JP2003013489A - Dust recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover dust falling in a hole in a water way by a simple facility in the water way for a water treatment facility such as a pump facility. SOLUTION: The hole 4 is formed in the upstream of a dust collector 10, a basket-shaped dust recovery vessel 6 capable of being housed in the hole in an extractable manner is installed, large dust increasing the load of the dust collector 10 is dropped, and the dust recovery vessel 6 is hung up by a chain block 8d or the like having a hook 8a at a front end and carried out from the water way. Accordingly, a sand pump or the like is not required, and a dust recovery device is economical and simple.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting apparatus for separating and collecting dust such as gravel and concrete fragments flowing in a waterway from a water stream.

[0002]

2. Description of the Related Art Rainwater, domestic wastewater, and other sewage are sent to a sewage treatment plant through sewers, undergo various treatment processes, and then discharged into rivers in proper conditions. This sewage is carried by natural flow, but cannot be carried only by natural flow when the transfer route is long. Therefore, in such a case, a pump for pumping water is attached in the middle of the route, and the sewage is pumped up to near the surface of the earth to send the water. A facility equipped with a pump (hereinafter referred to as a pump facility) is usually provided with a dust remover, a crusher or the like in order to prevent damage to the pump and reduce the load of the pump. Further, these devices are mainly intended to remove suspended dust, and if a large amount of gravel or the like flows in, the load becomes large and there is a possibility of damage. Therefore, a gravel trap or the like is provided to prevent this damage. Note that this gravel reservoir is a hole formed in the bottom of the waterway, and drops and deposits gravel such as gravel and concrete pieces in wastewater. Then, the accumulated dust is conventionally collected and removed by a sand pump, a sand settler, or the like.

[0003]

However, in the conventional apparatus, even in a pump facility or a small-scale pump facility in which a large amount of dust is not mixed originally, a sand pump for collecting dust from the hole in the gravel reservoir or a sand pump. There is a problem in that it requires an excessive amount of equipment such as a sedimentation separator, which makes the equipment very uneconomical. In addition, in order to eliminate these uneconomical cases, vacuum may be carried out, but if there is a head difference of 10 m or more, it is not possible to carry out dust and further carry out large gravel etc. It was difficult.

Therefore, an object of the present invention is to propose a dust collecting apparatus which can be installed economically and easily without requiring excessive equipment. In addition, even if relatively large dust such as concrete debris or relatively large gravel is mixed in the water channel of a water treatment facility such as a pump facility, the dust recovery function can be maintained well and the function does not stop. The purpose is to propose a recovery device.

[0005]

In order to solve the above-mentioned problems, in the invention according to claim 1, there is provided a dust collecting apparatus attached to a water channel, the hole being provided in the water channel, A dust collection container that is removably mounted inside the hole and that stores dust that falls into the hole, and a carry-out means that carries out the dust collection container from the water channel. Therefore, the dust collected in the water stream falls into the hole when passing over the hole provided in the waterway, and is stored in the dust collection container installed in the hole. It is possible to collect the dust by carrying it out of the waterway using the carrying-out means. Therefore, it is not necessary to pump up the dust that has fallen into the hole using equipment such as a sand pump. Further, even a pump facility having a large head difference can be easily recovered, and even relatively large dust can be recovered as long as it falls into a dust collection container.

Further, in the above dust collecting apparatus, a dust removing device for removing floating dust in the water flow by providing a screen member in the water channel substantially orthogonal to the water flow direction, and a crushing means to remove the floating dust in the water flow. It may be provided with a floating dust disposal means such as a crusher for finely crushing, and the hole for mounting the dust collection container may be provided on the upstream side of the floating dust disposal means. By configuring in this way, in the dust collection container installed in the hole provided upstream of the dust remover, crusher, etc.,
It is possible to collect a relatively large dust in a dust remover, a crusher, etc., upstream of the dust remover, a crusher, etc. Moreover, since a sand pump etc. are not required for collection,
This protective measure can be implemented economically.

[0007] Further, a dust blocking means for blocking the inflow of dust into the hole may be provided at the edge of the opening of the hole, which is located upstream of the water flow, in conjunction with the carry-out operation of the dust collecting container. Good. With such a configuration, it is possible to prevent the dust from flowing into the hole after the dust collection container is carried out, so that the dust may flow into the hole while the dust collection container is carried out. Absent. Therefore, when the dust collection container is attached again, it is possible to prevent the dust from becoming an obstacle and being unable to be attached in an appropriate state.

According to the invention described in claim 2, in addition to the invention described in claim 1, a plurality of the dust collection containers are stacked in the hole and stacked. With this configuration, since a plurality of dust collection containers are stacked in advance in the hole, even if the uppermost dust collection container is carried out from the waterway, the next dust collection container is still mounted below it. At least until the last dust collection container is carried out, even if new dust is mixed in during the carry-out work, it can be collected without leaking the dust.

According to a third aspect of the invention, in addition to the first aspect of the invention, a shielding means for shielding the opening of the hole is provided in conjunction with the unloading operation of the dust collection container by the unloading means. . Therefore, since the opening of the hole is shielded while the dust collection container is being carried out, the dust does not drop into the hole. Therefore, when the dust collection container is attached again, it is possible to prevent the dust from becoming an obstacle and being unable to be attached in an appropriate state.

In addition to the invention described in claim 1, a retractable or deformable shield member attached so as to cover the opening of the hole, and a fluid injection means for injecting a fluid into the hole are provided. When the dust collection container is mounted in the hole, the shielding member is pushed into the hole, and when the dust collection container is taken out, the shielding member is projected and opened by injecting a fluid by the fluid injection means. You may make it close a part. With this configuration, when fluid such as air or water is injected into the hole by the fluid injecting means into the hole, and the dust collection container is taken out, it can be expanded or contracted or deformed while being pushed into the hole. A transparent shielding member can be bulged out to fill the hole volume with the infused fluid. Therefore, it is possible to shield the hole and prevent the dust from falling into the hole when the dust collection container is carried out.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view showing a first embodiment of a dust collecting apparatus according to the present invention.

In the sewage treatment pump facility shown in FIG. 1 equipped with the dust collecting apparatus according to the present invention, for example, the building is divided into two layers, and a treated water channel 19 for flowing sewage is formed in the lower layer, and an upper layer. Is provided with an upper room 18 in which machines and the like are installed.

The lower treated water channel 19 is located on the left side of the figure, and is a main water channel stop gate 1 for controlling the inflow of sewage.
A canal that starts from and ends at the pumping sump 17 on the right side of the figure, which is formed by a concrete wall in the building 3
This is a channel for collecting and processing dust and floating dust such as concrete pieces, gravel, and dirt by flowing sewage into the area. Sewage collected in the most downstream pumped water reservoir 17 is pumped through a pipe 16 by a pump 15 provided at the bottom of the pumped water.

In the upper layer of the building, there are provided a carrying-out means 8 for lifting, moving and carrying out the collected dust, and a container 12 for discharging the floating dust collected from the water stream from the pump facility.

Next, the dust collecting device provided in the treated water channel 19 will be described in order from the upstream side of the water channel. First,
In the dust collecting device provided in the water channel 3, a hole 4 extending in a direction substantially orthogonal to the flow direction of the sewage flow is provided in the water bottom of the water channel 3, and a hole is collected in order to collect dust falling in the hole 4. The dust collecting container 6 is attached so as to be formed substantially along the shape of 4 and can be taken out upward. A wire rope 6d for lifting and moving the dust collection container 6 is provided on the upper part of the frame.

The dust collecting container 6 is made with sufficient strength so that dust falling into the hole 4 can be collected. As an example, a basket-shaped container in which a metal net is stretched around a steel frame can be used. Considering the size of the dust to be collected, the mesh of the wire mesh should be set to a roughness that does not spill.

As a means for unloading the dust collection container 6, the unloading means 8 installed in the upper room 18 is used. The carry-out means 8 is
As shown in FIG. 1, a chain 8b having a hook 8a at its tip is wound up by a chain block 8d and lifted by a simple device.

Downstream of the hole 4, a screen grating is provided in a direction transverse to the water flow flowing in the water channel 3, and a dust remover 10 for catching suspended dust in the water flow is installed.

Next, the operation of the first embodiment having the above-mentioned structure will be described. The dust particles 5 such as concrete pieces and large-sized gravel mixed in the water channel 3 fall into the dust particle collecting container 6 housed in the hole 4 provided in the water channel 3 due to its mass, and are captured there. It will be accumulated.

When the dust 5 has accumulated to some extent in the dust collecting container 6, the hook 8a of the carry-out means 8 is unloaded from the upper chamber 18, and the hook 8a is hung on the wire rope 6d as shown in FIG. The dust 5 accumulated in the dust collecting container 6 can be removed from the water channel by pulling it up to the upper chamber 18. Since the dust collection container 6 is configured to allow sewage to permeate through the wire mesh, the dust 5 is drained in the process of being pulled up from the water channel 3 and collected. After the dust collection container 6 is cleaned, it can be returned to the hole 4 by the carrying-out means 8 again and used again for collecting dust.

Next, the relatively lightweight dust particles mixed in the water flow of the dirty water flowing through the water channel 3 are captured by the screen grid when the water flow passes through the screen grid of the dust remover 10. The relatively lightweight dust trapped in the screen grid is scraped from the screen grid by a rake device (not shown), discharged into the container 12 provided in the upper chamber 18, and removed from the water channel.

As described above, according to the first embodiment, the dust 5 accumulated in the hole 4 provided as a gravel reservoir is collected by the dust collecting container 6 and the chain block 8d for carrying it out. With the dust collecting device having a simple structure including the carrying-out means 8, it is possible to collect and remove the dust from the water channel. For this reason, even in a pump facility that is originally less contaminated with dust, it is possible to install a small-scale, economical and simple dust-recovery device without the need for excessive equipment such as a sand pump and a sand settler that were used in the past. did it.

Further, since the dust collecting device provided at the position of the hole 4 is provided upstream of the dust remover 10, it is possible to prevent the dust mixed in the water channel 3 from reaching the dust remover 10 and being captured, and thus the rake. The load on the device can be reduced, and the dust remover 10 can be prevented from deterioration and damage.

In the above description, the case where the dust remover 10 is provided in the water channel has been described, but it is also effective when a crusher for finely crushing suspended dust is placed. Also in this case, the waterway 3
It is possible to prevent dust and dirt mixed into the crusher from reaching the crusher and being trapped, reducing the load on the crusher and preventing its deterioration and damage.

The dust collecting container 6 has been described as a frame provided with a wire mesh. However, as a modification, if it is not necessary to provide a drainage function, the wire mesh portion of the dust collecting container 6 may be, for example, It may be formed in a box shape without a water draining structure using a metal plate or the like. By doing so, it is possible to capture fine dust that is mixed together with the large dust, and to prevent fine dust from accumulating in the hole and obstructing the reattachment of the dust collection container. In this case, since water that enters the container together with the dust is also carried out, it goes without saying that the carrying-out means 8 is provided and placed in consideration of the load at the time of carrying out.

The carry-out means 8 described above may be any means as long as it can carry out the dust collection container 6 together with the dust collected therein from the water channel. Further, the carry-out means 8 does not need to be provided exclusively for carrying out the dust collection container 6.

Hereinafter, another embodiment of the present invention will be described, but the same parts and members as those in the above-mentioned embodiment will be designated by the same reference numerals and the description thereof will be omitted. First, a second embodiment will be described with reference to FIG. The dust collection containers housed in the holes 4 may be mounted in a stack. FIG. 3 shows that the dust collection containers 6a, 6b, 6c are mounted in a stack and the dust collection container 6a at the top is pulled up when the dust 5 is accumulated. According to this structure, another dust collection container 6b is attached to the hole 4 while the top dust collection container 6a is being carried out.
Even if new dust particles fall and flow in, they are captured by the dust collection container 6b.

The dust collecting containers 6a, 6b, 6c may have exactly the same shape as shown in the drawing, but since they tend to be bulky in the height direction, for example, a basket-like shape may be formed so as to be nested. You can change it. Then, it is possible to increase the number of dust collecting containers that can be mounted in the holes 4.

The roughness of the mesh may be, for example, that of the dust collecting container 6c directly mounted in the hole 4, or the mesh may be omitted. By doing so, when the dust collection container 6c is finally carried out, fine dust left in the hole 4 can be reduced or eliminated.
Does not require additional cleaning. Further, as a result, a good wearing state can be maintained, and the dust collection function can be reliably maintained.

Next, as a third embodiment, FIG.
As shown in (a), dust blocking means may be provided on the upstream side of the hole 4. In this example, a blocking plate 19 made of a steel plate or the like is placed in the groove 21 provided along the edge of the hole opening to serve as a dust blocking means. An elastic restoring force is applied to the blocking plate 19 from below by a coil spring 20. In the state in which the dust collection container is set, the blocking plate 19 urged by the elastic restoring force contacts the dust collection container 6 and is pushed back into the groove 21 by the weight of the dust collection container 6, When the dust collection container 6 is carried out, as shown in FIG. 4 (b), the dust collection container 6 rises vertically upward from the groove 21 against the water flow in association with its operation, and the dust that flows from the upstream becomes a hole. It acts as a dust blocking means so as not to penetrate into No. 4. As a result, a good wearing state can be maintained, and the dust collection function can be reliably maintained.

Further, FIG. 5 shows a fourth embodiment showing another mechanism which can be adopted as the dust blocking means. The mechanism adopted here is a steel plate blocking plate 27a that is rotatably supported by a hinge 28 at the opening end on the upstream side of the hole 4 and is biased by an elastic restoring force by a torsion coil spring, a torsion bar, or the like. It comprises a lever 27b integrally formed with the blocking plate 27a at a predetermined angle.

In the state where the dust collecting container 6 is mounted in the hole 4, the lever 27b comes into contact with the dust collecting container 6 and is pushed downward by its own weight and is sandwiched between the dust collecting container 6 and the inner wall of the hole 4. At this time, the blocking plate 27a is substantially parallel to the direction of the water flow, and has a posture that does not prevent the dust 5 from flowing into the dust collecting container 6 (FIG. 5 (a)), and the dust collecting container 6 is pulled up. In the state, under the action of the elastic restoring force urged by the blocking plate 27a, the blocking plate 27a rotates counterclockwise in the drawing against the water flow, and the blocking plate 27a is oriented almost vertically upward to block the water flow. The dust that flows from the upstream is hole 4
It acts as a means to prevent dust from entering the. As a result, a good wearing state can be maintained, and the dust collection function can be reliably maintained.

The blocking plates 19 and 27a may have a mesh shape or a comb-like shape so that fine dust that does not need to be blocked can be passed therethrough. It has the advantage of not receiving resistance.

Further, the blocking plates 19 and 27a are not limited to one continuous metal plate, but for example, a plurality of metal plates are arranged in a zigzag pattern with their ends overlapped with each other with a slight gap between them. It may be configured so that there is no gap when viewed from above.

As a fifth embodiment, as shown in FIG. 6, the hinges 21a and 21b can be rotated near the opening end of the hole 4 to apply elastic restoring force of a torsion coil spring, a torsion bar or the like. And shield plate 20 attached to hole 4
When a and 20b are provided and the dust collection container 6 is attached to the hole 4, the dust collection container 6 is pushed in by the dead weight of the dust collection container 6 as shown in FIG. When it is pulled up, the elastic restoring force acts, and
As shown in (b), the shielding plates 20a and 20b jump up to a position substantially parallel to the water channel to shield the opening of the hole 4. According to this structure, dust can be prevented from flowing into the hole 4 even while the dust collection container 6 is being carried out. As a result, a good wearing state can be maintained, and the dust collection function can be reliably maintained.

A sixth embodiment is shown in FIG.
As shown in (a), a sheet 22 provided with an air pipe 24 for sending compressed air into the hole 4 and provided with a rubber layer or the like so as to have no air permeability, and a sheet provided so as to cover the opening of the hole 4 It is fixed by the sealing portion 23. When the dust collection container 6 is pulled out by the unloading means 8 and is unloaded from the water channel 3,
Compressed air is sent from the air pipe 24 by a pump or the like so that high pressure air is held between the hole 4 and the sheet 22, and the sheet 22 is moved to the hole 4
So as to cover the opening of the hole 4. When the dust collection container 6 is attached, air is released from the air pipe 24, and the sheet 22 is pushed back along the inner wall of the hole 4 by the water pressure so that the dust collection container 6 can be attached. Therefore, when the dust collection container 6 is carried out, the hole is shielded, so that the dust does not flow into the hole 4. As a result, a good wearing state can be maintained, and the dust collection function can be reliably maintained.

The sheet 22 may be made of a stretchable rubber sheet, for example. In addition, as shown in FIG. 7B, instead of a single sheet, a bottom plate 25 made of a steel plate or the like having substantially the same size as the bottom of the hole 4 is used as the bellows sheet 26a,
It may be attached to the opening of the hole 4 via 26b. In this case, the bellows sheet 2 is sent together with the air pressure.
When 6a and 26b contract to reach a pressure equilibrium state with the water pressure, the openings can be closed by becoming substantially parallel to the bottom of the water channel. Further, in the above, an example in which the fluid to be pumped is compressed air supplied from the air pipe 24 has been described, but water may be supplied by a hydraulic pump.

Further, in the above description, the sheet 22 and the like are described as those that substantially close the hole 4 in the state in which the dust collecting container 6 is discharged, but since the dust does not have to enter the hole during the carrying-out operation, The sheet 22 and the like may have a shape protruding outside the hole 4.

[0039]

As described above, according to the first aspect of the present invention, it is possible to capture in the dust collecting container, including the relatively large dust mixed in the water stream, and the whole dust collecting container,
There is an effect that it is possible to provide an economical dust collecting container provided with a very simple carrying-out means that is carried out of the waterway.

According to the second aspect of the invention, even if new dust is mixed in during the unloading operation, it can be collected without leaking it, and the dust collecting function does not stop.

According to the third aspect of the invention, after the dust collecting container is taken out, it is possible to prevent the dust from falling into the hole, which has the effect of ensuring the collection of dust and the reattachment of the dust collecting container. is there.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of a dust collecting apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing an operation of the dust collecting apparatus according to the present invention.

FIG. 3 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a third embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a fifth embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a sixth embodiment of the present invention.

[Explanation of symbols]

3 waterways 4 holes 5 dust 6, 6a, 6b, 6c Dust collection container 8 carry-out means 10 dust remover 15 Pumping pump 17 Pumping pool 19, 27a Blocking plate 20a, 20b shield plate 22 sheets

Claims (3)

[Claims] 1. A dust collection device attached to a water channel, comprising: a hole provided in the water channel, and a dust collection container that is removably mounted inside the hole and that stores dust that falls into the hole. A dust collecting apparatus comprising: a carrying-out means for carrying out the dust collecting container from the water channel. 2. The dust collecting apparatus according to claim 1, wherein a plurality of the dust collecting containers are stacked and loaded in the hole. 3. The dust collecting apparatus according to claim 1, further comprising a shielding unit that shields the opening of the hole in association with the discharging operation of the dust collecting container by the discharging unit.