Self-power-generation digital pressure reducing valve and pressure regulating method

Abstract

The self-power-generation digital pressure reducing valve comprises a main valve and further comprises an electric pressure reducing guide valve, a water inlet of the electric pressure reducing guide valve is connected with a water inlet end of the main valve through a first pipeline, and a water outlet end of the main valve is connected with a water outlet of the electric pressure reducing guide valve through a second pipeline. A water outlet of the electric pressure reduction pilot valve is connected with a diaphragm upper cavity of the main valve control chamber through a third pipeline; the diaphragm lower cavity is connected with the outside through a fourth pipeline, a fifth pipeline is further connected between the water inlet end and the water outlet end of the main valve, and a hydroelectric generator is arranged on the fifth pipeline; the pressure detection devices are arranged in front of and behind the main valve; the controller is used for receiving detection signals of the pressure detection devices so as to control opening and closing of the electric pressure reduction pilot valve; and the hydroelectric generator is connected with the pressure detection device and the electric pressure reduction pilot valve. According to the digital pressure reducing valve, self power generation can be achieved, the power utilization requirement of electric equipment is met, and remote regulation and control can be achieved.

Description

Technical Field

[0001] The present 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 Art

[0002] In order to regulate the rear end pressure of the water pipeline, the industry often uses a combination of a pressure reducing valve and an electric pressure reducing pilot valve. The electric pressure reducing pilot valve is a power-consuming instrument. In remote outdoor areas, it is inconvenient to connect the electric pressure reducing pilot valve to electricity, which causes it to fail to work normally, ultimately affecting the remote regulation of pipeline pressure. When the electric pressure reducing pilot valve is manually adjusted on site, the labor cost is high and the waiting time is long.

[0003] The prior art CN200520050625.5 discloses a fully automatic adjustable pressure reducing valve, which is formed by connecting a valve cover, a diaphragm seat and a valve body 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 that passes through the inner cavity and the control cavity is installed in the inner cavity. A valve plate that controls the opening and closing of the opening and closing port is provided at the lower end of the valve stem, and a diaphragm that divides the control cavity into an upper cavity of the control cavity and a lower cavity of the control cavity is provided at the upper end of the valve stem. The diaphragm is clamped between diaphragm pressure plates. A valve inlet and a valve outlet that are connected to the internal cavity of the valve body are opened on 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 the valve outlet are respectively connected to a programmed automatic adjustment pilot valve through a connecting pipe, and a motor is connected to the top of the programmed automatic adjustment pilot valve, and the motor is connected to a controller.

[0004] Although the prior art discloses a fully automatically adjustable pressure reducing valve, it does not disclose self-generation to meet the power demand of the electric pressure reducing pilot valve. Therefore, current technology still cannot solve the problem of self-generation to meet the power demand of the electric pressure reducing pilot valve. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the present invention discloses a digital pressure reducing valve capable of self-generating electricity so as to meet the electricity demand of the electric pressure reducing pilot valve.

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

[0007] Provided is a self-generating digital pressure reducing valve, comprising a main valve and an electric pressure reducing pilot valve, wherein the water inlet of the electric pressure reducing pilot valve is connected to the water inlet end of the main valve through a first pipeline, the water outlet end of the main valve is connected to the water outlet of the electric pressure reducing pilot valve through a second pipeline, the water outlet of the electric pressure reducing pilot valve is connected to the diaphragm upper cavity of the main valve control chamber through a third pipeline; the diaphragm lower cavity is connected to the outside through a fourth pipeline, a fifth pipeline is further connected between the water inlet end and the water outlet end of the main valve, and a hydraulic generator is arranged on the fifth pipeline; the digital pressure reducing valve also comprises a pressure detection device arranged before and after the main valve, and a controller receiving a check signal of the pressure detection device to control the opening and closing of the electric pressure reducing pilot valve; the hydraulic generator is connected to the pressure detection device and the electric pressure reducing pilot valve.

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

[0009] Preferably, the first pipeline and the second pipeline are respectively provided with ball valves, and the fifth pipeline is provided with a gate valve.

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

[0011] Preferably, the controller is communicatively connected to a mobile phone APP.

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

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

[0014] Preferably, the hydroelectric generator includes an impeller chamber arranged in a pipeline, and a generator set arranged on one side of the impeller chamber, the generator set includes a casing, a stator and a rotor arranged in the casing, the rotor includes an impeller and a rotating shaft arranged in the center of the impeller, a permanent magnet is provided at one end of the impeller, and a blade is provided at the other end, one end of the permanent magnet is arranged corresponding to the stator, the blade end is arranged in the impeller chamber, and the blade rotates in the impeller chamber to drive the rotor to rotate; the impeller chamber is connected to the water inlet and the water 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; a cavity for accommodating water flow is formed between the inner wall of the large-radius arc of the impeller chamber and the blades.

[0015] Disclosed is a pressure regulating method for quickly regulating the pressure of a self-generating digital pressure reducing valve, the method specifically comprising the following steps:

[0016] S1: pre-collect the pressure value behind the main valve corresponding to the opening position of the electric pressure reducing pilot valve, and fit the multi-order curve function between the opening position of the electric pressure reducing pilot valve and the pressure behind the main valve;

[0017] S2: According to the actual pressure behind the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is reversely calculated through a multi-order curve function;

[0018] S3: The controller controls the electric pressure reducing pilot valve to adjust to the corresponding valve opening.

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

[0020]

[0021]

[0022] Where X is the pressure after the valve. is the measured pressure after the valve; W is all the weighted values ​​obtained in the test, w0-w m is the weight, It is the opening position of the electric pressure reducing pilot valve.

[0023] Preferably, step S2 further comprises generating a coordinate diagram with the valve opening position of the electric pressure reducing pilot valve as the horizontal coordinate and the valve opening pressure of the main valve as the vertical coordinate according to the main valve downstream pressure value corresponding to the valve opening position of the electric pressure reducing pilot valve collected in advance in step S1.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0025] 1. By collecting the pressure of the pipeline, the controller compares the collected pressure to control the opening or closing of the electric pressure reducing pilot valve, and finally adjusts the pressure after the pipeline to the expected value. The pressure after the pipeline can be automatically adjusted in multiple time periods to reach the expected value. The entire pressure regulation process does not require manual operation, and the pressure value after the pipeline can be directly monitored on the controller, realizing digital monitoring. In addition, the kinetic energy of the water flow is converted into electrical energy through the hydraulic generator to meet the power requirements of the electric pressure reducing pilot valve, pressure detection device, and controller, without the need for an external power supply.

[0026] 2. Install a filter and the waterproof level of the electric pressure reducing pilot valve is increased to IP68.

[0027] 3. The controller is connected to the mobile phone APP, and remote control and monitoring can be achieved through the mobile phone APP.

[0028] 4. The flow regulating sleeve on the valve plate assembly is provided with a circular water inlet hole and a V-groove water inlet, which has strong anti-cavitation ability, can not only eliminate water hammer but also reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure is a schematic diagram of a self-generating digital pressure reducing valve of the present invention.

[0030] Figure 2 The present invention is a cross-sectional view of a hydraulic generator in a self-generating digital pressure reducing valve.

[0031] Figure 3 The present invention is a schematic structural diagram of a valve plate main component in a self-generating digital pressure reducing valve.

[0032] Figure 4 The present invention is a schematic flow chart of a pressure regulating method for a self-generating digital pressure reducing valve. DETAILED DESCRIPTION

[0033] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0035] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0038] Example 1

[0039] like Figure 1 As shown in the figure, the arrow represents the flow direction of the medium, and a self-generating digital pressure reducing valve is disclosed, comprising a main valve 1 and an electric pressure reducing pilot valve 2, wherein the water inlet of the electric pressure reducing pilot valve 2 is connected to the water inlet end of the main valve 1 through a first pipeline 3, the water outlet end of the main valve 1 is connected to the water outlet of the electric pressure reducing pilot valve 2 through a second pipeline 4, and the water outlet of the electric pressure reducing pilot valve 2 is connected to the upper cavity of the diaphragm of the control chamber of the main valve 1 through a third pipeline 5; the lower cavity of the diaphragm is connected to the outside through a fourth pipeline 15, and a fifth pipeline 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 arranged on the fifth pipeline 6; the digital pressure reducing valve also comprises a pressure detection device 8 arranged before and after the main valve 1, and a controller receiving a check signal of 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.

[0040] In this embodiment, the main valve 1 is also the valve body of the pressure reducing valve, the water inlet of the electric pressure reducing pilot valve 2 is connected to the water inlet end of the main valve 1 through the first pipeline 3, the water outlet end of the main valve 1 is connected to the water outlet of the electric pressure reducing pilot valve 2 through the second pipeline 4, and the water outlet of the electric pressure reducing pilot valve 2 is connected to the upper cavity of the diaphragm of the control chamber of the main valve 1 through the third pipeline 5; the lower cavity of the diaphragm is connected to the outside through the fourth pipeline 15, such as the water outlet pipeline of the main valve 1 directly. 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 pipeline 6 is also connected between the water inlet end and the water outlet end of the main valve 1, and a hydroelectric generator 7 is arranged on the fifth pipeline 6. The kinetic energy of the water flow is converted into electrical energy by the hydroelectric generator 7 to achieve self-generation. The pipelines before and after the main valve 1 are respectively provided with pressure detection devices 8, and flow detection devices may also be provided. The pressure detection device 8 may specifically adopt a pressure transmitter, and 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, thereby realizing the automatic pressure regulation of the pressure after the main valve 1. The electric pressure reducing pilot valve 2 is controlled by electric control, and the electric valve is controlled by electric control; therefore, the hydraulic generator 7 is connected to the pressure detection device 8, the flow detection device, the controller, the electric valve and the electric pressure reducing pilot valve 2, thereby providing electric energy to the transmitter, the electric pressure reducing pilot valve 2, the controller and the electric valve, so that the digital pressure reducing valve can be used in remote areas where an external power supply cannot be connected. In this embodiment, the pressure of the pipeline is collected by the pressure detection device 8, and the opening or closing of the electric pressure reducing pilot valve 2 is controlled by the controller by comparing the collected pressure, and finally the pressure after the pipeline is adjusted to reach the expected value. The entire pressure regulation process does not require manual operation, and the pressure value after the pipeline is collected by the controller and transmitted to the Internet of Things platform by the pressure data collected by the controller, and the Internet of Things platform is monitored through the central control or mobile phone, realizing digital monitoring. In addition, the kinetic energy of the water flow is converted into electrical energy through the hydroelectric generator 7 to meet the power demand of the electric pressure reducing pilot valve 2 and the pressure detection device 8, without the need for an external power supply, making the digital pressure reducing valve more applicable. The pressure reducing valve and the electric pressure reducing pilot valve 2 are conventional products in the industry, and their combined application for adjusting the water pressure is also a conventional means in the industry, so the specific adjustment principle description is omitted here.

[0041] like Figure 2As shown, the hydroelectric generator 7 includes an impeller chamber 17 disposed in a pipeline 16, and a generator set disposed on one side of the impeller chamber 17. The generator set includes a housing, a stator and a rotor disposed in the housing. The rotor includes an impeller 20 and a rotating shaft disposed in the center of the impeller. A permanent magnet is disposed at one end of the impeller 20, and a blade is disposed at the other end. One end of the permanent magnet is disposed correspondingly to the stator. The blade end is disposed in the impeller chamber 17. The blade rotates in the impeller chamber 17 to drive the rotor to rotate. The impeller chamber 17 is connected to the water inlet 18 and the water outlet 19 of the pipeline. The inner wall of the impeller chamber 17 includes two concentrically disposed large radius arcs 21, a small radius arc 22, and a connecting arc 23 connecting the two concentric arcs. A cavity for accommodating water flow is formed between the inner wall of the large radius arc 21 of the impeller chamber 17 and the blades. When water flows into the impeller chamber 17 from the water inlet 18, the kinetic energy of the water flow will drive the impeller 20 to rotate. At the same time, the water flow filled in the cavity will drive the impeller 20 to rotate again when flowing. Thereby, the utilization rate of the kinetic energy of the water is greatly improved, the rotation speed of the impeller 20 is increased, and finally the power generation capacity is increased.

[0042] In this embodiment, flow detection devices can also be set before and after the main valve 1, and the flow detection devices are connected to the controller. The flow is collected by the controller and the flow data is transmitted to the Internet of Things platform, and the flow is remotely monitored through central control or mobile phone monitoring.

[0043] Example 2

[0044] like Figure 1 The difference between this embodiment and the embodiment 1 is that a filter 9 is provided on the first pipeline 3, and the filter 9 filters impurities in the water to prevent the impurities from entering the electric pressure reducing pilot valve 2, so as to prevent the electric pressure reducing pilot valve 2 from affecting the sensitivity of the pressure regulation or failing to regulate the pressure due to the impurities. At the same time, the fifth pipeline 6 can also be provided in the same way to filter impurities in the water to prevent the impurities from entering the hydroelectric generator 7, thereby affecting power generation.

[0045] Specifically, a ball valve 10 may be provided on the first pipeline 3 and the second pipeline 4, respectively. The ball valve 10 is mainly used to control the conduction or closing of the pipeline, and is in a normally open state in the working state. A gate valve 21 is provided on the fifth pipeline 6. The gate valve 21 is mainly used to adjust the flow of the generator, and is adjusted to meet the power consumption and power generation of the entire system in the working state.

[0046] An electric valve can also be provided on the fourth pipeline 15, and the electric valve is connected to the controller by communication, and the controller controls its conduction or closing. The electric valve adjusts the pressure of the lower cavity of the diaphragm. When the outlet pressure of the self-generating digital pressure reducing valve rises to a certain set range value, the pressure data is collected by the controller, and the Internet of Things platform receives the pressure data detected by the pressure transmitter. When the pressure exceeds the upper limit value, the Internet of Things platform gives an instruction to the controller to control its conduction. When the pressure of the lower cavity of the diaphragm drops to the upper limit value of the pressure, the valve plate assembly has a closing action, thereby controlling the main valve outlet pressure to be stable.

[0047] Example 3

[0048] The difference between this embodiment and embodiment 1 is that the controller is connected to the mobile phone APP. Through this design, not only can the pipeline pressure be checked on the mobile phone APP to achieve remote monitoring, but also the expected pipeline pressure or the pipeline pressure in different time periods can be set on the mobile phone APP to achieve remote adjustment. Specifically, the controller can also be connected to the PC operation terminal through communication, and remote control can be achieved by operating the PC operation terminal.

[0049] Example 4

[0050] like Figure 3 As shown, 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 arranged at the bottom of the valve plate of the pressure reducing valve, and at least one circle of water inlet holes is arranged on the side wall of the cylindrical sleeve adjacent to the valve plate, and at least one V-shaped groove is also arranged on the side wall of the cylindrical sleeve; the water inlet holes on the same circle are symmetrically arranged. Compared with using a simple circular hole as the water inlet hole, the V-shaped groove and the water inlet holes arranged in a circle on the cylindrical sleeve greatly increase the water flow area and the water flow rate of the valve. At the same time, the water inlet holes on the same circle are symmetrically arranged. When high-pressure external water flows into the water inlet holes, water also enters the symmetrically arranged water inlet holes. The two water flows collide in the cylindrical sleeve, thereby avoiding the water flow from impacting the inner wall of the cylindrical sleeve, thereby achieving the purpose of reducing cavitation.

[0051] At the same time, waterproof sealing rings can also be provided at the connections of the pipelines.

[0052] (Example 4 Please combine the above description with Figure 3 The number in the

[0053] Example 5

[0054] Disclosed is a pressure regulating method for quickly regulating the pressure of a self-generating digital pressure reducing valve, which specifically comprises the following steps:

[0055] S1: pre-collect the pressure value behind the main valve corresponding to the opening position of the electric pressure reducing pilot valve, and fit the multi-order curve function between the opening position of the electric pressure reducing pilot valve and the pressure behind the main valve;

[0056] S2: According to the actual pressure behind the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is reversely calculated through a multi-order curve function;

[0057] S3: The controller controls the electric pressure reducing pilot valve to adjust to the corresponding valve opening.

[0058] Among them, in step S2, the calculation method of the multi-order curve function is:

[0059]

[0060] Where X is the pressure after the valve. is the measured pressure after the valve; W is all the weighted values ​​obtained in the test, w0-w m is the weight, It is the opening position of the electric pressure reducing pilot valve.

[0061] By controlling the electric pressure reducing pilot valve to adjust the pressure behind the main valve, it takes a long time for the pressure behind the main valve to stabilize from the initial stage, that is, the change of the pressure behind the valve has a lag. During the operation, it is difficult to quickly adjust the electric pressure reducing pilot valve to the correct position.

[0062] In this embodiment, the valve back pressure corresponding to the opening position of the electric pressure reducing pilot valve is collected in advance, and a multi-order curve function of the opening position of the electric pressure reducing pilot valve and the valve back pressure of the main valve is fitted. When the valve back pressure needs to be adjusted, the electric pressure reducing pilot valve can be directly adjusted to the corresponding opening position by reversely calculating the opening position of the electric pressure reducing pilot valve. After ensuring that the pressure is stable, the valve back pressure is at the expected value, thereby accurately adjusting the valve back pressure and greatly shortening the pressure adjustment time.

[0063] At the same time, according to the pre-collected main valve downstream pressure value corresponding to the electric pressure reducing pilot valve valve opening position, a coordinate diagram with the electric pressure reducing pilot valve valve opening position as the horizontal coordinate and the main valve downstream pressure as the vertical coordinate can be generated. By looking up the table, the adjustment of the electric pressure reducing pilot valve valve opening can be completed quickly. Specifically, when adjusting the valve, first determine the required main valve downstream pressure according to the working conditions, select the valve opening value corresponding to the required main valve downstream pressure on the coordinate diagram, adjust the valve opening to the opening value, and the main valve downstream pressure will reach the required pressure value.

[0064] The same or similar numbers in the drawings correspond to the same or similar parts; the positional relationships described in the drawings are used for illustrative purposes only and should not be construed as limitations on this patent. Obviously, the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 water inlet of the electric pressure-reducing pilot valve is connected to the water inlet end of the main valve through a first pipeline, the water outlet end of the main valve is connected to the water outlet of the electric pressure-reducing pilot valve through a second pipeline, and the water outlet of the electric pressure-reducing pilot valve is connected to the upper cavity of the diaphragm of the main valve control chamber through a third pipeline; the lower cavity of the diaphragm of the main valve is connected to the outside through a fourth pipeline, and a fifth pipeline is also connected between the water inlet and the water outlet of the main valve, and a hydraulic generator is arranged on the fifth pipeline; it also includes a pressure detection device arranged before and after the main valve, and a controller that receives a check signal from the pressure detection device to control the opening and closing of the electric pressure-reducing pilot valve; the hydraulic generator is connected to the pressure detection device and the electric pressure-reducing pilot valve.

2. A self-generating digital pressure reducing valve according to claim 1, characterized in that: Filters are provided on the first pipeline and the fifth pipeline.

3. A self-generating digital pressure reducing valve according to claim 1, characterized in that: The first pipeline and the second pipeline are respectively provided with ball valves, and the fifth pipeline is provided with a gate valve.

4. A self-generating digital pressure reducing valve according to claim 1, characterized in that: The fourth pipeline is provided with an electric valve and an automatic exhaust valve.

5. The self-generating digital pressure reducing valve according to claim 1, characterized in that: The controller is connected to the mobile phone APP for communication; the controller is also connected to the PC operation terminal for communication.

6. The self-generating digital pressure reducing valve according to claim 1, characterized in that: A circular water inlet hole and a V-shaped groove water inlet are arranged on the flow regulating sleeve on the valve plate assembly of the main valve.

7. The self-generating digital pressure reducing valve according to claim 1, characterized in that: The hydroelectric generator includes an impeller chamber arranged in a pipeline, and a generator set arranged on one side of the impeller chamber. The generator set includes a shell, a stator and a rotor arranged in the shell. The rotor includes an impeller and a rotating shaft arranged in the center of the impeller. A permanent magnet is provided at one end of the impeller, and a blade is provided at the other end. One end of the permanent magnet is arranged corresponding to the stator. The blade end is arranged in the impeller chamber, and the blade rotates in the impeller chamber to drive the rotor to rotate. The impeller chamber is connected to the water inlet and the water 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. A cavity for accommodating water flow is formed between the inner wall of the large-radius arc of the impeller chamber and the blades.

8. A method for quickly 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 behind the main valve corresponding to the opening position of the electric pressure reducing pilot valve, and fit the multi-order curve function between the opening position of the electric pressure reducing pilot valve and the pressure behind the main valve; S2: According to the actual pressure behind the main valve to be controlled, the valve opening of the electric pressure reducing pilot valve is reversely calculated through 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 at the expected value.

9. A pressure regulating method for a self-generating digital pressure reducing valve according to claim 8, characterized in that: In step S2, the multi-order curve function is calculated as follows: Where X is the pressure after the valve. is the measured pressure after the valve; W is all the weight values ​​obtained in the test, ω0-ω m is the weight, It is the opening position of the electric pressure reducing pilot valve.

10. A pressure regulating method for a self-generating digital pressure reducing valve according to claim 9, characterized in that: The step S2 further comprises: generating a coordinate diagram with the valve opening position of the electric pressure reducing pilot valve as the horizontal coordinate and the valve downstream pressure of the main valve as the vertical coordinate according to the valve downstream pressure value of the main valve corresponding to the valve opening position of the electric pressure reducing pilot valve collected in advance in the step S1.

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