A high-precision LWP flow controller

Abstract

This invention discloses a high-precision LWP flow controller, belonging to the technical field of flow controllers. The invention includes a flow actuator for flow regulation, with an inlet pipe and an outlet pipe connected below the actuator. A flow meter is fixedly installed on the inlet pipe, and a monitoring head is provided at the detection end of the flow meter, located inside the inlet pipe. A filter screen is elastically slidably installed inside the inlet pipe, and a sealing assembly is provided on the inlet pipe. Guide rods are evenly arranged on the filter screen. Through holes are opened at equal angles on the inlet pipe, and an elastic film is fixedly installed in each through hole. A connecting assembly that pushes the elastic film to deform is fixedly connected between the guide rods and the elastic film. An outer pipe is also fixedly installed on the outside of the inlet pipe. This high-precision LWP flow controller can efficiently filter the conveyed medium and achieve self-cleaning through pressure regulation, effectively ensuring monitoring accuracy and achieving high-precision flow regulation.

Description

Technical Field

[0001] This invention relates to the field of flow controller technology, specifically a high-precision LWP flow controller. Background Technology

[0002] In industrial production, precise control of fluid flow is crucial, directly affecting product quality, production efficiency, and energy consumption. Therefore, LWP flow controllers are needed to regulate flow in real time.

[0003] Existing technology (Chinese Patent No. CN118793836B, Publication Date: 2024-10-18) discloses a high-pressure flow automatic control system, belonging to the field of automatic flow control technology. It includes a connecting pipe, two external pipes, and a regulating device. Both ends of the connecting pipe are fixedly connected to connecting pipes. A mounting base is installed on the outer wall of the connecting pipe, and a flow meter for detecting the water flow inside the connecting pipe is installed on the upper surface of the mounting base. A valve for controlling the water flow inside the connecting pipe is installed on the outer wall of the connecting pipe, and a valve stem for controlling the valve is installed on one side of the valve. The regulating device is located on the outer wall of the connecting pipe and includes an electrical control box. This invention achieves water flow regulation through automatic valve control, dynamically adjusting the valve opening as needed to maintain stable flow within a set range. A protective cover protects components such as the motor, improving the service life of components inside the protective cover and allowing for convenient opening and closing of the protective cover for maintenance and repair.

[0004] Existing technology (Chinese patent publication number: CN118088727A, publication date: 2024-05-28) discloses a flow control valve, relating to the field of valve technology. It includes a valve body, an inlet end, and an outlet end. The inlet end and outlet end are fixedly connected to the front and rear sides of the valve body. A control component is fixedly installed on the top of the valve body. A filter component is movably installed inside the inlet end. A connecting branch pipe is fixedly connected to the bottom of the inlet end, and the connecting branch pipe is located in front of the filter component. This invention, through a control component located on the top of the valve body, uses electronic control to control the valve body. This allows for automatic adjustment of the opening angle of the ball valve inside the valve body based on feedback from flow meter data, thereby precisely controlling the flow rate. It also reduces manual labor intensity and facilitates control. The filter component and buffer component can intercept and collect residues, and can be disassembled for cleaning. The operation is simple and convenient, facilitating quick cleaning of residual liquid inside the inlet end.

[0005] While existing flow controllers can filter impurities during use, they are not convenient for automatically cleaning impurities, which can easily lead to clogging of the filter mechanism and require disassembly of the equipment. This makes maintenance work cumbersome and has certain shortcomings. Summary of the Invention

[0006] The purpose of this invention is to provide a high-precision LWP flow controller to solve the problem mentioned in the background art that current flow controllers on the market are inconvenient to automatically clean the filtered impurities, which leads to easy clogging of the filter mechanism and requires disassembly of the equipment, making maintenance work cumbersome.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-precision LWP flow controller, comprising a flow actuator for realizing flow regulation, wherein an inlet pipe and an outlet pipe are connected below the flow actuator, and a flow meter is fixedly installed on the inlet pipe, and a monitoring head is provided at the detection end of the flow meter, and the monitoring head is located inside the inlet pipe.

[0008] A filter screen is elastically slidably installed on the inner side of the inlet pipe, and a sealing assembly is provided on the inlet pipe. Guide rods are evenly arranged on the filter screen. Through holes are opened at equal angles on the inlet pipe, and elastic films are fixedly installed in the through holes. A connecting assembly that pushes the elastic films to deform is fixedly connected between the guide rods and the elastic films. An outer pipe is also fixedly installed on the outer side of the inlet pipe, and a pressure regulating assembly is provided on the outer pipe. A cleaning assembly is installed on the outer side of the monitoring head, and the cleaning assembly is driven by the deformation of the elastic films. A mounting bracket is fixedly installed on the inner side of the inlet pipe, and an adjusting rod is rotatably installed on the inlet pipe through a one-way bearing. A crushing assembly for crushing impurities is provided on the filter screen.

[0009] Preferably, the inlet port of the inlet pipe and the outer pipe are fixedly connected by a flange, and the inlet port of the inlet pipe and the outer pipe are fitted with a clearance, and the filter screen inside the inlet pipe slides elastically under the action of liquid pressure.

[0010] Preferably, the sealing assembly includes an elastic airbag fixedly installed between the inlet pipe and the filter screen, and a first spring is also fixedly connected between the inlet pipe and the filter screen. The outer wall of the inlet pipe is also embedded with a sealing airbag. The elastic airbag and the sealing airbag are connected by a pipe. When the filter screen slides, it squeezes the elastic airbag. After being compressed, the elastic airbag supplies air to the sealing airbag. The inflated sealing airbag fits between the inlet pipe and the outer pipe to achieve a seal.

[0011] Preferably, the connecting assembly includes a connecting rod rotatably mounted on the end of the guide rod, and a colloid connector is fixedly connected between the end of the connecting rod near the elastic film and the elastic film. During the movement of the guide rod, the connecting rod pushes the elastic film to elastically stretch, and during the reset process of the elastic film, it pushes the liquid to flow in the opposite direction.

[0012] Preferably, the pressure regulating assembly includes a pressure regulating pipe fixedly installed on the outer pipe, and the outer pipe and the pressure regulating pipe are connected. A piston plate is slidably connected to the inner side of the pressure regulating pipe, and a pull rod is fixed on the piston plate. The pull rod slides through the end of the pressure regulating pipe, and a second spring is fixedly connected between the pressure regulating pipe and the piston plate.

[0013] Preferably, the cleaning component includes a winding component that is rotatably mounted on the outside of the monitoring head, and a pull rope is wound around the outside of the winding component. The end of the pull rope away from the monitoring head is fixedly connected to the middle position of the elastic film. At the same time, during the deformation and stretching of the elastic film, the pull rope pulls the winding component to rotate elastically.

[0014] Preferably, a scraper is fixedly connected to the outer side of the winding component, and the scraper is attached to the outer side of the monitoring head. During the rotation of the winding component, the scraper removes impurities attached to the outer wall of the monitoring head.

[0015] Preferably, the crushing assembly includes a rotating sleeve that is rotatably mounted through the center of the filter screen, and the rotating sleeve is sleeved on the outside of the adjusting rod. The outside of the adjusting rod is provided with a spiral guide groove. Meanwhile, a ball bearing is embedded in the inner wall of the rotating sleeve. During the sliding adjustment of the rotating sleeve and the adjusting rod, the ball bearing slides along the guide groove to drive the rotating sleeve to rotate.

[0016] Preferably, a cutting blade is uniformly fixed on the outer side of the rotating sleeve, and the cutting blade is attached to the outer side of the filter screen, and the cutting blade cuts the impurities on the filter screen during the rotation process.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the high-precision LWP flow controller can efficiently filter the conveying medium and can achieve self-cleaning through pressure regulation, effectively ensuring monitoring accuracy and realizing high-precision flow control, as detailed below;

[0018] 1. Equipped with a filter screen, elastic airbag and sealing airbag. With the impact of the conveying medium, the filter screen will slide elastically inside the inlet pipe, causing the inlet pipe to squeeze the elastic airbag. This allows some of the gas in the elastic airbag to be transported through the pipe to the sealing airbag, causing the sealing airbag to expand and fit tightly between the inlet pipe and the external pipe, thereby further improving the connection and sealing of the pipeline.

[0019] 2. Equipped with a filter screen and elastic film, when the filter screen is partially clogged, the resistance it experiences increases, thereby pushing the guide rod to move. This causes the connecting rod at the end of the guide rod to push the elastic film to stretch elastically through the colloid connector. When the control medium stops being transported, the elastic film will elastically reset under its own elastic force, thereby promoting the reverse flow of the medium and achieving backflushing of the filter screen.

[0020] 3. It is equipped with a winding component, a pull rope, and a scraper. As the elastic film stretches elastically, it can pull the winding component to rotate elastically through the pull rope. This allows the scraper on the outside of the winding component to fit against the outer wall of the monitoring head and rotate, thereby achieving automatic cleaning of impurities on the outer wall of the monitoring head and ensuring the accuracy of flow detection.

[0021] 4. Equipped with a rotating sleeve, cutting blades, and adjusting rod, the rotating sleeve can drive the adjusting rod to rotate synchronously when the filter screen slides elastically under the impact of the conveying medium. When the filter screen is reset, it can drive the rotating sleeve to rotate automatically, so that the cutting blades on the outside of the rotating sleeve can break down the impurities filtered out on the outside of the filter screen, thus preventing the filter screen from becoming clogged and affecting normal use. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a bottom view of the liquid inlet pipe structure of the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of the inlet pipe of the present invention;

[0025] Figure 4 This is a schematic diagram of the filter installation structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the sealing airbag installation structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the filter screen and the elastic airbag of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is a schematic diagram of the elastic film installation structure of the present invention.

[0030] In the diagram: 1. Flow actuator; 2. Inlet pipe; 3. Drain pipe; 4. Flow meter; 5. Monitoring head; 6. Filter screen; 7. First spring; 8. Elastic airbag; 9. Sealing airbag; 10. Guide rod; 11. Connecting rod; 12. Colloidal connector; 13. Elastic film; 14. Outer tube; 15. Pressure regulating pipe; 16. Piston plate; 17. Pull rod; 18. Second spring; 19. Winding component; 20. Pull rope; 21. Scraper; 22. Rotating sleeve; 23. Cutting blade; 24. Adjusting rod; 25. Guide groove; 26. Ball bearing. Detailed Implementation

[0031] 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.

[0032] Example 1: Existing flow controllers are inconvenient for automatically cleaning the filter media and detection mechanism, resulting in limited detection and control accuracy. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-4 and Figures 6-8 As shown; a high-precision LWP flow controller includes a flow actuator 1 for flow regulation. An inlet pipe 2 and an outlet pipe 3 are connected below the flow actuator 1. A flow meter 4 is fixedly installed on the inlet pipe 2, and a monitoring head 5 is provided at the detection end of the flow meter 4, located inside the inlet pipe 2. A filter screen 6 is elastically slidably installed inside the inlet pipe 2, with guide rods 10 evenly distributed on the filter screen 6. Through holes are opened at equal angles on the inlet pipe 2, and elastic films are fixedly installed in the through holes. 13, and a connecting component for pushing the elastic film 13 to deform is fixedly connected between the guide rod 10 and the elastic film 13. An outer tube 14 is also fixedly installed on the outside of the liquid inlet pipe 2, and a pressure regulating component is provided on the outer tube 14. A cleaning component is installed on the outside of the monitoring head 5, and the cleaning component is driven by the deformation of the elastic film 13. A mounting bracket is fixedly installed on the inside of the liquid inlet pipe 2, and an adjusting rod 24 is rotatably installed on the liquid inlet pipe 2 through a one-way bearing. A crushing component for crushing impurities is provided on the filter screen 6.

[0033] The connecting assembly includes a connecting rod 11 rotatably mounted on the end of the guide rod 10, and a glue connector 12 is fixedly connected between the end of the connecting rod 11 near the elastic film 13 and the elastic film 13. During the movement of the guide rod 10, the connecting rod 11 pushes the elastic film 13 to elastically stretch. During the reset process of the elastic film 13, it pushes the liquid to flow in the opposite direction. The pressure regulating assembly includes a pressure regulating pipe 15 fixedly mounted on the outer tube 14, and the outer tube 14 and the pressure regulating pipe 15 are connected. A piston plate 16 is interference-slidably connected to the inner side of the pressure regulating pipe 15, and a pull rod 17 is fixed on the piston plate 16. The pull rod 17 slides through the end of the pressure regulating pipe 15, and a second spring 18 is fixedly connected between the pressure regulating pipe 15 and the piston plate 16. The cleaning assembly includes a winding component 19 elastically rotatably mounted on the outside of the monitoring head 5, and a pull rope 20 is wound and connected to the outside of the winding component 19. The end of the pull rope 20 away from the monitoring head 5 is fixedly connected to the elastic glue connector. At the center of the sheet 13, during the deformation and stretching process of the elastic sheet 13, the winding member 19 is pulled by the pull rope 20 to rotate elastically. A scraper 21 is fixedly connected to the outside of the winding member 19, and the scraper 21 is attached to the outside of the monitoring head 5. During the rotation of the winding member 19, the scraper 21 scrapes away the impurities attached to the outer wall of the monitoring head 5. The crushing component includes a rotating sleeve 22 that is rotatably installed through the center of the filter screen 6. The rotating sleeve 22 is sleeved on the outside of the adjusting rod 24, and a spiral guide groove 25 is opened on the outside of the adjusting rod 24. Meanwhile, a ball bearing 26 is embedded in the inner wall of the rotating sleeve 22. During the sliding adjustment of the rotating sleeve 22 and the adjusting rod 24, the ball bearing 26 slides along the guide groove 25 to drive the rotating sleeve 22 to rotate. A cutting blade 23 is evenly fixed on the outside of the rotating sleeve 22, and the cutting blade 23 is attached to the outside of the filter screen 6. During the rotation of the cutting blade 23, the impurities on the filter screen 6 are cut.

[0034] The inlet pipe 2 is fixedly connected to the external pipeline via a flange, so that the end fitting of the inlet pipe 2 is inserted into the inner side of the end of the external pipeline. When the medium starts to be transported, the filter screen 6 can filter large particulate impurities in the medium, and the flow meter 4 can monitor the flow rate through the monitoring head 5 and automatically regulate the flow rate through the flow actuator 1. When the filter screen 6 is partially blocked, the medium resistance it experiences will increase, causing the filter screen 6 to slide elastically inside the inlet pipe 2, while pushing the guide rod 10 to move. This causes the connecting rod 11 connected to the end of the guide rod 10 to push the elastic film 13 to stretch elastically through the colloid connector 12. At the same time, the rotating sleeve 22 on the filter screen 6 can drive the adjusting rod 24 to rotate synchronously. The adjusting rod 24 is controlled by the rotation direction through a one-way bearing. When the medium is stopped from being transported, the elastic film 13 will elastically reset under its own elastic force, thus making the elastic film 13 elastically reset. The film 13 promotes the reverse flow of the medium, achieving backflushing of the filter screen 6. At the same time, the ball bearings 26 on the inner wall of the rotating sleeve 22 roll along the guide groove 25, thereby driving the rotating sleeve 22 to rotate. This allows the cutting blades 23 on the outer side of the rotating sleeve 22 to automatically cut the filtered material on the outer side of the filter screen 6, preventing the filter screen 6 from becoming clogged. The elastic stretch of the elastic film 13 allows the pull rope 20 to pull the winding component 19 to rotate elastically, so that the scraper 21 on the outer side of the winding component 19 can fit against the outer wall of the monitoring head 5 and rotate, thereby achieving automatic cleaning of impurities on the outer wall of the monitoring head 5 and ensuring the accuracy of flow detection. By pulling and pushing the lever 17, the piston plate 16 can be driven to slide inside the pressure regulating tube 15, thereby adjusting the air pressure inside the outer tube 14. This air pressure drives the elastic film 13 to perform elastic adjustment, realizing manual unclogging operation and further ensuring the stability of the structure.

[0035] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing flow controllers use a single rubber ring sealing structure, resulting in limited sealing effect and an inability to adaptively adjust the sealing according to the medium delivery pressure. To further solve this technical problem, this example discloses the following technical content: Figure 2 and Figures 5-6As shown; and a sealing assembly is provided on the inlet pipe 2. The inlet port of the inlet pipe 2 and the external pipeline are fixedly connected by a flange, and the inlet port of the inlet pipe 2 and the external pipeline are fitted with a clearance. The filter screen 6 inside the inlet pipe 2 slides elastically under the action of liquid pressure. The sealing assembly includes an elastic airbag 8 fixedly installed between the inlet pipe 2 and the filter screen 6, and a first spring 7 is also fixedly connected between the inlet pipe 2 and the filter screen 6. A sealing airbag 9 is also embedded in the outer wall of the inlet pipe 2. The elastic airbag 8 and the sealing airbag 9 are connected by a pipe. During the sliding process of the filter screen 6, the elastic airbag 8 is squeezed. After being compressed, the elastic airbag 8 delivers air to the sealing airbag 9. The inflated sealing airbag 9 fits between the inlet pipe 2 and the external pipeline to achieve a seal.

[0036] As the conveying medium impacts, the filter screen 6 will elastically slide inside the inlet pipe 2, causing the inlet pipe 2 to squeeze the elastic airbag 8. This causes some of the gas in the elastic airbag 8 to be transported through the pipe to the sealing airbag 9, which in turn causes the sealing airbag 9 to expand and fit tightly between the inlet pipe 2 and the external pipe, thereby further improving the connection sealing of the pipe.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] 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 high-precision LWP flow controller, comprising a flow actuator (1) for flow regulation, wherein an inlet pipe (2) and a drain pipe (3) are connected below the flow actuator (1), and a flow meter (4) is fixedly installed on the inlet pipe (2), and a monitoring head (5) is provided at the detection end of the flow meter (4), and the monitoring head (5) is located inside the inlet pipe (2); Its features are, A filter screen (6) is elastically slidably installed on the inner side of the inlet pipe (2), and a sealing component is provided on the inlet pipe (2). Guide rods (10) are evenly arranged on the filter screen (6). Through holes are opened at equal angles on the inlet pipe (2), and an elastic film (13) is fixedly installed in the through hole. A connecting component that pushes the elastic film (13) to deform is fixedly connected between the guide rod (10) and the elastic film (13). An outer tube (14) is also fixedly installed on the outer side of the inlet pipe (2), and a pressure regulating component is provided on the outer tube (14). A cleaning component is installed on the outer side of the monitoring head (5), and the cleaning component is driven by the deformation of the elastic film (13). A mounting bracket is fixedly installed on the inner side of the inlet pipe (2), and an adjusting rod (24) is rotatably installed on the inlet pipe (2) through a one-way bearing. A crushing component for crushing impurities is provided on the filter screen (6). The connecting assembly includes a connecting rod (11) rotatably mounted on the end of the guide rod (10), and a glue connector (12) is fixedly connected between the end of the connecting rod (11) near the elastic film (13) and the elastic film (13). During the movement of the guide rod (10), the elastic film (13) is pushed to elastically stretch through the connecting rod (11), and the elastic film (13) pushes the liquid to flow in the opposite direction during the reset process. The pressure regulating assembly includes a pressure regulating pipe (15) fixedly installed on the outer pipe (14), and the outer pipe (14) and the pressure regulating pipe (15) are connected. The inner side of the pressure regulating pipe (15) is connected to a piston plate (16) with interference fit. At the same time, a pull rod (17) is fixed on the piston plate (16). The pull rod (17) slides through the end of the pressure regulating pipe (15), and a second spring (18) is fixedly connected between the pressure regulating pipe (15) and the piston plate (16).

2. The high-precision LWP flow controller according to claim 1, characterized in that: The inlet port of the liquid inlet pipe (2) and the external pipeline are fixedly connected by a flange, and the inlet port of the liquid inlet pipe (2) and the external pipeline are fitted with a clearance, and the filter screen (6) inside the liquid inlet pipe (2) slides elastically under the action of liquid pressure.

3. The high-precision LWP flow controller according to claim 2, characterized in that: The sealing assembly includes an elastic airbag (8) fixedly installed between the inlet pipe (2) and the filter screen (6), and a first spring (7) is also fixedly connected between the inlet pipe (2) and the filter screen (6). A sealing airbag (9) is also embedded in the outer wall of the inlet pipe (2). The elastic airbag (8) and the sealing airbag (9) are connected by a pipe. During the sliding process of the filter screen (6), the elastic airbag (8) is squeezed. After being compressed, the elastic airbag (8) supplies air to the sealing airbag (9). The inflated sealing airbag (9) fits between the inlet pipe (2) and the outer pipe to achieve a seal.

4. The high-precision LWP flow controller according to claim 1, characterized in that: The cleaning component includes a winding member (19) that is elastically rotatably mounted on the outside of the monitoring head (5), and a pull rope (20) is wound around the outside of the winding member (19). The end of the pull rope (20) away from the monitoring head (5) is fixedly connected to the middle position of the elastic film (13). At the same time, during the deformation and stretching process of the elastic film (13), the winding member (19) is pulled by the pull rope (20) to rotate elastically.

5. A high-precision LWP flow controller according to claim 4, characterized in that: The outer side of the winding component (19) is fixedly connected to a scraper (21), and the scraper (21) is attached to the outer side of the monitoring head (5). During the rotation of the winding component (19), the scraper (21) scrapes away the impurities attached to the outer wall of the monitoring head (5).

6. The high-precision LWP flow controller according to claim 1, characterized in that: The crushing assembly includes a rotating sleeve (22) that is rotatably mounted through the center of the filter screen (6). The rotating sleeve (22) is sleeved on the outside of the adjusting rod (24), and a spiral guide groove (25) is provided on the outside of the adjusting rod (24). Meanwhile, a ball bearing (26) is embedded in the inner wall of the rotating sleeve (22). During the sliding adjustment of the rotating sleeve (22) and the adjusting rod (24), the ball bearing (26) slides along the guide groove (25) to drive the rotating sleeve (22) to rotate.

7. A high-precision LWP flow controller according to claim 6, characterized in that: Cutting blades (23) are uniformly fixed on the outer side of the rotating sleeve (22), and the cutting blades (23) are attached to the outer side of the filter screen (6), and the cutting blades (23) cut the impurities on the filter screen (6) during the rotation process.

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