Dual pneumatic dosing screw feeder and method of operation thereof

Abstract

This invention discloses a dual-pneumatic quantitative screw feeding device and its working method, including a feeding mechanism, a pneumatic mechanism, a sterilization chamber, a feeding valve, and a valve core installed inside the feeding valve. One end of the feeding valve is connected to the pneumatic mechanism, the other end is connected to the sterilization chamber, and the upper end is connected to the feeding mechanism. A cylinder, piston, and connecting rod drive the valve core to move inside the feeding valve, thereby controlling the opening and closing of the feeding valve. When the feeding valve is open, the cylinder, piston, and connecting rod push the feeding screw into the feeding valve. A speed-regulating motor drives the feeding screw to rotate, thereby quantitatively feeding the material. When the speed-regulating motor stops rotating, it drives the feeding screw to move again, separating it from the feeding valve, and then closing the feeding valve. The material is then sterilized through the sterilization chamber. This device avoids the situation where the sterilization effect is poor due to the varying weight of the material fed each time, thus improving the sterilization efficiency.

Description

Technical Field

[0001] This invention relates to the field of quantitative feeding technology, specifically to a dual pneumatic quantitative screw feeding device and its working method. Background Technology

[0002] Before many materials are used, they need to be sterilized. Traditionally, materials are added into the sterilization chamber through a feeding device. However, the traditional feeding device cannot accurately add materials in quantitative terms, which can easily lead to too much or too little material in the sterilization chamber. Too much material will result in some materials not being effectively sterilized, while too little material will affect the sterilization efficiency, thus seriously affecting the normal progress of the material sterilization work.

[0003] Existing feeding devices cause materials to remain in the feeding valve body during feeding, which may deform upon heating or adhere to the valve body, causing blockage and affecting the smoothness of feeding. Poor sealing of the feeding valve can lead to leakage of powder and steam, causing environmental pollution and affecting the sterilization effect and quality of the product.

[0004] To address this, a dual pneumatic quantitative screw feeding device is proposed. Summary of the Invention

[0005] The purpose of this invention is to disclose a dual pneumatic quantitative screw feeding device to solve the problems mentioned in the background art.

[0006] The present invention also discloses a method for operating a dual pneumatic quantitative screw feeder.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dual pneumatic quantitative screw feeding device, comprising a feeding mechanism, a pneumatic mechanism, a sterilization chamber, a feeding valve, and a valve core installed in the feeding valve. One end of the feeding valve is connected to the pneumatic mechanism, the other end is connected to the sterilization chamber, and the upper end is connected to the feeding mechanism.

[0008] Preferably, the feeding mechanism includes a screw outer tube, a pneumatic component is installed at the top end of the screw outer tube, and a spiral oblique feeding interface is connected to the bottom end; a speed-regulating motor is installed inside the screw outer tube below the pneumatic component, and the output end of the speed-regulating motor is connected to the feeding screw located inside the screw outer tube; a feeder is connected to the outer wall of the screw outer tube above the feeding screw, and the two are in communication; the spiral oblique feeding interface is connected to the feed port at the upper end of the feeding valve.

[0009] Preferably, the pneumatic component includes a first cylinder, inside which a first piston is installed; a first connecting rod is installed on one side of the first piston, and the first connecting rod extends through one side of the first cylinder into the outer sleeve of the screw, and is connected to the tail of the speed-regulating motor. The piston drives the connecting rod, thereby driving the speed-regulating motor to reciprocate.

[0010] Preferably, the output shaft of the speed-regulating motor is connected to the feed screw in sequence through a coupling and a bearing, thereby driving the feed screw to reciprocate.

[0011] Preferably, the sterilization chamber has two symmetrically arranged sterilization chamber outlets at the bottom of its outer side wall. With the above arrangement, the materials can be sterilized.

[0012] Preferably, the pneumatic mechanism includes a second cylinder, one side of which is connected to a cylinder bracket; a second piston is installed inside the second cylinder; a second connecting rod is installed on one side of the second piston, and the second connecting rod extends through one side of the second cylinder into the cylinder bracket and is connected to the valve core, thereby driving the valve core to reciprocate.

[0013] Preferably, the side of the cylinder bracket away from the second cylinder is connected to the feed valve, and a spring sealing ring is installed inside the feed valve, with the inner wall of the spring sealing ring tightly fitted to the outer wall of the valve core.

[0014] Preferably, the first cylinder and the second cylinder have the same structure. Both sides of the outer wall of the first cylinder are provided with high-pressure control air inlets and outlets connected to the cylinder. A magnetic sensor is installed on the outer wall of the first cylinder between the two high-pressure control air inlets and outlets.

[0015] A method for operating the above-mentioned dual pneumatic quantitative screw feeder includes the following steps:

[0016] 1) Fill the feeder with material by installing a vacuum feeding system or a screw feeding system;

[0017] 2) The piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet and pushes the piston back and forth. The piston drives the valve core to move back and forth through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston.

[0018] 3) When the feed valve is open, the piston in the second cylinder is connected to the speed control motor through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet, pushing the piston downward. The output shaft of the speed control motor is connected to the bearing of the feed screw through the coupling. The piston rod pushes the speed control motor downward, so that the feed screw enters the feed valve through the inclined feed interface. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston.

[0019] 4) When the feed screw reaches the predetermined position, the speed-regulating motor starts to drive the feed screw to rotate at the set speed, feeding the material in the feeder into the sterilization chamber through the feed valve. The rotation speed and rotation time of the speed-regulating motor can be set according to the actual situation. The speed is set to 50-1000 revolutions per minute, and the time is 2-20 seconds. After the set working time of the speed-regulating motor ends, the speed-regulating motor stops rotating. The high-pressure gas outside the second cylinder enters the pneumatic control area from the high-pressure control gas inlet and outlet to push the piston. The output shaft of the speed-regulating motor drives the feed screw to move upward through the coupling, so that the feed screw leaves the feed valve. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston.

[0020] 5) When the feed screw has reached the predetermined position, the piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet to push the piston. The piston drives the valve core forward through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston.

[0021] 6) When the feed valve is closed, the material entering the sterilization chamber is discharged into the next sealed container through the sterilization chamber outlet after being sterilized by mixing with steam.

[0022] 7) The first and second cylinders repeat the above opening and closing actions.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The second cylinder, second piston, and second connecting rod can drive the valve core to move inside the feed valve, thereby controlling the opening and closing of the feed valve. When the feed valve is open, the first cylinder, first piston, and first connecting rod can push the feed screw into the feed valve. Then, the speed-regulating motor with a set time drives the feed screw to rotate, thereby quantitatively feeding the material. When the speed-regulating motor stops rotating, it drives the feed screw to move again, separating it from the feed valve. Then, the feed valve is closed, and the material is sterilized through the sterilization chamber. This device can avoid the situation where the sterilization effect is poor due to the different weight of the material fed each time, thus improving the sterilization efficiency.

[0025] The screw rotation speed is controlled by a servo motor, ensuring precise control of the feed rate. The dual-cylinder linkage and piston-type valve core utilize the cylinder's extension and retraction during feeding to bring the screw as close to the feed inlet as possible, guaranteeing smooth feeding. After feeding, the screw is pulled back by the cylinder, and any remaining material in the feed valve body is pushed into the sterilization chamber by the cylinder-driven valve core. This working method ensures that the material does not remain in the feed valve body, causing heat-induced denaturation or adhesion, thus preventing blockages and ensuring smooth feeding. Spring-loaded sealing rings at the front and rear ports of the feed valve effectively prevent powder and steam leakage, improving the sterilization effect and quality of the product. The feed valve is designed for quick disassembly and assembly, facilitating maintenance during daily production. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0028] Figure 3 This is a cross-sectional view of the screw outer sleeve of the present invention;

[0029] Figure 4 This is a cross-sectional schematic diagram of the feed valve and the second cylinder of the present invention.

[0030] In the diagram: 1. Feeding mechanism; 2. Pneumatic mechanism; 3. Sterilization chamber; 4. Feed valve; 5. Valve core; 6. High-pressure control air inlet / outlet; 7. Magnetic sensor; 8. First cylinder; 9. First piston; 10. First connecting rod; 11. Speed-regulating motor; 12. Coupling; 13. Bearing; 14. Feeder; 15. Feed screw; 16. Second cylinder; 17. Second piston; 18. Second connecting rod; 19. Cylinder bracket; 20. Spring sealing ring; 21. Screw outer sleeve; 22. Spiral oblique feed interface; 23. Sterilization chamber outlet; 24. Pneumatic components. 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] Please see Figure 1-4The present invention discloses a dual pneumatic quantitative screw feeding device, including a feeding mechanism 1, a pneumatic mechanism 2, a sterilization chamber 3, a feeding valve 4, and a valve core 5 installed in the feeding valve 4. One side port of the feeding valve 4 is connected to the pneumatic mechanism 2, the other side port is connected to the sterilization chamber 3, and the upper feed port is connected to the feeding mechanism 1.

[0033] The feeding mechanism 1 includes a screw outer tube 21, with a pneumatic assembly 24 installed at the top end and a spiral inclined feeding interface 22 connected to the bottom end; a speed-regulating motor 11 is installed inside the screw outer tube 21 below the pneumatic assembly, and the output end of the speed-regulating motor 11 is connected to the feeding screw 15 located inside the screw outer tube 21; a feeder 14 is connected to the outer wall of the screw outer tube 21 above the feeding screw 15, and the two are in communication.

[0034] It should be noted that the spiral inclined feed interface 22 is connected to the feed port at the upper end of the feed valve 4, thereby completing the docking of the feed mechanism 1 and the feed valve 4, making it more convenient to feed materials and saving time.

[0035] The pneumatic assembly 24 includes a first cylinder 8, inside which a first piston 9 is installed; a first connecting rod 10 is installed on one side of the first piston 9, and the first connecting rod 10 extends through one side of the first cylinder 8 into the screw outer sleeve 21 and is connected to the tail of the speed regulating motor 11.

[0036] It should be noted that: the tail end here refers to the end opposite to the output end of the speed-regulating motor;

[0037] It should be noted that the output shaft of the speed-regulating motor 11 is connected to the feed screw 15 via the coupling 12 and bearing 13 in sequence. The speed-regulating motor is driven to reciprocate through the piston and connecting rod, which in turn drives the feed screw 16 to reciprocate, thereby realizing the feeding operation.

[0038] The first cylinder 8 has high-pressure control air inlets and outlets 6 on both sides of its outer side wall, which are connected to the cylinder. The high-pressure control air inlets and outlets 6 can be connected to external equipment such as air pumps. A magnetic sensor 7 is installed on the outer side wall of the first cylinder 8 between the two high-pressure control air inlets and outlets 6 to determine whether the feed screw has reached the predetermined position.

[0039] The pneumatic mechanism 2 includes a second cylinder 16, one side of which is connected to a cylinder bracket 19; a second piston 17 is installed inside the second cylinder 16; a second connecting rod 18 is installed on one side of the second piston 17, and the second connecting rod 18 extends through one side of the second cylinder 16 into the cylinder bracket 19 and is connected to the valve core 5. The valve core is driven to move back and forth by the reciprocating motion of the piston and the connecting rod.

[0040] The side of the cylinder bracket 19 away from the second cylinder 16 is connected to the feed valve 3. A spring sealing ring 20 is installed inside the feed valve 3. The inner wall of the spring sealing ring 20 is tightly fitted with the outer wall of the valve core 5, which increases the sealing performance.

[0041] It should be noted that the second cylinder 16 has the same structure as the first cylinder 8. Both sides of the outer wall of the second cylinder 16 are provided with high-pressure control air inlet and outlet 6 connected to the cylinder. A magnetic sensor 7 is installed on the outer wall of the second cylinder 16 between the two high-pressure control air inlet and outlet 6 to determine the opening and closing state of the feed valve.

[0042] Two sterilization chamber outlets 23 are symmetrically opened at the bottom of the outer wall of the sterilization chamber 3, which makes it easier to discharge the materials after sterilization and disinfection.

[0043] The present invention also discloses a method for operating a dual pneumatic quantitative screw feeder, comprising the following steps:

[0044] 1) Fill the feeder with material by installing a vacuum feeding system or a screw feeding system;

[0045] 2) The piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet and pushes the piston back and forth. The piston drives the valve core to move back and forth through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston.

[0046] 3) When the feed valve is open, the piston in the second cylinder is connected to the speed control motor through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet, pushing the piston downward. The output shaft of the speed control motor is connected to the bearing of the feed screw through the coupling. The piston rod pushes the speed control motor downward, so that the feed screw enters the feed valve through the inclined feed interface. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston.

[0047] 4) When the feed screw reaches the predetermined position, the speed-regulating motor starts to drive the feed screw to rotate at the set speed, feeding the material in the feeder into the sterilization chamber through the feed valve. The rotation speed and rotation time of the speed-regulating motor can be set according to the actual situation. The speed is set to 50-1000 revolutions per minute, and the time is 2-20 seconds. After the set working time of the speed-regulating motor ends, the speed-regulating motor stops rotating. The high-pressure gas outside the second cylinder enters the pneumatic control area from the high-pressure control gas inlet and outlet to push the piston. The output shaft of the speed-regulating motor drives the feed screw to move upward through the coupling, so that the feed screw leaves the feed valve. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston.

[0048] 5) When the feed screw has reached the predetermined position, the piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet to push the piston. The piston drives the valve core forward through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston.

[0049] 6) When the feed valve is closed, the material entering the sterilization chamber is discharged into the next sealed container through the sterilization chamber outlet after being sterilized by mixing with steam.

[0050] 7) The first and second cylinders repeat the above opening and closing actions.

[0051] Example 1:

[0052] In operation, the feeder is first filled with material using a vacuum or screw feeding system. Then, high-pressure gas is injected into the second cylinder through the high-pressure control air inlet / outlet, pushing the second piston. This movement of the second piston moves the second connecting rod, which in turn pulls the valve core towards the second cylinder, opening the feed valve. A magnetic sensor detects the position of the second piston to determine if the feed valve is open. Once fully open, high-pressure gas is injected into the first cylinder through the high-pressure control air inlet / outlet, pushing the first piston downwards. This movement of the first piston moves the first connecting rod, which in turn moves the speed-regulating motor. The speed-regulating motor allows one end of the feed screw to enter the feed valve through the spiral feed interface. The speed-regulating motor then rotates the feed screw at a set speed, feeding the material from the feeder through the feed valve into the sterilization chamber. The rotation speed and time of the speed-regulating motor are both adjustable, with a speed setting of 50-100 km / h. The speed control motor operates at 00 revolutions per minute for 2-20 seconds. Once the set working time is reached, the motor stops rotating. High-pressure gas is then injected back into the first cylinder through the high-pressure control air inlet / outlet, pushing the first piston upwards. This movement of the first piston drives the speed control motor and the feeding screw upwards, separating the feeding screw from the feeding valve. A magnetic sensor detects the position of the first piston. Upon reaching the predetermined position, high-pressure gas is again injected into the second cylinder through the high-pressure control air inlet / outlet, pushing the valve core towards the feeding valve. This seals the feeding valve with the valve core and spring sealing ring. The magnetic sensor then detects the position of the second piston. Upon reaching the predetermined position, the sterilization chamber is activated. The material is sterilized by steam inside the sterilization chamber and then discharged into the next sealed container through the sterilization chamber outlet. The first and second cylinders then repeat the feeding and closing process, allowing for more convenient and faster quantitative feeding of materials and improving the sterilization effect.

[0053] Although embodiments of the 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 these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual pneumatic quantitative screw feeding device, characterized in that: It includes a feeding mechanism (1), a pneumatic mechanism (2), a sterilization chamber (3), a feeding valve (4), and a valve core (5) installed in the feeding valve (4). One end of the feeding valve (4) is connected to the pneumatic mechanism (2), the other end is connected to the sterilization chamber (3), and the upper end is connected to the feeding mechanism (1). The feeding mechanism (1) includes a screw outer tube (21), a pneumatic assembly (24) is installed at the top of the screw outer tube (21), and a spiral inclined feeding interface (22) is connected to the bottom end; a speed regulating motor (11) is installed in the screw outer tube (21) below the pneumatic assembly, and the output end of the speed regulating motor (11) is connected to the feeding screw (15) located in the screw outer tube (21); a feeder (14) is connected to the outer wall of the screw outer tube (21) above the feeding screw (15), and the two are connected; the spiral inclined feeding interface (22) is connected to the feed port at the upper end of the feeding valve (4); The pneumatic assembly (24) includes a first cylinder (8), and a first piston (9) is installed inside the first cylinder (8); a first connecting rod (10) is installed on one side of the first piston (9), and the first connecting rod (10) extends through one side of the first cylinder (8) into the screw outer sleeve (21) and is connected to the tail of the speed regulating motor (11). The pneumatic mechanism (2) includes a second cylinder (16); one side of the second cylinder (16) is connected to a cylinder bracket (19); a second piston (17) is installed inside the second cylinder (16); a second connecting rod (18) is installed on one side of the second piston (17), and the second connecting rod (18) extends through one side of the second cylinder (16) into the cylinder bracket (19) and is connected to the valve core (5), thereby driving the valve core to move back and forth; The side of the cylinder bracket (19) away from the second cylinder (16) is connected to the feed valve (4). The feed valve (4) is equipped with a spring sealing ring (20). The inner wall of the spring sealing ring (20) is tightly fitted to the outer wall of the valve core (5). The output shaft of the speed-regulating motor (11) is connected to the feed screw (15) in sequence through the coupling (12) and bearing (13), thereby driving the feed screw (15) to move back and forth.

2. The dual pneumatic quantitative screw feeding device according to claim 1, characterized in that: The sterilization chamber (3) has two symmetrically arranged sterilization chamber outlets (23) at the bottom of its outer side wall.

3. The dual pneumatic quantitative screw feeding device according to claim 1, characterized in that: The first cylinder (8) has high-pressure control air inlets and outlets (6) connected to the cylinder on both sides of its outer side wall. A magnetic sensor (7) is installed on the outer side wall of the first cylinder (8) between the two high-pressure control air inlets and outlets (6).

4. The dual pneumatic quantitative screw feeding device according to claim 1, characterized in that: The second cylinder (16) has high-pressure control air inlets and outlets (6) connected to the cylinder on both sides of its outer side wall. A magnetic sensor (7) is installed on the outer side wall of the first cylinder (8) between the two high-pressure control air inlets and outlets (6).

5. A method for operating the dual pneumatic quantitative screw feeding device as described in claim 1, characterized in that: Includes the following steps: 1) Fill the feeder with material by installing a vacuum feeding system or a screw feeding system; 2) The piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet and pushes the piston back and forth. The piston drives the valve core to move back and forth through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston. 3) When the feed valve is open, the piston in the second cylinder is connected to the speed control motor through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet, pushing the piston downward. The output shaft of the speed control motor is connected to the bearing of the feed screw through the coupling. The piston rod pushes the speed control motor downward, so that the feed screw enters the feed valve through the inclined feed interface. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston. 4) When the feed screw reaches the predetermined position, the speed-regulating motor starts to drive the feed screw to rotate at the set speed, feeding the material in the feeder into the sterilization chamber through the feed valve. The rotation speed and rotation time of the speed-regulating motor can be set according to the actual situation. The speed is set to 50-1000 revolutions per minute, and the time is 2-20 seconds. After the set working time of the speed-regulating motor ends, the speed-regulating motor stops rotating. The high-pressure gas outside the second cylinder enters the pneumatic control area from the high-pressure control gas inlet and outlet to push the piston. The output shaft of the speed-regulating motor drives the feed screw to move upward through the coupling, so that the feed screw leaves the feed valve. At this time, the magnetic sensor installed outside the second cylinder determines whether the feed screw has reached the predetermined position through the movement of the piston. 5) When the feed screw has reached the predetermined position, the piston in the first cylinder is connected to the valve core in the feed valve through the connecting rod. Compressed air enters the pneumatic control area from the high-pressure control air inlet and outlet to push the piston. The piston drives the valve core forward through the connecting rod. The magnetic sensor installed outside the first cylinder determines the opening and closing status of the feed valve through the movement of the piston. 6) When the feed valve is closed, the material entering the sterilization chamber is discharged into the next sealed container through the sterilization chamber outlet after being sterilized by mixing with steam. 7) The first and second cylinders repeat the above opening and closing actions.

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