分離した状態で持ち込み沈殿池内において現場合わせによって溶接により組み立てていた。
特開平５−２４５３０８号公報 特開２００３−２０５２０７号公報 In this type of sludge scraping tool, each scraping element is a long element extending substantially the entire width of the settling basin, and many of them are spaced at the bottom of the settling basin (reciprocating direction). Is provided. Therefore, conventionally, when assembling the sludge scraping tool, it was assembled by welding by bringing it into the settling basin in a state where substantially all the parts of the sludge scraping tool including the scraping element were separated.
Japanese Patent Laid-Open No. 5-245308 JP 2003-205207 A

従来は掻寄エレメントも含めた汚泥掻寄具の実質的に全パーツを分離した状態で沈殿池に持ち込み、現場合わせによって溶接組み立てしていた。しかしながら、掻寄エレメントも含めた汚泥掻寄具はステンレスを素材としており、溶接作業は熟練を要し、所期の溶接品質とするには厳密な品質管理が必須である。然るに、現場合わせの作業では溶接箇所が極めて多数あり、個々の溶接部位での溶接品質の管理は溶接箇所が極めて多数であるため殆ど不可能であり、溶接品質はなりゆきとなり、溶接の品質管理が不十分なままで組み立てられてしまう可能性があった。そのため、重要な部位においては溶接品質が不十分なまま稼動されることがあり、亀裂等の不具合が起こり得ることが懸念されていた。   Conventionally, substantially all parts of the sludge scraping tool including the scraping element are brought into the settling basin in a state where they are separated, and welded and assembled by field matching. However, the sludge scraping tool including the scraping element is made of stainless steel, and the welding work requires skill. Strict quality control is essential to achieve the desired welding quality. However, there are a large number of welding points in the field-to-site operation, and it is almost impossible to control the welding quality at each welding site because there are a large number of welding points. However, there was a possibility of being assembled with insufficient. For this reason, there is a concern that important parts may be operated with insufficient welding quality and defects such as cracks may occur.

この発明はかかる従来技術の問題点に鑑みなされたものであり、現地の溶接部位はなるべく少なくするようにし、溶接欠陥による不具合の発生を最小限に抑えることができるようにすることを目的とする。   The present invention has been made in view of the problems of the prior art, and aims to minimize the occurrence of defects due to welding defects by minimizing the number of local welding sites. .

この発明によれば、汚泥処理槽の底面上を往復移動する汚泥掻寄具であって、
複数の汚泥掻寄具ユニットを接続することにより組み立てられ、
各汚泥掻寄具ユニットは、
往復移動方向に平行に離間して複数配置され、各々が往復移動と実質的に直交する方向に延びる複数の掻寄エレメントと、
汚泥処理槽の幅方向における両側部において汚泥処理槽の底面に対向配置され、汚泥処理槽の底面から離間側において掻寄エレメントに固定され、往復移動方向と平行に延設される第１のスライド部材と、
汚泥処理槽の幅方向における中央部において汚泥処理槽の底面に対向配置され、汚泥処理槽の底面から離間側において掻寄エレメントに固定され、往復移動方向と平行に延設される第２のスライド部材と、
掻寄エレメントを挟んで第２のスライド部材と反対側に位置されかつ第２のスライド部材に一体化されたプルロッドとを備え、
隣接する汚泥掻寄具ユニット間において、第１のスライド部材同士及びプルロッド同士は一連に接続され、かつ
隣接する汚泥掻寄具ユニット間において第２のスライド部材同士は連接されずかつ第２のスライド部材の対向端面に隙間を残している汚泥掻寄具が提供される。 According to this invention , the sludge scraping tool that reciprocates on the bottom surface of the sludge treatment tank,
Assembled by connecting multiple sludge scraper units,
Each sludge scraper unit
A plurality of scraping elements arranged in parallel to and away from the reciprocating direction, each extending in a direction substantially perpendicular to the reciprocating movement;
A first slide that is disposed opposite to the bottom surface of the sludge treatment tank on both sides in the width direction of the sludge treatment tank, is fixed to the scraping element on the side away from the bottom surface of the sludge treatment tank, and extends parallel to the reciprocating movement direction. Members,
A second slide that is disposed opposite to the bottom surface of the sludge treatment tank at the center in the width direction of the sludge treatment tank, is fixed to the scraping element on the side away from the bottom surface of the sludge treatment tank, and extends parallel to the reciprocating movement direction. Members,
A pull rod located on the opposite side of the second slide member across the scraping element and integrated with the second slide member;
Between adjacent sludge scraper units, the first slide members and the pull rods are connected in series, and
The second sliding members to each other between adjacent sludge raking device unit sludge raking device has left a gap facing end surface of the articulated not and the second slide member Ru are provided.

この発明の汚泥掻寄具の組み立て方法にあっては、汚泥掻寄具を構成する複数のユニットは汚泥掻寄具を装着すべき汚泥処理槽に持ち込まれ、前記複数のユニットは汚泥処理槽において現場合わせにて第１のスライド部材同士及びプルロッド同士の一連接続を行うことにより汚泥掻寄具として組み立てられる。 In the method of assembling the sludge scraping tool of the present invention, the plurality of units constituting the sludge scraping tool are brought into the sludge treatment tank to which the sludge scraping tool is to be attached, and the plurality of units are disposed in the sludge treatment tank. It is assembled as a sludge scraper by performing a series connection of the first slide members and the pull rods at the site.

この発明の汚泥掻寄具は隣接する掻寄エレメント毎にユニット化され、各ユニットは工場で厳密な品質管理下で溶接されるため、高品質の溶接を維持することができる。そして、現場ではユニットの接続のための溶接のみ行われ、現場での溶接箇所が少ないため、溶接後の溶接品質の管理の負担も少ないため、溶接品質の管理も楽となりまた重要部分は工場で厳密な品質管理の下で溶接済であるため欠陥を残したまま稼動されてしまう恐れも少なくなり、また、溶接歪を修正して現地へ出荷できるので、長期に亘って安定な作動を確保することができる。   The sludge scraping tool of the present invention is unitized for each adjacent scraping element, and each unit is welded under strict quality control at the factory, so that high quality welding can be maintained. And since only the welding for connecting the units is performed at the site, and there are few welds at the site, the burden of managing the welding quality after welding is also small, so it is easy to manage the welding quality and the important part is at the factory. Since it has been welded under strict quality control, there is less risk of being operated with defects, and it can be shipped to the site after correcting the welding distortion, ensuring stable operation over a long period of time. be able to.

図１において、１０は汚泥処理用の沈殿池内において組み立てを完了した汚泥掻寄具を示しており、汚泥掻寄具１０は、汚泥処理槽の底面上を図の矢印a1, a2方向に往復移動する。図１には示されないが、汚泥掻寄具１０の図示右側前方に汚泥ピットが設けられ、汚泥掻寄具１０の往復運動により沈殿池底面に堆積した汚泥は汚泥ピットに運ばれる。汚泥掻寄具１０は往復移動方向に間隔をおいた多数の掻寄エレメント１２を備え、各掻寄エレメント１２は汚泥掻寄具１０の往復移動方向に直交する方向において沈殿池の実質的全幅に延びている。そして、掻寄エレメント１２は、凹面状をなし、汚泥ピットに対向した掻き寄せ面（前面）12-1と、前記掻き寄せ面より汚泥ピットから離間方向に沈殿池底面に向けて傾斜する傾斜面（背面）12-2とからなり、掻寄エレメント１２の前進運動（図１の矢印a1）時には汚泥は掻き寄せ面（前面）12-1により汚泥ピットに送られ、掻寄エレメント１２の後退運動（図１の矢印a2）時には、傾斜面（背面）12-2が前回の掻寄運動により掻き寄せられた汚泥を潜り、前回の前進時に掻き寄せた汚泥をその位置に留まらせることにより効率的な掻寄を行うことができる。掻き寄せ面12-1と傾斜面12-2とからなる掻寄エレメント１２の断面形状については図４及び図５等も参照されたい。 In FIG. 1, reference numeral 10 denotes a sludge scraping tool that has been assembled in a sludge treatment basin, and the sludge scraping tool 10 extends in the direction of arrows a 1 and a 2 in the figure on the bottom surface of the sludge treatment tank. Move back and forth. Although not shown in FIG. 1, a sludge pit is provided in front of the right side of the sludge scraping tool 10, and sludge accumulated on the bottom of the sedimentation basin by the reciprocating motion of the sludge scraping tool 10 is carried to the sludge pit. The sludge scraper 10 includes a number of scraping elements 12 spaced in the reciprocating direction, and each scraping element 12 has a substantially full width of the settling basin in a direction perpendicular to the reciprocating direction of the sludge scraper 10. It extends. The scraping element 12 has a concave shape, a scraping surface (front surface) 12-1 facing the sludge pit, and an inclined surface inclined from the scraping surface toward the bottom of the sedimentation basin in a direction away from the sludge pit. (Back) 12-2. When the scraping element 12 moves forward (arrow a 1 in FIG. 1 ), the sludge is sent to the sludge pit by the scraping surface (front) 12-1, and the scraping element 12 moves backward. When exercising (arrow a 2 in Fig. 1), the sloping surface (back) 12-2 sinks the sludge squeezed by the previous scraping motion, and keeps the sludge squeezed by the previous advancement in that position. Efficient scraping can be performed. For the cross-sectional shape of the scraping element 12 composed of the scraping surface 12-1 and the inclined surface 12-2, see also FIG. 4 and FIG.

汚泥掻寄具１０は掻寄エレメント１２の下面にスライド部材１４を溶接固定しており、スライド部材１４は沈殿池の幅方向における中央部及び両側部に長手方向に延設するように設けられる。他方、沈殿池の底面には合成樹脂製のガイドレール１６が沈殿池の中央部及び両側部を長手方向に延設されている。汚泥掻寄具１０のスライド部材１４は沈殿池の底面上の夫々のガイドレール１６上を摺動し、汚泥掻寄具１０の円滑な往復運動が得られるようになっている。また、幅方向に隣接するスライド部材１４間において補強板１７が配置されている。従来は筋交いが設けられていたが、この発明ではユニット構造化するため補強板１７も長手方向に設け、後述の分割構造としている。   The sludge scraping tool 10 has a slide member 14 welded and fixed to the lower surface of the scraping element 12, and the slide member 14 is provided to extend in the longitudinal direction at the center and both sides in the width direction of the settling basin. On the other hand, a synthetic resin guide rail 16 is extended on the bottom surface of the sedimentation basin in the longitudinal direction at the center and both sides of the sedimentation basin. The slide member 14 of the sludge scraping tool 10 slides on each guide rail 16 on the bottom surface of the sedimentation basin so that the smooth reciprocating motion of the sludge scraping tool 10 can be obtained. Further, a reinforcing plate 17 is disposed between the slide members 14 adjacent in the width direction. Conventionally, braces are provided, but in the present invention, a reinforcing plate 17 is also provided in the longitudinal direction to form a unit structure, and a divided structure described later is used.

汚泥掻寄具１０の往復運動を得るため、汚泥掻寄具１０における掻寄エレメント１２の上面にプルロッド１８が位置し、プルロッド１８は沈殿池の幅方向における中央部を長手方向に延設される。特許文献２に記載のようにプルロッド１８は２点鎖線にて概略的に示すリンク機構（プルロッド１８に枢軸１９にて連結される棒状リンク２０と、枢軸２１にて回動自在な三角リンク２２と、棒状リンク２３から成る）とを介してクランク機構付の油圧モータ（図示せず）に連結され、油圧モータのクランク機構からの往復直線運動（矢印ｆ）はリンク２２の往復回転運動（矢印ｇ）に変換され、リンク２２の往復回転運動はプルロッド１８に往復運動として伝達され、汚泥掻寄具１０は沈殿池底面上を矢印a1, a2のように往復摺動する。 In order to obtain the reciprocating motion of the sludge scraping tool 10, the pull rod 18 is located on the upper surface of the scraping element 12 in the sludge scraping tool 10, and the pull rod 18 extends in the longitudinal direction at the center in the width direction of the settling basin. . As described in Patent Document 2, the pull rod 18 is a link mechanism schematically shown by a two-dot chain line (a rod-like link 20 connected to the pull rod 18 by a pivot 19, a triangular link 22 rotatable by a pivot 21, and The reciprocating linear motion (arrow f) from the crank mechanism of the hydraulic motor is connected to the reciprocating rotational motion (arrow g of the link 22 ). The reciprocating motion of the link 22 is transmitted to the pull rod 18 as reciprocating motion, and the sludge scraper 10 reciprocates and slides on the bottom surface of the sedimentation basin as indicated by arrows a 1 and a 2 .

次に、この発明の汚泥掻寄具１０の構造について説明すると、汚泥掻寄具１０は工場で予め組み立てられる４個の汚泥掻寄具ユニット２４（図２参照）を現場にて溶接を主体に連接して構成される（図２は汚泥掻寄具１０に溶接組み立て後の平面図を示す）。各ユニット２４は隣接する複数本の掻寄エレメント１２の溶接主体の組立体として構成される。ユニット２４の構造について更に説明すると、ユニット２４を連接する前の状態を示す図３において、各ユニット２４は隣接する３本の掻寄エレメント１２を備える。汚泥掻寄具１０のユニット化に伴い、組み立て状態では特許文献１及び２では長手方向で１本であったスライド部材１４は長手方向に４つに分割される。１つのユニット２４において、このように分割されたスライド部材１４が幅方向に３本設けられ、掻寄エレメント１２の下面にそのユニット２４に属する３本のスライド部材１４が溶接される構造となっている。また、汚泥掻寄具１０の幅方向の中央部に設けられるプルロッド１８についても長手方向に４分割され、掻寄エレメント１２の上面にそのユニット２４に属する１本のプルロッド１８が溶接される構造となっている。また、補強板１７についても長手方向に４分割され、一つのユニット２４については幅方向に隣接するスライド部材１４間に補強板１７が配置され、掻寄エレメント１２の下面に溶接される構造となっている。一つのユニットにおける構成部品12, 14, 17, 18は全てステンレス鋼を素材としている。   Next, the structure of the sludge scraping tool 10 according to the present invention will be described. The sludge scraping tool 10 is mainly composed of four sludge scraping tool units 24 (see FIG. 2) assembled in advance at the factory. It connects and comprises (FIG. 2 shows the top view after welding assembly to the sludge scraper 10). Each unit 24 is configured as a welding-based assembly of a plurality of adjacent scraping elements 12. The structure of the unit 24 will be further described. In FIG. 3 showing a state before the units 24 are connected, each unit 24 includes three adjacent scraping elements 12. As the sludge scraping tool 10 is unitized, the slide member 14 that is one in the longitudinal direction in Patent Documents 1 and 2 in the assembled state is divided into four in the longitudinal direction. In one unit 24, three slide members 14 divided in this way are provided in the width direction, and the three slide members 14 belonging to the unit 24 are welded to the lower surface of the scraping element 12. Yes. Further, the pull rod 18 provided in the central portion in the width direction of the sludge scraping tool 10 is also divided into four in the longitudinal direction, and one pull rod 18 belonging to the unit 24 is welded to the upper surface of the scraping element 12. It has become. The reinforcing plate 17 is also divided into four parts in the longitudinal direction, and one unit 24 has a structure in which the reinforcing plate 17 is arranged between the slide members 14 adjacent in the width direction and is welded to the lower surface of the scraping element 12. ing. The component parts 12, 14, 17 and 18 in one unit are all made of stainless steel.

１つのユニット２４における溶接構造についてより詳しく説明すると、幅方向の両側については、図４に示すように掻寄エレメント１２はスライド部材１４との溶接のみであり、掻寄エレメント１２の前面12-1及び背面12-2の下端縁12-1A 及び12-2Aに沿って全幅でスライド部材１４と溶接されている。また、補強板１７は幅方向に隣接するスライド部材１４に配置されるため１ユニット２本用いられ、掻寄エレメント１２の下端にスライド部材１４と同様に溶接される。幅方向の中間については、図５に示すように掻寄エレメント１２は下面ではスライド部材１４と上面ではプルロッド１８と溶接される。掻寄エレメント１２とスライド部材１４との溶接については図４と同一方式であり、下端縁12-1A 及び12-2Aに沿って全幅で溶接される。プルロッド１８との溶接については、プルロッド１８の下面に掻寄エレメント１２の上端縁１２Ａが全幅で溶接されるが、これのみでは溶接強度が不足の懸念があるので、補強部材２６が設けられる。補強部材２６は、１ユニット２４の３本の掻寄エレメント１２のうち中間を除いた前後の掻寄エレメント１２につき、前面12-1の側においてプルロッド１８を挟むように直立して設けられ（図６及び図１も参照）、補強部材２６は掻寄エレメント１２、スライド部材１４及びプルロッド１８の当接面に沿って溶接されている。このようにして、３本の掻寄エレメント１２と３本のスライド部材１４と２本の補強板１７と１本のプルロッド１８とからなる溶接構造の１つのユニット２４が完成し、ユニット２４は工場で厳密な溶接品質管理の下で溶接される。従って、溶接箇所が多いに拘わらず溶接品質を維持することができ、溶接欠陥に由来する作動不良の恐れを未然防止することができる。   The welding structure in one unit 24 will be described in more detail. On both sides in the width direction, the scraping element 12 is only welded to the slide member 14 as shown in FIG. And it is welded with the slide member 14 by the full width along lower end edge 12-1A and 12-2A of the back surface 12-2. Further, since the reinforcing plate 17 is disposed on the slide member 14 adjacent in the width direction, two units are used, and are welded to the lower end of the scraping element 12 in the same manner as the slide member 14. In the middle of the width direction, as shown in FIG. 5, the scraping element 12 is welded to the slide member 14 on the lower surface and to the pull rod 18 on the upper surface. The welding of the scraping element 12 and the slide member 14 is the same as that shown in FIG. 4 and is welded in full width along the lower end edges 12-1A and 12-2A. As for welding with the pull rod 18, the upper end edge 12 </ b> A of the scraping element 12 is welded to the lower surface of the pull rod 18, but there is a concern that the welding strength is insufficient with this alone, and therefore a reinforcing member 26 is provided. The reinforcing member 26 is provided upright so as to sandwich the pull rod 18 on the front surface 12-1 side of the front and rear scratching elements 12 except for the middle of the three scratching elements 12 of one unit 24 (see FIG. 6 and FIG. 1), the reinforcing member 26 is welded along the contact surfaces of the scraping element 12, the slide member 14, and the pull rod 18. In this way, one unit 24 having a welded structure composed of the three scraping elements 12, the three slide members 14, the two reinforcing plates 17, and the one pull rod 18 is completed. Welded under strict welding quality control. Therefore, the welding quality can be maintained regardless of the number of welding locations, and the risk of malfunction due to welding defects can be prevented.

次に、このようにして構成されたユニットによる沈殿池の現場での汚泥掻寄具１０の組み立てについて説明すると、この実施形態では４個のユニットにより一つの汚泥掻寄具１０が構成されるが、図７（イ）は一つの汚泥掻寄具１０を構成する４つのユニットのうち最前側の二つのユニット２４とを端同士（補強板１７同士）で当接させた状態を示す。幅方向両側のスライド部材１４間には幾分の隙間Ｓ１が残るが、隙間Ｓ１を介して隣接するスライド部材１４間に図７（ロ）に示すように連結板３０が当てがわれ、連結板３０は全周において対向するスライド部材１４に溶接される。図８は図７のVIII−VIII線に沿った矢視図で、連結板３０により隣接するユニット２４のスライド板１４を連接した状態を側面から示す。尚、スライド部材１４の底面における端縁１４´は面取りされ、スムースなスライドが得られるようになっている。   Next, the assembly of the sludge scraper 10 on the settling pond site by the unit configured as described above will be described. In this embodiment, one sludge scraper 10 is configured by four units. FIG. 7A shows a state in which the two units 24 on the foremost side of the four units constituting one sludge scraping tool 10 are brought into contact with each other at the ends (reinforcing plates 17). Although some gap S1 remains between the slide members 14 on both sides in the width direction, the connecting plate 30 is applied between the adjacent slide members 14 via the gap S1, as shown in FIG. 30 is welded to the slide member 14 which opposes in a perimeter. FIG. 8 is an arrow view taken along the line VIII-VIII in FIG. Note that the edge 14 'on the bottom surface of the slide member 14 is chamfered so that a smooth slide can be obtained.

幅方向の中間のスライド部材１４についていうと、スライド部材１４の間の隙間は図７（イ）にＳ２にて示すように大きくなっており、また、スライド部材１４の端面は図９の１４″にて示すように大きく湾曲されている。即ち、幅方向の中間のスライド部材１４は隣接するユニット間での連接は行われない。他方、幅方向の中間のスライド部材１４の上方にはプルロッド１８が位置しており、プルロッド１８を連接する構造としている。即ち、隣接するユニット２４間でプルロッド１８は図９に示すように端面同士で突き当てられ、図１０に示すように外側より当て板３２が当てられ、ボルト３６が挿通され、ナット３８が締結される。この状態で、当て板３２とプルロッド１８は全周にて溶接され、これにより隣接するユニット間でプルロッド１８が強固に連接される。   Regarding the intermediate slide member 14 in the width direction, the gap between the slide members 14 is large as indicated by S2 in FIG. 7 (a), and the end face of the slide member 14 is 14 ″ in FIG. In other words, the intermediate slide member 14 in the width direction is not connected between adjacent units, while the pull rod 18 is located above the intermediate slide member 14 in the width direction. 9 and is configured to connect the pull rods 18. That is, between the adjacent units 24, the pull rods 18 are abutted against each other as shown in FIG. , The bolt 36 is inserted, and the nut 38 is fastened.In this state, the contact plate 32 and the pull rod 18 are welded all around, thereby pulling between adjacent units. Head 18 is firmly connected.

また、補強板１７については隣接するユニット間に連結板４０（図７（ロ）参照）が上から当てられ、全周で溶接される。必要に応じ、図１１に示すように連結板４０に貫通孔４２を形成し、この部位にも溶肉を埋めることにより連接強度を高めるようにすることができる。   Further, with respect to the reinforcing plate 17, a connecting plate 40 (see FIG. 7B) is applied between adjacent units, and is welded on the entire circumference. If necessary, as shown in FIG. 11, through holes 42 are formed in the connecting plate 40, and the weld strength can be increased also by filling in the melted portions in this portion.

以上のようにこの発明では汚泥掻寄具１０を工場でプレハブ式に製造されるユニット２４を複数個現場で溶接する構造であり、重要な溶接部はユニット２４として工場で厳密な品質管理の下で溶接し、現場で完成ユニット２４より組み立てる方式であるため、現場での溶接管理が楽となり、溶接欠陥が出難いため亀裂等の不具合が生じ難く、また、溶接歪を修正して現地へ出荷できるので、長期の安定作動を確保することができる。 As described above, in the present invention, the sludge scraping tool 10 is structured to weld a plurality of units 24 that are manufactured in a prefabricated manner at the factory, and important welds are unit 24 under the strict quality control at the factory. Because it is a method of welding at the site and assembling from the completed unit 24 at the site, on-site welding management becomes easier, and defects such as cracks are less likely to occur because welding defects are less likely to occur, and welding distortion is corrected and shipped to the site Therefore, long-term stable operation can be ensured.

図１は工場製作の複数ユニットを現場で溶接することにより構成されるこの発明の汚泥掻寄具の斜視図である。FIG. 1 is a perspective view of a sludge scraping tool of the present invention constructed by welding a plurality of units manufactured at a factory. 図２は図１の汚泥掻寄具の平面図である。FIG. 2 is a plan view of the sludge scraping tool of FIG. 図３は組み立て前の４ユニットから成る汚泥掻寄具の平面図である。FIG. 3 is a plan view of a sludge scraping tool comprising four units before assembly. 図４は汚泥掻寄具の１ユニットの側面図（図３のIV−IV方向矢視図）である。FIG. 4 is a side view of one unit of the sludge scraping tool (viewed in the direction of arrows IV-IV in FIG. 3). 図５は汚泥掻寄具の１ユニットの断面図（図３のＶ−Ｖ線に沿った断面図）である。FIG. 5 is a cross-sectional view of one unit of the sludge scraping tool (cross-sectional view taken along the line VV in FIG. 3). 図６は図５のVI−VI線に沿った断面図である。6 is a cross-sectional view taken along line VI-VI in FIG. 図７は隣接するユニットの現場での溶接工程を説明する平面図で、（イ）は溶接前、（ロ）は溶接後を示す。FIGS. 7A and 7B are plan views for explaining the welding process at the site of adjacent units. FIG. 7A shows before welding and FIG. 7B shows after welding. 図８は現場での溶接組み立て中の隣接するユニットの溶接後の側面図（図７のVIII−VIII方向矢視図）である。FIG. 8 is a side view (viewed in the direction of arrows VIII-VIII in FIG. 7) of adjacent units during welding assembly on site after welding. 図９は現場での溶接組み立て中の隣接するユニットの溶接後の側面図（図７のIX−IX線に沿った矢視断面図）である。FIG. 9 is a side view (a cross-sectional view taken along the line IX-IX in FIG. 7) of adjacent units during welding assembly on site after welding. 図１０は図９における隣接するプルロッドの接続部の側面図である。FIG. 10 is a side view of a connecting portion of adjacent pull rods in FIG. 図１１は図７における隣接する補強部材の接続部の部分拡大平面図である。FIG. 11 is a partially enlarged plan view of a connecting portion of adjacent reinforcing members in FIG.

符号の説明Explanation of symbols

１０…汚泥掻寄具
１２…掻寄エレメント
１４…スライド部材
１６…ガイドレール
１７…補強板
１８…プルロッド
２２…リンク
２４…汚泥掻寄具ユニット DESCRIPTION OF SYMBOLS 10 ... Sludge scraper 12 ... Scraping element 14 ... Slide member 16 ... Guide rail 17 ... Reinforcement board 18 ... Pull rod 22 ... Link 24 ... Sludge scraper unit

Claims (3)

汚泥処理槽の底面上を往復移動する汚泥掻寄具であって、
複数の汚泥掻寄具ユニットを接続することにより組み立てられ、
各汚泥掻寄具ユニットは、
往復移動方向に平行に離間して複数配置され、各々が往復移動と実質的に直交する方向に延びる複数の掻寄エレメントと、
汚泥処理槽の幅方向における両側部において汚泥処理槽の底面に対向配置され、汚泥処理槽の底面から離間側において掻寄エレメントに固定され、往復移動方向と平行に延設される第１のスライド部材と、
汚泥処理槽の幅方向における中央部において汚泥処理槽の底面に対向配置され、汚泥処理槽の底面から離間側において掻寄エレメントに固定され、往復移動方向と平行に延設される第２のスライド部材と、
掻寄エレメントを挟んで第２のスライド部材と反対側に位置されかつ第２のスライド部材に一体化されたプルロッドとを備え、
隣接する汚泥掻寄具ユニット間において、第１のスライド部材同士及びプルロッド同士は一連に接続され、かつ
隣接する汚泥掻寄具ユニット間において第２のスライド部材同士は連接されずかつ第２のスライド部材の対向端面に隙間を残している汚泥掻寄具。 A sludge scraping tool that reciprocates on the bottom of the sludge treatment tank,
Assembled by connecting multiple sludge scraper units,
Each sludge scraper unit
A plurality of scraping elements arranged in parallel to and away from the reciprocating direction, each extending in a direction substantially perpendicular to the reciprocating movement;
A first slide that is disposed opposite to the bottom surface of the sludge treatment tank on both sides in the width direction of the sludge treatment tank, is fixed to the scraping element on the side away from the bottom surface of the sludge treatment tank, and extends parallel to the reciprocating movement direction. Members,
A second slide that is disposed opposite to the bottom surface of the sludge treatment tank at the center in the width direction of the sludge treatment tank, is fixed to the scraping element on the side away from the bottom surface of the sludge treatment tank, and extends parallel to the reciprocating movement direction. Members,
A pull rod located on the opposite side of the second slide member across the scraping element and integrated with the second slide member;
Between adjacent sludge scraper units, the first slide members and the pull rods are connected in series, and
A sludge scraping tool in which the second slide members are not connected between adjacent sludge scraping tool units, and a gap is left on the opposing end surface of the second slide member . 請求項１に記載の発明において、第２のスライド部材の端面は汚泥処理槽の底面から離間方向に湾曲している汚泥掻寄具。 2. The sludge scraping tool according to claim 1, wherein the end surface of the second slide member is curved away from the bottom surface of the sludge treatment tank . 請求項１若しくは２に記載の汚泥掻寄具の組立方法であって、汚泥掻寄具を構成する複数のユニットは汚泥掻寄具を装着すべき汚泥処理槽に持ち込まれ、前記複数のユニットは汚泥処理槽において現場合わせにて第１のスライド部材同士及びプルロッド同士の一連接続を行うことにより汚泥掻寄具に組み立てる方法。 The method for assembling a sludge scraping tool according to claim 1 or 2, wherein the plurality of units constituting the sludge scraping tool are brought into a sludge treatment tank to which the sludge scraping tool is to be attached, and the plurality of units are A method of assembling a sludge scraper by performing a series connection of first slide members and pull rods in a sludge treatment tank at the site.
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