JP3746023B2 - Sediment scraping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deposit scraping device that scrapes deposits deposited on the bottom of a tank.
[0002]
[Prior art]
Conventionally, as a scraping device for deposits deposited on the bottom of a tank such as a sedimentation basin, a ladder-like scraping stand in which a plurality of flights (scraping blades) for scraping the deposits are arranged horizontally is arranged at the bottom of the tank. There is known a so-called reciprocating type scraping device that reciprocates with a cylinder.
[0003]
In such a reciprocating type scraping device, when the scraping base is moved forward and the deposit is scraped to one side by flight, the scraping base is moved back and returned to the original position again. Therefore, it is necessary to prevent the flight from returning to the original position after the deposits scraped during the forward movement.
[0004]
Therefore, in the conventional reciprocating type scraping device, the flight is wedge-shaped, and the deposit is scraped to one side at the vertical surface of this flight when the scraping base moves forward, while at the time of backward movement than during the forward movement A wedge-type reciprocating type scraping device that drives the scraping platform in the reverse direction at a high speed to prevent the deposits from returning by allowing the accumulated deposits to get over the slope of the flight. Raise the forward direction side of the gantry from the outside of the tank and tilt the cradle to a downward slope from the forward direction side toward the backward direction side. There is known an inclined reciprocating type scraper that keeps the deposits collected during the flight from returning.
[0005]
[Problems to be solved by the invention]
However, in the wedge-type reciprocating type scraping device, the deposit often does not get over the slope of the flight when the scraping table is moved back, and the deposit often returns or rolls up. Even in the type scraping device, in particular, the flight on the backward movement side of the scraping table often returns or winds up the deposit, and the deposit cannot be scraped efficiently.
[0006]
The present invention has been made in view of the above problems, and provides a deposit scraping device capable of scraping deposits efficiently without causing return of the deposits or winding up. Objective.
[0007]
[Means for Solving the Problems]
  The deposit scraping device of the present invention is a deposit scraping device that moves the scraping blade along the bottom of the tank to scrape the deposit deposited on the bottom of the tank, and scrapes the scraping blade. A scraping blade support means that swings around a horizontal axis orthogonal to the moving direction of the vane, a scraping base on which the raking blade support means is installed, and a reciprocating parallel to the bottom of the tank A driving means for moving, a guided blade provided on the scraping blade or the scraping blade supporting means for supporting the scraping blade, and a reciprocating direction of the scraping stand, and the scraping blade is attached to the horizontal axis. It is possible to move in the forward direction as the first swing position that hangs downward, and guide the guided part so that it can be moved in the backward direction at the position where the scraping blade is swung upward from the first swing position. And guiding means forThere are a plurality of combinations of the scraping blade and the scraping blade support means for supporting the scraping blade, and the plurality of the scraping blade support means are arranged in parallel in the reciprocating direction with respect to the scraping stand.It is characterized by that.
[0008]
According to the deposit scraping device of the present invention, when the scraping base moves forward, the guide means can move in the forward movement direction with the scraping blade hanging down at the first swing position. Sediment is scraped by the scraping blades as it moves.
[0009]
  On the other hand, when the scraping table is moved backward, the guided portion is guided by the guide means so that the scraping blade is swung upward and can be moved in the backward movement direction. The vane is spaced from the bottom of the tank. For this reason, the contact with the scraping blade | wing at the time of a backward movement and the deposit squeezed at the time of a forward movement is prevented reliably.In addition, each scraping blade is swung, and the deposit at the bottom of the tank is shared by the plurality of scraping blades and scraped to the forward movement side, so that the distance of the reciprocating motion of the scraping base can be shortened.
[0010]
Here, it is preferable to include a scraping blade swing restriction member that is installed on the scraping stand and restricts the scraping blade from swinging in the backward movement direction from the first swing position.
[0011]
At the time of forward movement, even if the scraping blade receives a force in the backward movement direction due to deposits or the like, it does not rock in the backward movement direction from the first rocking position, so the deposit is reliably scraped. .
[0012]
In addition, the guide means is a guide for guiding the guided portion movably moved in the reciprocating direction while the opening portion through which the guided portion can advance and retreat is formed on the lower surface at a predetermined distance in the reciprocating direction. A body, a first swinging member that extends downward from the edge of the opening in the backward direction of the opening and is pivotally supported so as to be swingable in the vertical direction, and a first swinging member. When the scraping blade located at the moving position moves forward, the lower surface of the first swinging member comes into contact with the guided portion, and when the scraping blade located at the first swinging position moves backward, the guided portion Is in contact with the upper surface of the first rocking member, and the first rocking member is positioned below the first rocking member so that the guided portion can be guided to the guide body through the opening. It is preferable to include a first swing limiting member that limits swinging to the side.
[0013]
Thereby, when the guided portion of the scraping blade that has been set to the first swing position moves forward and reaches below the opening, the guided portion of the scraping blade contacts the first swing member, Since the first swinging member swings upward and escapes, the movement of the scraping blade is not hindered, and the scraping blade reaches ahead of the opening, and the deposit is further scraped to a predetermined position.
[0014]
On the other hand, when the guided portion of the scraping blade that is in the first swing position reaches the lower side of the previous opening during the backward movement of the scraping base, the first swing member is covered by the scraping blade. The guide portion is received on the first swing member, and the first swing member is restricted from swinging downward by the first swing limit member. Since it guides to a guide body through an opening part, a scraping blade is rock | fluctuated upwards centering on a horizontal axis, and a scraping blade is spaced apart from the bottom part of a tank. Furthermore, when the guided portion passes under the guide body through the adjacent opening, the scraping blades hang down again to the first swing position, and the deposits are moved by moving the scraping stand forward. It is raked again by the scraping blade.
[0015]
That is, the deposit scraping device of the present invention is suitably realized by providing such guide means.
[0016]
Here, it is preferable to include first biasing means for biasing the first swing member downward.
[0017]
As a result, the first swing member is reliably maintained in the predetermined posture limited by the first swing limit member unless an external force or the like is applied, so that the guided portion of the scraping blade is guided during the backward movement. Guidance to the body is performed more reliably.
[0018]
Further, the guide body extends from the edge of the opening in the forward movement direction to the upper side of the opening and is pivotally supported so as to be swingable in the vertical direction, and the opening can be covered from above. When the scraping blade moves backward with the two swinging members, the second biasing means for biasing the second swinging member upward, and the guided portion of the scraping blade guided by the guide body When the upper surface of the second oscillating member is in contact with the guided portion of the scraping blade and the guided portion of the scraping blade is guided by the guide body, The guided portion abuts the lower surface of the second oscillating member, and the guided portion can be guided to the lower side of the guiding body through the opening, and the second oscillating member swings further upward. It is preferable to include a second rocking restriction member for restricting the movement.
[0019]
Accordingly, when the guided portion of the scraping blade moves back in the state where the guided portion of the scraping blade is guided by the guide body, if the guided portion of the scraping blade reaches above the opening of the guiding body, the guided body The portion abuts on the second swing member, and the second swing member swings downward to cover the opening and a guide path is formed on the opening, so that the guided portion goes downward from the opening. Without passing through this opening, it reaches the backward direction side. Then, after passing through the guided portion, the second rocking member returns to a predetermined rocking position restricted by the second rocking restriction member by being biased by the second biasing means. Further, when the guided portion of the scraping blade moves forward with the guided portion of the scraping blade guided by the guide body and the guided portion of the scraping blade guided by the guiding body reaches the opening, the guided portion is It is guided gradually downward through the opening along the upper surface of the first swing member, and the scraping blade is smoothly returned to the first swing position.
[0020]
In addition, at this time, the second swinging member whose upward swinging is restricted by the second swinging restricting member closes the entrance to the guide body on the forward direction side from the opening, and the second swinging member Since the guided portion can be guided below the guide body through the opening along the lower surface of the member, the guided portion is again guided to the guide body on the forward movement side from the opening. It can be taken out from the opening without any problem, and the scraping blade can be reliably returned to the first swing position.
[0021]
  Moreover, it is preferable that the guided part is provided for each combination.
[0022]
  Further, the guided portion may be provided for at least one of the combinations, and may include connecting means for interlocking the swinging motions of the scraping blades.
[0023]
  According to this, the scraping blade according to the combination in which the guided portion is provided is swung by the guide means, and the scraping blade in the combination in which the guided portion is not provided in conjunction with this is also connected. Is swung by. In addition, since the number of guided portions can be reduced as compared with the number of combinations, the configuration of the guide means is not complicated, and the cost can be kept low.
[0024]
The driving means includes a gear that is rotated forward and backward about an axis perpendicular to the reciprocating direction of the scraping table, a gear that extends in the reciprocating direction of the scratching table and is fixed to the scratching table so as not to be bent. It is preferable to include a meshing member capable of meshing. According to this, the scraper can be reciprocated easily and suitably.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a deposit scraping apparatus according to the invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.
[0026]
FIG. 1 is a schematic front view showing a deposit scratching apparatus according to the first embodiment, and FIG. 2 is a schematic side view showing the deposit scratching apparatus according to the first embodiment.
[0027]
As shown in FIG. 1, the deposit scraping apparatus 1 of the present embodiment scrapes deposits such as sludge accumulated on the bottom surface 10b of the tank 10 toward the sludge pit 10a. A ladder-like scraping base 20 in which a plurality of scraping flights (scraping blades) 12 are arranged in the horizontal direction, and a driving device that reciprocates the scraping base 20 substantially parallel to the bottom surface 10b of the tank 10 ( Drive means) 50.
[0028]
As shown in FIG. 1 and FIG. 2, the scraper base 20 has two parallel drive direction members 21 extending in the reciprocating direction of the scraper base 20, and the two drive direction members 21. And a plurality of parallel members 22 arranged perpendicularly to each other and spaced apart from each other by a predetermined distance. As shown in FIG. 3, the parallel member 22 and the driving direction member 21 are formed by screwing a coupling plate 22 a fixed to the parallel member 22 and a coupling plate 21 a fixed to the driving direction member 21. Connected and has a ladder shape.
[0029]
At both ends of the parallel member 22, main rollers 24 that are rotatable around the axis of the parallel member 22 are respectively installed. Further, the parallel member 22 includes two arms (scraping blade support means) 25 that are swingable around the axis of the parallel member 22 and spaced apart in the axial direction of the parallel member 22. As shown in FIGS. 3 and 4, the above-described coupling plate 22 a is moved from the first swing position where the arm 25 hangs vertically below the parallel member 22 to the return side (right side in FIG. 4). Arm stopper (scraping blade swing limiting member) 26 as a projection for limiting the swing of the blade.
[0030]
As shown in FIGS. 1 and 2, a flight (scraping blade) that extends in the axial direction of the parallel member 22 and scrapes the deposit accumulated on the bottom surface 10 b of the tank 10 at the tip of each arm 25. 12 is installed.
[0031]
Further, as shown in FIG. 3, the arm 25 has a bar 23 that protrudes toward the outer side in the axial direction of the parallel member 22 to substantially the same position as the main rollers 24 at both ends of the parallel member 22, as shown in FIG. And a sub-roller (guided portion) 27 that can be rotated around the axis of the bar 23. The sub roller 27 may be provided in the flight 12 via a bar or the like.
[0032]
As shown in FIG. 1, the driving device 50 includes a motor 51 that can rotate in forward and reverse directions, a chain 52 that transmits a driving force by the motor 51, and a horizontal reciprocating motion of the driving force transmitted by the chain 52. And a chain 53 for transmitting the converted driving force to the driving direction member 21 through the fixing plate 55 and a tighter 54 for adjusting the slack of the chain 53, and the like. Reciprocate left and right.
[0033]
Further, as shown in FIGS. 2 and 3, the driving device 50 includes a bowl-shaped main guide rail 82 having a rectangular cross section on a pair of side walls 10 c parallel to the reciprocating direction of the scraping base 20 in the tank 10. ing. The main guide rail 82 is installed in parallel with the bottom surface 10b of the tank 10 so that the opening side of the basket faces the side of the cradle 20 and the main rollers 24 at both ends of the parallel member 22 of the cradle 20 Is always accommodated in the main guide rail 82. As shown in FIGS. 3 and 4, the height of the main guide rail 82 from the bottom surface 10 b is such that the lower end of the flight 12 is substantially in the tank when the arm 25 of the scraper 20 is in the first swing position. The height is such that it reaches the bottom surface 10 b of 10. The main guide rail 82 guides the scraper 20 driven by the chain 53 and the like to reciprocate in parallel with the bottom surface 10 b of the tank 10.
[0034]
Here, the scraping device 1 of the present embodiment includes a guide unit (guide means) 80 that adjusts the height of the flight 12 in accordance with the moving direction of the scraping base 20. The guide unit 80 includes a saddle-shaped sub guide rail (guide body) 83 having a rectangular cross section, similar to the main guide rail 82, below the main guide rail 82 on the side wall 10 c. The height of the sub guide rail 83 from the bottom surface 10b is higher than the position of the sub roller 27 when the arm 25 is set to the first swing position, and the sub roller 27 of the arm 25 of the stroking base 20 is moved. It is accommodated in the groove (imaginary line in FIG. 3) and can be guided.
[0035]
As shown in FIGS. 1 and 4, the sub-roller 27 is advanced and retracted between the sub-guide rail 83 and the outside (downward) of the sub-guide rail 83 on the lower flange 83 a of the lower surface of the sub-guide rail 83. A possible opening 84 is formed. A plurality of the openings 84 are formed in the reciprocation direction, one more than the number of the parallel members 22 at the same interval as the horizontal installation interval of the parallel members 22 of the scraper 20.
[0036]
Further, as shown in FIG. 4, the guide unit 80 has an opening at the lower flange 83a of the sub guide rail 83 at the backward direction side of the opening 84, that is, near the edge far from the sludge pit 10a. A plate-like lower guide flap (first swing member) 85 extending downward from the portion 84 is provided. The lower guide flap 85 has a size corresponding to the opening 84 and is pivotally supported by a shaft 90 below the edge far from the sludge pit 10a so as to be swingable in the vertical direction.
[0037]
Further, the guide unit 80 is provided with a stopper (first swing restricting member) 86 for restricting the lower guide flap 85 from swinging downward beyond a predetermined angle from the horizontal position on the lower flange 83a. And a tension spring (first urging means) 87 for urging the lower guide flap 85 downward. The lower guide flap 85 is normally moved downward unless it receives external force from the auxiliary roller 27 or the like. On the other hand, the swinging is stopped by the stopper 86.
[0038]
Here, as the predetermined angle, when the scraping base 20 moves backward (moves in the right direction in the drawing) in a state where the arm 25 is in the first swing position where the arm 25 hangs down below the parallel member 22, The auxiliary roller 27 can contact the upper surface of the lower guide flap 85. Further, as shown in FIG. 5, the scraper 20 is moved forward in a state where the arm 25 is at the first swing position (see FIG. 5). As shown in FIG. 6, the sub-roller 27 of the arm 25 is set to an angle that makes contact with the lower surface of the lower guide flap 85.
[0039]
As shown in FIG. 4, the lower guide flap 85 is set at a predetermined angle, and the sub roller 27 of the arm 25 set at the first swing position returns below the sub guide rail 83. When moving, as shown in FIG. 7, the secondary roller 27 is received on its upper surface and guided obliquely upward and guided into the secondary guide rail 83 through the opening 84, and conversely, the secondary guide rail 83. When the sub-roller 27 guided above moves forward from the right side of the opening 84 in the drawing, the sub-roller 27 is received on the upper surface and guided obliquely downward, and the sub-roller 27 is guided from the sub-guide rail 83 through the opening 84. Guide out of the guide rail 83.
[0040]
Further, referring back to FIG. 4, the lower flange 83a of the sub guide rail 83 extends upward from the opening 84 on the forward side of the opening 84, that is, near the edge near the sludge pit 10a. An existing upper guide flap (second swing member) 88 is provided.
[0041]
The upper guide flap 88 is sized to cover the opening 84 and is pivotally supported by a shaft 91 so as to swing up and down below the forward edge of the lower flange 83a. ing. Further, the upper guide flap 88 is urged upward by a compression spring (second urging means) 89, and the upper guide flap 88 normally swings upward when no external force is applied to the sub guide rail. The upper flange 83 (second swing restricting member) 83b is in contact with the upper flange 83b and is restricted so as not to swing further upward. When the upper guide flap 88 swings downward, the upper guide flap 88 comes into contact with the lower flange 83a of the edge of the opening 84 when it is in a horizontal state covering all of the opening 84, and further downwards. Oscillation is limited.
[0042]
As shown in FIG. 8, the upper guide flap 88 is moved backward from the sludge pit 10a side in the state where the sub roller 27 of the arm 25 is guided in the sub guide rail 83 from the left side of the opening 84 in the figure (illustrated). (When moving to the right), the sub-roller 27 comes into contact with the sub-roller 27 and is pushed by the reverse sub-roller 27 and swung downward to cover the opening 84 as shown in FIG. 27 is allowed to pass over the opening 84, and as shown in FIG. 10, the sub-roller 27 reaches the sub-guide rail 83 on the backward movement side from the opening 84. Conversely, when the sub roller 27 of the arm 25 is guided in the sub guide rail 83 and moves forward (moves in the left direction in the drawing) from the right side of the opening 84 as shown in FIG. The sub-roller 27 serves as a lid for blocking the guide path so that the sub-roller 27 does not jump over the opening 84 and enter the forward direction of the sub-guide rail 83 again. The auxiliary roller 27 is guided below the auxiliary guide rail 83 via the.
[0043]
Next, the operation of the deposit scraping device 1 will be described.
[0044]
First, as shown in FIG. 4, the arm 25 of the cradle base 20 is located at the first swing position, and the sub roller 27 is located outside (below) the sub guide rail 83. The flight 12 will be described from the state where the sediment deposited on the bottom of the tank 10 can be scraped.
[0045]
First, from this state, the motor 51 is rotated in the clockwise direction in FIG. 1, and the scraper 20 is moved in the direction of the white arrow (left side in the figure), that is, in the direction of the sludge pit 10a by the chains 52 and 53 (forward movement). . As a result, the deposits are scraped toward the sludge pit 10a by each flight 12, and the deposits are sent into the sludge pit 10a (see FIG. 4).
[0046]
When the flight 12 scrapes the deposit, the arm 25 receives a counterclockwise moment from the deposit or the like, but the arm stopper 26 prevents the arm 25 from further swinging counterclockwise in the drawing. Therefore, it is possible to surely deposit the deposit.
[0047]
If such scraping is continued, as shown in FIG. 5, the arm 25 and the like reach the vicinity of the adjacent opening 84 on the forward direction side. At this time, the auxiliary roller 27 of the arm 25 contacts the lower surface of the lower guide flap 85, but the lower guide flap 85 can swing upward about the shaft 90, so as shown in FIG. Further, the arm 25 swings upward, and the arm 25 passes under the opening 84 without any obstacle, and continues to scrape the deposit toward the sludge pit 10a.
[0048]
Since the lower guide flap 85 is biased downward by the tension spring 87 after the sub roller 27 has passed, it immediately swings downward and reliably returns to the original predetermined position.
[0049]
In this way, after passing under the opening 84 and being in the state as shown in FIG. 4, this time, the motor 51 shown in FIG. 1 is rotated counterclockwise, and the scraper 20 is moved in the direction of the black arrow. The moving is started, and the return movement for returning the scraping base 20 to the original position is started.
[0050]
Then, the arm 25 and the like reach the opening 84 again. As shown in FIG. 7, the sub-roller 27 of the arm 25 comes into contact with the upper surface of the lower guide flap 85, and this lower guide flap. 85, since further downward swing is restricted by the stopper 86, the auxiliary roller 27 guides to the upper surface of the lower guide flap 85 as the scraping base 20 moves backward in the figure. Then, it rises and enters the sub guide rail 83 through the opening 84.
[0051]
Then, when the scraper 20 further moves back in the right direction in the figure, as shown in FIG. 10, the sub roller 27 of the arm 25 travels in the sub guide rail 83 and moves back in the right direction in the figure as it is. The movement toward the opening 84 adjacent to the backward movement direction is continued.
[0052]
At this time, the arm 25 is inclined clockwise toward the sludge pit 10a with respect to the first vertically downward swinging position, and the flight 12 is lifted with a predetermined distance from the bottom of the tank 10. Therefore, in the subsequent backward movement of the cradle 20 in the right direction in the figure, the deposit does not come into contact with the deposit that has been scraped during the forward movement and is not returned to the sludge pit 10a. At this time, the flight 12 is gradually pulled out almost vertically upward from the deposit, so that the deposit is also prevented from being rolled up.
[0053]
In this way, the sub roller 27 travels in the sub guide rail 83, reaches the upper guide flap 88 of the adjacent opening 84, and travels further in the backward movement direction (see FIG. 8). At this time, the sub roller 27 comes into contact with the upper surface of the upper guide flap 88, and as shown in FIG. 9, the upper guide flap 88 can swing downward, so that it receives the force from the sub roller 27 and swings downward. In addition, a passage ahead of this is formed covering the opening 84, and the sub roller 27 passes over the opening 84 without exiting downward from the opening 84. After the sub-roller 27 has passed, the upper guide flap 88 is biased by the compression spring 89, so that it swings upward again and stops in contact with the upper flange 83b as shown in FIG. Return to the state.
[0054]
Then, after passing through the opening 84 for a while, the motor 51 is rotated again clockwise as shown in FIG. 1 to start the forward movement of the scraping base 20 toward the sludge pit 10a.
[0055]
Then, the sub roller 27 in the sub guide rail 83 reaches the opening 84. At this time, as shown in FIG. 7, the auxiliary roller 27 is gradually guided out of the auxiliary guide rail 83 through the opening 84 along the slope formed by the upper surface of the lower guide flap 85. As shown in FIG. 4, the arm 25 returns to the first vertically downward swinging position, and the deposit can be scraped again.
[0056]
Thus, in a series of operations in which the sub-roller 27 goes out of the sub-guide rail 83, the upper guide flap 88 covers the opening 84 when returning, and the sub-roller 27 once passes over the opening 84. Since the secondary roller 27 reaches the backward direction side (right side in the figure) from the opening 84 and then gradually moves out of the secondary guide rail 83 by the slope formed by the upper surface of the lower guide flap 85 during the subsequent forward movement. The arm 25 is smoothly returned to the first swing position. For this reason, since the flight 12 enters the deposit gradually and smoothly, the winding up of the deposit is further suppressed.
[0057]
Further, as shown in FIG. 7, when the auxiliary roller 27 in the auxiliary guide rail 83 moves forward and reaches the opening 84 and is guided downward, the amount of sediment deposited is large. Even when the arm 25 is difficult to return to the first swing position only by gravity, the entrance to the forward direction side of the opening 84 of the sub guide rail 83 is closed by the upper guide flap 88 so that the sub roller 27 enters. Since the auxiliary roller 27 is guided below the auxiliary guide rail 83 by the lower surface side of the upper guide flap 88, the auxiliary roller 27 of the arm 25 jumps over the opening 84 and enters the auxiliary guide rail 83 again. Without entering, it is reliably guided downward from the sub guide rail 83. Thus, when the scraper 20 is moved forward in the direction of the sludge pit 10a, the arm 25 is more reliably returned to the first swing position, and the flight 12 remains without being separated from the bottom surface. Scraping is possible.
[0058]
Then, by repeating such a series of forward and backward movements, the sediment deposited on the bottom surface 10b of the tank 10 is prevented from returning or rolling up in the reverse direction and efficiently scraped to the sludge pit 10a. It is possible. In addition, since a plurality of flights 12 are provided, and each flight 12 is swung by this series of operations, the deposit is shared by the plurality of flights 12 and is scraped to the forward movement side. The distance of the reciprocating motion of the scraping base 20 is shorter than that in the case of performing the shifting.
[0059]
In addition, the scraping device 1 of the deposit according to the present embodiment has less rotating power and sliding portion than the chain flight type scraping device, so that less power is required. There are few wear members such as sprockets and shoes, the structure is simple, and the cost can be reduced. Further, the scraping device 1 for deposits can easily clean sludge pits and the like, and can easily install an inclined plate for increasing the efficiency of chemical precipitation in a tank for waterworks, etc. There is a feature that the position of the drive unit can be set freely without being restricted by the installation location such as a pipe schema, and can be easily installed at a small number of hanging points in an existing tank casing.
[0060]
Next, the deposit scraping apparatus 2 according to the second embodiment will be described.
[0061]
The first point that the scraping device 2 of the present embodiment differs from the scraping device 1 of the first embodiment is that the drive device 50 is connected via a chain 52 or the like as shown in FIGS. A sprocket (gear) 103 that receives the rotational driving force from the motor 51 and rotates forward and backward about a horizontal axis perpendicular to the reciprocating direction of the scraping base 20, and a driving direction member 21 as shown in FIGS. And a chain (meshing member) 101 that is fixed in a non-bendable manner via a fixing member 102 and extends in the reciprocating direction of the stroking base 20 and meshes with the sprocket 103.
[0062]
According to this, according to the forward / reverse rotation of the sprocket 103, the scraping base 20 is suitably reciprocated in the extending direction of the driving direction member 21 by the chain 101 meshing with the sprocket 103, and is deposited as in the above embodiment. Things are scraped. In particular, in this embodiment, the chain 53 in the first embodiment is not necessary, and problems such as chain slippage can be reduced, and the reliability of the scraping device 2 can be improved, and the play of the chain 53 is adjusted. This eliminates the need for the tighter 54, thereby reducing the cost. In addition, the drive system as in the present embodiment is called a pin gear system, which does not require much precision such as installation of the cradle 20 and the chain 101, and is easy to install and maintain, and is a contaminant such as deposits. It is also suitable for driving in water containing water. In some cases, a so-called rack and pinion system may be used in which a pinion gear is used instead of the sprocket 103 and a rack is used instead of the chain 101.
[0063]
Further, the second point that the scraping device 2 of the present embodiment is different from the scraping device 1 of the first embodiment is that the adjacent three arms 25 interlock the swinging motions of these arms 25. Accordingly, the auxiliary roller 27 is provided only on one of the arms 25 connected to each other by the connecting member 110, and the lower guide of the guide unit 80 is correspondingly provided. The remaining flaps 85, upper guide flaps 88 and the like that do not contribute to the guidance of the remaining sub-rollers 27 are removed. Here, for convenience, the combination of the arm 25 having the sub-roller 27 and the flight 12 supported by the arm 25 having the sub-roller 27 is referred to as the main driving unit 100, and the arm 25 and the sub-roller 27 not having the sub-roller 27 are called. A combination with the flight 12 supported by the arm 25 that does not have the following is called a driven portion 105.
[0064]
The connecting member 110 extends in the axial direction of the driving direction member 21, and is connected to the arm 25 of the main driving unit 100 and the two arms 25 of the driven unit 105 so as to be rotatable by pins 111. The connecting member 110 may be connected to the flight 12 instead of the arm 25. Further, the number of driven parts 105 connected to each other and the number of main driving parts 100 are not limited as long as they are one or more.
[0065]
According to this, since the swinging motion of the flight 12 of the driven portion 105 is interlocked with the swinging motion of the flight 12 of the main driving portion 100, deposits are also scraped by the flight 12 of the driven portion 105. Here, the guide unit 80 only needs to guide the sub-roller 27 of the main driving unit 100, and the guide unit 80 is lower than the guide unit 80 corresponding to the sub-roller of the driven unit 105 as compared with the scraping device 1 of the first embodiment. The number of the side guide flaps 85 and the upper guide flaps 88 can be reduced, and the cost and simplification of the guide unit 80 can be reduced.
[0066]
In addition, the scraping apparatus according to the present invention is not limited to the above-described embodiment, and can be variously modified.
[0067]
For example, in the above embodiment, the arm 25 is reliably returned to the first swing position during the forward movement, and the upper guide flap 88 is provided so that the flight 12 gradually and smoothly enters the deposit during the return. Although it is provided, it may not be provided if the amount of accumulated sludge is small. Even in this case, the arm 25 tends to return to the first swinging position by gravity, so that the sub roller 27 that has reached the opening 84 during the forward movement is guided onto the lower guide flap 85 and outside the sub guide rail 83. Be guided to.
[0068]
In the above embodiment, the tension spring 87 that biases the lower guide flap 85 downward is provided. However, the lower guide flap 85 is biased downward by the weight of the lower guide flap 85. It doesn't matter.
[0069]
Similarly, although the upper guide flap 88 includes the compression spring 89, the upper guide flap 88 may be urged upward by simply the weight of the counterweight provided at the position of the compression spring 89.
[0070]
Moreover, although the scraping apparatus 1 of the said embodiment is equipped with the sub guide rail 83, the lower side guide flap 85, and the stopper 86 as a guide means, it is not restricted to this, It extends in the reciprocating direction of the scraping stand 20. In the forward movement, the flight 12 can be moved as the first swing position, and in the backward movement, the guided portion such as the auxiliary roller 27 can be moved at a position where the flight 12 is swung upward from the first swing position. Anything that guides you.
[0071]
Moreover, although the scraping apparatus 1 of the said embodiment scrapes the sludge which settles in the tank 10, if it is the deposit deposited on the bottom part of a tank, it will not be restricted to this, For example, powder etc. may be sufficient.
[0072]
【The invention's effect】
According to the deposit scraping device of the present invention, when the scraping base moves forward, the guide means can move in the forward movement direction with the scraping blade hanging down at the first swing position. Sediment is scraped by the scraping blades as it moves.
[0073]
On the other hand, when the scraping base is moved backward, the guide means guides the guided portion so that the scraping blade is swung upward and can move in the backward moving direction. The vane is spaced from the bottom of the tank. For this reason, the contact with the scraping blade | wing at the time of a backward movement and the deposit squeezed at the time of a forward movement is prevented reliably.
[0074]
Thus, a deposit scraping device is provided that can scrape the deposit efficiently without causing return of the deposit or winding up.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a scraping device according to a first embodiment.
FIG. 2 is a schematic side view of the scraping device of FIG. 1;
FIG. 3 is an enlarged view of a portion A in FIG.
4 is a schematic view showing a state in which the sub roller is positioned below the sub guide rail in the vicinity of the opening in FIG. 1. FIG.
5 is a schematic view showing a state in which the sub roller has advanced in the forward movement direction and has reached the vicinity of the adjacent opening from the state of FIG. 4;
6 is a schematic diagram showing a state in which the sub roller has advanced in the forward movement direction and has reached the lower part of the opening from the state of FIG. 5;
FIG. 7 is a schematic view showing a state in which the auxiliary roller has reached the upper surface of the lower guide flap.
FIG. 8 is a schematic view showing a state in which a sub roller is positioned in a sub guide rail.
9 is a schematic diagram showing a state in which the sub roller advances in the backward movement direction and passes over the upper guide flap from the state of FIG. 8. FIG.
10 is a schematic diagram showing a state in which the sub roller has advanced in the backward movement direction from the state of FIG.
FIG. 11 is a schematic front view of the scraping device according to the second embodiment.
12 is a schematic side view of the scraping device of FIG. 11. FIG.
13 is an enlarged view of a portion B in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Scraping apparatus of a deposit, 10 ... Tank, 12 ... Flight (scratching blade), 20 ... Scraping stand, 25 ... Arm (scraping blade support means), 26 ... Arm stopper (Scratching blade rocking | fluctuation restriction | limiting) Members), 27 ... sub-roller (guided portion), 50 ... drive device (drive means), 80 ... guide unit (guide means), 83 ... sub-guide rail (guide body), 83b ... upper flange (second swing) Limiting member) 84 ... opening, 85 ... lower guide flap (first swinging member), 86 ... stopper (first swinging limiting member), 87 ... tension spring (first biasing means), 88 ... upper guide Flap (second swing member), 89 ... compression spring (second biasing means), 101 ... chain (meshing member), 103 ... sprocket (gear), 110 ... connecting member.

Claims (8)

A scraping device for deposits that moves the scraping blade along the bottom of the tank and scrapes the deposits deposited on the bottom of the tank,
Scraping blade support means for swingably supporting the scraping blade around a horizontal axis perpendicular to the moving direction of the scraping blade;
A scraping stand on which the scraping blade support means is installed;
Drive means for reciprocating the scraper in parallel with the bottom of the tank;
A guided portion provided on the scraping blade or the scraping blade support means;
The scraping blade extends in the reciprocating direction of the scraping base, and the scraping blade is movable in the forward movement direction as a first swinging position that hangs down below the horizontal axis, and the scraping blade is moved in the first swinging position. A guide means for guiding the guided portion so as to be movable in the backward movement direction at a position swung upward from the moving position ;
The raking blade and has a plurality of combination of the raking blade supporting means for supporting said raking blades, the raking blade support means is a plurality juxtaposed in the reciprocating direction with respect to the raking frame Rukoto A scraping device for deposits. A scraping blade swing limiting member that is installed on the scraping stand and limits the swinging blade from swinging backward from the first swing position. The deposit scraping apparatus according to 1. The guide means is formed such that an opening portion through which the guided portion can advance and retreat is formed on the lower surface at a predetermined distance in the reciprocating direction, and the guided portion entering through the opening portion is movable in the reciprocating direction. A guide to guide to,
A first oscillating member that extends downward from the edge of the opening in the guide body toward the lower side of the opening and is pivotally supported so as to be swingable in the vertical direction;
When the scraping blade located at the first swing position moves forward, the lower surface of the first swing member abuts on the guided portion and the scraping blade positioned at the first swing position In the backward movement, the guided portion is in contact with the upper surface of the first swing member, and the guide member is guided to the guide body through the opening. A first swing restricting member for restricting further downward swing of the first swing member;
The scraping apparatus for deposits according to claim 1 or 2, characterized by comprising: 4. The deposit scraping device according to claim 3, further comprising first biasing means for biasing the first swinging member downward. The guide body extends from the edge of the opening in the forward movement direction to the upper side of the opening and is pivotally supported so as to be swingable in the vertical direction, and can cover the opening from above. A second rocking member;
Second urging means for urging the second swinging member upward;
When the scraping blade moves backward in a state where the guided portion is guided by the guide body, the upper surface of the second swinging member comes into contact with the guided portion, and the guided portion is brought into contact with the guide body. When the scraping blade moves forward in a guided state, the guided portion comes into contact with the lower surface of the second swinging member, and the guided portion can be guided below the guide body through the opening. A second swing limiting member that limits the upward swing of the second swing member,
The scraping device for deposits according to claim 3 or 4, characterized by comprising:   The deposited scraping apparatus according to claim 1, wherein the guided portion is provided for each of the combinations.   The said guided part is provided with respect to at least one of the said combinations, and is provided with the connection means which mutually interlock | cooperates the rocking | fluctuation operation | movement of the said scraping blade | wing. The deposit scraping device according to claim 1. The driving means includes a gear that is rotated forward and backward about an axis perpendicular to the reciprocating direction of the scraping table, and extends in the reciprocating direction of the scraping table, and is fixed to the scratching table so that it cannot be bent. The deposit scraping device according to any one of claims 1 to 7, further comprising a meshing member that can mesh with the gear.

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