JPS6250163B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press plate in a single filter press.

This type of squeezing consists of a substrate and an elastic body such as rubber that covers both sides of the substrate and has a curved surface, and after normal squeezing with all the plates stacked and tightened, the substrate and elastic body are By injecting fluid between them and expanding the elastic body into the chamber,
It is designed so that the slag can be further squeezed.

However, the strength of the elastic body of the compressed plate is reduced by half under high temperature or corrosive conditions.
In other words, for example, when comparing the case of passing an undiluted solution at a temperature of 60°C with the case of passing an undiluted solution at room temperature (15 to 20°C) for a pressing plate equipped with an elastic body made of natural rubber, in the former case In the latter case, the strength of the elastic body is reduced to about half that of the latter case. Therefore, under such conditions, there was a problem in that the elastic body was easily damaged, especially at the peripheral edges of the stock solution supply port and the liquid collection port, where the degree of deformation is large during over-squeezing.

An object of the present invention is to provide a structure for a press plate in a single filter press that has sufficiently high strength even under the above-mentioned high temperature or corrosive extreme conditions.

This invention will be described in detail below based on embodiments shown in the drawings.

In FIG. 1, a pressing plate 1 is composed of a substrate 2 and an elastic body 3 made of a rubber plate, and a stock solution supply port 4 is provided in the center thereof. Further, a liquid outlet 5 is provided at the upper right corner and a lower left corner of the pressing plate 1, and a pressing fluid inlet 7 is provided at the upper right corner thereof in an overhanging manner. A liquid collection port 6 is provided on the inner surface of the liquid outlet 5, and the liquid outlet 5 and the liquid collection port 6 are connected by a liquid passage 8.

In FIG. 2, there is a through hole 9 in the center of the substrate 2.
is bored, and annular recesses 10 are provided on both sides of the through hole 9, respectively. At the center of both elastic bodies 3, there is a recess 1 of the substrate 2, respectively.
An annular protrusion 11 is provided which is fitted into the opening 0 and 10 to form the stock solution supply port 4. The outer surfaces of both annular protrusions 11 are provided with recesses 12 at predetermined intervals, into which bolt heads or nuts can fit.
An annular core metal 13 with a U-shaped cross section is embedded inside the same to prevent the elastic body from elongating.
Both annular protrusions 11 are tightly fastened together by bolts and nuts 14 via the base plate 2. Each elastic body 3 includes a thick portion 15 surrounding the annular protrusion 11;
A connecting portion 17 is provided that gradually becomes thinner from the thicker portion 15 to the thinner outer surface portion 16. A thin rubber cover 18 having a U-shaped cross section and an annular shape is placed over both annular protrusions 11 that have been tightened together in this manner.

In FIG. 3, through holes 19 are drilled at the upper right corner and lower left corner of the substrate 2, and the through holes 19
Annular recesses 20, 20 are provided on both sides of the periphery, respectively. The annular recesses 2 of the respective substrates 2 are located at corresponding locations at the upper right corner and lower left corner of both elastic bodies 3.
An annular projection 21 is provided which fits into the liquid collection opening 6 within the liquid collection opening 6 . The outer surfaces of both annular protrusions 21 are provided with recesses 22 at predetermined intervals, into which bolt heads or nuts can be accommodated.
An annular core metal 23 with a U-shaped cross section is embedded inside the same, which is a reinforcing metal fitting to prevent the elongation of the elastic body.
Both annular protrusions 21 are tightly fastened together with bolts and nuts 24 via the base plate 2. Each elastic body 3 includes a thick portion 25 surrounding the annular protrusion 21;
A connecting portion 27 is provided that becomes gradually thinner from the thick portion 25 to the thinner oversurface portion 26.

In the above embodiment, the elastic bodies 3 are attached to both sides of the substrate 2, but the elastic bodies 3 only need to be attached to at least one side of the substrate 2.

As described above, the pressing plate of the filter press according to the present invention is composed of the substrate 2 and the elastic body 3 which is placed over at least one side of the substrate 2 and has a curved surface, and the elastic body 3 is supplied with a stock solution. Reinforcement fittings 1 are installed around the periphery of the port 4 and the liquid collection port 6.
3 and 23 are provided, respectively, and these annular projections 1
1 and 21, and connecting portions 17 and 27 that gradually become thinner from the thick portions 15 and 25 to the thinner oversurface portions 16 and 26, respectively, are provided. The peripheral edges of the raw solution supply port 4 and the liquid collection port 6, where the degree of deformation of the elastic body 3 is the largest in the over-squeezing operation, are reinforced and their wall thicknesses are gradually reduced, so that there is no possibility of high temperature or corrosive overconditions. Elastic body 3 also below
has sufficient strength to withstand this, and therefore has the effect that over-operation can be carried out smoothly even under the above conditions without causing damage to the elastic body 3.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view of the pressing plate, FIG. 2 is an enlarged cross-sectional view taken along the line of FIG. 1, and FIG. It is an enlarged sectional view along the line. 1... Pressing plate, 2... Substrate, 3... Elastic body,
4... Raw solution supply port, 5... Liquid outlet, 6... Liquid collection port, 7... Squeezing fluid inlet, 9, 9... Through hole, 10, 20... Annular recess, 11, 21... Annular Projection, 13, 23... Annular core metal (reinforcing metal fitting), 14... Bolt/nut, 15, 25...
Thick part, 16, 26... Excess part, 17, 27...
...Connection part, 18...Rubber cover.

Claims (1)

[Claims] 1 Consisting of a substrate 2 and an elastic body 3 that is placed over at least one side of the substrate 2 and has a curved surface, reinforcing metal fittings are attached to the peripheral edges of the stock solution supply port 4 and the liquid collection port 6 of the elastic body 3. Annular protrusions 11 and 21 having built-in annular protrusions 13 and 23 are respectively provided, and thick parts 15 and 25 surround these annular protrusions 11 and 21, and thin oversurface parts 16 and 25 extend from the thick parts 15 and 25, respectively. A pressing plate for a filter press, which is provided with connecting portions 17 and 27 that become gradually thinner as they reach 26.