Self-adjusting flow sensor

Abstract

The invention relates to the technical field of sensors, in particular to a self-adjusting flow sensor. Comprising a pipeline, a guide piece, a movable block, a limiting piece, a convergent-divergent pipe, a fluid director, a turbine and a frequency sensor. The diameter of the convergent-divergent pipe is automatically adjusted so as to adjust the sectional area of the pipeline, namely, the sectional area of the pipeline is large when the flow is large, the sectional area of the pipeline is reduced when the flow is medium, the sectional area of the pipeline is further reduced when the flow is small, the pressure intensity of liquid is increased, and meanwhile the impact part of the liquid to the turbine is guided according to the flow; the portion where the liquid impacts the turbine is far away from the axis, the turbine can rotate conveniently, and therefore the flow detection range is wide.

Description

Technical Field

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

[0002] Flow sensors are used to detect the flow rate of a passing fluid, and the flow rate of the fluid is often affected by the size of the channel diameter. In the prior art, a turbine flow sensor uses the passing fluid to drive the turbine to rotate, measures the speed of the turbine rotation, and obtains the speed of the passing fluid, thereby calculating the flow rate. However, when the flow rate is small, since the diameter of the measuring channel is fixed and the size of the turbine is large, the turbine will rotate slowly or remain stationary, and the accuracy of the flow rate detection cannot be guaranteed. Therefore, the flow sensor in the prior art cannot adjust the diameter of the pipeline according to different flow ranges (i.e., large flow, small flow), resulting in a narrow flow detection 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 to provide a self-adjusting flow sensor. The scaling tube can automatically adjust the diameter of the flow rate, adjust the cross-sectional area of ​​the pipeline on the one hand, and change the flow direction of water on the other hand, so as to meet the monitoring needs of the flu sensor for different flow rates. The present invention achieves the above purpose through the following technical solutions:

[0004] A self-regulating flow sensor comprises: a pipeline, a guide, a moving block, a stopper, a zoom tube, a flow guide, a turbine, and a frequency sensor;

[0005] The guide, moving block, stopper, and zoom tube are sequentially arranged in the water inlet end of the pipeline, the guide plate and turbine are located at the water outlet end of the pipeline, and the frequency sensor is located above the turbine; the guide is composed of cone-shaped bodies connected to each other, and a rectangular opening is opened on the cone;

[0006] The movable block is arranged in the tube, a spring is arranged between the movable block and the conical body, a rectangular rod is arranged at one end of the movable block, the rectangular rod passes through the rectangular opening, a plurality of grooves are extended along the surface of the movable block toward the axis, and limiting grooves are arranged on the opposite wall surfaces of the grooves, respectively, and the limiting grooves are used to limit the limiting member, so as to control the diameter of the zoom tube through the limiting member;

[0007] The number of the limiting members is the same as that of the grooves, and the limiting members include: a connecting plate and a limiting rod, one end of the connecting plate is slidably connected to the conical body, the middle of the connecting plate is nested in the limiting groove, and a plurality of limiting rods abut against the wall surface of the zoom tube; the zoom tube is formed by curling an elastic plate;

[0008] There are two deflectors, a turbine is arranged between the two deflectors, the deflector comprises: a splitter plate, a shaft, an inner tube 1, and an outer tube 1. There are multiple deflectors, and the two ends of the multiple deflectors are respectively fixed to the inner wall of the pipeline and the shaft, and the outer tube 1 wraps the inner tube 1 and the shaft; multiple blades of the turbine are provided with multiple notches, and the ends of the inner tube 1 and the outer tube 1 in the two deflectors are nested in the multiple notches, and the multiple blades are provided with an inner tube 2 and an outer tube 2, and the inner tube 2 and the outer tube 2 correspond to the inner tube 1 and the outer tube 1, and a permanent magnet is arranged on the turbine.

[0009] Preferably, three modes can be adjusted by changing the diameter of the zoom tube, namely, a large flow mode, a medium flow mode, and a small flow mode; three micro-touch switches are arranged on the inner wall of the tube, and the three micro-touch switches correspond to three values ​​of the distance between the zoom tube and the pipeline, namely, in the large flow mode, the distance between the zoom tube and the pipeline is large; in the medium flow mode, the distance between the zoom tube and the pipeline is medium; in the small flow mode, the distance between the zoom tube and the pipeline is small.

[0010] Preferably, the limiting groove is composed of three U-shaped grooves arranged obliquely and connected to each other, and the three U-shaped grooves are used to adjust the diameter of the zoom tube. Furthermore, the U-shaped groove is composed of horizontal groove one, vertical groove one, horizontal groove two, and vertical groove two, wherein the length of horizontal groove one is greater than that of horizontal groove two, and the upper and lower U-shaped grooves are connected through horizontal groove one and horizontal groove two, and magnet one is provided at the connection point between horizontal groove one and vertical groove two; magnet two is respectively provided on the two side walls in the middle of the connecting plate, and magnet two is nested in the limiting groove.

[0011] Preferably, the frequency sensor is internally provided with a magnetic steel and a coil, and the frequency sensor can periodically cut the magnetic flux lines of the permanent magnet, thereby generating an induction signal in the coil; the frequency sensor sends the induction signal to the signal processor, and the signal processor amplifies, filters, and processes the induction signal to accurately calculate the changing frequency of the induction signal, and the speed of the turbine can be accurately calculated by the changing frequency of the induction signal.

[0012] Beneficial effects of the present invention:

[0013] The present invention automatically adjusts the diameter of the convergent tube to adjust the cross-sectional area of ​​the pipeline, that is, the cross-sectional area of ​​the pipeline is large when the flow rate is large, the cross-sectional area of ​​the pipeline is reduced when the flow rate is medium, and the cross-sectional area of ​​the pipeline is further reduced when the flow rate is small, thereby increasing the pressure of the liquid and guiding the impact position of the liquid on the turbine according to the flow rate. That is, when the flow rate decreases, the position where the liquid impacts the turbine is far away from the axis, which is convenient for the turbine to rotate, thereby widening the range of flow detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 The local decomposition structure of the present invention is shown in FIG. Figure 1 .

[0016] Figure 3 It is a schematic diagram of the limiting column structure of the present invention.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the moving block of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of the limiting member of the present invention.

[0019] Figure 6 It is a schematic diagram of the structure of the zoom tube of the present invention.

[0020] Figure 7 The local decomposition structure of the present invention is shown in FIG. Figure 2 .

[0021] Figure 8 It is a schematic diagram of the cross-sectional structure of the deflector of the present invention.

[0022] Fig. 9 It is a schematic diagram of the expansion of the convergent tube of the present invention. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1 As shown, a self-regulating flow sensor comprises: a pipeline 1, a guide 2, a moving block 3, a stopper 4, a zoom tube 5, a flow guide 6, a turbine 7, and a frequency sensor 8;

[0025] The two ends of the pipeline 1 are respectively a water inlet end and a water outlet end. The guide member 2, the moving block 3, the stopper 4, and the zoom tube 5 are sequentially located in the water inlet end of the pipeline 1. The zoom tube 5 is used to adjust the cross-sectional area of ​​the pipeline 1 on the one hand, and guide the flow of liquid on the other hand. By changing the diameter of the zoom tube 5, three modes can be adjusted, namely, a large flow mode, a medium flow mode, and a small flow mode. The guide plate 6 and the turbine 7 are located at the water outlet end of the pipeline 1, and the frequency sensor 8 is located above the turbine 7;

[0026] like Figure 2-3As shown, the guide member 2 is composed of a cone 21 and a tube 22, the cone 21 and the tube 22 are connected at the ends, and the axes are in the same straight line, the axis of the cone 21 is provided with a rectangular opening 211, the rectangular opening 211 is connected with the inner cavity of the tube 22, a plurality of slide grooves 212 are arranged along the axis of the cone 21 facing the water outlet end of the pipeline 1, the tube 22 is connected to the inner wall of the pipeline 1 through a plurality of connecting plates 20, and three micro-touch switches 23 are arranged on the inner wall of the tube 22, and the three micro-touch switches 23 correspond to three kinds of distance values ​​between the zoom tube 5 and the pipeline 1, namely, in large flow mode, the distance value between the zoom tube 5 and the pipeline 1 is large; in medium flow mode, the distance value between the zoom tube 5 and the pipeline 1 is medium; in small flow mode, the distance value between the zoom tube 5 and the pipeline 1 is small; the flow rate of the liquid is calculated by combining the distance value between the zoom tube 5 and the pipeline 1 with the rotation speed of the turbine 7;

[0027] The movable block 3 is arranged in the tube 22, a spring is arranged between the movable block 3 and the cone 21, a rectangular rod 32 is arranged at the axis of one end of the movable block 3, the rectangular rod 32 passes through the rectangular opening 211, the side of the rectangular rod 32 facing the water inlet end of the pipeline 1 is the impact surface, the liquid pushes the impact surface of the rectangular rod 32, so that the movable block 3 is located at the end of the tube 22, when the impact force of the liquid decreases, the movable block 3 moves toward the cone 21, and triggers three micro-touch switches one by one during the movement, the movable block 3 has a plurality of grooves 31 extending along the surface toward the axis, and the plurality of grooves 31 correspond to a plurality of slide grooves 212 respectively, such as Figure 4 As shown, the relative wall surfaces of the groove 31 are respectively provided with limiting grooves 33, and the limiting grooves 33 are composed of three U-shaped grooves arranged obliquely and connected to each other. The three U-shaped grooves are used to adjust the diameter of the zoom tube 5. Further, the U-shaped groove is composed of a horizontal groove 1 331, a vertical groove 1 332, a horizontal groove 2 334, and a vertical groove 2 333, wherein the length of the horizontal groove 1 331 is greater than that of the horizontal groove 2 334, and the upper and lower U-shaped grooves are connected through the horizontal groove 1 331 and the horizontal groove 2 334, and a magnet 1 34 is provided at the connection between the horizontal groove 1 331 and the vertical groove 2 333, and the three U-shaped grooves are respectively a U-shaped groove 1 33-1, a U-shaped groove 2 33-2, and a U-shaped groove 3 33-3;

[0028] The number of the limiting members 4 is the same as that of the grooves 31, and the limiting members 4 include: a connecting plate 41, a limiting rod 42, a slider 411 is provided at one end of the connecting plate 41, and the slider 411 is nested in the slide groove 212 of the cone 21, two magnets 412 are provided on both side walls of the middle of the connecting plate 41, and the two magnets 412 are nested in the limiting groove 33, and a baffle 413 is provided at the other end of the connecting plate 41, and the limiting rod 42 is connected to the other end of the connecting plate 41, and a plurality of the limiting rods 42 abut against the wall of the zoom tube 5;

[0029] like Figure 6 As shown, the zoom tube 5 is formed by curling an elastic plate. When there is no restriction from the plurality of limit rods 42, the zoom tube 5 gradually expands in diameter through elasticity.

[0030] When the liquid flow rate decreases, the moving block 3 approaches the cone 21, and the second magnet 412 moves along the horizontal groove 1 331. When passing through the connection between the horizontal groove 1 331 and the second vertical groove 333, the second magnet 412 is attracted by the first magnet 24 to prevent the second magnet 412 from moving into the second horizontal groove 334 by the elastic force of the zoom tube 5. As the second magnet 412 moves horizontally, the contact area between the first magnet 24 and the second magnet 412 gradually decreases, that is, the attraction between the first magnet 24 and the second magnet 412 is weakened, thereby facilitating separation. When the second magnet 412 moves to the connection between the horizontal groove 1 331 and the vertical groove 1 332, the second magnet 412 moves to the horizontal groove 1 331 of the U-shaped groove 2 33-2 by the elastic force of the zoom tube 5. 31, the diameter of the zoom tube 5 increases, and then the limiting rod 42 continues to limit the zoom tube 5, at this time, the distance value between the zoom tube 5 and the pipeline 1 decreases; when the liquid flow increases, the moving block 3 moves away from the conical body 21, and the second magnet 412 moves along the horizontal groove 1 331 of the second U-shaped groove 33-2 to the horizontal groove 2 334 of the second U-shaped groove 33-1. When the second magnet 412 moves to the connecting part of the second horizontal groove 334 and the second vertical groove 333, the second magnet 412 is attracted by the first magnet 24, so that the second magnet 412 moves to the horizontal groove 1 331 of the U-shaped groove 1 33-1, thereby squeezing the zoom tube 5 through the limiting rod 42 to reduce its diameter, and at this time, the distance value between the zoom tube 5 and the pipeline 1 increases;

[0031] like Figure 7 As shown, the number of the guides 6 is two, and a turbine 7 is arranged between the two guides 6. The guide 6 comprises: a splitter plate 61, a shaft 62, an inner tube 1 63, and an outer tube 1 64. The number of the splitter plates 61 is multiple, and one end of the multiple splitter plates 61 is fixed to the inner wall of the pipeline 1, and the other end is fixed to the shaft 62. The splitter plates 61 have a certain inclination angle, so as to guide the liquid to impact the turbine 7. The outer tube 1 64 wraps the inner tube 1 63, and the inner tube 1 63 wraps the shaft 62. The baffle 413 in the limiting member 4 and the multiple splitter plates 61 limit the two ends of the convergent tube 5.

[0032] A plurality of notches 72 are provided on the plurality of blades 71 of the turbine 7, and the ends of the inner tube 1 63 and the outer tube 1 64 in the two deflectors 6 are nested in the plurality of notches 72. An inner tube 2 73 and an outer tube 2 74 are provided on the plurality of blades 71, and the inner tube 2 73 and the outer tube 2 74 correspond to the inner tube 1 63 and the outer tube 1 64. A permanent magnet (not shown in the figure) is provided on the turbine 7;

[0033] like Figure 8 As shown, in the large flow mode, the liquid impacts the entire blade 71; in the medium flow mode, the liquid flows between the inner tube 63 and the pipeline 1, and impacts the middle to the end of the blade 71; in the small flow mode, the liquid flows between the outer tube 63 and the pipeline 1, and impacts the end of the blade 71; the farther the part where the liquid impacts the turbine 7 is from the axis, the faster the rotation speed of the turbine 7 is, so when the liquid flow decreases, the farther the part where the liquid impacts the turbine 7 is from the axis, which is more convenient to drive the turbine 7 to rotate;

[0034] The frequency sensor 8 is provided with a magnetic steel and a coil inside. The frequency sensor 8 can periodically cut the magnetic flux lines of the permanent magnet, thereby generating an induction signal in the coil; the frequency sensor 8 sends the induction signal to the signal processor, and the signal processor amplifies, filters, and processes the induction signal to accurately calculate the changing frequency of the induction signal. The changing frequency of the induction signal can be used to accurately calculate the rotation speed of the turbine 7.

[0035] Working principle of the present invention:

[0036] like Fig. 9 As shown in A, when the flow rate is large, it is a large flow mode, the U-shaped groove 1 33-1 limits the magnet 2 412, the distance between the zoom tube 5 and the pipeline 1 is large, and the liquid flows along the axis 62 and the pipeline 1, impacting the integral blade 71 to calculate the flow rate of the liquid;

[0037] like Fig. 9 As shown in B, when the flow rate is medium, it is the medium flow mode, the U-shaped groove 2 33-2 limits the magnet 2 412, the distance between the zoom tube 5 and the pipeline 1 is reduced, the pressure of the liquid is increased, and the liquid flows along the inner tube 1 63 and the pipeline 1, impacting the middle to the end of the blade 71 to calculate the flow rate of the liquid;

[0038] like Fig. 9 As shown in C, when the flow rate is small, it is a small flow mode, the U-shaped groove three 33-3 limits the magnet two 412, the distance between the zoom tube 5 and the pipeline 1 is further reduced, and the pressure of the liquid is further increased. The liquid flows along the outer tube 64 and the pipeline 1, and impacts the end of the blade 71 to calculate the flow rate of the liquid.

Claims

1. A self-regulating flow sensor, comprising: A pipeline (1), a guide member (2), a moving block (3), a stopper (4), a zoom tube (5), a guide (6), a turbine (7), and a frequency sensor (8); characterized in that the guide member (2), the moving block (3), the stopper (4), and the zoom tube (5) are sequentially arranged in the water inlet end of the pipeline (1); the guide plate (6) and the turbine (7) are arranged at the water outlet end of the pipeline (1); and the frequency sensor (8) is located above the turbine (7); the guide member (2) is composed of a cone (21) and a tube (22) connected to each other, and a rectangular opening (211) is opened on the cone (21); The movable block (3) is arranged in the tube (22), a spring is arranged between the movable block (3) and the conical body (21), the movable block (3) is provided with a rectangular rod (32), the rectangular rod (32) passes through the rectangular opening (211), the movable block (3) has a plurality of grooves (31) extending along the surface toward the axis, and the opposite wall surfaces of the grooves (31) are respectively provided with limiting grooves (33), the limiting grooves (33) are used to limit the limiting member (4), and then the diameter of the zoom tube (5) is controlled by the limiting member (4); The number of the limiting members (4) is the same as that of the grooves (31), and the limiting members (4) include: a connecting plate (41) and a limiting rod (42); one end of the connecting plate (41) is slidably connected to the conical body (21); the middle of the connecting plate (41) is nested in the limiting groove (33); and a plurality of limiting rods (42) abut against the wall surface of the zoom tube (5); the zoom tube (5) is formed by curling an elastic plate; The number of the deflectors (6) is two, and the deflectors (6) comprise: a splitter plate (61), a shaft (62), an inner tube one (63), and an outer tube one (64). The number of the splitter plates (61) is multiple, and the two ends of the multiple splitter plates (61) are respectively fixed to the inner wall of the pipeline (1) and the shaft (62), and the outer tube one (64) wraps the inner tube one (63) and the shaft (62); multiple blades (71) of the turbine (7) are provided with multiple notches (72), and the ends of the inner tube one (63) and the outer tube one (64) in the two deflectors (6) are nested in the multiple notches (72), the multiple blades (71) are provided with an inner tube two (73) and an outer tube two (74), and the turbine (7) is provided with a permanent magnet.

2. A self-regulating flow sensor according to claim 1, characterized in that: By changing the diameter of the zoom tube (5), three modes can be adjusted, namely, a large flow mode, a medium flow mode, and a small flow mode; three micro-touch switches (23) are arranged on the inner wall surface of the tube (22), and the three micro-touch switches (23) correspond to three values ​​of the spacing between the zoom tube (5) and the pipeline (1), namely, in the large flow mode, the spacing between the zoom tube (5) and the pipeline (1) is large; in the medium flow mode, the spacing between the zoom tube (5) and the pipeline (1) is medium; and in the small flow mode, the spacing between the zoom tube (5) and the pipeline (1) is small.

3. A self-regulating flow sensor according to claim 1, characterized in that: The limiting groove (33) is composed of three U-shaped grooves arranged obliquely and connected to each other. The three U-shaped grooves are used to adjust the diameter of the zoom tube (5). Further, the U-shaped groove is composed of a horizontal groove 1 (331), a vertical groove 1 (332), a horizontal groove 2 (334), and a vertical groove 2 (333), wherein the length of the horizontal groove 1 (331) is greater than that of the horizontal groove 2 (334), and the upper and lower U-shaped grooves are connected through the horizontal groove 1 (331) and the horizontal groove 2 (334). A magnet 1 (34) is provided at the connection point between the horizontal groove 1 (331) and the vertical groove 2 (333); and magnets 2 (412) are respectively provided on the two side walls of the middle part of the connecting plate (41), and the magnets 2 (412) are nested in the limiting groove (33).

4. A self-regulating flow sensor according to claim 1, characterized in that: The frequency sensor (8) is provided with a magnetic steel and a coil inside, and the frequency sensor (8) periodically cuts the magnetic flux lines of the permanent magnet, thereby generating an induction signal in the coil; the frequency sensor (8) sends the induction signal to the signal processor, and the signal processor amplifies, filters, and processes the induction signal to accurately calculate the changing frequency of the induction signal.

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