JPS6041352Y2 - Dehydration equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention is directed to dewatering objects that contain a large amount of water, such as sludge discharged from water treatment equipment (hereinafter referred to as sludge).

The present invention relates to a dewatering device for removing water from water, and particularly relates to a dewatering device that injects sludge into a closed container and compresses and dehydrates it by expanding a diaphragm.

Some conventional dewatering devices are constructed so that sludge is stored inside a closed container, and the sludge is compressed and dehydrated by a piston that is inserted into the closed container and moves up and down.The driving source for driving the piston up and down is , hydraulic cylinders are widely used.

However, in such a configuration, when the squeezing pressure is increased, the hydraulic cylinder and piston suddenly become larger because the strength is required to correspond to the increase in pressure.

For this reason, the inertial mass of the movable parts rapidly increases, so-called transition times such as the time to transition from the waist compression process to the pressure release process, and the time from the pressure release process to the compression process until effective compression starts, are long. This leads to the disadvantage that work efficiency decreases.

Conventionally, as a dewatering device to eliminate such drawbacks, a diaphragm made of soft rubber or the like that expands and contracts is housed in a closed container, an opening is provided in the closed container, and the diaphragm is expanded toward the opening. A system has been proposed in which the expansion causes the sludge sealed in the closed container to be compressed and dehydrated.

However, in such a configuration, only one part of the diaphragm expands greatly toward the opening, and the other part is restrained by the airtight container, so expansion is extremely small. Due to expansion, relative sliding occurs between the sealed container and the diaphragm at the boundary between the inflated part and the non-inflated part, and over a long period of time, the diaphragm protrudes from the sealed container, causing damage to the tire. When a flam protrudes from a closed container, it expands indefinitely and ruptures in a very short period of time, resulting in a short service life.

It is an object of the present invention to provide a dewatering device which eliminates the drawbacks of the prior art, can suppress a decrease in work efficiency even when the compressing dewatering pressure is increased, and has a long life.

In this invention, when a fluid is pressurized into a diaphragm, a local elongation occurs that is approximately inversely proportional to the rubber thickness, and a part of the diaphragm, specifically the boundary between the part in contact with the sealed container and the part facing the opening, is It has been confirmed through experiments that relative sliding occurs, and this sliding is restrained by a protrusion prevention member.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and in FIG. 1, a substrate 1 and a bottom plate 2 are fixedly integrated with connecting bolts (not shown) to constitute an outer casing of a sealed container. There is.

A cutout recess that substantially constitutes a space 9 is formed in the lower end surface of the substrate 1, and an inlet opening 3 and an outlet opening 4 are formed in this space 9, respectively.

This space 9 houses a tire flam 5 which is integrally formed into a substantially flat bag made of an elastic material such as a soft comb, and a rigid flat plate 6 is placed in the hollow part 10 of the tire flam 5. Interpolated.

A pair of boss members 7A and 7B are welded onto one plane of the flat plate 6, and a pair of conduits 8A and 8B inserted into the substrate 1 are screwed into the boss members 7A and 7B, respectively.

Both conduits 8A and 8B are supported so as to be pulled up relative to the substrate 1, and therefore, the upper wall portion of the diaphragm 5 is fixed between the flat plate 6 and the ceiling surface of the cutout recess of the substrate 1. .

Note that the inner surface of the upper wall portion of the diaphragm 5 is welded to the upper surface of the flat plate 6.

The peripheral edge of the diaphragm 5 is thicker than the upper and lower walls thereof.

A protrusion prevention member 11 is fixed to the lower surface of the peripheral edge of the notch recess of the substrate 1 with bolts 12.
The inner end portion of the diaphragm 5 is restrained so as to press down on the lower surface of the periphery of the diaphragm 5.

Next, the action will be explained.

While sludge is injected into and discharged from the space 9 through the inlet opening 3 and the outlet opening 4, pressure fluid is supplied into and discharged from the hollow portion 10 through the conduits 8A and 8B, causing the lower wall of the diaphragm 5 to expand. , the contracted sludge is squeezed and dewatered.

In this case, the movable part that performs compression dehydration is the diaphragm 5.
Since only the lower wall portion of the diaphragm 5 and the peripheral edge portion of the diaphragm 5 are restrained by the protrusion prevention member 11, there will be no rubbing.

Therefore, it is possible to extend the life of the diaphragm.

Furthermore, since the durability of the diaphragm is increased, the compression and dewatering pressure can be increased, and in this case, it is possible to avoid a sudden increase in the size of the diaphragm and the sealed container, and it is possible to suppress a decrease in work efficiency.

As explained above, according to the present invention, even if the pressing and dewatering pressure is increased, a decrease in work efficiency can be suppressed, and the life of the diaphragm can be extended.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. 1... Board, 2... Bottom plate, 3...
...Inlet opening, 4...Outlet opening, 5...
...Diaphragm, 6...Flat plate, 8A, 8B
... Conduit, 9 ... Space, 10 ...
...Hollow part, 11... Protrusion prevention member.

Claims (1)

[Scope of utility model registration request] In a dehydration apparatus, a diaphragm that expands and contracts is housed in a closed container, and an object to be dehydrated is injected into the outside of the diaphragm in the container, and the object is dehydrated by the expansion of the diaphragm. a bottom plate is fixed to a substrate having a gap with the notch recess,
Fitting the diaphragm into the notch recess,
A dewatering device characterized in that the peripheral edge of the diaphragm is held between protrusion prevention members arranged on the outer peripheral edge of the notched recess.