JPH04110105U - Diaphragm in filter press - Google Patents

Abstract

(57) [Summary] [Purpose] This invention relates to improving a diaphragm used in a filter press, and aims to provide a diaphragm that can disperse repeated loads and withstand long-term use. [Structure] In the diaphragm attached to the core plate, the bending points of the diaphragm that occur when the diaphragm is expanded are bent at two points on the front and back, and a groove is provided on the bending side surface to prevent bending. It is made easier to bend, disperses the stress applied to bent parts, and reduces fatigue caused by repeated use, making it durable for long-term use.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on the diaphragm used in filter presses to compress cakes. Regarding improvements.

0002

[Conventional technology]

The diaphragm used in this kind of filter press is There is a No. 006 idea. In this invention, the diaphragm's shape is as shown in Figure 2. Extend the curved surface toward the center of the core plate to give it some slack, and leave a gap between it and the sloped part of the core plate. I try to have it.

0003

[Problem that the idea aims to solve]

However, in the conventional method described above, when pressure fluid is injected into the diaphragm, When the fluid enters the gap and the pressure fluid is removed, it will sag as mentioned above. Therefore, the diaphragm bends at the intersection of the sealing surface of the core plate and the sloped part. . In other words, each time the diaphragm expands and contracts, one part of the diaphragm bends, causing long-term damage. If used for a long time, this part will break.

0004

[Means to solve the problem]

Therefore, this idea eliminates the need to concentrate on one point the part that bends each time it expands and contracts. It also prevents the diaphragm from breaking by making it easier to bend. The gist of this is that the central part of both sides is made thinner, and the outer periphery part is made thinner. A diaphragm that is attached to a core plate that has a thick wall and has a picture frame shape. On the outer periphery of the core plate, there is a series of bent edges that fit into the engagement grooves provided on the sealing surface of the core plate. In addition to providing a protrusion, the surface side of the diaphragm is provided with a sealing surface of the core plate. This diaphragm is located on the outer circumferential side than the inner end and when this diaphragm is attached to the fuselage. A bending section is located near the inner end of the sealing surface of the filter plate where the diaphragm faces. It has a series of grooves.

[0005]

[Effect]

The diaphragm according to this invention is constructed as described above, and is capable of injecting pressure fluid. Then, the diaphragm has its core plate side surface bordered by the inner edge of the sealing surface of the core plate. The outer surface of is bent along the concave line. In other words, the sealing surface of the conventional filter plate and core plate The inner edge of the inner edge was bent along one line, but now it is bent along the two lines above to reduce stress. It is dispersed to improve durability. In addition, the grooves on the surface side tend to bend easily. This makes it possible to further reduce stress generation. The following is based on the drawing. This idea will be explained in detail.

[0006]

【Example】

FIG. 1 is a schematic longitudinal sectional side view showing the state of use of the diaphragm according to this invention. In the figure, 1 is a core plate, 2 is a diaphragm attached to both sides of the core plate, and 3 is a filter plate. Ru. Figure 2 shows details of the structure of the diaphragm attachment part and the parallel state with the filter plate. Therefore, the diaphragm 2 has a protrusion 2a provided on its periphery and an engagement groove 1 provided on the core plate 1. This protrusion 2a is fixed to the core plate 1 with a presser plate 4 after being engaged with the protrusion 2a.

[0007] The inner surface of the diaphragm 2 is normally connected to the sealing surface 1b of the core plate 1. It is arranged to be in close contact with the core plate surface along the slope 1e, and on the other hand, the diaphragm 2 A groove 2 is formed on the surface of the core plate 1 at a position outward from the inner edge 1d of the sealing surface of the core plate 1. b. The groove 2b is formed by an inner edge 3b of the sealing surface 3a of the filter plate 3. I try to face it. In addition, the code 3c and the code 2c are the filter plate 3 and the code 2c, respectively. This figure shows the cake pressing protrusion provided on the diaphragm 2 and the diaphragm 2.

[0008] The diaphragm 2 according to this invention is configured as described above, and is used to squeeze a cake. When pressurized fluid is injected in order to At this time, the diaphragm 2 according to this invention has the shape shown in FIG. As shown, the contact edge (3b) between its surface and the sealing surface of the filter plate and the core plate 1 on its back surface. Since the contact edge (1d) with the sealing surface of the When stretched, the bent parts on the front and back will be bent at two shifted boundary lines, Distributes and reduces bending stress compared to conventional ones that bend at one boundary line. can do. In addition, the grooves 2b provided on the surface make it easy to bend the core plate 1. Pressure fluid can be prevented from entering between the surface and the surface of the mold.

[0009]

[Effect of the idea]

In this way, the diaphragm according to this invention has two lines on the front and back sides when inflated. Since it bends by bending, the stress related to the part can be dispersed when bending, and Concave grooves are provided on the surface of the bending side, making it easy to bend and preventing the contact between the diaphragm and the sealing surface of the core plate. This can prevent high-pressure fluid from entering between the two and improve the sealing performance.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing the state in which the diaphragm of this invention is used.

FIG. 2 is an enlarged view of a portion of FIG. 1 showing how the diaphragm is attached to the core plate.

FIG. 3 is an enlarged longitudinal cross-sectional side view of a main part showing a state in which a conventional diaphragm is attached to a core plate.

[Explanation of symbols]

1 Core plate 1a Engagement groove 1b Seal surface 2 Diaphragm 2a Projection 2b Groove 3 Filter plate 3a Seal surface

Claims (1)

[Scope of utility model registration request] Claim 1: A diaphragm 2 attached to a core plate 1 having a frame-like structure with a thin central part and a thick outer peripheral part on both sides, the sealing surface 1b of the core plate 1 being attached to the outer peripheral part of the diaphragm 2. A series of bent protrusions 2a are provided on the core plate side that fit into the engagement grooves 1a provided in the diaphragm 2.
is located on the outer circumferential side of the inner end of the sealing surface 1b of the core plate 1, and is located on the outer circumferential side of the sealing surface 3a of the filter plate 3 that the diaphragm 2 faces when the diaphragm 2 is attached to the aircraft body. A diaphragm in a filter press that is provided with a series of grooves 2b for bending in a portion located near the inner end.