JP3811208B2 - Pollution prevention membrane device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water pollution prevention membrane device, and is suspended along a float and a longitudinal lower surface of the float in order to stretch in a direction intersecting with running water and prevent pollution of water passing therethrough. In particular, the present invention relates to a pollution control film device constituted by a film body.
[0002]
[Prior art]
The prior art will be described with reference to FIG. In the figure, A is a conventional suspended pollution control film, and B is a conventional submerged pollution prevention film. The suspension type pollution prevention film A is constituted by a float 1 exposed in the air on the water surface and a film body 2 suspended in water along the lower surface in the longitudinal direction of the float 1. The float 1 is wrapped in the float cover 3, and the underwater position is maintained by the buffer buoy 4 and the anchor block 5. The film body 2 is composed of a belt-like upper restraining belt 6 that is long in the side, a lower restraining belt 7, and a curtain 8 that connects the upper restraining belt 6, and the upper restraining belt 6 is engaged with the lower surface of the float 1, thereby 2 is in a suspended state with a gap between the lower restraining belt 7 and the bottom of the water. A lower weight 9 is attached to the lower restraining belt 7 so that the film body 2 can easily maintain a suspended state in water, and a certain depth along the curtain 8 is prevented in order to prevent the lower weight 9 from stirring the water bottom. An intermediate float 10 is provided at this position, thereby allowing an appropriate buoyancy to act on the film body 2.
[0003]
The submerged pollution prevention film B is installed to prevent the water pollution in the water surface or the water area relatively close to the water surface, while the suspension type pollution prevention film A controls the water pollution in the deeper water area. It is provided for the purpose of controlling the contamination of water in the bottom of the water or in a water area relatively close to the bottom of the water. Therefore, when water pollution occurs over the entire depth, two sets of anti-pollution films A and B are often used in combination. FIG. 5 shows an installation procedure for responding to such a request. The configuration of the submerged pollution prevention film B has a construction according to the suspended pollution prevention film A as shown in the figure. That is, the float 1, the upper restraining belt 6, the lower restraining belt 7, and the curtain 8 a having no intermediate float connecting between the lower restraining belt 7 and the lower restraining belt 7 are attached to the fixed weight 11 made of a shape steel. The entire apparatus is installed in a state where it rises upward from the bottom of the water due to the buoyancy of the float 1. Thus, the water flowing through the water area where the two sets of anti-pollution membranes A and B are stretched, the upper half of the water is controlled by the anti-pollution membrane A, and the lower half is the anti-pollution membrane. Pollution control is performed by B.
[0004]
[Problems to be solved by the invention]
In the case of controlling the contamination of water flowing in the direction intersecting these with the above-mentioned conventional apparatus, there are the following problems.
1) As in the case of the present invention, when water pollution is controlled by a pollution prevention film device standing in water, the target water is water flowing at least in a certain direction apart from the magnitude of the flow velocity. It needs to be. For this reason, as the material of the film body standing in the water, a permeable fabric such as polyester canvas is selected, and measures are taken to allow a certain amount of water to penetrate. However, if the work efficiency is to be further increased, the relative flow rate of water must be increased. However, if the flow rate is increased, only the amount of water flowing through the membrane body is in this case. As a result, the water flow pushes up the membrane body in a direction to bring it close to the horizontal state, and the water dives under the membrane body and bypasses. The state is shown in FIG. The arrow P in the figure shows a state in which the water flow pushes up the membrane body 2 and bypasses downstream where there is no membrane body 2. This means that the pollution control film device is not functioning at all. In addition, in this case, as is apparent from the figure, the intermediate float 10 is added to the effect of floating the membrane body 2 to prevent the bottom weight 9 as the original mission from occurring. It does not help to raise the effect.
[0005]
2) In the configuration of the above-mentioned conventional apparatus, the resistance to running water determined by the permeability characteristics of water generated from the fabric of the membrane body or the size or weight of the lower weight 9, the intermediate float 10, etc. is constant. For this reason, the flow rate at which the best results can be achieved in running water is limited to a constant value or a value close to the periphery, but the flow rate is, for example, the flow of a river or the tides of seawater. In the case of confronting with a membrane body having only the above-mentioned characteristics with respect to such a highly variable flow rate, the possibility of compatibility is extremely low. In that case, it is impossible to expect a match between the two.
[0006]
3) The distribution of the density and the like of the pollution on the depth of the running water is not constant and is very fluid, and therefore the position of the film body on the depth can be moved at any time correspondingly. Although required, in the configuration of the above-described conventional apparatus, it is impossible to move the position of the film body at any time corresponding to the distribution of contamination on the depth of running water.
[0007]
The present invention has been made in view of the disadvantages of the conventional device, and can automatically adjust the amount of flowing water passing through the membrane body over a wide range in response to fluctuations in the flow velocity. The optimal pollution control efficiency can be maintained at all times, and the installation position in the depth of the pollution prevention membrane device standing in water, that is, the installation height can be freely changed, and a single membrane body is used. However, it is an object of the present invention to provide a pollution control film device that can exhibit the highest pollution control effect at any depth.
[0008]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, in the pollution control film device according to the present invention, the pollution prevention system is installed in the water so as to be stretched in a direction intersecting with running water and to control the pollution of the passing water. A membrane device, comprising a float and a membrane body attached along the lower surface in the longitudinal direction of the float; By arranging a large number of curtain belts in close contact with each other between the upper restraining belt and the lower restraining belt and attaching the upper end of each curtain belt to the upper restraining belt and the lower end to the lower restraining belt. A slit-type film body comprising a large number of curtain belts laid in parallel, and when the film body is attached to the lower surface of the float and stretched in running water, With the adjacent curtain belts attached to the upper and lower restraining belts in response to excessive pressure, the unconstrained part between them opens to the left and right, allowing water to flow from the slits created between them. When the excessive pressure of the flowing water is digested and the flow velocity changes and the upstream pressure decreases, the curtain belts are temporarily spread by their own restoring force. The slit is deformed in a shrinking direction, and an intermediate weight for weighting the belt is provided in the middle of the curtain belt.
[0009]
When the anti-pollution membrane device is configured as described above, the adjacent curtain belts open to the left and right in response to fluctuations in the flow velocity, so that the running water escapes from the slits generated between them and the excessive pressure of the running water is digested. Therefore, it is possible to automatically adjust the amount of flowing water from the slit within the allowable minimum, thereby maintaining the maximum amount of water that passes through the membrane body, and achieving optimum pollution control efficiency. Can be raised.
In addition, when the flow velocity changes and the upstream pressure decreases, the curtain belts are deformed in a direction to reduce the slits that are temporarily widened by their own restoring force, and the flow of water flows. The action of minimizing the possibility is automatically performed.
[0010]
Alternatively, as described in claim 2, as a tensioning mode of the pollution control membrane device standing in the water, a part or all of the float is exposed in the air above the water surface, and the whole of the membrane body is in water and its lower end. The float buoyancy may be adjusted from the outside so that it can be suspended from the bottom holding belt and the bottom of the water.
[0011]
When the pollution prevention membrane device is configured in this way, the extension position on the depth of the pollution prevention membrane device standing in water can be freely moved in the vertical direction. Corresponding to the distribution, the position on the depth of the film body can be moved at any time, and the effect of pollution control can be exhibited to the highest degree.
[0012]
Furthermore, as shown in claim 3, as a tensioning aspect of the anti-pollution membrane device standing in water, the lower restraining belt of the membrane body is in contact with the bottom of the water in its entire length, and the upper surface of the float does not reach the water surface. In addition, the buoyancy of the float may be adjusted from the outside so that a gap may be formed between the surface and the water surface.
[0013]
If the pollution prevention film device is configured in this way, the extension position on the depth of the pollution prevention film device standing in water can be freely moved in the vertical direction. Corresponding to the distribution of pollution on the depth, the position of the film body on the depth can be moved at any time, and the effect of pollution control can be exhibited to the maximum extent.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a pollution control film device according to the present invention will be described in detail with reference to the drawings. In FIG. 1, the suspension-type antifouling film A <b> 1 includes a float 21 and a film body 22 attached along the lower surface in the longitudinal direction of the float 21. The film body 22 includes a belt-like upper restraining belt 26 and a lower restraining belt 27 each having a horizontally long belt, and a plurality of curtain belts 28 arranged in close contact with each other with no gap therebetween. The upper end of the belt is attached to the upper restraining belt 26 and the lower end thereof is attached to the lower restraining belt 27, whereby a slit type film body composed of a number of curtain belts 28 extending in parallel is formed. For the curtain belt 28, for example, a belt-like polyester material is selected, and the water permeability by the cloth is used, and at the same time, a certain degree of stretchability and resilience provided by a normal cloth-like material is effectively utilized. When the film body 22 having such a configuration is attached to the lower surface of the float 21 and stretched in running water, the curtain belts 28 adjacent to each other according to the pressure of running water have upper and lower upper and lower holding belts 26 and 26, respectively. 27, the unconstrained portion between them is opened to the left and right by excessive water pressure while resisting its own restoring force, so that the running water is released from the slit 30 generated between them and the pressure of the running water is increased. It is configured to be digested. The curtain belt 28 is provided with an intermediate weight 29 in the longitudinal direction for weighting the curtain belt 28.
[0015]
Next, the mode of operation of the pollution control film apparatus having the configuration of FIG. 1 will be described in detail with reference to the drawings. First, in FIG. 1, when the water flow is very small, water can be passed from the upstream side to the downstream side with the membrane body 22 being suspended due to the permeability of the material of the curtain belt 28. The film body 22 hardly bends in the downstream direction, and therefore the adjacent curtain belts 28 do not form the slits 30 between them, and the running water determined by the size of the fabric of the curtain belts 28 is determined. Within the range of speed, a highly accurate antifouling action can be performed.
[0016]
Next, FIG. 2 shows a state where the flow velocity is slightly increased and the film body 22 is gently pushed toward the downstream side. In this state, the curtain belt 28 tries to maintain a state in which the curtain belt 28 is in contact with each other as much as possible to prevent the slit 30 from being formed, but only when it is unavoidable, the minimum slit 30 is opened and the running water is discharged from there. By allowing the bypass, an automatic adjustment action is performed so that the water pressure on the upstream side of the membrane body 22 does not rise excessively and lift the membrane body 22 in the horizontal direction.
[0017]
In FIG. 3, the flow velocity is further increased so that the flow of water cannot be completely digested by the size of the fabric of the curtain belt 28, all the curtain belts 28 open the slits 30, and the water passes through the slits 30. It will be in the state which flows away to the downstream side freely from. Even in this state, if the flow velocity changes and the upstream pressure decreases, each curtain belt 28 reduces the slit 30 that has been temporarily widened by its own restoring force. Deforms in the direction and automatically acts to minimize the flow of water. FIG. 4 shows this mode of operation, and even when the flow velocity is increased as described above, the upstream pressure increase caused by the flow velocity increase is caused by the unconstrained portion of the curtain belt 28 being opened left and right. Since the flowing water is allowed to escape from the slit 30 generated during that time, the pressure of the flowing water is digested, so that the pressure on the upstream side disappears at an early stage, and the film body 22 is horizontally moved by the pressure as in the conventional case. As a result, it is prevented that the water flow is pushed up or the water flow pushes up the film body 22 in a direction close to the horizontal state, so that the water is dived under the film body 22 and bypassed. The result of this action is shown in FIG. 4, and the effect is well understood by comparing this figure with FIG. That is, in FIG. 4, it is clear that the generation of the slit 30 prevents the curtain belt 28 from being pushed in the horizontal direction.
[0018]
Further, according to FIG. 4, the water flow indicated by a large number of arrows all advances toward the curtain belt 28, passes through the slit 30 generated in the curtain belt 28, and flows downstream, so that the posture of the film body 22 6 does not flow in the horizontal direction as shown in FIG. 6 and maintains a direction close to the vertical direction. As a result, the water flow of the P arrow that dives through the lower end of the film body 22 to the downstream side is also compared with that in FIG. There are few. As for the factors that cause such an action, the fact that the intermediate weight 29 is provided in the middle of the curtain belt 28 is also very effective.
[0019]
As described above, according to the configuration of FIG. 1, it is possible to automatically adjust the amount of flowing water that passes through the membrane body in response to fluctuations in the flow velocity, and as a result, always maintain the highest pollution control efficiency. In addition, the installation position of the anti-pollution membrane device standing in the water, that is, the installation height can be freely changed, and the pollution control effect can be achieved at any depth while using a single membrane body. Can be demonstrated to the highest degree.
[0020]
As a configuration example for enabling adjustment of float buoyancy from the outside as in claim 2 or claim 3, for example, the float volume can be changed according to the amount of gas filled. It can be easily implemented by a method such as remotely controlling the gas supply amount to the float.
[0021]
【The invention's effect】
Since the pollution control film device according to the present invention is configured as described above, the following effects are obtained.
[0022]
1) In claim 1, it is possible to automatically adjust the amount of flowing water that passes through the membrane body in response to fluctuations in the flow velocity, and as a result, it is possible to always maintain the highest pollution control efficiency.
[0023]
2) In claim 2, the installation position in the depth of the anti-pollution membrane device standing in water, that is, the installation height can be freely changed, and a wide range of depth can be accommodated while using a single membrane body. In particular, the effect of pollution control can be exhibited to the maximum degree with respect to the water depth in the upper layer portion of the entire depth region.
[0024]
3) In claim 3, the extension position of the anti-pollution membrane device standing in water, that is, the installation height can be freely changed, and a wide range of depth can be accommodated while using a single membrane body. Especially, the effect of the pollution control can be exhibited to the highest degree with respect to the water depth in the lower layer portion of the entire depth region.
[Brief description of the drawings]
FIG. 1 is a front view of a pollution control membrane device of the present invention installed in water.
FIG. 2 is an explanatory view showing an operation mode of the apparatus of FIG. 1;
FIG. 3 is an explanatory view showing a different operation mode of the apparatus of FIG. 1;
4 is a side view showing different operating states of the apparatus of FIG. 1. FIG.
FIG. 5 is a perspective view showing respective usage states of a suspension type pollution prevention film A and a submerged pollution prevention film B of a conventional apparatus.
FIG. 6 is a side view showing an operating state of a conventional device.
[Explanation of symbols]
21 Float 22 Film body 26 Upper restraining belt 27 Lower restraining belt 28 Curtain belt 29 Intermediate weight 30 Slit A Suspension type pollution prevention film B Submerged pollution prevention film

Claims (3)

An anti-pollution membrane device that is stretched in a direction intersecting with running water and is set up in the water to prevent the contamination of water passing therethrough, the float and the membrane attached along the longitudinal lower surface of the float The film body is formed by arranging a plurality of curtain belts between the upper and lower restraining belts, and a plurality of curtain belts between the upper and lower restraining belts. Closely aligned with the state, the curtain belt is composed of chemical fiber products that are permeable to water, the upper end of each curtain belt is attached to the upper restraining belt, and the lower end is attached to the lower restraining belt, When configured as a slit-type membrane consisting of a large number of curtain belts stretched in parallel, when the membrane is attached to the lower surface of the float and stretched in running water, excessive pressure of running water Depending on the situation, the adjacent curtain belts are attached to the upper and lower restraining belts with the upper and lower ends being respectively attached, and the unconstrained portion between them opens to the left and right, thereby allowing the running water to escape from the slits created between them. If the excessive pressure is digested and the flow velocity changes and the upstream pressure decreases, the curtain belts contract the temporarily expanded slits by their own restoring force. An anti-contamination membrane device characterized in that it is configured to deform in the direction, and an intermediate weight for weighting the belt is provided in the middle of the curtain belt. As an extension mode of the pollution prevention membrane device standing in the water, part or all of the float is exposed in the air above the water surface, and the entire membrane body is in water, and the lower holding belt at the lower end and the bottom of the water The pollution control film device according to claim 1, wherein the float buoyancy can be adjusted from the outside so that it can be suspended in the air with a gap between them. As an extension mode of the pollution prevention membrane device standing in the water, the lower restraining belt of the membrane body is in contact with the bottom of the water in the water, and the upper surface of the float does not reach the water surface and there is a gap between the water surface The antifouling film device according to claim 1, wherein the float buoyancy can be adjusted from the outside.

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