JP3316474B2 - Basket for dust remover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a basket for a dust remover used for a dust remover such as a traveling screen for removing dust in an intake channel or the like.

[0002]

2. Description of the Related Art Conventionally, a large amount of seawater is taken as cooling water in a nuclear power plant, a thermal power plant, or the like. However, traveling dust is used as a dust remover for removing dust in seawater in such an intake channel. Screens are often used. This traveling screen winds an endless chain between a pair of left and right lower sprockets arranged underwater in an intake channel and a pair of left and right upper sprockets arranged above the water surface, and a basket having a filter body on the endless chain. Attached, the circulating movement of the endless chain is configured to capture dust when the basket rises in the water, and to drop and discharge the captured dust to a dust trough or the like when the basket is inverted above the water surface. I have.

In such a traveling screen, easily deformable soft dust such as jellyfish and cloth pieces floating in the sea, bags made of polyethylene, synthetic fiber sheets, etc., forms a filtering surface of a filter formed of a metal net or the like. When the coating is applied in close contact with the surface, there is a risk that a water flow obstruction occurs and a sufficient water flow area cannot be secured.

In view of the above, conventionally, a large number of flat bars and the like are provided side by side at predetermined intervals on the upstream side of the filtration surface of such a filter so that soft dust can directly contact the filter. There has been proposed a configuration for preventing the noise (Japanese Unexamined Patent Publication No.
-42132, JP-A-10-68115,
JP-A-10-159061 and the like).

[0005]

By the way, in such a dust remover, the dust is removed by scooping and discharging the dust caught by each basket onto the water surface, so that each basket can be scooped. The transportable volume (the amount of treated water) is used as one of the performance evaluation indices indicating the dust removal processing ability. However, in the conventional dust remover basket, the carryable capacity of each basket for scooping was not sufficiently secured,
In summer, when a large amount of jellyfish is generated due to low dust removal capacity, this large amount of jellyfish can not catch up,
As a result, jellyfish stay on the upstream side of the dust remover,
There was a problem that the amount of water intake was reduced.

Further, the conventional dust collector basket has a generally complicated structure, is difficult to manufacture, and has increased in weight with an increase in the number of parts.

Further, the blockage prevention plate is excellent in preventing adhesion of soft dust and securing a water-passing area, but has a structure that complicates the structure and increases the weight.
Therefore, after weighing the permissible complexity of the structure, the required water flow area, and the difficulty or importance of ensuring different water permeability for each filtration surface, the blocking prevention means such as the blocking prevention plate is used. It is desirable to provide. However, such studies have not been sufficiently conducted in the past, and an unnecessarily blocking plate was attached to all of the filtration surfaces, resulting in a complicated structure and an increase in weight, or a sufficient blocking prevention means. However, there is a problem that a necessary water flow area cannot be secured and water flow obstruction occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a simple structure and a light weight structure, while ensuring a sufficient amount of treated water in each basket to realize a high dust removal processing capability. An object of the present invention is to provide a basket for a dust remover that can be manufactured at low cost and that can always secure a necessary and sufficient water passage area and prevent blockage due to soft dust and the like.

[0009]

A basket for a dust remover according to the present invention is disposed in a water intake passage so as to extend substantially vertically through a water surface, and to a pair of left and right endless chains circulating and moving. Attached so as to traverse the intake channel, with the endless chain circulating, capture dust in the intake channel when ascending, and drop and separate the captured dust when inverted above the water surface for a dust remover. A basket, a left and right end plate attached to the endless chain, a pipe beam having both ends fixed to the uppermost position of the both end plates in a rising posture of the dust remover basket, and a downstream side from the pipe beam. An intermediate beam having both ends fixed to both end plates and having a substantially L-shaped cross section, It has a downward slope extending from a lower position on the flow side to a lowermost position of the both end plates, and has a rising slope bent approximately 90 degrees upward from the lowermost position of the both end plates toward the upstream side. A dust removing bucket body, an upper mesh body stretched between the pipe beam and the intermediate beam, and a lower mesh body stretched between the intermediate beam and the downwardly inclined portion of the dust bucket body, A plurality of blocking prevention members are provided side by side at a predetermined interval on the upstream surface side of the upper net body, and upper and lower ends are respectively fixed to the pipe beam and the intermediate beam, and a front edge of the dust bucket body. The intermediate beam and the intermediate beam are provided at substantially the same height (claim 1).

According to such a configuration, the front edge of the dust removing bucket body and the intermediate beam are provided so as to be located at substantially the same height, so that the cross-sectional area of the horizontal section including the front edge of the dust removing bucket body is provided. Is the largest in the horizontal section of each part of the basket. And in such a basket for dust collectors, the volume of the area below the horizontal plane including the front edge of the garbage bucket main body is the transportable volume that each basket can scoop up, that is, the amount of treated water per basket. Therefore, according to the basket for a dust remover of the above configuration according to the present invention, the area having the maximum transportable area includes the portion having the largest horizontal cross-sectional area, thereby securing a sufficiently large transportable volume, High dust removal capacity can be obtained.

Further, in the basket for a dust remover, since the dust removing bucket body and the intermediate beam to be bent are both formed by bending at approximately 90 degrees, which is easy to process, manufacturing of each member including the bending is performed. The cost can be reduced, and the coupling angle of each member is also approximately 90 degrees.
Since they can be unified at any time, the structure can be simplified and the assembling work can be simplified.

Further, the dust collector basket catches dust in the water while ascending, so that the main water flow passes from the upper side of the dust collector basket to the lower side of the downstream side. . Therefore, more water flows in the lower mesh than in the upper mesh in the basket for dust collectors, and the adhesion of soft dust to the lower mesh easily proceeds. For this reason, even if the lower net body is provided with the blockage preventing member, it is not always possible to secure a water-permeable state when a large amount of jellyfish is generated. According to the basket for a dust remover having the above-described configuration according to the present invention, since the blockage prevention member is provided on the upper net body on which the adhesion of the soft dust is difficult to proceed, a water passage area required for the basket in the upper net body is provided. Can be reliably ensured, and the lower net, which cannot always ensure the water-passing state, is not provided with the blockage preventing member, so that the configuration can be simplified and the weight can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a basket for a dust remover according to the present invention will be described below with reference to FIGS. 1 is a side view of the basket for a dust remover, FIG. 2 is a partially cutaway front view of the basket viewed from the direction A in FIG. 1, and FIG. 3 is viewed from the direction B in FIG. FIG. 4 is a rear view of the basket, FIG. 4 is a bottom view of the basket viewed from a direction C in FIG. 1, and FIG.
6 is a sectional view taken along the line EE in FIG. 2, and FIG. 7 is an overall schematic view of a dust remover (traveling screen) to which the basket is attached.

As shown in FIG. 7, the basket 10 for a dust remover is used for a dust remover such as a traveling screen provided in the water intake passage W. The traveling screen includes a pair of left and right endless chains 60 arranged near the right and left banks of the water intake channel W so as to penetrate the water surface S and extend in a substantially vertical direction. W, a lower sprocket 50 disposed near the water bottom, and upper first, second, and third sprockets 5 disposed above the water surface S of the intake channel W.
2, 54, 56, these sprockets 50,
A circular movement operation is performed by the rotation operation of 52, 54, 56. And this endless chain 6
The dust remover baskets 10 attached to the upper sprocket catch the dust in the water when ascending in the water with the circulating movement of the endless chain 60, and move between the upper first sprocket 52 and the upper second sprocket 54. At the time of inversion, the trapped dust is dropped and separated into a dust trough 77. Reference numeral 70 denotes a lower guide portion for preventing the passage of unfiltered water at the bottom of the water intake passage W, reference numeral 71 denotes its guide plate, and reference numeral 75 denotes a dust trough 77 which drops dust separated from the dust collector basket 10. This is a dust chute plate that leads to

Hereinafter, the configuration of each part of the basket 10 will be described. In addition, the positional relationship and direction of each part
For convenience of explanation, the vertical direction or the like of the state in which the dust collector basket 10 is in the up position (the state of FIG. 1) will be used.

As shown in FIG. 2 and the like, a substantially rectangular end plate 2
2 and 22 are provided. In this end plate 22,
Two chain connection holes 221 and 221
Is provided.
The endless chain 60 is mounted in mounting holes 62 provided in each link (see FIG. 7). In addition, 222 secures an interval between the end plate 22 and the endless chain 60, and
The spacer is a spacer fixed to the outer surface of the end plate 22 in order to obtain a strength of 1.

At the uppermost position of the left and right end plates 22, 22 of the basket 10, a pipe beam 20 whose both ends are fixed to both end plates 22, 22 by welding is laid. Since the pipe beam 20 is formed of a cylindrical member having high bending rigidity, the left and right end plates 22 are firmly connected to each other to increase the strength of the entire basket 10.

The lower portion of the pipe beam 20 is slightly downstream (right side in FIG. 1) from the position immediately below the pipe beam 20.
A plate-like member 26 extending in the width direction is fixed by welding. The left and right ends of the plate member 26 are fixed to the end plates 22, 22 by welding.

An intermediate beam 28 having a substantially L-shaped cross section is disposed at a position below and downstream of the plate member 26 fixed to the pipe beam 20 (right side in FIG. 1). The left and right sides of the intermediate beam 28 are end plates 22, 2
2 is fixed to the rearmost position by welding.

At the lower part on the front side (upstream side) of the end plates 22, 22, a dust bucket body 24 for holding dust picked up by the basket 10 is arranged. The garbage bucket body 24 is connected to the intermediate beam 28.
From the lower position on the more upstream side, both end plates 22, 22
Of the end plates 22 and 22 from the lowermost position of the end plates 22 and 22 toward the upstream side.
And a rising inclined portion 242 bent and raised by 0 degrees. Also, the left and right sides of the dust bucket body 24 are fixed to the end plates 22 by welding. The garbage bucket body 24 has a rising slope 2
The leading edge of 42 is arranged so as to be located at substantially the same height as the intermediate beam 28.

Between the plate-like member 26 fixed to the pipe beam 20 and the intermediate beam 28, an upper net 40 formed of a metal net is stretched. The upper net 40 is a filter for filtering dust. As shown in FIG. 3, the upper net body 40 is pressed by a pressing plate 41 from obliquely above the rear side of the basket 10, and the pressing plate 41 is provided at predetermined intervals by mounting bolts. It is attached to the member 26 and the intermediate beam 28.

A lower net 45 formed of a metal net is stretched between the intermediate beam 28 and the downwardly inclined portion 241 of the dust bucket body 24. As shown in FIG. 4, the lower net 45 is pressed by a pressing plate 46 from obliquely below the back side of the basket 10, and the pressing plates 46 are attached at predetermined intervals by mounting bolts 47 to the intermediate beam. 28 and the refuse bucket body 24 are attached to the downwardly inclined portion 241.

As shown in FIG. 2, a plurality of blocking prevention bars 30 are provided on the upstream side of the upper net 40 extending between the plate-like member 26 and the intermediate beam 28. They are juxtaposed at intervals (about 5 to 20 cm). As shown in FIG. 5, the blocking prevention bar 30 prevents the upper net 40 from being lost in the water permeability of the upper net 40 due to the soft net dust such as jellyfish covering the upper net 40 closely. Blocking prevention means. The upper end of the blocking prevention bar 30 is fixed to the pipe beam 20 and the plate-like member 26 by welding, and the lower end is fixed to the intermediate beam 28 by welding.

In this embodiment, the intermediate beam 28
2 to reinforce the connection between the main body and the dust removing bucket body 24.
As shown in FIG. 6 and FIG. 6, some of the positions where the blocking prevention bar 30 is to be disposed (three positions in this embodiment).
Is provided with a reinforcing member 35 made of an L-shaped plate in place of the blockage prevention bar 30. This reinforcing member 3
5 is fixed to the pipe beam 20, the plate-like member 26, the intermediate beam 28, and the dust bucket main body 24 by welding. The reinforcing member 3
5 constitute a part of the blocking prevention means together with the blocking prevention bars 30 at the front position of the upper netting 40, but the front positioning portion of the lower netting 45 This is for the purpose of firmly coupling with the intermediate beam 28, and does not constitute blocking prevention means for the lower net 45 because the reinforcing members 35 at this portion are widely spaced.

Next, the dust removing action of the dust remover basket 10 thus configured will be described.

As described above, the dust remover basket 10 is attached to the endless chain 60 of the dust remover such as a traveling screen, and circulates in the water and on the water surface as the endless chain circulates. (See FIG. 7). Then, when ascending in the water, the water flow entering from the upper opening portion 11 on the front side (upstream side) of the basket 10 is filtered by the upper net 40 and the lower net 45 to capture dust in the water, and Between the upper first sprocket 52 and the upper second sprocket 54 of this opening 11
When is turned downward, the dust trapped on the dust trough 77 via the dust chute plate 75 falls and is discharged.

By the way, the maximum amount of dust that can be picked up by the dust collector basket 10 is, as shown in FIGS. 5 and 6, the volume of the area below the horizontal plane S1 including the front edge of the dust bucket body 24. (Portable volume), and this volume is the amount of treated water that can be treated by one dust collector basket 10.

In the dust collector basket 10, as described above, the front edge of the dust removing bucket body 24 and the intermediate beam 2
8 are positioned so as to be located at substantially the same height.
1 is the largest in the horizontal section of each part of the basket 10. That is, in the basket 10 for a dust remover, the portion having the maximum horizontal cross-sectional area is included in the area forming the transportable volume. For this reason, in the dust collector basket 10, a very large transportable volume is secured, and a high dust removal processing capability can be obtained.

Therefore, this dust collector basket 10
According to the report, even in summer when a large amount of jellyfish occur,
Due to this sufficiently high dust removal processing capacity, it is possible to reliably capture and remove jellyfish without retaining the jellyfish on the upstream side of the dust remover, and to always secure a stable water intake amount.

Further, the basket 10 for a dust remover having the above-mentioned structure is provided.
In this embodiment, both the end plates 22 and 22 are formed in a substantially rectangular shape, and the intermediate beam 28 and the dust removing bucket main body 24 that need to be bent are both formed at a bending angle of approximately 90 degrees. For this reason, the manufacturing cost can be kept low for any part. Also,
Since the coupling angles of the respective members are unified to about 90 degrees, the structure is simple, the assembling work is facilitated, and the assembling cost can be reduced.

The dust collector basket 10 catches dust while ascending in the water.
It enters the basket 10 from the opening 11 of the basket 10 and escapes to the lower net 45. Therefore, soft dust such as jellyfish easily adheres to the lower net 45, and there is a high possibility that the dust will be blocked. Especially in summer when a large amount of jellyfish is generated, the lower net 45 is used.
Even if a conventionally known blockage prevention means such as a blockage prevention plate is provided in the portion, the effect cannot always be expected, and only the structure becomes complicated and the weight increases. On the other hand, since the upper net 40 is stretched substantially parallel to the main water flow direction, soft dust is less likely to adhere to the lower net 45 and blockage is less likely to occur.

In the basket 10 for dust collectors, since the blocking prevention bar 30 serving as a blocking prevention means is juxtaposed on the upstream side of the upper netting 40 which is originally unlikely to be clogged. Regarding 40, water permeability can be ensured, and even if the lower net 45 is closed in summer or the like when a large amount of jellyfish occurs, the water passing area in the upper net 40 can be ensured. Thereby, a necessary and sufficient water-passing area can be always secured as a whole for the dust collector basket 10.

In addition, since the lower net 45 is not provided with a blocking preventing bar or the like serving as blocking preventing means, it is possible to realize a simpler structure and a lighter weight as compared with a conventional dust collector basket. It can be done.

Although the present invention has been described with reference to the embodiments, the basket for a dust remover according to the present invention is not limited to the above embodiments, and may be configured as follows.

(1) In the above embodiment, the pipe beam 20, the plate-like member 26, the intermediate beam 28, and the
Although 4 and the like are fixed by welding, they may be assembled by any known fixing means such as a bolt and nut connection.

(2) In the above embodiment, the upper net 40 and the lower net 45 are held down from the downstream side (back side) by the holding plates 41, 46, and are attached. .., 46... May be directly attached to the pipe beam 20 or the like by any attachment means such as welding or bolt / nut coupling.

(3) In the above embodiment, the upper net 40 and the lower net 45 are formed of different nets.
The upper net 40 and the lower net 45 are connected to the intermediate beam 28.
Of the dust removing bucket main body 24 from the plate-like member 26 fixed to the pipe beam 20. When the upper net 40 and the lower net 45 are integrally formed in this way, this net does not necessarily have to be attached to the intermediate beam 28 with bolts or the like.

[0038]

As described above, according to the basket for dust collector according to the present invention, the front edge of the dust bucket main body and the intermediate beam are provided so as to be located at substantially the same height. The largest cross-sectional area of the horizontal section including the front edge of the main body can be ensured. Accordingly, a sufficiently large transportable volume of each basket, that is, a treated water amount, defined by a region including the horizontal cross-sectional portion including the front edge of the dust removing bucket body can be ensured, and a high dust removing capacity can be obtained.

Further, in this dust collector basket, the dust removing bucket body and the intermediate beam to be bent are both formed by bending at approximately 90 degrees, which is easy to process, so that the manufacturing cost including this bending is reduced. And the coupling angle of each member can be unified to about 90 degrees, so that the structure can be simplified and the assembling work can be facilitated.

Further, since the blockage preventing member is provided on the upper mesh body where the adhesion of the soft dust is less likely to proceed, it is possible to reliably secure a necessary water-passing area for the basket in the upper mesh body. Since the lower net, which cannot always ensure the water-passing state, is not provided with the blockage preventing member, the configuration can be simplified and the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a basket for a dust remover according to the present invention.

FIG. 2 is a front view of the dust remover basket viewed from a direction A in FIG. 1;

FIG. 3 is a rear view of the basket for the dust remover as viewed from a direction B in FIG. 1;

FIG. 4 is a bottom view of the dust collector basket as viewed from a direction C in FIG. 1;

FIG. 5 is a cross-sectional view of the dust remover basket as viewed in the direction of line DD in FIG. 2;

FIG. 6 is a cross-sectional view of the dust collector basket as viewed in the direction of line EE in FIG. 2;

FIG. 7 is an overall schematic view of a traveling screen provided with the basket for the dust remover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Dust remover basket 20 Pipe beam 22 End plate 24 Dust remove bucket main body 28 Intermediate beam 30 Blocking prevention bar 40 Upper netting 45 Lower netting 60 Endless chain

Claims (1)

(57) [Claims] In an intake channel, a pair of left and right endless chains are provided so as to extend in a substantially vertical direction through a water surface, and are attached to a pair of left and right endless chains so as to cross the intake channel. Along with the circulation movement of the chain, a dust collector basket that captures dust in the intake channel at the time of ascending and drops and separates the captured dust when reversing above the water surface, the left and right sides attached to the endless chain. An end plate, a pipe beam having both ends fixed to the uppermost position of the both end plates in a rising posture of the dust remover basket, and both ends fixed to both end plates at a lower position downstream of the pipe beam. An intermediate beam having a substantially L-shaped cross section, and a lowermost part of both end plates from a lower position on the upstream side of the intermediate beam. And a dust removing bucket body having a rising slope bent approximately 90 degrees upward from the lowermost position of the both end plates toward the upstream side, and the pipe beam and the intermediate beam. An upper net extending between the intermediate net and the lower inclined portion of the garbage bucket main body; a lower net extending upstream of the upper net with a predetermined space therebetween. Side by side,
Upper and lower ends respectively include a plurality of blockage preventing members fixed to the pipe beam and the intermediate beam, and the front edge of the garbage bucket main body and the intermediate beam are provided at substantially the same height. A basket for a dust remover.