Liquid delivery device and method

Abstract

The present application provides a liquid delivery device and method, which includes: a water tank, a water pump motor and a flow meter, wherein a first side of the water tank is fixedly connected to the water pump motor via a first connecting pipe, the water pump motor is fixedly connected to a water outlet via a second connecting pipe, and a second side of the water tank is fixedly connected to the flow meter via a third connecting pipe, the water pump motor includes a control unit for controlling the water pump motor to generate a first vibration, a liquid flow out of the water tank to generate a second vibration, the liquid flow flows to the flow meter, the flow meter generates a third vibration, the second vibration of the liquid flow and the third vibration of the flow meter generate a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies the following: f(v t ‑v a ) / v t ≤f l ≤f(v t +v b ) / v t Based on the vibration frequency of the flow meter, the liquid flow flushes the impeller of the flow meter, so that the adhesive on the impeller of the flow meter in the drone spraying system is washed away, solving the problem of impeller blocking.

Description

Technical Field

[0001] The present application relates to plant protection drone spraying, and more specifically, to a device and method for liquid delivery. Background Art

[0002] When plant protection drones are spraying, they usually work in the field. In many cases, users use local materials to mix water and pesticides, which will cause some small foreign matter to be introduced. In addition, some pesticides themselves contain fine particles, and some have some viscosity, which often accumulate at the inlet of the plant protection drone's flow meter, causing the flow meter to be blocked, thereby causing distortion in flow measurement.

[0003] How to fix the impeller jam problem of the plant protection drone flow meter is a question worth considering. Summary of the Invention

[0004] The present application provides a device and method for liquid delivery, which aims to make the vibration frequency at the flow meter wider through the vibration transmission of the water pump motor in the drone spraying system, and partially repair the flow meter blockage problem caused by the vibration within this frequency range, and repair the flow meter impeller blockage problem by the force generated by the change of liquid flow velocity through the control of the water pump motor and the solenoid valve.

[0005] In a first aspect, a liquid conveying device is provided, which includes: a water tank, a water pump motor and a flow meter, wherein a first side of the water tank is fixedly connected to the water pump motor via a first connecting pipe, the water pump motor is fixedly connected to a water outlet via a second connecting pipe, and a second side of the water tank is fixedly connected to the flow meter via a third connecting pipe, the water pump motor includes a control unit for controlling the water pump motor to generate a first vibration, the liquid flow out of the water tank generates a second vibration based on the first vibration of the water pump motor, the liquid flow flows to the flow meter, the flow meter generates a third vibration based on the second vibration, the second vibration of the liquid flow and the third vibration of the flow meter generate a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies: f(v t -v a ) / v t ≤f l ≤f(v t +v b ) / v t , based on the vibration frequency of the flow meter, the liquid flow flushes the impeller of the flow meter,

[0006] Among them, f l is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of the liquid flow velocity, v b is the maximum value of the liquid flow velocity.

[0007] Based on the above scheme, the first vibration is generated by the control unit of the water pump motor in the liquid conveying device, the second vibration is generated by the liquid flow according to the first vibration, and the third vibration is generated in the flow meter according to the second vibration. The Doppler effect produced by the second vibration and the third vibration makes the vibration frequency at the flow meter wider, and the vibration at the high frequency produces a greater impact force so that the more stubborn adhesions at the impeller are washed away, solving the problem of impeller blockage. The smaller impact force is produced at the low frequency so that the loose attachments (such as grease, etc.) at the impeller are washed away by the impact force generated by the low vibration frequency, thereby repairing the problem of flowmeter impeller blockage.

[0008] In combination with the first aspect, in certain implementations of the first aspect, a vibration direction of the first vibration is the same as a first direction of the liquid flow velocity.

[0009] It should be understood that the water pump motor will also generate vibration during normal operation, but the first vibration in this application mainly refers to the vibration generated by the control unit in the water pump motor. In addition, the vibration direction of the first vibration is the same as the first direction of the liquid flow velocity. For example, if the direction of the liquid flow is right, the vibration direction of the first vibration is also right, that is, it is sufficient to ensure that the vibration direction is horizontal.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the device also includes: a solenoid valve, the flowmeter is fixedly connected to the solenoid valve through a fourth connecting pipe, the fourth connecting pipe is connected to the second connecting pipe, and the solenoid valve is used to adjust the vibration speed generated by the first vibration and the switch of the solenoid valve, so that the liquid flow speed changes, generating a force on the flowmeter to flush the impeller of the flowmeter.

[0011] Based on the above solution, an electromagnetic valve device is added next to the flow meter. The first vibration generated by the water pump motor causes the liquid flow to generate a second vibration. The second vibration of the liquid flow and the third vibration of the flow meter make the vibration frequency at the flow meter wider. On this basis, an electromagnetic valve device is added. By opening and closing the electromagnetic valve, the speed of the liquid flow changes and different forces are generated. This force flushes the impeller of the flow meter, thereby solving the problem of impeller blockage of the flow meter.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the vibration frequency of the water pump motor includes frequencies of a fundamental frequency, a second harmonic, and a fourth harmonic.

[0013] In combination with the first aspect, in certain implementations of the first aspect, adjusting the vibration speed generated by the first vibration and the switching of the solenoid valve includes: increasing the vibration speed generated by the first vibration and opening the solenoid valve so that the acceleration generated by the change in liquid flow velocity is greater than 0.

[0014] Based on the above scheme, when a>0, the liquid flow forms a thrust f on the impeller of the flowmeter. a , you can adjust f by controlling the speed of the water pump motor and opening the solenoid valve at the same time a The size of the force is such that the blockage on the impeller is flushed away, allowing the impeller to work normally.

[0015] In combination with the first aspect, in certain implementations of the first aspect, adjusting the vibration speed generated by the first vibration and the switching of the solenoid valve includes: reducing the vibration speed generated by the first vibration and opening the solenoid valve, or stopping the water pump motor and opening the solenoid valve so that the acceleration generated by the change in liquid flow velocity is less than 0.

[0016] Based on the above scheme, when a<0, the liquid flow forms a pulling force f on the impeller of the flowmeter b When the water pump motor is turned on and the solenoid valve is opened, the direction of the liquid flow velocity, the water pump motor is stopped and the solenoid valve is closed, the water flowing to the right, due to the sudden deceleration caused by the closing of the water pump motor and the solenoid valve and the sudden change in liquid flow velocity, a reaction force is generated, so that the force flushes the blockage on the impeller, allowing the impeller to work normally.

[0017] In combination with the first aspect, in certain implementations of the first aspect, the solenoid valve controls the switch through a remote control device.

[0018] Based on the above scheme, the operator operates the liquid conveying device through a remote control device. Specifically, in this application, by controlling the vibration speed of the water pump motor or the switch of the water pump motor and the switch of the solenoid valve, the blockage on the flow meter impeller is washed away by vibration, thereby solving the impeller blocking problem of the plant protection drone flow meter.

[0019] In a second aspect, a method for liquid delivery is provided, which is applied to a device for liquid delivery. The device includes a water tank, a water pump motor, and a flow meter. A first side of the water tank is fixedly connected to the water pump motor via a first connecting pipe, the water pump motor is fixedly connected to a water outlet via a second connecting pipe, and a second side of the water tank is fixedly connected to the flow meter via a third connecting pipe.

[0020] The method includes:

[0021] The water pump motor includes a control unit for controlling the water pump motor to generate a first vibration,

[0022] The liquid flowing out of the water tank generates a second vibration according to the first vibration of the water pump motor, and the liquid flows to the flow meter, which generates a third vibration according to the second vibration.

[0023] The second vibration of the liquid flow and the third vibration of the flow meter produce a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies: f(v t -va ) / v t ≤f l ≤f(v t +v b ) / v t , based on the vibration frequency of the flow meter, the liquid flow washes the impeller of the flow meter,

[0024] Among them, f l is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of liquid flow velocity, v b is the maximum value of the liquid flow velocity.

[0025] Based on the above scheme, the first vibration is generated by the control unit of the water pump motor, the second vibration is generated by the liquid flow according to the first vibration, and the third vibration is generated in the flow meter according to the second vibration. The Doppler effect produced by the second vibration and the third vibration makes the vibration frequency at the flow meter wider, and the vibration at the high frequency produces a greater impact force so that the more stubborn adhesions at the impeller are washed away, solving the problem of impeller blockage. The smaller impact force is produced at the low frequency so that the loose attachments at the impeller (such as grease, etc.) are washed away by the impact force generated by the low vibration frequency, thereby repairing the problem of flowmeter impeller blockage.

[0026] In combination with the second aspect, in certain implementations of the second aspect, a vibration direction of the first vibration is the same as the first direction of the liquid flow velocity.

[0027] It should be understood that the water pump motor will also generate vibration during normal operation, but the first vibration in this application mainly refers to the vibration generated by the control unit in the water pump motor. In addition, the vibration direction of the first vibration is the same as the first direction of the liquid flow velocity. For example, if the direction of the liquid flow is right, the vibration direction of the first vibration is also right, that is, it is sufficient to ensure that the vibration direction is horizontal.

[0028] In combination with the second aspect, in certain implementations of the second aspect, the liquid delivery device further includes a solenoid valve, the flow meter is fixedly connected to the solenoid valve via a fourth connecting pipe, and the fourth connecting pipe is connected to the second connecting pipe.

[0029] The method further includes:

[0030] The vibration speed generated by the first vibration and the switch of the electromagnetic valve are adjusted to change the liquid flow speed, thereby generating a force on the flow meter to flush the impeller of the flow meter.

[0031] Based on the above solution, an electromagnetic valve device is added next to the flow meter. The first vibration generated by the water pump motor causes the liquid flow to generate a second vibration. The second vibration of the liquid flow and the third vibration of the flow meter make the vibration frequency at the flow meter wider. On this basis, an electromagnetic valve device is added. By opening and closing the electromagnetic valve, the speed of the liquid flow changes and different forces are generated. This force flushes the impeller of the flow meter, thereby solving the problem of impeller blockage of the flow meter.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the adjusting of the vibration speed generated by the first vibration and the switching of the solenoid valve includes: increasing the vibration speed generated by the first vibration and opening the solenoid valve so that the acceleration generated by the change in liquid flow velocity is greater than 0.

[0033] Based on the above scheme, when a>0, the liquid flow forms a thrust f on the impeller of the flowmeter. a , you can adjust f by controlling the speed of the water pump motor and opening the solenoid valve at the same time a The size of the force is such that the blockage on the impeller is flushed away, allowing the impeller to work normally.

[0034] In combination with the second aspect, in certain implementations of the second aspect, adjusting the vibration speed generated by the first vibration and the opening and closing of the solenoid valve includes: reducing the vibration speed generated by the first vibration and opening the solenoid valve, or,

[0035] The water pump motor is stopped and the solenoid valve is opened so that the acceleration generated by the change in the liquid flow velocity is less than 0.

[0036] Based on the above scheme, when a<0, the liquid flow forms a pulling force f on the impeller of the flowmeter b When the water pump motor is turned on and the solenoid valve is opened, the direction of the liquid flow velocity, the water pump motor is stopped and the solenoid valve is closed, the water flowing to the right, due to the sudden deceleration caused by the closing of the water pump motor and the solenoid valve and the sudden change in liquid flow velocity, a reaction force is generated, so that the force flushes the blockage on the impeller, allowing the impeller to work normally.

[0037] In combination with the second aspect, in certain implementations of the second aspect, the solenoid valve controls the switch through a remote control device.

[0038] Based on the above scheme, the operator operates the liquid conveying device through a remote control device. Specifically, in this application, by controlling the vibration speed of the water pump motor or the switch of the water pump motor and the switch of the solenoid valve, the blockage on the flow meter impeller is washed away by vibration, thereby solving the impeller blocking problem of the plant protection drone flow meter.

[0039] In a third aspect, a computer-readable storage medium is provided, comprising a computer program, which, when executed on a computer device, causes a processing unit in the computer device to execute instructions of the method in the first aspect or any possible implementation of the first aspect.

[0040] In a fourth aspect, a computer program product is provided, comprising computer program instructions, which enable a computer to execute the method in the above-mentioned first aspect or each implementation of the first aspect.

[0041] In a fifth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in the first aspect or any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the flow meter for the plant protection drone in this application.

[0043] Figure 2 Schematic diagram of the liquid delivery device 200 of the present application.

[0044] Figure 3 It is a schematic diagram of a vibration signal 300 of a water pump motor of a liquid delivery device of the present application.

[0045] Figure 4 It is a schematic diagram of the force analysis process 400 of the flow meter of the liquid delivery device of the present application.

[0046] Figure 5 is a flow chart of the liquid delivery method 500 of the present application. DETAILED DESCRIPTION

[0047] The technical solution in this application will be described below with reference to the accompanying drawings.

[0048] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0049] Figure 1 This is a schematic diagram of the plant protection drone flow meter provided in the embodiment of this application. Figure 1As shown in the figure, the working process of the impeller flowmeter is that when the fluid flows in the pipeline, it impacts the turbine blades, causing the turbine to rotate. The turbine's rotation speed changes with the flow rate. Finally, the flow value is calculated from the number of turbine revolutions. It is counted and displayed on the secondary instrument, which can reflect the instantaneous flow rate and cumulative flow rate (or total flow rate). It can also be converted into a standard signal for remote transmission. In addition, the pulse frequency signal output by the sensor can be used independently in conjunction with a computer. The computer can replace the flow display instrument to achieve density, temperature, and pressure compensation, and display the fluid volume flow rate or mass flow rate.

[0050] When the fluid passes through the sensor housing, the impeller blades have a certain angle with the flow direction, and the impact of the fluid causes the blades to have a rotational torque. After overcoming the friction torque and fluid resistance, the blades rotate. After the torque is balanced, the speed stabilizes. Under certain conditions, the speed is proportional to the flow rate. Since the blades are magnetically conductive, they are in the magnetic field of the signal detector (composed of permanent magnets and coils). The rotating blades cut the magnetic lines of force, periodically changing the magnetic flux of the coil, thereby inducing an electric pulse signal at both ends of the coil. This signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the display instrument to show the instantaneous flow rate or cumulative flow rate of the fluid.

[0051] In a certain flow range, the pulse frequency f is related to the instantaneous flow rate q of the fluid flowing through the sensor. v The flow equation is:

[0052] q v =3600×f / k Formula 1 Where, q v is the instantaneous flow rate of the fluid, f is the pulse frequency, and k is the instrument factor of the sensor.

[0053] The advantages of impeller flowmeters are excellent repeatability and responsiveness, simple structure, low price, and the ability to perform large-capacity measurements in a compact package. Their disadvantage is that they are extremely sensitive to foreign matter and can easily become clogged.

[0054] When the plant protection drone is spraying, foreign matter adheres to the impeller of the impeller flowmeter, causing the impeller to jam. In order to solve this problem, this application solves the impeller jam problem of the plant protection drone flowmeter through the vibration of the water motor pump and the joint control of the water pump motor and the solenoid valve.

[0055] The liquid delivery device 200 of the present application is as follows Figure 2 As shown, the liquid delivery device consists of a water tank, a water pump motor, a flow meter, and a solenoid valve. The first side of the water tank is fixedly connected to the water pump motor via a first connecting pipe, which is fixedly connected to the water outlet via a second connecting pipe. The second side of the water tank is fixedly connected to the flow meter via a third connecting pipe, which is fixedly connected to the solenoid valve via a fourth connecting pipe, which is connected to the second connecting pipe.

[0056] It should be understood that the liquid delivery device in the present application is located on the plant protection drone, that is, when the plant protection drone encounters a stall problem during spraying, the liquid delivery device in the plant protection drone is used to repair the flow meter impeller.

[0057] The water pump motor has two functions in repairing the impeller of the flow meter, namely:

[0058] Function 1: The water pump motor serves as a vibration signal source.

[0059] Specifically, the water pump motor includes a control unit configured to control the water pump motor to generate a first vibration. The liquid flowing out of the water tank generates a second vibration based on the first vibration of the water pump motor, and the liquid flows to the flow meter. The flow meter generates a third vibration based on the second vibration. The second vibration of the liquid flow and the third vibration of the flow meter produce a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies Equation 2:

[0060] f(v t -v a ) / v t ≤f l ≤f(v t +v b ) / v t Formula 2

[0061] Among them, f i is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of the liquid flow velocity, v b is the maximum value of the liquid flow velocity.

[0062] It should be understood that the liquid flow rate can be within a range and can be adjusted according to the working state of the conveying device. This application does not impose any limitation on this range.

[0063] When the vibration source is a water pump motor, the vibration frequency of the water pump motor is f, such as Figure 3 As shown, the main energy of the vibration is distributed in the fundamental frequency, the second harmonic and the fourth harmonic, wherein the frequencies distributed in the fundamental frequency, the second harmonic and the fourth harmonic are f1, f2 and f3 respectively.

[0064] It should be understood that f is primarily composed of f1, f2, and f3. The frequency of vibration, whether fundamental, secondary, or quartic, affects scouring. The fundamental wave has the lowest frequency. In liquid conveying devices, the fundamental wave determines the system's basic vibration mode. If the frequency of the fundamental wave is close to the natural frequency of the medium (such as sand) attached to the impeller and requiring scouring, resonance may occur, intensifying the scouring effect. Furthermore, the amplitude of the fundamental wave directly affects the scouring intensity; the larger the amplitude, the stronger the scouring effect. The secondary wave has twice the frequency of the fundamental wave and produces a more complex vibration pattern in the conveying device. The secondary wave causes periodic acceleration and deceleration of the scouring medium, thereby changing the intensity and direction of the scouring effect. The quartic wave has four times the frequency of the fundamental wave and produces a more complex and variable vibration pattern in the conveying device. The quartic wave causes irregular vibration and flow in the scouring medium, thereby increasing the randomness and uncertainty of the scouring effect.

[0065] The vibration frequency generated by the third vibration of the flow meter can be specifically divided into the following two implementation methods through formula 2:

[0066] One possible implementation method is that when the direction of the first vibration of the water pump motor is the same as the direction of the liquid flow velocity, it means that the direction of the liquid flow velocity is close to the flow meter. At this time, the vibration frequency of the third vibration generated by the first vibration and the second vibration at the flow meter is f(v t +v b ) / v t The vibration frequency at the flow meter becomes higher, which makes it have better impact force, so that the stubborn attachments attached to the impeller are washed away by this strong impact force, thereby eliminating the blockage of the impeller of the flow meter.

[0067] One possible implementation method is that when the direction of the first vibration of the water pump motor is opposite to the direction of the liquid flow velocity, it means that the liquid flow velocity is in the direction away from the flow meter. At this time, the vibration frequency of the third vibration generated by the first vibration and the second vibration at the flow meter is f(v t -v a ) / v t The vibration frequency at the flow meter becomes lower, so that the loose attachments (such as grease, etc.) attached to the impeller are washed away by the impact force generated by the low vibration frequency, so that the blockage of the impeller disappears.

[0068] It should be understood that the Doppler effect refers to the change in the frequency of a signal when the relative motion between the signal source and the receiver changes. In front of the moving source, the wave is compressed, the wavelength becomes shorter, and the frequency becomes higher. Behind the moving source, the opposite effect occurs, the wavelength becomes longer, and the frequency becomes lower. The higher the speed of the wave source, the greater the effect. The formula for the Doppler effect of sound waves is: in is the sound frequency received by the receiver, f is the sound frequency emitted by the sound source, l is the distance between the sound source and the receiver, and d is the change in the distance between the sound source and the receiver in the direction of relative motion.

[0069] It should also be understood that the disappearance of impeller blockage and the repair of the impeller have the same meaning, and what is ultimately achieved is the normal operation of the impeller of the flow meter. This application does not impose any restrictions on this.

[0070] Function 2: The water pump motor serves as a controller of liquid flow rate.

[0071] Specifically, the pump motor is combined with a solenoid valve to control the flow rate. The acceleration generated by the change in flow rate is used to analyze the force applied to the flow meter.

[0072] The formula for acceleration is as follows:

[0073] a=d v / d t Formula 3

[0074] The force process of the flow meter can be divided into the following situations according to the magnitude of the acceleration, which can be combined with Figure 4 Perform analysis:

[0075] Case 1: When a=0, the liquid flows at a uniform speed, that is, when the impeller is normal and not blocked, the operator can use the remote control device to make the liquid flow at a uniform speed.

[0076] Case 2: When a>0, the liquid flow forms a thrust f on the impeller of the flowmeter a , f a The direction of Figure 4 As shown, f can be adjusted by controlling the speed of the water pump motor and opening the solenoid valve at the same time. a The size of the force is such that the blockage on the impeller is flushed away, allowing the impeller to work normally.

[0077] It should be understood that when the impeller is not blocked, the speed at which the water pump motor generates vibration is 2000 rpm. In the event of blockage, the operator can adjust the speed of the water pump motor up and down based on this speed. This application does not specifically set the speed of the water pump motor in the event of blockage.

[0078] Case 3: When a<0, the liquid flow forms a pulling force f on the impeller of the flowmeter b , f b The direction of Figure 4 As shown in the figure, when the water pump motor is turned on and the solenoid valve is opened, the direction of the liquid flow velocity, the water pump motor is stopped and the solenoid valve is closed, and the water flowing to the right generates a reaction force due to the sudden deceleration caused by the closing of the water pump motor and the solenoid valve and the sudden change in the liquid flow velocity, so that the force flushes the blockage on the impeller, allowing the impeller to work normally.

[0079] It should be understood that no matter whether the flow meter is subjected to thrust or pull, the liquid flow at the flow meter will generate an impact force greater than the uniform speed, thereby achieving the purpose of eliminating impeller blockage.

[0080] It should also be understood that the solenoid valve is part of the liquid delivery device, and an operator can use a remote control device to operate the opening and closing of the solenoid valve.

[0081] It should also be understood that the solenoid valve acts as a valve, and other structures that can play a similar role can also replace the solenoid valve, such as ordinary valves, etc. This application does not impose any restrictions on this.

[0082] In this embodiment, the water pump motor and the electromagnetic valve are combined to generate corresponding acceleration due to the rapid change of the liquid flow velocity. The force acting on the flow meter is used to flush the impeller blockage, thereby achieving the purpose of normal operation of the impeller.

[0083] The present application also provides a method for liquid delivery, such as Figure 5 The specific steps are as follows:

[0084] 501, the water pump motor generates a first vibration;

[0085] Specifically, the water pump motor includes a control unit for controlling the water pump motor to generate a first vibration.

[0086] It should be understood that the water pump motor will also generate vibration during normal operation, but the first vibration in this application mainly refers to the vibration generated by the control unit in the water pump motor. In addition, the vibration direction of the first vibration is the same as the first direction of the liquid flow velocity. For example, if the direction of the liquid flow is right, the vibration direction of the first vibration is also right, that is, it is sufficient to ensure that the vibration direction is horizontal.

[0087] 502, the liquid flowing out of the water tank generates a second vibration according to the first vibration of the water pump motor;

[0088] 503, a liquid flow channel flow meter, the flow meter generates a third vibration according to the second vibration;

[0089] 504, the second vibration of the liquid flow and the third vibration of the flow meter produce a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies: f(v t -v a ) / v t ≤f l ≤f(v t +v b ) / v t , based on the vibration frequency of the flow meter, the liquid flow flushes the impeller of the flow meter.

[0090] Among them, fl is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of the liquid flow velocity, v b is the maximum value of the liquid flow velocity.

[0091] It should be understood that the liquid flow rate can be within a range and can be adjusted according to the working status of the dredging device. This application does not impose any restrictions on this range.

[0092] The vibration frequency of the third vibration of the flow meter can be realized in the following two ways:

[0093] One possible implementation method is that when the direction of the first vibration of the water pump motor is the same as the direction of the liquid flow velocity, it means that the direction of the liquid flow velocity is close to the flow meter. At this time, the vibration frequency of the third vibration generated by the first vibration and the second vibration at the flow meter is f(v t +v b ) / v t The vibration frequency at the flow meter becomes higher, which makes it have better impact force, so that the stubborn attachments attached to the impeller are washed away by this strong impact force, thereby eliminating the blockage of the impeller of the flow meter.

[0094] One possible implementation method is that when the direction of the first vibration of the water pump motor is opposite to the direction of the liquid flow velocity, it means that the liquid flow velocity is in the direction away from the flow meter. At this time, the vibration frequency of the third vibration generated by the first vibration and the second vibration at the flow meter is f(v t -v a ) / v t The vibration frequency at the flow meter becomes lower, so that the loose attachments (such as grease, etc.) attached to the impeller are washed away by the impact force generated by the low vibration frequency, so that the blockage of the impeller disappears.

[0095] Based on the above scheme, the first vibration is generated by the control unit of the water pump motor, the second vibration is generated by the liquid flow according to the first vibration, and the third vibration is generated in the flow meter according to the second vibration. The Doppler effect produced by the second vibration and the third vibration makes the vibration frequency at the flow meter wider, and the vibration at the high frequency produces a greater impact force so that the more stubborn adhesions at the impeller are washed away, solving the problem of impeller blockage. The smaller impact force is produced at the low frequency so that the loose attachments at the impeller (such as grease, etc.) are washed away by the impact force generated by the low vibration frequency, thereby repairing the problem of flowmeter impeller blockage.

[0096] In addition, in this method, the joint control of the water pump motor and the electromagnetic valve is also used to solve the problem of repairing the impeller of the flow meter.

[0097] Specifically, the pump motor is combined with a solenoid valve to control the flow rate. The acceleration generated by the change in flow rate is used to analyze the force applied to the flow meter.

[0098] The force process of the flow meter can be divided into the following situations according to the magnitude of the acceleration:

[0099] Case 1: When a=0, the liquid flows at a uniform speed, that is, when the impeller is normal and not blocked, the operator can use the remote control device to make the liquid flow at a uniform speed.

[0100] Case 2: When a>0, the liquid flow forms a thrust f on the impeller of the flowmeter a , f a Direction and installation process Figure 4 f in a The direction of the water pump is consistent, and the f can be adjusted by controlling the speed of the water pump motor and opening the solenoid valve at the same time. a The size of the force is such that the blockage on the impeller is flushed away, allowing the impeller to work normally.

[0101] It should be understood that when the impeller is not blocked, the speed at which the water pump motor generates vibration is 2000 rpm. In the event of blockage, the operator can adjust the speed of the water pump motor up and down based on this speed. This application does not specifically set the speed of the water pump motor in the event of blockage.

[0102] Case 3: When a<0, the liquid flow forms a pulling force f on the impeller of the flowmeter b , f b Direction and installation process Figure 4 f in b The direction of the liquid flow rate is consistent. When the water pump motor is turned on and the solenoid valve is opened, the direction of the liquid flow rate is consistent. When the water pump motor is stopped and the solenoid valve is closed, the water flowing to the right will generate a reaction force due to the sudden deceleration caused by the closing of the water pump motor and the solenoid valve and the sudden change in liquid flow rate. This force flushes the blockage on the impeller, allowing the impeller to work normally.

[0103] It should be understood that no matter whether the flow meter is subjected to thrust or pull, the liquid flow at the flow meter will generate an impact force greater than the uniform speed, thereby achieving the purpose of eliminating impeller blockage.

[0104] It should also be understood that the solenoid valve is part of the liquid delivery device, and an operator can use a remote control device to operate the opening and closing of the solenoid valve.

[0105] It should also be understood that the solenoid valve acts as a valve, and other structures that can play a similar role can also replace the solenoid valve, such as ordinary valves, etc. This application does not impose any restrictions on this.

[0106] In this embodiment, the water pump motor and the electromagnetic valve are combined to generate corresponding acceleration due to the rapid change of the liquid flow velocity. The force acting on the flow meter is used to flush the impeller blockage, thereby achieving the purpose of normal operation of the impeller.

[0107] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0108] Optionally, the computer-readable storage medium can be applied to the flow meter repair device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes in each unit of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0109] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0110] Optionally, the computer program product can be applied to the liquid delivery device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes in each unit of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0111] The embodiment of the present application also provides a computer program.

[0112] Optionally, the computer program can be applied to the liquid delivery device in the embodiment of the present application. When the computer program runs on a computer, the computer executes the corresponding processes in each unit of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0113] It should be understood that the processor of the embodiment of the present application may be an integrated circuit image processing system with signal processing capabilities. During implementation, each unit of the above-mentioned device embodiment can be implemented by hardware integrated logic circuits in the processor or software instructions. The above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, or discrete hardware components. The steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The device disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware decoding processor for execution, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the above-mentioned device in combination with its hardware.

[0114] During implementation, the above-mentioned device can be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor executes the instructions in the memory, and completes the steps of the above-mentioned method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0115] It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments. The same or similar points that are not mentioned can be referenced with each other. For the sake of brevity, they will not be repeated here.

[0116] It should be understood that in the embodiments of this application, the term "and / or" is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exists simultaneously, and three possible relationships exist. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0117] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0118] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0120] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0121] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0122] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0123] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A liquid delivery device, characterized in that: It includes a water tank, a water pump motor and a flow meter. The first side of the water tank is fixedly connected to the water pump motor through a first connecting pipe, the water pump motor is fixedly connected to the water outlet through a second connecting pipe, and the second side of the water tank is fixedly connected to the flow meter through a third connecting pipe. The water pump motor includes a control unit for controlling the water pump motor to generate a first vibration. The liquid flow out of the water tank generates a second vibration according to the first vibration of the water pump motor, and the liquid flow flows to the flow meter. The flow meter generates a third vibration according to the second vibration, The second vibration of the liquid flow and the third vibration of the flow meter produce a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies: f(v t -v a ) / v t ≤f l ≤f(v t +v b ) / v t Based on the vibration frequency of the flow meter, the liquid flow flushes the impeller of the flow meter. Among them, f l is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of the liquid flow velocity, v b is the maximum value of the liquid flow velocity.

2. The device according to claim 1, characterized in that The vibration direction of the first vibration is the same as the first direction of the liquid flow velocity.

3. The device according to claim 1, characterized in that Also includes: The solenoid valve, the flow meter is fixedly connected to the solenoid valve through a fourth connecting pipe, and the fourth connecting pipe is connected to the second connecting pipe, The solenoid valve is used to adjust the vibration speed generated by the first vibration and the switch of the solenoid valve, so that the liquid flow speed changes, generating a force on the flow meter to flush the impeller of the flow meter.

4. The device according to claim 3, characterized in that The adjusting of the vibration speed generated by the first vibration and the opening and closing of the electromagnetic valve includes: increasing the vibration speed generated by the first vibration and opening the electromagnetic valve, so that the acceleration generated by the change in the liquid flow speed is greater than 0.

5. The device according to claim 3, characterized in that The adjusting of the vibration speed generated by the first vibration and the opening and closing of the electromagnetic valve includes: reducing the vibration speed generated by the first vibration and opening the electromagnetic valve, or, The water pump motor is stopped and the solenoid valve is opened so that the acceleration generated by the change in the liquid flow velocity is less than 0.

6. The device according to any one of claims 3 to 5, characterized in that The solenoid valve controls the switch via a remote control device.

7. A method for liquid delivery, characterized in that: A device for liquid transportation, comprising a water tank, a water pump motor, and a flow meter, wherein a first side of the water tank is fixedly connected to the water pump motor via a first connecting pipe, the water pump motor is fixedly connected to a water outlet via a second connecting pipe, and a second side of the water tank is fixedly connected to the flow meter via a third connecting pipe. The method comprises: The water pump motor includes a control unit for controlling the water pump motor to generate a first vibration. The liquid flow out of the water tank generates a second vibration according to the first vibration of the water pump motor, and the liquid flow flows to the flow meter, and the flow meter generates a third vibration according to the second vibration. The second vibration of the liquid flow and the third vibration of the flow meter produce a Doppler effect, so that the vibration frequency generated by the third vibration of the flow meter satisfies: f(v t -v a ) / v t ≤f l ≤f(v y +v b ) / v t Based on the vibration frequency of the flow meter, the liquid flow flushes the impeller of the flow meter. Among them, f l is the vibration frequency generated by the third vibration, v t is the vibration speed generated by the first vibration, f is the vibration frequency generated by the first vibration, v a is the minimum value of the liquid flow velocity, v b is the maximum value of the liquid flow velocity.

8. The method according to claim 7, characterized in that The vibration direction of the first vibration is the same as the first direction of the liquid flow velocity.

9. The method according to claim 8, characterized in that The device further includes a solenoid valve, the flow meter is fixedly connected to the solenoid valve via a fourth connecting pipe, and the fourth connecting pipe is connected to the second connecting pipe. The method further comprises: The vibration speed generated by the first vibration and the switch of the electromagnetic valve are adjusted to change the magnitude of the liquid flow speed, thereby generating a force on the flow meter to flush the impeller of the flow meter.

10. The method according to claim 9, characterized in that The adjusting of the vibration speed generated by the first vibration and the opening and closing of the electromagnetic valve includes: increasing the vibration speed generated by the first vibration and opening the electromagnetic valve, so that the acceleration generated by the change in the liquid flow speed is greater than 0.

11. The method according to claim 9, characterized in that The adjusting of the vibration speed generated by the first vibration and the opening and closing of the electromagnetic valve includes: reducing the vibration speed generated by the first vibration and opening the electromagnetic valve, or, The water pump motor is stopped and the solenoid valve is opened so that the acceleration generated by the change in the liquid flow velocity is less than 0.

12. The method according to any one of claims 9 to 11, characterized in that The solenoid valve controls the switch via a remote control device.

13. A computer-readable storage medium, characterized in that The invention comprises a computer program which, when executed on a computer device, causes a processing unit in the computer device to execute the method according to any one of claims 7 to 12.

14. A computer program product, characterized in that The method comprises computer program instructions which, when executed on a computer device, cause a processing unit in the computer device to execute the method according to any one of claims 7 to 12.

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