A high-efficiency filtration and flow resistance integrated filter

Abstract

The application discloses a high-efficiency filtering and flow resisting integrated filter, and belongs to the technical field of pneumatic conveying pipelines. The high-efficiency filtering and flow resisting integrated filter comprises a one-way valve body and a one-way valve core assembly, the one-way valve core assembly is installed in the one-way valve body, air inlet pipes and air outlet pipes are respectively connected to the two ends of the one-way valve body, and a gas filtering assembly is installed in the air outlet pipe. The one-way valve core assembly and the gas filtering assembly are integrated in the same valve body, the functions of air inlet filtering and ash returning flow resisting are integrated, the pipeline is simplified, space is saved, the insertable gas filtering assembly is adopted, the filter screen can be individually taken out for cleaning and replacement without disassembling the pipeline, maintenance is convenient, pressure gauges are respectively installed on the air inlet pipe and the air outlet pipe, filtering effect visualization is realized, equipment damage caused by untimely blockage discovery is avoided, the supporting frame enhances the stability of the pipeline, the sealing gasket layer and the conical limiting ring improve the sealing and positioning reliability, the filtering effect is stabilized, and the maintenance frequency is reduced.

Description

Technical Field

[0001] This invention relates to the field of pneumatic conveying pipeline technology, and more specifically, to a high-efficiency integrated filter with flow blocking. Background Technology

[0002] In the pilot-operated embolized pneumatic conveying system of thermal power plants, compressed air is used as the conveying power to enter the ash conveying pipeline through the main air intake pipeline and the accompanying air pipeline, pushing the ash material along the pipeline to the ash silo. The main air intake provides the main power for embolized conveying, while the accompanying air assists in the fluidization of the ash material and the replenishment of air along the pipeline. Both require that the compressed air entering the pipeline be clean and free of impurities. Otherwise, impurities will wear down the valve sealing surface, block the pilot valve air passage, damage the step-by-step direct-acting valve and other precision pneumatic components, seriously affecting the reliability and service life of the system. Therefore, the gas in the pipeline needs to be filtered.

[0003] In existing pneumatic conveying systems, air intake filtration and backflow prevention are usually accomplished by two separate devices. The air intake filter is installed on the pipeline to intercept impurity particles in the compressed air, while the check valve is set up separately to prevent ash from flowing back in the conveying pipeline. This functional separation arrangement results in a complex pipeline system, many connection points, and a large space occupation. Moreover, there is a dead corner for ash accumulation in the pipeline between the filter and the check valve. Ash is easy to accumulate in this section when backflow occurs. After long-term accumulation, it affects the airflow capacity, increases the risk of leakage, and increases the workload of daily maintenance.

[0004] Therefore, we have made improvements to this and proposed a high-efficiency integrated filter and flow-blocking filter. Summary of the Invention

[0005] In view of the above-mentioned problems in the existing technology, the purpose of the present invention is to provide a high-efficiency integrated filter and flow blocking filter.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: a high-efficiency integrated filter with flow blocking, comprising a one-way valve body and a one-way valve core assembly, wherein the one-way valve core assembly is installed on a single... Inside the valve body, the two ends of the one-way valve body are respectively connected to an air inlet pipe and an air outlet pipe, and an air filter assembly is installed inside the air outlet pipe; The air filtration assembly includes an insertion port, which is located on the inner wall of the exhaust pipe and extends to the outside and communicates with the outside.

[0007] Preferably, a mounting bracket is inserted into the insertion port, a filter screen is fixedly connected to the inner wall of the mounting bracket, the side wall of the mounting bracket is attached to the inner wall of the exhaust pipe, and an arc-shaped fixing plate is fixedly connected to one side of the mounting bracket, with the inner arc surface of the arc-shaped fixing plate attached to the side wall of the exhaust pipe.

[0008] Preferably, the arc-shaped fixing plate has multiple bolts running through it, and all of the bolts are threaded to the side wall of the exhaust pipe.

[0009] Preferably, the inner wall of the exhaust pipe is fixedly connected to two limiting rings, and the mounting bracket is located between the two limiting rings.

[0010] Preferably, pressure gauges are fixedly installed on the side walls of both the intake pipe and the exhaust pipe.

[0011] Preferably, both the exhaust pipe and the intake pipe have support frames fixedly connected to their side walls.

[0012] Preferably, a sealing gasket is fixedly connected to the inner arc surface of the arc-shaped fixing plate, and the sealing gasket is attached to the side wall of the exhaust pipe.

[0013] Preferably, the sidewall of the limiting ring is tapered.

[0014] Preferably, a handle is fixedly connected to the outer arc surface of the arc-shaped fixing plate.

[0015] Preferably, the ends of the intake pipe and exhaust pipe furthest from the one-way valve body are both fixedly connected to flanges.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention integrates the one-way valve core assembly and the air filter assembly into the same one-way valve body, realizing the integration of dual functions of air intake filtration and ash return flow obstruction, significantly simplifying the pipeline system, reducing leakage risk, and saving installation space.

[0017] 2. The present invention provides a structure for an insertable air filter assembly in the exhaust pipe, wherein the filter screen is inserted... The filter assembly is installed inside the exhaust pipe in the form of a mounting bracket and is detachably fixed using an arc-shaped fixing plate and bolts. This allows the filter assembly to be pulled out separately for cleaning and replacement without disassembling the entire pipeline, significantly improving the convenience of maintenance and repair.

[0018] 3. This invention installs pressure gauges on the intake and exhaust pipes respectively, which can intuitively monitor the pressure changes before and after the filter, help determine the filter blockage status, and realize real-time visualization of the filtration effect. This allows operators to quickly grasp the true working condition of the filter without disassembly and inspection, avoiding the drop in air pressure and equipment damage caused by the failure to detect blockage in time.

[0019] 4. The present invention enhances the stability of pipeline installation by setting a support frame, and the sealing gasket and conical limiting ring help improve the reliability of sealing and positioning, effectively preventing airflow leakage and filter assembly installation misalignment, ensuring stable filtration effect and reducing the frequency of maintenance caused by loosening and air leakage. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the main structure of a high-efficiency filter-blocking integrated filter provided in this application; Figure 2 is a schematic diagram of the main structure of a high-efficiency filter-blocking integrated filter provided in this application from another perspective; Figure 3 is a structural cross-sectional view of a high-efficiency filter-blocking integrated filter provided in this application; Figure 4 is a schematic diagram of the filter assembly structure of a high-efficiency filter and flow-blocking integrated filter provided in this application; Figure 5 is a schematic diagram of the sealing gasket structure of a high-efficiency filter with integrated flow blocking provided in this application; Figure 6 is a schematic diagram of the limiting ring structure of a high-efficiency filter with integrated flow blocking provided in this application.

[0021] In the diagram: 1. One-way valve body; 2. One-way valve core assembly; 3. Inlet pipe; 4. Exhaust pipe; 5. Air filter assembly; 501. Insertion port; 502. Mounting bracket; 503. Filter screen; 504. Arc-shaped fixing plate; 505. Bolts; 506; limit ring; 6. pressure gauge; 7. support frame; 8. sealing gasket; 9. handle; 10. flange. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0023] Please refer to Figure 1- Figure 6 As shown, the present invention provides a technical solution: a high-efficiency filter with integrated flow blocking, including a one-way valve body 1 and a one-way valve core assembly 2. The one-way valve core assembly 2 is installed inside the one-way valve body 1. The two ends of the one-way valve body 1 are respectively connected to an air inlet pipe 3 and an exhaust pipe 4. A filter assembly 5 is installed inside the exhaust pipe 4. The air filter assembly 5 includes an insertion port 501, which is located on the inner wall of the exhaust pipe 4 and extends to the outside and communicates with the outside.

[0024] Furthermore, the one-way valve body 1 is used to accommodate the one-way valve core assembly 2 and connect the inlet pipe 3 and the exhaust pipe 4 to form a through airflow channel. The one-way valve core assembly 2 is installed inside the one-way valve body 1. It automatically opens when the airflow is in the forward direction and automatically closes when the airflow is in the reverse direction to prevent ash from flowing back and damaging the upstream equipment. The inlet pipe 3 serves as the air source inlet to introduce compressed air into the one-way valve body 1 to ensure smooth airflow into the system. The exhaust pipe 4 delivers the filtered clean gas to the downstream pipeline and provides installation space for the filter assembly 5. The filter assembly 5 includes an insertion port 501, which is opened on the inner wall of the exhaust pipe 4 and extends to the outside to communicate with the outside. It is used to provide a channel for inserting and removing the filter element, so that the filter element can be replaced online without disassembling the pipeline.

[0025] The one-way valve core assembly 2 is existing technology, and its core function is to allow the medium to flow in the forward direction in the pipeline. The automatic backflow prevention mechanism includes a cone core, a spring, and a seal. When the forward airflow pressure is sufficient to overcome the spring's preload, the airflow pushes open the valve core, allowing the valve to open and conduct. When the airflow reverses and the upstream pressure disappears, the fluid's reverse pressure, together with the spring force, presses the cone core tightly back onto the valve seat, thereby automatically closing and cutting off the airflow passage. This effectively prevents backflow of the medium and the occurrence of ash return. Further details will not be elaborated here.

[0026] In the preferred embodiment of this technical solution, please refer to Figure 4 and Figure 5 As shown, a mounting bracket 502 is inserted into the insertion port 501. A filter screen 503 is fixedly connected to the inner wall of the mounting bracket 502. The side wall of the mounting bracket 502 is attached to the inner wall of the exhaust pipe 4. An arc-shaped fixing plate 504 is fixedly connected to one side of the mounting bracket 502. The inner arc surface of the arc-shaped fixing plate 504 is attached to the side wall of the exhaust pipe 4.

[0027] Furthermore, after the mounting bracket 502 is inserted into the insertion port 501, its side wall is attached to the inner wall of the exhaust pipe 4 to support the filter screen 503 and achieve an overall detachable structure. The filter screen 503 is fixedly connected to the inner wall of the mounting bracket 502 to intercept impurity particles in the airflow and ensure the cleanliness of the downstream gas. The arc-shaped fixing plate 504 is fixedly connected to one side of the mounting bracket 502 to limit the insertion depth of the mounting bracket 502 and provide an external operating point. The inner arc surface of the arc-shaped fixing plate 504 is attached to the side wall of the exhaust pipe 4 to enhance the tightness of the fit between the mounting bracket 502 and the exhaust pipe 4 and prevent airflow from leaking from the insertion port 501.

[0028] In the preferred embodiment of this technical solution, please refer to Figure 4 and Figure 5As shown, multiple bolts 505 pass through the arc-shaped fixing plate 504, and all of the bolts 505 are threaded to the side wall of the exhaust pipe 4.

[0029] Furthermore, multiple bolts 505 are threaded onto the side wall of the exhaust pipe 4. After passing through the arc-shaped fixing plate 504, the bolts 505 are screwed into the side wall of the exhaust pipe 4 to press and fix the arc-shaped fixing plate 504 onto the exhaust pipe 4, preventing the mounting bracket 502 from exiting the insertion port 501 under the impact of airflow. The arc-shaped fixing plate 504 is attached to the side wall of the exhaust pipe 4 by the tightening force of the bolts 505, which is used to evenly distribute the locking pressure and avoid local stress concentration that could cause deformation of the exhaust pipe 4.

[0030] In the preferred embodiment of this technical solution, please refer to Figure 3 As shown, the inner wall of exhaust pipe 4 is fixed. There are two limiting rings 506 connected, and the mounting bracket 502 is located between the two limiting rings 506.

[0031] Furthermore, two limiting rings 506 are fixedly connected to the inner wall of the exhaust pipe 4 to limit the installation position of the mounting bracket 502 in the axial direction of the exhaust pipe 4, preventing it from moving back and forth during use. The mounting bracket 502 is located between the two limiting rings 506 to ensure that the filter screen 503 is always aligned with the center of the airflow channel, avoiding filter area loss and airflow short circuit due to installation misalignment.

[0032] In the preferred embodiment of this invention, as shown in Figure 1, pressure gauges 6 are fixedly installed on the side walls of both the intake pipe 3 and the exhaust pipe 4.

[0033] Furthermore, the pressure gauge 6 on the intake pipe 3 is used to detect the intake pressure at the front end of the filter 503 and provide a reference value for the pre-filter pressure. The pressure gauge 6 on the exhaust pipe 4 is used to detect the exhaust pressure at the rear end of the filter 503 and provide a reference value for the post-filter pressure. The two pressure gauges 6 are fixed to the side walls of the intake pipe 3 and the exhaust pipe 4 respectively. By comparing the two readings, the degree of blockage of the filter 503 can be intuitively judged, so as to avoid the air source pressure drop and equipment damage caused by the blockage not being detected in time.

[0034] In the preferred embodiment of this invention, as shown in Figure 1, both the exhaust pipe 4 and the intake pipe 3 are fixedly connected to the side walls of a support frame 7.

[0035] Furthermore, the support frame 7 fixedly connected to the side wall of the intake pipe 3 is used to support the intake pipe 3 and share the weight of the pipeline, reducing the impact of vibration on the one-way valve body 1 and the connection. The support frame 7 fixedly connected to the side wall of the exhaust pipe 4 is used to support the exhaust pipe 4 and offset the additional load generated by airflow pulsation, preventing the pipeline from loosening of joints and failure of seals due to long-term suspended stress.

[0036] In the preferred embodiment of this technical solution, please refer to Figure 5 As shown, a sealing gasket 8 is fixedly connected to the inner arc surface of the arc-shaped fixing plate 504, and the sealing gasket 8 is attached to the side wall of the exhaust pipe 4.

[0037] Furthermore, the sealing gasket 8 is fixedly connected to the inner arc surface of the arc-shaped fixing plate 504 to fill the microscopic gap between the arc-shaped fixing plate 504 and the side wall of the exhaust pipe 4, preventing airflow from leaking outward from the insertion port 501. The sealing gasket 8 adheres to the side wall of the exhaust pipe 4 and is compressed when the bolt 505 is tightened. It forms an elastic seal to compensate for the relative displacement of the mating surfaces caused by temperature changes and vibration.

[0038] In the preferred embodiment of this technical solution, please refer to Figure 6 As shown, the sidewall of the limiting ring 506 is tapered.

[0039] Furthermore, the conical sidewall of the limiting ring 506 faces the direction of the gas flow to guide the airflow smoothly and reduce the local resistance loss when the airflow passes through. The conical structure avoids the formation of right-angle steps on the inner wall of the exhaust pipe 4, preventing dust from accumulating at the steps and forming a flow dead zone. While ensuring the positioning function, it does not affect the effective cross-sectional area of ​​the airflow channel.

[0040] In the preferred embodiment of this technical solution, please refer to Figure 2 As shown, the outer arc surface of the arc-shaped fixing plate 504 is fixedly connected with a handle 9.

[0041] Furthermore, the handle 9 is fixedly connected to the outer arc surface of the arc-shaped fixing plate 504 to provide the operator with a hand gripping point, making it easy to pull out and insert the mounting bracket 502 from the insertion port 501.

[0042] In the preferred embodiment of this invention, as shown in Figure 1, the ends of the intake pipe 3 and the exhaust pipe 4 away from the one-way valve body 1 are both fixedly connected to flanges 10.

[0043] Furthermore, the flange 10 fixedly connected to the end of the intake pipe 3 away from the one-way valve body 1 is used to achieve a tight connection with the upstream air source pipeline, ensuring reliable sealing at the intake end and facilitating overall disassembly and assembly.

[0044] Working principle: Compressed air enters the one-way valve body 1 from the inlet pipe 3. Under the action of positive airflow pressure, the one-way valve core assembly 2 opens, and the airflow enters the exhaust pipe 4. Then the airflow flows through the air filter assembly 5 installed inside the exhaust pipe 4. The airflow passes through the filter screen 503 fixed in the mounting bracket 502. Impurities are intercepted, and clean gas is sent out from the outlet of the exhaust pipe 4. When backflow and reverse airflow occur, the one-way valve core assembly 2 automatically closes to prevent ash from flowing back to the upstream pipeline. During equipment operation, pressure gauges 6 installed on the inlet pipe 3 and exhaust pipe 4 display the pre-filter and post-filter pressures, respectively. Operators compare the readings to determine the clogging status of the filter screen 503. When maintenance is required, loosen the bolts 505 on the arc-shaped fixing plate 504 and use the handle 9 to remove the mounting bracket 502 from the insertion point. The filter screen 503 can be cleaned and replaced by pulling it out of the port 501. Then, the cleaned filter screen 503 is put into the insertion port 501, and the mounting bracket 502 is inserted between the two limiting rings 506. Reliable positioning and sealing are achieved by relying on the sealing gasket layer 8 and the conical sidewall of the limiting ring 506.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0046] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A high-efficiency integrated filter for filtering and flow blocking, comprising a one-way valve body (1) and a one-way valve core assembly (2), wherein the one-way valve core assembly (2) is installed inside the one-way valve body (1), characterized in that, The one-way valve body (1) is connected to an air inlet pipe (3) and an exhaust pipe (4) at both ends, and an air filter assembly (5) is installed inside the exhaust pipe (4). The air filter assembly (5) includes an insertion port (501) which is located on the inner wall of the exhaust pipe (4) and extends to the outside and communicates with the outside.

2. The high-efficiency integrated filter and flow-blocking filter according to claim 1, characterized in that, An installation bracket (502) is inserted into the insertion port (501). A filter screen (503) is fixedly connected to the inner wall of the installation bracket (502). The side wall of the installation bracket (502) is attached to the inner wall of the exhaust pipe (4). An arc-shaped fixing plate (504) is fixedly connected to one side of the installation bracket (502). The inner arc surface of the arc-shaped fixing plate (504) is attached to the side wall of the exhaust pipe (4).

3. The high-efficiency integrated filter and flow-blocking filter according to claim 2, characterized in that, Multiple bolts (505) are threaded through the arc-shaped fixing plate (504), and all of the bolts (505) are threaded to the side wall of the exhaust pipe (4).

4. The high-efficiency integrated filter and flow-blocking filter according to claim 2, characterized in that, The inner wall of the exhaust pipe (4) is fixedly connected to two limiting rings (506), and the mounting bracket (502) is located between the two limiting rings (506).

5. The high-efficiency integrated filter and flow-blocking filter according to claim 1, characterized in that, Pressure gauges (6) are fixedly installed on the side walls of both the intake pipe (3) and the exhaust pipe (4).

6. The high-efficiency integrated filter and flow-blocking filter according to claim 1, characterized in that, The exhaust pipe (4) and the intake pipe (3) are both fixedly connected to the side walls of the support frame (7).

7. The high-efficiency integrated filter and flow-blocking filter according to claim 2, characterized in that, The inner arc surface of the arc-shaped fixing plate (504) is fixedly connected with a sealing gasket layer (8), which is attached to the side wall of the exhaust pipe (4).

8. The high-efficiency integrated filter and flow-blocking filter according to claim 4, characterized in that, The sidewall of the limiting ring (506) is tapered.

9. A high-efficiency integrated filter and flow-blocking filter according to claim 2, characterized in that, The outer arc surface of the arc-shaped fixing plate (504) is fixedly connected to a handle (9).

10. A high-efficiency integrated filter and flow-blocking filter according to claim 1, characterized in that, The intake pipe (3) and exhaust pipe (4) are both fixedly connected to flanges (10) at the ends away from the one-way valve body (1).

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