JPH0334249Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pressing filter plate for a filter press equipped with a diaphragm for pressing a cake.

(Prior art) The above-mentioned filter press filter plate usually has a core plate with a thick wall on the periphery, and diaphragms are covered on both sides of the core plate. The diaphragm was easily damaged because it was directly attached to the thick part of the plate. In addition, in order to eliminate such drawbacks, as shown in Japanese Utility Model Publication No. 55-52890, a lip that engages with the outer circumferential surface of the core plate is formed on the peripheral edge of the diaphragm, and the lip is connected to the outer circumferential surface of the core plate. A frame-shaped outer frame that is screwed onto the diaphragm has also been developed, but the structure is complicated and the entire press filter plate must be removed from the filter press in order to replace the diaphragm. There was a drawback that the diaphragm could not be easily attached or detached.

(Purpose of the invention) The present invention was completed with the aim of solving these conventional drawbacks, and creating a compressed filter plate for a filter press that has a simple structure, allows easy attachment and detachment of the diaphragm, and is free from the risk of damaging the diaphragm. It is something that

(Structure of the invention) The present invention provides grooves on both sides of a thick part formed on the periphery of the core plate, and a series of protrusions protruding from the center of the periphery of the thick part. A diaphragm is formed on both sides of the core plate, the core plate having a protrusion that fits into the groove and a lip that engages with the slope, on both sides of the core plate. The outer movement of the lip of the diaphragm is suppressed by having an inner peripheral surface of a mounting member screwed onto the tip of the projection from both sides of the core plate parallel to the filtering surface of the diaphragm. The illustrated embodiment will be described in detail below.

In FIG. 1, reference numeral 1 denotes a core plate made of synthetic resin, the periphery of which is formed into a thick part 2, and in the center of both sides of the thick part 2 there is a series of holes extending around the entire circumference of the core plate 1. A groove 3 is provided. Further, the corners of the outer circumferential surface 4 of the thick part 2 are cut out from both sides, and a series of protrusions 5 having a thickness of about 1/2 of the thick part 2 are formed at the center of the periphery of the thick part 2. Slanted surfaces 12, 12 are formed on both sides of the protrusion 5 to cut inward toward the base of the protrusion 5, and bolt insertion holes 6 are formed in the protrusion 5 at appropriate intervals. A diaphragm 7 is mounted on both sides of the core plate 1, and has a series of protrusions 8 on its peripheral edge that fit into the grooves 3 of the core plate 1, and a diaphragm 7 on the slope 12 of the core plate 1. It is provided with a lip 9 bent at a right angle to engage. The lower surface of the lip 9 is formed into a slope corresponding to the slope 12. These diaphragms 7
The protrusion 8 is tightly fitted into the groove 3 of the core plate 1, and the lip 9 is
is mounted on the core plate 1 in a state where it is engaged with the slope 12, and then fixed to the core plate 1 by the mounting member 10. The mounting member 10 is a rod-shaped or frame-shaped member that is screwed onto the tip of the protrusion 5 of the core plate 1 from both sides parallel to the filtering surface of the diaphragm 7 with bolts 11 or the like.
The inner circumferential surface fixes the outer circumferential surface of the lip 9 of the diaphragm 7 to suppress the outward movement of the lip 9 and prevent the diaphragm 7 from coming off the core plate 3. Note that the mounting member 10 may be divided into appropriate lengths or may be integrated as a whole.

All of the devices configured in this way are used by being attached to a filter press in the same way as conventional compressor filter plates, but the diaphragm 7 is a recess provided in the thick wall portion 2 on the periphery of the core plate 1. The protrusion 8 in the groove 3
At the same time, the lip 9 is engaged with the slopes 12 formed on both sides of the protrusion 5 on the periphery of the thick wall portion 2 and biting inward from both sides, and mounting members are attached on both sides of the protrusion 5 parallel to the filter surface. 10 is attached and the lip 9 is fixed by its inner circumferential surface, and in particular, since the lip 9 having a shape to engage with the slope 12 is engaged, the diaphragm 7 can be properly covered. When pressing the cake, the core plate 1
Even if compressed air is introduced between the diaphragm 7 and the diaphragm 7 and the diaphragm 7 bulges outward, the lip 9 of the diaphragm 7 will not come off the core plate 1, and the diaphragm 7 will remain inside the mounting member 10. Since the diaphragm 7 is fixed to the core plate 1 while suppressing outward movement by the circumferential surface, no pressure force is applied to the diaphragm 7, and the diaphragm 7 will not be damaged even if used for a long time. Furthermore, the pressing filter plate of the filter press is subjected to a large tightening force by a hydraulic cylinder or the like during filtration, but the mounting member 10 is not connected to the diaphragm 7.
Since the diaphragm is directly attached to the protrusion 5 of the core plate 1 by screwing or the like without intervening, there is no possibility that excessive force will be applied to the diaphragm due to this tightening force and the diaphragm will be damaged. Further, when it becomes necessary to replace the diaphragm, the diaphragm 7 can be easily removed by simply removing the mounting members 10 that are attached to the tips of the protrusions 5 of the core plate 1 from both sides parallel to the filtration surface. This work can be carried out with the pressing filter plate attached to the filter press, and even when the mounting member is removed, the diaphragm 7 can be attached to the slope 9 of the core plate 1.
Since the diaphragm 7 can be engaged with the diaphragm 2 and supported independently on the core plate 1, the installation work is easy, and the diaphragm 7 can be easily replaced.

(Effects of the invention) As is clear from the above explanation, the present invention has a simple structure and allows the diaphragm to be easily attached and detached.Furthermore, since no pressure force or stress concentration is applied to the diaphragm, it will not damage the diaphragm. It is of great practical value as it eliminates the drawbacks of conventional squeeze filter plates for filter presses.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing the main part of an embodiment of the present invention. 1...core plate, 2...thick part, 3...concave groove, 5...
...Protrusion, 7...Diaphragm, 8...Protrusion, 9...
...Rip, 10...Mounting member, 12...Slope.

Claims (1)

[Scope of utility model registration request] A groove 3 is provided on both sides of a thick part 2 formed on the periphery of the core plate 1, and a series of protrusions 5 protruding from the center of the periphery of the thick part 2 are provided at the base of the protrusion 5. Slope 12 that cuts inward from both sides,
12, and both sides of the core plate 1 are covered with a diaphragm 7 having a protrusion 8 fitting into the groove 3 and a lip 9 engaging the slope 12 on the peripheral edge thereof. To prevent the outward movement of the lip 9 of the diaphragm 7, a mounting member 10 is screwed onto the tip of the protrusion 5 from both sides of the core plate 1 parallel to the filtering surface of the diaphragm 7.
A pressing filter plate for a filter press, characterized in that it has an inner circumferential surface and is suppressed.