CN201848171U - Composite sealing ring for filtration and separation - Google Patents

Abstract

The utility model discloses a composite sealing ring for filtration and separation. The sealing ring comprises a framework ring made of hard materials and an O ring made of soft materials, wherein the O ring is connected with the framework ring into a whole in the mode of injection molding. The composite sealing ring for filtration and separation has high sealing performance, can perfectly prevent liquid from seeping into a filter plant, and ensures the hardness and the strength of the sealing ring while improving the sealing performance. The composite sealing ring for filtration and separation has reasonable design and low production cost, and increases the filtration efficiency by 5 percent due to the high sealing performance so that internal leakage can be effectively avoided, thus not only saving energy resources, but also reducing the production cost and obtaining good economic benefit.

Description

Composite seals for filtration and separation

technical field

The utility model relates to a sealing element for filtration and separation, in particular to a sealing ring for a filter bag of a filter.

Background technique

Bag filters are widely used in various industries. As a sealing element, the sealing ring is a key component of the filter bag. The structure, manufacturing process and materials used of the sealing ring will all affect the sealing effect. Generally, a filter bag includes a bag bottom 12 and a sealing ring 11. As shown in FIG. Another part of the molecular structure or size is made of flexible materials that liquid or gas cannot pass through, such as cotton bag bottoms, polyester or polypropylene non-woven bag bottoms, etc. The filter bag is usually made of a supporting structure made of hard material and the bottom 12 of the bag, for example, a steel ring or a plastic ring is stitched to the bottom 12 of the bag, so as to support the bottom 12 of the bag. In the prior art, the combination of the hard material and the bottom of the bag, because the hard material and the bottom of the bag are not tightly combined, the sealing performance is poor, it is easy to cause leakage of the filtered liquid, and the filtering effect is poor, often requiring repeated filtration. The required filtering effect can be achieved, resulting in low production efficiency; the repeated use of the filter bag is also likely to reduce the service life of the filter bag and increase the replacement rate of the filter bag, thereby increasing the production cost.

Utility model content

The purpose of the utility model is to provide a composite sealing ring, which not only has better support strength, but also has higher sealing performance.

The composite sealing ring provided by the utility model is composed of a skeleton ring (1) made of hard material and an O-ring (2) made of soft material, the O-ring and the skeleton ring (1) ) as an integral structure. In particular, the O-ring (2) is fixed on the outside of the skeleton ring (1), and the upper part of the skeleton ring (1) is provided with a flange (3), and the section of the O-ring (2) is C-shaped and fixed outside the flange (3).

The composite sealing ring provided by the utility model has high sealing performance and can perfectly prevent liquid from penetrating into the filter equipment. The utility model adopts a composite structure in which an O-ring and a skeleton ring are connected as a whole, which increases the sealing performance and ensures the hardness and strength of the sealing ring at the same time. The utility model has reasonable structural design and low production cost. Due to the high sealing performance, the filtration efficiency is increased by 5%, effectively avoiding internal leakage, not only saving energy, but also reducing production costs, and achieving good economic benefits.

Description of drawings

As shown in Figure 1, it is a schematic structural view of a filter bag in the prior art;

As shown in Figure 2, it is a three-dimensional schematic diagram of a composite structure sealing ring for a filter bag of the present invention;

As shown in Figure 2, it is a cross-sectional schematic diagram of a composite structure sealing ring for a filter bag of the present invention.

Detailed ways

This embodiment provides a filter bag, including a bag bottom and a sealing ring, as shown in Figure 2, the sealing ring is made of a skeleton ring 1 made of a hard material and an O-ring made of a soft material 2, the O-shape is fixed on the skeleton ring 1 and has an integral structure, thus forming a sealing ring of a composite structure. The sealing ring is made of composite materials with different hardness and elasticity. The composite material refers to modifying the hard material and the soft material, and compounding them into one body by injection molding. In this way, the sealing ring not only has stronger rigidity and better strength, good supporting effect, but also has better sealing performance. The hard material can be natural plastic or artificial plastic, such as polypropylene (PP), polyethylene (PE), ethylene glycol formate (PET), polytetrafluoroethylene (PTEE), chlorinated polypropylene (PPC) , Teflon (PTFE) in one or more. Described soft elastic material can be rubber or silica gel material, as acrylonitrile-butadiene rubber (B-Buna N), fluorine rubber (Vinton), T-polytetrafluoroethylene (T-PTFE), S--silicone rubber (S- One or more of Silicone rubber) and E-EPDM. The selection of the above materials, in addition to considering the strength and sealing of the materials, can also consider the corrosion resistance, environmental protection and hygiene requirements of the selected materials according to the industry of the filter bag, and the selection meets international or national certification (such as ROHS, PAHS certification) raw materials, so that the filter bag can be widely used in the fields of food, medicine or chemical industry.

As shown in FIG. 2 , the O-ring 2 is fixed on the outside of the skeleton ring 1 . In this way, since the O-ring 2 has better elasticity and softness, the sealing ring composed of the skeleton ring 1 and the O-ring 2 can be well combined with different bag bottoms with larger dimensional errors, It not only has good sealing performance, but also reduces the requirements on the size of the bag bottom in the production process, reduces the generation of bag bottom waste and defective bag bottom, and improves production efficiency.

As shown in FIG. 2 or 3 , a flange 3 is provided on the upper part of the skeleton ring 1 , and the O-ring 2 has a C-shaped section and is fixed outside the flange 3 . In this way, when the bottom of the bag is pressed against the sealing ring, the O-ring 2 with better elasticity and tightness is sleeved on the outer side and top of the skeleton ring 1 at the same time, forming a double-sided sealing structure, which further increases The tightness of the combination of the sealing ring and the bag is improved, and the sealing performance of the sealing ring is further improved. The O-ring 2 and the bottom of the bag can be integrated in a hot-melt manner, so that the sealing ring and the bottom of the bag are integrated, and the sealing performance is further improved. The leakage of gas makes the filter bag meet the requirements of precision filtration. The skeleton ring 1 and the O-ring 2 can be integrated. In this way, the sealing ring is molded at one time during the production process, which reduces the manufacturing process and improves the production efficiency. In addition, this integrated structure has no connection gap, which further increases the sealing performance of the sealing ring. According to the requirements of the market for the appearance of the filter bag, the O-ring 2 and the skeleton ring 1 can be made into various colors, such as red, yellow, blue, gray, white, black, green or combinations thereof.

Claims (3)

1. a filtration is used composite sealing ring with separating, and it is characterized in that: the skeleton ring (1) that described sealing ring (11) is made by hard material reaches the O type circle of being made by soft material (2) to be formed, and described O type circle (2) is structure as a whole with skeleton ring (1).

2. filtration as claimed in claim 1 is used composite sealing ring with separating, and it is characterized in that: described O type circle (2) is fixed on the outside of described skeleton ring (1).

3. filtration as claimed in claim 1 or 2 is used composite sealing ring with separating, and it is characterized in that: described skeleton ring (1) top is provided with flange (3), and the section of described O type circle (2) is the C type and is fixed on outside the described flange (3).

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