A sensor for judging the depth of liquid in a pipeline by using electromagnetic induction

Abstract

The present invention discloses a sensor for judging the liquid depth in a pipeline by using electromagnetic induction. It is very difficult to measure the depth of liquid in an existing closed pipeline or to judge whether the pipeline is full. In the present invention, a T-shaped bracket is arranged in a circular hole at the top of the outer shell; the top end of the T-shaped bracket is connected to the outer shell, and the lower cylindrical part is arranged inside the outer shell. Five induction coils are arranged in the cylindrical part from top to bottom; an impeller is sleeved on the lower cylindrical part. The impeller floats on the liquid surface, and a magnet is arranged inside the impeller; when the impeller rotates, the magnet generates a rotating magnetic field and induces an electric current in the five induction coils; the induced current is transmitted to the data acquisition module of the liquid depth judging device, the liquid depth in the pipeline is obtained through the data processing module, and is sent to the display module to display the liquid depth in a text or graphic form. The present invention can judge the liquid depth in a horizontally laid pipeline, and solves the problem that it is impossible to judge the liquid depth or whether the pipeline is full in a closed liquid pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid detection in water supply pipes, and particularly relates to a sensor for judging the liquid depth in a pipe by using electromagnetic induction. Background Art

[0002] In daily work, in order to detect the liquid flow rate and pressure in a liquid pipe, various water meters usually need to be installed on the pipe. However, sometimes the liquid in the pipe may not fill the entire pipe, resulting in deviation of the measurement result. At the same time, due to the pipe being airtight, it is very difficult to judge the liquid depth in the pipe or whether the pipe is full. Summary of the Invention

[0003] In order to make up for the deficiencies of the prior art, the present invention provides a sensor for judging the liquid depth in a pipe by using electromagnetic induction, which can detect the liquid depth in a horizontally laid airtight pipe, so as to judge whether the pipe is full of liquid.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A sensor for judging the liquid depth in a pipe by using electromagnetic induction includes a housing. The left and right ends of the housing are communicated with the pipe to be detected, and a circular hole is provided at the center position of the top. A T-shaped bracket is arranged in the circular hole.

[0006] The top end of the T-shaped bracket is hermetically connected to the housing, and the lower cylinder is arranged in the internal cavity of the housing. Five induction coils are sequentially arranged in the lower cylinder from top to bottom.

[0007] An impeller is sleeved on the lower cylinder of the T-shaped bracket. The impeller floats on the liquid surface, and a magnet is arranged in the impeller. When the impeller rotates, the magnet generates a rotating magnetic field and generates induction currents with different magnitudes in the five induction coils.

[0008] The positive poles of the induction coil 1#, induction coil 2#, induction coil 3#, induction coil 4#, induction coil 5# and the common negative pole of the five induction coils are connected to the liquid depth judging device through signal lines.

[0009] The liquid depth judging device includes a data acquisition module, a data processing module, a display module and a power supply module. The induction currents generated in the five induction coils are transmitted to the data acquisition module, and the liquid depth in the pipe is obtained through processing by the data processing module and sent to the display module. The display module displays the liquid depth in the pipe in text or graphic form. The power supply module supplies power to the data acquisition module, the data processing module and the display module.

[0010] Specifically, a sealing ring is arranged at the contact position between the T-shaped bracket and the housing, and they are fixedly connected by screws and fixing screws.

[0011] Specifically, two cylindrical protrusions are provided on the lower cylinder of the T-shaped bracket to limit the up and down movement range of the impeller.

[0012] Specifically, the liquid depth judging device is arranged outside the housing.

[0013] Advantages of the present invention:

[0014] 1) By installing a sensor that uses electromagnetic induction to judge the liquid depth in the pipeline, the present invention can judge the liquid depth in the horizontally laid pipeline, so as to confirm whether the liquid in the pipeline is full or air-blocked, solving the problem that the liquid depth or whether the pipeline is full in the closed liquid pipeline cannot be judged, resulting in inaccurate detection of the liquid flow rate and pressure in the pipeline.

[0015] 2) The sensor of the present invention has a simple structure, is easy to install, and is inexpensive, and has broad market application prospects. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the liquid depth judging device of the present invention;

[0018] In the figure, 1 - screw, 2 - fixing screw rod, 3 - liquid depth judging device, 4 - positive pole of induction coil 1#, 5 - positive pole of induction coil 2#, 6 - positive pole of induction coil 3#, 7 - positive pole of induction coil 4#, 8 - positive pole of induction coil 5#, 9 - common negative pole of induction coils, 10 - T-shaped bracket, 11 - sealing ring, 12 - magnet, 13 - housing, 14 - impeller, 15 - cavity, 16 - induction coil, 17 - cylindrical protrusion, 18 - data acquisition module, 19 - data processing module, 20 - display module, 21 - power supply module. Detailed Embodiments

[0019] The present invention will be described in detail below in conjunction with specific embodiments.

[0020] As Figure 1 shown, the present invention includes a housing 13. A circular hole is provided at the center position of the top of the housing 13, and a T-shaped bracket 10 is arranged in the circular hole; the top end of the T-shaped bracket 10 is hermetically connected to the housing 13. A sealing ring 11 is arranged at the contact position between the T-shaped bracket 10 and the housing 13, and they are fixedly connected by a screw 1 and a fixing screw rod 2;

[0021] The lower cylinder of the T-shaped bracket 10 is arranged in the internal cavity of the housing 13, and five induction coils 16 are arranged in sequence from top to bottom in the lower cylinder;

[0022] The lower end of the T-shaped bracket 10 is sleeved with an impeller 14. The buoyancy of the cavity 15 in the impeller 14 causes the impeller 14 to float above the liquid level of the pipeline liquid and float up and down with the change of the liquid depth. A magnet 12 is arranged in the impeller 14. When the liquid flows, it drives the impeller 14 to rotate, so that the magnet 12 arranged in the impeller 14 rotates around the cylinder at the lower end of the T-shaped bracket 10 to generate a rotating magnetic field, and induced currents of different magnitudes are generated in the 5 induction coils 16 in the cylinder at the lower end of the T-shaped bracket 10 at the same time. Two cylindrical protrusions 17 are arranged on the cylinder at the lower end of the T-shaped bracket 10 to limit the up and down movement range of the impeller 14.

[0023] The positive poles 4 of the induction coil 1#, the positive poles 5 of the induction coil 2#, the positive poles 6 of the induction coil 3#, the positive poles 7 of the induction coil 4#, the positive poles 8 of the induction coil 5#, and the common negative pole 9 of the 5 induction coils 16 are connected to the liquid depth judging device 3 through signal lines. The liquid depth judging device 3 is arranged outside the housing 13.

[0024] As Figure 2 shown, the liquid depth judging device 3 includes a data acquisition module 18, a data processing module 19, a display module 20 and a power supply module 21. The induced currents generated in the 5 induction coils 16 are transmitted to the data acquisition module 18, and after being processed by the data processing module 19, the liquid depth in the pipeline is obtained and sent to the display module 20. The display module 20 displays the liquid depth in the pipeline in the form of text or graphics. The power supply module 21 supplies power to the data acquisition module 18, the data processing module 19 and the display module 20.

[0025] The working principle of the present invention is as follows:

[0026] This sensor is arranged at the pipeline position of the horizontally laid liquid pipeline that needs to detect the liquid depth. The tubular housing 13 of the sensor is connected as a whole with the pipeline that needs to detect the liquid depth, and the connection part is sealed.

[0027] When the liquid depth in the pipeline changes, the impeller 14 floats up and down with the liquid level. The liquid flow causes the impeller 14 to rotate. The magnet 1) arranged near the center of the impeller 14 is driven to rotate, forming a rotating magnetic field. Different magnitudes of induced currents are generated in the 5 induction coils 16 arranged from top to bottom in the lower cylinder of the T-shaped bracket 10 by the rotating magnetic field. At the same time, the induced current in the induction coil 16 with the largest horizontal projection area between the magnet 12 in the impeller 14 and a certain induction coil 16 is the largest, the induced current in the induction coil 16 with a small horizontal projection area is small, and the induced current in the induction coil 16 with a horizontal projection area of zero approaches zero.

[0028] The induced currents of the 5 induction coils 16 pass through 6 signal lines, namely the positive electrode 4 of the induction coil 1, the positive electrode 5 of the induction coil 2, the positive electrode 6 of the induction coil 3, the positive electrode 7 of the induction coil 4, the positive electrode 8 of the induction coil 5, and the common negative electrode 9 of the induction coils, and are transmitted to the data acquisition module 18 of the liquid depth determination device 3 through the T-shaped bracket 10;

[0029] The data acquisition module 18 collects in real time the induced currents of different magnitudes generated in the 5 induction coils 16, and after data acquisition and processing, sends them to the data processing module 19; the data processing module 19 obtains the upper and lower positions of the cylinder at the lower part of the T-shaped bracket 10 where the impeller 14 is located by comparing the magnitudes of the induced currents of the 5 induction coils 16 at the same time, and obtains the depth of the liquid in the pipeline, and sends it to the display module 20, and the display module 20 displays the depth of the liquid in the pipeline in text form or graphic form.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The content of the present invention is not limited to the examples listed. Any equivalent transformation of the technical solution of the present invention by those of ordinary skill in the art by reading the specification of the present invention is covered by the claims of the present invention.

Claims

1. A sensor for judging the liquid depth in a pipeline by electromagnetic induction, characterized in that: It includes a housing (13), both left and right ends of the housing (13) are connected to the pipeline to be detected, a circular hole is provided at the center position of the top, and a T-shaped bracket (10) is arranged in the circular hole; The top end of the T-shaped bracket (10) is hermetically connected to the housing (13), and the lower cylinder is arranged in the internal cavity of the housing (13). Five induction coils (16) are sequentially arranged in the lower cylinder from top to bottom; An impeller (14) is sleeved on the lower cylinder of the T-shaped bracket (10). The impeller (14) floats on the liquid surface, and a magnet (12) is arranged in the impeller (14); when the impeller (14) rotates, the magnet (12) generates a rotating magnetic field and generates induction currents with different magnitudes in the five induction coils (16); The positive electrode of induction coil 1# (4), the positive electrode of induction coil 2# (5), the positive electrode of induction coil 3# (6), the positive electrode of induction coil 4# (7), the positive electrode of induction coil 5# (8), and the common negative electrode of the induction coils (9) of the five induction coils (16) are connected to the liquid depth judging device (3) through signal lines; The liquid depth judging device (3) includes a data acquisition module (18), a data processing module (19), a display module (20), and a power supply module (21). The induction currents generated in the five induction coils (16) are transmitted to the data acquisition module (18), and after being processed by the data processing module (19), the liquid depth in the pipeline is obtained and sent to the display module (20). The display module (20) displays the liquid depth in the pipeline in text form or graphic form; the power supply module (21) supplies power to the data acquisition module (18), the data processing module (19), and the display module (20).

2. The sensor for judging the liquid depth in a pipeline by using electromagnetic induction according to claim 1, characterized in that: A sealing ring (11) is arranged at the contact position between the T-shaped bracket (10) and the housing (13), and they are fixedly connected by screws (1) and fixing screws (2).

3. A sensor for judging the liquid depth in a pipeline by using electromagnetic induction according to claim 2, characterized in that: Two cylindrical protrusions (17) are arranged on the lower cylinder of the T-shaped bracket (10) to limit the up and down movement range of the impeller (14).

4. A sensor for judging the depth of liquid in a pipeline by using electromagnetic induction according to claim 3, characterized in that: The liquid depth judging device (3) is arranged outside the housing (13).

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