Control system of thin film valve and tobacco primary processing equipment

Abstract

The utility model relates to a film valve technical field especially relates to a film valve's control system and tobacco leaf silk making equipment. Film valve control system includes film valve, main inlet pipe, spare inlet pipe and pressure regulating piece, and film valve includes valve body, positioner and regulating valve part, and positioner sets up with regulating valve part in valve body. One end of main inlet pipe communicates with the entrance of positioner, and the other end of main inlet pipe communicates with gas source. The export of positioner communicates with the air inlet of regulating valve part when positioner does not break down, and breaks off when positioner breaks down. One end of spare inlet pipe communicates with gas source, and the other end of spare inlet pipe communicates with air inlet when positioner breaks down. Pressure regulating piece is installed in spare inlet pipe. The positioner of film valve breaks down, and the spare inlet pipe replaces main inlet pipe and pressure regulating piece adjusts the air pressure of spare inlet pipe to accurately control the opening of film valve, guarantees tobacco leaf silk making quality and production continuity, improves tobacco leaf silk making efficiency.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm valve technology, and in particular to a control system for a diaphragm valve and a tobacco processing equipment. Background Technology

[0002] In the tobacco processing industry, to ensure that key process parameters such as moisture and temperature of the tobacco shreds meet predetermined production requirements, a series of treatments must be performed. These treatments extensively involve the precise control of the flow rate, pressure, and temperature of media such as steam and water. Diaphragm valves, as efficient and precise control elements, are widely used in the control of these media to meet the stringent requirements of the tobacco processing industry.

[0003] In actual production, tobacco processing workshops require a constant temperature and humidity environment and contain a significant amount of dust. These environmental factors can easily cause malfunctions such as zero-point drift or control failure in the diaphragm valve positioner, resulting in inaccurate control of the diaphragm valve opening. This leads to large temperature fluctuations or a sharp drop in temperature within the tobacco processing equipment, affecting the quality of tobacco processing. Furthermore, replacing the diaphragm valve takes a considerable amount of time, interrupting the continuity of tobacco processing and reducing processing efficiency. Utility Model Content

[0004] One objective of this invention is to provide a control system for a diaphragm valve, which can accurately control the opening degree of the diaphragm valve after the positioner of the diaphragm valve malfunctions, thereby improving the quality and efficiency of tobacco processing and ensuring the continuity of tobacco processing production.

[0005] Another objective of this invention is to provide a tobacco leaf processing equipment that can precisely control the opening degree of the diaphragm valve after the positioner of the diaphragm valve malfunctions, thereby improving the quality and efficiency of tobacco leaf processing and ensuring the continuity of processing production.

[0006] To achieve this objective, the technical solution adopted by this utility model is as follows:

[0007] The control system for the diaphragm valve includes:

[0008] A diaphragm valve includes a valve body, a positioner, and a regulating valve section, wherein the positioner and the regulating valve section are disposed in the valve body;

[0009] The main air intake pipe has one end connected to the inlet of the positioner and the other end connected to an air source; the outlet of the positioner is configured to be connected to the air inlet of the regulating valve when the positioner is not malfunctioning, and to be disconnected from the air inlet when the positioner malfunctions.

[0010] A backup air intake pipe, one end of which is connected to the air source, and the other end of which can be connected to the air inlet when the positioner malfunctions;

[0011] A pressure regulating component is installed on the spare air intake pipe.

[0012] As an optional solution, the control system of the diaphragm valve further includes a multi-port valve, which includes at least a first interface, a second interface and a third interface. The first interface is connected to the outlet, the second interface is connected to the air inlet, and the other end of the spare air inlet pipe is connected to the third interface.

[0013] The second interface is configured to communicate with the first interface when the locator is not malfunctioning, and to communicate with the third interface when the locator malfunctions.

[0014] As an optional solution, the multi-way valve is a pneumatic three-way valve.

[0015] As an optional solution, the control system of the diaphragm valve further includes a control module, which is communicatively connected to the multi-way valve; the control module is configured to control the second interface to connect with the first interface when the positioner is not faulty, and to control the second interface to connect with the third interface when the positioner is faulty.

[0016] As an optional feature, the control system of the diaphragm valve also includes an alarm, and the control module is communicatively connected to the alarm; the alarm is configured to issue an alarm message when the positioner malfunctions.

[0017] As an optional solution, the control system of the diaphragm valve also includes a three-way pipe, which includes a first connector, a second connector and a third connector that are interconnected. The first connector is connected to the air source, the second connector is connected to the end of the main air intake pipe away from the inlet, and the third connector is connected to the end of the backup air intake pipe away from the third interface.

[0018] As an optional solution, the control system of the diaphragm valve further includes a main vent pipe, one end of which is connected to the outlet, and the other end of which is connected to the first interface.

[0019] As an optional solution, the control system of the diaphragm valve further includes an output pipe, one end of which is connected to the second interface and the other end of which is connected to the air inlet.

[0020] As an optional solution, the pressure regulating component is a pressure regulating valve.

[0021] Tobacco processing equipment, including the control system of the aforementioned diaphragm valve.

[0022] The beneficial effects of this utility model are as follows:

[0023] The control system for the diaphragm valve proposed in this invention, by adding a backup air inlet pipe and a pressure regulating component installed on the backup air inlet pipe, allows for precise control of the diaphragm valve opening when the positioner of the diaphragm valve fails. This is achieved by using the backup air inlet pipe to replace the main air inlet pipe and adjusting the air pressure within the backup air inlet pipe via the pressure regulating component. This prevents large temperature fluctuations or a sharp drop in temperature inside the tobacco processing equipment, ensuring the quality of tobacco processing even when the positioner fails. Furthermore, by using the backup air inlet pipe to supply gas at a set pressure to the regulating valve section of the diaphragm valve, rapid switching of the gas supply channel between the gas source and the regulating valve section is achieved without replacing the diaphragm valve. This ensures the continuity of tobacco processing production, improves tobacco processing efficiency, and reduces production losses.

[0024] The tobacco leaf processing equipment proposed in this utility model includes the aforementioned control system for the diaphragm valve. When the positioner of the diaphragm valve malfunctions, the backup air inlet pipe replaces the main air inlet pipe, and the air pressure in the backup air inlet pipe is adjusted by the pressure regulating component. This achieves rapid switching of the air supply channel between the air source and the regulating valve section, so as to accurately control the opening of the diaphragm valve, avoid large temperature fluctuations or a straight drop in temperature inside the tobacco processing cylinder equipment, ensure the quality of tobacco leaf processing when the positioner malfunctions, and eliminate the need to replace the diaphragm valve, thus ensuring the continuity of tobacco leaf processing production, improving tobacco leaf processing efficiency, and reducing production losses. Attached Figure Description

[0025] Figure 1 This is a structural distribution diagram of the control system for the diaphragm valve provided in this embodiment of the utility model.

[0026] The component names and labels in the diagram are as follows:

[0027] 1. Diaphragm valve; 11. Valve body; 12. Positioner; 121. Inlet; 122. Outlet; 13. Regulating valve section; 131. Air inlet; 2. Main air inlet pipe; 3. Backup air inlet pipe; 4. Pressure regulating component; 5. Multi-way valve; a. First interface; b. Second interface; c. Third interface; 6. Control module; 7. T-connector; 8. Main air outlet pipe; 9. Output pipe; 10. Air source. Detailed Implementation

[0028] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment proposes a tobacco leaf shredding device for processing tobacco leaves into shredded tobacco. During the tobacco leaf shredding process, precise control of the flow rate, pressure, and temperature of the required media such as steam and water is necessary via a diaphragm valve to meet the stringent requirements of the shredding process.

[0034] In actual production, tobacco processing workshops require a constant temperature and humidity environment and contain a significant amount of dust. These environmental factors can easily cause malfunctions such as zero-point drift or control failure in the diaphragm valve positioner, resulting in inaccurate control of the diaphragm valve opening. This leads to large temperature fluctuations or a sharp drop in temperature within the tobacco processing equipment, affecting the quality of tobacco processing. Furthermore, replacing the diaphragm valve takes a considerable amount of time, interrupting the continuity of tobacco processing and reducing processing efficiency.

[0035] To solve the above problems, such as Figure 1As shown, this embodiment also proposes a control system for a diaphragm valve. The control system includes a diaphragm valve 1, a main air inlet pipe 2, a backup air inlet pipe 3, and a pressure regulating component 4. The diaphragm valve 1 includes a valve body 11, a positioner 12, and a regulating valve section 13. The positioner 12 and the regulating valve section 13 are disposed on the valve body 11. One end of the main air inlet pipe 2 is connected to the inlet 121 of the positioner 12, and the other end is connected to the air source 10. The outlet 122 of the positioner 12 is configured to connect to the air inlet 131 of the regulating valve section 13 when the positioner 12 is functioning correctly, and to disconnect from the air inlet 131 when the positioner 12 fails. One end of the backup air inlet pipe 3 is connected to the air source 10, and the other end of the backup air inlet pipe 3 can connect to the air inlet 131 when the positioner 12 fails. The pressure regulating component 4 is installed on the backup air inlet pipe 3. By adding a backup air inlet pipe 3 and a pressure regulating component 4 installed on the backup air inlet pipe 3, when the positioner 12 of the diaphragm valve 1 fails, the backup air inlet pipe 3 replaces the main air inlet pipe 2, and the pressure regulating component 4 adjusts the air pressure in the backup air inlet pipe 3 to precisely control the opening of the diaphragm valve 1. This avoids large temperature fluctuations or a straight drop in temperature inside the tobacco spinning equipment, ensuring the quality of tobacco spinning when the positioner 12 fails. Moreover, by using the backup air inlet pipe 3 to replace the main air inlet pipe 2 to supply gas (in this embodiment, steam) at a set pressure to the regulating valve section 13 of the diaphragm valve 1, a rapid switching of the gas supply channel between the gas source 10 and the regulating valve section 13 is achieved without replacing the diaphragm valve 1. This ensures the continuity of tobacco spinning production, improves tobacco spinning efficiency, and reduces production losses.

[0036] like Figure 1 As shown, the control system of the diaphragm valve also includes a multi-port valve 5, which includes at least a first port a, a second port b, and a third port c. The first port a is connected to the outlet 122, the second port b is connected to the inlet 131, and the other end of the backup inlet pipe 3 is connected to the third port c. The second port b is configured to connect to the first port a when the positioner 12 is functioning correctly, and to connect to the third port c when the positioner 12 fails. By setting the multi-port valve 5, the second port b can selectively connect to the first port a and the third port c, thereby enabling the switching of the air path between the main inlet pipe 2 and the backup inlet pipe 3, simplifying the air path layout between the air source 10 and the diaphragm valve 1.

[0037] When the diaphragm valve 1 is working normally, the positioner 12 is not faulty (i.e., not ineffective). The first port a is connected to the second port b, and the second port b is disconnected from the third port c. Water vapor in the air source 10 enters the positioner 12 after passing through the main air inlet pipe 2 and the inlet 121 in sequence. The positioner 12 adjusts the water vapor pressure to a preset value and then sends the pressure-adjusted water vapor through the first port a and the second port b into the regulating valve section 13. Under the action of the water vapor pressure, the regulating valve section 13 adjusts the opening of the diaphragm valve 1 to a preset opening, thereby precisely controlling the opening of the diaphragm valve 1. Since the positioner 12 and the regulating valve section 13 are both existing structures of the diaphragm valve 1, the specific structure and working principle of the positioner 12 and the regulating valve section 13 will not be described in detail. When the positioner 12 malfunctions (i.e., fails), the first interface a disconnects from the second interface b, and the second interface b connects to the third interface c. Water vapor from the gas source 10 enters the backup air inlet pipe 3. The pressure regulating component 4 adjusts the pressure of the water vapor in the backup air inlet pipe 3 to a preset value, and then the pressure-adjusted water vapor enters the regulating valve section 13 through the third interface c and the second interface b. Under the pressure of the water vapor, the regulating valve section 13 adjusts the opening of the diaphragm valve 1 to a preset opening, thereby precisely controlling the opening of the diaphragm valve 1 in the event of a positioner 12 malfunction. It should be noted that the preset opening is the opening value of the diaphragm valve 1 during the tobacco processing process, providing water vapor to the tobacco processing equipment at the preset opening to meet the requirements of the processing technology. The preset value refers to the ability of the regulating valve section 13 to adjust the opening value of the diaphragm valve 1 to the preset opening when the positioner 12 or the pressure regulating component 4 adjusts the water vapor pressure to the preset value.

[0038] In an optional embodiment, the multi-way valve 5 is a pneumatic three-way valve. The pneumatic three-way valve adopts an integrated structure, a four-sided valve seat sealing type, fewer flange connections, high reliability, and reduces the generation of sparks through inductive electrical position feedback signals to ensure the safety and reliability of operation.

[0039] like Figure 1 As shown, the control system of the diaphragm valve also includes a main outlet pipe 8 and an output pipe 9. One end of the main outlet pipe 8 is connected to the outlet 122, and the other end of the main outlet pipe 8 is connected to the first interface a. One end of the output pipe 9 is connected to the second interface b, and the other end of the output pipe 9 is connected to the inlet 131.

[0040] like Figure 1As shown, the control system of the diaphragm valve also includes a control module 6, which is communicatively connected to the multi-way valve 5. The control module 6 is configured to connect the second interface b to the first interface a when the positioner 12 is functioning correctly, and to connect the second interface b to the third interface c when the positioner 12 fails. Automatic control of the multi-way valve 5 is achieved through the control module 6, thereby connecting the second interface b to either the first interface a or the third interface c. The control module 6 and the multi-way valve 5 are communicatively connected via a wiring harness, and the control module 6 outputs a 24V signal to the multi-way valve 5 when the positioner 12 fails, connecting the second interface b to the third interface c of the multi-way valve 5 for precise control.

[0041] Specifically, the control module 6 can acquire the actual opening degree of the diaphragm valve 1 and compare it with the preset opening degree of the diaphragm valve 1. If the difference between the actual opening degree and the preset opening degree falls within ±5%, it is determined that the positioner 12 has not malfunctioned; if the difference between the actual opening degree and the preset opening degree does not fall within ±5%, it is determined that the positioner 12 has malfunctioned, and the control module 6 controls the second interface b and the third interface c of the multi-way valve 5 to connect, so as to replace the main air intake pipe 2 through the spare air intake pipe 3 to realize the air path switching. The control module 6 is a conventional component of the diaphragm valve control system, and the working process of the control module 6 will not be described in detail.

[0042] In an optional embodiment, the control system of the diaphragm valve further includes an alarm (not shown in the figure), and the control module 6 is communicatively connected to the alarm. The alarm is configured to issue an alarm message when the positioner 12 malfunctions. Specifically, when the positioner 12 malfunctions, the control module 6 outputs an alarm signal (e.g., image, text, letter, or other symbols) to the monitoring screen of the industrial control computer, and simultaneously controls the alarm to issue an audible and visual alarm to remind the operator to intervene and operate the pressure regulating component 4 in a timely manner.

[0043] In this embodiment, the pressure regulating component 4 is a pressure regulating valve, which facilitates manual pressure adjustment by the operator. When the positioner 12 is not malfunctioning, the pressure regulating component 4 is in the open state and adjusts the air pressure in the backup air intake pipe 3 to the initial value, so that if the positioner 12 malfunctions, the water vapor in the backup air intake pipe 3 can enter the regulating valve section 13 in a timely manner.

[0044] It should be noted that when the positioner 12 malfunctions and the second port b of the multi-way valve 5 is connected to the third port c, the water vapor (at the initial pressure) in the backup air intake pipe 3 enters the regulating valve section 13, and the regulating valve section 13 controls the opening of the diaphragm valve 1 to 60%. Then, according to the preset opening of the diaphragm valve 1, the pressure regulating valve is manually adjusted to adjust the air pressure entering the regulating valve section 13 until the actual opening of the diaphragm valve 1 reaches the preset opening.

[0045] like Figure 1As shown, the control system of the diaphragm valve also includes a three-way pipe 7. The three-way pipe 7 includes a first connector, a second connector, and a third connector that are interconnected. The first connector is connected to the air source 10, the second connector is connected to the end of the main air intake pipe 2 away from the inlet 121, and the third connector is connected to the end of the backup air intake pipe 3 away from the third interface c. By setting up the three-way pipe 7, the main air intake pipe 2 and the backup air intake pipe 3 are connected in parallel. The air source 10 supplies water vapor to the main air intake pipe 2 and the backup air intake pipe 3 respectively through the three-way pipe 7, simplifying the air path layout between the air source 10 and the diaphragm valve 1.

[0046] For ease of understanding, the detailed working process of the diaphragm valve control system is as follows:

[0047] When the diaphragm valve 1 is operating normally, the positioner 12 is functioning correctly. At this time, the first port a and the second port b of the multi-way valve 5 are connected. The air source 10 supplies steam to the positioner 12 through the main air inlet pipe 2. After pressure regulation within the positioner 12, the steam passes sequentially through the main air outlet pipe 8, the first port a, the second port b, and the output pipe 9, finally entering the regulating valve section 13 through the air inlet 131. This regulating valve section 13 adjusts the actual opening of the diaphragm valve 1 to the preset opening. Simultaneously, the control module 6 collects the actual opening of the diaphragm valve 1 in real time and compares it with the preset opening. If the difference between the actual and preset opening falls within ±5%, the positioner 12 is determined to be functioning correctly; otherwise, it is determined to be faulty. At this time, the control module 6 outputs an alarm signal and controls the alarm device to trigger an alarm message, alerting the operator to intervene promptly. Simultaneously, the control module 6 outputs a 24V signal to the multi-way valve 5 to connect the second port b and the third port c of the multi-way valve 5, while disconnecting the first port a from the second port b. The air source 10 supplies water vapor to the regulating valve section 13 through the spare air inlet pipe 3, thus achieving air path switching. According to the preset opening degree of the diaphragm valve 1, the pressure regulating valve is manually adjusted to regulate the air pressure entering the regulating valve section 13 until the actual opening degree of the diaphragm valve 1 reaches the preset opening degree.

[0048] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A control system for a diaphragm valve, characterized in that, include: A diaphragm valve (1) includes a valve body (11), a positioner (12), and a regulating valve section (13), wherein the positioner (12) and the regulating valve section (13) are disposed on the valve body (11); A main air intake pipe (2) is provided, one end of which is connected to the inlet (121) of the positioner (12) and the other end of which is connected to the air source (10). The outlet (122) of the positioner (12) is configured to be connected to the air inlet (131) of the regulating valve section (13) when the positioner (12) is not malfunctioning, and to be disconnected from the air inlet (131) when the positioner (12) malfunctions. A backup air intake pipe (3) is provided, one end of which is connected to the air source (10), and the other end of which can be connected to the air inlet (131) when the positioner (12) malfunctions. Pressure regulating component (4) is installed on the spare air intake pipe (3).

2. The control system for the diaphragm valve according to claim 1, characterized in that, The control system of the diaphragm valve also includes a multi-port valve (5), which includes at least a first port (a), a second port (b) and a third port (c). The first port (a) is connected to the outlet (122), the second port (b) is connected to the air inlet (131), and the other end of the spare air inlet pipe (3) is connected to the third port (c). The second interface (b) is configured to communicate with the first interface (a) when the locator (12) is not malfunctioning, and to communicate with the third interface (c) when the locator (12) is malfunctioning.

3. The control system for the diaphragm valve according to claim 2, characterized in that, The multi-way valve (5) is a pneumatic three-way valve.

4. The control system for the diaphragm valve according to claim 2, characterized in that, The control system of the diaphragm valve further includes a control module (6), which is communicatively connected to the multi-way valve (5); the control module (6) is configured to control the second interface (b) to connect with the first interface (a) when the positioner (12) is not faulty, and to control the second interface (b) to connect with the third interface (c) when the positioner (12) is faulty.

5. The control system for the diaphragm valve according to claim 4, characterized in that, The control system of the diaphragm valve also includes an alarm, and the control module (6) is communicatively connected to the alarm; the alarm is configured to issue an alarm message when the positioner (12) malfunctions.

6. The control system for the diaphragm valve according to claim 2, characterized in that, The control system of the diaphragm valve also includes a three-way pipe (7), which includes a first connector, a second connector and a third connector that are interconnected. The first connector is connected to the air source (10), the second connector is connected to the end of the main air intake pipe (2) away from the inlet (121), and the third connector is connected to the end of the backup air intake pipe (3) away from the third interface (c).

7. The control system for the diaphragm valve according to claim 2, characterized in that, The control system of the diaphragm valve also includes a main air outlet pipe (8), one end of which is connected to the outlet (122), and the other end of which is connected to the first interface (a).

8. The control system for the diaphragm valve according to claim 2, characterized in that, The control system of the diaphragm valve also includes an output pipe (9), one end of which is connected to the second interface (b), and the other end of which is connected to the air inlet (131).

9. The control system for the diaphragm valve according to any one of claims 1 to 8, characterized in that, The pressure regulating component (4) is a pressure regulating valve.

10. Tobacco leaf processing equipment, characterized in that, A control system including the diaphragm valve according to any one of claims 1 to 9.

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