JP4834717B2 - Dust remover - Google Patents

Description

  The present invention relates to a dust remover, and more particularly to a dust remover that scrapes and removes dust flowing in a water channel or the like with a rake.

  Dust removers are installed on the entrance side of river intakes, intake channels, sewer pump stations, etc. to prevent the flow of fallen leaves, tree branches, driftwood, etc., as well as household waste. .

  An example of a conventional dust remover is shown in FIG. The dust remover 100 includes a screen 101 and an apron 102 that are installed so as to block the running water F in the water channel 2 and are inclined with respect to the running water F, an endless chain 103 installed so as to go around these sides, A plurality of rakes 104 attached to the endless chain 103 at predetermined intervals, a drive sprocket 105 for rotating the endless chain 103, a plurality of support beams 106 for supporting the screen 101 and the endless chain 103 from the back, and a frame 107 for supporting the whole And a belt conveyor 109 installed below the drive sprocket 105, and a chute 110 installed between the drive sprocket 105 and the belt conveyor 109.

In the dust remover 100, the endless chain 103 rotates when the drive sprocket 105 rotates in the clockwise direction shown in the figure, and the rake 104 orbits the screen 101 and the apron 102 in the direction of arrow A in FIG. In the process in which the rake 104 moves upward from the bottom of the water channel 2, tree branches, fallen leaves, driftwood, etc. flowing through the water channel 2 and dust adhering to the screen 101 are scooped up by the rake 104, and according to the endless chain 103. Move upward. When the rake 104 changes direction from the upward direction to the downward direction of the drive sprocket 105, the dust captured by the rake 104 falls to the belt conveyor 109 through the chute 110, and the dust is removed from the water channel by the belt conveyor 109. As another example, there is one shown in Patent Document 1, for example.
JP 2008-174942 A

  However, according to the conventional dust remover, when the rake 104 is large and flexible, for example, when the blue sheet 200 is scooped up as shown in FIG. In this case, the rake 104 starts to descend while being entangled with the rake 104 and may eventually flow downstream from the screen 101. In this case, the pumping pump installed downstream from the dust remover is overloaded. There's a problem.

  Therefore, the object of the present invention is to detect when the trash trapped in the rake does not fall on the belt conveyor and becomes entangled with the rake, thereby stopping the rotation of the rake, thereby An object of the present invention is to provide a dust remover that prevents captured dust from flowing downstream.

  In order to achieve the above-mentioned object, the present invention as set forth in claim 1 includes a screen disposed so as to block the flowing water, and when the front surface of the screen is lifted while scooping up the dust in the flowing water and is lowered from the uppermost position. In a dust remover equipped with at least one rake for dropping trash and a rake drive for circulating the rake to the front of the screen, it is arranged so as to cross the rake passage below the trash drop position. A sensor having a plurality of contact pieces that swing when contacted with dust that has not fallen, and a switch that detects when the contact pieces swing to a predetermined angle and stops the rake drive unit is provided. It is characterized by that.

  In order to achieve the above object, according to a second aspect of the present invention, there is provided the dust remover according to the first aspect, wherein the sensor is arranged along the longitudinal direction of the rotating shaft arranged so as to cross the rake passage path. A plurality of contact pieces attached at a predetermined interval, an arm attached to the rotating shaft, and the switch is operated when the rotating shaft swings to a predetermined angle, and the distance to the rotating shaft can be changed. It has a weight for adjusting the operation of the contact piece according to the magnitude of the load applied to the contact piece when the dust attached to the rotating shaft does not fall from the rake and comes into contact therewith.

  In order to achieve the above object, according to a third aspect of the present invention, there is provided a dust remover according to the first or second aspect, wherein the contact piece is a strip-shaped plate and is formed of a comb-shaped groove formed in the rake. A plurality of the shafts are attached to the rotating shaft so as to be fitted in each.

  According to the dust remover according to the present invention, the dust captured by the rake does not fall on the belt conveyor but can be detected when the rake is entangled to stop the rotation of the rake. effective. In addition, since the trash trapped in the rake is not allowed to flow downstream, there is an effect that the problem that the pumping pump installed downstream from the dust remover is overloaded is not caused.

(Dust remover configuration)
FIG. 1 is a side sectional view showing a dust remover according to an embodiment of the present invention. The dust remover 1 is installed on the water bottom B so as to block the running water F such as the water channel 2, and is connected to the screen 11 installed so that the upper side is inclined downstream with respect to the running water F, and the upper side of the screen 11. The apron 12 arranged in this manner, the endless chain 13 installed so as to circulate around the screen 11 and the apron 12, and the tip part is attached to the endless chain 13 in a comb-like shape, and is illustrated together with the endless chain 13. A plurality of rakes 14 that circulate in the A direction, a drive sprocket 15 that is installed on the upper portion of the endless chain 13 and rotates the endless chain 13, a driven sprocket 16 that is installed on the lower portion of the endless chain 13, the screen 11 and the apron. A plurality of support girders 17 for supporting 12 and holding the support girders 17 and the above sprockets, etc. Frame 18, a belt conveyor 20 installed obliquely below the drive sprocket 15, a chute 21 installed on the top of the belt conveyor 20, and a drive sprocket 15 for guiding dust falling from the rake 14 to the belt conveyor 20. And a sensor 30 installed underneath.

  The screen 11 has a configuration in which, for example, steel materials are assembled in a bowl shape so that dust flowing through the water channel 2 can be stopped. The screen 11 has a specification having a height higher than the water depth of the water channel 2.

  The endless chain 13 is guided by rails (not shown) and is suspended so as to mesh with the drive sprocket 15 and the driven sprocket 16 and constitutes a rake drive unit together with these sprockets. Further, rakes 14 are attached to the endless chain 13 at regular intervals. Incidentally, 4 to 6 rakes 14 are usually attached.

  The rake 14 is processed so that the tip portion has a comb-like shape and has an upward bend, and is shaped so as to easily scavenge dust adhering to the screen 11 and dust flowing through the water channel 2.

  A pair of drive sprockets 15 are disposed on both sides of the screen 11 and the apron 12, and these are rotationally driven by a motor via a reduction mechanism (not shown). The driven sprocket 16 is paired with the drive sprocket 15 to support the lower end portion of the endless chain 13 and is not connected to a drive source such as a motor. In addition, this driven sprocket 16 may substitute a chain guide rail and may not provide it.

(Sensor configuration)
FIG. 2 is a front view showing a detailed configuration of the sensor, and FIG. 3 is a cross-sectional view taken along line CC of the sensor shown in FIG. 2 shows a state viewed from the direction D in FIG.

  For example, the sensor 30 is disposed so as to traverse the passage path of the rake 14 from directly under the drive sprocket 15 to the chute 21. The sensor 30 includes a rotary shaft 31 supported at both ends by bearings 32 a and 32 b attached to the frame 18, a plurality of contact pieces 33 attached to the rotary shaft 31, and a rotary shaft 31 at one end of the rotary shaft 31. An arm 34 mounted upright, a limit switch (switch) 35 disposed opposite to the tip of the arm 34, and a rod-shaped weight attached to the other end of the rotating shaft 31 by hanging down from the rotating shaft 31 The adjustment bar 36 is provided with a torque adjustment weight (weight) 37 movably attached to the weight adjustment bar 36.

  The limit switch 35 is connected to a control panel 50 that controls the operation of the dust remover 1 using an AC power supply 40 such as AC 200V as a power source. The control panel 50 is connected to a motor 51 serving as a drive source for the drive sprocket 15. An alarm device 52 such as a lamp or a buzzer is connected.

  The contact piece 33 has, for example, a strip shape made of a metal material having corrosion resistance and strength, and is attached to the rotating shaft 31 at a constant interval. In the case of the present embodiment, the contact piece 33 is composed of 20 pieces. The contact piece 33 is applied with an urging force according to the magnitude of the contact pressure (load) to the rotating shaft 31 when dust such as a vinyl sheet comes into contact with the tip 33a. As shown in FIG. 2, the rake 14 is provided with grooves 14a at regular intervals in the width direction of the front end portion 33a (comb teeth), so that the respective front end portions 33a of the contact pieces 33 can enter the groove 14a. It is configured.

  The arm 34 has a long plate shape, a rod shape, or the like, and swings as the rotary shaft 31 rotates. In the process, the length and installation position are determined so that the arm 34 can contact the lever 35a of the limit switch 35. Yes.

  The limit switch 35 is, for example, an enclosed micro switch that can be used outdoors, and includes the lever 35a, a plunger, a micro switch, a case, and the like (not shown).

  The weight adjustment bar 36 allows the mounting position of the torque adjustment weight 37 to be changed. On the outer surface, a scale indicating the position of the torque adjustment weight 37 by engraving, printing, etc., a numerical value indicating the set torque amount, etc. It is desirable to give it. The torque adjustment weight 37 attached to the weight adjustment bar 36 is, for example, a cylindrical metal object, and is fixed to the weight adjustment bar 36 with a screw or the like (not shown).

  The torque adjustment weight 37 facilitates the rotation of the rotary shaft 31 as the attachment position of the torque adjustment weight 37 becomes the tip of the weight adjustment bar 36 (the lower end in FIG. 2). This degree of rotation corresponds to the sensitivity of the sensor 30. As an example, the mounting position of the torque adjustment weight 37 is set so that the acting force required for the arm 34 to operate the limit switch 35 is 50 kg. According to the inventor's study, this set value is an optimum value for detecting large vinyl sheets, blue sheets, etc., and the limit switch is configured with a small size vinyl sheet that does not hinder the operation of the pump or the like. 35 was a value which did not operate.

(Operation of dust remover and sensor)
Next, operations of the dust remover 1 and the sensor 30 will be described. When the motor 51 is driven by the control panel 50 and the drive sprocket 15 rotates, the endless chain 13 rotates in the direction of the arrow A in FIG. 1, and each rake 14 rotates accordingly. As each rake 14 moves upward from the bottom B of the water channel 2 shown in FIG. 1, tree branches, fallen leaves, driftwood, etc. flowing through the water channel 2 and dust adhering to the screen 11 are scooped up by the rake 14. Then, it moves upward according to the endless chain 13 as it is.

  When the rake 14 reaches the uppermost position (directly above the drive sprocket 15) and turns downward from the same position, the dust caught by the rake 14 falls onto the belt conveyor 20 through the chute 21, and the garbage is collected. Since the belt conveyor 20 is removed from the water channel by the rotation of the belt conveyor 20, the dust does not flow downstream of the dust remover 1, and therefore no trouble occurs in the pumping pump installed downstream.

  At this time, since the dust does not contact any of the plurality of contact pieces 33 in the sensor 30, the rotating shaft 31 and the arm 34 do not move, and therefore the limit switch 35 does not operate and the motor 51 continues to rotate.

(Dust remover stop control)
Next, a case where a blue sheet or the like cannot be collected on the belt conveyor 20 will be described. FIG. 4 is a side cross-sectional view illustrating a state where the blue sheet scooped up by the rake does not fall from the rake to the belt conveyor in the dust remover illustrated in FIG. 1.

  When the blue sheet 200 scooped up by the rake 14 passes through the drive sprocket 15 while being entangled with the rake 14, the blue sheet 200 is pulled down by the engaged rake 14 as shown in FIG. 4. If left in this state, the blue sheet 200 moves to the vicinity of the back surface of the frame 18 and falls downstream of the dust remover 1. Alternatively, there is a possibility that the inside of the dust remover 1 rotates many times.

  However, by providing the sensor 30, when the rake 14 entangled with the blue sheet 200 reaches the sensor 30, the blue sheet 200 comes into contact with the contact piece 33, whereby an external force is applied to the contact piece 33. As a result, the plurality of contact pieces 33 and the rotation shaft 31 swing and rotate in the counterclockwise direction of FIG. 4 and the E direction of FIG. Further, as a result of the arm 34 swinging in the F direction with the rotation of the rotary shaft 31, the contact piece 33 and the arm 34 are in the positions of the broken lines shown in FIG. In this state, as shown in FIG. 3, the tip of the arm 34 comes into contact with the lever 35a of the limit switch 35, and the lever 35a rotates the contact of the limit switch 35, so that the limit switch 35 is turned on.

  When the control panel 50 determines that the limit switch 35 is turned on, the control panel 50 stops the power supply from the AC power supply 40 to the motor 51 and further drives the alarm device 52 to warn the staff. When the motor 51 is stopped, the blue sheet 200 is held at the position shown in FIG. Accordingly, the blue sheet 200 does not fall downstream from the dust remover 1.

  On the other hand, a staff member who knows the alarm by the alarm device 52 rushes to the dust remover 1 and removes the blue sheet 200 from the dust remover 1. When the blue sheet 200 is removed, the weight adjusting bar 36 moves in the G direction shown in FIG. 3 due to the weight of the torque adjusting weight 37, so that the rotating shaft 31 also rotates in the G direction. Oscillates in the H direction shown in FIG. 3, and the sensor 30 is in a normal position. Thereafter, a staff member or the like operates the control panel 50 to resume power supply to the motor 51. Thereby, the dust remover 1 restarts the dust removal operation.

  In the above embodiment, instead of the belt conveyor 19, a transport vehicle, a carriage, or a storage space may be arranged. The limit switch 35 may be a photoelectric switch, a linear sensor, a magnetically sensitive switch, or the like.

  Further, the number of contact pieces 33 is 20. However, this is only an example, and can be changed according to the amount or type of dust in a water channel or the like.

  The limit switch 35 is operated by the arm 34, but is not limited to the configuration shown in the figure. For example, the rope or chain is moved by the rotation of the rotary shaft 31, and the rope or chain is connected to the limit switch 35. A configuration in which an operating piece is attached and the operating piece comes into contact with the limit switch 35 may be adopted.

It is side surface sectional drawing which shows the dust remover of one Embodiment of this invention. It is a front view which shows the detailed structure of a sensor. It is sectional drawing of CC line of the sensor shown in FIG. In the dust remover shown in FIG. 1, it is side surface sectional drawing which shows a mode when the blue sheet scooped up by the rake did not fall to a belt conveyor from a rake. It is side surface sectional drawing which shows the structure of the principal part of the conventional dust remover. FIG. 6 is a side cross-sectional view showing a state in which large and flexible dust is entangled with a rake in the dust remover of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust remover 2 Water channel 11 Screen 12 Apron 13 Endless chain 14 Rake 14a Groove 15 Drive sprocket 16 Driven sprocket 17 Supporting girder 18 Frame 20 Belt conveyor 21 Chute 30 Sensor 31 Rotating shaft 31a Tip edge 32a, 32b Bearing 33 Contact piece 33a Tip 34 Arm 35 Limit switch 35a Lever 36 Weight adjustment bar 37 Torque adjustment weight 40 AC power supply 50 Control panel 51 Motor 52 Alarm 200 Blue sheet B Water bottom F Flowing water

Claims (3)

A screen arranged to block running water, at least one rake that raises the front of the screen while scooping up dust in the running water, and drops the dust when descending from the uppermost position; and In a dust remover equipped with a rake drive that circulates in front of the screen,
A plurality of contact pieces that are arranged so as to traverse a rake passing path below the dust fall position and swing when contacted with dust that has not fallen from the rake, and a predetermined angle between the contact pieces And a switch having a switch for stopping the rake drive unit by detecting the swinging of the rake drive unit. The sensor is
A plurality of contact pieces attached at predetermined intervals along the longitudinal direction of the rotation shaft arranged so as to cross the rake passage path;
An arm attached to the rotating shaft and operating the switch when the rotating shaft swings to a predetermined angle;
The operation of the contact piece is adjusted according to the magnitude of the load applied to the contact piece by contacting the dust that has been attached to the rotary shaft and has not fallen from the rake so that the distance to the rotation axis can be changed. Weight for,
The dust remover according to claim 1, comprising:   The contact piece is a strip-shaped plate, and a plurality of the contact pieces are attached to the rotary shaft so as to be fitted into each of the comb-shaped grooves formed in the rake. The dust remover described.

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