Turbine flowmeter

Abstract

The utility model discloses a turbine flow meter, which belongs to the technical field of turbine flow meters and comprises a flow meter body, a flange plate is mounted at the end of the flow meter body, a preamplifier is fixedly connected to the upper end of the flow meter body, a magnetoelectric converter is mounted in the preamplifier, and the magnetoelectric converter is fixedly connected with the flange plate. A front guide piece and a rear guide piece are fixedly connected to the interior of the flow meter body, an impeller is connected between the front guide piece and the rear guide piece through a bearing, a filtering disc is installed in the flow meter body, and the upper end and the lower end of the filtering disc are connected with the interior of the flow meter body through auxiliary springs; a center rod is installed in the middle of the filtering disc, and a positioning rod is inserted into the center rod. According to the turbine flowmeter, after the filter screen is blocked, automatic cleaning of the filter screen can be achieved through fluid thrust, and meanwhile when the turbine flowmeter is connected with an external pipeline, the stability of connection between the pipeline and the turbine flowmeter is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine flowmeters, and specifically relates to a turbine flowmeter. Background Technique

[0002] A turbine flowmeter consists of a turbine flow sensor and a display instrument. The turbine flowmeter is a main type of velocity flowmeter. This type of flowmeter measures the average velocity of the fluid through a multi-blade rotor (turbine), and then derives the flow rate or total amount.

[0003] For example, in a Chinese patent with a publication date of May 25, 2021, titled "A Small Flow Turbine Flowmeter" and a publication number of CN213274378U, it includes an interface. A plate frame is slidably arranged inside the interface, a limiting block in contact with the plate frame is fixed inside the interface, a filter screen is fixedly embedded inside the plate frame, a shaft seat is fixed inside the interface, a rotating shaft is fixed on the shaft seat, blades are fixed on the rotating shaft, a bearing through which the rotating shaft passes is fixedly embedded on the interface, and an arc-shaped block is fixed on the inner wall of the interface. The filter screen can filter impurities to avoid damage to the blades caused by impurity particles. At the same time, the filter screen is convenient to disassemble for regular cleaning. Moreover, the arc-shaped block can play a role in guiding the flow to ensure the stable rotation of the blades.

[0004] Among the above-mentioned prior arts, there are the following technical problems: In order to prevent a large amount of impurities in the fluid from adhering to the turbine and affecting the rotation speed of the turbine, a filter screen is provided inside the flowmeter. However, after a period of use, a large amount of impurities are likely to adhere to the filter screen. When the filter holes on the filter screen are blocked by impurities and are not easy to clean, it is likely to affect the normal flow of the fluid. At the same time, when the turbine flowmeter is connected to an external pipeline, it is not convenient to stably limit the external pipeline. When the pipeline becomes loose, it is likely to cause leakage of the conveyed fluid.

[0005] Therefore, we propose a turbine flowmeter to solve the problems raised above. Content of the Utility Model

[0006] The purpose of the utility model is to provide a turbine flowmeter to solve the problems in the above-mentioned background technique, that is, in the existing turbine flowmeters on the market, in order to prevent a large amount of impurities in the fluid from adhering to the turbine and affecting the rotation speed of the turbine, a filter screen is provided inside the flowmeter. However, after a period of use, a large amount of impurities are likely to adhere to the filter screen. When the filter holes on the filter screen are blocked by impurities and are not easy to clean, it is likely to affect the normal flow of the fluid. At the same time, when the turbine flowmeter is connected to an external pipeline, it is not convenient to stably limit the external pipeline. When the pipeline becomes loose, it is likely to cause leakage of the conveyed fluid.

[0007] To achieve the above object, the present utility model provides the following technical solution: A turbine flowmeter, comprising a flowmeter body, a flange is installed at the end of the flowmeter body, and a preamplifier is fixedly connected to the upper end of the flowmeter body. A magnetoelectric converter is installed inside the preamplifier. A front guide and a rear guide are fixedly connected inside the flowmeter body, and an impeller is connected between the front guide and the rear guide through a bearing.

[0008] It further includes:

[0009] A filter disc is installed inside the flowmeter body, and the upper and lower ends of the filter disc are connected to the inside of the flowmeter body through a boosting spring. A central rod is installed in the middle of the filter disc, and a positioning rod is inserted into the central rod. The positioning rod is fixed on the front guide, and a clamping block is fixedly connected to the end of the positioning rod away from the front guide. The clamping block is inserted into the connection groove inside the central rod. A branch rod is fixedly connected to the central rod, and a knocking rod is installed through the end of the branch rod away from the central rod. A first magnet is embedded inside the knocking rod, and the knocking rod is connected to the branch rod through a built-in spring. A second magnet is embedded on the edge of the side of the filter disc facing the branch rod. A locking component for connecting an external pipeline is installed on the flange.

[0010] Preferably, the outer walls of the upper and lower ends of the filter disc are in close contact with the inner wall of the flowmeter body, and the filter disc and the flowmeter body form an elastic telescopic structure through the boosting spring.

[0011] By adopting the above technical solution, the setting of the boosting spring enables the filter disc to reset and rebound after moving inside the flowmeter body.

[0012] Preferably, the outer wall of the clamping block at the end of the positioning rod is in close contact with the inner wall of the connection groove, and the connection groove is arranged in a spiral shape inside the central rod, and the central rod can rotate in the middle of the filter disc.

[0013] By adopting the above technical solution, through the movement of the clamping block at the end of the positioning rod inside the connection groove, the central rod can be rotated on the filter disc.

[0014] Preferably, a plurality of branch rods are evenly distributed in the circumferential direction of the central rod, and a knocking rod is installed through each branch rod, and the knocking rod and the branch rod are in sliding connection.

[0015] By adopting the above technical solution, through the rotation of the central rod, a plurality of branch rods evenly distributed in the circumferential direction can be synchronously rotated.

[0016] Preferably, the spherical end of the tapping rod is in contact with the edge of the filter disc in the initial state, and the first magnet embedded in the tapping rod and the second magnet at the edge of the filter disc have the same magnetic property, and a plurality of second magnets are evenly distributed at equal angles on the edge of the filter disc.

[0017] By adopting the above technical solution, the reciprocating movement of the tapping rod can be realized by changing the distance between the first magnet embedded in the tapping rod and the second magnet.

[0018] Preferably, the locking component includes a locking screw, a positioning nut and a shock-absorbing gasket, and the locking screw is installed through the screw holes of the flange and the external pipeline. Both ends of the locking screw are connected with positioning nuts, and shock-absorbing gaskets are installed between the positioning nut and the external pipeline and between the positioning nut and the flange.

[0019] By adopting the above technical solution, the setting of the positioning nut can facilitate the locking between the external pipeline and the flange.

[0020] Preferably, the end of the positioning nut and the locking screw are both connected by threads, and the positioning nut is set as a hexagonal nut.

[0021] By adopting the above technical solution, the stability after the installation between the external pipeline and the flange is ensured by the setting of the positioning nut.

[0022] Compared with the prior art, the beneficial effects of the present utility model are: the turbine flowmeter can automatically clean the filter screen through the fluid thrust after the filter screen is blocked, and at the same time, when connecting with the external pipeline, effectively ensure the stability of the connection between the pipeline and the turbine flowmeter;

[0023] 1. A preamplifier is provided. When the fluid passes through the flowmeter body, the impact impeller generates a driving torque on the impeller, causing the impeller to rotate. Within a certain flow range and for a certain fluid medium viscosity, the rotational angular velocity of the impeller is proportional to the fluid flow velocity. The fluid flow velocity can be obtained through the rotational angular velocity of the impeller, and thus the fluid flow rate of the pipeline can be calculated. When the blades of the impeller cut the magnetic force lines generated by the magnetoelectric converter in the pre-signal amplifier, it causes a change in the magnetic flux in the sensing coil. The pre-signal amplifier amplifies and shapes the periodic change signal of the magnetic flux detected by the internal sensing coil, generating a pulse square wave signal proportional to the flow velocity, and obtaining the instantaneous flow rate and cumulative flow rate through the processing of the pre-signal amplifier;

[0024] 2. A filter disc is provided. By arranging the filter disc inside the fluid inlet port of the flowmeter body, impurities in the fluid can be filtered out. When the filter disc is blocked, the fluid can push the filter disc to move. After the filter disc moves, through the spiral connecting groove on the central rod and the clamping block at the end of the positioning rod, the central rod can drive the branch rod to rotate. By using the change in the distance between the first magnet and the second magnet on the knocking rod after the branch rod rotates, the knocking rod can move reciprocally. By knocking the filter disc with the reciprocating movement of the knocking rod, the impurities attached to the filter disc can be shaken off, thereby realizing the automatic cleaning of the filter disc.

[0025] 3. A positioning nut is provided. By screwing two positioning nuts at the end of the locking screw, it is convenient to fix the external pipeline and the flange. At the same time, the impact of the vibration generated by fluid transportation on the positioning nut can be reduced by using the shock-absorbing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a front three-dimensional structural schematic diagram of the present utility model;

[0027] Figure 2 is a structural schematic diagram of the flowmeter body and the filter disc of the present utility model;

[0028] Figure 3 is a structural schematic diagram of the front guide member, rear guide member and impeller of the present utility model;

[0029] Figure 4 is the present utility model Figure 3 is an enlarged structural schematic diagram at A in the present utility model;

[0030] Figure 5 is a structural schematic diagram of the filter disc and the second magnet of the present utility model;

[0031] Figure 6 is the present utility model Figure 5 is an enlarged structural schematic diagram at B in the present utility model;

[0032] Figure 7 is a sectional structural schematic diagram of the knocking rod and the first magnet of the present utility model;

[0033] Figure 8 is an exploded structural schematic diagram of the locking screw and the positioning nut of the present utility model.

[0034] In the figure: 1. Flowmeter body; 2. Flange; 3. Preamplifier; 4. Front guide; 5. Rear guide; 6. Impeller; 7. Filter disc; 8. Boosting spring; 9. Central rod; 10. Positioning rod; 11. Clamping block; 12. Connecting groove; 13. Branch rod; 14. Knocking rod; 15. First magnet; 16. Built-in spring; 17. Second magnet; 18. Locking screw; 19. Positioning nut; 20. Shock-absorbing gasket. Detailed implementation mode

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1: Please refer to Figures 1 - 8 , in order to prevent a large amount of impurities in the fluid from attaching to the turbine and affecting the rotation speed of the turbine, a filter screen is provided inside the flowmeter. However, after the filter screen is used for a period of time, a large amount of impurities are likely to attach to it. When the impurities block the filter holes on the filter screen and are not easy to clean, it is likely to affect the normal flow of the fluid. To solve this technical problem, the following technical content is disclosed in this embodiment;

[0037] A turbine flowmeter, comprising a flowmeter body 1, a flange 2 is installed at the end of the flowmeter body 1, and a preamplifier 3 is fixedly connected to the upper end of the flowmeter body 1. A magnetoelectric converter is installed inside the preamplifier 3. A front guide 4 and a rear guide 5 are fixedly connected inside the flowmeter body 1, and an impeller 6 is connected between the front guide 4 and the rear guide 5 through a bearing. A filter disc 7 is installed inside the flowmeter body 1, and the upper and lower ends of the filter disc 7 are interconnected with the inside of the flowmeter body 1 through a boosting spring 8. A central rod 9 is installed in the middle of the filter disc 7, and a positioning rod 10 is inserted into the central rod 9. The positioning rod 10 is fixed on the front guide 4, and a clamping block 11 is fixedly connected to the end of the positioning rod 10 away from the front guide 4. The clamping block 11 is inserted into an engagement groove 12 inside the central rod 9. A branch rod 13 is fixedly connected to the central rod 9, and a knocking rod 14 is installed through the end of the branch rod 13 away from the central rod 9. A first magnet 15 is embedded inside the knocking rod 14, and the knocking rod 14 is connected to the branch rod 13 through a built-in spring 16. A second magnet 17 is embedded on the edge of the side of the filter disc 7 facing the branch rod 13. The outer walls of the upper and lower ends of the filter disc 7 are in contact with the inner wall of the flowmeter body 1, and the filter disc 7 and the flowmeter body 1 form an elastic telescopic structure through the boosting spring 8. The outer wall of the clamping block 11 at the end of the positioning rod 10 is in contact with the inner wall of the engagement groove 12, and the engagement groove 12 is arranged in a spiral shape inside the central rod 9, and the central rod 9 can rotate in the middle of the filter disc 7. A plurality of branch rods 13 are evenly distributed in the circumferential direction of the central rod 9, and a knocking rod 14 is installed through each branch rod 13, and the knocking rod 14 and the branch rod 13 are in sliding connection. The spherical end of the knocking rod 14 is in contact with the edge of the filter disc 7 in the initial state, and the first magnet 15 embedded inside the knocking rod 14 and the second magnet 17 on the edge of the filter disc 7 have the same magnetic property, and a plurality of second magnets 17 are evenly distributed at equal angles on the edge of the filter disc 7.

[0038] When the fluid passes through the flowmeter body 1, the impurities in the fluid are filtered by the filter disc 7. Then, the fluid impacts the impeller 6 to generate a driving torque on the impeller 6, causing the impeller 6 to rotate. Within a certain flow range and for a certain fluid medium viscosity, the rotational angular velocity of the impeller 6 is proportional to the fluid flow velocity. The fluid flow velocity can be obtained through the rotational angular velocity of the impeller 6, and thus the fluid flow rate in the pipeline can be calculated. When the blades of the impeller 6 cut the magnetic force lines generated by the magnetoelectric converter in the preamplifier 3, it causes a change in the magnetic flux in the sensing coil. The preamplifier 3 amplifies and shapes the periodic change signal of the magnetic flux detected by the internal sensing coil, generating a pulsed square wave signal proportional to the flow velocity. The instantaneous flow rate and cumulative flow rate are obtained through the processing of the preamplifier 3. When the filter disc 7 becomes blocked, the fluid flow can push the filter disc 7 after flowing. After the filter disc 7 moves, the central rod 9 can move on the positioning rod 10. At this time, the clamping block 11 on the positioning rod 10 moves in the spiral connecting groove 12 inside the central rod 9. Thus, the central rod 9 can drive the branch rod 13 to rotate synchronously. When the first magnet 15 inside the knocking rod 14 and the second magnet 17 on the filter disc 7 approach each other after the branch rod 13 rotates, using the repulsive magnetic force between the two magnets, the knocking rod 14 can be made to move away from the filter disc 7. When the branch rod 13 continues to rotate and the first magnet 15 on the knocking rod 14 and the second magnet 17 on the filter disc 7 move away from each other, the knocking rod 14 rebounds under the action of the built-in spring 16. Using the reset knocking rod 14 to impact the filter disc 7, the impurities attached to the filter disc 7 can be shaken off through the vibration generated by the impact of the knocking rod 14 on the filter disc 7, realizing the automatic cleaning of the filter disc 7. After the filter disc 7 is unclogged, the filter disc 7 rebounds under the action of the boosting spring 8.

[0039] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above Embodiment 1. When the turbine flowmeter is connected to the external pipeline, it is not convenient to stably limit the external pipeline. When the pipeline becomes loose, it is easy to cause the fluid being transported to leak. To further solve this technical problem, the following technical content is disclosed in this embodiment, as Figure 1 and Figure 8 shown;

[0040] A locking component for connecting with the external pipeline is installed on the flange plate 2. The locking component includes a locking screw 18, a positioning nut 19, and a shock-absorbing gasket 20. The locking screw 18 is installed through the screw holes of the flange plate 2 and the external pipeline. Both ends of the locking screw 18 are connected with positioning nuts 19, and shock-absorbing gaskets 20 are installed between the positioning nut 19 and the external pipeline and between the positioning nut 19 and the flange plate 2. The end of the positioning nut 19 is threadedly connected to the locking screw 18, and the positioning nut 19 is set as a hexagonal nut.

[0041] When connecting the pipeline, align the external pipeline with the flange 2. At this time, pass the locking screw 18 through the screw holes on the external pipeline and the flange 2, and then screw the positioning nut 19 onto the locking screw 18. Thus, the stability limit of the external pipeline and the flange 2 can be completed, preventing loosening between the two. At the same time, the setting of the shock-absorbing gasket 20 can reduce the impact on the positioning nut 19 caused by the vibration during fluid transportation.

[0042] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0043] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A turbine flowmeter, comprising a flowmeter body (1), a flange (2) being mounted at the end of the flowmeter body (1), a preamplifier (3) being fixedly connected to the upper end of the flowmeter body (1), a magnetoelectric converter being mounted inside the preamplifier (3), a front guide (4) and a rear guide (5) being fixedly connected inside the flowmeter body (1), and an impeller (6) being connected between the front guide (4) and the rear guide (5) via a bearing. It is characterized in that Also includes: A filter disc (7) is installed inside the flow meter body (1), and the upper and lower ends of the filter disc (7) are connected to the inside of the flow meter body (1) via a booster spring (8). A center rod (9) is installed in the middle of the filter disc (7), and a positioning rod (10) is inserted into the inside of the center rod (9). The positioning rod (10) is fixed to the front guide member (4), and a clamping block (11) is fixedly connected to the end of the positioning rod (10) away from the front guide member (4). The clamping block (11) is inserted into the center rod (9). In the connection groove (12), a branch rod (13) is fixedly connected to the center rod (9), and a knocking rod (14) is installed through one end of the branch rod (13) away from the center rod (9), a first magnetic block (15) is embedded in the knocking rod (14), and the knocking rod (14) and the branch rod (13) are connected to each other through a built-in spring (16), a second magnetic block (17) is embedded on the edge of one side of the filter plate (7) facing the branch rod (13), and a locking component for connecting external pipes to each other is installed on the flange plate (2).

2. A turbine flowmeter according to claim 1, characterized in that: The outer walls of the upper and lower ends of the filter disc (7) and the inner wall of the flow meter body (1) fit together, and the filter disc (7) forms an elastic telescopic structure with the helper spring (8) and the flow meter body (1).

3. A turbine flowmeter according to claim 1, characterized in that: The outer wall of the block (11) at the end of the positioning rod (10) and the inner wall of the connecting groove (12) fit together, and the connecting groove (12) is arranged in a spiral shape inside the center rod (9), and the center rod (9) can rotate in the middle of the filter disc (7).

4. A turbine flowmeter according to claim 1, characterized in that: A plurality of branch rods (13) are evenly distributed in the circumferential direction of the central rod (9), and a knocking rod (14) is installed through each branch rod (13), and the knocking rod (14) and the branch rod (13) are slidably connected.

5. A turbine flowmeter according to claim 1, characterized in that: The spherical end of the knocking rod (14) is in contact with the edge of the filter disc (7) in an initial state, and the first magnetic block (15) embedded in the knocking rod (14) and the second magnetic block (17) on the edge of the filter disc (7) have the same magnetic properties, and a plurality of second magnetic blocks (17) are evenly distributed at equal angles on the edge of the filter disc (7).

6. A turbine flowmeter according to claim 1, characterized in that: The locking component comprises a locking screw (18), a positioning nut (19) and a shock-absorbing gasket (20), and the locking screw (18) is installed through the screw holes of the flange (2) and the external pipe, both ends of the locking screw (18) are connected with the positioning nuts (19), and the shock-absorbing gasket (20) is installed between the positioning nut (19) and the external pipe and between the positioning nut (19) and the flange (2).

7. A turbine flowmeter according to claim 6, characterized in that: The end of the positioning nut (19) and the locking screw (18) are both threadedly connected, and the positioning nut (19) is configured as a hexagonal nut.

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