A water pump adjustable flow sensor

Abstract

The present invention relates to the field of sensor technology, and specifically to an adjustable flow sensor for a water pump, comprising a tube body, a rotating mechanism, an elastic mechanism, a detection mechanism and a control mechanism; the rotating mechanism is rotatably installed inside the tube body; the elastic mechanism is fixedly installed inside the tube body, and the elastic mechanism is located on one side of the rotating mechanism; the detection mechanism is fixedly installed on the outer surface of the tube body; the detection mechanism is electrically connected to the control mechanism. The present invention solves the problem of existing adjustable flow sensors for water pumps, in which impurities or scale in the water flow accumulate on the inner wall of the pipe during long-term use, causing the impeller inside the pipe to become stuck and clogged. The present invention ensures that the impeller inside the pipe will not be stuck or clogged by impurities or scale, thereby improving the detection accuracy and service life and ensuring the accuracy of the detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to an adjustable flow sensor for a water pump. Background Art

[0002] An adjustable flow sensor for water pumps is a device used to measure pump flow. It can be installed at the pump's inlet or outlet and calculates flow by measuring the velocity or volume of the fluid passing through it. Adjustable flow sensors can be used with various types of pumps, including centrifugal, axial, and vortex pumps.

[0003] Adjustable flow sensors for water pumps can be used in various fields. For example, when residents use water, they need to pump water from the ground to higher floors through water pumps. During the pumping process, the adjustable flow sensor for water pumps is needed to detect the water flow inside the pipe in real time, thereby adjusting the pumping power so that the water can flow to higher floors.

[0004] In the existing water pump adjustable flow sensor, when in use, since the tap water contains certain impurities, although the tap water will undergo initial filtration when entering the water pump, the water pump cannot completely filter out the impurities, so that the water flowing into the pipe still contains smaller impurities. When the tap water flows through the flow sensor, the impeller inside the sensor is driven to rotate, thereby detecting the flow rate of the water. However, during long-term use, the smaller impurities and scale in the water will accumulate inside the flow sensor, making the impeller inside the sensor unable to rotate, causing the impeller to get stuck or clogged, resulting in the flow sensor being unable to continue to work normally and being damaged, making the flow sensor detection results inaccurate, and the iron sand in the water flow will slowly accumulate on the outer wall of the check valve under the magnetic force of the magnetic ring, causing it to get stuck and clogged. When used in a strong magnetic field environment, the external magnetic field will affect the magnetic ring inside the sensor, causing the magnetic field inside the flow sensor to be disordered, resulting in reduced detection accuracy of the flow sensor, and in serious cases, it will cause the flow sensor to fail, reducing the service life of the flow sensor.

[0005] To this end, the prior art has provided some solutions, such as the Chinese invention patent: (CN201520457120.4, publication date: 2015-10-28) which discloses a flow sensor, including a sensor seat and a check valve. The lower side of the sensor seat has a downwardly extending guide portion, the check valve is sleeved on the guide portion and can move up and down along the guide portion, a reed switch and a circuit board are provided in the guide portion, the check valve is provided with a magnetic ring, and a spring is provided between the sensor seat and the check valve for resetting the check valve when the check valve rises to a certain position. The check valve is provided with a high-permeability magnetic ring for cutting off the magnetic lines of force generated by the outer ring of the magnetic ring. The check valve is also provided with an anti-detachment structure for preventing the magnetic ring and the high-permeability magnetic ring from falling off. This invention prevents iron sand in the water flow from being attracted by the magnetic force of the magnetic ring by cutting off the magnetic lines of force generated by the outer ring of the magnetic ring by the high-permeability magnetic ring, causing jamming and clogging. However, this invention still does not reasonably solve the problem of impurities or scale in the water flow clogging the pipe.

[0006] In view of this, and in response to the above-mentioned deficiencies, the present invention designs an adjustable flow sensor for a water pump. Summary of the Invention

[0007] The technical problem to be solved by the present invention is that during long-term use of the existing adjustable flow sensor for water pumps, impurities or scale in the water flow will accumulate on the inner wall of the pipe, causing the impeller inside the pipe to become stuck and blocked.

[0008] The present invention provides the following technical solution: a water pump adjustable flow sensor, comprising a tube body, a rotating mechanism, an elastic mechanism, a detection mechanism and a control mechanism; a rotating mechanism is rotatably installed inside the tube body, and the rotating mechanism is used to convert the kinetic energy of the water flow into the kinetic energy of the rotating mechanism, so that the rotating mechanism performs linear motion while rotating; an elastic mechanism is fixedly installed inside the tube body, and the elastic mechanism is located on one side of the rotating mechanism, and the elastic mechanism is used to reset the moving rotating mechanism through the elastic mechanism, and the specific installation method adopts bolt connection.

[0009] A detection mechanism is fixedly installed on the outer surface of the tube body, and the detection mechanism is used to detect the rotation speed of the rotating mechanism and convert the speed change of the rotating mechanism into a change in the waveform, so as to judge the flow rate of the water. The specific installation method can be connected by bolt connection or welding; the detection mechanism is electrically connected to the control mechanism; the control mechanism controls the start and operation of the detection mechanism; the diameter of the tube body is between 20-60mm, the length of the tube body is between 80-130mm, and the tube body can be made of stainless steel or carbon steel. Carbon steel has high strength and good corrosion resistance, and the price is relatively low. The tensile strength is between 400MPa and 1000MPa; the yield strength is between 200MPa and 800MPa; the elongation is between 15% and 25%; the impact toughness is able to absorb 20J / cm2 —60J / cm 2 Energy between; hardness: between 150HB and 300HB.

[0010] The rotating mechanism includes a spiral element and a swivel assembly; the swivel assembly is fixedly mounted on one end of the spiral element, and the swivel assembly is fixedly mounted on the other end of the spiral element. The specific installation method can be bolt connection or welding. The spiral element is made of engineering plastics, such as polyurethane, polyamide and polypropylene. These materials have excellent corrosion resistance and high strength, as well as good processing performance and lightweight characteristics. Polypropylene is preferred, with a density of 0.90g / cm 3 —0.92g / cm 3 melting point: between 130°C and 171°C; tensile strength: between 20MPa and 40MPa; elongation: between 300% and 700%; moisture absorption rate: less than 0.01%; the diameter of the spiral element is between 0.5 and 10mm.

[0011] The elastic mechanism includes an elastic element and a circular ring; the elastic element is fixedly installed on the circular ring, and the circular ring is located on one side of the rotating mechanism. The specific installation method can be bolt connection or welding; an arc-shaped groove is opened on one side of the circular ring; the elastic element can be a spring or an airbag; the circular ring is made of stainless steel material, and its tensile strength is between 500MPa and 2000MPa; the yield strength is between 200MPa and 1500MPa; the elongation is between 10% and 50%; and the hardness is between 70 and 200.

[0012] The detection mechanism includes a Hall element, a circuit element and a magnetic isolation element; the Hall element is fixedly mounted on the circuit element, the magnetic isolation element is fixedly mounted on the circuit element, and both the Hall element and the circuit element are located inside the magnetic isolation element, and are specifically installed by welding; the operating temperature range of the Hall element is between -40 and +150°C, the Hall element is located in the middle of the tube body, and the distance between the Hall element and the two ends of the tube body is between 20 and 35 mm; the magnetic isolation element can be made of lead magnesium titanate (PLT) material, the piezoelectric coefficient of PLT varies with temperature and the molar fraction of titanium, and is generally between 50 and 200 at room temperature, wherein the maximum piezoelectric coefficient occurs when the molar fraction of titanium is about 0.18; the coercive force of PLT is generally between 0.2 and 1.0 kV / cm at room temperature; the hardness of PLT is between 5.5 and 6.5 Mohs, the specific strength is between 200 and 300 MPa; and the bending strength is between 150 and 200 MPa.

[0013] The attack angle of the spiral element is set between 10-20 degrees, and the pitch of the spiral element is set between 1-3 spiral diameters; the pitch of the spiral element is between 1.5-30 mm; the attack angle of the spiral element is between 10-20 degrees to obtain the maximum reaction force of the water flow, and the length of the spiral element is between 40-65 mm.

[0014] The swivel assembly includes a ring element and a blade element; the blade element is fixedly installed inside the ring element, and the specific installation method can be bolt connection or welding; the blade element is made of engineering plastics, such as polyurethane, polyamide and polypropylene, which have excellent corrosion resistance and high strength, as well as good processing performance and lightweight characteristics. Polyurethane is preferred, with a density of 1.1-1.3g / cm 3 melting point: 170-220℃; tensile strength: 10-60MPa; hardness: 40A-85D.

[0015] The deflection angle of the blade element is between 18 and 25 degrees, which can achieve the best rotation efficiency of the blade element, and the deflection angle direction of the blade element is consistent with that of the spiral element; the number of the blade elements is between 2 and 4; and the length of the blade element is between 9 and 20 mm.

[0016] The ring element is provided with a movably mounted rolling ball; the rolling ball is made of carbon steel, and the coefficient of kinetic friction of the rolling ball in water is between 0.0015 and 0.0023; the carbon steel material has high strength and good corrosion resistance, and is relatively inexpensive, with a tensile strength of 400 MPa to 1000 MPa, a yield strength of 200 MPa to 800 MPa, an elongation of 15% to 25%, and an impact toughness of 20 J / cm 2 —60J / cm 2 The energy is between 150HB and 300HB; the hardness is between 150HB and 300HB; the diameter of the rolling ball is between 0.2 and 0.4mm, and the distance between two adjacent rolling balls is between 0.2 and 0.3mm.

[0017] Limiting rings are fixedly installed on the left and right ends of the inner wall of the tube body. The distance between the limiting rings is between 1.5 and 2 times the length of the spiral element. The specific installation method can be bolt connection or welding. The limiting rings can be made of stainless steel or carbon steel; stainless steel is preferred, and its tensile strength is between 500MPa and 2000MPa; yield strength is between 200MPa and 1500MPa; elongation is between 10% and 50%; and hardness is between 70 and 200.

[0018] Multiple magnetic blocks are fixedly installed on the ring element. The magnetic properties of multiple adjacent magnetic blocks are different. The specific installation method adopts bolt connection. The magnetic blocks can use neodymium iron boron or cobalt hard magnetic materials as magnetic blocks, and the magnetic blocks are permanent magnets, preferably neodymium iron boron, with a coercive force between 1000-1500kA / m; magnetic permeability between 1.1-1.2; temperature coefficient between -0.1--0.05% / ℃.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention is provided with a rotating mechanism. Through the pressure difference of water flow inside the pipe body and the impact force of the water flow, the rotating mechanism also performs linear motion during the rotation process, thereby preventing the pipe body from being stuck by debris or scale, avoiding clogging of the pipe body, and ensuring the accuracy of the detection result; by providing an elastic mechanism, the rotating mechanism can return to its original position according to the flow rate of water flow and the pressure difference of water flow, thereby preventing debris from getting stuck and clogging the pipe body, and also assisting in cleaning the debris inside the pipe body, and carrying away the debris through the eddy current formed by the rotation; by providing a magnetic isolation element on the detection mechanism, the strong magnetic field outside the pipe body can be isolated to prevent interference from the external magnetic field, which causes disorder of the magnetic field inside the pipe body, thereby improving detection accuracy and service life.

[0021] 2. The present invention installs a rotating mechanism in the tube body. Through the pressure difference of the water flow inside the tube body and the impact force of the water flow, the rotating mechanism can rotate around its own axis inside the cabinet under the action of the water flow while also moving in the opposite direction of the water flow, thereby preventing the tube body from being stuck by debris or scale, avoiding blockage of the tube body, and ensuring the accuracy of the test results.

[0022] 3. The present invention is provided with an elastic mechanism. Through the movement of the elastic mechanism, the rotating mechanism can make a reciprocating linear motion inside the pipe body according to the flow rate of the water flow and the pressure difference of the water flow, so as to prevent debris from getting stuck and clogging the inside of the pipe body. At the same time, it can also assist in cleaning the debris and scale inside the pipe body, and carry away the debris and scale through the vortex formed by the rotation.

[0023] 4. The present invention can isolate the strong magnetic field outside the pipe body by installing a magnetic isolation element on the detection mechanism, preventing the external magnetic field from interfering with the detection of the internal Hall element, avoiding the magnetic field inside the pipe body from being disordered, and improving the detection accuracy and service life of the flow sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 A top view of the present invention;

[0027] Figure 3 is a side view of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the tube body of the present invention;

[0029] Figure 5 Schematic diagram of the three-dimensional structure of the magnetic isolation element of the present invention;

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the internal structure of the tube body of the present invention;

[0031] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention;

[0032] Figure 8 is a schematic diagram of the three-dimensional structure of the swivel assembly of the present invention;

[0033] Figure 9 is a schematic diagram of the three-dimensional structure of the elastic mechanism of the present invention;

[0034] Figure 10 It is a cross-sectional view of the present invention.

[0035] In the figure: 1. Tube body; 11. Limiting ring; 2. Rotating mechanism; 21. Spiral element; 22. Rotating ring assembly; 221. Ring element; 222. Blade element; 223. Rolling ball; 224. Magnetic block; 3. Elastic mechanism; 31. Elastic element; 32. Circular ring; 33. Arc groove; 4. Detection mechanism; 41. Hall element; 42. Circuit element; 43. Magnetic isolation element. DETAILED DESCRIPTION

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] Example 1: When the water flow speed is between 5m / s and 10m / s, the water flow will form a pressure difference inside the tube body 1. The pressure at the water inlet of the tube body 1 is greater than the pressure at the water outlet, forming a pressure difference. When the pressure difference is greater than the elastic potential energy of the elastic mechanism 3, the spiral element 21 is impacted by the water, and the force in the opposite direction of the water flow is greater than the elastic potential energy of the elastic mechanism 3. Under the flow of water, the swivel assembly 22 and the spiral element 21 on the rotating mechanism 2 will be impacted by the water flow. With the impact of the water flow, the rotating element rotates and moves in the opposite direction of the water flow. During the rotation and movement of the rotating element, the elastic element 31 on the elastic mechanism 3 will be compressed. At the same time, the Hall element 41 on the detection mechanism 4 detects the rotation speed of the rotating mechanism 2 in real time, and obtains a waveform diagram through the changing frequency of the magnetic field generated by the magnetic block 224 on the swivel assembly 22, and finally outputs the water flow rate.

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, a water pump adjustable flow sensor includes a tube body 1, a rotating mechanism 2, an elastic mechanism 3, a detection mechanism 4 and a control mechanism; the rotating mechanism 2 is rotatably installed inside the tube body 1, and the rotating mechanism 2 is used to convert the kinetic energy of the water flow into the kinetic energy of the rotating mechanism 2, so that the rotating mechanism 2 rotates and performs linear motion at the same time; the elastic mechanism 3 is fixedly installed inside the tube body 1, and the elastic mechanism 3 is located on one side of the rotating mechanism 2, and the elastic mechanism 3 is used to reset the moving rotating mechanism 2 through the elastic mechanism 3, and the specific installation method adopts bolt connection.

[0039] A detection mechanism 4 is fixedly mounted on the outer surface of the tube body 1. The detection mechanism 4 is used to detect the rotation speed of the rotating mechanism 2 and convert the speed change of the rotating mechanism 2 into a waveform change, thereby determining the flow rate of the water. The specific installation method adopts a bolt connection; the detection mechanism 4 is electrically connected to the control mechanism; the control mechanism controls the start and operation of the detection mechanism 4; the tube body 1 is specifically made of carbon steel, which has high strength and good corrosion resistance and is relatively inexpensive. The tensile strength is between 400MPa and 1000MPa; the yield strength is between 200MPa and 800MPa; the elongation is between 15% and 25%; and the impact toughness can absorb 20J / cm 2 —60J / cm 2 Energy between; hardness: between 150HB and 300HB.

[0040] When water flows through the pipe body 1, the water flow will form a pressure difference inside the pipe body 1. The pressure at the water inlet of the pipe body 1 is greater than the pressure at the water outlet, forming a pressure difference, and the pressure difference is greater than the elastic potential energy of the elastic mechanism 3. Under the flow of water, the rotating mechanism 2 will be impacted by the water flow, causing the rotating mechanism 2 to rotate and move along the direction of the water flow, from the low-pressure area to the high-pressure area. At the same time, the elastic mechanism 3 will be compressed due to the rotation of the rotating mechanism 2. During the rotation and movement of the rotating mechanism 2, the detection mechanism 4 detects the rotation speed of the rotating mechanism 2 in real time, and converts the rotation speed of the rotating mechanism 2 into a waveform through the control mechanism, and finally outputs the flow rate inside the pipe body 1.

[0041] When the pressure difference between the water inlet and the water outlet of the tube body 1 is smaller than the elastic potential energy of the elastic mechanism 3 , the rotating mechanism 2 can only rotate under the impact of the water flow and will not move.

[0042] like Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, the rotating mechanism 2 includes a spiral element 21 and a swivel assembly 22; the swivel assembly 22 is fixedly installed at one end of the spiral element 21, and the swivel assembly 22 is fixedly installed at the other end of the spiral element 21, and the specific installation method is to connect by welding; the spiral element 21 is used to rotate and move under the impact of the water flow to prevent impurities or scale in the water from getting stuck and blocked; the conversion assembly is used to support the spiral element 21 and fix the spiral element 21 at the axial position of the tube body 1 so that the spiral line can move along the axis of the tube body 1; the spiral element 21 is made of polypropylene material with a density of 0.90g / cm 3 —0.92g / cm 3 melting point: between 130 ℃ -171 ℃; tensile strength: between 20MPa-40MPa; elongation: between 300% -700%; moisture absorption rate: less than 0.01%; the diameter of the spiral element 21 is between 0.5-10mm.

[0043] When the water flow first hits the swivel assembly 22, the swivel assembly 22 tends to rotate inside the pipe body 1. As the water flow hits the spiral element 21, the spiral element 21 and the swivel assembly 22 rotate, causing the entire rotating mechanism 2 to rotate. During the rotation of the spiral element 21, the spiral element 21 has an axial force, causing the spiral element 21 to move toward the water outlet end of the pipe body 1, preventing the rotating mechanism 2 from being stuck, thereby causing the detection mechanism 4 to be unable to detect the flow inside the pipe body 1.

[0044] like Figure 6 、 Figure 9 and Figure 10As shown, the elastic mechanism 3 includes an elastic element 31 and a ring 32; the elastic element 31 is fixedly mounted on the ring 32, and the ring 32 is located on one side of the rotating mechanism 2, and the specific installation method is to connect by welding; an arc-shaped groove 33 is provided on one side of the ring 32; the elastic element 31 is used to drive the reset of the rotating mechanism 2, and the ring 32 is used to support the elastic element 31 to prevent the elastic element 31 from rotating and deforming during the rotation of the rotating mechanism 2.

[0045] The elastic element 31 is a spring made of titanium alloy. Titanium alloy has the characteristics of low density, high strength, excellent corrosion resistance and thermal stability. The density of lightweight spring titanium alloy is relatively low, generally 4.4-4.5g / cm 3 Compared with traditional spring steel (7.8g / cm 3 ) and stainless steel (7.9g / cm 3 ) and other materials are lighter; the strength of lightweight spring titanium alloy is relatively high, generally between 900-1300MPa, which is equivalent to or higher than high-strength steel, but the density is about 40% lower than that of steel; the elastic modulus of lightweight spring titanium alloy is generally between 90-110GPa; lightweight spring titanium alloy has excellent corrosion resistance and can resist corrosion from media such as acid, alkali, and seawater, and is suitable for occasions working in harsh environments.

[0046] When the pressure difference between the water inlet and the water outlet of the tube body 1 is less than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, the elastic element 31 will reset the rotating mechanism 2 through the elastic potential energy, push the ring 32 to move through the elastic element 31, and the ring 32 pushes the rotating mechanism 2 to move. During the resetting process, the rotating mechanism 2 always rotates under the impact of the water flow.

[0047] like Figure 5 and Figure 10 As shown, the detection mechanism 4 includes a Hall element 41, a circuit element 42 and a magnetic isolation element 43; the Hall element 41 is fixedly mounted on the circuit element 42, the magnetic isolation element 43 is fixedly mounted on the circuit element 42, and the Hall element 41 and the circuit element 42 are both located inside the magnetic isolation element 43, and the specific installation method is to connect them by welding; the Hall element 41 is used to detect the rotation speed of the rotating mechanism 2; the circuit element 42 is used to electrically connect the Hall element 41; the magnetic isolation element 43 is used to isolate the external magnetic field to prevent the external magnetic field from interfering with the interior of the tube body 1, resulting in inaccurate detection results.

[0048] When water flows through the tube body 1, the rotating mechanism 2 inside the tube body 1 rotates under the impact of the water flow and moves along the axis. The rotation speed of the rotating mechanism 2 varies depending on the water pressure of the water flow. The Hall element 41 on the detection mechanism 4 detects the rotation speed of the rotating mechanism 2, and the signal is transmitted to the control mechanism through the circuit element 42. The control mechanism then analyzes and processes the signal to finally determine the water flow rate inside the tube body 1.

[0049] The angle of attack of the spiral element 21 is set between 10-20°, and the pitch of the spiral element 21 is set between 1-3 spiral diameters. The angle of attack of the spiral element 21 is set between 10-20° so that the rotation speed and the movement speed of the spiral element 21 can reach the optimal state when the spiral element 21 is subjected to minimum resistance; the pitch of the spiral element 21 is set between 1-3 spiral diameters so that the rotation speed and the movement speed of the spiral element 21 can reach the optimal state when the spiral element 21 is subjected to minimum resistance. By setting the angle of attack and the pitch of the spiral element 21 to the optimal range value, it is ensured that the spiral element 21 can move under the impact of the water flow, thereby preventing debris or scale in the water from clogging or jamming the rotating mechanism 2, resulting in inaccurate flow detected by the detection mechanism 4.

[0050] like Figure 6 、 Figure 7 、 Figure 8 and Figure 10 As shown, the swivel assembly 22 includes a ring element 221 and a blade element 222; the blade element 222 is fixedly installed inside the ring element 221, and the specific installation method is to connect by welding. The ring element is used to support the spiral element 21 while also being able to rotate and move on the inner wall of the tube body 1. The blade element 222 is used to convert the impact force of the water flow into the rotational power of the swivel assembly 22, and also improves the efficiency of the spiral rotation; the blade element 222 is made of polyurethane material, and its density is: 1.1-1.3g / cm 3 melting point: 170-220℃; tensile strength: 10-60MPa; hardness: 40A-85D.

[0051] When the pressure difference between the water inlet and the water outlet of the tube body 1 is less than the elastic potential energy of the elastic mechanism 3, the swivel assembly 22 on the rotating mechanism 2 can only rotate under the impact of the water flow, and the rotational force of the spiral element 21 is less than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, and will not move. This ensures that the rotating mechanism 2 can still rotate when the water pressure is low, and the flow rate inside the tube body 1 can be accurately detected by the detection mechanism 4.

[0052] The deflection angle of the blade element 222 is between 18 and 25 degrees, which can optimize the rotation efficiency of the blade element 222, and the deflection angle direction of the blade element 222 is consistent with that of the spiral element 21. The deflection angle of the blade element 222 is between 18 and 25 degrees so that the rotation speed of the swivel assembly 22 can reach the optimal state when it is subjected to minimum resistance, and the deflection angle direction of the blade element 222 is consistent with that of the spiral element 21 so that the swivel assembly 22 and the spiral element 21 can cooperate with each other and assist each other in rotation.

[0053] like Figure 7 and Figure 10 As shown, a rolling ball 223 is movably mounted on the ring element 221; the rolling ball 223 is made of carbon steel material, and the dynamic friction coefficient of the rolling ball 223 in water is between 0.0015 and 0.0023; the rolling ball 223 is intended to ensure that the friction force experienced by the swivel assembly 22 is minimized during rotation, reduce the resistance of the rotating mechanism 2 during rotation, improve the rotation efficiency of the rotating mechanism 2, and also reduce the wear rate of the rotating mechanism 2, thereby increasing the service life of the rotating mechanism 2. The rolling ball 223 is made of carbon steel material to prevent the rolling ball 223 from being corroded and damaged by water during long-term use. At the same time, the dynamic friction coefficient of the rolling ball 223 made of carbon steel is small, which can reduce most of the resistance experienced by the rotating mechanism 2 during rotation.

[0054] like Figure 10 As shown, limit rings 11 are fixedly installed on the left and right ends of the inner wall of the tube body 1. The distance between the limit rings 11 is between 1.5 and 2 times the length of the spiral element 21. The specific installation method adopts bolt connection. The limit rings 11 are used to limit the distance that the rotating mechanism 2 moves along the axis. The distance between the limit rings 11 is between 1.5 and 2 times the length of the spiral element 21 to ensure that the Hall element 41 on the detection mechanism 4 can detect the rotation of the rotating mechanism 2 in real time during the rotation and movement of the rotating mechanism 2, and determine the flow inside the tube body 1.

[0055] When the rotating mechanism 2 is rotating, as the rotating mechanism 2 moves, the detection mechanism 4 detects the rotation of the rotating mechanism 2 in real time, and the Hall element 41 on the detection mechanism 4 does not need to move, and the sum of the length of the spiral element 21 on the rotating mechanism 2 and the length of the elastic element 31 on the elastic mechanism 3 is equal to the distance between the limit rings 11; the limit rings 11 are made of stainless steel, and their tensile strength is between 500MPa and 2000MPa; yield strength is between 200MPa and 1500MPa; elongation is between 10% and 50%; and hardness is between 70 and 200.

[0056] like Figure 10As shown, a plurality of magnetic blocks 224 are fixedly mounted on the ring element 221, and the magnetic properties of the plurality of adjacent magnetic blocks 224 are different. The specific mounting method adopts bolt connection. The plurality of magnetic blocks 224 are fixedly mounted on the ring element 221 in order to detect the rotation speed of the rotating mechanism 2 through the Hall element 41 on the outer surface of the tube body 1. When the water flow impacts the rotating mechanism, the rotating mechanism 2 rotates and moves along the axis. At the same time, the plurality of magnetic blocks 224 on the ring element 221 rotates as the ring element 221 rotates. The frequency of the change of the magnetic field of the rotating mechanism 2 during rotation is detected by the Hall element 41, and the change of the magnetic field is transmitted to the control mechanism through the circuit element 42 through the Hall element 41, and then divided into and processed into a waveform diagram, and finally the size of the flow inside the tube body 1 is calculated.

[0057] During operation, when water flows through the pipe body 1 and the water flow speed is between 5m / s and 10m / s, the water flow will form a pressure difference inside the pipe body 1. The pressure at the water inlet of the pipe body 1 is greater than the pressure at the water outlet, forming a pressure difference. When the pressure difference is greater than the elastic potential energy of the elastic mechanism 3, the force of the spiral element 21 in the opposite direction of the water flow under the impact of water is greater than the elastic potential energy of the elastic mechanism 3. Under the flow of water, the swivel assembly 22 on the rotating mechanism 2 will be impacted by the water flow, and the blade element 222 on the swivel assembly 22 will drive the ring element 221 to rotate with the impact of the water flow. At the same time, the spiral element 21 will also rotate with the impact of the water flow. Moreover, while the rotating mechanism 2 rotates, it also moves in the opposite direction of the water flow and compresses the elastic element 31 on the elastic mechanism 3.

[0058] While the rotating mechanism 2 rotates, the rolling ball 223 on the ring element 221 will roll on the ring 32 on the elastic mechanism 3. As the rotating mechanism 2 rotates and moves, the multiple magnetic blocks 224 on the ring element 221 rotate with the rotation of the ring element 221. When the rotating mechanism 2 moves to the limit ring 11, it will stop moving, but the rotation will continue. The Hall element 41 on the detection mechanism 4 detects the frequency of change of the magnetic field when the rotating mechanism 2 rotates, and the change of the magnetic field is transmitted to the control mechanism through the circuit element 42 through the Hall element 41, and then processed into a waveform diagram, and finally the size of the flow inside the tube body 1 is calculated.

[0059] When the pressure difference between the water inlet and the water outlet of the tube body 1 is less than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, the elastic element 31 will reset the rotating mechanism 2 through the elastic potential energy, and push the ring 32 to move through the elastic element 31, and the ring 32 pushes the rotating mechanism 2 to move. In the reset process, the rotating mechanism 2 always rotates under the impact of the water flow. During this process, the Hall element 41 detects the changes in the magnetic field of the magnetic block 224 on the rotating mechanism 2 in real time, and transmits the changes in the magnetic field to the control mechanism through the circuit element 42.

[0060] When the pressure difference between the water inlet and outlet of the pipe body 1 is always smaller than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, the force of the spiral element 21 in the opposite direction of the water flow under the impact of water is smaller than the elastic potential energy of the elastic mechanism 3. The blade element 222 on the rotating mechanism 2 drives the ring element 221 to rotate under the impact of the water flow, thereby driving the rotating mechanism 2 to rotate. At the same time, the spiral element 21 will also rotate under the impact of the water flow. The force of the spiral element 21 in the opposite direction of the water flow is smaller than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, and will not move. The Hall element 41 on the detection mechanism 4 detects the frequency of the magnetic field change when the rotating mechanism 2 rotates, and the change in the magnetic field is transmitted to the control mechanism through the circuit element 42 through the Hall element 41, and then processed into a waveform diagram, and finally the size of the flow rate inside the pipe body 1 is calculated.

[0061] When the pressure difference between the water inlet and outlet of the pipe body 1 is greater than the elastic potential energy of the elastic element 31 on the elastic mechanism 3, the force of the spiral element 21 in the opposite direction of the water flow under the impact of water is greater than the elastic potential energy of the elastic mechanism 3. The blade element 222 on the rotating mechanism 2 drives the ring element 221 to rotate under the impact of the water flow, thereby driving the rotating mechanism 2 to rotate. At the same time, the spiral element 21 will also rotate under the impact of the water flow. However, the impact force of the water flow is much greater than the force of the spiral element 21 in the opposite direction of the water flow, and overcomes and offsets the force of the spiral element 21 in the opposite direction of the water flow, so the rotating mechanism 2 will not move. The Hall element 41 on the detection mechanism 4 detects the frequency of the magnetic field change when the rotating mechanism 2 rotates, and the change in the magnetic field is transmitted to the control mechanism through the circuit element 42 through the Hall element 41, and then processed into a waveform diagram, and finally the flow rate inside the pipe body 1 is calculated.

[0062] Example 2: When the water flow velocity is below 5m / s, the pressure difference formed by the water flow inside the tube body 1 is smaller than the elastic potential energy of the elastic mechanism 3, so that the force of the spiral element 21 in the opposite direction of the water flow under the impact of the water is smaller than the elastic potential energy of the elastic mechanism 3. Under the flow of water, the swivel assembly 22 and the spiral element 21 on the rotating mechanism 2 will be impacted by the water flow. With the impact of the water flow, the rotating element cannot move in the opposite direction of the water flow during the rotation process, and the rotating mechanism 2 can only rotate in place. At the same time, the Hall element 41 on the detection mechanism 4 detects the rotation speed of the rotating mechanism 2 in real time, and obtains a waveform diagram through the changing frequency of the magnetic field generated by the magnetic block 224 on the swivel assembly 22, and finally outputs the water flow rate.

[0063] Example 3: When the water flow speed is above 10m / s, the pressure difference formed by the water flow inside the tube body 1 is greater than the elastic potential energy of the elastic mechanism 3, so that the force of the spiral element 21 in the opposite direction of the water flow under the impact of water is greater than the elastic potential energy of the elastic mechanism 3, but the impact force of the water flow is much greater than the force of the spiral element 21 in the opposite direction of the water flow, and overcomes and offsets the force of the spiral element 21 in the opposite direction of the water flow, so under the flow of water, the swivel assembly 22 and the spiral element 21 on the rotating mechanism 2 will be impacted by the water flow. With the impact of the water flow, the rotating element cannot move in the opposite direction of the water flow during the rotation process, and the rotating mechanism 2 can only rotate in place. At the same time, the Hall element 41 on the detection mechanism 4 detects the rotation speed of the rotating mechanism 2 in real time, and obtains a waveform diagram through the changing frequency of the magnetic field generated by the magnetic block 224 on the swivel assembly 22, and finally outputs the water flow rate.

[0064] The basic principles, main features and advantages of the present invention are shown and described above. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water pump adjustable flow sensor, comprising a tube body (1), a rotating mechanism (2), an elastic mechanism (3), a detection mechanism (4) and a control mechanism; characterized in that: A rotating mechanism (2) is rotatably mounted inside the tube body (1), and the rotating mechanism (2) is used to convert the kinetic energy of the water flow into the kinetic energy of the rotating mechanism (2), so that the rotating mechanism (2) performs linear motion during the rotation process; an elastic mechanism (3) is fixedly mounted inside the tube body (1), and the elastic mechanism (3) is located on one side of the rotating mechanism (2), and the elastic mechanism (3) is used to reset the moving rotating mechanism (2) through the elastic mechanism (3); a detection mechanism (4) is fixedly mounted on the outer surface of the tube body (1), and the detection mechanism (4) is used to detect the rotation speed of the rotating mechanism (2), and convert the speed change of the rotating mechanism (2) into the change of the waveform, thereby judging the flow rate of the water; the detection mechanism (4) is electrically connected to the control mechanism.

2. The adjustable flow sensor for a water pump according to claim 1, characterized in that: The rotating mechanism (2) comprises a spiral element (21) and a swivel assembly (22); the swivel assembly (22) is fixedly mounted on one end of the spiral element (21), and the swivel assembly (22) is fixedly mounted on the other end of the spiral element (21).

3. The adjustable flow sensor for a water pump according to claim 1, characterized in that: The elastic mechanism (3) comprises an elastic element (31) and a circular ring (32); the elastic element (31) is fixedly mounted on the circular ring (32), and the circular ring (32) is located on one side of the rotating mechanism (2); an arc-shaped groove (33) is provided on one side of the circular ring (32).

4. The adjustable flow sensor for a water pump according to claim 1, characterized in that: The detection mechanism (4) comprises a Hall element (41), a circuit element (42) and a magnetic isolation element (43); the Hall element (41) is fixedly mounted on the circuit element (42), the magnetic isolation element (43) is fixedly mounted on the circuit element (42), and both the Hall element (41) and the circuit element (42) are located inside the magnetic isolation element (43).

5. The adjustable flow sensor for a water pump according to claim 2, characterized in that: The attack angle of the spiral element (21) is set between 10 and 20 degrees, and the pitch of the spiral element (21) is set between 1 and 3 spiral diameters.

6. The adjustable flow sensor for a water pump according to claim 2, characterized in that: The rotating ring assembly (22) comprises a ring element (221) and a blade element (222); the blade element (222) is fixedly installed inside the ring element (221).

7. The adjustable flow sensor for a water pump according to claim 6, characterized in that: The deflection angle of the blade element (222) is between 18 and 25 degrees, which can achieve the best rotation efficiency of the blade element (222), and the deflection angle direction of the blade element (222) is consistent with that of the spiral element (21).

8. The adjustable flow sensor for a water pump according to claim 6, characterized in that: A rolling ball (223) is movably mounted on the ring element (221); the rolling ball (223) is made of carbon steel material, and the dynamic friction coefficient of the rolling ball (223) in water is between 0.0015 and 0.0023.

9. The adjustable flow sensor for a water pump according to claim 1, characterized in that: Limiting rings (11) are fixedly installed on the left and right ends of the inner wall of the tube body (1), and the distance between the limiting rings (11) is between 1.5 and 2 times the length of the spiral element (21).

10. The adjustable flow sensor for a water pump according to claim 6, characterized in that: A plurality of magnetic blocks (224) are fixedly mounted on the ring element (221), and the magnetic properties of the plurality of adjacent magnetic blocks (224) are different.

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