Water flow sensor

Abstract

A water flow sensor comprises a main body, a cover body, a fixed shaft, a water impeller, an annular cover plate, a magnetic ring, a flat gasket and a Hall sensor, the cover body comprises a cover plate, a circular body part, a major arc-shaped cavity, a Hall cavity and a cover shaft seat, and the water impeller comprises a wheel shaft seat with a shaft hole, blades and an annular seat with an opening in one end. The magnetic ring is arranged in the annular seat, and the annular cover plate is embedded in the annular seat and fixes the magnetic ring; one end of the fixed shaft is fixed with the main body shaft seat, one flat gasket is arranged on the main body shaft seat, the fixed shaft penetrates through the shaft hole of the wheel shaft seat, and the other flat gasket is arranged at the end part of the wheel shaft seat; the circular body part is inserted into the impeller cavity and sealed, and the cover plate is attached to the open end of the impeller cavity; the other end of the fixed shaft is fixed with the cover shaft seat; the annular seat rotates in the major arc cavity; when the water flow pressure changes, the water impeller moves along the fixed shaft. Due to the fact that the water impeller moves along the fixed shaft and the flat gasket is arranged, wheel clamping is prevented, and sensitivity and precision are improved.

Description

Technical Field

[0001] This utility model relates to a water flow sensor. Background Technology

[0002] The existing technology, Chinese patent 201721643531.8, describes an anti-jamming water flow sensor, comprising: a base (1), an upper cover (3), a magnetic rotor (4), a guide shaft (5), a magnetic ring (6), a Hall effect sensing circuit assembly (9), and a cover plate (11), and also includes an isolation plate (2) and a retaining ring (7). The isolation plate (2) forms an upper cavity (10) between itself and the upper cover (3), and a lower cavity (20) between itself and the base (1). The magnetic rotor (4) includes a positioning post (401) and a turbine blade (402). The turbine blade (402) is installed and accommodated in the lower cavity (20). The positioning post (401) passes through the central through hole of the isolation plate (2) into the upper cavity (10), and the magnetic ring (6) is nested and fixed on the positioning post (401). The problem is that the structure is complex and the sensitivity is poor. Utility Model Content

[0003] The purpose of this invention is to provide a water flow sensor that features anti-jamming and high sensitivity.

[0004] This utility model is implemented as follows: a water flow sensor, characterized in that it includes a main body, a cover, a fixed shaft, a water impeller, an annular cover plate, a magnetic ring, a flat pad, and a Hall sensor.

[0005] The main body includes an inlet port, an open impeller chamber, a main shaft seat located on the bottom plate of the impeller chamber, and an outlet port;

[0006] The cover body includes a cover plate, a circular body, an arc-shaped cavity and a Hall cavity and a cover shaft seat disposed on the circular body, the cover shaft seat is disposed in the arc-shaped cavity, the arc-shaped cavity has an opening on the inner side, and the Hall cavity passes through the cover plate.

[0007] The water impeller includes a shaft seat with a shaft hole, blades, and an annular seat open at one end.

[0008] The magnetic ring is placed inside the annular seat, and the annular cover plate is embedded in the annular seat and fixes the magnetic ring; one end of the fixed shaft is fixed to the main shaft seat, and a flat washer is placed on the main shaft seat. The fixed shaft passes through the shaft hole of the wheel shaft seat, and another flat washer is placed at the end of the wheel shaft seat; the circular body is inserted into the impeller cavity and sealed, and the cover plate fits against the opening end of the impeller cavity; the other end of the fixed shaft is fixed to the cover shaft seat, and the annular seat rotates in the superior arc cavity; as the water pressure changes, the water impeller moves along the fixed shaft.

[0009] The water flow sensor is characterized in that the distance between the main shaft seat and the cover shaft seat is greater than the length of the wheel axle seat and the sum of the thicknesses of the two flat pads.

[0010] The water flow sensor described above is characterized in that: the water impeller is made of plastic material, and the flat pad is made of plastic material.

[0011] The water flow sensor is characterized in that the water impeller is made of plastic material and the flat pad is made of ceramic material.

[0012] The water flow sensor described above is characterized in that: the open end of the impeller cavity is provided with a countersunk hole, and a sealing ring is also included;

[0013] The circular body portion is provided with a neck adjacent to the cover plate;

[0014] The sealing ring is placed inside the countersunk hole, and the neck is inserted into the countersunk hole to press the sealing ring tightly.

[0015] The water flow sensor described above is characterized in that the two ends of the wheel axle seat are shaped like a frustum.

[0016] The water flow sensor described above is characterized in that: the cover plate is provided with a cover fixing plate and a cover half hole communicating with the Hall cavity, and the cover fixing plate is provided with a connection hole;

[0017] It also includes a top cover, which has a top fixing plate and a top half hole;

[0018] The top cover fits snugly against the cover plate, and the half-hole in the cover and the half-hole in the top form a data cable hole; screws pass through the top fixing plate and the cover fixing plate and are screwed into the fixing seat of the main body.

[0019] This utility model discloses a water flow sensor. Due to its structure, changes in water pressure, movement of the impeller along a fixed axis, and the setting of the flat pad prevent wheel jamming and improve sensitivity and accuracy. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention.

[0021] Figure 2 yes Figure 1 A-A view.

[0022] Figure 3 This is one of the exploded perspective views of this utility model.

[0023] Figure 4 This is the second exploded perspective view of this utility model.

[0024] Figure 5 This is a perspective view of the present invention. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figure 1 , Figure 2 , Figure 3 As shown, a water flow sensor includes a main body 1, a cover 2, a fixed shaft 3, a water impeller 4, an annular cover plate 215, a magnetic ring 6, a flat pad 7, and a Hall sensor (not shown in the figure).

[0028] The main body 1 includes a water inlet 11, an impeller cavity 12 with an opening, a main body bearing 13 located on the bottom plate of the impeller cavity 12, and a water outlet 14;

[0029] The cover 2 includes a cover plate 21, a circular body portion 22, an arc-shaped cavity 23 disposed on the circular body portion 22, a cover shaft seat 24, and a Hall cavity 25. The cover shaft seat 24 is disposed inside the arc-shaped cavity 23, which has an inner opening. The Hall cavity 25 is disposed on the circular body portion 22 and penetrates the cover plate 21, having an outer opening. The Hall cavity 25 and the arc-shaped cavity 23 correspond to each other.

[0030] The water impeller 4 includes a wheel and shaft seat 41 with a shaft hole, several blades 42, and an annular seat 43 with one end open.

[0031] A magnetic ring 6 is housed within an annular seat 43, and an annular cover plate 215 is embedded within the annular seat 43, fixing the magnetic ring 6. One end of a fixed shaft 3 is fixed to the main shaft seat 13, and a flat washer 7 is placed on the main shaft seat 13. The fixed shaft 3 passes through the shaft hole of the wheel axle seat 41, and another flat washer 7 is placed at the end of the wheel axle seat 41. A circular body 22 is inserted into and sealed within the impeller cavity 12, and the cover plate 21 is fitted against the open end of the impeller cavity 12. The other end of the fixed shaft 3 is fixed to the cover shaft seat 24, and the annular seat 43 rotates within the superior arc cavity. The flat washer reduces the friction between the wheel axle seat and the main shaft seat 13 or the cover shaft seat 24, improving sensitivity and accuracy. Changes in water pressure cause the impeller to move along the fixed shaft and engage with the flat washer, preventing wheel jamming.

[0032] As a further improvement of this utility model: the distance between the main shaft seat 13 and the cover shaft seat 24 is greater than the length of the wheel axle seat 41 and the sum of the thicknesses of the two flat pads 7, and the difference between the two is less than or equal to 0.6 mm. When the water flow pressure changes, the water blade shaft 4 moves along the fixed axis 5 to prevent the wheel from jamming.

[0033] The two ends of the wheel axle seat 41 are shaped like a ping-pong table.

[0034] As a further improvement of this utility model: the water impeller 4 is made of plastic material, and the flat pad 7 is made of plastic material;

[0035] Alternatively, the water impeller 4 may be made of plastic material, and the flat pad 7 may be made of ceramic material.

[0036] As a further improvement of this utility model: the open end of the impeller cavity 12 is provided with a countersunk hole 121, and also includes a sealing ring (not shown in the figure);

[0037] The circular body portion 22 is provided with a neck 26 adjacent to the cover plate 21;

[0038] The sealing ring is placed inside the countersunk hole 121, and the neck 26 is inserted into the countersunk hole 121 to press the sealing ring.

[0039] As a further improvement of this utility model: the cover plate 21 is provided with a cover fixing seat plate 211 and a cover half hole 212 communicating with the Hall cavity 25, and the cover fixing seat is provided with a connecting hole.

[0040] It also includes a top cover 8, which has a top fixing plate 81 and a top half hole 82;

[0041] The top cover 8 fits into the cover plate 21, and the cover half hole 212 and the top half hole 83 form a data cable hole; the screw passes through the top fixing plate 81 and the cover fixing plate 211 and is screwed into the fixing seat 15 of the main body 1.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water flow sensor, characterized by: Includes the main body, cover, fixed shaft, water impeller, annular cover plate, magnetic ring, flat gasket, and Hall sensor. The main body includes an inlet port, an open impeller chamber, a main shaft seat located on the bottom plate of the impeller chamber, and an outlet port; The cover body includes a cover plate, a circular body, an arc-shaped cavity and a Hall cavity and a cover shaft seat disposed on the circular body, the cover shaft seat is disposed in the arc-shaped cavity, the arc-shaped cavity has an opening on the inner side, and the Hall cavity passes through the cover plate. The water impeller includes a shaft seat with a shaft hole, blades, and an annular seat open at one end. The magnetic ring is placed inside the annular seat, and the annular cover plate is embedded in the annular seat and fixes the magnetic ring; one end of the fixed shaft is fixed to the main shaft seat, and a flat washer is placed on the main shaft seat. The fixed shaft passes through the shaft hole of the wheel shaft seat, and another flat washer is placed at the end of the wheel shaft seat; the circular body is inserted into the impeller cavity and sealed, and the cover plate fits against the opening end of the impeller cavity; the other end of the fixed shaft is fixed to the cover shaft seat, and the annular seat rotates in the superior arc cavity; as the water pressure changes, the water impeller moves along the fixed shaft.

2. A water flow sensor according to claim 1, wherein: The distance between the main axle seat and the cover axle seat is greater than the length of the wheel axle seat and the sum of the thicknesses of the two flat pads.

3. The water flow sensor of claim 1, wherein: The water impeller is made of plastic material, and the flat pad is made of plastic material.

4. The water flow sensor of claim 1, wherein: The water impeller is made of plastic material, and the flat pad is made of ceramic material.

5. The water flow sensor of claim 1, wherein: The impeller cavity has a countersunk hole at its open end and also includes a sealing ring; The circular body portion is provided with a neck adjacent to the cover plate; The sealing ring is placed inside the countersunk hole, and the neck is inserted into the countersunk hole to press the sealing ring tightly.

6. The water flow sensor of claim 1, wherein: The two ends of the wheel axle seat are shaped like a ping-pong table.

7. A water flow sensor according to claim 1, 2, 3, 4, 5 or 6, wherein: The cover plate is provided with a cover fixing seat plate and a cover half hole communicating with the Hall cavity; the cover fixing seat plate is provided with a connection hole. It also includes a top cover, which has a top fixing plate and a top half hole; The top cover fits snugly against the cover plate, and the half-hole in the cover and the half-hole in the top form a data cable hole; screws pass through the top fixing plate and the cover fixing plate and are screwed into the fixing seat of the main body.

Images