Continuous opening and closing control system for bottom cover of extraction tank

Abstract

The utility model relates to a continuous opening and closing control system for an extraction tank bottom cover. The continuous opening and closing control system comprises a bottom cover opening and closing cylinder, a bottom cover lockset cylinder and a pneumatic control system, according to the utility model, the bottom cover lock and the bottom cover can be continuously opened or closed only by operating the opening button or the closing button once and through the mutual interlocking matching of the mechanical valve detection position and the pneumatic control valve, so that the operation is simplified. The position states of the bottom cover and the bottom cover lock cylinder are detected through the mechanical valve, manual judgment is replaced, the labor cost is saved, and the risk of personal injury can be reduced. A switch air cylinder control valve is a middle-position closed five-opening three-position pneumatic control valve, when compressed air is suddenly cut off, it can be guaranteed that the bottom cover is in the current state, and misoperation of the bottom cover is avoided. A priority valve is selected as a lock cylinder control valve, when the enabling end of the pneumatic control valve has compressed air with the same pressure, the priority end can preferentially process actions, and the situation that a bottom cover lock cylinder cannot be opened or closed and the cylinder is damaged is avoided.

Description

Technical Field

[0001] This utility model relates to a bottom cover control device for an extraction tank, specifically a continuous switching control system for the bottom cover of an extraction tank. Background Technology

[0002] In industries such as pharmaceuticals and beverages, extraction tanks are often used in the extraction of traditional Chinese medicine and plants. In the extraction process, the discharge of traditional Chinese medicine or plant residues by opening and closing the bottom cover of the extraction tank is a very critical step. The existing extraction tank bottom cover uses a manual control method. This involves manually operating a robotic arm valve in steps: first, opening the valve to unlock the bottom cover; then manually confirming the lock is fully open; then manually opening the valve again; and so on. Conversely, closing the valve and confirming the lock is fully closed is another step. This process is not continuously controllable and requires multiple confirmations from the operator. Furthermore, due to the large size of the extraction tanks, most are suspended from floors or platforms. Manually confirming the opening and closing not only wastes manpower and introduces errors but also poses safety risks such as personnel injury and mechanical damage. Utility Model Content

[0003] The purpose of this invention is to provide a continuous switching control system for the bottom cover of an extraction tank, so as to solve the problems of the existing extraction tank bottom cover using manual control, which is complicated to operate, wastes manpower, has inaccurate human judgment, and poses risks of personnel injury and mechanical damage.

[0004] This utility model is implemented as follows: a continuous switching control system for the bottom cover of an extraction tank, comprising a bottom cover switching cylinder, a bottom cover locking cylinder, and a pneumatic control system; the pneumatic control system includes a first channel connected to an air source, the first channel being connected to a second channel and a third channel arranged in parallel, a first manual valve and a first three-port two-position pneumatic control valve being connected in series on the second channel, and a second manual valve being arranged on the third channel; the second and third channels are respectively connected to the control ports at both ends of the switching cylinder control valve, and the first channel is connected to the bottom cover switching cylinder through the switching cylinder control valve; the first channel is also connected to a parallel-connected... The fourth and fifth channels are equipped with a first mechanical valve on the fourth channel and a second mechanical valve and a second / third-port two-position pneumatic control valve connected in series on the fifth channel. When the bottom cover lock cylinder is opened to the correct position, it contacts the first mechanical valve; when the bottom cover is closed, it contacts the second mechanical valve. The fourth channel is connected to the control ports of the first / third-port two-position pneumatic control valve and the second / third-port two-position pneumatic control valve. The fifth channel is connected to the third channel via an OR valve. The first channel is connected to the bottom cover lock cylinder via a lock cylinder control valve. One end of the lock cylinder control valve is connected to the second channel via a sixth channel, and the other end is connected to the fifth channel via a seventh channel.

[0005] As a further improvement to the continuous switching control system of the bottom cover of the extraction tank of this utility model, the switching cylinder control valve is a mid-position closed five-port three-position pneumatic control valve, and the first channel is connected to the two air inlets of the five-port three-position pneumatic control valve through two one-way valves respectively.

[0006] As a further improvement to the continuous switching control system for the bottom cover of the extraction tank of this utility model, the lock cylinder control valve is a five-port two-position pneumatic priority valve.

[0007] As a further improvement to the continuous switching control system of the extraction tank bottom cover of this utility model, a key valve is provided on the first channel, and the key valve is located in front of the second and third channels that are arranged in parallel.

[0008] As a further improvement to the continuous switching control system of the extraction tank bottom cover of this utility model, the manual valve is a flat-head push-button type manual valve.

[0009] As a further improvement to the continuous switching control system of the extraction tank bottom cover of this utility model, the mechanical valve is a roller lever type mechanical valve.

[0010] As a further improvement to the continuous switching control system for the bottom cover of the extraction tank of this utility model, a pressure regulating valve is provided in the air circuit connecting the control valve of the switching cylinder and the bottom cover switching cylinder.

[0011] As a further improvement to the continuous switching control system of the extraction tank bottom cover of this utility model, a gas source pressure regulating filter is provided on the first channel.

[0012] When using this invention to control the bottom cover of the extraction tank, the operator only needs to press the open button once or the close button once. Through the interlocking of the mechanical valve detecting the position and the pneumatic control valve, the bottom cover lock and the bottom cover can be continuously opened or closed, simplifying operation. This invention uses a mechanical valve to detect the position status of the bottom cover and the bottom cover lock cylinder, replacing manual judgment. This is more accurate than manual judgment, saves time, and is equivalent to saving labor costs. It also reduces the risk of personal injury, whereas otherwise, personnel would need to go to the bottom of the equipment to confirm.

[0013] Furthermore, the pneumatic control valve for controlling the bottom cover switch in this invention is a center-position closed five-port three-position pneumatic control valve. When the compressed air supply is suddenly interrupted, this pneumatic control valve can ensure that the bottom cover remains in its current state, preventing malfunction and avoiding equipment damage or personal injury. The lock cylinder control valve for controlling the bottom cover lock switch is a priority valve. When there is compressed air of the same pressure at both ends of this pneumatic control valve, the priority end can process the action first. Compared with traditional manually operated mechanical valves, this avoids back pressure in the pneumatic control valve, preventing the bottom cover lock cylinder from failing to open or close and preventing cylinder damage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the pneumatic control system of this utility model.

[0015] In the diagram: 1. First channel; 2. Compressed air inlet; 3. Air source pressure regulating filter; 4. Second channel; 5. Third channel; 6. Fourth channel; 7. Fifth channel; 8. Sixth channel; 9. Seventh channel; 10. First manual valve; 11. Second manual valve; 12. Switch cylinder control valve; 13. First mechanical valve; 14. Second mechanical valve; 15. First three-port two-position pneumatic control valve; 16. Second three-port two-position pneumatic control valve; 17. Lock cylinder control valve; 18. OR valve; 19. Pressure regulating valve; 20. Pressure gauge; 21. Key valve. Detailed Implementation

[0016] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0017] The extraction tank bottom cover continuous switching control system of this utility model includes a bottom cover switching cylinder, a bottom cover locking cylinder, and a pneumatic control system.

[0018] like Figure 1As shown, the pneumatic control system includes a first channel 1, with a compressed air inlet 2 at one end. The first channel 1 is connected to an air source through the compressed air inlet 2. The first channel 1 is the main channel, providing compressed air to other branch channels. A second channel 4 and a third channel 5 are connected to the first channel 1, arranged in parallel. A first manual valve 10 is installed on the second channel 4, and a second manual valve 11 is installed on the third channel 5. The second channel 4 and the third channel 5 are respectively connected to the control ports at both ends of the switch cylinder control valve 12. The first channel 1 is connected to the bottom cover switch cylinder through the switch cylinder control valve 12, and the state of the switch cylinder control valve 12 is controlled by the second channel 4 and the third channel 5.

[0019] The switch cylinder control valve 12 is a center-closed five-port three-position pneumatic control valve. The first channel 1 is connected to the two air inlets of the five-port three-position pneumatic control valve through two one-way valves. The extension and retraction of the bottom cover switch cylinder can be controlled by the center-closed five-port three-position pneumatic control valve, thereby controlling the opening and closing of the bottom cover. Since the pneumatic control valve is a center-closed five-port three-position pneumatic control valve, when the compressed air is suddenly cut off, the center-closed five-port three-position pneumatic control valve switches to the center-closed state. Because the two exhaust ports of the pneumatic control valve are cut off, the gas at both ends of the bottom cover switch cylinder cannot be discharged. The bottom cover switch cylinder maintains its current state, and the bottom cover will not malfunction, avoiding equipment damage or personal injury.

[0020] Meanwhile, a fourth channel 6 and a fifth channel 7 are also connected to the first channel 1, and the fourth channel 6 and the fifth channel 7 are also arranged in parallel. A first three-port two-position pneumatic control valve 15 is set between the control port of the first manual valve 10 and the control port of the switch cylinder control valve 12 on the second channel 4, so that the first manual valve 10 and the first three-port two-position pneumatic control valve 15 are arranged in series. A first mechanical valve 13 is set on the fourth channel 6, and a second mechanical valve 14 and a second three-port two-position pneumatic control valve 16 are set in series on the fifth channel 7.

[0021] The first mechanical valve 13 and the second mechanical valve 14 are both roller lever type mechanical valves, installed at the corresponding positions of the bottom cover. When the bottom cover lock cylinder is opened to the position, it contacts the first mechanical valve 13, thereby connecting the first mechanical valve 13. When the bottom cover is closed, it contacts the second mechanical valve 14, thereby connecting the second mechanical valve 14.

[0022] The fourth channel 6 is connected to the control ports of the first three-port two-position pneumatic control valve 15 and the second three-port two-position pneumatic control valve 16. The state of the first three-port two-position pneumatic control valve 15 and the second three-port two-position pneumatic control valve 16 is controlled through the fourth channel 6. The fifth channel 7 is connected to the third channel 5 through the OR valve 18. The OR valve 18 is located between the control ports of the second manual valve 11 and the switch cylinder control valve 12 on the third channel 5.

[0023] The first channel 1 is connected to the bottom cover lock cylinder via the lock cylinder control valve 17. One end of the lock cylinder control valve 17 is connected to the second channel 4 via the sixth channel 8, and the other end is connected to the fifth channel 7 via the seventh channel 9. The lock cylinder control valve 17 is controlled through the sixth channel 8 and the seventh channel 9, thereby controlling the extension and retraction of the bottom cover lock cylinder.

[0024] Among them, the lock cylinder control valve 17 is a five-port two-position pneumatic priority valve. When there is compressed air of the same pressure on both ends of this pneumatic control valve, the priority end can process the action first. Compared with the traditional manually operated mechanical valve, it can avoid back pressure in the pneumatic control valve, and prevent the bottom cover lock cylinder from failing to open or close and from being damaged.

[0025] A key valve 21 is provided on the first channel 1. The key valve 21 is located in front of the second and third channels 5 which are arranged in parallel. The pneumatic control system of this utility model can only be used normally after the key valve 21 is opened, which improves the safety of this utility model and avoids misoperation.

[0026] In this embodiment, the manual valve is a flat-head push-button type manual valve.

[0027] A gas source pressure regulating filter 3 is installed on the first channel 1, and the system pressure can be adjusted through the gas source pressure regulating filter 3.

[0028] A pressure regulating valve 19 is installed on the air line connecting the switch cylinder control valve 12 and the bottom cover switch cylinder. The opening speed of the bottom cover can be changed by the pressure regulating valve 19. At the same time, pressure gauges 20 are installed on the air line connecting the switch cylinder control valve 12 and the bottom cover switch cylinder, as well as on the air line connecting the two-position pneumatic control valve and the bottom cover lock cylinder. This allows for direct and real-time observation of the pressure on the corresponding air lines, making it easier to judge the operating status of the equipment.

[0029] The usage process of this utility model is as follows:

[0030] 1. Connect the first channel 1 to the air source and start the air source. Adjust the pressure regulating filter to the appropriate pressure for the working conditions and open the key valve 21.

[0031] 2. Bottom cover opening process: Manually press the first manual valve 10 continuously to allow compressed air to pass through the first manual valve 10 to control the action of the lock cylinder control valve 17 (five-port two-position pneumatic priority valve). The air outlet of the five-port two-position pneumatic priority valve is connected to the bottom cover lock cylinder, causing the bottom cover lock to open. When the bottom cover lock cylinder is fully open, it will contact the first mechanical valve 13 (roller lever type mechanical valve), allowing compressed air to pass through the first mechanical valve 13 to control the first three-port two-position pneumatic control valve 15, thereby controlling the switch cylinder control valve 12 (center-position closed five-port three-position pneumatic control valve). Compressed air passes through the center-position closed five-port three-position pneumatic control valve and is connected to the bottom cover switch cylinder, thereby opening the bottom cover. Due to the control of the first mechanical valve 13, the second three-port two-position pneumatic control valve 16 no longer functions, and the bottom cover will remain open, allowing the operator to perform subsequent work.

[0032] 3. Bottom cover closing process: Manually press the second manual valve 11 continuously to allow compressed air to pass through the second manual valve 11 to control the center-closed five-port three-position pneumatic control valve. The compressed air then passes through the center-closed five-port three-position pneumatic control valve to connect to the bottom cover switch cylinder, thereby closing the bottom cover. When the bottom cover is closed, it will contact the second mechanical valve 14, thereby controlling the action of the lock cylinder control valve 17 (five-port two-position pneumatic priority valve), causing the bottom cover lock cylinder to actuate and the lock to close. At this time, after the lock actuates, it no longer contacts the first mechanical valve 13, so the first three-port two-position pneumatic control valve 15 no longer functions. The compressed air passes through the second mechanical valve 14 to control the second three-port two-position pneumatic control valve 16, allowing the compressed air to pass through the OR valve 18, continuously controlling the center-closed five-port three-position pneumatic control valve, keeping the bottom cover in a closed state.

Claims

1. A continuous switching control system for the bottom cover of an extraction tank, characterized in that, The system includes a bottom cover switch cylinder, a bottom cover lock cylinder, and a pneumatic control system. The pneumatic control system includes a first channel connected to an air source, a second channel and a third channel connected in parallel, a first manual valve and a first three-port two-position pneumatic control valve connected in series on the second channel, and a second manual valve on the third channel. The second and third channels are respectively connected to the control ports at both ends of the switch cylinder control valve. The first channel is connected to the bottom cover switch cylinder via the switch cylinder control valve. A fourth channel and a fifth channel are also connected in parallel to the first channel. A first mechanical valve is installed on the channel. A second mechanical valve and a second / third-port two-position pneumatic control valve are connected in series on the fifth channel. When the bottom cover lock cylinder is opened to the position, it contacts the first mechanical valve. When the bottom cover is closed, it contacts the second mechanical valve. The fourth channel is connected to the control ports of the first / third-port two-position pneumatic control valve and the second / third-port two-position pneumatic control valve. The fifth channel is connected to the third channel through an OR valve. The first channel is connected to the bottom cover lock cylinder through the lock cylinder control valve. One end of the lock cylinder control valve is connected to the second channel through the sixth channel, and the other end is connected to the fifth channel through the seventh channel.

2. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, The switch cylinder control valve is a center-closed five-port three-position pneumatic control valve. The first channel is connected to the two air inlets of the five-port three-position pneumatic control valve through two one-way valves.

3. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, The lock cylinder control valve is a five-port two-position pneumatic priority valve.

4. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, A key valve is provided on the first channel, and the key valve is located in front of the second and third channels that are arranged in parallel.

5. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, The manual valve is a flat-head push-button type manual valve.

6. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, The mechanical valve is a roller lever type mechanical valve.

7. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, A pressure regulating valve is installed in the air circuit connecting the control valve of the switch cylinder and the switch cylinder of the bottom cover.

8. The continuous switching control system for the bottom cover of the extraction tank according to claim 1, characterized in that, A gas pressure regulating filter is installed on the first channel.

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