Overflow valve flow adjusting system and method

Abstract

The invention relates to the technical field of overflow valves, and provides an overflow valve flow adjusting system and method.The overflow valve flow adjusting system comprises a first control device, a first collecting module, an overflow valve control parameter adjusting module, a storage module, an obtaining module, a screening module, a first early warning module, a first determining module and a third early warning module. The problems that in the prior art, a device / system for intelligently adjusting the flow of the overflow valve lacks, the flow of the overflow valve cannot be intelligently adjusted according to the state of a system composed of the overflow valve and a conveying pump, and the use reliability is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of overflow valves, and in particular to an overflow valve flow regulating system and method. Background Art

[0002] A relief valve is a fluid control device that controls the flow or pressure in a fluid system to maintain the normal working state of the system. The hydraulic loading system of a coal mill usually uses a relief valve, including a proportional relief valve.

[0003] In the prior art, there is a lack of a device / system for intelligently adjusting the flow of the overflow valve, and it is impossible to intelligently adjust the flow of the overflow valve according to the state of the system composed of the overflow valve and the delivery pump, which affects the reliability of use. Summary of the invention

[0004] The present invention provides a flow regulation system and method for an overflow valve, which are used to solve the technical problems raised by the above-mentioned background technology.

[0005] In order to solve the above problems, the present invention discloses a flow regulation system of a relief valve, comprising:

[0006] A first collection module, used for collecting parameters of the fluid at the outlet of the relief valve;

[0007] A relief valve control parameter adjustment module, used to adjust the actual control parameters of the relief valve;

[0008] A storage module stores a relief valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the relief valve delivers the target fluid; the target fluid is a fluid that can be delivered through the relief valve; in the relief valve control parameter-theoretical flow curve, the abscissa is the relief valve control parameter, and the ordinate is the fluid flow at the relief valve outlet;

[0009] An acquisition module, used to acquire a target flow rate of the fluid at the current overflow valve outlet and a target working time corresponding to the target flow rate;

[0010] A screening module, for screening a first relief valve control parameter corresponding to a target flow rate of the fluid at the current relief valve outlet based on a relief valve control parameter-theoretical flow rate curve of a delivery pump under a reference control parameter when delivering the current delivery fluid;

[0011] A first warning module, if the delivery pump is in the state of delivering the current delivery fluid and the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve is less than or equal to the target flow rate, a warning is issued;

[0012] The first control device, when the first early warning module does not give an early warning, first controls the overflow valve control parameter adjustment module to work, adjusts the actual control parameter of the overflow valve to the first overflow valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continuously works for a first set time, and controls the first acquisition module to work several times within the first set time;

[0013] The first determination module is used to calculate the first target overflow valve control parameter based on the detection value of the first acquisition module; when the first target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the first set time, the first control device controls the overflow valve control parameter adjustment module to work, and adjusts the actual control parameter of the overflow valve to the first target overflow valve control parameter, and at the same time controls the actual working parameter of the delivery pump to work as the benchmark control parameter for the target working time.

[0014] Preferably, it also includes:

[0015] The third early warning module is used to issue an early warning when the first target overflow valve control parameter is greater than the control parameter of the overflow valve when the overflow valve is fully open.

[0016] Preferably, the reference control parameter is a rated control parameter of the delivery pump.

[0017] Preferably, the first determination module calculates the first target relief valve control parameter based on the following formula:

[0018]

[0019] V1 is the first target valve opening; V0 is the valve opening corresponding to the first overflow valve control parameter; Q is the average value of the flow rate of the fluid detected by the first acquisition module within the first set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; M is the number of detections by the first acquisition module within the first set time; Q i Q is the i-th detection value of the first acquisition module within the first set time period; i-1 It is the i-1th detection value of the first acquisition module within the first set time length; the first target overflow valve control parameter is the overflow valve control parameter corresponding to the first target valve opening obtained based on the preset overflow valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the overflow valve; D0 is the unit diameter; W1 is the first parameter of the opening related to the flow.

[0020] Preferably, the storage module also stores the theoretical fluid parameters of the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the overflow valve delivers the target fluid; the overflow valve flow regulation system also includes:

[0021] A second calculation module is used to calculate the control parameter of the first delivery pump based on the target flow rate of the fluid at the current overflow valve outlet and the overflow valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter when delivering the current delivery fluid when the first warning module issues an alarm;

[0022] A second early warning module, used for issuing a second early warning when the control parameter of the first delivery pump is greater than the maximum allowable control parameter of the delivery pump;

[0023] The delivery pump control parameter adjustment module is used to adjust the delivery pump control parameters. The first control device controls the delivery pump control parameter adjustment module to work.

[0024] Preferably, the first delivery pump control parameter is calculated based on the following formula:

[0025]

[0026] P1 is the base control parameter of the delivery pump; P2 is the control parameter of the first delivery pump; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the base control parameter when delivering the current delivery fluid; h is the head of the delivery pump, γ is the working efficiency of the delivery pump; ρ is the density of the current delivery fluid; q j0 It is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the benchmark control parameters when delivering the current delivery fluid (the overall state of the corresponding overflow valve and the delivery pump is the initial state); g is the acceleration of gravity; π is taken as 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve.

[0027] Preferably, it also includes:

[0028] A first calculation module, used for calculating a second relief valve control parameter;

[0029] When the second early warning module does not issue an early warning, the first control device controls the delivery pump control parameter adjustment module to work, so that the actual control parameter of the delivery pump is the first delivery pump control parameter; at the same time, the first control device controls the relief valve control parameter adjustment module to work, adjusts the actual control parameter of the relief valve to the second relief valve control parameter, and continues to work for a second set time; and controls the first acquisition module to work several times within the second set time;

[0030] The second determination module is used to calculate the second target overflow valve control parameter based on the detection value of the first acquisition module; when the second target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the second set time, the first control device controls the overflow valve control parameter adjustment module to work, and adjusts the actual control parameter of the overflow valve to the second target overflow valve control parameter, and at the same time controls the actual working parameter of the delivery pump to be the first delivery pump control parameter working for the target working time.

[0031] Preferably, the first calculation module calculates the second relief valve control parameter based on the following formula:

[0032]

[0033] V2 is the control parameter of the second relief valve, V max is the overflow valve control parameter when the overflow valve is fully open; D is the nominal diameter of the overflow valve; D0 is the unit diameter; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when delivering the current delivery fluid; ρ is the density of the current delivery fluid; q j0 is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameters when delivering the current delivery fluid; g is the acceleration of gravity; π is 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve; P2 is the control parameter of the first delivery pump; h is the head of the delivery pump;

[0034] The second determination module calculates the second target relief valve control parameter based on the following formula:

[0035]

[0036] V2 is the second target valve opening; V 10 is the valve opening corresponding to the control parameter of the second relief valve; Q 11 is the average value of the flow rate of the fluid detected by the first acquisition module within the second set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; N is the number of detections by the first acquisition module within the second set time; B s B is the sth detection value of the first acquisition module within the second set time period; s-1 is the i-1th detection value of the first acquisition module within the second set time; the second target relief valve control parameter is the relief valve control parameter corresponding to the target valve opening obtained based on the preset relief valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the relief valve; D0 is the unit diameter; W 10 It is the second parameter related to the opening and flow rate.

[0037] The present invention also discloses a method for regulating flow of a relief valve, comprising:

[0038] Step S1: The target flow rate of the fluid at the current overflow valve outlet and the target working time corresponding to the target flow rate are selected based on the overflow valve control parameter-theoretical flow rate curve of the delivery pump under the reference control parameter when delivering the current delivery fluid, and the first overflow valve control parameter corresponding to the target flow rate of the fluid at the current overflow valve outlet is selected; if the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve of the delivery pump under the reference control parameter when delivering the current delivery fluid is less than or equal to the target flow rate, the first warning module issues a warning;

[0039] Step S2: When the first early warning module does not issue an early warning, the first control device first controls the overflow valve control parameter adjustment module to operate, adjusts the actual control parameter of the overflow valve to the first overflow valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continuously operates for a first set time, and controls the first acquisition module to operate several times within the first set time;

[0040] Step S3: The first determination module is used to calculate the first target overflow valve control parameter based on the detection value of the first acquisition module; when the first target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the first set time, the first control device controls the overflow valve control parameter adjustment module to work, and adjusts the actual control parameter of the overflow valve to the first target overflow valve control parameter, and at the same time controls the actual working parameter of the delivery pump to work as the benchmark control parameter for the target working time.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] Before the relief valve officially works for a long time, the present invention first obtains the relief valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the relief valve delivers the target fluid, and stores it in a memory, so as to provide a basis for subsequent flow regulation of the relief valve.

[0043] The present invention first obtains the overflow valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter when delivering the current delivery fluid and the target flow of the fluid at the current overflow valve outlet each time the flow of the overflow valve is adjusted, and then screens out the first overflow valve control parameter based on the screening module. The first overflow valve control parameter can be quickly and preliminarily determined in the above manner;

[0044] If the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve under the reference control parameter of the delivery pump when delivering the current delivery fluid is less than the target flow rate, the first early warning module issues an early warning to remind the user to adjust the actual control parameters of the pump to increase the flow rate of the pump (such as increasing the speed of the motor of the pump);

[0045] When the first warning module does not issue a warning, the first control device first controls the relief valve control parameter adjustment module to work, adjusts the actual control parameter of the relief valve to the first relief valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continues to work for the first set time, and controls the first acquisition module to work several times within the first set time, so as to test and determine the flow state (Q, Q) of the fluid at the actual relief valve outlet in the current state (the overall state of the current relief valve and the delivery pump. As the use time increases, the overall state of the current relief valve and the delivery pump may be different from the initial state. When delivering the current delivery fluid, the relief valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter corresponds to the initial overall state of the current relief valve and the delivery pump). i , Q i-1 ), and then determine the first target valve opening based on the flow state of the fluid at the actual overflow valve outlet in the current state, thereby determining the first target overflow valve control parameters, ensuring that the appropriate first target overflow valve control parameters are finally determined, and ensuring reliable regulation of the flow at the stack overflow valve outlet.

[0046] The present invention solves the following problems raised by the background technology: In the prior art, there is a lack of a device / system for intelligently adjusting the flow of the overflow valve, and it is impossible to intelligently adjust the flow of the overflow valve according to the state of the system composed of the overflow valve and the delivery pump, which affects the reliability of use.

[0047] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0049] Figure 1 It is a schematic diagram of the structure of the system of the present invention. DETAILED DESCRIPTION

[0050] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0051] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0053] The present invention provides the following embodiments

[0054] Embodiment 1, the embodiment of the present invention provides a relief valve flow control system, such as Figure 1 As shown, including:

[0055] A first collection module, used for collecting parameters of the fluid at the outlet of the relief valve;

[0056] A relief valve control parameter adjustment module, used to adjust the actual control parameters of the relief valve;

[0057] The storage module stores a relief valve control parameter-theoretical flow curve when the delivery pump is under a reference control parameter (which may be a rated working parameter of the delivery pump) when the relief valve delivers the target fluid; the target fluid is a fluid that can be delivered through the relief valve; in the relief valve control parameter-theoretical flow curve, the abscissa is the relief valve control parameter, and the ordinate is the fluid flow at the relief valve outlet; the relief valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the relief valve delivers the target fluid can be obtained in the following manner: in a system consisting of a relief valve and a delivery pump in an initial state, the delivery pump is controlled to The overflow valve works at the reference control parameter, and the overflow valve is controlled to work at different overflow valve control parameters for a third set time. The first acquisition module performs several detections within the third set time, and the overflow valve control parameter is used as the horizontal coordinate, and the detection value of the first acquisition module within the third set time is used as the vertical coordinate to construct the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter (which can be the rated working parameter of the delivery pump) when the overflow valve delivers the target fluid; the flow rate of the outlet of the delivery pump is also obtained within the third set time when the overflow valve works at the corresponding maximum overflow valve control parameter (corresponding to q j0 ).

[0058] An acquisition module, used to acquire a target flow rate of the fluid at the current overflow valve outlet and a target working time corresponding to the target flow rate;

[0059] A screening module, for screening a first relief valve control parameter corresponding to a target flow rate of the fluid at the current relief valve outlet based on a relief valve control parameter-theoretical flow rate curve of a delivery pump under a reference control parameter when delivering the current delivery fluid;

[0060] The first early warning module issues an early warning if the maximum flow of the overflow valve control parameter-theoretical flow curve under the benchmark control parameters when delivering the current delivered fluid is less than or equal to the target flow; in the present invention, after the first early warning module issues an early warning, the flow of the overflow valve can also be adjusted based on the existing overflow valve flow regulation method / system / device.

[0061] The first control device, when the first early warning module does not warn, the first control device first controls the overflow valve control parameter adjustment module to work, adjusts the actual control parameter of the overflow valve to the first overflow valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continuously works for a first set time (less than the theoretical working time of the target flow rate of the fluid at the current overflow valve outlet, for example, it needs to work for 1 hour at the target flow rate of the fluid at the current overflow valve outlet, and the first set time can be 20 seconds), and controls the first acquisition module to work several times within the first set time;

[0062] The first determination module is used to calculate the first target overflow valve control parameter based on the detection value of the first acquisition module; when the first target overflow valve control parameter is less than or equal to the overflow valve control parameter when the overflow valve is fully open, after the first set time, the first control device controls the overflow valve control parameter adjustment module to work, adjusts the actual control parameter of the overflow valve to the first target overflow valve control parameter, and controls the actual working parameter of the delivery pump to work as the benchmark control parameter for the target working time. The control parameter of the overflow valve can be the current or voltage of the overflow valve; the opening of the overflow valve can be increased by increasing the current of the overflow valve;

[0063] In the present invention, the inlet of the pump is connected to the source of the fluid to be transported, the outlet of the pump is connected to the inlet of the relief valve, and the outlet of the relief valve is connected to the fluid inlet of the system that needs to transport the fluid;

[0064] Among them, the first control device is electrically connected to the first acquisition module, the overflow valve control parameter adjustment module, the storage module, the acquisition module, the screening module, the first warning module, the first determination module, and the third warning module respectively.

[0065] Preferably, the reference control parameter is a rated control parameter of the delivery pump.

[0066] Optionally, a second acquisition module may be provided to acquire actual control parameters of the relief valve;

[0067] Preferably, the first determination module calculates the first target relief valve control parameter based on the following formula:

[0068]

[0069]

[0070] V1 is the first target valve opening; V0 is the valve opening corresponding to the first overflow valve control parameter; Q is the average value of the flow rate of the fluid detected by the first acquisition module within the first set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; M is the number of detections by the first acquisition module within the first set time; Q i Q is the i-th detection value of the first acquisition module within the first set time period; i-1 It is the i-1th detection value of the first acquisition module within the first set time length; the first target overflow valve control parameter is the overflow valve control parameter corresponding to the first target valve opening obtained based on the preset overflow valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the overflow valve; D0 is the unit diameter; W1 is the first parameter of the opening related to the flow.

[0071] Preferably, it also includes:

[0072] A third early warning module is used to issue an early warning when the first target overflow valve control parameter is greater than the overflow valve control parameter when the overflow valve is fully open, and to remind the user to adjust the control parameter of the delivery pump;

[0073] The beneficial effects of the above scheme are:

[0074] Before the relief valve officially works for a long time, the present invention first obtains the relief valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the relief valve delivers the target fluid, and stores it in a memory, so as to provide a basis for subsequent flow regulation of the relief valve.

[0075] The present invention first obtains the overflow valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter when delivering the current delivery fluid and the target flow of the fluid at the current overflow valve outlet each time the flow of the overflow valve is adjusted, and then screens out the first overflow valve control parameter based on the screening module. The first overflow valve control parameter can be quickly and preliminarily determined in the above manner;

[0076] If the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve under the reference control parameter of the delivery pump when delivering the current delivery fluid is less than the target flow rate, the first early warning module issues an early warning to remind the user to adjust the actual control parameters of the pump to increase the flow rate of the pump (such as increasing the speed of the motor of the pump);

[0077] When the first warning module does not issue a warning, the first control device first controls the relief valve control parameter adjustment module to work, adjusts the actual control parameter of the relief valve to the first relief valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continues to work for the first set time, and controls the first acquisition module to work several times within the first set time, so as to test and determine the flow state (Q, Q) of the fluid at the actual relief valve outlet in the current state (the overall state of the current relief valve and the delivery pump. As the use time increases, the overall state of the current relief valve and the delivery pump may be different from the initial state. When delivering the current delivery fluid, the relief valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter corresponds to the initial overall state of the current relief valve and the delivery pump). i , Q i-1 ), and then determine the first target valve opening based on the flow state of the fluid at the actual overflow valve outlet in the current state, thereby determining the first target overflow valve control parameters, ensuring that the appropriate first target overflow valve control parameters are finally determined, and ensuring reliable regulation of the flow at the stack overflow valve outlet.

[0078] The present invention solves the following problems raised by the background technology: In the prior art, there is a lack of a device / system for intelligently adjusting the flow of the overflow valve, and it is impossible to intelligently adjust the flow of the overflow valve according to the state of the system composed of the overflow valve and the delivery pump, which affects the reliability of use.

[0079] Embodiment 2, based on embodiment 1, the storage module further stores the theoretical fluid parameter of the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when the overflow valve delivers the target fluid; the overflow valve flow regulation system also includes:

[0080] A second calculation module is used to calculate the control parameter of the first delivery pump based on the target flow rate of the fluid at the current overflow valve outlet and the overflow valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter when delivering the current delivery fluid when the first warning module or the third warning module issues an alarm;

[0081] A second early warning module, used for issuing a second early warning when the control parameter of the first delivery pump is greater than the maximum allowable control parameter of the delivery pump;

[0082] The delivery pump control parameter adjustment module is used to adjust the delivery pump control parameters. The first control device controls the delivery pump control parameter adjustment module to work. The first control device is also electrically connected to the second calculation module, the second warning module, the delivery pump control parameter adjustment module, the first calculation module, and the second determination module;

[0083] Preferably, the first delivery pump control parameter is calculated based on the following formula:

[0084]

[0085] P1 is the base control parameter of the delivery pump; P2 is the control parameter of the first delivery pump; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the base control parameter when delivering the current delivery fluid; h is the head of the delivery pump, γ is the working efficiency of the delivery pump; ρ is the density of the current delivery fluid; q j0 It is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the benchmark control parameters when delivering the current delivery fluid; g is the acceleration of gravity; π is 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve.

[0086] Preferably, it also includes:

[0087] A first calculation module, used for calculating a second relief valve control parameter;

[0088] When the second early warning module does not issue an early warning, the first control device controls the delivery pump control parameter adjustment module to work, so that the actual control parameter of the delivery pump is the first delivery pump control parameter; at the same time, the first control device controls the relief valve control parameter adjustment module to work, adjusts the actual control parameter of the relief valve to the second relief valve control parameter, and continues to work for a second set time; and controls the first acquisition module to work several times within the second set time;

[0089]

[0090] V2 is the control parameter of the second relief valve, V max is the overflow valve control parameter when the overflow valve is fully open; D is the nominal diameter of the overflow valve; D0 is the unit diameter; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when delivering the current delivery fluid; ρ is the density of the current delivery fluid; q j0 is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameters when delivering the current delivery fluid; g is the acceleration of gravity; π is 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve; P2 is the control parameter of the first delivery pump; h is the head of the delivery pump;

[0091] a second determination module, for calculating a second target overflow valve control parameter based on the detection value of the first acquisition module; when the second target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the second set time, the first control device controls the overflow valve control parameter adjustment module to work, adjusts the actual control parameter of the overflow valve to the second target overflow valve control parameter, and controls the actual working parameter of the delivery pump to work for the target working time of the first delivery pump control parameter;

[0092]

[0093] V2 is the second target valve opening; V 10 is the valve opening corresponding to the control parameter of the second relief valve; Q 11 is the average value of the flow rate of the fluid detected by the first acquisition module within the second set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; N is the number of detections by the first acquisition module within the second set time; B s B is the sth detection value of the first acquisition module within the second set time period; s-1 is the i-1th detection value of the first acquisition module within the second set time; the second target relief valve control parameter is the relief valve control parameter corresponding to the target valve opening obtained based on the preset relief valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the relief valve; D0 is the unit diameter; W 10 It is the second parameter related to the opening and flow rate.

[0094] The beneficial effects of the above technical solution are:

[0095] If the maximum flow of the overflow valve control parameter-theoretical flow curve under the reference control parameter of the delivery pump is less than or equal to the target flow when delivering the current delivery fluid, the first early warning module issues an early warning to remind the user to adjust the actual control parameter of the pump to increase the flow of the pump; and the third early warning module is used to issue an early warning to remind the user to adjust the control parameter of the delivery pump when the first target overflow valve control parameter is greater than the control parameter of the overflow valve when the overflow valve is fully open;

[0096] Specific:

[0097] The first delivery pump control parameter is calculated based on the target flow rate of the fluid at the outlet of the current relief valve and the relief valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameters when delivering the current delivery fluid, and the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the relief valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameters when delivering the current delivery fluid, so as to ensure that the actual control parameter adjustment of the delivery pump is reliable and realize the reliable increase of the flow rate of the pump;

[0098] Then, based on the first delivery pump control parameter, the target flow rate of the fluid at the current overflow valve outlet, the density of the current delivery fluid, the nominal diameter of the overflow valve, and the overflow valve control parameter when the overflow valve is fully open, the theoretical control parameter of the overflow valve when the delivery pump works with the first delivery pump control parameter (the second overflow valve control parameter, corresponding to the overall state of the current overflow valve and the delivery pump as the initial state);

[0099] When the second early warning module does not issue an early warning, the first control device controls the delivery pump control parameter adjustment module to work, so that the actual control parameter of the delivery pump is the first delivery pump control parameter; at the same time, the first control device controls the relief valve control parameter adjustment module to work, adjusts the actual control parameter of the relief valve to the second relief valve control parameter, and continues to work for the second set time; the test is carried out to determine the flow state (Q) of the fluid at the actual relief valve outlet in the current state (the overall state of the current relief valve and the delivery pump, which may be different from the initial state as the use time increases) 11 , B s , B S-1 ), and then determine the second target valve opening based on the flow state of the fluid at the actual overflow valve outlet in the current state, thereby determining the second target overflow valve control parameters, ensuring that the appropriate second target overflow valve control parameters are finally determined, and ensuring reliable regulation of the flow at the stack overflow valve outlet.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A relief valve flow control system, characterized in that: include: A first collection module, used for collecting parameters of the fluid at the outlet of the relief valve; A relief valve control parameter adjustment module, used to adjust the actual control parameters of the relief valve; A storage module storing a relief valve control parameter-theoretical flow curve when the delivery pump is under a reference control parameter when the relief valve delivers the target fluid; The target fluid is a fluid that can be delivered through a relief valve; In the overflow valve control parameter-theoretical flow curve, the horizontal axis is the overflow valve control parameter, and the vertical axis is the fluid flow at the overflow valve outlet; An acquisition module, used to acquire a target flow rate of the fluid at the current overflow valve outlet and a target working time corresponding to the target flow rate; A screening module, for screening a first relief valve control parameter corresponding to a target flow rate of the fluid at the current relief valve outlet based on a relief valve control parameter-theoretical flow rate curve of a delivery pump under a reference control parameter when delivering the current delivery fluid; A first warning module, if the delivery pump is in the state of delivering the current delivery fluid and the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve is less than or equal to the target flow rate, a warning is issued; The first control device, when the first early warning module does not give an early warning, first controls the overflow valve control parameter adjustment module to work, adjusts the actual control parameter of the overflow valve to the first overflow valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continuously works for a first set time, and controls the first acquisition module to work several times within the first set time; A first determination module, configured to calculate a first target relief valve control parameter based on a detection value of the first acquisition module; When the first target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the first set time, the first control device controls the overflow valve control parameter adjustment module to operate, adjusts the actual control parameter of the overflow valve to the first target overflow valve control parameter, and simultaneously controls the actual working parameter of the delivery pump to work as the benchmark control parameter for the target working time.

2. A relief valve flow control system according to claim 1, characterized in that: Also includes: The third early warning module is used to issue an early warning when the first target overflow valve control parameter is greater than the control parameter of the overflow valve when the overflow valve is fully open.

3. The overflow valve flow control system according to claim 1, characterized in that: The reference control parameter is a rated control parameter of the delivery pump.

4. The overflow valve flow control system according to claim 1, characterized in that: The first determination module calculates the first target relief valve control parameter based on the following formula: V1 is the first target valve opening; V0 is the valve opening corresponding to the first overflow valve control parameter; Q is the average value of the flow rate of the fluid detected by the first acquisition module within the first set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; M is the number of detections by the first acquisition module within the first set time; Q i Q is the i-th detection value of the first acquisition module within the first set time period; i-1 It is the i-1th detection value of the first acquisition module within the first set time length; the first target overflow valve control parameter is the overflow valve control parameter corresponding to the first target valve opening obtained based on the preset overflow valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the overflow valve; D0 is the unit diameter; W1 is the first parameter of the opening related to the flow.

5. The overflow valve flow control system according to claim 1, characterized in that: The storage module also stores theoretical fluid parameters at the outlet of the delivery pump corresponding to the maximum ordinate of the theoretical flow curve of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameter when the overflow valve delivers the target fluid; The overflow valve flow regulation system also includes: A second calculation module is used to calculate the control parameter of the first delivery pump based on the target flow rate of the fluid at the current overflow valve outlet and the overflow valve control parameter-theoretical flow curve of the delivery pump under the reference control parameter when delivering the current delivery fluid when the first warning module issues an alarm; A second early warning module, used for issuing a second early warning when the control parameter of the first delivery pump is greater than the maximum allowable control parameter of the delivery pump; The delivery pump control parameter adjustment module is used to adjust the delivery pump control parameters. The first control device controls the delivery pump control parameter adjustment module to work.

6. The overflow valve flow control system according to claim 5, characterized in that: The first delivery pump control parameters are calculated based on the following formula: P1 is the base control parameter of the delivery pump; P2 is the control parameter of the first delivery pump; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the base control parameter when delivering the current delivery fluid; h is the head of the delivery pump, γ is the working efficiency of the delivery pump; ρ is the density of the current delivery fluid; q j0 It is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the benchmark control parameters when delivering the current delivery fluid; g is the acceleration of gravity; the value of Q0 is 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve.

7. The overflow valve flow control system according to claim 5, characterized in that: Also includes: A first calculation module, used for calculating a second relief valve control parameter; When the second early warning module does not issue an early warning, the first control device controls the delivery pump control parameter adjustment module to work, so that the actual control parameter of the delivery pump is the first delivery pump control parameter; at the same time, the first control device controls the relief valve control parameter adjustment module to work, and adjusts the actual control parameter of the relief valve to the second relief valve control parameter, and continues to work for the second set time; and controlling the first acquisition module to work several times within a second set time period; A second determination module, used for calculating a second target relief valve control parameter based on the detection value of the first acquisition module; When the second target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the second set time, the first control device controls the overflow valve control parameter adjustment module to operate, and adjusts the actual control parameter of the overflow valve to the second target overflow valve control parameter, and at the same time controls the actual working parameter of the delivery pump to the first delivery pump control parameter to work for the target working time.

8. The overflow valve flow control system according to claim 7, characterized in that: The first calculation module calculates the second relief valve control parameter based on the following formula: V2 is the control parameter of the second relief valve, V max is the overflow valve control parameter when the overflow valve is fully open; D is the nominal diameter of the overflow valve; D0 is the unit diameter; q is the maximum ordinate corresponding to the overflow valve control parameter-theoretical flow curve when the delivery pump is under the reference control parameter when delivering the current delivery fluid; ρ is the density of the current transported fluid; q j0 is the theoretical flow rate at the outlet of the delivery pump corresponding to the maximum ordinate of the overflow valve control parameter-theoretical flow rate curve when the delivery pump is under the reference control parameters when delivering the current delivery fluid; g is the acceleration of gravity; π is 3.14; Q0 is the target flow rate of the fluid at the outlet of the current overflow valve; P2 is the control parameter of the first delivery pump; h is the head of the delivery pump; The second determination module calculates the second target relief valve control parameter based on the following formula: V2 is the second target valve opening; V 10 is the valve opening corresponding to the control parameter of the second relief valve; Q 11 is the average value of the flow rate of the fluid detected by the first acquisition module within the second set time; Q0 is the target flow rate of the fluid at the current overflow valve outlet; N is the number of detections by the first acquisition module within the second set time; B s B is the sth detection value of the first acquisition module within the second set time period; s-1 The i-1th detection value of the first acquisition module within the second set time period; The second target relief valve control parameter is the relief valve control parameter corresponding to the target valve opening obtained based on the preset relief valve opening-relief valve control parameter; w is the unit flow; D is the nominal diameter of the relief valve; D0 is the unit diameter; W 10 It is the second parameter related to the opening and flow rate.

9. A method for regulating flow of a relief valve, characterized in that: include: Step S1: The target flow rate of the fluid at the current overflow valve outlet and the target working time corresponding to the target flow rate are selected based on the overflow valve control parameter-theoretical flow rate curve of the delivery pump under the reference control parameter when delivering the current delivery fluid, and the first overflow valve control parameter corresponding to the target flow rate of the fluid at the current overflow valve outlet is selected; If the delivery pump is under the reference control parameter when delivering the current delivery fluid, and the maximum flow rate of the overflow valve control parameter-theoretical flow rate curve is less than or equal to the target flow rate, the first warning module issues a warning; Step S2: When the first early warning module does not issue an early warning, the first control device first controls the overflow valve control parameter adjustment module to operate, adjusts the actual control parameter of the overflow valve to the first overflow valve control parameter, and controls the actual working parameter of the delivery pump to be the reference control parameter, and continuously operates for a first set time, and controls the first acquisition module to operate several times within the first set time; Step S3: The first determination module is used to calculate the first target overflow valve control parameter based on the detection value of the first acquisition module; when the first target overflow valve control parameter is less than or equal to the control parameter of the overflow valve when the overflow valve is fully open, after the first set time, the first control device controls the overflow valve control parameter adjustment module to work, and adjusts the actual control parameter of the overflow valve to the first target overflow valve control parameter, and at the same time controls the actual working parameter of the delivery pump to work as the benchmark control parameter for the target working time.

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