CN220268607U - Water flow detection structure and valve body thereof - Google Patents

Abstract

The utility model provides a water flow detection structure and a valve body thereof, wherein the water flow detection structure is arranged in a pipeline or the valve body, an inner rotating piece in the water flow detection structure is arranged in an inclined way along the circumferential direction until the projection in the water flow direction is closed, and when the water flow is small, as no gap exists in the water flow detection mechanism in the water flow direction, the inner rotating piece can be impacted by small water flow stably and rotate by taking a central shaft as an axis, so that a magnetic rotor is driven to rotate to generate a magnetic field, and finally the detection of the water flow is realized through a Hall element induction magnetic field at the outer side of the pipeline or the valve body.

Description

Water flow detection structure and valve body thereof

Technical Field

The utility model relates to the field of water flow detection, in particular to a water flow detection structure and a valve body thereof.

Background

In scenes such as agricultural irrigation, need pass through pipeline drainage to each water area with irrigation water, set up corresponding control valve at each water node simultaneously, in long-term use, the control valve can appear that the structure is not hard up, sealing washer ageing scheduling problem, leads to rivers to pass through the control valve and leak to the rear end, causes the water waste. For the water leakage problem, common detection methods include pressure detection, water flow detection and the like, and the water leakage position can be positioned through water leakage detection so as to be convenient for maintenance.

In the water flow detection method, a Hall element is often used for carrying out water flow detection together with a magnetic rotor, and the principle is as follows: when the water flows through the water-flow type magnetic flow meter, the impeller is impacted, the impeller rotates to drive the magnetic rotor to rotate, the rotating speed of the magnetic rotor changes linearly along with the water flow, the Hall element outputs corresponding pulse signals to be fed back to the controller, and the controller judges the water flow.

In the prior art, a rotor with a spiral impeller is generally used, for example, a water flow sensor with a patent publication No. CN202793477U is disclosed, the utility model comprises a shell, a Hall element, a water flow diversion sleeve, a magnetic rotor and a rotor support, wherein the water flow diversion sleeve is arranged in the shell, one end of the magnetic rotor is inserted into the water flow diversion sleeve, the other end of the magnetic rotor is inserted into the rotor support, the rotor impeller is arranged on the circumference of the magnetic rotor, the spiral angle of the rotor impeller is an included angle alpha, a water flow diversion blade is arranged at the water inlet of the water flow diversion sleeve, the spiral angle of the water flow diversion blade is an included angle beta, and the main technical characteristics are that the included angle alpha of the spiral angle alpha of the rotor impeller is left-handed or right-handed, and the included angle beta of the spiral angle beta of the water flow diversion blade is right-handed or left-handed. The magnetic rotor speed sensor has the characteristics that under the condition of the same water flow, the rotating speed of the magnetic rotor can be effectively improved, the flow is in direct proportion to the rotating speed of the magnetic rotor, and the accuracy of the water flow sensor is improved. But in this novel, can only improve the rotational speed of magnetic rotor based on can promote impeller pivoted condition, owing to have the space between the rotor impeller, under the less circumstances of rivers, rivers probably directly flow through the clearance, and the impeller does not receive the striking of rivers, and magnetic rotor does not rotate, leads to magnetic force not to change, thereby probably produces the unable condition of inducing and unable discernment rivers of hall element.

Disclosure of Invention

Therefore, it is necessary to provide a water flow detection mechanism and a valve body thereof, which solve the problems that the magnetic force is not changed, and the hall element cannot sense and cannot identify the water flow because the magnetic force is not changed due to the fact that the magnetic rotor is not rotated because the impeller is not impacted by the water flow because the rotor impeller has gaps and the water flow can directly flow through the gaps under the condition that the water flow is small.

In order to achieve the above purpose, the utility model provides a water flow detection structure, which is arranged in a pipeline or a valve body and is positioned at the induction position of a Hall element, when water flows through the water flow detection structure, a magnetic rotor positioned at the outermost edge inside the water flow detection structure is driven to rotate, and the Hall element induces magnetic field change to realize water flow detection, and the water flow detection structure comprises a central shaft piece and an inner rotation piece;

the two ends of the central shaft piece are rotatably arranged in the pipeline or the valve body;

the plurality of inner rotating sheets are arranged on the outer wall of the central shaft piece in a circumferential inclined manner, and the projections of the plurality of inner rotating sheets in the water flow direction are closed;

the force generated when the water flow hits each inner rotating piece can drive the central shaft piece to rotate in the same direction, namely the magnetic rotor rotates in the same direction.

Further, the magnetic rotor is characterized by further comprising an outer rotating piece and a sleeve piece, wherein the inner wall of the sleeve piece is connected with the inner rotating piece, the outer rotating piece is arranged on the outer wall of the sleeve piece in a plurality of inclined circumferential directions, the projections of the outer rotating piece in the water flow direction are closed, and the outer rotating piece is impacted by water flow to drive the magnetic rotor to rotate in the same direction as the inner rotating piece is impacted by water flow to drive the magnetic rotor to rotate.

Further, the surface of the inner rotary piece and/or the outer rotary piece, which is in contact with the water flow, is a curved surface.

Further, the width of the inner rotary piece is greater than the width of the outer rotary piece.

Further, the magnetic rotor is disposed on the outer rotary piece.

Further, the device also comprises an outer shell, wherein a connecting part is arranged in the outer shell and is rotatably connected with two ends of the central shaft piece.

Further, the outer shell comprises a front outer shell and a rear outer shell, and the front outer shell and the rear outer shell are detachably connected.

The present utility model also provides a valve body comprising:

the valve is used for controlling the on-off state of the valve body;

the control module is electrically connected with a Hall element, and the Hall element is arranged close to the valve body;

the water flow detection structure according to any one of the above summary is disposed in the valve body and located at an induction position of the hall element, and when water flows through the water flow detection structure, the magnetic rotor in the water flow detection structure is driven to rotate, and the hall element induces a magnetic field to change and realizes water flow detection through calculation of the control module.

Further, the plane of the sensing surface of the Hall element passes through the rotating surface of the magnetic rotor and is arranged in a cross way.

Further, the valve is an electromagnetic valve, and the electromagnetic valve is electrically connected with the control module.

Compared with the prior art, the technical scheme is characterized in that the water flow detection structure is arranged in the pipeline or the valve body, the inner rotating sheets in the water flow detection structure are arranged in a circumferential inclined mode to be sealed in the projection in the water flow direction, when the water flow is small, as gaps do not exist in the water flow detection mechanism in the water flow direction, the inner rotating sheets can be impacted by small water flow stably and rotate by taking the central shaft as the shaft, the magnetic rotor is driven to rotate to generate a magnetic field, and finally the water flow is detected through the Hall element induction magnetic field outside the pipeline or the valve body.

Drawings

Fig. 1 is a perspective view of a water flow detection structure according to an embodiment;

FIG. 2 is a perspective view of a water flow detection structure according to another embodiment;

FIG. 3 is a cross-sectional view of a water flow detection structure according to another embodiment;

FIG. 4 is a left side view of a water flow detection structure according to another embodiment;

FIG. 5 is a right side view of a water flow detection structure according to another embodiment;

fig. 6 is a cross-sectional view of a valve body according to an embodiment.

Reference numerals illustrate:

1. a water flow detection structure;

10. a central shaft member;

20. an inner rotating sheet;

11. a metal shaft;

30. an outer rotary plate;

40. a sleeve member;

60. a magnetic rotor;

50. an outer housing;

501. a front outer case;

502. a rear outer case;

504. a connection part;

80. a valve body;

801. a valve;

802. a control module;

803. a Hall element.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in the embodiments may be combined in any manner to form a corresponding implementable technical solution.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains; the use of related terms herein is for the description of specific embodiments only and is not intended to limit the present application.

In the description of the present application, the term "and/or" is a representation for describing logical relationships between objects, which means that three relationships may exist, e.g., a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the context associated object is a logical relationship of a type "or".

In this application, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.

Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this application is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.

As in the understanding of the "examination guideline," the expressions "greater than", "less than", "exceeding", and the like are understood to exclude the present number in this application; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of groups", "a plurality of" and the like, unless specifically defined otherwise.

In the description of the embodiments of the present application, spatially relative terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc., are used herein as terms of orientation or positional relationship based on the specific embodiments or figures, and are merely for convenience of description of the specific embodiments of the present application or ease of understanding of the reader, and do not indicate or imply that the devices or components referred to must have a particular position, a particular orientation, or be configured or operated in a particular orientation, and therefore are not to be construed as limiting of the embodiments of the present application.

Unless specifically stated or limited otherwise, in the description of the embodiments of the present application, the terms "mounted," "connected," "affixed," "disposed," and the like are to be construed broadly. For example, the "connection" may be a fixed connection, a detachable connection, or an integral arrangement; the device can be mechanically connected, electrically connected and communicated; it can be directly connected or indirectly connected through an intermediate medium; which may be a communication between two elements or an interaction between two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application pertains according to the specific circumstances.

Referring to fig. 1 to 6, the present embodiment provides a water flow detection structure 1, which is disposed in a pipeline or a valve body 80 and is located at an induction position of a hall element 803, when water flows through the water flow detection structure, the water flow passes through the water flow detection structure to drive a magnetic rotor 60 located at an outermost edge inside the water flow detection structure to rotate, the hall element 803 induces a magnetic field to change so as to realize water flow detection, and the water flow detection structure includes a central shaft 10 and an inner rotation piece 20; the two ends of the central shaft member 10 may be rotatably disposed in the pipe or the valve body 80, specifically, a connection structure for inserting the two ends of the central shaft member 10 may be disposed at the position where the water flow detection structure is located, and the connection structure may extend from the pipe wall to the center and form a space in the center for accommodating the two ends of the central shaft member 10. The central shaft member 10 may be made of plastic or metal, and is preferably made of plastic with light weight and high strength, such as pom plastic, in view of cost and small impact force of small water flow. On the other hand, in order to prevent the abrasion of the central shaft member 10 due to the long-term rotation, it is preferable that the metal shaft 11 is inserted and fixed at the axial center position of the central shaft member 10, the metal shaft 11 is rotatably connected to the connection structure, and the service life of the central shaft member 10 is improved by the mechanical strength of the metal.

The inner rotating blades 20 are arranged on the outer wall of the central shaft 10 in a circumferential inclined manner, the projections of the inner rotating blades 20 in the water flow direction are closed, the inner rotating blades 20 are taken as spiral blades as an example, each spiral blade is regularly arranged in the circumferential direction, the front end of each spiral blade extends to the rear end of the previous spiral blade in the rotating direction, under the structure, the water flow detection structure rotates to any position to stop, and when water flows to the water flow detection structure at any position, the water flow detection structure is contacted with one inner rotating blade 20, so that acting force is generated on the inner rotating blades 20, and the water flow detection structure rotates. In addition, the force generated when the water flow hits each inner rotating piece 20 can drive the central shaft member 10 to rotate in the same direction, specifically, the hitting direction of the water flow and the same side of the included angle of the hitting surface of each inner rotating piece 20 are acute angles or obtuse angles, that is, the direction of the force generated when the water flow hits each inner rotating piece 20 is directed in the clockwise direction or the anticlockwise direction, that is, the inner rotating piece 20 can drive the magnetic rotor 60 to rotate in the same direction. Alternatively, the number of the inner rotation pieces 20 is two.

It should be noted that, in order to be able to detect small water flows, the size of the inner rotary plate 20 should be adapted to the inner diameter of the pipe or the valve body 80, that is, the outermost edge of the inner rotary plate 20 should be close to the inner wall of the pipe or the valve body 80, and, in order to secure structural strength of the inner rotary plate 20, the diameter of the central shaft 10 should be proportional to the size of the inner rotary plate 20. It should be further noted that the magnetic rotor 60 may be disposed at the outermost edge of the inner rotary plate 20 to ensure that a larger linear velocity is obtained at a certain angular velocity and a stronger magnetic field change is obtained, so that the hall element 803 can sense the rotation of the magnetic rotor 60 pushed by a small water flow.

The utility model discloses a with rivers detection structure setting in pipeline or valve body 80, interior rotation piece 20 in the rivers detection structure sets up to the projection in the rivers direction along circumference slope and seals, and when discharge is less, because there is not the space in rivers direction in the rivers detection mechanism, interior rotation piece 20 can be steadily by little rivers striking and rotate with center pin piece 10 as the axle, and then drive the rotatory magnetic field that produces of magnetic rotor 60, at last realize the detection of discharge through the hall element 803 response magnetic field in pipeline or the valve body 80 outside.

In some embodiments, the magnetic rotor assembly further comprises an outer rotating piece 30 and a sleeve member 40, wherein the inner wall of the sleeve member 40 is connected with the inner rotating piece 20, the outer rotating piece 30 is provided with a plurality of outer rotating pieces 30 and is arranged on the outer wall of the sleeve member 40 in a circumferential inclined manner, the projections of the outer rotating pieces 30 in the water flow direction are closed, and the direction of the outer rotating piece 30 which is impacted by the water flow to drive the magnetic rotor 60 to rotate is identical to the direction of the inner rotating piece 20 which is impacted by the water flow to drive the magnetic rotor 60 to rotate. In the present embodiment, the magnetic rotor 60 is disposed on the outer rotary plate 30. The purpose of this embodiment is to further improve the structural stability of the water flow detection structure and ensure the detection function of small water flow, the outer sleeve can provide stronger rigidity for the overall structure, when the water flow is larger, the inner rotation piece 20 is prevented from being damaged by stronger impact force, meanwhile, in order not to affect the detection function of the water flow detection structure on the small water flow, the outer rotation pieces 30 are arranged on the outer wall of the outer sleeve, and likewise, each outer rotation piece 30 is regularly arranged along the circumferential direction based on the water flow direction, and in the rotation direction, the front end of each outer rotation piece 30 extends to the rear end of the previous outer rotation piece 30 when being observed in the water flow direction, under this structure, the water flow detection structure is rotated to any position and stopped, when the water flow flows to the water flow detection structure at any position, the water flow detection structure is contacted with a certain outer rotation piece 30, thereby generating acting force on the outer rotation piece 30, and rotating the water flow detection structure. When the water flow is small enough, the magnetic rotor can be driven to rotate only by the outer rotary piece 30, and when the water flow is increased, the inner rotary piece 20 and the outer rotary piece 30 together drive the magnetic rotor to rotate. Preferably, the surface of the inner rotary piece 20 and/or the outer rotary piece 30 contacting with the water flow is a curved surface, and the curvature of the curved surface can refer to the similar structure of the propeller in the prior art, so that the rotation speed of the water flow detection mechanism is increased under the same water flow effect, that is, the magnetic rotor 60 can generate a stronger magnetic field, so as to improve the sensing precision of the hall element 803.

In some embodiments, the width of the inner rotary piece 20 is greater than the width of the outer rotary piece 30, the width refers to the radial width, the inner rotary piece 20 is connected with the central shaft 10 and the outer sleeve at the same time, and the outer rotary piece 30 is only connected with the outer sleeve, so that the width of the inner rotary piece 20 is properly enlarged, and the width of the outer rotary piece 30 is properly reduced, which is beneficial to improving the rigidity strength of the water flow detection structure, making it more stable and impact resistant, less easy to damage and longer in service life.

In some embodiments, the device further comprises an outer casing 50, wherein a connecting portion 504 is disposed inside the outer casing 50, and the connecting portion 504 is rotatably connected to two ends of the central shaft 10. The connecting portion 504 may be a herringbone structure, and the center of the connecting portion 504 is rotatably connected with two ends of the central shaft body, so that the outer housing 50 can protect the internal component structures during transportation and assembly, and meanwhile, the installation and the subsequent replacement of parts are convenient. Preferably, the outer casing 50 includes a front outer casing 501 and a rear outer casing 502, and the front outer casing 501 and the rear outer casing 502 are detachably connected, so that the processing production and the combined installation are facilitated, and the production efficiency is improved.

The present utility model also provides a valve body 80 comprising:

a valve 801 for controlling the opening and closing state of the valve body 80, preferably, the valve 801 is a solenoid valve;

a control module 802, wherein a hall element 803 is electrically connected to the control module 802, and the hall element 803 is disposed close to the valve body 80; preferably, the control module 802 further includes a microprocessor, which may be a central processing unit (Central Processing Unit), generally composed of a logic operation unit, a control unit and a storage unit, and is electrically connected to the hall element 803, and through the microprocessor, water flow data can be calculated in real time according to the induction pulse signal of the hall element 803, so as to facilitate statistics and recording of the data;

in one of the above embodiments, the water flow detecting structure is disposed in the valve body 80 and is located at the sensing position of the hall element 803, when the water flow passes through the water flow detecting structure, the magnetic rotor 60 in the water flow detecting structure is driven to rotate, and the hall element 803 senses the magnetic field change and realizes water flow detection through calculation of the control module 802. The solenoid valve is electrically connected to the control module 802. Through setting up rivers detection structure in valve body 80, when little rivers leak valve 801, rivers detection structure can realize driving magnetic rotor 60 rotatory and carry out magnetic field induction through hall element 803, and control module 802 receives hall element 803's signal and carries out discharge calculation, at last through warning light, warning sound or through remote transmission signal to the host computer for the manager can discover, judge leaking the position, in time maintains the repair, avoids the waste of water resource.

When the water flow is conducted, the inner rotary piece 20 and/or the outer rotary piece 30 in the water flow detection mechanism rotate under the action of the water flow, and meanwhile, the magnetic rotor 60 is driven to rotate, when the magnetic rotor 60 enters the induction area (when the magnetic rotor is close to the Hall element 803), the Hall element 803 induces and sends out pulse signals, the pulse signals can be obtained through the control module 802, the rotation condition of the magnetic rotor 60 can be counted, GS values generated by one turn of the magnetic rotor 60 are converted into pulse signals and output to the control module 802, the control module 802 can calculate the water flow according to the quantity of the pulse signals, finally, the water flow value can be displayed through the display screen or can be opened or closed to an external electric appliance (such as an electromagnetic valve) through the control module 802 according to the real-time value of the water flow, and a connecting line is not seen in the figure, and the prior art is referred to.

In order to further improve the accuracy of water flow detection, the plane of the sensing surface of the hall element 803 passes through the rotating surface of the magnetic rotor 60 and is disposed in a cross manner. The rotation surface here is a circular surface formed by the rotation of the magnetic rotor 60, and the circumferential line of the circular surface may be a path line of one rotation at a point on the magnetic rotor 60. Preferably, the hall element 803 is disposed directly below the magnetic rotor 60. The sensing surface refers to a plane of a functional area where the hall element 803 can sense a magnetic field, and generally, the sensing surface is parallel to the upper surface of the hall element 803, so that the sensing surface is tiled inside the hall element 803, and more sensitive sensing is achieved. In actual use, the top surface of the hall element 803 (generally, the surface on which the chip is screen printed) can be directly regarded as an induction surface. In the prior art (e.g. in applicant's publication No. cn202122386198. X), the top surface of the hall element 803 is disposed directly opposite or opposite to the magnetic rotor 60, and the vertical line at the center of the top surface passes through the magnetic rotor 60, which the applicant has found is not optimal. The plane of the sensing surface of the hall element 803 of the present utility model passes through the rotating surface of the magnetic rotor 60 and is disposed in a cross manner, wherein the key point is that the plane of the sensing surface passes through the rotating surface of the magnetic rotor 60, and the center vertical line of the plane of the sensing surface passes through the magnetic rotor 60. The present utility model is also disposed in a cross manner, so that the sensing surface can sense the magnetism of the magnetic rotor 60 more fully. Of course, it is preferable that the plane of the sensing surface of the hall element 803 is perpendicular to the rotation surface of the magnetic rotor 60, and in this case, it is most preferable that the plane of the sensing surface of the hall element 803 coincides with the rotation axis of the magnetic rotor 60. Of course, the actual overlapping is not completely achieved due to machining errors, and it is considered that the overlapping is close to the overlapping. Thus, the plane where the sensing surface of the hall element 803 is located passes through the rotating surface of the magnetic rotor 60 and is in a cross arrangement, so that the magnet wire can be in greater contact with the sensing surface when the magnetic rotor 60 rotates, namely, the sensing surface can sense more magnet wires, so that the hall element 803 can be in contact with a stronger magnetic field, the magnetic force change detected by the hall sensor when the magnetic element is close to the hall sensor and is far away from the hall sensor is increased, and the hall element 803 is more sensitive to the rotation sensing of the magnetic rotor 60, so that the recognition and measurement of water flow with smaller flow are realized.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims (10)

1. The utility model provides a rivers detect structure, rivers detect the structure and locate the inside of pipeline or valve body and be located hall element's induction position simultaneously, rivers pass through the rivers drive the magnetic rotor who is located its inside outermost edge when detecting the structure and rotate, hall element response magnetic field changes and realizes discharge detection, its characterized in that: comprises a central shaft piece and an inner rotating piece;

the two ends of the central shaft piece are rotatably arranged in the pipeline or the valve body;

the plurality of inner rotating sheets are arranged on the outer wall of the central shaft piece in a circumferential inclined manner, and the projections of the plurality of inner rotating sheets in the water flow direction are closed;

the force generated when the water flow hits each inner rotating piece can drive the central shaft piece to rotate in the same direction, namely the magnetic rotor rotates in the same direction.

2. A water flow detection structure according to claim 1, wherein: the magnetic rotor is characterized by further comprising an outer rotating piece and a sleeve piece, wherein the inner wall of the sleeve piece is connected with the inner rotating piece, the outer rotating piece is arranged on the outer wall of the sleeve piece in a plurality of inclined circumferential directions, the projections of the outer rotating piece in the water flow direction are closed, and the outer rotating piece is impacted by water flow to drive the rotating direction of the magnetic rotor to be consistent with the rotating direction of the inner rotating piece which is impacted by water flow to drive the magnetic rotor to rotate.

3. A water flow detection structure according to claim 2, wherein: the surface of the inner rotary piece and/or the surface of the outer rotary piece, which is contacted with water flow, is a curved surface.

4. A water flow detection structure according to claim 2, wherein: the width of the inner rotary piece is larger than that of the outer rotary piece.

5. A water flow detection structure according to claim 2, wherein: the magnetic rotor is arranged on the outer rotary piece.

6. A water flow detection structure according to claim 1 or 2, characterized in that: the novel rotary shaft is characterized by further comprising an outer shell, wherein a connecting part is arranged in the outer shell and is rotatably connected with two ends of the central shaft.

7. The water flow detecting structure according to claim 6, wherein: the outer shell comprises a front outer shell body and a rear outer shell body, and the front outer shell body is detachably connected with the rear outer shell body.

8. A valve body, comprising:

the valve is used for controlling the on-off state of the valve body;

the control module is electrically connected with a Hall element, and the Hall element is arranged close to the valve body;

the water flow detection structure according to any one of claims 1-7, wherein the water flow detection structure is arranged in the valve body and located at the sensing position of the hall element, the magnetic rotor in the water flow detection structure is driven to rotate when the water flow passes through the water flow detection structure, and the hall element senses magnetic field change and realizes water flow detection through calculation of the control module.

9. A valve body as claimed in claim 8, wherein: the plane of the sensing surface of the Hall element passes through the rotating surface of the magnetic rotor and is arranged in a cross way.

10. A valve body as claimed in claim 8, wherein: the valve is an electromagnetic valve, and the electromagnetic valve is electrically connected with the control module.