A one-way valve for a dense phase pneumatic conveying system

Abstract

The utility model relates to pneumatic conveying system technical field, and disclose a kind of check valve for dense phase pneumatic conveying system, including conveying pipeline and check valve, the air inlet end of check valve is connected with metal hose, the other end of metal hose is connected with compressed air pipeline, check valve is installed in the top end of conveying pipeline.The check valve for dense phase pneumatic conveying system, by being provided with its can adapt to most positive pressure dense phase pneumatic conveying condition, can effectively divide large size material plug in conveying pipeline, to avoid material plug blockage and lead to conveying failure, let the pressure sensor on conveying pipeline is no longer necessary option, to reduce the equipment construction cost, using pure mechanical structure, make its work more reliable, can adapt to more severe conveying condition, when single fault does not affect the normal operation of other check valve, can accurately lock the blockage part of conveying material pipe, to accurately supplement air, can save gas, save energy for long-term operation of system.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying system technology, specifically a check valve for a dense phase pneumatic conveying system. Background Technology

[0002] To improve material flow and prevent blockages in pipelines, traditional positive pressure dense phase pneumatic conveying systems typically employ powder metallurgy nozzles on the conveying pipe. Depending on the material characteristics, one nozzle is installed every 0.5 to 1 meter. The nozzle orifice is connected to the conveying pipe, and the air inlet is connected to the compressed air pipeline. Correspondingly, a pressure sensor is installed at regular intervals along the conveying pipeline. The pressure sensor feeds signals back to the control system, which determines whether a blockage has occurred in that pipe section based on the pressure value. If a blockage is detected, the solenoid valve of the compressed air pipeline in that section is activated, supplying air to all nozzles in that section to eliminate the blockage.

[0003] While the above methods can effectively reduce the risk of pipeline blockage during dense phase pneumatic conveying, the cost is relatively high for long-distance dense phase pneumatic conveying, and the requirements for subsequent system maintenance are also high. In addition, its energy efficiency needs to be considered from an energy-saving perspective. Utility Model Content

[0004] The purpose of this invention is to provide a one-way valve for a dense phase pneumatic conveying system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a one-way valve for a dense phase pneumatic conveying system, comprising a conveying pipeline and a one-way valve, wherein the air inlet end of the one-way valve is connected to a metal hose, the other end of the metal hose is connected to a compressed air pipeline, and the one-way valve is installed at the top of the conveying pipeline.

[0006] The one-way valve includes a valve body, a valve seat mounted at the bottom of the valve body, a valve core mounted in the middle of the valve seat, and a lock nut threaded onto the top of the valve core. An O-ring is mounted inside the bottom of the valve body, and an O-ring is mounted outside the bottom of the valve body. The O-ring mainly functions to seal when the one-way valve is connected to a material pipeline, preventing material from overflowing back into the pipeline. A pressure gauge is mounted at the middle of the top of the valve body. A sleeve is installed inside the valve body, and a valve stem is installed inside the sleeve. A lock nut is mounted on the left end of the valve stem, and a sealing gasket is connected to the right surface of the lock nut. A pressure plate is connected to the surface of the sealing gasket. The lock nut is used to fix the sealing gasket and the pressure plate, ensuring they are flush with the valve stem. Forming a whole, the right end of the pressure plate is connected to a telescopic dust cover. An adjusting screw is inserted into the inside of the sleeve. A locking nut is connected to the right side surface of the sleeve. A spring is connected to the top surface of the valve seat. A spring is installed inside the left end of the adjusting screw. The locking nut connects the valve core and the valve seat. By adjusting its relative position on the valve core, the elasticity of spring one can be adjusted, thereby adjusting the fit between the valve core and the valve seat. The pressure gauge is used to adjust the elasticity of spring two so that the one-way valve opening pressure reaches the set value. After the pressure is set, a plug can be used for replacement. The function of the locking nut is to position the adjusting screw after adjustment to prevent the screw from loosening during operation and affecting the set pressure value.

[0007] Preferably, the spring is attached to the top surface of the valve core, and the valve core and valve seat cooperate to form a sealing structure to prevent the material in the conveying pipeline from invading the valve body in the reverse direction. The spring provides power for the valve core to reset, so that the valve core and valve seat sealing surfaces are in contact.

[0008] Preferably, the second spring is attached to the surface of the valve stem. One end of the valve stem is connected to the sealing gasket and the pressure plate, and the other end is attached to the end face of the second spring. When compressed air is applied, if the thrust generated by the compressed air is greater than the preset elastic force of the second spring, the structure will slide to the side of the second spring; otherwise, it will remain in place. The second spring is used to set the opening pressure of the one-way valve. After installation, it has a certain preset elastic force, which forces the sealing gasket and the valve body to form a sealing surface.

[0009] Preferably, the valve stem is inserted into the middle position of the sleeve, and the sleeve is connected to the right end of the telescopic dust cover. The telescopic dust cover mainly protects the valve stem sliding section, preventing fine dust from entering the valve body and adhering to the valve stem surface to form abrasive wear, thus causing the valve stem to move poorly.

[0010] Preferably, the sleeve is connected to the surface of the adjusting screw. The sleeve provides guidance and support for the movement of the valve stem and the second spring, and also provides support and connection for the movement of the adjusting screw. The adjusting screw is used to set the opening pressure of the one-way valve. Its principle is to adjust the spring force of the second spring by adjusting the screw screw insertion length, so that a certain force is formed between the sealing gasket and the valve body.

[0011] Preferably, the O-ring is connected to the top of the valve seat. The O-ring is used to seal the mating surfaces between the valve seat and the valve body to prevent compressed air leakage and dust intrusion into the valve body. The valve seat and the valve core cooperate to form a sealing structure, and at the same time, it provides guidance and support for the movement of the valve core.

[0012] Preferably, the sealing gasket is movably connected to the left end of the valve stem, and the pressure plate is movably connected to the left end of the valve stem. The sealing gasket and the inner shoulder of the valve body form a mating surface, which plays the role of sealing compressed air. The pressure plate provides support for the sealing gasket, so that it can fit tightly against the inner shoulder of the valve seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This dense phase pneumatic conveying system uses a one-way valve, which can adapt to most positive pressure dense phase pneumatic conveying conditions. It can effectively separate large-sized material plugs in the conveying pipeline, thereby avoiding material plug blockage and conveying failure.

[0014] This dense-phase pneumatic conveying system uses a check valve, eliminating the need for pressure sensors on the conveying pipeline, thereby reducing equipment construction costs.

[0015] This dense-phase pneumatic conveying system uses a one-way valve with a purely mechanical structure, making it more reliable and adaptable to harsher conveying conditions.

[0016] This dense-phase pneumatic conveying system uses check valves, and the failure of one check valve will not affect the normal operation of other check valves, thus exhibiting high robustness.

[0017] This dense-phase pneumatic conveying system uses a one-way valve to accurately locate the blockage in the conveying pipe, thereby precisely replenishing air and saving air resources, thus conserving energy for the long-term operation of the system. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the entire utility model; Figure 2 This is a schematic diagram of the internal structure of the one-way valve of this utility model; Figure 3 This utility model Figure 2 A magnified view of the structure at point A in the diagram; Figure 4This is a schematic diagram of the internal structure of the conveying pipeline and one-way valve of this utility model.

[0019] In the diagram: 1. Delivery pipeline; 2. Check valve; 2-1. Valve body; 2-2. O-ring one; 2-3. Valve seat; 2-4. Valve core; 2-5. Spring one; 2-6. Locking nut one; 2-7. O-ring two; 2-8. Sealing gasket; 2-9. Pressure plate; 2-10. Locking nut two; 2-11. Pressure gauge; 2-12. Telescopic dust cover; 2-13. Valve stem; 2-14. Spring two; 2-15. Sleeve; 2-16. Adjusting screw; 2-17. Locking nut; 3. Metal hose; 4. Compressed air pipeline. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 The present invention provides the following technical solution: A one-way valve for a dense phase pneumatic conveying system includes a conveying pipeline 1 and a one-way valve 2. The air inlet end of the one-way valve 2 is connected to a metal hose 3, and the other end of the metal hose 3 is connected to a compressed air pipeline 4. The one-way valve 2 is installed at the top of the conveying pipeline 1.

[0022] The one-way valve 2 includes a valve body 2-1, a valve seat 2-3 installed at the bottom of the valve body 2-1, a valve core 2-4 installed in the middle of the valve seat 2-3, and an O-ring 2-2 connected to the top of the valve seat 2-3. The O-ring 2-2 is used to seal the mating surfaces between the valve seat 2-3 and the valve body 2-1 to prevent compressed air leakage and dust intrusion into the valve body 2-1. The valve seat 2-3 and the valve core 2-4 cooperate to form a sealing structure, and also provide guidance and support for the movement of the valve core 2-4.

[0023] The valve core 2-4 is threaded with a lock nut 2-6. The valve body 2-1 has an O-ring 2-2 installed at the bottom inside and an O-ring 2-7 installed at the bottom outside. The O-ring 2-7 mainly plays a sealing role when the check valve is connected to the material pipeline to prevent the material in the conveying pipeline from overflowing in the reverse direction.

[0024] A pressure gauge 2-11 is installed at the top center of the valve body 2-1. A sleeve 2-15 is installed inside the valve body 2-1. A valve stem 2-13 is installed inside the sleeve 2-15. A lock nut 2-10 is installed on the left end of the valve stem 2-13. A sealing gasket 2-8 is connected to the right side surface of the lock nut 2-10. A pressure plate 2-9 is connected to the surface of the sealing gasket 2-8. The sealing gasket 2-8 is movably connected to the left end of the valve stem 2-13. The pressure plate 2-9 is movably connected to the left end of the valve stem 2-13. The sealing gasket 2-8 and the internal shoulder of the valve body 2-1 form a mating surface, which plays the role of sealing compressed air. The pressure plate 2-9 provides support for the sealing gasket 2-8, so that it can fit tightly against the shoulder inside the valve seat 2-1.

[0025] The anti-loosening nut 2-10 is used to fix the sealing gasket 2-8 and the pressure plate 2-9, making them a whole with the valve stem 2-13. The right end of the pressure plate 2-9 is connected to the telescopic dust cover 2-12. The valve stem 2-13 is inserted into the middle position of the sleeve 2-15. The sleeve 2-15 is connected to the right end of the telescopic dust cover 2-12. The telescopic dust cover 2-12 mainly protects the sliding section of the valve stem 2-13, preventing fine dust from entering the valve body 2-1 and adhering to the surface of the valve stem 2-13 to form abrasive wear, which would cause the valve stem 2-13 to move poorly.

[0026] An adjusting screw 2-16 is inserted inside the sleeve 2-15. The sleeve 2-15 is connected to the surface of the adjusting screw 2-16. The sleeve 2-15 provides guidance and support for the movement of the valve stem 2-13 and the second spring 2-14, and also provides support and connection for the movement of the adjusting screw 2-16. The adjusting screw 2-16 is used to set the opening pressure of the one-way valve. Its principle is to adjust the spring force of the second spring 2-14 by adjusting the screw screw insertion length, so that a certain force is formed between the sealing gasket 2-8 and the valve body 2-1.

[0027] A locking nut 2-17 is connected to the right side surface of the sleeve 2-15, and a spring 2-5 is connected to the top surface of the valve seat 2-3. The spring 2-5 is attached to the top surface of the valve core 2-4. The valve core 2-4 and the valve seat 2-3 cooperate to form a sealing structure, preventing the material in the conveying pipeline from entering the valve body 2-1 in the reverse direction. The spring 2-5 provides power for the reset of the valve core 2-4, so that the valve core 2-4 and the sealing surface of the valve seat 2-3 are in contact.

[0028] A spring 2-14 is installed inside the left end of the adjusting screw 2-16. The spring 2-14 is in contact with the surface of the valve stem 2-13. One end of the valve stem 2-13 is connected to the sealing gasket 2-8 and the pressure plate 2-9, and the other end is in contact with the end face of the spring 2-14. When compressed air is connected, if the thrust generated by the compressed air is greater than the preset elastic force of the spring 2-14, the structure will slide towards the spring 2-14. Otherwise, it will remain in place. The spring 2-14 is used to set the opening pressure of the check valve. After installation, it has a certain preset elastic force, which forces the sealing gasket 2-8 to form a sealing surface with the valve body 2-1.

[0029] The anti-loosening nut 2-6 connects the valve core 2-4 and the valve seat 2-3. By adjusting its relative position on the valve core 2-4, the elasticity of the spring 2-5 can be adjusted, thereby adjusting the fit between the valve core 2-4 and the valve seat 2-3. The pressure gauge 2-11 is used to adjust the elasticity of the spring 2-14 so that the opening pressure of the one-way valve reaches the set value. After the pressure is set, the plug can be replaced. The function of the locking nut 2-17 is to position the adjusting screw 2-16 after adjustment to prevent the screw from loosening during operation and affecting the set pressure value.

[0030] In use, the compressed air pipeline 4 can transport compressed air, allowing the compressed air to enter the one-way valve 2 through the metal hose 3.

[0031] When compressed air is connected, if the thrust generated by the compressed air is greater than the preset elastic force of spring 2-14, the valve stem 2-13 will slide towards spring 2-14, and then the locking nut 2-17 will be rotated to position the adjusting screw 216.

[0032] Compressed gas is injected into the interior of the conveying pipeline 1 through valve body 2-1, valve seat 2-3 and valve core 2-4. At the same time, valve seat 2-3 and valve core 2-4 can prevent material plugs inside the conveying pipeline 1 from entering the interior of valve body 2-1.

[0033] Compressed gas is introduced into the conveying pipeline 1, which can accurately replenish the gas supply to areas where material plugs are blocked inside the conveying pipeline 1, thereby saving gas resources and preventing material plugs from becoming blocked inside the conveying pipeline 1.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A check valve for a dense-phase pneumatic conveying system, comprising a conveying pipeline (1) and a check valve (2), characterized in that: The air inlet of the one-way valve (2) is connected to a metal hose (3), and the other end of the metal hose (3) is connected to a compressed air pipeline (4). The one-way valve (2) is installed at the top of the delivery pipeline (1). The one-way valve (2) includes a valve body (2-1), a valve seat (2-3) installed at the bottom of the valve body (2-1), a valve core (2-4) installed in the middle of the valve seat (2-3), a locking nut (2-6) threaded to the top of the valve core (2-4), an O-ring (2-2) installed at the bottom inside the valve body (2-1), an O-ring (2-7) installed at the bottom outside the valve body (2-1), a pressure gauge (2-11) installed at the middle of the top of the valve body (2-1), a sleeve (2-15) installed inside the valve body (2-1), and a valve stem (2-13) installed inside the sleeve (2-15). The valve stem (2-13) is equipped with a second anti-loosening nut (2-10) on its left end. A sealing gasket (2-8) is connected to the right side surface of the second anti-loosening nut (2-10). A pressure plate (2-9) is connected to the surface of the sealing gasket (2-8). A telescopic dust cover (2-12) is connected to the right end of the pressure plate (2-9). An adjusting screw (2-16) is inserted into the inside of the sleeve (2-15). A locking nut (2-17) is connected to the right side surface of the sleeve (2-15). A spring (2-5) is connected to the top surface of the valve seat (2-3). A spring (2-14) is installed inside the left end of the adjusting screw (2-16).

2. The check valve for a dense-phase pneumatic conveying system according to claim 1, characterized in that: The spring (2-5) is attached to the top surface of the valve core (2-4).

3. A check valve for a dense-phase pneumatic conveying system according to claim 2, characterized in that: The second spring (2-14) is in contact with the surface of the valve stem (2-13).

4. A check valve for a dense-phase pneumatic conveying system according to claim 3, characterized in that: The valve stem (2-13) is inserted into the middle position of the sleeve (2-15), and the sleeve (2-15) is connected to the right end of the telescopic dust cover (2-12).

5. A check valve for a dense-phase pneumatic conveying system according to claim 4, characterized in that: The sleeve (2-15) is connected to the surface of the adjusting screw (2-16).

6. A check valve for a dense-phase pneumatic conveying system according to claim 5, characterized in that: The O-ring 1 (2-2) is connected to the top of the valve seat (2-3).

7. A check valve for a dense-phase pneumatic conveying system according to claim 6, characterized in that: The sealing gasket (2-8) is movably connected to the left end of the valve stem (2-13), and the pressure plate (2-9) is movably connected to the left end of the valve stem (2-13).

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