Bag type filter without outer frame

Abstract

The utility model provides a bag filter without an outer frame, which comprises a casing, an air inlet and an air outlet are arranged on the casing, and a plurality of filter bags are arranged in the casing. The filter bag comprises an outer bag, the outer bag is cylindrical, one end of the cylindrical outer bag is a sealed end, the other end of the cylindrical outer bag is an open end, the sealed end faces the air outlet of the machine shell, and the open end faces the air inlet of the machine shell; a plurality of inner barrels are arranged in the outer bag, the side walls of every two adjacent inner barrels are connected, and the inner barrels close to the outer bag are connected with the inner wall of the outer bag. The filter bag in the outer-frame-free bag type filter forms a self-supporting structure through the outer bag and the inner cylinder, so that the outer-frame-free bag type filter is convenient to disassemble and overhaul.

Description

Technical Field

[0001] This utility model relates to a filtration device, specifically, to a frameless bag filter. Background Technology

[0002] Bag filters are a common type of filtration equipment, widely used due to their advantages such as small size, simple and flexible operation, energy saving, high efficiency, closed operation, and strong applicability. Currently, there are many types of bag filter equipment on the market. For example, Chinese patent CN221846290U discloses a multi-bag filter. These bag filters have perforated external cylinders on the outside of the filter bags to support them, preventing severe deformation of the filter bags in the airflow that would affect filtration. The filter bags are fixedly connected to the external cylinders one by one. If the filter bags need to be replaced, the equipment must be disassembled first, then the external cylinders must be disassembled, and finally the filter bags can be removed. Especially if all filter bags need to be replaced, all external cylinders must be disassembled sequentially, making the replacement process very cumbersome.

[0003] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a frameless bag filter.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A frameless bag filter includes a housing with an air inlet and an air outlet. Several filter bags are disposed inside the housing. Each filter bag includes an outer bag, which is cylindrical with one end sealed and the other end open. The sealed end faces the air outlet of the housing, and the open end faces the air inlet. Several inner cylinders are disposed inside the outer bag, with the sidewalls of adjacent inner cylinders connected. The inner cylinder closest to the outer bag is connected to the inner wall of the outer bag.

[0007] Spiral support strips are fixedly installed on the outer wall of the inner cylinder. The spiral support strips are wound around the outer wall of the inner cylinder and are coaxial with the inner cylinder. The outer edge of the spiral support strip is tangent to the outer wall of the adjacent inner cylinder and / or the inner wall of the outer bag and is fixedly connected.

[0008] One inner tube is coaxial with the outer bag and is called the first inner tube. The other inner tubes are evenly distributed around the first inner tube and are called the second inner tubes. The outer wall of each second inner tube is connected to the inner wall of the outer bag, and the outer wall of each second inner tube is connected to the outer wall of the first inner tube. The outer walls of two adjacent second inner tubes are connected.

[0009] The outer end of the inner tube is flush with the open end of the outer bag, and the inner end of the inner tube is sealed to the closed end of the outer bag.

[0010] The front side of the housing is provided with a front sealing plate and a filter plate. The front sealing plate has mounting holes evenly distributed around the filter bag. The open end of the outer bag extends into a connecting cap. The front sealing plate, the connecting cap, and the filter plate are fixedly connected. The filter plate has several ventilation holes evenly distributed around the open end of the outer bag to form an air inlet.

[0011] An air outlet is provided on the rear side of the casing, and a connecting ring plate is provided on the outer edge of the air outlet. Several connecting holes are evenly arranged on the connecting ring plate.

[0012] The casing is rectangular, and both the outer bag and the inner cylinder are cylindrical.

[0013] Compared to existing technologies, the advantages of this invention are as follows: This invention provides a frameless bag filter where the filter bag forms a self-supporting structure through the outer bag and inner cylinder, facilitating disassembly and maintenance. During use, the open end of the outer bag corresponds to the air inlet, allowing airflow to easily enter the filter bag for filtration. The inner cylinder within the outer bag provides support for the filter bag, preventing severe deformation during airflow and ensuring proper filtration. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the filter bag in this utility model.

[0016] Figure 3 This is a cross-sectional structural diagram of the filter bag in this utility model.

[0017] In the diagram: 1. Housing; 2. Air inlet; 3. Air outlet; 4. Filter plate; 5. Outer bag; 6. First inner cylinder; 7. Second inner cylinder; 8. Spiral support bar; 9. Connecting cap. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0020] like Figure 1-3 As shown, a frameless bag filter includes a housing 1 with an air inlet 2 and an air outlet 3. Several filter bags are disposed inside the housing 1. Each filter bag includes an outer bag 5, which is cylindrical with one sealed end and the other open end. The sealed end faces the air outlet 3 of the housing 1, and the open end faces the air inlet 1. Several inner cylinders are disposed inside the outer bag 5, with the sidewalls of adjacent inner cylinders connected. The inner cylinder closest to the outer bag 5 is connected to the inner wall of the outer bag 5. Specifically, the filter bags (outer bag, inner cylinders, and their connecting structures) can be made of common materials such as polypropylene (PP), polyester fiber (PE), nylon mesh (NMO), PTFE (polytetrafluoroethylene), and stainless steel mesh.

[0021] The filter bag in this bag filter has a self-supporting structure formed by the outer bag and the inner cylinder, which facilitates disassembly and maintenance. During use, the open end of the outer bag corresponds to the air inlet, allowing airflow to easily enter the filter bag for filtration. The inner cylinder in the outer bag provides support for the filter bag, preventing it from undergoing severe deformation during airflow and affecting filtration.

[0022] In one embodiment, a spiral support strip 8 is fixedly provided on the outer wall of the inner cylinder. The spiral support strip 8 is wound around the outer wall of the inner cylinder and is coaxial with the inner cylinder. The outer edge of the spiral support strip 8 is tangent to and fixedly connected to the outer wall of the adjacent inner cylinder and / or the inner wall of the outer bag 5. The spiral structure provides support for the inner cylinder. At the same time, the spiral structure connects the inner cylinder to the inner cylinder or the inner cylinder to the outer bag, further providing structural stability. Specifically, the material of the spiral support strip can be the same as that of the inner cylinder and the outer bag.

[0023] In one embodiment, one inner tube is coaxial with the outer bag 5 and is called the first inner tube 6, and the other inner tubes are evenly distributed around the inner tube and are called the second inner tubes 7; the outer wall of each second inner tube 7 is connected to the inner wall of the outer bag 5, the outer wall of each second inner tube 7 is connected to the outer wall of the first inner tube 6, and the outer walls of two adjacent second inner tubes 7 are connected.

[0024] In one embodiment, the outer end of the inner tube is flush with the open end of the outer bag 5, and the inner end of the inner tube is sealed to the closed end of the outer bag 5 to improve the stability of the structure.

[0025] In one embodiment, a front sealing plate and a filter plate 4 are provided on the front side of the housing 1. The front sealing plate has mounting holes evenly distributed on the filter bag. The open end of the outer bag 5 extends out to form a connecting brim 9. The front sealing plate, the connecting brim 9 and the filter plate 4 are fixedly connected. The filter plate 4 has several ventilation holes evenly distributed on the open end of the outer bag 5 to form an air inlet 1. The filter plate plays a filtering role to prevent large debris from entering the filter bag.

[0026] In one embodiment, an air outlet 3 is provided on the rear side of the housing 1, and a connecting ring plate is provided on the outer edge of the air outlet 3. The connecting ring plate is evenly provided with several connecting holes to facilitate filter assembly. Specifically, the connecting ring plate can be installed on the air inlet of other equipment or the exhaust outlet of the factory by bolts. After the airflow enters the filter bag for filtration, it is discharged through the air outlet of the equipment.

[0027] In one embodiment, the housing 1 is a rectangular housing, and the outer bag 5 and the inner cylinder are both cylindrical, which facilitates assembly.

[0028] The above embodiments can be combined with each other.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A frameless bag filter, comprising a housing, an air inlet and an air outlet on the housing, and a plurality of filter bags disposed inside the housing; characterized in that: The filter bag includes an outer bag, which is cylindrical with one end sealed and the other end open. The sealed end faces the air outlet of the housing, and the open end faces the air inlet of the housing. The outer bag contains several inner cylinders, with the side walls of two adjacent inner cylinders connected. The inner cylinder closest to the outer bag is connected to the inner wall of the outer bag.

2. The frameless bag filter according to claim 1, characterized in that: Spiral support strips are fixedly installed on the outer wall of the inner cylinder. The spiral support strips are wound around the outer wall of the inner cylinder and are coaxial with the inner cylinder. The outer edge of the spiral support strip is tangent to the outer wall of the adjacent inner cylinder and / or the inner wall of the outer bag and is fixedly connected.

3. The frameless bag filter according to claim 2, characterized in that: One inner tube is coaxial with the outer bag and is called the first inner tube. The other inner tubes are evenly distributed around the first inner tube and are called the second inner tubes. The outer wall of each second inner tube is connected to the inner wall of the outer bag, and the outer wall of each second inner tube is connected to the outer wall of the first inner tube. The outer walls of two adjacent second inner tubes are connected.

4. The frameless bag filter according to claim 3, characterized in that: The outer end of the inner tube is flush with the open end of the outer bag, and the inner end of the inner tube is sealed to the closed end of the outer bag.

5. The frameless bag filter according to claim 4, characterized in that: The front side of the housing is provided with a front sealing plate and a filter plate. The front sealing plate has mounting holes evenly distributed around the filter bag. The open end of the outer bag extends into a connecting cap. The front sealing plate, the connecting cap, and the filter plate are fixedly connected. The filter plate has several ventilation holes evenly distributed around the open end of the outer bag to form an air inlet.

6. The frameless bag filter according to claim 5, characterized in that: An air outlet is provided on the rear side of the casing, and a connecting ring plate is provided on the outer edge of the air outlet. Several connecting holes are evenly arranged on the connecting ring plate.

7. The frameless bag filter according to claim 6, characterized in that: The casing is rectangular, and both the outer bag and the inner cylinder are cylindrical.

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