JPWO2018230023A1 - Lightning type water level indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric type water level display device in which the installation height of each water level display plate can be arbitrarily changed and which is subjected to flexible waterproof treatment with a structure as simple as possible. An electric water level display device includes a plurality of water level display plates 1-1, 1-2, 1-3, 1 installed while changing heights so as to correspond to respective water levels set in stages. -4, a control box 10 for controlling energization to the water level display board, and a relay box 5 interposed between the control box and the water level display board, and the electric wire electrically connected to the water level display board is the relay box. Independently covered by waterproof tubes 4-1, 4-2, 4-3, 4-4 for waterproof connection with the water level indicator plate, the waterproof tube is S-shaped or reverse at the end connected to the water level indicator plate. It is characterized by being curved in an S shape. [Selection diagram] Figure 2

Description

The present invention relates to a lightning-type water level display device that indicates the water level corresponding to the risk of flooding of rivers, and in particular, it is possible to change the installation height of the water level display plate according to changes in the situation, and to a water level display plate. The present invention relates to an electric water level display device in which electric wires used for electric power supply and signal transmission are subjected to flexible waterproofing treatment.

The water levels of rivers are classified according to the degree of risk associated with rising water levels. In order of increasing risk, "flood risk water level", "evacuation judgment water level", "flood caution water level", "water defense team standby water level" Has become. The "flooding risk water level" is the water level at which there is a risk of flooding the river or the water level at which evacuation should be started in order to evacuate safely, and the "evacuation judgment water level" is such as evacuation preparation information from municipalities. The water level is a standard for evacuation information to be announced. The "flooding caution water level" is the water level at which river flooding should be noted, and the "water defense standby water level" is for the water defense team to wait. It is the water level that serves as a guide. A water level indicator board corresponding to these water levels is installed in a river designated in advance. In recent years, a lightning type water level display board has been used to ensure visibility at night and in bad weather.

Conventionally, when waterproofing an electric wire that supplies electricity or a signal to a lightning-type water level indicator board, a plurality of water level indicator boards and fixed conduits are integrated to waterproof the whole body, and It did not infiltrate (see Patent Document 1). Note that the relationship between the water level of rivers and the degree of risk may change over time, including the revision of standards.If it becomes necessary to change the position of the water level display plate, the water level display plate and the conduit tube will change. Had been replaced with a new one.

JP, 2010-267526, A

When multiple water level indicator boards and fixed conduits are integrated, it is structurally difficult to change the position of the water level indicator board once installed. Since it needs to be rebuilt, there is a problem that the cost becomes high. In order to be able to freely change the position of each water level indicator board, the water level indicator board and the conduit may be separated so that the water level indicator board can be attached to the appropriate position of the conduit tube. it can. However, in a structure in which the mounting position can be changed, if the connection between the water level display plate and the conduit is made to be a waterproof structure, the structure becomes complicated and the cost becomes high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric water level display device in which the installation height of each water level display plate can be arbitrarily changed and a flexible waterproof treatment is applied with a simple structure as possible. ..

As a means for solving the above problems, the electric water level display device of the present invention is a plurality of electric water level display plates installed while changing the height so as to correspond to each water level set in stages, and A control box for controlling energization to the electric water level display board, and a relay box interposed between the control box and the electric water level display board, an electric wire electrically connected to the electric water level display board, Each of the relay boxes is independently covered by a waterproof tube for waterproof connection between the electric water level indicator and the waterproof tube, and the waterproof tube has an S shape or an inverted S shape at an end connected to the electric water level indicator. It is characterized by being curved. Note that electrical connection means connection in a state in which electricity can be supplied and signals can be transmitted. The waterproof connection means that the connection is such that rainwater and river water can be prevented from entering.

Furthermore, the electric water level display device of the present invention is characterized in that the waterproof tube is curved at an allowable bending radius of the material.

Further, the electric water level display device of the present invention further comprises a protective cover for housing a waterproof tube waterproofly connected to the electric water level display plate, and the protective cover interpolates a gap between adjacent electric water level display plates. An interpolation side plate and a cover plate that covers the waterproof tube, the interpolation side plate is a gauge that regulates the interval between adjacent electric water level indicator plates, and the side surface of the waterproof tube on the electric water level indicator plate side. The protective plate is for protecting the front surface of the waterproof tube and the side surface on the opposite side of the electric water level indicator plate.

Furthermore, the electric water level display device of the present invention includes a waterproof cable having a plug attached to one end and the other end electrically connected to the control box, and a receptacle attached to the relay box and electrically connectable to the plug. In the inside of the relay box, the electric wire for energizing the lightning type water level display plate and the receptacle are electrically connected.

Alternatively, in the electric water level display device of the present invention, the control box and the relay box are waterproofly connected by a waterproof tube, and an electric wire for energizing the electric water level display plate is electrically connected to the control box through the waterproof tube. It is characterized by being.

In the electric water level display device of the present invention, even if waterproofing is performed from the outside, the water vapor remaining inside the relay box and in the space continuous with the relay box may be condensed due to a decrease in temperature. As a countermeasure, a desiccant can be hermetically sealed inside the relay box.

As another measure, an access valve for ventilation is attached to the relay box, dry gas is filled from the access valve, and the pressure inside the relay box and the space continuous thereto is made equal to or higher than atmospheric pressure. Can also Alternatively, an insulating and hydrophobic liquid can be sealed from the access valve and filled in the relay box and the space continuous with the relay box. Furthermore, it is also possible to fill the insulating liquefied gas whose saturation pressure is equal to or higher than the atmospheric pressure at room temperature from the access valve in the liquefied state at least partially, and to fill the inside of the relay box and the space continuous with this.

According to the electric water level display device of the present invention, a flexible waterproof tube and a water level display board are waterproofly connected, and a relatively simple structure in which an electric wire is passed through the waterproof tube is adopted, and the waterproof tube is a water level display board. Since it has a curved shape at the connection end with a predetermined shape, while ensuring waterproofness, the curved portion is appropriately deformed due to the mutation of the water level display plate, thereby providing a flexible waterproof structure. Can be realized.

It is a front view which shows the structure of a water level display board. It is a front view which shows the structure of a lightning type water level display device. It is a front view which shows the curved part of a waterproof tube. It is a front view which shows the state which mounted the interpolation side board in the clearance gap of a water level display board. FIG. 5 is a front view showing a state in which a cover plate is further attached in the state of FIG. 4. It is a partially enlarged view of an interpolation side plate and a cover plate. It is a partial enlarged view showing an example of electric wire processing in a relay box. It is a partial enlarged view showing other examples of electric wire processing in a relay box. It is a partial enlarged view which shows an example of the dimension of the curved part of a waterproof tube. It is a schematic diagram which shows the 1st Example which prevents dew condensation of the space which leads in a water level indicator board. It is a schematic diagram which shows the 2nd Example which prevents dew condensation of the space which leads in a water level indicator board. It is a schematic diagram which shows the 3rd Example which prevents dew condensation of the space which leads in a water level indicator board. It is a schematic diagram which shows the 4th Example which prevents dew condensation of the space which leads in a water level indicator board.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8.

FIG. 1 shows an assembled state of the water level indicator board. The water level display plate 1 has a frame 1a that wraps around the lightning plate 1b and has a waterproof seal around the periphery. The lightning plate 1b is formed by, for example, a method of sandwiching an EL lighting plate with tempered glass. A collar for attaching to a wall surface is provided around the frame 1a, and holes are provided at several places through which fixing bolts pass (not shown). From the side surface of the frame 1a, an electric wire 3 for supplying electricity or a signal to the electric light board 1b is drawn out. In the initial state, the drawn-out portion of the electric wire 3 is not waterproofed, and therefore waterproofed by the following method. First, the electric wire 3 is passed through the airtight pipe joint 2, the pipe joint 2 is moved to the root of the electric wire 3, and screwed into the frame 1a in a sealed state. Next, the electric wire 3 is passed through the flexible waterproof tube 4, and the waterproof tube 4 is connected to the pipe joint 2 in a sealed state. As a result, the electric wire 3 comes out of the tip of the waterproof tube 4. For the pipe joint 3, a pipe joint of a type in which a nut having a tube passed through a union screw is tightened, or a one-touch connector that can be attached with a seal simply by inserting the tube can be used. Through the above steps, the waterproofed water level display plate 1 is completed.

FIG. 2 shows an example in which four water level display plates are vertically arranged. The lowermost water level display plate 1-1 is a water level display plate whose position is fixed with respect to a relay box described later, and the water level display plates 1-2, 1-3, 1-4 located above the water level display plate 1-1 are A variable water level indicator whose relative position to the relay box can be changed. Here, the state is shown in which the water level display plates 1-2, 1-3, 1-4 are lowered to the lower limit of the variable range. On the side surfaces of the water level indicator plates 1-1, 1-2, 1-3, 1-4, the pipe joints 2-1, 2-2, 2-3, 2-4 and the waterproof tubes 4-1 and 4- are respectively provided. 2, 4-3 and 4-4 are attached in advance. Each waterproof tube 4 is connected to the relay box 5 by an airtight pipe joint 6. A control box 10 serving as a power source and a signal source of the water level display plate is installed above the water level display plate 1. Receptacles 9 are attached to the relay box 5 and the control box 10, respectively. The two receptacles 9 are connected by a waterproof cable 7 which is a multi-core electric wire with plugs 8 attached at both ends.

The waterproof tube 4-1 connected to the side surface of the water level indicator plate 1-1 is pulled upward so as to draw a J-shape while being bent at a substantially right angle. The waterproof tubes 4-2, 4-3, 4-4 connected to the side surfaces of the water level display plates 1-2, 1-3, 1-4 are bent downward, and while being bent upward, the S-shaped ( Or, it is pulled up to draw an inverted S-shape. The lifting portions of the waterproof tubes 4-1, 4-2, 4-3, 4-4 are bundled in a linearly dense state.

FIG. 3 is a partially enlarged view of the uppermost water level display plate in the state of FIG. The waterproof tube 4-4 connected to the side surface of the water level display plate 1-4 once draws an arc having a radius R and curves downward, and then curves an arc having a radius R in the opposite direction. At this time, the outer surface of the curved portion of the tube is in contact with the extension surface of the side surface of the water level display plate 1-4. Thereafter, the waterproof tube 4-4 is pulled up after being bent at the same radius R. At the pull-up portion, the waterproof tubes 4-3, 4-2, 4-1 are arranged in order in a state of being in close contact with the waterproof tube 4-4. In this state, the width W from the side surface of the water level display plate 1-4 to the end surface of the waterproof tube 4-1 is twice the radius R of the curved arc and 5 times the outer diameter D of the tube. The required width W of the space surrounded by the mounting wall surface, the water level display plate 1, the interpolation side plate 11 and the cover plate 12 shown in FIG. 6 is thus determined. Since the flexible tube has an allowable minimum bending radius as a product, the required width W when the arc radius R is set to this minimum bending radius is the minimum value when the tube is used.

FIG. 4 shows an assembling stage of the electric water level indicator. In the electric water level indicator that informs the risk of flooding according to the river level, the distance between the water level indicators 1 must be changed according to the situation of each river. It is possible to measure the dimensions during assembly at the installation site to match the specified intervals, but mistakes are more likely to occur as human work increases. On the other hand, if the space between the water level display plates 1 is opened, the waterproof tube 4 may receive a load due to the water flow flowing into the gap, and may be damaged or foreign matter may enter. In order to prevent this, it is necessary to cover the side surface of the waterproof tube 4 in the gap portion of the water level display plate 1. Interpolation side plates 11 (11-1, 11-2, 11-3, 11-4) are provided as parts that also serve as a cover for the side space of the waterproof tube 4 and a gauge that determines the intervals between the water level display plates 1. There is. The interpolating side plate 11 is formed by bending the plate as shown in FIG. 6, and includes a base plate 11a attached to the wall surface, a side plate 11b covering the same surface as the side face of the water level display plate 1 and a front plate 11c attaching the cover plate 12. There is.

The interpolation side plates 11-1, 11-2, 11-3 correspond to predetermined intervals of the water level display plates 1-1, 1-2, 1-3, 1-4, and the bottom water level display plate 1 By alternately installing the other water level display plates 1-2, 1-3, 1-4 and the interpolation side plates 11-1, 11-2, 11-3 on the basis of -1, the water level display plate 1-1 is automatically installed. The intervals of 1-2, 1-3, 1-4 are set at predetermined positions. The uppermost interpolating side plate 11-4 serves as an upper protective plate of the waterproof tube. The waterproof tubes 4-2, 4-3, 4-4 are pulled upward depending on the positions of the water level display plates 1-2, 1-3, 1-4. Since the connection ends of these waterproof tubes 4-2, 4-3, 4-4 are curved in an inverted S shape, the positions of the water level display plates 1-2, 1-3, 1-4 are changed. At times, the inverted S shape is deformed into a vertically elongated state, and the radius R of the curved portion increases. Therefore, if the radius R of the bending portion is set to the allowable minimum bending radius of the product in advance with the water level display plates 1-2, 1-3, 1-4 placed at the bottom, it will be No smaller part occurs.

FIG. 5 shows a state in which the display board is completely assembled. A cover plate 12 for accommodating the waterproof tubes 4-1, 4-2, 4-3, 4-4 together is covered to complete the water level display plate. The cover plate 12 is formed by bending the plate as shown in FIG. 6, and is attached to the wall surface with respect to the base plate 12a and the waterproof tubes 4-1, 4-2, 4-3, and 4-4. It is composed of a side plate 12b that covers the side face on the opposite side and a front plate 12c that covers the front face and is attached to the interpolation side plate 11. A vertically long rectangular space surrounded by the mounting wall surface, the water level display plate 1, the interpolation side plate 11, and the cover plate 12 is formed, and this space protects the waterproof tube 4 from the outside and becomes a closed space that does not allow foreign matter to enter.

FIG. 7 shows a method of processing electric wires in the relay box. The relay box 5 is shown with the lid open. An airtight pipe joint 6 is attached to the lower surface of the relay box 5, and the waterproof tube 4 is connected thereto. The electric wire 3 extending from the waterproof tube 4 is drawn into the relay box 5. A waterproof receptacle 9 is attached to the upper surface of the relay box 5, and a plug 8 attached to a waterproof cable 7 is connected thereto. Lead wires 13 corresponding to the electric wires 3 are connected to the internal terminals of the receptacle 9. The lead wire 13 and the electric wire 3 are connected by a connector 14.

FIG. 8 shows another method for treating an electric wire. An airtight pipe joint 6 is attached to the lower surface of the relay box 5, and the waterproof tube 4 is connected to this. The electric wire 3 extending from the waterproof tube 4 is drawn into the relay box 5. An airtight pipe joint 16 is attached to the upper surface of the relay box 5, and a slightly thick waterproof tube 15 is connected thereto. The electric wires 3 of all the drawn water level indicators are put together into the waterproof tube 15, and further drawn into the control box 10 to which the upper part of the waterproof tube is connected.

In the processing method shown in FIG. 7, since the electric wire 3 may be extended to the inside of the relay box 5, the length of the electric wire connected to the water level indicator plate 1 can be shortened, and the work of passing the electric wire through the waterproof tube 4 and the arrangement of the electric wire can be performed. The work is simple, but on the other hand, the number of connection points of the electric wire is increased, so that poor contact is likely to occur. The processing method shown in FIG. 8 does not use different kinds of electric wires and does not have an intermediate connection of electric wires, so that the number of parts can be reduced and electrical risk such as contact failure is reduced, but workability is deteriorated. It may be appropriately selected depending on the installation location of the electronic water level display device, required performance, and the like.

An embodiment of the present invention will be described with reference to FIGS. 9 to 13.

FIG. 9 shows one example of the routing dimensions of the actual waterproof tube. Here, a product having an outer diameter of 6 mm and an allowable minimum bending radius of 20 mm is assumed as the waterproof tube. The water level display plate 1-4 shows a state in which the water level display plate is lowered to the lowest limit. The waterproof tube 4-4 connected to the pipe joint 2-4 attached to the side surface of the water level indicator plate 1-4 once draws an arc having a radius of 20 mm and bends downward, and then an arc having a radius of 20 mm goes upward. It is drawn and curved. At this time, the outer surface of the curved portion of the waterproof tube is in contact with the extension surface of the side surface of the water level display plate 1-4. At the pull-up portion where the waterproof tube is straightly upward, the other waterproof tubes 4-3, 4-2, and 4-1 are arranged in order in close contact with the waterproof tube 4-4. In this state, the width from the side surface of the water level indicator plate 1-4 to the end surface of the waterproof tube 4-1 is 70 mm, which is twice the arc radius of 20 mm of the curve and 5 times the outer diameter of 6 mm of the tube. This width becomes the minimum value of the required width of the space surrounded by the mounting wall surface, the water level display plate 1, the interpolation side plate 11 and the cover plate 12 shown in FIG.

The water vapor remaining inside the water level display plate 1 that has been subjected to the waterproofing process may cause dew condensation when the temperature drops, which may adversely affect the electronic circuit. The following describes some embodiments that prevent this.

FIG. 10 shows a first embodiment for preventing dew condensation in the space communicating with the water level display plate. After a desiccant 17 such as a silica gel pack is enclosed in the relay box 5, the relay box is sealed with an airtight lid. The water vapor remaining in the waterproof tube 3 leading to the relay box 5 or in the water level display plate 1 is absorbed by the desiccant, and the humidity inside these spaces decreases, so that even if the temperature decreases, dew condensation does not easily occur. ..

FIG. 11 shows a second embodiment for preventing dew condensation in the space communicating with the water level display plate. The relay box 5 is provided with an access valve 18 which is connected to a charge hose with a push claw and communicates with the inside to evacuate or enclose gas or liquid. First, the access valve 18 is connected to a charge hose connected to a vacuum pump to evacuate the interior. Then, for example, a charge hose is connected to the nitrogen cylinder and the relay box 5 is filled with the nitrogen gas 19. At this time, the filling pressure should be higher than atmospheric pressure. In this way, the space inside the waterproof tube 3 including the inside of the relay box 5 and the space inside the water level display plate 1 are also filled with the dry nitrogen gas 19, so that no dew condensation occurs and the pressure is equal to or higher than the atmospheric pressure, so that the air enters from the outside. Nothing. The filling gas does not have to be nitrogen gas as long as it is a dry gas. For example, it may be dry air or carbon dioxide.

FIG. 12 shows a third embodiment for preventing dew condensation in the space communicating with the water level display plate. An access valve 18 is attached to the relay box 5. First, a charge hose is connected to the vacuum pump from the access valve 16 to evacuate the inside. Then, for example, a charge hose is connected to the oil tank to fill the relay box 5 with the oil 20. In this way, the space inside the waterproof tube 3 including the inside of the relay box 5 and the space inside the water level display plate 1 is also filled with the oil 20, and the oil has both insulating properties and hydrophobic properties, so that it does not adversely affect the electronic circuit. Since it is hydrophobic, even if a small amount of water is mixed in the upper part, it is unlikely that it will reach the water level display plate 1. The liquid to be filled is not limited to oil as long as it is a liquid having both insulating property and hydrophobic property.

FIG. 13 shows a fourth embodiment for preventing dew condensation in the space communicating with the water level display plate. An access valve 18 is attached to the relay box 5. First, a charge hose is connected to the vacuum pump from the access valve 16 to evacuate the inside. Then, for example, a charge hose is connected to a cylinder of hydrofluorocarbon and the relay box 5 is filled with the hydrofluorocarbon liquid 21a. Most of hydrofluorocarbons have a saturated pressure of atmospheric pressure or more at room temperature and have an insulating liquefied gas. It is not necessary to fill the hydrofluorocarbon liquid 21a too much. In this way, the space inside the waterproof tube 3 including the relay box 5 and the space inside the water level display plate 1 is partially filled with the hydrofluorocarbon liquid 21a, and the rest is filled with the hydrofluorocarbon gas 21b, so that dew condensation does not occur, Since the pressure is higher than atmospheric pressure, air will not enter from the outside. Even if a slight leak occurs somewhere in the gas space, the leaked gas is compensated by the liquid being vaporized, so that the atmospheric pressure or higher can be maintained for a long time. Therefore, dew condensation can be prevented for a long period of time. For example, HFC245fa is a hydrofluorocarbon whose saturation pressure at room temperature is equal to or higher than atmospheric pressure and not so high, and has an ozone depletion potential of 0 and a low global warming potential. Other than that, the liquefied gas may be an insulating and harmless liquefied gas whose saturation pressure at room temperature is not less than atmospheric pressure and not so high.

1 Water Level Display Plate 1a Frame 1b Lightning Plate 2 Pipe Joint 3 Electric Wire 4 Waterproof Tube 5 Relay Box 6 Pipe Joint 7 Waterproof Cable 8 Plug 9 Receptacle 10 Control Box 11 Interpolation Side Plate 12 Cover Plate 13 Lead Wire 14 Connector 15 Waterproof Tube 16 Pipe Joint 17 desiccant 18 access valve 19 nitrogen gas 20 oil 21a hydrofluorocarbon liquid 21b hydrofluorocarbon gas

Claims (10)

A plurality of water level display boards installed while changing the height so as to correspond to each water level set in stages,
A control box for controlling the energization of the water level display plate,
A relay box interposed between the control box and the water level display plate,
Electric wires that are electrically connected to the water level display plate are independently covered with waterproof tubes that waterproofly connect the relay box and the water level display plate, and the waterproof tube is S at the end portion connected to the water level display plate. Characterized by being curved into a letter-shape or an inverted S-shape,
Lightning type water level display device. The waterproof tube is curved at an allowable bending radius of the material,
The electric water level display device according to claim 1. Further comprising a protective cover for housing a waterproof tube waterproofly connected to the water level indicator plate,
The protective cover includes an interpolation side plate that interpolates a gap between adjacent water level display plates and a cover plate that covers the waterproof tube,
The interpolating side plate is a gauge that defines the interval between adjacent water level display plates, and protects the side surface of the waterproof tube on the water level display plate side, and the cover plate displays the front surface and the water level of the waterproof tube. Characterized in that it protects the opposite side of the plate,
The lightning-type water level display device according to claim 2. A waterproof cable in which a plug is attached to one end and the other end is electrically connected to the control box,
Further comprising a receptacle attached to the relay box and capable of being electrically connected to the plug,
In the inside of the relay box, the electric wire for energizing the water level display plate and the receptacle are electrically connected,
The electric water level display device according to claim 1. The control box and the relay box are waterproofly connected by a waterproof tube, an electric wire for energizing the water level display plate is electrically connected to the control box through the waterproof tube,
The electric water level display device according to claim 1. Characterized in that a desiccant is hermetically sealed inside the relay box,
The electric water level display device according to claim 1. A feature that an access valve for ventilation is attached to the relay box,
The electric water level display device according to claim 1. A dry gas is sealed from the access valve, and the pressure in the relay box and in the space continuous with the relay box is set to atmospheric pressure or higher.
The electric type water level display device according to claim 7. Insulating and hydrophobic liquid is sealed from the access valve, and is filled in the relay box and a space continuous with the relay box.
The electric type water level display device according to claim 7. At least a part of the insulating liquefied gas having a saturation pressure at atmospheric pressure or higher from the access valve is filled in a liquefied state, and is filled in the relay box and the space continuous with the relay box.
The electric type water level display device according to claim 7.

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