Filter unit of plate-and-frame filter press

Abstract

The utility model belongs to the technical field of filtering equipment, and relates to a filtering unit of a plate-and-frame filter press, which comprises an elastic lantern ring and a filter cloth piece, the elastic lantern ring is of an I-shaped structure and comprises an axial ring and radial rings connected at two ends of the axial ring, the filter cloth piece is sleeved in the elastic lantern ring through a center hole matched with the axial ring, and the filter cloth piece is arranged in the elastic lantern ring. A hot melting ring is arranged between the filter cloth piece and the elastic lantern ring, the two sides of the hot melting ring are in contact connection with the outer side face of the filter cloth piece and the inner side face of the radial ring respectively, an inner ring of the hot melting ring extends inwards in the radial direction to form a plurality of positioning pieces, and the ends of the positioning pieces are connected with the outer wall of the axial ring in an abutting mode. And the hot melting ring, the elastic lantern ring and the filter cloth piece are welded and fixed by adopting high-frequency induction current as a heat source. The filtering unit of the plate-and-frame filter press provided by the utility model has the advantages of firm connection, good sealing performance and long service life.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of filter equipment relates to a filter unit of plate and frame filter press. BACKGROUND

[0002] The plate and frame filter press is a professional solid-liquid separation equipment, which is widely used and covers multiple industry fields, mainly including chemical industry, medicine, food, environmental protection and other industrial applications. It is also widely used in coal washing, petroleum, metallurgy, light industry, textile and sewage treatment industries. In order to facilitate the replacement of filter cloth bags, replaceable filter units are usually used in plate and frame filter presses, and the filter unit generally includes filter cloth and filter cloth fixing structure.

[0003] Chinese invention patent application CN109045783A (publication date: 2018-12-21) discloses a new filter cloth sleeve of filter press, which comprises a filter cloth piece and a filter cloth sleeve. The filter cloth sleeve is composed of an elastic sleeve ring and a filter cloth piece which are bonded together at a certain temperature by an adhesive ring, so that the three are fully integrated into one. The edges of the filter cloth piece are uniformly paved with a waterproof elastic sealing layer, and the waterproof elastic sealing layer is a colloidal filter layer.

[0004] The filter cloth sleeve connects the elastic sleeve ring and the filter cloth piece through the adhesive ring, and the bonding temperature is: when the material of the filter cloth piece is polypropylene, the bonding temperature is 70-80℃; when the material of the filter cloth piece is polyamide, the bonding temperature is 90-100℃; when the material of the filter cloth piece is polyethylene, the bonding temperature is 80-90℃. As can be seen, the bonding temperature is below 100℃. However, the plate and frame filter bag is often used in 80℃ liquid, and the domestic adhesive material can only be used in air at room temperature. If it is used in high temperature liquid, hydrolysis will occur, resulting in the separation of the elastic sleeve ring and the filter cloth piece. UTILITY MODEL CONTENTS

[0005] The utility model provides a filter unit of plate and frame filter press in view of the deficiency of prior art, has the advantages such as firm connection, good sealing, long service life.

[0006] To solve the above technical problems, the purpose of the utility model is realized by the following technical scheme:

[0007] The application discloses a filter unit of a plate-and-frame filter press, which comprises an elastic sleeve ring and filter cloth pieces, the elastic sleeve ring is in an I-shaped structure and comprises an axial ring and radial rings connected at both ends of the axial ring, the filter cloth pieces are sleeved in the elastic sleeve ring through central holes matched with the axial ring, a hot melt ring is arranged between the filter cloth pieces and the elastic sleeve ring, the two sides of the hot melt ring are in contact connection with the outer side of the filter cloth pieces and the inner side of the radial ring respectively, the inner ring of the hot melt ring extends a plurality of positioning pieces in the radial direction, the end of the positioning piece is in abutting connection with the outer wall of the axial ring, and the hot melt ring, the elastic sleeve ring and the filter cloth pieces are welded and fixed by using high-frequency induction current as a heat source.

[0008] In the filter unit of the plate-and-frame filter press, the inner side of the radial ring is provided with a plurality of limiting protrusions, the limiting protrusions comprise limiting rods and limiting head portions, limiting holes matched with the limiting protrusions are arranged on the filter cloth pieces, the limiting holes are sleeved on the limiting rods and form an axial limiting structure with the limiting head portions; preferably, the height of the limiting rod is the same as the thickness of the filter cloth piece, the limiting rod and the limiting head portion are coaxially arranged, and the radial dimension of the limiting head portion is greater than that of the limiting rod; preferably, the limiting protrusions are arranged perpendicularly to the radial ring.

[0009] In the filter unit of the plate-and-frame filter press, the limiting protrusions and the limiting holes are located on the inner side of the inner ring of the hot melt ring, and the limiting protrusions, the limiting holes and the positioning pieces are arranged in a staggered manner.

[0010] In the filter unit of the plate-and-frame filter press, the limiting protrusions and the elastic sleeve ring are integrally formed.

[0011] In the filter unit of the plate-and-frame filter press, the hot melt ring and the filter cloth piece are both provided with two, and correspond to the two radial rings of the elastic sleeve ring respectively.

[0012] In the filter unit of the plate-and-frame filter press, the material of the elastic sleeve ring is rubber, preferably modified high-elasticity rubber, the material of the hot melt ring is hot melt adhesive sheet, metal for heating high-frequency induction current is arranged in the hot melt adhesive sheet, and the hot melt adhesive sheet is preferably a hot melt adhesive sheet with good heat resistance and high melting temperature.

[0013] In the filter unit of the plate-and-frame filter press, the welding temperature of the hot melt ring, the elastic sleeve ring and the filter cloth piece is greater than the melting temperature of the hot melt ring, and preferably greater than 400 DEG C. The temperature greater than 400 DEG C. can melt the surfaces of the elastic sleeve ring and the filter cloth piece at the same time. Since the welding time is very short (less than 10 seconds), water cooling of the heating body is simultaneously performed, so that the unwelded cloth surface is normal.

[0014] In the filter unit of the plate-and-frame filter press, preferably, the positioning pieces are uniformly arranged along the circumferential direction of the hot melting ring, the limiting protruding parts are uniformly arranged along the circumferential direction of the radial ring, and the limiting holes are uniformly arranged along the circumferential direction of the filter cloth piece.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The filter unit of the plate-and-frame filter press is firmly connected to the elastic collar to form a filter unit for use in the plate-and-frame filter press.

[0017] 2. The hot melting ring is positioned by the positioning pieces, which is coaxial with the elastic collar to ensure the stability of welding. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is the axial sectional view of the utility model;

[0019] Fig. 2 is the radial sectional view of the utility model;

[0020] Fig. 3 is the structural schematic view of the hot melting ring of the utility model;

[0021] Reference signs: 1, elastic collar; 11, axial ring; 12, radial ring; 13, limiting protruding part; 14, limiting rod; 15, limiting head; 2, filter cloth piece; 3, hot melting ring; 31, positioning piece. DETAILED DESCRIPTION

[0022] The utility model will be further described in conjunction with the specific embodiments and the drawings, referring to Figs. 1-3 :

[0023] The application discloses a filter unit of a plate-and-frame filter press, which comprises an elastic sleeve ring 1 and a filter cloth piece 2, the elastic sleeve ring 1 is in an I-shaped structure and comprises an axial ring 11 and radial rings 12 connected at both ends of the axial ring 11, the filter cloth piece 2 is sleeved in the elastic sleeve ring 1 through a central hole matched with the axial ring 11, a hot melting ring 3 is arranged between the filter cloth piece 2 and the elastic sleeve ring 1, the two sides of the hot melting ring 3 are in contact connection with the outer side of the filter cloth piece 2 and the inner side of the radial ring 12 respectively, the inner ring of the hot melting ring 3 extends a plurality of positioning pieces 31 radially inward, the end of the positioning piece 31 is in abutting connection with the outer wall of the axial ring 11, and the hot melting ring 3 is fixed by welding with the elastic sleeve ring 1 and the filter cloth piece 2 by taking high-frequency induced current as a heat source.

[0024] Specifically, before welding, the filter cloth piece 2 of the hot melting ring 3 is sequentially sleeved into the axial ring 11 of the elastic sleeve ring 1 through the radial ring 12 (for the convenience of display, the size of the filter cloth piece 2 in the drawing is smaller than that of the actual filter cloth piece), and the elastic sleeve ring 1, the hot melting ring 3 and the filter cloth piece 2 are mutually adhered, then the preassembled assembly is placed on an induction coil of a high-frequency induced current welding device, the device is started, the high-frequency induced current generates eddy current in the electric conductor of the hot melting ring 3 instantaneously, the temperature of the hot melting ring 3 is instantaneously raised to a temperature sufficient for melting, and the hot melting ring 3 is adhered to the elastic sleeve ring 1 and the filter cloth piece 2 after melting to form a fixed-structure filter unit.

[0025] Further, the inner side of the radial ring 12 is provided with a plurality of limiting protrusions 13, the limiting protrusion 13 comprises a limiting rod 14 and a limiting head 15, the filter cloth piece 2 is provided with a limiting hole matched with the limiting protrusion 13, the limiting hole is sleeved on the limiting rod 14 and forms an axial limiting structure with the limiting head 15; preferably, the height of the limiting rod 14 is the same as the thickness of the filter cloth piece 2, the limiting rod 14 and the limiting head 15 are coaxially arranged and the radial dimension of the limiting head 15 is larger than that of the limiting rod 14; preferably, the limiting protrusion 13 is perpendicular to the radial ring 12. By arranging the limiting protrusion 13 and the limiting hole, the filter cloth piece 2 can be ensured to be located at a predetermined position of the elastic sleeve ring 1 before welding, the welding accuracy is ensured, meanwhile, a certain limiting effect can be provided after welding, and the connection between the filter cloth piece 2 and the elastic sleeve ring 1 is ensured to be firm.

[0026] In the embodiment, the limiting protrusion 13 and the limiting hole are located at the inner side of the inner ring of the hot melting ring 3, and the limiting protrusion 13 and the limiting hole are arranged in a staggered mode with the positioning piece 31, so that interference between the limiting protrusion 13 and the limiting hole is avoided.

[0027] Preferably, the limiting protrusion 13 is integrally formed with the elastic sleeve ring 1.

[0028] In the embodiment, the hot melting ring 3 and the filter cloth piece 2 are both provided with two, and correspond to the two radial rings 12 of the elastic sleeve ring 1 respectively, that is, each elastic sleeve ring 1 is connected with two layers of parallel filter cloth pieces 2.

[0029] In the embodiment, the material of the elastic sleeve ring 1 is rubber, preferably modified high-elasticity rubber, and the material of the hot melting ring 3 is hot melting glue sheet, and the hot melting glue sheet is provided with metal for heating high-frequency induction current, preferably hot melting glue sheet with good heat resistance and high melting temperature.

[0030] Further, the welding temperature of the hot melting ring 3 and the elastic sleeve ring 1 and the filter cloth piece 2 is greater than the melting temperature of the hot melting ring 3, and preferably, the welding temperature of the hot melting ring 3 and the elastic sleeve ring 1 and the filter cloth piece 2 is greater than 400 DEG C, and the temperature greater than 400 DEG C can melt the surfaces of the elastic sleeve ring 1 and the filter cloth piece 2 at the same time.

[0031] Preferably, the positioning piece 31 is uniformly arranged along the circumference of the hot melting ring 3, the limiting protruding part 13 is uniformly arranged along the circumference of the radial ring 12, and the limiting hole is uniformly arranged along the circumference of the filter cloth piece 2; in the embodiment, the positioning piece 31, the limiting protruding part 13 and the limiting hole are all provided with four.

[0032] The above embodiment is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A filter unit of a plate-and-frame filter press, comprising a resilient collar (1) and a filter cloth sheet (2), characterized in that, The elastic sleeve ring (1) is in a H-shaped structure, comprising an axial ring (11) and radial rings (12) connected at both ends of the axial ring (11), the filter cloth piece (2) is sleeved in the elastic sleeve ring (1) through the central hole matched with the axial ring (11), the filter cloth piece (2) and the elastic sleeve ring (1) are provided with a hot melt ring (3), the two sides of the hot melt ring (3) are in contact with the outer side of the filter cloth piece (2) and the inner side of the radial ring (12) respectively, the inner ring of the hot melt ring (3) extends radially outward a plurality of positioning pieces (31), the end of the positioning piece (31) is in contact with the outer wall of the axial ring (11), and the hot melt ring (3), the elastic sleeve ring (1) and the filter cloth piece (2) are welded and fixed by using high-frequency induction current as a heat source.

2. A filter unit for a plate-and-frame filter press according to claim 1, characterized in that The inner side of the radial ring (12) is provided with a plurality of limiting protrusions (13), the limiting protrusion (13) comprises a limiting rod (14) and a limiting head (15), the filter cloth piece (2) is provided with a limiting hole matched with the limiting protrusion (13), and the limiting hole is sleeved on the limiting rod (14) and forms an axial limiting structure with the limiting head (15).

3. A filter unit for a plate-and-frame filter press according to claim 2, characterized in that The limiting protrusion (13) and the limiting hole are located on the inner side of the inner ring of the hot melt ring (3), and the limiting protrusion (13) and the limiting hole are arranged in a staggered manner with the positioning piece (31).

4. A filter unit for a plate-and-frame filter press according to claim 2, characterized in that The limiting protrusion (13) is integrally formed with the elastic sleeve ring (1).

5. A filter unit for a plate-and-frame filter press according to claim 1, characterized in that The hot melt ring (3) and the filter cloth piece (2) are both provided with two, and correspond to the two radial rings (12) of the elastic sleeve ring (1) respectively.

6. A filter unit for a plate-and-frame filter press according to claim 1, characterized in that The material of the elastic sleeve ring (1) is rubber, the material of the hot melt ring (3) is a hot melt adhesive sheet, and the hot melt adhesive sheet is provided with a metal for heating by high-frequency induction current.

7. A filter unit for a plate-and-frame filter press according to claim 1, characterized in that The welding temperature of the hot melt ring (3), the elastic sleeve ring (1) and the filter cloth piece (2) is greater than 400 DEG C.

8. A filter unit for a plate-and-frame filter press according to claim 2, characterized in that The positioning pieces (31) are uniformly arranged along the circumference of the hot melt ring (3), the limiting protrusions (13) are uniformly arranged along the circumference of the radial ring (12), and the limiting holes are uniformly arranged along the circumference of the filter cloth piece (2).

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