High-sensitivity and high-precision integrated flow sensor

Abstract

The utility model discloses a high-sensitivity high-precision integrated flow sensor, which comprises a shell capable of allowing water to pass through, a fixed seat and a support are arranged in the shell, a central rotating shaft is rotatably connected between the fixed seat and the support, an impeller is fixedly mounted on the central rotating shaft, a plurality of blades are arranged on the impeller, and the blades are arranged on the central rotating shaft. The outer side of at least one blade is provided with a magnet installation groove integrated with the blade, a magnet is detachably connected into the magnet installation groove, and a Hall sensor corresponding to the position of the magnet is installed on the outer side wall of the shell. The utility model has the advantages of higher sensitivity and accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of flow sensors, and in particular to a high-sensitivity and high-precision integrated flow sensor. Background Art

[0002] Many conventional flow sensors typically use a mechanical structure consisting of an impeller and a magnet slot to detect fluid flow. In this design, the impeller is placed in the fluid path and is rotated by the flowing fluid. The magnet slot, which is usually fixed to or near the impeller, contains one or more magnets that are used to generate a magnetic field that changes as the impeller rotates. By detecting changes in these magnetic fields, the flow sensor can convert them into flow data.

[0003] However, this conventional structural design has some significant shortcomings. First, since the impeller and the magnet slot are two independent parts, they need to be connected by a shaft core. This design not only increases the complexity of manufacturing and assembly, but also in actual use, assembly gaps, looseness, and misalignment between the two parts often occur. These problems will cause the impeller and magnet rotation to be unable to be fully synchronized, thus affecting the overall performance of the flow sensor.

[0004] Specifically, due to the reduced synchronization of the impeller and magnet rotation, it becomes more difficult to capture the pulse signal generated by the fluid flow, especially under low flow conditions. This directly affects the sensitivity of the flow sensor in detecting flow, making it difficult to accurately capture tiny flow changes. In addition, the accuracy of the flow data is also negatively affected due to the mismatch and misalignment between parts. These problems not only greatly reduce the performance of the flow sensor, but may also lead to erroneous flow data recording, which in turn affects the normal operation of the entire system.

[0005] Therefore, it is necessary to further improve and perfect the prior art to overcome these deficiencies, and the present invention is made based on this situation. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a flow sensor with higher sensitivity and accuracy.

[0007] The utility model is realized by the following technical solutions:

[0008] In order to solve the above technical problems, the utility model provides a high-sensitivity and high-precision integrated flow sensor, including a shell through which water can flow, a fixing seat and a bracket are provided in the shell, a central rotating shaft is rotatably connected between the fixing seat and the bracket, an impeller is fixedly mounted on the central rotating shaft, a plurality of blades are provided on the impeller, at least one blade is provided with a magnet mounting groove integrated therewith on the outer side, a magnet is detachably connected to the magnet mounting groove, and a Hall sensor corresponding to the position of the magnet is mounted on the outer side wall of the shell.

[0009] In order to further solve the technical problem to be solved by the utility model, in a high-sensitivity and high-precision integrated flow sensor provided by the utility model, the magnet is interference-fitted in the corresponding magnet installation groove.

[0010] In order to further solve the technical problem to be solved by the utility model, in a high-sensitivity and high-precision integrated flow sensor provided by the utility model, a plurality of magnet mounting grooves are provided and are evenly distributed along the axis of the impeller and arranged on the corresponding blades.

[0011] In order to further solve the technical problem to be solved by the utility model, in a high-sensitivity and high-precision integrated flow sensor provided by the utility model, the fixing seat and the bracket can be detachably installed in the shell, and the bracket and the fixing seat can also be detachably connected.

[0012] In order to further solve the technical problem to be solved by the utility model, the utility model provides a high-sensitivity and high-precision integrated flow sensor, wherein the shell includes an upper shell and a lower shell, the lower shell is provided with a limiting step, the fixing seat is inserted into the lower shell from top to bottom and rests on the limiting step, the upper shell is detachably connected to the lower shell, and the lower end of the upper shell presses the fixing seat downward.

[0013] In order to further solve the technical problem to be solved by the utility model, the utility model provides a high-sensitivity and high-precision integrated flow sensor, in which the lower end of the upper shell is inserted into the opening of the upper end of the lower shell, and the two are tightly connected by a U-shaped pin and a sealing ring.

[0014] In order to further solve the technical problem to be solved by the utility model, in a high-sensitivity and high-precision integrated flow sensor provided by the utility model, the inner side wall of the lower shell is provided with a limiting groove for inserting and positioning the bracket.

[0015] In order to further solve the technical problem to be solved by the utility model, the utility model provides a high-sensitivity and high-precision integrated flow sensor, in which a water uniforming baffle is provided on the fixed seat, and water uniforming holes evenly distributed and facing the corresponding blade positions are opened on the water uniforming baffle.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. In the utility model, since the magnet, the blade and the magnet mounting slot are integrated, the rotation of the magnet is strictly synchronized with the rotation of the impeller, which greatly improves the sensitivity and accuracy of the flow sensor when detecting flow. In addition, the integrated design also eliminates the errors caused by component gaps and looseness in traditional designs, ensuring the reliability of the flow sensor and the accuracy of the measured data.

[0018] 2. The detachable design of the magnet facilitates disassembly, maintenance and replacement, and also helps to reduce production and assembly costs.

[0019] 3. The magnet installation slot is set on the outside of the blade, so the movement radius of the magnet in the magnet installation slot is relatively large, which is conducive to improving the sensitivity of the sensor. In addition, the design of the magnet moving on the outside also helps to reduce the structural complexity and torsional strength requirements of the impeller center.

[0020] 4. The fixing base and the bracket can be detachably installed in the housing, so that they can be conveniently assembled inside the housing. And the bracket and the fixing base can also be easily connected or disassembled from each other. This design increases the modularity and maintenance convenience of the device, and also simplifies the assembly and disassembly process.

[0021] 5. A water-distributing baffle is provided on the fixed seat, and a plurality of water-distributing holes are designed on the water-distributing baffle. Such a design is conducive to uniform distribution of the fluid and reduction of uneven load on the impeller, thereby reducing vibration and noise, and improving the efficiency and life of the entire device. The fluid can act on the impeller more directly and effectively. This direct action reduces the loss of fluid kinetic energy, thereby improving rotation efficiency and overall power performance. For some applications that require high-precision flow control, the uniform distribution of the water-distributing holes and the design of precise alignment of the blades can ensure the stability and controllability of the flow, which is particularly important in precision equipment such as flow sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 It is an exploded schematic diagram of the fixed seat, bracket and impeller;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower shell. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figures 1 to 4 The high-sensitivity and high-precision integrated flow sensor shown in the figure comprises a housing 1 through which water can flow, and a fixing seat 2 and a bracket 3 are arranged in the housing 1. A central rotating shaft 4 is rotatably connected between the fixing seat 2 and the bracket 3, that is, the fixing seat 2 and the bracket 3 form a frame for installing the central rotating shaft 4, and the upper and lower ends of the central rotating shaft 4 are rotatably inserted into the fixing seat 2 and the bracket 3 respectively and can rotate freely between the two.

[0029] An impeller 5 is fixedly mounted on the central rotating shaft 4. The impeller 5 is designed with a plurality of streamlined blades 51. The impeller 5 rotates around the central rotating shaft 4 under the push of the water flow and reflects the flow rate through the precise rotation speed.

[0030] It is worth noting that at least one blade 51 on the impeller 5 has a magnet mounting groove 52 integrated on its outer side (preferably, two symmetrical blades 51 on the impeller 5 have magnet mounting grooves 52 integrated on their outer sides), which are integrated with the impeller 5 and the blades 51 through an integrated injection molding process. This integrated design not only ensures the synchronous rotation of the magnet 6 and the blades 51, thereby improving the accuracy of flow measurement, but also simplifies the assembly process and improves the overall structural strength.

[0031] In this design, the magnet 6 is usually made of magnetic material and is designed to be detachably connected and placed in the magnet installation slot 52. The detachable design of the magnet 6 is convenient for disassembly, maintenance and replacement, and is also conducive to reducing the cost of production and assembly.

[0032] Correspondingly, a Hall sensor 7 is installed on the outer wall of the housing 1 to detect the magnetic field change of the magnet 6. The Hall sensor 7 is positioned corresponding to the magnet 6 and can accurately capture the magnetic field change generated by the magnet 6.

[0033] In the present invention, since the magnet 6 is integrated with the blade 51 and the magnet mounting slot 52, the rotation of the magnet 6 is strictly synchronized with the rotation of the impeller 5, which greatly improves the sensitivity and accuracy of the flow sensor when detecting the flow. In addition, the integrated design also eliminates the errors caused by the gap and looseness of the components in the traditional design, ensuring the reliability of the flow sensor and the accuracy of the measured data.

[0034] More specifically, the magnet 6 is interference-fitted in the corresponding magnet mounting slot 52. Such a design realizes a firm connection between the magnet 6 and the magnet mounting slot 52, ensuring that the magnet will not shift during the rotation of the impeller, thereby avoiding the problem that may lead to reduced measurement accuracy.

[0035] It is worth noting that the magnet installation slot 52 is arranged on the outside of the blade 51, so the movement radius of the magnet 6 in the magnet installation slot 52 is relatively large, which is conducive to improving the sensitivity of the sensor. More specifically, since the magnet 6 is located at a larger movement radius, the centrifugal force generated by it when the impeller 5 rotates is also relatively large. In this way, when the magnet 6 rotates a fixed angle each time, the magnetic field change generated by it can be detected by the Hall sensor 7 at a longer distance, which is conducive to improving the sensitivity and measurement accuracy of the sensor.

[0036] Physically, the increase in the movement radius means that the linear speed of the magnet 6 is higher at the same rotation speed. Since the Hall sensor 7 detects the change in the magnetic field, the rapid movement of the magnet 6 causes the frequency and intensity of the magnetic field change to increase, so that the Hall sensor 7 can more sensitively respond to the flow change. In practical applications, even very small flow changes can be detected by the sensor in a timely manner and accurately converted into electrical signals, thereby providing very precise flow control and monitoring capabilities.

[0037] In addition, the design of magnet 6 moving on the outside also helps to reduce the structural complexity and torsional strength requirements of the impeller center, because magnet 6 is not placed on or near the central shaft 4, thereby reducing the stress burden of the central shaft when rotating at high speed. This design not only improves the response speed and accuracy of the sensor, but also helps to improve the durability and reliability of the entire device.

[0038] In order to further improve the overall performance and measurement accuracy of the flow sensor, preferably, there is not only one magnet installation slot 52, but a design of multiple (two or more) magnet installation slots is adopted (two magnet installation slots are shown in the figure), and these magnet installation slots are evenly distributed on each corresponding blade 51 along the axis of the impeller 5. This evenly distributed design has many significant advantages:

[0039] 1) Balance: The uniform distribution of multiple magnets 6 can maintain the balance of the impeller 5, especially when rotating at high speed, which can effectively reduce vibration and noise. A well-balanced impeller can reduce mechanical wear and extend the service life of the equipment.

[0040] 2) Sensitivity: Since the magnets are evenly distributed on different blades, it can be ensured that there are magnets within the detection range of the sensor at any time during the rotation of the impeller. This can further improve the system's detection sensitivity to flow changes, especially when the flow changes are very small, and it can still accurately capture them.

[0041] 3) Accuracy: Evenly distributed magnets can more accurately reflect the speed of the impeller, because the deviation of any one magnet will be balanced by the readings of other magnets. This design helps to improve the accuracy of the sensor throughout the operating range, especially in flow detection with a wide dynamic range.

[0042] 4) Uniform magnetic field distribution: Multiple magnets evenly distributed help to produce a uniform magnetic field within the moving area of ​​the impeller, which can make the readings of the Hall effect sensor more stable and consistent because it reduces the fluctuation of the magnetic field strength along the impeller's rotation trajectory.

[0043] This design strategy of evenly distributing multiple magnets significantly improves the performance of the device, ensuring that it can continuously and accurately measure flow under various working conditions and adapt to a wider range of application requirements.

[0044] More specifically, the fixing base 2 and the bracket 3 can be detachably installed in the housing 1, so that they can be conveniently assembled into the housing 1. And the bracket 3 and the fixing base 2 can also be easily connected or disassembled from each other. This design increases the modularity and maintenance convenience of the device, and also simplifies the assembly and disassembly process.

[0045] The housing 1 is composed of two main parts: an upper shell 11 and a lower shell 12. In this design, a stop step 121 is specially designed inside the lower shell 12, and this step is used to support the fixing seat 2. During the assembly process, the fixing seat 2 can be inserted into the lower shell 12 from the top and positioned on the stop step 121. This design ensures that the fixing seat is firmly positioned and simplifies the assembly process.

[0046] Then, the lower end of the upper shell 11 is inserted into the opening of the upper end of the lower shell 12, and the two are tightly connected by a U-shaped latch and a sealing ring to fix the entire structure. The bottom end of the upper shell 11 will press the fixing base 2 downward to ensure the stability and vibration resistance of the fixing base 2 during operation, and avoid the reduction of instrument accuracy or damage to parts due to vibration.

[0047] In order to further optimize the installation of the bracket 3, the inner side wall of the lower shell 12 is specially designed with limiting grooves 122. The bracket 3 can be directly inserted into these limiting grooves to ensure accurate positioning and firm fixation of the bracket. This insertion and positioning method not only simplifies the assembly process of the device, but also provides a stable support structure to maintain the correct position relationship of the mechanical components inside the device.

[0048] This design allows the entire device to be disassembled quickly and without special tools when maintenance, cleaning or replacement of parts is required, greatly reducing the time cost of maintenance and repair. At the same time, the modular design also facilitates potential upgrades and customized modifications, providing good flexibility and scalability to meet the specific needs of different users. These designs take into account the convenience of actual operation and the maintenance cost of users, taking into account the long-term operational stability and economic benefits of the equipment.

[0049] More specifically, a water-distributing baffle 21 is provided on the fixing seat 2. This baffle is not only a structural part, but also plays a vital role in fluid dynamics. The water-distributing baffle 21 is designed with a plurality of water-distributing holes 211, which are not only evenly distributed on the baffle, but also aligned with the positions of the corresponding blades 51 below.

[0050] The advantages of this design are multiple:

[0051] 1) Uniform fluid distribution: By providing uniformly distributed water distribution holes 211 on the water distribution baffle 21, it is possible to ensure that the liquid is more evenly distributed before entering the impeller. This helps to reduce the uneven load on the impeller, thereby reducing vibration and noise, and improving the efficiency and life of the entire device.

[0052] 2) Enhanced dynamic performance: The water-distributing holes 211 are arranged facing the positions of the corresponding blades 51, which means that the fluid can act on the impeller more directly and effectively. This direct action reduces the loss of fluid kinetic energy, thereby improving the rotation efficiency and the overall dynamic performance.

[0053] 3) Reduced energy consumption: By making the fluid directly align with the blades, the additional energy loss caused by the change of fluid direction can be reduced. This fine-tuned flow direction helps the entire system run more energy-efficiently and reduces operating costs.

[0054] 4) Improved accuracy: For some applications that require high-precision flow control, the uniform distribution of the water-leveling holes 211 and the design of precise alignment of the blades can ensure the stability and controllability of the flow, which is particularly important in precision equipment such as flow sensors.

[0055] 5) Simplified structural design: The design of the water-distributing baffle 21 integrates multiple functions, reducing the need for additional components to achieve the same function, thereby simplifying the overall structure and reducing manufacturing costs and maintenance difficulties.

Claims

1. A high-sensitivity and high-precision integrated flow sensor, characterized in that: The invention comprises a shell (1) through which water can flow, wherein a fixing seat (2) and a bracket (3) are arranged in the shell (1), a central rotating shaft (4) is rotatably connected between the fixing seat (2) and the bracket (3), an impeller (5) is fixedly mounted on the central rotating shaft (4), a plurality of blades (51) are arranged on the impeller (5), at least one blade (51) is provided with a magnet mounting groove (52) integral therewith on the outer side, a magnet (6) is detachably connected to the magnet mounting groove (52), and a Hall sensor (7) corresponding to the position of the magnet (6) is mounted on the outer side wall of the shell (1).

2. The high-sensitivity and high-precision integrated flow sensor according to claim 1, characterized in that: The magnet (6) is interference fit in the corresponding magnet installation groove (52).

3. The high-sensitivity and high-precision integrated flow sensor according to claim 1, characterized in that: The magnet installation grooves (52) are provided in plurality and are evenly distributed along the axis of the impeller (5) and arranged on corresponding blades (51).

4. The high-sensitivity and high-precision integrated flow sensor according to claim 1, characterized in that: The fixing seat (2) and the bracket (3) can both be detachably mounted in the housing (1), and the bracket (3) and the fixing seat (2) can also be detachably connected.

5. The high-sensitivity and high-precision integrated flow sensor according to claim 4, characterized in that: The housing (1) comprises an upper shell (11) and a lower shell (12); a limiting step (121) is provided in the lower shell (12); the fixing seat (2) is inserted into the lower shell (12) from top to bottom and abuts against the limiting step (121); the upper shell (11) is detachably connected to the lower shell (12), and the lower end of the upper shell (11) presses the fixing seat (2) downward.

6. The high-sensitivity and high-precision integrated flow sensor according to claim 5, characterized in that: The lower end of the upper shell (11) is inserted into the opening of the upper end of the lower shell (12), and the two are tightly connected via a U-shaped latch and a sealing ring.

7. The high-sensitivity and high-precision integrated flow sensor according to claim 5, characterized in that: The inner side wall of the lower shell (12) is provided with a limiting groove (122) for inserting and positioning the bracket (3).

8. The high-sensitivity and high-precision integrated flow sensor according to claim 1, characterized in that: The fixing seat (2) is provided with a water-distributing baffle (21), and the water-distributing baffle (21) is provided with water-distributing holes (211) evenly distributed and facing the positions of corresponding blades (51).

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