JPS5936051B2 - rubber dam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber product used for weirs for intake of agricultural water, seawalls at high tides, seawater dams under river mouths, etc.

2. Description of the Related Art Automatic tipping weirs made of iron have been known as weirs for water level adjustment, such as intake of agricultural water and seawater damming at river mouths.

This iron automatic overturning weir is operated by hydraulic cylinders, etc., and has the disadvantage that maintenance work is extremely difficult and it is impossible to install it on soft ground.

In recent years, so-called rubber-made water level adjustment weirs have been developed and put into practical use, which are made of rubber bags that are easy to install and maintain by allowing fluids such as air and water to enter and exit.

In order to form and collapse such rubber weirs j and ``i'', fluids such as air and water must be supplied and discharged.

However, when the fluid sealed inside the rubber is discharged and the weir is collapsed, the water from the river, etc. that was dammed by the rubber will splash onto the collapsed rubber, and as a result, the fluid will not be completely discharged. A part of the rubber part was crushed by the water pressure and blocked the fluid inlet and outlet.1. In some cases, abnormal lodging occurred where the subsequent evacuation function stopped completely.

For this reason, as shown in Figure 1, conventional methods have been to install multiple inlet and outlet ports and connect them to pipes buried in the riverbed so that the rubber can be crushed from any direction. The construction work was extremely complex and difficult, and sometimes the upper pipes were damaged, rotted, leaked, etc.

In addition, there were many disadvantages such as water easily collecting in the pipes buried in the riverbed and air not being able to escape.

The purpose of this invention is to eliminate the above-mentioned drawbacks and to obtain complete collapse of rubber with simple piping. In a rubber product that stands up and falls down, a protrusion that heals in the longitudinal direction and has rigidity to withstand water pressure and the rubber's own weight is provided in the expanded part that becomes tubular when gas is filled, and the rubber fixes the protrusion. The pipe is made of rubber and extends only on one side of the river bank slope excluding the river bed where the pipe is connected to the vicinity of the connection port of the enclosed gas exhaust conduit that communicates with the bulge.

Next, the rubber product of this invention will be explained with reference to the drawings.

2 and 3 show a rubber weir body suitable for use in the present invention.

The rubber dam main body is made of a flexible rubber-like elastic band having at least one peeled part extending in the longitudinal direction at an appropriate position in the thickness direction.

The belt-shaped body 1 shown in Fig. 2 is formed in advance as a hollow body, and has a peeled part, that is, a swelling part 1a, which becomes a pipe by filling a gas such as air, and a longitudinal direction on one side thereof. The belt-like body 1 shown in section 3-1 has one end open.

The rubber weir body shown in FIGS. 2 and 3 is a preferred example, and is not limited to this.

That is, the bag may be made from a conventionally widely used rubber sheet on site, or the riverbed portion may constitute a part of the bulging portion of the rubber weir body.

In order to form the band-shaped body 1 shown in FIG. 2, for example, two raw raw rubber sheets are placed one on top of the other on a hot surface plate of a molding plate, and the intermediate region between the raw raw rubber sheets is spread in the longitudinal direction. A mold release agent may be interposed in the region defining the swollen portion 1a, and the press may be integrally molded at the vulcanization temperature of the raw rubber sheet.

At this time, a desired reinforcing layer can be obtained by appropriately embedding a rubberized canvas or the like between the rubber sheets.

Next, a method of sealing the ends of the above-mentioned band-shaped body 1 will be described.

It is of course possible to vulcanize and bond the ends of the strip 1 shown above in advance. Since this is impossible, it is preferable to abut presser plates on both sides of the ends of the strip 1 after vulcanization molding and secure them with bolts or the like.

Alternatively, the end of the band-shaped body 1 may be directly fixed to the river bank using a holding plate.

In this way, the rubber weir main body can be easily configured to have an arbitrary length depending on the width of the river, etc., which is convenient.

7. Note that it is possible to provide a connection port for a conduit for sealing gas such as air into the expanded portion 1a at an appropriate position on the rubber weir body, and in this embodiment, as will be described later, the rubber weir body attached to the river bank It is provided at one end of the.

In order to fix the rubber weir main body to the riverbed and riverbank, as shown in FIG. Insert the anchor bolt into the through hole provided in the plate-shaped portion 1b.

Fix the abutment plate with the butt nuts 6.

In this way, the rubber weir body can be fixed to the riverbed while reliably maintaining airtightness.

A feature of the present invention is that, in the rubber weir body 1 fixed to the river bed and both rivers as described above, a protrusion that resists water pressure stays in the longitudinal direction of the swollen part 1a that becomes tubular due to the presence of gas. 3 was extended.

It is preferable that the protrusion 3 extends to the vicinity of the fluid connection port.

Extending the protrusion 3 in this way not only prevents the inner surface of the rubber weir from coming into close contact when the rubber weir collapses, as shown in FIG. 4, but also forms a ventilation space 7 continuous in the longitudinal direction near the protrusion. .

As the protruding part 3, any shape can be used as long as it is made of a material that has rigidity to withstand water pressure, a rubber weir, and a nine-mouth load.

for example. There are hollow bodies or solid bodies made of rubber, synthetic resin, metal, etc.

The cross section of such a hollow body or solid body can have any shape such as circular, rectangular, polygonal, etc.

The protruding part 3 is inserted into the expanded part 1a from one end when the rubber weir main body 1 is fixed to a riverbed, and extends over almost the entire longitudinal direction of the rubber weir.

In this case, one or more protrusions may extend
Incidentally, the protruding portion 3 may be adhered to the inner surface of the swollen portion 1a depending on the safety.

In FIG. 4, the protrusion 3 consists of a flexible hose.

- The flexible hose 3 is extended over almost the entire length of the rubber weir, and a part of the circumferential surface of the hose is adhered to the inner surface of the rubber weir.

In addition, in order to further increase the rigidity of the flexible hose 3, a fluid material that solidifies at room temperature can be added to the hollow portion of the hose.

Examples of fluid materials that solidify at room temperature include asphalt, thermoplastics, raw plastics,
Temperature-dependent substances such as Minas heavy oil, paraffin, liquid rubber, cement, urethane.

Substances that undergo chemical changes such as epoxy etc.

It is preferable that the fluid material 'r' is pumped from one end of the hollow part and placed inside the hollow part.

After being sent to the hollow part, the fluid solidifies at room temperature, so it is connected to the rubber dam attached to the riverbed by staying in the longitudinal direction of the inside of the bulge 1a as shown in Figure 4. A ventilation space 7 is formed.

In order to form a weir by enclosing a gas such as air into a rubber weir body extended on a riverbed, a piping system for enclosing and exhausting gas as shown in FIG. 5, for example, may be used.

In FIG. 5, 8 is a pipe for pumping air into the expanded portion 1a, B1. B2 is a valve, E is an ejector, P is an air compressor, and 1/'' is a pump.

Further, 9 is a pipe connecting the safety device A and the inside of the rubber dam.

Although safety devices are not specifically shown here, there are ones that utilize the water level difference by filling the interior with liquid, and ones that utilize the mechanical elastic force of rubber or springs.

First, when the rubber weir is to be erected, it is sufficient to open the valve B1 and close the valve B2, and then use an air compressor or a pop P to forcefully feed gas such as air from the pipe 8 into the expanded portion 1a.

In this case, even if the internal pressure in the rubber layer exceeds the appropriate iE pressure due to the gas being erroneously pumped into the distended part, the internal pressure of the rubber weir will be accurately maintained through the pipe 9 (Safety device A
Therefore, the excessive internal pressure is released by the operation of the safety device A, and as a result, no damage to the rubber salt occurs.

FIG. 6 shows a state in which the rubber weir is erected in this way to form a weir.

Next, in order to collapse the rubber weir, the sealed gas may be released into the atmosphere by simply opening the valve, but in the piping system of FIG. 5, valve B1. With B2 open, when the pump P is operated to forcefully feed gas, the gas sealed in the expanded portion 1a is forcibly exhausted from the valve B2 by the action of the ejector E, and the rubber weir collapses.

That is, due to the relationship with the water flow, the rubber weir body immediately begins to collapse at the point where the balance between the internal pressure within the bulging portion 1a and the water 1[7 applied from the outside is lost].

In a conventional rubber weir, if the injection port is provided only at one end of the Kohiro weir as shown in the example shown in the figure, for example, if the central part of the rubber weir collapses first, the inner wall of the bulge will be damaged at the collapsed part. The fluid that is sealed between the ends where no inlet is installed will become unable to be evacuated, resulting in abnormal collapse.In contrast, according to the present invention, the fluid that is sealed between the ends where no injection port is provided will collapse from somewhere. As shown in Fig. 4, the protrusion 3, which has the rigidity to withstand water pressure and the weight of the rubber weir, extends over almost the entire longitudinal direction of the rubber weir. When the weir is collapsed, a ventilation space 7 that is continuous in the direction of completion is formed.

As a result, the inner walls of the expanded portion 1a do not come into close contact with each other due to water pressure.

Further, since the ventilation space 7 extends to the vicinity of the injection hole in the longitudinal direction of the protrusion 3, the gas that should remain in the rubber weir body passes through the ventilation space 7, moves to the connection port, and is exhausted.

In this way, the rubber weir body is completely collapsed.

As described above, according to the present invention, the rubber weir can be easily raised and lowered by simply providing a connection port at one end of the rubber weir, without using multiple injection ports unlike conventional rubber weirs. Moreover, it can be fully implemented.

In the illustrated example, the rubber weir body 1 is integrally formed into a belt shape by press vulcanization, so that it can be easily manufactured with a thick wall and high rigidity.
The ventilation space 7 is reliably formed due to the presence of the vent space 7.

However, it goes without saying that the present invention can also be applied to a rubber weir formed by forming a conventionally widely used rubber sheet into a bag shape by on-site processing.

As described above, the rubber weir of the present invention has a protrusion 3 that resists water pressure and extends over almost the entire longitudinal direction inside the rubber weir, thereby making it possible to discharge gas within the bulge 1a. In order to prevent the inner wall surface of the swollen part 1a from coming into close contact due to water pressure and the weight of the rubber dam when it collapses due to There is no abnormal lodging, and complete lodging can always be expected.

Furthermore, in terms of equipment, it is simple with only one connection port, and has excellent workability in that no piping to the riverbed is required, and operability in raising and lowering the weir'D.

Furthermore, if the rubber weir body is formed by belt-like integral press molding as shown in the illustrated example, the collapsed shape will be a flat shape, and will not obstruct the flow of rivers, etc., and will have excellent wear resistance and durability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the piping system of a conventional rubber weir, FIGS. 2 and 3 are perspective views of a strip forming the rubber weir of the present invention, and FIG. 4 shows the rubber weir of the present invention on a riverbed. FIG. 5 is an explanatory diagram showing the vicinity of the connection port of the rubber weir of the present invention and its piping system, and FIG. 6 is a cross-sectional view showing the rubber weir of the present invention in an upright state. DESCRIPTION OF SYMBOLS 1... Band-shaped hollow body, 1a... Expanded body, 1b... Plate-shaped part, 2... Canvas, 3... Projection part, 4... River bed,
5... Anchor bolt, 6... Nut, 7... Ventilation space, 8, 9... Pipe, B1. B2...Valve,
E...Ejector, P...Pump, A...Safety device.

Claims (1)

[Claims] 1. It is installed across a river, etc., and is made of rubber and rises and falls when gas is filled in and exhausted. It is rigid enough to withstand water pressure and the rubber's own weight by staying in the longitudinal direction of the expanded part that becomes tubular when gas is filled. A protruding part having a diameter of 100 mm is provided, and the protruding part is made of rubber and extends to the vicinity of the connection port of a conduit for exhausting the enclosed gas that communicates with the swollen part only on one side of the riverbank slope area excluding the riverbed part to which the rubber rubber is fixed. Made of rubber, characterized by the fact that it is made of rubber.