Pneumatic conveying system with blockage response testing function

Abstract

The pneumatic conveying system with blockage response testing function can simulate blockage conditions in the main conveying pipe through an innovative blockage response testing mechanism. When the valve core rotates to the blocked position of the main conveying pipe, the first contact plate contacts the second contact plate, and the second pressure sensor is energized to accurately acquire the pressure data at that location. Combined with the first pressure sensors installed on each pneumatic conveyor, the system can monitor the pressure status at different locations throughout the entire conveying pipeline in real time. These pressure data are centrally displayed and analyzed via a touchscreen and a host computer. Once an abnormal pressure is detected, the corresponding pneumatic conveyor can be quickly located, and its damage can be accurately determined. Compared to the traditional segmented pressure testing method, this significantly improves detection efficiency, reduces maintenance time, effectively enhances material transportation efficiency, and reduces production losses caused by equipment failure.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying device technology, specifically a pneumatic conveying system with a blockage response testing function. Background Technology

[0002] Pneumatic conveying technology, as a core means of achieving green, safe, and efficient conveying of bulk materials in modern industry, has been widely applied in more than 30 industries, including power, chemical, building materials, metallurgy, and food processing. Its core principle is to achieve continuous material conveying by forming a gas-solid two-phase flow through compressed air or inert gas in a closed pipeline. To prevent blockages during pipeline transport, a high-pressure gas purging valve is typically installed between the material conveying pipeline and the compressed air pipeline as a pneumatic conveyor to purge the material conveying pipeline and resolve blockages. After long-term use, damage to the pneumatic conveyor can affect normal material conveying. Identifying and repairing damaged pneumatic conveyors in traditional systems is complex, generally requiring pressure testing segment by segment along the pipeline. This is not only labor-intensive and time-consuming, but also reduces material transport efficiency to some extent. Summary of the Invention

[0003] The purpose of this invention is to provide a pneumatic conveying system with a blockage response test function. It can simulate blockage conditions through a blockage response test mechanism and display the pressure values ​​of each pneumatic conveyor in real time through a touch screen and a host computer. It can quickly identify damaged pneumatic conveyors and solve the problems in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a pneumatic conveying system with a blockage response test function, including a hopper, several main conveying pipes installed on the inlet of the hopper, several interconnected branch conveying pipes installed on each main conveying pipe, compressed air pipes provided on one side of the branch conveying pipes and the main conveying pipes, several interconnected pneumatic conveyors installed between the compressed air pipes and the branch conveying pipes, and between the compressed air pipes and the main conveying pipes, the pneumatic conveyors can automatically open to blow out the blockage when the main conveying pipes or branch conveying pipes are blocked, each pneumatic conveyor is equipped with a first pressure sensor, the first pressure sensor is connected to a touch screen through a control line, the touch screen is connected to a host computer through a control line, and at the end of each main conveying pipe near the hopper, The system is equipped with a blockage response testing mechanism. Each mechanism includes a valve seat mounted on the main conveying pipe. A rotatable valve core is fitted inside the valve seat. The valve core has a through hole communicating with the main conveying pipe. A second pressure sensor is mounted on one side of the valve core, and the second pressure sensor has a first contact piece. A second contact piece is located on the inner wall of the valve seat, contacting the first contact piece. When the first and second contact pieces contact each other, the second pressure sensor is energized. When the valve core rotates to fully penetrate the main conveying pipe on both sides, the first and second contact pieces disengage. When the valve core rotates to block the main conveying pipe on both sides, the first and second contact pieces contact each other. The second pressure sensor is connected to a touchscreen via control circuitry. A shaft is mounted on the valve core, and a sealing cover is mounted on the valve seat. The sealing cover has a hole that mates with the shaft. A test handle is located at the end of the shaft that extends beyond the sealing cover. A first sealing ring is installed at the connection point between the valve seat and the main conveying pipe, and a second sealing ring is installed between the shaft and the sealing cover. A position sensor is installed inside the valve seat. When the valve core rotates to completely block the main conveying pipes on both sides, the second pressure sensor can be detected by the position sensor. The position sensor is connected to the touch screen and the host computer via control lines. A pressure relief valve mechanism is installed on the feed pipe of the blocking response testing mechanism. The pressure relief valve mechanism includes a valve body connected to the main conveying pipe. A limit ring is provided inside the valve body. A screen is installed on the upper side of the limit ring. A blocking ball is installed in the valve body below the limit ring by a spring. The spring always tends to push the blocking ball to block the limit ring. The end of the valve body is connected to the discharge pipe of the blocking response testing mechanism via a pipeline. The conveying branch pipe is equipped with several material discharge unit structures, each of which includes a hopper. A manual feed valve is installed at the discharge port at the bottom of the hopper. A pneumatic feed valve is installed at the outlet of the manual feed valve through a telescopic pipe. A silo pump is installed between the outlet of the pneumatic feed valve and the conveying branch pipe. A level gauge is installed on the silo pump. An exhaust valve is installed between the silo pump and the hopper.

[0005] The positive effects of this utility model are as follows: The pneumatic conveying system with a blockage response testing function described in this utility model can simulate the blockage condition of the conveying main pipe through an innovative blockage response testing mechanism. When the valve core rotates to the blockage position of the conveying main pipe, the first contact piece contacts the second contact piece, and the second pressure sensor is energized to accurately acquire the pressure data at that position. Combined with the first pressure sensors installed on each pneumatic conveyor, the pressure status at different positions of the entire conveying pipeline can be monitored in real time. These pressure data are centrally displayed and analyzed through a touch screen and a host computer. Once an abnormal pressure is detected, the corresponding pneumatic conveyor can be quickly located, and its damage can be accurately determined. Compared with the traditional segmented pressure testing method, this greatly improves the detection efficiency, reduces maintenance time, effectively improves the material transportation efficiency, and reduces production losses caused by equipment failure. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view of part of I; Figure 3 yes Figure 2 A magnified view of part II; Figure 4 This is a side half-sectional view of the blocking response test mechanism; Figure 5 This is a top-down half-sectional view of the blocking response test facility; Figure 6 yes Figure 5 A schematic diagram showing the valve core of the medium structure rotating to block the two main material conveying pipes on both sides; Figure 7 This is a schematic diagram of the pressure relief valve mechanism; Figure 8 yes Figure 5 A partial sectional isometric view of the structural state; Figure 9 yes Figure 6 A partial sectional isometric view of the structural state; Figure 10 This is a circuit connection diagram of this utility model. Detailed Implementation

[0007] The pneumatic conveying system with a blockage response testing function described in this utility model, such as Figure 1-3As shown, it includes a silo 1, which is used to hold and convey materials. Several main conveying pipes 2 are installed on the inlet of the silo 1. Several connected branch conveying pipes 3 are installed on each main conveying pipe 2. Compressed air pipes 4 are provided on one side of the branch conveying pipes 3 and the main conveying pipes 2. Several connected pneumatic conveyors 5 are installed between the compressed air pipes 4 and the branch conveying pipes 3, and between the compressed air pipes 4 and the main conveying pipes 2.

[0008] The pneumatic conveyor 5 can be the pneumatic conveyor disclosed in Chinese Patent No. CN201410722905.X, which can automatically open to purge blockages when the main conveying pipe 2 or the branch conveying pipe 3 becomes blocked, and automatically close after purging. No control elements are needed during the opening and closing of its internal valves, and the pressure during valve opening and closing can be adjusted as needed, thereby improving the reliability of the pneumatic conveying system and reducing production costs.

[0009] To achieve real-time pressure monitoring of the pneumatic conveyors 5, each pneumatic conveyor 5 is equipped with a first pressure sensor 6. The first pressure sensor 6 is connected to a touchscreen 7 via a control line, and the touchscreen 7 is connected to a host computer 8 via a control line. The first pressure sensor 6 can be an existing MS5540C pneumatic pressure sensor. The signal output terminal of the first pressure sensor 6 is connected to the signal input terminal of the touchscreen 7 via an information transmission wire. The signal output terminal of the touchscreen 7 is connected to the signal input terminal of the host computer 8 via an information transmission wire. Through this connection structure, the real-time pressure values ​​of all pneumatic conveyors 5 can be summarized and displayed on the touchscreen 7 and the host computer 8 for operators to view, compare, or troubleshoot.

[0010] To simulate blockages in the pipeline during maintenance, a blockage response testing mechanism is installed at the end of each main material conveying pipe 2 near the hopper 1, such as... Figure 4-6 As shown, each blockage response test mechanism includes a valve seat 9 installed on the conveying main pipe 2. A valve core 10 that can be rotated to open and close is installed in the valve seat 9. A through hole 11 connected to the conveying main pipe 2 is opened in the valve core 10. When the valve core 10 rotates, the position of the through hole 11 can be used to adjust the opening and closing of the conveying main pipes 2 on both sides.

[0011] A second pressure sensor 12 is installed on the valve core 10 on one side of the through hole 11. The second pressure sensor 12 has a first contact piece 13, and a second contact piece 14 is provided on the inner wall of the valve seat 9 to contact the first contact piece 13. After the first contact piece 13 and the second contact piece 14 contact each other, the second pressure sensor 12 is energized and works. When the valve core 10 rotates to the point where the through hole 11 completely passes through the conveying main pipes 2 on both sides, the first contact piece 13 and the second contact piece 14 disengage, and the second pressure sensor 12 is de-energized and in a non-working state. When the valve core 10 rotates to the point where it blocks the conveying main pipes 2 on both sides, the first contact piece 13 and the second contact piece 14 contact each other, and the second pressure sensor 12 is in a working state, which can simulate the blockage situation in the conveying pipe and detect the air pressure change at the blockage location.

[0012] The second pressure sensor 12 can be an existing MSP300 pressure sensor, whose signal output interface is connected to the signal input of the touch screen 7 via an information feeder. When the pneumatic conveying system needs maintenance, rotate the valve core 10 to block the conveying main pipes 2 on both sides, and check the air pressure changes of each pneumatic conveyor 5 on the touch screen 7 or the host computer 8. The magnitude and value of the air pressure changes are used to determine whether damage has occurred. The blockage response testing mechanism can also be installed at other locations prone to blockage, such as the conveying main pipe 2 or the conveying branch pipe 3, to quickly identify the pressure values ​​of the pneumatic conveyors 5 at different locations and quickly detect damaged pneumatic conveyors 5.

[0013] Furthermore, to facilitate the rotational opening and closing operation of the valve core 10, a shaft 15 is installed on the valve core 10, and a sealing cover 16 is installed on the valve seat 9. The sealing cover 16 has a hole that mates with the shaft 15. A test handle 17 is provided at one end of the shaft 15 that extends out of the sealing cover 16. The operator only needs to rotate the test handle 17 to easily control the rotation of the valve core 10 within the valve seat 9, thereby realizing the opening and closing operation of the material conveying main pipe 2 and simulating a blockage. This manual operation method is simple and intuitive, requiring no complex electrical control, thus reducing the difficulty of operation and equipment costs.

[0014] A first sealing ring 18 is installed at the connection point between the valve seat 9 and the main conveying pipe 2, and a second sealing ring 19 is installed between the shaft 15 and the sealing cover 16. The above-mentioned sealing rings ensure the sealing performance during the test, prevent material leakage, ensure the accuracy and reliability of the test, and avoid test errors and environmental impact caused by poor sealing.

[0015] When the valve core 10 rotates to the closed state, in order to identify and maintain this state to simulate the blockage in the pipeline, a position sensor 20 is installed in the valve seat 9. When the valve core 10 rotates to completely block the two conveying main pipes 2, the second pressure sensor 12 can be detected by the position sensor 20. The position sensor 20 is connected to the touch screen 7 and the host computer 8 through the control line.

[0016] Once position sensor 20 detects the position of the second pressure sensor 12, indicating that the pipeline is blocked, position sensor 20 sends an electrical signal to touch screen 7 and host computer 8. At this moment, timing is started and pressure changes of all pneumatic conveyors 5 are monitored. Position sensor 20 can be an existing model EKMB1201113 sensor, and its signal output is connected to the signal input of touch screen 7 and host computer 8 via an information transmission line.

[0017] The position sensor 20 provides strong support for the intelligent control of the system. When the valve core 10 rotates to completely block the two conveying main pipes 2, the position sensor 20 can accurately detect the second pressure sensor 12 and transmit the signal to the touch screen 7 and the host computer 8. This allows operators to not only obtain pressure data but also understand the working status of the blockage response testing mechanism in real time, i.e., whether the valve core 10 is in the correct blocking position. Through this intelligent position detection and status feedback mechanism, the reliability and stability of the system are further improved, ensuring that the testing process is carried out accurately according to the preset requirements, and providing more comprehensive information for fault diagnosis and equipment maintenance.

[0018] Furthermore, a pressure relief valve mechanism is installed on the feed pipe of the blocking response testing mechanism, such as... Figure 7 As shown, the pressure relief valve mechanism includes a valve body 21 connected to the main conveying pipe 2. A limiting ring 22 is provided inside the valve body 21. A screen 23 is installed on the upper side of the limiting ring 22. A blocking ball 25 is installed inside the valve body 21 below the limiting ring 22 by means of a spring 24. The spring 24 always tends to push the blocking ball 25 to block the limiting ring 22. The end of the valve body 21 is connected to the discharge pipe of the blockage response test mechanism through a pipeline.

[0019] The pressure relief valve mechanism installed between the inlet and outlet pipes of the blockage response testing mechanism provides reliable safety assurance for the system. During simulated blockage operation, if the pressure inside the pipeline abnormally increases due to blockage or other reasons, the gas pressure can overcome the elastic force of the spring 24, pushing the sealing ball 25 downwards. This allows the gas to be discharged through the screen 23 and the pipeline connected to the compressed gas pipeline 4 at the end of the valve body 21, thus achieving the pressure relief function. The screen 23 effectively prevents material from entering the pressure relief valve mechanism, avoiding blockage and damage, and ensuring the normal operation of the pressure relief valve. This comprehensive pressure relief protection mechanism effectively prevents pipeline rupture and other safety accidents caused by excessive pressure, ensuring the safety of equipment and personnel.

[0020] Furthermore, the conveying branch pipe 3 is equipped with several material discharge unit structures, each of which includes a hopper 26. A manual feed valve 27 is installed at the discharge port at the bottom of the hopper 26. A pneumatic feed valve 29 is installed at the outlet of the manual feed valve 27 through a telescopic pipe 28. A silo pump 30 is installed between the outlet of the pneumatic feed valve 29 and the conveying branch pipe 3. A level gauge 31 is provided on the silo pump 30. An exhaust valve 32 is installed between the silo pump 30 and the hopper 26.

[0021] The material feeding unit structure installed on the conveying branch pipe 3 enables precise control of material feeding. The combined use of the manual feed valve 27 and pneumatic feed valve 29 at the bottom of the hopper 26 allows operators to flexibly control the amount and timing of material input according to actual production needs. The manual feed valve 27 facilitates initial adjustment of the material flow rate, while the pneumatic feed valve 29 enables rapid and accurate opening and closing operations, improving the automation level of material feeding. The level gauge 31 installed on the silo pump 30 can monitor the material level within the silo pump 30 in real time. When the level reaches the set value, it can promptly trigger subsequent conveying operations, preventing the silo pump 30 from overloading or running empty, thus improving the efficiency and stability of material conveying. Simultaneously, the exhaust valve 32 installed between the silo pump 30 and the hopper 26 can expel air from the silo pump 30, reducing air resistance during material conveying and further optimizing the material conveying process.

[0022] Furthermore, every thirty first pressure sensors 6 are connected to pressure collectors 33 via control lines, and each pressure collector 33 is connected to a touchscreen 7 via a control line. Flow sensors 34 are also installed on the feed branch pipe 3 and the feed main pipe 2, and the flow sensors 34 are connected to the touchscreen 7 and the host computer 8 via control lines. The pressure collector 33 can be an existing pressure recorder model HS-610. The information transmission line of the first pressure sensor 6 is connected to the signal input terminal of the pressure collector 33, and the signal output terminal of the pressure collector 33 is connected to the signal input terminal of the touchscreen 7 via an information transmission line. The signal output terminal of the flow sensor 34 can be connected to the signal input terminals of the touchscreen 7 and the host computer 8 via information transmission lines.

[0023] The design of connecting every thirty pressure sensors 6 to the touchscreen 7 via pressure collector 33 enables centralized acquisition and transmission of pressure data. This centralized data acquisition method reduces the complexity of wiring connections and signal transmission, improving system reliability and stability. Simultaneously, the combined use of the touchscreen 7 and the host computer 8 provides operators with an intuitive and convenient interface. Operators can view real-time operating data from various pressure sensors, flow sensors, and other devices on the touchscreen 7, and perform parameter settings and fault diagnosis. The host computer 8 can further analyze and process this data, generating reports and trend charts to provide decision-making support for equipment maintenance and production management, achieving intelligent management and optimized system operation.

[0024] This pneumatic conveying system has wide applicability and can be applied to various industries such as power, chemical, building materials, metallurgy, and food processing. Its modular design allows for flexible combination and adjustment of components according to different production needs, adapting to varying material characteristics, conveying distances, and conveying volumes. Furthermore, the system exhibits excellent compatibility with existing compressed air or inert gas supply systems, eliminating the need for large-scale modifications to existing gas source equipment, thus reducing system modification costs and implementation difficulty, and facilitating its promotion and application in existing industrial production environments. In summary, this pneumatic conveying system with a blockage response testing function, through a series of innovative designs and optimization measures, has achieved significant positive results in blockage detection, pneumatic conveyor status identification, safety protection, material conveying control, and data acquisition and management. It effectively improves the reliability, stability, and intelligence level of pneumatic conveying systems, providing a more efficient and safer solution for bulk material conveying in modern industrial production.

[0025] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A pneumatic conveying system with a blockage response testing function, characterized in that: The system includes a silo (1), with several main conveying pipes (2) installed at the inlet of the silo (1). Several interconnected branch conveying pipes (3) are installed on each main conveying pipe (2). Compressed air pipes (4) are provided on one side of the branch conveying pipes (3) and the main conveying pipes (2). Several interconnected pneumatic conveyors (5) are installed between the compressed air pipes (4) and the branch conveying pipes (3), and between the compressed air pipes (4) and the main conveying pipes (2). The pneumatic conveyors (5) can automatically open to blow out blockages when blockages occur in the main conveying pipes (2) and the branch conveying pipes (3). Each pneumatic conveyor (5) is equipped with a first pressure sensor (6). The first pressure sensor (6) is connected to the touch screen (7) through a control line. The touch screen (7) is connected to the host computer (8) through a control line. A blockage response testing mechanism is installed at the end of each main conveying pipe (2) near the silo (1). Each blockage response testing mechanism includes a valve installed on the main conveying pipe (2). A valve core (10) capable of being rotated and opened / closed is installed inside the valve seat (9). A through hole (11) communicating with the main conveying pipe (2) is opened inside the valve core (10). A second pressure sensor (12) is installed on the valve core (10) on one side of the through hole (11). A first contact piece (13) is provided on the second pressure sensor (12). A second contact piece (14) that can contact the first contact piece (13) is provided on the inner wall of the valve seat (9). After contacting the second contact piece (14), the second pressure sensor (12) is powered on. When the valve core (10) rotates to the through hole (11) and completely passes through the conveying pipes (2) on both sides, the first contact piece (13) separates from the second contact piece (14). When the valve core (10) rotates to block the conveying pipes (2) on both sides, the first contact piece (13) contacts the second contact piece (14). The second pressure sensor (12) is connected to the touch screen (7) through the control circuit.

2. The pneumatic conveying system with a blockage response testing function according to claim 1, characterized in that: A shaft (15) is installed on the valve core (10), and a sealing cover (16) is installed on the valve seat (9). The sealing cover (16) has a hole that matches the shaft (15). A test handle (17) is provided at one end of the shaft (15) that passes through the sealing cover (16). A first sealing ring (18) is installed at the position where the valve seat (9) connects to the conveying main pipe (2). A second sealing ring (19) is installed between the shaft (15) and the sealing cover (16).

3. The pneumatic conveying system with a blockage response testing function according to claim 1, characterized in that: A position sensor (20) is installed inside the valve seat (9). When the valve core (10) rotates to completely block the conveying pipes (2) on both sides, the second pressure sensor (12) can be detected by the position sensor (20). The position sensor (20) is connected to the touch screen (7) and the host computer (8) through the control line.

4. A pneumatic conveying system with a blockage response testing function according to claim 1, characterized in that: The feed pipe of the blocking response testing mechanism is equipped with a pressure relief valve mechanism. The pressure relief valve mechanism includes a valve body (21) connected to the feed main pipe (2). A limit ring (22) is provided inside the valve body (21). A screen (23) is installed on the upper side of the limit ring (22). A blocking ball (25) is installed inside the valve body (21) on the lower side of the limit ring (22) through a spring (24). The spring (24) always tends to push the blocking ball (25) to block the limit ring (22). The end of the valve body (21) is connected to the discharge pipe of the blocking response testing mechanism through a pipeline.

5. A pneumatic conveying system with a blockage response testing function according to claim 1, characterized in that: The conveying branch pipe (3) is equipped with several material dropping unit structures. Each material dropping unit structure includes a hopper (26). A manual feeding valve (27) is installed at the bottom of the material dropping port of the hopper (26). A pneumatic feeding valve (29) is installed at the outlet of the manual feeding valve (27) through a telescopic pipe (28). A silo pump (30) is installed between the outlet of the pneumatic feeding valve (29) and the conveying branch pipe (3). A level gauge (31) is provided on the silo pump (30). An exhaust valve (32) is installed between the silo pump (30) and the hopper (26).

6. A pneumatic conveying system with a blockage response testing function according to claim 1, characterized in that: Every thirty first pressure sensors (6) are connected to pressure collectors (33) via control lines. Each pressure collector (33) is connected to touch screen (7) via control lines. Flow sensors (34) are also installed on the feed branch pipe (3) and feed main pipe (2). Flow sensors (34) are connected to touch screen (7) and host computer (8) via control lines.

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