Metal filter bag with venturi tube

By setting up a venturi tube with multiple card parts interfering with the connecting ring on the metal filter bag, the problems of inconvenience in installation and increased air resistance in the prior art are solved, and easy installation is achieved, the cost of disassembly and assembly and air resistance are reduced, and the service life of the filter bag is extended.

CN223263569UActive Publication Date: 2025-08-26GUANGDONG XINLI NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202422550248.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2025-08-26
Estimated Expiration
2034-10-22

AI Technical Summary

Technical Problem

After adding venturi pipes to existing metal filter bags, the air resistance increases and the installation is inconvenient, the disassembly and assembly costs are high, and ordinary venturi pipes are prone to eccentricity.

Method used

A metal filter bag with venturi tube is designed. By uniformly setting multiple card parts on the side of the conical part of the venturi tube and interfering with the connecting ring, it is fixed by welding to ensure high coaxiality, uniform distribution of backblowing gas, and reducing air resistance.

Benefits of technology

It realizes the venturi tubes to be easy to install and disassemble, reduces the cost of disassembly and assembly, improves the coaxiality, reduces the risk of filter bags to break, extends service life, and reduces air resistance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a metal filter bag with a venturi tube. The metal filter bag comprises a metal filter bag body and the venturi tube, the metal filter bag body is provided with an upper opening, and the upper opening is provided with a connecting ring; the venturi tube is mounted on the connecting ring, the venturi tube comprises a conical cylinder part and a plurality of clamping sheet parts, a small opening is formed in one end, facing the metal filter bag body, of the conical cylinder part, a large opening is formed in one end, back to the metal filter bag body, of the conical cylinder part, and the clamping sheet parts are uniformly arranged on the outer side surface of the conical cylinder part; and the plurality of card parts are in interference fit with the inner side surface of the connecting ring. In the back-blowing ash removal process, the venturi tube is additionally arranged to promote uniform distribution of back-blowing gas and reduce direct impact of the back-blowing gas on a bag opening of the filter bag, meanwhile, part of gas flows out of the space between the conical cylinder part and the connecting ring, and the resistance of the metal filter bag can be reduced. Therefore, the metal filter bag with the venturi tube is easy to install, the coaxiality of the venturi tube and the metal filter bag is high, and the air resistance is far smaller than that of a common venturi tube.
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Description

Technical Field

[0001] The utility model relates to the field of metal filter bags, in particular to a metal filter bag with a venturi tube. Background Art

[0002] Metal filter bags require pulse backflushing for cleaning. This backflushing uses room-temperature compressed air. The Venturi can guide the flue gas and backflushing compressed air to mix, preventing condensation and corrosion on the filter bags. Furthermore, the Venturi can draw in more flue gas for backflushing, facilitating cleaning. Currently, adding a Venturi to a metal filter bag increases air resistance. Furthermore, conventional Venturi installations are prone to eccentricity. Adding a conventional Venturi after a metal filter bag is installed requires disassembly of the filter bag's pressure plate, resulting in relatively high installation and disassembly costs. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a metal filter bag with a venturi tube, which is easy to install, has high coaxiality between the venturi tube and the metal filter bag, and has much less air resistance than an ordinary venturi tube.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A metal filter bag with a venturi tube, comprising

[0006] The metal filter bag body is provided with an upper opening, and the upper opening is provided with a connecting ring;

[0007] A venturi tube is installed on the connecting ring. The venturi tube includes a conical cylinder portion and a card portion. The conical cylinder portion is provided with a small opening at one end facing the metal filter bag body, and the conical cylinder portion is provided with a large opening at one end facing away from the metal filter bag body. The card portions are provided with multiple and evenly arranged on the outer side surface of the conical cylinder portion, and the multiple card portions are interference fit with the inner side surface of the connecting ring.

[0008] According to an embodiment of the present invention, a metal filter bag with a venturi tube has at least the following beneficial effects: the metal filter bag has multiple card portions evenly arranged on the side of the venturi tube cone, and the multiple card portions are interference fit with the inner side of the connecting ring. Therefore, the venturi tube is easy to install, the disassembly and assembly costs are low, and the coaxiality between the venturi tube and the metal filter bag is high. In addition, during the backflush cleaning process, the backflush gas enters from the large opening of the venturi tube and blows out from the small opening. The addition of the venturi tube promotes the uniform distribution of the backflush gas, reduces the direct impact of the backflush gas on the bag opening, thereby reducing the risk of the bag opening rupture and extending the service life of the filter bag. At the same time, some gas flows out of the space between the cone and the connecting ring, which can reduce the resistance of the metal filter bag, thereby providing a higher peak pressure of the backflush gas, which is beneficial for cleaning. Therefore, the metal filter bag with a venturi tube is easy to install, the coaxiality between the venturi tube and the metal filter bag is high, and the air resistance is much smaller than that of an ordinary venturi tube.

[0009] According to some embodiments of the present invention, the large opening is provided with an annular top edge, one side of the card portion is connected to the outer side surface of the conical cylinder portion, and the other side of the card portion is connected to the bottom surface of the top edge.

[0010] Advantageously, the top edge is connected to the card portion, which helps to provide the card portion with a firmness and prevent the card portion from folding and deforming.

[0011] According to some embodiments of the present invention, the card portion and the outer side surface of the conical portion, and the card portion and the top edge bottom surface are fixed by welding.

[0012] Advantages include: welding fixation, simple process, reliable connection, and long service life. Of course, in addition to welding, it can also be made in the form of integral casting or 3D printing.

[0013] According to some embodiments of the present invention, the card portion is provided with a square notch, one side of the square notch is interference fit with the inner side surface of the connecting ring, and the other side of the square notch abuts against the upper edge of the connecting ring.

[0014] Advantageously, the square notch is provided to facilitate the coordinated installation of the card portion and the connecting ring, thereby ensuring coaxiality.

[0015] According to some embodiments of the present invention, the number of the card parts is 3 or more.

[0016] Advantageously, providing three or more card portions can provide sufficient support for the conical portion, facilitate gas discharge, and reduce resistance of the metal filter bag.

[0017] According to some embodiments of the present invention, a straight cylindrical portion connected to the conical cylindrical portion is provided at the small opening.

[0018] Advantageously, the provision of the straight tube portion is conducive to maintaining a stable back-flushing airflow during the back-flushing cleaning process.

[0019] According to some embodiments of the present invention, an end of the straight cylindrical portion facing away from the conical cylindrical portion is provided with an outward-turned bottom edge.

[0020] Advantageously, the outward-turned bottom edge can guide the airflow toward the inner side of the metal filter bag body.

[0021] According to some embodiments of the present invention, the metal filter bag body includes a metal frame and a metal filter cloth covering the outside of the metal frame.

[0022] The benefit is that the metal filter bag body is arranged in this way and has a firm structure, the metal frame plays a supporting and fixing role, and the metal filter cloth plays a role in filtering dust.

[0023] According to some embodiments of the present invention, the connecting ring is in the shape of a T-ring, and the lower end of the connecting ring is sleeved on the outer side surface of the upper opening.

[0024] Advantageously, the connection ring is arranged in this way to fix the upper opening of the metal filter cloth body, which is beneficial for installing the venturi tube.

[0025] According to some embodiments of the present invention, the metal filter bag body is provided with a lower opening, and the lower opening is provided with a bottom cover.

[0026] Advantageously, the lower opening is provided to facilitate the production and maintenance of the metal filter bag, and the bottom cover is provided to facilitate fixing the lower opening of the metal filter bag body.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Enlarged schematic diagram of the connecting ring and venturi tube;

[0031] Figure 3 for Figure 2 Schematic diagram of the Chinese tubules;

[0032] Figure 4 for Figure 3 Schematic diagram of the Venturi tube from another angle;

[0033] Figure 5 for Figure 1 Schematic diagram of the decomposition.

[0034] Reference numerals: metal filter bag body 100 , connecting ring 110 , venturi 120 , conical portion 130 , card portion 140 , top edge 150 , square notch 160 , straight portion 170 , bottom edge 180 , metal frame 190 , metal filter cloth 200 , bottom cover 210 . DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. If a first or second is mentioned, this is solely for the purpose of distinguishing the technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0038] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted, connected, and connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] Reference below Figure 1-Figure 5 A metal filter bag with a venturi tube is described in detail with reference to a specific embodiment. It is worth noting that the following description is merely an exemplary description and is not intended to limit the present invention.

[0040] like Figures 1-4 As shown, a metal filter bag with a venturi tube 120 includes a metal filter bag body 100 and a venturi tube 120 .

[0041] The metal filter bag body 100 has an upper opening (not shown in the figure) with a connecting ring 110 mounted thereon. A venturi tube 120 is mounted on the connecting ring 110. The venturi tube 120 includes a conical portion 130 and a clip portion 140. The conical portion 130 has a small opening at one end facing the metal filter bag body 100 and a large opening at the end facing away from the metal filter bag body 100 (not shown in the figure). Multiple clip portions 140 are evenly distributed on the outer side of the conical portion 130, and the multiple clip portions 140 have an interference fit with the inner side of the connecting ring 110. By evenly distributing multiple clip portions 140 on the conical side of the venturi tube 120 and having an interference fit with the inner side of the connecting ring 110, the metal filter bag is easy to install, has low assembly and disassembly costs, and maintains high coaxiality between the venturi tube 120 and the metal filter bag. Furthermore, during backflush cleaning, backflush gas enters through the large opening of the venturi tube 120 and exits through the smaller opening. The addition of the venturi tube 120 promotes even distribution of the backflush gas, reducing its direct impact on the filter bag opening, thereby reducing the risk of rupture and extending the filter bag's service life. Furthermore, some gas flows out of the space between the conical portion 130 and the connecting ring 110, reducing the resistance of the metal filter bag. This provides a higher peak pressure for the backflush gas, facilitating cleaning. Therefore, the metal filter bag with the venturi tube 120 is easy to install, the venturi tube 120 and the metal filter bag are highly coaxial, and the air resistance is much lower than that of a conventional venturi tube 120.

[0042] like Figure 2-Figure 4 As shown, the large opening is provided with an annular top edge 150. One side of the card portion 140 is connected to the outer side of the conical portion 130, and the other side of the card portion 140 is connected to the bottom surface of the top edge 150. The connection between the top edge 150 and the card portion 140 helps to ensure the card portion 140 is secure and prevents it from bending or deforming. Furthermore, the card portion 140 is secured to the outer side of the conical portion 130 and to the bottom surface of the top edge 150 by welding. Welding offers a simple process, a secure connection, and a long service life. Of course, in addition to welding, integral casting or 3D printing can also be used. Furthermore, the card portion 140 is provided with a square notch 160. One side of the square notch 160 has an interference fit with the inner side of the connecting ring 110, while the other side of the square notch 160 abuts the upper edge of the connecting ring 110. The square notch 160 facilitates the installation of the card portion 140 and the connecting ring 110, ensuring coaxiality. Specifically, the number of card portions 140 is three or more. Providing three or more card portions 140 can provide sufficient support for the conical cylinder portion 130 , while facilitating gas discharge and reducing resistance of the metal filter bag.

[0043] It needs to be said that if Figure 3 and Figure 4As shown, a straight portion 170 connected to the conical portion 130 is provided at the small opening. The straight portion 170 facilitates maintaining stable backwash airflow during backwash cleaning. Furthermore, an outward-turned bottom edge 180 is provided at the end of the straight portion 170 facing away from the conical portion 130. This outward-turned bottom edge 180 serves to guide airflow, directing it toward the inner side of the metal filter bag body 100.

[0044] like Figure 5 As shown, the metal filter bag body 100 includes a metal frame 190 and a metal filter cloth 200 covering the outside of the metal frame 190. The metal filter bag body 100 is arranged in this way to have a firm structure. The metal frame 190 plays a supporting and fixing role, and the metal filter cloth 200 plays a role in filtering dust. It can be understood that the connecting ring 110 is in the shape of a T-ring, and the lower end of the connecting ring 110 is sleeved on the outer side of the upper opening. The connecting ring 110 is arranged in this way to fix the upper opening of the metal filter cloth 200 body, which is convenient for installing the venturi tube 120. It is worth mentioning that the metal filter bag body 100 is provided with a lower opening, and the lower opening is provided with a bottom cover 210. The provision of the lower opening facilitates the production and maintenance of the metal filter bag, and the provision of the bottom cover 210 is convenient for fixing the lower opening of the metal filter bag body 100.

[0045] Throughout this specification, references to terms such as "one embodiment, some embodiments, exemplary embodiments, examples, specific examples, or some examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A metal filter bag with a venturi tube, characterized in that: include: The metal filter bag body (100) is provided with an upper opening, and the upper opening is provided with a connecting ring (110); A venturi tube (120) is mounted on the connecting ring (110), the venturi tube (120) comprising a conical cylinder portion (130) and a card portion (140), the conical cylinder portion (130) having a small opening at one end facing the metal filter bag body (100), and a large opening at one end facing away from the metal filter bag body (100), the card portion (140) having a plurality of cards evenly arranged on the outer side surface of the conical cylinder portion (130), and the plurality of card portions (140) having an interference fit with the inner side surface of the connecting ring (110).

2. The metal filter bag with a venturi tube according to claim 1, characterized in that: The large opening is provided with an annular top edge (150), one side of the card portion (140) is connected to the outer side surface of the conical cylinder portion (130), and the other side of the card portion (140) is connected to the bottom surface of the top edge (150).

3. The metal filter bag with a venturi tube according to claim 2, characterized in that: The card portion (140) and the outer side surface of the conical cylinder portion (130), and the card portion (140) and the bottom surface of the top edge (150) are fixed by welding.

4. The metal filter bag with a venturi tube according to claim 1, characterized in that: The card portion (140) is provided with a square notch (160), one side of the square notch (160) is interference-fitted with the inner side surface of the connecting ring (110), and the other side of the square notch (160) abuts against the upper edge of the connecting ring (110).

5. The metal filter bag with a venturi tube according to claim 1, characterized in that: The number of the card parts (140) is more than 3.

6. The metal filter bag with a venturi tube according to claim 1, characterized in that: A straight cylinder portion (170) connected to the tapered cylinder portion (130) is provided at the small opening.

7. The metal filter bag with a venturi tube according to claim 6, characterized in that: An end of the straight cylinder portion (170) facing away from the conical cylinder portion (130) is provided with an outward-turned bottom edge (180).

8. The metal filter bag with a venturi tube according to claim 1, characterized in that: The metal filter bag body (100) comprises a metal frame (190) and a metal filter cloth (200) covering the outside of the metal frame (190).

9. The metal filter bag with a venturi tube according to claim 8, characterized in that: The connecting ring (110) is in the shape of a T-shaped ring, and the lower end of the connecting ring (110) is sleeved on the outer side surface of the upper opening.

10. The metal filter bag with a venturi tube according to claim 8, characterized in that: The metal filter bag body (100) is provided with a lower opening, and the lower opening is provided with a bottom cover (210).