A steel ring reusable filter bag

Abstract

The utility model relates to a filter bag with reusable steel ring, which comprises a filter bag body and a steel ring, wherein the filter bag body is in a bag-like structure with a closed bottom and an open top end, the open end of the filter bag body is provided with a filter bag head, and the top end of the filter bag head is provided with a sealing positioning ring; the steel ring is detachably installed at the open end of the filter bag body, and the steel ring comprises a steel ring body embedded in the inner circumferential surface of the filter bag head and a connecting lug provided on the steel ring body and extending outward from the filter bag body. The steel ring is convenient to disassemble and assemble, and can be removed and reused when the filter bag body is replaced, thereby reducing the use cost of the filter bag.

Description

Technical Field

[0001] This utility model belongs to the technical field of filter bags for air filtration, and specifically relates to a filter bag with reusable steel rings. Background Technology

[0002] With rapid economic development comes environmental pollution, and the country is paying increasing attention to its control. The main types of exhaust gas filtration on the market are filter bags and cartridge dust collectors, with bag filters being particularly common. The filter bag is the "heart" of the bag filter, and its material and manufacturing process greatly affect the filtration accuracy and efficiency.

[0003] Existing filter bags typically have a grooved gasket and a steel ring inside the filter bag head. The grooved gasket is used for assembly and positioning of the filter bag and the tube sheet, ensuring a tight seal at the joint. The steel ring is used to shape and support the open end of the filter bag (i.e., the air inlet), acting as a "skeleton" to ensure a stable connection between the filter bag and the tube sheet while allowing the air to be filtered to enter the filter bag smoothly. However, in most existing filter bags, the steel ring is sewn and fixed inside the filter bag head. When the filter bag is replaced, the steel ring must also be discarded, making it impossible to reuse and directly increasing the operating cost of the filter bag. Utility Model Content

[0004] The purpose of this invention is to provide a filter bag with reusable steel rings to solve the problem that steel rings cannot be reused.

[0005] The reusable steel ring filter bag of this utility model is achieved as follows:

[0006] A reusable filter bag with a steel ring, comprising:

[0007] The filter bag body is a bag-shaped structure that is closed at the bottom and open at the top. The open end of the filter bag body is provided with a filter bag head, and the top of the filter bag head is provided with a sealing positioning ring.

[0008] A steel ring, which is detachably installed at the open end of the filter bag body, the steel ring including a steel ring body nested in the inner ring surface of the filter bag head, and a connecting ear disposed on the steel ring body and extending outward from the filter bag body.

[0009] Furthermore, the filter bag body includes a cylindrical body and a bag bottom that is sewn and fixed to the bottom of the cylindrical body.

[0010] Furthermore, the outer sealing layer is wrapped around the seam between the cylinder body and the bottom of the bag by means of sewing.

[0011] Furthermore, the filter bag head includes a bag head piece disposed on the upper end of the filter bag body in a folded manner with the opening facing downwards, and the sealing positioning ring is a positioning rope loop disposed in the internal space of the folded part of the bag head piece;

[0012] The cross-sectional diameter of the rope forming the positioning rope loop is 6mm;

[0013] Below the positioning rope loop, there is at least one first stitch for sewing and fixing the two layers of bag head pieces.

[0014] Furthermore, at least two turns of second stitching are provided on the lower side of the first stitching for connecting the bag head piece and the filter bag body.

[0015] Furthermore, the lower edge of the bag head piece is sewn and fixed to the filter bag body by at least two turns of third stitching.

[0016] Furthermore, the steel ring body is formed by strip-shaped steel plates, and its two ends are fixed by welding or screws.

[0017] Furthermore, the connecting ear has an L-shaped structure, with its inner side plate arranged vertically and fixed to the inner wall of the steel ring body, and its outer side plate arranged horizontally and extending outward along the radial direction of the steel ring body.

[0018] Furthermore, the connecting lug is fixed to the inner wall of the steel ring body by welding or screws.

[0019] Furthermore, at least three connecting ears are provided, and they are evenly distributed on the steel ring body.

[0020] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0021] (1) The present invention assembles the steel ring in the inner ring of the filter bag head in a nested and detachable manner, which is convenient to disassemble and assemble. When replacing the filter bag body, the steel ring can be removed and reused, which reduces the cost of using the filter bag.

[0022] (2) By setting connecting ears on the steel ring, this utility model can not only limit the steel ring, but also further increase the convenience of disassembling and assembling the steel ring.

[0023] (3) By setting a sealing positioning ring at the top of the filter bag head, this utility model can realize the positioning of the filter bag on the tube sheet, prevent the filter bag from falling off, and at the same time ensure the sealing of the assembly of the filter bag and the tube sheet. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1This is an axial cross-sectional view of a filter bag with a reusable steel ring according to a preferred embodiment of the present invention.

[0026] Figure 2 yes Figure 1 Enlarged view of section A;

[0027] Figure 3 yes Figure 1 Enlarged view of section B;

[0028] Figure 4 This is a schematic diagram of the steel ring of a filter bag with a reusable steel ring according to a preferred embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the assembly of a filter bag with a reusable steel ring and a perforated plate according to a preferred embodiment of the present invention.

[0030] In the diagram: Filter bag body 1, cylinder 1-1, bag bottom 1-2, steel ring 2, steel ring body 2-1, connecting ear 2-2, filter bag head 3, sealing positioning ring 3-1, bag head piece 3-2, positioning rope ring 3-3, outer sealing layer 4, first stitch 5, second stitch 6, third stitch 7, fourth stitch 8, fifth stitch 9, perforated plate 10, mounting hole 11. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] like Figure 1-5As shown, a reusable filter bag with a steel ring includes a filter bag body 1 and a steel ring 2. The filter bag body 1 is a bag-shaped structure with a closed bottom and an open top. A filter bag head 3 is provided at the open end of the filter bag body 1, and a sealing positioning ring 3-1 is provided at the top of the filter bag head 3. The steel ring 2 is detachably installed at the open end of the filter bag body 1. The steel ring 2 includes a steel ring body 2-1 nested in the inner ring surface of the filter bag head 3, and a connecting ear 2-2 provided on the steel ring body 2-1 and extending outward from the filter bag body 1.

[0034] In order to form a bag-shaped structure with one end open and the other end closed, the filter bag body 1 includes a cylindrical body 1-1 and a bag bottom 1-2 sewn and fixed to the bottom of the cylindrical body 1-1.

[0035] Specifically, the cylinder body 1-1 is a cylindrical structure open at both ends, and the bag bottom 1-2 is sewn to the bottom of the cylinder body 1-1. The cylinder body 1-1 can be made of sheet filter material, that is, the two sides of the sheet filter material are connected together by means of sewing or gluing to form a cylindrical structure open at both ends.

[0036] In this embodiment, the outer edge of the bag bottom 1-2 is folded down and the folded part is attached to the inner wall of the lower end of the tube body 1-1, and then the attachment is fixed by at least two turns of fifth stitching 9.

[0037] To prevent dust leakage at the seam between the cylinder body 1-1 and the bottom of the bag 1-2 and to ensure the filtration effect of the filter bag, an outer sealing layer 4 is wrapped around the seam between the cylinder body 1-1 and the bottom of the bag 1-2 by sewing.

[0038] Specifically, the outer sealing layer 4 has a U-shaped cross-section, with one edge attached to the outer surface of the tube body 1-1, and the other edge wrapping around the bottom of the connection between the tube body 1-1 and the bottom of the bag 1-2 and attaching to the inner surface of the folded part of the bottom of the bag 1-2.

[0039] When fixing the outer sealing layer 4, its outer part is sewn to the tube body 1-1 by at least one round of fourth suture 8, while the lower part of its outer part and its inner part are directly sewn to the tube body 1-1 and the bag body by the fifth suture 9.

[0040] The sealing positioning ring 3-1 is designed to facilitate the assembly of the filter bag and the tube sheet 10. In order to form the sealing positioning ring 3-1 structure, the filter bag head 3 includes a bag head piece 3-2 that is folded down with the opening facing downwards at the upper end of the filter bag body 1. The sealing positioning ring 3-1 is a positioning rope loop 3-3 that is set in the internal space of the folded part of the bag head piece 3-2.

[0041] Specifically, the bag head piece 3-2 forms a downward-facing folded structure at the upper end of the filter bag body 1, and the positioning rope loop 3-3 is placed in the internal space of the folded part to form a convex ring structure at the top of the filter bag head 3 with a thickness much greater than that of the filter bag body 1.

[0042] When installing the filter bag onto the tube sheet 10, insert the filter bag into the mounting hole 11 on the tube sheet 10 with the bottom 1-2 of the bag facing down until the sealing positioning ring 3-1 is in contact with the upper surface of the tube sheet 10. Then, through cooperation with the steel ring 2, the sealing positioning ring 3-1 is locked above the mounting hole 11, which can prevent the filter bag from falling off and at the same time ensure the sealing between the mounting hole 11 and the filter bag.

[0043] To ensure the positioning and sealing effect of the sealing positioning ring 3-1, the cross-sectional diameter of the rope forming the positioning rope loop 3-3 is 6mm.

[0044] Preferably, the rope is made of the same filter material as the filter bag body 1.

[0045] In order to fix the positioning rope loop 3-3, at least one first stitch 5 is provided below the positioning rope loop 3-3 for sewing and fixing the two layers of bag head piece 3-2.

[0046] The first suture line 5 sews the two layers of bag head piece 3-2 together to form a receiving cavity below the folded part of the bag head piece 3-2. The positioning rope loop 3-3 can be fixed in the receiving cavity to prevent the positioning rope loop 3-3 from falling off.

[0047] In order to fix the bag head piece 3-2 to the upper end of the cylinder body 1-1, at least two turns of second stitching 6 are provided on the lower side of the first stitching 5 to connect the bag head piece 3-2 and the filter bag body 1.

[0048] The double-layered portion of the bag head piece 3-2 located below the first suture line 5 is placed on the outside of the tube body 1-1, that is, the upper part of the tube body 1-1 is attached to the inner wall of the folded double-layered bag head piece 3-2. Then, the double-layered portion of the bag head piece 3-2 and the tube body 1-1 are sewn and fixed together by the second suture line 6 near the upper end of the tube body 1-1.

[0049] In order to secure the edge of the bag head piece 3-2, the lower edge of the bag head piece 3-2 is sewn to the filter bag body 1 by at least two turns of third stitch 7.

[0050] The double-layered part of the bag head piece 3-2 is attached to the outer side of the tube body 1-1, and the third stitch 7 can sew the double-layered part and the inner side of the tube body 1-1 together.

[0051] In order to support and shape the open end of the filter bag body 1, the steel ring body 2-1 is formed by strip steel plates, and its two ends are fixed by welding or screws.

[0052] The steel ring body 2-1 has certain deformability. When it is nested into the inner ring of the filter bag head 3, the steel ring body 2-1 can be slightly bent. After it is installed, it can be reset to a circle and supported on the inside of the opening end of the filter bag body 1.

[0053] In this embodiment, the two ends of the strip steel plate are overlapped and connected by screws to form a circular steel ring body 2-1.

[0054] The connection ear 2-2 not only prevents the steel ring body 2-1 from shifting downward inside the filter bag body 1, affecting its support effect on the opening end of the filter bag body 1 (i.e., the stability of the filter bag installation), but also facilitates the disassembly and assembly of the steel ring 2. To achieve this technical effect, the connection ear 2-2 has an L-shaped structure, with its inner side plate set vertically and fixed to the inner wall of the steel ring body 2-1, and its outer side plate arranged horizontally and extending outward along the radial direction of the steel ring body 2-1.

[0055] Preferably, the width of the connecting ear 2-2 is 1cm, the bend is 90°, and the length of the outer plate of the connecting ear 2-2 is at least 1cm.

[0056] To secure the connecting ear 2-2, the connecting ear 2-2 is fixed to the inner wall of the steel ring body 2-1 by welding or screws.

[0057] In this embodiment, the connecting ear 2-2 is fixed to the inner wall of the steel ring body 2-1 by screws.

[0058] To further facilitate the assembly and disassembly of the steel ring 2 and to limit the movement of the steel ring 2, at least three connecting ears 2-2 are provided and are evenly distributed on the steel ring body 2-1.

[0059] In this embodiment, three connecting lugs 2-2 are evenly arranged on the steel ring body 2-1.

[0060] Preferably, the stitch spacing of the suture is 25-35 stitches per 10cm, which can prevent the ash from leaking out at the suture.

[0061] The distances of the second stitch 6 from the upper end of the tube body 1-1, the third stitch 7 from the edge of the bag head piece 3-2, the fourth stitch 8 from the outer edge of the outer sealing layer 4, and the fifth stitch 9 from the bottom of the tube body 1-1, the edge of the bag body, and the inner edge of the outer sealing layer 4 are all 2-3mm. This can prevent the stitches from coming loose.

[0062] This invention detachably assembles a steel ring 2 with connecting ears 2-2 inside the opening end of the filter bag body 1 in a nested manner. This allows the steel ring 2 to be quickly disassembled when replacing the filter bag, enabling the steel ring 2 to be reused and effectively reducing the cost of using the filter bag.

[0063] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A filter bag with a reusable steel ring, characterized in that, include The filter bag body (1) is a bag-shaped structure with a closed bottom and an open top. The filter bag body (1) has a filter bag head (3) at the open end, and a sealing positioning ring (3-1) is provided at the top of the filter bag head (3). A steel ring (2) is detachably installed at the open end of the filter bag body (1). The steel ring (2) includes a steel ring (2) body nested in the inner ring surface of the filter bag head (3) and a connecting ear (2-2) disposed on the steel ring (2) body and extending outward from the filter bag body (1).

2. The reusable steel ring filter bag according to claim 1, characterized in that, The filter bag body (1) includes a cylindrical body (1-1) and a bag bottom (1-2) sewn and fixed to the bottom of the cylindrical body (1-1).

3. The reusable steel ring filter bag according to claim 2, characterized in that, The outer sealing layer (4) is wrapped around the seam between the cylinder body (1-1) and the bottom of the bag (1-2) by stitching.

4. The reusable filter bag with steel ring according to claim 1, characterized in that, The filter bag head (3) includes a bag head piece (3-2) that is folded down with the opening facing downwards at the upper end of the filter bag body (1), and the sealing positioning ring (3-1) is a positioning rope loop (3-3) that is set in the internal space of the folded part of the bag head piece (3-2); The cross-sectional diameter of the rope forming the positioning rope loop (3-3) is 6mm; Below the positioning rope loop (3-3), there is at least one first suture line (5) for sewing and fixing the two layers of bag head piece (3-2).

5. The reusable steel ring filter bag according to claim 4, characterized in that, The lower side of the first suture (5) is provided with at least two turns of second suture (6) for connecting the bag head piece (3-2) and the filter bag body (1).

6. The reusable steel ring filter bag according to claim 5, characterized in that, The lower edge of the bag head piece (3-2) is sewn and fixed to the filter bag body (1) by at least two turns of third stitch (7).

7. The reusable steel ring filter bag according to claim 1, characterized in that, The steel ring (2) body is formed by strip steel plates, and its two ends are fixed by welding or screws.

8. The reusable steel ring filter bag according to claim 1, characterized in that, The connecting ear (2-2) has an L-shaped structure. Its inner side plate is vertically arranged and fixed on the inner wall of the steel ring (2) body, and its outer side plate is horizontally arranged and extends outward along the radial direction of the steel ring (2) body.

9. The reusable steel ring filter bag according to claim 8, characterized in that, The connecting lug (2-2) is fixed to the inner wall of the steel ring (2) body by welding or screws.

10. The reusable steel ring filter bag according to claim 1, characterized in that, At least three connecting ears (2-2) are provided and are evenly distributed on the body of the steel ring (2).

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