High-temperature-resistant PTFE filter bag
By using a sleeve and positioning column structure and a multi-layer filter bag design, the problem of PTFE filter bags easily shifting and falling off on the cage is solved, achieving a stable connection and efficient filtration effect, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI GUOJU HIGH TEMPERATURE MATERIALS CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, PTFE filter bags are directly fitted onto the outer surface of the cage frame, which is prone to displacement or detachment due to external forces. Furthermore, friction accelerates wear during the dust removal process, and the connection is unstable.
The filter bag and cage are fixed by connecting plates and bolts using a sleeve and positioning column structure. The multi-layer structure design, which combines a base fabric layer, a coating layer, a heat-resistant layer, a filter layer, a membrane layer and a water- and oil-repellent layer, enhances the connection stability and high-temperature resistance.
It improves the connection stability between the filter bag and the cage, reduces the risk of detachment, enhances high temperature resistance and filtration accuracy, extends service life, and ensures normal operation in high temperature environments.
Smart Images
Figure CN224220980U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PTFE filter bag technology, and in particular to a high-temperature resistant PTFE filter bag. Background Technology
[0002] High-temperature resistant PTFE (polytetrafluoroethylene) filter bags are a type of filtration material used in high-temperature environments. Due to their excellent high-temperature resistance, chemical stability, corrosion resistance, and aging resistance, PTFE filter bags are widely used in industrial applications requiring high-temperature filtration, especially in situations involving corrosive gases, dust, or other pollutants.
[0003] Currently, PTFE filter bags are widely used in various dust removal systems in industrial dust removal equipment. They are typically installed by directly mounting them onto the outer surface of the cage. While this traditional installation method seems simple, it has many drawbacks. During actual operation, on the one hand, the dust-laden airflow exerts a significant impact force on the filter bag. The pulsation and fluctuation of the airflow cause the filter bag to be constantly subjected to periodic external force. When this external force exceeds the friction or fixing force between the filter bag and the cage, the filter bag is prone to displacement. On the other hand, during the cleaning process, the instantaneous force generated by pulse jet cleaning or mechanical vibration causes the filter bag to shake and rub violently on the cage surface. Frequent shaking and friction not only accelerate the wear of the filter bag but also gradually weaken the fit between the filter bag and the cage. Utility Model Content
[0004] The purpose of this invention is to solve the problem that in the existing technology, the filter bag is directly fitted onto the outer surface of the cage. This traditional installation method seems simple, but once the external force exceeds the friction or fixing force between the filter bag and the cage, the filter bag is prone to displacement or falling off.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a high-temperature resistant PTFE filter bag, comprising a filter bag body, wherein a sleeve is provided on the left outer surface of the filter bag body, and further comprising:
[0006] A cage frame is movably embedded in the inner surface of the filter bag body, and a connector is fixedly installed on the left side of the cage frame;
[0007] A connecting groove is formed inside the connector, the sleeve is movably embedded inside the connector, and positioning grooves are formed on both sides of the connector's interior.
[0008] Two positioning posts are fixedly installed on the outer surface of the sleeve, and both positioning posts are matched with the positioning groove.
[0009] In a preferred embodiment, two connecting plates are fixedly installed on both sides of the connector, and the four connecting plates are divided into two groups of two.
[0010] The technical effect of adopting the above-mentioned further solution is that the sleeve and the connector can be fixed by the connecting plate.
[0011] In a preferred embodiment, both sets of connecting plates are internally threaded with bolts, and both positioning pins are movably connected to the inner side of the connecting plates.
[0012] The technical effect of adopting the above-mentioned further solution is that it allows the positioning column to move inside the connecting plate.
[0013] In a preferred embodiment, both positioning posts have threaded grooves inside, and both bolts are matched with the threaded grooves.
[0014] The technical effect of adopting the above-mentioned further solution is that the bolt can be embedded into the threaded groove.
[0015] In a preferred embodiment, the filter bag body has a base fabric layer inside, and a coating layer is provided on top of the base fabric layer.
[0016] The technical effect of adopting the above-mentioned further solution is that the base fabric layer is made of polyester fiber, which has high strength and good flexibility, and can provide a stable support structure for the filter bag.
[0017] In a preferred embodiment, a heat-resistant layer is provided at the bottom of the base fabric layer, and a filter layer is provided at the bottom of the heat-resistant layer.
[0018] The technical effect of adopting the above-mentioned further solution is that the ceramic fiber heat-resistant layer has excellent high temperature resistance and low thermal conductivity, which can effectively block the thermal shock of high temperature gas to other layers. Placing it at the bottom of the base fabric layer can protect the base fabric layer and other functional layers from high temperature damage.
[0019] In a preferred embodiment, a membrane layer is provided at the bottom of the filter layer.
[0020] The technical effect of adopting the above-mentioned further solution is that the membrane layer further refines the filtration pore size of the filter bag, improves the filtration accuracy of the filter bag, and makes the emitted gas cleaner.
[0021] In a preferred embodiment, a water- and oil-repellent layer is provided at the bottom of the coating layer.
[0022] The technical effect of adopting the above-mentioned further solution is that the water-repellent and oil-repellent layer can effectively prevent water vapor and oil mist from adhering to and penetrating the surface of the filter bag body, prevent the filter bag from being blocked due to moisture or oil, and maintain the air permeability and filtration performance of the filter bag.
[0023] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0024] This invention, through the design of the sleeve and positioning column structure, not only facilitates the assembly of the cage frame and filter bag body by personnel, reducing the professional skill requirements for installers and improving the efficiency of installation work, saving time and effort, but also makes the connection between the filter bag body and the cage frame more stable, effectively resisting the impact of dust-laden airflow and vibration during the dust removal process, reducing the risk of the filter bag body falling off the cage frame. It solves the problem in the existing technology where the filter bag is directly sleeved on the outer surface of the cage frame. This traditional installation method seems simple, but once the external force exceeds the friction or fixing force between the filter bag and the cage frame, the filter bag is prone to displacement or falling off. Attached Figure Description
[0025] Figure 1 A rear-view three-dimensional structural diagram of a high-temperature resistant PTFE filter bag provided by this utility model;
[0026] Figure 2 A cross-sectional perspective view of the three-dimensional structure of the connector for a high-temperature resistant PTFE filter bag provided by this utility model;
[0027] Figure 3 A cross-sectional perspective view of the three-dimensional structure of a high-temperature resistant PTFE filter bag provided by this utility model. Figure 1 ;
[0028] Figure 4 A partial three-dimensional structural diagram of a high-temperature resistant PTFE filter bag provided by this utility model;
[0029] Figure 5 A cross-sectional perspective view of the three-dimensional structure of a high-temperature resistant PTFE filter bag provided by this utility model. Figure 2 .
[0030] Legend:
[0031] 1. Filter bag body; 101. Sleeve; 102. Cage frame; 103. Connector; 104. Connecting groove; 105. Positioning post; 106. Positioning groove; 107. Connecting plate; 108. Bolt; 109. Threaded groove; 2. Base fabric layer; 201. Coating layer; 202. Heat-resistant layer; 203. Filter layer; 204. Membrane layer; 205. Water-repellent and oil-repellent layer. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Example 1, please refer to Figures 1 to 5 This utility model provides a technical solution: a high-temperature resistant PTFE filter bag, including a filter bag body 1, a sleeve 101 provided on the left outer surface of the filter bag body 1, and further including: a cage frame 102, movably embedded in the inner surface of the filter bag body 1, a connector 103 fixedly installed on the left side of the cage frame 102; a connecting groove 104, formed inside the connector 103, the sleeve 101 movably embedded inside the connector 103, and positioning grooves 106 formed on both sides of the inside of the connector 103; and two positioning posts. 105, both of which are fixedly installed on the outer surface of the sleeve 101. Both positioning pins 105 are matched with positioning grooves 106. Two connecting plates 107 are fixedly installed on both sides of the connector 103. The four connecting plates 107 are divided into two groups of two. The interior of each of the two groups of connecting plates 107 is threaded with bolts 108. Both positioning pins 105 are movably connected to the inner side of the connecting plates 107. Both positioning pins 105 have threaded grooves 109 inside. Both bolts 108 are matched with threaded grooves 109.
[0034] In this embodiment, personnel can first pick up the filter bag body 1 and place it on the outer surface of the cage frame 102, so that the left side of the filter bag body 1 and the sleeve 101 enter the connecting groove 104 inside the connector 103, and at the same time drive the positioning post 105 to be embedded in the positioning groove 106. Then, personnel can rotate the bolt 108 in the connecting plate 107 so that it can be embedded in the threaded groove 109 to fix the filter bag body 1 and the cage frame 102. The structure of the sleeve 101 and the positioning post 105 not only facilitates the assembly of the cage frame 102 and the filter bag body 1, but also reduces the professional skills required of the installation personnel, improves the efficiency of the installation work, saves time and effort, and makes the connection between the filter bag body 1 and the cage frame 102 more stable, which can effectively resist the impact of dust-laden airflow, vibration during the dust removal process and other external forces, reducing the risk of the filter bag body 1 falling off the cage frame 102.
[0035] Example 2, as Figures 1 to 5 As shown, the filter bag body 1 has a base fabric layer 2 inside, a coating layer 201 on the top of the base fabric layer 2, a heat-resistant layer 202 on the bottom of the base fabric layer 2, a filter layer 203 on the bottom of the heat-resistant layer 202, a membrane layer 204 on the bottom of the filter layer 203, and a water-repellent and oil-repellent layer 205 on the bottom of the membrane layer 204.
[0036] In this embodiment, a layer of PTFE emulsion is first coated onto a polyester fiber base fabric layer 2 to form a coating layer 201. A heat-resistant layer 202 made of ceramic fiber is then placed at the bottom of the base fabric layer 2. Simultaneously, a PTFE fiber filter layer 203 is placed at the bottom of the heat-resistant layer 202. Then, a PTFE film is placed at the bottom of the filter layer 203 to form a membrane layer 204. Finally, a water- and oil-repellent layer 205 made of polytetrafluoroethylene is placed at the bottom of the coating layer 201 to form the filter bag body 1. The base fabric layer 2, made of polyester fiber, possesses high strength and good flexibility, providing a stable support structure for the filter bag. Coating with PTFE emulsion to form the coating layer 201 further enhances the stability and corrosion resistance of the base fabric layer 2, enabling it to be used in harsh chemical environments and extending the overall service life of the filter bag. The ceramic fiber provides heat resistance... Layer 202 possesses excellent high-temperature resistance and low thermal conductivity, effectively blocking the thermal shock of high-temperature gases to other layers. Its placement at the bottom of the base fabric layer 2 protects the base fabric layer 2 and other functional layers from high-temperature damage, ensuring the filter bag continues to function normally in high-temperature environments. The PTFE fiber filter layer 203 has a uniform pore structure and good filtration performance, enabling efficient interception and collection of dust particles of different sizes. It effectively removes fine particles from exhaust gas, ensuring the filtered gas achieves a high level of cleanliness and meets environmental protection requirements. The PTFE membrane coating layer 204 further refines the filter bag's pore size, improving filtration accuracy and resulting in cleaner exhaust gas. The polytetrafluoroethylene water- and oil-repellent layer 205 effectively prevents the adhesion and penetration of water vapor and oil mist on the surface of the filter bag body 1, preventing clogging due to moisture or oil contamination and maintaining the filter bag's air permeability and filtration performance.
[0037] Working principle: In use, the operator can first pick up the filter bag body 1 and put it on the outer surface of the cage frame 102, so that the left side of the filter bag body 1 and the sleeve 101 enter the connecting groove 104 inside the connector 103, and at the same time drive the positioning post 105 to be embedded in the positioning groove 106. Then, the operator rotates the bolt 108 in the connecting plate 107 so that it can be embedded in the threaded groove 109 to fix the filter bag body 1 and the cage frame 102. The structure of the sleeve 101 and the positioning post 105 not only makes it easier for the operator to assemble the cage frame 102 and the filter bag body 1, but also reduces the professional skills required for the installer, improves the efficiency of the installation work, saves time and effort, and makes the connection between the filter bag body 1 and the cage frame 102 more stable. It can effectively resist the impact of dust-laden airflow, vibration during the dust removal process and other external forces, reducing the risk of the filter bag body 1 falling off the cage frame 102. In use, the operator first coats a layer of PTFE emulsion onto a polyester fiber base fabric layer 2 to form a coating layer 201. Then, a heat-resistant layer 202 made of ceramic fiber is placed at the bottom of the base fabric layer 2. Simultaneously, a filter layer 203 made of PTFE fiber is placed at the bottom of the heat-resistant layer 202. Next, a PTFE film is placed at the bottom of the filter layer 203 to form a membrane layer 204. Finally, a water- and oil-repellent layer 205 made of polytetrafluoroethylene is placed at the bottom of the coating layer 201 to form the filter bag body 1. The base fabric layer 2, made of polyester fiber, possesses high strength and good flexibility, providing a stable support structure for the filter bag. The coating layer 201, formed by applying the PTFE emulsion, further enhances the stability and corrosion resistance of the base fabric layer 2, enabling it to be used in harsh chemical environments and extending the overall service life of the filter bag. The ceramic fiber heat-resistant layer... 202 has excellent high-temperature resistance and low thermal conductivity, effectively blocking the thermal shock of high-temperature gases to other layers. Its placement at the bottom of the base fabric layer 2 protects the base fabric layer 2 and other functional layers from high-temperature damage, ensuring the filter bag can still function normally in high-temperature environments. The PTFE fiber filter layer 203 has a uniform pore structure and good filtration performance, enabling efficient interception and collection of dust particles of different sizes. It effectively removes fine particles from exhaust gas, ensuring the filtered gas achieves a high level of cleanliness and meets environmental protection requirements. The PTFE membrane coating layer 204 further refines the filter bag's pore size, improving the filter bag's filtration accuracy and making the emitted gas cleaner. The polytetrafluoroethylene water- and oil-repellent layer 205 effectively prevents water vapor and oil mist from adhering to and penetrating the surface of the filter bag body 1, preventing the filter bag from becoming clogged due to moisture or oil, and maintaining the filter bag's air permeability and filtration performance.
[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A high-temperature resistant PTFE filter bag, comprising a filter bag body (1), wherein a sleeve (101) is provided on the left outer surface of the filter bag body (1), characterized in that, Also includes: A cage frame (102) is movably embedded in the inner surface of the filter bag body (1), and a connector (103) is fixedly installed on the left side of the cage frame (102); A connecting groove (104) is formed inside the connector (103), and the sleeve (101) is movably embedded inside the connector (103). Positioning grooves (106) are formed on both sides of the inside of the connector (103). Two positioning posts (105) are fixedly installed on the outer surface of the sleeve (101), and both positioning posts (105) are matched with the positioning groove (106).
2. The high-temperature resistant PTFE filter bag according to claim 1, characterized in that: Two connecting plates (107) are fixedly installed on both sides of the connector (103), and the four connecting plates (107) are divided into two groups of two.
3. The high-temperature resistant PTFE filter bag according to claim 2, characterized in that: Both sets of connecting plates (107) are threaded with bolts (108), and both positioning pins (105) are movably connected to the inner side of the connecting plates (107).
4. The high-temperature resistant PTFE filter bag according to claim 3, characterized in that: Both positioning posts (105) have threaded grooves (109) inside, and both bolts (108) are matched with the threaded grooves (109).
5. The high-temperature resistant PTFE filter bag according to claim 1, characterized in that: The filter bag body (1) has a base fabric layer (2) inside, and a coating layer (201) is provided on the top of the base fabric layer (2).
6. The high-temperature resistant PTFE filter bag according to claim 5, characterized in that: The bottom of the base fabric layer (2) is provided with a heat-resistant layer (202), and the bottom of the heat-resistant layer (202) is provided with a filter layer (203).
7. A high-temperature resistant PTFE filter bag according to claim 6, characterized in that: The bottom of the filter layer (203) is provided with a membrane layer (204).
8. The high-temperature resistant PTFE filter bag according to claim 7, characterized in that: The bottom of the coating layer (204) is provided with a water-repellent and oil-repellent layer (205).