JP5222705B2 - Dust remover - Google Patents

Description

  The present invention relates to a dust remover that scoops up and removes dust trapped by a screen bar disposed at a water intake for a generator of a hydroelectric power plant.

A screen bar is arranged at the intake of water for generators such as hydroelectric power plants to capture dust contained in the water flowing in from it, and in order to remove the dust captured by the screen bar. A dust remover is used. As dust removers, there are a fixed arrangement and a traveling type, both of which have a mechanism that raises and lowers the rake along the surface of the screen bar and scoops up and removes the dust trapped there. I have. As a rake support mechanism for raising and lowering the rake along the screen bar, a hydraulic cylinder drive type arm type and a rope type support type are known. Patent Documents 1 and 2 disclose a traveling multistage dust remover. Further, the applicant of the present application disclosed in Patent Document 3 is a mechanism capable of smoothly expanding and contracting the telescopic arm supporting the rake, and a simple operation for opening and closing the telescopic arm supporting the rake. Proposes a dust remover with a mechanism and a mechanism to remove dust attached to the rake.
Japanese Patent Application Laid-Open No. 07-207646 JP 54-47340 A Japanese Patent No. 4064551

  An object of the present invention is to realize an inexpensive and simple self-propelled dust remover using the dust remover disclosed in Patent Document 1.

  The present invention relates to a dust remover that lifts and lowers a rake along a screen bar installed in an irrigation channel, and scoops up dust trapped on the screen bar by the rake. A multi-stage telescopic arm and a telescopic mechanism for extending and retracting the multi-stage telescopic arm. The multi-stage telescopic arm includes a plurality of cylindrical arms, and the lower side cylinder from the lower end opening of the upper side cylindrical arm. The cylindrical arms can be drawn downward, and the drawers of the plurality of cylindrical arms are guided by rollers. The telescopic mechanism is a hoisting device composed of a chain block, and is mounted on the uppermost cylindrical arm of the multistage telescopic arm. Thus, an inexpensive and simple telescopic mechanism with good operability is formed.

Here, when the multistage telescopic arm is extended downward along the screen bar by unwinding the chain, for example, the rake hits an obstacle such as dust trapped on the screen bar and stops there, and only the chain May be unwound. In addition, the multistage telescopic arm may not extend even if the chain is entangled with an obstacle such as dust at an intermediate position and the chain is unwound. In such a case, the chain can be slackened. Therefore, in the present invention, in addition to the above configuration, a slack detection mechanism for detecting the slack of the chain of the chain block is provided, and such a situation can be quickly detected and dealt with. I am doing so.

Slack detection mechanism of the present invention given is a pulley chain bridged, and a spring member that urges in a direction opposite to the direction of the force acting the pulley from the chain, by the biasing force pulley by a spring member that it has a sensor for detecting that it has moved to the position.

  Next, in order to make the dust remover of the present invention having the above configuration self-propelled, the arm support base disposed on the rear side of the multistage telescopic arm and the rear end portion can be rotated in the vertical direction by the arm support base. The arm opening and closing fulcrum supported by the arm support arm, the front end of which is fixed to the uppermost cylindrical arm of the multistage telescopic arm, and the bridge between the arm support base and the uppermost cylindrical arm And an arm opening / closing device having an electric cylinder for opening and closing the arm, and a traveling carriage having an electric saddle that travels along a horizontal traveling rail disposed horizontally at an upper position thereof is used as an arm support base. It is desirable. According to this configuration, a self-propelled dust remover with good workability can be constructed at low cost using a general-purpose low head type electric saddle.

  In this case, in order to reliably support the traveling carriage supporting the multistage telescopic arm in a stable state, a horizontal guide rail extending parallel to the horizontal traveling rail is provided at a position below the rear of the horizontal traveling rail. A guide that is arranged and forms a horizontally extending vertical guide surface facing the front on the horizontal guide rail, is pressed against the vertical guide surface from the front side to the lower end portion of the traveling carriage, and rolls along the vertical guide surface It is desirable to install a roller.

  In addition, by placing the lower part of the traveling carriage at a position retracted by a predetermined distance with respect to the upper end of the screen bar, dust scooped up by the rake is placed under the traveling carriage. A space that can be discharged from the rake can be secured.

  Hereinafter, embodiments of a dust remover to which the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a side view of a dust remover according to the present embodiment, and FIG. 2 is a front view thereof. The dust remover 1 is for scooping up and removing dust trapped by the screen bar 3 disposed in the water intake 2 for the generator of the hydroelectric power plant, and a rake 4 is attached to the lower end portion. A multi-stage telescopic arm 5 that can be expanded and contracted, a hoisting device 6 composed of a chain block that expands and contracts the multi-stage telescopic arm 5, a slack detecting mechanism 7 that detects slack of the chain, and the multi-stage telescopic arm 5 are supported. Arm support arm 8, arm opening / closing device 9 for opening / closing multistage telescopic arm 5 in the front-rear direction (direction approaching and leaving the screen bar 3), and arm support arm 8 and traveling supporting arm opening / closing device 9 It has a carriage 10 (arm support base) and a gantry 11 that supports the traveling carriage 10 in a state where it can travel. As shown in FIG. 1, the multistage telescopic arm 5 can be expanded and contracted and opened and closed between a contracted closed state 5A and an expanded open state 5B.

  FIG. 3 is an enlarged partial side view of the dust remover 1, and FIG. 4 is an enlarged partial front view thereof. Referring mainly to these drawings, the multistage telescopic arm 5 is a three-stage telescopic arm provided with a lower cylindrical arm 51, a middle cylindrical arm 52, and an upper cylindrical arm 53 in this example. The middle cylindrical arm 52 can be pulled downward from the lower end opening of the upper cylindrical arm 53, and the lower cylindrical arm 51 can be pulled downward from the lower end opening of the middle cylindrical arm 52. A rake 4 is attached to the lower end. The withdrawal of these three cylindrical arms 51 to 53 is guided by roller pairs 54, 55, 56 attached to the upper and lower ends of the upper cylindrical arm 53, the lower cylindrical arms 52 and the lower ends of the lower cylindrical arm 51. It has become.

  The hoisting device 6 composed of a chain block for extending and retracting the multistage telescopic arm 5 is mounted on the front side surface of the upper cylindrical arm 53 in the multistage telescopic arm 5. A hook 62 is attached to the lower end of the chain 61 unwound from the hoisting device 6, and this hook 62 is attached to a hook latch pin 63 attached to the front side surface of the lower end portion of the lower cylindrical arm 51. It is hung. By using a general-purpose chain block, the telescopic mechanism has a simple structure and good operability.

  A slack detecting mechanism 7 for detecting slack of the chain 61 is mounted on the upper part of the hoisting device 6 in the upper cylindrical arm 53. The slack detection mechanism 7 includes a swivel plate 72 that can be swung up and down around a horizontal support pin 71 attached to the upper cylindrical arm 53, and a roller 73 is provided at a lower front end of the swivel plate 72. The upper end side portion of the chain 61 is bridged around the roller 73. The swivel plate 72 is given a biasing force clockwise around the horizontal support pin 71 by a coil spring 74. The swivel plate 72 is normally in a swiveling position in which the coil spring 74 is compressed by a predetermined amount by the tension of the chain 61. When the tension of the chain 61 decreases, the swivel plate 72 is urged clockwise by the coil spring 74, and the roller 73 attached thereto reaches a position that can be detected by a sensor (not shown). A mechanical sensor, an optical sensor, or the like can be used as the sensor.

  Next, the multistage telescopic arm 5 on which the hoisting device 6 and the slack detection mechanism 7 are mounted is supported by the traveling carriage 10 via the arm support arm 8. The rear end portion of the arm support arm 8 is supported so as to be rotatable in the vertical direction around a support pin 81 attached to the traveling carriage 10, and an arm opening / closing fulcrum is defined by the support pin 81. The upper end of the upper cylindrical arm 53 of the multistage telescopic arm 5 is fixed to the front end 82 of the arm support arm 8.

  On the lower side of the arm support arm 8, an arm opening / closing device 9 including an arm opening / closing electric cylinder 91 spanned between the traveling carriage 10 and the upper cylindrical arm 53 is arranged. The front end of the actuating rod 92 of the electric cylinder 91 is slidable in a direction parallel to the central axis of the upper cylindrical arm 53 along a guide shaft 93 attached in parallel to the rear side surface of the upper cylindrical arm 53. It is connected with. The rear end portion of the electric cylinder 91 is attached in a state that it can swing in the vertical direction by a support bracket 101 attached to the traveling carriage 10 side. When the electric cylinder 91 is extended, the multistage telescopic arm 5 opens and closes in the front-rear direction around the opening and closing fulcrum (81).

  Next, the traveling carriage 10 and the gantry 11 will be described. The gantry 11 includes a horizontal traveling rail 111 disposed horizontally at a predetermined height position along the screen bar 3 on the shore of the irrigation channel, and a horizontal guide rail 112 disposed in parallel at a position below the rear side. It has. The horizontal traveling rail 111 and the horizontal guide rail 112 are supported by a column frame 113 erected on the shore at a predetermined interval in the horizontal direction. The horizontal traveling rail 111 has an H-shaped cross section arranged vertically, and the horizontal guide rail 112 has an H-shaped cross section arranged horizontally, and includes a vertical guide surface 114 facing forward.

  The traveling carriage 10 is constructed by assembling steel materials. When viewed from the front, the traveling carriage 10 is a rectangular with a constant width that is long in the vertical direction. ing. A low head type electric saddle 12 is mounted on the upper end of the traveling carriage 10, and the low head type electric saddle 12 travels along a horizontal traveling rail 111. A pair of horizontal guide rollers 13 are attached to the lower end 102 of the traveling carriage 10 in a rotatable state. These horizontal guide rollers 13 are pressed against the vertical guide surface 114 of the horizontal guide rail 112 from the front side. When the traveling cart 10 travels by the low head type electric saddle 12, the horizontal guide roller 13 rolls along the vertical guide surface 114 accordingly.

  Here, as shown in FIG. 1, the lower portion 103 of the traveling carriage 10 has a side shape inclined downward and rearward. Further, the gantry 11 is installed such that the lower portion 103 is at a position retracted by a predetermined distance from the upper end 31 of the screen bar 3. Therefore, a sufficient space 15 is secured below the traveling carriage 10 so that dust raised by the rake 4 can be discharged.

  Moreover, as can be seen from FIG. 1, in the state 5A in which the multistage telescopic arm 5 is contracted and closed, the entire dust remover 1 is located on the shore. Such an arrangement can be easily realized by adjusting the length of the arm support arm 8 and the installation position of the gantry 11. If such an arrangement is adopted, operations such as maintenance and inspection can be performed more efficiently than when a part of the dust remover 1 protrudes on the water. Further, the operator can move the rake 4 while walking along the shore while holding the operation panel 16 of the low head type electric saddle 12, and can perform the work safely and efficiently.

It is a side view of a dust remover to which the present invention is applied. It is a front view of the dust remover of FIG. It is an enlarged partial side view of the dust remover of FIG. It is an enlarged partial front view of the dust remover of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust remover 2 Intake port 3 Screen bar 4 Rake 5 Multistage telescopic arm 6 Hoisting device 7 Slack detection mechanism 8 Arm support arm 9 Arm opening / closing device 10 Traveling carriage 11 Base 12 Low head type electric saddle 13 Horizontal guide roller 15 Space 16 Operation panel 31 Upper end 51 Lower cylindrical arm 52 Middle cylindrical arm 53 Upper cylindrical arms 54, 55, 56 Roller pair 61 Chain 62 Hook 63 Hook latch pin 71 Support pin 72 Swivel plate 73 Roller 74 Coil spring 81 Support pin ( Opening and closing fulcrum)
82 Front end portion 91 Electric cylinder 92 Actuating rod 93 Guide shaft 101 Support bracket 102 Lower end portion 103 Lower portion 111 Horizontal traveling rail 112 Horizontal guide rail 113 Post frame 114 Vertical guide surface

Claims (4)

In the dust remover (1) which raises and lowers the rake (4) along the screen bar (3) installed in the irrigation channel etc. and scoops up the dust trapped on the screen bar (3) by the rake (4).
A retractable multi-stage telescopic arm (5) to which the rake (4) is attached to a lower end portion;
An extension mechanism (6) for extending and retracting the multistage extension arm (5),
The multistage telescopic arm (5) includes a plurality of cylindrical arms (51 to 53), and the lower cylindrical arm can be drawn downward from the lower end opening of the upper cylindrical arm. The drawer of the cylindrical arms (51-53) is guided by rollers (54-56),
The telescopic mechanism (6) is a hoisting device comprising a chain block, and is mounted on the uppermost cylindrical arm (53) in the multistage telescopic arm (5) ,
Furthermore, it has a slack detection mechanism (7) for detecting slack in the chain (61) of the chain block,
The slack detection mechanism (7) biases the pulley (73) around which the chain (61) is bridged and the direction of the force acting on the pulley (73) from the chain (61). A dust remover (1), comprising: a spring member (74) that is moved, and a sensor that detects that the pulley (73) has moved to a predetermined position by the biasing force of the spring member (74 ). . In the dust remover (1) according to claim 1,
An arm support (10) disposed on the rear side of the multistage telescopic arm (5);
The rear end portion is an arm opening / closing fulcrum (81) supported rotatably by the arm support base (10) in the vertical direction, and the front end portion (82) is the uppermost cylindrical shape of the multistage telescopic arm (5). An arm support arm (8) fixed to the arm (53);
An arm opening and closing device (9) including an arm opening and closing electric cylinder (91) bridged between the arm support (10) and the uppermost cylindrical arm (53);
The dust removal machine characterized in that the arm support (10) is a traveling cart provided with an electric saddle (12) that travels along a horizontal traveling rail (111) disposed horizontally at an upper position thereof. 1). In the dust remover (1) according to claim 2 ,
A horizontal guide rail (112) extending in parallel with the horizontal traveling rail (111) is disposed at a position below the rear side of the horizontal traveling rail (111), and the horizontal guide rail (112) faces forward. A vertical guide surface (114) extending horizontally;
A guide roller (13) that is pressed from the front side to the vertical guide surface (114) and rolls along the vertical guide surface (114) is attached to the lower end (102) of the traveling carriage (10). A dust remover (1) characterized by In the dust remover (1) according to claim 3,
The lower part (103) of the traveling carriage (10) is arranged to be in a position retracted by a predetermined distance with respect to the upper end (31) of the screen bar (3),
A dust remover (10) having a space (15) capable of discharging dust scooped up by the rake (4) from the rake (4) is formed below the traveling carriage (10). 1).

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