Pressure regulating system

Abstract

The utility model discloses a pressure regulating system. The system comprises a pressure sensor, a pneumatic control type pressure reducing valve arranged on a first pipeline, and an electric proportional type pressure reducing valve arranged on a second pipeline connected with the first pipeline in parallel, the pressure sensor monitors gas pressure at an outlet of the pneumatic control type pressure reducing valve and sends outlet pressure data to the electric proportional type pressure reducing valve; the electric proportional pressure reducing valve provides pilot gas for the pneumatic control pressure reducing valve and adjusts the pressure of the pilot gas according to the outlet pressure data and the target pressure of the gas path; the pneumatic control type pressure reducing valve is used for decompressing input gas based on pilot gas provided by the electric proportional pressure reducing valve and then outputting the input gas; the pneumatic control type pressure reducing valve of the first pipeline and the electric proportional type pressure reducing valve of the second pipeline are disconnected or communicated through the pilot cavity. A gas circuit and a circuit can be separated in a physical space, and the system safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic control, in particular to a pressure regulating system. Background Art

[0002] In pneumatic control systems, pressure reducing valves are often required to adjust the required outlet pressure. With the vigorous development of industrial automation, electrical proportional pressure reducing valves that can achieve automatic control and remote control are widely used. If electrical pressure reducing valves are used in pneumatic control systems that require high pressure or require the use of special gases such as flammable and explosive gases, although automatic remote control can be achieved, safety hazards may arise due to problems such as high-frequency solenoid valves and circuit board corrosion in the electrical proportional pressure reducing valves. In severe cases, flammable and explosive gases may explode, and the safety of the construction environment cannot be guaranteed. If a pneumatically controlled pressure reducing valve is used in a pneumatic control system to adjust the required outlet pressure, although it is safer than using an electrical proportional pressure reducing valve, the use of a pneumatically controlled pressure reducing valve cannot achieve remote and automatic control of the pneumatic control system, requires manual intervention, cannot guarantee work efficiency, and is inconvenient to operate. Utility Model Content

[0003] In view of the above problems, the present utility model is proposed to provide a pressure regulating system that overcomes the above problems or at least partially solves the above problems.

[0004] The embodiment of the utility model provides a pressure regulating system, comprising: a pressure sensor, a gas-controlled pressure reducing valve arranged on a first pipeline, and an electric proportional pressure reducing valve arranged on a second pipeline connected in parallel with the first pipeline;

[0005] The pressure sensor is used to monitor the gas pressure at the outlet of the gas-controlled pressure reducing valve and send the outlet pressure data to the electrical proportional pressure reducing valve;

[0006] The electric proportional pressure reducing valve is used to provide pilot gas for the gas-operated pressure reducing valve and adjust the pressure of the pilot gas according to the outlet pressure data and the target pressure of the gas line;

[0007] The gas-controlled pressure reducing valve is used to reduce the input gas and then output it based on the pilot gas provided by the electrical proportional pressure reducing valve;

[0008] The air-controlled pressure reducing valve of the first pipeline and the electrical proportional pressure reducing valve of the second pipeline are disconnected or connected via the pilot chamber.

[0009] In some optional embodiments, the pressure regulating system further includes: at least one first pressure reducing valve;

[0010] The first pressure reducing valve is arranged at the branch connection position between the first pipeline and the second pipeline or on the first pipeline before the branch connection position, and is used for outputting the gas input from the external gas source to the first pipeline and the second pipeline after performing a first proportional pressure attenuation.

[0011] In some optional embodiments, the pressure regulating system further comprises: at least one second pressure reducing valve;

[0012] The second pressure reducing valve is arranged on the second pipeline and is located before the electrical proportional pressure reducing valve, and is used for performing a second proportional pressure attenuation on the gas input into the second pipeline and then outputting the gas to the electrical proportional pressure reducing valve.

[0013] In some optional embodiments, the pressure regulating system further includes: a flow controller;

[0014] The flow controller is arranged on the first pipeline and located after the gas-controlled pressure reducing valve, and is used to adjust the outlet flow of the gas-controlled pressure reducing valve based on the electrical signal sent by the electrical proportional pressure reducing valve, and the electrical signal is generated according to the target flow data of the gas circuit.

[0015] In some optional embodiments, when the above-mentioned pressure regulation system is in use, the pneumatically controlled pressure reducing valve is located in an environment where the pressure is higher than a first pressure threshold, the electrical proportional pressure reducing valve is located in an environment where the pressure is lower than a second pressure threshold, and the first pressure threshold is greater than the second pressure threshold.

[0016] In some optional embodiments, the electrical proportional pressure reducing valve of the pressure regulating system comprises: an air circuit outlet, an air circuit inlet, a first transceiver unit, an execution unit and a control interface;

[0017] The gas circuit inlet is connected to the second pipeline, and the gas circuit outlet is connected to the pilot chamber;

[0018] The first transceiver unit is connected to the pressure sensor and the flow controller to receive pressure data collected by the pressure sensor and send an electrical signal to the flow controller;

[0019] The execution unit is used to determine the pressure adjustment amount of the pilot gas based on the outlet pressure data obtained by the transceiver unit and the target pressure of the gas circuit obtained by the control interface, and adjust the pressure of the pilot gas output from the gas circuit outlet based on the pressure adjustment amount;

[0020] The control interface is externally connected to a system controller to obtain control data, and the control data includes a target pressure and a target flow rate of the gas circuit.

[0021] In some optional embodiments, the execution unit of the pressure regulation system is specifically used to:

[0022] If the determined pressure adjustment amount is a positive value, the pressure of the pilot gas output from the gas path outlet is increased;

[0023] If the determined pressure adjustment amount is a negative value, the pressure of the pilot gas output from the gas line outlet is reduced.

[0024] In some optional embodiments, in the pressure regulating system, the flow controller includes a second transceiver unit and a flow control unit:

[0025] A second transceiver unit, used for receiving an electrical signal sent by the electrical proportional pressure reducing valve;

[0026] The flow control unit is used to determine the flow adjustment amount based on the electrical signal and adjust the outlet flow of the air-controlled pressure reducing valve according to the flow adjustment amount.

[0027] In some optional embodiments, the flow control unit of the pressure regulating system is specifically used for:

[0028] Acquiring a target flow rate of the gas circuit based on the electrical signal received by the second transceiver unit, and determining an adjustment amount of the flow rate according to the target flow rate and the current outlet flow rate of the gas-controlled pressure reducing valve;

[0029] Based on the flow adjustment amount, the outlet flow of the air-controlled pressure-reducing valve is adjusted on the basis of the current outlet flow of the air-controlled pressure-reducing valve.

[0030] In some optional embodiments, in the pressure regulating system, the input end of the pressure sensor is connected to the air-controlled pressure reducing valve to obtain the outlet pressure data of the air-controlled pressure reducing valve, and the pressure sensor is electrically connected to the electrical proportional pressure reducing valve to send the outlet pressure data to the electrical proportional pressure reducing valve;

[0031] The input end of the electrical proportional pressure reducing valve is connected to an external gas source; the output end of the electrical proportional pressure reducing valve is connected to the second input end of the gas-controlled pressure reducing valve;

[0032] The first input end of the air-controlled pressure reducing valve is connected to the first pipeline;

[0033] An input end of the first pressure reducing valve is connected to an external gas source, and an output end of the first pressure reducing valve is connected to a first pipeline and a second pipeline;

[0034] The input end of the second pressure reducing valve is connected to the output end of the first pressure reducing valve, and the output end is connected to the input end of the electrical proportional pressure reducing valve;

[0035] The input end of the flow controller is connected to the output end of the air-controlled pressure reducing valve, and the output end of the flow controller is connected to the subsequent gas circuit; the flow controller is electrically connected to the electrical proportional pressure reducing valve to obtain the electrical signal sent by the electrical proportional pressure reducing valve.

[0036] In some optional embodiments, the pressure regulating system further includes: a system controller;

[0037] The system controller is used to provide control data to the pressure regulation system; control the electric proportional pressure reducing valve to adjust the pressure of the pilot gas and control the flow controller to adjust the outlet flow of the air-controlled pressure reducing valve; control the pressure sensor to send outlet pressure data to the electric proportional pressure reducing valve; control the electric proportional pressure reducing valve to send electrical signals to the flow controller.

[0038] The beneficial effects of the above technical solution provided by the embodiment of the utility model at least include:

[0039] The pressure regulating system provided by the embodiment of the utility model provides pilot gas to the air-controlled pressure reducing valve through an electrical proportional pressure reducing valve to adjust the pressure at the output port of the air-controlled pressure reducing valve. The electrical proportional pressure reducing valve determines the adjustment amount of the pilot gas pressure according to the relationship between the outlet pressure data provided by the pressure sensor and the target pressure, and adjusts the outlet pressure of the air-controlled pressure reducing valve based on the pressure adjustment amount of the pilot gas. The above system can set the electrical proportional pressure reducing valve in a place far away from special occasions, and set the air-controlled pressure reducing valve in special occasions. The electrical proportional pressure reducing valve controls the operation of the air-controlled pressure reducing valve, which can avoid It can avoid the electronic devices in the electrical proportional pressure reducing valve from being corroded and damaged, and can realize automatic control of the pressure reducing valve in special environment; compared with the use of gas-controlled pressure reducing valve alone, this system can realize remote control of the pressure regulating system by using the electrical proportional pressure reducing valve, with high control accuracy and improved working efficiency of pneumatic control; compared with the use of gas-electric proportional pressure reducing valve alone, this system has higher safety and strong operability. In occasions where pressure control of special gases such as flammable and explosive gases is required, this system can separate the gas circuit and the circuit in physical space, which is safer and more reliable than using a single electrical proportional pressure reducing valve.

[0040] Other features and advantages of the utility model will be described in the subsequent description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0041] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 This is a schematic diagram of the structure of the pressure regulating system in the embodiment of the utility model;

[0044] Figure 2This is a structural schematic diagram of an electric proportional pressure reducing valve in an embodiment of the utility model;

[0045] Figure 3 This is a schematic diagram of the structure of the controller in the embodiment of the utility model;

[0046] Figure 4 It is a schematic diagram of the specific structure of the pressure regulating system in the embodiment of the utility model. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] In pneumatic control systems, pressure reducing valves are often needed to adjust the outlet pressure of the gas circuit. In pneumatic control systems for high-pressure or flammable and explosive gases, if an electrical proportional pressure reducing valve is used to adjust the outlet pressure of the gas circuit, it will cause unsafe accidents. If a pneumatic proportional valve is used to adjust the outlet pressure, it will not improve work efficiency and cannot achieve remote control.

[0049] In order to solve the problems of unsafe operating environment, low working efficiency and inability to remotely control in the prior art, an embodiment of the utility model provides a pressure regulating system to achieve safe and efficient control of the outlet pressure in a pneumatic control system.

[0050] The present invention provides a pressure control system, the system structure of which is as follows: Figure 1 As shown, it includes: a pressure sensor, a gas-controlled pressure reducing valve arranged on a first pipeline, and an electric proportional pressure reducing valve arranged on a second pipeline connected in parallel with the first pipeline;

[0051] The pressure sensor is used to monitor the gas pressure at the outlet of the gas-controlled pressure reducing valve and send the outlet pressure data to the electrical proportional pressure reducing valve;

[0052] The electric proportional pressure reducing valve is used to provide pilot gas for the gas-operated pressure reducing valve and adjust the pressure of the pilot gas according to the outlet pressure data and the target pressure of the gas line;

[0053] The gas-controlled pressure reducing valve is used to reduce the input gas and then output it based on the pilot gas provided by the electrical proportional pressure reducing valve;

[0054] The air-controlled pressure reducing valve of the first pipeline and the electrical proportional pressure reducing valve of the second pipeline are disconnected or connected via the pilot chamber.

[0055] The pilot chamber connects the air-controlled pressure reducing valve and the electric proportional pressure reducing valve, and is used to provide pilot gas for the air-controlled pressure reducing valve. The pilot chamber can be a section of connected pipe or other conduit through which gas can pass.

[0056] The second pipeline in the above pressure control system is set at a position far away from the first pipeline. The way of setting far away can be that the two pipelines are installed in the same operating space, but a safety distance is set between each other, for example, the safety distance can be 15m or 20m, or they can be set in different operating spaces. The operating space has an isolation effect to achieve the purpose of isolating the electrical proportional pressure reducing valve and the gas-controlled pressure reducing valve in physical space. This is because the electrical proportional pressure reducing valve is provided with a high-frequency solenoid valve and a circuit board. If the high-frequency solenoid valve or the circuit board is overloaded and causes wear or corrosion, causing fire, the gas in the second pipeline is easily ignited or exploded. When this happens, if the two pipelines are close, the valve of the gas-controlled pressure reducing valve cannot be closed in time, resulting in the impact of the subsequent gas circuit. The gas-controlled pressure reducing valve and the electrical proportional pressure reducing valve can be connected through a pilot cavity. If there is a safety hazard in the electrical proportional pressure reducing valve, the pilot cavity can be closed in time to disconnect the gas-controlled pressure reducing valve and the electrical proportional pressure reducing valve to prevent safety hazards. At this time, human intervention is required to adjust the outlet pressure of the gas-controlled pressure reducing valve to ensure normal operation.

[0057] See also Figure 1 As shown, the gas source of the above system is divided into two routes, one route reaches the gas-controlled pressure reducing valve through the first pipeline, and the other route reaches the electric proportional pressure reducing valve through the second pipeline. The electric proportional pressure reducing valve provides pilot gas to the gas-controlled pressure reducing valve through the pilot chamber to adjust the outlet pressure of the gas-controlled pressure reducing valve. However, the pilot chamber is not connected to the rear-stage gas circuit of the gas-controlled pressure reducing valve, which can ensure that there is no backflow between the gas in the rear-stage gas circuit and the pilot gas, and can also ensure that the gas in the rear-stage gas circuit is isolated from the electric proportional pressure reducing valve, thereby increasing safety. Finally, the gas-controlled pressure reducing valve outputs gas that meets the gas pressure requirements for use in the rear-stage gas circuit. The pressure sensor arranged on the first pipeline can monitor the outlet pressure data of the gas-controlled pressure reducing valve. Figure 1 The dotted line in the figure indicates that the pressure sensor is electrically connected to the electric proportional pressure reducing valve. The pressure sensor can convert the monitored outlet pressure data into an electrical signal and feed it back to the electric proportional pressure reducing valve.

[0058] The pressure regulating system of the utility model combines an electric proportional pressure reducing valve and an air-controlled pressure reducing valve for use. The electric proportional pressure reducing valve controls the operation of the air-controlled pressure reducing valve. The electric proportional pressure reducing valve can adjust the outlet pressure of the air-controlled pressure reducing valve based on the outlet pressure monitored by the pressure sensor. Compared with the air-controlled pressure reducing valve used alone, the system can realize remote automatic control by using the electric proportional pressure reducing valve. Compared with the electric proportional pressure reducing valve used alone, the system is safer. The electric proportional pressure reducing valve of the system can be adapted to air-controlled pressure reducing valves with various pressure ranges, realize various pressure range adjustments, and improve the control accuracy of the outlet pressure.

[0059] Optionally, an optional structure of the above pressure regulating system can be found in Figure 3 As shown, it also includes: at least one first pressure reducing valve;

[0060] The first pressure reducing valve is arranged at the junction of the first pipeline and the second pipeline or on the first pipeline before the junction, and is used to output the gas input from the external gas source to the first pipeline and the second pipeline after performing a first proportional pressure attenuation. One or more first pressure reducing valves can be arranged as needed, and the first pressure reducing valve is not arranged after the first pipeline and the second pipeline are branched, so that the first pipeline and the second pipeline can be provided with reduced-pressure gas at the same time.

[0061] Optionally, the pressure regulating system further comprises: at least one second pressure reducing valve;

[0062] The second pressure reducing valve is arranged on the second pipeline and is located before the electric proportional pressure reducing valve, and is used to perform a second proportional pressure attenuation on the gas input into the second pipeline and then output it to the electric proportional pressure reducing valve. The gas entering the electric proportional pressure reducing valve is further depressurized by the second pressure reducing valve, and the number of the second pressure reducing valves is determined according to the inlet pressure requirement of the electric proportional pressure reducing valve, the pressure reducing parameters of each second pressure reducing valve, and the gas pressure after the first pressure reducing valve is depressurized.

[0063] Optionally, the above-mentioned pressure regulating system further includes: a flow controller;

[0064] A flow controller is arranged on the first pipeline and located after the air-controlled pressure reducing valve, and is used to adjust the outlet flow of the air-controlled pressure reducing valve based on the electrical signal sent by the electrical proportional pressure reducing valve. The electrical signal of the electrical proportional pressure reducing valve can be generated according to the target flow data of the air circuit obtained.

[0065] The purpose of setting the first pressure reducing valve is that the gas pressure input by the gas source is usually relatively high. Setting the first pressure reducing valve at the input end of the gas circuit can buffer the input gas pressure to prevent the input gas pressure from being too high and damaging the gas-controlled pressure reducing valve and / or the electric proportional pressure reducing valve. The second pressure reducing valve is set because the pressure of the pilot gas provided by the electric proportional pressure reducing valve to the gas-controlled pressure reducing valve is lower than the gas pressure of the gas source input to the gas-controlled pressure reducing valve. Therefore, the gas pressure output by the first pressure reducing valve can pass through the second pressure reducing valve to make the gas pressure of the pilot gas at the electric proportional pressure reducing valve lower than the gas pressure input to the gas-controlled pressure reducing valve by the first pressure reducing valve.

[0066] When the system adjusts the pressure, the outlet flow of the gas-controlled pressure reducing valve can also be adjusted according to the target flow of the gas circuit to ensure a constant output of the gas flow. The outlet flow can be adjusted by setting a flow controller.

[0067] Optionally, in the above pressure regulating system, the electrical proportional pressure reducing valve comprises: an air circuit outlet, an air circuit inlet, a first transceiver unit, an execution unit and a control interface;

[0068] The gas circuit inlet is connected to the second pipeline, and the gas circuit outlet is connected to the pilot chamber connected to the electrical proportional pressure reducing valve and the gas controlled pressure reducing valve;

[0069] The first transceiver unit is connected to the pressure sensor and the flow controller to receive the pressure data collected by the pressure sensor and send an electrical signal to the flow controller; the first transceiver unit can be a serial interface, a radio frequency antenna or a programmable chip with transceiver functions, or it can be other components or devices that can realize communication.

[0070] The execution unit is used to determine the pressure adjustment amount of the pilot gas based on the outlet pressure data obtained by the transceiver unit and the target pressure of the gas circuit obtained by the control interface, and adjust the pressure of the pilot gas output from the gas circuit outlet based on the pressure adjustment amount of the pilot gas; the execution unit includes a high-frequency solenoid valve and its drive circuit.

[0071] The control interface is connected to an external system controller to obtain control data, including a target pressure of the gas circuit and a target flow rate of the gas circuit. The external system controller may include a human-computer interaction unit to allow a user to input control data, such as a target pressure, a target flow rate, etc.

[0072] See the schematic diagram of the structure of the electric proportional pressure reducing valve. Figure 2As shown, the input gas is input to the electric proportional pressure reducing valve through the gas circuit inlet, and the gas circuit outlet outputs the reduced pressure. The control interface can be connected to the system controller to obtain the target pressure and target flow of the gas circuit. The transceiver unit receives the pressure data collected by the pressure sensor and sends an electrical signal to the flow controller; the execution unit can adjust the pressure of the pilot gas. The electrical signal of the electric proportional pressure reducing valve can be generated according to the target flow of the gas circuit. When the target flow of the gas circuit changes, different electrical signals will be generated. At this time, the outlet flow of the gas-controlled pressure reducing valve needs to be adjusted. The target flow of the gas circuit can be set by the user according to the needs. Different working scenarios require different target flows.

[0073] Optionally, the execution unit of the above-mentioned pressure regulation system can reduce or increase the pressure of the pilot gas according to the pressure adjustment amount of the pilot gas. Specifically, if the pressure adjustment amount of the pilot gas is determined to be a positive value, the pressure of the pilot gas output from the gas circuit outlet is increased; if the pressure adjustment amount of the pilot gas is determined to be a negative value, the pressure of the pilot gas output from the gas circuit outlet is reduced.

[0074] When the pressure control system is working, the outlet pressure of the gas-controlled pressure reducing valve is monitored by the pressure sensor. The pressure sensor feeds back the monitored outlet pressure data to the transceiver unit of the electrical proportional pressure reducing valve in real time. The executive unit of the electrical proportional pressure reducing valve compares the outlet pressure data with the target pressure of the gas circuit. If the outlet pressure data is less than the target pressure, the pressure of the pilot gas needs to be increased to increase the outlet pressure, and the pressure adjustment amount is determined to be a positive value, so that the outlet pressure is close to the target pressure to achieve a constant pressure output; conversely, if the outlet pressure data is greater than the target pressure, the pressure of the pilot gas needs to be reduced to reduce the outlet pressure, and the pressure adjustment amount is determined to be a negative value, so that the outlet pressure is close to the target pressure. The purpose of adjusting the outlet pressure can be achieved by adjusting the pilot gas, so that the outlet pressure is output constantly with the target pressure.

[0075] Optionally, in the above pressure regulating system, the flow controller includes a second transceiver unit and a flow control unit:

[0076] The second transceiver unit is used to receive the electrical signal sent by the electrical proportional pressure reducing valve; the second transceiver unit can be a serial interface, a radio frequency antenna or a programmable chip with transceiver functions, or other components or devices capable of realizing communication.

[0077] A flow control unit is used to determine a flow adjustment amount based on the pressure adjustment amount, and adjust the outlet flow of the air-controlled pressure reducing valve according to the flow adjustment amount; the flow control unit can be implemented using a control chip.

[0078] Optionally, the flow control unit of the pressure regulating system is specifically used for:

[0079] Acquiring a target flow rate of the gas circuit based on the electrical signal received by the second transceiver unit, and determining an adjustment amount of the flow rate according to the target flow rate and the current outlet flow rate of the gas-controlled pressure reducing valve;

[0080] Based on the flow adjustment amount, the outlet flow of the air-controlled pressure-reducing valve is adjusted on the basis of the current outlet flow of the air-controlled pressure-reducing valve.

[0081] When it is necessary to control the output flow, the pressure regulating system can also use the flow controller to adjust the outlet flow. The flow controller can adjust the flow output through the electrical signal sent by the electrical proportional pressure reducing valve. For example, the electrical signal is 4 to 20 mA, corresponding to 0 to 100% of the output flow. The flow control unit obtains the target flow of the gas circuit according to the electrical signal output by the electrical proportional pressure reducing valve. Based on the target flow of the gas circuit and the current outlet flow of the gas-controlled pressure reducing valve, the outlet flow adjustment amount of the gas circuit can be determined. On the basis of the current outlet flow, the size of the outlet flow is adjusted based on the flow adjustment amount to control the output of the flow.

[0082] Optionally, the pressure regulating system further includes: a system controller;

[0083] The system controller is used to provide control data to the pressure regulation system; control the electric proportional pressure reducing valve to adjust the pressure of the pilot gas and control the flow controller to adjust the outlet flow of the gas-controlled pressure reducing valve; control the pressure sensor to send outlet pressure data to the electric proportional pressure reducing valve; control the electric proportional pressure reducing valve to send an electrical signal to the flow controller. The control data may include the target pressure and target flow of the gas circuit.

[0084] See the control diagram of the system controller for details. Figure 3 As shown, the system controller can be arranged in the control system, and can also be arranged in the above-mentioned pressure regulating system to realize the remote control of the electric proportional pressure reducing valve, which can improve the efficiency of the pneumatic control work.

[0085] A specific structure of the above pressure regulating system is shown in Figure 4 As shown, Figure 4 The air source on the left side can be the compressed air output by the air compressor after cooling, drying and cleaning, or other gases can be selected according to actual work needs. This air source can be used as the air source of air control products. The air source is first decompressed. Figure 4 The pressure reducing valve 1 in the embodiment of the present invention performs a first proportional attenuation on the gas pressure and then divides the gas pressure into two paths, which flow into the first pipeline and the second pipeline respectively. When the gas flows into the first pipeline, it passes through the gas-controlled pressure reducing valve, and when the gas flows into the second pipeline, it passes through the second pressure reducing valve. Figure 4The pressure reducing valve 2 in the pressure reducing valve performs a second proportional attenuation on the pressure of the inflowing gas and then outputs it to the electrical proportional pressure reducing valve. The electrical proportional pressure reducing valve provides pilot gas to the air-controlled pressure reducing valve. The pressure of the pilot gas is lower than the pressure input to the air supply port of the air-controlled pressure reducing valve. Therefore, the first pressure reducing valve and the second pressure reducing valve are set to control the input gas pressure. Figure 4 The gas pressure at the middle pressure reducing valve 2 is lower than the pressure at the gas supply port of the gas-operated pressure reducing valve. Figure 4 The high and low pressures in the figure are relative to the pressure of the gas-controlled pressure reducing valve. Therefore, the pressure of the second pipeline input to the electrical proportional pressure reducing valve is Figure 4 The pressure of the first pipeline input gas-controlled pressure reducing valve is Figure 4 High pressure in.

[0086] The electric proportional pressure reducing valve provides pilot air to the air-controlled pressure reducing valve through the pilot chamber. The electric proportional pressure reducing valve can be electrically connected to the pressure sensor and flow controller. Figure 4 The air flow controller in the air circuit can obtain the target pressure and target flow of the air circuit from the factory DSC system through the system controller. The factory DSC system and the system controller are electrically connected. The control interface of the electric proportional reducing valve can obtain the target pressure value, target flow of the system controller and the outlet pressure data of the air-controlled pressure reducing valve monitored by the pressure sensor, and compare the outlet pressure data with the target pressure value. If the outlet pressure data is greater than the target pressure, the pressure adjustment amount of the pilot gas is determined, and the pressure of the pilot gas is reduced according to the pressure adjustment amount to maintain the outlet pressure of the air-controlled pressure reducing valve output with the target pressure; if the outlet pressure data is less than the target pressure, the pressure adjustment amount of the pilot gas is determined, and the pressure of the pilot gas is increased according to the pressure adjustment amount to maintain the outlet pressure of the air-controlled pressure reducing valve output with the target pressure.

[0087] When flow control is required, the electrical proportional pressure reducing valve generates a corresponding electrical signal according to the target flow and sends it to the electrical proportional pressure reducing valve. The air flow controller in the above system obtains the electrical signal output by the electrical proportional pressure reducing valve and controls the output of the flow in proportion.

[0088] Optionally, the specific connection relationship in the above pressure control system includes:

[0089] The input end of the pressure sensor is connected to the air-controlled pressure reducing valve to obtain the outlet pressure data of the air-controlled pressure reducing valve, and the pressure sensor is electrically connected to the electrical proportional pressure reducing valve to send the outlet pressure data to the electrical proportional pressure reducing valve.

[0090] The input end of the electric proportional pressure reducing valve is connected to an external gas source; the output end of the electric proportional pressure reducing valve is connected to the second input end of the gas-controlled pressure reducing valve.

[0091] The first input end of the air-controlled pressure reducing valve is connected to the first pipeline. The gas input from the gas source flows into the first input end of the air-controlled pressure reducing valve through the first pipeline, and the pilot gas output from the electric proportional pressure reducing valve flows into the second input end of the air-controlled pressure reducing valve through the pilot chamber.

[0092] The input end of the first pressure reducing valve is connected to an external gas source, and the output end of the first pressure reducing valve is connected to the first pipeline and the second pipeline.

[0093] The input end of the second pressure reducing valve is connected to the output end of the first pressure reducing valve, and the output end is connected to the input end of the electric proportional pressure reducing valve.

[0094] The input end of the flow controller is connected to the output end of the air-controlled pressure reducing valve, and the output end of the flow controller is connected to the subsequent gas circuit; the flow controller is electrically connected to the electrical proportional pressure reducing valve to obtain the electrical signal sent by the electrical proportional pressure reducing valve.

[0095] In the above-mentioned system of the embodiment of the utility model, the electric proportional pressure reducing valve determines the adjustment amount of the pilot gas based on the comparison result of the target pressure of the gas circuit and the actual outlet pressure data monitored by the pressure sensor, and adjusts the size of the outlet pressure according to the adjustment amount of the pilot gas, so that the outlet pressure of the gas-controlled pressure reducing valve is output with the target pressure; the gas-controlled pressure reducing valve in the system is arranged in the first pipeline, and the electric proportional pressure reducing valve is arranged in the second pipeline, and the gas-controlled pressure reducing valve and the electric proportional pressure reducing valve can be separated in physical space to improve the safety of the construction environment. When it is necessary to ensure the constant flow output, the flow controller adjusts the size of the outlet flow based on the electrical signal sent by the electric proportional pressure reducing valve. The system adjusts the outlet pressure by combining the electric proportional pressure reducing valve and the gas-controlled pressure reducing valve. The electric proportional pressure reducing valve and the gas-controlled pressure reducing valve are isolated and arranged to avoid the unsafe problems in the prior art. At the same time, due to the arrangement of the electric proportional pressure reducing valve, the pressure regulating system can be remotely controlled, thereby improving the work efficiency.

[0096] Unless otherwise specifically stated, terms such as processing, computing, calculating, determining, displaying, etc. may refer to the actions and / or processes of one or more processing or computing systems, or similar devices, which operate and convert data represented as physical (e.g., electronic) quantities within registers or memories of a processing system into other data similarly represented as physical quantities within memories, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals may be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0097] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0098] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the attached claims, the utility model is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the attached claims are hereby expressly incorporated into the detailed description, with each claim acting alone as a separate preferred embodiment of the utility model.

[0099] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0100] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0101] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0102] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A pressure regulating system, characterized in that: include: A pressure sensor, a gas-controlled pressure reducing valve arranged on a first pipeline, and an electric proportional pressure reducing valve arranged on a second pipeline connected in parallel with the first pipeline; The pressure sensor is used to monitor the gas pressure at the outlet of the gas-controlled pressure reducing valve and send outlet pressure data to the electrical proportional pressure reducing valve; The electrical proportional pressure reducing valve is used to provide pilot gas for the gas-controlled pressure reducing valve, and to adjust the pressure of the pilot gas according to the outlet pressure data and the target pressure of the gas circuit; The gas-controlled pressure reducing valve is used to reduce the pressure of the input gas based on the pilot gas provided by the electrical proportional pressure reducing valve and then output the gas; The air-controlled pressure reducing valve of the first pipeline and the electrical proportional pressure reducing valve of the second pipeline are disconnected or connected via a pilot chamber.

2. The pressure regulating system according to claim 1, characterized in that: Also includes: at least one first pressure reducing valve; The first pressure reducing valve is arranged at the branch connection position between the first pipeline and the second pipeline or on the first pipeline before the branch connection position, and is used to output the gas input from the external gas source to the first pipeline and the second pipeline after performing a first proportional pressure attenuation.

3. The pressure regulating system according to claim 2, characterized in that: Also includes: at least one second pressure relief valve; The second pressure reducing valve is arranged on the second pipeline and is located before the electrical proportional pressure reducing valve, and is used for performing a second proportional pressure attenuation on the gas input into the second pipeline and then outputting the gas to the electrical proportional pressure reducing valve.

4. The pressure regulating system according to claim 3, characterized in that: Also includes: Flow controller; The flow controller is arranged on the first pipeline and located after the gas-controlled pressure reducing valve, and is used to adjust the outlet flow of the gas-controlled pressure reducing valve based on the electrical signal sent by the electrical proportional pressure reducing valve, and the electrical signal is generated according to the target flow data of the gas circuit.

5. The pressure regulating system according to claim 1, characterized in that: When the pressure regulating system is in use, the pneumatically controlled pressure reducing valve is located in an environment with a pressure higher than a first pressure threshold, and the electrical proportional pressure reducing valve is located in an environment with a pressure lower than a second pressure threshold, and the first pressure threshold is greater than the second pressure threshold.

6. The pressure regulating system according to claim 1, characterized in that: The electric proportional pressure reducing valve comprises: an air path outlet, an air path inlet, a first transceiver unit, an execution unit and a control interface; The gas circuit inlet is connected to the second pipeline, and the gas circuit outlet is connected to the pilot chamber; The first transceiver unit is connected to the pressure sensor and the flow controller to receive pressure data collected by the pressure sensor and send an electrical signal to the flow controller; The execution unit is used to determine the pressure adjustment amount of the pilot gas based on the outlet pressure data obtained by the transceiver unit and the target pressure of the gas circuit obtained by the control interface, and adjust the pressure of the pilot gas output from the gas circuit outlet based on the pressure adjustment amount; The control interface is externally connected to a system controller to obtain control data, wherein the control data includes a target pressure of the gas circuit and a target flow rate of the gas circuit.

7. The pressure regulating system according to claim 6, characterized in that: Execution unit, specifically used for: If the determined pressure adjustment amount is a positive value, increasing the pressure of the pilot gas output from the gas path outlet; If the determined pressure adjustment amount is a negative value, the pressure of the pilot gas output from the gas path outlet is reduced.

8. The pressure regulating system according to claim 4, characterized in that: The flow controller includes a second transceiver unit and a flow control unit: A second transceiver unit, used for receiving an electrical signal sent by the electrical proportional pressure reducing valve; A flow control unit is used to determine a flow adjustment amount based on the electrical signal, and adjust the outlet flow of the air-controlled pressure reducing valve according to the flow adjustment amount.

9. The pressure regulating system according to claim 8, characterized in that: Flow control unit, specifically used for: Acquiring a target flow rate of the gas circuit based on the electrical signal received by the second transceiver unit, and determining an adjustment amount of the flow rate according to the target flow rate and the current outlet flow rate of the gas-controlled pressure reducing valve; Based on the flow adjustment amount, the outlet flow of the air-controlled pressure-reducing valve is adjusted on the basis of the current outlet flow of the air-controlled pressure-reducing valve.

10. The pressure regulating system according to claim 4, characterized in that: The input end of the pressure sensor is connected to the air-controlled pressure reducing valve to obtain the outlet pressure data of the air-controlled pressure reducing valve, and the pressure sensor is electrically connected to the electrical proportional pressure reducing valve to send the outlet pressure data to the electrical proportional pressure reducing valve; The input end of the electrical proportional pressure reducing valve is connected to an external gas source; The output end of the electric proportional pressure reducing valve is connected to the second input end of the gas controlled pressure reducing valve; The first input end of the air-controlled pressure reducing valve is connected to a first pipeline; The input end of the first pressure reducing valve is connected to an external gas source, and the output end of the first pressure reducing valve is connected to a first pipeline and a second pipeline; The input end of the second pressure reducing valve is connected to the output end of the first pressure reducing valve, and the output end is connected to the input end of the electrical proportional pressure reducing valve; The input end of the flow controller is connected to the output end of the air-controlled pressure reducing valve, and the output end of the flow controller is connected to the subsequent gas circuit; the flow controller is electrically connected to the electrical proportional pressure reducing valve to obtain the electrical signal sent by the electrical proportional pressure reducing valve.

11. The pressure regulating system according to claim 1, characterized in that: Also includes: a system controller; The system controller is used to provide control data to the pressure regulating system; control the electrical proportional pressure reducing valve to adjust the pressure of the pilot gas and control the flow controller to adjust the outlet flow of the air-controlled pressure reducing valve; control the pressure sensor to send outlet pressure data to the electrical proportional pressure reducing valve; and control the electrical proportional pressure reducing valve to send an electrical signal to the flow controller.

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