Control system and control method of oxygen pressure regulating station

Abstract

Embodiments of the present application provide a control system and a control method of an oxygen pressure regulating station, and relate to the technical field of oxygen pipeline pressure regulating. The system comprises a pressure acquisition unit configured to acquire a first pressure signal of a first oxygen pipeline, a second pressure signal of a second oxygen pipeline, and a third pressure signal of a third oxygen pipeline; a first control unit connected to the pressure acquisition unit, configured to receive the first pressure signal and the second pressure signal, and generate a first control signal output to the first oxygen pipeline and a second control signal output to the second oxygen pipeline; and a second control unit connected to the pressure acquisition unit, configured to receive the second pressure signal and the third pressure signal, and generate a third control signal output to the third oxygen pipeline. The system controls the oxygen pressure regulating station through two control units, and solves the gas pressure loss accident caused by the oxygen pressure regulating station out of control due to controller failure.

Description

Technical Field

[0001] This application relates to the field of oxygen pipeline pressure regulation technology, and more specifically, to a control system and a control method for an oxygen pressure regulating station. Background Technology

[0002] Oxygen pressure regulating stations are crucial facilities in the steel production process, ensuring stable pressure and flow in downstream oxygen pipelines. Typically, an oxygen pressure regulating station uses a control system to centrally regulate and control the pressure regulating valves of its various branches. This is achieved by connecting the pressure of the downstream oxygen pipelines to the control system via pressure transmitters. The control system uses pressure controller logic configuration to compare the system set pressure with the pipeline input pressure and outputs control signals. These signals are transmitted to valve positioners, which drive valve transmission mechanisms to control the opening of each branch pressure regulating valve in the oxygen pressure regulating station. This ensures that the downstream oxygen pipeline pressure tracks the set pressure value of the control system, thus stabilizing the downstream oxygen pipeline pressure. However, if the oxygen pressure regulating station control system experiences a power outage during production, all branch pressure regulating valves will lose control and close completely. This will cause a continuous drop in the downstream oxygen pipeline pressure, leading to the shutdown of the steelmaking converter and potentially causing an oxygen lance backfire. Moreover, when the pressure regulating station control system recovers from a malfunction and the oxygen pressure difference across the pressure regulating valve increases, the oxygen flow rate exceeds the limit at the moment the pressure regulating valve opens, causing debris in the pipeline to rub against the pipeline violently and ignite, resulting in a major pipeline explosion accident. Summary of the Invention

[0003] The embodiments of this application provide a control system for an oxygen pressure regulating station and a control method for an oxygen pressure regulating station. The control system optimizes the control of the pressure regulating valves of the branch pipelines of the oxygen pressure regulating station to ensure the stability of the pressure and flow of oxygen pipelines for downstream users and to guarantee the safe operation and production of the oxygen pipeline network.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the embodiments of this application, a control system for an oxygen pressure regulating station is provided, the oxygen pressure regulating station including a first oxygen pipeline, a second oxygen pipeline, and a third oxygen pipeline, the control system including:

[0006] The pressure acquisition unit is used to acquire the first pressure signal of the first oxygen pipeline, the second pressure signal of the second oxygen pipeline, and the third pressure signal of the third oxygen pipeline.

[0007] The first control unit is connected to the pressure acquisition unit and is used to receive the first pressure signal and the second pressure signal, generate a first control signal and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline.

[0008] The second control unit is connected to the pressure acquisition unit and is used to receive the second pressure signal and the third pressure signal, and generate a third control signal to output to the third oxygen pipeline.

[0009] In some embodiments of this application, based on the foregoing scheme, the pressure acquisition unit includes:

[0010] The first pressure acquisition subunit is installed on the first oxygen pipeline and is used to acquire the first pressure signal of the first oxygen pipeline.

[0011] The second pressure acquisition subunit is installed on the second oxygen pipeline and is used to acquire the second pressure signal of the second oxygen pipeline.

[0012] The third pressure acquisition subunit is installed on the third oxygen pipeline and is used to acquire the third pressure signal of the third oxygen pipeline.

[0013] In some embodiments of this application, based on the aforementioned scheme, the first pressure acquisition subunit, the second pressure acquisition subunit, and the third pressure acquisition subunit all use pressure transmitters.

[0014] In some embodiments of this application, based on the foregoing scheme, the pressure transmitter is any one of a piezoresistive transmitter, a piezoelectric transmitter, or a capacitive transmitter.

[0015] In some embodiments of this application, based on the foregoing scheme, the first control unit includes:

[0016] A first signal comparator is connected to the first pressure acquisition subunit and the second pressure acquisition subunit. It is used to receive a first pressure signal and a second pressure signal, compare the received first pressure signal and the second pressure signal, and output the signal with the larger value as the first comparison signal.

[0017] A first pressure controller, connected to the first signal comparator, is used to receive the first comparison signal, generate a first control signal based on the first comparison signal and a set pressure, and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline.

[0018] In some embodiments of this application, based on the foregoing scheme, the second control unit includes:

[0019] The second signal comparator is connected to the second pressure acquisition subunit and the third pressure acquisition subunit. It is used to receive the second pressure signal and the third pressure signal, compare the received second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal.

[0020] The second pressure controller, connected to the second signal comparator, is used to receive the second comparison signal and generate a third control signal based on the second comparison signal and the set pressure, which is then output to the third oxygen pipeline.

[0021] In some embodiments of this application, based on the foregoing scheme, the first pressure controller and the second pressure controller are selected as electronic pressure controllers.

[0022] According to a second aspect of the embodiments of this application, a control method for an oxygen pressure regulating station is provided, the oxygen pressure regulating station including a first oxygen pipeline, a second oxygen pipeline, and a third oxygen pipeline, the method comprising:

[0023] The pressure information of the first oxygen pipeline, the second oxygen pipeline, and the third oxygen pipeline is collected and used as the first pressure signal, the second pressure signal, and the third pressure signal, respectively.

[0024] The first pressure signal and the second pressure signal are compared, and the signal with the larger value between the two is output as the first comparison signal.

[0025] And compare the second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal;

[0026] Based on the first comparison signal and the first set pressure, control the first oxygen pipeline and the second oxygen pipeline;

[0027] The third oxygen pipeline is controlled based on the second comparison signal and the second set pressure.

[0028] In some embodiments of this application, based on the foregoing scheme, the step of controlling the first oxygen pipeline and the second oxygen pipeline based on the first comparison signal and the first set pressure includes:

[0029] When the first pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the first oxygen pipeline is controlled to close.

[0030] When the first pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the first oxygen pipeline is controlled to open.

[0031] When the second pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the second oxygen pipeline is controlled to close.

[0032] When the second pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the second oxygen pipeline is controlled to open.

[0033] In some embodiments of this application, based on the foregoing scheme, the step of controlling the third oxygen pipeline based on the second comparison signal and the second set pressure includes:

[0034] When the second comparison signal is greater than the second set pressure, the third oxygen pipeline is shut off.

[0035] When the second comparison signal is less than the second set pressure, the third oxygen pipeline is opened.

[0036] The technical solution of this application sets up two control units to control the oxygen pipeline of the oxygen pressure regulating station, thereby solving the problem of oxygen pipeline interruption and pressure loss accidents caused by the loss of control of the oxygen pressure regulating station due to controller failure, and enhancing the safety and stability of the operation of the oxygen pressure regulating station.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0039] Figure 1 A block diagram of a control system for an oxygen pressure regulating station according to one embodiment of this application is shown;

[0040] Figure 2 A schematic diagram of an oxygen pressure regulating station according to an embodiment of this application is shown;

[0041] Figure 3 A schematic diagram of the installation of a pressure transmitter according to an embodiment of this application is shown;

[0042] Figure 4 A connection diagram is shown of a control system for an oxygen pressure regulating station according to an embodiment of this application, when the oxygen pressure regulating station is controlled.

[0043] Figure 5A schematic flowchart of a control method for an oxygen pressure regulating station according to an embodiment of this application is shown. Detailed Implementation

[0044] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0045] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0046] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] The following detailed description of some embodiments of this application will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] See Figure 1The diagram shows a structural schematic of a control system for an oxygen pressure regulating station according to an embodiment of this application.

[0051] like Figure 1 As shown, a control system 100 for an oxygen pressure regulating station is illustrated, specifically including:

[0052] The pressure acquisition unit 101 is used to acquire the first pressure signal of the first oxygen pipeline, the second pressure signal of the second oxygen pipeline, and the third pressure signal of the third oxygen pipeline; the first control unit 102 is connected to the pressure acquisition unit and is used to receive the first pressure signal and the second pressure signal, generate a first control signal and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline; the second control unit 103 is connected to the pressure acquisition unit and is used to receive the second pressure signal and the third pressure signal, and generate a third control signal and output it to the third oxygen pipeline.

[0053] It should be noted that the structure of the oxygen pressure regulating station controlled by the control system 100 provided in this embodiment is as follows: Figure 2 As shown, the oxygen pressure regulating station includes a first oxygen pipeline, a second oxygen pipeline, and a third oxygen pipeline; the first oxygen pipeline is sequentially equipped with a first shut-off valve V11, a first pressure regulating valve PV111, and a second shut-off valve V12; the second oxygen pipeline is sequentially equipped with a third shut-off valve V21, a second pressure regulating valve PV211, and a fourth shut-off valve V22; and the third oxygen pipeline is sequentially equipped with a fifth shut-off valve V31, a third pressure regulating valve PV311, and a second shut-off valve V32.

[0054] In this embodiment, the first control unit 102 outputs a first control signal to the first pressure regulating valve PV111 to control the opening / closing of the first pressure regulating valve PV111, and outputs a second control signal to the second pressure regulating valve PV211 to control the opening / closing of the second pressure regulating valve PV211. The second control unit 103 outputs a third control signal to the third pressure regulating valve PV311 to control the opening / closing of the third pressure regulating valve PV111.

[0055] The high-pressure oxygen delivered via the air separation high-pressure oxygen pipeline enters the oxygen pressure regulating station and then enters the first, second, and third oxygen pipelines before being output to the downstream user's oxygen pipeline.

[0056] It is understandable that the first control unit 102 and the second control unit 103 jointly realize the pressure control of the first oxygen pipeline, the second oxygen pipeline and the third oxygen pipeline. When one of the control units loses control and malfunctions, the other control unit can still issue normal control commands to ensure that at least one of the three oxygen pipelines is in a normal state, thereby stabilizing the pressure of the downstream user's oxygen pipeline and improving the safety of oxygen pipeline operation.

[0057] In some feasible embodiments, the pressure acquisition unit 101 includes:

[0058] A first pressure acquisition subunit is installed on the first oxygen pipeline to acquire a first pressure signal from the first oxygen pipeline; a second pressure acquisition subunit is installed on the second oxygen pipeline to acquire a second pressure signal from the second oxygen pipeline; and a third pressure acquisition subunit is installed on the third oxygen pipeline to acquire a third pressure signal from the third oxygen pipeline.

[0059] Understandably, the first, second, and third pressure acquisition subunits need to collect pressure information from the three oxygen pipelines during the transmission of high-pressure oxygen. This information is used by the first and second control units to make judgments based on the pressure information from the oxygen pipelines and then issue control commands to adjust the pressure in the three pipelines, thereby ensuring the stability of the oxygen pipeline pressure for downstream users.

[0060] In some feasible embodiments, the first pressure acquisition subunit, the second pressure acquisition subunit, and the third pressure acquisition subunit are all selected from pressure transmitters.

[0061] It should be noted that a pressure transmitter is a device that converts pressure into pneumatic or electrical signals for control and remote transmission. It can convert the physical pressure parameters of gases, liquids, etc., sensed by the pressure sensing element sensor into standard electrical signals (such as 4-20mA DC), which are then supplied to secondary instruments such as indicators, alarms, recorders, and controllers for measurement, indication, and process regulation.

[0062] like Figure 3 As shown, in this embodiment, three pressure transmitters P11, P21, and P31 are respectively installed between the first pressure regulating valve PV111 and the second shut-off valve V12, between the second pressure regulating valve PV211 and the fourth shut-off valve V22, and between the third pressure regulating valve PV311 and the second shut-off valve V32. These transmitters are used to obtain pipeline pressure information after pressure regulation, so as to determine whether the pressure of the first oxygen pipeline, the second oxygen pipeline, and the third oxygen pipeline after being controlled by the first control signal, the second control signal, and the third control signal meets the standard, and then determine whether it is necessary to continue to adjust the pressure in the oxygen pipeline.

[0063] In some feasible embodiments, the pressure transmitter is any one of a piezoresistive transmitter, a piezoelectric transmitter, or a capacitive transmitter.

[0064] Piezoresistive transmitters apply pressure to the front surface of a diaphragm. Under pressure, the diaphragm will deform to a certain extent. A thick film resistor is printed on the back of the pressure-sensing diaphragm, which forms a Wheatstone bridge. Under the piezoresistive effect, the bridge will generate a corresponding voltage signal, which is directly proportional to the excitation voltage.

[0065] Piezoelectric transmitters are developed using the positive piezoelectric effect. The positive piezoelectric effect occurs when an external force is applied to an electrolyte, causing it to deform. This results in polarization within the electrolyte, generating positive and negative charges on its two surfaces. When the external force is removed, the electrolyte returns to its uncharged state. The polarity of the charges changes with the direction of the applied force.

[0066] Capacitive transmitters are divided into two types: electric and pneumatic. The former uses a DC signal as its standardized input signal, while the latter outputs a gas pressure signal. The two pressures of the measured medium are input into high and low pressure chambers, respectively, acting on the insulating diaphragms on both sides of the sensing element. The measuring diaphragm and the electrodes on the insulating sheets on both sides form a capacitor. When the pressures on both sides differ, the module will shift, resulting in different currents on both sides. Under oscillation and regulation, this generates current, voltage, or digital output signals.

[0067] In some feasible embodiments, based on the foregoing scheme, the first control unit 102 includes:

[0068] A first signal comparator is connected to the first pressure acquisition subunit and the second pressure acquisition subunit. It is used to receive a first pressure signal and a second pressure signal, compare the received first pressure signal and the second pressure signal, and output the signal with the larger value as the first comparison signal.

[0069] A first pressure controller, connected to the first signal comparator, is used to receive the first comparison signal, generate a first control signal based on the first comparison signal and a set pressure, and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline.

[0070] In some feasible embodiments, based on the foregoing scheme, the second control unit 103 includes:

[0071] The second signal comparator is connected to the second pressure acquisition subunit and the third pressure acquisition subunit. It is used to receive the second pressure signal and the third pressure signal, compare the received second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal.

[0072] The second pressure controller, connected to the second signal comparator, is used to receive the second comparison signal and generate a third control signal based on the second comparison signal and the set pressure, which is then output to the third oxygen pipeline.

[0073] Understandably, after receiving the first control signal, the first oxygen pipeline adjusts its internal pressure accordingly. Similarly, after receiving the second control signal, the second oxygen pipeline adjusts its internal pressure accordingly, and so on. The third oxygen pipeline, after receiving the third control signal, adjusts its internal pressure accordingly. The pressure adjustment can be achieved by controlling the opening and closing of valves on the pipelines.

[0074] In some feasible embodiments, based on the foregoing scheme, the first pressure controller and the second pressure controller are selected as electronic pressure controllers.

[0075] It should be noted that pressure controllers are divided into two categories: electronic pressure controllers and mechanical pressure controllers. In this embodiment, an electronic pressure controller is used to ensure accurate control of the pressure inside the oxygen pipeline.

[0076] Electronic pressure controllers: Used in industrial control systems with high control requirements. This type of pressure controller is based on a digital pressure gauge and uses relay output signals for upper and lower limit control. The control point can be freely set, with low hysteresis, vibration resistance, fast response, and stable reliability. Hysteresis settings effectively protect against repeated actions caused by pressure fluctuations, safeguarding control equipment. It is a high-precision device for detecting pressure and level signals, achieving pressure and level monitoring and control.

[0077] Mechanical pressure controller: commonly known as a pressure switch, it is a microswitch activated by purely mechanical deformation. Working principle: When the system pressure exceeds a certain set pressure, the free ends of different pressure-sensitive elements (Bourdon tube, diaphragm, capsule, bellows, piston, etc.) are displaced, causing a momentary movement of the disc inside the switch via a connecting rod. When the pressure drops to the rated recovery value, the disc moves instantaneously in the opposite direction, the switch automatically resets, and finally outputs a switching electrical signal.

[0078] Figure 4 This illustration shows a connection diagram of a control system for an oxygen pressure regulating station according to an embodiment of this application, when controlling the oxygen pressure regulating station.

[0079] like Figure 4As shown, pressure transmitters P11 and P21 are connected to a first signal comparator, transmitting the first and second pressure signals from the first and second oxygen pipelines to the first signal comparator. The first comparator compares the first and second pressure signals, and outputs the signal with the larger value as the first comparison signal to the first pressure controller. The first pressure controller generates a first control signal and a second control signal based on the first comparison signal and the first set pressure. The first pressure controller is connected to the first pressure regulating valve PV111 and the second pressure regulating valve PV211, respectively, and outputs the first and second control signals to the first pressure regulating valve PV111 and the second pressure regulating valve PV211, respectively, controlling the opening and closing of the first pressure regulating valve PV111 and the second pressure regulating valve PV211. This allows the first comparison signal to track the first set pressure and automatically adjust the two pressure regulating valves, ensuring stable pressure in the downstream user's oxygen pipeline.

[0080] Pressure transmitters P21 and P31 are connected to a second signal comparator, transmitting the second and third pressure signals acquired from the second and third oxygen pipelines to the second signal comparator. The second comparator compares the second and third pressure signals, outputting the signal with the larger value as the second comparison signal to the second pressure controller. The second pressure controller generates a third control signal based on the second comparison signal and the second set pressure. The third control signal is connected to the third pressure regulating valve PV311, controlling the opening and closing of the third pressure regulating valve PV311. This allows the second comparison signal to track the second set pressure and automatically adjust the pressure regulating valve of the third oxygen pipeline, ensuring stable oxygen pipeline pressure for downstream users.

[0081] In this embodiment, the oxygen pressure regulating station is controlled by two control units. If one control unit fails—for example, if the first control unit 102 fails and its controlled pressure regulating valves PV111 and PV211 close and lose their regulating ability—the second control unit 103 continues to operate normally, and its controlled pressure regulating valve PV311 can continue to regulate normally. Conversely, if the second control unit 103 fails and its controlled pressure regulating valve PV3111 closes and loses its regulating ability, the first control unit 102 continues to operate normally, and its controlled pressure regulating valves PV111 and PV211 can continue to regulate normally. This improves the operational safety and stability of the oxygen pressure regulating station and ensures the stability of the oxygen pipeline pressure for downstream users.

[0082] On the other hand, this application also provides a control method for an oxygen pressure regulating station, such as... Figure 5 As shown, it specifically includes steps S100 to S500.

[0083] Step S100: Collect the pressure information of the first oxygen pipeline, the second oxygen pipeline, and the third oxygen pipeline, and use them as the first pressure signal, the second pressure signal, and the third pressure signal, respectively.

[0084] Step S200: Compare the first pressure signal and the second pressure signal, and output the signal with the larger value as the first comparison signal.

[0085] Step S300: Compare the second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal.

[0086] Step S400: Control the first oxygen pipeline and the second oxygen pipeline based on the first comparison signal and the first set pressure.

[0087] Step S500: Control the third oxygen pipeline based on the second comparison signal and the second set pressure.

[0088] In some feasible embodiments, step S400 specifically includes:

[0089] When the first pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the first oxygen pipeline is controlled to close.

[0090] When the first pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the first oxygen pipeline is controlled to open.

[0091] When the second pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the second oxygen pipeline is controlled to close.

[0092] When the second pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the second oxygen pipeline is controlled to open.

[0093] It is understood that in this embodiment, when the first pressure signal is greater than the second pressure signal, the first pressure signal is output as the first comparison signal, and when the second pressure signal is greater than the first pressure signal, the second pressure signal is output as the first comparison signal.

[0094] In this embodiment, the first set pressure is used to determine whether the pressure of the first and second oxygen pipelines meets the standard. Only when the first comparison signal is equal to the first set pressure is it not necessary to adjust the pressure regulating valves on the first and second oxygen pipelines.

[0095] In some feasible embodiments, step S500 specifically includes:

[0096] When the second comparison signal is greater than the second set pressure, the third oxygen pipeline is shut off.

[0097] When the second comparison signal is less than the second set pressure, the third oxygen pipeline is opened.

[0098] It is understood that in this embodiment, when the second pressure signal is greater than the third pressure signal, the second pressure signal is output as the second comparison signal, and when the third pressure signal is greater than the second pressure signal, the third pressure signal is output as the second comparison signal.

[0099] It should be noted that in this embodiment, the second set pressure is less than the first set pressure. The second set pressure is used to determine whether the pressure of the third oxygen pipeline meets the standard. Only when the second comparison signal is equal to the second set pressure is it not necessary to adjust the pressure regulating valve on the third oxygen pipeline.

[0100] It is understandable that comparing the two pressure signals and then comparing them with the set pressure can prevent the controller from issuing incorrect control commands and ensure the safety of the oxygen pressure regulating station when a problem occurs in one of the oxygen pipelines and the collected pressure information does not meet the judgment criteria after comparison with the set pressure.

[0101] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0102] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0103] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0104] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A control system for an oxygen pressure regulating station, the oxygen pressure regulating station comprising a first oxygen pipeline, a second oxygen pipeline, and a third oxygen pipeline, wherein the first oxygen pipeline, the second oxygen pipeline, and the third oxygen pipeline are connected in parallel, characterized in that, The control system includes: The pressure acquisition unit is used to acquire the first pressure signal of the first oxygen pipeline, the second pressure signal of the second oxygen pipeline, and the third pressure signal of the third oxygen pipeline. The first control unit is connected to the pressure acquisition unit and is used to receive the first pressure signal and the second pressure signal, generate a first control signal and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline. The second control unit is connected to the pressure acquisition unit and is used to receive the second pressure signal and the third pressure signal, and generate a third control signal to output to the third oxygen pipeline. The pressure acquisition unit includes: The first pressure acquisition subunit is installed on the first oxygen pipeline and is used to acquire the first pressure signal of the first oxygen pipeline. The second pressure acquisition subunit is installed on the second oxygen pipeline and is used to acquire the second pressure signal of the second oxygen pipeline. The third pressure acquisition subunit is installed on the third oxygen pipeline and is used to acquire the third pressure signal of the third oxygen pipeline. The first control unit includes: A first signal comparator is connected to the first pressure acquisition subunit and the second pressure acquisition subunit. It is used to receive a first pressure signal and a second pressure signal, compare the received first pressure signal and the second pressure signal, and output the signal with the larger value as the first comparison signal. A first pressure controller, connected to the first signal comparator, is used to receive the first comparison signal, generate a first control signal based on the first comparison signal and a first set pressure and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline. The second control unit includes: The second signal comparator is connected to the second pressure acquisition subunit and the third pressure acquisition subunit. It is used to receive the second pressure signal and the third pressure signal, compare the received second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal. The second pressure controller, connected to the second signal comparator, is used to receive the second comparison signal and generate a third control signal based on the second comparison signal and the second set pressure, which is then output to the third oxygen pipeline.

2. The system according to claim 1, characterized in that, The first pressure acquisition subunit, the second pressure acquisition subunit, and the third pressure acquisition subunit all use pressure transmitters.

3. The system according to claim 2, characterized in that, The pressure transmitter can be any one of a piezoresistive transmitter, a piezoelectric transmitter, or a capacitive transmitter.

4. The system according to claim 1, characterized in that, The first pressure controller and the second pressure controller are both electronic pressure controllers.

5. A control method for an oxygen pressure regulating station, applied to the control system of the oxygen pressure regulating station according to any one of claims 1-4, wherein the oxygen pressure regulating station includes a first oxygen pipeline, a second oxygen pipeline, and a third oxygen pipeline, characterized in that, The method includes: The pressure information of the first oxygen pipeline, the second oxygen pipeline, and the third oxygen pipeline is collected and used as the first pressure signal, the second pressure signal, and the third pressure signal, respectively. The first pressure signal and the second pressure signal are compared, and the signal with the larger value between the two is output as the first comparison signal. And compare the second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal; Based on the first comparison signal and the first set pressure, control the first oxygen pipeline and the second oxygen pipeline; The third oxygen pipeline is controlled based on the second comparison signal and the second set pressure. The method of controlling the first oxygen pipeline and the second oxygen pipeline based on the first comparison signal and the first set pressure includes: The received first pressure signal and second pressure signal are compared, and the signal with the larger value is output as the first comparison signal. Receive the first comparison signal, and generate a first control signal based on the first comparison signal and the first set pressure and output it to the first oxygen pipeline, and generate a second control signal and output it to the second oxygen pipeline; The third oxygen pipeline, controlled based on the second comparison signal and the second set pressure, includes: Receive a second pressure signal and a third pressure signal, compare the received second pressure signal and the third pressure signal, and output the signal with the larger value as the second comparison signal; The system receives the second comparison signal and generates a third control signal based on the second comparison signal and the second set pressure, which is then output to the third oxygen pipeline.

6. The method according to claim 5, characterized in that, The method of controlling the first oxygen pipeline and the second oxygen pipeline based on the first comparison signal and the first set pressure includes: When the first pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the first oxygen pipeline is controlled to close. When the first pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the first oxygen pipeline is controlled to open. When the second pressure signal is used as the first comparison signal, and the first comparison signal is greater than the first set pressure, the second oxygen pipeline is controlled to close. When the second pressure signal is used as the first comparison signal, and the first comparison signal is less than the first set pressure, the second oxygen pipeline is controlled to open.

7. The method according to claim 5, characterized in that, The third oxygen pipeline, controlled based on the second comparison signal and the second set pressure, includes: When the second comparison signal is greater than the second set pressure, the third oxygen pipeline is shut off. When the second comparison signal is less than the second set pressure, the third oxygen pipeline is opened.

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