JP5108821B2 - Sludge scraper rail structure - Google Patents

Description

  The present invention relates to a rail structure of a sludge scraper installed in a sedimentation basin such as a sewage treatment facility or a water purification treatment facility.

  The thing of patent document 1 is mentioned as a prior art regarding the rail structure of the sludge scraper installed in a sedimentation pond. 5A and 5B are explanatory views of the conventional rail structure shown in the same document. FIG. 5A is a partial front view around the rail viewed from the direction in which the rail extends, and FIG. 5B is a partially enlarged view of FIG. is there.

  Reference numeral 51 denotes a flight plate that is attached to a chain 52 that circulates and scrapes sludge. A sliding contact 53 is attached to the flight plate 51, and the sliding contact 53 is guided by a primary rail 54 fixed to the bottom of the pond so that the flight plate 51 is positioned during movement.

  When the sliding contact 53 is configured to be in direct sliding contact with the primary rail 54, the wear of the both is replaced, and when this is replaced, the sliding contact 53 can be replaced relatively easily. Since it is fixed to the pond bottom, it becomes difficult to replace. Therefore, conventionally, the secondary rail 55 made of a resin material or the like is detachably attached to the upper surface of the primary rail 54, and the sliding contact 53 is brought into sliding contact with the secondary rail 55, thereby facilitating rail replacement. Measures are being taken. As shown in FIG. 5 (b), the head of the bolt 56 for attaching the secondary rail 55 to the primary rail 54 has a counterbore formed in the secondary rail 55 in order to avoid interference with the sliding contact 53. Is located.

Japanese Utility Model Publication No. 6-7804 (FIG. 5)

  However, in the rail structure shown in FIG. 5 (b), the effective thickness as the secondary rail 55 is extra for the depth of the counterbore, that is, the dimension for releasing the head of the bolt 56. It is subject to the restrictions. Further, as the secondary rail 55, it is desirable that a general-purpose belt-like flat plate material can be used as it is. However, in the rail structure of FIG. 5B, a plurality of counterbore holes must be processed, and a long member is required. It takes time and effort to carry out the counterbore processing around the secondary rail 55.

  The present invention was created to solve such a problem, and in attaching a flat secondary rail to a primary rail fixed to the bottom of a sedimentation basin, the secondary rail It is an object of the present invention to provide a rail structure for a sludge scraping machine that is hardly subject to the restrictions on the thickness of the secondary rail and that does not require a processing step for attachment to the secondary rail.

  In order to solve the above problems, the present invention relates to a sludge scraper equipped with a flight plate that is attached to an endless strip and circulates and scrapes the sludge deposited on the bottom of a sedimentation pond. The guide rail structure is composed of a fixed primary rail and a flat secondary rail mounted on the primary rail and in sliding contact with the sliding contact portion of the flight plate, and guides the movement of the flight plate. The guide rails are arranged side by side, and each guide rail is detachably attached to one side of the primary rail so as to cover the end surface and the upper surface around one end of the secondary rail, and the guide rail A removable guide member provided intermittently in the extending direction and the other side of the primary rail continuously in the extending direction of the guide rail so as to cover the end surface and upper surface around the other end of the secondary rail. Fixed guy provided And the secondary rail is loosely fitted in a housing space surrounded by the primary rail, the detachable guide member, and the fixed guide member, and the sliding contact portion abuts on each fixed guide member, thereby the flight plate. The rail structure of the sludge scraping machine is characterized in that the horizontal runout is prevented.

According to the rail structure,
(1) Since the secondary rail is attached to the primary rail in a loose fitting structure, it is not necessary to perform any attachment processing step on the secondary rail itself. Therefore, the strip plate material marketed as a general-purpose product can be used as it is as a secondary rail without being processed, and labor and labor associated with rail replacement can be saved. Since the attachment / detachment guide member is intermittently provided, the size of each attachment / detachment guide member can be small, and the attachment / detachment guide member can be easily handled during attachment / detachment work.
(2) Regarding the effective thickness of the secondary rail, there is no restriction on the relief dimension of the bolt head as in the conventional structure. Therefore, the degree of freedom of selection with respect to the flat plate material of a general-purpose product with a specified thickness specification is widened, and a flat plate material with a thin plate thickness can be used.
Etc. are produced.

  Further, according to the present invention, in a state where the flight plate is not laterally shaken, a separation distance of the fixed guide member with respect to the sliding contact portion is set to be smaller than a separation distance of the detachable guide member, and the flight plate is laterally shaken. When the sliding contact portion of one guide rail comes into contact with the fixed guide member, a distance is formed between the sliding contact portion of the other guide rail and the detachable guide member. .

  According to the rail structure, it is possible to prevent inconvenience that the sliding contact portion jumps out to the detachable guide member side when a lateral vibration occurs when the flight plate is positioned between the detachable guide members provided intermittently.

  According to the present invention, when the flat secondary rail is detachably attached to the primary rail fixed to the bottom of the sedimentation basin, the thickness of the secondary rail is hardly limited. Since a mounting process is not required for the rail, the rail structure is excellent in economy and secondary rail replacement workability.

It is a sectional side view of the sedimentation basin in which the sludge scraper was installed. It is a front sectional view of the rail structure of the sludge scraper according to the present invention. It is a disassembled perspective view of the rail structure of the sludge scraping machine which concerns on this invention. It is a front cross-section action | operation figure of the rail structure of the sludge scraper which concerns on this invention, (a) is the state which the flight board does not shake sideways, (b) shows the state which the flight board swung to the width direction one side. . It is explanatory drawing of the rail structure of the conventional sludge scraping machine.

  In FIG. 1, a flight plate 22 attached to an endless chain (strip) 21 circulates and moves in the longitudinal direction of the sedimentation basin P in the sedimentation basin P and scrapes the sludge deposited on the bottom of the sedimentation basin P. A sludge scraping machine 1 equipped with is installed. A pair of chains 21 are juxtaposed in the width direction of the sedimentation basin P (backward to front side in FIG. 1), and are respectively wound around sprockets 23 installed at a plurality of locations in the sedimentation basin P. The lower path is routed along the bottom of the sedimentation basin P.

  The flight plate 22 is a plate-like member extending in the width direction of the sedimentation basin P, and a plurality of flight plates 22 are attached to the outer peripheral side of the chain 21 at a predetermined interval over a pair of chains 21. The driving sprocket 23 is rotationally driven by a driving source (not shown) and the chain 21 circulates, so that the flight plate 22 positioned in the lower path of the chain 21 scrapes the sludge that has settled on the bottom of the pond. Sludge is accumulated in the pit 24 formed on one end side in the direction.

  The circulating movement of the flight plate 22 is guided by guide rails 25 and 26 installed on the side wall of the sedimentation basin P in the upper path of the chain 21, and installed at the bottom of the sedimentation basin P in the lower path of the chain 21. The guide rail 2 is guided. The present invention relates to the structure of the latter guide rail 2.

  The guide rail 2 is placed on the primary rail 3 that is fixed to the bottom of the pond along the longitudinal direction of the sedimentation basin P, and is placed on the primary rail 3 and is in sliding contact with the sliding contact portion (sliding contact member 27) of the flight plate 22. A pair of flat rails 4 are provided, and as shown in FIG. The slidable contact member 27 is a member fixed to the flight plate 22 with a bolt or the like (not shown) at a position that does not interfere with the slidable contact location, for example.

  In FIG. 2, the primary rail 3 is formed by, for example, welding a long flat plate-like steel plate 5 installed horizontally on the pond bottom and the steel plate 5 in such a manner that the tips of both flanges 6 b are applied to the upper surface of the steel plate 5. It is comprised from the channel steel 6 fixed. As shown in FIG. 3, both sides of the steel plate 5 are formed so as to protrude from the grooved steel 6 at intervals in the longitudinal direction, and the protruding portions are fixed to the pond bottom by anchor bolts 7 or the like. Thereby, the upper surface of the web 6 a of the channel steel 6 constitutes the mounting surface of the secondary rail 4. In addition, concrete C is poured into the groove portion of the primary rail 3 as appropriate.

  The secondary rail 4 is a long plate-like member having a width dimension slightly smaller than the width dimension of the upper surface of the primary rail 3, that is, the length dimension of the web 6a. The material of the secondary rail 4 is, for example, a resin material having a low friction coefficient, but may be a metal such as stainless steel or a ceramic having excellent wear resistance.

  3 and 4, each guide rail 2 is detachably attached to one side of the primary rail 3 so as to cover the end surface 4a and the upper surface 4b around one end of the secondary rail 4. And on the other side of the primary rail 3 so as to cover the detachable guide member 8 provided intermittently in the extending direction of the guide rail 2 and the end surface 4a and the upper surface 4b around the other end of the secondary rail 4, And a fixed guide member 9 provided continuously in the extending direction of the guide rail 2. “To cover end surface 4a and upper surface 4b around one end of secondary rail 4” and “to cover end surface 4a and upper surface 4b around the other end of secondary rail 4” It means to cover the entire end surface 4a including the flange 6b at the side end and a part of the upper surface 4b (end portion in the width direction), and the central region in the width direction of the upper surface 4b slides on the sliding contact member 27. It becomes an exposed part to do. The secondary rail 4 is loosely fitted in a housing space surrounded by the primary rail 3, the detachable guide member 8, and the fixed guide member 9.

  The detachable guide member 8 is a plate-like member having an L-shaped cross section, and the long side plate portion 8a is applied to one side portion of the primary rail 3, that is, one flange 6b of the channel steel 6. The upper plate portion 8b of the short side is spaced from the upper surface of the web 6a so as to form the accommodation space for the secondary rail 4 and extends toward the inside of the rail.

  One flange 6b is provided with mounting holes 11 (FIG. 3) through which a plurality of mounting bolts 10 for the detachable guide member 8 are passed, and the inner surface of the flange 6b is made to correspond to the mounting holes 11. The cap nut 12 is fixed by welding or the like, and the attachment / detachment guide member 8 is fixed to the primary rail 3 by screwing the mounting bolt 10 into the cap nut 12.

  The fixed guide member 9 is also a plate-like member having an L-shaped cross section, for example, and the long side plate portion 9a is applied to the other side portion of the primary rail 3, that is, the other flange 6b of the channel steel 6. The upper plate portion 9b of the short side is spaced from the upper surface of the web 6a so as to form an accommodation space for the secondary rail 4 and extends toward the inside of the rail. The fixed guide member 9 is fixed to the primary rail 3 by welding or the like at the site of the side plate portion 9a. In some cases, the fixed guide member 9 may be fixed to the primary rail 3 by bolt fastening. Note that the fixed guide member 9 does not have to be an integral member over substantially the entire length of the secondary rail 4, and may of course be divided.

  As shown in FIG. 2, in each guide rail 2, the detachable guide member 8 is attached to the flange 6 b on the inner side of the sedimentation basin P, and the fixed guide member 9 is attached to the flange 6 b on the outer side of the sedimentation basin P. On the contrary, in each guide rail 2, the detachable guide member 8 may be attached to the flange 6b on the outer side of the sedimentation basin P, and the fixed guide member 9 may be attached to the flange 6b on the inner side of the sedimentation basin P.

  In a state where the flight plate 22 is not laterally shaken, as shown in FIG. 4A, in each guide rail 2, the separation distance P <b> 1 of the fixed guide member 9 with respect to the sliding contact member 27 is the sliding contact member 27. Is set to be smaller than the separation distance P2 of the attachment / detachment guide member 8 with respect to. The “separation distance” here is, of course, a distance in the width direction of the flight plate 22. Further, when the flight plate 22 swings and the sliding contact member 27 in one guide rail 2 comes into contact with the fixed guide member 9, the space between the sliding contact member 27 and the detachable guide member 8 in the other guide rail 2. It is configured so that the distance is increased.

  As described above, in the secondary rail 4, the end surface 4a and the upper surface 4b around one side end are surrounded by the side plate portion 8a and the upper plate portion 8b of the attachment / detachment guide member 8, and the end surface 4a and the upper surface 4b around the other side end are By being surrounded by the side plate portion 9a and the upper plate portion 9b of the fixed guide member 9, the fixed guide member 9 is mounted on the primary rail 3 while being prevented from moving in the width direction and the upward direction.

  Then, a sliding contact member attached to the flight plate 22 with respect to the upper surface 4b of the secondary rail 4 exposed between the tip of the upper plate portion 8b of the detachable guide member 8 and the tip of the upper plate portion 9b of the fixed guide member 9. 27 is in sliding contact. When the flight plate 22 is caused to sway due to the circulation movement of the flight plate 22, the slidable contact member 27 comes into contact with both the fixed guide members 9 to prevent the side sway.

  Specifically, as shown in FIG. 4B, when the flight plate 22 swings to the left side in the figure, the sliding contact member 27 abuts on the fixed guide member 9 in the left guide rail 2, thereby the flight plate 22. Is controlled to the left. Although not shown, when the flight plate 22 swings to the right side in the drawing, the sliding contact member 27 contacts the fixed guide member 9 in the right guide rail 2, thereby restricting the lateral swing of the flight plate 22 in the right direction. The Since all of the fixed guide members 9 are continuously provided in the extending direction of the guide rail 2, the sliding contact member 27 always comes into contact with the fixed guide member 9.

  Further, as shown in FIG. 4B, when the sliding contact member 27 contacts the fixed guide member 9 in the left guide rail 2, the sliding contact member 27 and the detachable guide member 8 in the right guide rail 2 When there is a space between the sliding contact member 27 and the fixed guide member 9 in the right guide rail 2, the distance between the sliding contact member 27 and the detachable guide member 8 in the left guide rail 2 is increased. Therefore, for example, when the lateral vibration occurs when the flight plate 22 is positioned between the intermittently attached removable guide members 8, the sliding contact member 27 is moved to the removable guide member 8 side. The inconvenience of jumping out is also eliminated.

  When the secondary rail 4 worn by sliding contact with the sliding contact member 27 is replaced, the mounting bolt 10 is removed, the detachable guide member 8 is removed, and the upper surface of the primary rail 3 is pulled out by pulling the secondary rail 4 sideways. Remove from. After the replacement with the new secondary rail 4, the attachment / detachment guide member 8 is fixed with the attachment bolt 10 to complete.

  As described above, each guide rail 2 is detachably attached to one side of the primary rail 3 so as to cover the end surface 4a and the upper surface 4b around one end of the secondary rail 4, and the guide rail 2 The guide rail 2 is extended to the other side of the primary rail 3 so as to cover the detachable guide member 8 provided intermittently in the extending direction and the end surface 4a and the upper surface 4b around the other end of the secondary rail 4. A fixed guide member 9 provided continuously in the installation direction, and the secondary rail 4 is loosely fitted in an accommodation space surrounded by the primary rail 3, the detachable guide member 8, and the fixed guide member 9, If the contact member 27 is in contact with each fixed guide member 9 to prevent the flight plate 22 from sideways, the following effects can be obtained.

  (1) Since the secondary rail 4 is attached to the primary rail 3 with a loose fitting structure, it is not necessary to perform any attachment processing step on the secondary rail 4 itself. Therefore, the strip flat plate material marketed as a general-purpose product can be used as it is as the secondary rail 4 without being processed, and labor and labor associated with rail replacement can be saved. Since the attachment / detachment guide members 9 are provided intermittently, the size of each attachment / detachment guide member 9 is small, and the attachment / detachment guide member 9 can be easily handled during attachment / detachment work.

  (2) With respect to the effective thickness of the secondary rail 4, there is no restriction on the relief dimension of the bolt head as in the conventional structure shown in FIG. Therefore, the degree of freedom of selection with respect to the flat plate material of a general-purpose product with a specified thickness specification is widened, and a flat plate material with a thin plate thickness can be used.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to those described in the drawings, and various design changes can be made without departing from the spirit of the present invention. For example, the primary rail 3 is not limited to the grooved steel as long as the secondary rail 4 can be placed, and the detachable guide member 8 and the fixed guide member 9 are also matched to the side shape of the primary rail 3. Various shapes are possible.

DESCRIPTION OF SYMBOLS 1 Sludge scraper 2 Guide rail 3 Primary rail 4 Secondary rail 8 Detachable guide member 9 Fixed guide member 21 Chain (strip)
22 Flight board 27 Sliding member (sliding portion)
P sedimentation pond

Claims (2)

A sludge scraper equipped with an endless strip that circulates and moves with a flight plate that scrapes the sludge that has settled on the bottom of the sedimentation pond.
A primary rail fixed to the bottom of the pond, and a flat secondary rail mounted on the primary rail and in sliding contact with the sliding contact portion of the flight plate, the guide rail for guiding the movement of the flight plate Structure,
The guide rails are arranged in parallel,
Each guide rail has
A detachable guide member that is detachably attached to one side of the primary rail and intermittently in the extending direction of the guide rail so as to cover an end surface and an upper surface around one side end of the secondary rail;
A fixed guide member continuously provided in the extending direction of the guide rail on the other side of the primary rail so as to cover the end surface and the upper surface around the other end of the secondary rail;
The secondary rail is loosely fitted in a housing space surrounded by the primary rail, the detachable guide member, and the fixed guide member,
A rail structure of a sludge scraping machine, wherein the sliding contact portion abuts against each fixed guide member to prevent the flight plate from sideways. In a state where the flight plate is not shaken, the separation distance of the fixed guide member with respect to the sliding contact portion is set smaller than the separation distance of the detachable guide member,
When the flight plate swings and the sliding contact portion of one guide rail comes into contact with the fixed guide member, a distance is formed between the sliding contact portion of the other guide rail and the detachable guide member. The rail structure of the sludge scraper according to claim 1, wherein

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