Impeller flowmeter with water immersion detection

Abstract

The utility model discloses a kind of impeller flowmeter with water immersion detection, including the mounting seat fixed in flange, the mounting seat is equipped with bulkhead, the cavity of mounting seat is divided into water guide cavity and sealed cavity along bulkhead, the detection head of water immersion sensor is equipped on bulkhead, the circuit board of water immersion sensor is installed in sealed cavity, multiple rotors are rotatably arranged in water guide cavity, part of the rotor protrudes in the cavity of flange, magnet is fixed on the rotor, Hall element for inducting magnet is installed in sealed cavity. Compared with prior art, when pipeline has water, rotor is rotated, flow rate is detected by Hall element and magnet on rotor cooperation. When flow rate is zero, whether there is water in pipeline is judged by whether water guide cavity has water through water immersion sensor. Overall structure is simple, component is integrated on flange, can be installed quickly by flange, and installation process is less.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to an impeller flow meter with water immersion detection. Background Technology

[0002] Existing products only have flow measurement functionality, which is too limited. When the flow rate is zero, there are two possible operating conditions: one is that the liquid in the pipe is stagnant (there is liquid but it is not flowing), and the other is that there is no liquid in the pipe at all. Due to the lack of ability to detect the presence or absence of liquid in the pipe, the existing equipment cannot distinguish between these two fundamentally different situations, resulting in a blind spot in operating condition judgment and affecting the reliability and safety of the system. Utility Model Content

[0003] This invention provides an impeller flow meter with water immersion detection to solve the problem that existing flow meters have difficulty in determining whether there is water in the pipe when the flow rate is zero.

[0004] This utility model provides an impeller flow meter with water immersion detection, including a mounting base fixed inside a flange. The mounting base is provided with a water baffle plate. The cavity of the mounting base is divided into a water inlet cavity and a sealing cavity along the water baffle plate. The water baffle plate is provided with a detection head of a water immersion sensor. The sealing cavity is equipped with a circuit board of the water immersion sensor. Multiple rotating vanes are rotatably arranged inside the water inlet cavity. Some of the rotating vanes extend out of the cavity of the flange. Magnets are fixed on the rotating vanes. A Hall element for sensing the magnets is installed inside the sealing cavity.

[0005] Preferably, the front end of the mounting base is snapped into the flange, the flange is threaded with a lock nut, the lock nut is located behind the mounting base, and a first sealing ring is provided between the mounting base and the flange.

[0006] Preferably, the sealing cavity is a stepped hole, and a circuit board and a pressure ring are provided in the larger hole of the stepped hole. The pressure ring is located between the locking nut and the circuit board, and the circuit board and Hall element of the water immersion sensor are mounted on the circuit board.

[0007] Preferably, a wheel axle is fixed on the rotating plate, and the two ends of the wheel axle are rotatably mounted on the mounting base.

[0008] Preferably, a weight-reducing hole is provided at the middle position of the rotating plate, and the wheel axle passes through the weight-reducing hole.

[0009] Preferably, the edge of the rotating plate is provided with a mounting hole, and the magnet is fixed in the mounting hole.

[0010] Preferably, an adapter is provided behind the locking nut, the adapter is threadedly connected to the flange, and the adapter has a wire hole communicating with the sealing cavity.

[0011] Preferably, the adapter has a pressure edge on the outside of the flange, and a second sealing ring is provided between the pressure edge and the flange.

[0012] Preferably, the flange is equipped with a pressure sensor, and the flange has a water inlet in front of the pressure sensor.

[0013] Preferably, the rear end of the adapter is connected to a housing, and the housing has interfaces on both sides, one interface for connecting the pressure sensor cable and the other interface for connecting the pressure sensor cable and the circuit board cable.

[0014] Compared with existing technologies, in this invention, when water flows through the pipe, it drives the rotating vane to rotate, and the flow velocity is detected by a Hall element in conjunction with a magnet on the vane. When the flow velocity is zero, a water immersion sensor detects whether there is water in the water inlet chamber to determine whether there is water in the pipe. The overall structure is simple, with components integrated on the flange, enabling quick installation through the flange and reducing installation steps. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure label:

[0020] 1. Flange, 2. Mounting base, 3. Waterproof plate, 4. Rotating plate, 5. Magnet, 6. Locking nut, 7. First sealing ring, 8. Pressure ring, 9. Circuit board, 01. Axle, 02. Adapter, 03. Second sealing ring, 04. Pressure sensor, 05. Housing, 06. Interface, 11. Water inlet hole, 21. Water inlet chamber, 22. Sealing chamber, 41. Weight reduction hole, 021. Wire hole, 022. Pressing edge. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] See attached document Figure 1-2 This embodiment provides an impeller flow meter with water immersion detection, including a mounting base 2 fixed inside a flange 1. The mounting base 2 has a water baffle 3. The chamber of the mounting base 2 is divided into a water inlet chamber 21 and a sealing chamber 22 along the water baffle 3. The water inlet chamber 21 communicates with the chamber of the flange 1. A detection head of a water immersion sensor is provided on the water baffle 3. A circuit board of the water immersion sensor is installed in the sealing chamber 22. Multiple rotating vanes 4 are rotatably arranged in the water inlet chamber 21. Some of the rotating vanes 4 extend out of the chamber of the flange 1 to facilitate the rotation of the rotating vanes 4 by the water flow in the pipeline. A magnet 5 is fixed on the rotating vane 4. A Hall element for sensing the magnet 5 is installed in the sealing chamber 22. A flow detection circuit board is installed in the sealing chamber 22, and the Hall element is mounted on the flow detection circuit board. In this utility model, the flow meter is installed on the pipeline through the flange 1, which facilitates the disassembly and assembly of the flow meter. When water flows through the pipeline, it will push the rotating vanes 4 to rotate. The rotating vanes 4 drive the magnet 5 to rotate around the axis of the rotating vanes 4, causing a change in the magnetic field. The Hall element measures the flow velocity by detecting the change in the magnetic field based on the Hall effect. When the fluid pushes the rotating plate 4 with the magnet to rotate, the change in the magnetic field is converted into an electrical pulse signal, and the pulse frequency is proportional to the flow velocity. When the flow velocity in the pipe is zero, the water immersion sensor determines whether there is water in the pipe by detecting whether there is water in the water inlet chamber 21.

[0023] One embodiment of fixing the mounting base 2 to the flange 1: The front end of the mounting base 2 is snapped into the flange 1, and a locking nut 6 is threaded onto the flange 1. The locking nut 6 is located behind the mounting base 2, and a first sealing ring 7 is provided between the mounting base 2 and the flange 1. The flange 1 has a step. After the mounting base 2 is inserted into the flange 1, it is blocked by the step, and then the locking nut 6 locks the mounting base 2 onto the step.

[0024] As another embodiment of this utility model: refer to the appendix Figure 3 The sealing cavity 22 is a stepped hole. The small hole of the stepped hole is close to the water-proof plate 3, and the large hole is close to the locking nut 6. The circuit board 9 and the pressure ring 8 are installed in the large hole of the stepped hole. The pressure ring 8 is located between the locking nut 6 and the circuit board 9. The pressure ring 8 fixes the circuit board 9 on the step of the stepped hole. The circuit board of the water immersion sensor and the flow detection circuit board are integrated on the circuit board 9.

[0025] As another embodiment of this utility model: a wheel axle 01 is fixed on the rotating plate 4, and the two ends of the wheel axle 01 are rotatably mounted on the mounting base 2.

[0026] As another embodiment of this utility model: a weight reduction hole 41 is provided in the middle position of the rotating plate 4, and the wheel axle 01 passes through the weight reduction hole 41. This structural design can effectively reduce the weight of the rotating plate 4.

[0027] One embodiment of magnet 5: The edge of the rotating plate 4 is provided with mounting holes, and magnet 5 is fixed in the mounting holes. The two magnets 5 on the rotating plate 4 are symmetrically distributed along the wheel axle 01.

[0028] As another embodiment of this utility model: a connector 02 is provided behind the locking nut 6. The connector 02 is threadedly connected to the flange 1. The connector 02 is provided with a wire hole 021 that communicates with the sealing cavity 22. The cable on the circuit board 9 passes through the wire hole 021 and is connected to the external device.

[0029] As another embodiment of the present invention: the adapter 02 has a pressure edge 022 on the outside of the flange 1, and a second sealing ring 03 is provided between the pressure edge 022 and the flange 1. The flange 1 has an installation groove, and the second sealing ring 03 is located in the installation groove.

[0030] As another embodiment of this utility model: a pressure sensor 04 is provided on the flange 1, and a water inlet 11 is provided in front of the pressure sensor 04 on the flange 1. The pressure sensor 04 is used to detect the water pressure in the flange 1, that is, to detect the water pressure in the pipeline.

[0031] In another embodiment of this utility model: the rear end of the adapter 02 is connected to a housing 05, which includes a main body and a top cover. The main body and the top cover are detachably connected. Interfaces 06 are provided on both sides of the housing 05. One interface 06 is used to connect the cable of the pressure sensor 04, and the other interface 06 is used to connect the cable of the pressure sensor 04 and the cable of the circuit board 9. The cable of the pressure sensor 04 enters the housing 05 through one interface 06, merges with the cable of the circuit board 9, and then connects to an external device through the other interface 06.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An impeller flow meter with water immersion detection, characterized in that, The device includes a mounting base fixed inside a flange, the mounting base having a water baffle plate, the cavity of the mounting base being divided into a water inlet cavity and a sealing cavity along the water baffle plate, the water baffle plate having a detection head for a water immersion sensor, the sealing cavity having a circuit board for the water immersion sensor installed, the water inlet cavity having multiple rotating plates rotatably arranged inside, some of the rotating plates extending out of the flange cavity, the rotating plates having magnets fixed on them, and the sealing cavity having a Hall element for sensing the magnets installed.

2. The impeller flowmeter with water immersion detection according to claim 1, characterized in that, The front end of the mounting base is snapped into the flange, and the flange is threaded with a lock nut. The lock nut is located behind the mounting base, and a first sealing ring is provided between the mounting base and the flange.

3. The impeller flowmeter with water immersion detection according to claim 2, characterized in that, The sealing cavity is a stepped hole, and a circuit board and a pressure ring are provided in the larger hole of the stepped hole. The pressure ring is located between the locking nut and the circuit board. The circuit board and Hall element of the water immersion sensor are mounted on the circuit board.

4. The impeller flowmeter with water immersion detection according to claim 3, characterized in that, A wheel axle is fixed on the rotating plate, and the two ends of the wheel axle are rotatably mounted on the mounting base.

5. The impeller flowmeter with water immersion detection according to claim 4, characterized in that, The rotating plate has a weight-reducing hole in the middle, and the wheel axle passes through the weight-reducing hole.

6. The impeller flowmeter with water immersion detection according to claim 5, characterized in that, The edge of the rotating plate is provided with mounting holes, and the magnet is fixed in the mounting holes.

7. The impeller flowmeter with water immersion detection according to claim 6, characterized in that, An adapter is provided behind the locking nut. The adapter is threadedly connected to the flange. The adapter has a wire hole that communicates with the sealing cavity.

8. The impeller flowmeter with water immersion detection according to claim 7, characterized in that, The adapter has a pressure edge on the outside of the flange, and a second sealing ring is provided between the pressure edge and the flange.

9. The impeller flowmeter with water immersion detection according to claim 8, characterized in that, The flange is equipped with a pressure sensor, and the flange has a water inlet in front of the pressure sensor.

10. The impeller flowmeter with water immersion detection according to claim 9, characterized in that, The adapter is connected to a housing at its rear end. The housing has interfaces on both sides. One interface is used to connect the cable of the pressure sensor, and the other interface is used to connect the cable of the pressure sensor and the cable of the circuit board.

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