Flow detection device and method for water supply system

Abstract

The present invention relates to the technical field of water supply flow detection, and specifically discloses a flow detection device and method for a water supply system, comprising: an outer tube and a magnetoelectric sensor, wherein the magnetoelectric sensor is arranged at the middle of the top of the outer wall of the outer tube, and the bottom end of the magnetoelectric sensor extends into the inner cavity of the outer tube; a polyvinyl fluoride inner tube is arranged in the inner cavity of the outer tube, and the bottom end of the magnetoelectric sensor extends into the inner cavity of the polyvinyl fluoride inner tube. The device realizes the instant braking of the turbine blades in the turbine flowmeter after the water supply system stops supplying water, effectively eliminating the flow detection error caused by the inertial rotation of the turbine blades after the water flow is interrupted, which not only ensures the real-time and accuracy of the flow data, provides a reliable decision-making basis for the managers of the water supply system, but also avoids the problems of resource waste and cost calculation errors caused by mismeasurement of flow, ensures the stable operation of the water supply system and the legitimate rights and interests of users, and further optimizes the reasonable allocation and utilization of water resources.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply flow detection, and in particular to a flow detection device and method for a water supply system. Background Art

[0002] As an important part of urban infrastructure, the water supply system is responsible for the stable and safe supply of water resources to residents, industry, agriculture and other fields. The system usually includes multiple links such as water sources, pumping stations, pipe networks, water storage facilities and end users. Its efficient operation is directly related to the sustainable development of social economy and the quality of people's lives. With the acceleration of urbanization and the increase in population density, higher requirements are placed on the monitoring and management of water supply systems, especially the accurate detection of flow, which has become one of the key technologies to ensure the stable operation of the system and optimize resource allocation.

[0003] Flow detection plays a pivotal role in the water supply system. First, it can help managers grasp the water supply in real time, ensure the balance between supply and demand, and avoid resource waste or shortage. Second, flow data is an important basis for evaluating system efficiency and diagnosing potential problems, which helps to take timely measures, reduce maintenance costs, and improve the overall performance of the system. In addition, accurate flow information is also crucial for water fee collection and water quality monitoring, which is directly related to the economic interests of users and the rational use of water resources.

[0004] In view of the importance of flow detection, a variety of flow detection technologies have emerged in the market. Among them, turbine flowmeters have been widely used in water supply systems due to their simple structure, wide measurement range, and high accuracy. The working principle of turbine flowmeters is based on the kinetic energy conversion of fluids. That is, when water flows through the turbine in the flowmeter, it drives the turbine blades to rotate. The rotation speed is proportional to the water flow speed. By measuring the rotation speed of the turbine and combining the geometric dimensions of the turbine and the fluid characteristics, the flow rate of the fluid can be calculated.

[0005] However, although turbine flowmeters have shown many advantages in flow detection in water supply systems, they still have defects that cannot be ignored in practical applications. Specifically, when it is necessary to stop the water supply or close the valve for maintenance, inspection and other operations, the water flow will be quickly interrupted. However, since the rotor of the turbine flowmeter has a certain mass and moment of inertia, even if the water flow has stopped, the rotor will continue to rotate for a period of time due to inertia. This phenomenon is called "inertial rotation". This inertial rotation will cause the flowmeter reading to continue to increase, while in fact the water flow has stopped, resulting in serious inaccuracy in flow detection. This inaccuracy not only misleads management decisions, but may also trigger a series of chain reactions such as uneven resource allocation and cost calculation errors, which will have an adverse impact on the stable operation of the water supply system and the interests of users. Summary of the invention

[0006] The object of the present invention is to provide a flow detection device and method for a water supply system to solve the problem of inaccurate detection results mentioned in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flow detection device for a water supply system, comprising: an outer tube and a magnetoelectric sensor, the magnetoelectric sensor is arranged at the middle of the top of the outer wall of the outer tube, and the bottom end of the magnetoelectric sensor extends into the inner cavity of the outer tube; a polyvinyl fluoride inner tube is arranged in the inner cavity of the outer tube, and the bottom end of the magnetoelectric sensor extends into the inner cavity of the polyvinyl fluoride inner tube, a first slide groove is opened at the left ends of the front and rear sides of the outer wall of the polyvinyl fluoride inner tube along the left and right directions, and a second slide groove is opened at the left ends of the front and rear sides of the inner wall of the polyvinyl fluoride inner tube along the left and right directions, and the position of the first slide groove corresponds to the position of the second slide groove; the left and right ends of the first guide rod are respectively arranged in the inner cavity of the first slide groove left and right sides; the left and right ends of the second guide rod are respectively arranged on the left and right sides of the inner cavity of the second slide groove; the monitoring mechanism is arranged on the left side of the inner cavity of the polyvinyl fluoride inner tube; the number of brackets is two, and the two brackets are respectively arranged on the left and right sides of the inner cavity of the polyvinyl fluoride inner tube; the left and right sides of the outer wall of the rotating rod are rotatably arranged in the middle of the inner cavity of the two brackets through bearings, and the right end of the rotating rod can be rotatably extended to the right side of the right bracket; the number of turbine blades is several, and the several turbine blades are respectively arranged in the middle of the outer wall of the rotating rod at equal distances along the circumferential direction, and the position of the turbine blades corresponds to the position of the magnetoelectric sensor; the braking mechanism is arranged on the right side of the inner cavity of the polyvinyl fluoride inner tube;

[0008] The braking mechanism comprises: a rotating disk, which is sleeved on the right side of the outer wall of the rotating rod and locked, and there is a gap between the outer wall of the rotating disk and the inner wall of the polyvinyl fluoride inner tube; there are a plurality of iron sheets, which are equidistantly arranged on the outer wall of the rotating disk along the circumferential direction, and the number of the iron sheets is an even number; there are two power-off type electromagnets, which are respectively arranged at the right ends of the front and rear sides of the outer wall of the polyvinyl fluoride inner tube, and the inner ends of the two power-off type electromagnets extend into the inner cavity of the polyvinyl fluoride inner tube, and the positions of the power-off type electromagnets correspond to the positions of the iron sheets.

[0009] Preferably, a limiting ring is provided on the right side of the inner wall of the polyfluoroethylene inner tube, the outer wall of the turntable is located in the inner cavity of the limiting ring, and there is a gap between the outer wall of the turntable and the inner wall of the limiting ring.

[0010] Preferably, in order to drive the slider to slide, the monitoring mechanism includes: a sliding plate, the front and rear ends of the sliding plate can be slidably adapted and inserted in the right part of the inner cavity of the two second sliding grooves, the inner cavity of the sliding plate can be slidably adapted and connected to the outer wall of the second guide rod, and the inner wall of the inner cavity of the sliding plate is provided with a plurality of first rolling grooves equidistantly along the circumferential direction; a water push hood is arranged in the middle part of the outer wall of the sliding plate; there are two first strong magnets, and the two first strong magnets are respectively arranged at the front and rear ends of the sliding plate; a spring is sleeved on the left side of the outer wall of the second guide rod, the left end of the spring is clamped on the left side of the inner cavity of the second sliding groove, and the right end of the spring is clamped on the outer wall of the sliding plate.

[0011] Preferably, in order to control the power supply and power failure of the power-off type electromagnet, the monitoring mechanism also includes: a slider, which is slidably adapted and plugged into the left side of the inner cavity of the first slide groove, the position of the slider corresponds to the position of the sliding plate, the inner cavity of the slider is slidably adapted and plugged into the outer wall of the first guide rod, and the inner wall of the inner cavity of the slider is equidistantly provided with a plurality of second rolling grooves along the circumferential direction; the second strong magnet is arranged on the inner side of the slider, the position of the second strong magnet corresponds to the position of the first strong magnet, and the second strong magnet and the first strong magnet are magnetically attracted to each other; the first contact is arranged at the outer right end of the slider; there are two support frames, and the two support frames are respectively arranged at the left ends of the front and rear sides of the outer wall of the polyfluoroethylene inner tube; the second contact is arranged on the left side of the support frame, the position of the second contact corresponds to the position of the first contact, and the two second contacts are respectively electrically connected to the two power-off type electromagnets.

[0012] Preferably, the left side of the second contact is located to the left of the right side of the inner cavity of the first slide groove.

[0013] Preferably, the inner cavity of the first rolling groove is rollably fitted with a first rolling ball, the outer wall of the first rolling ball contacts the outer wall of the first guide rod, and the inner cavity of the second rolling groove is rollably fitted with a second rolling ball, the outer wall of the second rolling ball contacts the outer wall of the second guide rod.

[0014] Preferably, the length of the first rolling ball inserted into the inner cavity of the first rolling groove is greater than its radius, and the length of the second rolling ball inserted into the inner cavity of the second rolling groove is greater than its radius.

[0015] The present invention provides a flow detection device and method for a water supply system, which has the following beneficial effects:

[0016] 1. The present invention utilizes an outer tube to be connected with a pipeline in a water supply system, and utilizes a polyfluoroethylene inner tube to transport water flow. When water flow generates water pressure, the water pressure can push the sliding plate to move the slider to the right through the first strong magnetic field and the second strong magnetic field until the first contact point and the second contact point contact each other, thereby powering the de-energized electromagnet to cause it to lose its magnetism, thereby driving the turbine blades to drive the rotating rod to rotate under the action of the water pressure, and utilizing a magnetoelectric sensor to monitor the rotation speed of the turbine blades, thereby converting the flow rate of the water flow.

[0017] 2. When the water supply is stopped, the water stops flowing and the water pressure disappears. Under the elastic force of the spring, the sliding plate is pulled to move the slider to the left through the first strong magnetic field and the second strong magnetic field, causing the first contact and the second contact to separate. The power-off type electromagnet stops supplying power, causing its magnetism to recover, and then the power-off type electromagnet is used to absorb the iron sheet currently corresponding to its position, so that the turntable can be positioned. The turntable can be further used to position the turbine blades through the rotating rod, thereby preventing the turbine blades from continuing to rotate due to inertia.

[0018] 3. This device can brake the turbine blades immediately after the water supply system stops supplying water, effectively eliminating the flow detection error caused by the inertial rotation of the turbine blades after the water flow is interrupted. This not only ensures the real-time and accuracy of the flow data, provides a reliable basis for decision-making for managers of the water supply system, but also avoids problems such as waste of resources and cost calculation errors caused by mismeasurement of flow, ensures the stable operation of the water supply system and the legitimate rights and interests of users, and further optimizes the rational allocation and utilization of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a top cross-sectional view of the present invention;

[0021] Figure 3 An exploded view of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the water pusher cover;

[0023] Figure 5 It is a structural schematic diagram of the slider;

[0024] Figure 6 for Figure 2 A magnified image of point A;

[0025] Figure 7 for Figure 2 A magnified view of point B;

[0026] Figure 8 for Figure 3 Enlarged view of point C;

[0027] Fig. 9 for Figure 3 The enlarged view of point D;

[0028] Fig.10 for Figure 4 The enlarged view of point E;

[0029] Fig.11 for Figure 4 Enlarged view of point F.

[0030] In the figure: 1. outer tube; 2. magnetoelectric sensor; 3. polyfluoroethylene inner tube; 4. first slide groove; 5. second slide groove; 6. first guide rod; 7. second guide rod; 8. monitoring mechanism; 81. sliding plate; 82. first rolling groove; 83. first rolling ball; 84. water push cover; 85. first strong magnet; 86. spring; 87. slider; 88. second rolling groove; 89. second rolling ball; 810. second strong magnet; 811. first contact; 812. support frame; 813. second contact; 9. braking mechanism; 91. turntable; 92. iron sheet; 93. limit ring; 94. power-off type electromagnet; 10. bracket; 11. rotating rod; 12. turbine blade. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 11The present invention provides a technical solution for a flow detection device of a water supply system, comprising: an outer tube 1, a magnetoelectric sensor 2, a polyfluoroethylene inner tube 3, a first chute 4, a second chute 5, a first guide rod 6, a second guide rod 7, a monitoring mechanism 8, a braking mechanism 9, a bracket 10, a rotating rod 11 and a turbine blade 12. The magnetoelectric sensor 2 is arranged at the middle of the top end of the outer wall of the outer tube 1, and the bottom end of the magnetoelectric sensor 2 extends into the inner cavity of the outer tube 1. The magnetoelectric sensor 2 is a prior art and will not be described in detail herein. The magnetoelectric sensor 2 is used to monitor the rotation speed of the turbine blade 12. The polyvinyl fluoride inner tube 3 is arranged in the inner cavity of the outer tube 1, and the bottom end of the magnetoelectric sensor 2 extends into the inner cavity of the polyvinyl fluoride inner tube 3. The left ends of the front and rear sides of the outer wall of the polyvinyl fluoride inner tube 3 are both provided with first slide grooves 4 along the left and right directions. The left ends of the front and rear sides of the inner wall of the polyvinyl fluoride inner tube 3 are both provided with second slide grooves 5 along the left and right directions. The position of the first slide groove 4 corresponds to the position of the second slide groove 5. The left and right ends of the first guide rod 6 are respectively arranged on the left and right sides of the inner cavity of the first slide groove 4. The first guide rod 6 can prevent the slider 87 from detaching from the first The inner cavity of the chute 4, the left and right ends of the second guide rod 7 are respectively arranged on the left and right sides of the inner cavity of the second chute 5, the second guide rod 7 can prevent the sliding plate 81 from escaping from the inner cavity of the second chute 5, the monitoring mechanism 8 is arranged on the left side of the inner cavity of the polyfluoroethylene inner tube 3, the monitoring mechanism 8 is used to monitor whether there is water flowing through, so as to control the power supply and power failure of the power-off type electromagnet 94, the number of the brackets 10 is two, the two brackets 10 are respectively arranged on the left and right sides of the inner cavity of the polyfluoroethylene inner tube 3, and the outer wall of the rotating rod 11 is rotatably arranged on two sides through bearings. In the middle of the inner cavity of the bracket 10, the right end of the rotating rod 11 can be rotatably extended to the right side of the right bracket 10. There are several turbine blades 12, and the several turbine blades 12 are equidistantly arranged in the middle of the outer wall of the rotating rod 11 along the circumferential direction. The position of the turbine blade 12 corresponds to the position of the magnetoelectric sensor 2. The turbine blade 12 can drive the rotating rod to rotate after being impacted by the water flow. The braking mechanism 9 is arranged on the right side of the inner cavity of the polyfluoroethylene inner tube 3. The braking mechanism 9 is used to brake the turbine blade 12 to prevent it from continuing to rotate due to inertia.

[0033] As a preferred solution, further, Figure 3 , Figure 7 and Figure 8As shown, the brake mechanism 9 includes: a rotating disk 91, an iron sheet 92, a limiting ring 93 and a power-off type electromagnet 94. The rotating disk 91 is sleeved on the right side of the outer wall of the rotating rod 11 and locked. There is a gap between the outer wall of the rotating disk 91 and the inner wall of the polyvinyl fluoride inner tube 3. The number of iron sheets 92 is several, and the several iron sheets 92 are respectively arranged on the outer wall of the rotating disk 91 at equal intervals along the circumferential direction. The number of iron sheets 92 is an even number. The number of power-off type electromagnets 94 is two, and the two power-off type electromagnets 94 are respectively arranged at the right ends of the front and rear sides of the outer wall of the polyvinyl fluoride inner tube 3. The inner ends of the two power-off type electromagnets 94 extend into the inner cavity of the polyvinyl fluoride inner tube 3. The position of the power-off type electromagnet 94 is The position corresponds to the position of the iron sheet 92. The power-off type electromagnet 94 is a prior art and will not be described in detail here. When the power-off type electromagnet 94 is powered off, its restored magnetism can absorb the iron sheet 92, thereby fixing the turbine blade 12 through the turntable 91 and the rotating rod 11 to prevent it from continuing to rotate due to inertia. The limiting ring 93 is arranged on the right side of the inner wall of the polyfluoroethylene inner tube 3, and the outer wall of the turntable 91 is located in the inner cavity of the limiting ring 93. There is a gap between the outer wall of the turntable 91 and the inner wall of the limiting ring 93. The limiting ring 93 is used to limit the turntable 91 to ensure its rotation stability while ensuring that the position of the power-off type electromagnet 94 corresponds to the position of the iron sheet 92.

[0034] As a preferred solution, further, Figure 4 , Figure 5 , Figure 6 , Fig. 9 , Fig.10 and Fig.11As shown, the monitoring mechanism 8 includes: a sliding plate 81, a first rolling groove 82, a first rolling ball 83, a water pushing cover 84, a first strong magnet 85, a spring 86, a slider 87, a second rolling groove 88, a second rolling ball 89, a second strong magnet 810, a first contact 811, a support frame 812 and a second contact 813. The front and rear ends of the sliding plate 81 can be slidably adapted and plugged into the right part of the inner cavity of the two second sliding grooves 5, respectively. The inner cavity of the sliding plate 81 can be slidably adapted and plugged into the outer wall of the second guide rod 7. The inner wall of the inner cavity of the sliding plate 81 is provided with a plurality of first rolling grooves 82 equidistantly along the circumferential direction. The first rolling ball 83 can be rollably adapted and plugged into the inner cavity of the first rolling groove 82. The outer wall of the first rolling ball 83 contacts the outer wall of the first guide rod 6. The first rolling ball 83 can be used to To reduce the friction between the sliding plate 81 and the first guide rod 6, the length of the first ball 83 inserted into the inner cavity of the first rolling groove 82 is greater than its radius, preventing the first ball 83 from escaping from the inner cavity of the first rolling groove 82, and the water pushing cover 84 is arranged at the middle part of the outer wall of the sliding plate 81. The water pushing cover 84 is used to increase the water retaining area, thereby ensuring that the impact force generated by the water flow can push the water pushing cover 84 to drive the sliding plate 81 to move to the right. The number of the first strong magnets 85 is two, and the two first strong magnets 85 are respectively arranged at the front and rear ends of the sliding plate 81. The first strong magnets 85 are prior art and will not be described in detail here. The spring 86 is sleeved on the left side of the outer wall of the second guide rod 7, and the left end of the spring 86 is clamped on the left side of the inner cavity of the second slide groove 5, and the right end of the spring 86 is clamped on the outer wall of the sliding plate 81. The spring 86 is a rotation spring, which undergoes elastic deformation after being squeezed or stretched by an external force, and returns to its initial state after the external force is removed. The spring 86 is used here to pull the sliding plate 81 back to its initial position, and the sliding block 87 is slidably adapted and plugged into the left side of the inner cavity of the first sliding groove 4. The position of the sliding block 87 corresponds to the position of the sliding plate 81. The inner cavity of the sliding block 87 is slidably adapted and plugged into the outer wall of the first guide rod 6. The inner wall of the inner cavity of the sliding block 87 is provided with a plurality of second rolling grooves 88 equidistantly along the circumferential direction. The second rolling ball 89 is rollably adapted and plugged into the inner cavity of the second rolling groove 88. The outer wall of the second rolling ball 89 contacts the outer wall of the second guide rod 7. The friction between the sliding block 87 and the second guide rod 7 can be reduced by using the second rolling ball 89. 9 is inserted into the inner cavity of the second rolling groove 88 with a length greater than its radius, so as to prevent the second rolling ball 89 from escaping from the inner cavity of the second rolling groove 88. The second strong magnet 810 is arranged on the inner side of the slider 87. The position of the second strong magnet 810 corresponds to the position of the first strong magnet 85, and the second strong magnet 810 and the first strong magnet 85 are magnetically attracted to each other. The second strong magnet 810 is a prior art and will not be described in detail here. When the first strong magnet 85 moves left and right, the slider 87 can be driven to move left and right by the second strong magnet 810 by utilizing the magnetic attraction between the second strong magnet 810 and the first strong magnet 85. The first contact 811 is arranged at the outer right end of the slider 87. There are two support frames 812, which are respectively arranged at the left ends of the front and rear sides of the outer wall of the polyfluoroethylene inner tube 3.The second contact 813 is arranged on the left side of the support frame 812. The position of the second contact 813 corresponds to the position of the first contact 811. The two second contacts 813 are electrically connected to the two power-off type electromagnets 94 respectively. The left side of the second contact 813 is located to the left of the right side of the inner cavity of the first slide slot 4, ensuring that the first contact 811 can contact the second contact 813.

[0035] The working principle includes the following steps:

[0036] Step 1. This device is connected to the water pipe of the water supply system through the outer tube 1, and the polyfluoroethylene inner tube 3 is used to transport water flow, and the water flow is ensured to flow from left to right. The first contact 811 is connected to the external power supply. When the water is supplied, the water flow from left to right forms a water pressure that impacts the water push cover 84 and the turbine blades 12. The water flow impacting the water push cover 84 will prompt the water push cover 84 to drive the sliding plate 81 to move to the right, and then use the sliding plate 81 to drive the first strong magnet 85 to move to the right, and stretch the spring 86 to elastically deform, and at the same time use the first rolling ball 83 reduces the friction between the sliding plate 81 and the second guide rod 7, ensuring that the sliding plate 81 can move smoothly to the right. When the first strong magnet 85 moves to the right, the second strong magnet 810 is attracted by the magnetic force to drive the slider 87 to move to the right. At the same time, the second rolling ball 89 is used to reduce the friction between the slider 87 and the first guide rod 6, ensuring that the slider 87 moves smoothly to the right, so that the slider 87 drives the first contact 811 to move to the right until the first contact 811 and the second contact 813 are in contact, thereby forming a circuit conduction, and the power-off type The electromagnet 94 loses its magnetism when it is energized. At the same time, the water pressure impacts the turbine blade 12, causing the turbine blade 12 to drive the rotating rod 11 to rotate. The rotating rod 11 rotates and drives the turntable 91 to rotate. Since the rotation angular velocity of the turbine blade 12 is proportional to the fluid flow rate, and the magnetoelectric sensor 2 can generate a stable magnetic field using permanent magnets, when the turbine blade 12 rotates, the turbine blade 12 will periodically cut the magnetic lines of force generated by the permanent magnets, thereby generating an induced electromotive force. According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force is proportional to the strength of the magnetic field, the speed of the conductor, and the effective length of the conductor in the magnetic field. As the turbine blade 12 rotates, the magnetic flux in the sensing coil changes periodically, thereby generating an induced electromotive force proportional to the turbine rotation speed. The sensing coil sends the detected induced electromotive force signal to the preamplifier for amplification and shaping processing, generating a pulse signal proportional to the flow rate, and these pulse signals are then sent to the unit conversion and flow integration circuit for processing, and finally the cumulative flow value and the instantaneous flow value are obtained and displayed, thereby detecting the flow;

[0037] Step 2, when the valve needs to be closed to stop the water supply, the water flow stops moving, and the water push cover 84 loses the impact force of the water flow, and then the sliding plate 81 can be pulled to the left under the elastic force of the spring 86. The sliding plate 81 moves to the left and uses the cooperation between the first strong magnet 85 and the second strong magnet 810 to drive the first contact 811 to move to the left through the slider 87 until the sliding plate 81 and the slider 87 return to their initial positions. When the first contact 811 and the second contact 813 are separated, the circuit is disconnected, and the power supply to the de-energized electromagnet 94 is stopped. The de-energized electromagnet 94 restores its magnetism, and uses the magnetism of the de-energized electromagnet 94 to absorb the iron sheet 92 currently corresponding to its position, thereby positioning the turntable 91 to prevent the turntable 91 from continuing to rotate, and then positioning the rotating rod 11 through the turntable 91, thereby preventing the turbine blades 12 from continuing to rotate due to inertia, thereby enhancing the accuracy of the detection result.

[0038] In summary, the present device realizes instant braking of the turbine blades 12 after the water supply system stops supplying water, thereby effectively eliminating the flow detection error caused by the inertial rotation of the turbine blades 12 after the water flow is interrupted. This not only ensures the real-time and accuracy of the flow data, and provides a reliable basis for decision-making for managers of the water supply system, but also avoids problems such as waste of resources and cost calculation errors caused by mismeasurement of flow, thereby ensuring the stable operation of the water supply system and the legitimate rights and interests of users, and further optimizing the rational allocation and utilization of water resources.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow detection device for a water supply system, characterized in that: include: Outer tube (1); A magnetoelectric sensor (2), the magnetoelectric sensor (2) being arranged at the middle of the top end of the outer wall of the outer tube (1), and the bottom end of the magnetoelectric sensor (2) extending into the inner cavity of the outer tube (1); A polyvinyl fluoride inner tube (3), the polyvinyl fluoride inner tube (3) being arranged in the inner cavity of the outer tube (1), the bottom end of the magnetoelectric sensor (2) extending into the inner cavity of the polyvinyl fluoride inner tube (3), the outer wall of the polyvinyl fluoride inner tube (3) being provided with first slide grooves (4) at both the front and rear left ends along the left-right direction, the inner wall of the polyvinyl fluoride inner tube (3) being provided with second slide grooves (5) at both the front and rear left ends along the left-right direction, the position of the first slide groove (4) corresponding to the position of the second slide groove (5); A first guide rod (6), the left and right ends of the first guide rod (6) being respectively arranged on the left and right sides of the inner cavity of the first slide groove (4); A second guide rod (7), the left and right ends of the second guide rod (7) being respectively arranged on the left and right sides of the inner cavity of the second slide groove (5); A monitoring mechanism (8), the monitoring mechanism (8) being arranged on the left side of the inner cavity of the polyfluoroethylene inner tube (3); A stent (10), wherein the number of the stents (10) is two, and the two stents (10) are respectively arranged on the left and right sides of the inner cavity of the polyfluoroethylene inner tube (3); A rotating rod (11), the left and right sides of the outer wall of the rotating rod (11) are rotatably arranged in the middle of the inner cavity of the two brackets (10) through bearings, and the right end of the rotating rod (11) is rotatably extended to the right side of the right bracket (10); Turbine blades (12), the number of the turbine blades (12) being a plurality, the plurality of turbine blades (12) being respectively arranged at equal intervals along the circumferential direction at the middle portion of the outer wall of the rotating rod (11), the position of the turbine blades (12) corresponding to the position of the magnetoelectric sensor (2); A braking mechanism (9), wherein the braking mechanism (9) is arranged on the right side of the inner cavity of the polyfluoroethylene inner tube (3); The braking mechanism (9) comprises: A rotating disk (91), the rotating disk (91) being sleeved on the right side of the outer wall of the rotating rod (11) and locked, and a gap being present between the outer wall of the rotating disk (91) and the inner wall of the polyfluoroethylene inner tube (3); Iron sheets (92), the number of the iron sheets (92) is a plurality, the plurality of iron sheets (92) are respectively arranged on the outer wall of the rotating disk (91) at equal intervals along the circumferential direction, and the number of the iron sheets (92) is an even number; A de-energizing electromagnet (94), wherein the number of the de-energizing electromagnet (94) is two, the two de-energizing electromagnets (94) being respectively arranged on the front and rear sides of the outer wall of the polyvinyl fluoride inner tube (3), the inner ends of the two de-energizing electromagnets (94) both extending into the inner cavity of the polyvinyl fluoride inner tube (3), and the position of the de-energizing electromagnet (94) corresponding to the position of the iron sheet (92).

2. A flow detection device for a water supply system according to claim 1, characterized in that: A limiting ring (93) is provided on the right side of the inner wall of the polyfluoroethylene inner tube (3); the outer wall of the rotating disk (91) is located in the inner cavity of the limiting ring (93); and a gap exists between the outer wall of the rotating disk (91) and the inner wall of the limiting ring (93).

3. A flow detection device for a water supply system according to claim 2, characterized in that: The monitoring mechanism (8) comprises: A sliding plate (81), the front and rear ends of the sliding plate (81) are respectively slidably adapted to be inserted into the right parts of the inner cavities of the two second slide grooves (5), the inner cavity of the sliding plate (81) is slidably adapted to be inserted into the outer wall of the second guide rod (7), and the inner wall of the inner cavity of the sliding plate (81) is provided with a plurality of first rolling grooves (82) equidistantly along the circumferential direction; A water pushing cover (84), wherein the water pushing cover (84) is arranged at the middle part of the outer wall of the sliding plate (81); A first strong magnet (85), wherein the number of the first strong magnet (85) is two, and the two first strong magnets (85) are respectively arranged at the front and rear ends of the sliding plate (81); A spring (86), wherein the spring (86) is sleeved on the left side of the outer wall of the second guide rod (7), the left end of the spring (86) is clamped on the left side of the inner cavity of the second slide groove (5), and the right end of the spring (86) is clamped on the outer wall of the sliding plate (81).

4. A flow detection device for a water supply system according to claim 3, characterized in that: The monitoring mechanism (8) further comprises: A slider (87), the slider (87) can be slidably adapted and inserted into the left side of the inner cavity of the first slide groove (4), the position of the slider (87) corresponds to the position of the sliding plate (81), the inner cavity of the slider (87) can be slidably adapted and inserted into the outer wall of the first guide rod (6), and the inner wall of the inner cavity of the slider (87) is provided with a plurality of second rolling grooves (88) equidistantly along the circumferential direction; a second strong magnet (810), wherein the second strong magnet (810) is arranged on the inner side of the slider (87), the position of the second strong magnet (810) corresponds to the position of the first strong magnet (85), and the second strong magnet (810) and the first strong magnet (85) are magnetically attracted to each other; A first contact point (811), the first contact point (811) being arranged at the outer right end of the slider (87); Support frames (812), the number of the support frames (812) being two, and the two support frames (812) being respectively arranged at the left ends of the front and rear sides of the outer wall of the polyfluoroethylene inner tube (3); A second contact (813), the second contact (813) is arranged on the left side of the support frame (812), the position of the second contact (813) corresponds to the position of the first contact (811), and the two second contacts (813) are electrically connected to the two power-off type electromagnets (94) respectively.

5. A flow detection device for a water supply system according to claim 4, characterized in that: The left side of the second contact point (813) is located to the left of the right side of the inner cavity of the first slide groove (4).

6. A flow detection device for a water supply system according to claim 5, characterized in that: A first rolling ball (83) is rollably fitted into the inner cavity of the first rolling groove (82), and the outer wall of the first rolling ball (83) contacts the outer wall of the first guide rod (6). A second rolling ball (89) is rollably fitted into the inner cavity of the second rolling groove (88), and the outer wall of the second rolling ball (89) contacts the outer wall of the second guide rod (7).

7. A flow rate detection device for a water supply system according to claim 6, characterized in that: The length of the first rolling ball (83) inserted into the inner cavity of the first rolling groove (82) is greater than its radius, and the length of the second rolling ball (89) inserted into the inner cavity of the second rolling groove (88) is greater than its radius.

8. A flow detection method for a water supply system, applied to a flow detection device for a water supply system as claimed in claim 7, specifically comprising the following steps: Step 1: The device is connected to a water pipe of a water supply system through an outer pipe (1), and a polyfluoroethylene inner pipe (3) is used to transport water, and the water flow is ensured to flow from left to right. The first contact (811) is connected to an external power source. When the water is supplied, the water flow from left to right forms a water pressure that impacts the water push cover (84) and the turbine blades (12). The water flow impacting the water push cover (84) prompts the water push cover (84) to drive the sliding plate (81) to move to the right, and then the sliding plate (81) is used to drive the first strong magnet (85) to move to the right, and the spring (86) is stretched to undergo elastic deformation, and at the same time, the water pressure is used to generate a pressure drop. The first rolling ball (83) reduces the friction between the sliding plate (81) and the second guide rod (7), ensuring that the sliding plate (81) can move smoothly to the right. When the first strong magnet (85) moves to the right, it attracts the second strong magnet (810) under the action of magnetic force to drive the slider (87) to move to the right. At the same time, the second rolling ball (89) reduces the friction between the slider (87) and the first guide rod (6), ensuring that the slider (87) moves smoothly to the right. The slider (87) drives the first contact (811) to move to the right until the first contact (811) and the second contact (813) are in contact. The electric circuit is connected, and the de-energized electromagnet (94) loses its magnetism when it is energized. At the same time, the water pressure impacts the turbine blades (12), causing the turbine blades (12) to drive the rotating rod (11) to rotate. The rotating rod (11) rotates and drives the turntable (91) to rotate. Since the rotational angular velocity of the turbine blades (12) is proportional to the fluid flow rate, and the magnetoelectric sensor (2) can generate a stable magnetic field using permanent magnets, when the turbine blades (12) rotate, the turbine blades (12) will periodically cut the magnetic lines of force generated by the permanent magnets, thereby generating an induced electromotive force. According to Faraday's law, According to the law of magnetic induction, the magnitude of the induced electromotive force is proportional to the strength of the magnetic field, the speed of the conductor and the effective length of the conductor in the magnetic field. As the turbine blades (12) rotate, the magnetic flux in the sensing coil changes periodically, thereby generating an induced electromotive force proportional to the turbine rotation speed. The sensing coil sends the detected induced electromotive force signal to the preamplifier for amplification and shaping processing, thereby generating a pulse signal proportional to the flow rate. These pulse signals are then sent to the unit conversion and flow accumulation circuit for processing, and finally the accumulated flow value and the instantaneous flow value are obtained and displayed, thereby detecting the flow rate; Step 2: When the valve is closed and the water supply needs to be stopped, the water flow stops moving, and the water shield (84) loses the impact force of the water flow, and then the sliding plate (81) can be pulled to move to the left under the elastic force of the spring (86). The sliding plate (81) moves to the left by utilizing the cooperation between the first strong magnet (85) and the second strong magnet (810) to drive the first contact (811) to move to the left through the slider (87), until the sliding plate (81) and the slider (87) return to their initial positions. When the first contact (811) is moved to the left, the sliding plate (81) and the slider (87) return to their initial positions. After the contact (11) and the second contact (813) are separated, the circuit is disconnected, and the power supply to the de-energized electromagnet (94) stops. The de-energized electromagnet (94) recovers its magnetism, and the magnetism of the de-energized electromagnet (94) is used to absorb the iron sheet (92) currently corresponding to its position, thereby positioning the turntable (91) and preventing the turntable (91) from continuing to rotate. The rotating rod (11) is then positioned through the turntable (91), thereby preventing the turbine blades (12) from continuing to rotate due to inertia, thereby enhancing the accuracy of the detection result.

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