JP2007002509A - Apparatus for controlling operation of dust remover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for controlling the operation of a dust remover and capable of getting out of an overloaded state by immediately halting the operation of the dust remover when refuse is at inoperable positions of rakes and repeating both normal rotations and reverse rotations of the rakes by slow motion when refuse is within their operable ranges in the case that an overload has been generated due to the catching etc. of refuse in the dust remover. <P>SOLUTION: In the apparatus for controlling the operation of the dust remover constituted of a screen 1 for catching refuse in flowing water, the rakes 2 for raking up refuse caught on the screen 1, and an endless chain 3 to which the rakes 2 which circularly move along the surface of the screen are fastened, the operation of the dust remover is controlled by detecting the positional information of the rakes 2 at all times. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an operation control device for a dust remover, and in particular, when an overload occurs due to dust trapped in the dust remover, the operation of the dust remover is immediately stopped when the rake is in an inoperable position. The present invention relates to an operation control device for a dust remover that allows the rake to escape from an overload state by repeating forward and reverse rakes with fine movement.

Conventionally, water channels such as sewage treatment plants and water intakes are not particularly limited in order to remove dust (also referred to as “sediment”) in running water. For example, a screen type dust remover is used. Yes.
This screen type dust remover is a screen tilted backward with respect to the water flow direction so as to block the water channel such as the sewage treatment plant and the water intake, and this is not particularly limited. In order to scrape and discharge the residue trapped by this screen, it is possible to repeatedly move up and down along the screen, and a comb-shaped rake device that meshes with the screen is provided. It is composed.

  By the way, a screen type dust remover uses an endless chain that moves up and down along the screen in order to operate the rake quickly and smoothly, and to efficiently scrape the dust captured by the screen. Are arranged at predetermined intervals, for example, at intervals of 3 m, the endless chain meshes with the upper drive sprocket wheel, and a U-shaped configuration arranged along the operation trajectory of the chain below the drive sprocket wheel. It is supported by the chain guide, so that the comb-shaped rake is guided to the U-shaped chain guide so as to move up and down along the screen. Further, the lower position of the screen where the rake is reversed (lower rake reversing part) In order to prevent the residue from flowing through the gap between the bottom of the water channel and so-called waste removal, the bottom of the water channel in the upstream direction of the screen It is disposed in front screen configuration.

In this screen type U-type dust remover, the rake usually descends along the back of the screen and repeats the ascending action along the surface of the screen to lift up the dust trapped on the screen. When the operation is stopped, as shown in FIG. 6A, any one of the rakes is engaged with the screen and the front screen so that dust does not escape from the gap between the screen and the front screen.
The detection of the rake position is stopped by detecting a striker attached to the endless chain with a single mitt switch installed on the dust remover main body side.
Further, in the screen type U-type dust remover, if foreign matter such as dust is caught and an overload higher than the setting is applied to the dust remover, it is necessary to remove the bite of the foreign matter. This removal of the biting foreign matter is possible by reversing the operation of the rake device.

However, in the screen type U-type dust remover, since the front screen is disposed on the upstream side of the screen, if the operation of the rake device is immediately reversed for the purpose of eliminating biting of foreign matter, the positional relationship of the rake As shown in FIG. 6 (B), the foreign matter is caught in the front screen by the reverse rotation of the rake, and the operation of the dust remover becomes impossible. For this reason, the rake cannot be reversed unless the rake position is accurately confirmed, so this rake position is visually confirmed, but it is difficult to confirm the rake position in the sewage. There is a problem that accurate visual confirmation cannot be performed because the dust remover is not very close to the surrounding environment.
In addition, in order to compensate for the weak point by visual confirmation of the rake position, one limit switch is attached to the dust remover and the rake position is detected by the limit switch, but the distance between the rakes usually attached to the endless chain is 3 m. Since the rake position cannot be detected with a high accuracy of about several centimeters because of the spacing, the screen and the front screen may be stopped by stopping the rake device depending on the position of the stopped rake. There was a problem that garbage flowed out through a gap formed between them.
Further, even when the rake is driven in the forward rotation direction, dust may be caught at the lower end position of the screen where the rake is reversed. In such a case, there has been a problem that operation cannot be performed carelessly after confirming the overload state.

  In view of the problems of the screen-type U-type dust remover, when the dust remover is overloaded due to dust or the like, the dust remover is immediately stopped when the rake is in an inoperable position. In addition, an object of the present invention is to provide an operation control device for a dust remover that can escape from an overload state by repeating forward and reverse rakes with fine movement when in the operable range.

  In order to achieve the above object, an operation control device for a dust remover according to the present invention performs a revolving operation along a screen, a screen that captures dust in running water, a rake that sweeps up dust collected on the screen, and a screen. In the operation control device of the dust remover composed of the endless chain to which the rake is engaged, the operation of the dust remover is controlled by always detecting the position information of the rake.

  In this case, the rake position during movement in water can be detected by an encoder disposed on the water surface, and the position information of the rake can be monitored on the ground side.

  In addition, remote monitoring can be performed.

  Also, if the dust remover stops due to an overload caused by foreign matter being caught and it is detected that the rake position is at a position where forward / reverse operation is possible, perform the forward / reverse operation to release the overload state. It can be constituted as follows.

  According to the operation control device for a dust remover of the present invention, a screen for catching dust in running water, a rake for scooping up dust caught on the screen, and a rake for rotating around the screen surface are attached. Since the rake position is detected in real time by controlling the operation of the dust remover by constantly detecting the position information of the rake in the dust remover comprising the endless chain, the dust remover is overloaded. When this occurs, an accurate rake position can be immediately detected without draining water in the water channel or tank, and the operation can be switched to an appropriate operation for eliminating overload.

  In addition, by detecting the rake position while moving underwater with an encoder arranged on the water surface and monitoring the rake position information on the ground side, the rake position can be detected with high accuracy, The rake can be stopped without generating a gap between the screen and the front screen, and waste can be prevented from being washed away.

  In addition, by enabling remote monitoring, the rake position in the sewage can be reliably confirmed in a management room or the like without approaching the surrounding environment where the dust remover is installed.

  Also, if the dust remover stops due to an overload caused by foreign matter being caught and it is detected that the rake position is at a position where forward / reverse operation is possible, perform the forward / reverse operation to release the overload state. With this configuration, it is possible to automatically remove the biting foreign matter and continuously perform the dust removal operation.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an operation control device for a dust remover according to the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of the operation control device for a dust remover of the present invention.
As shown in FIG. 1, a screen type U-type dust remover A installed to remove debris in running water in a water channel S such as a sewage treatment plant or a water intake, as shown in FIG. The screen 1 disposed so as to block the water channel S and tilt backward with respect to the direction of water flow, which is not particularly limited, for example, a bar screen and a comb-teeth shape meshing with the screen 1 Rake device R having a drive device D comprising a motor 4, a torque limiter 5, a drive sprocket wheel 6 and the like, and the endless chain 3 are disposed in the endless chain 3 at predetermined intervals, for example, every 3 m. A chain guide 7 that moves up and down along the screen 1 so as to move up and down along the screen 1 so as to lift up the residue trapped by the screen 1 and rake at the bottom of the water channel. A front screen 8 that is disposed upstream of the screen 1 in the reverse position and prevents the residue from flowing away from the gap between the lower portion of the screen and the bottom of the water channel, and a control device 9 that controls the driving device D. And an instrumentation facility 10 for displaying the control by the control device 9 in real time, an encoder 11 for detecting the rake position during movement, and a striker 12b attached to the endless chain 3. The rake position detecting mechanism 12 is configured to be detected and stopped by a limit switch 12a installed on the side.

The control device 9 of the screen type U-type dust remover A receives signals from the torque limiter 5 of the drive device D, the encoder 11 and the limit switch 12a, and determines the rotation direction (forward rotation, reverse rotation) of the motor 4 of the drive device D. It is configured to perform control and stop control.
When a failure occurs in the screen-type U-type dust remover A, a failure signal is sent from the control device 9 to the customer-side instrumentation equipment 10 to display the failure, and a linked operation command is sent from the instrumentation equipment 10. It is configured to transmit to the control device 9.
In addition, as shown in FIG. 1, the rake position information may be transmitted from the control device 9 to the customer-side instrumentation equipment 10, and the instrumentation equipment 10 may be configured to display the information in real time. it can.

In this case, the control device 9 has an arbitrary configuration such as a panel computer such as a touch panel type (a device in which a TFT touch panel and a sequencer are integrated) as shown in FIG. 3 or a combination of a display panel and a sequencer. Thus, for example, a chain guide that becomes a rake operation locus of the dust remover screen is fixedly displayed, and a position of the chain guide in which the rake is present is displayed as a rake position in real time. be able to.
In addition, as shown in FIG. 4, the control device 9 displays the rake position in real time by using a display device such as a light emitting diode in which a rake operation locus is linearly arranged in a control device incorporating a sequencer. Further, as shown in FIG. 5, in the example shown in FIG. 4, a display such as a light emitting diode is arranged along the rake operation locus to display the rake position in real time. Etc. can be arbitrarily adopted.
And the control apparatus 9 can be integrated in the machine side panel of the vicinity of a dust remover, or can be integrated in the space of a dust remover main body, for example.

Next, the operation of the operation control device for the dust remover of the present invention will be described.
The screen 1 of the screen-type U-type dust remover A disposed in the water channel S captures dust in flowing water and drives the motor 4 to engage the drive sprocket wheel 6 with an endless chain 3. It is guided to a chain guide 7 disposed along the screen and is driven in a circular manner. As a result, the rake 2 or the plurality of rakes 2 arranged in the endless chain 3 at a predetermined interval moves along the rake operation locus by the chain guide 7.
When the rake 2 moves along the operation trajectory, particularly when the rake 2 meshes with the screen 1 and moves in the upward direction, the trash G captured by the screen 1 is swept up and discharged out of the water channel.

During the movement of the rake 2, the number of strikers 12 b equal to the number of rakes attached to the endless chain 3 for detecting the rake position is removed together with the rake position information for detecting the position of each rake 2 by the encoder 11. The rake position detection information detected by the limit switch 12a installed at a fixed position on the main body side and the signal from the torque limiter 5 that drives the motor are simultaneously transmitted to the control device 9.
Thereby, the signal transmitted to the control device 9 can be transmitted from the control device 9 to the instrumentation equipment 10 on the customer side, and the position of each rake can be displayed in real time. Driving can be done.

During the normal operation of the screen-type U-type dust remover A, if an overload occurs in the driving motor due to dust or the like being caught between the screen 1 and the operating rake 2, this overload is caused by the torque limiter 5 (Or a current value monitor) and the detection result is immediately displayed on the instrumentation equipment 10.
In the case where the generated overload is higher than the normal operation value and lower than the maximum set value and within the rake operation possible range, the motor is stopped and then reversely rotated. The dust G caught in the screen can be eliminated by repeating the switching between the forward rotation and the reverse rotation once or several times.
It should be noted that the forward and reverse rotations of the rake are alternately performed by fine movement (inching operation), and this prevents the dust G from being caught, and the operation is continued when no overload is detected. If the overload state is still not canceled by the inversion operation of rotation or reverse rotation, the motor 4 is immediately stopped and foreign matter biting is manually eliminated.

  However, if the generated overload is a value greater than the set value, the motor 4 is immediately stopped by the operation of the relay Ry. Since each rake position at this time is displayed on the instrumentation equipment 10, the operator can check each rake position at the time of stop, so that the foreign object is manually bitten in the same manner as in the past. Exclude.

  In addition, since this rake position is displayed on the display panel of the control apparatus 9, and also when data transmission is carried out to the instrumentation equipment 10, since it can also display on the instrumentation equipment 10, the operator is visually. The rake position can be detected accurately without requiring confirmation.

  As mentioned above, although the operation control apparatus of the dust remover according to the present invention has been described based on the embodiments thereof, the present invention is not limited to the configurations described in the above embodiments, and as appropriate without departing from the spirit thereof. The configuration can be changed.

  The operation control device of the dust remover of the present invention continuously detects the rake position information by the rake position detection mechanism using the encoder and the limit switch, thereby detecting the rake position in real time with high accuracy and operating the dust remover. Since it has the characteristic of controlling, it can be used suitably for the purpose of automatic operation of a dust remover.

It is a front view which shows one Example of the operation control apparatus of the dust remover of this invention. It is circuit explanatory drawing. It is explanatory drawing of the display panel of a control apparatus. It is explanatory drawing of the display panel from which a control apparatus differs. It is explanatory drawing of the display panel from which a control apparatus differs. It is explanatory drawing of the inversion position of a rake.

Explanation of symbols

A Screen type U type dust remover D Drive device R Rake device S Water channel such as sewage treatment plant and intake 1 Screen 2 Rake 3 Endless chain 4 Motor 5 Torque limiter 6 Drive sprocket wheel 7 Chain guide 8 Front screen 9 Control device 10 Total Equipment 11 Encoder 12 Rake position detection mechanism 12a Limit switch 12b Striker

Claims (4)

  An operation control device for a dust remover comprising a screen for catching dust in running water, a rake for scooping up the dust caught on the screen, and an endless chain engaged with a rake that circulates along the screen surface The operation control device of the dust remover, wherein the operation of the dust remover is controlled by always detecting the position information of the rake.   2. The operation control apparatus for a dust remover according to claim 1, wherein the rake position during movement in water is detected by an encoder disposed on the water surface, and the position information of the rake is monitored on the ground side.   The operation control device for a dust remover according to claim 1 or 2, wherein remote monitoring is possible.   When the dust remover stops due to the occurrence of an overload due to foreign matter being caught and the rake position is detected to be in a position where forward / reverse operation is possible, perform forward / reverse operation to release the overload state. The operation control device for a dust remover according to claim 1, 2 or 3, wherein the operation control device is configured.

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