Self-power-generating digital pressure reducing valve and pressure regulation method

Abstract

Disclosed is a self-power-generating digital pressure reducing valve, comprising a main valve (1), and further comprising an electric pressure reducing pilot valve (2). A water inlet port of the electric pressure reducing pilot valve (2) is connected to a water inlet end of the main valve (1) by means of a first pipe (3); a water outlet end of the main valve (1) is connected to a water outlet port of the electric pressure reducing pilot valve (2) by means of a second pipe (4); the water outlet port of the electric pressure reducing pilot valve (2) is connected to an upper diaphragm cavity of a main valve control chamber by means of a third pipe (5); a lower diaphragm cavity is connected to the outside by means of a fourth pipe (15); a fifth pipe (6) is further connected between the water inlet end and the water outlet end of the main valve (1); and a hydroelectric generator (7) is provided on the fifth pipe (6). The digital pressure reducing valve further comprises pressure detection devices (8) arranged before and after the main valve, and a controller for receiving detection signals of the pressure detection devices (8) so as to control the opening and closing of the electric pressure reducing pilot valve (2); and the hydroelectric generator (7) is connected to the pressure detection devices (8) and the electric pressure reducing pilot valve (2). The digital pressure reducing valve can achieve self-power generation to meet power utilization requirements of electric devices, and can be remotely regulated and controlled.

Description

A self-generating digital pressure reducing valve and pressure regulating method Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a self-generating digital pressure reducing valve and a pressure regulating method. Background Technology

[0002] In the industry, a combination of pressure reducing valves and electric pressure reducing pilot valves is commonly used to regulate the pressure at the downstream end of water pipelines. Electric pressure reducing pilot valves are power-consuming instruments; in remote outdoor areas, the inconvenience of connecting them to electricity can cause them to malfunction, ultimately affecting remote pressure control. Manually adjusting the electric pressure reducing pilot valve on-site is costly and time-consuming.

[0003] Existing technology CN200520050625.5 discloses a fully automatic adjustable pressure reducing valve, which is composed of a valve cover, a diaphragm seat, and a valve body connected in sequence. A control cavity is formed between the valve cover and the diaphragm seat, and an inner cavity is formed between the valve body and the diaphragm seat. A valve stem is installed in the inner cavity, penetrating the inner cavity and the control cavity. The lower end of the valve stem is provided with a valve plate that controls the opening and closing of the opening and closing port. The upper end of the valve stem is provided with a diaphragm that divides the control cavity into an upper control cavity and a lower control cavity. The diaphragm is clamped between diaphragm pressure plates. The valve body has a valve inlet and a valve outlet that communicate with the internal cavity of the valve body. A first exhaust valve is installed on the top of the valve cover; a second exhaust valve is installed next to the diaphragm seat; the valve inlet and valve outlet are respectively connected to a programmable automatic adjusting pilot valve through a connecting pipe. A motor is connected to the top of the programmable automatic adjusting pilot valve, and the motor is connected to a controller.

[0004] While existing technology discloses a fully automatic adjustable pressure reducing valve, it does not disclose self-generated power to meet the power requirements of the electric pressure reducing pilot valve. Therefore, current technology still cannot solve the problem of self-generated power to meet the power requirements of the electric pressure reducing pilot valve. Summary of the Invention

[0005] To overcome the above-mentioned defects, this invention discloses a self-generating digital pressure reducing valve to meet the power requirements of an electric pressure reducing valve.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] A self-generating digital pressure reducing valve is provided, comprising a main valve and an electric pressure reducing pilot valve. The inlet of the electric pressure reducing pilot valve is connected to the inlet of the main valve via a first pipeline. The outlet of the main valve is connected to the outlet of the electric pressure reducing pilot valve via a second pipeline. The outlet of the electric pressure reducing pilot valve is connected to the upper chamber of the diaphragm in the control chamber of the main valve via a third pipeline. The lower chamber of the diaphragm is connected to the outside via a fourth pipeline. A fifth pipeline is also connected between the inlet and outlet of the main valve, and a hydraulic generator is installed on the fifth pipeline. The digital pressure reducing valve also includes pressure detection devices installed before and after the main valve, and a controller that receives the inspection signals from the pressure detection devices to control the opening and closing of the electric pressure reducing pilot valve. The hydraulic generator is connected to the pressure detection devices and the electric pressure reducing pilot valve.

[0008] Preferably, filters are provided on the first pipeline and the fifth pipeline.

[0009] Preferably, ball valves are installed on the first pipeline and the second pipeline, and gate valves are installed on the fifth pipeline.

[0010] Preferably, the fourth pipeline is equipped with an electric valve and an automatic exhaust valve.

[0011] Preferably, the controller is connected to a mobile app.

[0012] Preferably, the controller is communicatively connected to a PC operating terminal.

[0013] Preferably, the flow regulating sleeve on the valve plate assembly of the main valve is provided with a circular water inlet hole and a V-shaped groove water inlet.

[0014] Preferably, the hydroelectric generator includes an impeller chamber disposed within a pipeline and a generator set disposed on one side of the impeller chamber. The generator set includes a housing, a stator and a rotor disposed within the housing. The rotor includes an impeller and a rotating shaft disposed at the center of the impeller. One end of the impeller is provided with a permanent magnet, and the other end is provided with blades. One end of the permanent magnet is correspondingly disposed with the stator. The blade ends are disposed within the impeller chamber. The blades rotate within the impeller chamber, driving the rotor to rotate. The impeller chamber connects the inlet and outlet of the pipeline. The inner wall of the impeller chamber includes two concentric arcs with different radii and a connecting arc connecting the two concentric arcs. The inner wall of the large-radius arc of the impeller chamber and the blades form a cavity for accommodating water flow.

[0015] A method for rapidly regulating the pressure of a self-generating digital pressure reducing valve is disclosed, the method specifically including the following steps:

[0016] S1: Pre-collect the pressure value of the main valve after the valve opening position corresponding to the electric pressure reducing pilot valve, and fit a multi-order curve function of the electric pressure reducing pilot valve opening position and the pressure after the main valve.

[0017] S2: Based on the actual pressure downstream of the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is calculated in reverse using a multi-order curve function;

[0018] S3: The electric pressure reducing pilot valve is adjusted to the corresponding valve opening degree by controlling the controller.

[0019] Preferably, in step S2, the multi-order curve function is calculated as follows:

[0020] In the formula, X is the pressure after the valve. The measured downstream pressure value; W represents all weighted values ​​obtained from the test, w0_w m As weight, This indicates the opening position of the electric pressure reducing pilot valve.

[0021] Preferably, step S2 further includes generating a coordinate graph with the valve opening position of the electric pressure reducing pilot valve as the horizontal coordinate and the pressure after the main valve as the vertical coordinate, based on the main valve downstream pressure value corresponding to the valve opening position of the electric pressure reducing pilot valve pre-collected in step S1.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0023] 1. By collecting pipeline pressure data and comparing it with the controller, the system controls the opening and closing of the electric pressure-reducing valve, ultimately adjusting the pipeline pressure to the desired value. This adjustment can be performed automatically over multiple time periods. The entire pressure regulation process requires no manual operation, and the downstream pressure can be directly monitored by the controller, achieving digital monitoring. Furthermore, a hydroelectric generator converts the kinetic energy of the water flow into electrical energy, meeting the power needs of the electric pressure-reducing valve, pressure detection device, and controller, eliminating the need for an external power source.

[0024] 2. A filter was installed, and the waterproof rating of the electric pressure reducing valve was upgraded to IP68.

[0025] 3. The controller connects to a mobile app, enabling remote control and monitoring via the app.

[0026] 4. The flow regulating sleeve on the valve plate assembly is equipped with a circular water inlet hole and a V-shaped groove water inlet, which has strong anti-cavitation ability, can not only eliminate water hammer, but also reduce noise. Attached Figure Description

[0027] Figure 1 is a schematic diagram of a self-generating digital pressure reducing valve according to the present invention.

[0028] Figure 2 is a cross-sectional view of a hydraulic generator in a self-generating digital pressure reducing valve according to the present invention.

[0029] Figure 3 is a schematic diagram of the main valve plate component in a self-generating digital pressure reducing valve of the present invention.

[0030] Figure 4 is a schematic diagram of the pressure regulation method of a self-generating digital pressure reducing valve according to the present invention. Detailed Implementation

[0031] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0033] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0036] Example 1

[0037] As shown in Figure 1, where arrows indicate the direction of medium flow, a self-generating digital pressure reducing valve is disclosed. It includes a main valve 1 and an electric pressure reducing pilot valve 2. The inlet of the electric pressure reducing pilot valve 2 is connected to the inlet of the main valve 1 via a first pipe 3. The outlet of the main valve 1 is connected to the outlet of the electric pressure reducing pilot valve 2 via a second pipe 4. The outlet of the electric pressure reducing pilot valve 2 is connected to the upper diaphragm chamber of the main valve 1 via a third pipe 5. The lower diaphragm chamber is connected to the outside via a fourth pipe 15. A fifth pipe 6 connects the inlet and outlet of the main valve 1, and a hydroelectric generator 7 is installed on the fifth pipe 6. The digital pressure reducing valve also includes a pressure detection device 8 installed before and after the main valve 1, and a controller that receives signals from the pressure detection device 8 to control the opening and closing of the electric pressure reducing pilot valve 2. The hydroelectric generator 7 is connected to the pressure detection device 8 and the electric pressure reducing pilot valve 2.

[0038] In this embodiment, the main valve 1 is the valve body of the pressure reducing valve. The inlet of the electric pressure reducing pilot valve 2 is connected to the inlet of the main valve 1 via the first pipe 3. The outlet of the main valve 1 is connected to the outlet of the electric pressure reducing pilot valve 2 via the second pipe 4. The outlet of the electric pressure reducing pilot valve 2 is connected to the upper diaphragm chamber of the main valve 1 via the third pipe 5. The lower diaphragm chamber is connected to the outside via the fourth pipe 15, such as directly to the outlet pipe of the main valve 1. Through the above design, the pressure reducing valve and the electric pressure reducing pilot valve 2 are combined together. At the same time, a fifth pipe 6 is also connected between the inlet and outlet of the main valve 1, and a hydroelectric generator 7 is installed on the fifth pipe 6. The hydroelectric generator 7 converts the kinetic energy of the water flow into electrical energy to achieve self-generation. Pressure detection devices 8 are installed on the pipelines before and after the main valve 1, and flow detection devices may also be installed. The pressure detection device 8 can specifically be a pressure transmitter. The controller receives the pressure data detected by the pressure transmitter, thereby remotely controlling the opening and closing of the electric pressure-reducing pilot valve 2, thus achieving automatic pressure regulation after the main valve 1. The electric pressure-reducing pilot valve 2 is controlled electrically. Therefore, the hydroelectric generator 7 is connected to the pressure detection device 8, flow detection device, controller, electric valve, and electric pressure-reducing pilot valve 2, providing power to the transmitter, electric pressure-reducing pilot valve 2, controller, and electric valve. This allows the digital pressure-reducing valve to be used in remote areas where external power cannot be connected. In this embodiment, the pressure detection device 8 collects the pipeline pressure, and the controller compares the collected pressure to control the opening or closing of the electric pressure-reducing pilot valve 2, ultimately adjusting the pipeline pressure to the desired value. The entire pressure regulation process requires no manual operation, and the pressure value after the pipeline is collected by the controller and transmitted to the Internet of Things (IoT) platform. Monitoring is achieved through a central control system or mobile phone access to the IoT platform. Furthermore, the kinetic energy of the water flow is converted into electrical energy by the hydroelectric generator 7, meeting the power requirements of the electric pressure reducing pilot valve 2 and the pressure detection device 8, eliminating the need for an external power supply and making this digital pressure reducing valve more versatile. The pressure reducing valve and the electric pressure reducing pilot valve 2 are standard products in the industry, and their combined application for adjusting water pressure is also a common practice; therefore, a detailed description of their adjustment principle is omitted here.

[0039] As shown in Figure 2, the hydroelectric generator 7 includes an impeller chamber 17 located inside the pipe 16 and a generator set located on one side of the impeller chamber 17. The generator set includes a housing, a stator and a rotor located inside the housing. The rotor includes an impeller 20 and a rotating shaft located at the center of the impeller. One end of the impeller 20 is provided with a permanent magnet, and the other end is provided with blades. One end of the permanent magnet is correspondingly arranged with the stator. The blade ends are located inside the impeller chamber 17. The blades rotate inside the impeller chamber 17, driving the rotor to rotate. The impeller chamber 17 connects the inlet 18 and outlet 19 of the pipe. The inner wall of the impeller chamber 17 includes two concentric large-radius arcs 21 and small-radius arcs 22, and a connecting arc 23 connecting the two concentric arcs. The inner wall of the large-radius arc 21 of the impeller chamber 17 and the blades form a cavity for accommodating water flow. When water flows into the impeller chamber 17 from the inlet 18, the kinetic energy of the water drives the impeller 20 to rotate. At the same time, the water filling the chamber also drives the impeller 20 to rotate as it flows. This greatly improves the utilization rate of the water's kinetic energy, increases the rotational speed of the impeller 20, and ultimately increases the power generation capacity.

[0040] In this embodiment, flow detection devices can also be installed before and after the main valve 1. The flow detection devices are connected to the controller, and the flow data collected by the controller is transmitted to the Internet of Things platform. The flow can be remotely monitored through the central control or mobile phone.

[0041] Example 2

[0042] As shown in Figure 1, the difference between this embodiment and Embodiment 1 is that a filter 9 is installed on the first pipeline 3 to filter impurities in the water, preventing them from entering the electric pressure reducing valve 2 and thus avoiding the valve's sensitivity or inability to regulate pressure due to impurities. Similarly, a filter 9 can also be installed on the fifth pipeline 6 to filter impurities in the water, preventing them from entering the hydroelectric generator 7 and affecting power generation.

[0043] Specifically, ball valves 10 can be installed on the first pipeline 3 and the second pipeline 4 respectively. Ball valves 10 are mainly used to control the opening or closing of the pipeline and are normally open during operation. A gate valve 21 is installed on the fifth pipeline 6. Gate valve 21 is mainly used to regulate the generator flow rate and adjust it to meet the power generation capacity of the entire system during operation.

[0044] An electric valve can also be installed on the fourth pipeline 15. The electric valve is connected to the controller, which controls its opening and closing. The electric valve regulates the pressure in the lower chamber of the diaphragm. When the outlet pressure of the self-generating digital pressure reducing valve rises to a certain set range, the controller collects pressure data. The IoT platform receives the pressure data detected by the pressure transmitter. When the pressure exceeds the upper limit, the IoT platform sends a command to the controller to control its opening. When the pressure in the lower chamber of the diaphragm drops to the upper limit, the valve plate assembly closes, thereby stabilizing the outlet pressure of the main valve.

[0045] Example 3

[0046] The difference between this embodiment and Embodiment 1 is that the controller is connected to a mobile app. This design allows for remote monitoring of pipeline pressure via the app, as well as setting expected pipeline pressure or adjusting pipeline pressure for different time periods. Specifically, the controller can also be connected to a PC for remote control.

[0047] Example 4

[0048] As shown in Figure 3, the difference between this embodiment and Embodiment 1 is that the flow regulating sleeve on the valve plate assembly of the main valve 1 includes a cylindrical sleeve disposed at the bottom of the pressure reducing valve plate. At least one ring of water inlet holes is provided on the side wall of the cylindrical sleeve near the valve plate, and at least one V-groove is also provided on the side wall of the cylindrical sleeve. The water inlet holes on the same ring are symmetrically arranged. The V-groove and the circularly arranged water inlet holes on the cylindrical sleeve significantly increase the flow area and improve the valve's flow rate compared to using simple circular holes as water inlet holes. Simultaneously, the symmetrical arrangement of the water inlet holes on the same ring ensures that when high-pressure external water enters through the water inlet holes, water also enters through the symmetrically arranged water inlet holes. The two water flows counteract each other within the cylindrical sleeve, thus preventing water from impacting the inner wall of the cylindrical sleeve and reducing cavitation.

[0049] Additionally, waterproof sealing rings can be installed at the joints of each pipe.

[0050] (Please refer to the labels in Figure 3 for the above description of Example 4)

[0051] Example 5

[0052] A method for rapidly regulating the pressure of a self-generating digital pressure reducing valve is disclosed, specifically including the following steps:

[0053] S1: Pre-collect the pressure value of the main valve after the valve opening position corresponding to the electric pressure reducing pilot valve, and fit a multi-order curve function of the electric pressure reducing pilot valve opening position and the pressure after the main valve.

[0054] S2: Based on the actual pressure downstream of the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is calculated in reverse using a multi-order curve function;

[0055] S3: The electric pressure reducing pilot valve is adjusted to the corresponding valve opening degree by controlling the controller.

[0056] In step S2, the calculation method for the multi-order curve function is as follows:

[0057] In the formula, X is the pressure after the valve. The measured downstream pressure value; W represents all weighted values ​​obtained from the test, w0_w m As weight, This indicates the opening position of the electric pressure reducing pilot valve.

[0058] The pressure downstream of the main valve is regulated by controlling the electric pressure-reducing pilot valve. However, it takes a considerable amount of time for the downstream pressure to stabilize from its initial state; that is, the change in downstream pressure exhibits a lag. Therefore, it is difficult to quickly adjust the electric pressure-reducing pilot valve to the correct position during operation.

[0059] In this embodiment, by pre-collecting the downstream pressure corresponding to the opening position of the electric pressure-reducing pilot valve, a multi-order curve function relating the opening position of the electric pressure-reducing pilot valve to the downstream pressure of the main valve is fitted. When adjustment of the downstream pressure is required, the opening position of the electric pressure-reducing pilot valve can be directly adjusted to the corresponding opening position by reverse calculation. After ensuring pressure stability, the downstream pressure is at the expected value, thereby accurately regulating the downstream pressure and greatly shortening the pressure adjustment time.

[0060] Simultaneously, based on the pre-collected pressure value of the main valve following the valve opening position, a coordinate graph can be generated with the valve opening position of the electric pressure-reducing pilot valve as the horizontal axis and the pressure following the main valve as the vertical axis. By looking up the table, the valve opening of the electric pressure-reducing pilot valve can be quickly adjusted. Specifically, when adjusting the valve, first determine the required pressure following the main valve based on the operating conditions, select the valve opening value corresponding to the required pressure following the main valve on the coordinate graph, and adjust the valve opening to that value. The pressure following the main valve will then reach the required pressure value.

[0061] In the accompanying drawings, the same or similar reference numerals correspond to the same or similar components; the positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Clearly, the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not intended to limit the implementation of the invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A self-generating digital pressure reducing valve comprising a main valve, characterized in that, It also includes an electric pressure-reducing pilot valve, the inlet of which is connected to the inlet of the main valve via a first pipeline, the outlet of the main valve via a second pipeline to the outlet of the electric pressure-reducing pilot valve, and the outlet of the electric pressure-reducing pilot valve via a third pipeline to the upper diaphragm chamber of the main valve control chamber; the lower diaphragm chamber of the main valve is connected to the outside via a fourth pipeline, and a fifth pipeline is connected between the inlet and outlet of the main valve, on which a hydroelectric generator is installed; it also includes pressure detection devices installed before and after the main valve, and a controller that receives the inspection signals from the pressure detection devices to control the opening and closing of the electric pressure-reducing pilot valve; the hydroelectric generator is connected to the pressure detection devices and the electric pressure-reducing pilot valve.

2. A self-generating digital pressure reducing valve according to claim 1, wherein Filters are installed on the first and fifth pipelines.

3. A self-generating digital pressure reducing valve according to claim 1, wherein Ball valves are installed on the first and second pipelines respectively, and gate valves are installed on the fifth pipeline.

4. A self-generating digital pressure reducing valve according to claim 1, wherein The fourth pipeline is equipped with an electric valve and an automatic air vent valve.

5. A self-generating digital pressure reducing valve according to claim 1, wherein The controller is connected to a mobile app; the controller is also connected to a PC operating terminal.

6. A self-generating digital pressure reducing valve according to claim 1, wherein The main valve's valve plate assembly has a circular water inlet hole and a V-shaped groove water inlet on its flow regulating sleeve.

7. A self-generating digital pressure reducing valve according to claim 1, wherein The hydroelectric generator includes an impeller chamber located inside a pipeline and a generator set located on one side of the impeller chamber. The generator set includes a housing, a stator and a rotor located inside the housing. The rotor includes an impeller and a rotating shaft located at the center of the impeller. One end of the impeller is provided with a permanent magnet, and the other end is provided with blades. One end of the permanent magnet is correspondingly arranged with the stator. The blade ends are located inside the impeller chamber. The blades rotate inside the impeller chamber, driving the rotor to rotate. The impeller chamber connects the inlet and outlet of the pipeline. The inner wall of the impeller chamber includes two concentric arcs with different radii and a connecting arc connecting the two concentric arcs. The inner wall of the large-radius arc of the impeller chamber and the blades form a cavity for accommodating water flow.

8. A method for rapidly regulating the pressure of the self-generating digital pressure reducing valve according to any one of claims 1 to 7, the method specifically comprising the following steps: S1: Pre-collect the pressure value of the main valve after the valve opening position corresponding to the electric pressure reducing pilot valve, and fit a multi-order curve function of the electric pressure reducing pilot valve opening position and the pressure after the main valve. S2: Based on the actual pressure downstream of the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is calculated in reverse using a multi-order curve function; S3: The controller controls the electric pressure reducing pilot valve to adjust to the corresponding valve opening, thereby ensuring that the pressure after the main valve is within the expected value.

9. The method of regulating the pressure of a self-generating digital pressure reducing valve according to claim 8, wherein, In the step S2, the multi-order curve function is calculated in the following manner: wherein X is the pressure after the valve, W is the measured pressure value after the valve; W is the weight value of all the tests, w0_w m W is the weight, This indicates the opening position of the electric pressure reducing pilot valve.

10. The method of regulating the pressure of a self-generating digital pressure reducing valve according to claim 9, wherein, Step S2 further includes: generating a coordinate graph with the valve opening position of the electric pressure reducing pilot valve as the horizontal coordinate and the pressure after the main valve as the vertical coordinate, based on the pressure value after the main valve corresponding to the valve opening position of the electric pressure reducing pilot valve pre-collected in step S1.

Images