Bulb tubular turbine flow velocity measuring device

Abstract

The utility model discloses a bulb tubular turbine flow velocity measuring device which is characterized in that a through groove for liquid to flow is arranged in a base in a penetrating manner, a turbine is fixedly arranged in the through groove through a support column, and the output end of the turbine is connected with a flow velocity detection assembly. And the input end of the water turbine is connected with a flow detection assembly for activating the flow velocity detection assembly. The device has the beneficial effects that through cooperation of the flow detection assembly and the flow velocity detection assembly, the energy conversion efficiency of the generator can be detected when water flows, and after the water stops, collection of turbine rotation data can be stopped immediately; the turbine is prevented from continuously rotating due to inertia after the water flow stops to influence the detection precision.

Description

Technical Field

[0001] The utility model relates to the technical field of tubular turbines, in particular to a bulb tubular turbine flow velocity measuring device. Background Art

[0002] The bulb-type hydro turbine, as the name implies, is a hydroelectric unit that looks like a bulb. The generator is sealed in a bulb head that looks like an incandescent bulb. After the turbine is installed in the socket of the bulb, water flows from the "bulb mouth" into the "bulb head" to generate electricity. Therefore, this type of unit is figuratively called a bulb-type hydro turbine. The "big bulb" is designed mainly to meet the requirements of water energy utilization under low head conditions in rivers. It is an important supplement to the traditional hydropower generation method of using high-drop rivers to generate electricity. It can not only improve the utilization rate of water energy, but also has the advantages of high efficiency, small plant size, and small investment.

[0003] In order to test the energy conversion efficiency of the turbine, it is necessary to test the flow rate of the water that drives the turbine to rotate. The size of the water flow can be tested according to the rotation speed of the turbine, and the energy conversion efficiency can be tested according to the power generation energy consumption of the turbine. When the water flow stops, the turbine of the turbine will not stop immediately due to inertia, resulting in the continued recording of data after the water flow stops, which affects the accuracy of the experiment.

[0004] Therefore, those skilled in the art provide a bulb tubular turbine flow rate measuring device to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to provide a bulb tubular turbine flow velocity measuring device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A bulb-type cross-flow turbine flow velocity measuring device, wherein a through groove for liquid flow is provided through the base, and a turbine is fixedly provided in the through groove via a supporting column, the output end of the turbine is connected to a flow velocity detection component, and the input end of the turbine is connected to a flow detection component for activating the flow velocity detection component.

[0008] Furthermore, the flow velocity detection assembly includes a fixed platform and a rotation speed detection unit, the through slot is fixedly connected to the fixed platform near the output end of the water turbine, and the rotation speed detection unit is embedded on one side of the fixed platform near the water turbine turbine.

[0009] Furthermore, the flow detection assembly includes a boss, a baffle and a trigger unit, the boss is fixedly connected to the lower side of the input end of the turbine, the baffle is hinged at the lower end of the boss, and the trigger unit is connected to the side of the baffle close to the output end.

[0010] Furthermore, the trigger unit includes a piston and a sleeve, a sleeve is fixedly connected to one side of the lower end of the boss, a slide groove is concavely provided on one side of the sleeve close to the baffle, and a piston is provided on the sliding sleeve, a permanent magnet is embedded in one end of the piston located at the slide groove, and a Hall sensor for detecting changes in the magnetic field is embedded in the inner wall of the slide groove.

[0011] Furthermore, a push rod is connected between the side of the piston close to the baffle and the baffle, and both ends of the push rod are rotatably connected to the baffle and the piston respectively.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) By cooperating with the flow detection component and the flow velocity detection component, the energy conversion efficiency of the generator can be detected when the water flows. After the water flow stops, the collection of data on the rotation of the turbine can be stopped immediately to avoid the turbine continuing to rotate due to inertia after the water flow stops, which affects the detection accuracy.

[0014] (2) By setting up a flow detection component, the baffle can be pushed when the water flows, causing the piston to slide in the slide groove, thereby reducing the distance between the permanent magnet and the Hall sensor, thereby activating the flow rate detection component for data collection. After the water stops flowing, the baffle is reset by gravity, causing the piston to reset, increasing the distance between the permanent magnet and the Hall sensor, so that the flow rate detection component can be closed to collect data.

[0015] (3) By setting up a trigger unit, the distance between the permanent magnet and the Hall sensor can be changed according to the flow rate of the water flow. The greater the flow rate of the water flow, the smaller the distance between the permanent magnet and the Hall sensor will be, and the greater the magnetic field strength detected by the Hall sensor will be. Therefore, the trigger unit can not only activate the flow rate detection component, but also analyze and collect the flow rate data, thereby collecting the water flow rate from multiple angles and further improving the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a bulb tubular turbine flow velocity measuring device according to an embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a flow velocity detection assembly in a bulb tubular turbine flow velocity measurement device according to an embodiment of the utility model;

[0019] Figure 3 The present invention is a schematic structural diagram of a flow detection assembly in a bulb tubular turbine flow velocity measuring device according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] 1. Base; 2. Through slot; 3. Turbine; 4. Flow velocity detection assembly; 41. Fixing table; 42. Rotation speed detection unit; 5. Flow detection assembly; 51. Boss; 52. Baffle; 53. Trigger unit; 531. Piston; 532. Sleeve; 6. Slide; 7. Permanent magnet; 8. Hall sensor; 9. Push rod. DETAILED DESCRIPTION

[0022] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments: Embodiment 1:

[0023] See also Figure 1-3 According to a bulb-type cross-flow turbine flow velocity measuring device of an embodiment of the utility model, a through groove 2 for liquid flow is provided in the base 1, and a turbine 3 is fixedly provided in the through groove 2 by a supporting column, the output end of the turbine 3 is connected to a flow velocity detection component 4, and the input end of the turbine 3 is connected to a flow detection component 5 for activating the flow velocity detection component 4.

[0024] Through the above scheme of the utility model, the turbine 3 arranged in the through groove 2 can be used to drive the turbine to rotate through the liquid when the water flows, so that the flow rate detection component 4 arranged at the output end of the turbine 3 can calculate the speed of the water flow according to the turbine rotation speed of the turbine 3, and the flow detection component 5 arranged at the input end of the turbine 3 will contact the cross section of the baffle 52 when there is liquid flowing, so that the liquid flowing through the turbine 3 will drive the baffle 52 to rotate, so that the baffle 52 activates the trigger unit 53 through the push rod 9, thereby starting the flow rate detection component 4 to collect the turbine rotation data of the turbine 3, and when the water flows, the baffle 52 is no longer pushed by the water flow, and thus resets under the action of gravity, and then drives the trigger unit 53 to reset, stopping the flow rate detection component 4 from continuing to collect the turbine rotation data of the turbine 3, avoiding that when the water flow stops driving the turbine to rotate, the turbine will still continue to rotate slowly due to inertia to affect the data collection, and effectively improve the accuracy of the experimental data. Embodiment 2:

[0025] See also Figure 2-3 The flow velocity detection component 4 includes a fixed platform 41 and a speed detection unit 42. The through slot 2 is fixedly connected to the fixed platform 41 at the output end near the turbine 3. The speed detection unit 42 is embedded on the side of the fixed platform 41 near the turbine of the turbine 3. The flow detection component 5 includes a boss 51, a baffle 52 and a trigger unit 53. The lower side of the input end of the turbine 3 is fixedly connected to the boss 51. The lower end of the boss 51 is hinged with a baffle 52. The side of the baffle 52 near the output end is connected to the trigger unit 53. The trigger unit 53 includes a piston 531 and a sleeve 532, one side of the lower end of the boss 51 is fixedly connected with a sleeve 532, a side of the sleeve 532 close to the baffle 52 is concavely provided with a slide groove 6, and a sliding sleeve is provided with a piston 531, one end of the piston 531 located at the slide groove 6 is embedded with a permanent magnet 7, the inner wall of the slide groove 6 is embedded with a Hall sensor 8 for detecting magnetic field changes, a push rod 9 is connected between the side of the piston 531 close to the baffle 52 and the baffle 52, and both ends of the push rod 9 are rotatably connected with the baffle 52 and the piston 531 respectively.

[0026] According to the above scheme of the utility model, by setting the fixing platform 41 and the speed detection unit 42 embedded in the fixing platform 41, when the turbine of the water turbine 3 rotates, the blades on the turbine are magnetically conductive, so that the turbine is located in the magnetic field of the signal detector composed of the permanent magnet and the detection coil. When the rotating blades periodically cut the magnetic lines of force generated by the permanent magnet, the magnetic flux in the detection coil is caused to change periodically, thereby generating a periodic induced potential at both ends of the coil, that is, an electric pulse signal, so that the flow velocity can be detected, and the power generation efficiency can be calculated in combination with the total amount of power generation; at the same time, the water flow When the water flow stops, the baffle 52 will be pushed to move, thereby pushing the push rod 9 through the baffle 52 to squeeze the piston 531, so that the piston 531 slides in the chute 6, shortening the distance between the permanent magnet 7 and the Hall sensor 8, so that the magnetic field strength detected by the Hall sensor 8 becomes stronger and activates the speed detection unit 42, and the pushing effect of the water flow on the baffle 52 will also change, so the flow velocity of the water flow can be detected according to the sliding distance of the piston 531 in the chute 6, so that the flow detection component 5 can activate the flow velocity detection component 4 while also having a certain flow velocity detection effect, thereby improving the accuracy of the flow velocity data collection of the water flow. After the liquid stops flowing, the baffle 52 at the input end of the turbine 3 will be reset by gravity, so that the piston 531 is pulled by the push rod 9 to reset in the sleeve 532, disconnecting the flow velocity detection component 4, thereby preventing the turbine from continuing to rotate slowly according to inertia after the water flow stops, affecting the data collection of the flow velocity detection component 4, and effectively improving the detection accuracy. The rotation speed detection unit 42 is a plurality of Hall sensors 8 embedded in the fixing platform 41 .

[0027] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0028] In actual application, when water flows in the through groove 2 and contacts the turbine 3, the baffle 52 is pushed by the water flow to move, so that the baffle 52 squeezes the push rod 9 to make the piston 531 slide in the slide groove 6, and the distance between the permanent magnet 7 and the Hall sensor 8 is changed, so that the magnetic field strength detected by the Hall sensor 8 is enhanced, and the flow rate detection component 4 is activated. Subsequently, when the water flows to the output end of the turbine 3 and drives the turbine to rotate, the magnetic lines of force generated by the permanent magnet are periodically cut by the rotation of the turbine, which will cause periodic changes in the magnetic flux in the detection coil, thereby generating periodic induced potentials at both ends of the coil, that is, electric pulse signals, so as to calculate the flow rate of the water flow, and calculate the power generation efficiency of the current flow rate in combination with the power generation of the turbine.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bulb tubular turbine (3) flow velocity measuring device, comprising a base (1), characterized in that: A through groove (2) for liquid flow is provided through the base (1), and a water turbine (3) is fixedly provided in the through groove (2) via a support column, the output end of the water turbine (3) is connected to a flow velocity detection component (4), and the input end of the water turbine (3) is connected to a flow detection component (5) for activating the flow velocity detection component (4).

2. A bulb-type tubular turbine (3) flow velocity measuring device according to claim 1, characterized in that: The flow velocity detection assembly (4) comprises a fixed platform (41) and a rotation speed detection unit (42); the output end of the through slot (2) close to the water turbine (3) is fixedly connected to the fixed platform (41); and the rotation speed detection unit (42) is embedded on a side of the fixed platform (41) close to the turbine of the water turbine (3).

3. A bulb-type tubular turbine (3) flow velocity measuring device according to claim 1, characterized in that: The flow detection assembly (5) comprises a boss (51), a baffle (52) and a trigger unit (53); the boss (51) is fixedly connected to the lower side of the input end of the water turbine (3); the baffle (52) is hingedly connected to the lower end of the boss (51); and the trigger unit (53) is connected to a side of the baffle (52) close to the output end.

4. A bulb-type tubular turbine (3) flow velocity measuring device according to claim 3, characterized in that: The trigger unit (53) comprises a piston (531) and a sleeve (532); one side of the lower end of the boss (51) is fixedly connected to the sleeve (532); a side of the sleeve (532) close to the baffle (52) is concavely provided with a slide groove (6); and the sliding sleeve is provided with a piston (531); a permanent magnet (7) is embedded at one end of the piston (531) located in the slide groove (6); and a Hall sensor (8) for detecting magnetic field changes is embedded in the inner wall of the slide groove (6).

5. A bulb-type tubular turbine (3) flow velocity measuring device according to claim 4, characterized in that: A push rod (9) is connected between a side of the piston (531) close to the baffle (52) and the baffle (52), and two ends of the push rod (9) are rotatably connected to the baffle (52) and the piston (531), respectively.

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