PTFE needle felt bag mouth sealing structure
By using a shape memory alloy elastic ring and a high-temperature resistant plastic protective sleeve at the opening of the PTFE needle-punched felt bag, combined with Velcro and a wear-resistant coating, the problem of the elastic ring becoming brittle at high temperatures is solved, achieving a longer-lasting sealing effect and preventing leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SULAIER ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-07-14
AI Technical Summary
The elastic ring of the traditional PTFE needle-punched felt bag opening sealing structure is prone to becoming brittle under high temperature and environmental factors, resulting in a decrease in sealing effect and easy breakage and leakage.
The combination of a flexible ring made of shape memory alloy and a high-temperature resistant plastic protective sleeve, along with Velcro and a wear-resistant coating, is secured by stitching to form a slot structure that enhances the sealing effect.
It effectively prevents the elastic ring from becoming brittle due to high temperature and environmental factors, extends its service life, avoids leakage, and improves sealing performance.
Smart Images
Figure CN224492061U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PTFE needle-punched felt bag opening technology, specifically, to a PTFE needle-punched felt bag opening sealing structure. Background Technology
[0002] PTFE needle-punched felt bag openings are mainly used to connect filter bags to the tube sheet or other components of dust collection equipment, ensuring the stability of the filter bag installation, keeping the filter bag in the correct position during normal operation, preventing the filter bag from falling off or shifting, and effectively preventing dust-laden gas from leaking from the bag opening, thereby ensuring the filtration effect and the operation of the dust collection system.
[0003] The opening of a PTFE needle-punched felt bag is generally composed of a bag tube and two sets of elastic rings. The two sets of elastic rings are sewn together at a certain interval on the inside of one end of the bag tube to form a sealing snap. During installation, the two sets of elastic rings are squeezed to deform them, and then the bag tube is inserted into the tube sheet. The gap between the two sets of elastic rings is then used to fit between the tube sheets to seal the bag.
[0004] Traditional PTFE needle-punched felt bag opening sealing structures use elastic rings to support and seal the PTFE needle-punched felt bag opening. After a period of use, the elastic rings, which are generally made of plastic and composite materials, are prone to corrosion and brittleness due to high temperatures and various factors in the surrounding environment, resulting in cracks. Once cracked, they are prone to breakage and friction against the bag tube, leading to leakage at the connection between the bag tube and the tube sheet. Utility Model Content
[0005] The purpose of this invention is to provide a PTFE needle-punched felt bag opening sealing structure, which solves the problem that in the existing PTFE needle-punched felt bag opening sealing structure, the elastic ring is prone to becoming brittle due to high temperature after long-term use, thus reducing the sealing effect.
[0006] This utility model provides the following technical solution: a PTFE needle-punched felt bag opening sealing structure, including a bag tube, a sealing component inserted into the inner side of the upper end of the bag tube, and the sealing component including an elastic ring inserted into the inner side of the upper end of the bag tube, and a protective sleeve covering the outer side of the elastic ring.
[0007] The above technical solution utilizes an elastic ring and a protective sleeve to support one end of the bag tube.
[0008] As a preferred embodiment of the above technical solution, the protective sleeve is provided with an anti-wear pad on the outside, and a first extension pad is fixedly connected to one end of the anti-wear pad. A second extension pad is fixedly connected to the end of the anti-wear pad away from the first extension pad. A Velcro surface is fixedly connected to the outside of one end of the first extension pad, and a Velcro claw surface is fixedly connected to the outside of one end of the second extension pad.
[0009] The above technical solution allows the anti-abrasion pad and the first extension pad to be fitted onto the outside of the protective sleeve by attaching the hook and loop surfaces of the Velcro.
[0010] As a preferred embodiment of the above technical solution, the anti-wear pad is fixedly connected to both sides with a wear-resistant coating, and the side of the wear-resistant coating away from the anti-wear pad is in contact with the protective sleeve and the bag tube.
[0011] The above technical solution improves the wear resistance of the anti-wear pad by using a wear-resistant coating.
[0012] As a preferred embodiment of the above technical solution, the upper end of the bag tube is bent 180° and then fixed by three sets of stitches.
[0013] The above technical solution utilizes three sets of stitches to sew the bag tube, thereby improving the restriction effect on elastic rings and protective sleeves.
[0014] As a preferred embodiment of the above technical solution, the elastic ring is made of shape memory alloy, and the protective sleeve is made of high-temperature resistant plastic.
[0015] The above technical solution involves making the elastic ring a shape memory alloy, which allows it to be restored by high-temperature heating if the sealing effect deteriorates after the elastic ring changes. The protective sleeve is made of high-temperature resistant plastic, which can protect the elastic ring and reduce the impact of the surrounding environment on it.
[0016] As a preferred embodiment of the above technical solution, the elastic ring, protective sleeve, and anti-abrasion pad are inserted inside the bag tube, and the bag tube is fixed by sewing.
[0017] The above technical solution uses stitching to fix the elastic ring, protective sleeve, and anti-wear pad, improving the ease of installation.
[0018] As a preferred embodiment of the above technical solution, the spacing between the two sets of elastic rings, protective sleeves and anti-wear pads forms a groove.
[0019] The above technical solution uses the spacing between two sets of elastic rings, protective sleeves, and anti-wear pads to snap the tube sheet together.
[0020] Compared with the prior art, the beneficial effects of this utility model are:
[0021] This PTFE needle-punched felt bag opening sealing structure can reduce the impact of high temperature and various environmental factors through sealing components, effectively extend service life, avoid leakage caused by the breakage of elastic components, and thus improve the sealing effect. Attached Figure Description
[0022] Figure 1 A schematic diagram of a three-dimensional structure for sealing the mouth of a PTFE needle-punched felt bag.
[0023] Figure 2 This is a schematic cross-sectional view of a PTFE needle-punched felt bag opening sealing structure.
[0024] Figure 3 This is a magnified schematic diagram of a partial cross-sectional structure of the wear-resistant coating at the opening sealing structure of a PTFE needle-punched felt bag;
[0025] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;
[0026] Figure 5 This is an enlarged schematic diagram of the unfolded structure of a PTFE needle-punched felt bag opening sealing structure anti-wear pad.
[0027] In the diagram: 1. Bag tube; 2. Sealing assembly; 21. Elastic ring; 22. Protective sleeve; 23. Anti-abrasion pad; 24. First extension pad; 25. Second extension pad; 26. Velcro loop side; 27. Velcro claw side; 28. Abrasion-resistant coating; 29. Stitching. Detailed Implementation
[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0029] like Figure 1 - Figure 5 As shown, this utility model provides a technical solution: a PTFE needle-punched felt bag opening sealing structure, including a bag tube 1, a sealing component 2 inserted into the inner side of the upper end of the bag tube 1, and the sealing component 2 including an elastic ring 21 inserted into the inner side of the upper end of the bag tube 1, and a protective sleeve 22 sleeved on the outer side of the elastic ring 21. The sealing component 2 can reduce the impact of corrosion caused by high temperature and various factors in the surrounding environment, effectively extend the service life, avoid leakage caused by the breakage of the elastic component, and thus improve the sealing effect.
[0030] like Figure 4 and Figure 5 As shown, the protective sleeve 22 is covered with an anti-abrasion pad 23, and one end of the anti-abrasion pad 23 is fixedly connected to a first extension pad 24. The end of the anti-abrasion pad 23 away from the first extension pad 24 is fixedly connected to a second extension pad 25. The outer side of one end of the first extension pad 24 is fixedly connected to a hook and loop fastener 26, and the outer side of one end of the second extension pad 25 is fixedly connected to a hook and loop fastener claw 27. The hook and loop fastener 26 and the hook and loop fastener claw 27 are used to drive the first extension pad 24 and the second extension pad 25 to make the anti-abrasion pad 23 wrap and fix the protective sleeve 22.
[0031] like Figure 5As shown, wear-resistant coatings 28 are fixedly connected to both sides of the anti-wear pad 23, and the side of the wear-resistant coating 28 away from the anti-wear pad 23 is in contact with the protective sleeve 22 and the bag tube 1. The wear-resistant coatings 28 on both sides of the anti-wear pad 23 protect the bag tube 1 and the anti-wear pad 23.
[0032] It should be noted that the wear-resistant coating 28 is a polyurethane coating.
[0033] like Figure 4 As shown, the upper end of the bag tube 1 is bent 180° and then sewn and fixed by three sets of stitches 29. The three sets of stitches 29 are used to stabilize and restrict the elastic ring 21, protective sleeve 22 and other components.
[0034] like Figure 3 and Figure 4 As shown, the elastic ring 21 is made of shape memory alloy and the protective sleeve 22 is made of high temperature resistant plastic. The elastic ring 21 and the protective sleeve 22 can support the bag opening of the bag tube 1. The elastic ring 21 can be restored to its original shape by heating.
[0035] It should be noted that the elastic ring 21 is made of tin-titanium alloy, and the protective sleeve 22 is made of polyetheretherketone (PEEK) composite material.
[0036] like Figure 4 As shown, the elastic ring 21, protective sleeve 22, and anti-abrasion pad 23 are inserted inside the bag tube 1, and the bag tube 1 is fixed by sewing.
[0037] like Figure 4 As shown, the gap between the two sets of elastic rings 21, protective sleeves 22 and anti-wear pads 23 forms a groove, which is used to lock the flower ring in place.
[0038] Working principle: When using PTFE needle-punched felt for the bag opening, first, the anti-abrasion pad 23 is looped around the outside of the protective sleeve 22. Then, the hook and loop fasteners 26 and 27 are used to pull the first extension pad 24 and the second extension pad 25 to wrap and fix the anti-abrasion pad 23 around the protective sleeve 22. Next, the anti-abrasion pad 23 and the protective sleeve 22 are placed inside one end of the bag tube 1. Then, one end of the bag tube 1 is folded over to wrap the protective sleeve 22 and the anti-abrasion pad 23 inside. After wrapping... The protective sleeve 22 and the anti-abrasion pad 23 are restricted by sewing through the stitch 29. In subsequent use, the anti-abrasion pad 23 and the protective sleeve 22 are deformed by pressing them. Then, one end of the bag tube 1 is inserted into the wreath, and the two sets of elastic rings 21 and the protective sleeve 22 are put on the outside of the wreath. At this time, the pressed elastic rings 21 and the protective sleeve 22 are released, and the elastic rings 21 recover their elastic memory, so that the bag tube 1 and the wreath are snapped together.
[0039] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A PTFE needle-punched felt bag opening sealing structure, comprising a bag tube (1), characterized in that: A sealing component (2) is inserted into the inner side of the upper end of the bag tube (1), and the sealing component (2) includes an elastic ring (21) inserted into the inner side of the upper end of the bag tube (1), and a protective sleeve (22) is fitted on the outer side of the elastic ring (21).
2. The PTFE needle-punched felt bag opening sealing structure according to claim 1, characterized in that: The protective sleeve (22) is fitted with an anti-wear pad (23) on the outside, and a first extension pad (24) is fixedly connected to one end of the anti-wear pad (23). A second extension pad (25) is fixedly connected to the end of the anti-wear pad (23) away from the first extension pad (24). A hook and loop fastener (26) is fixedly connected to the outside of one end of the first extension pad (24), and a hook and loop fastener claw (27) is fixedly connected to the outside of one end of the second extension pad (25).
3. The PTFE needle-punched felt bag opening sealing structure according to claim 2, characterized in that: The anti-wear pad (23) has a wear-resistant coating (28) fixedly connected to both sides, and the side of the wear-resistant coating (28) away from the anti-wear pad (23) is in contact with the protective sleeve (22) and the bag tube (1).
4. The PTFE needle-punched felt bag opening sealing structure according to claim 1, characterized in that: The upper end of the bag tube (1) is bent 180° and then sewn and fixed by three sets of stitches (29).
5. The PTFE needle-punched felt bag opening sealing structure according to claim 1, characterized in that: The elastic ring (21) is made of shape memory alloy, and the protective sleeve (22) is made of high temperature resistant plastic.
6. The PTFE needle-punched felt bag opening sealing structure according to claim 2, characterized in that: The elastic ring (21), protective sleeve (22) and anti-abrasion pad (23) are inserted inside the bag tube (1), and the bag tube (1) is fixed by sewing.
7. The PTFE needle-punched felt bag opening sealing structure according to claim 6, characterized in that: The gap between the two sets of elastic rings (21), protective sleeves (22) and anti-wear pads (23) forms a groove.