Powder dredging valve

Abstract

The utility model discloses a powder dredging valve which comprises a valve body connected with a stock bin shell through a connecting piece, the left side of the valve body is communicated with an energy storage device, and the lower portion of the valve body is communicated with a pressure release valve. A valve cover connected with the valve port is arranged in the valve body in a sliding mode, and a thin film which drives the valve cover to move downwards and controls the valve port to be opened after pressure relief of the pressure relief valve is installed in the valve body. A gas source connector is arranged on a valve body passage communicated with the energy storage device, and a gas source conveying pipeline for conveying gas into the energy storage device is mounted at the gas source connector; an exhaust port is formed in a valve body passage opposite to the air source interface, the exhaust port is communicated with an air cylinder through a control air pipe, and the air cylinder is connected with a pressure release valve and controls the pressure release valve to be opened; a nozzle matched with the energy storage device to blow away blocked materials is formed in the connecting piece extending into the material bin shell; according to the utility model, the energy storage device communicated with the valve body is matched with the pressure release valve, so that air is introduced into the stock bin at a certain frequency, blocked materials are dredged, and the blanking efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a powder unblocking valve. Background Technology

[0002] During the powder conveying process, due to the excessive viscosity of the powder, the material is prone to blockage, stagnation, sticking, and arching in the silo, resulting in problems such as material jamming and sticking, and the material falling is not smooth, leading to a reduction in material falling efficiency.

[0003] Currently, to solve the above problems, air hammers are typically used to impact the outer wall of the silo, or holes are drilled in the silo wall and air discs are installed on the inner wall of the silo to assist in material discharge. However, air hammers cannot directly act on the material inside the silo, so the effect is not very good. Moreover, hammering the outer wall of the silo can easily cause deformation or damage to the silo, which is not conducive to material discharge. Air discs combine the dual effects of vibration and air jet flow. They use compressed air to spray along the silo wall and generate high-frequency vibration, which can effectively promote the flow of powder materials in the silo. However, air discs are mainly suitable for dry bulk materials with low clogging. For materials with high viscosity, high specific gravity, or severe clogging inside the silo, the impact force of air discs is limited and cannot effectively solve problems such as material blockage, sticking, and arching caused by high viscosity of powder materials, thus failing to improve the powder discharge efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a powder unblocking valve that can solve problems such as material blockage, sticking to the hopper, and arching caused by the high viscosity of powder materials, thereby improving the powder discharge efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A powder unblocking valve includes a valve body connected to the outer shell of a silo via a connector. An energy storage device is connected to the left side of the valve body, and a pressure relief valve is connected to the lower part of the valve body. A valve cover, connected to the valve port, is slidably mounted inside the valve body. A diaphragm is installed inside the valve body, which moves the valve cover downwards to open the valve port after the pressure relief valve releases pressure. An air source interface is provided on the valve body passage connected to the energy storage device, and an air supply pipeline is installed at the air source interface to supply gas to the energy storage device. An exhaust port is provided on the valve body passage opposite the air source interface. The exhaust port is connected to a cylinder via a control air pipe. The cylinder is connected to the pressure relief valve and controls the opening of the pressure relief valve. A nozzle is provided on the connector extending into the outer shell of the silo, which works with the energy storage device to disperse blocked material.

[0007] The aforementioned powder unblocking valve has a cylinder piston moving block slidably disposed inside the cylinder. A pin is connected to the center of the right side of the cylinder piston moving block. A compression spring is sleeved on the outer periphery of the pin. One end of the compression spring is connected to the right end of the cylinder piston moving block, and the other end is connected to the inner wall of the right side of the cylinder.

[0008] The aforementioned powder unblocking valve has a pressure relief valve core inside. The left side of the pressure relief valve core is connected to the ejector pin inside the cylinder. The right side of the pressure relief valve core is connected to the valve core return spring that drives the pressure relief valve core to reset. The other end of the valve core return spring is connected to the inner wall of the pressure relief valve.

[0009] The aforementioned powder unblocking valve has its valve cover positioned at the center of the top surface of the film.

[0010] The aforementioned powder unblocking valve is further equipped with a speed regulating valve on the gas source delivery pipeline to adjust the gas flow rate, thereby controlling the energy storage efficiency of the energy storage device and the pressure relief frequency of the pressure relief valve.

[0011] In the aforementioned powder unblocking valve, a valve cover return spring is provided at the bottom of the membrane, and the bottom end of the valve cover return spring is connected to the inner bottom wall of the valve body.

[0012] In the aforementioned powder unblocking valve, the diaphragm divides the valve body cavity into an upper chamber and a lower chamber, which are connected by a capillary tube disposed on the side wall of the valve body to balance the pressure at the upper and lower parts of the diaphragm.

[0013] In the aforementioned powder unblocking valve, the diaphragm is located below the valve body passage that communicates with the energy storage device.

[0014] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0015] This utility model provides a powder unblocking valve. By setting an energy storage device and a pressure relief valve connected to the valve body, air is circulated into the hopper at a certain frequency to unblock the blocked material, thereby improving the material discharge efficiency. Moreover, this application only uses air circuit control to achieve pressure relief and material unblocking, without the need for circuit control. It is simple to operate, not limited by the environment, and can also save power resources. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the specific structure of this utility model.

[0017] The components are: 1. Energy storage device, 2. Control air pipe, 3. Cylinder, 4. Cylinder piston moving block, 5. Compression spring, 6. Ejector pin, 7. Pressure relief valve, 8. Pressure relief valve core, 9. Valve core return spring, 10. Capillary tube, 11. Diaphragm, 12. Valve cover, 13. Valve body, 14. Connector, 15. Hopper shell, 16. Nozzle, 17. Air source delivery pipeline, 18. Speed ​​control valve, 19. Valve cover return spring, 20. Upper chamber, 21. Lower chamber. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Powder drain valve, such as Figure 1 As shown, the valve body 13 is connected to the outer shell 15 of the hopper via a connector 14. A valve cover 12 connected to the valve port is slidably disposed inside the valve body 13. A diaphragm 11 is installed inside the valve body 13 to drive the valve cover 12 to move up and down to control the opening and closing of the valve port. The valve cover 12 is located at the center of the top surface of the diaphragm 11. A valve cover return spring 19 is disposed at the bottom of the diaphragm 11. The bottom end of the valve cover return spring 19 is connected to the inner bottom wall of the valve body 13.

[0020] The diaphragm 11 divides the inner cavity of the valve body 13 into an upper cavity 20 and a lower cavity 21. The upper cavity 20 and the lower cavity 21 are connected by a capillary tube 10 provided on the side wall of the valve body 13. The capillary tube 10 keeps the pressure between the upper cavity 20 and the lower cavity 21 balanced.

[0021] An energy storage device 1 is connected to the left side of the valve body 13. An air source interface is provided on the valve body passage connected to the energy storage device 1, and an air source delivery pipeline 17 is installed at the air source interface.

[0022] The gas supply pipeline 17 is also equipped with a speed regulating valve 18 to regulate the gas flow rate. The energy storage speed of the energy storage device 1 can be adjusted by regulating the gas flow rate.

[0023] The membrane 11 is located below the valve body passage that is connected to the energy storage device 1, so that the energy storage device 1 can blow air into the hopper through the valve body 13.

[0024] An exhaust port is provided on the valve body passage opposite to the air source interface, and the exhaust port is connected to the cylinder 3 through the control air pipe 2.

[0025] The control air pipe 2 is connected to the energy storage device 1, and the pressure in the control air pipe 2 is the same as the pressure in the energy storage device 1. When the pressure in the energy storage device 1 reaches a certain value, it will drive the cylinder 3 to move.

[0026] A cylinder piston moving block 4 is slidably arranged inside the cylinder 3. A ejector pin 6 is connected to the center of the right side of the cylinder piston moving block 4. A compression spring 5 is sleeved on the outer periphery of the ejector pin 6. One end of the compression spring 5 is connected to the right end of the cylinder piston moving block 4, and the other end is connected to the inner wall of the right side of the cylinder 3.

[0027] A pressure relief valve 7 is provided below the valve body 13 and communicates with the lower chamber 21. The pressure relief valve 7 is connected to the cylinder 3 on the left side and the cylinder 3 controls the opening and closing of the pressure relief valve 7.

[0028] The pressure relief valve 7 is equipped with a pressure relief valve core 8, and the left side of the pressure relief valve core 8 is connected to the ejector pin 6 inside the cylinder 3.

[0029] The right side of the pressure relief valve core 8 is connected to the valve core return spring 9, and the other end of the valve core return spring 9 is connected to the inner wall of the pressure relief valve 7, so as to drive the pressure relief valve core 8 to reset after pressure relief.

[0030] The connector 14, which extends into the outer shell 15 of the hopper, is provided with a nozzle 16 for blowing away the blocked material. The nozzle 16 is located on the periphery of the top of the connector 14 and is tilted at a certain angle to blow air onto the material to clear it, while blowing off the powder material adhering to the inner wall of the hopper. The nozzle 16 can also be located on the top surface of the connector 14 and blow air vertically onto the material to clear the blockage.

[0031] When in use, the valve port on the valve body 13 is in the closed state, and the pressure on the diaphragm 11 from the upper chamber 20 and the lower chamber 21 is relatively balanced, and gas is delivered to the energy storage device 1 through the gas source delivery pipeline 17.

[0032] When conveying gas, the flow rate of the gas can be controlled by adjusting the speed regulating valve 18, thereby controlling the energy storage rate entering the energy storage device 1, and adjusting the pressure relief frequency of the pressure relief valve 7 according to the energy storage rate of the energy storage device 1.

[0033] When the internal pressure of the accumulator 1 reaches a certain value, the accumulator 1 begins to release the stored pressure. The same pressure inside the control air pipe 2 will push the cylinder piston moving block 4 inside the cylinder 3 to move, and compress the compression spring 5 to move the ejector pin to the right, pushing the pressure relief valve core 8 inside the pressure relief valve 7 to the right, opening the pressure relief valve 7 to complete the pressure relief of the lower chamber 21.

[0034] After the lower chamber 21 is depressurized, the pressure on the upper part of the diaphragm 11 is greater than the pressure on the lower part. The diaphragm 11 moves downward and drives the valve cover 12 to move downward to open the valve port of the valve body 13. At the same time, the gas inside the energy storage device 1 flows through the upper chamber 20 of the valve body 13 and is released into the hopper. The gas also blows away and clears the blocked material through the nozzle 16 on the connector 14.

[0035] After one round of energy storage release, the force pushing the cylinder piston moving block 4 to move to the right gradually decreases and disappears. Under the action of the compression spring 5, the cylinder piston moving block 4 moves to the left to reset, the pressure relief valve 7 closes, and the energy storage device 1 restarts energy storage.

[0036] At the same time, the valve cover 12 is reset under the action of the valve cover return spring 19. At this time, the pressure applied to the diaphragm 11 by the upper chamber 20 and the lower chamber 21 is not the same. The gas inside the upper chamber 20 flows into the lower chamber 21 through the capillary tube 10, so that the pressure applied to the diaphragm 11 by the upper chamber 20 and the lower chamber 21 is kept in balance, ensuring the sealing of the valve port inside the valve body 13.

[0037] This utility model provides a powder unblocking valve. By setting an energy storage device and a pressure relief valve connected to the valve body, air is circulated into the hopper at a certain frequency to unblock the blocked material, thereby improving the material discharge efficiency. Moreover, this application only uses air circuit control to achieve pressure relief and material unblocking, without the need for circuit control. It is simple to operate, not limited by the environment, and can also save power resources.

[0038] Furthermore, this invention is also applicable to hazardous areas where dust is prone to explosion. Inert gas is introduced into the equipment through a gas supply pipeline, and no electricity is required during operation. This solves the problem of the ignition source among the five elements constituting an explosion condition, and avoids direct contact between the ignition source and combustible dust, thus achieving inherent safety and effectively improving and enhancing safe production.

Claims

1. A powder unblocking valve, characterized in that: The device includes a valve body (13) connected to the outer shell (15) of the silo via a connector (14). An energy storage device (1) is connected to the left side of the valve body (13), and a pressure relief valve (7) is connected to the lower part of the valve body (13). A valve cover (12) connected to the valve port is slidably disposed inside the valve body (13). A diaphragm (11) is installed inside the valve body (13) to move the valve cover (12) downwards to open the valve port after the pressure relief valve (7) releases pressure. The valve body connected to the energy storage device (1) is... A gas source interface is provided on the road, and a gas source delivery pipeline (17) for delivering gas to the energy storage device (1) is installed at the gas source interface; an exhaust port is provided on the valve body passage opposite to the gas source interface, and the exhaust port is connected to the cylinder (3) through the control air pipe (2). The cylinder (3) is connected to the pressure relief valve (7) and controls the pressure relief valve (7) to open; a nozzle (16) is provided on the connector (14) that extends into the inner shell of the silo (15) to help the energy storage device (1) disperse the blocked material.

2. The powder unblocking valve according to claim 1, characterized in that: The cylinder (3) has a cylinder piston moving block (4) slidably arranged inside. A pin (6) is connected to the center of the right side of the cylinder piston moving block (4). A compression spring (5) is sleeved on the outer periphery of the pin (6). One end of the compression spring (5) is connected to the right end of the cylinder piston moving block (4), and the other end is connected to the inner wall of the right side of the cylinder (3).

3. The powder unblocking valve according to claim 2, characterized in that: The pressure relief valve (7) is equipped with a pressure relief valve core (8) inside. The left side of the pressure relief valve core (8) is connected to the ejector pin (6) inside the cylinder (3); the right side of the pressure relief valve core (8) is connected to the valve core return spring (9) that drives the pressure relief valve core (8) to reset, and the other end of the valve core return spring (9) is connected to the inner wall of the pressure relief valve (7).

4. The powder unblocking valve according to claim 1, characterized in that: The gas source delivery pipeline (17) is also equipped with a speed regulating valve (18) to regulate the gas flow rate, thereby controlling the energy storage efficiency of the energy storage device (1) and the pressure relief frequency of the pressure relief valve (7).

5. The powder unblocking valve according to claim 1, characterized in that: A valve cover return spring (19) is provided at the bottom of the diaphragm (11), and the bottom end of the valve cover return spring (19) is connected to the inner bottom wall of the valve body (13).

6. The powder unblocking valve according to claim 1, characterized in that: The diaphragm (11) divides the inner cavity of the valve body (13) into an upper cavity (20) and a lower cavity (21), and the lower cavity (21) is connected to the pressure relief valve (7); the upper cavity (20) and the lower cavity (21) are connected by a capillary tube (10) provided on the side wall of the valve body (13) to balance the pressure of the upper and lower parts of the diaphragm (11).

7. The powder unblocking valve according to claim 1, characterized in that: The diaphragm (11) is located below the valve body passage that is connected to the energy storage device (1).

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