Exhaust filter screen device

Abstract

The utility model provides an exhaust filter screen device. The exhaust filter screen device comprises a first flange, a frame, an end filter screen sheet and a filter screen, the first flange is detachably connected with a second flange at the top of the stock bin; the frame is provided with a cylindrical framework, a plurality of holes are formed in the peripheral side of the framework, and an opening is formed in the end, away from the first flange, of the frame. The end part filter screen sheet is arranged at the opening; the filter screen is connected to the frame and covers the hole. According to the utility model, particle materials can be intercepted, gas can be exhausted, and compared with the prior art, the area of the filter screen for exhausting and filtering is increased, so that the exhausting efficiency is greatly improved, and meanwhile, the cleaning frequency of the filter screen can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, and more specifically to an exhaust filter device. Background Art

[0002] An exhaust filter is a type of dust removal device installed on top of a silo. This type of dust collector is primarily used in mining, metallurgy, building materials, machinery, chemicals, and grain processing industries. It is widely used to filter fine, non-fibrous dry dust from gases or to recover dry powders during process flows. It consists of a filtration system and an exhaust system. The exhaust system's primary structure lies in the exhaust filter, through which gases pass before being discharged. The quality of the exhaust filter in this silo-top dust collection system is crucial.

[0003] Currently, silo-top dust filters on the market typically use an exhaust filter placed inside the exhaust pipe, or add a filter at the outlet of the exhaust pipe. This filter intercepts particulate matter and filters the exhaust gas. This type of exhaust filter requires regular cleaning of the filter after a period of use. If this is not done for a long time, dust accumulation on the filter can clog the exhaust pipe, causing excessive air pressure in the silo and potentially causing the silo to explode. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] The technical problem to be solved by the utility model is that the existing exhaust filter device needs to frequently clean the filter sheet.

[0006] (2) Technical solution

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides an exhaust filter device, comprising a first flange, a frame, an end filter sheet and a filter screen; the first flange is used to be detachably connected to a second flange on the top of a silo; the frame has a cylindrical skeleton, a plurality of holes are provided on the circumference of the skeleton, and an opening is provided at the end of the frame away from the first flange; the end filter sheet is provided at the opening; the filter screen is connected to the frame and covers the holes.

[0009] Preferably, the frame comprises a cylindrical section and a conical section, the conical section is connected to the first flange, and the cylindrical section is connected to the end of the conical section facing away from the first flange.

[0010] Preferably, the frame includes a plurality of longitudinal fixing ribs and a plurality of transverse fixing ribs, the longitudinal fixing ribs are arranged at intervals along the circumference of the first flange, the plurality of transverse fixing ribs are connected to the longitudinal fixing ribs, and the plurality of transverse fixing ribs are arranged at intervals along the length direction of the longitudinal fixing ribs, so that the hole is formed by two adjacent longitudinal fixing ribs and two adjacent transverse fixing ribs.

[0011] Preferably, the longitudinal fixing ribs and the transverse fixing ribs are both made of SS304 stainless steel.

[0012] Preferably, the longitudinal fixing ribs and the transverse fixing ribs are both metal wires with a diameter of 3 mm.

[0013] Preferably, the end filter screen comprises a sheet-shaped frame and a filter screen connected to the sheet-shaped frame.

[0014] Preferably, it further comprises a reducing pipe, wherein the reducing pipe connects the second flange and the first flange.

[0015] Preferably, a third flange and a fourth flange are respectively provided at both ends of the reducer; the third flange is detachably connected to the first flange, and the fourth flange is detachably connected to the second flange.

[0016] Preferably, the filter net is provided with a plurality of filter holes, and the size of the filter holes is 1.5 mm×1.5 mm.

[0017] (3) Beneficial effects

[0018] The above technical solution of the present utility model has at least the following advantages:

[0019] When the present invention is in use, an airflow carrying particulate material enters the present invention and passes through the filter screen. Because the particle size of the particulate material is larger than the aperture of the filter holes in the filter screen, the particulate material is intercepted by the filter screen, but this does not affect the gas from being discharged into the atmosphere through the filter holes in the filter screen. The gas is discharged from the silo, causing the air pressure inside the silo to drop, and the air pressure inside the silo is equal to the atmospheric pressure in the external environment. In other words, the present invention can balance the air pressure inside the silo with the air pressure in the atmosphere outside the silo, preventing the silo from exploding due to an excessive pressure difference between the silo and the atmosphere. Because the present invention is equipped with filter screens on both the frame and the end filter screens, compared to the filter screens placed in the exhaust pipe in the prior art, this embodiment has a larger area for filtering particulate material and exhausting gas, which helps improve gas emission efficiency. At the same time, the larger area for exhausting gas makes it less likely that the exhaust filter screen will become clogged, greatly reducing the frequency of filter screen replacement, lowering production costs, and improving equipment safety. The materials required for the present invention are readily available, and the production cost is low, which greatly reduces production costs. The utility model has low application difficulty and low requirements for the application environment. It has a wider range of actual applications and is not limited to the use of exhaust gas from the dust removal filter on the top of a granular material silo. It has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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.

[0021] Figure 1 It is a structural schematic diagram of the exhaust filter device provided in an embodiment of the present utility model.

[0022] Figure 2 It is a structural schematic diagram of the end filter sheet provided by an embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of the installation of the exhaust filter device and the silo provided in an embodiment of the present utility model.

[0024] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0025] The reference numerals in the figures are:

[0026] 10. Silo; 11. Second flange; 1. First flange; 2. Frame; 3. End filter screen; 4. Filter screen; 5. Reducer; 21. Hole; 22. Opening; 23. Cylindrical section; 24. Conical section; 25. Longitudinal fixing ribs; 26. Transverse fixing ribs; 31. Sheet frame; 51. Third flange; 52. Fourth flange. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or the number of technical features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of this utility model in conjunction with specific embodiments:

[0031] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, an embodiment of the present invention provides an exhaust filter device, comprising a first flange 1, a frame 2, an end filter sheet 3, and a filter screen 4; the first flange 1 is used to be detachably connected to the second flange 11 on the top of the silo 10; the frame 2 has a cylindrical skeleton, and a plurality of holes 21 are provided on the circumference of the skeleton, and an opening 22 is provided at the end of the frame 2 away from the first flange 1; the end filter sheet 3 is provided at the opening 22; the filter screen 4 is connected to the frame 2 and covers the holes 21. Specifically, the first flange 1 is a plate flange, and its outer diameter is preferably DN250. Specifically, the exhaust filter device and the silo 10 are detachably connected through the first flange 1, so as to facilitate the removal of the exhaust filter device from the silo 10 for cleaning or replacement of the filter screen 4. Specifically, a sealing ring is provided on the connection interface between the first flange 1 and the silo 10 to achieve a sealed connection at the connection.

[0032] As one of the optional implementations of this embodiment, the frame 2 includes a cylindrical section 23 and a conical section 24. The conical section 24 is connected to the first flange 1, and the cylindrical section 23 is connected to the end of the conical section 24 facing away from the first flange 1. The conical section 24 has a certain downward slope. After the material accumulates to a certain size on it, the material, under the action of its own gravity, more easily rolls down the slope of the conical section 24 and falls back into the silo 10, thereby further preventing the accumulation of material on the filter screen 4 and preventing the filter screen 4 from being blocked.

[0033] As one of the optional implementations of this embodiment, the frame 2 includes a plurality of longitudinal fixing ribs 25 and a plurality of transverse fixing ribs 26. The longitudinal fixing ribs 25 are arranged at intervals along the circumference of the first flange 1. The plurality of transverse fixing ribs 26 are connected to the longitudinal fixing ribs 25. The plurality of transverse fixing ribs 26 are arranged at intervals along the length direction of the longitudinal fixing ribs 25 so that a hole 21 is formed between two adjacent longitudinal fixing ribs 25 and two adjacent transverse fixing ribs 26.

[0034] As an optional embodiment of this embodiment, both the longitudinal fixing ribs 25 and the transverse fixing ribs 26 are made of SS304 stainless steel. Specifically, SS304 is a stainless steel material, commonly known as 18 / 8 stainless steel, containing 18% Cr and 8% Ni. It has excellent weldability, heat resistance, corrosion resistance, low-temperature strength, processability, and mechanical properties, making it suitable for manufacturing equipment and components requiring excellent overall performance. The longitudinal fixing ribs 25 and transverse fixing ribs 26 enhance the structural strength of the filter screen.

[0035] As an optional embodiment of this embodiment, the longitudinal fixing ribs 25 and transverse fixing ribs 26 are each made of 3 mm diameter metal wire. Specifically, in this embodiment, the longitudinal fixing ribs 25 and transverse fixing ribs 26 are each made of 3 mm diameter stainless steel round bars, totaling 24. The material and dimensions of the longitudinal fixing ribs 25 and transverse fixing ribs 26 can be adjusted according to actual needs, as long as they can provide sufficient support for the filter screen 4.

[0036] As one of the optional implementations of this embodiment, the end filter mesh 3 includes a sheet frame 31 and a filter screen 4 connected to the sheet frame 31. Specifically, the sheet frame 31 is composed of circular steel bars and mesh steel bars. The circular steel bars form the edge of the sheet frame 31, and the mesh steel bars are arranged inside the circular steel bars. The mesh steel bars are formed by cross-connecting stainless steel round steel bars. The circular steel bars and the mesh steel bars are preferably stainless steel round steel bars with a diameter of 3 mm. The end filter mesh 3 can be an integrated structure with the frame 2, or the end filter mesh 3 and the frame 2 can be a split structure, which can be determined according to specific usage requirements.

[0037] As one of the optional implementations of this embodiment, a reducing pipe 5 is further included, which connects the second flange 11 and the first flange 1. Specifically, the diameter of the reducing pipe 5 is larger than the diameter of the air outlet on the silo 10. By adding a reducing pipe 5 with a larger diameter, the volume in the pipeline can be increased without increasing the length of the pipeline, thereby providing more space for accommodating particulate materials, thereby preventing particulate materials from accumulating in the pipeline and causing pipeline blockage. More specifically, the reducing pipe can be composed of a first reducing half pipe and a second reducing half pipe. The first reducing half pipe is a pipe section that changes from a small diameter to a large diameter, which is connected to the side close to the silo, and the second reducing half pipe is a pipe section that changes from a large diameter to a small diameter, which is connected to the side close to the first flange 1. The first reducing half pipe and the second reducing half pipe can be detachably connected by a flange connection.

[0038] As one of the optional implementations of this embodiment, a third flange 51 and a fourth flange 52 are respectively provided at each end of the reducer 5; the third flange 51 is detachably connected to the first flange 1, and the fourth flange 52 is detachably connected to the second flange 11. The detachable connection of the reducer 5 via the third flange 51 and the fourth flange 52 facilitates the cleaning of particulate matter within the reducer 5 or the removal and replacement of the reducer 5.

[0039] As an optional embodiment of this embodiment, the filter screen 4 is provided with a plurality of filter holes, each of which is 1.5 mm x 1.5 mm in size. The filter screen is made of 2 mm diameter steel wire. The material and size of the filter screen 4 can be adjusted according to actual needs and are not limited to this embodiment. It only needs to be smaller than the minimum diameter of the particles to intercept the particles and prevent them from escaping the silo.

[0040] by Figure 3 and Figure 4 Taking the embodiment shown as an example, the implementation principle of the present utility model is as follows:

[0041] Silo 10 is used to store particulate material. The particulate material enters silo 10 with the airflow, and the airflow carries the particulate material into the exhaust filter device provided in this embodiment. After passing through filter 4, the particulate material is intercepted by filter 4 because its particle size is larger than the aperture of the filter holes in filter 4. However, this does not affect the discharge of gas from the filter holes into the atmosphere. The discharge of gas from the silo causes the air pressure inside silo 10 to drop, equalizing the air pressure inside the silo with the atmospheric pressure in the external environment. In other words, the exhaust filter device provided in this embodiment is used to balance the air pressure inside the silo with the air pressure in the atmosphere outside the silo, preventing an excessive pressure difference between the silo and the atmosphere from causing the silo to explode. Since the utility model is provided with a filter screen 4 on both the frame 2 and the end filter screen 3, compared with the filter screen placed in the exhaust pipe in the prior art, the area of ​​​​this embodiment that can be used to filter particulate materials and exhaust gas is larger, which is more conducive to improving the gas emission efficiency. At the same time, the area used for exhaust is larger, and the exhaust filter screen will not be easily clogged, which greatly reduces the replacement frequency of the filter screen 4, reduces production costs, and improves equipment safety.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An exhaust filter device, characterized in that: include: The first flange is used for detachable connection with the second flange on the top of the silo; A frame having a cylindrical skeleton, a plurality of holes being provided on a circumferential side of the skeleton, and an opening being provided at an end of the frame away from the first flange; An end filter sheet is provided at the opening; a filter screen connected to the frame and covering the holes; The frame includes a cylindrical section and a conical section, the conical section is connected to the first flange, and the cylindrical section is connected to an end of the conical section facing away from the first flange.

2. The exhaust filter device according to claim 1, characterized in that: The frame includes a plurality of longitudinal fixing ribs and a plurality of transverse fixing ribs, the longitudinal fixing ribs are arranged at intervals along the circumference of the first flange, the plurality of transverse fixing ribs are connected to the longitudinal fixing ribs, and the plurality of transverse fixing ribs are arranged at intervals along the length direction of the longitudinal fixing ribs, so that the hole is formed by enclosing two adjacent longitudinal fixing ribs and two adjacent transverse fixing ribs.

3. The exhaust filter device according to claim 2, characterized in that: The longitudinal fixing ribs and the transverse fixing ribs are both made of SS304 stainless steel.

4. The exhaust filter device according to claim 2, characterized in that: The longitudinal fixing ribs and the transverse fixing ribs are both metal wires with a diameter of 3 mm.

5. The exhaust filter device according to claim 1, wherein: The end filter screen comprises a sheet-shaped frame and a filter screen connected to the sheet-shaped frame.

6. The exhaust filter device according to claim 1, wherein: It also includes a reducer connecting the second flange and the first flange.

7. The exhaust filter device according to claim 6, characterized in that: A third flange and a fourth flange are respectively provided at both ends of the reducer; the third flange is detachably connected to the first flange, and the fourth flange is detachably connected to the second flange.

8. The exhaust filter device according to claim 1, wherein: The filter net is provided with a plurality of filter holes, and the size of the filter holes is 1.5 mm×1.5 mm.

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