Hall flowmeter

Abstract

The utility model relates to the technical field of flow monitoring, in particular to a Hall flow meter, which comprises a shell, a Hall element, a Hall element, a Hall element, a Hall element, a Hall element and a Hall element, the shell is provided with a flow channel, and the inner peripheral wall of the shell is convexly provided with a stop part; the flow guide cylinder is arranged in the flow channel, and the peripheral wall of the flow guide cylinder abuts against the stop part; the flow impeller is rotatably inserted into one side, opposite to the water inlet end of the flow channel, of the guide cylinder; wherein the outer peripheral wall of the shell is provided with a Hall circuit, the Hall circuit is provided with a Hall element, blades of the flow impeller are provided with magnetic parts, and the Hall element is configured to sense a magnetic field generated by the magnetic parts. The utility model aims to provide a Hall flow meter and aims to reduce the assembly difficulty of the Hall flow meter.

Description

Technical Field

[0001] This utility model relates to the field of flow detection technology, and in particular to a Hall effect flow meter. Background Technology

[0002] Flow measurement is an integral part of metrology science and technology. Modern metrology is a product of the high integration of optics, mechanics, electronics, computers, and many fundamental disciplines, and is highly sensitive to new technologies. In today's era of rapid information technology development, product updates are frequent, with new products launched every year. Competition is becoming increasingly fierce, and the requirements for the accuracy and range of flow measurement are becoming higher and higher. This is to ensure product quality, improve production efficiency, reduce costs, and make products more competitive in today's increasingly automated industrial production environment.

[0003] Currently, the known Hall effect flow meter consists of a housing, control circuit, impeller, guide tube, and retaining ring (stop washer). The impeller is assembled into the housing, then the guide tube is assembled and secured with the retaining ring. The guide tube and retaining ring need to fit tightly; a loose retaining ring can easily fall off, while an overly tight one increases assembly difficulty, reduces efficiency, and can easily damage components. Utility Model Content

[0004] The main purpose of this invention is to propose a Hall effect flow meter that aims to reduce the assembly difficulty of the Hall effect flow meter.

[0005] To achieve the above objectives, the Hall effect flow meter includes:

[0006] The outer casing is provided with a flow channel, and a stop portion is protruding from the inner peripheral wall of the outer casing;

[0007] A flow guide tube, wherein the flow guide tube is fitted within the flow channel, and the outer peripheral wall of the flow guide tube abuts against the stop portion; and

[0008] A flow impeller is rotatably inserted into the side of the guide tube opposite to the water inlet end of the flow channel;

[0009] The outer peripheral wall of the housing has a Hall circuit, the Hall circuit has a Hall element, the blades of the flow impeller have magnetic elements, and the Hall element is configured to sense the magnetic field generated by the magnetic elements.

[0010] In one embodiment of the present invention, the stop portion protrudes uniformly along the radial direction of the flow channel.

[0011] In one embodiment of the present invention, the outer shell includes a first cylindrical body and a second cylindrical body with an integral structure, wherein the inner diameter of the second cylindrical body is smaller than the inner diameter of the first cylindrical body, so that the stop portion is formed between the second cylindrical body and the first cylindrical body;

[0012] The guide tube is located in the first cylinder, and the flow impeller is located in the second cylinder.

[0013] In one embodiment of the present invention, the end of the first cylinder away from the flow impeller has a first connecting portion, and the end of the second cylinder away from the flow impeller has a second connecting portion.

[0014] In one embodiment of this utility model, both the first connecting part and the second connecting part are threaded structures.

[0015] In one embodiment of this utility model, the guide tube includes a cylinder and a guide wheel, and the outer peripheral wall of the cylinder abuts against the stop portion;

[0016] The cylinder has a flow channel, the guide wheel is fixedly installed in the flow channel, and the flow impeller is rotatably inserted into the guide wheel.

[0017] In one embodiment of this utility model, the cylinder and the guide wheel are an integral structure.

[0018] In one embodiment of this utility model, the blades of the guide wheel are arranged at an angle.

[0019] In one embodiment of this utility model, the outer shell is fixedly provided with an impeller fixing member inside the flow channel, and the flow impeller is rotatably connected to the impeller fixing member on the side facing away from the guide tube.

[0020] In one embodiment of this utility model, the impeller fixing member and the outer shell are an integral structure;

[0021] The outer peripheral wall of the impeller fixing component is connected to the inner peripheral wall of the flow channel.

[0022] In the technical solution of this utility model, the outer shell has a stop portion protruding on the inner peripheral wall of the flow channel. The guide tube is placed in the flow channel and abuts against the stop portion, making the fit between the guide tube and the outer shell tighter. This avoids the problems of loose retaining rings that are easy to fall off and tight ones that increase assembly difficulty in traditional designs. At the same time, by reducing the number of parts, the assembly steps can be reduced, thereby improving assembly efficiency. Furthermore, the risk of damage to parts due to improper assembly is also reduced due to the reduction in the number of parts. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the Hall flow meter provided by this utility model;

[0025] Figure 2 for Figure 1 sectional view of .

[0026] Explanation of icon numbers:

[0027] 10. Outer shell; 10a. Flow channel; 10b. Stop; 11. First cylinder; 12. Second cylinder; 111. First connecting part; 121. Second connecting part; 22. Guide tube; 21. Cylinder; 22. Guide wheel; 30. Flow impeller; 40. Impeller fixing part.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Please see Figure 1 and Figure 2 Hall effect flow meters include:

[0033] The outer casing 10 has a flow channel 10a and a stop portion 10b protruding from the inner peripheral wall of the outer casing 10.

[0034] The guide tube 22 is fitted inside the flow channel 10a, and the outer peripheral wall of the guide tube 22 abuts against the stop portion 10b; and

[0035] The flow impeller 30 is rotatably inserted into the side of the guide tube 22 facing away from the inlet end of the flow channel 10a;

[0036] The outer peripheral wall of the housing 10 has a Hall circuit with a Hall element, the blades of the flow impeller 30 have magnetic elements, and the Hall element is configured to sense the magnetic field generated by the magnetic element.

[0037] In the technical solution of this utility model, the outer shell 10 has a stop portion 10b protruding from the inner peripheral wall of the flow channel 10a. The guide tube 22 is placed in the flow channel 10a and abuts against the stop portion 10b, so that the fit between the guide tube 22 and the outer shell 10 is tighter. This avoids the problems of loose retaining rings that are easy to fall off and tight ones that increase assembly difficulty in traditional designs. At the same time, by reducing the number of parts, the assembly steps can be reduced, thereby improving assembly efficiency. Furthermore, due to the reduction in the number of parts, the risk of damage to parts caused by improper assembly is also reduced.

[0038] A Hall circuit is provided on the outer surface of the housing 10. The Hall circuit includes a sealed housing, a Hall element, an amplifier connected to the Hall element, wires, and other structures. There is a magnetic component inside the flow impeller 30. Driven by the fluid, the flow impeller 30 rotates, which causes the magnetic component to generate a magnetic field with a changing position. The Hall element senses the changing magnetic field and generates a current signal. The value of the current signal is positively correlated with the rotational speed of the flow impeller 30. During the detection process, the faster the fluid speed, the faster the magnetic field changes, and the larger the value of the current signal. The fluid velocity is calculated based on the amplified current signal value, thereby obtaining the flow rate.

[0039] Specifically, the inner peripheral wall of the flow channel 10a is provided with a stop 10b. The guide tube 22 is installed on one side of the water inlet end of the flow channel 10a. At the same time, the guide tube 22 and the flow channel 10a can adopt a transition fit or an interference fit to make the guide tube 22 clamped in the flow channel 10a, realizing a tight fit between the two. Meanwhile, the outer peripheral wall of the guide tube 22 abuts against the stop 10b. In this way, the guide tube 22 is fixed in the flow channel 10a, avoiding the problem of reduced detection accuracy due to loosening of the guide tube 22. A plug is provided on the side of the flow impeller 30 facing the water inlet end of the flow channel 10a, and a slot is provided on the side of the guide tube 22 facing away from the water inlet end of the flow channel 10a. The plug is inserted into the slot so that the flow impeller 30 can rotate under the drive of the flow, thereby realizing the flow detection function.

[0040] In one embodiment of the present invention, the stop portion 10b protrudes uniformly along the radial direction of the flow channel 10a. This design helps to distribute the fluid evenly, reduces the influence of eddies and turbulence, makes the impeller rotate more smoothly and responds faster, and also improves the contact tightness between the stop portion 10b and the flow impeller 30.

[0041] In one embodiment of this utility model, the outer shell 10 includes a first cylindrical body 11 and a second cylindrical body 12 with an integral structure. The inner diameter of the second cylindrical body 12 is smaller than the inner diameter of the first cylindrical body 11, so that a stop portion 10b is formed between the second cylindrical body 12 and the first cylindrical body 11. The guide tube 22 is located in the first cylindrical body 11, and the flow impeller 30 is located in the second cylindrical body 12. Specifically, the first cylindrical body 11 and the second cylindrical body 12 can be formed into a two-section cylindrical body 21 structure with different inner diameters in the mold by injection molding or hot melt process according to different materials. The connection between the first cylindrical body 11 and the second cylindrical body 12 forms a step structure due to the difference in inner diameter, thereby forming a uniformly raised stop portion 10b. The integral molding process can avoid the assembly between the first cylindrical body 11 and the second cylindrical body 12, thereby reducing the assembly difficulty of the Hall flow meter.

[0042] In one embodiment of this utility model, the end of the first cylinder 11 away from the flow impeller 30 has a first connecting part 111, and the end of the second cylinder 12 away from the flow impeller 30 has a second connecting part 121. In one embodiment, the first connecting part 111 and the second connecting part 121 can be a plug-in structure, and then the installation is sealed by waterproof tape. The connecting parts provided at the ends of the first cylinder 11 and the second cylinder 12 away from the flow impeller 30 can improve the structural stability and reliability of the Hall flow meter, and also enhance its convenience of installation and maintenance, and improve its adaptability and measurement accuracy.

[0043] In another embodiment, both the first connecting part 111 and the second connecting part 121 are threaded structures. The threaded structure provides stronger mechanical connection force, which can effectively resist the pressure and vibration brought by fluid flow, ensuring that the Hall flow meter will not loosen or leak during operation. This not only improves the connection firmness and sealing performance of the flow meter, but also facilitates installation and maintenance, thereby improving the overall performance and measurement accuracy of the flow meter.

[0044] In one embodiment of this utility model, the guide tube 22 includes a cylinder 21 and a guide wheel 22. The outer peripheral wall of the cylinder 21 abuts against the stop portion 10b. The cylinder 21 has a flow channel, and the guide wheel 22 is fixedly disposed in the flow channel. The flow impeller 30 is rotatably inserted into the guide wheel 22. Thus, the rectifying effect generated by the guide tube 22 ensures that the fluid flowing through the Hall flow meter is in a regular state, eliminating the adverse effects of turbulence and vortices on the flow meter and improving the flow state. At the same time, due to the uniformity of the fluid flow, the rotation of the impeller is more stable, thereby enabling the flow meter to measure the flow velocity and flow rate more accurately. Furthermore, the end of the cylinder 21 is along the flow channel 10a. Multiple notches are provided in the radial direction, and each notch extends along the axial direction of the flow channel 10a. Thus, when the guide tube 22 is installed into the flow channel 10a, a force is applied to the guide tube 22 in the radial direction of the flow channel 10a, so that the ends of the guide tube 22 with notches come together. Subsequently, after the guide tube 22 enters the flow channel 10a, the ends of the guide tube 22 with notches lose their constraint and are restored by deformation force. The outer diameter of the restored guide tube 22 is larger than the inner diameter of the outer shell 10. Thus, the outer peripheral wall of the guide tube 22 with notches can abut against the inner peripheral wall of the flow channel 10a, thereby achieving a tight fit between the guide tube 22 and the outer shell 10.

[0045] Furthermore, the cylinder 21 and the guide wheel 22 are an integral structure. This integral structure reduces the number of connection points between the two, thereby reducing the risk of failure due to improper connection or component damage.

[0046] In one embodiment, the blades of the guide wheel 22 are inclined. The inclined blades can change the direction of water flow and the velocity distribution, so that the fluid flows more evenly through the impeller, reducing the influence of turbulence and eddies, thereby improving the measurement accuracy and stability of the flow meter.

[0047] In one embodiment of this utility model, in order to ensure that the flow impeller 30 is not washed away by the water flow, the outer shell 10 is fixedly provided with an impeller fixing member 40 in the flow channel 10a. The side of the flow impeller 30 facing away from the guide tube 22 is rotatably connected to the impeller fixing member 40. In this way, the flow impeller 30 can only rotate in the area between the impeller fixing member 40 and the guide tube 22, ensuring that the flow impeller 30 rotates in alignment with the Hall element, thereby ensuring the detection accuracy of the Hall flow meter.

[0048] In one embodiment of this utility model, the impeller fixing member 40 and the outer shell 10 are an integral structure. The outer peripheral wall of the impeller fixing member 40 is connected to the inner peripheral wall of the flow channel 10a. In this way, the Hall flow meter does not need to be provided with additional connecting parts, thereby making the structure of the entire Hall flow meter more compact and integrated, reducing assembly costs and difficulties, and improving the reliability of the flow meter due to the reduction of connection points.

[0049] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A Hall effect flow meter, characterized in that, The Hall flow meter includes: The outer casing (10) is provided with a flow channel (10a) and a stop portion (10b) protrudes from the inner peripheral wall of the outer casing (10); A flow guide tube (20) is fitted inside the flow channel (10a), and the outer peripheral wall of the flow guide tube (20) abuts against the stop portion (10b); and A flow impeller (30) is rotatably inserted into the side of the guide tube (20) facing away from the inlet end of the flow channel (10a); The outer peripheral wall of the housing (10) has a Hall circuit, the Hall circuit has a Hall element, the blades of the flow impeller (30) have magnetic elements, and the Hall element is configured to sense the magnetic field generated by the magnetic elements.

2. The Hall effect flowmeter as described in claim 1, characterized in that, The stop portion (10b) protrudes uniformly along the radial direction of the flow channel (10a).

3. The Hall effect flow meter as described in claim 2, characterized in that, The outer shell (10) includes a first cylindrical body (11) and a second cylindrical body (12) of integral structure, wherein the inner diameter of the second cylindrical body (12) is smaller than the inner diameter of the first cylindrical body (11) so that the stop portion (10b) is formed between the second cylindrical body (12) and the first cylindrical body (11). The guide tube (20) is located in the first cylinder (11), and the flow impeller (30) is located in the second cylinder (12).

4. The Hall effect flow meter as described in claim 3, characterized in that, The first cylinder (11) has a first connecting portion (111) at the end away from the flow impeller (30), and the second cylinder (12) has a second connecting portion (121) at the end away from the flow impeller (30).

5. The Hall effect flow meter as described in claim 4, characterized in that, Both the first connecting part (111) and the second connecting part (121) are threaded structures.

6. The Hall effect flowmeter as described in any one of claims 1 to 5, characterized in that, The guide tube (20) includes a tube body (21) and a guide wheel (22), and the outer peripheral wall of the tube body (21) abuts against the stop part (10b); The cylinder (21) has a flow channel, the guide wheel (22) is fixedly installed in the flow channel, and the flow impeller (30) is rotatably inserted into the guide wheel (22).

7. The Hall effect flow meter as described in claim 6, characterized in that, The cylinder (21) and the guide wheel (22) are an integral structure.

8. The Hall effect flow meter as described in claim 6, characterized in that, The blades of the guide wheel (22) are arranged at an angle.

9. The Hall effect flowmeter as described in claim 1, characterized in that, The outer casing (10) is fixedly provided with an impeller fixing member (40) in the flow channel (10a), and the flow impeller (30) is rotatably connected to the impeller fixing member (40) on the side facing away from the guide tube (20).

10. The Hall effect flowmeter as described in claim 9, characterized in that, The impeller fixing component (40) and the outer casing (10) are an integral structure; The outer peripheral wall of the impeller fixing member (40) is connected to the inner peripheral wall of the flow channel (10a).

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