Photoelectric turbine flowmeter based on planar magnetic coupling and right-angle gear commutator

Abstract

The utility model discloses a photoelectric turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, and relates to the technical field of measurement. The device comprises a turbine rotating mechanism and a detection unit, and the turbine rotating mechanism comprises a shell, a front fluid director, a rear fluid director, a turbine assembly, a right-angle gear commutator, a first plane magnetic coupling and a second plane magnetic coupling, the detection unit comprises a detection cavity and a photoelectric rotating speed sensing device arranged in the detection cavity; axial rotation is converted into transverse rotation through the right-angle gear commutator and the first plane magnetic coupling, the transverse rotation is transmitted to the second plane magnetic coupling in the detection cavity, and the rotation speed of the second plane magnetic coupling is obtained through detection of the photoelectric rotation speed sensing device. And the photoelectric rotating speed sensing device in the detection cavity is not polluted by substances in the shell and is not easily influenced by a magnetic field, high temperature and high pressure, so that the measured flow is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to an optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator. Background Art

[0002] Traditional turbine flowmeters generally consist of a display instrument and a turbine transmitter. The transmitter mainly consists of a signal detection amplifier, a turbine, a shaft and bearing assembly, a flow straightener, and a housing, etc. The signal detection amplifier generally adopts the variable reluctance signal detection principle, and its main components include a permanent magnet, an iron core, and an electromagnetic coil. According to the principle of electromagnetic induction, the periodic rotation of the turbine blades causes a periodic change in the magnetic resistance value in the magnetoelectric detector, and a pulsating electromotive force will be generated in the induction coil. The frequency of this electromotive force signal is proportional to the flow rate of the measured fluid. The generated periodic induced electromotive force, that is, the electrical pulse signal, is sent to the display instrument for display after being processed by the detector.

[0003] The authorized announcement number is CN114279510B, and the name is a turbine flowmeter with anti-electromagnetic interference. This turbine flowmeter includes: a housing, a front flow straightener, a rear flow straightener, a double impeller assembly, a detection probe, and a signal converter. Among them, the housing has a tubular structure with a fluid passage inside. The middle section of the fluid passage is a turbine chamber; a probe installation groove is provided on the outer wall of the housing corresponding to the turbine chamber. The double impeller assembly is located in the turbine chamber of the fluid passage; the double impeller assembly includes a first impeller, a second impeller, and an impeller shaft. One end of the impeller shaft is rotatably connected to the front flow straightener, and the other end is rotatably connected to the rear flow straightener. The detection probe is located in the probe installation groove; the detection probe includes a first probe and a second probe, and the detection probe uses an electromagnetic induction type probe to obtain a feedback signal. The signal converter is used to output corresponding flow detection data according to the feedback signal; it solves the problem that the turbine flowmeter has poor anti-interference ability against changing magnetic fields. However, since the detection probe is located in the fluid passage and the detection probe uses an electromagnetic induction type probe to obtain a feedback signal, there will still be problems of the influence of magnetic fields, high temperature, and high pressure, resulting in inaccurate measurement.

[0004] The authorized announcement number is CN219589733U, and the name is an anti-interference liquid turbine flowmeter. It adopts a single-turbine and double-probe structural design; among them, the double probes are installed at positions where the impeller phase difference signal can be collected, and two synchronous detection signals with a phase difference are collected through a signal processing module, and then the interference signals in the signals are eliminated during the signal processing of different detection signals, thereby improving the detection accuracy and reliability of the turbine flowmeter in a complex electromagnetic interference environment. However, since the measurement probe is located in the fluid passage and the detection probe uses an electromagnetic induction type probe to obtain a feedback signal, there will still be problems of the influence of magnetic fields, high temperature, and high pressure, resulting in inaccurate measurement. Content of the Utility Model

[0005] The utility model provides an optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, which solves the technical problem of inaccurate flow measurement under the influence of magnetic fields, high temperatures, and high pressures.

[0006] To solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] An optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator includes a turbine rotating mechanism and a detection unit. The turbine rotating mechanism includes a housing, a front flow deflector, a rear flow deflector, a turbine assembly, a right-angle gear commutator, a first planar magnetic coupling, and a second planar magnetic coupling disposed inside the housing. The turbine assembly includes a turbine and a turbine shaft. One end of the turbine shaft is fixedly connected to the front flow deflector, and the other end of the turbine shaft is fixedly connected to the rear flow deflector. The turbine is fixedly connected to the turbine shaft, the right-angle gear commutator is fixedly connected to the turbine shaft, and the first planar magnetic coupling is fixedly connected to the driving worm of the right-angle gear commutator. The detection unit includes a detection cavity and an optoelectronic rotational speed sensing device disposed inside the detection cavity. The detection cavity is fixedly connected to the outer surface of the housing, and the second planar magnetic coupling is located inside the detection cavity on the side of the first planar magnetic coupling and is rotatably connected to the detection cavity.

[0008] A further technical solution lies in that: the optoelectronic rotational speed sensing device includes an optoelectronic encoder disk, a signal transmitter, and a signal receiver. The optoelectronic encoder disk is fixedly connected to the second planar magnetic coupling, and both the signal transmitter and the signal receiver are fixedly connected to the inner wall of the detection cavity. The signal transmitter is located on one side of the optoelectronic encoder disk, and the signal receiver is located on the other side of the optoelectronic encoder disk.

[0009] A further technical solution lies in that: a turbine cavity is provided inside the housing, and the front flow deflector, the rear flow deflector, the turbine assembly, the right-angle gear commutator, and the first planar magnetic coupling are all located inside the turbine cavity.

[0010] A further technical solution lies in that: the second planar magnetic coupling is magnetically connected to the first planar magnetic coupling, and the optoelectronic rotational speed sensing device is a rotational speed sensing device for detecting the rotational speed of the second planar magnetic coupling.

[0011] A further technical solution lies in that: it further includes a signal processing unit and a display. The optoelectronic rotational speed sensing device is connected and communicates with the signal processing unit, and the signal processing unit is connected and communicates with the display.

[0012] A further technical solution lies in that: it further includes a management terminal, and the management terminal is connected and communicates with the signal processing unit.

[0013] A further technical solution lies in that: the management terminal is a desktop computer or a smart phone.

[0014] The beneficial effects of adopting the above technical solutions are as follows:

[0015] First, an optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator includes a turbine rotating mechanism and a detection unit. The turbine rotating mechanism includes a housing, a front flow deflector, a rear flow deflector, a turbine assembly, a right-angle gear commutator, a first planar magnetic coupling, and a second planar magnetic coupling arranged inside the housing. The turbine assembly includes a turbine and a turbine shaft. One end of the turbine shaft is fixedly connected to the front flow deflector, and the other end of the turbine shaft is fixedly connected to the rear flow deflector. The turbine is fixedly connected to the turbine shaft. The right-angle gear commutator is fixedly connected to the turbine shaft, and the first planar magnetic coupling is fixedly connected to the driving worm of the right-angle gear commutator. The detection unit includes a detection cavity and an optoelectronic rotational speed sensing device arranged inside the detection cavity. The detection cavity is fixedly connected to the outer surface of the housing. The second planar magnetic coupling is located inside the detection cavity on the side of the first planar magnetic coupling and is rotatably connected to the detection cavity. In this technical solution, the axial rotation is converted into lateral rotation through the right-angle gear commutator and the first planar magnetic coupling and transmitted to the second planar magnetic coupling inside the detection cavity. The rotational speed of the second planar magnetic coupling is detected by the optoelectronic rotational speed sensing device. Since the space inside the detection cavity is independent of the housing, the optoelectronic rotational speed sensing device inside the detection cavity will not be contaminated by the substances inside the housing and is not easily affected by magnetic fields, high temperatures, and high pressures, thereby making the measurement of the flow rate accurate.

[0016] Second, the optoelectronic rotational speed sensing device includes an optoelectronic encoder disk, a signal transmitter, and a signal receiver. The optoelectronic encoder disk is fixedly connected to the second planar magnetic coupling. The signal transmitter and the signal receiver are both fixedly connected to the inner wall of the detection cavity. The signal transmitter is located on one side of the optoelectronic encoder disk, and the signal receiver is located on the other side of the optoelectronic encoder disk. In this technical solution, by adopting the right-angle gear commutator and the optoelectronic encoder disk, the optoelectronic encoder disk rotates at the same speed as the turbine of the flowmeter, making the detection more efficient and eliminating the need for overly complex calculation and transformation.

[0017] Third, it further includes a signal processing unit and a display. The optoelectronic rotational speed sensing device is connected and communicates with the signal processing unit, and the signal processing unit is connected and communicates with the display. In this technical solution, when the signal processing unit receives the electrical signal sent by the signal receiver, the signal processing unit processes the signal and displays the flow velocity and flow rate of the fluid through the display.

[0018] Fourth, it further includes a management terminal, which is connected and communicates with the signal processing unit. This technical solution facilitates the collection of the detection data uploaded by the processing unit and is convenient for further management and use.

[0019] See the description in the specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the structural diagram of Embodiments 1 to 3 of the present utility model;

[0021] Figure 2 is Figure 1 the structural diagram of the optical encoder disk in

[0022] Figure 3 is the principle block diagram of Embodiment 2 of the present utility model;

[0023] Figure 4 is the principle block diagram of Embodiment 3 of the present utility model.

[0024] Wherein: 1 housing, 2 front deflector, 3 rear deflector, 4 turbine, 5 right-angle gear commutator, 6 first planar magnetic coupling, 7 second planar magnetic coupling, 8 detection cavity, 9 optical encoder disk, 10 signal transmitter, 11 signal receiver. SPECIFIC IMPLEMENTATION MANNER

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application, but the present application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] Embodiment 1:

[0028] As Figure 1As shown in the figure, the utility model discloses an optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, which comprises a turbine rotating mechanism and an optoelectronic speed detection unit. The turbine rotating mechanism includes a housing 1, a front flow guide 2, a rear flow guide 3, a turbine 4, a turbine shaft, a right-angle gear commutator 5, a first planar magnetic coupling 6 and a second planar magnetic coupling 7. A turbine chamber is provided in the housing 1. The front flow guide 2, the rear flow guide 3, the turbine 4, the turbine shaft, the right-angle gear commutator 5 and the first planar magnetic coupling 6 are all located in the turbine chamber. One end of the turbine shaft is fixedly connected to the front flow guide 2, and the other end of the turbine shaft is fixedly connected to the rear flow guide 3. The turbine 4 is fixedly connected to the turbine shaft, the right-angle gear commutator 5 is fixedly connected to the turbine shaft, and the first planar magnetic coupling 6 is fixedly connected to the driving worm of the right-angle gear commutator 5. The turbine rotating mechanism of this application has the same basic structure as the turbine rotating mechanism in the traditional turbine flowmeter, except that a right-angle gear commutator 5 is added to the main transmission shaft of the turbine to convert the axial rotation into a transverse rotation, and drive the magnetic coupling mechanism on the driving worm, that is, the first planar magnetic coupling 6 and the second planar magnetic coupling 7, and transmit it to the optoelectronic encoder code disk 9 fixed in the airtight and pressureless meter head, that is, the detection cavity 8.

[0029] Based on the planar magnetic coupling and the right-angle gear commutator 5, this application designs the magnetoresistive turbine flowmeter as an optoelectronic turbine flowmeter, which has a simple structure and low cost, effectively overcomes the interference of external magnetic fields, especially the 50Hz magnetic field of the commercial power supply, and can be applied to the flow control of equipment with low-frequency magnetic interference such as solenoid valves.

[0030] As Figure 2 shown, it is the optoelectronic encoder code disk 9.

[0031] The photoelectric rotation speed detection unit includes a detection cavity 8 and a photoelectric rotation speed sensing device fixed inside the detection cavity 8. The photoelectric rotation speed sensing device includes a photoelectric encoder disk 9, a signal transmitter 10, and a signal receiver 11. The detection cavity 8 is fixedly connected to the outer surface of the housing 1. The second planar magnetic coupling 7, the photoelectric encoder disk 9, the signal transmitter 10, and the signal receiver 11 are all located inside the detection cavity 8. The second planar magnetic coupling 7 is magnetically connected to the first planar magnetic coupling 6, and the second planar magnetic coupling 7 is rotatably connected to the detection cavity 8. The photoelectric encoder disk 9 is fixedly connected to the second planar magnetic coupling 7. The signal transmitter 10 and the signal receiver 11 are both fixedly connected to the inner wall of the detection cavity 8. The signal transmitter 10 is located on one side of the photoelectric encoder disk 9, and the signal receiver 11 is located on the other side of the photoelectric encoder disk 9. The signal transmitter 10 and the signal receiver 11 are photoelectric probes. The photoelectric probes and the photoelectric encoder disk 9 are enclosed in a closed space, namely the detection cavity 8, which is not easily contaminated, ensuring the accuracy and reliability of the detection signal. The photoelectric encoder disk 9 rotates at the same speed as the turbine 4 of the flowmeter. The optical signal passing through the photoelectric encoder disk 9 forms a periodic waveform. The signal receiver 11 receives the optical signal sent by the signal transmitter 10, generates an electrical signal, and sends it to the signal processing unit.

[0032] This application combines the characteristics that photoelectric signals are not easily affected by high temperature and high pressure, have strong anti-electromagnetic interference ability, and are safer in flammable and explosive environments with the mature axial turbine flow detection technology to form a new type of photoelectric axial turbine flowmeter. Based on the planar magnetic coupling and the right-angle gear commutator 5, the photoelectric signal is connected to an independent space, namely the detection cavity 8, so as to realize photoelectric detection and make it not affected by whether the measured fluid is transparent or not and its cleanliness. Through testing on the water circulation test bench, the influence of environmental electromagnetic interference can be completely eliminated.

[0033] Embodiment 2:

[0034] As Figure 1 and Figure 3 shown, the present utility model discloses a photoelectric turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, which includes the photoelectric turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator described in Embodiment 1, and further includes a signal processing unit and a display. The signal processing unit is connected and communicates with the signal transmitter 10. The signal receiver 11 is connected and communicates with the signal processing unit. The signal processing unit is connected and communicates with the display. The signal processing unit is a single-chip microcomputer.

[0035] As Figure 3As shown, when the signal processing unit receives the electrical signal sent by the signal receiver 11, the signal processing unit processes the signal and displays parameters such as the flow rate and flow volume of the fluid through the display. The photoelectric speed detection replaces the magnetoresistive speed detection, overcoming electromagnetic interference. At the same time, the optical fiber probe for photoelectric conversion is moved from the inside of the pipeline to the outside of the pipeline to collect optical signals and measure the rotational speed of the axle, solving the problem that the measurement of the flow rate is affected by the cleanliness of the fluid to be measured.

[0036] Embodiment 3:

[0037] As Figure 1 and Figure 4 As shown, the present utility model discloses an optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, which includes the optoelectronic turbine flowmeter based on the planar magnetic coupling and the right-angle gear commutator described in Embodiment 2, and further includes a management terminal. The management terminal is a desktop computer, and the desktop computer is connected to and communicates with the signal processing unit.

[0038] As Figure 4 As shown, the desktop computer is convenient for collecting the detection data uploaded by the processing unit and is convenient for further management and use.

[0039] Compared with the above embodiment, the management terminal is a smart phone, and the smart phone is connected to and communicates with the processing unit through a wireless communication device, which is convenient for mobile office.

[0040] Compared with the above embodiment, the optoelectronic speed sensing device is a laser type speed sensor. The laser type speed sensor is fixedly connected inside the detection cavity 8 for directly detecting the rotational speed of the second planar magnetic coupling 7. By using the laser reflection principle, a signal of the rotor rotation is obtained, and the rotational speed of the rotor can be measured. The laser type speed sensor itself is a prior art and will not be described in detail.

Claims

1. An optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, characterized in that: It includes a turbine rotating mechanism and a detection unit. The turbine rotating mechanism includes a housing (1), a front flow deflector (2), a rear flow deflector (3), a turbine assembly, a right-angle gear commutator (5), a first planar magnetic coupling (6) and a second planar magnetic coupling (7) arranged inside the housing (1). The turbine assembly includes a turbine (4) and a turbine shaft. One end of the turbine shaft is fixedly connected to the front flow deflector (2), and the other end of the turbine shaft is fixedly connected to the rear flow deflector (3). The turbine (4) is fixedly connected to the turbine shaft. The right-angle gear commutator (5) is fixedly connected to the turbine shaft, and the first planar magnetic coupling (6) is fixedly connected to the driving worm of the right-angle gear commutator (5). The detection unit includes a detection cavity (8) and an optoelectronic speed sensing device arranged inside the detection cavity (8). The detection cavity (8) is fixedly connected to the outer surface of the housing (1). The second planar magnetic coupling (7) is located inside the detection cavity (8) on the side of the first planar magnetic coupling (6) and is rotatably connected to the detection cavity (8).

2. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 1, wherein: The optoelectronic speed sensing device includes an optoelectronic encoder disk (9), a signal transmitter (10) and a signal receiver (11). The optoelectronic encoder disk (9) is fixedly connected to the second planar magnetic coupling (7). The signal transmitter (10) and the signal receiver (11) are both fixedly connected to the inner wall of the detection cavity (8). The signal transmitter (10) is located on one side of the optoelectronic encoder disk (9), and the signal receiver (11) is located on the other side of the optoelectronic encoder disk (9).

3. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 1, characterized in that: A turbine cavity is formed inside the housing (1). The front flow deflector (2), the rear flow deflector (3), the turbine assembly, the right-angle gear commutator (5) and the first planar magnetic coupling (6) are all located inside the turbine cavity.

4. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 1, wherein: The second planar magnetic coupling (7) is magnetically connected to the first planar magnetic coupling (6). The optoelectronic speed sensing device is a speed sensing device for detecting the rotation speed of the second planar magnetic coupling (7).

5. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 1, wherein: It further includes a signal processing unit and a display. The optoelectronic speed sensing device is connected and communicates with the signal processing unit, and the signal processing unit is connected and communicates with the display.

6. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 5, characterized in that: It further includes a management terminal. The management terminal is connected and communicates with the signal processing unit.

7. The optoelectronic turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator according to claim 6, characterized in that: The management terminal is a desktop computer or a smart phone.

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