JP3111198B2 - Inundation prevention device for submerged water level - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a junction box of a pressure type water gauge installed on a riverbed or the like for river management or the like, which needs to be opened to the atmosphere, and can be appropriately operated on site by an administrator. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water immersion prevention device for a water immersion level, such as an operation panel, which prevents water immersion even if the water level rises in a river or the like.

[0002]

2. Description of the Related Art In order to monitor and manage the water level of a river or the like, a pressure type water level gauge, an operation panel for operating a pump and a valve at the site, etc. are installed at an appropriate point such as a riverbed. I have. The relay box and operation panel of these pressure type water level gauges are housed in a box body so as not to be exposed to rainwater. However, the junction box of the pressure type water level gauge needs to be open to the atmosphere in order to obtain a desired measurement accuracy. In addition, in an operation panel or the like, an opening for inserting a hand for operation into a box body that covers the outside must be provided.

[0003]

By the way, in the case of a river or the like, if the water level rises abnormally due to a large amount of rainwater due to a typhoon or the like, a box for storing a relay box or an operation panel of a pressure type water level gauge. The body may be submerged. Therefore, in a normal state, the box body whose inside is open to the atmosphere must have a waterproof structure in a submerged state, and its structure becomes complicated,
There is a problem that the size and weight are increased and the equipment cost is increased accordingly. In the operation panel, etc.,
It must be at a height that can be easily operated by an administrator, and installing it at a high position that does not submerge not only causes poor operability but also increases the equipment cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure, which is capable of preventing inundation of a water-inhibiting device even if it is submerged. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an apparatus for preventing water from being submerged in a submerged water level according to the present invention is a box body having an opening at the bottom or a side near the bottom, which needs to be open to the atmosphere. A float that rises with the rise of the water level of a river or the like, and a telescopic room member that shrinks in conjunction with the rise of the float and has airtightness are provided. Is communicated with the inside of the box body, and the air in the box body is pressurized in accordance with the rise in the water level of a river or the like to suppress the rise in the water level in the box body.

A box having an opening at a bottom portion or a side surface near the bottom covers an outside of a water-inhibiting device that needs to be open to the atmosphere, and a box in which the water-inhibiting device in the box does not flood. The volume above the maximum non-water inundation level in the body is V1, the volume below the maximum water level in the box above the opening in the box is V2, and the volume of a river or the like that prevents flooding from the opening is defined as V2. The water depth up to the highest water level is H
If m, the box may be configured such that V2 / V1 ≧ H / 10.

The horizontal cross-sectional area inside the box is
It can also be configured so that it becomes narrower upward.

Further, the float and the telescopic chamber member may be connected by a lever-like link.

Further, the expansion / contraction chamber member may be directly connected to the box body.

Further, the float receives buoyancy from the water level of a river or the like whose water level in the box rises to the maximum water level of the non-inundation in the box in which the water-inhibiting device does not flood, or the water level of a river slightly lower than that. It is also possible to configure so that the contraction of the telescopic chamber member is started by ascending.

Further, the upper part or the whole of the box may be formed in a frustum shape or a frustum shape.

[0012]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a structural view of a first embodiment of an apparatus for preventing inundation against a submerged water level according to the present invention.

FIG. 1 shows a first embodiment of the apparatus for preventing inundation against a submerged water level according to the present invention.
An operation panel 14, which is a device for preventing inundation, is provided through the control panel 2. The normal water level WL1 of the river is below the upper surface of the foundation 10, and the operation panel 14 is located at a height where there is no danger of flooding. Further, the operation panel 14 is covered with a box 16. The bottom or lower end of the box 16 is the foundation 1
It is fixed to 0. An opening 18 is provided on a side surface near the bottom of the box 16. The operation panel 14 can be operated by inserting a hand into the box 16 through the opening 18.

The upper end surface of the box body 16 is opened, and is capable of extending and contracting in the vertical direction, and has an airtight airtight chamber member 20.
Are arranged in communication. Therefore, the box 16 and the telescopic chamber member 20 allow only the opening 18 to open to the atmosphere.
One space is formed. A link 24 is pivotally provided at a fulcrum 22a by a fulcrum support arm 22 protruding from the outer side of the box body 16.
One end of 4 is connected to the upper end of the telescopic chamber member 20, and the other end is connected to the upper end of the float 26. This float 26 rises the water level of the river, submerges the opening 18,
Further, the water level rises and the air in the box 16 is compressed by the water pressure so that the water level in the box 16 becomes the non-inundation maximum water level WL2 in the box in which the operation panel 14 is not flooded, or the water level WL3 of the river or a slightly lower water level. It is arranged to start rising by receiving buoyancy. The normal water level WL1 of the river
, The elastic member 2
Numeral 0 is a state in which it is lifted in the state of maximum extension, and its internal volume is the maximum.

Then, the water level of the river further rises from WL3 to reach the predicted maximum water level of the river and the operation panel 14
The float 26 rises as the water level rises to the maximum submerged water level WL4 at which the water can be prevented from being immersed, whereby the telescopic chamber member 20 is contracted via the link 24. Due to this contraction, the air in the box 16 is pressurized, and against the increase in water pressure due to the increase in water depth accompanying the rise in the water level of the river, the box 16
Is prevented from rising above the non-inundation maximum water level WL2 in the box. Then, when the water level of the river falls and the float 26 descends, the telescopic chamber member 20 is again in an extended state.

In such a configuration, the normal water level WL1
In the state (1), the operation panel 14 is opened to the atmosphere through the opening 18, and if necessary, the administrator inserts a hand into the box 16 through the opening 18 to perform an appropriate operation of the operation panel 14. . Then, even if the water level of the river rises to the submerged maximum water level WL4, the rise in the water level in the box 16 is suppressed to the non-inundated maximum water level WL2 in the box. Therefore, the opening 1
Even when submerged at a water depth H from 8 to the maximum submerged water level WL4, the operation panel 14 in the box 16 can be prevented from being submerged.

Since the rise of the float 26 and the contraction of the expansion / contraction chamber member 20 are connected via the lever-like link 24, the respective arm lengths from the fulcrum 22a are set at an appropriate ratio, thereby raising the float 26. For height and buoyancy,
The contraction height ratio of the expansion / contraction chamber member 20 can be set to an appropriate relationship. Here, the buoyancy of the float 26 is
Of course is large enough to shrink. The rising movement of the float 26 causes the water level in the box 16 to rise above the non-inundation maximum water level WL2 in the box.
L3 or slightly lower water level to submerged maximum water level WL
4 and the travel distance is the normal water level W of the river.
It is enough for large changes in river water level from L1. The structure of the float 26 is simpler as the moving distance of the float 26 is shorter. In addition, it is rare that the water level of the river reaches the highest water level WL4,
It is rare for the device 6 to move up and down, and the device is not damaged by wear or the like.

Further, by directly communicating the telescopic chamber member 20 with the box 16, the compression ratio of the air in the box 16 and the telescopic chamber member 20 is reduced when the telescopic chamber member 20 is contracted. It is possible to increase the pressure, and the pressure of the air becomes higher accordingly, and it is possible to suppress the rise in the water level in the box 16.

Next, a second embodiment of the present invention will be described with reference to FIG. FIGS. 2A and 2B are structural diagrams of a second embodiment of the apparatus for preventing inundation against a submerged water level according to the present invention, wherein FIG. 2A shows a state of normal water level, and FIG. 2B shows a state of maximum water level.
2, the same or equivalent members as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 2, an operation panel 14 is provided on a foundation 10 via a pole 12. Operation panel 1
4 is covered by a box 36. An opening 18 is provided on a side surface near the bottom of the box 36, and the upper portion is closed in a truncated cone shape as an example. In addition, Basic 1
0 is provided with a guide 38 for guiding the float 26 so as to be movable up and down. The lower end of the telescopic chamber member 40 is fixed to the float 26,
Is fixed to the upper end of the guide 38 or the like as appropriate. Moreover, the upper end in the telescopic chamber member 40 communicates with the upper end in the box 36 via the connecting pipe 42.

In this configuration, as the water level of the river rises, the float 26 is guided by the guide 38 and rises, so that the expansion / contraction chamber member 40 is contracted and the air in the box 36 is pressurized. When the water level of the river reaches the submerged maximum water level WL4,
The pressure of the air in the box 36 received from this water level is balanced so that the operation panel 14 is not flooded at the non-inundation maximum water level WL2 in the box body or lower. Accordingly, the operation panel 14 in the box 36 is prevented from being flooded with respect to the water depth H from the opening 18 to the submerged maximum water level WL4.

In the second embodiment shown in FIG.
6, the upper portion of the box 36 is made to have a truncated cone shape, and the inner volume of the upper portion of the box 36 is made smaller than the inner volume of the lower portion. Accordingly, the rise in the water level in the box 36 can be suppressed to a small extent with respect to the rise in the water level of the river.

Further, a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a structural view of a third embodiment of the apparatus for preventing inundation against a submerged water level according to the present invention. 3, the same or equivalent members as those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 3, a control panel 14 is provided on a foundation 10 via a pole 12. Operation panel 1
4 is covered by a box 46. An opening 48 is provided at the bottom of the box 46, and the foundation 1 faces the opening 48.
0 is also provided with a concave portion 10a. The operation panel 14 can be operated by inserting a hand into the box 46 through the recess 10a and the opening 48. The entire box 46 is formed in, for example, a truncated cone shape. Here, the volume above the non-inundation maximum water level WL2 in the box 46 where the operation panel 14 is not flooded in the box 46 is V1, and the volume above the opening 48 in the box 46 and below the non-inundation maximum water level WL2 in the box. Assuming that the volume is V2 and the water depth from the opening 48 to the maximum water submergence level WL4 of the river for preventing inundation is Hm, V2 / V1 ≧ H / 10. If this relational expression is satisfied, the air of the total volume V1 + V2 in the box body 46 will have a compressed volume of V1 or more when compressed by the water pressure of the water depth Hm, and the water level of the river will be submerged. Even when the water level reaches the maximum water level WL4, the water level in the box body 46 becomes equal to or lower than the non-inundation maximum water level WL2 in the box body where the operation panel 14 is not flooded. This prevents the operation panel 14 from being flooded. The higher the submerged maximum water level WL4, the higher the water pressure, the higher the non-inundated maximum water level WL2 in the box, and the smaller the volume V1 with respect to the entire volume of the box 46. Therefore, as the submerged maximum water level WL4 of the river is set higher, the overall volume of the box 46 must be increased.

In this configuration, there are no movable parts such as the floats 26 of the first and second embodiments, and the structure is extremely simple. Here, by making the horizontal cross-sectional area of the inside narrower as the upper part of the box 46 is shaped like a truncated cone, the rising rate of the water level in the box 46 with respect to the increase of the water depth becomes higher as the water level in the box 46 becomes higher. Becomes smaller. So,
Compared to the case where the horizontal cross-sectional area of the upper and lower parts does not change,
The water level in the box 46 is kept low. Then, the box 46
The inside water level can be restricted to a height at which the operation panel 14 is not flooded.

In the first and second embodiments,
The shapes and dimensions of the float 26 and the expansion / contraction chamber members 20 and 40 may be appropriately set, and are not limited to the above structure. Further, the shapes of the boxes 16, 36, 46 are not limited to the above-described embodiment. And the inundation prohibition equipment,
The effect is not limited to the operation panel 14 but can be obtained by applying the water immersion prevention device to the water immersion level of the present invention if it is necessary to be open to the atmosphere and is not suitable for water immersion. Further, the shapes of the boxes 36 and 46 in the second and third embodiments may be any of truncated cones, truncated pyramids, cones and pyramids, and have a structure in which the inner volume decreases stepwise in the upper part. There may be. Further, the apparatus for preventing inundation against a submerged water level according to the present invention is not limited to use in rivers, but can of course be applied to monitoring of water levels in dams and lakes, monitoring of water levels in harbors, and the like.

[0027]

As described above, the water immersion prevention device for the water immersion level according to the present invention is constituted, so that the following special effects can be obtained.

In the apparatus for preventing inundation against a submerged water level according to the first aspect, as the water level of the river rises, the telescopic chamber member is contracted by the rising float to pressurize the air in the box body. The rise of the water level in the box body which is about to rise can be suppressed. Accordingly, it is possible to prevent the inundation prohibition device provided in the submerged box body from being flooded. Moreover, in a normal state, the inundation-prohibited device is open to the atmosphere.

Further, in the water immersion prevention device for the water immersion level according to the second aspect, it is possible to prevent the water immersion preventing device provided in the box body submerged by a very simple structure having no movable parts from being immersed.

In the apparatus for preventing inundation of a submerged water level according to the third aspect of the present invention, the change in the water level in the upper part of the box body with respect to the change in water depth can be reduced, and the change in the water level in the box body can be reduced accordingly. The rise in water level is suppressed. Therefore, it is sufficient that the height from the opening to the inundation prohibition device is small.

In the apparatus for preventing inundation against a submerged water level according to the fourth aspect, since the float and the telescopic chamber member are connected by a lever-like link, the arm length from the fulcrum of the link is appropriately set. Thus, the ratio of the contraction height of the expansion / contraction chamber member to the rising movement height and buoyancy of the float can be appropriately set. Further, it is possible to obtain a sufficient force for contracting the expansion / contraction chamber member by the buoyancy of the float.

Furthermore, in the apparatus for preventing inundation against a submerged water level according to claim 5, since the telescopic chamber member is directly communicated with the box body, the air in the box body is compressed by the contraction of the telescopic chamber member. The rate can be increased, and the rise in the water level in the box can be suppressed by the amount that the air pressure can be increased.

Furthermore, in the apparatus for preventing inundation against a submerged water level according to claim 6, when the water level in the river rises, the water level in the box rises and immediately before or slightly before the inundation prohibition device is flooded. As the float starts to rise,
The floating distance of the float is short and the structure is simple. Also, the water level of the river rarely rises until the float rises, and damage due to wear or the like does not occur.

Further, in the apparatus for preventing inundation against a submerged water level according to claim 7, the upper portion or the entirety of the box is formed in a frustum shape or a cone shape. The rise rate of the water level with respect to the increase is reduced, and the rise of the water level in the box body is suppressed.

[Brief description of the drawings]

FIG. 1 is a first view of a flood prevention device for a submerged water level according to the present invention.
It is a structural diagram of an Example.

FIG. 2 is a second view of a water immersion prevention device for a submerged water level according to the present invention;
It is a structural diagram of an Example, (a) shows the state of the normal water level, (b) shows the state of the submerged maximum water level.

FIG. 3 is a view showing a third example of the apparatus for preventing inundation against a submerged water level according to the present invention;
It is a structural diagram of an Example.

[Description of Signs] 14 Operation Panel 16, 36, 46 Box 18, 48 Opening 20, 40 Telescopic Room Member 24 Link 26 Float

Continuation of the front page (72) Inventor Masanobu Kunigami 2-191-1, Kitahashi-cho, Kita-Katsushika-gun, Kita-Katsushika-gun, Saitama Pref. Ministry of Construction Kanto Regional Construction Bureau Tonegawa Upstream Construction Office (72) Inventor Michiaki Negishi 1-5-5 Omorikita, Ota-ku, Tokyo No. 1 Inside Dengyosha Machinery Works (72) Inventor Atsuyuki Kawahara 1-5-1, Omorikita, Ota-ku, Tokyo Inside Machinery Works Dengyosha Co., Ltd. (56) References JP-A-50-45193 (JP, A) Japanese Utility Model 52-76352 (JP, U) Japanese Patent Publication No. 6-84609 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02B 1/00 G05D 9/00

Claims (7)

(57) [Claims] 1. A float provided with an opening on a bottom portion or a side surface near the bottom portion, which covers the outside of an inundation prohibition device which needs to be open to the atmosphere, and which rises as the water level of a river or the like rises. A telescopic chamber member that contracts in conjunction with the rise of the float and has airtightness is provided, and the inside of the telescopic chamber member is communicated with the box body, and air in the box body is raised according to a rise in the water level of a river or the like. An apparatus for preventing flooding of a submerged water level, wherein the apparatus is configured to pressurize to suppress a rise in water level in the box body. 2. A box having an opening at the bottom or a side near the bottom, which covers the outside of an inundation-inhibiting device that needs to be open to the atmosphere, and in which the inundation-inhibiting device in the box does not inundate. The volume above the maximum non-water inundation level in the body is V1, the volume below the maximum water level in the box above the opening in the box is V2, and the volume of a river or the like that prevents flooding from the opening is defined as V2. The water intrusion prevention device for the submerged water level, wherein the box body is configured such that V2 / V1 ≧ H / 10, where Hm is the water depth up to the submerged maximum water level. 3. The submersion prevention device for a submerged water level according to claim 1 or 2, wherein the horizontal cross-sectional area inside the box body becomes narrower upward. . 4. The apparatus according to claim 1, wherein the float and the expansion / contraction chamber member are connected by a lever-like link. 5. The apparatus according to claim 1, wherein the telescopic chamber member is directly communicated with the box body. 6. The water inundation prevention device for a submerged water level according to claim 1, wherein the water level in the box body rises to the maximum water level in the box body in which the water intrusion prohibition device does not inundate, or a slightly lower river level. And the like, wherein the float is raised by receiving buoyancy from the water level and the contraction of the telescopic chamber member is started. 7. The apparatus according to claim 3, wherein an upper portion or the entirety of the box is formed in a frustum shape or a cone shape.