CN218673751U

CN218673751U - Miniaturized flow sensor device

Info

Publication number: CN218673751U
Application number: CN202223237806.1U
Authority: CN
Inventors: 陈登科; 陆灿; 林雨畅; 杨毛毛
Original assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Current assignee: Jinhua Hongchang Electrlcal Equipment Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-03-21
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a miniaturized flow sensor device, which comprises a shell and an upper cover, wherein the shell is provided with a water outlet, the upper cover is provided with a water inlet, a magnetic impeller is arranged in the shell, the magnetic impeller at least comprises an N-pole blade and an S-pole blade, a rotating shaft synchronously rotating with the magnetic impeller is arranged in the magnetic impeller, and each N-pole blade and each S-pole blade are alternately distributed on the outer layer of the rotating shaft; a first positioning seat and a second positioning seat are respectively arranged at two ends of the rotating shaft, the first positioning seat is arranged close to the water outlet, and the second positioning seat is arranged close to the water inlet; the upper cover is abutted against the second positioning seat, and the first positioning seat and the second positioning seat are coaxially arranged; a Hall element is arranged outside the shell and faces the magnetic impeller; the utility model discloses impeller and magnetic material integrated into one piece, the blade polarity of two arbitrary adjacent settings is different, and hall circuit board can receive in proper order like this and switch on or stop signal, and the testing process is reliable and the precision is high.

Description

Miniaturized flow sensor device

Technical Field

The utility model belongs to the technical field of flow sensor, concretely relates to miniaturized flow sensor device.

Background

With the development of social productivity, the flow sensor is widely applied to production and life of people. The common flow sensor is a Hall turbine sensor, the sensor usually comprises an impeller, magnetic steel and a Hall circuit board arranged on the outer layer of a shell, the impeller is impacted to rotate when flowing water passes through the shell, the magnetic steel synchronously rotates, and the magnetic steel can send periodic signals to the Hall circuit board while rotating; the Hall circuit board receives the continuous circulation of the signals of the connection and the disconnection, so that a pulse signal synchronous with the rotating speed of the impeller is sent out, and the signals are converted into the flow of the liquid passing through the sensor after being amplified and processed. However, the magnetic steel of the existing hall sensor is usually installed at one end of the impeller, the axial direction of the magnetic steel is not limited, the magnetic steel can move along with the axial direction of the impeller, and the distance between the magnetic steel and the hall circuit board can change, so that a signal generated by the hall circuit board can be unstable; when the magnetic steel is far away from the Hall circuit board, the generated pulse signal is weak, and the converted flow is not accurate enough. Meanwhile, only one piece of magnetic steel is often installed on the existing impeller, and the distance between the magnetic steel and the Hall sensor is easy to fluctuate, so that the Hall sensor cannot normally detect signals. Therefore, a need exists to design a miniaturized flow sensor device to overcome the above difficulties.

Disclosure of Invention

The utility model discloses to the problem that exists among the prior art, designed a miniaturized flow sensor device, the utility model discloses impeller and magnetic material integrated into one piece, every blade of impeller magnetizes alone and makes the blade whole have a polarity, and the blade polarity of two arbitrary adjacent settings is different, and hall circuit board can receive in proper order like this and switch on or stop signal, and the testing process is reliable and the precision is high.

The invention aims to be realized by the following technical scheme: a miniaturized flow sensor device comprises a shell and an upper cover, wherein a water outlet is formed in the shell, a water inlet is formed in the upper cover, a magnetic impeller capable of rotating relative to the shell is arranged in the shell, the magnetic impeller at least comprises an N-pole blade and an S-pole blade, and each N-pole blade and each S-pole blade are arranged in pairs; a rotating shaft which synchronously rotates with the magnetic impeller is arranged in the magnetic impeller, and each N-pole blade and each S-pole blade are alternately distributed on the outer layer of the rotating shaft; a first positioning seat and a second positioning seat which are movably connected with the rotating shaft are respectively arranged at two ends of the rotating shaft, and the first positioning seat is arranged in the shell and is close to the water outlet; the second positioning seat is arranged at the other end of the shell and close to the water inlet, the upper cover is abutted against the second positioning seat, and the first positioning seat and the second positioning seat are coaxially arranged; and a Hall element is arranged outside the shell and is arranged towards the magnetic impeller.

Preferably, the center of the magnetic impeller is provided with a cylindrical channel for mounting the rotating shaft, a limiting bulge is arranged in the cylindrical channel, the outer layer of the rotating shaft is provided with an inner concave part for mounting the limiting bulge, and the outline of the inner concave part is matched with the outline of the limiting bulge.

The magnetic impeller is provided with a cylindrical channel, the rotating shaft is arranged on the cylindrical channel and is mutually limited through the inner concave part and the limiting protrusion, so that the magnetic impeller and the rotating shaft are always kept in a coaxial state, and the rotating shaft can drive the magnetic impeller to stably rotate while rotating.

Preferably, the outer layer of the cylindrical channel is provided with N pole blades and S pole blades which are uniformly distributed, and the N pole blades and the S pole blades are distributed on the outer layer of the cylindrical channel in a circumferential array; the N pole blade and the S pole blade extend along the axial direction of the rotating shaft, and the rotating shaft and the cylindrical channel are coaxially arranged.

The outer layer of the cylindrical channel is provided with N pole blades and S pole blades with different polarities, and the N pole blades and the S pole blades are alternately arranged, so that the Hall element can alternately receive a switching-on or switching-off signal, and the flow of water flow in the shell can be calculated through signal conversion.

Preferably, the end surfaces of the N-pole blades and the S-pole blades facing the first positioning seat are arranged in the same plane, and the end surfaces of the N-pole blades and the S-pole blades facing the second positioning seat are arranged in the same plane; the N pole blade and the S pole blade are both in spiral twisted shapes, and included angles exist between the N pole blade and the S pole blade and the water flow direction.

The whole body of each blade is provided with one polarity independently, and the position of each blade can be obtained through a circumferential array; because the end surfaces of the N pole blade and the S pole blade, which face the first positioning seat, are arranged in the same plane, and the end surfaces of the N pole blade and the S pole blade, which face the second positioning seat, are arranged in the same plane, the magnetic impeller can be kept stable in the rotating process and cannot interfere with the first positioning seat or the second positioning seat.

Preferably, the number of the N pole blades and the number of the S pole blades are the same and are alternately distributed on the outer layer of the cylindrical channel, and the sum of the number of the N pole blades and the number of the S pole blades is an even number.

The number of the N pole blades and the number of the S pole blades are the same, the N pole blades and the S pole blades are arranged in pairs, and when only one N pole blade and one S pole blade are arranged on the outer layer of the cylindrical channel, the Hall element can receive alternate signals; when the N pole blade faces the Hall element, the Hall element can send a conducting signal to the control circuit board; when the S pole blade faces the Hall element, the Hall element sends a cut-off signal to the control circuit board. Similarly, when the outer layer of the cylindrical channel is provided with a plurality of N pole blades and a plurality of S pole blades, the Hall element can alternately send a switching-on or switching-off signal to the control circuit board.

Preferably, the first positioning seat comprises a first shaft sleeve, a first mounting column and a plurality of first supporting sheets which are uniformly distributed between the first shaft sleeve and the first mounting column; each first supporting sheet is distributed on the outer layer of the first mounting column in a circumferential array, and extends along the axial direction where the first mounting column is located.

One end of the rotating shaft is arranged on the first positioning seat, and the magnetic impeller can rotate relative to the first positioning seat when water flow impacts the magnetic impeller; because the first support piece is arranged on the outer layer of the first mounting column, the rotating shaft is more stably mounted on the positioning seat.

Preferably, each first supporting sheet is arranged in parallel with the water flow direction; the distance between the first mounting column and the magnetic impeller is smaller than the distance between the first shaft sleeve and the magnetic impeller; the first shaft sleeve is arranged in the shell, and a first step for placing the first shaft sleeve is arranged in the shell; be equipped with the first recess that is used for installing the pivot in the first erection column, first recess is cylindricly, the internal diameter of first recess is the same with the external diameter of pivot.

The rotating shaft is arranged in the first groove, so that the first groove can position the rotating shaft, the rotating shaft and the first groove can keep the coaxial state, the rotating process of the rotating shaft is more stable, and the distance between the magnetic impeller on the rotating shaft and the Hall element cannot generate larger fluctuation. The first shaft sleeve is arranged on the first step, so that the first positioning seat does not have axial displacement relative to the shell, and the first positioning seat and the shell are always kept in a relative static state.

Preferably, the second positioning seat comprises a second shaft sleeve, a second mounting column and a plurality of second supporting sheets uniformly distributed between the second shaft sleeve and the second mounting column; each second supporting sheet is distributed on the outer layer of the second mounting column in a circumferential array, and extends along the axial direction where the second mounting column is located; a second groove for mounting the rotating shaft is formed in the second mounting column, the second groove is cylindrical, and the inner diameter of the second groove is the same as the outer diameter of the rotating shaft; the second shaft sleeve is arranged in the shell, and a second step for placing the second shaft sleeve is arranged in the shell; and a third step for placing the upper cover is further arranged on the second shaft sleeve, and the third step is arranged back to the magnetic impeller.

The tail end of the rotating shaft is arranged in the second groove, so that the rotating shaft is positioned through the second groove, and the rotating process of the rotating shaft is more stable; the second step for placing the second shaft sleeve is arranged in the shell, so that the second positioning seat can keep a static state relative to the shell, and the rotating shaft is installed on the second positioning seat more stably. The upper cover presses on the second positioning seat, so that the second positioning seat cannot be separated from the shell.

Preferably, the shell is further provided with a fourth step for placing the upper cover, and the fourth step is arranged close to the water inlet; and a sealing ring is arranged between the second shaft sleeve and the upper cover, and the outer layer of the sealing ring is tightly attached to the inner wall of the shell.

The fourth step is arranged, so that the upper cover is conveniently and axially positioned; meanwhile, a sealing ring is arranged between the upper cover and the shell, so that water flow is prevented from overflowing from the shell.

Compared with the prior art, the utility model discloses following beneficial effect has: the magnetic impeller of the utility model is arranged on the rotating shaft and rotates synchronously with the rotating shaft, one end of the rotating shaft is arranged on the first positioning seat, and the other end of the rotating shaft is arranged on the second positioning seat; because the first positioning seat and the second positioning seat are coaxially arranged with the rotating shaft, the radial distance between the rotating shaft and the Hall element is kept unchanged; be equipped with the clearance of stepping down between the end of pivot and first positioning seat or the second positioning seat, because the axial extension of the last blade of magnetic impeller extension pivot, the axial length of blade is far more than the clearance of stepping down, the axial displacement of the relative casing of magnetic impeller is little like this, and hall element can accept the signal that magnetic impeller produced all the time, and magnetic impeller rotates steadily under the impact of rivers, just so can reliably detect out the flow of rivers. Meanwhile, each blade of the magnetic impeller is independently provided with a polarity, and the N-pole blade and the S-pole blade are alternately arranged on the outer layer of the rotating shaft, so that the Hall element can alternately receive a cut-off signal or a turn-on signal. Consequently the utility model discloses can stabilize received signal, the process of measuring flow is reliable and accurate.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is an internal structural view of the present invention;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is a perspective view of a magnetic impeller;

fig. 5 is a perspective view of the second positioning seat;

FIG. 6 is a perspective view of the first positioning block;

fig. 7 is an internal structure view of the housing.

The labels in the figure are: 1. a housing; 2. an upper cover; 3. a water outlet; 4. a water inlet; 5. a magnetic impeller; 51. an N-pole blade; 52. an S-pole blade; 53. a rotating shaft; 54. a cylindrical channel; 55. a limiting bulge; 6. a first positioning seat; 61. a first bushing; 62. a first mounting post; 63. a first support sheet; 64. a first groove; 7. a second positioning seat; 71. a second shaft sleeve; 72. a second mounting post; 73. a second support sheet; 74. a second groove; 8. an inner concave portion; 9. a first step; 10. a second step; 11. a third step; 12. a fourth step; 13. a seal ring; 14. a Hall element.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in fig. 1 to 7, the present embodiment discloses a miniaturized flow sensor device, which includes a housing 1 and an upper cover 2, wherein the housing 1 is provided with a water outlet 3, the upper cover 2 is provided with a water inlet 4, the housing 1 is provided with a magnetic impeller 5 capable of rotating relative to the housing, the magnetic impeller 5 at least includes an N-pole blade 51 and an S-pole blade 52, and each of the N-pole blade 51 and the S-pole blade 52 are provided in pairs; a rotating shaft 53 which synchronously rotates with the magnetic impeller 5 is arranged in the magnetic impeller 5, and each N-pole blade 51 and each S-pole blade 52 are alternately distributed on the outer layer of the rotating shaft 53; a first positioning seat 6 and a second positioning seat 7 which are movably connected with the rotating shaft 53 are respectively arranged at two ends of the rotating shaft 53, and the first positioning seat 6 is installed in the shell 1 and is close to the water outlet 3; the second positioning seat 7 is installed at the other end of the shell 1 and is close to the water inlet 4, the upper cover 2 is abutted against the second positioning seat 7, and the first positioning seat 6 and the second positioning seat 7 are coaxially arranged; the housing 1 is provided with a hall element 14 on the outside, which hall element 14 is arranged towards the magnetic impeller 5.

The magnetic impeller 5 is characterized in that a cylindrical channel 54 used for mounting a rotating shaft 53 is arranged in the center of the magnetic impeller 5, a limiting protrusion 55 is arranged in the cylindrical channel 54, an inner concave portion 8 used for mounting the limiting protrusion 55 is arranged on the outer layer of the rotating shaft 53, and the outline of the inner concave portion 8 is matched with the outline of the limiting protrusion 55. The outer layer of the cylindrical channel 54 is provided with N pole blades 51 and S pole blades 52 which are uniformly distributed, and the N pole blades 51 and the S pole blades 52 are distributed on the outer layer of the cylindrical channel 54 in a circumferential array; the N-pole blade 51 and the S-pole blade 52 both extend along the axial direction of the rotating shaft 53, and the rotating shaft 53 is coaxially arranged with the cylindrical passage 54. The end surfaces of the N-pole blades 51 and the S-pole blades 52 facing the first positioning seat 6 are all arranged in the same plane, and the end surfaces of the N-pole blades 51 and the S-pole blades 52 facing the second positioning seat 7 are all arranged in the same plane; the N pole blade 51 and the S pole blade 52 are both in a spiral twisted shape, and included angles exist between the N pole blade 51 and the S pole blade 52 and the water flow direction. The number of the N-pole blades 51 and the number of the S-pole blades 52 are the same and are alternately distributed on the outer layer of the cylindrical channel 54, and the sum of the number of the N-pole blades 51 and the number of the S-pole blades 52 is even.

The first positioning seat 6 comprises a first shaft sleeve 61, a first mounting column 62 and a plurality of first supporting sheets 63 uniformly distributed between the first shaft sleeve 61 and the first mounting column 62; each of the first supporting pieces 63 is distributed on the outer layer of the first mounting post 62 in a circumferential array, and each of the first supporting pieces 63 extends along the axial direction of the first mounting post 62. Each first supporting piece 63 is arranged in parallel with the water flow direction; the distance between the first mounting column 62 and the magnetic impeller 5 is smaller than the distance between the first shaft sleeve 61 and the magnetic impeller 5; the first shaft sleeve 61 is arranged in the shell 1, and a first step 9 for placing the first shaft sleeve 61 is arranged in the shell 1; a first groove 64 for mounting the rotating shaft 53 is formed in the first mounting column 62, the first groove 64 is cylindrical, and the inner diameter of the first groove 64 is the same as the outer diameter of the rotating shaft 53. The second positioning seat 7 comprises a second shaft sleeve 71, a second mounting column 72 and a plurality of second supporting pieces 73 uniformly distributed between the second shaft sleeve 71 and the second mounting column 72; each second supporting sheet 73 is distributed on the outer layer of the second mounting column 72 in a circumferential array, and each second supporting sheet 73 extends along the axial direction of the second mounting column 72; the second mounting column 72 is provided with a second groove 74 for mounting the rotating shaft 53, the second groove 74 is cylindrical, and the inner diameter of the second groove 74 is the same as the outer diameter of the rotating shaft 53; the second shaft sleeve 71 is arranged in the shell 1, and a second step 10 for placing the second shaft sleeve 71 is arranged in the shell 1; the second shaft sleeve 71 is further provided with a third step 11 for placing the upper cover 2, and the third step 11 is arranged back to the magnetic impeller 5. The shell 1 is also provided with a fourth step 12 for placing the upper cover 2, and the fourth step 12 is arranged close to the water inlet 4; a sealing ring 13 is arranged between the second shaft sleeve 71 and the upper cover 2, and the outer layer of the sealing ring 13 is tightly attached to the inner wall of the shell 1.

The specific working process of this embodiment is as follows, the water flow firstly enters into the housing 1 along the water inlet 4, and the water flow firstly passes through the second shaft sleeve 71 on the second positioning seat 7 and then flows into the chamber with the magnetic impeller 5 in the housing 1 along the gap between each of the second supporting pieces 73. Because the rotating shaft 53 is arranged in the cylindrical channel 54 of the magnetic impeller 5, one end of the rotating shaft 53 is installed on the first positioning seat 6, and the other end of the rotating shaft 53 is installed on the second positioning seat 7, when water flow impacts the spiral N-pole blade 51 and the spiral S-pole blade 52, the magnetic impeller 5 will rotate relative to the casing 1. Since the N-pole blades 51 and the S-pole blades 52 have different polarities and are alternately arranged, the hall element 14 stably receives an off or on signal when the magnetic impeller 5 rotates. The N-pole blade 51 forms a polarity by magnetization alone, and the S-pole blade 52 also forms a polarity by magnetization alone, so that the mutual interference between the N-pole blade 51 and the S-pole blade 52 is small; meanwhile, the N-pole blade 51 and the S-pole blade 52 extend along the direction of the rotating shaft 53, so that the hall element 14 can receive a signal in a wider range, and the hall element 14 can receive a signal stably. Since the magnetic impeller 5 rotates at the same frequency as the hall element 14 generates the off and on signals, the hall element 14 sends the generated pulse signal to the control circuit, thereby converting the flow rate of the water flowing through the housing.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A miniaturized flow sensor device comprises a shell (1) and an upper cover (2), wherein a water outlet (3) is formed in the shell (1), a water inlet (4) is formed in the upper cover (2), and the miniaturized flow sensor device is characterized in that a magnetic impeller (5) capable of rotating relative to the shell is arranged in the shell (1), the magnetic impeller (5) at least comprises an N-pole blade (51) and an S-pole blade (52), and each N-pole blade (51) and each S-pole blade (52) are arranged in pairs; a rotating shaft (53) which synchronously rotates with the magnetic impeller (5) is arranged in the magnetic impeller, and each N-pole blade (51) and each S-pole blade (52) are alternately distributed on the outer layer of the rotating shaft (53); a first positioning seat (6) and a second positioning seat (7) which are movably connected with the rotating shaft (53) are respectively arranged at two ends of the rotating shaft (53), and the first positioning seat (6) is installed in the shell (1) and is close to the water outlet (3); the second positioning seat (7) is installed at the other end of the shell (1) and is close to the water inlet (4), the upper cover (2) is abutted against the second positioning seat (7), and the first positioning seat (6) and the second positioning seat (7) are coaxially arranged; the magnetic impeller is characterized in that a Hall element (14) is arranged outside the shell (1), and the Hall element (14) is arranged towards the magnetic impeller (5).

2. The miniaturized flow sensor device according to claim 1, wherein the magnetic impeller (5) is provided with a cylindrical channel (54) at the center for mounting a rotating shaft (53), a limiting protrusion (55) is arranged in the cylindrical channel (54), an inner concave portion (8) for mounting the limiting protrusion (55) is arranged on the outer layer of the rotating shaft (53), and the outline of the inner concave portion (8) is matched with the outline of the limiting protrusion (55).

3. The miniaturized flow sensor device according to claim 2, wherein the outer layer of the cylindrical channel (54) is provided with N-pole blades (51) and S-pole blades (52) which are uniformly distributed, and the N-pole blades (51) and the S-pole blades (52) are distributed on the outer layer of the cylindrical channel (54) in a circumferential array; n utmost point blade (51) and S utmost point blade (52) all extend along the axial of pivot (53), pivot (53) and cylindric passageway (54) coaxial axle center setting.

4. The miniaturized flow sensor device according to claim 3, wherein the end faces of the N-pole blades (51) and the S-pole blades (52) facing the first positioning seat (6) are all arranged in the same plane, and the end faces of the N-pole blades (51) and the S-pole blades (52) facing the second positioning seat (7) are all arranged in the same plane; the N pole blade (51) and the S pole blade (52) are both in a spiral twisted shape, and included angles exist between the N pole blade (51) and the S pole blade (52) and the water flow direction.

5. The miniaturized flow sensor device according to claim 2, wherein the N-pole blades (51) and the S-pole blades (52) are equal in number and are alternately distributed on the outer layer of the cylindrical channel (54), and the sum of the numbers of the N-pole blades (51) and the S-pole blades (52) is an even number.

6. The miniaturized flow sensor device of claim 1, wherein the first positioning seat (6) comprises a first shaft sleeve (61), a first mounting column (62), and a plurality of first supporting sheets (63) uniformly distributed between the first shaft sleeve (61) and the first mounting column (62); each first supporting sheet (63) is distributed on the outer layer of the first mounting column (62) in a circumferential array, and each first supporting sheet (63) extends along the axial direction of the first mounting column (62).

7. The miniaturized flow sensor device of claim 6, wherein each of the first support pieces (63) is disposed parallel to a flow direction of water; the distance between the first mounting column (62) and the magnetic impeller (5) is smaller than the distance between the first shaft sleeve (61) and the magnetic impeller (5); the first shaft sleeve (61) is arranged in the shell (1), and a first step (9) for placing the first shaft sleeve (61) is arranged in the shell (1); a first groove (64) used for installing the rotating shaft (53) is formed in the first installation column (62), the first groove (64) is cylindrical, and the inner diameter of the first groove (64) is the same as the outer diameter of the rotating shaft (53).

8. The miniaturized flow sensor device according to claim 1, wherein the second positioning socket (7) comprises a second bushing (71), a second mounting post (72), and a plurality of second supporting pieces (73) uniformly distributed between the second bushing (71) and the second mounting post (72); each second supporting sheet (73) is distributed on the outer layer of the second mounting column (72) in a circumferential array, and each second supporting sheet (73) extends along the axial direction of the second mounting column (72); a second groove (74) for mounting the rotating shaft (53) is formed in the second mounting column (72), the second groove (74) is cylindrical, and the inner diameter of the second groove (74) is the same as the outer diameter of the rotating shaft (53); the second shaft sleeve (71) is arranged in the shell (1), and a second step (10) for placing the second shaft sleeve (71) is arranged in the shell (1); and a third step (11) for placing the upper cover (2) is further arranged on the second shaft sleeve (71), and the third step (11) is arranged back to the magnetic impeller (5).

9. The miniaturized flow sensor device according to claim 8, wherein a fourth step (12) for placing the upper cover (2) is further provided on the housing (1), and the fourth step (12) is provided near the water inlet (4); a sealing ring (13) is arranged between the second shaft sleeve (71) and the upper cover (2), and the outer layer of the sealing ring (13) is tightly attached to the inner wall of the shell (1).