Hall flow sensor

Abstract

The invention relates to the technical field of sensors, in particular to a Hall flow sensor. Comprising a pipeline, a shell, a moving plate, a rubber layer, a Hall probe, a guide plate, an adjusting group, a permanent magnet and an impact plate, the permanent magnet is located in the shell, the communication position of the pipeline and the shell is sealed through the rubber layer and the moving plate, so that micro metal particles cannot be adsorbed on the permanent magnet, the influence on the flow monitoring precision is avoided, the height of the moving plate is controlled through the adjusting set, the sectional area of the flowing channel is controlled, and the flow monitoring precision is improved. Therefore, large flow or small flow can be detected, and the measurement range is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a Hall flow sensor. Background Art

[0002] Flow rate is an important parameter in industrial production and life. A flow sensor can measure the amount of fluid flowing through a certain cross-section of a pipe in unit time. For example, a flow sensor disclosed in Chinese Patent 201711400142.7 uses water flow to impact a moving magnetic part, causing the moving magnetic part to move, and then uses a Hall sensor to measure the change in magnetic force to obtain the flow rate of the fluid. However, this patent has two problems. First, there are micro metal particles in the water. When water impacts the moving magnetic part, the moving magnetic part will absorb the micro metal particles. After long-term use, the micro metal particles will accumulate on the surface of the moving magnetic part, causing the weight of the moving magnetic part to increase, thereby affecting the accuracy of the flow measurement. Second, since the cross-sectional area of ​​the pipeline is fixed, the moving magnetic part may not be moved when a small flow rate flows through the moving magnetic part, that is, it can only be used within a certain flow range, resulting in a narrow measurement range. Summary of the invention

[0003] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is a Hall flow sensor. First, the permanent magnet does not contact the fluid, so that the micro metal particles will not adhere to the permanent magnet. Second, the cross-sectional area of ​​the pipeline is adjusted according to the size of the flow rate, thereby increasing the flow measurement range. The present invention achieves the above purposes through the following technical solutions:

[0004] A Hall flow sensor comprises: a pipeline, a shell, a moving plate, a rubber layer, a Hall probe, a guide plate, an adjustment group, a permanent magnet, and an impact plate;

[0005] A moving plate, a rubber layer, a guide plate, and an adjustment group are arranged in the pipeline, and a Hall probe and a permanent magnet are arranged in the shell; the moving plate is arranged horizontally, and the moving plate and the bottom surface of the pipeline form a flow channel for the liquid, the top surface of the moving plate is arranged with a shaft, a slider 1 is nested on the shaft, a Hall probe is arranged at the upper end of the shaft, the slider 1 is slidably connected with the top surface of the pipeline, and a spring is arranged, and a baffle is arranged on the shaft; the moving plate is slidably connected with the impact plate; the rubber layer and the moving plate seal the connection between the pipeline and the shell; the guide plate guides the flow of liquid;

[0006] The adjustment group is used to control the height of the movable plate so that the Hall probe is located on the z-axis one or the z-axis two;

[0007] The permanent magnet is tilted, and the maximum distance between the Z-axis 1 and one end of the permanent magnet is smaller than the minimum distance between the Z-axis 2 and the other end of the permanent magnet. The magnetic value monitored by the Hall probe includes two kinds of information: flow velocity and cross-sectional area of ​​the flow channel. The Hall probe transmits the monitored magnetic value to a microcomputer, and different magnetic values ​​are stored in the microcomputer, and different magnetic values ​​correspond to different flow values.

[0008] Preferably, the movable plate is hingedly connected to the end of the guide plate, the guide plate is tilted, and one end of the guide plate tilted upward is hingedly connected to a slider three, and the slider three is slidably connected to the vertical wall of the pipeline.

[0009] Preferably, the adjustment group is arranged at one end of the movable plate, and the adjustment group includes: a limit plate, a transmission member 1, a transmission member 2, and a spring rod; the limit plate is vertically nested on the vertical wall surface of the pipeline, and a spring piece 2 is arranged at the connection between the limit plate and the pipeline, and a protrusion 1 and a protrusion 2 are respectively arranged at the upper and lower ends of the limit plate, and a slope 1 is arranged on the bottom surface of the protrusion 1 along the middle to one side, and a slope 2 is arranged on the top surface of the protrusion 2 along the middle to the other side; the transmission member 1 and the transmission member 2 have the same structure, and the transmission member 1 and the transmission member 2 are staggered up and down and arranged in reverse, and the transmission member 1 includes: an assembly plate 1, a floating block 1, and a push plate 2 , an extension plate 1, the transmission component 2 includes: an assembly plate 2, a floating block 2, a push plate 3, and an extension plate 2; a floating block 1 is arranged on the top surface of the assembly plate 1, one side of the assembly plate 1 is connected to the push plate 2, one end of the extension plate 1 is located above the assembly plate 2, and they are connected by a spring rod; the end of the extension plate 2 fits the bottom surface of the movable plate; a connecting piece is horizontally slidably provided on the bottom surface of one end of the movable plate, the connecting piece is vertically slidably connected to the inner wall of the pipe, a positioning plate is nested in the connecting piece, one end of the bottom surface of the positioning plate is a slope, and a spring piece 1 is arranged between the positioning plate and the connecting piece; a push plate 1 is arranged on the top surface of one end of the movable plate.

[0010] Beneficial effects of the present invention:

[0011] 1. The permanent magnet of the present invention is located in the shell, and the rubber layer and the movable plate seal the connection between the pipeline and the shell, so that the permanent magnet will not absorb micro metal particles, avoiding affecting the monitoring accuracy of the flow.

[0012] Second, the present invention controls the height of the movable plate through the adjustment group to control the cross-sectional area of ​​the flow channel, thereby being able to detect large or small flows and improving the measurement range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the movement of the adjustment plate of the present invention.

[0015] Figure 3 It is a schematic diagram of the structure of the regulating component of the present invention.

[0016] Figure 4 It is a schematic diagram of the structure of the limiting plate of the present invention.

[0017] Figure 5 It is a schematic diagram of the movement of the adjustment component of the present invention.

[0018] Figure 6 This is a schematic diagram of magnetic force detection distribution of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that it is easy for those with ordinary skills in the prior art to implement these embodiments. However, the present invention can also be implemented in various different forms. Therefore, the present invention is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, parts that are not connected with the invention will be omitted from the accompanying drawings.

[0020] like Figure 1 As shown, a Hall flow sensor comprises: a pipeline 1, a housing 2, a moving plate 3, a rubber layer 4, a Hall probe 5, a guide plate 6, an adjustment group 7, a permanent magnet 8, and an impact plate 9;

[0021] The pipeline 1 is provided with a moving plate 3, a rubber layer 4, a guide plate 6, and an adjustment group 7, the housing 2 is provided above the pipeline 1, and the housing 2 is provided with a Hall probe 5 and a permanent magnet 8;

[0022] like Figure 2As shown, the movable plate 3 is horizontally arranged, and the movable plate 3 and the bottom surface of the pipeline 1 form a flow channel 10 for the liquid. The top surface of the movable plate 3 is vertically arranged with an axis 31, and a slider 32 is nested on the axis 31. The slider 32 is connected to the slide rail 12 on the top surface of the pipeline 1, and the movable plate 3 can move along the Z axis and the Y axis through the axis 31 and the slider 32. A baffle is arranged on the axis 31, and the maximum rising height of the movable plate 3 is limited by the baffle. When a large flow of liquid is detected, the baffle fits with the slider 32 to prevent the movable plate 3 from rising due to the liquid pressure; a spring is arranged between the slider 32 and the top surface of the pipeline 1; the axis 31 extends upward into the shell 2, and the upper end of the axis 31 is connected to the Hall probe 5; a connecting rod 33 is arranged at one end of the movable plate 3, and a slider 2 34 is arranged at the end of the connecting rod 33, and the impact plate 9 is connected to the slider through the slide rail 2 91 The two 34 are connected, the slide rail two 91 is vertically arranged, and the two ends of the impact plate 9 in the horizontal direction are at a certain distance from the inner wall of the pipeline 1. When the liquid pushes the impact plate 9, the impact plate 9 drives the moving plate 3 to move along the Z axis; the cross-section of the rubber layer 4 is rectangular, one end of the rubber layer 4 is connected to the bottom surface of the pipeline 1, and the other end is connected to the top surface of the moving plate 3, so that the rubber layer 4 and the moving plate 3 seal the connection between the pipeline 1 and the shell 2; a push plate 35 is arranged on the top surface of one end of the moving plate 3, and a connecting piece 361 is horizontally slidably provided on the bottom surface of one end of the moving plate 3, and the connecting piece 361 is vertically slidably connected to the inner wall of the pipeline 1, and a positioning plate 36 is nested in the connecting piece 361, and one end of the bottom surface of the positioning plate 36 is a slope surface, and a spring piece 1 is arranged between the positioning plate 36 and the connecting piece 361, and when the moving plate 3 moves horizontally along the Z axis, the connecting piece 361 does not move synchronously with the moving plate 3;

[0023] The movable plate 3 is hingedly connected to the end of the guide plate 6, the guide plate 6 is tilted, and one end of the guide plate 6 tilted upward is hingedly connected to a slider 3 61, and the slider 3 61 is slidably connected to the vertical wall of the pipe 1. When the movable plate 3 moves along the Y axis, the guide plate 6 changes its tilt angle through the slider 3 61, so as to guide the water flow into the flow channel 10;

[0024] like Figure 3-5As shown, the adjustment group 7 is arranged at one end of the movable plate 3, and the adjustment group 7 includes: a limit plate 71, a transmission member 1 72, a transmission member 2 73, and a spring rod 74; the limit plate 71 is vertically nested on the vertical wall of the pipeline 1, and the limit plate 71 can slide horizontally. The connection between the limit plate 71 and the pipeline 1 is provided with a spring piece 2, and the upper and lower ends of the limit plate 71 are respectively provided with a protrusion 1 712 and a protrusion 2 713, and the bottom surface of the protrusion 1 712 is provided with a slope 1 7121 along the middle to one side, and the top surface of the protrusion 2 713 is provided with a slope 2 7131 along the middle to the other side; the transmission member 1 72 and the transmission member 2 73 have the same structure, and the transmission member 1 72 and the transmission member 2 73 are staggered up and down and arranged in reverse. The transmission member 1 72 includes: an assembly plate 1 721, a floating block 1 72 2. Push plate 2 723, extension plate 1 724, the transmission member 2 73 includes: assembly plate 2 731, floating block 2 732, push plate 3 733, extension plate 2 723; the top surface of the assembly plate 1 721 is provided with floating block 1 722, one side of the assembly plate 1 721 is connected to push plate 2 723, one end of the extension plate 1 724 is located above the assembly plate 2 731, and they are connected by a spring rod 74, the push plate 2 723 is used to push the slope 1 7121, and the push plate 3 733 is used to push the slope 2 7131; the end of the extension plate 2 723 is attached to the bottom surface of the moving plate 3; when the flow rate is large, the moving plate 3 is overlapped on the protrusion 1 712, and when the flow rate is small, the moving plate 3 is overlapped on the protrusion 2 713, thereby reducing the cross-sectional area of ​​the flow channel 10, that is, a small flow channel, and increasing the pressure of the liquid;

[0025] The action of the adjustment group 7 for adjusting the height of the movable plate 3 is as follows: when the flow rate decreases, the transmission member 2 73 drops with the water level, and when the water level drops to the bottom of the protrusion 2 713, the transmission member 2 73 pushes the slope 2 7131 of the protrusion 2 713 through the push plate 3 733, so that the limit plate 71 moves horizontally, and the protrusion 1 712 no longer supports the movable plate 3, wherein the elastic rod 74 is stretched during the descending process of the transmission member 2 73, so that the elastic rod 74 accumulates force, and the transmission member 1 72 pushes the movable plate 3 to quickly descend and overlap the protrusion 2 713, and the positioning plate 36 of the movable plate 3 fits the bottom surface of the protrusion 2 713 to prevent the movable plate 3 from being increased by the liquid pressure; when the flow rate increases, the transmission member 1 72 drops with the water level, and when the water level rises to the top of the protrusion 1 712, the transmission member 1 72 pushes the slope 1 712 of the protrusion 1 712 through the push plate 2 723 1, let the limit plate 71 move horizontally, the protrusion 2 713 no longer limits the moving plate 3, and the elastic rod 74 is stretched to store force during the rising process of the transmission member 1 72, and the transmission member 2 72 pushes the moving plate 3 to rise quickly. During the rising process of the moving plate 3, the push plate 1 35 of the moving plate 3 pushes the slope 1 7121, so that the limit plate 71 moves horizontally again, and the moving plate 3 is located above the protrusion 1 712 and overlaps the protrusion 1 712; the reason why the small flow channel is not used when the flow is large is that the moving distance of the slider 1 32 along the slide rail 12 is limited. When the large flow passes through the impact plate 9 to push the slider 1 32 to the end of the slide rail 12, even if the flow is reduced by a certain amount, the liquid pressure passing through the small flow channel is still large, so that the slider 1 32 is still located at the end of the slide rail 12, resulting in inaccurate detection results;

[0026] like Figure 6 As shown, the permanent magnet 8 is tilted, when the moving plate 3 is overlapped on the protrusion 1 712, the Hall probe 5 is located on the Z axis 1, when the moving plate 3 is overlapped on the protrusion 2 713, the Hall probe 5 is located on the Z axis 2, the maximum distance between the Z axis 1 and one end of the permanent magnet 8 is smaller than the minimum distance between the Z axis 2 and the other end of the permanent magnet 81, so that the magnetic value detected by the Hall probe 5 at any point on the Z axis 1 and the Z axis 2 is different; the magnetic value monitored by the Hall probe 5 includes two kinds of information: flow velocity and cross-sectional area of ​​the flow channel 10; the Hall probe 5 transmits the monitored magnetic value to the microcomputer, and different magnetic values ​​are stored in the microcomputer, and different magnetic values ​​correspond to different flow values. The magnetic value detected by the Hall probe 5 is compared with the different magnetic values ​​stored in the microcomputer to obtain the corresponding liquid flow.

[0027] Working principle of the present invention:

[0028] When the flow rate is large, the liquid pushes the impact plate 9 along the flow channel 10, and the impact plate 9 drives the Hall probe 5 to move along the z-axis through the moving plate 3 and the shaft 31. The Hall probe 5 detects the magnetic force value, thereby obtaining the flow value of the liquid;

[0029] When the flow rate is small, the water level drops and the moving plate 3 drops, reducing the cross-sectional area of ​​the flow channel 10 and increasing the pressure of the liquid. The liquid pushes the impact plate 9 along the flow channel 10. The impact plate 9 drives the Hall probe 5 to move along the z-axis 2 through the moving plate 3 and the shaft 31. The Hall probe 5 detects the magnetic value, thereby obtaining the flow value of the liquid.

Claims

1. A Hall flow sensor, comprising: A pipeline (1), a shell (2), a movable plate (3), a rubber layer (4), a Hall probe (5), a guide plate (6), an adjustment group (7), a permanent magnet (8), and an impact plate (9); characterized in that: the movable plate (3), the rubber layer (4), the guide plate (6), and the adjustment group (7) are arranged in the pipeline (1); the Hall probe (5) and the permanent magnet (8) are arranged in the shell (2); the movable plate (3) is arranged horizontally, and the movable plate (3) and the bottom surface of the pipeline (1) form a flow channel (1) for the liquid. 0), a shaft (31) is arranged on the top surface of the movable plate (3), a slider (32) is nested on the shaft (31), a Hall probe (5) is arranged on the upper end of the shaft (31), the slider (32) is slidably connected to the top surface of the pipeline (1), and a spring is arranged, and a baffle is arranged on the shaft (31); the movable plate (3) is slidably connected to the impact plate (9); the rubber layer (4) and the movable plate (3) seal the connection between the pipeline (1) and the housing (2); the guide plate (6) guides the flow of liquid; The adjustment group (7) is used to control the height of the movable plate (3) so that the Hall probe (5) is located on the z-axis 1 or the z-axis 2; The permanent magnet (8) is arranged obliquely, and the maximum distance between the Z axis 1 and one end of the permanent magnet (8) is smaller than the minimum distance between the Z axis 2 and the other end of the permanent magnet (81). The magnetic value monitored by the Hall probe (5) includes two types of information: flow velocity and cross-sectional area of ​​the flow channel (10). The Hall probe (5) transmits the monitored magnetic value to a microcomputer, and different magnetic values ​​are stored in the microcomputer, and different magnetic values ​​correspond to different flow values.

2. A Hall flow sensor according to claim 1, characterized in that: The movable plate (3) is hingedly connected to the end of the guide plate (6); the guide plate (6) is arranged tilted; one end of the guide plate (6) tilted upward is hingedly connected to a slider three (61); the slider three (61) is slidably connected to the vertical wall surface of the pipeline (1).

3. A Hall flow sensor according to claim 1, characterized in that: The adjustment group (7) is arranged at one end of the movable plate (3), and the adjustment group (7) comprises: a limit plate (71), a transmission member 1 (72), a transmission member 2 (73), and an elastic rod (74); the limit plate (71) is vertically nested on the vertical wall surface of the pipeline (1), a spring piece 2 is arranged at the connection between the limit plate (71) and the pipeline (1), and a convex block 1 (712) and a convex block 2 (713) are respectively arranged at the upper and lower ends of the limit plate (71), and the convex blocks 1 (712) and 713 are respectively arranged at the upper and lower ends of the limit plate (71). The bottom surface of the first (712) is provided with a slope surface 1 (7121) along the middle to one side, and the top surface of the second protrusion (713) is provided with a slope surface 2 (7131) along the middle to the other side; the transmission member 1 (72) and the transmission member 2 (73) have the same structure, the transmission member 1 (72) and the transmission member 2 (73) are staggered up and down, and are arranged in reverse. The transmission member 1 (72) includes: an assembly plate 1 (721), a floating block 1 (722), a push plate 2 (723), an extension plate 1 (724), the transmission member 2 (73) comprises: an assembly plate 2 (731), a floating block 2 (732), a push plate 3 (733), and an extension plate 2 (723); a floating block 1 (722) is arranged on the top surface of the assembly plate 1 (721), one side of the assembly plate 1 (721) is connected to the push plate 2 (723), one end of the extension plate 1 (724) is located above the assembly plate 2 (731), and the two are connected by a spring rod (74); the extension plate 2 (72 The end of the movable plate (3) is fitted into the bottom surface of the movable plate (3); a connecting piece (361) is horizontally slidably provided on the bottom surface of one end of the movable plate (3); the connecting piece (361) is vertically slidably connected to the inner wall of the pipe (1); a positioning plate (36) is nested in the connecting piece (361); one end of the bottom surface of the positioning plate (36) is a slope; a spring piece (3) is provided between the positioning plate (36) and the connecting piece (361); a push plate (35) is provided on the top surface of one end of the movable plate (3).

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