WO2009127131A1

WO2009127131A1 - A sealing ring for the filter bag of a liquid filter

Info

Publication number: WO2009127131A1
Application number: PCT/CN2009/070642
Authority: WO
Inventors: 李超; 何向阳; 何晟
Original assignee: 上海闰铭精密技术有限公司
Priority date: 2008-04-17
Filing date: 2009-03-05
Publication date: 2009-10-22
Also published as: CN101559300A; CN101559300B

Abstract

A sealing ring (10) for the filter bag of a liquid filter comprises a body having a first bend (1) and a second bend (2), and a skirt (3) extending from the first bend (1). The upper sealing surface of the first bend (1) has an angle of 9-11 degree with the level, the skirt (3) has an angle of 48-52 degree with the upper sealing surface, the lower sealing surface of the skirt (3) has an angle of 4-6 degree with the level.

Description

Sealing ring for liquid filter bag

The present invention relates to a filtration separation technique, and more particularly to a seal for a liquid filter filter bag. Background technique

In the prior art, with the rapid development of the national economy and the improvement of people's living standards, people have higher and higher requirements for the quality of goods, and the application and requirements for filtration and separation technologies are also increasing. The current common problems are: The liquid filter bag and the filter cover and the filter chamber port are poorly sealed, and leakage often occurs, resulting in poor filtration accuracy and low efficiency. There is often a direct leakage of the upstream filtrate to be filtered. Downstream, it needs to be circulated and filtered, resulting in a decrease in filtration efficiency and product quality. At the same time, there are defects such as poor sealing of the sealing ring and the filter bag, easy to fall off, and inconvenient replacement. Summary of the invention

The object of the present invention is to provide a high-performance sealing mechanism for the liquid filter filter bag and the filter upper cover and the filter chamber joint portion, which can withstand the change of the filtration pressure and is highly adaptable to the deficiencies of the prior art. The liquid filter filter bag is sealed with a ring.

The object of the present invention is achieved by the following measures: A sealing ring for a liquid filter bag, which is special in that: the sealing ring is extended by the first-stage bending, the secondary bending body and the first-level bending. The upper end sealing surface of the first-stage bending is at an angle to the horizontal, and the skirt extending from the bending portion has a certain angle with the upper end sealing surface, and the lower end sealing surface of the skirt At a certain angle with the level.

The upper end sealing surface of the first-stage bending is at an angle to the horizontal, and the angle thereof is preferably 9 to 11 degrees.

The skirt extending from the first-stage bend has a certain angle with the upper end sealing surface, and the angle thereof is preferably 48 to 52 degrees.

The sealing surface of the lower end of the skirt is at an angle to the horizontal, and the angle thereof is preferably 4 to 6 degrees.

The outer edge of the secondary bending body has a plurality of flanges in the circumferential direction.

The inner edge of the secondary bending body is symmetrically disposed with a pair of ladder-shaped carrying handles.

Compared with the prior art, since the sealing ring for the liquid filter filter bag proposed by the present invention is used, the upper end sealing surface of the first bending end of the sealing ring and the lower end sealing surface of the skirt are respectively connected with the upper cover or the pressure of the liquid filter. The cover and filter chamber port joints are linearly combined to form a high-performance sealing mechanism that is less prone to leakage. A plurality of flanges in the circumferential direction of the outer edge of the secondary bending body are integrally melted with the filter bag, and the strength is large enough to withstand a certain impact force. It is also convenient to replace the filter bag or clean the filter bag. The invention has reasonable structure, low production cost, improved sealing performance, improved filtration efficiency by 5%, effectively avoids circulating filtration, not only saves energy, but also achieves good economic benefits. BRIEF abstract

Specific features and properties of the present invention are further exemplified by the following examples and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing an embodiment of the present invention.

Figure 2 is a plan view of the embodiment of Figure 1.

Figure 3 is a partial enlarged view of a portion B of the embodiment of Figure 1.

Figure 4 is a partial enlarged view of a portion C of the embodiment of Figure 1.

Figure 5 is a schematic view of the liquid filter of the class A installed in the present embodiment.

Figure 6 is a schematic view of the liquid filter installed in the class B of the present embodiment.

Figure 7 is a force analysis diagram of the present embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments are described in detail below with reference to the accompanying drawings:

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing an embodiment of the present invention. The figure shows a sealing ring 10 for a liquid filter filter bag, which is composed of a first bending 1 and a second bending 2 body and a skirt 3 extending from the first bending; The upper end sealing surface of the stage bend is at an angle of 10 ° to the horizontal. When the filter upper cover 5 or the gland 6 is pressed, the pressure is linearly distributed on the circle of the upper end surface to achieve close contact; the bend is extended. The skirt is at an angle of 50° to the upper sealing surface. It has good elastic deformation during the stress process, and can adapt to various different and changing external forces. When the force is applied, the lower end sealing surface is distributed in a circular outward direction, which can be avoided. When the filtrate is flushed out, the filter bag is forced to contract inward to force the seal ring to deform; the lower end sealing surface of the skirt is at an angle of 5 ° to the horizontal, and the skirt is linearly distributed on the circumference of the skirt after the force is applied to achieve a tight seal. . The aforementioned angle is the result of multiple tests, and a good sealing effect is obtained. Explanation will be made below with reference to Figs. 4 and 5. Fig. 4 is a schematic view of the liquid filter of the class A installed in the present embodiment, and the upper cover 5 of the filter is directly pressed against the sealing surface of the upper end of the sealing ring 10. Fig. 5 is a schematic view of the liquid filter of the class B installed in the present embodiment, and the filter is pressed against the sealing surface of the upper end of the sealing ring by the pressure plate 6. This embodiment is mounted on the port of the liquid filter filtration chamber 11, the upper end sealing surface of the sealing ring and the filter The cover 5 or the pressure plate 6 corresponds to the side of the sealing ring, that is, the skirt and the upper sealing surface are at an angle of 50° corresponding to the side wall 7 of the filtering chamber port step, and the lower end sealing surface of the sealing ring corresponds to the lowering of the filtering chamber port step Plane 8; When the upper cover or pressure plate of the filter is pressed, the sealing surface of the upper end of the sealing ring is subjected to the F force, and the skirt is subjected to the F1 force, and the sealing ring is elastically deformed, as shown in Fig. 7, at this time, the sealing ring The height of the upper and lower sides is fixed, and the skirt protruding from the bend becomes smaller at an angle of 50° to the upper sealing surface. Since the deformation is within the allowable range of elastic deformation of the sealing material, the outer edge of the upper end surface is formed. The force of the filter cover or the end face of the pressure ring is linearly distributed. This is the first stage compression seal provided by the present invention, and the outer edge of the skirt is closely attached to the lower plane of the filter chamber port, and the force is also linearly distributed. This is the second-stage reinforced seal provided by the compression seal produced by the present invention, so that when the filtration pressure is changed, there is no obstacle, thereby achieving a tight seal effect. In addition, the force acting on the skirt can be decomposed to expand the skirt outward and increase the positive pressure of the skirt on the tank. The positive pressure can increase the sealing effect, and the force for expanding the skirt outward can prevent the filtrate from being flushed out. , causing the filter bag to shrink inward to force the seal to deform.

Figure 3 shows that the outer edge of the secondary bending body has a plurality of flanges in the circumferential direction. In the embodiment, the flanges 9 along the circumference are four, and the four flanges are thermally fused together with the filter bag, and have high strength, can withstand the impact of the filtrate, are not easy to fall off, and enhance the service life.

It can be seen from Fig. 2 that the inner edge of the secondary bending body is symmetrically provided with a pair of rectangular handles 4. The carrying handle is adapted to be clipped to replace the sealing ring and the filter bag, thereby avoiding the operator's hand touching the filtrate, which is especially important for a corrosive filtrate.

The above embodiments are not intended to limit the invention, and any technical solutions obtained by equivalent replacement or equivalent transformations fall within the scope of the present invention.

Claims

Rights request

1 . A sealing ring for a liquid filter filter bag, characterized in that: the sealing ring is composed of a primary bending, a secondary bending body and a skirt extending from the first bending; The curved upper end sealing surface is at an angle to the horizontal, and the skirt extending from the bend has a certain angle with the upper end sealing surface, and the lower end sealing surface of the skirt has a certain angle with the horizontal.

The sealing ring for a filter bag for a liquid filter according to claim 1, wherein the upper end sealing surface of the first-stage bending is at an angle to the horizontal, and the angle is preferably 9 to 11 degrees.

3 . The sealing ring for a filter bag for a liquid filter according to claim 1 , wherein the skirt extending from the first-stage bend has a certain angle with the upper end sealing surface, and the angle is preferably 48~. 52 degrees.

A sealing ring for a filter bag for a liquid filter according to claim 1, wherein the sealing surface of the lower end of the skirt is at an angle to the horizontal, and the angle is preferably 4 degrees.

A sealing ring for a filter bag for a liquid filter according to claim 1, wherein the outer edge of the secondary bending body has a plurality of flanges in the circumferential direction.

The sealing ring for a filter bag for a liquid filter according to claim 1, wherein the inner edge of the secondary bending body is symmetrically provided with a pair of ladder-shaped carrying handles.