PTFE (Polytetrafluoroethylene) coated needled felt filter bag for chemical dust removal

Abstract

The utility model discloses a PTFE (Polytetrafluoroethylene) film-coated needled felt filter bag for chemical dust removal, which comprises a filter bag body and a keel, a limiting piston ring is arranged at the top of the filter bag body, a pressing flange is arranged at the top of the keel, the PTFE film-coated needled felt filter bag further comprises a limiting sleeve, the limiting sleeve is sleeved at the top end of the filter bag body, and a first limiting groove matched with the limiting piston ring is arranged on the limiting sleeve. A second limiting groove matched with the limiting piston ring is formed in the bottom end of the pressing flange, a locking column is screwed on the limiting sleeve in a threaded mode, a mounting hole is formed in the pressing flange, the locking column penetrates through the mounting hole and extends upwards to be provided with a locking nut in a threaded mode, and a limiting structure is arranged between the locking column and the pressing flange; the filter bag body comprises a first needled felt layer, a second needled felt layer, an anti-stretching layer and a first PTFE layer which are matched with one another, a second PTFE layer is arranged on the inner side of the second needled felt layer, the filter bag body is good in mounting stability, convenient to mount and dismount and good in filtering effect.

Description

Technical Field

[0001] The utility model relates to the technical field of PTFE coated needle-punched felt filter bags, and more specifically, to a PTFE coated needle-punched felt filter bag for chemical dust removal. Background Art

[0002] PTFE composite filter material is a polymer filter material that can improve the surface filtration effect of needle felt filter bags and reduce the situation where dust enters the interior of needle felt filter bags and affects filtration.

[0003] The existing PTFE coated needle felt filter bag is mainly limited by the expansion ring structure at the top during installation. The PTFE coated needle felt filter bag is installed at the position of the external flower plate opening by its own gravity, and the interior is supported by the keel.

[0004] However, in this way, the PTFE coated needle felt filter bag is prone to shaking when blown by wind, and the connection sealing between the filter bag body and the flower plate opening is poor;

[0005] In addition, the top of the filter bag is mainly limited by an expansion ring structure, wherein the expansion ring structure has the property of being bendable and deformable, which may easily cause the PTFE coated needle felt filter bag to fall off accidentally during use. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the utility model provides a PTFE coated needle felt filter bag for chemical dust removal to solve the technical problems mentioned in the background technology that the PTFE coated needle felt filter bag in the prior art has poor stability and sealing during installation and is prone to accidental falling off.

[0008] (II) Technical solution

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A PTFE coated needle felt filter bag for chemical dust removal, comprising a filter bag body, a limit expansion ring is arranged on the top of the filter bag body, a keel is arranged inside the filter bag body, and a clamping flange is arranged on the top of the keel;

[0011] It also includes a limiting sleeve, which is arranged on the top of the filter bag body, and a first limiting groove is formed on the limiting sleeve to cooperate with the limiting expansion ring, and a second limiting groove is formed on the bottom end of the clamping flange to cooperate with the limiting expansion ring;

[0012] The limiting sleeve is threaded with a locking column, the clamping flange is provided with a mounting hole, the locking column passes through the mounting hole and extends upwards to be threaded with a locking nut, and a limiting structure is provided between the locking column and the clamping flange;

[0013] The filter bag body comprises a first needle punched felt layer and a second needle punched felt layer, an anti-stretching layer is arranged between the first needle punched felt layer and the second needle punched felt layer, a first PTFE layer is arranged on the outer side of the first needle punched felt layer, and a second PTFE layer is arranged on the inner side of the second needle punched felt layer.

[0014] The utility model is further configured such that wear-resistant strips are arranged on the inner wall of the filter bag body in coordination with the keel, and fixing clamps are evenly arranged on the wear-resistant strips. The fixing clamps can improve the connection stability between the filter bag body and the keel, and reduce the mutual collision and wear between the filter bag body and the keel. The provision of the wear-resistant strips can improve the wear-resistant effect between the inside of the filter bag body and the keel.

[0015] The utility model is further configured such that the keel includes a lower fixing ring arranged below the clamping flange, a connecting column is arranged between the lower fixing ring and the clamping flange, a plurality of connecting rings are longitudinally distributed on the connecting column, and stable support of the filter bag body can be achieved through the arrangement of the connecting column, the connecting ring and the lower fixing ring.

[0016] The utility model is further configured such that the anti-stretching layer includes a P84 fiber layer arranged on the inner side of the first needle-punched felt layer, a PPS fiber layer is arranged on the inner side of the P84 fiber layer, and a glass fiber layer is arranged on the inner side of the PPS fiber layer, and the anti-stretching effect of the filter bag body can be achieved through the cooperation among the P84 fiber layer, the PPS fiber layer and the glass fiber layer.

[0017] The utility model is further configured that a high temperature resistant layer is provided between the glass fiber layer and the second needle felt layer to enhance the high temperature resistant effect of the filter bag body.

[0018] The utility model is further configured such that the limiting structure includes a limiting block arranged on the locking column, and a limiting groove is cooperatively provided on the clamping flange, and the connection stability between the locking column and the limiting sleeve can be improved through the cooperation of the limiting block and the limiting groove.

[0019] The utility model is further configured as follows: the limit sleeve includes a limit vertical sleeve, the limit vertical sleeve is arranged on the outside of the filter bag body, a limit horizontal plate is integrally arranged above the limit vertical sleeve, and a limit installation edge is arranged on the limit vertical sleeve. Through the cooperation of the limit vertical sleeve, the limit horizontal plate and the limit installation edge, the limit sleeve can be stably installed at the outer flower plate mouth position.

[0020] The utility model is further configured that a protective pad is provided on one side of the limiting vertical sleeve and the limiting horizontal sleeve close to the filter bag body to reduce friction between the limiting sleeve and the filter bag body.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the utility model provides a PTFE coated needle felt filter bag for chemical dust removal, which has the following beneficial effects:

[0023] 1. The utility model includes a limiting sleeve, which is arranged on the top of the filter bag body. The limiting sleeve is provided with a first limiting groove in cooperation with the limiting expansion ring, and the bottom end of the clamping flange is provided with a second limiting groove in cooperation with the limiting expansion ring. When the filter bag body is installed, the limiting expansion ring on the filter bag body is located between the first limiting groove and the second limiting groove. By locking the clamping flange and the limiting sleeve, the installation stability of the filter bag body can be improved and the accidental falling off of the filter bag body can be reduced.

[0024] 2. The utility model has a locking column screwed on a limiting sleeve, a mounting hole is provided on the clamping flange, the locking column passes through the mounting hole and extends upward to be threaded with a locking nut, and a limiting structure is provided between the locking column and the clamping flange. The locking column is first screwed on the limiting sleeve, and then the clamping flange is sleeved on the locking column through the mounting hole and is locked and fixed by the locking nut. In this way, the clamping flange can be stably installed on the limiting sleeve, thereby improving the stable installation between the keel and the limiting sleeve and improving the supporting stability of the keel on the filter bag body.

[0025] 3. In the utility model, the filter bag body includes a first needle punched felt layer and a second needle punched felt layer, an anti-stretching layer is arranged between the first needle punched felt layer and the second needle punched felt layer, a first PTFE layer is arranged on the outer side of the first needle punched felt layer, and a second PTFE layer is arranged on the inner side of the second needle punched felt layer. The arrangement of the first needle punched felt layer, the second needle punched felt layer, the first PTFE layer, the second PTFE layer and the anti-stretching layer can enhance the filtering and wear-resistant and impact-resistant effects of the filter bag body, thereby improving the filtering performance of the filter bag body.

[0026] 4. The utility model has wear-resistant strips arranged on the inner wall of the filter bag body in cooperation with the keel, and fixed clamps are evenly arranged on the wear-resistant strips. In this way, after the keel is placed inside the filter bag body, the position of the wear-resistant strips corresponds to the structure of the keel, thereby reducing the direct wear of the keel on the inner wall of the filter bag body and improving the performance of the filter bag body. At the same time, by fixing the fixed clamp on the keel, the connection stability between the keel and the filter bag body can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a PTFE coated needle felt filter bag for chemical dust removal in the utility model;

[0028] Figure 2 It is a schematic diagram of the overall structure decomposition of the utility model;

[0029] Figure 3 It is a cross-sectional schematic diagram of the overall internal structure of the utility model;

[0030] Figure 4 It is a schematic cross-sectional view of the local structure of the filter bag body in the utility model;

[0031] Figure 5 It is a schematic cross-sectional view of the overall structure of the limit sleeve in the utility model;

[0032] Figure 6 It is a schematic cross-sectional view of the overall structure of the clamping flange in the utility model.

[0033] In the figure: 1. filter bag body; 2. limiting expansion ring; 3. keel; 4. clamping flange; 5. limiting sleeve; 6. first limiting groove; 7. second limiting groove; 8. locking column; 9. mounting hole; 10. locking nut; 11. first needle felt layer; 12. second needle felt layer; 13. tensile layer; 14. first PTFE layer; 15. second PTFE layer; 16. wear-resistant strip; 17. fixing clamp; 18. lower fixing ring; 19. connecting column; 20. connecting ring; 21. P84 fiber; 22. PPS fiber layer; 23. glass fiber layer; 24. high temperature resistant layer; 25. limiting block; 26. limiting groove; 27. limiting vertical sleeve; 28. limiting horizontal plate; 29. ​​limiting mounting edge; 30. protective pad. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0036] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0037] See also Figure 1-6A PTFE coated needle felt filter bag for chemical dust removal comprises a filter bag body 1, a limited expansion ring 2 is arranged on the top of the filter bag body 1, a keel 3 is arranged inside the filter bag body 1, and a clamping flange 4 is arranged on the top of the keel 3;

[0038] The filter bag body 1 further comprises a limiting sleeve 5, which is sleeved on the top of the filter bag body 1. The limiting sleeve 5 is provided with a first limiting groove 6 to cooperate with the limiting expansion ring 2. The bottom end of the clamping flange 4 is provided with a second limiting groove 7 to cooperate with the limiting expansion ring 2. When the filter bag body 1 is installed, the limiting expansion ring 2 on the filter bag body 1 is located between the first limiting groove 6 and the second limiting groove 7. By locking the clamping flange 4 and the limiting sleeve 5, the installation stability of the filter bag body 1 can be improved, and the accidental falling off of the filter bag body 1 can be reduced.

[0039] The utility model has a locking column 8 threadedly screwed on the limiting sleeve 5, and a mounting hole 9 is opened on the clamping flange 4. The locking column 8 passes through the mounting hole 9 and extends upwardly to be threadedly provided with a locking nut 10, and a limiting structure is arranged between the locking column 8 and the clamping flange 4. The locking column 8 is first screwed on the limiting sleeve 5, and then the clamping flange 4 is sleeved on the locking column 8 through the mounting hole 9, and is locked and fixed by the locking nut 10, so that the stable installation of the clamping flange 4 on the limiting sleeve 5 can be achieved, thereby improving the stable installation between the keel 3 and the limiting sleeve 5, and improving the supporting stability of the keel 3 on the filter bag body 1

[0040] In the utility model, the filter bag body 1 includes a first needle punched felt layer 11 and a second needle punched felt layer 12, an anti-stretching layer 13 is arranged between the first needle punched felt layer 11 and the second needle punched felt layer 12, a first PTFE layer 14 is arranged on the outer side of the first needle punched felt layer 11, and a second PTFE layer 15 is arranged on the inner side of the second needle punched felt layer 12. The arrangement of the first needle punched felt layer 11, the second needle punched felt layer 12, the first PTFE layer 14, the second PTFE layer 15 and the anti-stretching layer 13 can enhance the filtering and wear-resistant and impact-resistant effects of the filter bag body 1, and improve the filtering performance of the filter bag body 1.

[0041] In the utility model, wear-resistant strips 16 are arranged on the inner wall of the filter bag body 1 in cooperation with the keel 3 , and fixing clamp rings 17 are evenly arranged on the wear-resistant strips 16 .

[0042] In this way, after the keel 3 is placed inside the filter bag body 1, the position of the wear-resistant strip 16 corresponds to the structure of the keel 3, thereby reducing the direct wear of the keel 3 on the inner wall of the filter bag body 1 and improving the performance of the filter bag body 1. At the same time, by fixing the fixing clamp 17 on the keel 3, the connection stability between the keel 3 and the filter bag body 1 can be improved.

[0043] See also Figure 1-Figure 6As an implementation of the keel 3: the keel 3 includes a lower fixing ring 18 arranged below the clamping flange 4, a connecting column 19 is arranged between the lower fixing ring 18 and the clamping flange 4, and a plurality of connecting rings 20 are longitudinally distributed on the connecting column 19. Through the cooperation of the clamping flange 4, the lower fixing ring 18, the connecting column 19 and the connecting ring 20, stable support inside the filter bag body 1 can be achieved, wherein the fixing clamping ring 17 is clamped and fixed on the corresponding lower fixing ring 18, the connecting column 19 or the connecting ring 20 after the keel 3 enters the interior of the filter bag body 1.

[0044] See also Figure 1-Figure 6 As an implementation of the anti-stretching layer 13: the anti-stretching layer 13 includes a P84 fiber 21 layer arranged on the inner side of the first needle-punched felt layer 11, the P84 fiber 21 layer is formed by needle-punching the P84 fiber 21 filaments, a PPS fiber layer 22 is arranged on the inner side of the P84 fiber 21 layer, the PPS fiber layer 22 is formed by the PPS fiber filament needle-punching technology, a glass fiber layer 23 is arranged on the inner side of the PPS fiber layer 22, and the glass fiber layer 23 is formed by needle-punching the glass fiber filaments.

[0045] Specifically, P84 fiber 21 filaments, PPS fiber filaments and glass fiber filaments all have good tensile strength, which can improve the tensile strength of the filter bag itself, reduce the damage of the filter bag caused by external factors, and improve the use range of the filter bag.

[0046] See also Figure 1-Figure 6 As an implementation of the filter bag body 1 , a high temperature resistant layer 24 is provided between the glass fiber layer 23 and the second needle felt layer 12 .

[0047] Specifically, the high temperature resistant layer 24 is woven from a plurality of crisscrossed basalt fiber strands. The basalt fiber strands have a strong heat resistance effect, which is convenient for improving the heat resistance of the filter bag body 1 itself.

[0048] See also Figure 1-Figure 6 As an implementation of the limiting structure: the limiting structure includes a limiting block 25 arranged on the locking column 8, and a limiting groove 26 is provided on the clamping flange 4.

[0049] When the clamping flange 4 is installed, after the clamping flange 4 is sleeved on the corresponding locking column 8 through the mounting hole 9, the limiting block 25 is located in the limiting groove 26, so that the connection stability between the locking column 8 and the limiting sleeve 5 can be improved, thereby improving the connection stability between the clamping flange 4 and the limiting sleeve 5.

[0050] See also Figure 1-Figure 6As an implementation method of the limit sleeve 5: the limit sleeve 5 includes a limit vertical sleeve 27, the limit vertical sleeve 27 is sleeved on the outside of the filter bag body 1, a limit horizontal plate 28 is integrally arranged above the limit vertical sleeve 27, and a limit installation edge 29 is arranged on the limit vertical sleeve 27, wherein a corresponding limit groove structure is opened on the outer flower plate opening to cooperate with the limit installation edge 29.

[0051] The setting of the limiting vertical sleeve 27 can realize the installation of the filter bag body 1. The limiting horizontal plate 28 is used to limit the vertical installation position of the limiting vertical sleeve 27. The limiting installation edge 29 is used to limit the horizontal installation position of the limiting vertical sleeve 27, thereby improving the connection stability between the limiting sleeve 5 and the external flower plate opening, thereby improving the installation stability of the filter bag body 1 at the external flower plate opening.

[0052] See also Figure 1-Figure 6 As an implementation of the limiting sleeve 5 , a protective pad 30 is provided on one side of the limiting vertical sleeve 27 and the limiting horizontal sleeve close to the filter bag body 1 .

[0053] The provision of the protective pad 30 can reduce the wear of the limiting sleeve 5 on the filter bag body 1 .

[0054] In summary, when the overall equipment is in use:

[0055] The limiting sleeve 5 is installed at the position of the external flower plate opening through the limiting installation edge 29, so that the limiting sleeve 5 can be stably installed at the external flower plate opening;

[0056] After that, the keel 3 is inserted into the filter bag body 1, and the lower fixing ring 18, the connecting ring 20 and the connecting column 19 on the filter bag body 1 are inserted into the corresponding fixing clamp ring 17. Here, since the diameter of the filter cloth body is larger than the diameter of the keel 3, the keel 3 can be well inserted into the filter bag body 1.

[0057] Afterwards, the filter bag body 1 carrying the keel 3 is inserted into the limiting sleeve 5 from the bottom end, and the clamping flange 4 at the top of the keel 3 is sleeved on the locking column 8 threaded on the limiting sleeve 5 through the mounting hole 9, and the limiting block 25 is engaged into the limiting groove 26. Afterwards, the locking nut 10 is threaded on the top of the locking column 8 to achieve stable installation between the clamping flange 4 and the limiting sleeve 5. At the same time, the setting of the limiting sleeve 5 can improve the installation stability and sealing of the filter bag body 1 at the external flower plate opening.

[0058] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A PTFE coated needle felt filter bag for chemical dust removal, comprising a filter bag body (1), a limit expansion ring (2) is arranged on the top of the filter bag body (1), a keel (3) is arranged inside the filter bag body (1), and a clamping flange (4) is arranged on the top of the keel (3); Its characteristics are: It also comprises a limiting sleeve (5), the limiting sleeve (5) being sleeved on the top end of the filter bag body (1), the limiting sleeve (5) being provided with a first limiting groove (6) in cooperation with the limiting expansion ring (2), and the bottom end of the clamping flange (4) being provided with a second limiting groove (7) in cooperation with the limiting expansion ring (2); A locking column (8) is screwed on the limiting sleeve (5), a mounting hole (9) is provided on the clamping flange (4), the locking column (8) passes through the mounting hole (9) and extends upwards to be threadedly provided with a locking nut (10), and a limiting structure is provided between the locking column (8) and the clamping flange (4); The filter bag body (1) comprises a first needle-punched felt layer (11) and a second needle-punched felt layer (12); an anti-stretching layer (13) is arranged between the first needle-punched felt layer (11) and the second needle-punched felt layer (12); a first PTFE layer (14) is arranged on the outer side of the first needle-punched felt layer (11); and a second PTFE layer (15) is arranged on the inner side of the second needle-punched felt layer (12).

2. The PTFE coated needle felt filter bag for chemical dust removal according to claim 1 is characterized in that: The inner wall of the filter bag body (1) is provided with wear-resistant strips (16) in cooperation with the keel (3), and fixing clamping rings (17) are evenly arranged on the wear-resistant strips (16).

3. The PTFE coated needle felt filter bag for chemical dust removal according to claim 1 is characterized in that: The keel (3) comprises a lower fixing ring (18) arranged below the clamping flange (4), a connecting column (19) is arranged between the lower fixing ring (18) and the clamping flange (4), and a plurality of connecting rings (20) are longitudinally distributed on the connecting column (19).

4. The PTFE coated needle felt filter bag for chemical dust removal according to claim 1 is characterized by: The anti-stretching layer (13) comprises a P84 fiber layer (21) arranged on the inner side of the first needle-punched felt layer (11), a PPS fiber layer (22) is arranged on the inner side of the P84 fiber layer (21), and a glass fiber layer (23) is arranged on the inner side of the PPS fiber layer (22).

5. The PTFE coated needle felt filter bag for chemical dust removal according to claim 4 is characterized by: A high temperature resistant layer (24) is provided between the glass fiber layer (23) and the second needle felt layer (12).

6. A PTFE coated needle felt filter bag for chemical dust removal according to any one of claims 1 to 5, characterized in that: The limiting joint comprises a limiting block (25) arranged on the locking column (8), and a limiting groove (26) is provided on the clamping flange (4) to cooperate with the limiting block.

7. The PTFE coated needle felt filter bag for chemical dust removal according to claim 1 is characterized by: The limiting sleeve (5) comprises a limiting vertical sleeve (27), the limiting vertical sleeve (27) is sleeved on the outside of the filter bag body (1), a limiting horizontal plate (28) is integrally arranged above the limiting vertical sleeve (27), and a limiting mounting edge (29) is arranged on the limiting vertical sleeve (27).

8. The PTFE coated needle felt filter bag for chemical dust removal according to claim 7, characterized in that: A protective pad (30) is provided on one side of the position-limiting vertical sleeve (27) and the position-limiting horizontal sleeve close to the filter bag body (1).

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