JPH0830328B2 - Dust remover - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dust removing device for lifting screen dust, dust, and the like (hereinafter, referred to as dust) locked on a dust removing grid by a rake.

[Conventional technology]

As a rake type dust remover, a rake arm with a rigid structure that supports the rake is pivotally mounted in a plane that is orthogonal to the plane of the dust removal grid, and if excessive dust is caught on the rake, the rake will be removed. A structure is known in which the shaft is disengaged and rotated upstream about a pivot to automatically disengage from the dust (Japanese Patent Publication No. 56-11811).

[Problems to be Solved by the Invention]

However, since the rake of the conventional dust removing device only rotates at one joint part (pivot part) of the rake arm, when excessive dust is caught on the rake,
There is a problem in that it often separates to the upstream side and rotates and does not come off from the dusts, which easily causes a major failure.

An object of the present invention is to provide a dust removing device which has a high reliability of operation and which can reverse a rake without trouble.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention is a dust removal grid diagonally provided across the waterway and with the upper part on the downstream side and the lower part on the upstream side, and is wound around a pair of upper and lower sprocket wheels. And a pair of left and right endless chains rotatably provided on the upstream side of the dust removal grid, and a plurality of arm portions flexibly connected by connecting pins in a plane orthogonal to the surface of the dust removal grid. At least one pair of left and right rake arms individually pivotally attached to the respective endless chains, respectively, and a rake horizontally supported at the free ends of the left and right pair of rake arms, and the endless chains are circulated. A drive device that raises the rake along the dust removal grid to lift up the debris retained on the dust removal grid with the rake, and is arranged below the lower sprocket wheel. An outer arc guide rail for guiding the guided member provided on each arm portion of the rake arm, and substantially vertically provided on the upper portion of the lower sprocket wheel, along the dust removal grid when the endless chain is reversed. The auxiliary guide rail is configured to receive the guided member of the rake arm that has descended in a bent state and guide it to the downstream side portion of the outer arc-shaped guide rail.

[Action]

When the drive device is actuated, the rake circulates together with the endless chain, catches the debris locked on the dust removal grid, and lifts it along the dust removal grid.

When the weight of dust exceeds the limit, the rake is generated by the action of the rake arm that bends and rotates upstream in all or part of the joint part of the connecting pin and the joint part of the pivot axis. Automatically comes off. Therefore, the dust remover will not be damaged by overload.

The outer arc-shaped guide rail guides the guided member and moves the rake arm from the descending side to the ascending side in a predetermined state. Further, the auxiliary guide rail receives the guided member of the rake arm that has descended in a bent state along the dust removal grid when the endless chain is reversed, and guides it to the downstream side portion of the outer arc-shaped guide rail.

〔Example〕

The attached drawings show an embodiment of the present invention, in which reference numeral 1 is a dust removing grid. This dust removing grid 1 is for locking in dust that has flowed in, traverses the water channel 2, and
The upper part is arranged on the downstream side, and the lower part is arranged on the upstream side, and they are obliquely provided. On the left and right of the upstream side of the dust removal grid 1, the endless chains 3 are attached to the upper and lower sprocket wheels 4,5.
It is provided so as to be wound around, and is circulated by the drive device 6 in a direction in which the side close to the upstream side surface of the dust removal grating 1 rises (counterclockwise in FIG. 1).

On the inner surfaces of the left and right endless chains 3, 3 (only one of which is shown in the figure) facing each other, the pivot 7
Are projected at a predetermined interval, and a rake arm 8 is pivotally attached to the pivot shaft 7 at its root end portion and is a surface orthogonal to the surface of the dust removal grid 1 (a surface perpendicular to the paper surface in FIG. 3). It is rotatably mounted inside. The pair of left and right rake arms 8
Is composed of a first arm portion 8a pivotally connected to the pivot 7 and a second arm portion 8b flexibly connected to the first arm portion 8a by a connecting pin 9 in a plane orthogonal to the surface of the dust removal grating 1. Therefore, the rake 10 is horizontally supported by the free end of the second arm portion 8b. The guide roller (guided member) 12, 1 is attached to the pivot 7 and the connecting pin 9, and the pin 11 provided on the second arm portion 8b.
3, 14 are respectively attached, and a stopper member 8c for preventing excessive rotation of the second arm portion 8b to the upstream side on the rising side of the rake 10 is fixed to the first arm portion 8a.

In addition, the pivot 7 and the arm portion pivotally attached to the pivot 7.
8a, for example, a member having a protrusion on the inner peripheral surface is rotatably fitted to a member having a protrusion on the outer peripheral surface, and the relative rotation of both members is brought about by the contact of the both protrusions. Regulate the angle of movement,
Similar to the stopper member 8c, the arm portion for the pivot 7
In some cases, a required excessive rotation preventing means for preventing excessive rotation of 8a may be provided.

Inner guide rails 16 and 17 for guiding the endless chain 3 are provided on the descending side D and the ascending side U of the endless chain 3.
However, the outer guide rails 18 are respectively laid from the lower part of the lower side D of the endless chain 3 to the upper part of the upper side U, and the guide rollers 12, 13, 14 are guided to the lower side D of the endless chain 3. Inner guide rail
19 and an outer guide rail 20 for guiding the guide rollers 12, 13, 14 on the rising side U of the endless chain 3,
Furthermore, below the lower sprocket wheel 5, more specifically, there are provided outer arc-shaped guide rails 21 for guiding the guide rollers 13 and 14 from the upstream side position of the lower portion of the inner guide rail 19 to the lower portion of the outer guide rail 20, respectively. , An upper guide portion of the lower sprocket wheel 5, more specifically, between the lower portion of the inner guide rail 19 and the outer guide rail 20 on the ascending side U, an auxiliary guide rail 22 is provided continuously to the lower end of the inner guide rail 19. Has been. When the endless chain 3 is rotated in the reverse direction, the auxiliary guide rail 22 receives the guide roller 14 of the rake arm 8 that has descended in a bent state on the rising side U and gradually guides it to the downstream side portion of the outer arc-shaped guide rail 21. Rake arm 8
The upper part of the main part is arranged on the upstream side and the lower part is arranged on the downstream side, and is obliquely (almost vertically) provided.

The reference numeral 23 in FIG. 1 is a scraping lever for scraping the dust trapped on the rake 10 to the discharge port 24, and can be rotated by the cylinder 25. 15 is a belt conveyor.

Next, the operation of the dust removing device according to the present invention configured as described above will be described.

When the drive device 6 is activated and the endless chain 3 is circulated, the rake 10 rises along the dust removing grid 1 as in the conventional case, and lifts the dust retained on the dust removing grid 1. At this time, the endless chain 3 has the guide rails 16,1
7, 18 and the guide rollers 12, 13, 14 of the rake arm 8 are guided by guide rails 19, 20, 21.

Here, the guide rollers 1 by the guide rails 19, 20, 21
Explaining the guide situation of 2,13,14 in detail, when the guide roller 12 pivotally attached to the pivot shaft 7 comes off the lower end of the inner guide rail 19, it immediately enters the circular arc orbit of the endless chain 3 and follows the sprocket wheel 5. In this way, it reaches the ascending side U and is guided by the outer guide rail 20 to ascend.

However, since the guide rollers 13 and 14 are free with respect to the endless chain 3, when they come off the lower end of the inner guide rail 19, they descend by gravity until they come into contact with the outer arc-shaped guide rail 21. Therefore, the first arm portion 8a rotates with respect to the pivot 7, and the second arm portion 8b bends with respect to the first arm portion 8a as shown in FIG. It moves from the side D to the ascending side U, and then is guided by the outer guide rail 20 to ascend.

The rising rake 10 is caught in heavy trash and rakes
When an excessive load is applied to 10, the rake arm 8 is moved to the upstream side as shown in (a), (b), or (c) of FIG. 2 at the part of the pivot 7 and / or the connecting pin 9 (joint part). It rotates or bends and automatically disengages from the trash, rises while avoiding the trash, and continues exercise. Since a plurality of joints are provided, even if some of the joints are obstructed from rotating due to dust or the like, the rake can be accurately separated and rotated by the movement of the other joints.

In addition, as a countermeasure when the rake 10 does not come off from the dust for some reason, the abnormality is detected by an appropriate detection means, and once the balance between the power of the rake and the dust is broken, the rake is again removed. Although a rational operation method is adopted in which it is possible to circulate in the normal direction and try to lift the dust again, in such a case, or in such a case or during reverse operation of the endless chain 3 for maintenance or the like, the rake arm 8 is used. Even in the bent state, the auxiliary guide rail 22 guides the guide roller 14 to accurately shift from the ascending side U to the descending side D.

The rake arm 8 of the above embodiment has two arm portions 8a and 8a.
Although b is flexibly connected by the connecting pin 9, three or more arm portions may be flexibly connected by two or more connecting pins. Further, although the second arm portion 8b is prevented from excessive rotation by the stopper member 8c,
Other over-rotation preventing means can also be used.

〔The invention's effect〕

As described above, the dust removing device of the present invention is wound around the dust removing grid that is provided diagonally across the water channel and has the upper portion on the downstream side and the lower portion on the upstream side, and a pair of upper and lower sprocket wheels. And a pair of left and right endless chains rotatably provided on the upstream side of the dust removal grid, and a plurality of arm portions flexibly connected by connecting pins in a plane orthogonal to the surface of the dust removal grid. At least a pair of left and right rake arms pivotally attached to each of the endless chains individually by pivots, and a rake horizontally supported at the free ends of the pair of left and right rake arms;
A drive device that circulates the endless chain to raise the rake along the dust removal grid to lift up the dust retained on the dust removal grid by the rake, and is disposed below the lower sprocket wheel, The outer arc-shaped guide rails for guiding the guided members provided on each arm and the upper part of the lower sprocket wheel are installed almost vertically, and when the endless chain is rotated in reverse, it descends in a bent state along the dust removal grid. And an auxiliary guide rail that receives the guided member of the rake arm and guides it to the downstream side portion of the outer arc-shaped guide rail, and the rake arm is pivoted and bent to the upstream side at the joint portion of the pivot and the connecting pin. Therefore, if excessive trash is applied to the rake, some of the joints above Even be as inhibit rotation I, rake off the accurately waste acids, it does not cause to fail dust remover.

In addition, since the outer arc-shaped guide rail guides the guided member of the bendable rake arm by the sprocket wheel, the rake is moved from the descending side to the ascending side in a predetermined state to ensure that the debris that has settled in the water channel is removed. Can be salvaged.

Furthermore, since an auxiliary guide rail is provided, if the rake does not come off from the dust, the abnormality is detected by an appropriate detection means, and once the balance between the rake and dust power is broken, It is possible to improve the dust removal function by adopting a rational operating method that makes it possible to re-circulate in the normal direction again and try to lift the dust again.If necessary, the rake can be freely reversed for maintenance. It is also possible to easily perform inspections and the like.

[Brief description of drawings]

FIG. 1 is a side view of a dust remover according to the present invention, FIG. 2 is a side view of a rake arm, FIG. 3 is a cross-sectional view showing how the rake arm is attached to an endless chain, and FIG. 4 is a guide rail and an endless chain, and FIG. 5 is a sectional view showing the relationship between the guide rail and the guide roller, FIG. 5 is a sectional view of the sprocket wheel, and FIG. 6 is an enlarged detailed view of a VI portion in FIG. 1 ... Dust removal grid, 2 ... Waterway 3 ... Endless chain, 4,5 ... Sprocket wheel 6 ... Drive device, 7 ... Axis 8 ... Rake arm, 8a, 8b ... Arm part 9 ... Connecting pin , 10 …… rake 13,14 …… guide roller (guided member) 21 …… outside arc guide rail, 22 …… auxiliary guide rail

Claims (1)

[Claims] 1. A dust removal grid (1) diagonally provided across a water channel (2), with an upper part on the downstream side and a lower part on the upstream side.
A pair of left and right endless chains (3, 3) wound around a pair of upper and lower sprocket wheels (4) and rotatably provided upstream of the dust removing grid (1), and the dust removing grid (1). ) Is provided with a plurality of arm portions (8a, 8b) connected by a connecting pin (9) so as to be bendable in a plane orthogonal to the plane, and is pivotally attached to each endless chain (3) so as to be rotatable in the orthogonal plane. At least a pair of left and right rake arms (8, 8) individually attached in (7), a rake (10) horizontally supported at the free ends of the left and right rake arms (8, 8), and the endless chain A drive device (6) that circulates (3, 3) to raise the rake (10) along the dust removing grid (1) and lift up the dusts locked on the dust removing grid (1) by the rake (10). And arranged below the lower sprocket wheel (5), Each arm portion of the serial Rekiamu (8) (8a, 8b) outer arc-shaped guide rail (21) for guiding the guided member (13, 14) provided in the
And the upper part of the lower sprocket wheel (5) provided substantially vertically, and when the endless chain (3) is rotated in the reverse direction, the rake arm (8) is lowered along the dust removal grid (1) in a bent state. A dust remover comprising: an auxiliary guide rail (22) that receives a guide member (14) and guides it to a downstream portion of the outer arc-shaped guide rail (21).