CN216433088U

CN216433088U - Flow velocity pressure sensor

Info

Publication number: CN216433088U
Application number: CN202123110092.3U
Authority: CN
Inventors: 黄锋
Original assignee: Yueqing Singfong Electronics Factory
Current assignee: Yueqing Singfong Electronics Factory
Priority date: 2021-12-11
Filing date: 2021-12-11
Publication date: 2022-05-03
Anticipated expiration: 2031-12-11

Abstract

The application relates to a flow velocity pressure sensor, which comprises a mounting base, a rotor assembly, a pressure core body and a Hall element; a flow velocity detection channel is arranged on the mounting base, and the rotor assembly is arranged in the flow velocity detection channel; the rotor assembly comprises a magnetic rotor and a flow deflector arranged at the liquid inlet; the flow deflector extends spirally along the length direction of the flow velocity detection channel; the liquid entering the flow velocity detection channel flows along a spiral track by utilizing the flow deflector, so that the rotor is driven to rotate towards the spiral direction, a pulse signal formed by the rotation of the magnetic rotor is obtained by utilizing the Hall element, and the pulse signal is used for analyzing to obtain the flow velocity of the liquid in the pipeline; and the liquid flows along the spiral track, so that the turbulence generated by interaction between the liquids is reduced, the flow of the liquid is more orderly, the fluctuation range of the pulse signal is reduced, and the detection precision is improved.

Description

Flow velocity pressure sensor

Technical Field

The application relates to the technical field of sensors, in particular to a flow velocity pressure sensor.

Background

In the related art, the pressure and flow rate detection for the liquid are two separate products. The water pressure sensor is used in a water flow monitoring system and is used for detecting the water pressure in a water inlet, a water outlet and a pipeline of the irrigation valve; the water flow sensor is used in a water flow monitoring system to detect the water inlet amount and the water outlet amount of the irrigation valve.

The existing composite flow pressure sensor on the market comprises a front end cover, a pressure core body, a rotor, a Hall element, a magnetic material and a processor, wherein a containing cavity for placing the rotor is formed in the front end cover, a rotating shaft of the rotor is perpendicular to the flow direction of liquid and is fixed with two side walls of the containing cavity, the part of the rotor on one side of the rotating shaft is exposed out of an opening of the containing cavity to form a shape similar to a waterwheel, the flowing liquid is utilized to push the rotor to be exposed out of one side of the containing cavity so as to drive the rotor to rotate, and the magnetic material is arranged on the rotor and rotates together with the rotor; the Hall element is arranged on the front end cover and used for acquiring a pulse signal according to the rotating magnetic material; the cavity in the front end cover is connected with the pressure core body through a liquid channel, and the processor is connected with the Hall element and the pressure core body and used for receiving pulse signals of the Hall element and pressure signals of the pressure core body and outputting liquid pressure values or/and liquid flow values according to the pulse signals and the pressure signals. The sensor integrates the traditional water pressure sensor and the traditional water flow sensor into a whole, and has all functions of the water pressure sensor and the water flow sensor.

The larger the water retaining area of the rotor exposed from the accommodating cavity is, the larger the obstruction to the liquid flow in the pipeline is, and the smaller the water retaining area of the rotor is, the rotor is easily influenced by the turbulent flow caused by the liquid flow in the pipeline, so that the rotation of the rotor is not stable enough, and the detection precision is reduced; and the pivot is perpendicular to the liquid flow direction, and when the rotor rotated under the promotion of liquid, some liquid can get into and hold the cavity under the drive of rotor, discharges from holding the cavity in the opposite direction again, can form local turbulent flow equally, influences the rotation of rotor, leads to detecting the precision not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the detection precision is not high, the application provides a velocity of flow pressure sensor.

The application provides a velocity of flow pressure sensor adopts following technical scheme:

a flow velocity pressure sensor comprises a mounting base, a rotor assembly, a pressure core body and a Hall element; the mounting base is provided with a flow velocity detection channel, the flow velocity detection channel is a circular channel with two through ends, and one end of the flow velocity detection channel is a liquid inlet; the rotor assembly is arranged in the flow velocity detection channel, and the Hall element is arranged on the mounting base at a position close to one side of the flow velocity detection channel; the rotor assembly comprises a magnetic rotor and a flow deflector arranged at the liquid inlet of the flow speed detection channel; the flow deflector extends spirally along the length direction of the flow velocity detection channel; the rotor is rotatably connected in the flow velocity detection channel, and the rotating axis of the rotor is superposed with the axis of the flow velocity detection channel.

By adopting the technical scheme, when the sensor is installed in a pipeline, liquid flows along the pipeline and enters from one end of the flow velocity detection channel, the flow direction of the liquid entering the pipeline is changed by utilizing the spiral flow deflector, so that the liquid flows along a spiral track along the inner wall of the circular flow velocity detection channel, the rotor is driven to rotate towards the spiral direction, then a pulse signal formed by the rotation of the magnetic rotor is obtained by utilizing the Hall element, and the pulse signal is used for analyzing to obtain the flow velocity of the liquid in the pipeline; liquid enters from one end of the flow velocity detection channel, drives the rotor to rotate and then is discharged from the other end, so that the flow velocity of the liquid can be detected according to the amount of the liquid entering, and the detection precision is improved; and the liquid flows along the spiral track, so that the turbulence generated by interaction between the liquids is reduced, the flow of the liquid is more orderly, the fluctuation range of the pulse signal is reduced, and the detection precision is further improved.

Optionally, the number of the guide vanes is at least two, and all the guide vanes are uniformly arranged in an array along the circumferential direction.

Through adopting above-mentioned technical scheme, utilize a plurality of deflectors to carry out the water conservancy diversion to the liquid that gets into velocity of flow detection passageway, make liquid form stranded fluid along the heliciform orbit of difference, promote the rotor rotation from even not equidirectional simultaneously, make the rotation of rotor more stable, improve and detect the precision.

Optionally, the rotor includes a rotating shaft and an induction member fixed on the rotating shaft, and the induction member is made of a magnetic material.

Through adopting above-mentioned technical scheme, directly adopting magnetic material to make the response piece, utilizing the flow of liquid to drive the response piece and rotate and acquire pulse signal, saved the installation of magnet and rotor, be convenient for installation and maintenance.

Optionally, the sensing piece comprises at least two sensing pieces uniformly arranged along the circumferential direction of the rotating shaft; the induction sheet is flaky along the length direction of the rotating shaft and extends outwards along the radial direction of the rotating shaft.

By adopting the technical scheme, a channel convenient for liquid circulation is formed between the adjacent induction sheets, so that the obstruction of the induction piece to the liquid flow is reduced; and the induction sheet is sheet-shaped, so that the induction sheet is more convenient to rotate, the pulse signal generated when water flow is slow is more accurate, and the pulse signal interval received by the Hall element is clearer compared with that of the block-shaped magnet.

Optionally, the inlet of the flow velocity detection channel is provided with an inward-inclined steady flow chamfer.

Through adopting above-mentioned technical scheme, utilize the stationary flow chamfer to carry out the direction to the liquid of velocity of flow detection passageway inlet department, make liquid can paste the stationary flow chamfer and flow in towards the inlet to reduce the indiscriminate flow phenomenon of velocity of flow detection passageway inlet department.

Optionally, the mounting base includes a fixing portion fixed on the pipeline, and an extending portion disposed on the fixing portion and extending toward the pipeline axis, the flow velocity detection channel is disposed at an end of the extending portion, and the axis of the flow velocity detection channel coincides with the axis of the pipeline.

By adopting the technical scheme, because the liquid does not completely flow linearly along the direction of the pipeline when flowing in the pipeline, but flows randomly along a track similar to a spiral shape under the action of the pipe wall, the more unstable the liquid flow close to the pipe wall is, the more easily the turbulent flow phenomenon is generated; the extension part is utilized to enable the flow velocity detection channel to be located at the axis line of the pipeline, so that stable liquid at the center of the pipeline is detected, and the detection precision is improved.

Optionally, an installation cavity extending from the fixing portion to the extending portion is arranged in the installation base; the mounting base is provided with a pressure detection channel for communicating the mounting cavity with the pipeline, and the pressure core body is arranged in the position, corresponding to the pressure detection channel, in the mounting cavity; the Hall element is arranged at one end, close to the flow speed detection channel, of the installation cavity in the extension part.

By adopting the technical scheme, the pressure core body and the Hall element are installed in the installation cavity for protection, and the pressure core body and the Hall element are prevented from being impacted and eroded by water flow in the pipeline; when liquid passes through the pressure detection passageway and contacts with the pressure core, can utilize the pressure core output pressure signal, pressure signal is used for the analysis to obtain the pressure value size of rivers in the pipeline.

Optionally, the pressure detection channel is disposed on the other side of the mounting base opposite to the liquid inlet of the flow velocity detection channel.

Through adopting above-mentioned technical scheme, set up pressure measurement passageway on the mounting base with in the pipeline feed liquor opposite direction's one side, avoid the interior liquid that flows of pipeline to directly get into from openly, can prevent that the particle impurity in the pipeline from getting into pressure measurement passageway under the drive of liquid and causing the jam, influence detection effect.

Optionally, a flow passage with two through ends is arranged on the extension part along the length direction of the pipeline.

By adopting the technical scheme, the water retaining area of the extension part in the liquid flowing direction is reduced by utilizing the overflowing channel, so that the obstruction of the extension part to the liquid flowing is reduced.

Optionally, a circle of fixing edges are arranged on the fixing portion, and at least three fixing holes are uniformly formed in the fixing edges along the circumferential direction.

By adopting the technical scheme, the bolt penetrates through the fixing hole and the mounting hole on the pipeline and is screwed tightly, so that the fixing part and the pipeline are fixed together and are sealed by using the rubber pad; compare in set up the external screw thread on the fixed part lateral wall and directly with pipeline threaded connection's mode, utilize bolted connection can accurate control the orientation of extension, make the axial lead of velocity of flow measuring passageway accurately coincide with the axial lead of pipeline, the liquid of being convenient for gets into and detects in the velocity of flow measuring passageway.

To sum up, the beneficial effects of the utility model are that:

1. when the sensor is installed in a pipeline, liquid flows along the pipeline and enters from one end of a flow velocity detection channel, the flow direction of the liquid entering is changed by utilizing a spiral flow deflector to drive a rotor to rotate towards a spiral direction, a pulse signal formed by the rotation of the magnetic rotor is obtained by utilizing a Hall element, and the pulse signal is used for analyzing to obtain the flow velocity of the liquid in the pipeline; liquid enters from one end of the flow velocity detection channel, drives the rotor to rotate and then is discharged from the other end, so that the flow velocity of the liquid can be detected according to the amount of the liquid entering, and the detection precision is improved; the liquid flows along the spiral track, so that the turbulence generated by interaction between the liquids is reduced, the flow of the liquid is more orderly, the fluctuation amplitude of the pulse signal is reduced, and the detection precision is further improved;

2. when the liquid is contacted with the pressure core body through the pressure detection channel, a pressure signal can be output by using the pressure core body and is used for analyzing and obtaining the pressure value in the pipeline; and set up pressure measurement passageway in liquid outlet one side, avoid the interior liquid that flows of pipeline to directly get into from openly, can prevent that the granule impurity in the pipeline from getting into pressure measurement passageway under the drive of liquid and causing the jam, influence detection effect.

Drawings

FIG. 1 is a schematic view of the present application of the installation structure of a flow rate pressure sensor and a pipe;

FIG. 2 is a cross-sectional structural schematic of the overall structure of the present application;

FIG. 3 is an exploded view of the rotor assembly of the present application;

fig. 4 is a schematic structural diagram of the side of the present application facing the liquid outlet of the tube.

Reference numerals: 1. mounting a base; 11. a fixed part; 111. fixing the edge; 112. a fixing hole; 113. a pressure detection channel; 12. an extension portion; 121. a flow velocity detection channel; 1211. a liquid inlet; 1212. a liquid outlet; 1213. a limiting step; 1214. chamfering the steady flow; 122. an overflow channel; 13. a mounting cavity; 14. sealing the cover; 2. a rotor assembly; 21. an outer housing; 211. a flow deflector; 212. connecting ribs; 22. a rotating shaft; 23. a sensing member; 231. an induction sheet; 3. a Hall element; 4. a pressure core; a. a pipeline; a1, a fixed seat; a11, mounting port.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses velocity of flow pressure sensor, refer to fig. 1, fig. 2, including install mounting base 1 on pipeline a inner wall, set up rotor subassembly 2, hall element 3 and pressure core 4 on mounting base 1. Utilize the water pressure in the pressure core 4 detection pipeline a, utilize rivers that flow in the pipeline a to drive rotor subassembly 2 and rotate to detect the velocity of flow with the cooperation of hall element 3, thereby realize the effect of detecting water pressure and velocity of flow simultaneously.

Referring to fig. 1, a fixing seat a1 is provided on an outer wall of a side of a pipeline a, a mounting opening a11 penetrating into the pipeline a is opened on the fixing seat a1, and the mounting base 1 includes a fixing portion 11 capable of being fixed at the mounting opening a11, and an extending portion 12 integrally formed on the fixing portion 11 and extending toward an axial line direction of the pipeline a. A circle of fixed edge 111 is integrally formed on the outer side of the fixed part 11, and four fixed holes 112 are uniformly formed in the fixed edge 111 along the circumferential direction; when the fixing part 11 is installed, the extension part 12 is inserted into the pipeline a from the installation opening a11, the fixing edge 111 is abutted against the fixing seat a1 on the outer side of the pipeline a, then a bolt is inserted through the fixing hole 112 and screwed into the installation hole on the pipeline a, so that the fixing part 11 and the pipeline a are fixed together, and sealing is realized by a rubber gasket between the fixing edge 111 and the fixing seat a 1.

Referring to fig. 1 and 2, a flow velocity detection channel 121 coaxial with the pipe a is formed at an end of the extension portion 12 along a length direction of the pipe a, and the rotor assembly 2 is installed in the flow velocity detection channel 121; the flow velocity detection channel 121 is a circular channel with two ends, one end facing the water flow entering direction is a liquid inlet 1211, and the other end is a liquid outlet 1212. A circle of limiting steps 1213 are arranged in the flow velocity detection channel 121 towards the liquid inlet 1211, the rotor assembly 2 comprises an outer shell 21 formed by splicing two straight cylindrical half shells, a rotating shaft 22 rotatably connected in the outer shell 21, and an induction element 23 fixedly connected to the rotating shaft 22 and made of a magnetic material, the outer shell 21 enters the flow velocity detection channel 121 from one end of the liquid inlet 1211, and the end of the outer shell abuts against the limiting steps 1213 to realize positioning and limiting; and the radius of the outer shell 21 is slightly larger than the flow velocity detection channel 121, so that the outer wall of the outer shell can be in interference fit with the inner wall of the flow velocity detection channel 121 to realize fixation.

Referring to fig. 2 and 3, two ends of the outer casing 21 are provided with openings for water to flow through, and four flow deflectors 211 are integrally formed at one end opening of the outer casing facing the liquid inlet 1211, wherein the four flow deflectors 211 are circumferentially and uniformly arranged in an array and extend spirally in the same direction along the length direction of the flow rate detection channel 121. A cross-shaped connecting rib 212 is integrally formed at an opening of one end of the outer shell 21 facing the liquid outlet 1212, and two ends of the rotating shaft 22 are rotatably connected to the center intersection of the four baffles 211 and the center of the connecting rib 212, so that the rotating shaft 22 can rotate along the axial lead of the outer shell 21; the sensing element 23 includes four sensing pieces 231 uniformly arranged along the circumferential direction of the rotating shaft 22, and the four sensing pieces 231 all extend in a sheet shape along the length direction of the rotating shaft 22 and the radial direction of the rotating shaft 22. When the liquid flows along the pipe a, the liquid enters the outer casing 21 through the liquid inlet 1211 of the flow velocity detection channel 121, and the plurality of flow deflectors 211 extending in a spiral shape guide the liquid, so that the liquid forms a plurality of streams of liquid along different spiral tracks, and the sensing element 23 is pushed to rotate from different directions.

Referring to FIG. 2, a steady flow chamfer 1214 inclined inward is formed on the inlet 1211 of the flow rate detection channel 121, and the steady flow chamfer 1214 guides the liquid in the inlet 1211 of the flow rate detection channel 121, so that the liquid can flow into the inlet 1211 along with the steady flow chamfer 1214, thereby reducing the turbulent flow at the inlet 1211.

Referring to fig. 1 and 2, a mounting cavity 13 extending from the fixing portion 11 into the extension portion 12 is formed in the mounting base 1, the mounting cavity 13 penetrates the fixing portion 11 in the direction of the mounting opening a11, and both the pressure core 4 and the hall element 3 are mounted in the mounting cavity 13. The hall element 3 is located in the installation cavity 13 at the end of the extension part 12 close to the flow velocity detection channel 121, and when the sensing piece 23 rotates under the action of water flow, the hall element 3 can respectively sense the magnetic field when the four sensing pieces 231 rotate and pass through, and generate pulse signals, and the pulse signals are used for analyzing to obtain the flow velocity of the liquid in the pipeline a; and the liquid flows along the spiral track, so that the turbulence generated by interaction between the liquids is reduced, the flow of the liquid is more orderly, the fluctuation range of the pulse signal is reduced, and the detection precision is further improved.

Referring to fig. 1 and 4, the extension portion 12 is provided with flow-passing channels 122 with two through ends on two sides of the installation cavity 13 along the flowing direction of the liquid in the pipeline a, and the flow-passing channels 122 reduce the water-retaining area of the extension portion 12 in the flowing direction of the liquid, thereby reducing the obstruction of the extension portion 12 to the flowing of the liquid.

Referring to fig. 1 and 2, a pressure detection channel 113 communicating the installation cavity 13 and the pipeline a is formed on one side of the liquid outlet 1212 of the fixing portion 11, and the pressure core 4 is installed at an outlet of the installation cavity 13 corresponding to the pressure detection channel 113; when the liquid is in contact with the pressure core 4 through the pressure detection channel 113, the pressure core 4 can be used for outputting a pressure signal, and the pressure signal is used for analyzing and obtaining the pressure value of the water flow in the pipeline a; and set up pressure measurement passageway 113 in installation base 1 with the opposite side of feed liquor direction in the pipeline a, can avoid the interior liquid that flows of pipeline a to directly get into from openly, prevent that the particle impurity in the pipeline a from getting into pressure measurement passageway 113 under the drive of liquid and causing the jam, influence detection effect.

Referring to fig. 1 and 2, after the pressure core 4 and the hall element 3 are installed, pins of the pressure core 4 and the hall element 3 are connected out through a lead, then the installation cavity 13 is filled and sealed through pouring sealant, leakage is prevented, and meanwhile the pressure core 4 and the hall element 3 are protected, so that the pressure core 4 and the hall element 3 are prevented from being corroded by water flow; and one side of the installation cavity 13 facing the installation opening a11 is detachably fixed with a sealing cover 14, a lead is led out from a small hole on the sealing cover 14 and is connected into the detection circuit, and the sealing cover 14 protects the installation cavity 13 and is convenient for an operator to overhaul.

The specific working principle of the flow velocity pressure sensor in the embodiment is as follows:

when the liquid flows along the pipe a, the liquid enters the outer shell 21 through the liquid inlet 1211 of the flow velocity detection channel 121, and the liquid is guided by the plurality of spirally extending guide vanes 211, so that the liquid forms a plurality of strands of fluid along different spiral tracks, and the sensing element 23 is pushed to rotate from different uniform directions; the hall elements 3 can respectively sense the magnetic field passing by the four sensing pieces 231 and generate pulse signals, and the pulse signals are used for analyzing and obtaining the flow rate of the liquid in the pipeline a.

When the liquid contacts the pressure core 4 through the pressure detecting channel 113, the pressure core 4 outputs a pressure signal, and the staff analyzes the pressure value of the water flow in the pipeline a.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A flow velocity pressure sensor comprises a mounting base (1), a rotor assembly (2), a pressure core body (4) and a Hall element (3); the method is characterized in that: a flow velocity detection channel (121) is arranged on the mounting base (1), the flow velocity detection channel (121) is a circular channel with two through ends, and one end of the flow velocity detection channel is a liquid inlet (1211); the rotor assembly (2) is arranged in the flow speed detection channel (121), and the Hall element (3) is arranged on the mounting base (1) at a position close to one side of the flow speed detection channel (121); the rotor assembly (2) comprises a magnetic rotor and a flow deflector (211) arranged at a liquid inlet (1211) of the flow velocity detection channel (121); the flow deflector (211) extends spirally along the length direction of the flow speed detection channel (121); the rotor is rotatably connected in the flow speed detection channel (121), and the rotating axis of the rotor is superposed with the axis of the flow speed detection channel (121).

2. The flow rate pressure sensor according to claim 1, wherein: the number of the guide vanes (211) is at least two, and all the guide vanes (211) are uniformly arrayed along the circumferential direction.

3. The flow rate pressure sensor according to claim 1, wherein: the rotor comprises a rotating shaft (22) and an induction piece (23) fixed on the rotating shaft (22), and the induction piece (23) is made of a magnetic material.

4. The flow rate pressure sensor according to claim 3, wherein: the sensing piece (23) comprises at least two sensing pieces (231) which are uniformly arranged along the circumferential direction of the rotating shaft (22); the sensing piece (231) is sheet-shaped along the length direction of the rotating shaft (22) and extends outwards along the radial direction of the rotating shaft (22).

5. The flow rate pressure sensor according to claim 1, wherein: and a steady flow chamfer (1214) which inclines inwards is arranged at the liquid inlet (1211) of the flow speed detection channel (121).

6. The flow rate pressure sensor according to claim 1, wherein: the mounting base (1) comprises a fixing part (11) fixed on the pipeline (a) and an extending part (12) arranged on the fixing part (11) and extending towards the axial lead direction of the pipeline (a); the flow velocity detection channel (121) is arranged at the end part of the extension part (12), and the axial lead of the flow velocity detection channel (121) is superposed with the axial lead of the pipeline (a).

7. The flow rate pressure sensor according to claim 6, wherein: an installation cavity (13) extending from the fixing part (11) to the extension part (12) is arranged in the installation base (1); the mounting base (1) is provided with a pressure detection channel (113) for communicating the mounting cavity (13) with the pipeline (a), and the pressure core body (4) is arranged in the mounting cavity (13) at a position corresponding to the pressure detection channel (113); the Hall element (3) is arranged at one end, close to the flow speed detection channel (121), of the installation cavity (13) in the extension part (12).

8. The flow rate pressure sensor according to claim 7, wherein: the pressure detection channel (113) is arranged on the other side, opposite to the liquid inlet (1211) of the flow speed detection channel (121), of the mounting base (1).

9. The flow rate pressure sensor according to claim 6, wherein: and a flow passage (122) with two through ends is arranged on the extension part (12) along the length direction of the pipeline (a).

10. The flow rate pressure sensor according to claim 6, wherein: the fixing part (11) is provided with a circle of fixing edges (111), and at least three fixing holes (112) are uniformly formed in the fixing edges (111) along the circumferential direction.