A new filter plate sealing structure of filter press

Abstract

The utility model discloses a novel filter press filter plate sealing structure, including setting on the one side lateral wall of filter plate frame and located the annular sealing groove of filter cloth periphery, and the annular sealing groove is placed with the annular sealing ring of rubber material, and the annular sealing ring, the inside lateral wall of annular sealing ring is provided with the V type expansion groove of annular arrangement, the other side lateral wall of filter plate frame is equipped with the annular sealing strip corresponding with annular sealing groove position, when the adjacent filter plate frame is closed, and the annular sealing strip extrudes annular sealing ring, the utility model discloses the inside lateral wall of annular sealing ring is provided with the V type expansion groove of annular arrangement, and V type expansion groove is towards the sealing of filter plate frame, when filter plate extrusion each other, filtrate is pressed into V type expansion groove, under the hydraulic action, the sharp corner body leans tightly and presses the plate, further improves the sealing effect, makes the sealing from single ring change into double ring, and the sealing performance has been improved greatly.

Description

Technical Field

[0001] This utility model relates to the technical field of filter plate sealing, specifically a novel filter plate sealing structure for a filter press. Background Technology

[0002] A filter press is a machine that separates solids from liquids by applying mechanical pressure to one side of the filter medium. It is an industrially applied solid-liquid separation device. Filter presses were already used in chemical production as early as the beginning of the 18th century. Currently, filter presses are widely used in industries such as chemical, pharmaceutical, metallurgical, mineral processing, and environmental protection, and have significant application value.

[0003] During filter press applications, slurry spraying due to unreliable filter plate sealing is quite common. To improve the sealing conditions of the filter press, rubber sealing strips are usually installed on the top, bottom, left, and right sides of the filter plate sealing surface to ensure the reliability of the filter press seal. However, this method only uses a single-ring sealing structure formed by rubber sealing strips, which is a simple sealing structure. Furthermore, the high pressure generated during filtration can easily lead to unsatisfactory sealing results. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a novel filter plate sealing structure for filter presses.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a novel filter plate sealing structure for a filter press, including an annular sealing groove disposed on one side wall of the filter plate frame and located around the filter cloth, and an annular sealing ring made of rubber is placed in the annular sealing groove, and an annular V-shaped expansion groove is formed on the inner side wall of the annular sealing ring.

[0007] The filter plate frame has an annular sealing strip on the other side wall corresponding to the position of the annular sealing groove. When the adjacent filter plate frames are closed, the annular sealing strip squeezes the annular sealing ring.

[0008] As a preferred technical solution of this utility model, the inner upper end of the annular sealing ring is provided with an inwardly protruding strip, and the side wall of the filter plate frame is provided with an avoidance groove to avoid the protruding strip after two adjacent filter plate frames are closed, so that the upper and lower sides of the protruding strip abut against and fit against the filter plate frame, and the V-shaped expansion groove is provided on the protruding strip.

[0009] As a preferred embodiment of this invention, the annular sealing ring has a hard annular intermediate body inside.

[0010] In a preferred embodiment of this invention, the annular intermediate body is a metal ring.

[0011] As a preferred embodiment of this utility model, the top of the V-shaped expansion groove is provided with an R-shaped pointed body.

[0012] As a preferred embodiment of this utility model, the V-shaped expansion groove faces the sealing part of the filter plate frame.

[0013] As a preferred embodiment of this invention, the annular sealing ring is made of one of the following materials: hydrogenated nitrile rubber and polyetheretherketone.

[0014] The beneficial effects of this utility model are:

[0015] 1. In this novel filter press filter plate sealing structure, the filter plate frames are sealed with an annular sealing ring, which is a traditional single-ring sealing structure. Then, an annular V-shaped expansion groove is opened on the inner side wall of the annular sealing ring, and the V-shaped expansion groove faces the sealing part of the filter plate frame. When the filter plates are squeezed against each other, the filter pressure is injected into the V-shaped expansion groove. Under the action of hydraulic pressure, the sharp corners of the filter plates tilt outward and press tightly against the pressure plate, further improving the sealing effect and changing the seal from a single ring to a double ring, which greatly improves the sealing performance.

[0016] 2. In this novel filter press filter plate sealing structure, an inwardly protruding strip is provided on the upper inner side of the annular sealing ring. The side wall of the filter plate frame is provided with a clearance groove that avoids the protruding strip after two adjacent filter plate frames are closed, so that the upper and lower sides of the protruding strip abut against and fit against the filter plate frame. A V-shaped expansion groove is provided on the protruding strip. In this way, after two filter plate frames are closed, the two sides of the V-shaped expansion groove abut against and fit against the filter plate frame. This facilitates the flow of filter fluid into the V-shaped expansion groove. Under the action of hydraulic pressure, the sharp corners of the groove tilt outward and fit tightly against the pressure plate, thus achieving a better sealing effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of a novel filter plate sealing structure for a filter press according to this utility model;

[0019] Figure 2 This is a schematic diagram of the installation of an annular sealing ring for a novel filter plate sealing structure of a filter press according to this utility model;

[0020] Figure 3 This is a schematic diagram of the annular sealing ring of a novel filter plate sealing structure for a filter press according to this utility model.

[0021] In the diagram: 1. Filter plate frame; 2. Filter cloth; 3. Annular sealing groove; 4. Annular sealing ring; 5. V-shaped expansion groove; 6. Annular sealing strip; 8. Annular intermediate body; 9. Protruding strip; 10. Circumvention groove; 11. R-shaped sharp corner body. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] Example: Figure 1 , Figure 2 , Figure 3 As shown, this utility model discloses a novel filter plate sealing structure for a filter press, including an annular sealing groove 3 disposed on one side wall of the filter plate frame 1 and located around the filter cloth 2. An annular sealing ring 4 made of rubber is placed in the annular sealing groove 3. The annular sealing ring 4 has an annularly arranged V-shaped expansion groove 5 on its inner side wall. The filter plate frame 1 is a conventional filter plate frame 1, and the filter cloth 2 is also a conventional filter plate structure on a filter press. Since this utility model improves the sealing mechanism between the filter plate frames 1, the structure of the filter plate frame 1 and the filter cloth 2 will not be described in detail here, and existing filter plates can be used.

[0024] On the other side wall of the filter plate frame 1, there is an annular sealing strip 6 corresponding to the position of the annular sealing groove 3. When adjacent filter plate frames 1 are closed, the annular sealing strip 6 squeezes the annular sealing ring 4. In this utility model, the annular sealing ring 4 between the filter plate frames 1 is a traditional single-ring sealing structure. Then, an annular V-shaped expansion groove 5 is opened on the inner side wall of the annular sealing ring 4, and the V-shaped expansion groove 5 faces the sealing point of the filter plate frame 1. When the filter plates are squeezed against each other, the filter pressure is injected into the V-shaped expansion groove. Under the action of hydraulic pressure, the sharp corners of the filter plates tilt outward and press tightly against the pressure plate, further improving the sealing effect and changing the seal from a single ring to a double ring, which greatly improves the sealing performance.

[0025] The annular sealing ring 4 has an inwardly protruding strip 9 on its inner upper end. The side wall of the filter plate frame 1 has a relief groove 10 that avoids the protruding strip 9 after two adjacent filter plate frames 1 are closed, so that the upper and lower sides of the protruding strip 9 abut against the filter plate frame 1. The V-shaped expansion groove 5 is set on the protruding strip 9. In this way, after two filter plate frames 1 are closed, the two sides of the V-shaped expansion groove 5 abut against the filter plate frame 1, which facilitates the flow of filtrate into the V-shaped expansion groove. Under the action of hydraulic pressure, the sharp corners of the groove tilt outward and press against the pressure plate, thus achieving a better sealing effect and preventing the V-shaped expansion groove 5 from closing together due to excessive compression, which would make it difficult for the filtrate to enter the V-shaped expansion groove.

[0026] The annular sealing ring 4 has a rigid annular intermediate body 8 inside. The annular intermediate body 8 is a metal ring. A metal ring with a certain strength and rigidity is embedded inside the annular sealing ring 4. When the filter plates are squeezed against each other, the metal ring plays a supporting role to prevent the overall deformation of the sealing element, especially to prevent the thickness from becoming thinner, thereby ensuring that the compression on the sealing surface remains unchanged and preventing sealing failure.

[0027] The top of the V-shaped expansion groove 5 is provided with an R-shaped pointed body 11, which provides a better sealing effect. The R-shaped pointed body 11 effectively disperses stress concentration, avoids cracking at right angles, and improves the contact pressure distribution at the sealing interface. Its curved contour helps to form a progressive sealing contact zone, which is the same as the effect of the V-shaped sealing ring in the hydraulic sealing system, and will not be explained further here. The V-shaped expansion groove 5 faces the sealing area of ​​the filter plate frame 1.

[0028] The annular sealing ring 4 is made of one of hydrogenated nitrile rubber and polyetheretherketone, which is durable and has a long service life.

[0029] Working principle: This new type of filter press filter plate sealing structure uses a traditional single-ring sealing structure with an annular sealing ring 4 between the filter plate frames 1. Then, an annular V-shaped expansion groove 5 is opened on the inner side wall of the annular sealing ring 4, and the V-shaped expansion groove 5 faces the sealing point of the filter plate frame 1. When the filter plates are squeezed against each other, the filter fluid is pumped into the V-shaped expansion groove. Under the action of hydraulic pressure, the sharp corners of the filter plates tilt outward and press tightly against the pressure plate, further improving the sealing effect and changing the seal from a single ring to a double ring, which greatly improves the sealing performance.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel filter plate sealing structure for a filter press, characterized in that, It includes an annular sealing groove (3) set on one side wall of the filter plate frame (1) and located around the filter cloth (2), and an annular sealing ring (4) made of rubber is placed in the annular sealing groove (3), and an annular sealing ring (4) has an annular V-shaped expansion groove (5) on its inner side wall. On the other side wall of the filter plate frame (1), there is an annular sealing strip (6) corresponding to the position of the annular sealing groove (3). When the adjacent filter plate frames (1) are closed, the annular sealing strip (6) squeezes the annular sealing ring (4).

2. The novel filter plate sealing structure for a filter press according to claim 1, characterized in that, The inner upper end of the annular sealing ring (4) is provided with an inwardly protruding strip (9), and the side wall of the filter plate frame (1) is provided with a relief groove (10) to avoid the protruding strip (9) after two adjacent filter plate frames (1) are closed, so that the upper and lower sides of the protruding strip (9) abut against and fit against the filter plate frame (1), and the V-shaped expansion groove (5) is provided on the protruding strip (9).

3. The novel filter plate sealing structure for a filter press according to claim 1, characterized in that, The annular sealing ring (4) has a hard annular intermediate body (8) inside.

4. The novel filter plate sealing structure for a filter press according to claim 3, characterized in that, The annular intermediate (8) is a metal ring.

5. The novel filter plate sealing structure for a filter press according to claim 1, characterized in that, The top of the V-shaped expansion groove (5) is provided with an R-shaped pointed body (11).

6. The novel filter plate sealing structure for a filter press according to claim 1, characterized in that, The V-shaped expansion groove (5) faces the sealing part of the filter plate frame (1).

7. The novel filter plate sealing structure for a filter press according to claim 1, characterized in that, The annular sealing ring (4) is made of one of hydrogenated nitrile rubber and polyetheretherketone.

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