Steady-flow multi-stage pressure reducing valve

Abstract

The invention provides a steady-flow multistage pressure reducing valve, and relates to the technical field of pressure reducing valves, the steady-flow multistage pressure reducing valve comprises a multistage curved pipeline system, the multistage curved pipeline system is composed of annularly distributed inlets and outlets, each stage of curved pipeline is communicated in a valve body, and the inlets and the outlets are distributed at intervals; a bend at the tail end of the main runner and the inner wall of the branch runner form a reverse impact structure which is used for reducing fluid pressure; according to a fixed type design without movable parts, pressure adjustment is achieved through the hydrodynamic principle, mechanical driving elements are not needed, geometrical parameters of the curved pipeline include that the ratio of the main runner length (# imgabs0 #) to the branch runner length (# imgabs1 #) is 2: 1 to 5: 1, and fluid pressure can be greatly adjusted while fluid circulation is kept. The fluid energy loss in the pressure reducing process is reduced, and the pressure reducing accuracy of the pressure reducing valve is improved. The number of movable parts of equipment is small, mechanical abrasion and maintenance requirements are reduced, and the reliability and durability of the valve are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure reducing valves, and more specifically, relates to a flow-stabilizing multi-stage pressure reducing valve. Background Art

[0002] Current mechanical pressure-reducing valves reduce pressure by reducing the cross-sectional area of ​​the flow path. This limited cross-sectional area results in a relatively narrow pressure-reduction range and makes it difficult to maintain continuous flow at high pressures. Furthermore, if the resistance of the fluid being reduced is high, the force required to open and close the valve is also high, increasing operational difficulty and valve wear. Existing mechanical pressure-reducing valves require regular maintenance, including replacement, cleaning, and lubrication of internal seals. This requires advanced technical expertise and results in high maintenance costs. Currently, when high-pressure liquid flows into pipelines, pressure-reducing valves mostly utilize isolating switches. This reduces pressure by isolating the fluid or reducing the cross-sectional area of ​​the flow path, creating varying resistances and pressure losses. Pressure-reducing valves are widely used in high-rise buildings, areas with excessively high water pressure in urban water supply networks, and mines to ensure appropriate service pressure and flow at each water point in the water supply system. Pressure-reducing valves also improve system operating conditions and potentially save water, potentially saving approximately 30%. As industrial production processes develop towards larger-scale and more sophisticated processes, higher requirements are placed on high-pressure regulating valves. Traditional pressure-reducing valves cannot meet the precise control of pressure reduction, and the control of fluid cross-section cannot maintain control of flow rate.

[0003] Existing technical solutions include: 1. The valve stem drives the valve core in rotational motion, as seen in ball valves and butterfly valves; 2. The valve core, driven by the valve stem, moves linearly up and down, as seen in tapered control valves. These valves can only roughly adjust the fluid flow rate, but cannot precisely control it. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a steady-flow multi-stage pressure-reducing valve to solve the above problems.

[0005] A steady-flow multi-stage pressure-reducing valve comprises: a multi-stage curved piping system consisting of annularly distributed inlets and outlets, with each stage of the curved piping running through the valve body, and the inlets and outlets spaced apart; a main channel and branch channels, wherein the end bend of the main channel and the inner wall of the branch channel form a reverse impact structure for reducing fluid pressure; a fixed design with no moving parts, achieving pressure regulation through the principles of fluid dynamics, without the need for mechanical drive elements.

[0006] Preferably, the geometric parameters of the curved pipeline include: the ratio of the main channel length (L1) to the branch channel length (L2) is 2:1 to 5:1; the angle (α) between the inner wall of the main channel and the end tangent is 30°-60°; the angle (β) between the inner wall of the branch channel and the inner wall of the main channel is 90°-120°, the inlet and outlet are distributed in concentric rings, and the spacing between adjacent pipelines is 1.5-3 times the pipe diameter to ensure uniform distribution of the fluid, the reverse impact structure guides the fluid to collide with the branch channel fluid through the bend at the end of the main channel, and the pressure drop is positively correlated with the inlet pressure (ΔP = k·P_in, k=0.2-0.5); the valve body is made of high-pressure resistant alloy material (yield strength ≥800MPa), and the internal surface roughness Ra≤0.8μm reduces turbulent energy loss, and the multi-stage curved pipeline system supports series or parallel configuration, the single-stage pressure reduction rate is 15%~30%, and the total pressure reduction rate can reach 70%~90% after multi-stage superposition.

[0007] Preferably, a steady flow multi-stage pressure reduction method comprises the following steps: introducing a high-pressure fluid into an annularly distributed curved pipe inlet; guiding the fluid to reversely impact the branch channel fluid through the bend at the end of the main channel to produce a pressure offset effect; gradually reducing the fluid pressure, and finally discharging the low-pressure fluid through the outlet. In the reverse impact step, the fluid velocity is controlled at 5-20 m / s, and the Reynolds number Re≥10 5 , ensuring efficient energy dissipation in turbulent conditions.

[0008] A steady-flow multi-stage pressure reduction system includes: a pressure sensor array for real-time monitoring of the inlet and outlet pressure difference (ΔP); an adaptive control system for dynamically adjusting fluid flow based on ΔP to maintain a target pressure output. The adaptive control system uses a PID algorithm to adjust the inlet valve opening, with a control accuracy of ±1% and a response time of ≤0.1 second.

[0009] Compared with the prior art, the present invention has the following beneficial effects: This invention allows for significant fluid pressure regulation while maintaining fluid flow. This reduces fluid energy loss during the pressure reduction process, improving the pressure reduction accuracy of the pressure-reducing valve. The device has fewer moving parts, reducing mechanical wear and maintenance requirements, and improving valve reliability and durability.

[0010] Wide range of pressure reduction: after multi-stage superposition, the total pressure reduction rate is increased to 90% (compared to the traditional 40%), and the applicable pressure range is 0.1-100MPa; Zero maintenance cost: The design with no moving parts eliminates mechanical wear and tear, reducing annual maintenance costs by 80%; High efficiency and energy saving: turbulence energy loss rate ≤ 5% (traditional ≥ 15%), energy saving rate increased by 3 times; High reliability: The life of high-pressure alloy valve body is ≥10 years, and the failure rate is reduced to 0.1 times / year; Adaptive control: PID algorithm achieves outlet pressure control accuracy of ±1% and response time ≤0.1 second. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the steady-flow multi-stage pressure reduction system of the present invention; Figure 2 This is a schematic structural diagram of the multi-stage pressure reducing valve of the present invention; Figure 3 Schematic diagram of the pressure application direction of the pressure reducing valve of the present invention; Figure 4 It is a schematic diagram of the flow channel structure of the pressure reducing valve of the present invention. DETAILED DESCRIPTION

[0012] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0013] See also Figure 1 - Figure 4 The present invention provides a steady-flow multi-stage pressure-reducing valve, comprising: a multi-stage curved pipeline system, consisting of annularly distributed inlets and outlets, each stage of the curved pipeline running through the valve body, with the inlets and outlets spaced apart; a main channel and a branch channel, wherein the end bend of the main channel and the inner wall of the branch channel form a reverse impact structure for reducing fluid pressure; a fixed design with no moving parts, which realizes pressure regulation through the principles of fluid dynamics without the need for mechanical drive elements.

[0014] The geometric parameters of the curved pipeline include: the ratio of the main channel length (L1) to the branch channel length (L2) is 2:1 to 5:1; the angle between the inner wall of the main channel and the tangent at the end (α) is 30°-60°; the angle between the inner wall of the branch channel and the inner wall of the main channel (β) is 90°-120°. The inlet and outlet are arranged in concentric rings, and the spacing between adjacent pipes is 1.5-3 times the pipe diameter to ensure uniform fluid distribution. The reverse impact structure guides the fluid through the bend at the end of the main channel to collide with the fluid in the branch channel. The pressure drop is positively correlated with the inlet pressure (ΔP = k·P_in, k=0.2-0.5). The valve body is made of high-pressure resistant alloy material (yield strength ≥800MPa) with an internal surface roughness Ra≤0.8μm to reduce turbulent energy loss. The multi-stage curved pipeline system can be configured in series or parallel. The single-stage pressure reduction rate is 15%-30%, and the total pressure reduction rate can reach 70%-90% after stacking multiple stages.

[0015] A steady-flow multi-stage pressure reduction method comprises the following steps: introducing a high-pressure fluid into an annularly distributed curved pipe inlet; guiding the fluid through the bend at the end of the main channel to reversely impact the branch channel fluid to produce a pressure offset effect; gradually reducing the fluid pressure and finally discharging the low-pressure fluid through the outlet. During the reverse impact step, the fluid velocity is controlled at 5-20 m / s and the Reynolds number Re≥10 5 , ensuring efficient energy dissipation in turbulent conditions.

[0016] A steady-flow multi-stage pressure reduction system includes: a pressure sensor array that monitors the inlet and outlet pressure difference (ΔP) in real time; an adaptive control system that dynamically adjusts the fluid flow rate based on ΔP to maintain the target pressure output. The adaptive control system uses a PID algorithm to adjust the inlet valve opening, with a control accuracy of ±1% and a response time of ≤0.1 second.

[0017] After sufficient liquid is injected into the device, the system continuously pressurizes the interior of the device in a linear manner. The space for storing liquid is reduced by the external pressure on the device, causing the temporarily stored liquid to flow out of the storage space along the internal gaps. To achieve continuous pressurization inside the device while preventing liquid leakage to the outside of the device due to excessive pressure, a pressure-reducing device is added to the front end of the pressurizing device. The pressure-reducing valve is equipped with multiple curved pipes. The inlets and outlets of the curved pipes are spaced apart in a ring shape on the outer layer of the pressure-reducing valve. The curved pipes are connected inside the pressure-reducing valve. When the liquid flows out of the storage space due to increased pressure, it enters the curved pipes and flows out of the curved pipes in the opposite direction of the liquid's outward flow, creating an impact with the outflowing liquid, achieving the pressure-reducing function.

[0018] Curved main channel length :

[0019] L2: Length of branch channel W: Pipe width α: Angle between the inner wall of the curved main channel and the tangent line at the end of the curved main channel β: Angle between the inner wall of the main channel and the inner wall of the branch channel Method for measuring the degree of blood pressure reduction:

[0020] ΔP: Pressure difference :Reducing valve inlet pressure : Pressure reducing valve outlet pressure.

[0021] Through the multi-stage connection of the pressure reducing valve, the pressure reducing capacity is gradually enhanced while maintaining the continuous flow of the fluid. It has a simple structure, no moving parts, and low cost. The pressure reducing valve will increase its pressure reducing capacity as the inlet pressure increases. In the linear continuous pressure increase environment imposed by the equipment, the pressure reducing capacity can be maintained. A single pressure reducing valve still has a one-way pressure reducing property.

[0022] Fluid enters the device at a linearly increasing pressure, splitting into two streams along the main and branch channels. The main channel then reverses direction through a bend at the end of the device and enters the branch channel, creating a reverse impact on the fluid in the branch channel, reducing the pressure of the fluid about to flow to the next stage. Compared to conventional mechanical pressure-reducing devices, this ensures continuous fluid flow within the device, significantly reducing pressure while maintaining unidirectional pressure reduction. The simplified structure also improves the stability and reliability of the device, reducing manufacturing and maintenance costs and the risk of accidents.

[0023] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A steady-flow multi-stage pressure-reducing valve, characterized in that: include: The multi-stage curved piping system consists of annularly distributed inlets and outlets. Each level of the curved piping runs through the valve body, with the inlets and outlets spaced apart. The main channel and the branch channel, wherein the end bend of the main channel and the inner wall of the branch channel form a reverse impact structure for reducing the fluid pressure; Fixed design with no moving parts, pressure regulation is achieved through fluid dynamics principles without the need for mechanical drive elements.

2. A steady flow multi-stage pressure reducing valve as claimed in claim 1, characterized in that: The geometric parameters of the curved pipeline include: Main channel length ( ) and the length of the branch channel ( ) ratio is 2:1 to 5:1; The angle (α) between the inner wall of the main channel and the tangent line at the end is 30°-60°; The angle (β) between the inner wall of the branch channel and the inner wall of the main channel is 90°-120°.

3. A steady flow multi-stage pressure reducing valve as claimed in claim 1, characterized in that: The inlet and outlet are spaced apart in concentric rings, and the distance between adjacent pipes is 1.5-3 times the pipe diameter to ensure uniform distribution of the fluid.

4. A steady-flow multi-stage pressure-reducing valve as claimed in claim 1, characterized in that: The reverse impact structure guides the fluid to collide with the fluid in the branch channel through the bend at the end of the main channel, and the pressure drop is positively correlated with the inlet pressure (ΔP = k·P_in, k=0.2-0.5).

5. The steady-flow multi-stage pressure-reducing valve according to claim 1, characterized in that: The valve body is made of high-pressure resistant alloy material (yield strength ≥ 800 MPa), and the internal surface roughness Ra ≤ 0.8 μm, which reduces turbulent energy loss.

6. A steady-flow multi-stage pressure-reducing valve as claimed in claim 1, characterized in that: The multi-stage curved pipeline system supports series or parallel configuration, with a single-stage pressure reduction rate of 15% to 30%, and a total pressure reduction rate of 70% to 90% after multi-stage superposition.

7. A method for steady flow multi-stage pressure reduction, characterized in that: The following steps are involved: Introducing high-pressure fluid into the annularly distributed curved pipe inlet; The fluid is guided to impact the branch channel fluid in the opposite direction through the bend at the end of the main channel, producing a pressure offset effect; The fluid pressure is gradually reduced and the low-pressure fluid is finally discharged through the outlet.

8. A method for steady-flow multi-stage voltage reduction as claimed in claim 7, characterized in that: In the reverse impact step, the fluid velocity is controlled at 5-20 m / s, and the Reynolds number Re≥ , ensuring efficient energy dissipation in turbulent conditions.

9. A steady-flow multi-stage pressure reduction system, characterized in that: include: The pressure reducing valve according to any one of claims 1 to 6; Pressure sensor array to monitor the inlet and outlet pressure difference (ΔP) in real time; The adaptive control system dynamically adjusts the fluid flow according to ΔP to maintain the target pressure output.

10. A steady-flow multi-stage pressure reduction system according to claim 9, characterized in that: The adaptive control system adjusts the inlet valve opening through the PID algorithm, with a control accuracy of ±1% and a response time of ≤0.1 seconds.

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