Intelligent pressure reducing valve based on fluid pressure self-regulation

Abstract

The present invention relates to the technical field of pressure reducing valves, and in particular to an intelligent pressure reducing valve based on fluid pressure self-regulation, comprising: a pressure reducing valve body; an execution module for changing the pressure of a fluid according to a monitoring signal; a detection module connected to the execution module for collecting characteristic parameters of the pressure reducing valve, wherein the characteristic parameters of the pressure reducing valve include the fluid flow rate output by the pressure reducing valve body, the pressure of the fluid inside the pressure reducing valve, and the vibration intensity of the pressure reducing valve body; a control module connected to the execution module and the detection module respectively for adjusting the opening speed of the pressure reducing valve body or preliminarily determining that the sensitivity of the solenoid valve does not meet the requirements when the variance of the fluid flow rate output by the pressure reducing valve body determines that the operating stability of the pressure reducing valve does not meet the requirements, and secondarily determining whether the sensitivity of the solenoid valve meets the requirements according to the average response time of the solenoid valve. The present invention achieves the improvement of the operating stability of the pressure reducing valve.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, and in particular to an intelligent pressure reducing valve based on fluid pressure self-regulation. Background Art

[0002] In the prior art, an intelligent pressure reducing valve is a pressure regulating device with intelligent functions and self-regulating capabilities. It can automatically adjust the opening of the pressure reducing valve according to the changes in the input fluid pressure to ensure that the output pressure is stable within the set range.

[0003] Chinese Patent Publication No.: CN107606295A discloses an intelligent tap water pressure reducing valve with a thawing function based on the Internet of Things, comprising an adjusting handle, an adjusting pipe and two water pipes, the bottom end of the adjusting handle is arranged in the adjusting pipe, the two water pipes are respectively arranged on both sides of the bottom end of the adjusting pipe, the adjusting pipe is connected with the water pipe, and is characterized in that a thawing mechanism and a telescopic mechanism are arranged on both sides of the adjusting pipe, the thawing mechanism comprises a side plate, a heating box, a water pump, a guide pipe, a winding pipe, a return pipe and an insulation pipe, the side plate is fixed on the adjusting pipe, the heating box is fixed above the side plate, the water pump is fixed above the heating box, the water pump is connected with one end of the winding pipe through the guide pipe, the other end of the winding pipe is connected with the heating box through the return pipe, the winding pipe is arranged in the insulation pipe, the winding pipe is wound on the outer periphery of the water pipe, the winding pipe is spirally distributed along the axis of the water pipe, the insulation pipe is sleeved on the water pipe, the telescopic mechanism is arranged below the side plate, and the telescopic mechanism is transmission-connected with the insulation pipe. It can be seen that the intelligent tap water pressure reducing valve with thawing function based on the Internet of Things has the problem that the pressure in the pressure reducing valve is unbalanced during the control process due to the wear of the sealing ring of the pressure reducing valve, thereby causing the stability of the control system to decrease. Summary of the invention

[0004] To this end, the present invention provides an intelligent pressure reducing valve based on fluid pressure self-regulation to overcome the problem in the prior art that the pressure in the pressure reducing valve is unbalanced during the control process due to wear of the sealing ring of the pressure reducing valve, thereby reducing the stability of the control system.

[0005] To achieve the above-mentioned object, the present invention provides an intelligent pressure reducing valve based on fluid pressure self-regulation, comprising: a pressure reducing valve body; an execution module, used to change the pressure of the fluid according to a monitoring signal, including an execution unit for adjusting the pressure of the fluid, a delivery unit connected to the execution unit for delivering the fluid, and a filter arranged above the execution unit for filtering the monitoring signal, wherein the execution unit includes a solenoid valve for controlling the fluid output pressure; a detection module, which is connected to the execution module, and is used to collect characteristic parameters of the pressure reducing valve, and the characteristic parameters of the pressure reducing valve include the fluid flow rate output by the pressure reducing valve body, the pressure of the fluid inside the pressure reducing valve, and the vibration intensity of the pressure reducing valve body; a control module, which is respectively connected to the execution module and the detection module, and is used to adjust the opening speed of the pressure reducing valve body or preliminarily determine that the sensitivity of the solenoid valve does not meet the requirements when it is determined that the operating stability of the pressure reducing valve does not meet the requirements according to the variance of the fluid flow rate output by the pressure reducing valve body, and secondarily determine whether the sensitivity of the solenoid valve meets the requirements according to the average response time of the solenoid valve; and when the sensitivity is secondarily determined to be not met, adjust the cutoff frequency of the filter or adjust the valve opening of the pressure reducing valve according to the vibration intensity of the pressure reducing valve body.

[0006] Furthermore, the conveying unit comprises:

[0007] An input pipeline connected to the pressure reducing valve body and used for conveying fluid into the pressure reducing valve body;

[0008] An output pipeline is connected to the pressure reducing valve body and is used for outputting the fluid in the pressure reducing valve body.

[0009] Furthermore, the detection module includes:

[0010] A pressure sensor, which is arranged inside the pressure reducing valve body and is used to detect the pressure of the fluid;

[0011] A flow sensor connected to the output pipeline to detect the flow of the output fluid;

[0012] A vibration sensor is connected to the pressure reducing valve body and is used to detect the vibration intensity of the pressure reducing valve body.

[0013] Further, the control module is connected to the flow sensor to calculate the variance of the fluid flow output by the pressure reducing valve body according to the flow of the output fluid in a number of cycles, and to determine that the operating stability of the pressure reducing valve does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body satisfies the first variance condition or the second variance condition;

[0014] The control module is connected to the solenoid valve, and is used to preliminarily determine that the sensitivity of the solenoid valve does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body only satisfies the first variance condition, and to perform a secondary determination on whether the sensitivity of the solenoid valve meets the requirements according to the average response time of the solenoid valve;

[0015] The first variance condition is that the variance of the fluid flow output by the pressure reducing valve body is greater than the preset first variance and less than or equal to the preset second variance; the second variance condition is that the variance of the fluid flow output by the pressure reducing valve body is greater than the preset second variance.

[0016] Further, the control module is connected to the pressure reducing valve body, and is used to increase the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body only satisfies the second variance condition;

[0017] The increase range of the opening speed of the pressure reducing valve is determined by the difference between the variance of the fluid flow output by the pressure reducing valve body and a preset second variance.

[0018] Further, the control module is connected to the solenoid valve, and is used to make a secondary determination that the sensitivity of the solenoid valve does not meet the requirement when the average response time of the solenoid valve meets the first response time condition or the second response time condition, and to make a preliminary determination that the spatial stability of the solenoid valve does not meet the requirement when the average response time of the solenoid valve only meets the second response time condition, and to make a secondary determination on whether the spatial stability of the solenoid valve meets the requirement according to the vibration intensity of the pressure reducing valve body;

[0019] The control module is connected to the filter, and is used to reduce the cutoff frequency of the filter when the average response time of the solenoid valve only meets the first response time condition;

[0020] Among them, the first response time condition is that the average response time of the solenoid valve is greater than the preset first response time and less than or equal to the preset second response time; the second response time condition is that the average response time of the solenoid valve is greater than the preset second response time.

[0021] Furthermore, the calculation formula of the average response time of the solenoid valve is:

[0022]

[0023] Among them, Z is the average response time of the solenoid valve, X a is the response time of the solenoid valve in the ath control cycle, n is the number of control cycles, and n is a natural number greater than or equal to 1.

[0024] Furthermore, the reduction range of the cut-off frequency of the filter is determined by the difference between the average response time of the solenoid valve and the preset first response time.

[0025] Furthermore, the control module is connected to the vibration sensor to secondarily determine that the spatial stability of the solenoid valve does not meet the requirements when the vibration intensity of the pressure reducing valve body is greater than a preset vibration intensity, and to increase the valve opening of the pressure reducing valve body.

[0026] Furthermore, the increase range of the valve opening of the pressure reducing valve body is determined by the difference between the vibration intensity of the pressure reducing valve body and a preset vibration intensity.

[0027] Compared with the prior art, the beneficial effect of the present invention lies in that the intelligent pressure reducing valve of the present invention adjusts the opening speed of the pressure reducing valve body according to the variance of the fluid flow rate output by the pressure reducing valve body by setting an execution module, a detection module and a control module. The pressure in the pressure reducing valve is unbalanced during the control process due to the wear of the sealing ring of the pressure reducing valve, thereby causing the stability of the control system to decrease. By increasing the opening speed of the pressure reducing valve, the excess fluid can be released more quickly under the condition of pressure imbalance, thereby reducing the influence of the pressure imbalance caused by the wear of the sealing ring of the pressure reducing valve. By adjusting the cutoff frequency of the filter according to the average response time of the solenoid valve, the insulation performance is reduced due to the aging of the insulating material of the solenoid valve, resulting in the resistance of the solenoid valve. The interference ability is reduced, which leads to inaccurate control signals when interfered, resulting in a decrease in the sensitivity of the solenoid valve. By reducing the cut-off frequency of the filter, high-frequency interference signals are filtered out, thereby improving the influence of interference signals on the control of the solenoid valve. By adjusting the valve opening of the pressure reducing valve according to the vibration intensity of the pressure reducing valve body, since there may be impurities in the fluid, some areas of the pipeline may be blocked for a long time, resulting in a sudden increase in flow when passing through the blocked area, causing the pressure reducing valve to vibrate greatly, thereby affecting the normal operation of the solenoid valve and causing a decrease in sensitivity. By increasing the valve opening of the pressure reducing valve, the influence of excessive vibration of the pressure reducing valve caused by the sudden increase in fluid flow is reduced, thereby achieving an improvement in the operating stability of the pressure reducing valve.

[0028] Furthermore, the pressure reducing valve described in the present invention adjusts the opening speed of the pressure reducing valve body by setting a preset first variance and a preset second variance. Due to the wear of the sealing ring of the pressure reducing valve, the pressure in the pressure reducing valve is unbalanced during the control process, which leads to a decrease in the stability of the control system. By increasing the opening speed of the pressure reducing valve, excess fluid can be released more quickly under the condition of pressure imbalance, reducing the impact of the pressure imbalance caused by the wear of the sealing ring of the pressure reducing valve, and further achieving the improvement of the operating stability of the pressure reducing valve.

[0029] Furthermore, the pressure reducing valve described in the present invention adjusts the cutoff frequency of the filter by setting a preset first response time and a preset second response time. Due to the aging of the insulating material of the solenoid valve, the insulation performance is reduced, resulting in a reduction in the anti-interference ability of the solenoid valve, which in turn leads to inaccurate control signals when interfered, thereby causing the sensitivity of the solenoid valve to decrease. By reducing the cutoff frequency of the filter, high-frequency interference signals are filtered out, thereby improving the influence of interference signals on the control of the solenoid valve, and further achieving the improvement of the operating stability of the pressure reducing valve.

[0030] Furthermore, the pressure reducing valve described in the present invention adjusts the valve opening of the pressure reducing valve body by setting a preset vibration intensity. Since there may be impurities in the fluid, part of the pipeline may be blocked for a long time, resulting in a sudden increase in flow when passing through the blocked area, which causes the pressure reducing valve to vibrate greatly, thereby affecting the normal operation of the solenoid valve and causing a decrease in sensitivity. By increasing the valve opening of the pressure reducing valve, the impact of excessive vibration of the pressure reducing valve caused by the sudden increase in fluid flow is reduced, thereby further achieving an improvement in the operating stability of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an intelligent pressure reducing valve based on fluid pressure self-regulation according to an embodiment of the present invention;

[0032] Figure 2 The overall structural block diagram of the intelligent pressure reducing valve based on fluid pressure self-regulation according to an embodiment of the present invention;

[0033] Figure 3 It is a specific structural block diagram of an execution module of an intelligent pressure reducing valve based on fluid pressure self-regulation according to an embodiment of the present invention;

[0034] Figure 4 It is a specific structural block diagram of a detection module of an intelligent pressure reducing valve based on fluid pressure self-regulation according to an embodiment of the present invention;

[0035] The figure numbers are as follows: 1-input pipeline, 2-vibration sensor, 3-pressure reducing valve body, 4-valve core, 5-output pipeline, 6-flow sensor, 7-pressure sensor, 8-solenoid valve, 9-guide rod, 10-filter. DETAILED DESCRIPTION

[0036] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0038] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively an overall structural schematic diagram, an overall structural block diagram, a specific structural block diagram of an execution module, and a specific structural block diagram of a detection module of an intelligent pressure reducing valve based on fluid pressure self-regulation according to an embodiment of the present invention. An intelligent pressure reducing valve based on fluid pressure self-regulation according to the present invention comprises:

[0041] Pressure reducing valve body 3;

[0042] An execution module, used for changing the pressure of the fluid according to the monitoring signal, comprising an execution unit for adjusting the pressure of the fluid, a delivery unit connected to the execution unit for delivering the fluid, and a filter 10 arranged above the execution unit for filtering the monitoring signal, wherein the execution unit comprises a solenoid valve 8 for controlling the output pressure of the fluid;

[0043] A detection module connected to the execution module for collecting characteristic parameters of the pressure reducing valve, wherein the characteristic parameters of the pressure reducing valve include the fluid flow rate output by the pressure reducing valve body 3, the pressure of the fluid inside the pressure reducing valve, and the vibration intensity of the pressure reducing valve body 3;

[0044] A control module, which is connected to the execution module and the detection module respectively, and is used to adjust the opening speed of the pressure reducing valve body 3 or preliminarily determine that the sensitivity of the solenoid valve 8 does not meet the requirements when it is determined that the operating stability of the pressure reducing valve does not meet the requirements according to the variance of the fluid flow output by the pressure reducing valve body 3, and to secondarily determine whether the sensitivity of the solenoid valve 8 meets the requirements according to the average response time of the solenoid valve 8;

[0045] Furthermore, when the secondary determination sensitivity does not meet the requirement, the cutoff frequency of the filter 10 is adjusted or the valve opening of the pressure reducing valve is adjusted according to the vibration intensity of the pressure reducing valve body 3 .

[0046] Specifically, the filter 10 is a low-pass filter, which is used to filter the monitoring signal of the pressure sensor 7 to prevent interference.

[0047] Specifically, the execution unit also includes:

[0048] A guide rod 9 connected to the solenoid valve 8 for transmitting moving power;

[0049] The valve core 4 is connected to the guide rod 9 and adjusts the valve opening by changing its vertical position.

[0050] Specifically, the response time of the solenoid valve 8 refers to the time interval from when the solenoid valve 8 receives a control signal to when the solenoid valve 8 completes a corresponding action.

[0051] In implementation, the intelligent pressure reducing valve of the present invention is provided with an execution module, a detection module and a control module, and the opening speed of the pressure reducing valve body 3 is adjusted according to the variance of the fluid flow output by the pressure reducing valve body 3. Due to the wear of the sealing ring of the pressure reducing valve, the pressure in the pressure reducing valve is unbalanced during the control process, thereby causing the stability of the control system to decrease. By increasing the opening speed of the pressure reducing valve, the excess fluid can be released more quickly under the condition of pressure imbalance, thereby reducing the impact of the pressure imbalance caused by the wear of the sealing ring of the pressure reducing valve. By adjusting the cutoff frequency of the filter 10 according to the average response time of the solenoid valve 8, the insulation performance is reduced due to the aging of the insulating material of the solenoid valve 8, resulting in a decrease in the anti-interference ability of the solenoid valve 8. , which leads to inaccurate control signals when disturbed, resulting in a decrease in the sensitivity of the solenoid valve 8. By reducing the cutoff frequency of the filter 10, the high-frequency interference signal is filtered out, thereby improving the influence of the interference signal on the control of the solenoid valve 8. By adjusting the valve opening of the pressure reducing valve according to the vibration intensity of the pressure reducing valve body 3, since there may be impurities in the fluid, part of the pipeline may be blocked for a long time, resulting in a sudden increase in flow when passing through the blocked area, causing the pressure reducing valve to vibrate greatly, thereby affecting the normal operation of the solenoid valve 8 and causing a decrease in sensitivity. By increasing the valve opening of the pressure reducing valve, the influence of excessive vibration of the pressure reducing valve caused by the sudden increase in fluid flow is reduced, thereby achieving an improvement in the operating stability of the pressure reducing valve.

[0052] Specifically, the conveying unit comprises:

[0053] An input pipeline 1, which is connected to the pressure reducing valve body 3 and is used to transport fluid into the pressure reducing valve body 3;

[0054] The output pipe 5 is connected to the pressure reducing valve body 3 and is used for outputting the fluid in the pressure reducing valve body 3 .

[0055] Specifically, the detection module includes:

[0056] A pressure sensor 7, which is arranged inside the pressure reducing valve body 3 and is used to detect the pressure of the fluid;

[0057] A flow sensor connected to the output pipe 5 to detect the flow of the output fluid;

[0058] The vibration sensor 2 is connected to the pressure reducing valve body 3 and is used to detect the vibration intensity of the pressure reducing valve body 3 .

[0059] Specifically, the control module is connected to the flow sensor to calculate the variance of the fluid flow output by the pressure reducing valve body 3 according to the flow of the output fluid in a number of cycles, and to determine that the operating stability of the pressure reducing valve does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body 3 satisfies the first variance condition or the second variance condition;

[0060] The control module is connected to the solenoid valve 8, and is used to preliminarily determine that the sensitivity of the solenoid valve 8 does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body 3 only satisfies the first variance condition, and to perform a secondary determination on whether the sensitivity of the solenoid valve 8 meets the requirements according to the average response time of the solenoid valve 8;

[0061] Among them, the first variance condition is that the variance of the fluid flow output by the pressure reducing valve body 3 is greater than the preset first variance and less than or equal to the preset second variance; the second variance condition is that the variance of the fluid flow output by the pressure reducing valve body 3 is greater than the preset second variance.

[0062] It can be understood that the three intervals corresponding to the preset first variance and the preset second variance correspond to three situations respectively. The first situation is that the variance of the fluid flow output by the pressure reducing valve body 3 is less than or equal to the preset first variance, and it is determined that the operating stability of the pressure reducing valve meets the requirements; the second situation is that the variance of the fluid flow output by the pressure reducing valve body 3 is greater than the preset first variance and less than or equal to the preset second variance, and it is preliminarily determined that the sensitivity of the solenoid valve 8 does not meet the requirements, and a secondary judgment is made on whether the sensitivity of the solenoid valve 8 meets the requirements based on the average response time of the solenoid valve 8; the third situation is that the variance of the fluid flow output by the pressure reducing valve body 3 is greater than the preset second variance, and the opening speed of the pressure reducing valve is increased.

[0063] Preferably, the first variance Q1 is preset to be 2 (L / min) 2 , preset second variance Q2 = 3 (L / min) 2 .

[0064] Specifically, the variance of the fluid flow rate output by the pressure reducing valve body 3 is denoted as Q.

[0065] Specifically, the variance of the fluid flow output by the pressure reducing valve body 3 is the variance of the fluid flow output by the pressure reducing valve body 3 within several cycles. The calculation method of the variance of the fluid flow output by the pressure reducing valve body 3 is a conventional technical means well known to those skilled in the art. Therefore, the calculation process of the variance of the fluid flow output by the pressure reducing valve body 3 will not be repeated here.

[0066] In implementation, the pressure reducing valve of the present invention determines the operating stability of the pressure reducing valve by setting a preset first variance and a preset second variance, thereby reducing the impact of the reduced operating accuracy of the pressure reducing valve due to inaccurate judgment of the operating stability of the pressure reducing valve, and further improving the operating stability of the pressure reducing valve.

[0067] Specifically, the control module is connected to the pressure reducing valve body 3, and is used to increase the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body 3 only satisfies the second variance condition;

[0068] The increase range of the opening speed of the pressure reducing valve is determined by the difference between the variance of the fluid flow output by the pressure reducing valve body 3 and a preset second variance.

[0069] Specifically, the calculation formula for the increased opening speed of the pressure reducing valve is:

[0070]

[0071] Among them, V' is the increased opening speed of the pressure reducing valve, V is the current opening speed of the pressure reducing valve, A is the minimum unit variance for adjusting the opening speed of the pressure reducing valve, and v is the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body 3 is the minimum unit variance.

[0072] In practice, the value of A is generally 3 (L / min) 2 ~5(L / min) 2 , preferably, the preferred embodiment of A is 4 (L / min) 2 .

[0073] In practice, the optional range of the value of v is 8 mm / s to 15 mm / s. Preferably, considering that when the opening speed of the pressure reducing valve is less than 10 mm / s, the pressure inside the pressure reducing valve may increase, the preferred embodiment of v is 10 mm / s.

[0074] In implementation, the pressure reducing valve of the present invention adjusts the opening speed of the pressure reducing valve body 3 by setting a preset first variance and a preset second variance. Due to the wear of the sealing ring of the pressure reducing valve, the pressure in the pressure reducing valve is unbalanced during the control process, which leads to a decrease in the stability of the control system. By increasing the opening speed of the pressure reducing valve, excess fluid can be released more quickly under the condition of pressure imbalance, reducing the impact of the pressure imbalance caused by the wear of the sealing ring of the pressure reducing valve, and further achieving the improvement of the operating stability of the pressure reducing valve.

[0075] Specifically, the control module is connected to the solenoid valve 8, and is used to make a secondary determination that the sensitivity of the solenoid valve 8 does not meet the requirements when the average response time of the solenoid valve 8 meets the first response time condition or the second response time condition, and to make a preliminary determination that the spatial stability of the solenoid valve 8 does not meet the requirements when the average response time of the solenoid valve 8 only meets the second response time condition, and to make a secondary determination on whether the spatial stability of the solenoid valve 8 meets the requirements according to the vibration intensity of the pressure reducing valve body 3;

[0076] The control module is connected to the filter 10, and is used to reduce the cutoff frequency of the filter 10 when the average response time of the solenoid valve 8 only meets the first response time condition;

[0077] Among them, the first response time condition is that the average response time of the solenoid valve 8 is greater than the preset first response time and less than or equal to the preset second response time; the second response time condition is that the average response time of the solenoid valve 8 is greater than the preset second response time.

[0078] It can be understood that the three intervals corresponding to the preset first response time and the preset second response time correspond to three situations respectively. The first situation is that the average response time of the solenoid valve 8 is less than or equal to the preset first response time, and a secondary judgment is made that the sensitivity of the solenoid valve 8 meets the requirements; the second situation is that the average response time of the solenoid valve 8 is greater than the preset first response time and is less than or equal to the preset second response time, and the cutoff frequency of the filter 10 is reduced; the third situation is that the average response time of the solenoid valve 8 is greater than the preset second response time, and a preliminary judgment is made that the spatial stability of the solenoid valve 8 does not meet the requirements, and a secondary judgment is made on whether the spatial stability of the solenoid valve 8 meets the requirements based on the vibration intensity of the pressure reducing valve body 3.

[0079] Preferably, the first response time length P1 is preset to be 30 ms, and the second response time length P2 is preset to be 40 ms.

[0080] Specifically, the average response time of the solenoid valve 8 is denoted as P.

[0081] In implementation, the pressure reducing valve of the present invention performs a secondary judgment on the sensitivity of the solenoid valve 8 by setting a preset first response time and a preset second response time, thereby reducing the impact of the reduced operating stability of the pressure reducing valve due to inaccurate secondary judgment of the sensitivity of the solenoid valve 8, and further improving the operating stability of the pressure reducing valve.

[0082] Specifically, the calculation formula for the average response time of the solenoid valve 8 is:

[0083]

[0084] Among them, Z is the average response time of the solenoid valve 8, Xa is the response time of the solenoid valve 8 in the ath control cycle, n is the number of control cycles, and n is a natural number greater than or equal to 1.

[0085] Specifically, the reduction range of the cut-off frequency of the filter 10 is determined by the difference between the average response time of the solenoid valve 8 and the preset first response time.

[0086] Specifically, the calculation formula of the reduced cutoff frequency of the filter 10 is:

[0087]

[0088] Among them, H' is the reduced cutoff frequency of the filter 10, H is the current cutoff frequency of the filter 10, B is the minimum unit response time for adjusting the cutoff frequency of the filter 10, and h is the cutoff frequency of the filter 10 when the average response time of the solenoid valve 8 is the minimum unit response time.

[0089] In practice, the value of B is generally 40 ms to 60 ms. Preferably, the preferred embodiment of B is 50 ms.

[0090] In implementation, the optional range of h is 50 Hz to 70 Hz. Preferably, considering that when the cutoff frequency of the filter 10 is greater than 60 Hz, the signal may be interfered, the preferred embodiment of h is 60 Hz.

[0091] In implementation, the pressure reducing valve of the present invention adjusts the cutoff frequency of the filter 10 by setting a preset first response time and a preset second response time. Due to the aging of the insulating material of the solenoid valve 8, the insulation performance is reduced, resulting in a reduction in the anti-interference ability of the solenoid valve 8, which in turn leads to inaccurate control signals when interfered, thereby causing the sensitivity of the solenoid valve 8 to decrease. By reducing the cutoff frequency of the filter 10, high-frequency interference signals are filtered out, thereby improving the influence of interference signals on the control of the solenoid valve 8, and further achieving the improvement of the operating stability of the pressure reducing valve.

[0092] Specifically, the control module is connected to the vibration sensor 2 to secondarily determine that the spatial stability of the solenoid valve 8 does not meet the requirements when the vibration intensity of the pressure reducing valve body 3 is greater than the preset vibration intensity, and increase the valve opening of the pressure reducing valve body 3.

[0093] It can be understood that the two intervals corresponding to the preset vibration intensity correspond to two situations respectively. The first situation is that the vibration intensity of the pressure reducing valve body 3 is less than or equal to the preset vibration intensity, and the secondary judgment is that the spatial stability of the solenoid valve 8 meets the requirements; the second situation is that the vibration intensity of the pressure reducing valve body 3 is greater than the preset vibration intensity, and the valve opening of the pressure reducing valve body 3 is increased.

[0094] Preferably, the preset vibration intensity Y0=10 mm.

[0095] Specifically, the vibration intensity of the pressure reducing valve body 3 is denoted by Y.

[0096] In implementation, the pressure reducing valve of the present invention performs a secondary judgment on the spatial stability of the solenoid valve 8 by setting a preset vibration intensity, thereby reducing the impact of the reduced operating stability of the pressure reducing valve due to inaccurate secondary judgment on the spatial stability of the solenoid valve 8, and further improving the operating stability of the pressure reducing valve.

[0097] Specifically, the increase range of the valve opening of the pressure reducing valve body 3 is determined by the difference between the vibration intensity of the pressure reducing valve body 3 and the preset vibration intensity.

[0098] Specifically, the calculation formula of the valve opening of the enlarged pressure reducing valve body 3 is:

[0099]

[0100] Among them, L' is the increased valve opening of the pressure reducing valve body 3, L is the current valve opening of the pressure reducing valve body 3, C is the minimum unit vibration intensity for adjusting the valve opening of the pressure reducing valve body 3, and l is the valve opening of the pressure reducing valve body 3 when the vibration intensity of the pressure reducing valve body 3 is the minimum unit vibration intensity.

[0101] In practice, the value of C is generally 13 mm to 17 mm. Preferably, the preferred embodiment of C is 15 mm.

[0102] In practice, the optional range of l is 40° to 60°. Preferably, considering that when the valve opening of the pressure reducing valve body 3 is less than 50°, the vibration intensity of the pressure reducing valve may be too large, the preferred embodiment of l is 50°.

[0103] In practice, the pressure reducing valve of the present invention adjusts the valve opening of the pressure reducing valve body 3 by setting a preset vibration intensity. Since there may be impurities in the fluid, some areas of the pipeline may be blocked for a long time, resulting in a sudden increase in flow when passing through the blocked area, which causes the pressure reducing valve to vibrate greatly, thereby affecting the normal operation of the solenoid valve 8 and causing a decrease in sensitivity. By increasing the valve opening of the pressure reducing valve, the impact of excessive vibration of the pressure reducing valve caused by the sudden increase in fluid flow is reduced, thereby further achieving the improvement of the operating stability of the pressure reducing valve.

[0104] Example 1

[0105] In this embodiment 1, an intelligent pressure reducing valve based on fluid pressure self-regulation is used to transport the fluid in the pipeline. The control module adjusts the opening speed of the pressure reducing valve according to the difference between the variance of the fluid flow output by the pressure reducing valve body and the preset second variance, wherein the minimum unit variance for adjusting the opening speed of the pressure reducing valve is recorded as A, and the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body is the minimum unit variance is recorded as v, wherein A=4 (L / min) 2 , v=10mm / s, V=15mm / s, Q=5(L / min) 2 , Q2=3(L / min) 2 .

[0106] Calculated

[0107] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An intelligent pressure reducing valve based on fluid pressure self-regulation, characterized in that: include: Pressure reducing valve body; an execution module, for changing the pressure of the fluid according to the monitoring signal, comprising an execution unit for adjusting the pressure of the fluid, a delivery unit connected to the execution unit for delivering the fluid, and a filter arranged above the execution unit for filtering the monitoring signal, wherein the execution unit comprises a solenoid valve for controlling the output pressure of the fluid; A detection module connected to the execution module for collecting characteristic parameters of the pressure reducing valve, wherein the characteristic parameters of the pressure reducing valve include the fluid flow rate output by the pressure reducing valve body, the pressure of the fluid inside the pressure reducing valve, and the vibration intensity of the pressure reducing valve body; a control module, which is connected to the execution module and the detection module respectively, and is used to adjust the opening speed of the pressure reducing valve body or preliminarily determine that the sensitivity of the solenoid valve does not meet the requirements when it is determined that the operating stability of the pressure reducing valve does not meet the requirements according to the variance of the fluid flow output by the pressure reducing valve body, and to secondarily determine whether the sensitivity of the solenoid valve meets the requirements according to the average response time of the solenoid valve; And, when the secondary determination sensitivity does not meet the requirement, adjusting the cutoff frequency of the filter or adjusting the valve opening of the pressure reducing valve according to the vibration intensity of the pressure reducing valve body; The calculation formula for the increased opening speed of the pressure reducing valve is: Wherein, V' is the increased opening speed of the pressure reducing valve, V is the current opening speed of the pressure reducing valve, A is the minimum unit variance for adjusting the opening speed of the pressure reducing valve, and v is the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body is the minimum unit variance; Preset second variance Q2 = 3 (L / min) 2 , the variance of the fluid flow rate output by the pressure reducing valve body is recorded as Q; The value of A is 3 (L / min) 2 ~5(L / min) 2 ; The value of v is 8mm / s~15mm / s; The calculation formula for the cutoff frequency of the reduced filter is: Wherein, H' is the cutoff frequency of the reduced filter, H is the current cutoff frequency of the filter, B is the minimum unit response time for adjusting the cutoff frequency of the filter, and h is the cutoff frequency of the filter when the average response time of the solenoid valve is the minimum unit response time; The first response time P1 is preset to be 30 ms, and the average response time of the solenoid valve is recorded as P; The value of B is 40ms to 60ms; The value of h is 50Hz~70Hz; The calculation formula for the valve opening of the enlarged pressure reducing valve body is: Wherein, L' is the valve opening of the pressure reducing valve body after the increase, L is the current valve opening of the pressure reducing valve body, C is the minimum unit vibration intensity for adjusting the valve opening of the pressure reducing valve body, and l is the valve opening of the pressure reducing valve body when the vibration intensity of the pressure reducing valve body is the minimum unit vibration intensity; The preset vibration intensity Y0=10mm, the vibration intensity of the pressure reducing valve body is recorded as Y; The value of C is 13mm~17mm; The value of l is 40°~60°.

2. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 1, characterized in that: The conveying unit comprises: An input pipeline connected to the pressure reducing valve body and used for conveying fluid into the pressure reducing valve body; An output pipeline is connected to the pressure reducing valve body and is used for outputting the fluid in the pressure reducing valve body.

3. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 2, characterized in that: The detection module comprises: A pressure sensor, which is arranged inside the pressure reducing valve body and is used to detect the pressure of the fluid; A flow sensor connected to the output pipeline to detect the flow of the output fluid; A vibration sensor is connected to the pressure reducing valve body and is used to detect the vibration intensity of the pressure reducing valve body.

4. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 3, characterized in that: The control module is connected to the flow sensor, and is used to calculate the variance of the fluid flow output by the pressure reducing valve body according to the flow of the output fluid in a number of cycles, and to determine that the operating stability of the pressure reducing valve does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body meets the first variance condition or the second variance condition; The control module is connected to the solenoid valve, and is used to preliminarily determine that the sensitivity of the solenoid valve does not meet the requirements when the variance of the fluid flow output by the pressure reducing valve body only satisfies the first variance condition, and to perform a secondary determination on whether the sensitivity of the solenoid valve meets the requirements according to the average response time of the solenoid valve; The first variance condition is that the variance of the fluid flow output by the pressure reducing valve body is greater than the preset first variance and less than or equal to the preset second variance; the second variance condition is that the variance of the fluid flow output by the pressure reducing valve body is greater than the preset second variance.

5. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 4, characterized in that: The control module is connected to the pressure reducing valve body, and is used to increase the opening speed of the pressure reducing valve when the variance of the fluid flow output by the pressure reducing valve body only satisfies the second variance condition; The increase range of the opening speed of the pressure reducing valve is determined by the difference between the variance of the fluid flow output by the pressure reducing valve body and a preset second variance.

6. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 5, characterized in that: The control module is connected to the solenoid valve, and is used to make a secondary determination that the sensitivity of the solenoid valve does not meet the requirement when the average response time of the solenoid valve meets the first response time condition or the second response time condition, and to make a preliminary determination that the spatial stability of the solenoid valve does not meet the requirement when the average response time of the solenoid valve only meets the second response time condition, and to make a secondary determination on whether the spatial stability of the solenoid valve meets the requirement according to the vibration intensity of the pressure reducing valve body; The control module is connected to the filter, and is used to reduce the cutoff frequency of the filter when the average response time of the solenoid valve only meets the first response time condition; Among them, the first response time condition is that the average response time of the solenoid valve is greater than the preset first response time and less than or equal to the preset second response time; the second response time condition is that the average response time of the solenoid valve is greater than the preset second response time.

7. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 6, characterized in that: The calculation formula for the average response time of the solenoid valve is: Among them, Z is the average response time of the solenoid valve, X a is the response time of the solenoid valve in the ath control cycle, n is the number of control cycles, and n is a natural number greater than or equal to 1.

8. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 7, characterized in that: The reduction range of the cut-off frequency of the filter is determined by the difference between the average response time of the solenoid valve and the preset first response time.

9. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 8, characterized in that: The control module is connected to the vibration sensor and is used to secondarily determine that the spatial stability of the solenoid valve does not meet the requirements when the vibration intensity of the pressure reducing valve body is greater than the preset vibration intensity, and to increase the valve opening of the pressure reducing valve body.

10. The intelligent pressure reducing valve based on fluid pressure self-regulation according to claim 9, characterized in that: The increase range of the valve opening of the pressure reducing valve body is determined by the difference between the vibration intensity of the pressure reducing valve body and the preset vibration intensity.

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