JPS6032942Y2 - Pressure dehydration equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that removes water from substances containing a large amount of ice, such as sludge discharged from water treatment equipment. The present invention relates to a press dehydration device that dehydrates water by doing so.

BACKGROUND ART Conventionally, a so-called press dewatering apparatus for dewatering water-containing sludge or the like by pressing has a structure in which a material to be pressed, such as sludge, is housed inside a hollow outer casing, and the material to be pressed, such as sludge, is compressed and dehydrated by a pressurizing means.

Usually, the pressurizing means has a structure in which a piston inserted into the outer casing is raised and lowered by driving a hydraulic cylinder or the like, and compressed between the piston and the outer casing.

However, in conventional compression dehydration equipment, when trying to increase the compression pressure and improve the dehydration effect, the need for mechanical strength causes the components such as hydraulic cylinders and pistons to rapidly increase in size and weight. There is.

Further, in such a case, the inertial mass of the movable member increases, resulting in a slow operation speed and a reduction in squeezing efficiency.

For this reason, if a diaphragm made of a soft rubber material with excellent responsiveness is used as the squeezing means, and the diaphragm is allowed to expand and contract while housed in a closed container, it will be able to withstand sufficiently high pressure and can be used as a squeezing dewatering means. suitable.

However, when such a diaphragm is used, when the pressurized fluid filled inside is discharged, a local negative pressure is generated at the discharge port due to the fluid flow, and since the diaphragm is made of rubber material, the rubber layer There is a problem in that the liquid is attracted to the discharge port and blocks the fluid discharge passage.

The present invention has focused on the above-mentioned problems, and has a diaphragm structure with excellent responsiveness as a squeezing means, and in particular provides a squeezing dewatering device in which the rubber layer does not block the flow path when discharging pressurized fluid. purpose.

In order to achieve the above object, the compression dewatering device according to the present invention accommodates a diaphragm that expands and contracts when a pressurized fluid is introduced and discharged into a hollow container provided with an inlet and an outlet opening for the pressed material. , this diaphragm is placed in the hollow container and is shaped into a bag container by covering a rubber layer with a flat plate to which a pressurized fluid conduit is attached and welding it to the conduit attachment side surface; In addition, a means for separating the pressurized fluid outlet and the rubber layer is provided in the inner space of the diaphragm.

This separation means may be fixed or driven.

With this configuration, the pressurized fluid in the diaphragm can be reliably and smoothly discharged, and the squeezing efficiency can be improved.

EMBODIMENT OF THE INVENTION Below, the Example of the compression dewatering apparatus based on this invention is described in detail with reference to drawings.

FIG. 1 shows a sectional view of the compression dewatering apparatus according to this embodiment.

As shown in this figure, the compression dehydration device has a hollow container 10
This container 10 is formed by fixing a top plate 12 and a bottom plate 14 together with a connecting bolt or the like, and in particular, a hollow part 16 is formed by cutting out a part of the inner wall surface of the top plate 12. There is.

Opposite sides of such a hollow container 10 are formed with an inlet opening 18 and an outlet opening 20, these openings 18
The material to be pressed is supplied into the container 10 through the container 10.

The material to be pressed may be enclosed in a pair of water-permeable belt-shaped filter cloths and introduced continuously.

On the other hand, a diaphragm 22 is provided in the hollow part 16 of the container as a pressurizing means for squeezing and dewatering the pressed material introduced into the hollow container 10.

This diaphragm 22 has a flat plate 24 disposed within the notch of the upper plate 12.

This flat plate 24 has a pressurized fluid introduction opening 26 and a discharge opening 2.
8 is bored.

Further, the flat plate 24 has bosses 30 on its upper surface corresponding to the inner wall surface of the hollow portion 16 of the upper plate 12, corresponding to the openings 26 and 28.
．． 32 is attached by welding.

Pressurized fluid supply conduits 34 to these bosses 30 and 32
A discharge conduit 36 is screwed onto the upper plate 12, and the conduits 34, 36 pass through the upper plate 12 and are led to the outside.

The flat plate 24, to which the conduits 34, 36 are attached in this way, is provided with a rubber layer 38 that covers the entire plate.

The rubber layer 38 covers the upper surface of the flat plate 24, i.e. the conduit 34.3.
It is welded and bonded only to the surface of the attached side of the flat plate 24, and forms a fluid-filled space 40 between it and the lower surface of the flat plate 24, and is configured in the shape of a bag container.

Particularly, at the position of the fluid discharge opening 28 in the fluid filling space 40, a separation means 42 is provided to prevent the opening 28 and the rubber layer 38 from coming into close contact.

This separation means 42 has a rod-shaped bracket 44 fixed to the inner wall surface of the fluid discharge conduit 36, and is suspended in the direction of the filling space 40.

An adhesion prevention member 46 that comes into contact with the inner wall surface of the rubber layer 38 is attached to the tip of the bracket 44 .

Such a separation means 42 has a length of the bracket 44 such that the rubber layer 38, which contracts when the pressurized fluid is discharged, does not close the opening 28.

Such a compressing and dewatering device does not require a conventional hydraulic cylinder or pressurizing piston, and the movable member for pressurizing is only the lower half of the rubber layer 38 of the diaphragm 22, so it is possible to improve the efficiency of the compressing work. can.

In particular, when the pressurized fluid is discharged, there is no fear that the rubber layer 38 will be absorbed into the opening 28 and close to the opening 28 and block the discharge flow path, so that the pressurized fluid can be discharged quickly.

Therefore, the waiting time for squeezing work can be significantly shortened.
A so-called quick return motion becomes possible.

Next, FIG. 2 shows a compression dewatering apparatus according to a second embodiment.

This embodiment differs from the first embodiment in that the separation means is of a different configuration.

That is, in this second embodiment, the separation means 42A
is a shaft 48 inserted into a conduit 36 attached to the flat plate 24.
An adhesion prevention member 50 is provided, the tip of which can protrude into the fluid-filled space 40, and which can press against the inner wall surface of the rubber layer 38.

Further, the opposite end of the shaft 48 is connected to a reciprocating mechanism 52.

The reciprocating mechanism 52 is a piston-cylinder mechanism in which the shaft 48 is connected to a piston 54, and the cylinder 56 is supplied with and discharged working fluid from a nozzle 58, 60 to cause the shaft 48 to reciprocate. .

Note that the adhesion prevention member 50 has a smaller diameter than the inner diameter of the boss 32.

Note that the other configurations are the same as those in the first embodiment, so the same numbers are given and explanations are omitted.

In this embodiment, when discharging the fluid press-fitted into the filling space 40, the working fluid is supplied from the nozzle 58 to the shaft 40.
8 to lower the adhesion prevention member 50 to the rubber layer 3.
8 to prevent the discharge opening 28 from being blocked by the rubber layer 38.

Therefore, especially according to this embodiment, the adhesion prevention member 5
0 can be raised and lowered, in addition to preventing flow path blockage, it does not cause movement resistance of the pressed material supplied into the hollow part 16, and a large amount of pressed material can be supplied into the hollow part 16. , it becomes possible to further improve the squeezing efficiency.

As described above, according to the present invention, the means for pressurizing the pressed material has a diaphragm structure, and even if negative pressure is generated due to the discharge of the pressurized fluid, the discharge function is not impaired. It is possible to improve the efficiency of the pressing operation, and the effect is that the return to the state of each pressing period can be performed quickly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a compression dewatering apparatus according to a first embodiment of the present invention, and FIG. 2 is a sectional view of the same apparatus according to a second embodiment. 10...Hollow container, 16...Hollow part,
18... Inlet opening, 20... Outlet opening, 22... Diaphragm, 24... Flat plate, 28... Pressurized fluid discharge opening, 34.36...
... Conduit, 38 ... Rubber layer, 40 ...
...Fluid filling space, 42...Separation means, 44.
... Bracket, 46, 50 ... Adhesion prevention member, 48 ... Shaft, 52 ... Reciprocating mechanism.

Claims (3)

[Scope of utility model registration request] (1) A diaphragm is housed in a hollow container provided with an inlet opening and an outlet opening for the material to be pressed, and is capable of expanding and contracting by introducing and discharging a pressurized fluid, and this diaphragm is placed inside the hollow container. A flat plate with a pressurized fluid conduit attached thereto is covered with a rubber layer and welded to the conduit side surface to form a bag container shape, and at least a pressurized fluid outlet and a rubber layer are provided in the inner space of the diaphragm. A compression dewatering device characterized by being provided with means for separating from the . (2) The separating means is characterized by comprising a bracket that hangs down from the pressurized fluid discharge opening and is fixedly attached, and an adhesion prevention member that is attached to the tip of the bracket and whose lower surface is pressed against the inner wall surface of the rubber layer. and billing water equipment. (3) The separation means includes a shaft inserted into the pressurized fluid discharge opening, an adhesion prevention member capable of pressing the inner wall surface of the rubber layer at one end of the shaft, and a reciprocating mechanism provided at the other end of the shaft. The compression dewatering apparatus according to claim 1, characterized in that it consists of: