Pneumatic conveying pipeline assisted blow valve

Abstract

The utility model discloses a kind of pneumatic conveying pipeline assisted blowing valves, belong to pneumatic conveying technical field, including valve body, the top of valve body is provided with cylinder chamber cover, hollow pressure regulator is provided on the upper surface of cylinder chamber cover, the top of pressure regulator is provided with pressure adjusting nut, pressure spring is embedded into pressure regulator, piston is abutted at the bottom of pressure spring.The utility model can be automatically opened and closed according to the pressure variation of pneumatic conveying pipeline, when pneumatic conveying pipeline is blocked each time, assisted blowing valve does not need artificial regulation and control, structure is no longer cumbersome and reacts in time, response time is short, and operation safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying technology, and in particular to a pneumatic conveying pipeline purging valve. Background Technology

[0002] Pneumatic conveying, also known as airflow conveying, utilizes the energy of airflow to transport granular materials along the airflow direction within a closed pipeline. It is a specific application of fluidization technology. Pneumatic conveying devices have a simple structure and are easy to operate. They can perform horizontal, vertical, or inclined conveying. During the conveying process, physical operations such as heating, cooling, drying, and airflow classification, or certain chemical operations, can be performed simultaneously on the materials.

[0003] In the process of pneumatic conveying, purging valves are often used. When the pneumatic conveying pipeline is blocked, the purging valves are adjusted to guide gas into the pipeline, thereby purging and clearing the blockage.

[0004] Chinese patent document CN214878530U discloses a scheme for using two types of pistons (main piston and auxiliary piston) and two sealing rings to achieve blow-assisted operation. This scheme has a complicated structure and a long response time.

[0005] To overcome the above-mentioned shortcomings, the inventor invented a pneumatic conveying pipeline purging valve. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a pneumatic conveying pipeline purging valve that can automatically open and close according to pressure changes in the pneumatic conveying pipeline. Whenever a blockage occurs in the pneumatic conveying pipeline, there is no need for manual adjustment of the purging valve. The structure is simpler, the response is timely, and the short response time ensures operational safety.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0008] A pneumatic conveying pipeline purging valve includes a valve body, a cylinder chamber cover at the top of the valve body, a hollow pressure regulator on the upper surface of the cylinder chamber cover, a pressure adjusting nut at the top of the pressure regulator, a pressure spring embedded in the pressure regulator, a piston abutting at the bottom of the pressure spring, and the pressure adjusting nut encapsulating the pressure spring and piston within the valve body. A flange with a through hole in the middle is located at the bottom of the valve body, an air outlet is located on the lower surface of the valve body, and a piston air passage hole communicating with the main cylinder is located at the lower end of the air outlet. The flange seals a one-way valve within the air outlet of the valve body. A high-pressure air inlet is located on the side wall of the valve body, communicating with a secondary cylinder within the valve body. The bottom of the secondary cylinder communicates with the air outlet at the bottom of the valve body.

[0009] As a further implementation, a piston rod is provided at the bottom of the piston, and a bidirectional sealing ring is arranged around the middle section of the piston rod.

[0010] As a further implementation, a rubber ring is provided at the free end of the piston rod.

[0011] As a further implementation, a piston passage is formed by a recess on the lower surface of the main cylinder, and the piston passage hole is connected to the piston passage of the main cylinder.

[0012] As a further implementation, the number of piston air passage holes is 2 to 5, and the piston air passage holes are set at equal intervals.

[0013] As a further implementation, the pipe between the piston air passage and the main cylinder is connected to a pressure gauge, and the pressure gauge is installed on the side wall of the valve body.

[0014] As a further implementation, the upper half of the check valve is embedded with an outlet hole, and the lower half of the check valve is embedded with the middle through hole of the flange, so that the check valve can allow gas to flow out from the outlet hole to the valve body.

[0015] As a further implementation, the cylinder cover is annular with threads on the inner side, and the cylinder cover is threaded to the pressure regulator.

[0016] As a further implementation, the pressure regulator is a hollow cylinder with a threaded hole at the top, which is threadedly connected to the pressure regulating nut.

[0017] As a further implementation, the piston and piston rod are molded as a single piece.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention encapsulates a pressure spring and piston within a valve body using a pressure adjusting nut. A flange with a central through-hole is located at the bottom of the valve body, and an air outlet is located on the lower surface of the valve body. A piston air passage, connected to the main cylinder, is located at the lower end of the air outlet. The flange seals a one-way valve within the air outlet of the valve body. A high-pressure air inlet is located on the side wall of the valve body, connecting to a secondary cylinder within the valve body. The bottom of the secondary cylinder connects to the air outlet at the bottom of the valve body. This design enables automatic opening and closing based on pressure changes in the pneumatic conveying pipeline. Whenever the pneumatic conveying pipeline becomes blocked, manual adjustment of the blow-assisted valve is unnecessary. The structure is simplified, and the response is timely and short. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0021] Figure 1 This is an exploded view of this utility model;

[0022] Figure 2 This is a utility model Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a perspective view of the one-piece piston of this utility model;

[0024] Figure 4 This is a side sectional view of the cylinder of this utility model;

[0025] Figure 5 This is an exploded view of the flange and valve body of this utility model;

[0026] The components are as follows: 1. Valve body; 2. Cylinder chamber cover; 3. Piston; 4. Air outlet; 5. Piston air passage; 6. Pressure gauge; 7. High-pressure air inlet; 8. Cylinder; 81. Main cylinder; 82. Auxiliary cylinder; 9. Piston rod; 10. Piston air passage; 11. Pipe; 13. Pressure regulator; 14. Pressure spring; 15. Threaded hole; 16. Pressure adjusting nut; 17. Check valve; 18. Flange; 19. Two-way sealing ring; 20. Rubber ring; 21. Settling groove; 22. Air inlet end of the air outlet. Detailed Implementation

[0027] Example: This example provides a pneumatic conveying pipeline purging valve, such as... Figure 1-5 As shown, the device includes a valve body 1, with a cylinder chamber cover 2 on top. The cylinder chamber cover 2 and the valve body 1 together form a cylinder chamber. A hollow pressure regulator 13 is disposed on the upper surface of the cylinder chamber cover 2, and a pressure adjusting nut 16 is disposed on the top of the pressure regulator 13. A pressure spring 14 is embedded in the pressure regulator 13, and a piston 3 is abutted against the bottom of the pressure spring 14. The pressure adjusting nut 16 encapsulates the pressure spring 14 and the piston 3 within the valve body 1. By adjusting the tightness of the pressure spring 14 through the pressure adjusting nut 16, the response threshold for opening and closing the valve body 1 can be changed. The pressure spring 14 provides a reset force to ensure that the piston 3 returns to its original position after the pressure decreases. At the same time, when the pressure in the pneumatic conveying pipeline changes slightly, the pressure spring 14 can absorb some of the impact energy, preventing frequent starts of this application.

[0028] A flange 18 with a through hole in the middle is provided at the bottom of the valve body 1. A cylinder 8 is provided inside the valve body 1. The cylinder 8 includes a main cylinder 81 and an auxiliary cylinder 82. The main cylinder 81 is arranged around the auxiliary cylinder 82. An air outlet 4 is provided on the lower surface of the valve body 1. The bottom of the auxiliary cylinder 82 is provided with an air inlet end 22 of the air outlet. The air outlet 4 is connected to the air inlet end 22 of the air outlet. A piston passage hole 5 is provided at the lower end of the air outlet 4, which is connected to the main cylinder 81 (the lower surface of the main cylinder 81 is recessed to form a piston passage 10, and the piston passage hole 5 is connected to the piston passage 10 of the main cylinder 81). Specifically, the piston passage hole 5 is connected to the main cylinder 81 through a pipe 11. The piston passage 10 of valve body 1 is connected to the main cylinder 81 so that the pressure change in the pneumatic conveying pipeline can be quickly transmitted to the main cylinder 81. The flange 18 seals the one-way valve 17 in the outlet 4 of valve body 1. This design allows the airflow in valve body 1 to flow out of valve body 1 in one direction. The side wall of valve body 1 is provided with a high-pressure air inlet 7. The high-pressure air inlet 7 is the high-pressure power source inlet of this application. The high-pressure air inlet 7 can be connected to an external compressed air pipeline (that is, to introduce a compressed air source) to provide high-pressure gas to valve body 1. The high-pressure air inlet 7 is connected to the auxiliary cylinder 82 in valve body 1. The bottom of the auxiliary cylinder 82 is connected to the outlet 4 at the bottom of valve body 1.

[0029] A piston rod 9 is located at the bottom of piston 3. The piston rod 9 is a solid structure. Piston 3 can be embedded in and slide against the main cylinder 81. Piston rod 9 can be embedded in and slide against the auxiliary cylinder 82. A bidirectional sealing ring 19 is arranged around the middle section of piston rod 9. The bidirectional sealing ring 19 isolates the gas flow between the main cylinder 81 and the auxiliary cylinder 82 to prevent gas leakage (that is, to prevent low-pressure gas and high-pressure gas from mixing). The bidirectional sealing ring 19 also prevents piston rod 9 from directly contacting and wearing with the auxiliary cylinder 82. A rubber ring 20 is provided at the free end of piston rod 9. In the initial state, the rubber ring 20 can block the air inlet end 22 of the air outlet.

[0030] The bottom of the main cylinder 81 is provided with a settling groove 21, which is circular and surrounds the auxiliary cylinder 82.

[0031] The number of piston air passage holes 5 is 2 to 5, and the piston air passage holes 5 are set at equal intervals. This is to ensure that the air pressure change in the pneumatic conveying pipeline is evenly transmitted to the main cylinder 81 and smoothly pushes the piston 3 to move, preventing the piston 3 from deviating.

[0032] The pipe 11 between the piston air passage 5 and the main cylinder 81 is connected to the pressure gauge 6, and the pressure gauge 6 is set on the side wall of the valve body 1. This scheme makes it convenient for operators to observe the pressure environment in the pneumatic conveying pipeline in real time.

[0033] The upper half of the one-way valve 17 is embedded in the vent hole 4, and the lower half of the one-way valve 17 is embedded in the middle through hole of the flange 18. The one-way valve 17 allows gas to flow out from the vent hole 4 to the outside of the valve body 1. This design allows the one-way valve 17 to be built into the valve body 1, providing better protection for the one-way valve 17. Furthermore, the built-in design of the one-way valve 17 does not require additional gas to start, enabling it to work quickly and immediately when the pneumatic conveying pipeline is blocked.

[0034] The cylinder cover 2 is annular, and the inner side of the annulus is threaded. The cylinder cover 2 is threaded to the pressure regulator 13. The annulus and inner thread design of the cylinder cover 2 facilitates quick disassembly and maintenance of internal components. The pressure regulator 13 is hollow cylindrical. At the same time, the hollow cylindrical structure of the cylinder cover 2 and the pressure regulator 13 cooperate to form a compact pressure spring 14 preload adjustment space.

[0035] The pressure regulator 13 has a threaded hole 15 on its top, which is threaded to the pressure regulating nut 16. The threaded connection structure facilitates quick disassembly and maintenance of internal components.

[0036] The piston 3 and piston rod 9 are integrally formed. This integrated piston 3 design reduces stress concentration problems caused by the splicing of multiple parts.

[0037] The working principle of this utility model is as follows: the pressure adjusting nut 16 needs to be manually rotated and adjusted, thereby adjusting the preload of the pressure spring 14, and finally setting the pipeline pressure threshold. The valve body 1 is then connected to the pneumatic conveying pipeline. When the pneumatic conveying pipeline is not blocked, there is no change in air pressure transmitted to the piston air passage 5.

[0038] When the pneumatic delivery pipeline becomes blocked, the signal of increased air pressure will be transmitted to the piston air passage 10 through the piston air passage hole 5. The number of piston air passage holes 5 corresponds to the number of piston air passages 10. That is, there are two piston air passages 10 and two piston air passage holes 5. If there are three piston air passages 10 with equal spacing, then there are three piston air passage holes 5 (piston air passage holes 5 are set at equal spacing). Each piston air passage 10 corresponds to one piston air passage hole 5, and the two are connected separately through the pipeline 11.

[0039] Piston air passage 5 transmits compressed air when the air pressure increases to main cylinder 81. Because piston 3 is embedded in main cylinder 81, compressed air pushes piston 3 to move. When piston 3 moves, piston rod 9 moves. In the original initial state, because auxiliary cylinder 82 is embedded in piston rod 9, high-pressure gas is blocked by piston rod 9 (that is, high-pressure gas cannot enter auxiliary cylinder 82). Moreover, a rubber ring 20 is provided at the free end of piston rod 9, which isolates auxiliary cylinder 82 from air outlet 4.

[0040] When piston rod 9 moves, rubber ring 20 leaves its initial position, and auxiliary cylinder 82 connects with outlet port 4. High-pressure gas then enters auxiliary cylinder 82 through high-pressure inlet port 7, and subsequently flows from auxiliary cylinder 82 into outlet port 4 (because auxiliary cylinder 82 has an inlet end 22 at the bottom of the outlet port, and outlet port 4 connects to the inlet end 22). The gas then enters the pneumatic conveying pipeline through one-way valve 17 from outlet port 4. Ultimately, the high-pressure gas assists in blowing away dust in the pneumatic conveying pipeline, preventing blockage. As the pneumatic conveying pipeline becomes unobstructed, the pipeline pressure drops, reducing the air pressure in piston passage 10 and simultaneously reducing the air pressure in main cylinder 81. Piston 3 and piston rod 9 gradually return to their initial positions, and then piston rod 9 blocks the inlet end 22 of the outlet port.

[0041] This invention achieves automatic opening and closing based on pressure changes in the pneumatic conveying pipeline through an integrated piston 3 design and a bidirectional sealing ring 19. Whenever the pneumatic conveying pipeline becomes blocked, there is no need for manual adjustment of the blowing valve. The structure is no longer cumbersome and the response is timely with a short response time.

[0042] The length, thickness, and position of the lines of the piston air passage 5, high-pressure air inlet 7, pipe 11, and air outlet 22 in the attached diagram are for illustrative purposes only. Those skilled in the art can make adaptive adjustments according to actual usage.

[0043] Pipeline 11 is a conventional setting in the prior art. Those skilled in the art can select a suitable device or setting based on the above description to realize "the connection between pipeline 11 and pressure gauge 6 between piston air passage 5 and main cylinder 81".

[0044] The settling groove 21 is a conventional feature in the prior art. Those skilled in the art can select a suitable device or feature based on the above description to achieve "the settling groove 21 is provided at the bottom of the main cylinder 81, and the settling groove 21 is circular and surrounds the auxiliary cylinder 82".

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pneumatic conveying pipeline purging valve, comprising a valve body, characterized in that: The valve body is provided with a cylinder chamber cover on the top, a hollow pressure regulator on the upper surface of the cylinder chamber cover, a pressure adjusting nut on the top of the pressure regulator, a pressure spring embedded in the pressure regulator, a piston abutting the bottom of the pressure spring, and the pressure adjusting nut encapsulating the pressure spring and piston in the valve body. The bottom of the valve body is provided with a flange with a through hole in the middle, an air outlet on the lower surface of the valve body, a piston air passage hole communicating with the main cylinder at the lower end of the air outlet, the flange sealing the one-way valve in the air outlet of the valve body, a high-pressure air inlet on the side wall of the valve body, the high-pressure air inlet communicating with the auxiliary cylinder in the valve body, and the bottom of the auxiliary cylinder communicating with the air outlet at the bottom of the valve body. The pressure regulator is a hollow cylinder with a threaded hole at the top, which is threaded to the pressure regulating nut. The lower surface of the main cylinder is recessed to form a piston passage, and the piston passage hole is connected to the piston passage of the main cylinder. When the pneumatic delivery pipeline becomes blocked, the signal of increased air pressure will be transmitted to the piston air passage through the piston air passage orifice.

2. The pneumatic conveying pipeline purging valve according to claim 1, characterized in that: A piston rod is located at the bottom of the piston, and a two-way sealing ring is arranged around the middle section of the piston rod.

3. The pneumatic conveying pipeline purging valve according to claim 2, characterized in that: A rubber ring is provided at the free end of the piston rod.

4. The pneumatic conveying pipeline purging valve according to claim 3, characterized in that: The piston has 2 to 5 air passages, and the air passages are evenly spaced.

5. A pneumatic conveying pipeline purging valve according to claim 1, characterized in that: The pipe between the piston air passage and the main cylinder is connected to a pressure gauge, which is located on the side wall of the valve body.

6. The pneumatic conveying pipeline purging valve according to claim 1, characterized in that: The upper half of the check valve is embedded with an outlet, and the lower half of the check valve is embedded with the middle through hole of the flange. The check valve enables gas to flow out from the outlet to the valve body.

7. A pneumatic conveying pipeline purging valve according to claim 1, characterized in that: The cylinder cover is annular, with threads on the inner side of the annulus, and the cylinder cover is threaded to the pressure regulator.

8. A pneumatic conveying pipeline purging valve according to claim 1, characterized in that: The piston and piston rod are molded as a single piece.

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