JP2002038454A - Flexible membrane weir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible membrane weir capable of at least temporarily erecting the weir even when an unexpected situation in which the flexible membrane weir gets to fall arises and exhibiting the minimum function as a weir to greatly improve the reliability. SOLUTION: The flexible membrane weir is erected by supply of a fluid and falls in compliance with discharge of the fluid and constituted of a first bag body in which a fluid can be sealed and a second bag body in which a fluid can be sealed irrespective of the first bag body. A weir is constituted by the first bag body and the second bag body in respectively independently erected state. The fluid is usually supplied in only the first bag body and it is supplied into the second bag body only when the first bag body is abnormal. The function of the flexible weir is not impaired even if an abnormal trouble arises in the first bag body. 1 flexible membrane weir, 2 first bag body, 3 second bag body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible membrane weir that does not impair its function as a weir even if an abnormality occurs in a part of the flexible membrane weir.

[0002]

2. Description of the Related Art Heretofore, flexible membrane dams have been widely used in which air is supplied into a flexible membrane so as to be raised and exhausted to make the flexible membrane fall down. In such a flexible membrane weir, a flexible membrane having a weir height corresponding to a use condition is prepared in advance and installed on the ground such as a river to constitute an up-and-down weir. The internal pressure may drop abnormally due to breakage due to the like or the life of the flexible membrane itself, and the flexible membrane weir may reach an unintended falling state.

[0003] In this case, a large amount of water flows upstream of the flexible membrane weir, which not only impairs the function of the weir, but also causes a situation in which a sudden outflow of water causes some damage to the downstream side. You. For this reason, the flexible film has a dual structure to improve reliability.

As a conventional flexible membrane weir employing such a double structure, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. H11-303049. As shown in FIG. 3, this flexible membrane weir has a double structure of a non-airtight outer layer rubber 5 and an airtight inner tube 6 wrapped in the outer layer rubber and expanded and contracted by supply and exhaust of a fluid. With the double structure, the inner tube 6 is prevented from being damaged by an impact generated by a boulder or the like at the time of full fall.

The flexible membrane weir disclosed in US Pat. No. 4,299,514 has a partition 7 provided inside the flexible membrane weir to separate and separate the upper and lower sides as shown in FIG. The fluid is supplied to each of the upper section 8 and the lower section 9 to stand up.

[0006]

However, in the conventional example 1 shown in FIG. 3, only the inner tube 6 can be filled with a fluid, and the fluid is supplied to the inner tube 6 so as to rise up. The outer layer rubber 5 only prevents the inner tube 6 from being damaged by an impact generated by a boulder or the like at the time of full fall. Therefore, when the internal pressure of the inner tube 6 decreases due to the life of the inner tube 6 or the like and the flexible membrane weir unintentionally falls down, there is no longer any remedy.

In the prior art 2 shown in FIG. 4, the fluid is always supplied to both the upper section 8 and the lower section 9 when the flexible membrane dam is erected. The parcels need to be maintained. In addition, since fluid supply and discharge are performed in exactly the same manner in both compartments, if one of the compartments causes a decrease in internal pressure due to the service life, etc., the other compartment may be in the same service life condition. If the flexible membrane weir has reached an unintentional falling state, it can no longer be remedied.

Accordingly, the present invention enables at least an emergency weir to stand up even if the flexible membrane weir unintentionally falls down, and exhibits the minimum function as a weir. It is an object of the present invention to provide a flexible membrane weir that can significantly improve reliability.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to provide a flexible membrane capable of standing up by supplying a fluid and falling down by discharging. A weir comprising a first bag capable of sealing a fluid and a second bag capable of sealing a fluid independently of the first bag, wherein the first bag and the second bag are each independently The weir is constructed in an upright state.
The fluid is supplied only to the bag, and the fluid is supplied to the second bag only when the first bag is abnormal.
The present invention relates to a flexible membrane weir that does not impair its function as a weir even when an abnormality is present in the bag.

[0010] For example, the second bag is provided inside the first bag, and preferably, the outer peripheral length of the second bag is shorter than the inner peripheral length of the first bag. It relates to a flexible membrane weir. Further, as another example, one of the bags is partitioned by a partition so that one is a first bag and the other is a second bag. Preferably, the fluid in the first bag is discharged and the second bag is discharged. In the state where fluid is supplied to the
The present invention relates to a flexible membrane weir in which at least a tensile force does not act on the bag side.

[0011] Preferably, in a state where the fluid in the first bag is discharged and the fluid is supplied to the second bag, only the first bag can be replaced with a flexible membrane dam. It is related. Further, the first bag body is provided with abnormality detecting means,
It is preferable that the abnormality of the bag can be automatically detected,
It is preferable that the abnormality detecting means detects the pressure in the first bag.

Further, a flexible membrane weir provided with a control device for detecting an abnormal pressure drop of the first bag body, automatically supplying fluid into the second bag body, and immediately maintaining the function as a weir. It is preferable that

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A flexible membrane weir of the present invention comprises a first bag capable of sealing a fluid and a second bag capable of sealing a fluid independently of the first bag. And, unlike the conventional flexible membrane weir having a double structure, fluid is supplied only to the first bag body in normal times, and the first bag body stands alone to constitute a weir.

Therefore, there is a possibility that the first bag which is always used may be damaged by a collision of a drifting object or the like. In addition, even if there is no external damage, deterioration occurs due to repeated stress or ultraviolet rays due to use, and the life is extended. The internal pressure is abnormally reduced, and the first bag body falls down as it is.

However, the second bag of the present invention is not used at all in normal times, and the supply and discharge of fluid to and from the second bag are not performed. Therefore, stress is not repeatedly applied to the second bag, and deterioration hardly progresses. Therefore, if fluid is supplied to the second bag body when the first bag body is abnormal, the second bag body constitutes a weir in an upright state alone, without impairing the function as a weir. The use of the flexible membrane weir can be continued.

Here, the second bag is preferably provided inside the first bag. That is, it is an independent double bag. This is because if the second bag is inside the first bag, the second bag is not exposed to the environment, so that ultraviolet deterioration or the like does not progress. In addition, when the fluid is supplied to the second bag to be in the upright state, the first bag outside of the second bag is also in the upright state. Therefore, it is apparent that fluid is supplied to the first bag to constitute a weir. Above can be exactly the same.

When the second bag is provided inside the first bag, it is preferable that the outer peripheral length of the second bag is shorter than the inner peripheral length of the first bag. With this configuration, since no tensile force acts on the first bag when the second bag is raised, even if the first bag has a crack, the crack does not progress. It is.

Further, by dividing the inside of one bag with a partition, one can be a first bag and the other can be a second bag. In this case, the partition wall is commonly used for the first bag body and the second bag body. However, since there is no breakage due to collision of a drifting substance or the like and no deterioration of ultraviolet rays, it is extremely unlikely that an abnormality occurs in the partition wall at first. . Therefore, if fluid is supplied to the second bag when the first bag is abnormal, the function as a weir does not suffer.

In the case where the inside of one bag is partitioned by the partition, the fluid in the first bag is discharged and the fluid is supplied into the second bag, and at least the first bag except the partition is pulled toward the first bag. Preferably, no force is applied. This is because when the first bag other than the partition wall has a crack, the crack does not proceed.

Incidentally, the second bag may have the same strength and life as the first bag, but may be an emergency one. In other words, if it is a simple one that can maintain the function as a weir for a short period of time until a new first bag arrives, economic efficiency can be improved.

[0021] If the fluid in the first bag is discharged and the fluid is supplied to the second bag and only the first bag can be replaced, the flexible function can be achieved without impairing the function as a weir. The life of the permeable membrane weir can be greatly extended. That is,
Even when the second bag is standing up, the first bag is slackened so that no tensile force acts, and the first bag can be easily removed.

Here, the first bag and the second bag are:
Any material capable of enclosing a fluid such as a gas and capable of withstanding the fluid force of a river or the like may be used.For example, a non-adhesive layer is provided inside a plate-like rubber reinforced with polyester fibers or nylon fibers, and the air chamber is formed. Such a configuration can be used. In particular, when the second bag is provided inside the first bag, the second bag may be used.
The bag may be a simple rubber tube.

The abnormality of the first bag can be detected by visual inspection, but the first bag is provided with abnormality detecting means such as a pressure gauge for detecting the internal pressure and a monitoring device for the height of the weir. Preferably. That is, when the abnormality detecting means operates, the fluid supply device such as the compressor is automatically operated, and the fluid is supplied to the second bag instead of the first bag, so that the first bag completely falls. The second bag body is erected beforehand to avoid an unintended falling state.
After the abnormality of the first bag is eliminated by exchanging the first bag or the like, the fluid is supplied to the first bag while the fluid in the second bag is discharged to return to the normal state.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a flexible membrane weir of the present invention.
FIG. 1A is a cross-sectional view showing the flexible membrane dam 1 in a normal use state, and FIG. 1B is a cross-sectional view showing an emergency measure. That is, the flexible membrane weir 1 of the first embodiment is
A non-adhesive layer is provided inside a plate-like rubber reinforced with polyester fiber to form a first bag 2, and a second bag 3 of a rubber tube is provided inside the non-adhesive layer.

In the normal state shown in FIG. 1A, the fluid is supplied only from the fluid supply device (not shown) to the first bag 2 via the air supply valve, and the first bag 2 is used alone. It stands up and constitutes a weir. On the other hand, no fluid is supplied to the second bag 3 and the second bag 3 is lying inside the first bag 2.

Next, when an abnormality occurs in the first bag 2 and an abnormal decrease in the internal pressure of the first bag 2 is detected by abnormality detecting means (not shown), the connection to the second bag 3 is made. The supplied air supply valve (not shown) is automatically opened to supply the fluid into the second bag 3. Therefore, as shown in FIG. 1 (B), even if all the fluid inside the first bag 2 is discharged, the second bag 3 is in an upright state, and the function as a weir is maintained.

In the first embodiment, the outer peripheral length of the second bag 3 is shorter than the inner peripheral length of the first bag 2.
Therefore, since the first bag 2 has a slack in the emergency state shown in FIG. 1B, the crack of the first bag 2 does not progress. Moreover, since only the first bag 2 can be easily replaced in this state, it is possible to easily eliminate the abnormality of the first bag 2 while maintaining the function as a weir. Then, fluid is supplied to the replaced new first bag 2 and the second bag 3
When the fluid is discharged, it returns to the normal state shown in FIG.

The upright state of the second bag body 3 in the first embodiment is an emergency operation until the new first bag body 2 arrives and is replaced. Therefore, taking into consideration the ease of replacement, etc. The weir height is 90% of normal.

FIG. 2 is a sectional view showing Embodiment 2 of the flexible membrane weir of the present invention. In the flexible membrane weir 1 of Example 2, a partition 4 is provided inside a plate-like rubber reinforced with polyester fiber, one side of the partition 4 is a non-adhesive layer, one is a first bag body 2 and the other is a first bag. It is a two-bag body 3. In addition, two plate-like rubbers having a non-adhesive layer inside may be prepared, and one lower surface and the other upper surface may be combined to form the partition wall 4.

The normal state in the second embodiment is as shown in FIG. 2A, and when an abnormality occurs in the first bag 2, it is as shown in FIG. 2B. The second embodiment also has substantially the same operation and effect as the first embodiment.

[0031]

The flexible membrane weir of the present invention comprises a first bag and a second bag, each of which is capable of independently enclosing a fluid. In normal times, the fluid is supplied only to the first bag. Since a weir is formed and fluid is supplied to the second bag only when the first bag is abnormal, the weir is formed. Therefore, even if an abnormality occurs in the first bag, a minimum function as a weir is provided. Can be exhibited, and the reliability of the flexible membrane weir can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing Embodiment 1 of a flexible membrane weir of the present invention.

FIG. 2 is a sectional view showing Embodiment 2 of a flexible membrane weir of the present invention.

FIG. 3 is a cross-sectional view showing a first conventional example of a flexible membrane weir.

FIG. 4 is a cross-sectional view showing a second conventional example of the flexible membrane weir.

[Explanation of symbols]

 1 Flexible membrane dam 2 First bag 3 Second bag 4 Partition 5 Non-airtight outer layer rubber 6 Airtight inner tube 7 Partition 8 Upper section 9 Lower section

Claims (9)

[Claims] 1. A flexible membrane weir which rises by supplying a fluid and is capable of falling down by discharging, a first bag body capable of sealing a fluid, and a fluid sealed independently of the first bag body. A second bag body, the first bag body and the second bag body are each configured to form a weir in an upright state independently, and fluid is supplied only to the first bag body in normal times, The first
A flexible membrane weir in which fluid is supplied to the second bag only when the bag is abnormal, so that the function as a weir is not impaired even if an abnormality exists in the first bag. 2. The flexible membrane weir according to claim 1, wherein a second bag is provided inside the first bag. 3. The flexible membrane dam according to claim 2, wherein the outer peripheral length of the second bag is shorter than the inner peripheral length of the first bag. 4. The flexible membrane dam according to claim 1, wherein one of the bags is partitioned by a partition so that one is a first bag and the other is a second bag. 5. The apparatus according to claim 4, wherein at least a tensile force does not act on the side of the first bag except for the partition wall in a state where the fluid in the first bag is discharged and the fluid is supplied into the second bag.
4. The flexible membrane weir according to item 1. 6. The device according to claim 3, wherein only the first bag is exchangeable in a state where the fluid in the first bag is discharged and the fluid is supplied to the second bag. Flexible membrane weir. 7. The flexible membrane weir according to claim 1, wherein the first bag is provided with an abnormality detecting means. 8. The flexible membrane weir according to claim 7, wherein the abnormality detecting means of the first bag detects a pressure in the first bag. 9. The control device according to claim 1, further comprising a control device for detecting an abnormal pressure drop of the first bag, automatically supplying a fluid to the second bag, and immediately maintaining the function as a weir. A flexible membrane weir according to any one of the preceding claims.