Rotor flow meter

Abstract

The utility model discloses a rotor flow meter, relates to the technical field of fluid metering, and solves the technical problem that a rotor flow meter in the prior art is inconvenient to install. The rotor flow meter comprises a shell which is provided with an installation cavity, one end of the shell is provided with an air inlet, and the shell is communicated with the installation cavity; the rotating shaft is rotationally mounted in the mounting cavity and is coaxially arranged with the shell; the sealing bearing is arranged between the rotating shaft and the shell; the impeller is mounted at one end of the rotating shaft close to the air inlet; the magnet is mounted at one end of the rotating shaft away from the air inlet; and the sensor is arranged in the shell and is arranged corresponding to the magnet. Therefore, the rotating shaft is installed through the sealing bearing, the impeller and the magnet which are installed on the rotating shaft are not affected by the installation position, and therefore the rotor flow meter is more convenient to install and higher in adaptability.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid metering, and particularly relates to a rotameter. Background Art

[0002] Measurement is the eye of industrial production. Flow measurement is one of the components of metrology science and technology. It is closely related to the national economy, national defense construction, and scientific research. Doing a good job in this work has an important role in ensuring product quality, improving production efficiency, and promoting the development of science and technology. Especially in the current era of energy crisis and increasingly high degree of industrial production automation, the status and role of flow meters in the national economy are more obvious.

[0003] The working principle of a rotameter is based on the throttling principle, that is, when a fluid passes through a narrow part, its velocity will increase, and when it passes through a throttling device such as an orifice plate or a Venturi tube, the change in velocity will cause a change in pressure difference. Inside the flow meter, this pressure difference acts on the rotor, causing it to lift. The greater the fluid velocity, the higher the rotor lifts, so the flow rate can be indicated by the position of the rotor.

[0004] However, this type of rotameter must be installed strictly vertically, otherwise it will cause large errors. Summary of the Utility Model

[0005] The utility model provides a rotameter to solve the technical problem that the existing rotameter is not convenient for installation.

[0006] The utility model is achieved through the following technical solutions:

[0007] A rotameter, comprising:

[0008] A housing having an installation cavity, with an air inlet opened at one end and communicating with the installation cavity;

[0009] A rotating shaft rotatably installed in the installation cavity and coaxially arranged with the housing;

[0010] A sealed bearing installed between the rotating shaft and the housing;

[0011] An impeller installed at one end of the rotating shaft close to the air inlet;

[0012] A magnet installed at one end of the rotating shaft far from the air inlet;

[0013] A sensor installed in the housing and correspondingly arranged with the magnet.

[0014] Furthermore, it also includes an air collecting pipe, one end of which is installed on one end of the shell close to the air inlet, and the other end extends in a direction close to the impeller and is connected to the air inlet.

[0015] Furthermore, the inner diameter of the air collecting pipe gradually decreases along the first direction, and the small diameter end of the air collecting pipe is arranged opposite to the impeller.

[0016] Furthermore, the longitudinal section of the gas collecting pipe is in the shape of a truncated cone.

[0017] Furthermore, there are multiple sealed bearings, and the multiple sealed bearings are arranged at intervals along the first direction.

[0018] Furthermore, the sealed bearing is a metal sealed bearing.

[0019] Furthermore, it also includes a display, which is installed outside the housing and electrically connected to the sensor.

[0020] Furthermore, the sensor is a transient sensor.

[0021] Furthermore, the rotating shaft is a structural member made of anti-corrosion material.

[0022] Furthermore, the rotating shaft is a structural member made of polypropylene.

[0023] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0024] The rotor flowmeter provided by the utility model includes a shell, a rotating shaft, a sealed bearing, an impeller, a magnet and a sensor. The shell has an installation cavity, one end of which is provided with an air inlet and is connected to the installation cavity. The rotating shaft is rotatably installed in the installation cavity and is coaxially arranged with the shell. The sealed bearing is installed between the rotating shaft and the shell. The impeller is installed at one end of the rotating shaft close to the air inlet. The magnet is installed at one end of the rotating shaft close to the air inlet. The sensor is installed in the shell and is arranged corresponding to the magnet.

[0025] With the above structure, when using the rotameter provided by the present utility model, first install it on the pipeline to be measured, and make the pipeline to be measured communicate with the rotameter provided by the present utility model through the air inlet. When the fluid passes through the pipeline, the gas in the housing is squeezed, causing the impeller connected to the housing through the sealed bearing to start rotating. Since the rotating shaft is connected to the housing through the sealed bearing, the probability of measurement error caused by gas leakage is reduced. The rotation of the impeller drives the rotating shaft connected to the impeller to rotate together, so that the magnet installed on the rotating shaft rotates synchronously. The sensor detects the magnet, thereby obtaining the rotation speed of the magnet, and further obtaining the flow rate of the fluid. Therefore, the rotating shaft installed through the sealed bearing enables the impeller and the magnet installed on the rotating shaft to be unaffected by the installation position, and further makes the rotameter provided by the present utility model easier to install and more adaptable. Description of the Drawings

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not limit the embodiments of the present utility model. In the drawings:

[0027] Figure 1 is a schematic structural diagram of the rotameter provided by the embodiment of the present utility model;

[0028] Figure 2 is an exploded view of the rotameter provided by the embodiment of the present utility model;

[0029] Figure 3 is a cross-sectional view of the rotameter provided by the embodiment of the present utility model.

[0030] Marks in the drawings and corresponding component names:

[0031] 1 - housing, 11 - installation cavity, 12 - air inlet, 2 - rotating shaft, 3 - sealed bearing, 4 - impeller, 5 - magnet, 6 - sensor, 7 - gas collecting pipe, 8 - display. Detailed Embodiments

[0032] To make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0033] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0034] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0036] Embodiment:

[0037] This embodiment provides a rotameter to solve the technical problem that the existing rotameters are not convenient to install. The rotameter includes a housing 1, a rotating shaft 2, a sealed bearing 3, an impeller 4, a magnet 5, and a sensor 6, where:

[0038] The housing 1 has an installation cavity 11, and an air inlet 12 is opened at one end and is communicated with the installation cavity 11. Specifically, the housing 1 further includes an external connection part, which is an annular block. The inner diameter of the annular block is equal to the inner diameter of the air inlet 12 and is communicated. A plurality of threaded holes are opened on the annular block, and the annular block is connected to an external object by bolts.

[0039] The rotating shaft 2 is rotatably installed in the installation cavity 11 and is coaxially arranged with the housing 1.

[0040] The sealed bearing 3 is installed between the rotating shaft 2 and the housing 1, that is, the outer ring of the sealed bearing 3 is installed on the inner side wall of the housing 1, and the rotating shaft 2 is fixedly installed in the inner ring of the sealed bearing 3, so as to achieve the purpose of rotatably installing the rotating shaft 2 in the installation cavity 11. At the same time, through the setting of the sealed bearing 3, the probability of gas leakage is reduced, and thus the measurement result is more accurate.

[0041] The impeller 4 is installed at one end of the rotating shaft 2 close to the air inlet 12. Through the setting of the impeller 4, when the fluid passes through the air inlet 12, the gas in the housing is squeezed, thereby driving the impeller 4 to rotate. The rotation of the impeller 4 causes the rotating shaft 2 connected to the impeller 4 to rotate together.

[0042] The magnet 5 is installed at one end of the rotating shaft 2 away from the air inlet 12. In this way, when the rotating shaft 2 rotates, the magnet 5 located on the rotating shaft 2 rotates synchronously.

[0043] The sensor 6 is installed inside the housing 1 and is arranged corresponding to the magnet 5. In this way, by setting the sensor 6, the rotation speed of the magnet 5 is detected, and thus the magnitude of the fluid flow rate is obtained.

[0044] With the above structure, when using the rotor flowmeter provided by the present utility model, first install it on the pipeline to be measured. The pipeline to be measured is connected to the rotor flowmeter provided by the present utility model through the air inlet 12. When the fluid passes through the pipeline, the gas in the housing 1 is squeezed, causing the impeller 4 connected to the housing 1 through the sealed bearing 3 to start rotating. Since the rotating shaft 2 and the housing 1 are connected through the sealed bearing 3, the probability of measurement error caused by gas leakage is reduced. The rotation of the impeller 4 drives the rotating shaft 2 connected to the impeller 4 to rotate together, so that the magnet 5 installed on the rotating shaft 2 rotates synchronously. By detecting the magnet 5 through the sensor 6, the rotation speed of the magnet 5 is obtained, and then the magnitude of the fluid flow rate is obtained. Therefore, the impeller 4 installed through the sealed bearing 3 makes the impeller 4 not affected by the installation position, and further makes the rotor flowmeter provided by the present utility model more convenient to install and more adaptable.

[0045] An optional implementation manner of this embodiment is as follows: It further includes a gas collecting pipe 7. One end is installed at one end of the housing 1 close to the air inlet 12, and the other end extends towards the direction close to the impeller 4 and is connected and arranged with the air inlet 12. Through the setting of the gas collecting pipe 7, the gas is concentrated in the gas collecting pipe 7 and directly transported to the impeller 4, avoiding gas overflow and reducing the probability that the impeller 4 cannot rotate due to slow fluid flow rate, thereby increasing the measurement range of the rotor flowmeter provided by the present utility model.

[0046] Optionally, the inner diameter of the gas collecting pipe 7 gradually decreases along the first direction, and the small-diameter end of the gas collecting pipe 7 is arranged opposite to the impeller 4. Specifically, the first direction is the axial direction of the rotating shaft 2, and the inner diameter of the gas collecting pipe 7 gradually decreases from the end far away from the impeller 4 towards the end gradually approaching the impeller 4. In this way, through the setting of the gas collecting pipe 7 with a gradually decreasing inner diameter, the flow of the gas is accelerated.

[0047] Optionally, the longitudinal section of the gas collecting pipe 7 is frustum-shaped.

[0048] An optional implementation manner of this embodiment is as follows: The number of the sealed bearings 3 is multiple, and the multiple sealed bearings 3 are arranged at intervals along the first direction. In this way, through the setting of the multiple sealed bearings 3, the rotation of the rotating shaft 2 is prevented from tilting, and at the same time, the probability of the bearing having an axial displacement due to being squeezed by the gas is reduced.

[0049] Optionally, the sealed bearing 3 is a metal sealed bearing 3, and the metal sealed bearing 3 has less resistance, thereby reducing the measurement error.

[0050] An alternative implementation of this embodiment is as follows: It further includes a display 8, which is installed outside the housing 1 and electrically connected to the sensor 6. Through the setting of the display 8, it is more convenient to directly read the value of the fluid flow rate, eliminating the need for the tester to observe the reading with the naked eye, and further reducing errors.

[0051] An alternative implementation of this embodiment is as follows: The sensor 6 is a Hall sensor 6, and the Hall sensor 6 has higher measurement accuracy.

[0052] An alternative implementation of this embodiment is as follows: The rotating shaft 2 is a structural member made of anti-corrosion material to prevent the rotating shaft 2 from being damaged due to corrosion.

[0053] Optionally, the rotating shaft 2 is a structural member made of polypropylene. In this way, the rotating shaft 2 made of polypropylene not only has anti-corrosion properties but also is lighter in weight, reducing the influence of the gravity of the rotating shaft 2 on the test results.

[0054] The specific implementation manners described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotor flow meter, characterized in that: include: The housing (1) has a mounting cavity (11), one end of which is provided with an air inlet (12) which is in communication with the mounting cavity (11); A rotating shaft (2) is rotatably mounted in the mounting cavity (11) and is coaxially arranged with the housing (1); A sealed bearing (3) installed between the rotating shaft (2) and the housing (1); An impeller (4) is mounted on one end of the rotating shaft (2) close to the air inlet (12); A magnet (5) is mounted on an end of the rotating shaft (2) away from the air inlet (12); A sensor (6) is installed in the housing (1) and is arranged corresponding to the magnet (5).

2. A rotor flowmeter according to claim 1, characterized in that: It also includes an air collecting pipe (7), one end of which is mounted on one end of the housing (1) close to the air inlet (12), and the other end of which extends in a direction close to the impeller (4) and is connected to the air inlet (12).

3. A rotor flowmeter according to claim 2, characterized in that: The inner diameter of the air collecting pipe (7) gradually decreases along the first direction, and the small-diameter end of the air collecting pipe (7) is arranged opposite to the impeller (4).

4. A rotor flowmeter according to claim 3, characterized in that: The longitudinal section of the gas collecting pipe (7) is in the shape of a truncated cone.

5. A rotor flowmeter according to claim 3, characterized in that: The number of the sealed bearings (3) is plural, and the plurality of sealed bearings (3) are arranged at intervals along the first direction.

6. A rotor flowmeter according to claim 5, characterized in that: The sealed bearing (3) is a metal sealed bearing (3).

7. A rotor flowmeter according to claim 1, characterized in that: It also includes a display (8) which is installed outside the housing (1) and is electrically connected to the sensor (6).

8. A rotor flowmeter according to any one of claims 1 to 7, characterized in that: The sensor (6) is a Hall sensor (6).

9. A rotor flowmeter according to any one of claims 1 to 7, characterized in that: The rotating shaft (2) is a structural component made of anti-corrosion material.

10. A rotor flowmeter according to claim 9, characterized in that: The rotating shaft (2) is a structural member made of polypropylene.

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