Constant-voltage and constant-current control system of stoving device

Abstract

The utility model discloses a constant-pressure and constant-flow control system for a stoving device, which comprises the stoving device, a constant-pressure control system and a constant-flow control system, wherein a nozzle of the stoving device is provided with a switching valve and a digital regulating valve; the conveying pump is used for conveying the clarified mixed juice in the clarified mixed juice container to the stoving device; a flow meter and a pressure transmitter are arranged on the conveying pipeline and are electrically connected with the control module; the digital valve controller is electrically connected with the digital regulating valve and the control module; the electromagnetic valve control module is electrically connected with the switch valve and the control module; and the control module is used for receiving the detected data and controlling the digital valve controller, the electromagnetic valve control module and the conveying pump. According to the utility model, the digital valve controller and the electromagnetic valve control module are utilized to adjust the pressure of the stoving device, the flowmeter and the pressure transmitter are matched to detect the flow and the pressure, and the controller controls the delivery pump, so that the stability of the flow of the clarified mixed juice and the stability of the pressure of the stoving device are ensured, and the utility model belongs to the technical field of stoving device control.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfur fumigator control, and particularly relates to a constant pressure and constant current control system for a sulfur fumigator. Background Art

[0002] During the production process of the sugar factory, the mixed juice must go through the sulfur fumigation process. The requirement of this process is to ensure the pressure stability of the sulfur fumigator. However, due to the production conditions of the sugar factory, it is difficult to ensure the stability of the incoming materials, that is, it is difficult to ensure the stability of the flow of the clarified mixed juice transported to the sulfur fumigator. Therefore, the pressure stability cannot be guaranteed, which affects the process indicators. Utility Model Content

[0003] The utility model aims to provide a constant pressure and constant flow control system for a sulfur fumigator, so as to solve the problem that the existing sulfur fumigation process cannot ensure the stability of the flow of clarified mixed juice transported to the sulfur fumigator due to the working conditions of the sugar factory production, so the pressure stability cannot be guaranteed, which affects the process indicators.

[0004] The specific technical solutions are as follows:

[0005] A constant pressure and constant current control system for a sulfur fumigator, comprising:

[0006] The sulfur fumigator comprises a central nozzle and peripheral nozzles arranged around the central nozzle, the peripheral nozzles are provided with switch valves, and the central nozzle is provided with a digital regulating valve;

[0007] A clarified mixed juice container, used for placing clarified mixed juice;

[0008] A delivery pump, which can deliver the clarified mixed juice in the clarified mixed juice container to the sulfur fumigator. A flow meter and a pressure transmitter are provided between the delivery pump and the sulfur fumigator. Both the flow meter and the pressure transmitter are electrically connected to the control module.

[0009] A digital valve controller, the digital valve controller is electrically connected to the digital regulating valve, and the digital valve controller is electrically connected to the control module;

[0010] A solenoid valve control module, the solenoid valve control module is electrically connected to the switch valve, and the solenoid valve control module is electrically connected to the control module;

[0011] The control module is used to receive data detected by the flow meter and the pressure transmitter, and to control the digital valve controller, the solenoid valve control module and the delivery pump.

[0012] Preferably, the control module includes a PLC controller and a frequency converter. The PLC controller is used to receive data detected by the flow meter and the pressure transmitter. The PLC controller is also used to control the digital valve controller and the solenoid valve control module. The frequency converter and the PLC controller are electrically connected, and the frequency converter is electrically connected to the delivery pump.

[0013] Preferably, the clarified mixed juice container is provided with a liquid level transmitter, which is used to detect the liquid level of the clarified mixed juice container, and the liquid level transmitter is electrically connected to the control module.

[0014] Preferably, the delivery pump is connected to the clarified mixed juice container through a first delivery pipeline, the delivery pump is connected to the first delivery pipeline through a flange, the delivery pump is connected to the sulfur fumigator through a second delivery pipeline, and the delivery pump is connected to the second delivery pipeline through a flange; the flow meter and the pressure transmitter are both arranged in the second delivery pipeline.

[0015] Preferably, the PLC controller is electrically connected to a display touch screen.

[0016] Preferably, the inverter power supply voltage is 380V.

[0017] Preferably, the clarified mixed juice container is a cubic structure or a cylindrical structure, the top of the clarified mixed juice container is provided with an openable and closable liquid inlet, and the side wall of the clarified mixed juice container is provided with a liquid outlet.

[0018] Compared with the existing technology, the utility model has the following beneficial effects:

[0019] The utility model discloses a constant pressure and constant current control system for a sulfur fumigator. The control module is used to control a digital valve controller and a solenoid valve control module. The digital valve controller and the solenoid valve control module are used to control the opening of a digital regulating valve and the switching state of a switch valve respectively. The solenoid valve control module controls the switching state of the switch valve to roughly adjust the pressure of the sulfur fumigator. The digital valve controller controls the opening of the digital regulating valve to finely adjust the pressure of the sulfur fumigator, thereby adjusting the pressure of the sulfur fumigator and ensuring the stability of the pressure of the sulfur fumigator. By arranging a flow meter and a pressure transmitter between the delivery pump and the sulfur fumigator, the flow rate and pressure of the clarified mixed juice delivered by the delivery pump are detected, and then the corresponding data are fed back to the control module. The control module controls the operating frequency of the delivery pump to ensure the stability of the mixed juice flow entering the sulfur fumigation neutralizer, meet the requirements of the production process, and improve product quality and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 The figure is a schematic diagram of a constant pressure and constant current control system of a sulfur fumigator.

[0022] Description of main reference numerals:

[0023] 1 is a clarified mixed juice container, 2 is a liquid level transmitter, 3 is a delivery pump, 4 is a frequency converter, 5 is a flow meter, 6 is a display touch screen, 7 is a PLC controller, 8 is a solenoid valve control module, 9 is a digital valve controller, 10 is a pressure transmitter, 11 is a digital regulating valve, 12 is a switch valve, 13 is a sulfur fumigator, and 14 is sulfur dioxide. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0028] like Figure 1As shown, this embodiment provides a constant pressure and constant current control system for a sulfur fumigator, comprising:

[0029] The sulfur fumigator 13 comprises a central nozzle and peripheral nozzles arranged around the central nozzle, the peripheral nozzles are provided with a switch valve 12, and the central nozzle is provided with a digital regulating valve 11; the sulfur fumigator 13 is an existing sulfur fumigator, and some products are also called sulfur fumigation neutralizers, which utilize the central nozzle and the peripheral nozzles to generate high-speed jets to form negative pressure, thereby increasing the amount of sulfur dioxide 14 gas inhaled, and cooperates with the switch valve 12 and the digital regulating valve 11 to control the switch state and the opening size of the peripheral nozzle and the central nozzle respectively, so as to achieve constant pressure and constant flow process conditions; wherein the switch valve 12 has a lower precision than the digital regulating valve 11, so that the switch state of the switch valve 12 can only realize coarse adjustment of the pressure, and the digital regulating valve 11 is used to finely adjust the pressure after coarse adjustment, and they cooperate with each other to ensure the pressure stability of the sulfur fumigator 13, and compared with the existing sulfur fumigator 13 having only the switch valve 12 and the ordinary regulating valve to adjust the pressure structure, the effect is better and the pressure size can be adjusted more accurately.

[0030] The clarified mixed juice container 1 is used for placing clarified mixed juice; the clarified mixed juice is the mixed juice squeezed by the receiving sugar factory and formed after adding phosphoric acid.

[0031] The delivery pump 3 can deliver the clarified mixed juice in the clarified mixed juice container 1 to the sulfur fumigator 13. A flow meter 5 and a pressure transmitter 10 are provided between the delivery pump 3 and the sulfur fumigator 13. The flow meter 5 and the pressure transmitter 10 are both electrically connected to the control module. The flow meter 5 is an existing flow meter 5, and the pressure transmitter 10 is an existing transmitter.

[0032] Digital valve controller 9, digital valve controller 9 is electrically connected to digital regulating valve 11, and digital valve controller 9 is electrically connected to control module; digital regulating valve 11 is a device that realizes pressure regulation by digital control technology. It controls the opening of the valve by electronic signal or digital IO mode, so as to accurately adjust the output pressure. The following is a detailed introduction to digital regulating valve 11: digital regulating valve 11 usually includes electric actuator and a valve position output device, which and digital valve controller form a precise valve regulation system. The sensor monitors the output pressure and converts it into a digital signal. The controller adjusts the opening of the valve according to the set target pressure to keep the output pressure at the required level. Digital regulating valve 11 has a high regulation accuracy of up to ±0.1%, a fast pressure regulation response speed, can quickly adjust the pressure, a stable pressure regulation process, a small drift, good pressure characteristics, up to ±1kPa, compared with the traditional mechanical regulating valve, digital regulating valve 11 has a simpler structure, a low failure rate, and more convenient maintenance.

[0033] The solenoid valve control module 8 is electrically connected to the switch valve 12, and the solenoid valve control module 8 is electrically connected to the control module;

[0034] A control module, which is used to receive data detected by the flow meter 5 and the pressure transmitter 10 , and to control the digital valve controller 9 , the solenoid valve control module 8 and the delivery pump 3 .

[0035] The constant pressure and constant current control system of the sulfur fumigator provided in this embodiment uses a control module to control a digital valve controller 9 and a solenoid valve control module 8, and uses the digital valve controller 9 and the solenoid valve control module 8 to control the opening of the digital regulating valve 11 and the switching state of the switch valve 12 respectively, wherein the solenoid valve control module 8 controls the switching state of the switch valve 12 to roughly adjust the pressure of the sulfur fumigator 13, and the digital valve controller 9 controls the opening of the digital regulating valve 11 to finely adjust the pressure of the sulfur fumigator 13, thereby adjusting the pressure of the sulfur fumigator 13 and ensuring the stability of the pressure of the sulfur fumigator 13; by arranging a flow meter 5 and a pressure transmitter 10 between the delivery pump 3 and the sulfur fumigator 13, the flow rate and pressure of the clarified mixed juice delivered by the delivery pump 3 are detected, and then the corresponding data are fed back to the control module, and the control module controls the operating frequency of the delivery pump 3 to ensure the stability of the mixed juice flow entering the sulfur fumigation neutralizer and meet the requirements of the production process.

[0036] In some embodiments, the control module includes a PLC controller 7 and a frequency converter 4. The PLC controller 7 is used to receive data detected by the flow meter 5 and the pressure transmitter 10. The PLC controller 7 is also used to control the digital valve controller 9 and the solenoid valve control module 8. The frequency converter 4 is electrically connected to the PLC controller 7, and the frequency converter 4 is electrically connected to the delivery pump 3. The power supply voltage connected to the frequency converter 4 and the delivery pump 3 is the same, and the frequency converter 4 and the delivery pump 3 are connected. The frequency converter 4 is a 380V frequency converter 4, and the delivery pump 3 is a three-phase 380V. During use, the frequency converter 4 is powered by the three-phase 380V, and the frequency converter 4 outputs three-phase electricity to the delivery pump 3. By adjusting the frequency of the frequency converter 4, the flow rate delivered by the delivery pump 3 can be accurately controlled.

[0037] In some embodiments, the clarified mixed juice container 1 is provided with a liquid level transmitter 2, which is used to detect the liquid level of the clarified mixed juice container 1, and the liquid level transmitter 2 is electrically connected to the control module. The liquid level transmitter 2 is used to detect the relative height of the clarified mixed juice level in the clarified mixed juice container 1, and the liquid level transmitter can be: a pressure type liquid level transmitter, a differential pressure type liquid level transmitter, an ultrasonic level transmitter, a laser level transmitter, and a radar level transmitter. Due to the different liquid levels, the same speed of the delivery pump 3 delivers different flow rates. By setting the liquid level transmitter 2 to detect the relative height of the liquid level to the control module, it is convenient for the control module to control the frequency converter 4 according to different liquid levels, and by adjusting the frequency of the frequency converter 4, the flow rate delivered by the delivery pump 3 can be accurately controlled.

[0038] In some embodiments, the delivery pump 3 is connected to the clarified mixed juice container 1 through a first delivery pipeline, the delivery pump 3 is connected to the first delivery pipeline through a flange, the delivery pump 3 is connected to the sulfur fumigator 13 through a second delivery pipeline, and the delivery pump 3 is connected to the second delivery pipeline through a flange. By setting a connecting flange to connect with the delivery pipeline, it is ensured that there is no leakage at the connection of the pipeline.

[0039] In some embodiments, the PLC controller 7 is electrically connected to a display touch screen 6. By providing the display touch screen 6, it is convenient for the user to directly perform control operations through the display touch screen 6.

[0040] In some embodiments, the clarified mixed juice container 1 is a cubic structure or a cylindrical structure, an openable liquid inlet is provided on the top of the clarified mixed juice container 1, and a liquid outlet is provided on the side wall of the clarified mixed juice container 1. Specifically, the clarified mixed juice container 1 is a cubic structure, which is hollow inside, and the liquid inlet is connected to the clarified mixed juice conveying pipeline of the previous process through a pipeline flange.

[0041] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A constant pressure and constant current control system for a sulfur fumigator, characterized in that: include: The sulfur fumigator comprises a central nozzle and peripheral nozzles arranged around the central nozzle, the peripheral nozzles are provided with switch valves, and the central nozzle is provided with a digital regulating valve; A clarified mixed juice container, used for placing clarified mixed juice; A delivery pump, which can deliver the clarified mixed juice in the clarified mixed juice container to the sulfur fumigator. A flow meter and a pressure transmitter are provided between the delivery pump and the sulfur fumigator. Both the flow meter and the pressure transmitter are electrically connected to the control module. A digital valve controller, the digital valve controller is electrically connected to the digital regulating valve, and the digital valve controller is electrically connected to the control module; A solenoid valve control module, the solenoid valve control module is electrically connected to the switch valve, and the solenoid valve control module is electrically connected to the control module; The control module is used to receive data detected by the flow meter and the pressure transmitter, and to control the digital valve controller, the solenoid valve control module and the delivery pump.

2. A constant pressure and constant current control system for a sulfur fumigator according to claim 1, characterized in that: The control module includes a PLC controller and a frequency converter. The PLC controller is used to receive data detected by the flow meter and the pressure transmitter. The PLC controller is also used to control the digital valve controller and the solenoid valve control module. The frequency converter is electrically connected to the PLC controller, and the frequency converter is electrically connected to the delivery pump.

3. A constant pressure and constant current control system for a sulfur fumigator according to claim 1, characterized in that: The clarified mixed juice container is provided with a liquid level transmitter, which is used to detect the liquid level of the clarified mixed juice container, and the liquid level transmitter is electrically connected to the control module.

4. A constant pressure and constant current control system for a sulfur fumigator according to claim 1, characterized in that: The delivery pump is connected to the clarified mixed juice container through a first delivery pipeline, the delivery pump is connected to the first delivery pipeline through a flange, the delivery pump is connected to the sulfur fumigator through a second delivery pipeline, and the delivery pump is connected to the second delivery pipeline through a flange; the flow meter and the pressure transmitter are both arranged in the second delivery pipeline.

5. A constant pressure and constant current control system for a sulfur fumigator according to claim 2, characterized in that: The PLC controller is electrically connected to a display touch screen.

6. A constant pressure and constant current control system for a sulfur fumigator according to claim 2, characterized in that: The inverter power supply voltage is 380V.

7. A constant pressure and constant current control system for a sulfur fumigator according to claim 1, characterized in that: The clarified mixed juice container is a cubic structure or a cylindrical structure. The top of the clarified mixed juice container is provided with an openable and closable liquid inlet, and the side wall of the clarified mixed juice container is provided with a liquid outlet.

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