filter

Abstract

The application belongs to the technical field of industrial pneumatic conveying, and particularly relates to a filter-resistor, which comprises a shell, filter structures and ash-resisting structures are respectively arranged in cavities of the shell near left and right sides, female adapter plates are fixedly arranged on outer walls of the shell near left and right sides, and male adapter plates are arranged on sides away from the two female adapter plates. The filter-resistor integrates the filter and the ash-resisting device, the structural size is greatly reduced compared with the original two independent devices connected in series, the pipeline arrangement space is saved, the installation cost is reduced, the stainless steel anti-falling net bag is arranged in the filter-resistor, the fluorine rubber pad can be effectively intercepted when it falls off, the rubber pad is prevented from being clamped into the downstream air inlet pipeline, the main air inlet channel is ensured to be unobstructed, the safe and stable operation of the ash conveying system is ensured, the intermediate connection between the filter and the ash-resisting device is cancelled through the integrated design, the leakage points are reduced, and the overall sealing reliability of the system is improved.

Description

Technical Field

[0001] This invention belongs to the field of industrial pneumatic conveying technology, and specifically relates to filter resistors. Background Technology

[0002] In industrial pneumatic conveying systems (such as fly ash pneumatic conveying systems in thermal power plants, metallurgy, and chemical industries), compressed air is the primary power source. During the conveying process, ash accumulation and backflow occur inside the pipelines and in upstream equipment: on the one hand, dust carried by the airflow can enter downstream air-consuming equipment in the forward direction, causing equipment wear and blockage; on the other hand, when the system stops or pressure fluctuates, the downstream ash can flow back in the reverse direction, also affecting the normal operation of the system.

[0003] To address these issues, existing technologies typically involve installing separate pipeline filters (to intercept incoming ash from the forward direction) and ash blockers (to prevent incoming ash from the reverse direction) on the pipeline, with both installed in series as independent devices. However, as industrial systems increasingly demand compactness, reliability, and ease of maintenance, the traditional split-type design has become increasingly apparent, exhibiting drawbacks such as large structural space requirements, numerous interfaces leading to high leakage risks, and high maintenance costs.

[0004] Therefore, the present invention proposes a filter resistor to solve the above problems. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a filter resistor with advantages such as compact structure and good sealing performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a filter, comprising a housing, wherein a filter structure and a dust-blocking structure are respectively installed on the left and right sides of the inner cavity of the housing, and female mating plates are fixedly fitted onto the outer wall of the housing on both the left and right sides. Male mating plates are installed on the opposite sides of the two female mating plates. An air inlet channel and an air outlet channel are respectively installed on the two male mating plates. The air inlet channel and the air outlet channel are adjacent to the filter structure and the dust-blocking structure, respectively. Flanges are installed on the opposite sides of the air inlet channel and the air outlet channel. An air inlet pipe and an air outlet pipe are respectively mated and installed on the two flanges. The air inlet pipe is connected to the air inlet channel, and the air outlet pipe is connected to the air outlet channel. Pressure gauges are installed on the outer sides of both the air inlet channel and the air outlet channel. Multiple bolts are installed between adjacent flanges and between the male and female mating plates.

[0007] As a preferred embodiment of the filter resistor of the present invention, the filter structure includes a support step, which is formed on the inner wall of the housing near the left side, and a groove is formed on the support step. A filter element is installed in the inner cavity of the groove, and a pressure cap is installed on the outer wall of the support step. Fasteners are installed between the pressure cap and the support step.

[0008] As a preferred embodiment of the filter resistor of the present invention, the dust blocking structure includes a valve core, which is installed on the inner wall of the housing near the right side, and a mesh pocket is provided on the right side of the valve core. The mesh pocket is fixed to the inner wall of the housing by integral welding.

[0009] As a preferred embodiment of the filter element of the present invention, the filter element is made of L200 type 304 stainless steel.

[0010] As a preferred embodiment of the filter resistor of the present invention, the valve core is a reverse-flow fluorinated rubber pad.

[0011] As a preferred embodiment of the filter of the present invention, the mesh bag is made of 304 stainless steel.

[0012] As a preferred embodiment of the filter resistor of the present invention, the opening size of the mesh bag is smaller than the outer contour size of the valve core.

[0013] As a preferred embodiment of the filter resistor of the present invention, the housing is made of 20# steel.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Compact structure, saving installation space: The new filter integrates the filter and the dust collector into one unit. The structural size is significantly reduced compared to the original two independent units installed in series, saving pipeline layout space and reducing installation costs.

[0016] 2. Prevent rubber pad from falling off, ensuring safe system operation: The filter is equipped with a stainless steel anti-fall-off mesh bag, which can effectively intercept when the fluororubber pad falls off, preventing the pad from getting stuck in the downstream air intake pipe, ensuring the main air intake channel is unobstructed, and ensuring the safe and stable operation of the ash conveying system.

[0017] 3. Reduced interfaces and lower leakage risk: The integrated design eliminates the intermediate connection between the filter and the dust arrester, reducing leakage points and improving the overall sealing reliability of the system;

[0018] 4. Differential pressure monitoring for convenient maintenance: Pressure gauges are installed at the inlet and outlet to monitor the differential pressure of the filter element in real time, making it easy to determine the filter element clogging status, enabling preventive maintenance and reducing unplanned downtime;

[0019] 5. It also has a two-way dust blocking function: the filter zone intercepts incoming dust from the forward direction, and the dust blocking zone prevents incoming dust from the reverse direction, achieving two-way dust protection in one integrated system. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1This is a schematic diagram of the external planar structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0024] Figure 4 This is a structural distribution diagram of the filter structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the pressure gauge and other components of the present invention;

[0026] In the diagram: 1. Shell; 2. Filter structure; 21. Support step; 22. Groove; 23. Filter element; 24. Gland cap; 3. Dust-blocking structure; 31. Valve core; 32. Mesh bag; 4. Air inlet channel; 5. Air inlet pipe; 6. Air outlet channel; 7. Air outlet pipe; 8. Pressure gauge; 9. Flange; 10. Male connector plate; 11. Bolt; 12. Female connector plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1-5 As shown: The filter includes a housing 1. A filter structure 2 and a dust-blocking structure 3 are respectively installed on the left and right sides of the inner cavity of the housing 1. Female mating plates 12 are fixedly installed on the outer wall of the housing 1 near the left and right sides. Male mating plates 10 are installed on the opposite side of the two female mating plates 12. An air inlet channel 4 and an air outlet channel 6 are respectively installed on the two male mating plates 10. The air inlet channel 4 and the air outlet channel 6 are adjacent to the filter structure 2 and the dust-blocking structure 3, respectively. A flange 9 is installed on the opposite side of the air inlet channel 4 and the air outlet channel 6. An air inlet pipe 5 and an air outlet pipe 7 are respectively mated and installed on the two flanges 9. The air inlet pipe 5 is connected to the air inlet channel 4, and the air outlet pipe 7 is connected to the air outlet channel 6. Pressure gauges 8 are installed on the outside of the air inlet channel 4 and the air outlet channel 6. Multiple bolts 11 are installed between the two adjacent flanges 9 and between the male mating plates 10 and the female mating plates 12.

[0029] In this embodiment: Specifically, during use, the air inlet pipe 5 is connected to the upstream air source pipeline via flange 9, and the air outlet pipe 7 is connected to the downstream air-using equipment pipeline via flange 9. Compressed air enters the inner cavity of the housing 1 from the air inlet channel 4, first passing through the filter structure 2, where dust particles in the airflow are intercepted; clean air passes through the filter area into the dust-blocking area, and finally exits. The inlet and outlet pressure gauges 8 display the pressure on both sides in real time. When the differential pressure exceeds the set value, it indicates that the filter structure 2 needs to be replaced. When the system stops or back pressure occurs, the dust-blocking structure 3 forms a seal against the valve seat under the action of the pressure difference, preventing back dust from entering the upstream pipeline in reverse.

[0030] In an optional embodiment, the filter structure 2 includes a support step 21, which is formed on the inner wall of the housing 1 near the left side. A groove 22 is formed on the support step 21, and a filter element 23 is installed in the inner cavity of the groove 22. A pressure cap 24 is installed on the outer wall of the support step 21, and a fastener is installed between the pressure cap 24 and the support step 21.

[0031] In this embodiment: Specifically, the support step 21 and the groove 22 serve as the installation space for the filter element 23, and the filter element 23 is fixedly installed with the support step 21 in conjunction with the pressure cap 24 and fasteners, thereby fixing the filter element 23 inside the housing 1 and achieving the effect of filtering gas.

[0032] In an optional embodiment, the dust-blocking structure 3 includes a valve core 31, which is installed on the inner wall of the housing 1 near the right side, and a mesh bag 32 is provided on the right side of the valve core 31. The mesh bag 32 is fixed to the inner wall of the housing 1 by integral welding.

[0033] In this embodiment: Specifically, under the action of forward airflow, the valve core 31 is pushed open by the airflow, allowing air to pass smoothly; under the action of reverse airflow or system shutdown, the valve core 31 is tightly fitted to the valve seat under the action of reverse pressure difference, forming a one-way seal, effectively preventing downstream ash from flowing back to the upstream pipeline. The mesh bag 32 is welded and fixed to the downstream right side of the valve core 31 as a physical limiting structure. When the valve core 31 falls off the valve seat due to long-term aging or airflow erosion, the mesh bag 32 can catch and intercept the fallen valve core 31, preventing it from entering the downstream pipeline with the airflow and causing blockage.

[0034] In an optional embodiment, the filter element 23 is made of L200 type 304 stainless steel.

[0035] In this embodiment: Specifically, the L200 type 304 stainless steel filter element 23 has excellent corrosion resistance and mechanical strength, and is suitable for the filtration of compressed air in industrial pneumatic conveying systems.

[0036] In an optional embodiment, the valve core 31 is a reverse-flow, dust-blocking fluororubber pad.

[0037] In this embodiment: Specifically, the fluororubber pad has good elasticity and temperature resistance, and is suitable for temperatures ranging from -20°C to 200°C, thus adapting to temperature changes in compressed air in industrial pneumatic conveying systems.

[0038] In an optional embodiment, the mesh bag 32 is made of 304 stainless steel.

[0039] In this embodiment: Specifically, the 304 stainless steel mesh bag 32 is fixed to the inner wall of the shell 1 by integral welding, which has the advantages of strong structure, corrosion resistance and airflow erosion resistance.

[0040] In an optional embodiment, the opening size of the mesh 32 is smaller than the outer contour size of the valve core 31.

[0041] In this embodiment: Specifically, through the above design, it is ensured that when the valve core 31 falls off the valve seat, the valve core 31 cannot pass through the mesh of the net bag 32.

[0042] In an optional embodiment, the housing 1 is made of 20# steel.

[0043] In this embodiment: Specifically, 20# steel is a high-quality carbon structural steel with good mechanical and welding properties, and is suitable for the manufacture of industrial pipeline equipment.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter resistor, characterized in that: The system includes a housing (1), with a filter structure (2) and a dust-blocking structure (3) installed on the left and right sides of the inner cavity of the housing (1), respectively. Female connecting plates (12) are fitted and fixedly installed on the left and right sides of the outer wall of the housing (1). Male connecting plates (10) are installed on the opposite side of each of the two female connecting plates (12). An air inlet channel (4) and an air outlet channel (6) are installed on each of the two male connecting plates (10). The air inlet channel (4) and the air outlet channel (6) are adjacent to the filter structure (2) and the dust-blocking structure (3), respectively. Flanges (9) are installed on the opposite side of the air intake channel (4) and the air outlet channel (6). An air intake pipe (5) and an air outlet pipe (7) are respectively installed on the two flanges (9). The air intake pipe (5) is connected to the air intake channel (4), and the air outlet pipe (7) is connected to the air outlet channel (6). Pressure gauges (8) are installed on the outside of the air intake channel (4) and the air outlet channel (6). Multiple bolts (11) are installed between the two adjacent flanges (9) and between the male mating plate (10) and the female mating plate (12).

2. The filter resistor according to claim 1, characterized in that: The filter structure (2) includes a support step (21), which is located on the inner wall of the housing (1) near the left side. A groove (22) is provided on the support step (21), and a filter element (23) is installed in the inner cavity of the groove (22). A pressure cap (24) is installed on the outer wall of the support step (21), and a fastener is installed between the pressure cap (24) and the support step (21).

3. The filter resistor according to claim 1, characterized in that: The dust-blocking structure (3) includes a valve core (31), which is installed on the inner wall of the housing (1) near the right side. A mesh bag (32) is provided on the right side of the valve core (31), and the mesh bag (32) is fixed to the inner wall of the housing (1) by integral welding.

4. The filter resistor according to claim 2, characterized in that: The filter element (23) is made of L200 type 304 stainless steel.

5. The filter resistor according to claim 3, characterized in that: The valve core (31) is a reverse-flow, dust-resistant fluororubber pad.

6. The filter resistor according to claim 3, characterized in that: The net bag (32) is made of 304 stainless steel.

7. The filter resistor according to claim 3, characterized in that: The opening size of the net (32) is smaller than the outer contour size of the valve core (31).

8. The filter resistor according to claim 1, characterized in that: The shell (1) is made of 20# steel.

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